diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-09-08 01:01:14 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-09-08 01:01:14 -0300 |
| commit | e5fd91f1ef340da553f7a79da9540c3db711c937 (patch) | |
| tree | b11842027dc6641da63f4bcc524f8678263304a3 /drivers/staging/unisys | |
| parent | 2a9b0348e685a63d97486f6749622b61e9e3292f (diff) | |
Linux-libre 4.2-gnu
Diffstat (limited to 'drivers/staging/unisys')
71 files changed, 5411 insertions, 10053 deletions
diff --git a/drivers/staging/unisys/Kconfig b/drivers/staging/unisys/Kconfig index 19fcb3465..778f9d05f 100644 --- a/drivers/staging/unisys/Kconfig +++ b/drivers/staging/unisys/Kconfig @@ -4,16 +4,14 @@ menuconfig UNISYSSPAR bool "Unisys SPAR driver support" depends on X86_64 + select PCI + select ACPI ---help--- Support for the Unisys SPAR drivers if UNISYSSPAR -source "drivers/staging/unisys/visorutil/Kconfig" -source "drivers/staging/unisys/visorchannel/Kconfig" -source "drivers/staging/unisys/visorchipset/Kconfig" -source "drivers/staging/unisys/uislib/Kconfig" -source "drivers/staging/unisys/virtpci/Kconfig" -source "drivers/staging/unisys/virthba/Kconfig" +source "drivers/staging/unisys/visorbus/Kconfig" +source "drivers/staging/unisys/visornic/Kconfig" endif # UNISYSSPAR diff --git a/drivers/staging/unisys/Makefile b/drivers/staging/unisys/Makefile index 68b9925e7..a515ebc4f 100644 --- a/drivers/staging/unisys/Makefile +++ b/drivers/staging/unisys/Makefile @@ -1,9 +1,5 @@ # # Makefile for Unisys SPAR drivers # -obj-$(CONFIG_UNISYS_VISORUTIL) += visorutil/ -obj-$(CONFIG_UNISYS_VISORCHANNEL) += visorchannel/ -obj-$(CONFIG_UNISYS_VISORCHIPSET) += visorchipset/ -obj-$(CONFIG_UNISYS_UISLIB) += uislib/ -obj-$(CONFIG_UNISYS_VIRTPCI) += virtpci/ -obj-$(CONFIG_UNISYS_VIRTHBA) += virthba/ +obj-$(CONFIG_UNISYS_VISORBUS) += visorbus/ +obj-$(CONFIG_UNISYS_VISORNIC) += visornic/ diff --git a/drivers/staging/unisys/common-spar/include/channels/controlframework.h b/drivers/staging/unisys/common-spar/include/channels/controlframework.h deleted file mode 100644 index 33d9caf33..000000000 --- a/drivers/staging/unisys/common-spar/include/channels/controlframework.h +++ /dev/null @@ -1,62 +0,0 @@ -/* Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * Module Name: - * controlframework.h - * - * Abstract: This file defines common structures in the unmanaged - * Ultravisor (mostly EFI) space. - * - */ - -#ifndef _CONTROL_FRAMEWORK_H_ -#define _CONTROL_FRAMEWORK_H_ - -#include <linux/types.h> -#include "channel.h" - -struct spar_segment_state { - u16 enabled:1; /* Bit 0: May enter other states */ - u16 active:1; /* Bit 1: Assigned to active partition */ - u16 alive:1; /* Bit 2: Configure message sent to - * service/server */ - u16 revoked:1; /* Bit 3: similar to partition state - * ShuttingDown */ - u16 allocated:1; /* Bit 4: memory (device/port number) - * has been selected by Command */ - u16 known:1; /* Bit 5: has been introduced to the - * service/guest partition */ - u16 ready:1; /* Bit 6: service/Guest partition has - * responded to introduction */ - u16 operating:1; /* Bit 7: resource is configured and - * operating */ - /* Note: don't use high bit unless we need to switch to ushort - * which is non-compliant */ -}; - -static const struct spar_segment_state segment_state_running = { - 1, 1, 1, 0, 1, 1, 1, 1 -}; - -static const struct spar_segment_state segment_state_paused = { - 1, 1, 1, 0, 1, 1, 1, 0 -}; - -static const struct spar_segment_state segment_state_standby = { - 1, 1, 0, 0, 1, 1, 1, 0 -}; - -#endif /* _CONTROL_FRAMEWORK_H_ not defined */ diff --git a/drivers/staging/unisys/common-spar/include/channels/diagchannel.h b/drivers/staging/unisys/common-spar/include/channels/diagchannel.h deleted file mode 100644 index e8fb8678a..000000000 --- a/drivers/staging/unisys/common-spar/include/channels/diagchannel.h +++ /dev/null @@ -1,427 +0,0 @@ -/* Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/*++ - * - * Module Name: - * - * diagchannel.h - * - * Abstract: - * - * This file defines the DiagChannel protocol. This protocol is used to aid in - * preserving event data sent by external applications. This protocol provides - * a region for event data to reside in. This data will eventually be sent to - * the Boot Partition where it will be committed to memory and/or disk. This - * file contains platform-independent data that can be built using any - * Supervisor build environment (Windows, Linux, EFI). - * -*/ - -#ifndef _DIAG_CHANNEL_H_ -#define _DIAG_CHANNEL_H_ - -#include <linux/uuid.h> -#include "channel.h" - -/* {EEA7A573-DB82-447c-8716-EFBEAAAE4858} */ -#define SPAR_DIAG_CHANNEL_PROTOCOL_UUID \ - UUID_LE(0xeea7a573, 0xdb82, 0x447c, \ - 0x87, 0x16, 0xef, 0xbe, 0xaa, 0xae, 0x48, 0x58) - -static const uuid_le spar_diag_channel_protocol_uuid = - SPAR_DIAG_CHANNEL_PROTOCOL_UUID; - -/* {E850F968-3263-4484-8CA5-2A35D087A5A8} */ -#define ULTRA_DIAG_ROOT_CHANNEL_PROTOCOL_GUID \ - UUID_LE(0xe850f968, 0x3263, 0x4484, \ - 0x8c, 0xa5, 0x2a, 0x35, 0xd0, 0x87, 0xa5, 0xa8) - -#define ULTRA_DIAG_CHANNEL_PROTOCOL_SIGNATURE ULTRA_CHANNEL_PROTOCOL_SIGNATURE - -/* Must increment this whenever you insert or delete fields within this channel -* struct. Also increment whenever you change the meaning of fields within this -* channel struct so as to break pre-existing software. Note that you can -* usually add fields to the END of the channel struct withOUT needing to -* increment this. */ -#define ULTRA_DIAG_CHANNEL_PROTOCOL_VERSIONID 2 - -#define SPAR_DIAG_CHANNEL_OK_CLIENT(ch)\ - (spar_check_channel_client(ch,\ - spar_diag_channel_protocol_uuid,\ - "diag",\ - sizeof(struct spar_diag_channel_protocol),\ - ULTRA_DIAG_CHANNEL_PROTOCOL_VERSIONID,\ - ULTRA_DIAG_CHANNEL_PROTOCOL_SIGNATURE)) - -#define SPAR_DIAG_CHANNEL_OK_SERVER(bytes)\ - (spar_check_channel_server(spar_diag_channel_protocol_uuid,\ - "diag",\ - sizeof(struct spar_diag_channel_protocol),\ - bytes)) - -#define MAX_MODULE_NAME_SIZE 128 /* Maximum length of module name... */ -#define MAX_ADDITIONAL_INFO_SIZE 256 /* Maximum length of any additional info - * accompanying event... */ -#define MAX_SUBSYSTEMS 64 /* Maximum number of subsystems allowed in - * DiagChannel... */ -#define LOW_SUBSYSTEMS 32 /* Half of MAX_SUBSYSTEMS to allow 64-bit - * math */ -#define SUBSYSTEM_DEBUG 0 /* Standard subsystem for debug events */ -#define SUBSYSTEM_DEFAULT 1 /* Default subsystem for legacy calls to - * ReportEvent */ - -/* few useful subsystem mask values */ -#define SUBSYSTEM_MASK_DEBUG 0x01 /* Standard subsystem for debug - * events */ -#define SUBSYSTEM_MASK_DEFAULT 0x02 /* Default subsystem for legacy calls to - * ReportEvents */ - -/* Event parameter "Severity" is overloaded with Cause in byte 2 and Severity in - * byte 0, bytes 1 and 3 are reserved */ -#define SEVERITY_MASK 0x0FF /* mask out all but the Severity in byte 0 */ -#define CAUSE_MASK 0x0FF0000 /* mask out all but the cause in byte 2 */ -#define CAUSE_SHIFT_AMT 16 /* shift 2 bytes to place it in byte 2 */ - -/* SubsystemSeverityFilter */ -#define SEVERITY_FILTER_MASK 0x0F /* mask out the Cause half, SeverityFilter is - * in the lower nibble */ -#define CAUSE_FILTER_MASK 0xF0 /* mask out the Severity half, CauseFilter is in - * the upper nibble */ -#define CAUSE_FILTER_SHIFT_AMT 4 /* shift amount to place it in lower or upper - * nibble */ - -/* Copied from EFI's EFI_TIME struct in efidef.h. EFI headers are not allowed -* in some of the Supervisor areas, such as Monitor, so it has been "ported" here -* for use in diagnostic event timestamps... */ -struct diag_efi_time { - u16 year; /* 1998 - 20XX */ - u8 month; /* 1 - 12 */ - u8 day; /* 1 - 31 */ - u8 hour; /* 0 - 23 */ - u8 minute; /* 0 - 59 */ - u8 second; /* 0 - 59 */ - u8 pad1; - u32 nanosecond; /* 0 - 999, 999, 999 */ - s16 timezone; /* -1440 to 1440 or 2047 */ - u8 daylight; - u8 pad2; -}; - -enum spar_component_types { - ULTRA_COMPONENT_GUEST = 0, - ULTRA_COMPONENT_MONITOR = 0x01, - ULTRA_COMPONENT_CCM = 0x02, /* Common Control module */ - /* RESERVED 0x03 - 0x7 */ - - /* Ultravisor Components */ - ULTRA_COMPONENT_BOOT = 0x08, - ULTRA_COMPONENT_IDLE = 0x09, - ULTRA_COMPONENT_CONTROL = 0x0A, - ULTRA_COMPONENT_LOGGER = 0x0B, - ULTRA_COMPONENT_ACPI = 0X0C, - /* RESERVED 0x0D - 0x0F */ - - /* sPAR Components */ - ULTRA_COMPONENT_COMMAND = 0x10, - ULTRA_COMPONENT_IODRIVER = 0x11, - ULTRA_COMPONENT_CONSOLE = 0x12, - ULTRA_COMPONENT_OPERATIONS = 0x13, - ULTRA_COMPONENT_MANAGEMENT = 0x14, - ULTRA_COMPONENT_DIAG = 0x15, - ULTRA_COMPONENT_HWDIAG = 0x16, - ULTRA_COMPONENT_PSERVICES = 0x17, - ULTRA_COMPONENT_PDIAG = 0x18 - /* RESERVED 0x18 - 0x1F */ -}; - -/* Structure: diag_channel_event Purpose: Contains attributes that make up an - * event to be written to the DIAG_CHANNEL memory. Attributes: EventId: Id of - * the diagnostic event to write to memory. Severity: Severity of the event - * (Error, Info, etc). ModuleName: Module/file name where event originated. - * LineNumber: Line number in module name where event originated. Timestamp: - * Date/time when event was received by ReportEvent, and written to DiagChannel. - * Reserved: Padding to align structure on a 64-byte cache line boundary. - * AdditionalInfo: Array of characters for additional event info (may be - * empty). */ -struct diag_channel_event { - u32 event_id; - u32 severity; - u8 module_name[MAX_MODULE_NAME_SIZE]; - u32 line_number; - struct diag_efi_time timestamp; /* Size = 16 bytes */ - u32 partition_number; /* Filled in by Diag Switch as pool blocks are - * filled */ - u16 vcpu_number; - u16 lcpu_number; - u8 component_type; /* ULTRA_COMPONENT_TYPES */ - u8 subsystem; - u16 reserved0; /* pad to u64 alignment */ - u32 block_no; /* filled in by DiagSwitch as pool blocks are - * filled */ - u32 block_no_high; - u32 event_no; /* filled in by DiagSwitch as pool blocks are - * filled */ - u32 event_no_high; - - /* The block_no and event_no fields are set only by DiagSwitch - * and referenced only by WinDiagDisplay formatting tool as - * additional diagnostic information. Other tools including - * WinDiagDisplay currently ignore these 'Reserved' bytes. */ - u8 reserved[8]; - u8 additional_info[MAX_ADDITIONAL_INFO_SIZE]; - - /* NOTE: Changes to diag_channel_event generally need to be reflected in - * existing copies * - * - for AppOS at - * GuestLinux/visordiag_early/supervisor_diagchannel.h * - * - for WinDiagDisplay at - * EFI/Ultra/Tools/WinDiagDisplay/WinDiagDisplay/diagstruct.h */ -}; - -/* Levels of severity for diagnostic events, in order from lowest severity to -* highest (i.e. fatal errors are the most severe, and should always be logged, -* but info events rarely need to be logged except during debugging). The values -* DIAG_SEVERITY_ENUM_BEGIN and DIAG_SEVERITY_ENUM_END are not valid severity -* values. They exist merely to dilineate the list, so that future additions -* won't require changes to the driver (i.e. when checking for out-of-range -* severities in SetSeverity). The values DIAG_SEVERITY_OVERRIDE and -* DIAG_SEVERITY_SHUTOFF are not valid severity values for logging events but -* they are valid for controlling the amount of event data. This enum is also -* defined in DotNet\sParFramework\ControlFramework\ControlFramework.cs. If a -* change is made to this enum, they should also be reflected in that file. */ -enum diag_severity { - DIAG_SEVERITY_ENUM_BEGIN = 0, - DIAG_SEVERITY_OVERRIDE = DIAG_SEVERITY_ENUM_BEGIN, - DIAG_SEVERITY_VERBOSE = DIAG_SEVERITY_OVERRIDE, /* 0 */ - DIAG_SEVERITY_INFO = DIAG_SEVERITY_VERBOSE + 1, /* 1 */ - DIAG_SEVERITY_WARNING = DIAG_SEVERITY_INFO + 1, /* 2 */ - DIAG_SEVERITY_ERR = DIAG_SEVERITY_WARNING + 1, /* 3 */ - DIAG_SEVERITY_PRINT = DIAG_SEVERITY_ERR + 1, /* 4 */ - DIAG_SEVERITY_SHUTOFF = DIAG_SEVERITY_PRINT + 1, /* 5 */ - DIAG_SEVERITY_ENUM_END = DIAG_SEVERITY_SHUTOFF, /* 5 */ - DIAG_SEVERITY_NONFATAL_ERR = DIAG_SEVERITY_ERR, - DIAG_SEVERITY_FATAL_ERR = DIAG_SEVERITY_PRINT -}; - -/* Event Cause enums -* -* Levels of cause for diagnostic events, in order from least to greatest cause -* Internal errors are most urgent since ideally they should never exist -* Invalid requests are preventable by avoiding invalid inputs -* Operations errors depend on environmental factors which may impact which -* requests are possible -* Manifest provides intermediate value to capture firmware and configuration -* version information -* Trace provides suplimental debug information in release firmware -* Unknown Log captures unclasified LogEvent calls. -* Debug is the least urgent since it provides suplimental debug information only -* in debug firmware -* Unknown Debug captures unclassified DebugEvent calls. -* This enum is also defined in -* DotNet\sParFramework\ControlFramework\ControlFramework.cs. -* If a change is made to this enum, they should also be reflected in that -* file. */ - -/* A cause value "DIAG_CAUSE_FILE_XFER" together with a severity value of -* "DIAG_SEVERITY_PRINT" (=4), is used for transferring text or binary file to -* the Diag partition. This cause-severity combination will be used by Logger -* DiagSwitch to segregate events into block types. The files are transferred in -* 256 byte chunks maximum, in the AdditionalInfo field of the diag_channel_event -* structure. In the file transfer mode, some event fields will have different -* meaning: EventId specifies the file offset, severity specifies the block type, -* ModuleName specifies the filename, LineNumber specifies the number of valid -* data bytes in an event and AdditionalInfo contains up to 256 bytes of data. */ - -/* The Diag DiagWriter appends event blocks to events.raw as today, and for data - * blocks uses diag_channel_event - * PartitionNumber to extract and append 'AdditionalInfo' to filename (specified - * by ModuleName). */ - -/* The Dell PDiag uses this new mechanism to stash DSET .zip onto the - * 'diagnostic' virtual disk. */ -enum diag_cause { - DIAG_CAUSE_UNKNOWN = 0, - DIAG_CAUSE_UNKNOWN_DEBUG = DIAG_CAUSE_UNKNOWN + 1, /* 1 */ - DIAG_CAUSE_DEBUG = DIAG_CAUSE_UNKNOWN_DEBUG + 1, /* 2 */ - DIAG_CAUSE_UNKNOWN_LOG = DIAG_CAUSE_DEBUG + 1, /* 3 */ - DIAG_CAUSE_TRACE = DIAG_CAUSE_UNKNOWN_LOG + 1, /* 4 */ - DIAG_CAUSE_MANIFEST = DIAG_CAUSE_TRACE + 1, /* 5 */ - DIAG_CAUSE_OPERATIONS_ERROR = DIAG_CAUSE_MANIFEST + 1, /* 6 */ - DIAG_CAUSE_INVALID_REQUEST = DIAG_CAUSE_OPERATIONS_ERROR + 1, /* 7 */ - DIAG_CAUSE_INTERNAL_ERROR = DIAG_CAUSE_INVALID_REQUEST + 1, /* 8 */ - DIAG_CAUSE_FILE_XFER = DIAG_CAUSE_INTERNAL_ERROR + 1, /* 9 */ - DIAG_CAUSE_ENUM_END = DIAG_CAUSE_FILE_XFER /* 9 */ -}; - -/* Event Cause category defined into the byte 2 of Severity */ -#define CAUSE_DEBUG (DIAG_CAUSE_DEBUG << CAUSE_SHIFT_AMT) -#define CAUSE_TRACE (DIAG_CAUSE_TRACE << CAUSE_SHIFT_AMT) -#define CAUSE_MANIFEST (DIAG_CAUSE_MANIFEST << CAUSE_SHIFT_AMT) -#define CAUSE_OPERATIONS_ERROR (DIAG_CAUSE_OPERATIONS_ERROR << CAUSE_SHIFT_AMT) -#define CAUSE_INVALID_REQUEST (DIAG_CAUSE_INVALID_REQUEST << CAUSE_SHIFT_AMT) -#define CAUSE_INTERNAL_ERROR (DIAG_CAUSE_INTERNAL_ERROR << CAUSE_SHIFT_AMT) -#define CAUSE_FILE_XFER (DIAG_CAUSE_FILE_XFER << CAUSE_SHIFT_AMT) -#define CAUSE_ENUM_END CAUSE_FILE_XFER - -/* Combine Cause and Severity categories into one */ -#define CAUSE_DEBUG_SEVERITY_VERBOSE \ - (CAUSE_DEBUG | DIAG_SEVERITY_VERBOSE) -#define CAUSE_TRACE_SEVERITY_VERBOSE \ - (CAUSE_TRACE | DIAG_SEVERITY_VERBOSE) -#define CAUSE_MANIFEST_SEVERITY_VERBOSE\ - (CAUSE_MANIFEST | DIAG_SEVERITY_VERBOSE) -#define CAUSE_OPERATIONS_SEVERITY_VERBOSE \ - (CAUSE_OPERATIONS_ERROR | DIAG_SEVERITY_VERBOSE) -#define CAUSE_INVALID_SEVERITY_VERBOSE \ - (CAUSE_INVALID_REQUEST | DIAG_SEVERITY_VERBOSE) -#define CAUSE_INTERNAL_SEVERITY_VERBOSE \ - (CAUSE_INTERNAL_ERROR | DIAG_SEVERITY_VERBOSE) - -#define CAUSE_DEBUG_SEVERITY_INFO \ - (CAUSE_DEBUG | DIAG_SEVERITY_INFO) -#define CAUSE_TRACE_SEVERITY_INFO \ - (CAUSE_TRACE | DIAG_SEVERITY_INFO) -#define CAUSE_MANIFEST_SEVERITY_INFO \ - (CAUSE_MANIFEST | DIAG_SEVERITY_INFO) -#define CAUSE_OPERATIONS_SEVERITY_INFO \ - (CAUSE_OPERATIONS_ERROR | DIAG_SEVERITY_INFO) -#define CAUSE_INVALID_SEVERITY_INFO \ - (CAUSE_INVALID_REQUEST | DIAG_SEVERITY_INFO) -#define CAUSE_INTERNAL_SEVERITY_INFO \ - (CAUSE_INTERNAL_ERROR | DIAG_SEVERITY_INFO) - -#define CAUSE_DEBUG_SEVERITY_WARN \ - (CAUSE_DEBUG | DIAG_SEVERITY_WARNING) -#define CAUSE_TRACE_SEVERITY_WARN \ - (CAUSE_TRACE | DIAG_SEVERITY_WARNING) -#define CAUSE_MANIFEST_SEVERITY_WARN \ - (CAUSE_MANIFEST | DIAG_SEVERITY_WARNING) -#define CAUSE_OPERATIONS_SEVERITY_WARN \ - (CAUSE_OPERATIONS_ERROR | DIAG_SEVERITY_WARNING) -#define CAUSE_INVALID_SEVERITY_WARN \ - (CAUSE_INVALID_REQUEST | DIAG_SEVERITY_WARNING) -#define CAUSE_INTERNAL_SEVERITY_WARN \ - (CAUSE_INTERNAL_ERROR | DIAG_SEVERITY_WARNING) - -#define CAUSE_DEBUG_SEVERITY_ERR \ - (CAUSE_DEBUG | DIAG_SEVERITY_ERR) -#define CAUSE_TRACE_SEVERITY_ERR \ - (CAUSE_TRACE | DIAG_SEVERITY_ERR) -#define CAUSE_MANIFEST_SEVERITY_ERR \ - (CAUSE_MANIFEST | DIAG_SEVERITY_ERR) -#define CAUSE_OPERATIONS_SEVERITY_ERR \ - (CAUSE_OPERATIONS_ERROR | DIAG_SEVERITY_ERR) -#define CAUSE_INVALID_SEVERITY_ERR \ - (CAUSE_INVALID_REQUEST | DIAG_SEVERITY_ERR) -#define CAUSE_INTERNAL_SEVERITY_ERR \ - (CAUSE_INTERNAL_ERROR | DIAG_SEVERITY_ERR) - -#define CAUSE_DEBUG_SEVERITY_PRINT \ - (CAUSE_DEBUG | DIAG_SEVERITY_PRINT) -#define CAUSE_TRACE_SEVERITY_PRINT \ - (CAUSE_TRACE | DIAG_SEVERITY_PRINT) -#define CAUSE_MANIFEST_SEVERITY_PRINT \ - (CAUSE_MANIFEST | DIAG_SEVERITY_PRINT) -#define CAUSE_OPERATIONS_SEVERITY_PRINT \ - (CAUSE_OPERATIONS_ERROR | DIAG_SEVERITY_PRINT) -#define CAUSE_INVALID_SEVERITY_PRINT \ - (CAUSE_INVALID_REQUEST | DIAG_SEVERITY_PRINT) -#define CAUSE_INTERNAL_SEVERITY_PRINT \ - (CAUSE_INTERNAL_ERROR | DIAG_SEVERITY_PRINT) -#define CAUSE_FILE_XFER_SEVERITY_PRINT \ - (CAUSE_FILE_XFER | DIAG_SEVERITY_PRINT) - -/* Structure: diag_channel_protocol_header - * - * Purpose: Contains attributes that make up the header specific to the - * DIAG_CHANNEL area. - * - * Attributes: - * - * DiagLock: Diag Channel spinlock. - * - *IsChannelInitialized: 1 iff SignalInit was called for this channel; otherwise - * 0, and assume the channel is not ready for use yet. - * - * Reserved: Padding to align the fields in this structure. - * - *SubsystemSeverityFilter: Level of severity on a subsystem basis that controls - * whether events are logged. Any event's severity for a - * particular subsystem below this level will be discarded. - */ -struct diag_channel_protocol_header { - u32 diag_lock; - u8 channel_initialized; - u8 reserved[3]; - u8 subsystem_severity_filter[64]; -}; - -/* The Diagram for the Diagnostic Channel: */ -/* ----------------------- */ -/* | Channel Header | Defined by ULTRA_CHANNEL_PROTOCOL */ -/* ----------------------- */ -/* | Signal Queue Header | Defined by SIGNAL_QUEUE_HEADER */ -/* ----------------------- */ -/* | DiagChannel Header | Defined by diag_channel_protocol_header */ -/* ----------------------- */ -/* | Channel Event Info | Defined by diag_channel_event*MAX_EVENTS */ -/* ----------------------- */ -/* | Reserved | Reserved (pad out to 4MB) */ -/* ----------------------- */ - -/* Offsets/sizes for diagnostic channel attributes... */ -#define DIAG_CH_QUEUE_HEADER_OFFSET (sizeof(struct channel_header)) -#define DIAG_CH_QUEUE_HEADER_SIZE (sizeof(struct signal_queue_header)) -#define DIAG_CH_PROTOCOL_HEADER_OFFSET \ - (DIAG_CH_QUEUE_HEADER_OFFSET + DIAG_CH_QUEUE_HEADER_SIZE) -#define DIAG_CH_PROTOCOL_HEADER_SIZE \ - (sizeof(struct diag_channel_protocol_header)) -#define DIAG_CH_EVENT_OFFSET \ - (DIAG_CH_PROTOCOL_HEADER_OFFSET + DIAG_CH_PROTOCOL_HEADER_SIZE) -#define DIAG_CH_SIZE (4096 * 1024) - -/* For Control and Idle Partitions with larger (8 MB) diagnostic(root) - * channels */ -#define DIAG_CH_LRG_SIZE (2 * DIAG_CH_SIZE) /* 8 MB */ - -/* - * Structure: spar_diag_channel_protocol - * - * Purpose: Contains attributes that make up the DIAG_CHANNEL memory. - * - * Attributes: - * - * CommonChannelHeader: Header info common to all channels. - * - * QueueHeader: Queue header common to all channels - used to determine where to - * store event. - * - * DiagChannelHeader: Diagnostic channel header info (see - * diag_channel_protocol_header comments). - * - * Events: Area where diagnostic events (up to MAX_EVENTS) are written. - * - *Reserved: Reserved area to allow for correct channel size padding. -*/ -struct spar_diag_channel_protocol { - struct channel_header common_channel_header; - struct signal_queue_header queue_header; - struct diag_channel_protocol_header diag_channel_header; - struct diag_channel_event events[(DIAG_CH_SIZE - DIAG_CH_EVENT_OFFSET) / - sizeof(struct diag_channel_event)]; -}; - -#endif diff --git a/drivers/staging/unisys/common-spar/include/diagnostics/appos_subsystems.h b/drivers/staging/unisys/common-spar/include/diagnostics/appos_subsystems.h deleted file mode 100644 index 18cc9ed27..000000000 --- a/drivers/staging/unisys/common-spar/include/diagnostics/appos_subsystems.h +++ /dev/null @@ -1,310 +0,0 @@ -/* Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* Please note that this file is to be used ONLY for defining diagnostic - * subsystem values for the appos (sPAR Linux service partitions) component. - */ -#ifndef __APPOS_SUBSYSTEMS_H__ -#define __APPOS_SUBSYSTEMS_H__ - -#ifdef __KERNEL__ -#include <linux/kernel.h> -#include <linux/string.h> -#else -#include <stdio.h> -#include <string.h> -#endif - -static inline char * -subsys_unknown_to_s(int subsys, char *s, int n) -{ - snprintf(s, n, "SUBSYS-%-2.2d", subsys); - s[n - 1] = '\0'; - return s; -} - -#define SUBSYS_TO_MASK(subsys) (1ULL << (subsys)) - -/* The first SUBSYS_APPOS_MAX subsystems are the same for each AppOS type - * (IOVM, SMS, etc.) The rest have unique values for each AppOS type. - */ -#define SUBSYS_APPOS_MAX 16 - -#define SUBSYS_APPOS_DEFAULT 1 /* or "other" */ -#define SUBSYS_APPOS_CHIPSET 2 /* controlvm and other */ - /* low-level sPAR activity */ -#define SUBSYS_APPOS_BUS 3 /* sPAR bus */ -/* DAK #define SUBSYS_APPOS_DIAG 4 // diagnostics and dump */ -#define SUBSYS_APPOS_CHANNELACCESS 5 /* generic channel access */ -#define SUBSYS_APPOS_NICCLIENT 6 /* virtual NIC client */ -#define SUBSYS_APPOS_HBACLIENT 7 /* virtual HBA client */ -#define SUBSYS_APPOS_CONSOLESERIAL 8 /* sPAR virtual serial console */ -#define SUBSYS_APPOS_UISLIB 9 /* */ -#define SUBSYS_APPOS_VRTCUPDD 10 /* */ -#define SUBSYS_APPOS_WATCHDOG 11 /* watchdog timer and healthcheck */ -#define SUBSYS_APPOS_13 13 /* available */ -#define SUBSYS_APPOS_14 14 /* available */ -#define SUBSYS_APPOS_15 15 /* available */ -#define SUBSYS_APPOS_16 16 /* available */ -static inline char * -subsys_generic_to_s(int subsys, char *s, int n) -{ - switch (subsys) { - case SUBSYS_APPOS_DEFAULT: - strncpy(s, "APPOS_DEFAULT", n); - break; - case SUBSYS_APPOS_CHIPSET: - strncpy(s, "APPOS_CHIPSET", n); - break; - case SUBSYS_APPOS_BUS: - strncpy(s, "APPOS_BUS", n); - break; - case SUBSYS_APPOS_CHANNELACCESS: - strncpy(s, "APPOS_CHANNELACCESS", n); - break; - case SUBSYS_APPOS_NICCLIENT: - strncpy(s, "APPOS_NICCLIENT", n); - break; - case SUBSYS_APPOS_HBACLIENT: - strncpy(s, "APPOS_HBACLIENT", n); - break; - case SUBSYS_APPOS_CONSOLESERIAL: - strncpy(s, "APPOS_CONSOLESERIAL", n); - break; - case SUBSYS_APPOS_UISLIB: - strncpy(s, "APPOS_UISLIB", n); - break; - case SUBSYS_APPOS_VRTCUPDD: - strncpy(s, "APPOS_VRTCUPDD", n); - break; - case SUBSYS_APPOS_WATCHDOG: - strncpy(s, "APPOS_WATCHDOG", n); - break; - case SUBSYS_APPOS_13: - strncpy(s, "APPOS_13", n); - break; - case SUBSYS_APPOS_14: - strncpy(s, "APPOS_14", n); - break; - case SUBSYS_APPOS_15: - strncpy(s, "APPOS_15", n); - break; - case SUBSYS_APPOS_16: - strncpy(s, "APPOS_16", n); - break; - default: - subsys_unknown_to_s(subsys, s, n); - break; - } - s[n - 1] = '\0'; - return s; -} - -/* CONSOLE */ - -#define SUBSYS_CONSOLE_VIDEO (SUBSYS_APPOS_MAX + 1) /* 17 */ -#define SUBSYS_CONSOLE_KBDMOU (SUBSYS_APPOS_MAX + 2) /* 18 */ -#define SUBSYS_CONSOLE_04 (SUBSYS_APPOS_MAX + 4) -#define SUBSYS_CONSOLE_05 (SUBSYS_APPOS_MAX + 5) -#define SUBSYS_CONSOLE_06 (SUBSYS_APPOS_MAX + 6) -#define SUBSYS_CONSOLE_07 (SUBSYS_APPOS_MAX + 7) -#define SUBSYS_CONSOLE_08 (SUBSYS_APPOS_MAX + 8) -#define SUBSYS_CONSOLE_09 (SUBSYS_APPOS_MAX + 9) -#define SUBSYS_CONSOLE_10 (SUBSYS_APPOS_MAX + 10) -#define SUBSYS_CONSOLE_11 (SUBSYS_APPOS_MAX + 11) -#define SUBSYS_CONSOLE_12 (SUBSYS_APPOS_MAX + 12) -#define SUBSYS_CONSOLE_13 (SUBSYS_APPOS_MAX + 13) -#define SUBSYS_CONSOLE_14 (SUBSYS_APPOS_MAX + 14) -#define SUBSYS_CONSOLE_15 (SUBSYS_APPOS_MAX + 15) -#define SUBSYS_CONSOLE_16 (SUBSYS_APPOS_MAX + 16) -#define SUBSYS_CONSOLE_17 (SUBSYS_APPOS_MAX + 17) -#define SUBSYS_CONSOLE_18 (SUBSYS_APPOS_MAX + 18) -#define SUBSYS_CONSOLE_19 (SUBSYS_APPOS_MAX + 19) -#define SUBSYS_CONSOLE_20 (SUBSYS_APPOS_MAX + 20) -#define SUBSYS_CONSOLE_21 (SUBSYS_APPOS_MAX + 21) -#define SUBSYS_CONSOLE_22 (SUBSYS_APPOS_MAX + 22) -#define SUBSYS_CONSOLE_23 (SUBSYS_APPOS_MAX + 23) -#define SUBSYS_CONSOLE_24 (SUBSYS_APPOS_MAX + 24) -#define SUBSYS_CONSOLE_25 (SUBSYS_APPOS_MAX + 25) -#define SUBSYS_CONSOLE_26 (SUBSYS_APPOS_MAX + 26) -#define SUBSYS_CONSOLE_27 (SUBSYS_APPOS_MAX + 27) -#define SUBSYS_CONSOLE_28 (SUBSYS_APPOS_MAX + 28) -#define SUBSYS_CONSOLE_29 (SUBSYS_APPOS_MAX + 29) -#define SUBSYS_CONSOLE_30 (SUBSYS_APPOS_MAX + 30) -#define SUBSYS_CONSOLE_31 (SUBSYS_APPOS_MAX + 31) -#define SUBSYS_CONSOLE_32 (SUBSYS_APPOS_MAX + 32) -#define SUBSYS_CONSOLE_33 (SUBSYS_APPOS_MAX + 33) -#define SUBSYS_CONSOLE_34 (SUBSYS_APPOS_MAX + 34) -#define SUBSYS_CONSOLE_35 (SUBSYS_APPOS_MAX + 35) -#define SUBSYS_CONSOLE_36 (SUBSYS_APPOS_MAX + 36) -#define SUBSYS_CONSOLE_37 (SUBSYS_APPOS_MAX + 37) -#define SUBSYS_CONSOLE_38 (SUBSYS_APPOS_MAX + 38) -#define SUBSYS_CONSOLE_39 (SUBSYS_APPOS_MAX + 39) -#define SUBSYS_CONSOLE_40 (SUBSYS_APPOS_MAX + 40) -#define SUBSYS_CONSOLE_41 (SUBSYS_APPOS_MAX + 41) -#define SUBSYS_CONSOLE_42 (SUBSYS_APPOS_MAX + 42) -#define SUBSYS_CONSOLE_43 (SUBSYS_APPOS_MAX + 43) -#define SUBSYS_CONSOLE_44 (SUBSYS_APPOS_MAX + 44) -#define SUBSYS_CONSOLE_45 (SUBSYS_APPOS_MAX + 45) -#define SUBSYS_CONSOLE_46 (SUBSYS_APPOS_MAX + 46) - -static inline char * -subsys_console_to_s(int subsys, char *s, int n) -{ - switch (subsys) { - case SUBSYS_CONSOLE_VIDEO: - strncpy(s, "CONSOLE_VIDEO", n); - break; - case SUBSYS_CONSOLE_KBDMOU: - strncpy(s, "CONSOLE_KBDMOU", n); - break; - case SUBSYS_CONSOLE_04: - strncpy(s, "CONSOLE_04", n); - break; - case SUBSYS_CONSOLE_05: - strncpy(s, "CONSOLE_05", n); - break; - case SUBSYS_CONSOLE_06: - strncpy(s, "CONSOLE_06", n); - break; - case SUBSYS_CONSOLE_07: - strncpy(s, "CONSOLE_07", n); - break; - case SUBSYS_CONSOLE_08: - strncpy(s, "CONSOLE_08", n); - break; - case SUBSYS_CONSOLE_09: - strncpy(s, "CONSOLE_09", n); - break; - case SUBSYS_CONSOLE_10: - strncpy(s, "CONSOLE_10", n); - break; - case SUBSYS_CONSOLE_11: - strncpy(s, "CONSOLE_11", n); - break; - case SUBSYS_CONSOLE_12: - strncpy(s, "CONSOLE_12", n); - break; - case SUBSYS_CONSOLE_13: - strncpy(s, "CONSOLE_13", n); - break; - case SUBSYS_CONSOLE_14: - strncpy(s, "CONSOLE_14", n); - break; - case SUBSYS_CONSOLE_15: - strncpy(s, "CONSOLE_15", n); - break; - case SUBSYS_CONSOLE_16: - strncpy(s, "CONSOLE_16", n); - break; - case SUBSYS_CONSOLE_17: - strncpy(s, "CONSOLE_17", n); - break; - case SUBSYS_CONSOLE_18: - strncpy(s, "CONSOLE_18", n); - break; - case SUBSYS_CONSOLE_19: - strncpy(s, "CONSOLE_19", n); - break; - case SUBSYS_CONSOLE_20: - strncpy(s, "CONSOLE_20", n); - break; - case SUBSYS_CONSOLE_21: - strncpy(s, "CONSOLE_21", n); - break; - case SUBSYS_CONSOLE_22: - strncpy(s, "CONSOLE_22", n); - break; - case SUBSYS_CONSOLE_23: - strncpy(s, "CONSOLE_23", n); - break; - case SUBSYS_CONSOLE_24: - strncpy(s, "CONSOLE_24", n); - break; - case SUBSYS_CONSOLE_25: - strncpy(s, "CONSOLE_25", n); - break; - case SUBSYS_CONSOLE_26: - strncpy(s, "CONSOLE_26", n); - break; - case SUBSYS_CONSOLE_27: - strncpy(s, "CONSOLE_27", n); - break; - case SUBSYS_CONSOLE_28: - strncpy(s, "CONSOLE_28", n); - break; - case SUBSYS_CONSOLE_29: - strncpy(s, "CONSOLE_29", n); - break; - case SUBSYS_CONSOLE_30: - strncpy(s, "CONSOLE_30", n); - break; - case SUBSYS_CONSOLE_31: - strncpy(s, "CONSOLE_31", n); - break; - case SUBSYS_CONSOLE_32: - strncpy(s, "CONSOLE_32", n); - break; - case SUBSYS_CONSOLE_33: - strncpy(s, "CONSOLE_33", n); - break; - case SUBSYS_CONSOLE_34: - strncpy(s, "CONSOLE_34", n); - break; - case SUBSYS_CONSOLE_35: - strncpy(s, "CONSOLE_35", n); - break; - case SUBSYS_CONSOLE_36: - strncpy(s, "CONSOLE_36", n); - break; - case SUBSYS_CONSOLE_37: - strncpy(s, "CONSOLE_37", n); - break; - case SUBSYS_CONSOLE_38: - strncpy(s, "CONSOLE_38", n); - break; - case SUBSYS_CONSOLE_39: - strncpy(s, "CONSOLE_39", n); - break; - case SUBSYS_CONSOLE_40: - strncpy(s, "CONSOLE_40", n); - break; - case SUBSYS_CONSOLE_41: - strncpy(s, "CONSOLE_41", n); - break; - case SUBSYS_CONSOLE_42: - strncpy(s, "CONSOLE_42", n); - break; - case SUBSYS_CONSOLE_43: - strncpy(s, "CONSOLE_43", n); - break; - case SUBSYS_CONSOLE_44: - strncpy(s, "CONSOLE_44", n); - break; - case SUBSYS_CONSOLE_45: - strncpy(s, "CONSOLE_45", n); - break; - case SUBSYS_CONSOLE_46: - strncpy(s, "CONSOLE_46", n); - break; - default: - subsys_unknown_to_s(subsys, s, n); - break; - } - s[n - 1] = '\0'; - return s; -} - -#endif diff --git a/drivers/staging/unisys/common-spar/include/channels/channel.h b/drivers/staging/unisys/include/channel.h index 6fb6e5b3d..da0b5387f 100644 --- a/drivers/staging/unisys/common-spar/include/channels/channel.h +++ b/drivers/staging/unisys/include/channel.h @@ -114,41 +114,6 @@ ULTRA_CHANNELCLI_STRING(u32 v) (((o) == CHANNELCLI_BUSY) && ((n) == CHANNELCLI_OWNED)) || (0)) \ ? (1) : (0)) -#define SPAR_CHANNEL_CLIENT_CHK_TRANSITION(old, new, id, log, \ - file, line) \ - do { \ - if (!ULTRA_VALID_CHANNELCLI_TRANSITION(old, new)) \ - pr_info("%s Channel StateTransition INVALID! (%s) %s(%d)-->%s(%d) @%s:%d\n", \ - id, "CliState<x>", \ - ULTRA_CHANNELCLI_STRING(old), \ - old, \ - ULTRA_CHANNELCLI_STRING(new), \ - new, \ - pathname_last_n_nodes((u8 *)file, 4), \ - line); \ - } while (0) - -#define SPAR_CHANNEL_CLIENT_TRANSITION(ch, id, newstate, log) \ - do { \ - SPAR_CHANNEL_CLIENT_CHK_TRANSITION( \ - readl(&(((struct channel_header __iomem *)\ - (ch))->cli_state_os)), \ - newstate, id, log, __FILE__, __LINE__); \ - pr_info("%s Channel StateTransition (%s) %s(%d)-->%s(%d) @%s:%d\n", \ - id, "CliStateOS", \ - ULTRA_CHANNELCLI_STRING( \ - readl(&((struct channel_header __iomem *)\ - (ch))->cli_state_os)), \ - readl(&((struct channel_header __iomem *)\ - (ch))->cli_state_os), \ - ULTRA_CHANNELCLI_STRING(newstate), \ - newstate, \ - pathname_last_n_nodes(__FILE__, 4), __LINE__); \ - writel(newstate, &((struct channel_header __iomem *)\ - (ch))->cli_state_os); \ - mb(); /* required for channel synch */ \ - } while (0) - /* Values for ULTRA_CHANNEL_PROTOCOL.CliErrorBoot: */ /* throttling invalid boot channel statetransition error due to client * disabled */ diff --git a/drivers/staging/unisys/common-spar/include/channels/channel_guid.h b/drivers/staging/unisys/include/channel_guid.h index 706363fc3..706363fc3 100644 --- a/drivers/staging/unisys/common-spar/include/channels/channel_guid.h +++ b/drivers/staging/unisys/include/channel_guid.h diff --git a/drivers/staging/unisys/include/diagchannel.h b/drivers/staging/unisys/include/diagchannel.h new file mode 100644 index 000000000..d2d35685d --- /dev/null +++ b/drivers/staging/unisys/include/diagchannel.h @@ -0,0 +1,43 @@ +/* Copyright (C) 2010 - 2013 UNISYS CORPORATION + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +#ifndef _DIAG_CHANNEL_H_ +#define _DIAG_CHANNEL_H_ + +#define MAX_MODULE_NAME_SIZE 128 /* Maximum length of module name... */ +#define MAX_ADDITIONAL_INFO_SIZE 256 /* Maximum length of any additional + * info accompanying event... + */ + +/* Levels of severity for diagnostic events, in order from lowest severity to + * highest (i.e. fatal errors are the most severe, and should always be logged, + * but info events rarely need to be logged except during debugging). The + * values DIAG_SEVERITY_ENUM_BEGIN and DIAG_SEVERITY_ENUM_END are not valid + * severity values. They exist merely to dilineate the list, so that future + * additions won't require changes to the driver (i.e. when checking for + * out-of-range severities in SetSeverity). The values DIAG_SEVERITY_OVERRIDE + * and DIAG_SEVERITY_SHUTOFF are not valid severity values for logging events + * but they are valid for controlling the amount of event data. Changes made + * to the enum, need to be reflected in s-Par. + */ +enum diag_severity { + DIAG_SEVERITY_VERBOSE = 0, + DIAG_SEVERITY_INFO = 1, + DIAG_SEVERITY_WARNING = 2, + DIAG_SEVERITY_ERR = 3, + DIAG_SEVERITY_PRINT = 4, +}; + +#endif diff --git a/drivers/staging/unisys/include/guestlinuxdebug.h b/drivers/staging/unisys/include/guestlinuxdebug.h index 957a627d0..82ee56539 100644 --- a/drivers/staging/unisys/include/guestlinuxdebug.h +++ b/drivers/staging/unisys/include/guestlinuxdebug.h @@ -22,7 +22,6 @@ * ISSUE_IO_VMCALL_POSTCODE_SEVERITY */ /******* INFO ON ISSUE_POSTCODE_LINUX() BELOW *******/ -#include "vmcallinterface.h" enum driver_pc { /* POSTCODE driver identifier tuples */ /* visorchipset driver files */ VISOR_CHIPSET_PC = 0xA0, @@ -135,7 +134,7 @@ enum event_pc { /* POSTCODE event identifier tuples */ #define POSTCODE_SEVERITY_ERR DIAG_SEVERITY_ERR #define POSTCODE_SEVERITY_WARNING DIAG_SEVERITY_WARNING #define POSTCODE_SEVERITY_INFO DIAG_SEVERITY_PRINT /* TODO-> Info currently - * doesnt show, so we + * doesn't show, so we * set info=warning */ /* example call of POSTCODE_LINUX_2(VISOR_CHIPSET_PC, POSTCODE_SEVERITY_ERR); * Please also note that the resulting postcode is in hex, so if you are diff --git a/drivers/staging/unisys/common-spar/include/channels/iochannel.h b/drivers/staging/unisys/include/iochannel.h index 3bd7579e1..a55981234 100644 --- a/drivers/staging/unisys/common-spar/include/channels/iochannel.h +++ b/drivers/staging/unisys/include/iochannel.h @@ -4,45 +4,34 @@ #define __IOCHANNEL_H__ /* -* Everything needed for IOPart-GuestPart communication is define in -* this file. Note: Everything is OS-independent because this file is -* used by Windows, Linux and possible EFI drivers. */ + * Everything needed for IOPart-GuestPart communication is define in + * this file. Note: Everything is OS-independent because this file is + * used by Windows, Linux and possible EFI drivers. */ /* -* Communication flow between the IOPart and GuestPart uses the channel headers -* channel state. The following states are currently being used: -* UNINIT(All Zeroes), CHANNEL_ATTACHING, CHANNEL_ATTACHED, CHANNEL_OPENED -* -* additional states will be used later. No locking is needed to switch between -* states due to the following rules: -* -* 1. IOPart is only the only partition allowed to change from UNIT -* 2. IOPart is only the only partition allowed to change from -* CHANNEL_ATTACHING -* 3. GuestPart is only the only partition allowed to change from -* CHANNEL_ATTACHED -* -* The state changes are the following: IOPart sees the channel is in UNINIT, -* UNINIT -> CHANNEL_ATTACHING (performed only by IOPart) -* CHANNEL_ATTACHING -> CHANNEL_ATTACHED (performed only by IOPart) -* CHANNEL_ATTACHED -> CHANNEL_OPENED (performed only by GuestPart) -*/ + * Communication flow between the IOPart and GuestPart uses the channel headers + * channel state. The following states are currently being used: + * UNINIT(All Zeroes), CHANNEL_ATTACHING, CHANNEL_ATTACHED, CHANNEL_OPENED + * + * additional states will be used later. No locking is needed to switch between + * states due to the following rules: + * + * 1. IOPart is only the only partition allowed to change from UNIT + * 2. IOPart is only the only partition allowed to change from + * CHANNEL_ATTACHING + * 3. GuestPart is only the only partition allowed to change from + * CHANNEL_ATTACHED + * + * The state changes are the following: IOPart sees the channel is in UNINIT, + * UNINIT -> CHANNEL_ATTACHING (performed only by IOPart) + * CHANNEL_ATTACHING -> CHANNEL_ATTACHED (performed only by IOPart) + * CHANNEL_ATTACHED -> CHANNEL_OPENED (performed only by GuestPart) + */ #include <linux/uuid.h> -#include "vmcallinterface.h" - -#define _ULTRA_CONTROLVM_CHANNEL_INLINE_ #include <linux/dma-direction.h> -#include "controlvmchannel.h" -#include "vbuschannel.h" -#undef _ULTRA_CONTROLVM_CHANNEL_INLINE_ #include "channel.h" - -/* - * CHANNEL Guids - */ - #include "channel_guid.h" #define ULTRA_VHBA_CHANNEL_PROTOCOL_SIGNATURE ULTRA_CHANNEL_PROTOCOL_SIGNATURE @@ -51,10 +40,11 @@ ULTRA_CHANNEL_PROTOCOL_SIGNATURE /* Must increment these whenever you insert or delete fields within this channel -* struct. Also increment whenever you change the meaning of fields within this -* channel struct so as to break pre-existing software. Note that you can -* usually add fields to the END of the channel struct withOUT needing to -* increment this. */ + * struct. Also increment whenever you change the meaning of fields within this + * channel struct so as to break pre-existing software. Note that you can + * usually add fields to the END of the channel struct withOUT needing to + * increment this. + */ #define ULTRA_VHBA_CHANNEL_PROTOCOL_VERSIONID 2 #define ULTRA_VNIC_CHANNEL_PROTOCOL_VERSIONID 2 #define ULTRA_VSWITCH_CHANNEL_PROTOCOL_VERSIONID 1 @@ -72,55 +62,26 @@ ULTRA_VNIC_CHANNEL_PROTOCOL_SIGNATURE)) /* -* Everything necessary to handle SCSI & NIC traffic between Guest Partition and -* IO Partition is defined below. */ + * Everything necessary to handle SCSI & NIC traffic between Guest Partition and + * IO Partition is defined below. + */ /* -* Defines and enums. -*/ + * Defines and enums. + */ #define MINNUM(a, b) (((a) < (b)) ? (a) : (b)) #define MAXNUM(a, b) (((a) > (b)) ? (a) : (b)) /* these define the two queues per data channel between iopart and - * ioguestparts */ + * ioguestparts + */ #define IOCHAN_TO_IOPART 0 /* used by ioguestpart to 'insert' signals to * iopart */ -#define IOCHAN_FROM_GUESTPART 0 /* used by iopart to 'remove' signals from - * ioguestpart - same queue as previous queue */ -#define IOCHAN_TO_GUESTPART 1 /* used by iopart to 'insert' signals to - * ioguestpart */ #define IOCHAN_FROM_IOPART 1 /* used by ioguestpart to 'remove' signals from * iopart - same queue as previous queue */ -/* these define the two queues per control channel between controlpart and "its" - * guests, which includes the iopart */ -#define CTRLCHAN_TO_CTRLGUESTPART 0 /* used by ctrlguestpart to 'insert' signals - * to ctrlpart */ -#define CTLRCHAN_FROM_CTRLPART 0 /* used by ctrlpart to 'remove' signals from - * ctrlquestpart - same queue as previous - * queue */ - -#define CTRLCHAN_TO_CTRLPART 1 /* used by ctrlpart to 'insert' signals to - * ctrlguestpart */ -#define CTRLCHAN_FROM_CTRLGUESTPART 1 /* used by ctrguestpart to 'remove' - * signals from ctrlpart - same queue as - * previous queue */ - -/* these define the Event & Ack queues per control channel Events are generated -* by CTRLGUESTPART and sent to CTRLPART; Acks are generated by CTRLPART and sent -* to CTRLGUESTPART. */ -#define CTRLCHAN_EVENT_TO_CTRLPART 2 /* used by ctrlguestpart to 'insert' Events - * to ctrlpart */ -#define CTRLCHAN_EVENT_FROM_CTRLGUESTPART 2 /* used by ctrlpart to 'remove' - * Events from ctrlguestpart */ - -#define CTRLCHAN_ACK_TO_CTRLGUESTPART 3 /* used by ctrlpart to 'insert' Acks to - * ctrlguestpart */ -#define CTRLCHAN_ACK_FROM_CTRLPART 3 /* used by ctrlguestpart to 'remove' Events - * from ctrlpart */ - /* size of cdb - i.e., scsi cmnd */ #define MAX_CMND_SIZE 16 @@ -128,28 +89,6 @@ #define MAX_PHYS_INFO 64 -/* Because GuestToGuestCopy is limited to 4KiB segments, and we have limited the -* Emulex Driver to 256 scatter list segments via the lpfc_sg_seg_cnt parameter -* to 256, the maximum I/O size is limited to 256 * 4 KiB = 1 MB */ -#define MAX_IO_SIZE (1024*1024) /* 1 MB */ - -/* NOTE 1: lpfc defines its support for segments in -* #define LPFC_SG_SEG_CNT 64 -* -* NOTE 2: In Linux, frags array in skb is currently allocated to be -* MAX_SKB_FRAGS size, which is 18 which is smaller than MAX_PHYS_INFO for -* now. */ - -#ifndef MAX_SERIAL_NUM -#define MAX_SERIAL_NUM 32 -#endif /* MAX_SERIAL_NUM */ - -#define MAX_SCSI_BUSES 1 -#define MAX_SCSI_TARGETS 8 -#define MAX_SCSI_LUNS 16 -#define MAX_SCSI_FROM_HOST 0xFFFFFFFF /* Indicator to use Physical HBA - * SCSI Host value */ - /* various types of network packets that can be sent in cmdrsp */ enum net_types { NET_RCV_POST = 0, /* submit buffer to hold receiving @@ -173,7 +112,7 @@ enum net_types { /* uisnic -> virtnic */ NET_MACADDR, /* indicates the client has requested to update * its MAC addr */ - NET_MACADDR_ACK, /* MAC address */ + NET_MACADDR_ACK, /* MAC address */ }; @@ -182,19 +121,12 @@ enum net_types { #define ETH_MIN_DATA_SIZE 46 /* minimum eth data size */ #define ETH_MIN_PACKET_SIZE (ETH_HEADER_SIZE + ETH_MIN_DATA_SIZE) -#define ETH_DEF_DATA_SIZE 1500 /* default data size */ -#define ETH_DEF_PACKET_SIZE (ETH_HEADER_SIZE + ETH_DEF_DATA_SIZE) - #define ETH_MAX_MTU 16384 /* maximum data size */ #ifndef MAX_MACADDR_LEN #define MAX_MACADDR_LEN 6 /* number of bytes in MAC address */ #endif /* MAX_MACADDR_LEN */ -#define ETH_IS_LOCALLY_ADMINISTERED(address) \ - (((u8 *)(address))[0] & ((u8)0x02)) -#define NIC_VENDOR_ID 0x0008000B - /* various types of scsi task mgmt commands */ enum task_mgmt_types { TASK_MGMT_ABORT_TASK = 1, @@ -209,32 +141,16 @@ enum vdisk_mgmt_types { VDISK_MGMT_RELEASE, }; -/* this is used in the vdest field */ -#define VDEST_ALL 0xFFFF - -#define MIN_NUMSIGNALS 64 -#define MAX_NUMSIGNALS 4096 - -/* MAX_NET_RCV_BUF specifies the number of rcv buffers that are created by each -* guest's virtnic and posted to uisnic. Uisnic, for each channel, keeps the rcv -* buffers posted and uses them to receive data on behalf of the guest's virtnic. -* NOTE: the num_rcv_bufs is configurable for each VNIC. So the following is -* simply an upperlimit on what each VNIC can provide. Setting it to half of the -* NUMSIGNALS to prevent queue full deadlocks */ -#define MAX_NET_RCV_BUFS (MIN_NUMSIGNALS / 2) - -/* - * structs with pragma pack */ - -/* ///////////// BEGIN PRAGMA PACK PUSH 1 ///////////////////////// */ -/* ///////////// ONLY STRUCT TYPE SHOULD BE BELOW */ - -#pragma pack(push, 1) +struct phys_info { + u64 pi_pfn; + u16 pi_off; + u16 pi_len; +} __packed; struct guest_phys_info { u64 address; u64 length; -}; +} __packed; #define GPI_ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(struct guest_phys_info)) @@ -242,12 +158,12 @@ struct uisscsi_dest { u32 channel; /* channel == bus number */ u32 id; /* id == target number */ u32 lun; /* lun == logical unit number */ -}; +} __packed; struct vhba_wwnn { u32 wwnn1; u32 wwnn2; -}; +} __packed; /* WARNING: Values stired in this structure must contain maximum counts (not * maximum values). */ @@ -264,7 +180,7 @@ struct vhba_config_max { /* 20 bytes */ * bus */ /* max io size is often determined by the resource of the hba. e.g */ /* max scatter gather list length * page size / sector size */ -}; +} __packed; struct uiscmdrsp_scsi { void *scsicmd; /* the handle to the cmd that was received - @@ -287,13 +203,7 @@ struct uiscmdrsp_scsi { u8 scsistat; /* the scsi status */ u8 addlstat; /* non-scsi status - covers cases like timeout * needed by windows guests */ -#define ADDL_RESET 1 -#define ADDL_TIMEOUT 2 -#define ADDL_INTERNAL_ERROR 3 #define ADDL_SEL_TIMEOUT 4 -#define ADDL_CMD_TIMEOUT 5 -#define ADDL_BAD_TARGET 6 -#define ADDL_RETRY 7 /* the following fields are need to determine the result of command */ u8 sensebuf[MAX_SENSE_SIZE]; /* sense info in case cmd failed; */ @@ -301,17 +211,19 @@ struct uiscmdrsp_scsi { /* see that struct for details. */ void *vdisk; /* contains pointer to the vdisk so that we can clean up * when the IO completes. */ - int no_disk_result; /* used to return no disk inquiry result */ - /* when no_disk_result is set to 1, */ - /* scsi.scsistat is SAM_STAT_GOOD */ - /* scsi.addlstat is 0 */ - /* scsi.linuxstat is SAM_STAT_GOOD */ - /* That is, there is NO error. */ -}; - -/* -* Defines to support sending correct inquiry result when no disk is -* configured. */ + int no_disk_result; + /* used to return no disk inquiry result + * when no_disk_result is set to 1, + * scsi.scsistat is SAM_STAT_GOOD + * scsi.addlstat is 0 + * scsi.linuxstat is SAM_STAT_GOOD + * That is, there is NO error. + */ +} __packed; + +/* Defines to support sending correct inquiry result when no disk is + * configured. + */ /* From SCSI SPC2 - * @@ -324,26 +236,22 @@ struct uiscmdrsp_scsi { *connected to this logical unit. */ -#define DEV_NOT_PRESENT 0x7f /* old name - compatibility */ #define DEV_NOT_CAPABLE 0x7f /* peripheral qualifier of 0x3 */ - /* peripheral type of 0x1f */ - /* specifies no device but target present */ + /* peripheral type of 0x1f */ + /* specifies no device but target present */ #define DEV_DISK_CAPABLE_NOT_PRESENT 0x20 /* peripheral qualifier of 0x1 */ /* peripheral type of 0 - disk */ /* specifies device capable, but not present */ -#define DEV_PROC_CAPABLE_NOT_PRESENT 0x23 /* peripheral qualifier of 0x1 */ - /* peripheral type of 3 - processor */ - /* specifies device capable, but not present */ - #define DEV_HISUPPORT 0x10 /* HiSup = 1; shows support for report luns */ - /* must be returned for lun 0. */ + /* must be returned for lun 0. */ /* NOTE: Linux code assumes inquiry contains 36 bytes. Without checking length -* in buf[4] some linux code accesses bytes beyond 5 to retrieve vendor, product -* & revision. Yikes! So let us always send back 36 bytes, the minimum for -* inquiry result. */ + * in buf[4] some linux code accesses bytes beyond 5 to retrieve vendor, product + * & revision. Yikes! So let us always send back 36 bytes, the minimum for + * inquiry result. + */ #define NO_DISK_INQUIRY_RESULT_LEN 36 #define MIN_INQUIRY_RESULT_LEN 5 /* we need at least 5 bytes minimum for inquiry @@ -394,21 +302,21 @@ struct uiscmdrsp_scsi { } while (0) /* -* Struct & Defines to support sense information. -*/ + * Struct & Defines to support sense information. + */ /* The following struct is returned in sensebuf field in uiscmdrsp_scsi. It is -* initialized in exactly the manner that is recommended in Windows (hence the -* odd values). -* When set, these fields will have the following values: -* ErrorCode = 0x70 indicates current error -* Valid = 1 indicates sense info is valid -* SenseKey contains sense key as defined by SCSI specs. -* AdditionalSenseCode contains sense key as defined by SCSI specs. -* AdditionalSenseCodeQualifier contains qualifier to sense code as defined by -* scsi docs. -* AdditionalSenseLength contains will be sizeof(sense_data)-8=10. -*/ + * initialized in exactly the manner that is recommended in Windows (hence the + * odd values). + * When set, these fields will have the following values: + * ErrorCode = 0x70 indicates current error + * Valid = 1 indicates sense info is valid + * SenseKey contains sense key as defined by SCSI specs. + * AdditionalSenseCode contains sense key as defined by SCSI specs. + * AdditionalSenseCodeQualifier contains qualifier to sense code as defined by + * scsi docs. + * AdditionalSenseLength contains will be sizeof(sense_data)-8=10. + */ struct sense_data { u8 errorcode:7; u8 valid:1; @@ -425,38 +333,7 @@ struct sense_data { u8 additional_sense_code_qualifier; u8 fru_code; u8 sense_key_specific[3]; -}; - -/* some SCSI ADSENSE codes */ -#ifndef SCSI_ADSENSE_LUN_NOT_READY -#define SCSI_ADSENSE_LUN_NOT_READY 0x04 -#endif /* */ -#ifndef SCSI_ADSENSE_ILLEGAL_COMMAND -#define SCSI_ADSENSE_ILLEGAL_COMMAND 0x20 -#endif /* */ -#ifndef SCSI_ADSENSE_ILLEGAL_BLOCK -#endif /* */ -#ifndef SCSI_ADSENSE_ILLEGAL_BLOCK -#define SCSI_ADSENSE_ILLEGAL_BLOCK 0x21 -#endif /* */ -#ifndef SCSI_ADSENSE_INVALID_CDB -#define SCSI_ADSENSE_INVALID_CDB 0x24 -#endif /* */ -#ifndef SCSI_ADSENSE_INVALID_LUN -#define SCSI_ADSENSE_INVALID_LUN 0x25 -#endif /* */ -#ifndef SCSI_ADWRITE_PROTECT -#define SCSI_ADWRITE_PROTECT 0x27 -#endif /* */ -#ifndef SCSI_ADSENSE_MEDIUM_CHANGED -#define SCSI_ADSENSE_MEDIUM_CHANGED 0x28 -#endif /* */ -#ifndef SCSI_ADSENSE_BUS_RESET -#define SCSI_ADSENSE_BUS_RESET 0x29 -#endif /* */ -#ifndef SCSI_ADSENSE_NO_MEDIA_IN_DEVICE -#define SCSI_ADSENSE_NO_MEDIA_IN_DEVICE 0x3a -#endif /* */ +} __packed; struct net_pkt_xmt { int len; /* full length of data in the packet */ @@ -484,34 +361,33 @@ struct net_pkt_xmt { * guest memory to get to the header. uisnic needs ethhdr to * determine how to route the packet. */ -}; +} __packed; struct net_pkt_xmtdone { u32 xmt_done_result; /* result of NET_XMIT */ -#define XMIT_SUCCESS 0 -#define XMIT_FAILED 1 -}; +} __packed; /* RCVPOST_BUF_SIZe must be at most page_size(4096) - cache_line_size (64) The -* reason is because dev_skb_alloc which is used to generate RCV_POST skbs in -* virtnic requires that there is "overhead" in the buffer, and pads 16 bytes. I -* prefer to use 1 full cache line size for "overhead" so that transfers are -* better. IOVM requires that a buffer be represented by 1 phys_info structure -* which can only cover page_size. */ + * reason is because dev_skb_alloc which is used to generate RCV_POST skbs in + * virtnic requires that there is "overhead" in the buffer, and pads 16 bytes. I + * prefer to use 1 full cache line size for "overhead" so that transfers are + * better. IOVM requires that a buffer be represented by 1 phys_info structure + * which can only cover page_size. + */ #define RCVPOST_BUF_SIZE 4032 #define MAX_NET_RCV_CHAIN \ ((ETH_MAX_MTU+ETH_HEADER_SIZE + RCVPOST_BUF_SIZE-1) / RCVPOST_BUF_SIZE) struct net_pkt_rcvpost { /* rcv buf size must be large enough to include ethernet data len + - * ethernet header len - we are choosing 2K because it is guaranteed - * to be describable */ + * ethernet header len - we are choosing 2K because it is guaranteed + * to be describable */ struct phys_info frag; /* physical page information for the * single fragment 2K rcv buf */ u64 unique_num; /* This is used to make sure that * receive posts are returned to */ - /* the Adapter which sent them origonally. */ -}; + /* the Adapter which we sent them originally. */ +} __packed; struct net_pkt_rcv { /* the number of receive buffers that can be chained */ @@ -525,34 +401,34 @@ struct net_pkt_rcv { /* NOTE: first rcvbuf in the chain will also be provided in net.buf. */ u64 unique_num; u32 rcvs_dropped_delta; -}; +} __packed; struct net_pkt_enbdis { void *context; u16 enable; /* 1 = enable, 0 = disable */ -}; +} __packed; struct net_pkt_macaddr { void *context; u8 macaddr[MAX_MACADDR_LEN]; /* 6 bytes */ -}; +} __packed; /* cmd rsp packet used for VNIC network traffic */ struct uiscmdrsp_net { enum net_types type; void *buf; union { - struct net_pkt_xmt xmt; /* used for NET_XMIT */ + struct net_pkt_xmt xmt; /* used for NET_XMIT */ struct net_pkt_xmtdone xmtdone; /* used for NET_XMIT_DONE */ struct net_pkt_rcvpost rcvpost; /* used for NET_RCV_POST */ - struct net_pkt_rcv rcv; /* used for NET_RCV */ + struct net_pkt_rcv rcv; /* used for NET_RCV */ struct net_pkt_enbdis enbdis; /* used for NET_RCV_ENBDIS, */ - /* NET_RCV_ENBDIS_ACK, */ - /* NET_RCV_PROMSIC, */ - /* and NET_CONNECT_STATUS */ + /* NET_RCV_ENBDIS_ACK, */ + /* NET_RCV_PROMSIC, */ + /* and NET_CONNECT_STATUS */ struct net_pkt_macaddr macaddr; }; -}; +} __packed; struct uiscmdrsp_scsitaskmgmt { enum task_mgmt_types tasktype; @@ -564,43 +440,45 @@ struct uiscmdrsp_scsitaskmgmt { void *scsicmd; /* This is some handle that the guest has saved off for its own use. - * Its value is preserved by iopart & returned as is in the task mgmt - * rsp. */ + * Its value is preserved by iopart & returned as is in the task + * mgmt rsp. + */ void *notify; - /* For linux guests, this is a pointer to wait_queue_head that a + /* For linux guests, this is a pointer to wait_queue_head that a * thread is waiting on to see if the taskmgmt command has completed. * For windows guests, this is a pointer to a location that a waiting * thread is testing to see if the taskmgmt command has completed. * When the rsp is received by guest, the thread receiving the * response uses this to notify the thread waiting for taskmgmt * command completion. Its value is preserved by iopart & returned - * as is in the task mgmt rsp. */ + * as is in the task mgmt rsp. + */ void *notifyresult; /* this is a handle to location in guest where the result of the - * taskmgmt command (result field) is to saved off when the response - * is handled. Its value is preserved by iopart & returned as is in - * the task mgmt rsp. */ + * taskmgmt command (result field) is to saved off when the response + * is handled. Its value is preserved by iopart & returned as is in + * the task mgmt rsp. + */ char result; /* result of taskmgmt command - set by IOPart - values are: */ #define TASK_MGMT_FAILED 0 -#define TASK_MGMT_SUCCESS 1 -}; +} __packed; /* The following is used by uissd to send disk add/remove notifications to * Guest */ /* Note that the vHba pointer is not used by the Client/Guest side. */ struct uiscmdrsp_disknotify { - u8 add; /* 0-remove, 1-add */ + u8 add; /* 0-remove, 1-add */ void *v_hba; /* Pointer to vhba_info for channel info to * route msg */ u32 channel, id, lun; /* SCSI Path of Disk to added or removed */ -}; +} __packed; /* The following is used by virthba/vSCSI to send the Acquire/Release commands -* to the IOVM. */ + * to the IOVM. */ struct uiscmdrsp_vdiskmgmt { enum vdisk_mgmt_types vdisktype; @@ -611,36 +489,38 @@ struct uiscmdrsp_vdiskmgmt { void *scsicmd; /* This is some handle that the guest has saved off for its own use. - * Its value is preserved by iopart & returned as is in the task mgmt - * rsp. */ + * Its value is preserved by iopart & returned as is in the task + * mgmt rsp. + */ void *notify; /* For linux guests, this is a pointer to wait_queue_head that a - * thread is waiting on to see if the taskmgmt command has completed. - * For windows guests, this is a pointer to a location that a waiting - * thread is testing to see if the taskmgmt command has completed. - * When the rsp is received by guest, the thread receiving the - * response uses this to notify the thread waiting for taskmgmt - * command completion. Its value is preserved by iopart & returned - * as is in the task mgmt rsp. */ + * thread is waiting on to see if the tskmgmt command has completed. + * For win32 guests, this is a pointer to a location that a waiting + * thread is testing to see if the taskmgmt command has completed. + * When the rsp is received by guest, the thread receiving the + * response uses this to notify the thread waiting for taskmgmt + * command completion. Its value is preserved by iopart & returned + * as is in the task mgmt rsp. + */ void *notifyresult; /* this is a handle to location in guest where the result of the - * taskmgmt command (result field) is to saved off when the response - * is handled. Its value is preserved by iopart & returned as is in - * the task mgmt rsp. */ + * taskmgmt command (result field) is to saved off when the response + * is handled. Its value is preserved by iopart & returned as is in + * the task mgmt rsp. + */ char result; /* result of taskmgmt command - set by IOPart - values are: */ #define VDISK_MGMT_FAILED 0 -#define VDISK_MGMT_SUCCESS 1 -}; +} __packed; /* keeping cmd & rsp info in one structure for now cmd rsp packet for scsi */ struct uiscmdrsp { char cmdtype; - /* describes what type of information is in the struct */ +/* describes what type of information is in the struct */ #define CMD_SCSI_TYPE 1 #define CMD_NET_TYPE 2 #define CMD_SCSITASKMGMT_TYPE 3 @@ -654,63 +534,44 @@ struct uiscmdrsp { struct uiscmdrsp_vdiskmgmt vdiskmgmt; }; void *private_data; /* used to send the response when the cmd is - * done (scsi & scsittaskmgmt). */ + * done (scsi & scsittaskmgmt). */ struct uiscmdrsp *next; /* General Purpose Queue Link */ struct uiscmdrsp *activeQ_next; /* Used to track active commands */ - struct uiscmdrsp *activeQ_prev; /* Used to track active commands */ -}; - + struct uiscmdrsp *activeQ_prev; /* Used to track active commands */ +} __packed; + +struct iochannel_vhba { + struct vhba_wwnn wwnn; /* 8 bytes */ + struct vhba_config_max max; /* 20 bytes */ +} __packed; /* total = 28 bytes */ +struct iochannel_vnic { + u8 macaddr[6]; /* 6 bytes */ + u32 num_rcv_bufs; /* 4 bytes */ + u32 mtu; /* 4 bytes */ + uuid_le zone_uuid; /* 16 bytes */ +} __packed; /* This is just the header of the IO channel. It is assumed that directly after -* this header there is a large region of memory which contains the command and -* response queues as specified in cmd_q and rsp_q SIGNAL_QUEUE_HEADERS. */ + * this header there is a large region of memory which contains the command and + * response queues as specified in cmd_q and rsp_q SIGNAL_QUEUE_HEADERS. + */ struct spar_io_channel_protocol { struct channel_header channel_header; struct signal_queue_header cmd_q; struct signal_queue_header rsp_q; union { - struct { - struct vhba_wwnn wwnn; /* 8 bytes */ - struct vhba_config_max max; /* 20 bytes */ - } vhba; /* 28 */ - struct { - u8 macaddr[MAX_MACADDR_LEN]; /* 6 bytes */ - u32 num_rcv_bufs; /* 4 */ - u32 mtu; /* 4 */ - uuid_le zone_uuid; /* 16 */ - } vnic; /* total 30 */ - }; + struct iochannel_vhba vhba; + struct iochannel_vnic vnic; + } __packed; #define MAX_CLIENTSTRING_LEN 1024 u8 client_string[MAX_CLIENTSTRING_LEN];/* NULL terminated - so holds * max - 1 bytes */ -}; +} __packed; -#pragma pack(pop) -/* ///////////// END PRAGMA PACK PUSH 1 /////////////////////////// */ - -/* define offsets to members of struct uiscmdrsp */ -#define OFFSET_CMDTYPE offsetof(struct uiscmdrsp, cmdtype) -#define OFFSET_SCSI offsetof(struct uiscmdrsp, scsi) -#define OFFSET_NET offsetof(struct uiscmdrsp, net) -#define OFFSET_SCSITASKMGMT offsetof(struct uiscmdrsp, scsitaskmgmt) -#define OFFSET_NEXT offsetof(struct uiscmdrsp, next) - -/* define offsets to members of struct uiscmdrsp_net */ -#define OFFSET_TYPE offsetof(struct uiscmdrsp_net, type) -#define OFFSET_BUF offsetof(struct uiscmdrsp_net, buf) -#define OFFSET_XMT offsetof(struct uiscmdrsp_net, xmt) -#define OFFSET_XMT_DONE_RESULT offsetof(struct uiscmdrsp_net, xmtdone) -#define OFFSET_RCVPOST offsetof(struct uiscmdrsp_net, rcvpost) -#define OFFSET_RCV_DONE_LEN offsetof(struct uiscmdrsp_net, rcv) -#define OFFSET_ENBDIS offsetof(struct uiscmdrsp_net, enbdis) - -/* define offsets to members of struct net_pkt_rcvpost */ -#define OFFSET_TOTALLEN offsetof(struct net_pkt_rcvpost, totallen) -#define OFFSET_FRAG offsetof(struct net_pkt_rcvpost, frag) /* -* INLINE functions for initializing and accessing I/O data channels -*/ + * INLINE functions for initializing and accessing I/O data channels + */ #define SIZEOF_PROTOCOL (COVER(sizeof(struct spar_io_channel_protocol), 64)) #define SIZEOF_CMDRSP (COVER(sizeof(struct uiscmdrsp), 64)) @@ -719,16 +580,15 @@ struct spar_io_channel_protocol { 2 * MIN_NUMSIGNALS * SIZEOF_CMDRSP, 4096) /* -* INLINE function for expanding a guest's pfn-off-size into multiple 4K page -* pfn-off-size entires. -*/ + * INLINE function for expanding a guest's pfn-off-size into multiple 4K page + * pfn-off-size entires. + */ /* we deal with 4K page sizes when we it comes to passing page information * between */ /* Guest and IOPartition. */ #define PI_PAGE_SIZE 0x1000 #define PI_PAGE_MASK 0x0FFF -#define PI_PAGE_SHIFT 12 /* returns next non-zero index on success or zero on failure (i.e. out of * room) diff --git a/drivers/staging/unisys/include/periodic_work.h b/drivers/staging/unisys/include/periodic_work.h index 26ec10bdf..4e19c28dc 100644 --- a/drivers/staging/unisys/include/periodic_work.h +++ b/drivers/staging/unisys/include/periodic_work.h @@ -18,7 +18,9 @@ #ifndef __PERIODIC_WORK_H__ #define __PERIODIC_WORK_H__ -#include "timskmod.h" +#include <linux/seq_file.h> +#include <linux/slab.h> + /* PERIODIC_WORK an opaque structure to users. * Fields are declared only in the implementation .c files. @@ -31,8 +33,8 @@ struct periodic_work *visor_periodic_work_create(ulong jiffy_interval, void *workfuncarg, const char *devnam); void visor_periodic_work_destroy(struct periodic_work *pw); -BOOL visor_periodic_work_nextperiod(struct periodic_work *pw); -BOOL visor_periodic_work_start(struct periodic_work *pw); -BOOL visor_periodic_work_stop(struct periodic_work *pw); +bool visor_periodic_work_nextperiod(struct periodic_work *pw); +bool visor_periodic_work_start(struct periodic_work *pw); +bool visor_periodic_work_stop(struct periodic_work *pw); #endif diff --git a/drivers/staging/unisys/include/procobjecttree.h b/drivers/staging/unisys/include/procobjecttree.h deleted file mode 100644 index 809c67942..000000000 --- a/drivers/staging/unisys/include/procobjecttree.h +++ /dev/null @@ -1,47 +0,0 @@ -/* procobjecttree.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/** @file ********************************************************************* - * - * This describes the interfaces necessary for creating a tree of types, - * objects, and properties in /proc. - * - ****************************************************************************** - */ - -#ifndef __PROCOBJECTTREE_H__ -#define __PROCOBJECTTREE_H__ - -#include "timskmod.h" - -/* These are opaque structures to users. - * Fields are declared only in the implementation .c files. - */ -typedef struct MYPROCOBJECT_Tag MYPROCOBJECT; -typedef struct MYPROCTYPE_Tag MYPROCTYPE; - -MYPROCOBJECT *visor_proc_CreateObject(MYPROCTYPE *type, const char *name, - void *context); -void visor_proc_DestroyObject(MYPROCOBJECT *obj); -MYPROCTYPE *visor_proc_CreateType(struct proc_dir_entry *procRootDir, - const char **name, - const char **propertyNames, - void (*show_property)(struct seq_file *, - void *, int)); -void visor_proc_DestroyType(MYPROCTYPE *type); - -#endif diff --git a/drivers/staging/unisys/include/sparstop.h b/drivers/staging/unisys/include/sparstop.h deleted file mode 100644 index 05837399a..000000000 --- a/drivers/staging/unisys/include/sparstop.h +++ /dev/null @@ -1,30 +0,0 @@ -/* sparstop.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __SPARSTOP_H__ -#define __SPARSTOP_H__ - -#include "timskmod.h" -#include "version.h" -#include <linux/ctype.h> - -typedef void (*SPARSTOP_COMPLETE_FUNC) (void *context, int status); - -int sp_stop(void *context, SPARSTOP_COMPLETE_FUNC get_complete_func); -void test_remove_stop_device(void); - -#endif diff --git a/drivers/staging/unisys/include/timskmod.h b/drivers/staging/unisys/include/timskmod.h deleted file mode 100644 index cde2494ad..000000000 --- a/drivers/staging/unisys/include/timskmod.h +++ /dev/null @@ -1,153 +0,0 @@ -/* timskmod.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __TIMSKMOD_H__ -#define __TIMSKMOD_H__ - -#include <linux/version.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/device.h> -#include <linux/kobject.h> -#include <linux/sysfs.h> -#include <linux/fs.h> -#include <linux/string.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/wait.h> -#include <linux/vmalloc.h> -#include <linux/proc_fs.h> -#include <linux/cdev.h> -#include <linux/types.h> -#include <asm/irq.h> -#include <linux/io.h> -#include <asm/dma.h> -#include <linux/uaccess.h> -#include <linux/list.h> -#include <linux/poll.h> -/* #define EXPORT_SYMTAB */ -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/fcntl.h> -#include <linux/workqueue.h> -#include <linux/kthread.h> -#include <linux/seq_file.h> -#include <linux/mm.h> - -/* #define DEBUG */ -#ifndef BOOL -#define BOOL int -#endif -#define FALSE 0 -#define TRUE 1 -#if !defined SUCCESS -#define SUCCESS 0 -#endif -#define MIN(a, b) (((a) < (b)) ? (a) : (b)) -#define MAX(a, b) (((a) > (b)) ? (a) : (b)) -#define STRUCTSEQUAL(x, y) (memcmp(&x, &y, sizeof(x)) == 0) -#ifndef HOSTADDRESS -#define HOSTADDRESS unsigned long long -#endif - -#define sizeofmember(TYPE, MEMBER) (sizeof(((TYPE *)0)->MEMBER)) -/** "Covered quotient" function */ -#define COVQ(v, d) (((v) + (d) - 1) / (d)) -#define SWAPPOINTERS(p1, p2) \ - do { \ - void *SWAPPOINTERS_TEMP = (void *)p1; \ - (void *)(p1) = (void *)(p2); \ - (void *)(p2) = SWAPPOINTERS_TEMP; \ - } while (0) - -#define WARNDRV(fmt, args...) LOGWRN(fmt, ## args) -#define SECUREDRV(fmt, args...) LOGWRN(fmt, ## args) - -#define PRINTKDEV(devname, fmt, args...) LOGINFDEV(devname, fmt, ## args) -#define TBDDEV(devname, fmt, args...) LOGERRDEV(devname, fmt, ## args) -#define HUHDEV(devname, fmt, args...) LOGERRDEV(devname, fmt, ## args) -#define ERRDEV(devname, fmt, args...) LOGERRDEV(devname, fmt, ## args) -#define ERRDEVX(devno, fmt, args...) LOGERRDEVX(devno, fmt, ## args) -#define WARNDEV(devname, fmt, args...) LOGWRNDEV(devname, fmt, ## args) -#define SECUREDEV(devname, fmt, args...) LOGWRNDEV(devname, fmt, ## args) -#define INFODEV(devname, fmt, args...) LOGINFDEV(devname, fmt, ## args) -#define INFODEVX(devno, fmt, args...) LOGINFDEVX(devno, fmt, ## args) - -/** Verifies the consistency of your PRIVATEDEVICEDATA structure using - * conventional "signature" fields: - * <p> - * - sig1 should contain the size of the structure - * - sig2 should contain a pointer to the beginning of the structure - */ -#define DDLOOKSVALID(dd) \ - ((dd != NULL) && \ - ((dd)->sig1 == sizeof(PRIVATEDEVICEDATA)) && \ - ((dd)->sig2 == dd)) - -/** Verifies the consistency of your PRIVATEFILEDATA structure using - * conventional "signature" fields: - * <p> - * - sig1 should contain the size of the structure - * - sig2 should contain a pointer to the beginning of the structure - */ -#define FDLOOKSVALID(fd) \ - ((fd != NULL) && \ - ((fd)->sig1 == sizeof(PRIVATEFILEDATA)) && \ - ((fd)->sig2 == fd)) - -/** Sleep for an indicated number of seconds (for use in kernel mode). - * x - the number of seconds to sleep. - */ -#define SLEEP(x) \ - do { __set_current_state(TASK_INTERRUPTIBLE); \ - schedule_timeout((x)*HZ); \ - } while (0) - -/** Sleep for an indicated number of jiffies (for use in kernel mode). - * x - the number of jiffies to sleep. - */ -#define SLEEPJIFFIES(x) \ - do { __set_current_state(TASK_INTERRUPTIBLE); \ - schedule_timeout(x); \ - } while (0) - -static inline struct cdev *cdev_alloc_init(struct module *owner, - const struct file_operations *fops) -{ - struct cdev *cdev = NULL; - - cdev = cdev_alloc(); - if (!cdev) - return NULL; - cdev->ops = fops; - cdev->owner = owner; - - /* Note that the memory allocated for cdev will be deallocated - * when the usage count drops to 0, because it is controlled - * by a kobject of type ktype_cdev_dynamic. (This - * deallocation could very well happen outside of our kernel - * module, like via the cdev_put in __fput() for example.) - */ - return cdev; -} - -extern int unisys_spar_platform; - -#endif diff --git a/drivers/staging/unisys/include/uisqueue.h b/drivers/staging/unisys/include/uisqueue.h deleted file mode 100644 index 08ba16ea8..000000000 --- a/drivers/staging/unisys/include/uisqueue.h +++ /dev/null @@ -1,396 +0,0 @@ -/* uisqueue.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * Unisys IO Virtualization header NOTE: This file contains only Linux - * specific structs. All OS-independent structs are in iochannel.h.xx - */ - -#ifndef __UISQUEUE_H__ -#define __UISQUEUE_H__ - -#include "linux/version.h" -#include "iochannel.h" -#include <linux/atomic.h> -#include <linux/semaphore.h> -#include <linux/uuid.h> - -#include "controlvmchannel.h" -#include "controlvmcompletionstatus.h" - -struct uisqueue_info { - struct channel_header __iomem *chan; - /* channel containing queues in which scsi commands & - * responses are queued - */ - u64 packets_sent; - u64 packets_received; - u64 interrupts_sent; - u64 interrupts_received; - u64 max_not_empty_cnt; - u64 total_wakeup_cnt; - u64 non_empty_wakeup_cnt; - - struct { - struct signal_queue_header reserved1; /* */ - struct signal_queue_header reserved2; /* */ - } safe_uis_queue; - unsigned int (*send_int_if_needed)(struct uisqueue_info *info, - unsigned int whichcqueue, - unsigned char issue_irq_if_empty, - u64 irq_handle, - unsigned char io_termination); -}; - -/* uisqueue_put_cmdrsp_with_lock_client queues a commmand or response - * to the specified queue, at the tail if the queue is full but - * oktowait == 0, then it return 0 indicating failure. otherwise it - * wait for the queue to become non-full. If command is queued, return - * 1 for success. - */ -#define DONT_ISSUE_INTERRUPT 0 -#define ISSUE_INTERRUPT 1 - -#define DONT_WAIT 0 -#define OK_TO_WAIT 1 -#define UISLIB_LOCK_PREFIX \ - ".section .smp_locks,\"a\"\n" \ - _ASM_ALIGN "\n" \ - _ASM_PTR "661f\n" /* address */ \ - ".previous\n" \ - "661:\n\tlock; " - -unsigned long long uisqueue_interlocked_or(unsigned long long __iomem *tgt, - unsigned long long set); -unsigned long long uisqueue_interlocked_and(unsigned long long __iomem *tgt, - unsigned long long set); - -int uisqueue_put_cmdrsp_with_lock_client(struct uisqueue_info *queueinfo, - struct uiscmdrsp *cmdrsp, - unsigned int queue, - void *insertlock, - unsigned char issue_irq_if_empty, - u64 irq_handle, - char oktowait, - u8 *channel_id); - -/* uisqueue_get_cmdrsp gets the cmdrsp entry at the head of the queue - * and copies it to the area pointed by cmdrsp param. - * returns 0 if queue is empty, 1 otherwise - */ -int - -uisqueue_get_cmdrsp(struct uisqueue_info *queueinfo, void *cmdrsp, - unsigned int queue); - -#define MAX_NAME_SIZE_UISQUEUE 64 - -struct extport_info { - u8 valid:1; - /* if 1, indicates this extport slot is occupied - * if 0, indicates that extport slot is unoccupied */ - - u32 num_devs_using; - /* When extport is added, this is set to 0. For exports - * located in NETWORK switches: - * Each time a VNIC, i.e., intport, is added to the switch this - * is used to assign a pref_pnic for the VNIC and when assigned - * to a VNIC this counter is incremented. When a VNIC is - * deleted, the extport corresponding to the VNIC's pref_pnic - * is located and its num_devs_using is decremented. For VNICs, - * num_devs_using is basically used to load-balance transmit - * traffic from VNICs. - */ - - struct switch_info *swtch; - struct pci_id pci_id; - char name[MAX_NAME_SIZE_UISQUEUE]; - union { - struct vhba_wwnn wwnn; - unsigned char macaddr[MAX_MACADDR_LEN]; - }; -}; - -struct device_info { - void __iomem *chanptr; - u64 channel_addr; - u64 channel_bytes; - uuid_le channel_uuid; - uuid_le instance_uuid; - struct irq_info intr; - struct switch_info *swtch; - char devid[30]; /* "vbus<busno>:dev<devno>" */ - u16 polling; - struct semaphore interrupt_callback_lock; - u32 bus_no; - u32 dev_no; - int (*interrupt)(void *); - void *interrupt_context; - void *private_data; - struct list_head list_polling_device_channels; - unsigned long long moved_to_tail_cnt; - unsigned long long first_busy_cnt; - unsigned long long last_on_list_cnt; -}; - -enum switch_type { - RECOVERY_LAN = 1, - IB_LAN = 2 -}; - -struct bus_info { - u32 bus_no, device_count; - struct device_info **device; - u64 guest_handle, recv_bus_irq_handle; - uuid_le bus_inst_uuid; - struct ultra_vbus_channel_protocol __iomem *bus_channel; - int bus_channel_bytes; - struct proc_dir_entry *proc_dir; /* proc/uislib/vbus/<x> */ - struct proc_dir_entry *proc_info; /* proc/uislib/vbus/<x>/info */ - char name[25]; - char partition_name[99]; - struct bus_info *next; - u8 local_vnic; /* 1 if local vnic created internally - * by IOVM; 0 otherwise... */ -}; - -struct sn_list_entry { - struct uisscsi_dest pdest; /* scsi bus, target, lun for - * phys disk */ - u8 sernum[MAX_SERIAL_NUM]; /* serial num of physical - * disk.. The length is always - * MAX_SERIAL_NUM, padded with - * spaces */ - struct sn_list_entry *next; -}; - -/* - * IO messages sent to UisnicControlChanFunc & UissdControlChanFunc by - * code that processes the ControlVm channel messages. - */ - -enum iopart_msg_type { - IOPART_ADD_VNIC, - IOPART_DEL_VNIC, - IOPART_DEL_ALL_VNICS, - IOPART_ADD_VHBA, - IOPART_ADD_VDISK, - IOPART_DEL_VHBA, - IOPART_DEL_VDISK, - IOPART_DEL_ALL_VDISKS_FOR_VHBA, - IOPART_DEL_ALL_VHBAS, - IOPART_ATTACH_PHBA, - IOPART_DETACH_PHBA, /* 10 */ - IOPART_ATTACH_PNIC, - IOPART_DETACH_PNIC, - IOPART_DETACH_VHBA, - IOPART_DETACH_VNIC, - IOPART_PAUSE_VDISK, - IOPART_RESUME_VDISK, - IOPART_ADD_DEVICE, /* add generic device */ - IOPART_DEL_DEVICE, /* del generic device */ -}; - -struct add_virt_iopart { - void *chanptr; /* pointer to data channel */ - u64 guest_handle; /* used to convert guest physical - * address to real physical address - * for DMA, for ex. */ - u64 recv_bus_irq_handle; /* used to register to receive - * bus level interrupts. */ - struct irq_info intr; /* contains recv & send - * interrupt info */ - /* recvInterruptHandle is used to register to receive - * interrupts on the data channel. Used by GuestLinux/Windows - * IO drivers to connect to interrupt. sendInterruptHandle is - * used by IOPart drivers as parameter to - * Issue_VMCALL_IO_QUEUE_TRANSITION to interrupt thread in - * guest linux/windows IO drivers when data channel queue for - * vhba/vnic goes from EMPTY to NON-EMPTY. */ - struct switch_info *swtch; /* pointer to the virtual - * switch to which the vnic is - * connected */ - - u8 use_g2g_copy; /* Used to determine if a virtual HBA - * needs to use G2G copy. */ - u8 filler[7]; - - u32 bus_no; - u32 dev_no; - char *params; - ulong params_bytes; - -}; - -struct add_vdisk_iopart { - void *chanptr; /* pointer to data channel */ - int implicit; - struct uisscsi_dest vdest; /* scsi bus, target, lun for virt disk */ - struct uisscsi_dest pdest; /* scsi bus, target, lun for phys disk */ - u8 sernum[MAX_SERIAL_NUM]; /* serial num of physical disk */ - u32 serlen; /* length of serial num */ -}; - -struct del_vdisk_iopart { - void *chanptr; /* pointer to data channel */ - struct uisscsi_dest vdest; /* scsi bus, target, lun for virt disk */ -}; - -struct del_virt_iopart { - void *chanptr; /* pointer to data channel */ -}; - -struct det_virt_iopart { /* detach internal port */ - void *chanptr; /* pointer to data channel */ - struct switch_info *swtch; -}; - -struct paures_vdisk_iopart { - void *chanptr; /* pointer to data channel */ - struct uisscsi_dest vdest; /* scsi bus, target, lun for virt disk */ -}; - -struct add_switch_iopart { /* add switch */ - struct switch_info *swtch; - char *params; - ulong params_bytes; -}; - -struct del_switch_iopart { /* destroy switch */ - struct switch_info *swtch; -}; - -struct io_msgs { - enum iopart_msg_type msgtype; - - /* additional params needed by some messages */ - union { - struct add_virt_iopart add_vhba; - struct add_virt_iopart add_vnic; - struct add_vdisk_iopart add_vdisk; - struct del_virt_iopart del_vhba; - struct del_virt_iopart del_vnic; - struct det_virt_iopart det_vhba; - struct det_virt_iopart det_vnic; - struct del_vdisk_iopart del_vdisk; - struct del_virt_iopart del_all_vdisks_for_vhba; - struct add_virt_iopart add_device; - struct del_virt_iopart del_device; - struct det_virt_iopart det_intport; - struct add_switch_iopart add_switch; - struct del_switch_iopart del_switch; - struct extport_info *ext_port; /* for attach or detach - * pnic/generic delete all - * vhbas/allvnics need no - * parameters */ - struct paures_vdisk_iopart paures_vdisk; - }; -}; - -/* -* Guest messages sent to VirtControlChanFunc by code that processes -* the ControlVm channel messages. -*/ - -enum guestpart_msg_type { - GUEST_ADD_VBUS, - GUEST_ADD_VHBA, - GUEST_ADD_VNIC, - GUEST_DEL_VBUS, - GUEST_DEL_VHBA, - GUEST_DEL_VNIC, - GUEST_DEL_ALL_VHBAS, - GUEST_DEL_ALL_VNICS, - GUEST_DEL_ALL_VBUSES, /* deletes all vhbas & vnics on all - * buses and deletes all buses */ - GUEST_PAUSE_VHBA, - GUEST_PAUSE_VNIC, - GUEST_RESUME_VHBA, - GUEST_RESUME_VNIC -}; - -struct add_vbus_guestpart { - void __iomem *chanptr; /* pointer to data channel for bus - - * NOT YET USED */ - u32 bus_no; /* bus number to be created/deleted */ - u32 dev_count; /* max num of devices on bus */ - uuid_le bus_uuid; /* indicates type of bus */ - uuid_le instance_uuid; /* instance guid for device */ -}; - -struct del_vbus_guestpart { - u32 bus_no; /* bus number to be deleted */ - /* once we start using the bus's channel, add can dump busNo - * into the channel header and then delete will need only one - * parameter, chanptr. */ -}; - -struct add_virt_guestpart { - void __iomem *chanptr; /* pointer to data channel */ - u32 bus_no; /* bus number for the operation */ - u32 device_no; /* number of device on the bus */ - uuid_le instance_uuid; /* instance guid for device */ - struct irq_info intr; /* recv/send interrupt info */ - /* recvInterruptHandle contains info needed in order to - * register to receive interrupts on the data channel. - * sendInterruptHandle contains handle which is provided to - * monitor VMCALL that will cause an interrupt to be generated - * for the other end. - */ -}; - -struct pause_virt_guestpart { - void __iomem *chanptr; /* pointer to data channel */ -}; - -struct resume_virt_guestpart { - void __iomem *chanptr; /* pointer to data channel */ -}; - -struct del_virt_guestpart { - void __iomem *chanptr; /* pointer to data channel */ -}; - -struct init_chipset_guestpart { - u32 bus_count; /* indicates the max number of busses */ - u32 switch_count; /* indicates the max number of switches */ -}; - -struct guest_msgs { - enum guestpart_msg_type msgtype; - - /* additional params needed by messages */ - union { - struct add_vbus_guestpart add_vbus; - struct add_virt_guestpart add_vhba; - struct add_virt_guestpart add_vnic; - struct pause_virt_guestpart pause_vhba; - struct pause_virt_guestpart pause_vnic; - struct resume_virt_guestpart resume_vhba; - struct resume_virt_guestpart resume_vnic; - struct del_vbus_guestpart del_vbus; - struct del_virt_guestpart del_vhba; - struct del_virt_guestpart del_vnic; - struct del_vbus_guestpart del_all_vhbas; - struct del_vbus_guestpart del_all_vnics; - /* del_all_vbuses needs no parameters */ - }; - struct init_chipset_guestpart init_chipset; - -}; - -#endif /* __UISQUEUE_H__ */ diff --git a/drivers/staging/unisys/include/uisthread.h b/drivers/staging/unisys/include/uisthread.h deleted file mode 100644 index 52c3eb4de..000000000 --- a/drivers/staging/unisys/include/uisthread.h +++ /dev/null @@ -1,42 +0,0 @@ -/* uisthread.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/*****************************************************************************/ -/* Unisys thread utilities header */ -/*****************************************************************************/ - -#ifndef __UISTHREAD_H__ -#define __UISTHREAD_H__ - -#include "linux/completion.h" - -struct uisthread_info { - struct task_struct *task; - int id; - struct completion has_stopped; -}; - -/* returns 0 for failure, 1 for success */ -int uisthread_start( - struct uisthread_info *thrinfo, - int (*threadfn)(void *), - void *thrcontext, - char *name); - -void uisthread_stop(struct uisthread_info *thrinfo); - -#endif /* __UISTHREAD_H__ */ diff --git a/drivers/staging/unisys/include/uisutils.h b/drivers/staging/unisys/include/uisutils.h deleted file mode 100644 index c7d0ba8aa..000000000 --- a/drivers/staging/unisys/include/uisutils.h +++ /dev/null @@ -1,299 +0,0 @@ -/* uisutils.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * Unisys Virtual HBA utilities header - */ - -#ifndef __UISUTILS__H__ -#define __UISUTILS__H__ -#include <linux/string.h> -#include <linux/io.h> -#include <linux/sched.h> -#include <linux/gfp.h> -#include <linux/uuid.h> -#include <linux/if_ether.h> - -#include "vmcallinterface.h" -#include "channel.h" -#include "uisthread.h" -#include "uisqueue.h" -#include "diagnostics/appos_subsystems.h" -#include "vbusdeviceinfo.h" -#include <linux/atomic.h> - -/* This is the MAGIC number stuffed by virthba in host->this_id. Used to - * identify virtual hbas. - */ -#define UIS_MAGIC_VHBA 707 - -/* global function pointers that act as callback functions into - * uisnicmod, uissdmod, and virtpcimod - */ -extern int (*uisnic_control_chan_func)(struct io_msgs *); -extern int (*uissd_control_chan_func)(struct io_msgs *); -extern int (*virt_control_chan_func)(struct guest_msgs *); - -/* Return values of above callback functions: */ -#define CCF_ERROR 0 /* completed and failed */ -#define CCF_OK 1 /* completed successfully */ -#define CCF_PENDING 2 /* operation still pending */ -extern atomic_t uisutils_registered_services; - -struct req_handler_info { - uuid_le switch_uuid; - int (*controlfunc)(struct io_msgs *); - unsigned long min_channel_bytes; - int (*server_channel_ok)(unsigned long channel_bytes); - int (*server_channel_init)(void *x, unsigned char *client_str, - u32 client_str_len, u64 bytes); - char switch_type_name[99]; - struct list_head list_link; /* links into ReqHandlerInfo_list */ -}; - -struct req_handler_info *req_handler_find(uuid_le switch_uuid); - -#define uislib_ioremap_cache(addr, size) \ - dbg_ioremap_cache(addr, size, __FILE__, __LINE__) - -static inline void __iomem * -dbg_ioremap_cache(u64 addr, unsigned long size, char *file, int line) -{ - void __iomem *new; - - new = ioremap_cache(addr, size); - return new; -} - -#define uislib_ioremap(addr, size) dbg_ioremap(addr, size, __FILE__, __LINE__) - -static inline void * -dbg_ioremap(u64 addr, unsigned long size, char *file, int line) -{ - void *new; - - new = ioremap(addr, size); - return new; -} - -#define uislib_iounmap(addr) dbg_iounmap(addr, __FILE__, __LINE__) - -static inline void -dbg_iounmap(void __iomem *addr, char *file, int line) -{ - iounmap(addr); -} - -#define PROC_READ_BUFFER_SIZE 131072 /* size of the buffer to allocate to - * hold all of /proc/XXX/info */ -int uisutil_add_proc_line_ex(int *total, char **buffer, int *buffer_remaining, - char *format, ...); - -int uisctrl_register_req_handler(int type, void *fptr, - struct ultra_vbus_deviceinfo *chipset_driver_info); - -unsigned char *util_map_virt(struct phys_info *sg); -void util_unmap_virt(struct phys_info *sg); -unsigned char *util_map_virt_atomic(struct phys_info *sg); -void util_unmap_virt_atomic(void *buf); -int uislib_client_inject_add_bus(u32 bus_no, uuid_le inst_uuid, - u64 channel_addr, ulong n_channel_bytes); -int uislib_client_inject_del_bus(u32 bus_no); - -int uislib_client_inject_add_vhba(u32 bus_no, u32 dev_no, - u64 phys_chan_addr, u32 chan_bytes, - int is_test_addr, uuid_le inst_uuid, - struct irq_info *intr); -int uislib_client_inject_pause_vhba(u32 bus_no, u32 dev_no); -int uislib_client_inject_resume_vhba(u32 bus_no, u32 dev_no); -int uislib_client_inject_del_vhba(u32 bus_no, u32 dev_no); -int uislib_client_inject_add_vnic(u32 bus_no, u32 dev_no, - u64 phys_chan_addr, u32 chan_bytes, - int is_test_addr, uuid_le inst_uuid, - struct irq_info *intr); -int uislib_client_inject_pause_vnic(u32 bus_no, u32 dev_no); -int uislib_client_inject_resume_vnic(u32 bus_no, u32 dev_no); -int uislib_client_inject_del_vnic(u32 bus_no, u32 dev_no); -#ifdef STORAGE_CHANNEL -u64 uislib_storage_channel(int client_id); -#endif -int uislib_get_owned_pdest(struct uisscsi_dest *pdest); - -int uislib_send_event(enum controlvm_id id, - struct controlvm_message_packet *event); - -/* structure used by vhba & vnic to keep track of queue & thread info */ -struct chaninfo { - struct uisqueue_info *queueinfo; - /* this specifies the queue structures for a channel */ - /* ALLOCATED BY THE OTHER END - WE JUST GET A POINTER TO THE MEMORY */ - spinlock_t insertlock; - /* currently used only in virtnic when sending data to uisnic */ - /* to synchronize the inserts into the signal queue */ - struct uisthread_info threadinfo; - /* this specifies the thread structures used by the thread that */ - /* handles this channel */ -}; - -/* this is the wait code for all the threads - it is used to get -* something from a queue choices: wait_for_completion_interruptible, -* _timeout, interruptible_timeout -*/ -#define UIS_THREAD_WAIT_MSEC(x) { \ - set_current_state(TASK_INTERRUPTIBLE); \ - schedule_timeout(msecs_to_jiffies(x)); \ -} - -#define UIS_THREAD_WAIT_USEC(x) { \ - set_current_state(TASK_INTERRUPTIBLE); \ - schedule_timeout(usecs_to_jiffies(x)); \ -} - -#define UIS_THREAD_WAIT UIS_THREAD_WAIT_MSEC(5) - -#define UIS_THREAD_WAIT_SEC(x) { \ - set_current_state(TASK_INTERRUPTIBLE); \ - schedule_timeout((x)*HZ); \ -} - -/* This is a hack until we fix IOVM to initialize the channel header - * correctly at DEVICE_CREATE time, INSTEAD OF waiting until - * DEVICE_CONFIGURE time. - */ -static inline void -wait_for_valid_guid(uuid_le __iomem *guid) -{ - uuid_le tmpguid; - - while (1) { - memcpy_fromio((void *)&tmpguid, - (void __iomem *)guid, sizeof(uuid_le)); - if (uuid_le_cmp(tmpguid, NULL_UUID_LE) != 0) - break; - UIS_THREAD_WAIT_SEC(5); - } -} - -static inline unsigned int -issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) -{ - struct vmcall_io_controlvm_addr_params params; - int result = VMCALL_SUCCESS; - u64 physaddr; - - physaddr = virt_to_phys(¶ms); - ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result); - if (VMCALL_SUCCESSFUL(result)) { - *control_addr = params.address; - *control_bytes = params.channel_bytes; - } - return result; -} - -static inline unsigned int issue_vmcall_io_diag_addr(u64 *diag_channel_addr) -{ - struct vmcall_io_diag_addr_params params; - int result = VMCALL_SUCCESS; - u64 physaddr; - - physaddr = virt_to_phys(¶ms); - ISSUE_IO_VMCALL(VMCALL_IO_DIAG_ADDR, physaddr, result); - if (VMCALL_SUCCESSFUL(result)) - *diag_channel_addr = params.address; - return result; -} - -static inline unsigned int issue_vmcall_io_visorserial_addr(u64 *channel_addr) -{ - struct vmcall_io_visorserial_addr_params params; - int result = VMCALL_SUCCESS; - u64 physaddr; - - physaddr = virt_to_phys(¶ms); - ISSUE_IO_VMCALL(VMCALL_IO_VISORSERIAL_ADDR, physaddr, result); - if (VMCALL_SUCCESSFUL(result)) - *channel_addr = params.address; - return result; -} - -static inline s64 issue_vmcall_query_guest_virtual_time_offset(void) -{ - u64 result = VMCALL_SUCCESS; - u64 physaddr = 0; - - ISSUE_IO_VMCALL(VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET, physaddr, - result); - return result; -} - -struct log_info_t { - unsigned long long last_cycles; - unsigned long long delta_sum[64]; - unsigned long long delta_cnt[64]; - unsigned long long max_delta[64]; - unsigned long long min_delta[64]; -}; - -static inline int issue_vmcall_update_physical_time(u64 adjustment) -{ - int result = VMCALL_SUCCESS; - - ISSUE_IO_VMCALL(VMCALL_UPDATE_PHYSICAL_TIME, adjustment, result); - return result; -} - -static inline unsigned int issue_vmcall_channel_mismatch(const char *chname, - const char *item_name, u32 line_no, - const char *path_n_fn) -{ - struct vmcall_channel_version_mismatch_params params; - int result = VMCALL_SUCCESS; - u64 physaddr; - char *last_slash = NULL; - - strlcpy(params.chname, chname, sizeof(params.chname)); - strlcpy(params.item_name, item_name, sizeof(params.item_name)); - params.line_no = line_no; - - last_slash = strrchr(path_n_fn, '/'); - if (last_slash != NULL) { - last_slash++; - strlcpy(params.file_name, last_slash, sizeof(params.file_name)); - } else - strlcpy(params.file_name, - "Cannot determine source filename", - sizeof(params.file_name)); - - physaddr = virt_to_phys(¶ms); - ISSUE_IO_VMCALL(VMCALL_CHANNEL_VERSION_MISMATCH, physaddr, result); - return result; -} - -#define UIS_DAEMONIZE(nam) -void *uislib_cache_alloc(struct kmem_cache *cur_pool, char *fn, int ln); -#define UISCACHEALLOC(cur_pool) uislib_cache_alloc(cur_pool, __FILE__, __LINE__) -void uislib_cache_free(struct kmem_cache *cur_pool, void *p, char *fn, int ln); -#define UISCACHEFREE(cur_pool, p) \ - uislib_cache_free(cur_pool, p, __FILE__, __LINE__) - -void uislib_enable_channel_interrupts(u32 bus_no, u32 dev_no, - int (*interrupt)(void *), - void *interrupt_context); -void uislib_disable_channel_interrupts(u32 bus_no, u32 dev_no); -void uislib_force_channel_interrupt(u32 bus_no, u32 dev_no); - -#endif /* __UISUTILS__H__ */ diff --git a/drivers/staging/unisys/include/vbushelper.h b/drivers/staging/unisys/include/vbushelper.h index 84abe5f99..f272975b2 100644 --- a/drivers/staging/unisys/include/vbushelper.h +++ b/drivers/staging/unisys/include/vbushelper.h @@ -18,8 +18,6 @@ #ifndef __VBUSHELPER_H__ #define __VBUSHELPER_H__ -#include "vbusdeviceinfo.h" - /* TARGET_HOSTNAME specified as -DTARGET_HOSTNAME=\"thename\" on the * command line */ diff --git a/drivers/staging/unisys/common-spar/include/version.h b/drivers/staging/unisys/include/version.h index 83d1da7a2..83d1da7a2 100644 --- a/drivers/staging/unisys/common-spar/include/version.h +++ b/drivers/staging/unisys/include/version.h diff --git a/drivers/staging/unisys/include/visorbus.h b/drivers/staging/unisys/include/visorbus.h new file mode 100644 index 000000000..e4a21e42e --- /dev/null +++ b/drivers/staging/unisys/include/visorbus.h @@ -0,0 +1,222 @@ +/* visorbus.h + * + * Copyright (C) 2010 - 2013 UNISYS CORPORATION + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +/* + * This header file is to be included by other kernel mode components that + * implement a particular kind of visor_device. Each of these other kernel + * mode components is called a visor device driver. Refer to visortemplate + * for a minimal sample visor device driver. + * + * There should be nothing in this file that is private to the visorbus + * bus implementation itself. + * + */ + +#ifndef __VISORBUS_H__ +#define __VISORBUS_H__ + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/poll.h> +#include <linux/kernel.h> +#include <linux/uuid.h> + +#include "periodic_work.h" +#include "channel.h" + +struct visor_driver; +struct visor_device; +extern struct bus_type visorbus_type; + +typedef void (*visorbus_state_complete_func) (struct visor_device *dev, + int status); +struct visorchipset_state { + u32 created:1; + u32 attached:1; + u32 configured:1; + u32 running:1; + /* Add new fields above. */ + /* Remaining bits in this 32-bit word are unused. */ +}; + +/** This struct describes a specific Supervisor channel, by providing its + * GUID, name, and sizes. + */ +struct visor_channeltype_descriptor { + const uuid_le guid; + const char *name; +}; + +/** Information provided by each visor driver when it registers with the + * visorbus driver. + */ +struct visor_driver { + const char *name; + const char *version; + const char *vertag; + const char *build_date; + const char *build_time; + struct module *owner; + + /** Types of channels handled by this driver, ending with 0 GUID. + * Our specialized BUS.match() method knows about this list, and + * uses it to determine whether this driver will in fact handle a + * new device that it has detected. + */ + struct visor_channeltype_descriptor *channel_types; + + /** Called when a new device comes online, by our probe() function + * specified by driver.probe() (triggered ultimately by some call + * to driver_register() / bus_add_driver() / driver_attach()). + */ + int (*probe)(struct visor_device *dev); + + /** Called when a new device is removed, by our remove() function + * specified by driver.remove() (triggered ultimately by some call + * to device_release_driver()). + */ + void (*remove)(struct visor_device *dev); + + /** Called periodically, whenever there is a possibility that + * "something interesting" may have happened to the channel state. + */ + void (*channel_interrupt)(struct visor_device *dev); + + /** Called to initiate a change of the device's state. If the return + * valu`e is < 0, there was an error and the state transition will NOT + * occur. If the return value is >= 0, then the state transition was + * INITIATED successfully, and complete_func() will be called (or was + * just called) with the final status when either the state transition + * fails or completes successfully. + */ + int (*pause)(struct visor_device *dev, + visorbus_state_complete_func complete_func); + int (*resume)(struct visor_device *dev, + visorbus_state_complete_func complete_func); + + /** These fields are for private use by the bus driver only. */ + struct device_driver driver; + struct driver_attribute version_attr; +}; + +#define to_visor_driver(x) container_of(x, struct visor_driver, driver) + +/** A device type for things "plugged" into the visorbus bus */ + +struct visor_device { + /** visor driver can use the visorchannel member with the functions + * defined in visorchannel.h to access the channel + */ + struct visorchannel *visorchannel; + uuid_le channel_type_guid; + u64 channel_bytes; + + /** These fields are for private use by the bus driver only. + * A notable exception is that the visor driver can use + * visor_get_drvdata() and visor_set_drvdata() to retrieve or stash + * private visor driver specific data within the device member. + */ + struct device device; + struct list_head list_all; + struct periodic_work *periodic_work; + bool being_removed; + bool responded_to_device_create; + struct kobject kobjdevmajorminor; /* visorbus<x>/dev<y>/devmajorminor/*/ + struct { + int major, minor; + void *attr; /* private use by devmajorminor_attr.c you can + * change this constant to whatever you + * want; */ + } devnodes[5]; + /* the code will detect and behave appropriately) */ + struct semaphore visordriver_callback_lock; + bool pausing; + bool resuming; + u32 chipset_bus_no; + u32 chipset_dev_no; + struct visorchipset_state state; + uuid_le type; + uuid_le inst; + u8 *name; + u8 *description; + struct controlvm_message_header *pending_msg_hdr; + void *vbus_hdr_info; + u32 switch_no; + u32 internal_port_no; + uuid_le partition_uuid; +}; + +#define to_visor_device(x) container_of(x, struct visor_device, device) + +#ifndef STANDALONE_CLIENT +int visorbus_register_visor_driver(struct visor_driver *); +void visorbus_unregister_visor_driver(struct visor_driver *); +int visorbus_read_channel(struct visor_device *dev, + unsigned long offset, void *dest, + unsigned long nbytes); +int visorbus_write_channel(struct visor_device *dev, + unsigned long offset, void *src, + unsigned long nbytes); +int visorbus_clear_channel(struct visor_device *dev, + unsigned long offset, u8 ch, unsigned long nbytes); +int visorbus_registerdevnode(struct visor_device *dev, + const char *name, int major, int minor); +void visorbus_enable_channel_interrupts(struct visor_device *dev); +void visorbus_disable_channel_interrupts(struct visor_device *dev); +#endif + +/* Note that for visorchannel_create() + * <channel_bytes> and <guid> arguments may be 0 if we are a channel CLIENT. + * In this case, the values can simply be read from the channel header. + */ +struct visorchannel *visorchannel_create(u64 physaddr, + unsigned long channel_bytes, + gfp_t gfp, uuid_le guid); +struct visorchannel *visorchannel_create_with_lock(u64 physaddr, + unsigned long channel_bytes, + gfp_t gfp, uuid_le guid); +void visorchannel_destroy(struct visorchannel *channel); +int visorchannel_read(struct visorchannel *channel, ulong offset, + void *local, ulong nbytes); +int visorchannel_write(struct visorchannel *channel, ulong offset, + void *local, ulong nbytes); +int visorchannel_clear(struct visorchannel *channel, ulong offset, + u8 ch, ulong nbytes); +bool visorchannel_signalremove(struct visorchannel *channel, u32 queue, + void *msg); +bool visorchannel_signalinsert(struct visorchannel *channel, u32 queue, + void *msg); +int visorchannel_signalqueue_slots_avail(struct visorchannel *channel, + u32 queue); +int visorchannel_signalqueue_max_slots(struct visorchannel *channel, u32 queue); +u64 visorchannel_get_physaddr(struct visorchannel *channel); +ulong visorchannel_get_nbytes(struct visorchannel *channel); +char *visorchannel_id(struct visorchannel *channel, char *s); +char *visorchannel_zoneid(struct visorchannel *channel, char *s); +u64 visorchannel_get_clientpartition(struct visorchannel *channel); +int visorchannel_set_clientpartition(struct visorchannel *channel, + u64 partition_handle); +uuid_le visorchannel_get_uuid(struct visorchannel *channel); +char *visorchannel_uuid_id(uuid_le *guid, char *s); +void visorchannel_debug(struct visorchannel *channel, int num_queues, + struct seq_file *seq, u32 off); +void __iomem *visorchannel_get_header(struct visorchannel *channel); + +#define BUS_ROOT_DEVICE UINT_MAX +struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, + struct visor_device *from); +#endif diff --git a/drivers/staging/unisys/uislib/Kconfig b/drivers/staging/unisys/uislib/Kconfig deleted file mode 100644 index c39a0a21a..000000000 --- a/drivers/staging/unisys/uislib/Kconfig +++ /dev/null @@ -1,10 +0,0 @@ -# -# Unisys uislib configuration -# - -config UNISYS_UISLIB - tristate "Unisys uislib driver" - select UNISYS_VISORCHIPSET - ---help--- - If you say Y here, you will enable the Unisys uislib driver. - diff --git a/drivers/staging/unisys/uislib/Makefile b/drivers/staging/unisys/uislib/Makefile deleted file mode 100644 index 860f494f1..000000000 --- a/drivers/staging/unisys/uislib/Makefile +++ /dev/null @@ -1,12 +0,0 @@ -# -# Makefile for Unisys uislib -# - -obj-$(CONFIG_UNISYS_UISLIB) += visoruislib.o - -visoruislib-y := uislib.o uisqueue.o uisthread.o uisutils.o - -ccflags-y += -Idrivers/staging/unisys/include -ccflags-y += -Idrivers/staging/unisys/visorchipset -ccflags-y += -Idrivers/staging/unisys/common-spar/include -ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels diff --git a/drivers/staging/unisys/uislib/uislib.c b/drivers/staging/unisys/uislib/uislib.c deleted file mode 100644 index f93d0bb11..000000000 --- a/drivers/staging/unisys/uislib/uislib.c +++ /dev/null @@ -1,1372 +0,0 @@ -/* uislib.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* @ALL_INSPECTED */ -#define EXPORT_SYMTAB -#include <linux/kernel.h> -#include <linux/highmem.h> -#ifdef CONFIG_MODVERSIONS -#include <config/modversions.h> -#endif -#include <linux/module.h> -#include <linux/debugfs.h> - -#include <linux/types.h> -#include <linux/uuid.h> - -#include <linux/version.h> -#include "diagnostics/appos_subsystems.h" -#include "uisutils.h" -#include "vbuschannel.h" - -#include <linux/proc_fs.h> -#include <linux/uaccess.h> /* for copy_from_user */ -#include <linux/ctype.h> /* for toupper */ -#include <linux/list.h> - -#include "sparstop.h" -#include "visorchipset.h" -#include "version.h" -#include "guestlinuxdebug.h" - -#define SET_PROC_OWNER(x, y) - -#define POLLJIFFIES_NORMAL 1 -/* Choose whether or not you want to wakeup the request-polling thread - * after an IO termination: - * this is shorter than using __FILE__ (full path name) in - * debug/info/error messages - */ -#define CURRENT_FILE_PC UISLIB_PC_uislib_c -#define __MYFILE__ "uislib.c" - -/* global function pointers that act as callback functions into virtpcimod */ -int (*virt_control_chan_func)(struct guest_msgs *); - -static int debug_buf_valid; -static char *debug_buf; /* Note this MUST be global, - * because the contents must */ -static unsigned int chipset_inited; - -#define WAIT_ON_CALLBACK(handle) \ - do { \ - if (handle) \ - break; \ - UIS_THREAD_WAIT; \ - } while (1) - -static struct bus_info *bus_list; -static rwlock_t bus_list_lock; -static int bus_list_count; /* number of buses in the list */ -static int max_bus_count; /* maximum number of buses expected */ -static u64 phys_data_chan; -static int platform_no; - -static struct uisthread_info incoming_ti; -static BOOL incoming_started = FALSE; -static LIST_HEAD(poll_dev_chan); -static unsigned long long tot_moved_to_tail_cnt; -static unsigned long long tot_wait_cnt; -static unsigned long long tot_wakeup_cnt; -static unsigned long long tot_schedule_cnt; -static int en_smart_wakeup = 1; -static DEFINE_SEMAPHORE(poll_dev_lock); /* unlocked */ -static DECLARE_WAIT_QUEUE_HEAD(poll_dev_wake_q); -static int poll_dev_start; - -#define CALLHOME_PROC_ENTRY_FN "callhome" -#define CALLHOME_THROTTLED_PROC_ENTRY_FN "callhome_throttled" - -#define DIR_DEBUGFS_ENTRY "uislib" -static struct dentry *dir_debugfs; - -#define PLATFORMNUMBER_DEBUGFS_ENTRY_FN "platform" -static struct dentry *platformnumber_debugfs_read; - -#define CYCLES_BEFORE_WAIT_DEBUGFS_ENTRY_FN "cycles_before_wait" -static struct dentry *cycles_before_wait_debugfs_read; - -#define SMART_WAKEUP_DEBUGFS_ENTRY_FN "smart_wakeup" -static struct dentry *smart_wakeup_debugfs_entry; - -#define INFO_DEBUGFS_ENTRY_FN "info" -static struct dentry *info_debugfs_entry; - -static unsigned long long cycles_before_wait, wait_cycles; - -/*****************************************************/ -/* local functions */ -/*****************************************************/ - -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset); -static const struct file_operations debugfs_info_fops = { - .read = info_debugfs_read, -}; - -static void -init_msg_header(struct controlvm_message *msg, u32 id, uint rsp, uint svr) -{ - memset(msg, 0, sizeof(struct controlvm_message)); - msg->hdr.id = id; - msg->hdr.flags.response_expected = rsp; - msg->hdr.flags.server = svr; -} - -static __iomem void *init_vbus_channel(u64 ch_addr, u32 ch_bytes) -{ - void __iomem *ch = uislib_ioremap_cache(ch_addr, ch_bytes); - - if (!ch) - return NULL; - - if (!SPAR_VBUS_CHANNEL_OK_CLIENT(ch)) { - uislib_iounmap(ch); - return NULL; - } - return ch; -} - -static int -create_bus(struct controlvm_message *msg, char *buf) -{ - u32 bus_no, dev_count; - struct bus_info *tmp, *bus; - size_t size; - - if (max_bus_count == bus_list_count) { - POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, max_bus_count, - POSTCODE_SEVERITY_ERR); - return CONTROLVM_RESP_ERROR_MAX_BUSES; - } - - bus_no = msg->cmd.create_bus.bus_no; - dev_count = msg->cmd.create_bus.dev_count; - - POSTCODE_LINUX_4(BUS_CREATE_ENTRY_PC, bus_no, dev_count, - POSTCODE_SEVERITY_INFO); - - size = - sizeof(struct bus_info) + - (dev_count * sizeof(struct device_info *)); - bus = kzalloc(size, GFP_ATOMIC); - if (!bus) { - POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, - POSTCODE_SEVERITY_ERR); - return CONTROLVM_RESP_ERROR_KMALLOC_FAILED; - } - - /* Currently by default, the bus Number is the GuestHandle. - * Configure Bus message can override this. - */ - if (msg->hdr.flags.test_message) { - /* This implies we're the IOVM so set guest handle to 0... */ - bus->guest_handle = 0; - bus->bus_no = bus_no; - bus->local_vnic = 1; - } else { - bus->bus_no = bus_no; - bus->guest_handle = bus_no; - } - sprintf(bus->name, "%d", (int)bus->bus_no); - bus->device_count = dev_count; - bus->device = - (struct device_info **)((char *)bus + sizeof(struct bus_info)); - bus->bus_inst_uuid = msg->cmd.create_bus.bus_inst_uuid; - bus->bus_channel_bytes = 0; - bus->bus_channel = NULL; - - /* add bus to our bus list - but check for duplicates first */ - read_lock(&bus_list_lock); - for (tmp = bus_list; tmp; tmp = tmp->next) { - if (tmp->bus_no == bus->bus_no) - break; - } - read_unlock(&bus_list_lock); - if (tmp) { - /* found a bus already in the list with same bus_no - - * reject add - */ - POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->bus_no, - POSTCODE_SEVERITY_ERR); - kfree(bus); - return CONTROLVM_RESP_ERROR_ALREADY_DONE; - } - if ((msg->cmd.create_bus.channel_addr != 0) && - (msg->cmd.create_bus.channel_bytes != 0)) { - bus->bus_channel_bytes = msg->cmd.create_bus.channel_bytes; - bus->bus_channel = - init_vbus_channel(msg->cmd.create_bus.channel_addr, - msg->cmd.create_bus.channel_bytes); - } - /* the msg is bound for virtpci; send guest_msgs struct to callback */ - if (!msg->hdr.flags.server) { - struct guest_msgs cmd; - - cmd.msgtype = GUEST_ADD_VBUS; - cmd.add_vbus.bus_no = bus_no; - cmd.add_vbus.chanptr = bus->bus_channel; - cmd.add_vbus.dev_count = dev_count; - cmd.add_vbus.bus_uuid = msg->cmd.create_bus.bus_data_type_uuid; - cmd.add_vbus.instance_uuid = msg->cmd.create_bus.bus_inst_uuid; - if (!virt_control_chan_func) { - POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->bus_no, - POSTCODE_SEVERITY_ERR); - kfree(bus); - return CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE; - } - if (!virt_control_chan_func(&cmd)) { - POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus->bus_no, - POSTCODE_SEVERITY_ERR); - kfree(bus); - return - CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_CALLBACK_ERROR; - } - } - - /* add bus at the head of our list */ - write_lock(&bus_list_lock); - if (!bus_list) { - bus_list = bus; - } else { - bus->next = bus_list; - bus_list = bus; - } - bus_list_count++; - write_unlock(&bus_list_lock); - - POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus->bus_no, - POSTCODE_SEVERITY_INFO); - return CONTROLVM_RESP_SUCCESS; -} - -static int -destroy_bus(struct controlvm_message *msg, char *buf) -{ - int i; - struct bus_info *bus, *prev = NULL; - struct guest_msgs cmd; - u32 bus_no; - - bus_no = msg->cmd.destroy_bus.bus_no; - - read_lock(&bus_list_lock); - - bus = bus_list; - while (bus) { - if (bus->bus_no == bus_no) - break; - prev = bus; - bus = bus->next; - } - - if (!bus) { - read_unlock(&bus_list_lock); - return CONTROLVM_RESP_ERROR_ALREADY_DONE; - } - - /* verify that this bus has no devices. */ - for (i = 0; i < bus->device_count; i++) { - if (bus->device[i]) { - read_unlock(&bus_list_lock); - return CONTROLVM_RESP_ERROR_BUS_DEVICE_ATTACHED; - } - } - read_unlock(&bus_list_lock); - - if (msg->hdr.flags.server) - goto remove; - - /* client messages require us to call the virtpci callback associated - with this bus. */ - cmd.msgtype = GUEST_DEL_VBUS; - cmd.del_vbus.bus_no = bus_no; - if (!virt_control_chan_func) - return CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE; - - if (!virt_control_chan_func(&cmd)) - return CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_CALLBACK_ERROR; - - /* finally, remove the bus from the list */ -remove: - write_lock(&bus_list_lock); - if (prev) /* not at head */ - prev->next = bus->next; - else - bus_list = bus->next; - bus_list_count--; - write_unlock(&bus_list_lock); - - if (bus->bus_channel) { - uislib_iounmap(bus->bus_channel); - bus->bus_channel = NULL; - } - - kfree(bus); - return CONTROLVM_RESP_SUCCESS; -} - -static int create_device(struct controlvm_message *msg, char *buf) -{ - struct device_info *dev; - struct bus_info *bus; - struct guest_msgs cmd; - u32 bus_no, dev_no; - int result = CONTROLVM_RESP_SUCCESS; - u64 min_size = MIN_IO_CHANNEL_SIZE; - struct req_handler_info *req_handler; - - bus_no = msg->cmd.create_device.bus_no; - dev_no = msg->cmd.create_device.dev_no; - - POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, - POSTCODE_SEVERITY_INFO); - - dev = kzalloc(sizeof(*dev), GFP_ATOMIC); - if (!dev) { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, - POSTCODE_SEVERITY_ERR); - return CONTROLVM_RESP_ERROR_KMALLOC_FAILED; - } - - dev->channel_uuid = msg->cmd.create_device.data_type_uuid; - dev->intr = msg->cmd.create_device.intr; - dev->channel_addr = msg->cmd.create_device.channel_addr; - dev->bus_no = bus_no; - dev->dev_no = dev_no; - sema_init(&dev->interrupt_callback_lock, 1); /* unlocked */ - sprintf(dev->devid, "vbus%u:dev%u", (unsigned)bus_no, (unsigned)dev_no); - /* map the channel memory for the device. */ - if (msg->hdr.flags.test_message) { - dev->chanptr = (void __iomem *)__va(dev->channel_addr); - } else { - req_handler = req_handler_find(dev->channel_uuid); - if (req_handler) - /* generic service handler registered for this - * channel - */ - min_size = req_handler->min_channel_bytes; - if (min_size > msg->cmd.create_device.channel_bytes) { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, - bus_no, POSTCODE_SEVERITY_ERR); - result = CONTROLVM_RESP_ERROR_CHANNEL_SIZE_TOO_SMALL; - goto cleanup; - } - dev->chanptr = - uislib_ioremap_cache(dev->channel_addr, - msg->cmd.create_device.channel_bytes); - if (!dev->chanptr) { - result = CONTROLVM_RESP_ERROR_IOREMAP_FAILED; - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, - bus_no, POSTCODE_SEVERITY_ERR); - goto cleanup; - } - } - dev->instance_uuid = msg->cmd.create_device.dev_inst_uuid; - dev->channel_bytes = msg->cmd.create_device.channel_bytes; - - read_lock(&bus_list_lock); - for (bus = bus_list; bus; bus = bus->next) { - if (bus->bus_no != bus_no) - continue; - /* make sure the device number is valid */ - if (dev_no >= bus->device_count) { - result = CONTROLVM_RESP_ERROR_MAX_DEVICES; - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, - bus_no, POSTCODE_SEVERITY_ERR); - read_unlock(&bus_list_lock); - goto cleanup; - } - /* make sure this device is not already set */ - if (bus->device[dev_no]) { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, - dev_no, bus_no, - POSTCODE_SEVERITY_ERR); - result = CONTROLVM_RESP_ERROR_ALREADY_DONE; - read_unlock(&bus_list_lock); - goto cleanup; - } - read_unlock(&bus_list_lock); - /* the msg is bound for virtpci; send - * guest_msgs struct to callback - */ - if (msg->hdr.flags.server) { - bus->device[dev_no] = dev; - POSTCODE_LINUX_4(DEVICE_CREATE_SUCCESS_PC, dev_no, - bus_no, POSTCODE_SEVERITY_INFO); - return CONTROLVM_RESP_SUCCESS; - } - if (uuid_le_cmp(dev->channel_uuid, - spar_vhba_channel_protocol_uuid) == 0) { - wait_for_valid_guid(&((struct channel_header __iomem *) - (dev->chanptr))->chtype); - if (!SPAR_VHBA_CHANNEL_OK_CLIENT(dev->chanptr)) { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, - dev_no, bus_no, - POSTCODE_SEVERITY_ERR); - result = CONTROLVM_RESP_ERROR_CHANNEL_INVALID; - goto cleanup; - } - cmd.msgtype = GUEST_ADD_VHBA; - cmd.add_vhba.chanptr = dev->chanptr; - cmd.add_vhba.bus_no = bus_no; - cmd.add_vhba.device_no = dev_no; - cmd.add_vhba.instance_uuid = dev->instance_uuid; - cmd.add_vhba.intr = dev->intr; - } else if (uuid_le_cmp(dev->channel_uuid, - spar_vnic_channel_protocol_uuid) == 0) { - wait_for_valid_guid(&((struct channel_header __iomem *) - (dev->chanptr))->chtype); - if (!SPAR_VNIC_CHANNEL_OK_CLIENT(dev->chanptr)) { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, - dev_no, bus_no, - POSTCODE_SEVERITY_ERR); - result = CONTROLVM_RESP_ERROR_CHANNEL_INVALID; - goto cleanup; - } - cmd.msgtype = GUEST_ADD_VNIC; - cmd.add_vnic.chanptr = dev->chanptr; - cmd.add_vnic.bus_no = bus_no; - cmd.add_vnic.device_no = dev_no; - cmd.add_vnic.instance_uuid = dev->instance_uuid; - cmd.add_vhba.intr = dev->intr; - } else { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, - bus_no, POSTCODE_SEVERITY_ERR); - result = CONTROLVM_RESP_ERROR_CHANNEL_TYPE_UNKNOWN; - goto cleanup; - } - - if (!virt_control_chan_func) { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, - bus_no, POSTCODE_SEVERITY_ERR); - result = CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE; - goto cleanup; - } - - if (!virt_control_chan_func(&cmd)) { - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, - bus_no, POSTCODE_SEVERITY_ERR); - result = - CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_CALLBACK_ERROR; - goto cleanup; - } - - bus->device[dev_no] = dev; - POSTCODE_LINUX_4(DEVICE_CREATE_SUCCESS_PC, dev_no, - bus_no, POSTCODE_SEVERITY_INFO); - return CONTROLVM_RESP_SUCCESS; - } - read_unlock(&bus_list_lock); - - POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, - POSTCODE_SEVERITY_ERR); - result = CONTROLVM_RESP_ERROR_BUS_INVALID; - -cleanup: - if (!msg->hdr.flags.test_message) { - uislib_iounmap(dev->chanptr); - dev->chanptr = NULL; - } - - kfree(dev); - return result; -} - -static int pause_device(struct controlvm_message *msg) -{ - u32 bus_no, dev_no; - struct bus_info *bus; - struct device_info *dev; - struct guest_msgs cmd; - int retval = CONTROLVM_RESP_SUCCESS; - - bus_no = msg->cmd.device_change_state.bus_no; - dev_no = msg->cmd.device_change_state.dev_no; - - read_lock(&bus_list_lock); - for (bus = bus_list; bus; bus = bus->next) { - if (bus->bus_no == bus_no) { - /* make sure the device number is valid */ - if (dev_no >= bus->device_count) { - retval = CONTROLVM_RESP_ERROR_DEVICE_INVALID; - } else { - /* make sure this device exists */ - dev = bus->device[dev_no]; - if (!dev) { - retval = - CONTROLVM_RESP_ERROR_ALREADY_DONE; - } - } - break; - } - } - if (!bus) - retval = CONTROLVM_RESP_ERROR_BUS_INVALID; - - read_unlock(&bus_list_lock); - if (retval == CONTROLVM_RESP_SUCCESS) { - /* the msg is bound for virtpci; send - * guest_msgs struct to callback - */ - if (uuid_le_cmp(dev->channel_uuid, - spar_vhba_channel_protocol_uuid) == 0) { - cmd.msgtype = GUEST_PAUSE_VHBA; - cmd.pause_vhba.chanptr = dev->chanptr; - } else if (uuid_le_cmp(dev->channel_uuid, - spar_vnic_channel_protocol_uuid) == 0) { - cmd.msgtype = GUEST_PAUSE_VNIC; - cmd.pause_vnic.chanptr = dev->chanptr; - } else { - return CONTROLVM_RESP_ERROR_CHANNEL_TYPE_UNKNOWN; - } - if (!virt_control_chan_func) - return CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE; - if (!virt_control_chan_func(&cmd)) { - return - CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_CALLBACK_ERROR; - } - } - return retval; -} - -static int resume_device(struct controlvm_message *msg) -{ - u32 bus_no, dev_no; - struct bus_info *bus; - struct device_info *dev; - struct guest_msgs cmd; - int retval = CONTROLVM_RESP_SUCCESS; - - bus_no = msg->cmd.device_change_state.bus_no; - dev_no = msg->cmd.device_change_state.dev_no; - - read_lock(&bus_list_lock); - for (bus = bus_list; bus; bus = bus->next) { - if (bus->bus_no == bus_no) { - /* make sure the device number is valid */ - if (dev_no >= bus->device_count) { - retval = CONTROLVM_RESP_ERROR_DEVICE_INVALID; - } else { - /* make sure this device exists */ - dev = bus->device[dev_no]; - if (!dev) { - retval = - CONTROLVM_RESP_ERROR_ALREADY_DONE; - } - } - break; - } - } - - if (!bus) - retval = CONTROLVM_RESP_ERROR_BUS_INVALID; - - read_unlock(&bus_list_lock); - /* the msg is bound for virtpci; send - * guest_msgs struct to callback - */ - if (retval == CONTROLVM_RESP_SUCCESS) { - if (uuid_le_cmp(dev->channel_uuid, - spar_vhba_channel_protocol_uuid) == 0) { - cmd.msgtype = GUEST_RESUME_VHBA; - cmd.resume_vhba.chanptr = dev->chanptr; - } else if (uuid_le_cmp(dev->channel_uuid, - spar_vnic_channel_protocol_uuid) == 0) { - cmd.msgtype = GUEST_RESUME_VNIC; - cmd.resume_vnic.chanptr = dev->chanptr; - } else { - return CONTROLVM_RESP_ERROR_CHANNEL_TYPE_UNKNOWN; - } - if (!virt_control_chan_func) - return CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE; - if (!virt_control_chan_func(&cmd)) { - return - CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_CALLBACK_ERROR; - } - } - return retval; -} - -static int destroy_device(struct controlvm_message *msg, char *buf) -{ - u32 bus_no, dev_no; - struct bus_info *bus; - struct device_info *dev; - struct guest_msgs cmd; - int retval = CONTROLVM_RESP_SUCCESS; - - bus_no = msg->cmd.destroy_device.bus_no; - dev_no = msg->cmd.destroy_device.bus_no; - - read_lock(&bus_list_lock); - for (bus = bus_list; bus; bus = bus->next) { - if (bus->bus_no == bus_no) { - /* make sure the device number is valid */ - if (dev_no >= bus->device_count) { - retval = CONTROLVM_RESP_ERROR_DEVICE_INVALID; - } else { - /* make sure this device exists */ - dev = bus->device[dev_no]; - if (!dev) { - retval = - CONTROLVM_RESP_ERROR_ALREADY_DONE; - } - } - break; - } - } - - if (!bus) - retval = CONTROLVM_RESP_ERROR_BUS_INVALID; - read_unlock(&bus_list_lock); - if (retval == CONTROLVM_RESP_SUCCESS) { - /* the msg is bound for virtpci; send - * guest_msgs struct to callback - */ - if (uuid_le_cmp(dev->channel_uuid, - spar_vhba_channel_protocol_uuid) == 0) { - cmd.msgtype = GUEST_DEL_VHBA; - cmd.del_vhba.chanptr = dev->chanptr; - } else if (uuid_le_cmp(dev->channel_uuid, - spar_vnic_channel_protocol_uuid) == 0) { - cmd.msgtype = GUEST_DEL_VNIC; - cmd.del_vnic.chanptr = dev->chanptr; - } else { - return - CONTROLVM_RESP_ERROR_CHANNEL_TYPE_UNKNOWN; - } - if (!virt_control_chan_func) { - return - CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_FAILURE; - } - if (!virt_control_chan_func(&cmd)) { - return - CONTROLVM_RESP_ERROR_VIRTPCI_DRIVER_CALLBACK_ERROR; - } -/* you must disable channel interrupts BEFORE you unmap the channel, - * because if you unmap first, there may still be some activity going - * on which accesses the channel and you will get a "unable to handle - * kernel paging request" - */ - if (dev->polling) - uislib_disable_channel_interrupts(bus_no, dev_no); - /* unmap the channel memory for the device. */ - if (!msg->hdr.flags.test_message) - uislib_iounmap(dev->chanptr); - kfree(dev); - bus->device[dev_no] = NULL; - } - return retval; -} - -static int -init_chipset(struct controlvm_message *msg, char *buf) -{ - POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); - - max_bus_count = msg->cmd.init_chipset.bus_count; - platform_no = msg->cmd.init_chipset.platform_number; - phys_data_chan = 0; - - /* We need to make sure we have our functions registered - * before processing messages. If we are a test vehicle the - * test_message for init_chipset will be set. We can ignore the - * waits for the callbacks, since this will be manually entered - * from a user. If no test_message is set, we will wait for the - * functions. - */ - if (!msg->hdr.flags.test_message) - WAIT_ON_CALLBACK(virt_control_chan_func); - - chipset_inited = 1; - POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); - - return CONTROLVM_RESP_SUCCESS; -} - -static int delete_bus_glue(u32 bus_no) -{ - struct controlvm_message msg; - - init_msg_header(&msg, CONTROLVM_BUS_DESTROY, 0, 0); - msg.cmd.destroy_bus.bus_no = bus_no; - if (destroy_bus(&msg, NULL) != CONTROLVM_RESP_SUCCESS) - return 0; - return 1; -} - -static int delete_device_glue(u32 bus_no, u32 dev_no) -{ - struct controlvm_message msg; - - init_msg_header(&msg, CONTROLVM_DEVICE_DESTROY, 0, 0); - msg.cmd.destroy_device.bus_no = bus_no; - msg.cmd.destroy_device.dev_no = dev_no; - if (destroy_device(&msg, NULL) != CONTROLVM_RESP_SUCCESS) - return 0; - return 1; -} - -int -uislib_client_inject_add_bus(u32 bus_no, uuid_le inst_uuid, - u64 channel_addr, ulong n_channel_bytes) -{ - struct controlvm_message msg; - - /* step 0: init the chipset */ - POSTCODE_LINUX_3(CHIPSET_INIT_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); - - if (!chipset_inited) { - /* step: initialize the chipset */ - init_msg_header(&msg, CONTROLVM_CHIPSET_INIT, 0, 0); - /* this change is needed so that console will come up - * OK even when the bus 0 create comes in late. If the - * bus 0 create is the first create, then the add_vnic - * will work fine, but if the bus 0 create arrives - * after number 4, then the add_vnic will fail, and the - * ultraboot will fail. - */ - msg.cmd.init_chipset.bus_count = 23; - msg.cmd.init_chipset.switch_count = 0; - if (init_chipset(&msg, NULL) != CONTROLVM_RESP_SUCCESS) - return 0; - POSTCODE_LINUX_3(CHIPSET_INIT_EXIT_PC, bus_no, - POSTCODE_SEVERITY_INFO); - } - - /* step 1: create a bus */ - POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, - POSTCODE_SEVERITY_WARNING); - init_msg_header(&msg, CONTROLVM_BUS_CREATE, 0, 0); - msg.cmd.create_bus.bus_no = bus_no; - msg.cmd.create_bus.dev_count = 23; /* devNo+1; */ - msg.cmd.create_bus.channel_addr = channel_addr; - msg.cmd.create_bus.channel_bytes = n_channel_bytes; - if (create_bus(&msg, NULL) != CONTROLVM_RESP_SUCCESS) { - POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, - POSTCODE_SEVERITY_ERR); - return 0; - } - POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); - - return 1; -} -EXPORT_SYMBOL_GPL(uislib_client_inject_add_bus); - -int -uislib_client_inject_del_bus(u32 bus_no) -{ - return delete_bus_glue(bus_no); -} -EXPORT_SYMBOL_GPL(uislib_client_inject_del_bus); - -int -uislib_client_inject_pause_vhba(u32 bus_no, u32 dev_no) -{ - struct controlvm_message msg; - int rc; - - init_msg_header(&msg, CONTROLVM_DEVICE_CHANGESTATE, 0, 0); - msg.cmd.device_change_state.bus_no = bus_no; - msg.cmd.device_change_state.dev_no = dev_no; - msg.cmd.device_change_state.state = segment_state_standby; - rc = pause_device(&msg); - if (rc != CONTROLVM_RESP_SUCCESS) - return rc; - return 0; -} -EXPORT_SYMBOL_GPL(uislib_client_inject_pause_vhba); - -int -uislib_client_inject_resume_vhba(u32 bus_no, u32 dev_no) -{ - struct controlvm_message msg; - int rc; - - init_msg_header(&msg, CONTROLVM_DEVICE_CHANGESTATE, 0, 0); - msg.cmd.device_change_state.bus_no = bus_no; - msg.cmd.device_change_state.dev_no = dev_no; - msg.cmd.device_change_state.state = segment_state_running; - rc = resume_device(&msg); - if (rc != CONTROLVM_RESP_SUCCESS) - return rc; - return 0; -} -EXPORT_SYMBOL_GPL(uislib_client_inject_resume_vhba); - -int -uislib_client_inject_add_vhba(u32 bus_no, u32 dev_no, - u64 phys_chan_addr, u32 chan_bytes, - int is_test_addr, uuid_le inst_uuid, - struct irq_info *intr) -{ - struct controlvm_message msg; - - /* chipset init'ed with bus bus has been previously created - - * Verify it still exists step 2: create the VHBA device on the - * bus - */ - POSTCODE_LINUX_4(VHBA_CREATE_ENTRY_PC, dev_no, bus_no, - POSTCODE_SEVERITY_INFO); - - init_msg_header(&msg, CONTROLVM_DEVICE_CREATE, 0, 0); - if (is_test_addr) - /* signify that the physical channel address does NOT - * need to be ioremap()ed - */ - msg.hdr.flags.test_message = 1; - msg.cmd.create_device.bus_no = bus_no; - msg.cmd.create_device.dev_no = dev_no; - msg.cmd.create_device.dev_inst_uuid = inst_uuid; - if (intr) - msg.cmd.create_device.intr = *intr; - else - memset(&msg.cmd.create_device.intr, 0, - sizeof(struct irq_info)); - msg.cmd.create_device.channel_addr = phys_chan_addr; - if (chan_bytes < MIN_IO_CHANNEL_SIZE) { - POSTCODE_LINUX_4(VHBA_CREATE_FAILURE_PC, chan_bytes, - MIN_IO_CHANNEL_SIZE, POSTCODE_SEVERITY_ERR); - return 0; - } - msg.cmd.create_device.channel_bytes = chan_bytes; - msg.cmd.create_device.data_type_uuid = spar_vhba_channel_protocol_uuid; - if (create_device(&msg, NULL) != CONTROLVM_RESP_SUCCESS) { - POSTCODE_LINUX_4(VHBA_CREATE_FAILURE_PC, dev_no, bus_no, - POSTCODE_SEVERITY_ERR); - return 0; - } - POSTCODE_LINUX_4(VHBA_CREATE_SUCCESS_PC, dev_no, bus_no, - POSTCODE_SEVERITY_INFO); - return 1; -} -EXPORT_SYMBOL_GPL(uislib_client_inject_add_vhba); - -int -uislib_client_inject_del_vhba(u32 bus_no, u32 dev_no) -{ - return delete_device_glue(bus_no, dev_no); -} -EXPORT_SYMBOL_GPL(uislib_client_inject_del_vhba); - -int -uislib_client_inject_add_vnic(u32 bus_no, u32 dev_no, - u64 phys_chan_addr, u32 chan_bytes, - int is_test_addr, uuid_le inst_uuid, - struct irq_info *intr) -{ - struct controlvm_message msg; - - /* chipset init'ed with bus bus has been previously created - - * Verify it still exists step 2: create the VNIC device on the - * bus - */ - POSTCODE_LINUX_4(VNIC_CREATE_ENTRY_PC, dev_no, bus_no, - POSTCODE_SEVERITY_INFO); - - init_msg_header(&msg, CONTROLVM_DEVICE_CREATE, 0, 0); - if (is_test_addr) - /* signify that the physical channel address does NOT - * need to be ioremap()ed - */ - msg.hdr.flags.test_message = 1; - msg.cmd.create_device.bus_no = bus_no; - msg.cmd.create_device.dev_no = dev_no; - msg.cmd.create_device.dev_inst_uuid = inst_uuid; - if (intr) - msg.cmd.create_device.intr = *intr; - else - memset(&msg.cmd.create_device.intr, 0, - sizeof(struct irq_info)); - msg.cmd.create_device.channel_addr = phys_chan_addr; - if (chan_bytes < MIN_IO_CHANNEL_SIZE) { - POSTCODE_LINUX_4(VNIC_CREATE_FAILURE_PC, chan_bytes, - MIN_IO_CHANNEL_SIZE, POSTCODE_SEVERITY_ERR); - return 0; - } - msg.cmd.create_device.channel_bytes = chan_bytes; - msg.cmd.create_device.data_type_uuid = spar_vnic_channel_protocol_uuid; - if (create_device(&msg, NULL) != CONTROLVM_RESP_SUCCESS) { - POSTCODE_LINUX_4(VNIC_CREATE_FAILURE_PC, dev_no, bus_no, - POSTCODE_SEVERITY_ERR); - return 0; - } - - POSTCODE_LINUX_4(VNIC_CREATE_SUCCESS_PC, dev_no, bus_no, - POSTCODE_SEVERITY_INFO); - return 1; -} -EXPORT_SYMBOL_GPL(uislib_client_inject_add_vnic); - -int -uislib_client_inject_pause_vnic(u32 bus_no, u32 dev_no) -{ - struct controlvm_message msg; - int rc; - - init_msg_header(&msg, CONTROLVM_DEVICE_CHANGESTATE, 0, 0); - msg.cmd.device_change_state.bus_no = bus_no; - msg.cmd.device_change_state.dev_no = dev_no; - msg.cmd.device_change_state.state = segment_state_standby; - rc = pause_device(&msg); - if (rc != CONTROLVM_RESP_SUCCESS) - return -1; - return 0; -} -EXPORT_SYMBOL_GPL(uislib_client_inject_pause_vnic); - -int -uislib_client_inject_resume_vnic(u32 bus_no, u32 dev_no) -{ - struct controlvm_message msg; - int rc; - - init_msg_header(&msg, CONTROLVM_DEVICE_CHANGESTATE, 0, 0); - msg.cmd.device_change_state.bus_no = bus_no; - msg.cmd.device_change_state.dev_no = dev_no; - msg.cmd.device_change_state.state = segment_state_running; - rc = resume_device(&msg); - if (rc != CONTROLVM_RESP_SUCCESS) - return -1; - return 0; -} -EXPORT_SYMBOL_GPL(uislib_client_inject_resume_vnic); - -int -uislib_client_inject_del_vnic(u32 bus_no, u32 dev_no) -{ - return delete_device_glue(bus_no, dev_no); -} -EXPORT_SYMBOL_GPL(uislib_client_inject_del_vnic); - -void * -uislib_cache_alloc(struct kmem_cache *cur_pool, char *fn, int ln) -{ - /* __GFP_NORETRY means "ok to fail", meaning kmalloc() can - * return NULL. If you do NOT specify __GFP_NORETRY, Linux - * will go to extreme measures to get memory for you (like, - * invoke oom killer), which will probably cripple the system. - */ - void *p = kmem_cache_alloc(cur_pool, GFP_ATOMIC | __GFP_NORETRY); - - if (!p) - return NULL; - return p; -} -EXPORT_SYMBOL_GPL(uislib_cache_alloc); - -void -uislib_cache_free(struct kmem_cache *cur_pool, void *p, char *fn, int ln) -{ - if (!p) - return; - kmem_cache_free(cur_pool, p); -} -EXPORT_SYMBOL_GPL(uislib_cache_free); - -/*****************************************************/ -/* proc filesystem callback functions */ -/*****************************************************/ - -#define PLINE(...) uisutil_add_proc_line_ex(&tot, buff, \ - buff_len, __VA_ARGS__) - -static int -info_debugfs_read_helper(char **buff, int *buff_len) -{ - int i, tot = 0; - struct bus_info *bus; - - if (PLINE("\nBuses:\n") < 0) - goto err_done; - - read_lock(&bus_list_lock); - for (bus = bus_list; bus; bus = bus->next) { - if (PLINE(" bus=0x%p, busNo=%d, deviceCount=%d\n", - bus, bus->bus_no, bus->device_count) < 0) - goto err_done_unlock; - - if (PLINE(" Devices:\n") < 0) - goto err_done_unlock; - - for (i = 0; i < bus->device_count; i++) { - if (bus->device[i]) { - if (PLINE(" busNo %d, device[%i]: 0x%p, chanptr=0x%p, swtch=0x%p\n", - bus->bus_no, i, bus->device[i], - bus->device[i]->chanptr, - bus->device[i]->swtch) < 0) - goto err_done_unlock; - - if (PLINE(" first_busy_cnt=%llu, moved_to_tail_cnt=%llu, last_on_list_cnt=%llu\n", - bus->device[i]->first_busy_cnt, - bus->device[i]->moved_to_tail_cnt, - bus->device[i]->last_on_list_cnt) < 0) - goto err_done_unlock; - } - } - } - read_unlock(&bus_list_lock); - - if (PLINE("UisUtils_Registered_Services: %d\n", - atomic_read(&uisutils_registered_services)) < 0) - goto err_done; - if (PLINE("cycles_before_wait %llu wait_cycles:%llu\n", - cycles_before_wait, wait_cycles) < 0) - goto err_done; - if (PLINE("tot_wakeup_cnt %llu:tot_wait_cnt %llu:tot_schedule_cnt %llu\n", - tot_wakeup_cnt, tot_wait_cnt, tot_schedule_cnt) < 0) - goto err_done; - if (PLINE("en_smart_wakeup %d\n", en_smart_wakeup) < 0) - goto err_done; - if (PLINE("tot_moved_to_tail_cnt %llu\n", tot_moved_to_tail_cnt) < 0) - goto err_done; - - return tot; - -err_done_unlock: - read_unlock(&bus_list_lock); -err_done: - return -1; -} - -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset) -{ - char *temp; - int total_bytes = 0; - int remaining_bytes = PROC_READ_BUFFER_SIZE; - -/* *start = buf; */ - if (!debug_buf) { - debug_buf = vmalloc(PROC_READ_BUFFER_SIZE); - - if (!debug_buf) - return -ENOMEM; - } - - temp = debug_buf; - - if ((*offset == 0) || (!debug_buf_valid)) { - /* if the read fails, then -1 will be returned */ - total_bytes = info_debugfs_read_helper(&temp, &remaining_bytes); - debug_buf_valid = 1; - } else { - total_bytes = strlen(debug_buf); - } - - return simple_read_from_buffer(buf, len, offset, - debug_buf, total_bytes); -} - -static struct device_info *find_dev(u32 bus_no, u32 dev_no) -{ - struct bus_info *bus; - struct device_info *dev = NULL; - - read_lock(&bus_list_lock); - for (bus = bus_list; bus; bus = bus->next) { - if (bus->bus_no == bus_no) { - /* make sure the device number is valid */ - if (dev_no >= bus->device_count) - break; - dev = bus->device[dev_no]; - break; - } - } - read_unlock(&bus_list_lock); - return dev; -} - -/* This thread calls the "interrupt" function for each device that has - * enabled such using uislib_enable_channel_interrupts(). The "interrupt" - * function typically reads and processes the devices's channel input - * queue. This thread repeatedly does this, until the thread is told to stop - * (via uisthread_stop()). Sleeping rules: - * - If we have called the "interrupt" function for all devices, and all of - * them have reported "nothing processed" (returned 0), then we will go to - * sleep for a maximum of POLLJIFFIES_NORMAL jiffies. - * - If anyone calls uislib_force_channel_interrupt(), the above jiffy - * sleep will be interrupted, and we will resume calling the "interrupt" - * function for all devices. - * - The list of devices is dynamically re-ordered in order to - * attempt to preserve fairness. Whenever we spin thru the list of - * devices and call the dev->interrupt() function, if we find - * devices which report that there is still more work to do, the - * the first such device we find is moved to the end of the device - * list. This ensures that extremely busy devices don't starve out - * less-busy ones. - * - */ -static int process_incoming(void *v) -{ - unsigned long long cur_cycles, old_cycles, idle_cycles, delta_cycles; - struct list_head *new_tail = NULL; - int i; - - UIS_DAEMONIZE("dev_incoming"); - for (i = 0; i < 16; i++) { - old_cycles = get_cycles(); - wait_event_timeout(poll_dev_wake_q, - 0, POLLJIFFIES_NORMAL); - cur_cycles = get_cycles(); - if (wait_cycles == 0) { - wait_cycles = (cur_cycles - old_cycles); - } else { - if (wait_cycles < (cur_cycles - old_cycles)) - wait_cycles = (cur_cycles - old_cycles); - } - } - cycles_before_wait = wait_cycles; - idle_cycles = 0; - poll_dev_start = 0; - while (1) { - struct list_head *lelt, *tmp; - struct device_info *dev = NULL; - - /* poll each channel for input */ - down(&poll_dev_lock); - new_tail = NULL; - list_for_each_safe(lelt, tmp, &poll_dev_chan) { - int rc = 0; - - dev = list_entry(lelt, struct device_info, - list_polling_device_channels); - down(&dev->interrupt_callback_lock); - if (dev->interrupt) - rc = dev->interrupt(dev->interrupt_context); - else - continue; - up(&dev->interrupt_callback_lock); - if (rc) { - /* dev->interrupt returned, but there - * is still more work to do. - * Reschedule work to occur as soon as - * possible. */ - idle_cycles = 0; - if (!new_tail) { - dev->first_busy_cnt++; - if (! - (list_is_last - (lelt, - &poll_dev_chan))) { - new_tail = lelt; - dev->moved_to_tail_cnt++; - } else { - dev->last_on_list_cnt++; - } - } - } - if (kthread_should_stop()) - break; - } - if (new_tail) { - tot_moved_to_tail_cnt++; - list_move_tail(new_tail, &poll_dev_chan); - } - up(&poll_dev_lock); - cur_cycles = get_cycles(); - delta_cycles = cur_cycles - old_cycles; - old_cycles = cur_cycles; - - /* At this point, we have scanned thru all of the - * channels, and at least one of the following is true: - * - there is no input waiting on any of the channels - * - we have received a signal to stop this thread - */ - if (kthread_should_stop()) - break; - if (en_smart_wakeup == 0xFF) - break; - /* wait for POLLJIFFIES_NORMAL jiffies, or until - * someone wakes up poll_dev_wake_q, - * whichever comes first only do a wait when we have - * been idle for cycles_before_wait cycles. - */ - if (idle_cycles > cycles_before_wait) { - poll_dev_start = 0; - tot_wait_cnt++; - wait_event_timeout(poll_dev_wake_q, - poll_dev_start, - POLLJIFFIES_NORMAL); - poll_dev_start = 1; - } else { - tot_schedule_cnt++; - schedule(); - idle_cycles = idle_cycles + delta_cycles; - } - } - complete_and_exit(&incoming_ti.has_stopped, 0); -} - -static BOOL -initialize_incoming_thread(void) -{ - if (incoming_started) - return TRUE; - if (!uisthread_start(&incoming_ti, - &process_incoming, NULL, "dev_incoming")) { - return FALSE; - } - incoming_started = TRUE; - return TRUE; -} - -/* Add a new device/channel to the list being processed by - * process_incoming(). - * <interrupt> - indicates the function to call periodically. - * <interrupt_context> - indicates the data to pass to the <interrupt> - * function. - */ -void -uislib_enable_channel_interrupts(u32 bus_no, u32 dev_no, - int (*interrupt)(void *), - void *interrupt_context) -{ - struct device_info *dev; - - dev = find_dev(bus_no, dev_no); - if (!dev) - return; - - down(&poll_dev_lock); - initialize_incoming_thread(); - dev->interrupt = interrupt; - dev->interrupt_context = interrupt_context; - dev->polling = TRUE; - list_add_tail(&dev->list_polling_device_channels, - &poll_dev_chan); - up(&poll_dev_lock); -} -EXPORT_SYMBOL_GPL(uislib_enable_channel_interrupts); - -/* Remove a device/channel from the list being processed by - * process_incoming(). - */ -void -uislib_disable_channel_interrupts(u32 bus_no, u32 dev_no) -{ - struct device_info *dev; - - dev = find_dev(bus_no, dev_no); - if (!dev) - return; - down(&poll_dev_lock); - list_del(&dev->list_polling_device_channels); - dev->polling = FALSE; - dev->interrupt = NULL; - up(&poll_dev_lock); -} -EXPORT_SYMBOL_GPL(uislib_disable_channel_interrupts); - -static void -do_wakeup_polling_device_channels(struct work_struct *dummy) -{ - if (!poll_dev_start) { - poll_dev_start = 1; - wake_up(&poll_dev_wake_q); - } -} - -static DECLARE_WORK(work_wakeup_polling_device_channels, - do_wakeup_polling_device_channels); - -/* Call this function when you want to send a hint to process_incoming() that - * your device might have more requests. - */ -void -uislib_force_channel_interrupt(u32 bus_no, u32 dev_no) -{ - if (en_smart_wakeup == 0) - return; - if (poll_dev_start) - return; - /* The point of using schedule_work() instead of just doing - * the work inline is to force a slight delay before waking up - * the process_incoming() thread. - */ - tot_wakeup_cnt++; - schedule_work(&work_wakeup_polling_device_channels); -} -EXPORT_SYMBOL_GPL(uislib_force_channel_interrupt); - -/*****************************************************/ -/* Module Init & Exit functions */ -/*****************************************************/ - -static int __init -uislib_mod_init(void) -{ - if (!unisys_spar_platform) - return -ENODEV; - - /* initialize global pointers to NULL */ - bus_list = NULL; - bus_list_count = 0; - max_bus_count = 0; - rwlock_init(&bus_list_lock); - virt_control_chan_func = NULL; - - /* Issue VMCALL_GET_CONTROLVM_ADDR to get CtrlChanPhysAddr and - * then map this physical address to a virtual address. */ - POSTCODE_LINUX_2(DRIVER_ENTRY_PC, POSTCODE_SEVERITY_INFO); - - dir_debugfs = debugfs_create_dir(DIR_DEBUGFS_ENTRY, NULL); - if (dir_debugfs) { - info_debugfs_entry = debugfs_create_file( - INFO_DEBUGFS_ENTRY_FN, 0444, dir_debugfs, NULL, - &debugfs_info_fops); - - platformnumber_debugfs_read = debugfs_create_u32( - PLATFORMNUMBER_DEBUGFS_ENTRY_FN, 0444, dir_debugfs, - &platform_no); - - cycles_before_wait_debugfs_read = debugfs_create_u64( - CYCLES_BEFORE_WAIT_DEBUGFS_ENTRY_FN, 0666, dir_debugfs, - &cycles_before_wait); - - smart_wakeup_debugfs_entry = debugfs_create_bool( - SMART_WAKEUP_DEBUGFS_ENTRY_FN, 0666, dir_debugfs, - &en_smart_wakeup); - } - - POSTCODE_LINUX_3(DRIVER_EXIT_PC, 0, POSTCODE_SEVERITY_INFO); - return 0; -} - -static void __exit -uislib_mod_exit(void) -{ - if (debug_buf) { - vfree(debug_buf); - debug_buf = NULL; - } - - debugfs_remove(info_debugfs_entry); - debugfs_remove(smart_wakeup_debugfs_entry); - debugfs_remove(cycles_before_wait_debugfs_read); - debugfs_remove(platformnumber_debugfs_read); - debugfs_remove(dir_debugfs); -} - -module_init(uislib_mod_init); -module_exit(uislib_mod_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Usha Srinivasan"); -MODULE_ALIAS("uislib"); - /* this is extracted during depmod and kept in modules.dep */ diff --git a/drivers/staging/unisys/uislib/uisqueue.c b/drivers/staging/unisys/uislib/uisqueue.c deleted file mode 100644 index d46dd7428..000000000 --- a/drivers/staging/unisys/uislib/uisqueue.c +++ /dev/null @@ -1,322 +0,0 @@ -/* uisqueue.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* @ALL_INSPECTED */ -#include <linux/kernel.h> -#include <linux/module.h> - -#include "uisutils.h" - -/* this is shorter than using __FILE__ (full path name) in - * debug/info/error messages */ -#define CURRENT_FILE_PC UISLIB_PC_uisqueue_c -#define __MYFILE__ "uisqueue.c" - -#define CHECK_CACHE_ALIGN 0 - -/*****************************************************/ -/* Exported functions */ -/*****************************************************/ - -/* - * Routine Description: - * Tries to insert the prebuilt signal pointed to by pSignal into the nth - * Queue of the Channel pointed to by pChannel - * - * Parameters: - * pChannel: (IN) points to the IO Channel - * Queue: (IN) nth Queue of the IO Channel - * pSignal: (IN) pointer to the signal - * - * Assumptions: - * - pChannel, Queue and pSignal are valid. - * - If insertion fails due to a full queue, the caller will determine the - * retry policy (e.g. wait & try again, report an error, etc.). - * - * Return value: - * 1 if the insertion succeeds, 0 if the queue was full. - */ -unsigned char spar_signal_insert(struct channel_header __iomem *ch, u32 queue, - void *sig) -{ - void __iomem *psignal; - unsigned int head, tail, nof; - - struct signal_queue_header __iomem *pqhdr = - (struct signal_queue_header __iomem *) - ((char __iomem *)ch + readq(&ch->ch_space_offset)) - + queue; - - /* capture current head and tail */ - head = readl(&pqhdr->head); - tail = readl(&pqhdr->tail); - - /* queue is full if (head + 1) % n equals tail */ - if (((head + 1) % readl(&pqhdr->max_slots)) == tail) { - nof = readq(&pqhdr->num_overflows) + 1; - writeq(nof, &pqhdr->num_overflows); - return 0; - } - - /* increment the head index */ - head = (head + 1) % readl(&pqhdr->max_slots); - - /* copy signal to the head location from the area pointed to - * by pSignal - */ - psignal = (char __iomem *)pqhdr + readq(&pqhdr->sig_base_offset) + - (head * readl(&pqhdr->signal_size)); - memcpy_toio(psignal, sig, readl(&pqhdr->signal_size)); - - mb(); /* channel synch */ - writel(head, &pqhdr->head); - - writeq(readq(&pqhdr->num_sent) + 1, &pqhdr->num_sent); - return 1; -} -EXPORT_SYMBOL_GPL(spar_signal_insert); - -/* - * Routine Description: - * Removes one signal from Channel pChannel's nth Queue at the - * time of the call and copies it into the memory pointed to by - * pSignal. - * - * Parameters: - * pChannel: (IN) points to the IO Channel - * Queue: (IN) nth Queue of the IO Channel - * pSignal: (IN) pointer to where the signals are to be copied - * - * Assumptions: - * - pChannel and Queue are valid. - * - pSignal points to a memory area large enough to hold queue's SignalSize - * - * Return value: - * 1 if the removal succeeds, 0 if the queue was empty. - */ -unsigned char -spar_signal_remove(struct channel_header __iomem *ch, u32 queue, void *sig) -{ - void __iomem *psource; - unsigned int head, tail; - struct signal_queue_header __iomem *pqhdr = - (struct signal_queue_header __iomem *)((char __iomem *)ch + - readq(&ch->ch_space_offset)) + queue; - - /* capture current head and tail */ - head = readl(&pqhdr->head); - tail = readl(&pqhdr->tail); - - /* queue is empty if the head index equals the tail index */ - if (head == tail) { - writeq(readq(&pqhdr->num_empty) + 1, &pqhdr->num_empty); - return 0; - } - - /* advance past the 'empty' front slot */ - tail = (tail + 1) % readl(&pqhdr->max_slots); - - /* copy signal from tail location to the area pointed to by pSignal */ - psource = (char __iomem *)pqhdr + readq(&pqhdr->sig_base_offset) + - (tail * readl(&pqhdr->signal_size)); - memcpy_fromio(sig, psource, readl(&pqhdr->signal_size)); - - mb(); /* channel synch */ - writel(tail, &pqhdr->tail); - - writeq(readq(&pqhdr->num_received) + 1, - &pqhdr->num_received); - return 1; -} -EXPORT_SYMBOL_GPL(spar_signal_remove); - -/* - * Routine Description: - * Removes all signals present in Channel pChannel's nth Queue at the - * time of the call and copies them into the memory pointed to by - * pSignal. Returns the # of signals copied as the value of the routine. - * - * Parameters: - * pChannel: (IN) points to the IO Channel - * Queue: (IN) nth Queue of the IO Channel - * pSignal: (IN) pointer to where the signals are to be copied - * - * Assumptions: - * - pChannel and Queue are valid. - * - pSignal points to a memory area large enough to hold Queue's MaxSignals - * # of signals, each of which is Queue's SignalSize. - * - * Return value: - * # of signals copied. - */ -unsigned int spar_signal_remove_all(struct channel_header *ch, u32 queue, - void *sig) -{ - void *psource; - unsigned int head, tail, count = 0; - struct signal_queue_header *pqhdr = - (struct signal_queue_header *)((char *)ch + - ch->ch_space_offset) + queue; - - /* capture current head and tail */ - head = pqhdr->head; - tail = pqhdr->tail; - - /* queue is empty if the head index equals the tail index */ - if (head == tail) - return 0; - - while (head != tail) { - /* advance past the 'empty' front slot */ - tail = (tail + 1) % pqhdr->max_slots; - - /* copy signal from tail location to the area pointed - * to by pSignal - */ - psource = - (char *)pqhdr + pqhdr->sig_base_offset + - (tail * pqhdr->signal_size); - memcpy((char *)sig + (pqhdr->signal_size * count), - psource, pqhdr->signal_size); - - mb(); /* channel synch */ - pqhdr->tail = tail; - - count++; - pqhdr->num_received++; - } - - return count; -} - -/* - * Routine Description: - * Determine whether a signal queue is empty. - * - * Parameters: - * pChannel: (IN) points to the IO Channel - * Queue: (IN) nth Queue of the IO Channel - * - * Return value: - * 1 if the signal queue is empty, 0 otherwise. - */ -unsigned char spar_signalqueue_empty(struct channel_header __iomem *ch, - u32 queue) -{ - struct signal_queue_header __iomem *pqhdr = - (struct signal_queue_header __iomem *)((char __iomem *)ch + - readq(&ch->ch_space_offset)) + queue; - return readl(&pqhdr->head) == readl(&pqhdr->tail); -} -EXPORT_SYMBOL_GPL(spar_signalqueue_empty); - -unsigned long long -uisqueue_interlocked_or(unsigned long long __iomem *tgt, - unsigned long long set) -{ - unsigned long long i; - unsigned long long j; - - j = readq(tgt); - do { - i = j; - j = cmpxchg((__force unsigned long long *)tgt, i, i | set); - - } while (i != j); - - return j; -} -EXPORT_SYMBOL_GPL(uisqueue_interlocked_or); - -unsigned long long -uisqueue_interlocked_and(unsigned long long __iomem *tgt, - unsigned long long set) -{ - unsigned long long i; - unsigned long long j; - - j = readq(tgt); - do { - i = j; - j = cmpxchg((__force unsigned long long *)tgt, i, i & set); - - } while (i != j); - - return j; -} -EXPORT_SYMBOL_GPL(uisqueue_interlocked_and); - -static u8 -do_locked_client_insert(struct uisqueue_info *queueinfo, - unsigned int whichqueue, - void *signal, - spinlock_t *lock, - u8 *channel_id) -{ - unsigned long flags; - u8 rc = 0; - - spin_lock_irqsave(lock, flags); - if (!spar_channel_client_acquire_os(queueinfo->chan, channel_id)) - goto unlock; - if (spar_signal_insert(queueinfo->chan, whichqueue, signal)) { - queueinfo->packets_sent++; - rc = 1; - } - spar_channel_client_release_os(queueinfo->chan, channel_id); -unlock: - spin_unlock_irqrestore((spinlock_t *)lock, flags); - return rc; -} - -int -uisqueue_put_cmdrsp_with_lock_client(struct uisqueue_info *queueinfo, - struct uiscmdrsp *cmdrsp, - unsigned int whichqueue, - void *insertlock, - unsigned char issue_irq_if_empty, - u64 irq_handle, - char oktowait, u8 *channel_id) -{ - while (!do_locked_client_insert(queueinfo, whichqueue, cmdrsp, - (spinlock_t *)insertlock, - channel_id)) { - if (oktowait != OK_TO_WAIT) - return 0; /* failed to queue */ - - /* try again */ - set_current_state(TASK_INTERRUPTIBLE); - schedule_timeout(msecs_to_jiffies(10)); - } - return 1; -} -EXPORT_SYMBOL_GPL(uisqueue_put_cmdrsp_with_lock_client); - -/* uisqueue_get_cmdrsp gets the cmdrsp entry at the head of the queue - * returns NULL if queue is empty */ -int -uisqueue_get_cmdrsp(struct uisqueue_info *queueinfo, - void *cmdrsp, unsigned int whichqueue) -{ - if (!spar_signal_remove(queueinfo->chan, whichqueue, cmdrsp)) - return 0; - - queueinfo->packets_received++; - - return 1; /* Success */ -} -EXPORT_SYMBOL_GPL(uisqueue_get_cmdrsp); diff --git a/drivers/staging/unisys/uislib/uisthread.c b/drivers/staging/unisys/uislib/uisthread.c deleted file mode 100644 index d3c973b61..000000000 --- a/drivers/staging/unisys/uislib/uisthread.c +++ /dev/null @@ -1,69 +0,0 @@ -/* uisthread.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* @ALL_INSPECTED */ -#include <asm/processor.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/kthread.h> -#include "uisutils.h" -#include "uisthread.h" - -/* this is shorter than using __FILE__ (full path name) in - * debug/info/error messages - */ -#define CURRENT_FILE_PC UISLIB_PC_uisthread_c -#define __MYFILE__ "uisthread.c" - -/*****************************************************/ -/* Exported functions */ -/*****************************************************/ - -/* returns 0 for failure, 1 for success */ -int -uisthread_start(struct uisthread_info *thrinfo, - int (*threadfn)(void *), void *thrcontext, char *name) -{ - /* used to stop the thread */ - init_completion(&thrinfo->has_stopped); - thrinfo->task = kthread_run(threadfn, thrcontext, name); - if (IS_ERR(thrinfo->task)) { - thrinfo->id = 0; - return 0; /* failure */ - } - thrinfo->id = thrinfo->task->pid; - return 1; -} -EXPORT_SYMBOL_GPL(uisthread_start); - -void -uisthread_stop(struct uisthread_info *thrinfo) -{ - int stopped = 0; - - if (thrinfo->id == 0) - return; /* thread not running */ - - kthread_stop(thrinfo->task); - /* give up if the thread has NOT died in 1 minute */ - if (wait_for_completion_timeout(&thrinfo->has_stopped, 60 * HZ)) - stopped = 1; - - if (stopped) - thrinfo->id = 0; -} -EXPORT_SYMBOL_GPL(uisthread_stop); diff --git a/drivers/staging/unisys/uislib/uisutils.c b/drivers/staging/unisys/uislib/uisutils.c deleted file mode 100644 index 26ab76526..000000000 --- a/drivers/staging/unisys/uislib/uisutils.c +++ /dev/null @@ -1,137 +0,0 @@ -/* uisutils.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/uuid.h> -#include <linux/spinlock.h> -#include <linux/list.h> -#include "uisutils.h" -#include "version.h" -#include "vbushelper.h" -#include <linux/skbuff.h> -#ifdef CONFIG_HIGHMEM -#include <linux/highmem.h> -#endif - -/* this is shorter than using __FILE__ (full path name) in - * debug/info/error messages - */ -#define CURRENT_FILE_PC UISLIB_PC_uisutils_c -#define __MYFILE__ "uisutils.c" - -/* exports */ -atomic_t uisutils_registered_services = ATOMIC_INIT(0); - /* num registrations via - * uisctrl_register_req_handler() or - * uisctrl_register_req_handler_ex() */ - -/*****************************************************/ -/* Utility functions */ -/*****************************************************/ - -int -uisutil_add_proc_line_ex(int *total, char **buffer, int *buffer_remaining, - char *format, ...) -{ - va_list args; - int len; - - va_start(args, format); - len = vsnprintf(*buffer, *buffer_remaining, format, args); - va_end(args); - if (len >= *buffer_remaining) { - *buffer += *buffer_remaining; - *total += *buffer_remaining; - *buffer_remaining = 0; - return -1; - } - *buffer_remaining -= len; - *buffer += len; - *total += len; - return len; -} -EXPORT_SYMBOL_GPL(uisutil_add_proc_line_ex); - -int -uisctrl_register_req_handler(int type, void *fptr, - struct ultra_vbus_deviceinfo *chipset_driver_info) -{ - switch (type) { - case 2: - if (fptr) { - if (!virt_control_chan_func) - atomic_inc(&uisutils_registered_services); - virt_control_chan_func = fptr; - } else { - if (virt_control_chan_func) - atomic_dec(&uisutils_registered_services); - virt_control_chan_func = NULL; - } - break; - - default: - return 0; - } - if (chipset_driver_info) - bus_device_info_init(chipset_driver_info, "chipset", "uislib", - VERSION, NULL); - - return 1; -} -EXPORT_SYMBOL_GPL(uisctrl_register_req_handler); - -/* - * unsigned int uisutil_copy_fragsinfo_from_skb(unsigned char *calling_ctx, - * void *skb_in, - * unsigned int firstfraglen, - * unsigned int frags_max, - * struct phys_info frags[]) - * - * calling_ctx - input - a string that is displayed to show - * who called * this func - * void *skb_in - skb whose frag info we're copying type is hidden so we - * don't need to include skbbuff in uisutils.h which is - * included in non-networking code. - * unsigned int firstfraglen - input - length of first fragment in skb - * unsigned int frags_max - input - max len of frags array - * struct phys_info frags[] - output - frags array filled in on output - * return value indicates number of - * entries filled in frags - */ - -static LIST_HEAD(req_handler_info_list); /* list of struct req_handler_info */ -static DEFINE_SPINLOCK(req_handler_info_list_lock); - -struct req_handler_info * -req_handler_find(uuid_le switch_uuid) -{ - struct list_head *lelt, *tmp; - struct req_handler_info *entry = NULL; - - spin_lock(&req_handler_info_list_lock); - list_for_each_safe(lelt, tmp, &req_handler_info_list) { - entry = list_entry(lelt, struct req_handler_info, list_link); - if (uuid_le_cmp(entry->switch_uuid, switch_uuid) == 0) { - spin_unlock(&req_handler_info_list_lock); - return entry; - } - } - spin_unlock(&req_handler_info_list_lock); - return NULL; -} diff --git a/drivers/staging/unisys/virthba/Kconfig b/drivers/staging/unisys/virthba/Kconfig deleted file mode 100644 index dfadfc491..000000000 --- a/drivers/staging/unisys/virthba/Kconfig +++ /dev/null @@ -1,13 +0,0 @@ -# -# Unisys virthba configuration -# - -config UNISYS_VIRTHBA - tristate "Unisys virthba driver" - depends on SCSI - select UNISYS_VISORCHIPSET - select UNISYS_UISLIB - select UNISYS_VIRTPCI - ---help--- - If you say Y here, you will enable the Unisys virthba driver. - diff --git a/drivers/staging/unisys/virthba/Makefile b/drivers/staging/unisys/virthba/Makefile deleted file mode 100644 index a4e403739..000000000 --- a/drivers/staging/unisys/virthba/Makefile +++ /dev/null @@ -1,12 +0,0 @@ -# -# Makefile for Unisys virthba -# - -obj-$(CONFIG_UNISYS_VIRTHBA) += virthba.o - -ccflags-y += -Idrivers/staging/unisys/include -ccflags-y += -Idrivers/staging/unisys/uislib -ccflags-y += -Idrivers/staging/unisys/visorchipset -ccflags-y += -Idrivers/staging/unisys/virtpci -ccflags-y += -Idrivers/staging/unisys/common-spar/include -ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels diff --git a/drivers/staging/unisys/virthba/virthba.c b/drivers/staging/unisys/virthba/virthba.c deleted file mode 100644 index d9001cca0..000000000 --- a/drivers/staging/unisys/virthba/virthba.c +++ /dev/null @@ -1,1572 +0,0 @@ -/* virthba.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#define EXPORT_SYMTAB - -/* if you want to turn on some debugging of write device data or read - * device data, define these two undefs. You will probably want to - * customize the code which is here since it was written assuming - * reading and writing a specific data file df.64M.txt which is a - * 64Megabyte file created by Art Nilson using a scritp I wrote called - * cr_test_data.pl. The data file consists of 256 byte lines of text - * which start with an 8 digit sequence number, a colon, and then - * letters after that */ - -#include <linux/kernel.h> -#ifdef CONFIG_MODVERSIONS -#include <config/modversions.h> -#endif - -#include "diagnostics/appos_subsystems.h" -#include "uisutils.h" -#include "uisqueue.h" -#include "uisthread.h" - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/pci.h> -#include <linux/spinlock.h> -#include <linux/device.h> -#include <linux/slab.h> -#include <scsi/scsi.h> -#include <scsi/scsi_host.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_device.h> -#include <asm/param.h> -#include <linux/debugfs.h> -#include <linux/types.h> - -#include "virthba.h" -#include "virtpci.h" -#include "visorchipset.h" -#include "version.h" -#include "guestlinuxdebug.h" -/* this is shorter than using __FILE__ (full path name) in - * debug/info/error messages - */ -#define CURRENT_FILE_PC VIRT_HBA_PC_virthba_c -#define __MYFILE__ "virthba.c" - -/* NOTE: L1_CACHE_BYTES >=128 */ -#define DEVICE_ATTRIBUTE struct device_attribute - - /* MAX_BUF = 6 lines x 10 MAXVHBA x 80 characters - * = 4800 bytes ~ 2^13 = 8192 bytes - */ -#define MAX_BUF 8192 - -/*****************************************************/ -/* Forward declarations */ -/*****************************************************/ -static int virthba_probe(struct virtpci_dev *dev, - const struct pci_device_id *id); -static void virthba_remove(struct virtpci_dev *dev); -static int virthba_abort_handler(struct scsi_cmnd *scsicmd); -static int virthba_bus_reset_handler(struct scsi_cmnd *scsicmd); -static int virthba_device_reset_handler(struct scsi_cmnd *scsicmd); -static int virthba_host_reset_handler(struct scsi_cmnd *scsicmd); -static const char *virthba_get_info(struct Scsi_Host *shp); -static int virthba_ioctl(struct scsi_device *dev, int cmd, void __user *arg); -static int virthba_queue_command_lck(struct scsi_cmnd *scsicmd, - void (*virthba_cmnd_done) - (struct scsi_cmnd *)); - -static const struct x86_cpu_id unisys_spar_ids[] = { - { X86_VENDOR_INTEL, 6, 62, X86_FEATURE_ANY }, - {} -}; - -/* Autoload */ -MODULE_DEVICE_TABLE(x86cpu, unisys_spar_ids); - -#ifdef DEF_SCSI_QCMD -static DEF_SCSI_QCMD(virthba_queue_command) -#else -#define virthba_queue_command virthba_queue_command_lck -#endif - -static int virthba_slave_alloc(struct scsi_device *scsidev); -static int virthba_slave_configure(struct scsi_device *scsidev); -static void virthba_slave_destroy(struct scsi_device *scsidev); -static int process_incoming_rsps(void *); -static int virthba_serverup(struct virtpci_dev *virtpcidev); -static int virthba_serverdown(struct virtpci_dev *virtpcidev, u32 state); -static void do_disk_add_remove(struct work_struct *work); -static void virthba_serverdown_complete(struct work_struct *work); -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset); -static ssize_t enable_ints_write(struct file *file, - const char __user *buffer, size_t count, - loff_t *ppos); - -/*****************************************************/ -/* Globals */ -/*****************************************************/ - -static int rsltq_wait_usecs = 4000; /* Default 4ms */ -static unsigned int max_buff_len; - -/* Module options */ -static char *virthba_options = "NONE"; - -static const struct pci_device_id virthba_id_table[] = { - {PCI_DEVICE(PCI_VENDOR_ID_UNISYS, PCI_DEVICE_ID_VIRTHBA)}, - {0}, -}; - -/* export virthba_id_table */ -MODULE_DEVICE_TABLE(pci, virthba_id_table); - -static struct workqueue_struct *virthba_serverdown_workqueue; - -static struct virtpci_driver virthba_driver = { - .name = "uisvirthba", - .version = VERSION, - .vertag = NULL, - .id_table = virthba_id_table, - .probe = virthba_probe, - .remove = virthba_remove, - .resume = virthba_serverup, - .suspend = virthba_serverdown -}; - -/* The Send and Recive Buffers of the IO Queue may both be full */ -#define MAX_PENDING_REQUESTS (MIN_NUMSIGNALS*2) -#define INTERRUPT_VECTOR_MASK 0x3F - -struct scsipending { - char cmdtype; /* Type of pointer that is being stored */ - void *sent; /* The Data being tracked */ - /* struct scsi_cmnd *type for virthba_queue_command */ - /* struct uiscmdrsp *type for management commands */ -}; - -#define VIRTHBA_ERROR_COUNT 30 -#define IOS_ERROR_THRESHOLD 1000 -struct virtdisk_info { - u32 valid; - u32 channel, id, lun; /* Disk Path */ - atomic_t ios_threshold; - atomic_t error_count; - struct virtdisk_info *next; -}; - -/* Each Scsi_Host has a host_data area that contains this struct. */ -struct virthba_info { - struct Scsi_Host *scsihost; - struct virtpci_dev *virtpcidev; - struct list_head dev_info_list; - struct chaninfo chinfo; - struct irq_info intr; /* use recvInterrupt info to receive - interrupts when IOs complete */ - int interrupt_vector; - struct scsipending pending[MAX_PENDING_REQUESTS]; /* Tracks the requests - that have been */ - /* forwarded to the IOVM and haven't returned yet */ - unsigned int nextinsert; /* Start search for next pending - free slot here */ - spinlock_t privlock; - bool serverdown; - bool serverchangingstate; - unsigned long long acquire_failed_cnt; - unsigned long long interrupts_rcvd; - unsigned long long interrupts_notme; - unsigned long long interrupts_disabled; - struct work_struct serverdown_completion; - u64 __iomem *flags_addr; - atomic_t interrupt_rcvd; - wait_queue_head_t rsp_queue; - struct virtdisk_info head; -}; - -/* Work Data for dar_work_queue */ -struct diskaddremove { - u8 add; /* 0-remove, 1-add */ - struct Scsi_Host *shost; /* Scsi Host for this virthba instance */ - u32 channel, id, lun; /* Disk Path */ - struct diskaddremove *next; -}; - -#define virtpci_dev_to_virthba_virthba_get_info(d) \ - container_of(d, struct virthba_info, virtpcidev) - -static DEVICE_ATTRIBUTE *virthba_shost_attrs[]; -static struct scsi_host_template virthba_driver_template = { - .name = "Unisys Virtual HBA", - .info = virthba_get_info, - .ioctl = virthba_ioctl, - .queuecommand = virthba_queue_command, - .eh_abort_handler = virthba_abort_handler, - .eh_device_reset_handler = virthba_device_reset_handler, - .eh_bus_reset_handler = virthba_bus_reset_handler, - .eh_host_reset_handler = virthba_host_reset_handler, - .shost_attrs = virthba_shost_attrs, - -#define VIRTHBA_MAX_CMNDS 128 - .can_queue = VIRTHBA_MAX_CMNDS, - .sg_tablesize = 64, /* largest number of address/length pairs */ - .this_id = -1, - .slave_alloc = virthba_slave_alloc, - .slave_configure = virthba_slave_configure, - .slave_destroy = virthba_slave_destroy, - .use_clustering = ENABLE_CLUSTERING, -}; - -struct virthba_devices_open { - struct virthba_info *virthbainfo; -}; - -static const struct file_operations debugfs_info_fops = { - .read = info_debugfs_read, -}; - -static const struct file_operations debugfs_enable_ints_fops = { - .write = enable_ints_write, -}; - -/*****************************************************/ -/* Structs */ -/*****************************************************/ - -#define VIRTHBASOPENMAX 1 -/* array of open devices maintained by open() and close(); */ -static struct virthba_devices_open virthbas_open[VIRTHBASOPENMAX]; -static struct dentry *virthba_debugfs_dir; - -/*****************************************************/ -/* Local Functions */ -/*****************************************************/ -static int -add_scsipending_entry(struct virthba_info *vhbainfo, char cmdtype, void *new) -{ - unsigned long flags; - int insert_location; - - spin_lock_irqsave(&vhbainfo->privlock, flags); - insert_location = vhbainfo->nextinsert; - while (vhbainfo->pending[insert_location].sent) { - insert_location = (insert_location + 1) % MAX_PENDING_REQUESTS; - if (insert_location == (int)vhbainfo->nextinsert) { - spin_unlock_irqrestore(&vhbainfo->privlock, flags); - return -1; - } - } - - vhbainfo->pending[insert_location].cmdtype = cmdtype; - vhbainfo->pending[insert_location].sent = new; - vhbainfo->nextinsert = (insert_location + 1) % MAX_PENDING_REQUESTS; - spin_unlock_irqrestore(&vhbainfo->privlock, flags); - - return insert_location; -} - -static unsigned int -add_scsipending_entry_with_wait(struct virthba_info *vhbainfo, char cmdtype, - void *new) -{ - int insert_location = add_scsipending_entry(vhbainfo, cmdtype, new); - - while (insert_location == -1) { - set_current_state(TASK_INTERRUPTIBLE); - schedule_timeout(msecs_to_jiffies(10)); - insert_location = add_scsipending_entry(vhbainfo, cmdtype, new); - } - - return (unsigned int)insert_location; -} - -static void * -del_scsipending_entry(struct virthba_info *vhbainfo, uintptr_t del) -{ - unsigned long flags; - void *sent = NULL; - - if (del < MAX_PENDING_REQUESTS) { - spin_lock_irqsave(&vhbainfo->privlock, flags); - sent = vhbainfo->pending[del].sent; - - vhbainfo->pending[del].cmdtype = 0; - vhbainfo->pending[del].sent = NULL; - spin_unlock_irqrestore(&vhbainfo->privlock, flags); - } - - return sent; -} - -/* dar_work_queue (Disk Add/Remove) */ -static struct work_struct dar_work_queue; -static struct diskaddremove *dar_work_queue_head; -static spinlock_t dar_work_queue_lock; -static unsigned short dar_work_queue_sched; -#define QUEUE_DISKADDREMOVE(dar) { \ - spin_lock_irqsave(&dar_work_queue_lock, flags); \ - if (!dar_work_queue_head) { \ - dar_work_queue_head = dar; \ - dar->next = NULL; \ - } \ - else { \ - dar->next = dar_work_queue_head; \ - dar_work_queue_head = dar; \ - } \ - if (!dar_work_queue_sched) { \ - schedule_work(&dar_work_queue); \ - dar_work_queue_sched = 1; \ - } \ - spin_unlock_irqrestore(&dar_work_queue_lock, flags); \ -} - -static inline void -send_disk_add_remove(struct diskaddremove *dar) -{ - struct scsi_device *sdev; - int error; - - sdev = scsi_device_lookup(dar->shost, dar->channel, dar->id, dar->lun); - if (sdev) { - if (!(dar->add)) - scsi_remove_device(sdev); - } else if (dar->add) { - error = - scsi_add_device(dar->shost, dar->channel, dar->id, - dar->lun); - } - kfree(dar); -} - -/*****************************************************/ -/* dar_work_queue Handler Thread */ -/*****************************************************/ -static void -do_disk_add_remove(struct work_struct *work) -{ - struct diskaddremove *dar; - struct diskaddremove *tmphead; - int i = 0; - unsigned long flags; - - spin_lock_irqsave(&dar_work_queue_lock, flags); - tmphead = dar_work_queue_head; - dar_work_queue_head = NULL; - dar_work_queue_sched = 0; - spin_unlock_irqrestore(&dar_work_queue_lock, flags); - while (tmphead) { - dar = tmphead; - tmphead = dar->next; - send_disk_add_remove(dar); - i++; - } -} - -/*****************************************************/ -/* Routine to add entry to dar_work_queue */ -/*****************************************************/ -static void -process_disk_notify(struct Scsi_Host *shost, struct uiscmdrsp *cmdrsp) -{ - struct diskaddremove *dar; - unsigned long flags; - - dar = kzalloc(sizeof(*dar), GFP_ATOMIC); - if (dar) { - dar->add = cmdrsp->disknotify.add; - dar->shost = shost; - dar->channel = cmdrsp->disknotify.channel; - dar->id = cmdrsp->disknotify.id; - dar->lun = cmdrsp->disknotify.lun; - QUEUE_DISKADDREMOVE(dar); - } -} - -/*****************************************************/ -/* Probe Remove Functions */ -/*****************************************************/ -static irqreturn_t -virthba_isr(int irq, void *dev_id) -{ - struct virthba_info *virthbainfo = (struct virthba_info *)dev_id; - struct channel_header __iomem *channel_header; - struct signal_queue_header __iomem *pqhdr; - u64 mask; - unsigned long long rc1; - - if (!virthbainfo) - return IRQ_NONE; - virthbainfo->interrupts_rcvd++; - channel_header = virthbainfo->chinfo.queueinfo->chan; - if (((readq(&channel_header->features) - & ULTRA_IO_IOVM_IS_OK_WITH_DRIVER_DISABLING_INTS) != 0) && - ((readq(&channel_header->features) & - ULTRA_IO_DRIVER_DISABLES_INTS) != - 0)) { - virthbainfo->interrupts_disabled++; - mask = ~ULTRA_CHANNEL_ENABLE_INTS; - rc1 = uisqueue_interlocked_and(virthbainfo->flags_addr, mask); - } - if (spar_signalqueue_empty(channel_header, IOCHAN_FROM_IOPART)) { - virthbainfo->interrupts_notme++; - return IRQ_NONE; - } - pqhdr = (struct signal_queue_header __iomem *) - ((char __iomem *)channel_header + - readq(&channel_header->ch_space_offset)) + IOCHAN_FROM_IOPART; - writeq(readq(&pqhdr->num_irq_received) + 1, - &pqhdr->num_irq_received); - atomic_set(&virthbainfo->interrupt_rcvd, 1); - wake_up_interruptible(&virthbainfo->rsp_queue); - return IRQ_HANDLED; -} - -static int -virthba_probe(struct virtpci_dev *virtpcidev, const struct pci_device_id *id) -{ - int error; - struct Scsi_Host *scsihost; - struct virthba_info *virthbainfo; - int rsp; - int i; - irq_handler_t handler = virthba_isr; - struct channel_header __iomem *channel_header; - struct signal_queue_header __iomem *pqhdr; - u64 mask; - - POSTCODE_LINUX_2(VHBA_PROBE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - /* call scsi_host_alloc to register a scsi host adapter - * instance - this virthba that has just been created is an - * instance of a scsi host adapter. This scsi_host_alloc - * function allocates a new Scsi_Host struct & performs basic - * initialization. The host is not published to the scsi - * midlayer until scsi_add_host is called. - */ - - /* arg 2 passed in length of extra space we want allocated - * with scsi_host struct for our own use scsi_host_alloc - * assign host_no - */ - scsihost = scsi_host_alloc(&virthba_driver_template, - sizeof(struct virthba_info)); - if (!scsihost) - return -ENODEV; - - scsihost->this_id = UIS_MAGIC_VHBA; - /* linux treats max-channel differently than max-id & max-lun. - * In the latter cases, those two values result in 0 to max-1 - * (inclusive) being scanned. But in the case of channels, the - * scan is 0 to max (inclusive); so we will subtract one from - * the max-channel value. - */ - scsihost->max_channel = (unsigned)virtpcidev->scsi.max.max_channel; - scsihost->max_id = (unsigned)virtpcidev->scsi.max.max_id; - scsihost->max_lun = (unsigned)virtpcidev->scsi.max.max_lun; - scsihost->cmd_per_lun = (unsigned)virtpcidev->scsi.max.cmd_per_lun; - scsihost->max_sectors = - (unsigned short)(virtpcidev->scsi.max.max_io_size >> 9); - scsihost->sg_tablesize = - (unsigned short)(virtpcidev->scsi.max.max_io_size / PAGE_SIZE); - if (scsihost->sg_tablesize > MAX_PHYS_INFO) - scsihost->sg_tablesize = MAX_PHYS_INFO; - - /* this creates "host%d" in sysfs. If 2nd argument is NULL, - * then this generic /sys/devices/platform/host? device is - * created and /sys/scsi_host/host? -> - * /sys/devices/platform/host? If 2nd argument is not NULL, - * then this generic /sys/devices/<path>/host? is created and - * host? points to that device instead. - */ - error = scsi_add_host(scsihost, &virtpcidev->generic_dev); - if (error) { - POSTCODE_LINUX_2(VHBA_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - /* decr refcount on scsihost which was incremented by - * scsi_add_host so the scsi_host gets deleted - */ - scsi_host_put(scsihost); - return -ENODEV; - } - - virthbainfo = (struct virthba_info *)scsihost->hostdata; - memset(virthbainfo, 0, sizeof(struct virthba_info)); - for (i = 0; i < VIRTHBASOPENMAX; i++) { - if (!virthbas_open[i].virthbainfo) { - virthbas_open[i].virthbainfo = virthbainfo; - break; - } - } - virthbainfo->interrupt_vector = -1; - virthbainfo->chinfo.queueinfo = &virtpcidev->queueinfo; - virthbainfo->virtpcidev = virtpcidev; - spin_lock_init(&virthbainfo->chinfo.insertlock); - - init_waitqueue_head(&virthbainfo->rsp_queue); - spin_lock_init(&virthbainfo->privlock); - memset(&virthbainfo->pending, 0, sizeof(virthbainfo->pending)); - virthbainfo->serverdown = false; - virthbainfo->serverchangingstate = false; - - virthbainfo->intr = virtpcidev->intr; - /* save of host within virthba_info */ - virthbainfo->scsihost = scsihost; - - /* save of host within virtpci_dev */ - virtpcidev->scsi.scsihost = scsihost; - - /* Setup workqueue for serverdown messages */ - INIT_WORK(&virthbainfo->serverdown_completion, - virthba_serverdown_complete); - - writeq(readq(&virthbainfo->chinfo.queueinfo->chan->features) | - ULTRA_IO_CHANNEL_IS_POLLING, - &virthbainfo->chinfo.queueinfo->chan->features); - /* start thread that will receive scsicmnd responses */ - - channel_header = virthbainfo->chinfo.queueinfo->chan; - pqhdr = (struct signal_queue_header __iomem *) - ((char __iomem *)channel_header + - readq(&channel_header->ch_space_offset)) + IOCHAN_FROM_IOPART; - virthbainfo->flags_addr = &pqhdr->features; - - if (!uisthread_start(&virthbainfo->chinfo.threadinfo, - process_incoming_rsps, - virthbainfo, "vhba_incoming")) { - /* decr refcount on scsihost which was incremented by - * scsi_add_host so the scsi_host gets deleted - */ - POSTCODE_LINUX_2(VHBA_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - scsi_host_put(scsihost); - return -ENODEV; - } - virthbainfo->interrupt_vector = - virthbainfo->intr.recv_irq_handle & INTERRUPT_VECTOR_MASK; - rsp = request_irq(virthbainfo->interrupt_vector, handler, IRQF_SHARED, - scsihost->hostt->name, virthbainfo); - if (rsp != 0) { - virthbainfo->interrupt_vector = -1; - POSTCODE_LINUX_2(VHBA_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - } else { - u64 __iomem *features_addr = - &virthbainfo->chinfo.queueinfo->chan->features; - mask = ~(ULTRA_IO_CHANNEL_IS_POLLING | - ULTRA_IO_DRIVER_DISABLES_INTS); - uisqueue_interlocked_and(features_addr, mask); - mask = ULTRA_IO_DRIVER_ENABLES_INTS; - uisqueue_interlocked_or(features_addr, mask); - rsltq_wait_usecs = 4000000; - } - - scsi_scan_host(scsihost); - - POSTCODE_LINUX_2(VHBA_PROBE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return 0; -} - -static void -virthba_remove(struct virtpci_dev *virtpcidev) -{ - struct virthba_info *virthbainfo; - struct Scsi_Host *scsihost = - (struct Scsi_Host *)virtpcidev->scsi.scsihost; - - virthbainfo = (struct virthba_info *)scsihost->hostdata; - if (virthbainfo->interrupt_vector != -1) - free_irq(virthbainfo->interrupt_vector, virthbainfo); - - scsi_remove_host(scsihost); - - uisthread_stop(&virthbainfo->chinfo.threadinfo); - - /* decr refcount on scsihost which was incremented by - * scsi_add_host so the scsi_host gets deleted - */ - scsi_host_put(scsihost); -} - -static int -forward_vdiskmgmt_command(enum vdisk_mgmt_types vdiskcmdtype, - struct Scsi_Host *scsihost, - struct uisscsi_dest *vdest) -{ - struct uiscmdrsp *cmdrsp; - struct virthba_info *virthbainfo = - (struct virthba_info *)scsihost->hostdata; - int notifyresult = 0xffff; - wait_queue_head_t notifyevent; - - if (virthbainfo->serverdown || virthbainfo->serverchangingstate) - return FAILED; - - cmdrsp = kzalloc(SIZEOF_CMDRSP, GFP_ATOMIC); - if (!cmdrsp) - return FAILED; /* reject */ - - init_waitqueue_head(¬ifyevent); - - /* issue VDISK_MGMT_CMD - * set type to command - as opposed to task mgmt - */ - cmdrsp->cmdtype = CMD_VDISKMGMT_TYPE; - /* specify the event that has to be triggered when this cmd is - * complete - */ - cmdrsp->vdiskmgmt.notify = (void *)¬ifyevent; - cmdrsp->vdiskmgmt.notifyresult = (void *)¬ifyresult; - - /* save destination */ - cmdrsp->vdiskmgmt.vdisktype = vdiskcmdtype; - cmdrsp->vdiskmgmt.vdest.channel = vdest->channel; - cmdrsp->vdiskmgmt.vdest.id = vdest->id; - cmdrsp->vdiskmgmt.vdest.lun = vdest->lun; - cmdrsp->vdiskmgmt.scsicmd = - (void *)(uintptr_t) - add_scsipending_entry_with_wait(virthbainfo, CMD_VDISKMGMT_TYPE, - (void *)cmdrsp); - - uisqueue_put_cmdrsp_with_lock_client(virthbainfo->chinfo.queueinfo, - cmdrsp, IOCHAN_TO_IOPART, - &virthbainfo->chinfo.insertlock, - DONT_ISSUE_INTERRUPT, (u64)NULL, - OK_TO_WAIT, "vhba"); - wait_event(notifyevent, notifyresult != 0xffff); - kfree(cmdrsp); - return SUCCESS; -} - -/*****************************************************/ -/* Scsi Host support functions */ -/*****************************************************/ - -static int -forward_taskmgmt_command(enum task_mgmt_types tasktype, - struct scsi_device *scsidev) -{ - struct uiscmdrsp *cmdrsp; - struct virthba_info *virthbainfo = - (struct virthba_info *)scsidev->host->hostdata; - int notifyresult = 0xffff; - wait_queue_head_t notifyevent; - - if (virthbainfo->serverdown || virthbainfo->serverchangingstate) - return FAILED; - - cmdrsp = kzalloc(SIZEOF_CMDRSP, GFP_ATOMIC); - if (!cmdrsp) - return FAILED; /* reject */ - - init_waitqueue_head(¬ifyevent); - - /* issue TASK_MGMT_ABORT_TASK */ - /* set type to command - as opposed to task mgmt */ - cmdrsp->cmdtype = CMD_SCSITASKMGMT_TYPE; - /* specify the event that has to be triggered when this */ - /* cmd is complete */ - cmdrsp->scsitaskmgmt.notify = (void *)¬ifyevent; - cmdrsp->scsitaskmgmt.notifyresult = (void *)¬ifyresult; - - /* save destination */ - cmdrsp->scsitaskmgmt.tasktype = tasktype; - cmdrsp->scsitaskmgmt.vdest.channel = scsidev->channel; - cmdrsp->scsitaskmgmt.vdest.id = scsidev->id; - cmdrsp->scsitaskmgmt.vdest.lun = scsidev->lun; - cmdrsp->scsitaskmgmt.scsicmd = - (void *)(uintptr_t) - add_scsipending_entry_with_wait(virthbainfo, - CMD_SCSITASKMGMT_TYPE, - (void *)cmdrsp); - - uisqueue_put_cmdrsp_with_lock_client(virthbainfo->chinfo.queueinfo, - cmdrsp, IOCHAN_TO_IOPART, - &virthbainfo->chinfo.insertlock, - DONT_ISSUE_INTERRUPT, (u64)NULL, - OK_TO_WAIT, "vhba"); - wait_event(notifyevent, notifyresult != 0xffff); - kfree(cmdrsp); - return SUCCESS; -} - -/* The abort handler returns SUCCESS if it has succeeded to make LLDD - * and all related hardware forget about the scmd. - */ -static int -virthba_abort_handler(struct scsi_cmnd *scsicmd) -{ - /* issue TASK_MGMT_ABORT_TASK */ - struct scsi_device *scsidev; - struct virtdisk_info *vdisk; - - scsidev = scsicmd->device; - for (vdisk = &((struct virthba_info *)scsidev->host->hostdata)->head; - vdisk->next; vdisk = vdisk->next) { - if ((scsidev->channel == vdisk->channel) && - (scsidev->id == vdisk->id) && - (scsidev->lun == vdisk->lun)) { - if (atomic_read(&vdisk->error_count) < - VIRTHBA_ERROR_COUNT) { - atomic_inc(&vdisk->error_count); - POSTCODE_LINUX_2(VHBA_COMMAND_HANDLER_PC, - POSTCODE_SEVERITY_INFO); - } else - atomic_set(&vdisk->ios_threshold, - IOS_ERROR_THRESHOLD); - } - } - return forward_taskmgmt_command(TASK_MGMT_ABORT_TASK, scsicmd->device); -} - -static int -virthba_bus_reset_handler(struct scsi_cmnd *scsicmd) -{ - /* issue TASK_MGMT_TARGET_RESET for each target on the bus */ - struct scsi_device *scsidev; - struct virtdisk_info *vdisk; - - scsidev = scsicmd->device; - for (vdisk = &((struct virthba_info *)scsidev->host->hostdata)->head; - vdisk->next; vdisk = vdisk->next) { - if ((scsidev->channel == vdisk->channel) && - (scsidev->id == vdisk->id) && - (scsidev->lun == vdisk->lun)) { - if (atomic_read(&vdisk->error_count) < - VIRTHBA_ERROR_COUNT) { - atomic_inc(&vdisk->error_count); - POSTCODE_LINUX_2(VHBA_COMMAND_HANDLER_PC, - POSTCODE_SEVERITY_INFO); - } else - atomic_set(&vdisk->ios_threshold, - IOS_ERROR_THRESHOLD); - } - } - return forward_taskmgmt_command(TASK_MGMT_BUS_RESET, scsicmd->device); -} - -static int -virthba_device_reset_handler(struct scsi_cmnd *scsicmd) -{ - /* issue TASK_MGMT_LUN_RESET */ - struct scsi_device *scsidev; - struct virtdisk_info *vdisk; - - scsidev = scsicmd->device; - for (vdisk = &((struct virthba_info *)scsidev->host->hostdata)->head; - vdisk->next; vdisk = vdisk->next) { - if ((scsidev->channel == vdisk->channel) && - (scsidev->id == vdisk->id) && - (scsidev->lun == vdisk->lun)) { - if (atomic_read(&vdisk->error_count) < - VIRTHBA_ERROR_COUNT) { - atomic_inc(&vdisk->error_count); - POSTCODE_LINUX_2(VHBA_COMMAND_HANDLER_PC, - POSTCODE_SEVERITY_INFO); - } else - atomic_set(&vdisk->ios_threshold, - IOS_ERROR_THRESHOLD); - } - } - return forward_taskmgmt_command(TASK_MGMT_LUN_RESET, scsicmd->device); -} - -static int -virthba_host_reset_handler(struct scsi_cmnd *scsicmd) -{ - /* issue TASK_MGMT_TARGET_RESET for each target on each bus for host */ - return SUCCESS; -} - -static char virthba_get_info_str[256]; - -static const char * -virthba_get_info(struct Scsi_Host *shp) -{ - /* Return version string */ - sprintf(virthba_get_info_str, "virthba, version %s\n", VIRTHBA_VERSION); - return virthba_get_info_str; -} - -static int -virthba_ioctl(struct scsi_device *dev, int cmd, void __user *arg) -{ - return -EINVAL; -} - -/* This returns SCSI_MLQUEUE_DEVICE_BUSY if the signal queue to IOpart - * is full. - */ -static int -virthba_queue_command_lck(struct scsi_cmnd *scsicmd, - void (*virthba_cmnd_done)(struct scsi_cmnd *)) -{ - struct scsi_device *scsidev = scsicmd->device; - int insert_location; - unsigned char op; - unsigned char *cdb = scsicmd->cmnd; - struct Scsi_Host *scsihost = scsidev->host; - struct uiscmdrsp *cmdrsp; - unsigned int i; - struct virthba_info *virthbainfo = - (struct virthba_info *)scsihost->hostdata; - struct scatterlist *sg = NULL; - struct scatterlist *sgl = NULL; - int sg_failed = 0; - - if (virthbainfo->serverdown || virthbainfo->serverchangingstate) - return SCSI_MLQUEUE_DEVICE_BUSY; - cmdrsp = kzalloc(SIZEOF_CMDRSP, GFP_ATOMIC); - if (!cmdrsp) - return 1; /* reject the command */ - - /* now saving everything we need from scsi_cmd into cmdrsp - * before we queue cmdrsp set type to command - as opposed to - * task mgmt - */ - cmdrsp->cmdtype = CMD_SCSI_TYPE; - /* save the pending insertion location. Deletion from pending - * will return the scsicmd pointer for completion - */ - insert_location = - add_scsipending_entry(virthbainfo, CMD_SCSI_TYPE, (void *)scsicmd); - if (insert_location != -1) { - cmdrsp->scsi.scsicmd = (void *)(uintptr_t)insert_location; - } else { - kfree(cmdrsp); - return SCSI_MLQUEUE_DEVICE_BUSY; - } - /* save done function that we have call when cmd is complete */ - scsicmd->scsi_done = virthba_cmnd_done; - /* save destination */ - cmdrsp->scsi.vdest.channel = scsidev->channel; - cmdrsp->scsi.vdest.id = scsidev->id; - cmdrsp->scsi.vdest.lun = scsidev->lun; - /* save datadir */ - cmdrsp->scsi.data_dir = scsicmd->sc_data_direction; - memcpy(cmdrsp->scsi.cmnd, cdb, MAX_CMND_SIZE); - - cmdrsp->scsi.bufflen = scsi_bufflen(scsicmd); - - /* keep track of the max buffer length so far. */ - if (cmdrsp->scsi.bufflen > max_buff_len) - max_buff_len = cmdrsp->scsi.bufflen; - - if (scsi_sg_count(scsicmd) > MAX_PHYS_INFO) { - del_scsipending_entry(virthbainfo, (uintptr_t)insert_location); - kfree(cmdrsp); - return 1; /* reject the command */ - } - - /* This is what we USED to do when we assumed we were running */ - /* uissd & virthba on the same Linux system. */ - /* cmdrsp->scsi.buffer = scsicmd->request_buffer; */ - /* The following code does NOT make that assumption. */ - /* convert buffer to phys information */ - if (scsi_sg_count(scsicmd) == 0) { - if (scsi_bufflen(scsicmd) > 0) { - BUG_ON(scsi_sg_count(scsicmd) == 0); - } - } else { - /* buffer is scatterlist - copy it out */ - sgl = scsi_sglist(scsicmd); - - for_each_sg(sgl, sg, scsi_sg_count(scsicmd), i) { - cmdrsp->scsi.gpi_list[i].address = sg_phys(sg); - cmdrsp->scsi.gpi_list[i].length = sg->length; - } - - if (sg_failed) { - /* BUG(); ***** For now, let it fail in uissd - * if it is a problem, as it might just - * work - */ - } - - cmdrsp->scsi.guest_phys_entries = scsi_sg_count(scsicmd); - } - - op = cdb[0]; - i = uisqueue_put_cmdrsp_with_lock_client(virthbainfo->chinfo.queueinfo, - cmdrsp, IOCHAN_TO_IOPART, - &virthbainfo->chinfo. - insertlock, - DONT_ISSUE_INTERRUPT, - (u64)NULL, DONT_WAIT, "vhba"); - if (i == 0) { - /* queue must be full - and we said don't wait - return busy */ - kfree(cmdrsp); - del_scsipending_entry(virthbainfo, (uintptr_t)insert_location); - return SCSI_MLQUEUE_DEVICE_BUSY; - } - - /* we're done with cmdrsp space - data from it has been copied - * into channel - free it now. - */ - kfree(cmdrsp); - return 0; /* non-zero implies host/device is busy */ -} - -static int -virthba_slave_alloc(struct scsi_device *scsidev) -{ - /* this called by the midlayer before scan for new devices - - * LLD can alloc any struct & do init if needed. - */ - struct virtdisk_info *vdisk; - struct virtdisk_info *tmpvdisk; - struct virthba_info *virthbainfo; - struct Scsi_Host *scsihost = (struct Scsi_Host *)scsidev->host; - - virthbainfo = (struct virthba_info *)scsihost->hostdata; - if (!virthbainfo) - return 0; /* even though we errored, treat as success */ - - for (vdisk = &virthbainfo->head; vdisk->next; vdisk = vdisk->next) { - if (vdisk->next->valid && - (vdisk->next->channel == scsidev->channel) && - (vdisk->next->id == scsidev->id) && - (vdisk->next->lun == scsidev->lun)) - return 0; - } - tmpvdisk = kzalloc(sizeof(*tmpvdisk), GFP_ATOMIC); - if (!tmpvdisk) - return 0; - - tmpvdisk->channel = scsidev->channel; - tmpvdisk->id = scsidev->id; - tmpvdisk->lun = scsidev->lun; - tmpvdisk->valid = 1; - vdisk->next = tmpvdisk; - return 0; /* success */ -} - -static int -virthba_slave_configure(struct scsi_device *scsidev) -{ - return 0; /* success */ -} - -static void -virthba_slave_destroy(struct scsi_device *scsidev) -{ - /* midlevel calls this after device has been quiesced and - * before it is to be deleted. - */ - struct virtdisk_info *vdisk, *delvdisk; - struct virthba_info *virthbainfo; - struct Scsi_Host *scsihost = (struct Scsi_Host *)scsidev->host; - - virthbainfo = (struct virthba_info *)scsihost->hostdata; - for (vdisk = &virthbainfo->head; vdisk->next; vdisk = vdisk->next) { - if (vdisk->next->valid && - (vdisk->next->channel == scsidev->channel) && - (vdisk->next->id == scsidev->id) && - (vdisk->next->lun == scsidev->lun)) { - delvdisk = vdisk->next; - vdisk->next = vdisk->next->next; - kfree(delvdisk); - return; - } - } -} - -/*****************************************************/ -/* Scsi Cmnd support thread */ -/*****************************************************/ - -static void -do_scsi_linuxstat(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd) -{ - struct virtdisk_info *vdisk; - struct scsi_device *scsidev; - struct sense_data *sd; - - scsidev = scsicmd->device; - memcpy(scsicmd->sense_buffer, cmdrsp->scsi.sensebuf, MAX_SENSE_SIZE); - sd = (struct sense_data *)scsicmd->sense_buffer; - - /* Do not log errors for disk-not-present inquiries */ - if ((cmdrsp->scsi.cmnd[0] == INQUIRY) && - (host_byte(cmdrsp->scsi.linuxstat) == DID_NO_CONNECT) && - (cmdrsp->scsi.addlstat == ADDL_SEL_TIMEOUT)) - return; - - /* Okay see what our error_count is here.... */ - for (vdisk = &((struct virthba_info *)scsidev->host->hostdata)->head; - vdisk->next; vdisk = vdisk->next) { - if ((scsidev->channel != vdisk->channel) || - (scsidev->id != vdisk->id) || - (scsidev->lun != vdisk->lun)) - continue; - - if (atomic_read(&vdisk->error_count) < VIRTHBA_ERROR_COUNT) { - atomic_inc(&vdisk->error_count); - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); - } - } -} - -static void -do_scsi_nolinuxstat(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd) -{ - struct scsi_device *scsidev; - unsigned char buf[36]; - struct scatterlist *sg; - unsigned int i; - char *thispage; - char *thispage_orig; - int bufind = 0; - struct virtdisk_info *vdisk; - - scsidev = scsicmd->device; - if ((cmdrsp->scsi.cmnd[0] == INQUIRY) && - (cmdrsp->scsi.bufflen >= MIN_INQUIRY_RESULT_LEN)) { - if (cmdrsp->scsi.no_disk_result == 0) - return; - - /* Linux scsi code is weird; it wants - * a device at Lun 0 to issue report - * luns, but we don't want a disk - * there so we'll present a processor - * there. */ - SET_NO_DISK_INQUIRY_RESULT(buf, cmdrsp->scsi.bufflen, - scsidev->lun, - DEV_DISK_CAPABLE_NOT_PRESENT, - DEV_NOT_CAPABLE); - - if (scsi_sg_count(scsicmd) == 0) { - if (scsi_bufflen(scsicmd) > 0) { - BUG_ON(scsi_sg_count(scsicmd) == - 0); - } - memcpy(scsi_sglist(scsicmd), buf, - cmdrsp->scsi.bufflen); - return; - } - - sg = scsi_sglist(scsicmd); - for (i = 0; i < scsi_sg_count(scsicmd); i++) { - thispage_orig = kmap_atomic(sg_page(sg + i)); - thispage = (void *)((unsigned long)thispage_orig | - sg[i].offset); - memcpy(thispage, buf + bufind, sg[i].length); - kunmap_atomic(thispage_orig); - bufind += sg[i].length; - } - } else { - vdisk = &((struct virthba_info *)scsidev->host->hostdata)->head; - for ( ; vdisk->next; vdisk = vdisk->next) { - if ((scsidev->channel != vdisk->channel) || - (scsidev->id != vdisk->id) || - (scsidev->lun != vdisk->lun)) - continue; - - if (atomic_read(&vdisk->ios_threshold) > 0) { - atomic_dec(&vdisk->ios_threshold); - if (atomic_read(&vdisk->ios_threshold) == 0) { - atomic_set(&vdisk->error_count, 0); - } - } - } - } -} - -static void -complete_scsi_command(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd) -{ - /* take what we need out of cmdrsp and complete the scsicmd */ - scsicmd->result = cmdrsp->scsi.linuxstat; - if (cmdrsp->scsi.linuxstat) - do_scsi_linuxstat(cmdrsp, scsicmd); - else - do_scsi_nolinuxstat(cmdrsp, scsicmd); - - if (scsicmd->scsi_done) - scsicmd->scsi_done(scsicmd); -} - -static inline void -complete_vdiskmgmt_command(struct uiscmdrsp *cmdrsp) -{ - /* copy the result of the taskmgmt and */ - /* wake up the error handler that is waiting for this */ - *(int *)cmdrsp->vdiskmgmt.notifyresult = cmdrsp->vdiskmgmt.result; - wake_up_all((wait_queue_head_t *)cmdrsp->vdiskmgmt.notify); -} - -static inline void -complete_taskmgmt_command(struct uiscmdrsp *cmdrsp) -{ - /* copy the result of the taskmgmt and */ - /* wake up the error handler that is waiting for this */ - *(int *)cmdrsp->scsitaskmgmt.notifyresult = - cmdrsp->scsitaskmgmt.result; - wake_up_all((wait_queue_head_t *)cmdrsp->scsitaskmgmt.notify); -} - -static void -drain_queue(struct virthba_info *virthbainfo, struct chaninfo *dc, - struct uiscmdrsp *cmdrsp) -{ - unsigned long flags; - int qrslt = 0; - struct scsi_cmnd *scsicmd; - struct Scsi_Host *shost = virthbainfo->scsihost; - - while (1) { - spin_lock_irqsave(&virthbainfo->chinfo.insertlock, flags); - if (!spar_channel_client_acquire_os(dc->queueinfo->chan, - "vhba")) { - spin_unlock_irqrestore(&virthbainfo->chinfo.insertlock, - flags); - virthbainfo->acquire_failed_cnt++; - break; - } - qrslt = uisqueue_get_cmdrsp(dc->queueinfo, cmdrsp, - IOCHAN_FROM_IOPART); - spar_channel_client_release_os(dc->queueinfo->chan, "vhba"); - spin_unlock_irqrestore(&virthbainfo->chinfo.insertlock, flags); - if (qrslt == 0) - break; - if (cmdrsp->cmdtype == CMD_SCSI_TYPE) { - /* scsicmd location is returned by the - * deletion - */ - scsicmd = del_scsipending_entry(virthbainfo, - (uintptr_t) - cmdrsp->scsi.scsicmd); - if (!scsicmd) - break; - /* complete the orig cmd */ - complete_scsi_command(cmdrsp, scsicmd); - } else if (cmdrsp->cmdtype == CMD_SCSITASKMGMT_TYPE) { - if (!del_scsipending_entry(virthbainfo, - (uintptr_t)cmdrsp->scsitaskmgmt.scsicmd)) - break; - complete_taskmgmt_command(cmdrsp); - } else if (cmdrsp->cmdtype == CMD_NOTIFYGUEST_TYPE) { - /* The vHba pointer has no meaning in - * a Client/Guest Partition. Let's be - * safe and set it to NULL now. Do - * not use it here! */ - cmdrsp->disknotify.v_hba = NULL; - process_disk_notify(shost, cmdrsp); - } else if (cmdrsp->cmdtype == CMD_VDISKMGMT_TYPE) { - if (!del_scsipending_entry(virthbainfo, - (uintptr_t) - cmdrsp->vdiskmgmt.scsicmd)) - break; - complete_vdiskmgmt_command(cmdrsp); - } - /* cmdrsp is now available for reuse */ - } -} - -/* main function for the thread that waits for scsi commands to arrive - * in a specified queue - */ -static int -process_incoming_rsps(void *v) -{ - struct virthba_info *virthbainfo = v; - struct chaninfo *dc = &virthbainfo->chinfo; - struct uiscmdrsp *cmdrsp = NULL; - const int SZ = sizeof(struct uiscmdrsp); - u64 mask; - unsigned long long rc1; - - UIS_DAEMONIZE("vhba_incoming"); - /* alloc once and reuse */ - cmdrsp = kmalloc(SZ, GFP_ATOMIC); - if (!cmdrsp) { - complete_and_exit(&dc->threadinfo.has_stopped, 0); - return 0; - } - mask = ULTRA_CHANNEL_ENABLE_INTS; - while (1) { - if (kthread_should_stop()) - break; - wait_event_interruptible_timeout(virthbainfo->rsp_queue, - (atomic_read(&virthbainfo->interrupt_rcvd) == 1), - usecs_to_jiffies(rsltq_wait_usecs)); - atomic_set(&virthbainfo->interrupt_rcvd, 0); - /* drain queue */ - drain_queue(virthbainfo, dc, cmdrsp); - rc1 = uisqueue_interlocked_or(virthbainfo->flags_addr, mask); - } - - kfree(cmdrsp); - - complete_and_exit(&dc->threadinfo.has_stopped, 0); -} - -/*****************************************************/ -/* Debugfs filesystem functions */ -/*****************************************************/ - -static ssize_t info_debugfs_read(struct file *file, - char __user *buf, size_t len, loff_t *offset) -{ - ssize_t bytes_read = 0; - int str_pos = 0; - u64 phys_flags_addr; - int i; - struct virthba_info *virthbainfo; - char *vbuf; - - if (len > MAX_BUF) - len = MAX_BUF; - vbuf = kzalloc(len, GFP_KERNEL); - if (!vbuf) - return -ENOMEM; - - for (i = 0; i < VIRTHBASOPENMAX; i++) { - if (!virthbas_open[i].virthbainfo) - continue; - - virthbainfo = virthbas_open[i].virthbainfo; - - str_pos += scnprintf(vbuf + str_pos, - len - str_pos, "max_buff_len:%u\n", - max_buff_len); - - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "\nvirthba result queue poll wait:%d usecs.\n", - rsltq_wait_usecs); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "\ninterrupts_rcvd = %llu, interrupts_disabled = %llu\n", - virthbainfo->interrupts_rcvd, - virthbainfo->interrupts_disabled); - str_pos += scnprintf(vbuf + str_pos, - len - str_pos, "\ninterrupts_notme = %llu,\n", - virthbainfo->interrupts_notme); - phys_flags_addr = virt_to_phys((__force void *) - virthbainfo->flags_addr); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "flags_addr = %p, phys_flags_addr=0x%016llx, FeatureFlags=%llu\n", - virthbainfo->flags_addr, phys_flags_addr, - (__le64)readq(virthbainfo->flags_addr)); - str_pos += scnprintf(vbuf + str_pos, - len - str_pos, "acquire_failed_cnt:%llu\n", - virthbainfo->acquire_failed_cnt); - str_pos += scnprintf(vbuf + str_pos, len - str_pos, "\n"); - } - - bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos); - kfree(vbuf); - return bytes_read; -} - -static ssize_t enable_ints_write(struct file *file, const char __user *buffer, - size_t count, loff_t *ppos) -{ - char buf[4]; - int i, new_value; - struct virthba_info *virthbainfo; - - u64 __iomem *features_addr; - u64 mask; - - if (count >= ARRAY_SIZE(buf)) - return -EINVAL; - - buf[count] = '\0'; - if (copy_from_user(buf, buffer, count)) - return -EFAULT; - - i = kstrtoint(buf, 10, &new_value); - - if (i != 0) - return -EFAULT; - - /* set all counts to new_value usually 0 */ - for (i = 0; i < VIRTHBASOPENMAX; i++) { - if (virthbas_open[i].virthbainfo) { - virthbainfo = virthbas_open[i].virthbainfo; - features_addr = - &virthbainfo->chinfo.queueinfo->chan->features; - if (new_value == 1) { - mask = ~(ULTRA_IO_CHANNEL_IS_POLLING | - ULTRA_IO_DRIVER_DISABLES_INTS); - uisqueue_interlocked_and(features_addr, mask); - mask = ULTRA_IO_DRIVER_ENABLES_INTS; - uisqueue_interlocked_or(features_addr, mask); - rsltq_wait_usecs = 4000000; - } else { - mask = ~(ULTRA_IO_DRIVER_ENABLES_INTS | - ULTRA_IO_DRIVER_DISABLES_INTS); - uisqueue_interlocked_and(features_addr, mask); - mask = ULTRA_IO_CHANNEL_IS_POLLING; - uisqueue_interlocked_or(features_addr, mask); - rsltq_wait_usecs = 4000; - } - } - } - return count; -} - -/* As per VirtpciFunc returns 1 for success and 0 for failure */ -static int -virthba_serverup(struct virtpci_dev *virtpcidev) -{ - struct virthba_info *virthbainfo = - (struct virthba_info *)((struct Scsi_Host *)virtpcidev->scsi. - scsihost)->hostdata; - - if (!virthbainfo->serverdown) - return 1; - - if (virthbainfo->serverchangingstate) - return 0; - - virthbainfo->serverchangingstate = true; - /* Must transition channel to ATTACHED state BEFORE we - * can start using the device again - */ - SPAR_CHANNEL_CLIENT_TRANSITION(virthbainfo->chinfo.queueinfo->chan, - dev_name(&virtpcidev->generic_dev), - CHANNELCLI_ATTACHED, NULL); - - /* Start Processing the IOVM Response Queue Again */ - if (!uisthread_start(&virthbainfo->chinfo.threadinfo, - process_incoming_rsps, - virthbainfo, "vhba_incoming")) { - return 0; - } - virthbainfo->serverdown = false; - virthbainfo->serverchangingstate = false; - - return 1; -} - -static void -virthba_serverdown_complete(struct work_struct *work) -{ - struct virthba_info *virthbainfo; - struct virtpci_dev *virtpcidev; - int i; - struct scsipending *pendingdel = NULL; - struct scsi_cmnd *scsicmd = NULL; - struct uiscmdrsp *cmdrsp; - unsigned long flags; - - virthbainfo = container_of(work, struct virthba_info, - serverdown_completion); - - /* Stop Using the IOVM Response Queue (queue should be drained - * by the end) - */ - uisthread_stop(&virthbainfo->chinfo.threadinfo); - - /* Fail Commands that weren't completed */ - spin_lock_irqsave(&virthbainfo->privlock, flags); - for (i = 0; i < MAX_PENDING_REQUESTS; i++) { - pendingdel = &virthbainfo->pending[i]; - switch (pendingdel->cmdtype) { - case CMD_SCSI_TYPE: - scsicmd = (struct scsi_cmnd *)pendingdel->sent; - scsicmd->result = DID_RESET << 16; - if (scsicmd->scsi_done) - scsicmd->scsi_done(scsicmd); - break; - case CMD_SCSITASKMGMT_TYPE: - cmdrsp = (struct uiscmdrsp *)pendingdel->sent; - wake_up_all((wait_queue_head_t *) - cmdrsp->scsitaskmgmt.notify); - *(int *)cmdrsp->scsitaskmgmt.notifyresult = - TASK_MGMT_FAILED; - break; - case CMD_VDISKMGMT_TYPE: - cmdrsp = (struct uiscmdrsp *)pendingdel->sent; - *(int *)cmdrsp->vdiskmgmt.notifyresult = - VDISK_MGMT_FAILED; - wake_up_all((wait_queue_head_t *) - cmdrsp->vdiskmgmt.notify); - break; - default: - break; - } - pendingdel->cmdtype = 0; - pendingdel->sent = NULL; - } - spin_unlock_irqrestore(&virthbainfo->privlock, flags); - - virtpcidev = virthbainfo->virtpcidev; - - virthbainfo->serverdown = true; - virthbainfo->serverchangingstate = false; - /* Return the ServerDown response to Command */ - visorchipset_device_pause_response(virtpcidev->bus_no, - virtpcidev->device_no, 0); -} - -/* As per VirtpciFunc returns 1 for success and 0 for failure */ -static int -virthba_serverdown(struct virtpci_dev *virtpcidev, u32 state) -{ - int stat = 1; - - struct virthba_info *virthbainfo = - (struct virthba_info *)((struct Scsi_Host *)virtpcidev->scsi. - scsihost)->hostdata; - - if (!virthbainfo->serverdown && !virthbainfo->serverchangingstate) { - virthbainfo->serverchangingstate = true; - queue_work(virthba_serverdown_workqueue, - &virthbainfo->serverdown_completion); - } else if (virthbainfo->serverchangingstate) { - stat = 0; - } - - return stat; -} - -/*****************************************************/ -/* Module Init & Exit functions */ -/*****************************************************/ - -static int __init -virthba_parse_line(char *str) -{ - return 1; -} - -static void __init -virthba_parse_options(char *line) -{ - char *next = line; - - POSTCODE_LINUX_2(VHBA_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - if (!line || !*line) - return; - while ((line = next)) { - next = strchr(line, ' '); - if (next) - *next++ = 0; - virthba_parse_line(line); - } - - POSTCODE_LINUX_2(VHBA_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); -} - -static int __init -virthba_mod_init(void) -{ - int error; - int i; - - if (!unisys_spar_platform) - return -ENODEV; - - POSTCODE_LINUX_2(VHBA_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - virthba_parse_options(virthba_options); - - error = virtpci_register_driver(&virthba_driver); - if (error < 0) { - POSTCODE_LINUX_3(VHBA_CREATE_FAILURE_PC, error, - POSTCODE_SEVERITY_ERR); - } else { - /* create the debugfs directories and entries */ - virthba_debugfs_dir = debugfs_create_dir("virthba", NULL); - debugfs_create_file("info", S_IRUSR, virthba_debugfs_dir, - NULL, &debugfs_info_fops); - debugfs_create_u32("rqwait_usecs", S_IRUSR | S_IWUSR, - virthba_debugfs_dir, &rsltq_wait_usecs); - debugfs_create_file("enable_ints", S_IWUSR, - virthba_debugfs_dir, NULL, - &debugfs_enable_ints_fops); - /* Initialize dar_work_queue */ - INIT_WORK(&dar_work_queue, do_disk_add_remove); - spin_lock_init(&dar_work_queue_lock); - - /* clear out array */ - for (i = 0; i < VIRTHBASOPENMAX; i++) - virthbas_open[i].virthbainfo = NULL; - /* Initialize the serverdown workqueue */ - virthba_serverdown_workqueue = - create_singlethread_workqueue("virthba_serverdown"); - if (!virthba_serverdown_workqueue) { - POSTCODE_LINUX_2(VHBA_CREATE_FAILURE_PC, - POSTCODE_SEVERITY_ERR); - error = -1; - } - } - - POSTCODE_LINUX_2(VHBA_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return error; -} - -static ssize_t -virthba_acquire_lun(struct device *cdev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct uisscsi_dest vdest; - struct Scsi_Host *shost = class_to_shost(cdev); - int i; - - i = sscanf(buf, "%d-%d-%d", &vdest.channel, &vdest.id, &vdest.lun); - if (i != 3) - return i; - - return forward_vdiskmgmt_command(VDISK_MGMT_ACQUIRE, shost, &vdest); -} - -static ssize_t -virthba_release_lun(struct device *cdev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct uisscsi_dest vdest; - struct Scsi_Host *shost = class_to_shost(cdev); - int i; - - i = sscanf(buf, "%d-%d-%d", &vdest.channel, &vdest.id, &vdest.lun); - if (i != 3) - return i; - - return forward_vdiskmgmt_command(VDISK_MGMT_RELEASE, shost, &vdest); -} - -#define CLASS_DEVICE_ATTR(_name, _mode, _show, _store) \ - struct device_attribute class_device_attr_##_name = \ - __ATTR(_name, _mode, _show, _store) - -static CLASS_DEVICE_ATTR(acquire_lun, S_IWUSR, NULL, virthba_acquire_lun); -static CLASS_DEVICE_ATTR(release_lun, S_IWUSR, NULL, virthba_release_lun); - -static DEVICE_ATTRIBUTE *virthba_shost_attrs[] = { - &class_device_attr_acquire_lun, - &class_device_attr_release_lun, - NULL -}; - -static void __exit -virthba_mod_exit(void) -{ - virtpci_unregister_driver(&virthba_driver); - /* unregister is going to call virthba_remove */ - /* destroy serverdown completion workqueue */ - if (virthba_serverdown_workqueue) { - destroy_workqueue(virthba_serverdown_workqueue); - virthba_serverdown_workqueue = NULL; - } - - debugfs_remove_recursive(virthba_debugfs_dir); -} - -/* specify function to be run at module insertion time */ -module_init(virthba_mod_init); - -/* specify function to be run when module is removed */ -module_exit(virthba_mod_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Usha Srinivasan"); -MODULE_ALIAS("uisvirthba"); - /* this is extracted during depmod and kept in modules.dep */ -/* module parameter */ -module_param(virthba_options, charp, S_IRUGO); diff --git a/drivers/staging/unisys/virthba/virthba.h b/drivers/staging/unisys/virthba/virthba.h deleted file mode 100644 index 59901668d..000000000 --- a/drivers/staging/unisys/virthba/virthba.h +++ /dev/null @@ -1,27 +0,0 @@ -/* virthba.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * Unisys Virtual HBA driver header - */ - -#ifndef __VIRTHBA_H__ -#define __VIRTHBA_H__ - -#define VIRTHBA_VERSION "01.00" - -#endif /* __VIRTHBA_H__ */ diff --git a/drivers/staging/unisys/virtpci/Kconfig b/drivers/staging/unisys/virtpci/Kconfig deleted file mode 100644 index 6d19482ce..000000000 --- a/drivers/staging/unisys/virtpci/Kconfig +++ /dev/null @@ -1,10 +0,0 @@ -# -# Unisys virtpci configuration -# - -config UNISYS_VIRTPCI - tristate "Unisys virtpci driver" - select UNISYS_UISLIB - ---help--- - If you say Y here, you will enable the Unisys virtpci driver. - diff --git a/drivers/staging/unisys/virtpci/Makefile b/drivers/staging/unisys/virtpci/Makefile deleted file mode 100644 index a26c69621..000000000 --- a/drivers/staging/unisys/virtpci/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -# -# Makefile for Unisys virtpci -# - -obj-$(CONFIG_UNISYS_VIRTPCI) += virtpci.o - -ccflags-y += -Idrivers/staging/unisys/include -ccflags-y += -Idrivers/staging/unisys/uislib -ccflags-y += -Idrivers/staging/unisys/common-spar/include -ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels diff --git a/drivers/staging/unisys/virtpci/virtpci.c b/drivers/staging/unisys/virtpci/virtpci.c deleted file mode 100644 index d5ad01783..000000000 --- a/drivers/staging/unisys/virtpci/virtpci.c +++ /dev/null @@ -1,1394 +0,0 @@ -/* virtpci.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#define EXPORT_SYMTAB - -#include <linux/kernel.h> -#ifdef CONFIG_MODVERSIONS -#include <config/modversions.h> -#endif -#include "diagnostics/appos_subsystems.h" -#include "uisutils.h" -#include "vbuschannel.h" -#include "vbushelper.h" -#include <linux/types.h> -#include <linux/io.h> -#include <linux/uuid.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/pci.h> -#include <linux/device.h> -#include <linux/list.h> -#include <linux/slab.h> -#include <linux/mod_devicetable.h> -#include <linux/if_ether.h> -#include <linux/version.h> -#include <linux/debugfs.h> -#include "version.h" -#include "guestlinuxdebug.h" -#include "timskmod.h" - -struct driver_private { - struct kobject kobj; - struct klist klist_devices; - struct klist_node knode_bus; - struct module_kobject *mkobj; - struct device_driver *driver; -}; - -#define to_driver(obj) container_of(obj, struct driver_private, kobj) - -/* bus_id went away in 2.6.30 - the size was 20 bytes, so we'll define - * it ourselves, and a macro to make getting the field a bit simpler. - */ -#ifndef BUS_ID_SIZE -#define BUS_ID_SIZE 20 -#endif - -#define BUS_ID(x) dev_name(x) - -/* MAX_BUF = 4 busses x ( 32 devices/bus + 1 busline) x 80 characters - * = 10,560 bytes ~ 2^14 = 16,384 bytes - */ -#define MAX_BUF 16384 - -#include "virtpci.h" - -/* this is shorter than using __FILE__ (full path name) in - * debug/info/error messages - */ -#define CURRENT_FILE_PC VIRT_PCI_PC_virtpci_c -#define __MYFILE__ "virtpci.c" - -#define VIRTPCI_VERSION "01.00" - -/*****************************************************/ -/* Forward declarations */ -/*****************************************************/ - -static int delete_vbus_device(struct device *vbus, void *data); -static int match_busid(struct device *dev, void *data); -static void virtpci_bus_release(struct device *dev); -static void virtpci_device_release(struct device *dev); -static int virtpci_device_add(struct device *parentbus, int devtype, - struct add_virt_guestpart *addparams, - struct scsi_adap_info *scsi, - struct net_adap_info *net); -static int virtpci_device_del(struct device *parentbus, int devtype, - struct vhba_wwnn *wwnn, unsigned char macaddr[]); -static int virtpci_device_serverdown(struct device *parentbus, int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]); -static int virtpci_device_serverup(struct device *parentbus, int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]); -static ssize_t virtpci_driver_attr_show(struct kobject *kobj, - struct attribute *attr, char *buf); -static ssize_t virtpci_driver_attr_store(struct kobject *kobj, - struct attribute *attr, - const char *buf, size_t count); -static int virtpci_bus_match(struct device *dev, struct device_driver *drv); -static int virtpci_uevent(struct device *dev, struct kobj_uevent_env *env); -static int virtpci_device_probe(struct device *dev); -static int virtpci_device_remove(struct device *dev); - -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset); - -static const struct file_operations debugfs_info_fops = { - .read = info_debugfs_read, -}; - -/*****************************************************/ -/* Globals */ -/*****************************************************/ - -/* methods in bus_type struct allow the bus code to serve as an - * intermediary between the device core and individual device core and - * individual drivers - */ -static struct bus_type virtpci_bus_type = { - .name = "uisvirtpci", - .match = virtpci_bus_match, - .uevent = virtpci_uevent, -}; - -static struct device virtpci_rootbus_device = { - .init_name = "vbusroot", /* root bus */ - .release = virtpci_bus_release -}; - -/* filled in with info about parent chipset driver when we register with it */ -static struct ultra_vbus_deviceinfo chipset_driver_info; - -static const struct sysfs_ops virtpci_driver_sysfs_ops = { - .show = virtpci_driver_attr_show, - .store = virtpci_driver_attr_store, -}; - -static struct kobj_type virtpci_driver_kobj_type = { - .sysfs_ops = &virtpci_driver_sysfs_ops, -}; - -static struct virtpci_dev *vpcidev_list_head; -static DEFINE_RWLOCK(vpcidev_list_lock); - -/* filled in with info about this driver, wrt it servicing client busses */ -static struct ultra_vbus_deviceinfo bus_driver_info; - -/*****************************************************/ -/* debugfs entries */ -/*****************************************************/ -/* dentry is used to create the debugfs entry directory - * for virtpci - */ -static struct dentry *virtpci_debugfs_dir; - -struct virtpci_busdev { - struct device virtpci_bus_device; -}; - -/*****************************************************/ -/* Local functions */ -/*****************************************************/ - -static inline -int WAIT_FOR_IO_CHANNEL(struct spar_io_channel_protocol __iomem *chanptr) -{ - int count = 120; - - while (count > 0) { - if (SPAR_CHANNEL_SERVER_READY(&chanptr->channel_header)) - return 1; - UIS_THREAD_WAIT_SEC(1); - count--; - } - return 0; -} - -/* Write the contents of <info> to the ULTRA_VBUS_CHANNEL_PROTOCOL.ChpInfo. */ -static int write_vbus_chp_info(struct spar_vbus_channel_protocol *chan, - struct ultra_vbus_deviceinfo *info) -{ - int off; - - if (!chan) - return -1; - - off = sizeof(struct channel_header) + chan->hdr_info.chp_info_offset; - if (chan->hdr_info.chp_info_offset == 0) { - return -1; - } - memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); - return 0; -} - -/* Write the contents of <info> to the ULTRA_VBUS_CHANNEL_PROTOCOL.BusInfo. */ -static int write_vbus_bus_info(struct spar_vbus_channel_protocol *chan, - struct ultra_vbus_deviceinfo *info) -{ - int off; - - if (!chan) - return -1; - - off = sizeof(struct channel_header) + chan->hdr_info.bus_info_offset; - if (chan->hdr_info.bus_info_offset == 0) - return -1; - memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); - return 0; -} - -/* Write the contents of <info> to the - * ULTRA_VBUS_CHANNEL_PROTOCOL.DevInfo[<devix>]. - */ -static int -write_vbus_dev_info(struct spar_vbus_channel_protocol *chan, - struct ultra_vbus_deviceinfo *info, int devix) -{ - int off; - - if (!chan) - return -1; - - off = - (sizeof(struct channel_header) + - chan->hdr_info.dev_info_offset) + - (chan->hdr_info.device_info_struct_bytes * devix); - if (chan->hdr_info.dev_info_offset == 0) - return -1; - - memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); - return 0; -} - -/* adds a vbus - * returns 0 failure, 1 success, - */ -static int add_vbus(struct add_vbus_guestpart *addparams) -{ - int ret; - struct device *vbus; - - vbus = kzalloc(sizeof(*vbus), GFP_ATOMIC); - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - if (!vbus) - return 0; - - dev_set_name(vbus, "vbus%d", addparams->bus_no); - vbus->release = virtpci_bus_release; - vbus->parent = &virtpci_rootbus_device; /* root bus is parent */ - vbus->bus = &virtpci_bus_type; /* bus type */ - vbus->platform_data = (__force void *)addparams->chanptr; - - /* register a virt bus device - - * this bus shows up under /sys/devices with .name value - * "virtpci%d" any devices added to this bus then show up under - * /sys/devices/virtpci0 - */ - ret = device_register(vbus); - if (ret) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - write_vbus_chp_info(vbus->platform_data /* chanptr */, - &chipset_driver_info); - write_vbus_bus_info(vbus->platform_data /* chanptr */, - &bus_driver_info); - POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return 1; -} - -/* for CHANSOCK wwwnn/max are AUTO-GENERATED; for normal channels, - * wwnn/max are in the channel header. - */ -#define GET_SCSIADAPINFO_FROM_CHANPTR(chanptr) { \ - memcpy_fromio(&scsi.wwnn, \ - &((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vhba.wwnn, \ - sizeof(struct vhba_wwnn)); \ - memcpy_fromio(&scsi.max, \ - &((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vhba.max, \ - sizeof(struct vhba_config_max)); \ - } - -/* adds a vhba - * returns 0 failure, 1 success, - */ -static int add_vhba(struct add_virt_guestpart *addparams) -{ - int i; - struct scsi_adap_info scsi; - struct device *vbus; - unsigned char busid[BUS_ID_SIZE]; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - if (!WAIT_FOR_IO_CHANNEL - ((struct spar_io_channel_protocol __iomem *)addparams->chanptr)) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - GET_SCSIADAPINFO_FROM_CHANPTR(addparams->chanptr); - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", addparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - i = virtpci_device_add(vbus, VIRTHBA_TYPE, addparams, &scsi, NULL); - if (i) { - POSTCODE_LINUX_3(VPCI_CREATE_EXIT_PC, i, - POSTCODE_SEVERITY_INFO); - } - return i; -} - -/* for CHANSOCK macaddr is AUTO-GENERATED; for normal channels, - * macaddr is in the channel header. - */ -#define GET_NETADAPINFO_FROM_CHANPTR(chanptr) { \ - memcpy_fromio(net.mac_addr, \ - ((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vnic.macaddr, \ - MAX_MACADDR_LEN); \ - net.num_rcv_bufs = \ - readl(&((struct spar_io_channel_protocol __iomem *)\ - chanptr)->vnic.num_rcv_bufs); \ - net.mtu = readl(&((struct spar_io_channel_protocol __iomem *) \ - chanptr)->vnic.mtu); \ - memcpy_fromio(&net.zone_uuid, \ - &((struct spar_io_channel_protocol __iomem *)\ - chanptr)->vnic.zone_uuid, \ - sizeof(uuid_le)); \ -} - -/* adds a vnic - * returns 0 failure, 1 success, - */ -static int -add_vnic(struct add_virt_guestpart *addparams) -{ - int i; - struct net_adap_info net; - struct device *vbus; - unsigned char busid[BUS_ID_SIZE]; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - if (!WAIT_FOR_IO_CHANNEL - ((struct spar_io_channel_protocol __iomem *)addparams->chanptr)) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - GET_NETADAPINFO_FROM_CHANPTR(addparams->chanptr); - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", addparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - i = virtpci_device_add(vbus, VIRTNIC_TYPE, addparams, NULL, &net); - if (i) { - POSTCODE_LINUX_3(VPCI_CREATE_EXIT_PC, i, - POSTCODE_SEVERITY_INFO); - return 1; - } - return 0; -} - -/* delete vbus - * returns 0 failure, 1 success, - */ -static int -delete_vbus(struct del_vbus_guestpart *delparams) -{ - struct device *vbus; - unsigned char busid[BUS_ID_SIZE]; - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", delparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - /* ensure that bus has no devices? -- TBD */ - return 1; -} - -static int -delete_vbus_device(struct device *vbus, void *data) -{ - struct device *dev = &virtpci_rootbus_device; - - if ((data) && match_busid(vbus, (void *)BUS_ID(dev))) { - /* skip it - don't delete root bus */ - return 0; /* pretend no error */ - } - device_unregister(vbus); - kfree(vbus); - return 0; /* no error */ -} - -/* pause vhba -* returns 0 failure, 1 success, -*/ -static int pause_vhba(struct pause_virt_guestpart *pauseparams) -{ - int i; - struct scsi_adap_info scsi; - - GET_SCSIADAPINFO_FROM_CHANPTR(pauseparams->chanptr); - - i = virtpci_device_serverdown(NULL /*no parent bus */, VIRTHBA_TYPE, - &scsi.wwnn, NULL); - return i; -} - -/* pause vnic - * returns 0 failure, 1 success, - */ -static int pause_vnic(struct pause_virt_guestpart *pauseparams) -{ - int i; - struct net_adap_info net; - - GET_NETADAPINFO_FROM_CHANPTR(pauseparams->chanptr); - - i = virtpci_device_serverdown(NULL /*no parent bus */, VIRTNIC_TYPE, - NULL, net.mac_addr); - return i; -} - -/* resume vhba - * returns 0 failure, 1 success, - */ -static int resume_vhba(struct resume_virt_guestpart *resumeparams) -{ - int i; - struct scsi_adap_info scsi; - - GET_SCSIADAPINFO_FROM_CHANPTR(resumeparams->chanptr); - - i = virtpci_device_serverup(NULL /*no parent bus */, VIRTHBA_TYPE, - &scsi.wwnn, NULL); - return i; -} - -/* resume vnic -* returns 0 failure, 1 success, -*/ -static int -resume_vnic(struct resume_virt_guestpart *resumeparams) -{ - int i; - struct net_adap_info net; - - GET_NETADAPINFO_FROM_CHANPTR(resumeparams->chanptr); - - i = virtpci_device_serverup(NULL /*no parent bus */, VIRTNIC_TYPE, - NULL, net.mac_addr); - return i; -} - -/* delete vhba -* returns 0 failure, 1 success, -*/ -static int delete_vhba(struct del_virt_guestpart *delparams) -{ - int i; - struct scsi_adap_info scsi; - - GET_SCSIADAPINFO_FROM_CHANPTR(delparams->chanptr); - - i = virtpci_device_del(NULL /*no parent bus */, VIRTHBA_TYPE, - &scsi.wwnn, NULL); - if (i) { - return 1; - } - return 0; -} - -/* deletes a vnic - * returns 0 failure, 1 success, - */ -static int delete_vnic(struct del_virt_guestpart *delparams) -{ - int i; - struct net_adap_info net; - - GET_NETADAPINFO_FROM_CHANPTR(delparams->chanptr); - - i = virtpci_device_del(NULL /*no parent bus */, VIRTNIC_TYPE, NULL, - net.mac_addr); - return i; -} - -#define DELETE_ONE_VPCIDEV(vpcidev) { \ - device_unregister(&vpcidev->generic_dev); \ - kfree(vpcidev); \ -} - -/* deletes all vhbas and vnics - * returns 0 failure, 1 success, - */ -static void delete_all(void) -{ - int count = 0; - unsigned long flags; - struct virtpci_dev *tmpvpcidev, *nextvpcidev; - - /* delete the entire vhba/vnic list in one shot */ - write_lock_irqsave(&vpcidev_list_lock, flags); - tmpvpcidev = vpcidev_list_head; - vpcidev_list_head = NULL; - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - /* delete one vhba/vnic at a time */ - while (tmpvpcidev) { - nextvpcidev = tmpvpcidev->next; - /* delete the vhba/vnic at tmpvpcidev */ - DELETE_ONE_VPCIDEV(tmpvpcidev); - tmpvpcidev = nextvpcidev; - count++; - } - - /* now delete each vbus */ - bus_for_each_dev(&virtpci_bus_type, NULL, (void *)1, - delete_vbus_device); -} - -/* deletes all vnics or vhbas - * returns 0 failure, 1 success, - */ -static int delete_all_virt(enum virtpci_dev_type devtype, - struct del_vbus_guestpart *delparams) -{ - int i; - unsigned char busid[BUS_ID_SIZE]; - struct device *vbus; - - /* find bus device with the busid that matches match_busid */ - sprintf(busid, "vbus%d", delparams->bus_no); - vbus = bus_find_device(&virtpci_bus_type, NULL, - (void *)busid, match_busid); - if (!vbus) - return 0; - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - /* delete all vhbas/vnics */ - i = virtpci_device_del(vbus, devtype, NULL, NULL); - return 1; -} - -static int virtpci_ctrlchan_func(struct guest_msgs *msg) -{ - switch (msg->msgtype) { - case GUEST_ADD_VBUS: - return add_vbus(&msg->add_vbus); - case GUEST_ADD_VHBA: - return add_vhba(&msg->add_vhba); - case GUEST_ADD_VNIC: - return add_vnic(&msg->add_vnic); - case GUEST_DEL_VBUS: - return delete_vbus(&msg->del_vbus); - case GUEST_DEL_VHBA: - return delete_vhba(&msg->del_vhba); - case GUEST_DEL_VNIC: - return delete_vnic(&msg->del_vhba); - case GUEST_DEL_ALL_VHBAS: - return delete_all_virt(VIRTHBA_TYPE, &msg->del_all_vhbas); - case GUEST_DEL_ALL_VNICS: - return delete_all_virt(VIRTNIC_TYPE, &msg->del_all_vnics); - case GUEST_DEL_ALL_VBUSES: - delete_all(); - return 1; - case GUEST_PAUSE_VHBA: - return pause_vhba(&msg->pause_vhba); - case GUEST_PAUSE_VNIC: - return pause_vnic(&msg->pause_vnic); - case GUEST_RESUME_VHBA: - return resume_vhba(&msg->resume_vhba); - case GUEST_RESUME_VNIC: - return resume_vnic(&msg->resume_vnic); - default: - return 0; - } -} - -/* same as driver_helper in bus.c linux */ -static int match_busid(struct device *dev, void *data) -{ - const char *name = data; - - if (strcmp(name, BUS_ID(dev)) == 0) - return 1; - return 0; -} - -/*****************************************************/ -/* Bus functions */ -/*****************************************************/ - -static const struct pci_device_id * -virtpci_match_device(const struct pci_device_id *ids, - const struct virtpci_dev *dev) -{ - while (ids->vendor || ids->subvendor || ids->class_mask) { - if ((ids->vendor == dev->vendor) && - (ids->device == dev->device)) - return ids; - - ids++; - } - return NULL; -} - -/* NOTE: !!!!!! This function is called when a new device is added -* for this bus. Or, it is called for existing devices when a new -* driver is added for this bus. It returns nonzero if a given device -* can be handled by the given driver. -*/ -static int virtpci_bus_match(struct device *dev, struct device_driver *drv) -{ - struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev); - struct virtpci_driver *virtpcidrv = driver_to_virtpci_driver(drv); - int match = 0; - - /* check ids list for a match */ - if (virtpci_match_device(virtpcidrv->id_table, virtpcidev)) - match = 1; - - return match; /* 0 - no match; 1 - yes it matches */ -} - -static int virtpci_uevent(struct device *dev, struct kobj_uevent_env *env) -{ - /* add variables to the environment prior to the generation of - * hotplug events to user space - */ - if (add_uevent_var(env, "VIRTPCI_VERSION=%s", VIRTPCI_VERSION)) - return -ENOMEM; - return 0; -} - -/* For a child device just created on a client bus, fill in - * information about the driver that is controlling this device into - * the appropriate slot within the vbus channel of the bus - * instance. - */ -static void fix_vbus_dev_info(struct device *dev, int dev_no, int dev_type, - struct virtpci_driver *virtpcidrv) -{ - struct device *vbus; - void *chan; - struct ultra_vbus_deviceinfo dev_info; - const char *stype; - - if (!dev) - return; - if (!virtpcidrv) - return; - - vbus = dev->parent; - if (!vbus) - return; - - chan = vbus->platform_data; - if (!chan) - return; - - switch (dev_type) { - case PCI_DEVICE_ID_VIRTHBA: - stype = "vHBA"; - break; - case PCI_DEVICE_ID_VIRTNIC: - stype = "vNIC"; - break; - default: - stype = "unknown"; - break; - } - bus_device_info_init(&dev_info, stype, - virtpcidrv->name, - virtpcidrv->version, - virtpcidrv->vertag); - write_vbus_dev_info(chan, &dev_info, dev_no); - - /* Re-write bus+chipset info, because it is possible that this - * was previously written by our good counterpart, visorbus. - */ - write_vbus_chp_info(chan, &chipset_driver_info); - write_vbus_bus_info(chan, &bus_driver_info); -} - -/* This function is called to query the existence of a specific device -* and whether this driver can work with it. It should return -ENODEV -* in case of failure. -*/ -static int virtpci_device_probe(struct device *dev) -{ - struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev); - struct virtpci_driver *virtpcidrv = - driver_to_virtpci_driver(dev->driver); - const struct pci_device_id *id; - int error = 0; - - POSTCODE_LINUX_2(VPCI_PROBE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - /* static match and static probe vs dynamic match & dynamic - * probe - do we care?. - */ - if (!virtpcidrv->id_table) - return -ENODEV; - - id = virtpci_match_device(virtpcidrv->id_table, virtpcidev); - if (!id) - return -ENODEV; - - /* increment reference count */ - get_device(dev); - - /* if virtpcidev is not already claimed & probe function is - * valid, probe it - */ - if (!virtpcidev->mydriver && virtpcidrv->probe) { - /* call the probe function - virthba or virtnic probe - * is what it should be - */ - error = virtpcidrv->probe(virtpcidev, id); - if (!error) { - fix_vbus_dev_info(dev, virtpcidev->device_no, - virtpcidev->device, virtpcidrv); - virtpcidev->mydriver = virtpcidrv; - POSTCODE_LINUX_2(VPCI_PROBE_EXIT_PC, - POSTCODE_SEVERITY_INFO); - } else { - put_device(dev); - } - } - POSTCODE_LINUX_2(VPCI_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return error; /* -ENODEV for probe failure */ -} - -static int virtpci_device_remove(struct device *dev_) -{ - /* dev_ passed in is the HBA device which we called - * generic_dev in our virtpcidev struct - */ - struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev_); - struct virtpci_driver *virtpcidrv = virtpcidev->mydriver; - - if (virtpcidrv) { - /* TEMP: assuming we have only one such driver for now */ - if (virtpcidrv->remove) - virtpcidrv->remove(virtpcidev); - virtpcidev->mydriver = NULL; - } - - put_device(dev_); - return 0; -} - -/*****************************************************/ -/* Bus functions */ -/*****************************************************/ - -static void virtpci_bus_release(struct device *dev) -{ -} - -/*****************************************************/ -/* Adapter functions */ -/*****************************************************/ - -/* scsi is expected to be NULL for VNIC add - * net is expected to be NULL for VHBA add - */ -static int virtpci_device_add(struct device *parentbus, int devtype, - struct add_virt_guestpart *addparams, - struct scsi_adap_info *scsi, - struct net_adap_info *net) -{ - struct virtpci_dev *virtpcidev = NULL; - struct virtpci_dev *tmpvpcidev = NULL, *prev; - unsigned long flags; - int ret; - struct spar_io_channel_protocol __iomem *io_chan = NULL; - struct device *dev; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) { - POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, devtype, - POSTCODE_SEVERITY_ERR); - return 0; - } - - /* add a Virtual Device */ - virtpcidev = kzalloc(sizeof(*virtpcidev), GFP_ATOMIC); - if (!virtpcidev) { - POSTCODE_LINUX_2(MALLOC_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - /* initialize stuff unique to virtpci_dev struct */ - virtpcidev->devtype = devtype; - if (devtype == VIRTHBA_TYPE) { - virtpcidev->device = PCI_DEVICE_ID_VIRTHBA; - virtpcidev->scsi = *scsi; - } else { - virtpcidev->device = PCI_DEVICE_ID_VIRTNIC; - virtpcidev->net = *net; - } - virtpcidev->vendor = PCI_VENDOR_ID_UNISYS; - virtpcidev->bus_no = addparams->bus_no; - virtpcidev->device_no = addparams->device_no; - - virtpcidev->queueinfo.chan = addparams->chanptr; - virtpcidev->queueinfo.send_int_if_needed = NULL; - - /* Set up safe queue... */ - io_chan = (struct spar_io_channel_protocol __iomem *) - virtpcidev->queueinfo.chan; - - virtpcidev->intr = addparams->intr; - - /* initialize stuff in the device portion of the struct */ - virtpcidev->generic_dev.bus = &virtpci_bus_type; - virtpcidev->generic_dev.parent = parentbus; - virtpcidev->generic_dev.release = virtpci_device_release; - - dev_set_name(&virtpcidev->generic_dev, "%x:%x", - addparams->bus_no, addparams->device_no); - - /* add the vhba/vnic to virtpci device list - but check for - * duplicate wwnn/macaddr first - */ - write_lock_irqsave(&vpcidev_list_lock, flags); - for (tmpvpcidev = vpcidev_list_head; tmpvpcidev; - tmpvpcidev = tmpvpcidev->next) { - if (devtype == VIRTHBA_TYPE) { - if ((tmpvpcidev->scsi.wwnn.wwnn1 == scsi->wwnn.wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == scsi->wwnn.wwnn2)) { - /* duplicate - already have vpcidev - with this wwnn */ - break; - } - } else - if (memcmp - (tmpvpcidev->net.mac_addr, net->mac_addr, - MAX_MACADDR_LEN) == 0) { - /* duplicate - already have vnic with this wwnn */ - break; - } - } - if (tmpvpcidev) { - /* found a vhba/vnic already in the list with same - * wwnn or macaddr - reject add - */ - write_unlock_irqrestore(&vpcidev_list_lock, flags); - kfree(virtpcidev); - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - return 0; - } - - /* add it at the head */ - if (!vpcidev_list_head) { - vpcidev_list_head = virtpcidev; - } else { - /* insert virtpcidev at the head of our linked list of - * vpcidevs - */ - virtpcidev->next = vpcidev_list_head; - vpcidev_list_head = virtpcidev; - } - - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - /* Must transition channel to ATTACHED state BEFORE - * registering the device, because polling of the channel - * queues can begin at any time after device_register(). - */ - dev = &virtpcidev->generic_dev; - SPAR_CHANNEL_CLIENT_TRANSITION(addparams->chanptr, - BUS_ID(dev), - CHANNELCLI_ATTACHED, NULL); - - /* don't register until device has been added to - * list. Otherwise, a device_unregister from this function can - * cause a "scheduling while atomic". - */ - ret = device_register(&virtpcidev->generic_dev); - /* NOTE: THIS IS CALLING HOTPLUG virtpci_hotplug!!! - * This call to device_register results in virtpci_bus_match - * being called !!!!! And, if match returns success, then - * virtpcidev->generic_dev.driver is setup to core_driver, - * i.e., virtpci and the probe function - * virtpcidev->generic_dev.driver->probe is called which - * results in virtpci_device_probe being called. And if - * virtpci_device_probe is successful - */ - if (ret) { - dev = &virtpcidev->generic_dev; - SPAR_CHANNEL_CLIENT_TRANSITION(addparams->chanptr, - BUS_ID(dev), - CHANNELCLI_DETACHED, NULL); - /* remove virtpcidev, the one we just added, from the list */ - write_lock_irqsave(&vpcidev_list_lock, flags); - for (tmpvpcidev = vpcidev_list_head, prev = NULL; - tmpvpcidev; - prev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { - if (tmpvpcidev == virtpcidev) { - if (prev) - prev->next = tmpvpcidev->next; - else - vpcidev_list_head = tmpvpcidev->next; - break; - } - } - write_unlock_irqrestore(&vpcidev_list_lock, flags); - kfree(virtpcidev); - return 0; - } - - POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return 1; -} - -static int virtpci_device_serverdown(struct device *parentbus, - int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]) -{ - int pausethisone = 0; - bool found = false; - struct virtpci_dev *tmpvpcidev, *prevvpcidev; - struct virtpci_driver *vpcidriver; - unsigned long flags; - int rc = 0; - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - /* find the vhba or vnic in virtpci device list */ - write_lock_irqsave(&vpcidev_list_lock, flags); - - for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; - (tmpvpcidev && !found); - prevvpcidev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { - if (tmpvpcidev->devtype != devtype) - continue; - - if (devtype == VIRTHBA_TYPE) { - pausethisone = - ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); - /* devtype is vhba, we're pausing vhba whose - * wwnn matches the current device's wwnn - */ - } else { /* VIRTNIC_TYPE */ - pausethisone = - memcmp(tmpvpcidev->net.mac_addr, macaddr, - MAX_MACADDR_LEN) == 0; - /* devtype is vnic, we're pausing vnic whose - * macaddr matches the current device's macaddr */ - } - - if (!pausethisone) - continue; - - found = true; - vpcidriver = tmpvpcidev->mydriver; - rc = vpcidriver->suspend(tmpvpcidev, 0); - } - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - if (!found) - return 0; - - return rc; -} - -static int virtpci_device_serverup(struct device *parentbus, - int devtype, - struct vhba_wwnn *wwnn, - unsigned char macaddr[]) -{ - int resumethisone = 0; - bool found = false; - struct virtpci_dev *tmpvpcidev, *prevvpcidev; - struct virtpci_driver *vpcidriver; - unsigned long flags; - int rc = 0; - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - - /* find the vhba or vnic in virtpci device list */ - write_lock_irqsave(&vpcidev_list_lock, flags); - - for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; - (tmpvpcidev && !found); - prevvpcidev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { - if (tmpvpcidev->devtype != devtype) - continue; - - if (devtype == VIRTHBA_TYPE) { - resumethisone = - ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); - /* devtype is vhba, we're resuming vhba whose - * wwnn matches the current device's wwnn */ - } else { /* VIRTNIC_TYPE */ - resumethisone = - memcmp(tmpvpcidev->net.mac_addr, macaddr, - MAX_MACADDR_LEN) == 0; - /* devtype is vnic, we're resuming vnic whose - * macaddr matches the current device's macaddr */ - } - - if (!resumethisone) - continue; - - found = true; - vpcidriver = tmpvpcidev->mydriver; - /* This should be done at BUS resume time, but an - * existing problem prevents us from ever getting a bus - * resume... This hack would fail to work should we - * ever have a bus that contains NO devices, since we - * would never even get here in that case. - */ - fix_vbus_dev_info(&tmpvpcidev->generic_dev, - tmpvpcidev->device_no, - tmpvpcidev->device, vpcidriver); - rc = vpcidriver->resume(tmpvpcidev); - } - - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - if (!found) - return 0; - - return rc; -} - -static int virtpci_device_del(struct device *parentbus, - int devtype, struct vhba_wwnn *wwnn, - unsigned char macaddr[]) -{ - int count = 0, all = 0, delthisone; - struct virtpci_dev *tmpvpcidev, *prevvpcidev, *dellist = NULL; - unsigned long flags; - -#define DEL_CONTINUE { \ - prevvpcidev = tmpvpcidev;\ - tmpvpcidev = tmpvpcidev->next;\ - continue; \ -} - - if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) - return 0; - - /* see if we are to delete all - NOTE: all implies we have a - * valid parentbus - */ - all = ((devtype == VIRTHBA_TYPE) && (!wwnn)) || - ((devtype == VIRTNIC_TYPE) && (!macaddr)); - - /* find all the vhba or vnic or both in virtpci device list - * keep list of ones we are deleting so we can call - * device_unregister after we release the lock; otherwise we - * encounter "schedule while atomic" - */ - write_lock_irqsave(&vpcidev_list_lock, flags); - for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; tmpvpcidev;) { - if (tmpvpcidev->devtype != devtype) - DEL_CONTINUE; - - if (all) { - delthisone = - (tmpvpcidev->generic_dev.parent == parentbus); - /* we're deleting all vhbas or vnics on the - * specified parent bus - */ - } else if (devtype == VIRTHBA_TYPE) { - delthisone = - ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && - (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); - /* devtype is vhba, we're deleting vhba whose - * wwnn matches the current device's wwnn - */ - } else { /* VIRTNIC_TYPE */ - delthisone = - memcmp(tmpvpcidev->net.mac_addr, macaddr, - MAX_MACADDR_LEN) == 0; - /* devtype is vnic, we're deleting vnic whose - * macaddr matches the current device's macaddr - */ - } - - if (!delthisone) - DEL_CONTINUE; - - /* take vhba/vnic out of the list */ - if (prevvpcidev) - /* not at head */ - prevvpcidev->next = tmpvpcidev->next; - else - vpcidev_list_head = tmpvpcidev->next; - - /* add it to our deletelist */ - tmpvpcidev->next = dellist; - dellist = tmpvpcidev; - - count++; - if (!all) - break; /* done */ - /* going to top of loop again - set tmpvpcidev to next - * one we're to process - */ - if (prevvpcidev) - tmpvpcidev = prevvpcidev->next; - else - tmpvpcidev = vpcidev_list_head; - } - write_unlock_irqrestore(&vpcidev_list_lock, flags); - - if (!all && (count == 0)) - return 0; - - /* now delete each one from delete list */ - while (dellist) { - /* save next */ - tmpvpcidev = dellist->next; - /* delete the vhba/vnic at dellist */ - DELETE_ONE_VPCIDEV(dellist); - /* do next */ - dellist = tmpvpcidev; - } - - return count; -} - -static void virtpci_device_release(struct device *dev_) -{ - /* this function is called when the last reference to the - * device is removed - */ -} - -/*****************************************************/ -/* Driver functions */ -/*****************************************************/ - -#define kobj_to_device_driver(obj) container_of(obj, struct device_driver, kobj) -#define attribute_to_driver_attribute(obj) \ - container_of(obj, struct driver_attribute, attr) - -static ssize_t virtpci_driver_attr_show(struct kobject *kobj, - struct attribute *attr, - char *buf) -{ - struct driver_attribute *dattr = attribute_to_driver_attribute(attr); - ssize_t ret = 0; - - struct driver_private *dprivate = to_driver(kobj); - struct device_driver *driver = dprivate->driver; - - if (dattr->show) - ret = dattr->show(driver, buf); - - return ret; -} - -static ssize_t virtpci_driver_attr_store(struct kobject *kobj, - struct attribute *attr, - const char *buf, size_t count) -{ - struct driver_attribute *dattr = attribute_to_driver_attribute(attr); - ssize_t ret = 0; - - struct driver_private *dprivate = to_driver(kobj); - struct device_driver *driver = dprivate->driver; - - if (dattr->store) - ret = dattr->store(driver, buf, count); - - return ret; -} - -/* register a new virtpci driver */ -int virtpci_register_driver(struct virtpci_driver *drv) -{ - int result = 0; - - if (!drv->id_table) - return 1; - /* initialize core driver fields needed to call driver_register */ - drv->core_driver.name = drv->name; /* name of driver in sysfs */ - drv->core_driver.bus = &virtpci_bus_type; /* type of bus this - * driver works with */ - drv->core_driver.probe = virtpci_device_probe; /* called to query the - * existence of a - * specific device and - * whether this driver - *can work with it */ - drv->core_driver.remove = virtpci_device_remove; /* called when the - * device is removed - * from the system */ - /* register with core */ - result = driver_register(&drv->core_driver); - /* calls bus_add_driver which calls driver_attach and - * module_add_driver - */ - if (result) - return result; /* failed */ - - drv->core_driver.p->kobj.ktype = &virtpci_driver_kobj_type; - - return 0; -} -EXPORT_SYMBOL_GPL(virtpci_register_driver); - -void virtpci_unregister_driver(struct virtpci_driver *drv) -{ - driver_unregister(&drv->core_driver); - /* driver_unregister calls bus_remove_driver - * bus_remove_driver calls device_detach - * device_detach calls device_release_driver for each of the - * driver's devices - * device_release driver calls drv->remove which is - * virtpci_device_remove - * virtpci_device_remove calls virthba_remove - */ -} -EXPORT_SYMBOL_GPL(virtpci_unregister_driver); - -/*****************************************************/ -/* debugfs filesystem functions */ -/*****************************************************/ -struct print_vbus_info { - int *str_pos; - char *buf; - size_t *len; -}; - -static int print_vbus(struct device *vbus, void *data) -{ - struct print_vbus_info *p = (struct print_vbus_info *)data; - - *p->str_pos += scnprintf(p->buf + *p->str_pos, *p->len - *p->str_pos, - "bus_id:%s\n", dev_name(vbus)); - return 0; -} - -static ssize_t info_debugfs_read(struct file *file, char __user *buf, - size_t len, loff_t *offset) -{ - ssize_t bytes_read = 0; - int str_pos = 0; - struct virtpci_dev *tmpvpcidev; - unsigned long flags; - struct print_vbus_info printparam; - char *vbuf; - - if (len > MAX_BUF) - len = MAX_BUF; - vbuf = kzalloc(len, GFP_KERNEL); - if (!vbuf) - return -ENOMEM; - - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - " Virtual PCI Bus devices\n"); - printparam.str_pos = &str_pos; - printparam.buf = vbuf; - printparam.len = &len; - bus_for_each_dev(&virtpci_bus_type, NULL, (void *)&printparam, - print_vbus); - - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "\n Virtual PCI devices\n"); - read_lock_irqsave(&vpcidev_list_lock, flags); - tmpvpcidev = vpcidev_list_head; - while (tmpvpcidev) { - if (tmpvpcidev->devtype == VIRTHBA_TYPE) { - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "[%d:%d] VHba:%08x:%08x max-config:%d-%d-%d-%d", - tmpvpcidev->bus_no, - tmpvpcidev->device_no, - tmpvpcidev->scsi.wwnn.wwnn1, - tmpvpcidev->scsi.wwnn.wwnn2, - tmpvpcidev->scsi.max.max_channel, - tmpvpcidev->scsi.max.max_id, - tmpvpcidev->scsi.max.max_lun, - tmpvpcidev->scsi.max.cmd_per_lun); - } else { - str_pos += scnprintf(vbuf + str_pos, len - str_pos, - "[%d:%d] VNic:%pM num_rcv_bufs:%d mtu:%d", - tmpvpcidev->bus_no, - tmpvpcidev->device_no, - tmpvpcidev->net.mac_addr, - tmpvpcidev->net.num_rcv_bufs, - tmpvpcidev->net.mtu); - } - str_pos += scnprintf(vbuf + str_pos, - len - str_pos, " chanptr:%p\n", - tmpvpcidev->queueinfo.chan); - tmpvpcidev = tmpvpcidev->next; - } - read_unlock_irqrestore(&vpcidev_list_lock, flags); - - str_pos += scnprintf(vbuf + str_pos, len - str_pos, "\n"); - bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos); - kfree(vbuf); - return bytes_read; -} - -/*****************************************************/ -/* Module Init & Exit functions */ -/*****************************************************/ - -static int __init virtpci_mod_init(void) -{ - int ret; - - if (!unisys_spar_platform) - return -ENODEV; - - POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); - - ret = bus_register(&virtpci_bus_type); - /* creates /sys/bus/uisvirtpci which contains devices & - * drivers directory - */ - if (ret) { - POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, ret, - POSTCODE_SEVERITY_ERR); - return ret; - } - bus_device_info_init(&bus_driver_info, "clientbus", "virtpci", - VERSION, NULL); - - /* create a root bus used to parent all the virtpci buses. */ - ret = device_register(&virtpci_rootbus_device); - if (ret) { - bus_unregister(&virtpci_bus_type); - POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, ret, - POSTCODE_SEVERITY_ERR); - return ret; - } - - if (!uisctrl_register_req_handler(2, (void *)&virtpci_ctrlchan_func, - &chipset_driver_info)) { - POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); - device_unregister(&virtpci_rootbus_device); - bus_unregister(&virtpci_bus_type); - return -1; - } - - /* create debugfs directory and info file inside. */ - virtpci_debugfs_dir = debugfs_create_dir("virtpci", NULL); - debugfs_create_file("info", S_IRUSR, virtpci_debugfs_dir, - NULL, &debugfs_info_fops); - POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); - return 0; -} - -static void __exit virtpci_mod_exit(void) -{ - /* unregister the callback function */ - device_unregister(&virtpci_rootbus_device); - bus_unregister(&virtpci_bus_type); - debugfs_remove_recursive(virtpci_debugfs_dir); -} - -module_init(virtpci_mod_init); -module_exit(virtpci_mod_exit); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Usha Srinivasan"); -MODULE_ALIAS("uisvirtpci"); - diff --git a/drivers/staging/unisys/virtpci/virtpci.h b/drivers/staging/unisys/virtpci/virtpci.h deleted file mode 100644 index 9d85f55e8..000000000 --- a/drivers/staging/unisys/virtpci/virtpci.h +++ /dev/null @@ -1,103 +0,0 @@ -/* virtpci.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * Unisys Virtual PCI driver header - */ - -#ifndef __VIRTPCI_H__ -#define __VIRTPCI_H__ - -#include "uisqueue.h" -#include <linux/version.h> -#include <linux/uuid.h> - -#define PCI_DEVICE_ID_VIRTHBA 0xAA00 -#define PCI_DEVICE_ID_VIRTNIC 0xAB00 - -struct scsi_adap_info { - void *scsihost; /* scsi host if this device is a scsi hba */ - struct vhba_wwnn wwnn; /* the world wide node name of vhba */ - struct vhba_config_max max; /* various max specifications used - * to config vhba */ -}; - -struct net_adap_info { - struct net_device *netdev; /* network device if this - * device is a NIC */ - u8 mac_addr[MAX_MACADDR_LEN]; - int num_rcv_bufs; - unsigned mtu; - uuid_le zone_uuid; -}; - -enum virtpci_dev_type { - VIRTHBA_TYPE = 0, - VIRTNIC_TYPE = 1, - VIRTBUS_TYPE = 6, -}; - -struct virtpci_dev { - enum virtpci_dev_type devtype; /* indicates type of the - * virtual pci device */ - struct virtpci_driver *mydriver; /* which driver has allocated - * this device */ - unsigned short vendor; /* vendor id for device */ - unsigned short device; /* device id for device */ - u32 bus_no; /* number of bus on which device exists */ - u32 device_no; /* device's number on the bus */ - struct irq_info intr; /* interrupt info */ - struct device generic_dev; /* generic device */ - union { - struct scsi_adap_info scsi; - struct net_adap_info net; - }; - - struct uisqueue_info queueinfo; /* holds ptr to channel where cmds & - * rsps are queued & retrieved */ - struct virtpci_dev *next; /* points to next virtpci device */ -}; - -struct virtpci_driver { - struct list_head node; - const char *name; /* the name of the driver in sysfs */ - const char *version; - const char *vertag; - const struct pci_device_id *id_table; /* must be non-NULL for probe - * to be called */ - int (*probe)(struct virtpci_dev *dev, - const struct pci_device_id *id); /* device inserted */ - void (*remove)(struct virtpci_dev *dev); /* Device removed (NULL if - * not a hot-plug capable - * driver) */ - int (*suspend)(struct virtpci_dev *dev, - u32 state); /* Device suspended */ - int (*resume)(struct virtpci_dev *dev); /* Device woken up */ - int (*enable_wake)(struct virtpci_dev *dev, - u32 state, int enable); /* Enable wake event */ - struct device_driver core_driver; /* VIRTPCI core fills this in */ -}; - -#define driver_to_virtpci_driver(in_drv) \ - container_of(in_drv, struct virtpci_driver, core_driver) -#define device_to_virtpci_dev(in_dev) \ - container_of(in_dev, struct virtpci_dev, generic_dev) - -int virtpci_register_driver(struct virtpci_driver *); -void virtpci_unregister_driver(struct virtpci_driver *); - -#endif /* __VIRTPCI_H__ */ diff --git a/drivers/staging/unisys/visorbus/Kconfig b/drivers/staging/unisys/visorbus/Kconfig new file mode 100644 index 000000000..9b299ac86 --- /dev/null +++ b/drivers/staging/unisys/visorbus/Kconfig @@ -0,0 +1,9 @@ +# +# Unisys visorbus configuration +# + +config UNISYS_VISORBUS + tristate "Unisys visorbus driver" + depends on UNISYSSPAR + ---help--- + If you say Y here, you will enable the Unisys visorbus driver. diff --git a/drivers/staging/unisys/visorbus/Makefile b/drivers/staging/unisys/visorbus/Makefile new file mode 100644 index 000000000..fa27ee5f3 --- /dev/null +++ b/drivers/staging/unisys/visorbus/Makefile @@ -0,0 +1,13 @@ +# +# Makefile for Unisys visorbus +# + +obj-$(CONFIG_UNISYS_VISORBUS) += visorbus.o + +visorbus-y := visorbus_main.o +visorbus-y += visorchannel.o +visorbus-y += visorchipset.o +visorbus-y += periodic_work.o + +ccflags-y += -Idrivers/staging/unisys/include +ccflags-y += -Idrivers/staging/unisys/visorutil diff --git a/drivers/staging/unisys/common-spar/include/channels/controlvmchannel.h b/drivers/staging/unisys/visorbus/controlvmchannel.h index a66db7968..a50d9cf4b 100644 --- a/drivers/staging/unisys/common-spar/include/channels/controlvmchannel.h +++ b/drivers/staging/unisys/visorbus/controlvmchannel.h @@ -18,59 +18,75 @@ #include <linux/uuid.h> #include "channel.h" -#include "controlframework.h" - -typedef u64 GUEST_PHYSICAL_ADDRESS; - -enum { INVALID_GUEST_FIRMWARE, SAMPLE_GUEST_FIRMWARE, - TIANO32_GUEST_FIRMWARE, TIANO64_GUEST_FIRMWARE -}; /* {2B3C2D10-7EF5-4ad8-B966-3448B7386B3D} */ #define SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID \ UUID_LE(0x2b3c2d10, 0x7ef5, 0x4ad8, \ - 0xb9, 0x66, 0x34, 0x48, 0xb7, 0x38, 0x6b, 0x3d) - -static const uuid_le spar_controlvm_channel_protocol_uuid = - SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; + 0xb9, 0x66, 0x34, 0x48, 0xb7, 0x38, 0x6b, 0x3d) #define ULTRA_CONTROLVM_CHANNEL_PROTOCOL_SIGNATURE \ ULTRA_CHANNEL_PROTOCOL_SIGNATURE -#define CONTROLVM_MESSAGE_MAX 64 +#define CONTROLVM_MESSAGE_MAX 64 /* Must increment this whenever you insert or delete fields within -* this channel struct. Also increment whenever you change the meaning -* of fields within this channel struct so as to break pre-existing -* software. Note that you can usually add fields to the END of the -* channel struct withOUT needing to increment this. */ + * this channel struct. Also increment whenever you change the meaning + * of fields within this channel struct so as to break pre-existing + * software. Note that you can usually add fields to the END of the + * channel struct withOUT needing to increment this. + */ #define ULTRA_CONTROLVM_CHANNEL_PROTOCOL_VERSIONID 1 #define SPAR_CONTROLVM_CHANNEL_OK_CLIENT(ch) \ spar_check_channel_client(ch, \ - spar_controlvm_channel_protocol_uuid, \ + SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID, \ "controlvm", \ sizeof(struct spar_controlvm_channel_protocol), \ ULTRA_CONTROLVM_CHANNEL_PROTOCOL_VERSIONID, \ ULTRA_CONTROLVM_CHANNEL_PROTOCOL_SIGNATURE) -#define MY_DEVICE_INDEX 0 -#define MAX_MACDATA_LEN 8 /* number of bytes for MAC address in config packet */ #define MAX_SERIAL_NUM 32 -#define DISK_ZERO_PUN_NUMBER 1 /* Target ID on the SCSI bus for LUN 0 */ -#define DISK_ZERO_LUN_NUMBER 3 /* Logical Unit Number */ - -/* Defines for various channel queues... */ +/* Defines for various channel queues */ #define CONTROLVM_QUEUE_REQUEST 0 #define CONTROLVM_QUEUE_RESPONSE 1 -#define CONTROLVM_QUEUE_EVENT 2 +#define CONTROLVM_QUEUE_EVENT 2 #define CONTROLVM_QUEUE_ACK 3 -/* Max number of messages stored during IOVM creation to be reused - * after crash */ +/* Max num of messages stored during IOVM creation to be reused after crash */ #define CONTROLVM_CRASHMSG_MAX 2 -/** Ids for commands that may appear in either queue of a ControlVm channel. +struct spar_segment_state { + u16 enabled:1; /* Bit 0: May enter other states */ + u16 active:1; /* Bit 1: Assigned to active partition */ + u16 alive:1; /* Bit 2: Configure message sent to + * service/server */ + u16 revoked:1; /* Bit 3: similar to partition state + * ShuttingDown */ + u16 allocated:1; /* Bit 4: memory (device/port number) + * has been selected by Command */ + u16 known:1; /* Bit 5: has been introduced to the + * service/guest partition */ + u16 ready:1; /* Bit 6: service/Guest partition has + * responded to introduction */ + u16 operating:1; /* Bit 7: resource is configured and + * operating */ + /* Note: don't use high bit unless we need to switch to ushort + * which is non-compliant */ +}; + +static const struct spar_segment_state segment_state_running = { + 1, 1, 1, 0, 1, 1, 1, 1 +}; + +static const struct spar_segment_state segment_state_paused = { + 1, 1, 1, 0, 1, 1, 1, 0 +}; + +static const struct spar_segment_state segment_state_standby = { + 1, 1, 0, 0, 1, 1, 1, 0 +}; + +/* Ids for commands that may appear in either queue of a ControlVm channel. * * Commands that are initiated by the command partition (CP), by an IO or * console service partition (SP), or by a guest partition (GP)are: @@ -84,60 +100,49 @@ static const uuid_le spar_controlvm_channel_protocol_uuid = */ enum controlvm_id { CONTROLVM_INVALID = 0, - /* SWITCH commands required Parameter: SwitchNumber */ - /* BUS commands required Parameter: BusNumber */ - CONTROLVM_BUS_CREATE = 0x101, /* CP --> SP, GP */ - CONTROLVM_BUS_DESTROY = 0x102, /* CP --> SP, GP */ - CONTROLVM_BUS_CONFIGURE = 0x104, /* CP --> SP */ - CONTROLVM_BUS_CHANGESTATE = 0x105, /* CP --> SP, GP */ - CONTROLVM_BUS_CHANGESTATE_EVENT = 0x106, /* SP, GP --> CP */ -/* DEVICE commands required Parameter: BusNumber, DeviceNumber */ - - CONTROLVM_DEVICE_CREATE = 0x201, /* CP --> SP, GP */ - CONTROLVM_DEVICE_DESTROY = 0x202, /* CP --> SP, GP */ - CONTROLVM_DEVICE_CONFIGURE = 0x203, /* CP --> SP */ - CONTROLVM_DEVICE_CHANGESTATE = 0x204, /* CP --> SP, GP */ - CONTROLVM_DEVICE_CHANGESTATE_EVENT = 0x205, /* SP, GP --> CP */ - CONTROLVM_DEVICE_RECONFIGURE = 0x206, /* CP --> Boot */ -/* DISK commands required Parameter: BusNumber, DeviceNumber */ - CONTROLVM_DISK_CREATE = 0x221, /* CP --> SP */ - CONTROLVM_DISK_DESTROY = 0x222, /* CP --> SP */ - CONTROLVM_DISK_CONFIGURE = 0x223, /* CP --> SP */ - CONTROLVM_DISK_CHANGESTATE = 0x224, /* CP --> SP */ + /* SWITCH commands required Parameter: SwitchNumber */ + /* BUS commands required Parameter: BusNumber */ + CONTROLVM_BUS_CREATE = 0x101, /* CP --> SP, GP */ + CONTROLVM_BUS_DESTROY = 0x102, /* CP --> SP, GP */ + CONTROLVM_BUS_CONFIGURE = 0x104, /* CP --> SP */ + CONTROLVM_BUS_CHANGESTATE = 0x105, /* CP --> SP, GP */ + CONTROLVM_BUS_CHANGESTATE_EVENT = 0x106, /* SP, GP --> CP */ +/* DEVICE commands required Parameter: BusNumber, DeviceNumber */ + + CONTROLVM_DEVICE_CREATE = 0x201, /* CP --> SP, GP */ + CONTROLVM_DEVICE_DESTROY = 0x202, /* CP --> SP, GP */ + CONTROLVM_DEVICE_CONFIGURE = 0x203, /* CP --> SP */ + CONTROLVM_DEVICE_CHANGESTATE = 0x204, /* CP --> SP, GP */ + CONTROLVM_DEVICE_CHANGESTATE_EVENT = 0x205, /* SP, GP --> CP */ + CONTROLVM_DEVICE_RECONFIGURE = 0x206, /* CP --> Boot */ /* CHIPSET commands */ - CONTROLVM_CHIPSET_INIT = 0x301, /* CP --> SP, GP */ - CONTROLVM_CHIPSET_STOP = 0x302, /* CP --> SP, GP */ - CONTROLVM_CHIPSET_SHUTDOWN = 0x303, /* CP --> SP */ - CONTROLVM_CHIPSET_READY = 0x304, /* CP --> SP */ - CONTROLVM_CHIPSET_SELFTEST = 0x305, /* CP --> SP */ + CONTROLVM_CHIPSET_INIT = 0x301, /* CP --> SP, GP */ + CONTROLVM_CHIPSET_STOP = 0x302, /* CP --> SP, GP */ + CONTROLVM_CHIPSET_READY = 0x304, /* CP --> SP */ + CONTROLVM_CHIPSET_SELFTEST = 0x305, /* CP --> SP */ }; struct irq_info { - /**< specifies interrupt info. It is used to send interrupts - * for this channel. The peer at the end of this channel - * who has registered an interrupt (using recv fields - * above) will receive the interrupt. Passed as a parameter - * to Issue_VMCALL_IO_QUEUE_TRANSITION, which generates the - * interrupt. Currently this is used by IOPart-SP to wake - * up GP when Data Channel transitions from empty to - * non-empty.*/ - u64 send_irq_handle; - - /**< specifies interrupt handle. It is used to retrieve the + u64 reserved1; + + /* specifies interrupt handle. It is used to retrieve the * corresponding interrupt pin from Monitor; and the * interrupt pin is used to connect to the corresponding - * interrupt. Used by IOPart-GP only. */ + * interrupt. Used by IOPart-GP only. + */ u64 recv_irq_handle; - /**< specifies interrupt vector. It, interrupt pin, and shared are + /* specifies interrupt vector. It, interrupt pin, and shared are * used to connect to the corresponding interrupt. Used by - * IOPart-GP only. */ + * IOPart-GP only. + */ u32 recv_irq_vector; - /**< specifies if the recvInterrupt is shared. It, interrupt pin - * and vector are used to connect to 0 = not shared; 1 = shared. - * the corresponding interrupt. Used by IOPart-GP only. */ + /* specifies if the recvInterrupt is shared. It, interrupt pin + * and vector are used to connect to 0 = not shared; 1 = shared. + * the corresponding interrupt. Used by IOPart-GP only. + */ u8 recv_irq_shared; u8 reserved[3]; /* Natural alignment purposes */ }; @@ -151,20 +156,19 @@ struct pci_id { }; struct efi_spar_indication { - u64 boot_to_fw_ui:1; /* Bit 0: Stop in uefi ui */ - u64 clear_nvram:1; /* Bit 1: Clear NVRAM */ - u64 clear_cmos:1; /* Bit 2: Clear CMOS */ - u64 boot_to_tool:1; /* Bit 3: Run install tool */ + u64 boot_to_fw_ui:1; /* Bit 0: Stop in uefi ui */ + u64 clear_nvram:1; /* Bit 1: Clear NVRAM */ + u64 clear_cmos:1; /* Bit 2: Clear CMOS */ + u64 boot_to_tool:1; /* Bit 3: Run install tool */ /* remaining bits are available */ }; enum ultra_chipset_feature { ULTRA_CHIPSET_FEATURE_REPLY = 0x00000001, ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG = 0x00000002, - ULTRA_CHIPSET_FEATURE_PCIVBUS = 0x00000004 }; -/** This is the common structure that is at the beginning of every +/* This is the common structure that is at the beginning of every * ControlVm message (both commands and responses) in any ControlVm * queue. Commands are easily distinguished from responses by * looking at the flags.response field. @@ -181,26 +185,26 @@ struct controlvm_message_header { u32 completion_status; /* Error status code or result of * message completion */ struct { - u32 failed:1; /**< =1 in a response to * signify + u32 failed:1; /* =1 in a response to * signify * failure */ - u32 response_expected:1; /**< =1 in all messages that expect a - * response (Control ignores this - * bit) */ - u32 server:1; /**< =1 in all bus & device-related + u32 response_expected:1; /* =1 in all messages that expect a + * response (Control ignores this + * bit) */ + u32 server:1; /* =1 in all bus & device-related * messages where the message * receiver is to act as the bus or * device server */ - u32 test_message:1; /**< =1 for testing use only + u32 test_message:1; /* =1 for testing use only * (Control and Command ignore this * bit) */ - u32 partial_completion:1; /**< =1 if there are forthcoming - * responses/acks associated - * with this message */ - u32 preserve:1; /**< =1 this is to let us know to - * preserve channel contents - * (for running guests)*/ - u32 writer_in_diag:1; /**< =1 the DiagWriter is active in the - * Diagnostic Partition*/ + u32 partial_completion:1; /* =1 if there are forthcoming + * responses/acks associated + * with this message */ + u32 preserve:1; /* =1 this is to let us know to + * preserve channel contents + * (for running guests)*/ + u32 writer_in_diag:1; /* =1 the DiagWriter is active in the + * Diagnostic Partition*/ } flags; u32 reserved; /* Natural alignment */ u64 message_handle; /* Identifies the particular message instance, @@ -216,8 +220,8 @@ struct controlvm_message_header { }; struct controlvm_packet_device_create { - u32 bus_no; /* bus # (0..n-1) from the msg receiver's end */ - u32 dev_no; /* bus-relative (0..n-1) device number */ + u32 bus_no; /* bus # (0..n-1) from the msg receiver's end */ + u32 dev_no; /* bus-relative (0..n-1) device number */ u64 channel_addr; /* Guest physical address of the channel, which * can be dereferenced by the receiver of this * ControlVm command */ @@ -228,11 +232,10 @@ struct controlvm_packet_device_create { }; /* for CONTROLVM_DEVICE_CREATE */ struct controlvm_packet_device_configure { - u32 bus_no; /**< bus # (0..n-1) from the msg + u32 bus_no; /* bus # (0..n-1) from the msg * receiver's perspective */ - - /* Control uses header SegmentIndex field to access bus number... */ - u32 dev_no; /**< bus-relative (0..n-1) device number */ + /* Control uses header SegmentIndex field to access bus number... */ + u32 dev_no; /* bus-relative (0..n-1) device number */ } ; /* for CONTROLVM_DEVICE_CONFIGURE */ struct controlvm_message_device_create { @@ -342,77 +345,48 @@ struct controlvm_message { struct controlvm_message_packet cmd; }; -struct device_map { - GUEST_PHYSICAL_ADDRESS device_channel_address; - u64 device_channel_size; - u32 ca_index; - u32 reserved; /* natural alignment */ - u64 reserved2; /* Align structure on 32-byte boundary */ -}; - -struct guest_devices { - struct device_map video_channel; - struct device_map keyboard_channel; - struct device_map network_channel; - struct device_map storage_channel; - struct device_map console_channel; - u32 partition_index; - u32 pad; -}; - struct spar_controlvm_channel_protocol { - struct channel_header header; - GUEST_PHYSICAL_ADDRESS gp_controlvm; /* guest physical address of - * this channel */ - GUEST_PHYSICAL_ADDRESS gp_partition_tables;/* guest physical address of - * partition tables */ - GUEST_PHYSICAL_ADDRESS gp_diag_guest; /* guest physical address of - * diagnostic channel */ - GUEST_PHYSICAL_ADDRESS gp_boot_romdisk;/* guest phys addr of (read - * only) Boot ROM disk */ - GUEST_PHYSICAL_ADDRESS gp_boot_ramdisk;/* guest phys addr of writable - * Boot RAM disk */ - GUEST_PHYSICAL_ADDRESS gp_acpi_table; /* guest phys addr of acpi - * table */ - GUEST_PHYSICAL_ADDRESS gp_control_channel;/* guest phys addr of control - * channel */ - GUEST_PHYSICAL_ADDRESS gp_diag_romdisk;/* guest phys addr of diagnostic - * ROM disk */ - GUEST_PHYSICAL_ADDRESS gp_nvram; /* guest phys addr of NVRAM - * channel */ - u64 request_payload_offset; /* Offset to request payload area */ - u64 event_payload_offset; /* Offset to event payload area */ - u32 request_payload_bytes; /* Bytes available in request payload + struct channel_header header; + u64 gp_controlvm; /* guest phys addr of this channel */ + u64 gp_partition_tables;/* guest phys addr of partition tables */ + u64 gp_diag_guest; /* guest phys addr of diagnostic channel */ + u64 gp_boot_romdisk;/* guest phys addr of (read* only) Boot ROM disk */ + u64 gp_boot_ramdisk;/* guest phys addr of writable Boot RAM disk */ + u64 gp_acpi_table; /* guest phys addr of acpi table */ + u64 gp_control_channel;/* guest phys addr of control channel */ + u64 gp_diag_romdisk;/* guest phys addr of diagnostic ROM disk */ + u64 gp_nvram; /* guest phys addr of NVRAM channel */ + u64 request_payload_offset; /* Offset to request payload area */ + u64 event_payload_offset; /* Offset to event payload area */ + u32 request_payload_bytes; /* Bytes available in request payload * area */ - u32 event_payload_bytes;/* Bytes available in event payload area */ - u32 control_channel_bytes; - u32 nvram_channel_bytes; /* Bytes in PartitionNvram segment */ - u32 message_bytes; /* sizeof(CONTROLVM_MESSAGE) */ - u32 message_count; /* CONTROLVM_MESSAGE_MAX */ - GUEST_PHYSICAL_ADDRESS gp_smbios_table;/* guest phys addr of SMBIOS - * tables */ - GUEST_PHYSICAL_ADDRESS gp_physical_smbios_table;/* guest phys addr of - * SMBIOS table */ - /* ULTRA_MAX_GUESTS_PER_SERVICE */ - struct guest_devices gp_obsolete_guest_devices[16]; - - /* guest physical address of EFI firmware image base */ - GUEST_PHYSICAL_ADDRESS virtual_guest_firmware_image_base; - - /* guest physical address of EFI firmware entry point */ - GUEST_PHYSICAL_ADDRESS virtual_guest_firmware_entry_point; - - /* guest EFI firmware image size */ - u64 virtual_guest_firmware_image_size; - - /* GPA = 1MB where EFI firmware image is copied to */ - GUEST_PHYSICAL_ADDRESS virtual_guest_firmware_boot_base; - GUEST_PHYSICAL_ADDRESS virtual_guest_image_base; - GUEST_PHYSICAL_ADDRESS virtual_guest_image_size; - u64 prototype_control_channel_offset; - GUEST_PHYSICAL_ADDRESS virtual_guest_partition_handle; - - u16 restore_action; /* Restore Action field to restore the guest + u32 event_payload_bytes;/* Bytes available in event payload area */ + u32 control_channel_bytes; + u32 nvram_channel_bytes; /* Bytes in PartitionNvram segment */ + u32 message_bytes; /* sizeof(CONTROLVM_MESSAGE) */ + u32 message_count; /* CONTROLVM_MESSAGE_MAX */ + u64 gp_smbios_table; /* guest phys addr of SMBIOS tables */ + u64 gp_physical_smbios_table; /* guest phys addr of SMBIOS table */ + /* ULTRA_MAX_GUESTS_PER_SERVICE */ + char gp_reserved[2688]; + + /* guest physical address of EFI firmware image base */ + u64 virtual_guest_firmware_image_base; + + /* guest physical address of EFI firmware entry point */ + u64 virtual_guest_firmware_entry_point; + + /* guest EFI firmware image size */ + u64 virtual_guest_firmware_image_size; + + /* GPA = 1MB where EFI firmware image is copied to */ + u64 virtual_guest_firmware_boot_base; + u64 virtual_guest_image_base; + u64 virtual_guest_image_size; + u64 prototype_control_channel_offset; + u64 virtual_guest_partition_handle; + + u16 restore_action; /* Restore Action field to restore the guest * partition */ u16 dump_action; /* For Windows guests it shows if the visordisk * is running in dump mode */ @@ -462,7 +436,7 @@ struct spar_controlvm_channel_protocol { struct controlvm_message saved_crash_msg[CONTROLVM_CRASHMSG_MAX]; }; -/* Offsets for VM channel attributes... */ +/* Offsets for VM channel attributes */ #define VM_CH_REQ_QUEUE_OFFSET \ offsetof(struct spar_controlvm_channel_protocol, request_queue) #define VM_CH_RESP_QUEUE_OFFSET \ diff --git a/drivers/staging/unisys/common-spar/include/controlvmcompletionstatus.h b/drivers/staging/unisys/visorbus/controlvmcompletionstatus.h index f74f5d8c2..f74f5d8c2 100644 --- a/drivers/staging/unisys/common-spar/include/controlvmcompletionstatus.h +++ b/drivers/staging/unisys/visorbus/controlvmcompletionstatus.h diff --git a/drivers/staging/unisys/common-spar/include/iovmcall_gnuc.h b/drivers/staging/unisys/visorbus/iovmcall_gnuc.h index 57dd93e0c..57dd93e0c 100644 --- a/drivers/staging/unisys/common-spar/include/iovmcall_gnuc.h +++ b/drivers/staging/unisys/visorbus/iovmcall_gnuc.h diff --git a/drivers/staging/unisys/visorutil/periodic_work.c b/drivers/staging/unisys/visorbus/periodic_work.c index abbfb4889..5e56088cf 100644 --- a/drivers/staging/unisys/visorutil/periodic_work.c +++ b/drivers/staging/unisys/visorbus/periodic_work.c @@ -18,8 +18,8 @@ /* * Helper functions to schedule periodic work in Linux kernel mode. */ +#include <linux/sched.h> -#include "timskmod.h" #include "periodic_work.h" #define MYDRVNAME "periodic_work" @@ -29,8 +29,8 @@ struct periodic_work { struct delayed_work work; void (*workfunc)(void *); void *workfuncarg; - BOOL is_scheduled; - BOOL want_to_stop; + bool is_scheduled; + bool want_to_stop; ulong jiffy_interval; struct workqueue_struct *workqueue; const char *devnam; @@ -74,64 +74,64 @@ EXPORT_SYMBOL_GPL(visor_periodic_work_destroy); /** Call this from your periodic work worker function to schedule the next * call. - * If this function returns FALSE, there was a failure and the + * If this function returns false, there was a failure and the * periodic work is no longer scheduled */ -BOOL visor_periodic_work_nextperiod(struct periodic_work *pw) +bool visor_periodic_work_nextperiod(struct periodic_work *pw) { - BOOL rc = FALSE; + bool rc = false; write_lock(&pw->lock); if (pw->want_to_stop) { - pw->is_scheduled = FALSE; - pw->want_to_stop = FALSE; - rc = TRUE; /* yes, TRUE; see visor_periodic_work_stop() */ + pw->is_scheduled = false; + pw->want_to_stop = false; + rc = true; /* yes, true; see visor_periodic_work_stop() */ goto unlock; } else if (queue_delayed_work(pw->workqueue, &pw->work, pw->jiffy_interval) < 0) { - pw->is_scheduled = FALSE; - rc = FALSE; + pw->is_scheduled = false; + rc = false; goto unlock; } - rc = TRUE; + rc = true; unlock: write_unlock(&pw->lock); return rc; } EXPORT_SYMBOL_GPL(visor_periodic_work_nextperiod); -/** This function returns TRUE iff new periodic work was actually started. - * If this function returns FALSE, then no work was started +/** This function returns true iff new periodic work was actually started. + * If this function returns false, then no work was started * (either because it was already started, or because of a failure). */ -BOOL visor_periodic_work_start(struct periodic_work *pw) +bool visor_periodic_work_start(struct periodic_work *pw) { - BOOL rc = FALSE; + bool rc = false; write_lock(&pw->lock); if (pw->is_scheduled) { - rc = FALSE; + rc = false; goto unlock; } if (pw->want_to_stop) { - rc = FALSE; + rc = false; goto unlock; } INIT_DELAYED_WORK(&pw->work, &periodic_work_func); if (queue_delayed_work(pw->workqueue, &pw->work, pw->jiffy_interval) < 0) { - rc = FALSE; + rc = false; goto unlock; } - pw->is_scheduled = TRUE; - rc = TRUE; + pw->is_scheduled = true; + rc = true; unlock: write_unlock(&pw->lock); return rc; } EXPORT_SYMBOL_GPL(visor_periodic_work_start); -/** This function returns TRUE iff your call actually stopped the periodic +/** This function returns true iff your call actually stopped the periodic * work. * * -- PAY ATTENTION... this is important -- @@ -165,20 +165,20 @@ EXPORT_SYMBOL_GPL(visor_periodic_work_start); * this deadlock, you will get hung up in an infinite loop saying * "waiting for delayed work...". */ -BOOL visor_periodic_work_stop(struct periodic_work *pw) +bool visor_periodic_work_stop(struct periodic_work *pw) { - BOOL stopped_something = FALSE; + bool stopped_something = false; write_lock(&pw->lock); stopped_something = pw->is_scheduled && (!pw->want_to_stop); while (pw->is_scheduled) { - pw->want_to_stop = TRUE; + pw->want_to_stop = true; if (cancel_delayed_work(&pw->work)) { /* We get here if the delayed work was pending as * delayed work, but was NOT run. */ WARN_ON(!pw->is_scheduled); - pw->is_scheduled = FALSE; + pw->is_scheduled = false; } else { /* If we get here, either the delayed work: * - was run, OR, @@ -192,10 +192,10 @@ BOOL visor_periodic_work_stop(struct periodic_work *pw) } if (pw->is_scheduled) { write_unlock(&pw->lock); - SLEEPJIFFIES(10); + schedule_timeout_interruptible(msecs_to_jiffies(10)); write_lock(&pw->lock); } else { - pw->want_to_stop = FALSE; + pw->want_to_stop = false; } } write_unlock(&pw->lock); diff --git a/drivers/staging/unisys/common-spar/include/channels/vbuschannel.h b/drivers/staging/unisys/visorbus/vbuschannel.h index 2c42ce16e..5ed83a3f1 100644 --- a/drivers/staging/unisys/common-spar/include/channels/vbuschannel.h +++ b/drivers/staging/unisys/visorbus/vbuschannel.h @@ -54,7 +54,7 @@ static const uuid_le spar_vbus_channel_protocol_uuid = #define SPAR_VBUS_CHANNEL_OK_SERVER(actual_bytes) \ (spar_check_channel_server(spar_vbus_channel_protocol_uuid, \ "vbus", \ - sizeof(struct ultra_vbus_channel_protocol),\ + sizeof(struct spar_vbus_channel_protocol),\ actual_bytes)) #pragma pack(push, 1) /* both GCC and VC now allow this pragma */ diff --git a/drivers/staging/unisys/common-spar/include/vbusdeviceinfo.h b/drivers/staging/unisys/visorbus/vbusdeviceinfo.h index 9b6d3e693..9b6d3e693 100644 --- a/drivers/staging/unisys/common-spar/include/vbusdeviceinfo.h +++ b/drivers/staging/unisys/visorbus/vbusdeviceinfo.h diff --git a/drivers/staging/unisys/visorbus/visorbus_main.c b/drivers/staging/unisys/visorbus/visorbus_main.c new file mode 100644 index 000000000..6db47196c --- /dev/null +++ b/drivers/staging/unisys/visorbus/visorbus_main.c @@ -0,0 +1,1518 @@ +/* visorbus_main.c + * + * Copyright � 2010 - 2013 UNISYS CORPORATION + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +#include <linux/uuid.h> + +#include "visorbus.h" +#include "visorbus_private.h" +#include "version.h" +#include "periodic_work.h" +#include "vbuschannel.h" +#include "guestlinuxdebug.h" +#include "vmcallinterface.h" + +#define MYDRVNAME "visorbus" + +/* module parameters */ +static int visorbus_debug; +static int visorbus_forcematch; +static int visorbus_forcenomatch; +static int visorbus_debugref; +#define SERIALLOOPBACKCHANADDR (100 * 1024 * 1024) + +#define CURRENT_FILE_PC VISOR_BUS_PC_visorbus_main_c +#define POLLJIFFIES_TESTWORK 100 +#define POLLJIFFIES_NORMALCHANNEL 10 + +static int visorbus_uevent(struct device *xdev, struct kobj_uevent_env *env); +static int visorbus_match(struct device *xdev, struct device_driver *xdrv); +static void fix_vbus_dev_info(struct visor_device *visordev); + +/* BUS type attributes + * + * define & implement display of bus attributes under + * /sys/bus/visorbus. + * + */ + +static ssize_t version_show(struct bus_type *bus, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", VERSION); +} + +static BUS_ATTR_RO(version); + +static struct attribute *visorbus_bus_attrs[] = { + &bus_attr_version.attr, + NULL, +}; + +static const struct attribute_group visorbus_bus_group = { + .attrs = visorbus_bus_attrs, +}; + +static const struct attribute_group *visorbus_bus_groups[] = { + &visorbus_bus_group, + NULL, +}; + +/** This describes the TYPE of bus. + * (Don't confuse this with an INSTANCE of the bus.) + */ +struct bus_type visorbus_type = { + .name = "visorbus", + .match = visorbus_match, + .uevent = visorbus_uevent, + .bus_groups = visorbus_bus_groups, +}; + +static struct delayed_work periodic_work; + +/* YES, we need 2 workqueues. + * The reason is, workitems on the test queue may need to cancel + * workitems on the other queue. You will be in for trouble if you try to + * do this with workitems queued on the same workqueue. + */ +static struct workqueue_struct *periodic_test_workqueue; +static struct workqueue_struct *periodic_dev_workqueue; +static long long bus_count; /** number of bus instances */ + /** ever-increasing */ + +static void chipset_bus_create(struct visor_device *bus_info); +static void chipset_bus_destroy(struct visor_device *bus_info); +static void chipset_device_create(struct visor_device *dev_info); +static void chipset_device_destroy(struct visor_device *dev_info); +static void chipset_device_pause(struct visor_device *dev_info); +static void chipset_device_resume(struct visor_device *dev_info); + +/** These functions are implemented herein, and are called by the chipset + * driver to notify us about specific events. + */ +static struct visorchipset_busdev_notifiers chipset_notifiers = { + .bus_create = chipset_bus_create, + .bus_destroy = chipset_bus_destroy, + .device_create = chipset_device_create, + .device_destroy = chipset_device_destroy, + .device_pause = chipset_device_pause, + .device_resume = chipset_device_resume, +}; + +/** These functions are implemented in the chipset driver, and we call them + * herein when we want to acknowledge a specific event. + */ +static struct visorchipset_busdev_responders chipset_responders; + +/* filled in with info about parent chipset driver when we register with it */ +static struct ultra_vbus_deviceinfo chipset_driverinfo; +/* filled in with info about this driver, wrt it servicing client busses */ +static struct ultra_vbus_deviceinfo clientbus_driverinfo; + +/** list of visor_device structs, linked via .list_all */ +static LIST_HEAD(list_all_bus_instances); +/** list of visor_device structs, linked via .list_all */ +static LIST_HEAD(list_all_device_instances); + +static int +visorbus_uevent(struct device *xdev, struct kobj_uevent_env *env) +{ + if (add_uevent_var(env, "VERSION=%s", VERSION)) + return -ENOMEM; + return 0; +} + +/* This is called automatically upon adding a visor_device (device_add), or + * adding a visor_driver (visorbus_register_visor_driver), and returns 1 iff the + * provided driver can control the specified device. + */ +static int +visorbus_match(struct device *xdev, struct device_driver *xdrv) +{ + uuid_le channel_type; + int rc = 0; + int i; + struct visor_device *dev; + struct visor_driver *drv; + + dev = to_visor_device(xdev); + drv = to_visor_driver(xdrv); + channel_type = visorchannel_get_uuid(dev->visorchannel); + if (visorbus_forcematch) { + rc = 1; + goto away; + } + if (visorbus_forcenomatch) + goto away; + + if (!drv->channel_types) + goto away; + for (i = 0; + (uuid_le_cmp(drv->channel_types[i].guid, NULL_UUID_LE) != 0) || + (drv->channel_types[i].name); + i++) + if (uuid_le_cmp(drv->channel_types[i].guid, + channel_type) == 0) { + rc = i + 1; + goto away; + } +away: + return rc; +} + +/** This is called when device_unregister() is called for the bus device + * instance, after all other tasks involved with destroying the device + * are complete. + */ +static void +visorbus_release_busdevice(struct device *xdev) +{ + struct visor_device *dev = dev_get_drvdata(xdev); + + dev_set_drvdata(xdev, NULL); + kfree(dev); +} + +/** This is called when device_unregister() is called for each child + * device instance. + */ +static void +visorbus_release_device(struct device *xdev) +{ + struct visor_device *dev = to_visor_device(xdev); + + if (dev->periodic_work) { + visor_periodic_work_destroy(dev->periodic_work); + dev->periodic_work = NULL; + } + if (dev->visorchannel) { + visorchannel_destroy(dev->visorchannel); + dev->visorchannel = NULL; + } + kfree(dev); +} + +/* Implement publishing of device node attributes under: + * + * /sys/bus/visorbus<x>/dev<y>/devmajorminor + * + */ + +#define to_devmajorminor_attr(_attr) \ + container_of(_attr, struct devmajorminor_attribute, attr) +#define to_visor_device_from_kobjdevmajorminor(obj) \ + container_of(obj, struct visor_device, kobjdevmajorminor) + +struct devmajorminor_attribute { + struct attribute attr; + int slot; + ssize_t (*show)(struct visor_device *, int slot, char *buf); + ssize_t (*store)(struct visor_device *, int slot, const char *buf, + size_t count); +}; + +static ssize_t DEVMAJORMINOR_ATTR(struct visor_device *dev, int slot, char *buf) +{ + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + + if (slot < 0 || slot >= maxdevnodes) + return 0; + return snprintf(buf, PAGE_SIZE, "%d:%d\n", + dev->devnodes[slot].major, dev->devnodes[slot].minor); +} + +static ssize_t +devmajorminor_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) +{ + struct devmajorminor_attribute *devmajorminor_attr = + to_devmajorminor_attr(attr); + struct visor_device *dev = to_visor_device_from_kobjdevmajorminor(kobj); + ssize_t ret = 0; + + if (devmajorminor_attr->show) + ret = devmajorminor_attr->show(dev, + devmajorminor_attr->slot, buf); + return ret; +} + +static ssize_t +devmajorminor_attr_store(struct kobject *kobj, + struct attribute *attr, const char *buf, size_t count) +{ + struct devmajorminor_attribute *devmajorminor_attr = + to_devmajorminor_attr(attr); + struct visor_device *dev = to_visor_device_from_kobjdevmajorminor(kobj); + ssize_t ret = 0; + + if (devmajorminor_attr->store) + ret = devmajorminor_attr->store(dev, + devmajorminor_attr->slot, + buf, count); + return ret; +} + +static int register_devmajorminor_attributes(struct visor_device *dev); + +static int +devmajorminor_create_file(struct visor_device *dev, const char *name, + int major, int minor) +{ + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + struct devmajorminor_attribute *myattr = NULL; + int x = -1, rc = 0, slot = -1; + + register_devmajorminor_attributes(dev); + for (slot = 0; slot < maxdevnodes; slot++) + if (!dev->devnodes[slot].attr) + break; + if (slot == maxdevnodes) { + rc = -ENOMEM; + goto away; + } + myattr = kmalloc(sizeof(*myattr), GFP_KERNEL); + if (!myattr) { + rc = -ENOMEM; + goto away; + } + memset(myattr, 0, sizeof(struct devmajorminor_attribute)); + myattr->show = DEVMAJORMINOR_ATTR; + myattr->store = NULL; + myattr->slot = slot; + myattr->attr.name = name; + myattr->attr.mode = S_IRUGO; + dev->devnodes[slot].attr = myattr; + dev->devnodes[slot].major = major; + dev->devnodes[slot].minor = minor; + x = sysfs_create_file(&dev->kobjdevmajorminor, &myattr->attr); + if (x < 0) { + rc = x; + goto away; + } + kobject_uevent(&dev->device.kobj, KOBJ_ONLINE); +away: + if (rc < 0) { + kfree(myattr); + myattr = NULL; + dev->devnodes[slot].attr = NULL; + } + return rc; +} + +static void +devmajorminor_remove_file(struct visor_device *dev, int slot) +{ + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + struct devmajorminor_attribute *myattr = NULL; + + if (slot < 0 || slot >= maxdevnodes) + return; + myattr = (struct devmajorminor_attribute *)(dev->devnodes[slot].attr); + if (!myattr) + return; + sysfs_remove_file(&dev->kobjdevmajorminor, &myattr->attr); + kobject_uevent(&dev->device.kobj, KOBJ_OFFLINE); + dev->devnodes[slot].attr = NULL; + kfree(myattr); +} + +static void +devmajorminor_remove_all_files(struct visor_device *dev) +{ + int i = 0; + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + + for (i = 0; i < maxdevnodes; i++) + devmajorminor_remove_file(dev, i); +} + +static const struct sysfs_ops devmajorminor_sysfs_ops = { + .show = devmajorminor_attr_show, + .store = devmajorminor_attr_store, +}; + +static struct kobj_type devmajorminor_kobj_type = { + .sysfs_ops = &devmajorminor_sysfs_ops +}; + +static int +register_devmajorminor_attributes(struct visor_device *dev) +{ + int rc = 0, x = 0; + + if (dev->kobjdevmajorminor.parent) + goto away; /* already registered */ + x = kobject_init_and_add(&dev->kobjdevmajorminor, + &devmajorminor_kobj_type, &dev->device.kobj, + "devmajorminor"); + if (x < 0) { + rc = x; + goto away; + } + + kobject_uevent(&dev->kobjdevmajorminor, KOBJ_ADD); + +away: + return rc; +} + +static void +unregister_devmajorminor_attributes(struct visor_device *dev) +{ + if (!dev->kobjdevmajorminor.parent) + return; /* already unregistered */ + devmajorminor_remove_all_files(dev); + + kobject_del(&dev->kobjdevmajorminor); + kobject_put(&dev->kobjdevmajorminor); + dev->kobjdevmajorminor.parent = NULL; +} + +/* begin implementation of specific channel attributes to appear under +* /sys/bus/visorbus<x>/dev<y>/channel +*/ +static ssize_t physaddr_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct visor_device *vdev = to_visor_device(dev); + + if (!vdev->visorchannel) + return 0; + return snprintf(buf, PAGE_SIZE, "0x%Lx\n", + visorchannel_get_physaddr(vdev->visorchannel)); +} + +static ssize_t nbytes_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct visor_device *vdev = to_visor_device(dev); + + if (!vdev->visorchannel) + return 0; + return snprintf(buf, PAGE_SIZE, "0x%lx\n", + visorchannel_get_nbytes(vdev->visorchannel)); +} + +static ssize_t clientpartition_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct visor_device *vdev = to_visor_device(dev); + + if (!vdev->visorchannel) + return 0; + return snprintf(buf, PAGE_SIZE, "0x%Lx\n", + visorchannel_get_clientpartition(vdev->visorchannel)); +} + +static ssize_t typeguid_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct visor_device *vdev = to_visor_device(dev); + char s[99]; + + if (!vdev->visorchannel) + return 0; + return snprintf(buf, PAGE_SIZE, "%s\n", + visorchannel_id(vdev->visorchannel, s)); +} + +static ssize_t zoneguid_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct visor_device *vdev = to_visor_device(dev); + char s[99]; + + if (!vdev->visorchannel) + return 0; + return snprintf(buf, PAGE_SIZE, "%s\n", + visorchannel_zoneid(vdev->visorchannel, s)); +} + +static ssize_t typename_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct visor_device *vdev = to_visor_device(dev); + int i = 0; + struct bus_type *xbus = dev->bus; + struct device_driver *xdrv = dev->driver; + struct visor_driver *drv = NULL; + + if (!vdev->visorchannel || !xbus || !xdrv) + return 0; + i = xbus->match(dev, xdrv); + if (!i) + return 0; + drv = to_visor_driver(xdrv); + return snprintf(buf, PAGE_SIZE, "%s\n", drv->channel_types[i - 1].name); +} + +static DEVICE_ATTR_RO(physaddr); +static DEVICE_ATTR_RO(nbytes); +static DEVICE_ATTR_RO(clientpartition); +static DEVICE_ATTR_RO(typeguid); +static DEVICE_ATTR_RO(zoneguid); +static DEVICE_ATTR_RO(typename); + +static struct attribute *channel_attrs[] = { + &dev_attr_physaddr.attr, + &dev_attr_nbytes.attr, + &dev_attr_clientpartition.attr, + &dev_attr_typeguid.attr, + &dev_attr_zoneguid.attr, + &dev_attr_typename.attr, +}; + +static struct attribute_group channel_attr_grp = { + .name = "channel", + .attrs = channel_attrs, +}; + +static const struct attribute_group *visorbus_dev_groups[] = { + &channel_attr_grp, + NULL +}; + +/* end implementation of specific channel attributes */ + +/* BUS instance attributes + * + * define & implement display of bus attributes under + * /sys/bus/visorbus/busses/visorbus<n>. + * + * This is a bit hoaky because the kernel does not yet have the infrastructure + * to separate bus INSTANCE attributes from bus TYPE attributes... + * so we roll our own. See businst.c / businst.h. + * + */ + +static ssize_t partition_handle_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct visor_device *vdev = to_visor_device(dev); + u64 handle = visorchannel_get_clientpartition(vdev->visorchannel); + + return snprintf(buf, PAGE_SIZE, "0x%Lx\n", handle); +} + +static ssize_t partition_guid_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct visor_device *vdev = to_visor_device(dev); + + return snprintf(buf, PAGE_SIZE, "{%pUb}\n", &vdev->partition_uuid); +} + +static ssize_t partition_name_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct visor_device *vdev = to_visor_device(dev); + + return snprintf(buf, PAGE_SIZE, "%s\n", vdev->name); +} + +static ssize_t channel_addr_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct visor_device *vdev = to_visor_device(dev); + u64 addr = visorchannel_get_physaddr(vdev->visorchannel); + + return snprintf(buf, PAGE_SIZE, "0x%Lx\n", addr); +} + +static ssize_t channel_bytes_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct visor_device *vdev = to_visor_device(dev); + u64 nbytes = visorchannel_get_nbytes(vdev->visorchannel); + + return snprintf(buf, PAGE_SIZE, "0x%Lx\n", nbytes); +} + +static ssize_t channel_id_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct visor_device *vdev = to_visor_device(dev); + int len = 0; + + if (vdev->visorchannel) { + visorchannel_id(vdev->visorchannel, buf); + len = strlen(buf); + buf[len++] = '\n'; + } + return len; +} + +static ssize_t client_bus_info_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct visor_device *vdev = to_visor_device(dev); + struct visorchannel *channel = vdev->visorchannel; + + int i, x, remain = PAGE_SIZE; + unsigned long off; + char *p = buf; + u8 *partition_name; + struct ultra_vbus_deviceinfo dev_info; + + partition_name = ""; + if (channel) { + if (vdev->name) + partition_name = vdev->name; + x = snprintf(p, remain, + "Client device / client driver info for %s partition (vbus #%d):\n", + partition_name, vdev->chipset_dev_no); + p += x; + remain -= x; + x = visorchannel_read(channel, + offsetof(struct + spar_vbus_channel_protocol, + chp_info), + &dev_info, sizeof(dev_info)); + if (x >= 0) { + x = vbuschannel_devinfo_to_string(&dev_info, p, + remain, -1); + p += x; + remain -= x; + } + x = visorchannel_read(channel, + offsetof(struct + spar_vbus_channel_protocol, + bus_info), + &dev_info, sizeof(dev_info)); + if (x >= 0) { + x = vbuschannel_devinfo_to_string(&dev_info, p, + remain, -1); + p += x; + remain -= x; + } + off = offsetof(struct spar_vbus_channel_protocol, dev_info); + i = 0; + while (off + sizeof(dev_info) <= + visorchannel_get_nbytes(channel)) { + x = visorchannel_read(channel, + off, &dev_info, sizeof(dev_info)); + if (x >= 0) { + x = vbuschannel_devinfo_to_string + (&dev_info, p, remain, i); + p += x; + remain -= x; + } + off += sizeof(dev_info); + i++; + } + } + return PAGE_SIZE - remain; +} + +static DEVICE_ATTR_RO(partition_handle); +static DEVICE_ATTR_RO(partition_guid); +static DEVICE_ATTR_RO(partition_name); +static DEVICE_ATTR_RO(channel_addr); +static DEVICE_ATTR_RO(channel_bytes); +static DEVICE_ATTR_RO(channel_id); +static DEVICE_ATTR_RO(client_bus_info); + +static struct attribute *dev_attrs[] = { + &dev_attr_partition_handle.attr, + &dev_attr_partition_guid.attr, + &dev_attr_partition_name.attr, + &dev_attr_channel_addr.attr, + &dev_attr_channel_bytes.attr, + &dev_attr_channel_id.attr, + &dev_attr_client_bus_info.attr, + NULL +}; + +static struct attribute_group dev_attr_grp = { + .attrs = dev_attrs, +}; + +static const struct attribute_group *visorbus_groups[] = { + &dev_attr_grp, + NULL +}; + +/* DRIVER attributes + * + * define & implement display of driver attributes under + * /sys/bus/visorbus/drivers/<drivername>. + * + */ + +static ssize_t +DRIVER_ATTR_version(struct device_driver *xdrv, char *buf) +{ + struct visor_driver *drv = to_visor_driver(xdrv); + + return snprintf(buf, PAGE_SIZE, "%s\n", drv->version); +} + +static int +register_driver_attributes(struct visor_driver *drv) +{ + int rc; + struct driver_attribute version = + __ATTR(version, S_IRUGO, DRIVER_ATTR_version, NULL); + drv->version_attr = version; + rc = driver_create_file(&drv->driver, &drv->version_attr); + return rc; +} + +static void +unregister_driver_attributes(struct visor_driver *drv) +{ + driver_remove_file(&drv->driver, &drv->version_attr); +} + +static void +dev_periodic_work(void *xdev) +{ + struct visor_device *dev = (struct visor_device *)xdev; + struct visor_driver *drv = to_visor_driver(dev->device.driver); + + down(&dev->visordriver_callback_lock); + if (drv->channel_interrupt) + drv->channel_interrupt(dev); + up(&dev->visordriver_callback_lock); + if (!visor_periodic_work_nextperiod(dev->periodic_work)) + put_device(&dev->device); +} + +static void +dev_start_periodic_work(struct visor_device *dev) +{ + if (dev->being_removed) + return; + /* now up by at least 2 */ + get_device(&dev->device); + if (!visor_periodic_work_start(dev->periodic_work)) + put_device(&dev->device); +} + +static void +dev_stop_periodic_work(struct visor_device *dev) +{ + if (visor_periodic_work_stop(dev->periodic_work)) + put_device(&dev->device); +} + +/** This is called automatically upon adding a visor_device (device_add), or + * adding a visor_driver (visorbus_register_visor_driver), but only after + * visorbus_match has returned 1 to indicate a successful match between + * driver and device. + */ +static int +visordriver_probe_device(struct device *xdev) +{ + int rc; + struct visor_driver *drv; + struct visor_device *dev; + + drv = to_visor_driver(xdev->driver); + dev = to_visor_device(xdev); + down(&dev->visordriver_callback_lock); + dev->being_removed = false; + /* + * ensure that the dev->being_removed flag is cleared before + * we start the probe + */ + wmb(); + get_device(&dev->device); + if (!drv->probe) { + up(&dev->visordriver_callback_lock); + rc = -1; + goto away; + } + rc = drv->probe(dev); + if (rc < 0) + goto away; + + fix_vbus_dev_info(dev); + up(&dev->visordriver_callback_lock); + rc = 0; +away: + if (rc != 0) + put_device(&dev->device); + return rc; +} + +/** This is called when device_unregister() is called for each child device + * instance, to notify the appropriate visorbus_driver that the device is + * going away, and to decrease the reference count of the device. + */ +static int +visordriver_remove_device(struct device *xdev) +{ + struct visor_device *dev; + struct visor_driver *drv; + + dev = to_visor_device(xdev); + drv = to_visor_driver(xdev->driver); + down(&dev->visordriver_callback_lock); + dev->being_removed = true; + /* + * ensure that the dev->being_removed flag is set before we start the + * actual removal + */ + wmb(); + if (drv) { + if (drv->remove) + drv->remove(dev); + } + up(&dev->visordriver_callback_lock); + dev_stop_periodic_work(dev); + devmajorminor_remove_all_files(dev); + + put_device(&dev->device); + + return 0; +} + +/** A particular type of visor driver calls this function to register + * the driver. The caller MUST fill in the following fields within the + * #drv structure: + * name, version, owner, channel_types, probe, remove + * + * Here's how the whole Linux bus / driver / device model works. + * + * At system start-up, the visorbus kernel module is loaded, which registers + * visorbus_type as a bus type, using bus_register(). + * + * All kernel modules that support particular device types on a + * visorbus bus are loaded. Each of these kernel modules calls + * visorbus_register_visor_driver() in their init functions, passing a + * visor_driver struct. visorbus_register_visor_driver() in turn calls + * register_driver(&visor_driver.driver). This .driver member is + * initialized with generic methods (like probe), whose sole responsibility + * is to act as a broker for the real methods, which are within the + * visor_driver struct. (This is the way the subclass behavior is + * implemented, since visor_driver is essentially a subclass of the + * generic driver.) Whenever a driver_register() happens, core bus code in + * the kernel does (see device_attach() in drivers/base/dd.c): + * + * for each dev associated with the bus (the bus that driver is on) that + * does not yet have a driver + * if bus.match(dev,newdriver) == yes_matched ** .match specified + * ** during bus_register(). + * newdriver.probe(dev) ** for visor drivers, this will call + * ** the generic driver.probe implemented in visorbus.c, + * ** which in turn calls the probe specified within the + * ** struct visor_driver (which was specified by the + * ** actual device driver as part of + * ** visorbus_register_visor_driver()). + * + * The above dance also happens when a new device appears. + * So the question is, how are devices created within the system? + * Basically, just call device_add(dev). See pci_bus_add_devices(). + * pci_scan_device() shows an example of how to build a device struct. It + * returns the newly-created struct to pci_scan_single_device(), who adds it + * to the list of devices at PCIBUS.devices. That list of devices is what + * is traversed by pci_bus_add_devices(). + * + */ +int visorbus_register_visor_driver(struct visor_driver *drv) +{ + int rc = 0; + + drv->driver.name = drv->name; + drv->driver.bus = &visorbus_type; + drv->driver.probe = visordriver_probe_device; + drv->driver.remove = visordriver_remove_device; + drv->driver.owner = drv->owner; + + /* driver_register does this: + * bus_add_driver(drv) + * ->if (drv.bus) ** (bus_type) ** + * driver_attach(drv) + * for each dev with bus type of drv.bus + * if (!dev.drv) ** no driver assigned yet ** + * if (bus.match(dev,drv)) [visorbus_match] + * dev.drv = drv + * if (!drv.probe(dev)) [visordriver_probe_device] + * dev.drv = NULL + */ + + rc = driver_register(&drv->driver); + if (rc < 0) + return rc; + rc = register_driver_attributes(drv); + return rc; +} +EXPORT_SYMBOL_GPL(visorbus_register_visor_driver); + +/** A particular type of visor driver calls this function to unregister + * the driver, i.e., within its module_exit function. + */ +void +visorbus_unregister_visor_driver(struct visor_driver *drv) +{ + unregister_driver_attributes(drv); + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL_GPL(visorbus_unregister_visor_driver); + +int +visorbus_read_channel(struct visor_device *dev, unsigned long offset, + void *dest, unsigned long nbytes) +{ + return visorchannel_read(dev->visorchannel, offset, dest, nbytes); +} +EXPORT_SYMBOL_GPL(visorbus_read_channel); + +int +visorbus_write_channel(struct visor_device *dev, unsigned long offset, + void *src, unsigned long nbytes) +{ + return visorchannel_write(dev->visorchannel, offset, src, nbytes); +} +EXPORT_SYMBOL_GPL(visorbus_write_channel); + +int +visorbus_clear_channel(struct visor_device *dev, unsigned long offset, u8 ch, + unsigned long nbytes) +{ + return visorchannel_clear(dev->visorchannel, offset, ch, nbytes); +} +EXPORT_SYMBOL_GPL(visorbus_clear_channel); + +int +visorbus_registerdevnode(struct visor_device *dev, + const char *name, int major, int minor) +{ + return devmajorminor_create_file(dev, name, major, minor); +} +EXPORT_SYMBOL_GPL(visorbus_registerdevnode); + +/** We don't really have a real interrupt, so for now we just call the + * interrupt function periodically... + */ +void +visorbus_enable_channel_interrupts(struct visor_device *dev) +{ + dev_start_periodic_work(dev); +} +EXPORT_SYMBOL_GPL(visorbus_enable_channel_interrupts); + +void +visorbus_disable_channel_interrupts(struct visor_device *dev) +{ + dev_stop_periodic_work(dev); +} +EXPORT_SYMBOL_GPL(visorbus_disable_channel_interrupts); + +/** This is how everything starts from the device end. + * This function is called when a channel first appears via a ControlVM + * message. In response, this function allocates a visor_device to + * correspond to the new channel, and attempts to connect it the appropriate + * driver. If the appropriate driver is found, the visor_driver.probe() + * function for that driver will be called, and will be passed the new + * visor_device that we just created. + * + * It's ok if the appropriate driver is not yet loaded, because in that case + * the new device struct will just stick around in the bus' list of devices. + * When the appropriate driver calls visorbus_register_visor_driver(), the + * visor_driver.probe() for the new driver will be called with the new + * device. + */ +static int +create_visor_device(struct visor_device *dev) +{ + int rc = -1; + u32 chipset_bus_no = dev->chipset_bus_no; + u32 chipset_dev_no = dev->chipset_dev_no; + + POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, chipset_dev_no, chipset_bus_no, + POSTCODE_SEVERITY_INFO); + + sema_init(&dev->visordriver_callback_lock, 1); /* unlocked */ + dev->device.bus = &visorbus_type; + dev->device.groups = visorbus_dev_groups; + device_initialize(&dev->device); + dev->device.release = visorbus_release_device; + /* keep a reference just for us (now 2) */ + get_device(&dev->device); + dev->periodic_work = + visor_periodic_work_create(POLLJIFFIES_NORMALCHANNEL, + periodic_dev_workqueue, + dev_periodic_work, + dev, dev_name(&dev->device)); + if (!dev->periodic_work) { + POSTCODE_LINUX_3(DEVICE_CREATE_FAILURE_PC, chipset_dev_no, + DIAG_SEVERITY_ERR); + goto away; + } + + /* bus_id must be a unique name with respect to this bus TYPE + * (NOT bus instance). That's why we need to include the bus + * number within the name. + */ + dev_set_name(&dev->device, "vbus%u:dev%u", + chipset_bus_no, chipset_dev_no); + + /* device_add does this: + * bus_add_device(dev) + * ->device_attach(dev) + * ->for each driver drv registered on the bus that dev is on + * if (dev.drv) ** device already has a driver ** + * ** not sure we could ever get here... ** + * else + * if (bus.match(dev,drv)) [visorbus_match] + * dev.drv = drv + * if (!drv.probe(dev)) [visordriver_probe_device] + * dev.drv = NULL + * + * Note that device_add does NOT fail if no driver failed to + * claim the device. The device will be linked onto + * bus_type.klist_devices regardless (use bus_for_each_dev). + */ + rc = device_add(&dev->device); + if (rc < 0) { + POSTCODE_LINUX_3(DEVICE_ADD_PC, chipset_bus_no, + DIAG_SEVERITY_ERR); + goto away; + } + + rc = register_devmajorminor_attributes(dev); + if (rc < 0) { + POSTCODE_LINUX_3(DEVICE_REGISTER_FAILURE_PC, chipset_dev_no, + DIAG_SEVERITY_ERR); + goto away_register; + } + + list_add_tail(&dev->list_all, &list_all_device_instances); + return 0; + +away_register: + device_unregister(&dev->device); +away: + put_device(&dev->device); + return rc; +} + +static void +remove_visor_device(struct visor_device *dev) +{ + list_del(&dev->list_all); + unregister_devmajorminor_attributes(dev); + put_device(&dev->device); + device_unregister(&dev->device); +} + +static int +get_vbus_header_info(struct visorchannel *chan, + struct spar_vbus_headerinfo *hdr_info) +{ + int rc = -1; + + if (!SPAR_VBUS_CHANNEL_OK_CLIENT(visorchannel_get_header(chan))) + goto away; + if (visorchannel_read(chan, sizeof(struct channel_header), hdr_info, + sizeof(*hdr_info)) < 0) { + goto away; + } + if (hdr_info->struct_bytes < sizeof(struct spar_vbus_headerinfo)) + goto away; + if (hdr_info->device_info_struct_bytes < + sizeof(struct ultra_vbus_deviceinfo)) { + goto away; + } + rc = 0; +away: + return rc; +} + +/* Write the contents of <info> to the struct + * spar_vbus_channel_protocol.chp_info. */ + +static int +write_vbus_chp_info(struct visorchannel *chan, + struct spar_vbus_headerinfo *hdr_info, + struct ultra_vbus_deviceinfo *info) +{ + int off = sizeof(struct channel_header) + hdr_info->chp_info_offset; + + if (hdr_info->chp_info_offset == 0) + return -1; + + if (visorchannel_write(chan, off, info, sizeof(*info)) < 0) + return -1; + return 0; +} + +/* Write the contents of <info> to the struct + * spar_vbus_channel_protocol.bus_info. */ + +static int +write_vbus_bus_info(struct visorchannel *chan, + struct spar_vbus_headerinfo *hdr_info, + struct ultra_vbus_deviceinfo *info) +{ + int off = sizeof(struct channel_header) + hdr_info->bus_info_offset; + + if (hdr_info->bus_info_offset == 0) + return -1; + + if (visorchannel_write(chan, off, info, sizeof(*info)) < 0) + return -1; + return 0; +} + +/* Write the contents of <info> to the + * struct spar_vbus_channel_protocol.dev_info[<devix>]. + */ +static int +write_vbus_dev_info(struct visorchannel *chan, + struct spar_vbus_headerinfo *hdr_info, + struct ultra_vbus_deviceinfo *info, int devix) +{ + int off = + (sizeof(struct channel_header) + hdr_info->dev_info_offset) + + (hdr_info->device_info_struct_bytes * devix); + + if (hdr_info->dev_info_offset == 0) + return -1; + + if (visorchannel_write(chan, off, info, sizeof(*info)) < 0) + return -1; + return 0; +} + +/* For a child device just created on a client bus, fill in + * information about the driver that is controlling this device into + * the the appropriate slot within the vbus channel of the bus + * instance. + */ +static void +fix_vbus_dev_info(struct visor_device *visordev) +{ + int i; + struct visor_device *bdev; + struct visor_driver *visordrv; + int bus_no = visordev->chipset_bus_no; + int dev_no = visordev->chipset_dev_no; + struct ultra_vbus_deviceinfo dev_info; + const char *chan_type_name = NULL; + struct spar_vbus_headerinfo *hdr_info; + + if (!visordev->device.driver) + return; + + hdr_info = (struct spar_vbus_headerinfo *)visordev->vbus_hdr_info; + if (!hdr_info) + return; + + bdev = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); + if (!bdev) + return; + + visordrv = to_visor_driver(visordev->device.driver); + + /* Within the list of device types (by GUID) that the driver + * says it supports, find out which one of those types matches + * the type of this device, so that we can include the device + * type name + */ + for (i = 0; visordrv->channel_types[i].name; i++) { + if (memcmp(&visordrv->channel_types[i].guid, + &visordev->channel_type_guid, + sizeof(visordrv->channel_types[i].guid)) == 0) { + chan_type_name = visordrv->channel_types[i].name; + break; + } + } + + bus_device_info_init(&dev_info, chan_type_name, + visordrv->name, visordrv->version, + visordrv->vertag); + write_vbus_dev_info(bdev->visorchannel, hdr_info, &dev_info, dev_no); + + /* Re-write bus+chipset info, because it is possible that this + * was previously written by our evil counterpart, virtpci. + */ + write_vbus_chp_info(bdev->visorchannel, hdr_info, &chipset_driverinfo); + write_vbus_bus_info(bdev->visorchannel, hdr_info, + &clientbus_driverinfo); +} + +/** Create a device instance for the visor bus itself. + */ +static int +create_bus_instance(struct visor_device *dev) +{ + int rc; + int id = dev->chipset_bus_no; + struct spar_vbus_headerinfo *hdr_info; + + POSTCODE_LINUX_2(BUS_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); + + hdr_info = kzalloc(sizeof(*hdr_info), GFP_KERNEL); + if (!hdr_info) { + rc = -1; + goto away; + } + + dev_set_name(&dev->device, "visorbus%d", id); + dev->device.bus = &visorbus_type; + dev->device.groups = visorbus_groups; + dev->device.release = visorbus_release_busdevice; + + if (device_register(&dev->device) < 0) { + POSTCODE_LINUX_3(DEVICE_CREATE_FAILURE_PC, id, + POSTCODE_SEVERITY_ERR); + rc = -1; + goto away_mem; + } + + if (get_vbus_header_info(dev->visorchannel, hdr_info) >= 0) { + dev->vbus_hdr_info = (void *)hdr_info; + write_vbus_chp_info(dev->visorchannel, hdr_info, + &chipset_driverinfo); + write_vbus_bus_info(dev->visorchannel, hdr_info, + &clientbus_driverinfo); + } else { + kfree(hdr_info); + } + bus_count++; + list_add_tail(&dev->list_all, &list_all_bus_instances); + dev_set_drvdata(&dev->device, dev); + return 0; + +away_mem: + kfree(hdr_info); +away: + return rc; +} + +/** Remove a device instance for the visor bus itself. + */ +static void +remove_bus_instance(struct visor_device *dev) +{ + /* Note that this will result in the release method for + * dev->dev being called, which will call + * visorbus_release_busdevice(). This has something to do with + * the put_device() done in device_unregister(), but I have never + * successfully been able to trace thru the code to see where/how + * release() gets called. But I know it does. + */ + bus_count--; + if (dev->visorchannel) { + visorchannel_destroy(dev->visorchannel); + dev->visorchannel = NULL; + } + kfree(dev->vbus_hdr_info); + list_del(&dev->list_all); + device_unregister(&dev->device); +} + +/** Create and register the one-and-only one instance of + * the visor bus type (visorbus_type). + */ +static int +create_bus_type(void) +{ + int rc = 0; + + rc = bus_register(&visorbus_type); + return rc; +} + +/** Remove the one-and-only one instance of the visor bus type (visorbus_type). + */ +static void +remove_bus_type(void) +{ + bus_unregister(&visorbus_type); +} + +/** Remove all child visor bus device instances. + */ +static void +remove_all_visor_devices(void) +{ + struct list_head *listentry, *listtmp; + + list_for_each_safe(listentry, listtmp, &list_all_device_instances) { + struct visor_device *dev = list_entry(listentry, + struct visor_device, + list_all); + remove_visor_device(dev); + } +} + +static void +chipset_bus_create(struct visor_device *dev) +{ + int rc; + u32 bus_no = dev->chipset_bus_no; + + POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); + rc = create_bus_instance(dev); + POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); + + if (rc < 0) + POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, + POSTCODE_SEVERITY_ERR); + else + POSTCODE_LINUX_3(CHIPSET_INIT_SUCCESS_PC, bus_no, + POSTCODE_SEVERITY_INFO); + + if (chipset_responders.bus_create) + (*chipset_responders.bus_create) (dev, rc); +} + +static void +chipset_bus_destroy(struct visor_device *dev) +{ + remove_bus_instance(dev); + if (chipset_responders.bus_destroy) + (*chipset_responders.bus_destroy)(dev, 0); +} + +static void +chipset_device_create(struct visor_device *dev_info) +{ + int rc = -1; + u32 bus_no = dev_info->chipset_bus_no; + u32 dev_no = dev_info->chipset_dev_no; + + POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, + POSTCODE_SEVERITY_INFO); + + rc = create_visor_device(dev_info); + if (chipset_responders.device_create) + chipset_responders.device_create(dev_info, rc); + + if (rc < 0) + POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, + POSTCODE_SEVERITY_ERR); + else + POSTCODE_LINUX_4(DEVICE_CREATE_SUCCESS_PC, dev_no, bus_no, + POSTCODE_SEVERITY_INFO); +} + +static void +chipset_device_destroy(struct visor_device *dev_info) +{ + remove_visor_device(dev_info); + + if (chipset_responders.device_destroy) + (*chipset_responders.device_destroy) (dev_info, 0); +} + +/* This is the callback function specified for a function driver, to + * be called when a pending "pause device" operation has been + * completed. + */ +static void +pause_state_change_complete(struct visor_device *dev, int status) +{ + if (!dev->pausing) + return; + + dev->pausing = false; + if (!chipset_responders.device_pause) /* this can never happen! */ + return; + + /* Notify the chipset driver that the pause is complete, which + * will presumably want to send some sort of response to the + * initiator. */ + (*chipset_responders.device_pause) (dev, status); +} + +/* This is the callback function specified for a function driver, to + * be called when a pending "resume device" operation has been + * completed. + */ +static void +resume_state_change_complete(struct visor_device *dev, int status) +{ + if (!dev->resuming) + return; + + dev->resuming = false; + if (!chipset_responders.device_resume) /* this can never happen! */ + return; + + /* Notify the chipset driver that the resume is complete, + * which will presumably want to send some sort of response to + * the initiator. */ + (*chipset_responders.device_resume) (dev, status); +} + +/* Tell the subordinate function driver for a specific device to pause + * or resume that device. Result is returned asynchronously via a + * callback function. + */ +static void +initiate_chipset_device_pause_resume(struct visor_device *dev, bool is_pause) +{ + int rc = -1, x; + struct visor_driver *drv = NULL; + void (*notify_func)(struct visor_device *dev, int response) = NULL; + + if (is_pause) + notify_func = chipset_responders.device_pause; + else + notify_func = chipset_responders.device_resume; + if (!notify_func) + goto away; + + drv = to_visor_driver(dev->device.driver); + if (!drv) + goto away; + + if (dev->pausing || dev->resuming) + goto away; + + /* Note that even though both drv->pause() and drv->resume + * specify a callback function, it is NOT necessary for us to + * increment our local module usage count. Reason is, there + * is already a linkage dependency between child function + * drivers and visorbus, so it is already IMPOSSIBLE to unload + * visorbus while child function drivers are still running. + */ + if (is_pause) { + if (!drv->pause) + goto away; + + dev->pausing = true; + x = drv->pause(dev, pause_state_change_complete); + } else { + /* This should be done at BUS resume time, but an + * existing problem prevents us from ever getting a bus + * resume... This hack would fail to work should we + * ever have a bus that contains NO devices, since we + * would never even get here in that case. */ + fix_vbus_dev_info(dev); + if (!drv->resume) + goto away; + + dev->resuming = true; + x = drv->resume(dev, resume_state_change_complete); + } + if (x < 0) { + if (is_pause) + dev->pausing = false; + else + dev->resuming = false; + goto away; + } + rc = 0; +away: + if (rc < 0) { + if (notify_func) + (*notify_func)(dev, rc); + } +} + +static void +chipset_device_pause(struct visor_device *dev_info) +{ + initiate_chipset_device_pause_resume(dev_info, true); +} + +static void +chipset_device_resume(struct visor_device *dev_info) +{ + initiate_chipset_device_pause_resume(dev_info, false); +} + +struct channel_size_info { + uuid_le guid; + unsigned long min_size; + unsigned long max_size; +}; + +int +visorbus_init(void) +{ + int rc = 0; + + POSTCODE_LINUX_3(DRIVER_ENTRY_PC, rc, POSTCODE_SEVERITY_INFO); + bus_device_info_init(&clientbus_driverinfo, + "clientbus", "visorbus", + VERSION, NULL); + + rc = create_bus_type(); + if (rc < 0) { + POSTCODE_LINUX_2(BUS_CREATE_ENTRY_PC, DIAG_SEVERITY_ERR); + goto away; + } + + periodic_dev_workqueue = create_singlethread_workqueue("visorbus_dev"); + if (!periodic_dev_workqueue) { + POSTCODE_LINUX_2(CREATE_WORKQUEUE_PC, DIAG_SEVERITY_ERR); + rc = -ENOMEM; + goto away; + } + + /* This enables us to receive notifications when devices appear for + * which this service partition is to be a server for. + */ + visorchipset_register_busdev(&chipset_notifiers, + &chipset_responders, + &chipset_driverinfo); + + rc = 0; + +away: + if (rc) + POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, + POSTCODE_SEVERITY_ERR); + return rc; +} + +void +visorbus_exit(void) +{ + struct list_head *listentry, *listtmp; + + visorchipset_register_busdev(NULL, NULL, NULL); + remove_all_visor_devices(); + + flush_workqueue(periodic_dev_workqueue); /* better not be any work! */ + destroy_workqueue(periodic_dev_workqueue); + periodic_dev_workqueue = NULL; + + if (periodic_test_workqueue) { + cancel_delayed_work(&periodic_work); + flush_workqueue(periodic_test_workqueue); + destroy_workqueue(periodic_test_workqueue); + periodic_test_workqueue = NULL; + } + + list_for_each_safe(listentry, listtmp, &list_all_bus_instances) { + struct visor_device *dev = list_entry(listentry, + struct + visor_device, + list_all); + remove_bus_instance(dev); + } + remove_bus_type(); +} + +module_param_named(debug, visorbus_debug, int, S_IRUGO); +MODULE_PARM_DESC(visorbus_debug, "1 to debug"); + +module_param_named(forcematch, visorbus_forcematch, int, S_IRUGO); +MODULE_PARM_DESC(visorbus_forcematch, + "1 to force a successful dev <--> drv match"); + +module_param_named(forcenomatch, visorbus_forcenomatch, int, S_IRUGO); +MODULE_PARM_DESC(visorbus_forcenomatch, + "1 to force an UNsuccessful dev <--> drv match"); + +module_param_named(debugref, visorbus_debugref, int, S_IRUGO); +MODULE_PARM_DESC(visorbus_debugref, "1 to debug reference counting"); diff --git a/drivers/staging/unisys/visorbus/visorbus_private.h b/drivers/staging/unisys/visorbus/visorbus_private.h new file mode 100644 index 000000000..2f12483e3 --- /dev/null +++ b/drivers/staging/unisys/visorbus/visorbus_private.h @@ -0,0 +1,69 @@ +/* visorchipset.h + * + * Copyright (C) 2010 - 2013 UNISYS CORPORATION + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +#ifndef __VISORCHIPSET_H__ +#define __VISORCHIPSET_H__ + +#include <linux/uuid.h> + +#include "controlvmchannel.h" +#include "vbusdeviceinfo.h" +#include "vbushelper.h" + +/* These functions will be called from within visorchipset when certain + * events happen. (The implementation of these functions is outside of + * visorchipset.) + */ +struct visorchipset_busdev_notifiers { + void (*bus_create)(struct visor_device *bus_info); + void (*bus_destroy)(struct visor_device *bus_info); + void (*device_create)(struct visor_device *bus_info); + void (*device_destroy)(struct visor_device *bus_info); + void (*device_pause)(struct visor_device *bus_info); + void (*device_resume)(struct visor_device *bus_info); +}; + +/* These functions live inside visorchipset, and will be called to indicate + * responses to specific events (by code outside of visorchipset). + * For now, the value for each response is simply either: + * 0 = it worked + * -1 = it failed + */ +struct visorchipset_busdev_responders { + void (*bus_create)(struct visor_device *p, int response); + void (*bus_destroy)(struct visor_device *p, int response); + void (*device_create)(struct visor_device *p, int response); + void (*device_destroy)(struct visor_device *p, int response); + void (*device_pause)(struct visor_device *p, int response); + void (*device_resume)(struct visor_device *p, int response); +}; + +/** Register functions (in the bus driver) to get called by visorchipset + * whenever a bus or device appears for which this guest is to be the + * client for. visorchipset will fill in <responders>, to indicate + * functions the bus driver should call to indicate message responses. + */ +void +visorchipset_register_busdev( + struct visorchipset_busdev_notifiers *notifiers, + struct visorchipset_busdev_responders *responders, + struct ultra_vbus_deviceinfo *driver_info); + +/* visorbus init and exit functions */ +int visorbus_init(void); +void visorbus_exit(void); +#endif diff --git a/drivers/staging/unisys/visorchannel/visorchannel_funcs.c b/drivers/staging/unisys/visorbus/visorchannel.c index 7a9a7242f..20b63496e 100644 --- a/drivers/staging/unisys/visorchannel/visorchannel_funcs.c +++ b/drivers/staging/unisys/visorbus/visorchannel.c @@ -17,23 +17,31 @@ /* * This provides Supervisor channel communication primitives, which are - * independent of the mechanism used to access the channel data. All channel - * data is accessed using the memregion abstraction. (memregion has both - * a CM2 implementation and a direct memory implementation.) + * independent of the mechanism used to access the channel data. */ -#include "globals.h" -#include "visorchannel.h" #include <linux/uuid.h> +#include "version.h" +#include "visorbus.h" +#include "controlvmchannel.h" + #define MYDRVNAME "visorchannel" +#define SPAR_CONSOLEVIDEO_CHANNEL_PROTOCOL_GUID \ + UUID_LE(0x3cd6e705, 0xd6a2, 0x4aa5, \ + 0xad, 0x5c, 0x7b, 0x8, 0x88, 0x9d, 0xff, 0xe2) +static const uuid_le spar_video_guid = SPAR_CONSOLEVIDEO_CHANNEL_PROTOCOL_GUID; + struct visorchannel { - struct memregion *memregion; /* from visor_memregion_create() */ + u64 physaddr; + ulong nbytes; + void __iomem *mapped; + bool requested; struct channel_header chan_hdr; uuid_le guid; ulong size; - BOOL needs_lock; /* channel creator knows if more than one + bool needs_lock; /* channel creator knows if more than one * thread will be inserting or removing */ spinlock_t insert_lock; /* protect head writes in chan_hdr */ spinlock_t remove_lock; /* protect tail writes in chan_hdr */ @@ -44,126 +52,133 @@ struct visorchannel { struct signal_queue_header event_queue; struct signal_queue_header ack_queue; } safe_uis_queue; + uuid_le type; + uuid_le inst; }; /* Creates the struct visorchannel abstraction for a data area in memory, * but does NOT modify this data area. */ static struct visorchannel * -visorchannel_create_guts(HOSTADDRESS physaddr, ulong channel_bytes, - struct visorchannel *parent, ulong off, uuid_le guid, - BOOL needs_lock) +visorchannel_create_guts(u64 physaddr, unsigned long channel_bytes, + gfp_t gfp, unsigned long off, + uuid_le guid, bool needs_lock) { - struct visorchannel *p = NULL; - void *rc = NULL; + struct visorchannel *channel; + int err; + size_t size = sizeof(struct channel_header); + + if (physaddr == 0) + return NULL; - p = kmalloc(sizeof(*p), GFP_KERNEL|__GFP_NORETRY); - if (!p) { - rc = NULL; + channel = kzalloc(sizeof(*channel), gfp); + if (!channel) goto cleanup; + + channel->needs_lock = needs_lock; + spin_lock_init(&channel->insert_lock); + spin_lock_init(&channel->remove_lock); + + /* Video driver constains the efi framebuffer so it will get a + * conflict resource when requesting its full mem region. Since + * we are only using the efi framebuffer for video we can ignore + * this. Remember that we haven't requested it so we don't try to + * release later on. + */ + channel->requested = request_mem_region(physaddr, size, MYDRVNAME); + if (!channel->requested) { + if (uuid_le_cmp(guid, spar_video_guid)) { + /* Not the video channel we care about this */ + goto cleanup; + } } - p->memregion = NULL; - p->needs_lock = needs_lock; - spin_lock_init(&p->insert_lock); - spin_lock_init(&p->remove_lock); - - /* prepare chan_hdr (abstraction to read/write channel memory) */ - if (!parent) - p->memregion = - visor_memregion_create(physaddr, - sizeof(struct channel_header)); - else - p->memregion = - visor_memregion_create_overlapped(parent->memregion, - off, sizeof(struct channel_header)); - if (!p->memregion) { - rc = NULL; + + channel->mapped = ioremap_cache(physaddr, size); + if (!channel->mapped) { + release_mem_region(physaddr, size); goto cleanup; } - if (visor_memregion_read(p->memregion, 0, &p->chan_hdr, - sizeof(struct channel_header)) < 0) { - rc = NULL; + + channel->physaddr = physaddr; + channel->nbytes = size; + + err = visorchannel_read(channel, 0, &channel->chan_hdr, + sizeof(struct channel_header)); + if (err) goto cleanup; - } + + /* we had better be a CLIENT of this channel */ if (channel_bytes == 0) - /* we had better be a CLIENT of this channel */ - channel_bytes = (ulong)p->chan_hdr.size; + channel_bytes = (ulong)channel->chan_hdr.size; if (uuid_le_cmp(guid, NULL_UUID_LE) == 0) - /* we had better be a CLIENT of this channel */ - guid = p->chan_hdr.chtype; - if (visor_memregion_resize(p->memregion, channel_bytes) < 0) { - rc = NULL; + guid = channel->chan_hdr.chtype; + + iounmap(channel->mapped); + if (channel->requested) + release_mem_region(channel->physaddr, channel->nbytes); + channel->mapped = NULL; + channel->requested = request_mem_region(channel->physaddr, + channel_bytes, MYDRVNAME); + if (!channel->requested) { + if (uuid_le_cmp(guid, spar_video_guid)) { + /* Different we care about this */ + goto cleanup; + } + } + + channel->mapped = ioremap_cache(channel->physaddr, channel_bytes); + if (!channel->mapped) { + release_mem_region(channel->physaddr, channel_bytes); goto cleanup; } - p->size = channel_bytes; - p->guid = guid; - rc = p; -cleanup: + channel->nbytes = channel_bytes; - if (!rc) { - if (!p) { - visorchannel_destroy(p); - p = NULL; - } - } - return rc; + channel->size = channel_bytes; + channel->guid = guid; + return channel; + +cleanup: + visorchannel_destroy(channel); + return NULL; } struct visorchannel * -visorchannel_create(HOSTADDRESS physaddr, ulong channel_bytes, uuid_le guid) +visorchannel_create(u64 physaddr, unsigned long channel_bytes, + gfp_t gfp, uuid_le guid) { - return visorchannel_create_guts(physaddr, channel_bytes, NULL, 0, guid, - FALSE); + return visorchannel_create_guts(physaddr, channel_bytes, gfp, 0, guid, + false); } EXPORT_SYMBOL_GPL(visorchannel_create); struct visorchannel * -visorchannel_create_with_lock(HOSTADDRESS physaddr, ulong channel_bytes, - uuid_le guid) +visorchannel_create_with_lock(u64 physaddr, unsigned long channel_bytes, + gfp_t gfp, uuid_le guid) { - return visorchannel_create_guts(physaddr, channel_bytes, NULL, 0, guid, - TRUE); + return visorchannel_create_guts(physaddr, channel_bytes, gfp, 0, guid, + true); } EXPORT_SYMBOL_GPL(visorchannel_create_with_lock); -struct visorchannel * -visorchannel_create_overlapped(ulong channel_bytes, - struct visorchannel *parent, ulong off, - uuid_le guid) -{ - return visorchannel_create_guts(0, channel_bytes, parent, off, guid, - FALSE); -} -EXPORT_SYMBOL_GPL(visorchannel_create_overlapped); - -struct visorchannel * -visorchannel_create_overlapped_with_lock(ulong channel_bytes, - struct visorchannel *parent, ulong off, - uuid_le guid) -{ - return visorchannel_create_guts(0, channel_bytes, parent, off, guid, - TRUE); -} -EXPORT_SYMBOL_GPL(visorchannel_create_overlapped_with_lock); - void visorchannel_destroy(struct visorchannel *channel) { if (!channel) return; - if (channel->memregion) { - visor_memregion_destroy(channel->memregion); - channel->memregion = NULL; + if (channel->mapped) { + iounmap(channel->mapped); + if (channel->requested) + release_mem_region(channel->physaddr, channel->nbytes); } kfree(channel); } EXPORT_SYMBOL_GPL(visorchannel_destroy); -HOSTADDRESS +u64 visorchannel_get_physaddr(struct visorchannel *channel) { - return visor_memregion_get_physaddr(channel->memregion); + return channel->physaddr; } EXPORT_SYMBOL_GPL(visorchannel_get_physaddr); @@ -196,13 +211,22 @@ visorchannel_zoneid(struct visorchannel *channel, char *s) } EXPORT_SYMBOL_GPL(visorchannel_zoneid); -HOSTADDRESS +u64 visorchannel_get_clientpartition(struct visorchannel *channel) { return channel->chan_hdr.partition_handle; } EXPORT_SYMBOL_GPL(visorchannel_get_clientpartition); +int +visorchannel_set_clientpartition(struct visorchannel *channel, + u64 partition_handle) +{ + channel->chan_hdr.partition_handle = partition_handle; + return 0; +} +EXPORT_SYMBOL_GPL(visorchannel_set_clientpartition); + uuid_le visorchannel_get_uuid(struct visorchannel *channel) { @@ -210,25 +234,16 @@ visorchannel_get_uuid(struct visorchannel *channel) } EXPORT_SYMBOL_GPL(visorchannel_get_uuid); -struct memregion * -visorchannel_get_memregion(struct visorchannel *channel) -{ - return channel->memregion; -} -EXPORT_SYMBOL_GPL(visorchannel_get_memregion); - int visorchannel_read(struct visorchannel *channel, ulong offset, void *local, ulong nbytes) { - int rc = visor_memregion_read(channel->memregion, offset, - local, nbytes); - if ((rc >= 0) && (offset == 0) && - (nbytes >= sizeof(struct channel_header))) { - memcpy(&channel->chan_hdr, local, - sizeof(struct channel_header)); - } - return rc; + if (offset + nbytes > channel->nbytes) + return -EIO; + + memcpy_fromio(local, channel->mapped + offset, nbytes); + + return 0; } EXPORT_SYMBOL_GPL(visorchannel_read); @@ -236,10 +251,20 @@ int visorchannel_write(struct visorchannel *channel, ulong offset, void *local, ulong nbytes) { - if (offset == 0 && nbytes >= sizeof(struct channel_header)) - memcpy(&channel->chan_hdr, local, - sizeof(struct channel_header)); - return visor_memregion_write(channel->memregion, offset, local, nbytes); + size_t chdr_size = sizeof(struct channel_header); + size_t copy_size; + + if (offset + nbytes > channel->nbytes) + return -EIO; + + if (offset < chdr_size) { + copy_size = min(chdr_size - offset, nbytes); + memcpy(&channel->chan_hdr + offset, local, copy_size); + } + + memcpy_toio(channel->mapped + offset, local, nbytes); + + return 0; } EXPORT_SYMBOL_GPL(visorchannel_write); @@ -247,38 +272,35 @@ int visorchannel_clear(struct visorchannel *channel, ulong offset, u8 ch, ulong nbytes) { - int rc = -1; - int bufsize = 65536; + int err; + int bufsize = PAGE_SIZE; int written = 0; - u8 *buf = vmalloc(bufsize); + u8 *buf; + buf = (u8 *) __get_free_page(GFP_KERNEL); if (!buf) - goto cleanup; + return -ENOMEM; memset(buf, ch, bufsize); + while (nbytes > 0) { - ulong thisbytes = bufsize; - int x = -1; + int thisbytes = bufsize; if (nbytes < thisbytes) thisbytes = nbytes; - x = visor_memregion_write(channel->memregion, offset + written, - buf, thisbytes); - if (x < 0) { - rc = x; + err = visorchannel_write(channel, offset + written, + buf, thisbytes); + if (err) goto cleanup; - } + written += thisbytes; nbytes -= thisbytes; } - rc = 0; + err = 0; cleanup: - if (buf) { - vfree(buf); - buf = NULL; - } - return rc; + free_page((unsigned long) buf); + return err; } EXPORT_SYMBOL_GPL(visorchannel_clear); @@ -306,108 +328,77 @@ EXPORT_SYMBOL_GPL(visorchannel_get_header); /** Write the contents of a specific field within a SIGNAL_QUEUE_HEADER back * into host memory */ -#define SIG_WRITE_FIELD(channel, queue, sig_hdr, FIELD) \ - (visor_memregion_write(channel->memregion, \ - SIG_QUEUE_OFFSET(&channel->chan_hdr, queue)+ \ - offsetof(struct signal_queue_header, FIELD),\ - &((sig_hdr)->FIELD), \ - sizeof((sig_hdr)->FIELD)) >= 0) - -static BOOL +#define SIG_WRITE_FIELD(channel, queue, sig_hdr, FIELD) \ + (visorchannel_write(channel, \ + SIG_QUEUE_OFFSET(&channel->chan_hdr, queue)+ \ + offsetof(struct signal_queue_header, FIELD), \ + &((sig_hdr)->FIELD), \ + sizeof((sig_hdr)->FIELD)) >= 0) + +static bool sig_read_header(struct visorchannel *channel, u32 queue, struct signal_queue_header *sig_hdr) { - BOOL rc = FALSE; + int err; if (channel->chan_hdr.ch_space_offset < sizeof(struct channel_header)) - goto cleanup; + return false; /* Read the appropriate SIGNAL_QUEUE_HEADER into local memory. */ + err = visorchannel_read(channel, + SIG_QUEUE_OFFSET(&channel->chan_hdr, queue), + sig_hdr, sizeof(struct signal_queue_header)); + if (err) + return false; - if (visor_memregion_read(channel->memregion, - SIG_QUEUE_OFFSET(&channel->chan_hdr, queue), - sig_hdr, - sizeof(struct signal_queue_header)) < 0) { - goto cleanup; - } - rc = TRUE; -cleanup: - return rc; + return true; } -static BOOL -sig_do_data(struct visorchannel *channel, u32 queue, - struct signal_queue_header *sig_hdr, u32 slot, void *data, - BOOL is_write) +static inline bool +sig_read_data(struct visorchannel *channel, u32 queue, + struct signal_queue_header *sig_hdr, u32 slot, void *data) { - BOOL rc = FALSE; + int err; int signal_data_offset = SIG_DATA_OFFSET(&channel->chan_hdr, queue, sig_hdr, slot); - if (is_write) { - if (visor_memregion_write(channel->memregion, - signal_data_offset, - data, sig_hdr->signal_size) < 0) { - goto cleanup; - } - } else { - if (visor_memregion_read(channel->memregion, signal_data_offset, - data, sig_hdr->signal_size) < 0) { - goto cleanup; - } - } - rc = TRUE; -cleanup: - return rc; -} -static inline BOOL -sig_read_data(struct visorchannel *channel, u32 queue, - struct signal_queue_header *sig_hdr, u32 slot, void *data) -{ - return sig_do_data(channel, queue, sig_hdr, slot, data, FALSE); + err = visorchannel_read(channel, signal_data_offset, + data, sig_hdr->signal_size); + if (err) + return false; + + return true; } -static inline BOOL +static inline bool sig_write_data(struct visorchannel *channel, u32 queue, struct signal_queue_header *sig_hdr, u32 slot, void *data) { - return sig_do_data(channel, queue, sig_hdr, slot, data, TRUE); -} - -static inline unsigned char -safe_sig_queue_validate(struct signal_queue_header *psafe_sqh, - struct signal_queue_header *punsafe_sqh, - u32 *phead, u32 *ptail) -{ - if ((*phead >= psafe_sqh->max_slots) || - (*ptail >= psafe_sqh->max_slots)) { - /* Choose 0 or max, maybe based on current tail value */ - *phead = 0; - *ptail = 0; + int err; + int signal_data_offset = SIG_DATA_OFFSET(&channel->chan_hdr, queue, + sig_hdr, slot); - /* Sync with client as necessary */ - punsafe_sqh->head = *phead; - punsafe_sqh->tail = *ptail; + err = visorchannel_write(channel, signal_data_offset, + data, sig_hdr->signal_size); + if (err) + return false; - return 0; - } - return 1; -} /* end safe_sig_queue_validate */ + return true; +} -static BOOL +static bool signalremove_inner(struct visorchannel *channel, u32 queue, void *msg) { struct signal_queue_header sig_hdr; if (!sig_read_header(channel, queue, &sig_hdr)) - return FALSE; + return false; if (sig_hdr.head == sig_hdr.tail) - return FALSE; /* no signals to remove */ + return false; /* no signals to remove */ sig_hdr.tail = (sig_hdr.tail + 1) % sig_hdr.max_slots; - if (!sig_read_data(channel, queue, &sig_hdr, sig_hdr.tail, msg)) { - return FALSE; - } + if (!sig_read_data(channel, queue, &sig_hdr, sig_hdr.tail, msg)) + return false; sig_hdr.num_received++; /* For each data field in SIGNAL_QUEUE_HEADER that was modified, @@ -415,16 +406,16 @@ signalremove_inner(struct visorchannel *channel, u32 queue, void *msg) */ mb(); /* required for channel synch */ if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, tail)) - return FALSE; + return false; if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_received)) - return FALSE; - return TRUE; + return false; + return true; } -BOOL +bool visorchannel_signalremove(struct visorchannel *channel, u32 queue, void *msg) { - BOOL rc; + bool rc; if (channel->needs_lock) { spin_lock(&channel->remove_lock); @@ -438,29 +429,28 @@ visorchannel_signalremove(struct visorchannel *channel, u32 queue, void *msg) } EXPORT_SYMBOL_GPL(visorchannel_signalremove); -static BOOL +static bool signalinsert_inner(struct visorchannel *channel, u32 queue, void *msg) { struct signal_queue_header sig_hdr; if (!sig_read_header(channel, queue, &sig_hdr)) - return FALSE; + return false; sig_hdr.head = ((sig_hdr.head + 1) % sig_hdr.max_slots); if (sig_hdr.head == sig_hdr.tail) { sig_hdr.num_overflows++; - visor_memregion_write(channel->memregion, - SIG_QUEUE_OFFSET(&channel->chan_hdr, - queue) + - offsetof(struct signal_queue_header, - num_overflows), - &(sig_hdr.num_overflows), - sizeof(sig_hdr.num_overflows)); - return FALSE; + visorchannel_write(channel, + SIG_QUEUE_OFFSET(&channel->chan_hdr, queue) + + offsetof(struct signal_queue_header, + num_overflows), + &(sig_hdr.num_overflows), + sizeof(sig_hdr.num_overflows)); + return false; } if (!sig_write_data(channel, queue, &sig_hdr, sig_hdr.head, msg)) - return FALSE; + return false; sig_hdr.num_sent++; @@ -469,18 +459,17 @@ signalinsert_inner(struct visorchannel *channel, u32 queue, void *msg) */ mb(); /* required for channel synch */ if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, head)) - return FALSE; - if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_sent)) { - return FALSE; - } + return false; + if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, num_sent)) + return false; - return TRUE; + return true; } -BOOL +bool visorchannel_signalinsert(struct visorchannel *channel, u32 queue, void *msg) { - BOOL rc; + bool rc; if (channel->needs_lock) { spin_lock(&channel->insert_lock); @@ -552,9 +541,8 @@ void visorchannel_debug(struct visorchannel *channel, int num_queues, struct seq_file *seq, u32 off) { - HOSTADDRESS addr = 0; + u64 addr = 0; ulong nbytes = 0, nbytes_region = 0; - struct memregion *memregion = NULL; struct channel_header hdr; struct channel_header *phdr = &hdr; int i = 0; @@ -562,12 +550,9 @@ visorchannel_debug(struct visorchannel *channel, int num_queues, if (!channel) return; - memregion = channel->memregion; - if (!memregion) - return; - addr = visor_memregion_get_physaddr(memregion); - nbytes_region = visor_memregion_get_nbytes(memregion); + addr = visorchannel_get_physaddr(channel); + nbytes_region = visorchannel_get_nbytes(channel); errcode = visorchannel_read(channel, off, phdr, sizeof(struct channel_header)); if (errcode < 0) { @@ -626,40 +611,3 @@ visorchannel_debug(struct visorchannel *channel, int num_queues, addr + off, nbytes); } EXPORT_SYMBOL_GPL(visorchannel_debug); - -void -visorchannel_dump_section(struct visorchannel *chan, char *s, - int off, int len, struct seq_file *seq) -{ - char *buf, *tbuf, *fmtbuf; - int fmtbufsize = 0; - int i; - int errcode = 0; - - fmtbufsize = 100 * COVQ(len, 16); - buf = kmalloc(len, GFP_KERNEL|__GFP_NORETRY); - if (!buf) - return; - fmtbuf = kmalloc(fmtbufsize, GFP_KERNEL|__GFP_NORETRY); - if (!fmtbuf) - goto fmt_failed; - - errcode = visorchannel_read(chan, off, buf, len); - if (errcode < 0) - goto read_failed; - seq_printf(seq, "channel %s:\n", s); - tbuf = buf; - while (len > 0) { - i = (len < 16) ? len : 16; - hex_dump_to_buffer(tbuf, i, 16, 1, fmtbuf, fmtbufsize, TRUE); - seq_printf(seq, "%s\n", fmtbuf); - tbuf += 16; - len -= 16; - } - -read_failed: - kfree(fmtbuf); -fmt_failed: - kfree(buf); -} -EXPORT_SYMBOL_GPL(visorchannel_dump_section); diff --git a/drivers/staging/unisys/visorchipset/visorchipset_main.c b/drivers/staging/unisys/visorbus/visorchipset.c index f2663d2c7..bb8087e70 100644 --- a/drivers/staging/unisys/visorchipset/visorchipset_main.c +++ b/drivers/staging/unisys/visorbus/visorchipset.c @@ -15,27 +15,28 @@ * details. */ -#include "globals.h" -#include "visorchipset.h" -#include "procobjecttree.h" -#include "visorchannel.h" -#include "periodic_work.h" -#include "file.h" -#include "parser.h" -#include "uisutils.h" -#include "controlvmcompletionstatus.h" -#include "guestlinuxdebug.h" - +#include <linux/acpi.h> +#include <linux/cdev.h> +#include <linux/ctype.h> +#include <linux/fs.h> +#include <linux/mm.h> #include <linux/nls.h> #include <linux/netdevice.h> #include <linux/platform_device.h> #include <linux/uuid.h> +#include <linux/crash_dump.h> + +#include "channel_guid.h" +#include "controlvmchannel.h" +#include "controlvmcompletionstatus.h" +#include "guestlinuxdebug.h" +#include "periodic_work.h" +#include "version.h" +#include "visorbus.h" +#include "visorbus_private.h" +#include "vmcallinterface.h" #define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c -#define TEST_VNIC_PHYSITF "eth0" /* physical network itf for - * vnic loopback test */ -#define TEST_VNIC_SWITCHNO 1 -#define TEST_VNIC_BUSNO 9 #define MAX_NAME_SIZE 128 #define MAX_IP_SIZE 50 @@ -43,82 +44,88 @@ #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 +#define MAX_CONTROLVM_PAYLOAD_BYTES (1024*128) + +#define VISORCHIPSET_MMAP_CONTROLCHANOFFSET 0x00000000 + + +#define UNISYS_SPAR_LEAF_ID 0x40000000 + +/* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ +#define UNISYS_SPAR_ID_EBX 0x73696e55 +#define UNISYS_SPAR_ID_ECX 0x70537379 +#define UNISYS_SPAR_ID_EDX 0x34367261 + +/* + * Module parameters + */ +static int visorchipset_major; +static int visorchipset_visorbusregwait = 1; /* default is on */ +static int visorchipset_holdchipsetready; +static unsigned long controlvm_payload_bytes_buffered; + +static int +visorchipset_open(struct inode *inode, struct file *file) +{ + unsigned minor_number = iminor(inode); + + if (minor_number) + return -ENODEV; + file->private_data = NULL; + return 0; +} + +static int +visorchipset_release(struct inode *inode, struct file *file) +{ + return 0; +} + /* When the controlvm channel is idle for at least MIN_IDLE_SECONDS, * we switch to slow polling mode. As soon as we get a controlvm * message, we switch back to fast polling mode. */ #define MIN_IDLE_SECONDS 10 -static ulong poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; -static ulong most_recent_message_jiffies; /* when we got our last +static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; +static unsigned long most_recent_message_jiffies; /* when we got our last * controlvm message */ -static inline char * -NONULLSTR(char *s) -{ - if (s) - return s; - return ""; -} - -static int serverregistered; -static int clientregistered; +static int visorbusregistered; #define MAX_CHIPSET_EVENTS 2 static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 }; +struct parser_context { + unsigned long allocbytes; + unsigned long param_bytes; + u8 *curr; + unsigned long bytes_remaining; + bool byte_stream; + char data[0]; +}; + static struct delayed_work periodic_controlvm_work; static struct workqueue_struct *periodic_controlvm_workqueue; static DEFINE_SEMAPHORE(notifier_lock); -static struct controlvm_message_header g_diag_msg_hdr; +static struct cdev file_cdev; +static struct visorchannel **file_controlvm_channel; static struct controlvm_message_header g_chipset_msg_hdr; -static struct controlvm_message_header g_del_dump_msg_hdr; -static const uuid_le spar_diag_pool_channel_protocol_uuid = - SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID; -/* 0xffffff is an invalid Bus/Device number */ -static ulong g_diagpool_bus_no = 0xffffff; -static ulong g_diagpool_dev_no = 0xffffff; static struct controlvm_message_packet g_devicechangestate_packet; -/* Only VNIC and VHBA channels are sent to visorclientbus (aka - * "visorhackbus") - */ -#define FOR_VISORHACKBUS(channel_type_guid) \ - (((uuid_le_cmp(channel_type_guid,\ - spar_vnic_channel_protocol_uuid) == 0) ||\ - (uuid_le_cmp(channel_type_guid,\ - spar_vhba_channel_protocol_uuid) == 0))) -#define FOR_VISORBUS(channel_type_guid) (!(FOR_VISORHACKBUS(channel_type_guid))) - -#define is_diagpool_channel(channel_type_guid) \ - (uuid_le_cmp(channel_type_guid,\ - spar_diag_pool_channel_protocol_uuid) == 0) - static LIST_HEAD(bus_info_list); static LIST_HEAD(dev_info_list); static struct visorchannel *controlvm_channel; /* Manages the request payload in the controlvm channel */ -static struct controlvm_payload_info { +struct visor_controlvm_payload_info { u8 __iomem *ptr; /* pointer to base address of payload pool */ u64 offset; /* offset from beginning of controlvm * channel to beginning of payload * pool */ u32 bytes; /* number of bytes in payload pool */ -} controlvm_payload_info; +}; -/* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / - * CONTROLVM_DUMP_GETTEXTDUMP / CONTROLVM_DUMP_COMPLETE conversation. - */ -static struct livedump_info { - struct controlvm_message_header dumpcapture_header; - struct controlvm_message_header gettextdump_header; - struct controlvm_message_header dumpcomplete_header; - BOOL gettextdump_outstanding; - u32 crc32; - ulong length; - atomic_t buffers_in_use; - ulong destination; -} livedump_info; +static struct visor_controlvm_payload_info controlvm_payload_info; /* The following globals are used to handle the scenario where we are unable to * offload the payload from a controlvm message due to memory requirements. In @@ -126,14 +133,7 @@ static struct livedump_info { * process it again the next time controlvm_periodic_work() runs. */ static struct controlvm_message controlvm_pending_msg; -static BOOL controlvm_pending_msg_valid = FALSE; - -/* Pool of struct putfile_buffer_entry, for keeping track of pending (incoming) - * TRANSMIT_FILE PutFile payloads. - */ -static struct kmem_cache *putfile_buffer_list_pool; -static const char putfile_buffer_list_pool_name[] = - "controlvm_putfile_buffer_list_pool"; +static bool controlvm_pending_msg_valid; /* This identifies a data buffer that has been received via a controlvm messages * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation. @@ -203,8 +203,6 @@ struct putfile_request { int completion_status; }; -static atomic_t visorchipset_cache_buffers_in_use = ATOMIC_INIT(0); - struct parahotplug_request { struct list_head list; int id; @@ -219,14 +217,16 @@ static void parahotplug_process_list(void); /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / * CONTROLVM_REPORTEVENT. */ -static struct visorchipset_busdev_notifiers busdev_server_notifiers; -static struct visorchipset_busdev_notifiers busdev_client_notifiers; +static struct visorchipset_busdev_notifiers busdev_notifiers; -static void bus_create_response(ulong bus_no, int response); -static void bus_destroy_response(ulong bus_no, int response); -static void device_create_response(ulong bus_no, ulong dev_no, int response); -static void device_destroy_response(ulong bus_no, ulong dev_no, int response); -static void device_resume_response(ulong bus_no, ulong dev_no, int response); +static void bus_create_response(struct visor_device *p, int response); +static void bus_destroy_response(struct visor_device *p, int response); +static void device_create_response(struct visor_device *p, int response); +static void device_destroy_response(struct visor_device *p, int response); +static void device_resume_response(struct visor_device *p, int response); + +static void visorchipset_device_pause_response(struct visor_device *p, + int response); static struct visorchipset_busdev_responders busdev_responders = { .bus_create = bus_create_response, @@ -331,11 +331,16 @@ static const struct attribute_group *visorchipset_dev_groups[] = { NULL }; +static void visorchipset_dev_release(struct device *dev) +{ +} + /* /sys/devices/platform/visorchipset */ static struct platform_device visorchipset_platform_device = { .name = "visorchipset", .id = -1, .dev.groups = visorchipset_dev_groups, + .dev.release = visorchipset_dev_release, }; /* Function prototypes */ @@ -348,6 +353,183 @@ static void controlvm_respond_physdev_changestate( struct controlvm_message_header *msg_hdr, int response, struct spar_segment_state state); + +static void parser_done(struct parser_context *ctx); + +static struct parser_context * +parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) +{ + int allocbytes = sizeof(struct parser_context) + bytes; + struct parser_context *rc = NULL; + struct parser_context *ctx = NULL; + + if (retry) + *retry = false; + + /* + * alloc an 0 extra byte to ensure payload is + * '\0'-terminated + */ + allocbytes++; + if ((controlvm_payload_bytes_buffered + bytes) + > MAX_CONTROLVM_PAYLOAD_BYTES) { + if (retry) + *retry = true; + rc = NULL; + goto cleanup; + } + ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY); + if (!ctx) { + if (retry) + *retry = true; + rc = NULL; + goto cleanup; + } + + ctx->allocbytes = allocbytes; + ctx->param_bytes = bytes; + ctx->curr = NULL; + ctx->bytes_remaining = 0; + ctx->byte_stream = false; + if (local) { + void *p; + + if (addr > virt_to_phys(high_memory - 1)) { + rc = NULL; + goto cleanup; + } + p = __va((unsigned long) (addr)); + memcpy(ctx->data, p, bytes); + } else { + void __iomem *mapping; + + if (!request_mem_region(addr, bytes, "visorchipset")) { + rc = NULL; + goto cleanup; + } + + mapping = ioremap_cache(addr, bytes); + if (!mapping) { + release_mem_region(addr, bytes); + rc = NULL; + goto cleanup; + } + memcpy_fromio(ctx->data, mapping, bytes); + release_mem_region(addr, bytes); + } + + ctx->byte_stream = true; + rc = ctx; +cleanup: + if (rc) { + controlvm_payload_bytes_buffered += ctx->param_bytes; + } else { + if (ctx) { + parser_done(ctx); + ctx = NULL; + } + } + return rc; +} + +static uuid_le +parser_id_get(struct parser_context *ctx) +{ + struct spar_controlvm_parameters_header *phdr = NULL; + + if (ctx == NULL) + return NULL_UUID_LE; + phdr = (struct spar_controlvm_parameters_header *)(ctx->data); + return phdr->id; +} + +/** Describes the state from the perspective of which controlvm messages have + * been received for a bus or device. + */ + +enum PARSER_WHICH_STRING { + PARSERSTRING_INITIATOR, + PARSERSTRING_TARGET, + PARSERSTRING_CONNECTION, + PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ +}; + +static void +parser_param_start(struct parser_context *ctx, + enum PARSER_WHICH_STRING which_string) +{ + struct spar_controlvm_parameters_header *phdr = NULL; + + if (ctx == NULL) + goto Away; + phdr = (struct spar_controlvm_parameters_header *)(ctx->data); + switch (which_string) { + case PARSERSTRING_INITIATOR: + ctx->curr = ctx->data + phdr->initiator_offset; + ctx->bytes_remaining = phdr->initiator_length; + break; + case PARSERSTRING_TARGET: + ctx->curr = ctx->data + phdr->target_offset; + ctx->bytes_remaining = phdr->target_length; + break; + case PARSERSTRING_CONNECTION: + ctx->curr = ctx->data + phdr->connection_offset; + ctx->bytes_remaining = phdr->connection_length; + break; + case PARSERSTRING_NAME: + ctx->curr = ctx->data + phdr->name_offset; + ctx->bytes_remaining = phdr->name_length; + break; + default: + break; + } + +Away: + return; +} + +static void parser_done(struct parser_context *ctx) +{ + if (!ctx) + return; + controlvm_payload_bytes_buffered -= ctx->param_bytes; + kfree(ctx); +} + +static void * +parser_string_get(struct parser_context *ctx) +{ + u8 *pscan; + unsigned long nscan; + int value_length = -1; + void *value = NULL; + int i; + + if (!ctx) + return NULL; + pscan = ctx->curr; + nscan = ctx->bytes_remaining; + if (nscan == 0) + return NULL; + if (!pscan) + return NULL; + for (i = 0, value_length = -1; i < nscan; i++) + if (pscan[i] == '\0') { + value_length = i; + break; + } + if (value_length < 0) /* '\0' was not included in the length */ + value_length = nscan; + value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); + if (value == NULL) + return NULL; + if (value_length > 0) + memcpy(value, pscan, value_length); + ((u8 *) (value))[value_length] = '\0'; + return value; +} + + static ssize_t toolaction_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -367,7 +549,7 @@ static ssize_t toolaction_store(struct device *dev, u8 tool_action; int ret; - if (kstrtou8(buf, 10, &tool_action) != 0) + if (kstrtou8(buf, 10, &tool_action)) return -EINVAL; ret = visorchannel_write(controlvm_channel, @@ -401,7 +583,7 @@ static ssize_t boottotool_store(struct device *dev, int val, ret; struct efi_spar_indication efi_spar_indication; - if (kstrtoint(buf, 10, &val) != 0) + if (kstrtoint(buf, 10, &val)) return -EINVAL; efi_spar_indication.boot_to_tool = val; @@ -433,7 +615,7 @@ static ssize_t error_store(struct device *dev, struct device_attribute *attr, u32 error; int ret; - if (kstrtou32(buf, 10, &error) != 0) + if (kstrtou32(buf, 10, &error)) return -EINVAL; ret = visorchannel_write(controlvm_channel, @@ -463,7 +645,7 @@ static ssize_t textid_store(struct device *dev, struct device_attribute *attr, u32 text_id; int ret; - if (kstrtou32(buf, 10, &text_id) != 0) + if (kstrtou32(buf, 10, &text_id)) return -EINVAL; ret = visorchannel_write(controlvm_channel, @@ -494,7 +676,7 @@ static ssize_t remaining_steps_store(struct device *dev, u16 remaining_steps; int ret; - if (kstrtou16(buf, 10, &remaining_steps) != 0) + if (kstrtou16(buf, 10, &remaining_steps)) return -EINVAL; ret = visorchannel_write(controlvm_channel, @@ -506,30 +688,44 @@ static ssize_t remaining_steps_store(struct device *dev, return count; } -static void -bus_info_clear(void *v) -{ - struct visorchipset_bus_info *p = (struct visorchipset_bus_info *) (v); +struct visor_busdev { + u32 bus_no; + u32 dev_no; +}; - kfree(p->name); - p->name = NULL; +static int match_visorbus_dev_by_id(struct device *dev, void *data) +{ + struct visor_device *vdev = to_visor_device(dev); + struct visor_busdev *id = (struct visor_busdev *)data; + u32 bus_no = id->bus_no; + u32 dev_no = id->dev_no; - kfree(p->description); - p->description = NULL; + if ((vdev->chipset_bus_no == bus_no) && + (vdev->chipset_dev_no == dev_no)) + return 1; - p->state.created = 0; - memset(p, 0, sizeof(struct visorchipset_bus_info)); + return 0; } - -static void -dev_info_clear(void *v) +struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, + struct visor_device *from) { - struct visorchipset_device_info *p = - (struct visorchipset_device_info *)(v); + struct device *dev; + struct device *dev_start = NULL; + struct visor_device *vdev = NULL; + struct visor_busdev id = { + .bus_no = bus_no, + .dev_no = dev_no + }; - p->state.created = 0; - memset(p, 0, sizeof(struct visorchipset_device_info)); + if (from) + dev_start = &from->device; + dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, + match_visorbus_dev_by_id); + if (dev) + vdev = to_visor_device(dev); + return vdev; } +EXPORT_SYMBOL(visorbus_get_device_by_id); static u8 check_chipset_events(void) @@ -552,19 +748,19 @@ clear_chipset_events(void) } void -visorchipset_register_busdev_server( +visorchipset_register_busdev( struct visorchipset_busdev_notifiers *notifiers, struct visorchipset_busdev_responders *responders, struct ultra_vbus_deviceinfo *driver_info) { down(¬ifier_lock); if (!notifiers) { - memset(&busdev_server_notifiers, 0, - sizeof(busdev_server_notifiers)); - serverregistered = 0; /* clear flag */ + memset(&busdev_notifiers, 0, + sizeof(busdev_notifiers)); + visorbusregistered = 0; /* clear flag */ } else { - busdev_server_notifiers = *notifiers; - serverregistered = 1; /* set flag */ + busdev_notifiers = *notifiers; + visorbusregistered = 1; /* set flag */ } if (responders) *responders = busdev_responders; @@ -574,50 +770,7 @@ visorchipset_register_busdev_server( up(¬ifier_lock); } -EXPORT_SYMBOL_GPL(visorchipset_register_busdev_server); - -void -visorchipset_register_busdev_client( - struct visorchipset_busdev_notifiers *notifiers, - struct visorchipset_busdev_responders *responders, - struct ultra_vbus_deviceinfo *driver_info) -{ - down(¬ifier_lock); - if (!notifiers) { - memset(&busdev_client_notifiers, 0, - sizeof(busdev_client_notifiers)); - clientregistered = 0; /* clear flag */ - } else { - busdev_client_notifiers = *notifiers; - clientregistered = 1; /* set flag */ - } - if (responders) - *responders = busdev_responders; - if (driver_info) - bus_device_info_init(driver_info, "chipset(bolts)", - "visorchipset", VERSION, NULL); - up(¬ifier_lock); -} -EXPORT_SYMBOL_GPL(visorchipset_register_busdev_client); - -static void -cleanup_controlvm_structures(void) -{ - struct visorchipset_bus_info *bi, *tmp_bi; - struct visorchipset_device_info *di, *tmp_di; - - list_for_each_entry_safe(bi, tmp_bi, &bus_info_list, entry) { - bus_info_clear(bi); - list_del(&bi->entry); - kfree(bi); - } - - list_for_each_entry_safe(di, tmp_di, &dev_info_list, entry) { - dev_info_clear(di); - list_del(&di->entry); - kfree(di); - } -} +EXPORT_SYMBOL_GPL(visorchipset_register_busdev); static void chipset_init(struct controlvm_message *inmsg) @@ -645,8 +798,6 @@ chipset_init(struct controlvm_message *inmsg) features |= ULTRA_CHIPSET_FEATURE_REPLY; cleanup: - if (rc < 0) - cleanup_controlvm_structures(); if (inmsg->hdr.flags.response_expected) controlvm_respond_chipset_init(&inmsg->hdr, rc, features); } @@ -672,14 +823,6 @@ controlvm_respond(struct controlvm_message_header *msg_hdr, int response) struct controlvm_message outmsg; controlvm_init_response(&outmsg, msg_hdr, response); - /* For DiagPool channel DEVICE_CHANGESTATE, we need to send - * back the deviceChangeState structure in the packet. */ - if (msg_hdr->id == CONTROLVM_DEVICE_CHANGESTATE && - g_devicechangestate_packet.device_change_state.bus_no == - g_diagpool_bus_no && - g_devicechangestate_packet.device_change_state.dev_no == - g_diagpool_dev_no) - outmsg.cmd = g_devicechangestate_packet; if (outmsg.hdr.flags.test_message == 1) return; @@ -719,113 +862,40 @@ static void controlvm_respond_physdev_changestate( } } -void -visorchipset_save_message(struct controlvm_message *msg, - enum crash_obj_type type) -{ - u32 crash_msg_offset; - u16 crash_msg_count; - - /* get saved message count */ - if (visorchannel_read(controlvm_channel, - offsetof(struct spar_controlvm_channel_protocol, - saved_crash_message_count), - &crash_msg_count, sizeof(u16)) < 0) { - POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, - POSTCODE_SEVERITY_ERR); - return; - } - - if (crash_msg_count != CONTROLVM_CRASHMSG_MAX) { - POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, - crash_msg_count, - POSTCODE_SEVERITY_ERR); - return; - } - - /* get saved crash message offset */ - if (visorchannel_read(controlvm_channel, - offsetof(struct spar_controlvm_channel_protocol, - saved_crash_message_offset), - &crash_msg_offset, sizeof(u32)) < 0) { - POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, - POSTCODE_SEVERITY_ERR); - return; - } - - if (type == CRASH_BUS) { - if (visorchannel_write(controlvm_channel, - crash_msg_offset, - msg, - sizeof(struct controlvm_message)) < 0) { - POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC, - POSTCODE_SEVERITY_ERR); - return; - } - } else { - if (visorchannel_write(controlvm_channel, - crash_msg_offset + - sizeof(struct controlvm_message), msg, - sizeof(struct controlvm_message)) < 0) { - POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC, - POSTCODE_SEVERITY_ERR); - return; - } - } -} -EXPORT_SYMBOL_GPL(visorchipset_save_message); +enum crash_obj_type { + CRASH_DEV, + CRASH_BUS, +}; static void -bus_responder(enum controlvm_id cmd_id, ulong bus_no, int response) +bus_responder(enum controlvm_id cmd_id, + struct controlvm_message_header *pending_msg_hdr, + int response) { - struct visorchipset_bus_info *p = NULL; - BOOL need_clear = FALSE; + if (pending_msg_hdr == NULL) + return; /* no controlvm response needed */ - p = findbus(&bus_info_list, bus_no); - if (!p) + if (pending_msg_hdr->id != (u32)cmd_id) return; - if (response < 0) { - if ((cmd_id == CONTROLVM_BUS_CREATE) && - (response != (-CONTROLVM_RESP_ERROR_ALREADY_DONE))) - /* undo the row we just created... */ - delbusdevices(&dev_info_list, bus_no); - } else { - if (cmd_id == CONTROLVM_BUS_CREATE) - p->state.created = 1; - if (cmd_id == CONTROLVM_BUS_DESTROY) - need_clear = TRUE; - } - - if (p->pending_msg_hdr.id == CONTROLVM_INVALID) - return; /* no controlvm response needed */ - if (p->pending_msg_hdr.id != (u32)cmd_id) - return; - controlvm_respond(&p->pending_msg_hdr, response); - p->pending_msg_hdr.id = CONTROLVM_INVALID; - if (need_clear) { - bus_info_clear(p); - delbusdevices(&dev_info_list, bus_no); - } + controlvm_respond(pending_msg_hdr, response); } static void device_changestate_responder(enum controlvm_id cmd_id, - ulong bus_no, ulong dev_no, int response, + struct visor_device *p, int response, struct spar_segment_state response_state) { - struct visorchipset_device_info *p = NULL; struct controlvm_message outmsg; + u32 bus_no = p->chipset_bus_no; + u32 dev_no = p->chipset_dev_no; - p = finddevice(&dev_info_list, bus_no, dev_no); - if (!p) - return; - if (p->pending_msg_hdr.id == CONTROLVM_INVALID) + if (p->pending_msg_hdr == NULL) return; /* no controlvm response needed */ - if (p->pending_msg_hdr.id != cmd_id) + if (p->pending_msg_hdr->id != cmd_id) return; - controlvm_init_response(&outmsg, &p->pending_msg_hdr, response); + controlvm_init_response(&outmsg, p->pending_msg_hdr, response); outmsg.cmd.device_change_state.bus_no = bus_no; outmsg.cmd.device_change_state.dev_no = dev_no; @@ -834,96 +904,74 @@ device_changestate_responder(enum controlvm_id cmd_id, if (!visorchannel_signalinsert(controlvm_channel, CONTROLVM_QUEUE_REQUEST, &outmsg)) return; - - p->pending_msg_hdr.id = CONTROLVM_INVALID; } static void -device_responder(enum controlvm_id cmd_id, ulong bus_no, ulong dev_no, +device_responder(enum controlvm_id cmd_id, + struct controlvm_message_header *pending_msg_hdr, int response) { - struct visorchipset_device_info *p = NULL; - BOOL need_clear = FALSE; - - p = finddevice(&dev_info_list, bus_no, dev_no); - if (!p) - return; - if (response >= 0) { - if (cmd_id == CONTROLVM_DEVICE_CREATE) - p->state.created = 1; - if (cmd_id == CONTROLVM_DEVICE_DESTROY) - need_clear = TRUE; - } - - if (p->pending_msg_hdr.id == CONTROLVM_INVALID) + if (pending_msg_hdr == NULL) return; /* no controlvm response needed */ - if (p->pending_msg_hdr.id != (u32)cmd_id) + if (pending_msg_hdr->id != (u32)cmd_id) return; - controlvm_respond(&p->pending_msg_hdr, response); - p->pending_msg_hdr.id = CONTROLVM_INVALID; - if (need_clear) - dev_info_clear(p); + controlvm_respond(pending_msg_hdr, response); } static void -bus_epilog(u32 bus_no, +bus_epilog(struct visor_device *bus_info, u32 cmd, struct controlvm_message_header *msg_hdr, - int response, BOOL need_response) + int response, bool need_response) { - BOOL notified = FALSE; + bool notified = false; + struct controlvm_message_header *pmsg_hdr = NULL; - struct visorchipset_bus_info *bus_info = findbus(&bus_info_list, - bus_no); + if (!bus_info) { + /* relying on a valid passed in response code */ + /* be lazy and re-use msg_hdr for this failure, is this ok?? */ + pmsg_hdr = msg_hdr; + goto away; + } - if (!bus_info) - return; + if (bus_info->pending_msg_hdr) { + /* only non-NULL if dev is still waiting on a response */ + response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; + pmsg_hdr = bus_info->pending_msg_hdr; + goto away; + } if (need_response) { - memcpy(&bus_info->pending_msg_hdr, msg_hdr, + pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); + if (!pmsg_hdr) { + response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; + goto away; + } + + memcpy(pmsg_hdr, msg_hdr, sizeof(struct controlvm_message_header)); - } else { - bus_info->pending_msg_hdr.id = CONTROLVM_INVALID; + bus_info->pending_msg_hdr = pmsg_hdr; } down(¬ifier_lock); if (response == CONTROLVM_RESP_SUCCESS) { switch (cmd) { case CONTROLVM_BUS_CREATE: - /* We can't tell from the bus_create - * information which of our 2 bus flavors the - * devices on this bus will ultimately end up. - * FORTUNATELY, it turns out it is harmless to - * send the bus_create to both of them. We can - * narrow things down a little bit, though, - * because we know: - BusDev_Server can handle - * either server or client devices - * - BusDev_Client can handle ONLY client - * devices */ - if (busdev_server_notifiers.bus_create) { - (*busdev_server_notifiers.bus_create) (bus_no); - notified = TRUE; - } - if ((!bus_info->flags.server) /*client */ && - busdev_client_notifiers.bus_create) { - (*busdev_client_notifiers.bus_create) (bus_no); - notified = TRUE; + if (busdev_notifiers.bus_create) { + (*busdev_notifiers.bus_create) (bus_info); + notified = true; } break; case CONTROLVM_BUS_DESTROY: - if (busdev_server_notifiers.bus_destroy) { - (*busdev_server_notifiers.bus_destroy) (bus_no); - notified = TRUE; - } - if ((!bus_info->flags.server) /*client */ && - busdev_client_notifiers.bus_destroy) { - (*busdev_client_notifiers.bus_destroy) (bus_no); - notified = TRUE; + if (busdev_notifiers.bus_destroy) { + (*busdev_notifiers.bus_destroy) (bus_info); + notified = true; } break; } } +away: if (notified) /* The callback function just called above is responsible * for calling the appropriate visorchipset_busdev_responders @@ -931,37 +979,51 @@ bus_epilog(u32 bus_no, */ ; else - bus_responder(cmd, bus_no, response); + /* + * Do not kfree(pmsg_hdr) as this is the failure path. + * The success path ('notified') will call the responder + * directly and kfree() there. + */ + bus_responder(cmd, pmsg_hdr, response); up(¬ifier_lock); } static void -device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, +device_epilog(struct visor_device *dev_info, + struct spar_segment_state state, u32 cmd, struct controlvm_message_header *msg_hdr, int response, - BOOL need_response, BOOL for_visorbus) + bool need_response, bool for_visorbus) { - struct visorchipset_busdev_notifiers *notifiers = NULL; - BOOL notified = FALSE; + struct visorchipset_busdev_notifiers *notifiers; + bool notified = false; + struct controlvm_message_header *pmsg_hdr = NULL; - struct visorchipset_device_info *dev_info = - finddevice(&dev_info_list, bus_no, dev_no); - char *envp[] = { - "SPARSP_DIAGPOOL_PAUSED_STATE = 1", - NULL - }; + notifiers = &busdev_notifiers; - if (!dev_info) - return; + if (!dev_info) { + /* relying on a valid passed in response code */ + /* be lazy and re-use msg_hdr for this failure, is this ok?? */ + pmsg_hdr = msg_hdr; + goto away; + } + + if (dev_info->pending_msg_hdr) { + /* only non-NULL if dev is still waiting on a response */ + response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; + pmsg_hdr = dev_info->pending_msg_hdr; + goto away; + } - if (for_visorbus) - notifiers = &busdev_server_notifiers; - else - notifiers = &busdev_client_notifiers; if (need_response) { - memcpy(&dev_info->pending_msg_hdr, msg_hdr, + pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); + if (!pmsg_hdr) { + response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; + goto away; + } + + memcpy(pmsg_hdr, msg_hdr, sizeof(struct controlvm_message_header)); - } else { - dev_info->pending_msg_hdr.id = CONTROLVM_INVALID; + dev_info->pending_msg_hdr = pmsg_hdr; } down(¬ifier_lock); @@ -969,8 +1031,8 @@ device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, switch (cmd) { case CONTROLVM_DEVICE_CREATE: if (notifiers->device_create) { - (*notifiers->device_create) (bus_no, dev_no); - notified = TRUE; + (*notifiers->device_create) (dev_info); + notified = true; } break; case CONTROLVM_DEVICE_CHANGESTATE: @@ -979,9 +1041,8 @@ device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, state.operating == segment_state_running.operating) { if (notifiers->device_resume) { - (*notifiers->device_resume) (bus_no, - dev_no); - notified = TRUE; + (*notifiers->device_resume) (dev_info); + notified = true; } } /* ServerNotReady / ServerLost / SegmentStateStandby */ @@ -992,35 +1053,20 @@ device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, * where server is lost */ if (notifiers->device_pause) { - (*notifiers->device_pause) (bus_no, - dev_no); - notified = TRUE; - } - } else if (state.alive == segment_state_paused.alive && - state.operating == - segment_state_paused.operating) { - /* this is lite pause where channel is - * still valid just 'pause' of it - */ - if (bus_no == g_diagpool_bus_no && - dev_no == g_diagpool_dev_no) { - /* this will trigger the - * diag_shutdown.sh script in - * the visorchipset hotplug */ - kobject_uevent_env - (&visorchipset_platform_device.dev. - kobj, KOBJ_ONLINE, envp); + (*notifiers->device_pause) (dev_info); + notified = true; } } break; case CONTROLVM_DEVICE_DESTROY: if (notifiers->device_destroy) { - (*notifiers->device_destroy) (bus_no, dev_no); - notified = TRUE; + (*notifiers->device_destroy) (dev_info); + notified = true; } break; } } +away: if (notified) /* The callback function just called above is responsible * for calling the appropriate visorchipset_busdev_responders @@ -1028,7 +1074,12 @@ device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, */ ; else - device_responder(cmd, bus_no, dev_no, response); + /* + * Do not kfree(pmsg_hdr) as this is the failure path. + * The success path ('notified') will call the responder + * directly and kfree() there. + */ + device_responder(cmd, pmsg_hdr, response); up(¬ifier_lock); } @@ -1036,11 +1087,12 @@ static void bus_create(struct controlvm_message *inmsg) { struct controlvm_message_packet *cmd = &inmsg->cmd; - ulong bus_no = cmd->create_bus.bus_no; + u32 bus_no = cmd->create_bus.bus_no; int rc = CONTROLVM_RESP_SUCCESS; - struct visorchipset_bus_info *bus_info = NULL; + struct visor_device *bus_info; + struct visorchannel *visorchannel; - bus_info = findbus(&bus_info_list, bus_no); + bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); if (bus_info && (bus_info->state.created == 1)) { POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, POSTCODE_SEVERITY_ERR); @@ -1055,30 +1107,31 @@ bus_create(struct controlvm_message *inmsg) goto cleanup; } - INIT_LIST_HEAD(&bus_info->entry); - bus_info->bus_no = bus_no; - bus_info->dev_no = cmd->create_bus.dev_count; + INIT_LIST_HEAD(&bus_info->list_all); + bus_info->chipset_bus_no = bus_no; + bus_info->chipset_dev_no = BUS_ROOT_DEVICE; POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); - if (inmsg->hdr.flags.test_message == 1) - bus_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; - else - bus_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; - - bus_info->flags.server = inmsg->hdr.flags.server; - bus_info->chan_info.channel_addr = cmd->create_bus.channel_addr; - bus_info->chan_info.n_channel_bytes = cmd->create_bus.channel_bytes; - bus_info->chan_info.channel_type_uuid = - cmd->create_bus.bus_data_type_uuid; - bus_info->chan_info.channel_inst_uuid = cmd->create_bus.bus_inst_uuid; + visorchannel = visorchannel_create(cmd->create_bus.channel_addr, + cmd->create_bus.channel_bytes, + GFP_KERNEL, + cmd->create_bus.bus_data_type_uuid); - list_add(&bus_info->entry, &bus_info_list); + if (!visorchannel) { + POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; + kfree(bus_info); + bus_info = NULL; + goto cleanup; + } + bus_info->visorchannel = visorchannel; POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); cleanup: - bus_epilog(bus_no, CONTROLVM_BUS_CREATE, &inmsg->hdr, + bus_epilog(bus_info, CONTROLVM_BUS_CREATE, &inmsg->hdr, rc, inmsg->hdr.flags.response_expected == 1); } @@ -1086,18 +1139,20 @@ static void bus_destroy(struct controlvm_message *inmsg) { struct controlvm_message_packet *cmd = &inmsg->cmd; - ulong bus_no = cmd->destroy_bus.bus_no; - struct visorchipset_bus_info *bus_info; + u32 bus_no = cmd->destroy_bus.bus_no; + struct visor_device *bus_info; int rc = CONTROLVM_RESP_SUCCESS; - bus_info = findbus(&bus_info_list, bus_no); + bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); if (!bus_info) rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; else if (bus_info->state.created == 0) rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; - bus_epilog(bus_no, CONTROLVM_BUS_DESTROY, &inmsg->hdr, + bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr, rc, inmsg->hdr.flags.response_expected == 1); + + /* bus_info is freed as part of the busdevice_release function */ } static void @@ -1105,16 +1160,15 @@ bus_configure(struct controlvm_message *inmsg, struct parser_context *parser_ctx) { struct controlvm_message_packet *cmd = &inmsg->cmd; - ulong bus_no = cmd->configure_bus.bus_no; - struct visorchipset_bus_info *bus_info = NULL; + u32 bus_no; + struct visor_device *bus_info; int rc = CONTROLVM_RESP_SUCCESS; - char s[99]; bus_no = cmd->configure_bus.bus_no; POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); - bus_info = findbus(&bus_info_list, bus_no); + bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); if (!bus_info) { POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, POSTCODE_SEVERITY_ERR); @@ -1123,21 +1177,21 @@ bus_configure(struct controlvm_message *inmsg, POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, POSTCODE_SEVERITY_ERR); rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; - } else if (bus_info->pending_msg_hdr.id != CONTROLVM_INVALID) { + } else if (bus_info->pending_msg_hdr != NULL) { POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, POSTCODE_SEVERITY_ERR); rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; } else { - bus_info->partition_handle = cmd->configure_bus.guest_handle; + visorchannel_set_clientpartition(bus_info->visorchannel, + cmd->configure_bus.guest_handle); bus_info->partition_uuid = parser_id_get(parser_ctx); parser_param_start(parser_ctx, PARSERSTRING_NAME); bus_info->name = parser_string_get(parser_ctx); - visorchannel_uuid_id(&bus_info->partition_uuid, s); POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); } - bus_epilog(bus_no, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, + bus_epilog(bus_info, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, rc, inmsg->hdr.flags.response_expected == 1); } @@ -1145,32 +1199,36 @@ static void my_device_create(struct controlvm_message *inmsg) { struct controlvm_message_packet *cmd = &inmsg->cmd; - ulong bus_no = cmd->create_device.bus_no; - ulong dev_no = cmd->create_device.dev_no; - struct visorchipset_device_info *dev_info = NULL; - struct visorchipset_bus_info *bus_info = NULL; + u32 bus_no = cmd->create_device.bus_no; + u32 dev_no = cmd->create_device.dev_no; + struct visor_device *dev_info = NULL; + struct visor_device *bus_info; + struct visorchannel *visorchannel; int rc = CONTROLVM_RESP_SUCCESS; - dev_info = finddevice(&dev_info_list, bus_no, dev_no); - if (dev_info && (dev_info->state.created == 1)) { + bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); + if (!bus_info) { POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, POSTCODE_SEVERITY_ERR); - rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; + rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; goto cleanup; } - bus_info = findbus(&bus_info_list, bus_no); - if (!bus_info) { + + if (bus_info->state.created == 0) { POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, POSTCODE_SEVERITY_ERR); rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; goto cleanup; } - if (bus_info->state.created == 0) { + + dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); + if (dev_info && (dev_info->state.created == 1)) { POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, POSTCODE_SEVERITY_ERR); - rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; + rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; goto cleanup; } + dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); if (!dev_info) { POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, @@ -1179,49 +1237,50 @@ my_device_create(struct controlvm_message *inmsg) goto cleanup; } - INIT_LIST_HEAD(&dev_info->entry); - dev_info->bus_no = bus_no; - dev_info->dev_no = dev_no; - dev_info->dev_inst_uuid = cmd->create_device.dev_inst_uuid; + dev_info->chipset_bus_no = bus_no; + dev_info->chipset_dev_no = dev_no; + dev_info->inst = cmd->create_device.dev_inst_uuid; + + /* not sure where the best place to set the 'parent' */ + dev_info->device.parent = &bus_info->device; + POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, POSTCODE_SEVERITY_INFO); - if (inmsg->hdr.flags.test_message == 1) - dev_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; - else - dev_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; - dev_info->chan_info.channel_addr = cmd->create_device.channel_addr; - dev_info->chan_info.n_channel_bytes = cmd->create_device.channel_bytes; - dev_info->chan_info.channel_type_uuid = - cmd->create_device.data_type_uuid; - dev_info->chan_info.intr = cmd->create_device.intr; - list_add(&dev_info->entry, &dev_info_list); + visorchannel = visorchannel_create(cmd->create_device.channel_addr, + cmd->create_device.channel_bytes, + GFP_KERNEL, + cmd->create_device.data_type_uuid); + + if (!visorchannel) { + POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; + kfree(dev_info); + dev_info = NULL; + goto cleanup; + } + dev_info->visorchannel = visorchannel; + dev_info->channel_type_guid = cmd->create_device.data_type_uuid; POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, POSTCODE_SEVERITY_INFO); cleanup: - /* get the bus and devNo for DiagPool channel */ - if (dev_info && - is_diagpool_channel(dev_info->chan_info.channel_type_uuid)) { - g_diagpool_bus_no = bus_no; - g_diagpool_dev_no = dev_no; - } - device_epilog(bus_no, dev_no, segment_state_running, + device_epilog(dev_info, segment_state_running, CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, - inmsg->hdr.flags.response_expected == 1, - FOR_VISORBUS(dev_info->chan_info.channel_type_uuid)); + inmsg->hdr.flags.response_expected == 1, 1); } static void my_device_changestate(struct controlvm_message *inmsg) { struct controlvm_message_packet *cmd = &inmsg->cmd; - ulong bus_no = cmd->device_change_state.bus_no; - ulong dev_no = cmd->device_change_state.dev_no; + u32 bus_no = cmd->device_change_state.bus_no; + u32 dev_no = cmd->device_change_state.dev_no; struct spar_segment_state state = cmd->device_change_state.state; - struct visorchipset_device_info *dev_info = NULL; + struct visor_device *dev_info; int rc = CONTROLVM_RESP_SUCCESS; - dev_info = finddevice(&dev_info_list, bus_no, dev_no); + dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); if (!dev_info) { POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, POSTCODE_SEVERITY_ERR); @@ -1232,45 +1291,41 @@ my_device_changestate(struct controlvm_message *inmsg) rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; } if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) - device_epilog(bus_no, dev_no, state, + device_epilog(dev_info, state, CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, - inmsg->hdr.flags.response_expected == 1, - FOR_VISORBUS( - dev_info->chan_info.channel_type_uuid)); + inmsg->hdr.flags.response_expected == 1, 1); } static void my_device_destroy(struct controlvm_message *inmsg) { struct controlvm_message_packet *cmd = &inmsg->cmd; - ulong bus_no = cmd->destroy_device.bus_no; - ulong dev_no = cmd->destroy_device.dev_no; - struct visorchipset_device_info *dev_info = NULL; + u32 bus_no = cmd->destroy_device.bus_no; + u32 dev_no = cmd->destroy_device.dev_no; + struct visor_device *dev_info; int rc = CONTROLVM_RESP_SUCCESS; - dev_info = finddevice(&dev_info_list, bus_no, dev_no); + dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); if (!dev_info) rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; else if (dev_info->state.created == 0) rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) - device_epilog(bus_no, dev_no, segment_state_running, + device_epilog(dev_info, segment_state_running, CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, - inmsg->hdr.flags.response_expected == 1, - FOR_VISORBUS( - dev_info->chan_info.channel_type_uuid)); + inmsg->hdr.flags.response_expected == 1, 1); } /* When provided with the physical address of the controlvm channel * (phys_addr), the offset to the payload area we need to manage * (offset), and the size of this payload area (bytes), fills in the - * controlvm_payload_info struct. Returns TRUE for success or FALSE + * controlvm_payload_info struct. Returns true for success or false * for failure. */ static int -initialize_controlvm_payload_info(HOSTADDRESS phys_addr, u64 offset, u32 bytes, - struct controlvm_payload_info *info) +initialize_controlvm_payload_info(u64 phys_addr, u64 offset, u32 bytes, + struct visor_controlvm_payload_info *info) { u8 __iomem *payload = NULL; int rc = CONTROLVM_RESP_SUCCESS; @@ -1279,7 +1334,7 @@ initialize_controlvm_payload_info(HOSTADDRESS phys_addr, u64 offset, u32 bytes, rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; goto cleanup; } - memset(info, 0, sizeof(struct controlvm_payload_info)); + memset(info, 0, sizeof(struct visor_controlvm_payload_info)); if ((offset == 0) || (bytes == 0)) { rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; goto cleanup; @@ -1305,19 +1360,19 @@ cleanup: } static void -destroy_controlvm_payload_info(struct controlvm_payload_info *info) +destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) { if (info->ptr) { iounmap(info->ptr); info->ptr = NULL; } - memset(info, 0, sizeof(struct controlvm_payload_info)); + memset(info, 0, sizeof(struct visor_controlvm_payload_info)); } static void initialize_controlvm_payload(void) { - HOSTADDRESS phys_addr = visorchannel_get_physaddr(controlvm_channel); + u64 phys_addr = visorchannel_get_physaddr(controlvm_channel); u64 payload_offset = 0; u32 payload_bytes = 0; @@ -1345,15 +1400,14 @@ initialize_controlvm_payload(void) /* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. * Returns CONTROLVM_RESP_xxx code. */ -int +static int visorchipset_chipset_ready(void) { kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); return CONTROLVM_RESP_SUCCESS; } -EXPORT_SYMBOL_GPL(visorchipset_chipset_ready); -int +static int visorchipset_chipset_selftest(void) { char env_selftest[20]; @@ -1364,18 +1418,16 @@ visorchipset_chipset_selftest(void) envp); return CONTROLVM_RESP_SUCCESS; } -EXPORT_SYMBOL_GPL(visorchipset_chipset_selftest); /* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. * Returns CONTROLVM_RESP_xxx code. */ -int +static int visorchipset_chipset_notready(void) { kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); return CONTROLVM_RESP_SUCCESS; } -EXPORT_SYMBOL_GPL(visorchipset_chipset_notready); static void chipset_ready(struct controlvm_message_header *msg_hdr) @@ -1419,17 +1471,17 @@ chipset_notready(struct controlvm_message_header *msg_hdr) /* This is your "one-stop" shop for grabbing the next message from the * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. */ -static BOOL +static bool read_controlvm_event(struct controlvm_message *msg) { if (visorchannel_signalremove(controlvm_channel, CONTROLVM_QUEUE_EVENT, msg)) { /* got a message */ if (msg->hdr.flags.test_message == 1) - return FALSE; - return TRUE; + return false; + return true; } - return FALSE; + return false; } /* @@ -1535,8 +1587,8 @@ parahotplug_request_kickoff(struct parahotplug_request *req) static void parahotplug_process_list(void) { - struct list_head *pos = NULL; - struct list_head *tmp = NULL; + struct list_head *pos; + struct list_head *tmp; spin_lock(¶hotplug_request_list_lock); @@ -1567,8 +1619,8 @@ parahotplug_process_list(void) static int parahotplug_request_complete(int id, u16 active) { - struct list_head *pos = NULL; - struct list_head *tmp = NULL; + struct list_head *pos; + struct list_head *tmp; spin_lock(¶hotplug_request_list_lock); @@ -1640,29 +1692,29 @@ parahotplug_process_message(struct controlvm_message *inmsg) /* Process a controlvm message. * Return result: - * FALSE - this function will return FALSE only in the case where the + * false - this function will return false only in the case where the * controlvm message was NOT processed, but processing must be * retried before reading the next controlvm message; a * scenario where this can occur is when we need to throttle * the allocation of memory in which to copy out controlvm * payload data - * TRUE - processing of the controlvm message completed, + * true - processing of the controlvm message completed, * either successfully or with an error. */ -static BOOL -handle_command(struct controlvm_message inmsg, HOSTADDRESS channel_addr) +static bool +handle_command(struct controlvm_message inmsg, u64 channel_addr) { struct controlvm_message_packet *cmd = &inmsg.cmd; - u64 parm_addr = 0; - u32 parm_bytes = 0; + u64 parm_addr; + u32 parm_bytes; struct parser_context *parser_ctx = NULL; - bool local_addr = false; + bool local_addr; struct controlvm_message ackmsg; /* create parsing context if necessary */ local_addr = (inmsg.hdr.flags.test_message == 1); if (channel_addr == 0) - return TRUE; + return true; parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; parm_bytes = inmsg.hdr.payload_bytes; @@ -1670,14 +1722,14 @@ handle_command(struct controlvm_message inmsg, HOSTADDRESS channel_addr) * within our OS-controlled memory. We need to know that, because it * makes a difference in how we compute the virtual address. */ - if (parm_addr != 0 && parm_bytes != 0) { - BOOL retry = FALSE; + if (parm_addr && parm_bytes) { + bool retry = false; parser_ctx = parser_init_byte_stream(parm_addr, parm_bytes, local_addr, &retry); if (!parser_ctx && retry) - return FALSE; + return false; } if (!local_addr) { @@ -1711,7 +1763,6 @@ handle_command(struct controlvm_message inmsg, HOSTADDRESS channel_addr) /* save the hdr and cmd structures for later use */ /* when sending back the response to Command */ my_device_changestate(&inmsg); - g_diag_msg_hdr = inmsg.hdr; g_devicechangestate_packet = inmsg.cmd; break; } @@ -1744,10 +1795,26 @@ handle_command(struct controlvm_message inmsg, HOSTADDRESS channel_addr) parser_done(parser_ctx); parser_ctx = NULL; } - return TRUE; + return true; } -static HOSTADDRESS controlvm_get_channel_address(void) +static inline unsigned int +issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) +{ + struct vmcall_io_controlvm_addr_params params; + int result = VMCALL_SUCCESS; + u64 physaddr; + + physaddr = virt_to_phys(¶ms); + ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result); + if (VMCALL_SUCCESSFUL(result)) { + *control_addr = params.address; + *control_bytes = params.channel_bytes; + } + return result; +} + +static u64 controlvm_get_channel_address(void) { u64 addr = 0; u32 size = 0; @@ -1762,17 +1829,12 @@ static void controlvm_periodic_work(struct work_struct *work) { struct controlvm_message inmsg; - BOOL got_command = FALSE; - BOOL handle_command_failed = FALSE; + bool got_command = false; + bool handle_command_failed = false; static u64 poll_count; /* make sure visorbus server is registered for controlvm callbacks */ - if (visorchipset_serverregwait && !serverregistered) - goto cleanup; - /* make sure visorclientbus server is regsitered for controlvm - * callbacks - */ - if (visorchipset_clientregwait && !clientregistered) + if (visorchipset_visorbusregwait && !visorbusregistered) goto cleanup; poll_count++; @@ -1805,14 +1867,14 @@ controlvm_periodic_work(struct work_struct *work) * rather than reading a new one */ inmsg = controlvm_pending_msg; - controlvm_pending_msg_valid = FALSE; + controlvm_pending_msg_valid = false; got_command = true; } else { got_command = read_controlvm_event(&inmsg); } } - handle_command_failed = FALSE; + handle_command_failed = false; while (got_command && (!handle_command_failed)) { most_recent_message_jiffies = jiffies; if (handle_command(inmsg, @@ -1826,9 +1888,9 @@ controlvm_periodic_work(struct work_struct *work) * controlvm msg so we will attempt to * reprocess it on our next loop */ - handle_command_failed = TRUE; + handle_command_failed = true; controlvm_pending_msg = inmsg; - controlvm_pending_msg_valid = TRUE; + controlvm_pending_msg_valid = true; } } @@ -1863,14 +1925,8 @@ setup_crash_devices_work_queue(struct work_struct *work) u32 local_crash_msg_offset; u16 local_crash_msg_count; - /* make sure visorbus server is registered for controlvm callbacks */ - if (visorchipset_serverregwait && !serverregistered) - goto cleanup; - - /* make sure visorclientbus server is regsitered for controlvm - * callbacks - */ - if (visorchipset_clientregwait && !clientregistered) + /* make sure visorbus is registered for controlvm callbacks */ + if (visorchipset_visorbusregwait && !visorbusregistered) goto cleanup; POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); @@ -1931,7 +1987,7 @@ setup_crash_devices_work_queue(struct work_struct *work) } /* reuse IOVM create bus message */ - if (local_crash_bus_msg.cmd.create_bus.channel_addr != 0) { + if (local_crash_bus_msg.cmd.create_bus.channel_addr) { bus_create(&local_crash_bus_msg); } else { POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, @@ -1940,7 +1996,7 @@ setup_crash_devices_work_queue(struct work_struct *work) } /* reuse create device message for storage device */ - if (local_crash_dev_msg.cmd.create_device.channel_addr != 0) { + if (local_crash_dev_msg.cmd.create_device.channel_addr) { my_device_create(&local_crash_dev_msg); } else { POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, @@ -1959,135 +2015,71 @@ cleanup: } static void -bus_create_response(ulong bus_no, int response) +bus_create_response(struct visor_device *bus_info, int response) { - bus_responder(CONTROLVM_BUS_CREATE, bus_no, response); -} + if (response >= 0) + bus_info->state.created = 1; -static void -bus_destroy_response(ulong bus_no, int response) -{ - bus_responder(CONTROLVM_BUS_DESTROY, bus_no, response); -} + bus_responder(CONTROLVM_BUS_CREATE, bus_info->pending_msg_hdr, + response); -static void -device_create_response(ulong bus_no, ulong dev_no, int response) -{ - device_responder(CONTROLVM_DEVICE_CREATE, bus_no, dev_no, response); + kfree(bus_info->pending_msg_hdr); + bus_info->pending_msg_hdr = NULL; } static void -device_destroy_response(ulong bus_no, ulong dev_no, int response) +bus_destroy_response(struct visor_device *bus_info, int response) { - device_responder(CONTROLVM_DEVICE_DESTROY, bus_no, dev_no, response); -} + bus_responder(CONTROLVM_BUS_DESTROY, bus_info->pending_msg_hdr, + response); -void -visorchipset_device_pause_response(ulong bus_no, ulong dev_no, int response) -{ - device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, - bus_no, dev_no, response, - segment_state_standby); + kfree(bus_info->pending_msg_hdr); + bus_info->pending_msg_hdr = NULL; } -EXPORT_SYMBOL_GPL(visorchipset_device_pause_response); static void -device_resume_response(ulong bus_no, ulong dev_no, int response) -{ - device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, - bus_no, dev_no, response, - segment_state_running); -} - -BOOL -visorchipset_get_bus_info(ulong bus_no, struct visorchipset_bus_info *bus_info) -{ - void *p = findbus(&bus_info_list, bus_no); - - if (!p) - return FALSE; - memcpy(bus_info, p, sizeof(struct visorchipset_bus_info)); - return TRUE; -} -EXPORT_SYMBOL_GPL(visorchipset_get_bus_info); - -BOOL -visorchipset_set_bus_context(ulong bus_no, void *context) +device_create_response(struct visor_device *dev_info, int response) { - struct visorchipset_bus_info *p = findbus(&bus_info_list, bus_no); - - if (!p) - return FALSE; - p->bus_driver_context = context; - return TRUE; -} -EXPORT_SYMBOL_GPL(visorchipset_set_bus_context); + if (response >= 0) + dev_info->state.created = 1; -BOOL -visorchipset_get_device_info(ulong bus_no, ulong dev_no, - struct visorchipset_device_info *dev_info) -{ - void *p = finddevice(&dev_info_list, bus_no, dev_no); + device_responder(CONTROLVM_DEVICE_CREATE, dev_info->pending_msg_hdr, + response); - if (!p) - return FALSE; - memcpy(dev_info, p, sizeof(struct visorchipset_device_info)); - return TRUE; + kfree(dev_info->pending_msg_hdr); } -EXPORT_SYMBOL_GPL(visorchipset_get_device_info); -BOOL -visorchipset_set_device_context(ulong bus_no, ulong dev_no, void *context) +static void +device_destroy_response(struct visor_device *dev_info, int response) { - struct visorchipset_device_info *p = - finddevice(&dev_info_list, bus_no, dev_no); + device_responder(CONTROLVM_DEVICE_DESTROY, dev_info->pending_msg_hdr, + response); - if (!p) - return FALSE; - p->bus_driver_context = context; - return TRUE; + kfree(dev_info->pending_msg_hdr); + dev_info->pending_msg_hdr = NULL; } -EXPORT_SYMBOL_GPL(visorchipset_set_device_context); -/* Generic wrapper function for allocating memory from a kmem_cache pool. - */ -void * -visorchipset_cache_alloc(struct kmem_cache *pool, BOOL ok_to_block, - char *fn, int ln) +static void +visorchipset_device_pause_response(struct visor_device *dev_info, + int response) { - gfp_t gfp; - void *p; - - if (ok_to_block) - gfp = GFP_KERNEL; - else - gfp = GFP_ATOMIC; - /* __GFP_NORETRY means "ok to fail", meaning - * kmem_cache_alloc() can return NULL, implying the caller CAN - * cope with failure. If you do NOT specify __GFP_NORETRY, - * Linux will go to extreme measures to get memory for you - * (like, invoke oom killer), which will probably cripple the - * system. - */ - gfp |= __GFP_NORETRY; - p = kmem_cache_alloc(pool, gfp); - if (!p) - return NULL; + device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, + dev_info, response, + segment_state_standby); - atomic_inc(&visorchipset_cache_buffers_in_use); - return p; + kfree(dev_info->pending_msg_hdr); + dev_info->pending_msg_hdr = NULL; } -/* Generic wrapper function for freeing memory from a kmem_cache pool. - */ -void -visorchipset_cache_free(struct kmem_cache *pool, void *p, char *fn, int ln) +static void +device_resume_response(struct visor_device *dev_info, int response) { - if (!p) - return; + device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, + dev_info, response, + segment_state_running); - atomic_dec(&visorchipset_cache_buffers_in_use); - kmem_cache_free(pool, p); + kfree(dev_info->pending_msg_hdr); + dev_info->pending_msg_hdr = NULL; } static ssize_t chipsetready_store(struct device *dev, @@ -2099,10 +2091,10 @@ static ssize_t chipsetready_store(struct device *dev, if (sscanf(buf, "%63s", msgtype) != 1) return -EINVAL; - if (strcmp(msgtype, "CALLHOMEDISK_MOUNTED") == 0) { + if (!strcmp(msgtype, "CALLHOMEDISK_MOUNTED")) { chipset_events[0] = 1; return count; - } else if (strcmp(msgtype, "MODULES_LOADED") == 0) { + } else if (!strcmp(msgtype, "MODULES_LOADED")) { chipset_events[1] = 1; return count; } @@ -2117,9 +2109,9 @@ static ssize_t devicedisabled_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - uint id; + unsigned int id; - if (kstrtouint(buf, 10, &id) != 0) + if (kstrtouint(buf, 10, &id)) return -EINVAL; parahotplug_request_complete(id, 0); @@ -2134,52 +2126,158 @@ static ssize_t deviceenabled_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - uint id; + unsigned int id; - if (kstrtouint(buf, 10, &id) != 0) + if (kstrtouint(buf, 10, &id)) return -EINVAL; parahotplug_request_complete(id, 1); return count; } -static int __init -visorchipset_init(void) +static int +visorchipset_mmap(struct file *file, struct vm_area_struct *vma) { - int rc = 0, x = 0; - HOSTADDRESS addr; + unsigned long physaddr = 0; + unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; + u64 addr = 0; - if (!unisys_spar_platform) - return -ENODEV; + /* sv_enable_dfp(); */ + if (offset & (PAGE_SIZE - 1)) + return -ENXIO; /* need aligned offsets */ - memset(&busdev_server_notifiers, 0, sizeof(busdev_server_notifiers)); - memset(&busdev_client_notifiers, 0, sizeof(busdev_client_notifiers)); - memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); - memset(&livedump_info, 0, sizeof(livedump_info)); - atomic_set(&livedump_info.buffers_in_use, 0); + switch (offset) { + case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: + vma->vm_flags |= VM_IO; + if (!*file_controlvm_channel) + return -ENXIO; - if (visorchipset_testvnic) { - POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, x, DIAG_SEVERITY_ERR); - rc = x; - goto cleanup; + visorchannel_read(*file_controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + gp_control_channel), + &addr, sizeof(addr)); + if (!addr) + return -ENXIO; + + physaddr = (unsigned long)addr; + if (remap_pfn_range(vma, vma->vm_start, + physaddr >> PAGE_SHIFT, + vma->vm_end - vma->vm_start, + /*pgprot_noncached */ + (vma->vm_page_prot))) { + return -EAGAIN; + } + break; + default: + return -ENXIO; } + return 0; +} - addr = controlvm_get_channel_address(); - if (addr != 0) { - controlvm_channel = - visorchannel_create_with_lock - (addr, - sizeof(struct spar_controlvm_channel_protocol), - spar_controlvm_channel_protocol_uuid); - if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( - visorchannel_get_header(controlvm_channel))) { - initialize_controlvm_payload(); - } else { - visorchannel_destroy(controlvm_channel); - controlvm_channel = NULL; - return -ENODEV; +static inline s64 issue_vmcall_query_guest_virtual_time_offset(void) +{ + u64 result = VMCALL_SUCCESS; + u64 physaddr = 0; + + ISSUE_IO_VMCALL(VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET, physaddr, + result); + return result; +} + +static inline int issue_vmcall_update_physical_time(u64 adjustment) +{ + int result = VMCALL_SUCCESS; + + ISSUE_IO_VMCALL(VMCALL_UPDATE_PHYSICAL_TIME, adjustment, result); + return result; +} + +static long visorchipset_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + s64 adjustment; + s64 vrtc_offset; + + switch (cmd) { + case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: + /* get the physical rtc offset */ + vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); + if (copy_to_user((void __user *)arg, &vrtc_offset, + sizeof(vrtc_offset))) { + return -EFAULT; + } + return 0; + case VMCALL_UPDATE_PHYSICAL_TIME: + if (copy_from_user(&adjustment, (void __user *)arg, + sizeof(adjustment))) { + return -EFAULT; } + return issue_vmcall_update_physical_time(adjustment); + default: + return -EFAULT; + } +} + +static const struct file_operations visorchipset_fops = { + .owner = THIS_MODULE, + .open = visorchipset_open, + .read = NULL, + .write = NULL, + .unlocked_ioctl = visorchipset_ioctl, + .release = visorchipset_release, + .mmap = visorchipset_mmap, +}; + +static int +visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) +{ + int rc = 0; + + file_controlvm_channel = controlvm_channel; + cdev_init(&file_cdev, &visorchipset_fops); + file_cdev.owner = THIS_MODULE; + if (MAJOR(major_dev) == 0) { + rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); + /* dynamic major device number registration required */ + if (rc < 0) + return rc; + } else { + /* static major device number registration required */ + rc = register_chrdev_region(major_dev, 1, "visorchipset"); + if (rc < 0) + return rc; + } + rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); + if (rc < 0) { + unregister_chrdev_region(major_dev, 1); + return rc; + } + return 0; +} + +static int +visorchipset_init(struct acpi_device *acpi_device) +{ + int rc = 0; + u64 addr; + int tmp_sz = sizeof(struct spar_controlvm_channel_protocol); + uuid_le uuid = SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; + + addr = controlvm_get_channel_address(); + if (!addr) + return -ENODEV; + + memset(&busdev_notifiers, 0, sizeof(busdev_notifiers)); + memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); + + controlvm_channel = visorchannel_create_with_lock(addr, tmp_sz, + GFP_KERNEL, uuid); + if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( + visorchannel_get_header(controlvm_channel))) { + initialize_controlvm_payload(); } else { + visorchannel_destroy(controlvm_channel); + controlvm_channel = NULL; return -ENODEV; } @@ -2190,47 +2288,32 @@ visorchipset_init(void) goto cleanup; } - memset(&g_diag_msg_hdr, 0, sizeof(struct controlvm_message_header)); - memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); - memset(&g_del_dump_msg_hdr, 0, sizeof(struct controlvm_message_header)); - - putfile_buffer_list_pool = - kmem_cache_create(putfile_buffer_list_pool_name, - sizeof(struct putfile_buffer_entry), - 0, SLAB_HWCACHE_ALIGN, NULL); - if (!putfile_buffer_list_pool) { - POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); - rc = -1; + /* if booting in a crash kernel */ + if (is_kdump_kernel()) + INIT_DELAYED_WORK(&periodic_controlvm_work, + setup_crash_devices_work_queue); + else + INIT_DELAYED_WORK(&periodic_controlvm_work, + controlvm_periodic_work); + periodic_controlvm_workqueue = + create_singlethread_workqueue("visorchipset_controlvm"); + + if (!periodic_controlvm_workqueue) { + POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC, + DIAG_SEVERITY_ERR); + rc = -ENOMEM; goto cleanup; } - if (!visorchipset_disable_controlvm) { - /* if booting in a crash kernel */ - if (visorchipset_crash_kernel) - INIT_DELAYED_WORK(&periodic_controlvm_work, - setup_crash_devices_work_queue); - else - INIT_DELAYED_WORK(&periodic_controlvm_work, - controlvm_periodic_work); - periodic_controlvm_workqueue = - create_singlethread_workqueue("visorchipset_controlvm"); - - if (!periodic_controlvm_workqueue) { - POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC, - DIAG_SEVERITY_ERR); - rc = -ENOMEM; - goto cleanup; - } - most_recent_message_jiffies = jiffies; - poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; - rc = queue_delayed_work(periodic_controlvm_workqueue, - &periodic_controlvm_work, poll_jiffies); - if (rc < 0) { - POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC, - DIAG_SEVERITY_ERR); - goto cleanup; - } + most_recent_message_jiffies = jiffies; + poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; + rc = queue_delayed_work(periodic_controlvm_workqueue, + &periodic_controlvm_work, poll_jiffies); + if (rc < 0) { + POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC, + DIAG_SEVERITY_ERR); + goto cleanup; } visorchipset_platform_device.dev.devt = major_dev; @@ -2240,7 +2323,8 @@ visorchipset_init(void) goto cleanup; } POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); - rc = 0; + + rc = visorbus_init(); cleanup: if (rc) { POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, @@ -2250,83 +2334,101 @@ cleanup: } static void -visorchipset_exit(void) +visorchipset_file_cleanup(dev_t major_dev) { - POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); + if (file_cdev.ops) + cdev_del(&file_cdev); + file_cdev.ops = NULL; + unregister_chrdev_region(major_dev, 1); +} - if (visorchipset_disable_controlvm) { - ; - } else { - cancel_delayed_work(&periodic_controlvm_work); - flush_workqueue(periodic_controlvm_workqueue); - destroy_workqueue(periodic_controlvm_workqueue); - periodic_controlvm_workqueue = NULL; - destroy_controlvm_payload_info(&controlvm_payload_info); - } - if (putfile_buffer_list_pool) { - kmem_cache_destroy(putfile_buffer_list_pool); - putfile_buffer_list_pool = NULL; - } +static int +visorchipset_exit(struct acpi_device *acpi_device) +{ + POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); - cleanup_controlvm_structures(); + visorbus_exit(); - memset(&g_diag_msg_hdr, 0, sizeof(struct controlvm_message_header)); + cancel_delayed_work(&periodic_controlvm_work); + flush_workqueue(periodic_controlvm_workqueue); + destroy_workqueue(periodic_controlvm_workqueue); + periodic_controlvm_workqueue = NULL; + destroy_controlvm_payload_info(&controlvm_payload_info); memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); - memset(&g_del_dump_msg_hdr, 0, sizeof(struct controlvm_message_header)); - visorchannel_destroy(controlvm_channel); visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); + platform_device_unregister(&visorchipset_platform_device); POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); + + return 0; } -module_param_named(testvnic, visorchipset_testvnic, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_testvnic, "1 to test vnic, using dummy VNIC connected via a loopback to a physical ethernet"); -int visorchipset_testvnic = 0; +static const struct acpi_device_id unisys_device_ids[] = { + {"PNP0A07", 0}, + {"", 0}, +}; -module_param_named(testvnicclient, visorchipset_testvnicclient, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_testvnicclient, "1 to test vnic, using real VNIC channel attached to a separate IOVM guest"); -int visorchipset_testvnicclient = 0; +static struct acpi_driver unisys_acpi_driver = { + .name = "unisys_acpi", + .class = "unisys_acpi_class", + .owner = THIS_MODULE, + .ids = unisys_device_ids, + .ops = { + .add = visorchipset_init, + .remove = visorchipset_exit, + }, +}; +static __init uint32_t visorutil_spar_detect(void) +{ + unsigned int eax, ebx, ecx, edx; -module_param_named(testmsg, visorchipset_testmsg, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_testmsg, - "1 to manufacture the chipset, bus, and switch messages"); -int visorchipset_testmsg = 0; + if (cpu_has_hypervisor) { + /* check the ID */ + cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); + return (ebx == UNISYS_SPAR_ID_EBX) && + (ecx == UNISYS_SPAR_ID_ECX) && + (edx == UNISYS_SPAR_ID_EDX); + } else { + return 0; + } +} -module_param_named(major, visorchipset_major, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_major, "major device number to use for the device node"); -int visorchipset_major = 0; +static int init_unisys(void) +{ + int result; + + if (!visorutil_spar_detect()) + return -ENODEV; + + result = acpi_bus_register_driver(&unisys_acpi_driver); + if (result) + return -ENODEV; + + pr_info("Unisys Visorchipset Driver Loaded.\n"); + return 0; +}; + +static void exit_unisys(void) +{ + acpi_bus_unregister_driver(&unisys_acpi_driver); +} -module_param_named(serverregwait, visorchipset_serverregwait, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_serverreqwait, +module_param_named(major, visorchipset_major, int, S_IRUGO); +MODULE_PARM_DESC(visorchipset_major, + "major device number to use for the device node"); +module_param_named(visorbusregwait, visorchipset_visorbusregwait, int, S_IRUGO); +MODULE_PARM_DESC(visorchipset_visorbusreqwait, "1 to have the module wait for the visor bus to register"); -int visorchipset_serverregwait = 0; /* default is off */ -module_param_named(clientregwait, visorchipset_clientregwait, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_clientregwait, "1 to have the module wait for the visorclientbus to register"); -int visorchipset_clientregwait = 1; /* default is on */ -module_param_named(testteardown, visorchipset_testteardown, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_testteardown, - "1 to test teardown of the chipset, bus, and switch"); -int visorchipset_testteardown = 0; /* default is off */ -module_param_named(disable_controlvm, visorchipset_disable_controlvm, int, - S_IRUGO); -MODULE_PARM_DESC(visorchipset_disable_controlvm, - "1 to disable polling of controlVm channel"); -int visorchipset_disable_controlvm = 0; /* default is off */ -module_param_named(crash_kernel, visorchipset_crash_kernel, int, S_IRUGO); -MODULE_PARM_DESC(visorchipset_crash_kernel, - "1 means we are running in crash kernel"); -int visorchipset_crash_kernel = 0; /* default is running in non-crash kernel */ module_param_named(holdchipsetready, visorchipset_holdchipsetready, int, S_IRUGO); MODULE_PARM_DESC(visorchipset_holdchipsetready, "1 to hold response to CHIPSET_READY"); -int visorchipset_holdchipsetready = 0; /* default is to send CHIPSET_READY - * response immediately */ -module_init(visorchipset_init); -module_exit(visorchipset_exit); + +module_init(init_unisys); +module_exit(exit_unisys); MODULE_AUTHOR("Unisys"); MODULE_LICENSE("GPL"); diff --git a/drivers/staging/unisys/common-spar/include/vmcallinterface.h b/drivers/staging/unisys/visorbus/vmcallinterface.h index 59a7459eb..7a53df007 100644 --- a/drivers/staging/unisys/common-spar/include/vmcallinterface.h +++ b/drivers/staging/unisys/visorbus/vmcallinterface.h @@ -85,10 +85,8 @@ enum vmcall_monitor_interface_method_tuple { /* VMCALL identification tuples */ /* The following uses VMCALL_POST_CODE_LOGEVENT interface but is currently * not used much */ #define ISSUE_IO_VMCALL_POSTCODE_SEVERITY(postcode, severity) \ -do { \ ISSUE_IO_EXTENDED_VMCALL(VMCALL_POST_CODE_LOGEVENT, severity, \ - MDS_APPOS, postcode); \ -} while (0) + MDS_APPOS, postcode) #endif /* Structures for IO VMCALLs */ @@ -96,18 +94,6 @@ do { \ /* ///////////// BEGIN PRAGMA PACK PUSH 1 ///////////////////////// */ /* ///////////// ONLY STRUCT TYPE SHOULD BE BELOW */ #pragma pack(push, 1) -struct phys_info { - u64 pi_pfn; - u16 pi_off; - u16 pi_len; -}; - -#pragma pack(pop) -/* ///////////// END PRAGMA PACK PUSH 1 /////////////////////////// */ - -/* ///////////// BEGIN PRAGMA PACK PUSH 1 ///////////////////////// */ -/* ///////////// ONLY STRUCT TYPE SHOULD BE BELOW */ -#pragma pack(push, 1) /* Parameters to VMCALL_IO_CONTROLVM_ADDR interface */ struct vmcall_io_controlvm_addr_params { /* The Guest-relative physical address of the ControlVm channel. diff --git a/drivers/staging/unisys/visorchannel/Kconfig b/drivers/staging/unisys/visorchannel/Kconfig deleted file mode 100644 index 8d31bebf0..000000000 --- a/drivers/staging/unisys/visorchannel/Kconfig +++ /dev/null @@ -1,10 +0,0 @@ -# -# Unisys visorchannel configuration -# - -config UNISYS_VISORCHANNEL - tristate "Unisys visorchannel driver" - select UNISYS_VISORUTIL - ---help--- - If you say Y here, you will enable the Unisys visorchannel driver. - diff --git a/drivers/staging/unisys/visorchannel/Makefile b/drivers/staging/unisys/visorchannel/Makefile deleted file mode 100644 index e079c96b1..000000000 --- a/drivers/staging/unisys/visorchannel/Makefile +++ /dev/null @@ -1,12 +0,0 @@ -# -# Makefile for Unisys visorchannel -# - -obj-$(CONFIG_UNISYS_VISORCHANNEL) += visorchannel.o - -visorchannel-y := visorchannel_main.o visorchannel_funcs.o - -ccflags-y += -Idrivers/staging/unisys/include -ccflags-y += -Idrivers/staging/unisys/common-spar/include -ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels -ccflags-y += -Idrivers/staging/unisys/visorutil diff --git a/drivers/staging/unisys/visorchannel/globals.h b/drivers/staging/unisys/visorchannel/globals.h deleted file mode 100644 index 0ed8e1d80..000000000 --- a/drivers/staging/unisys/visorchannel/globals.h +++ /dev/null @@ -1,27 +0,0 @@ -/* globals.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __VISORCHANNEL_GLOBALS_H__ -#define __VISORCHANNEL_GLOBALS_H__ - -#include "timskmod.h" -#include "memregion.h" -#include "version.h" - -#define MYDRVNAME "visorchannel" - -#endif diff --git a/drivers/staging/unisys/visorchannel/visorchannel.h b/drivers/staging/unisys/visorchannel/visorchannel.h deleted file mode 100644 index 63f1b9760..000000000 --- a/drivers/staging/unisys/visorchannel/visorchannel.h +++ /dev/null @@ -1,76 +0,0 @@ -/* visorchannel.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __VISORCHANNEL_H__ -#define __VISORCHANNEL_H__ - -#include <linux/uuid.h> - -#include "memregion.h" -#include "channel.h" -#ifndef HOSTADDRESS -#define HOSTADDRESS u64 -#endif -#ifndef BOOL -#define BOOL int -#endif - -/* Note that for visorchannel_create() and visorchannel_create_overlapped(), - * <channel_bytes> and <guid> arguments may be 0 if we are a channel CLIENT. - * In this case, the values can simply be read from the channel header. - */ -struct visorchannel *visorchannel_create(HOSTADDRESS physaddr, - ulong channel_bytes, uuid_le guid); -struct visorchannel *visorchannel_create_overlapped(ulong channel_bytes, - struct visorchannel *parent, - ulong off, uuid_le guid); -struct visorchannel *visorchannel_create_with_lock(HOSTADDRESS physaddr, - ulong channel_bytes, - uuid_le guid); -struct visorchannel *visorchannel_create_overlapped_with_lock( - ulong channel_bytes, - struct visorchannel *parent, - ulong off, uuid_le guid); -void visorchannel_destroy(struct visorchannel *channel); -int visorchannel_read(struct visorchannel *channel, ulong offset, - void *local, ulong nbytes); -int visorchannel_write(struct visorchannel *channel, ulong offset, - void *local, ulong nbytes); -int visorchannel_clear(struct visorchannel *channel, ulong offset, - u8 ch, ulong nbytes); -BOOL visorchannel_signalremove(struct visorchannel *channel, u32 queue, - void *msg); -BOOL visorchannel_signalinsert(struct visorchannel *channel, u32 queue, - void *msg); -int visorchannel_signalqueue_slots_avail(struct visorchannel *channel, - u32 queue); -int visorchannel_signalqueue_max_slots(struct visorchannel *channel, u32 queue); -HOSTADDRESS visorchannel_get_physaddr(struct visorchannel *channel); -ulong visorchannel_get_nbytes(struct visorchannel *channel); -char *visorchannel_id(struct visorchannel *channel, char *s); -char *visorchannel_zoneid(struct visorchannel *channel, char *s); -u64 visorchannel_get_clientpartition(struct visorchannel *channel); -uuid_le visorchannel_get_uuid(struct visorchannel *channel); -struct memregion *visorchannel_get_memregion(struct visorchannel *channel); -char *visorchannel_uuid_id(uuid_le *guid, char *s); -void visorchannel_debug(struct visorchannel *channel, int num_queues, - struct seq_file *seq, u32 off); -void visorchannel_dump_section(struct visorchannel *chan, char *s, - int off, int len, struct seq_file *seq); -void __iomem *visorchannel_get_header(struct visorchannel *channel); - -#endif diff --git a/drivers/staging/unisys/visorchannel/visorchannel_main.c b/drivers/staging/unisys/visorchannel/visorchannel_main.c deleted file mode 100644 index 787d4774b..000000000 --- a/drivers/staging/unisys/visorchannel/visorchannel_main.c +++ /dev/null @@ -1,50 +0,0 @@ -/* visorchannel_main.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * This is a module "wrapper" around visorchannel_funcs. - */ - -#include "globals.h" -#include "channel.h" -#include "visorchannel.h" -#include <linux/uuid.h> - -#define MYDRVNAME "visorchannel" - -static int __init -visorchannel_init(void) -{ - if (!unisys_spar_platform) - return -ENODEV; - - return 0; -} - -static void -visorchannel_exit(void) -{ -} - -module_init(visorchannel_init); -module_exit(visorchannel_exit); - -MODULE_AUTHOR("Unisys"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Supervisor channel driver for service partition: ver " - VERSION); -MODULE_VERSION(VERSION); diff --git a/drivers/staging/unisys/visorchipset/Kconfig b/drivers/staging/unisys/visorchipset/Kconfig deleted file mode 100644 index b03bfc5c3..000000000 --- a/drivers/staging/unisys/visorchipset/Kconfig +++ /dev/null @@ -1,11 +0,0 @@ -# -# Unisys visorchipset configuration -# - -config UNISYS_VISORCHIPSET - tristate "Unisys visorchipset driver" - select UNISYS_VISORUTIL - select UNISYS_VISORCHANNEL - ---help--- - If you say Y here, you will enable the Unisys visorchipset driver. - diff --git a/drivers/staging/unisys/visorchipset/Makefile b/drivers/staging/unisys/visorchipset/Makefile deleted file mode 100644 index 12686906b..000000000 --- a/drivers/staging/unisys/visorchipset/Makefile +++ /dev/null @@ -1,15 +0,0 @@ -# -# Makefile for Unisys visorchipset -# - -obj-$(CONFIG_UNISYS_VISORCHIPSET) += visorchipset.o - -visorchipset-y := visorchipset_main.o file.o parser.o - -ccflags-y += -Idrivers/staging/unisys/include -ccflags-y += -Idrivers/staging/unisys/uislib -ccflags-y += -Idrivers/staging/unisys/visorchannel -ccflags-y += -Idrivers/staging/unisys/common-spar/include -ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels -ccflags-y += -Idrivers/staging/unisys/visorutil -ccflags-y += -Iinclude/generated diff --git a/drivers/staging/unisys/visorchipset/file.c b/drivers/staging/unisys/visorchipset/file.c deleted file mode 100644 index 203de0b5f..000000000 --- a/drivers/staging/unisys/visorchipset/file.c +++ /dev/null @@ -1,160 +0,0 @@ -/* file.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* This contains the implementation that allows a usermode program to - * communicate with the visorchipset driver using a device/file interface. - */ - -#include "globals.h" -#include "visorchannel.h" -#include <linux/mm.h> -#include <linux/fs.h> -#include "uisutils.h" -#include "file.h" - -#define CURRENT_FILE_PC VISOR_CHIPSET_PC_file_c - -static struct cdev file_cdev; -static struct visorchannel **file_controlvm_channel; - -void -visorchipset_file_cleanup(dev_t major_dev) -{ - if (file_cdev.ops != NULL) - cdev_del(&file_cdev); - file_cdev.ops = NULL; - unregister_chrdev_region(major_dev, 1); -} - -static int -visorchipset_open(struct inode *inode, struct file *file) -{ - unsigned minor_number = iminor(inode); - - if (minor_number != 0) - return -ENODEV; - file->private_data = NULL; - return 0; -} - -static int -visorchipset_release(struct inode *inode, struct file *file) -{ - return 0; -} - -static int -visorchipset_mmap(struct file *file, struct vm_area_struct *vma) -{ - ulong physaddr = 0; - ulong offset = vma->vm_pgoff << PAGE_SHIFT; - GUEST_PHYSICAL_ADDRESS addr = 0; - - /* sv_enable_dfp(); */ - if (offset & (PAGE_SIZE - 1)) - return -ENXIO; /* need aligned offsets */ - - switch (offset) { - case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: - vma->vm_flags |= VM_IO; - if (*file_controlvm_channel == NULL) { - return -ENXIO; - } - visorchannel_read(*file_controlvm_channel, - offsetof(struct spar_controlvm_channel_protocol, - gp_control_channel), - &addr, sizeof(addr)); - if (addr == 0) { - return -ENXIO; - } - physaddr = (ulong)addr; - if (remap_pfn_range(vma, vma->vm_start, - physaddr >> PAGE_SHIFT, - vma->vm_end - vma->vm_start, - /*pgprot_noncached */ - (vma->vm_page_prot))) { - return -EAGAIN; - } - break; - default: - return -ENOSYS; - } - return 0; -} - -static long visorchipset_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - s64 adjustment; - s64 vrtc_offset; - - switch (cmd) { - case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: - /* get the physical rtc offset */ - vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); - if (copy_to_user - ((void __user *)arg, &vrtc_offset, sizeof(vrtc_offset))) { - return -EFAULT; - } - return SUCCESS; - case VMCALL_UPDATE_PHYSICAL_TIME: - if (copy_from_user - (&adjustment, (void __user *)arg, sizeof(adjustment))) { - return -EFAULT; - } - return issue_vmcall_update_physical_time(adjustment); - default: - return -EFAULT; - } -} - -static const struct file_operations visorchipset_fops = { - .owner = THIS_MODULE, - .open = visorchipset_open, - .read = NULL, - .write = NULL, - .unlocked_ioctl = visorchipset_ioctl, - .release = visorchipset_release, - .mmap = visorchipset_mmap, -}; - -int -visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) -{ - int rc = 0; - - file_controlvm_channel = controlvm_channel; - cdev_init(&file_cdev, &visorchipset_fops); - file_cdev.owner = THIS_MODULE; - if (MAJOR(major_dev) == 0) { - rc = alloc_chrdev_region(&major_dev, 0, 1, MYDRVNAME); - /* dynamic major device number registration required */ - if (rc < 0) - return rc; - } else { - /* static major device number registration required */ - rc = register_chrdev_region(major_dev, 1, MYDRVNAME); - if (rc < 0) - return rc; - } - rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); - if (rc < 0) { - unregister_chrdev_region(major_dev, 1); - return rc; - } - return 0; -} diff --git a/drivers/staging/unisys/visorchipset/file.h b/drivers/staging/unisys/visorchipset/file.h deleted file mode 100644 index 51f7699b7..000000000 --- a/drivers/staging/unisys/visorchipset/file.h +++ /dev/null @@ -1,27 +0,0 @@ -/* file.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __FILE_H__ -#define __FILE_H__ - -#include "globals.h" - -int visorchipset_file_init(dev_t majorDev, - struct visorchannel **pControlVm_channel); -void visorchipset_file_cleanup(dev_t major_dev); - -#endif diff --git a/drivers/staging/unisys/visorchipset/globals.h b/drivers/staging/unisys/visorchipset/globals.h deleted file mode 100644 index f76e498a3..000000000 --- a/drivers/staging/unisys/visorchipset/globals.h +++ /dev/null @@ -1,42 +0,0 @@ -/* globals.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __VISORCHIPSET_GLOBALS_H__ -#define __VISORCHIPSET_GLOBALS_H__ - -#include "diagnostics/appos_subsystems.h" -#include "timskmod.h" -#include "visorchipset.h" -#include "visorchipset_umode.h" -#include "version.h" - -#define MYDRVNAME "visorchipset" - -/* module parameters */ - -extern int visorchipset_testvnic; -extern int visorchipset_testvnicclient; -extern int visorchipset_testmsg; -extern int visorchipset_major; -extern int visorchipset_serverregwait; -extern int visorchipset_clientregwait; -extern int visorchipset_testteardown; -extern int visorchipset_disable_controlvm; -extern int visorchipset_crash_kernel; -extern int visorchipset_holdchipsetready; - -#endif diff --git a/drivers/staging/unisys/visorchipset/parser.c b/drivers/staging/unisys/visorchipset/parser.c deleted file mode 100644 index d8a2d6f5a..000000000 --- a/drivers/staging/unisys/visorchipset/parser.c +++ /dev/null @@ -1,430 +0,0 @@ -/* parser.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#include "parser.h" -#include "memregion.h" -#include "controlvmchannel.h" -#include <linux/ctype.h> -#include <linux/mm.h> -#include <linux/uuid.h> - -#define MYDRVNAME "visorchipset_parser" -#define CURRENT_FILE_PC VISOR_CHIPSET_PC_parser_c - -/* We will refuse to allocate more than this many bytes to copy data from - * incoming payloads. This serves as a throttling mechanism. - */ -#define MAX_CONTROLVM_PAYLOAD_BYTES (1024*128) -static ulong controlvm_payload_bytes_buffered; - -struct parser_context { - ulong allocbytes; - ulong param_bytes; - u8 *curr; - ulong bytes_remaining; - BOOL byte_stream; - char data[0]; -}; - -static struct parser_context * -parser_init_guts(u64 addr, u32 bytes, BOOL local, - BOOL standard_payload_header, BOOL *retry) -{ - int allocbytes = sizeof(struct parser_context) + bytes; - struct parser_context *rc = NULL; - struct parser_context *ctx = NULL; - struct memregion *rgn = NULL; - struct spar_controlvm_parameters_header *phdr = NULL; - - if (retry) - *retry = FALSE; - if (!standard_payload_header) - /* alloc and 0 extra byte to ensure payload is - * '\0'-terminated - */ - allocbytes++; - if ((controlvm_payload_bytes_buffered + bytes) - > MAX_CONTROLVM_PAYLOAD_BYTES) { - if (retry) - *retry = TRUE; - rc = NULL; - goto cleanup; - } - ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY); - if (!ctx) { - if (retry) - *retry = TRUE; - rc = NULL; - goto cleanup; - } - - ctx->allocbytes = allocbytes; - ctx->param_bytes = bytes; - ctx->curr = NULL; - ctx->bytes_remaining = 0; - ctx->byte_stream = FALSE; - if (local) { - void *p; - - if (addr > virt_to_phys(high_memory - 1)) { - rc = NULL; - goto cleanup; - } - p = __va((ulong) (addr)); - memcpy(ctx->data, p, bytes); - } else { - rgn = visor_memregion_create(addr, bytes); - if (!rgn) { - rc = NULL; - goto cleanup; - } - if (visor_memregion_read(rgn, 0, ctx->data, bytes) < 0) { - rc = NULL; - goto cleanup; - } - } - if (!standard_payload_header) { - ctx->byte_stream = TRUE; - rc = ctx; - goto cleanup; - } - phdr = (struct spar_controlvm_parameters_header *)(ctx->data); - if (phdr->total_length != bytes) { - rc = NULL; - goto cleanup; - } - if (phdr->total_length < phdr->header_length) { - rc = NULL; - goto cleanup; - } - if (phdr->header_length < - sizeof(struct spar_controlvm_parameters_header)) { - rc = NULL; - goto cleanup; - } - - rc = ctx; -cleanup: - if (rgn) { - visor_memregion_destroy(rgn); - rgn = NULL; - } - if (rc) { - controlvm_payload_bytes_buffered += ctx->param_bytes; - } else { - if (ctx) { - parser_done(ctx); - ctx = NULL; - } - } - return rc; -} - -struct parser_context * -parser_init(u64 addr, u32 bytes, BOOL local, BOOL *retry) -{ - return parser_init_guts(addr, bytes, local, TRUE, retry); -} - -/* Call this instead of parser_init() if the payload area consists of just - * a sequence of bytes, rather than a struct spar_controlvm_parameters_header - * structures. Afterwards, you can call parser_simpleString_get() or - * parser_byteStream_get() to obtain the data. - */ -struct parser_context * -parser_init_byte_stream(u64 addr, u32 bytes, BOOL local, BOOL *retry) -{ - return parser_init_guts(addr, bytes, local, FALSE, retry); -} - -/* Obtain '\0'-terminated copy of string in payload area. - */ -char * -parser_simpleString_get(struct parser_context *ctx) -{ - if (!ctx->byte_stream) - return NULL; - return ctx->data; /* note this IS '\0'-terminated, because of - * the num of bytes we alloc+clear in - * parser_init_byteStream() */ -} - -/* Obtain a copy of the buffer in the payload area. - */ -void *parser_byte_stream_get(struct parser_context *ctx, ulong *nbytes) -{ - if (!ctx->byte_stream) - return NULL; - if (nbytes) - *nbytes = ctx->param_bytes; - return (void *)ctx->data; -} - -uuid_le -parser_id_get(struct parser_context *ctx) -{ - struct spar_controlvm_parameters_header *phdr = NULL; - - if (ctx == NULL) - return NULL_UUID_LE; - phdr = (struct spar_controlvm_parameters_header *)(ctx->data); - return phdr->id; -} - -void -parser_param_start(struct parser_context *ctx, PARSER_WHICH_STRING which_string) -{ - struct spar_controlvm_parameters_header *phdr = NULL; - - if (ctx == NULL) - goto Away; - phdr = (struct spar_controlvm_parameters_header *)(ctx->data); - switch (which_string) { - case PARSERSTRING_INITIATOR: - ctx->curr = ctx->data + phdr->initiator_offset; - ctx->bytes_remaining = phdr->initiator_length; - break; - case PARSERSTRING_TARGET: - ctx->curr = ctx->data + phdr->target_offset; - ctx->bytes_remaining = phdr->target_length; - break; - case PARSERSTRING_CONNECTION: - ctx->curr = ctx->data + phdr->connection_offset; - ctx->bytes_remaining = phdr->connection_length; - break; - case PARSERSTRING_NAME: - ctx->curr = ctx->data + phdr->name_offset; - ctx->bytes_remaining = phdr->name_length; - break; - default: - break; - } - -Away: - return; -} - -void -parser_done(struct parser_context *ctx) -{ - if (!ctx) - return; - controlvm_payload_bytes_buffered -= ctx->param_bytes; - kfree(ctx); -} - -/** Return length of string not counting trailing spaces. */ -static int -string_length_no_trail(char *s, int len) -{ - int i = len - 1; - - while (i >= 0) { - if (!isspace(s[i])) - return i + 1; - i--; - } - return 0; -} - -/** Grab the next name and value out of the parameter buffer. - * The entire parameter buffer looks like this: - * <name>=<value>\0 - * <name>=<value>\0 - * ... - * \0 - * If successful, the next <name> value is returned within the supplied - * <nam> buffer (the value is always upper-cased), and the corresponding - * <value> is returned within a kmalloc()ed buffer, whose pointer is - * provided as the return value of this function. - * (The total number of bytes allocated is strlen(<value>)+1.) - * - * NULL is returned to indicate failure, which can occur for several reasons: - * - all <name>=<value> pairs have already been processed - * - bad parameter - * - parameter buffer ends prematurely (couldn't find an '=' or '\0' within - * the confines of the parameter buffer) - * - the <nam> buffer is not large enough to hold the <name> of the next - * parameter - */ -void * -parser_param_get(struct parser_context *ctx, char *nam, int namesize) -{ - u8 *pscan, *pnam = nam; - ulong nscan; - int value_length = -1, orig_value_length = -1; - void *value = NULL; - int i; - int closing_quote = 0; - - if (!ctx) - return NULL; - pscan = ctx->curr; - nscan = ctx->bytes_remaining; - if (nscan == 0) - return NULL; - if (*pscan == '\0') - /* This is the normal return point after you have processed - * all of the <name>=<value> pairs in a syntactically-valid - * parameter buffer. - */ - return NULL; - - /* skip whitespace */ - while (isspace(*pscan)) { - pscan++; - nscan--; - if (nscan == 0) - return NULL; - } - - while (*pscan != ':') { - if (namesize <= 0) - return NULL; - *pnam = toupper(*pscan); - pnam++; - namesize--; - pscan++; - nscan--; - if (nscan == 0) - return NULL; - } - if (namesize <= 0) - return NULL; - *pnam = '\0'; - nam[string_length_no_trail(nam, strlen(nam))] = '\0'; - - /* point to char immediately after ":" in "<name>:<value>" */ - pscan++; - nscan--; - /* skip whitespace */ - while (isspace(*pscan)) { - pscan++; - nscan--; - if (nscan == 0) - return NULL; - } - if (nscan == 0) - return NULL; - if (*pscan == '\'' || *pscan == '"') { - closing_quote = *pscan; - pscan++; - nscan--; - if (nscan == 0) - return NULL; - } - - /* look for a separator character, terminator character, or - * end of data - */ - for (i = 0, value_length = -1; i < nscan; i++) { - if (closing_quote) { - if (pscan[i] == '\0') - return NULL; - if (pscan[i] == closing_quote) { - value_length = i; - break; - } - } else - if (pscan[i] == ',' || pscan[i] == ';' - || pscan[i] == '\0') { - value_length = i; - break; - } - } - if (value_length < 0) { - if (closing_quote) - return NULL; - value_length = nscan; - } - orig_value_length = value_length; - if (closing_quote == 0) - value_length = string_length_no_trail(pscan, orig_value_length); - value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); - if (value == NULL) - return NULL; - memcpy(value, pscan, value_length); - ((u8 *) (value))[value_length] = '\0'; - - pscan += orig_value_length; - nscan -= orig_value_length; - - /* skip past separator or closing quote */ - if (nscan > 0) { - if (*pscan != '\0') { - pscan++; - nscan--; - } - } - - if (closing_quote && (nscan > 0)) { - /* we still need to skip around the real separator if present */ - /* first, skip whitespace */ - while (isspace(*pscan)) { - pscan++; - nscan--; - if (nscan == 0) - break; - } - if (nscan > 0) { - if (*pscan == ',' || *pscan == ';') { - pscan++; - nscan--; - } else if (*pscan != '\0') { - kfree(value); - value = NULL; - return NULL; - } - } - } - ctx->curr = pscan; - ctx->bytes_remaining = nscan; - return value; -} - -void * -parser_string_get(struct parser_context *ctx) -{ - u8 *pscan; - ulong nscan; - int value_length = -1; - void *value = NULL; - int i; - - if (!ctx) - return NULL; - pscan = ctx->curr; - nscan = ctx->bytes_remaining; - if (nscan == 0) - return NULL; - if (!pscan) - return NULL; - for (i = 0, value_length = -1; i < nscan; i++) - if (pscan[i] == '\0') { - value_length = i; - break; - } - if (value_length < 0) /* '\0' was not included in the length */ - value_length = nscan; - value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); - if (value == NULL) - return NULL; - if (value_length > 0) - memcpy(value, pscan, value_length); - ((u8 *) (value))[value_length] = '\0'; - return value; -} diff --git a/drivers/staging/unisys/visorchipset/parser.h b/drivers/staging/unisys/visorchipset/parser.h deleted file mode 100644 index 2b903f1be..000000000 --- a/drivers/staging/unisys/visorchipset/parser.h +++ /dev/null @@ -1,46 +0,0 @@ -/* parser.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __PARSER_H__ -#define __PARSER_H__ - -#include <linux/uuid.h> - -#include "timskmod.h" -#include "channel.h" - -typedef enum { - PARSERSTRING_INITIATOR, - PARSERSTRING_TARGET, - PARSERSTRING_CONNECTION, - PARSERSTRING_NAME, -} PARSER_WHICH_STRING; - -struct parser_context *parser_init(u64 addr, u32 bytes, BOOL isLocal, - BOOL *tryAgain); -struct parser_context *parser_init_byte_stream(u64 addr, u32 bytes, BOOL local, - BOOL *retry); -void parser_param_start(struct parser_context *ctx, - PARSER_WHICH_STRING which_string); -void *parser_param_get(struct parser_context *ctx, char *nam, int namesize); -void *parser_string_get(struct parser_context *ctx); -uuid_le parser_id_get(struct parser_context *ctx); -char *parser_simpleString_get(struct parser_context *ctx); -void *parser_byte_stream_get(struct parser_context *ctx, ulong *nbytes); -void parser_done(struct parser_context *ctx); - -#endif diff --git a/drivers/staging/unisys/visorchipset/visorchipset.h b/drivers/staging/unisys/visorchipset/visorchipset.h deleted file mode 100644 index bd46df9ef..000000000 --- a/drivers/staging/unisys/visorchipset/visorchipset.h +++ /dev/null @@ -1,236 +0,0 @@ -/* visorchipset.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __VISORCHIPSET_H__ -#define __VISORCHIPSET_H__ - -#include <linux/uuid.h> - -#include "timskmod.h" -#include "channel.h" -#include "controlvmchannel.h" -#include "parser.h" -#include "procobjecttree.h" -#include "vbusdeviceinfo.h" -#include "vbushelper.h" - -/** Describes the state from the perspective of which controlvm messages have - * been received for a bus or device. - */ -struct visorchipset_state { - u32 created:1; - u32 attached:1; - u32 configured:1; - u32 running:1; - /* Add new fields above. */ - /* Remaining bits in this 32-bit word are unused. */ -}; - -enum visorchipset_addresstype { - /** address is guest physical, but outside of the physical memory - * region that is controlled by the running OS (this is the normal - * address type for Supervisor channels) - */ - ADDRTYPE_LOCALPHYSICAL, - - /** address is guest physical, and withIN the confines of the - * physical memory controlled by the running OS. - */ - ADDRTYPE_LOCALTEST, -}; - -enum crash_obj_type { - CRASH_DEV, - CRASH_BUS, -}; - -/** Attributes for a particular Supervisor channel. - */ -struct visorchipset_channel_info { - enum visorchipset_addresstype addr_type; - HOSTADDRESS channel_addr; - struct irq_info intr; - u64 n_channel_bytes; - uuid_le channel_type_uuid; - uuid_le channel_inst_uuid; - -}; - -/** Attributes for a particular Supervisor device. - * Any visorchipset client can query these attributes using - * visorchipset_get_client_device_info() or - * visorchipset_get_server_device_info(). - */ -struct visorchipset_device_info { - struct list_head entry; - u32 bus_no; - u32 dev_no; - uuid_le dev_inst_uuid; - struct visorchipset_state state; - struct visorchipset_channel_info chan_info; - u32 reserved1; /* control_vm_id */ - u64 reserved2; - u32 switch_no; /* when devState.attached==1 */ - u32 internal_port_no; /* when devState.attached==1 */ - struct controlvm_message_header pending_msg_hdr;/* CONTROLVM_MESSAGE */ - /** For private use by the bus driver */ - void *bus_driver_context; - -}; - -static inline struct visorchipset_device_info *finddevice( - struct list_head *list, u32 bus_no, u32 dev_no) -{ - struct visorchipset_device_info *p; - - list_for_each_entry(p, list, entry) { - if (p->bus_no == bus_no && p->dev_no == dev_no) - return p; - } - return NULL; -} - -static inline void delbusdevices(struct list_head *list, u32 bus_no) -{ - struct visorchipset_device_info *p, *tmp; - - list_for_each_entry_safe(p, tmp, list, entry) { - if (p->bus_no == bus_no) { - list_del(&p->entry); - kfree(p); - } - } -} - -/** Attributes for a particular Supervisor bus. - * (For a service partition acting as the server for buses/devices, there - * is a 1-to-1 relationship between busses and guest partitions.) - * Any visorchipset client can query these attributes using - * visorchipset_get_client_bus_info() or visorchipset_get_bus_info(). - */ -struct visorchipset_bus_info { - struct list_head entry; - u32 bus_no; - struct visorchipset_state state; - struct visorchipset_channel_info chan_info; - uuid_le partition_uuid; - u64 partition_handle; - u8 *name; /* UTF8 */ - u8 *description; /* UTF8 */ - u64 reserved1; - u32 reserved2; - struct { - u32 server:1; - /* Add new fields above. */ - /* Remaining bits in this 32-bit word are unused. */ - } flags; - struct controlvm_message_header pending_msg_hdr;/* CONTROLVM MsgHdr */ - /** For private use by the bus driver */ - void *bus_driver_context; - u64 dev_no; - -}; - -static inline struct visorchipset_bus_info * -findbus(struct list_head *list, u32 bus_no) -{ - struct visorchipset_bus_info *p; - - list_for_each_entry(p, list, entry) { - if (p->bus_no == bus_no) - return p; - } - return NULL; -} - -/* These functions will be called from within visorchipset when certain - * events happen. (The implementation of these functions is outside of - * visorchipset.) - */ -struct visorchipset_busdev_notifiers { - void (*bus_create)(ulong bus_no); - void (*bus_destroy)(ulong bus_no); - void (*device_create)(ulong bus_no, ulong dev_no); - void (*device_destroy)(ulong bus_no, ulong dev_no); - void (*device_pause)(ulong bus_no, ulong dev_no); - void (*device_resume)(ulong bus_no, ulong dev_no); - int (*get_channel_info)(uuid_le type_uuid, ulong *min_size, - ulong *max_size); -}; - -/* These functions live inside visorchipset, and will be called to indicate - * responses to specific events (by code outside of visorchipset). - * For now, the value for each response is simply either: - * 0 = it worked - * -1 = it failed - */ -struct visorchipset_busdev_responders { - void (*bus_create)(ulong bus_no, int response); - void (*bus_destroy)(ulong bus_no, int response); - void (*device_create)(ulong bus_no, ulong dev_no, int response); - void (*device_destroy)(ulong bus_no, ulong dev_no, int response); - void (*device_pause)(ulong bus_no, ulong dev_no, int response); - void (*device_resume)(ulong bus_no, ulong dev_no, int response); -}; - -/** Register functions (in the bus driver) to get called by visorchipset - * whenever a bus or device appears for which this service partition is - * to be the server for. visorchipset will fill in <responders>, to - * indicate functions the bus driver should call to indicate message - * responses. - */ -void -visorchipset_register_busdev_client( - struct visorchipset_busdev_notifiers *notifiers, - struct visorchipset_busdev_responders *responders, - struct ultra_vbus_deviceinfo *driver_info); - -/** Register functions (in the bus driver) to get called by visorchipset - * whenever a bus or device appears for which this service partition is - * to be the client for. visorchipset will fill in <responders>, to - * indicate functions the bus driver should call to indicate message - * responses. - */ -void -visorchipset_register_busdev_server( - struct visorchipset_busdev_notifiers *notifiers, - struct visorchipset_busdev_responders *responders, - struct ultra_vbus_deviceinfo *driver_info); - -typedef void (*SPARREPORTEVENT_COMPLETE_FUNC) (struct controlvm_message *msg, - int status); - -void visorchipset_device_pause_response(ulong bus_no, ulong dev_no, - int response); - -BOOL visorchipset_get_bus_info(ulong bus_no, - struct visorchipset_bus_info *bus_info); -BOOL visorchipset_get_device_info(ulong bus_no, ulong dev_no, - struct visorchipset_device_info *dev_info); -BOOL visorchipset_set_bus_context(ulong bus_no, void *context); -BOOL visorchipset_set_device_context(ulong bus_no, ulong dev_no, void *context); -int visorchipset_chipset_ready(void); -int visorchipset_chipset_selftest(void); -int visorchipset_chipset_notready(void); -void visorchipset_save_message(struct controlvm_message *msg, - enum crash_obj_type type); -void *visorchipset_cache_alloc(struct kmem_cache *pool, - BOOL ok_to_block, char *fn, int ln); -void visorchipset_cache_free(struct kmem_cache *pool, void *p, - char *fn, int ln); - -#endif diff --git a/drivers/staging/unisys/visorchipset/visorchipset_umode.h b/drivers/staging/unisys/visorchipset/visorchipset_umode.h deleted file mode 100644 index 6cf6eccb3..000000000 --- a/drivers/staging/unisys/visorchipset/visorchipset_umode.h +++ /dev/null @@ -1,35 +0,0 @@ -/* visorchipset_umode.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/** @file ********************************************************************* - * - * This describes structures needed for the interface between the - * visorchipset driver and a user-mode component that opens the device. - * - ****************************************************************************** - */ - -#ifndef __VISORCHIPSET_UMODE_H -#define __VISORCHIPSET_UMODE_H - -/** The user-mode program can access the control channel buffer directly - * via this memory map. - */ -#define VISORCHIPSET_MMAP_CONTROLCHANOFFSET (0x00000000) -#define VISORCHIPSET_MMAP_CONTROLCHANSIZE (0x00400000) /* 4MB */ - -#endif /* __VISORCHIPSET_UMODE_H */ diff --git a/drivers/staging/unisys/visornic/Kconfig b/drivers/staging/unisys/visornic/Kconfig new file mode 100644 index 000000000..1676dc707 --- /dev/null +++ b/drivers/staging/unisys/visornic/Kconfig @@ -0,0 +1,15 @@ +# +# Unisys visornic configuration +# + +config UNISYS_VISORNIC + tristate "Unisys visornic driver" + depends on UNISYSSPAR && UNISYS_VISORBUS && NET + ---help--- + The Unisys Visornic driver provides support for s-Par network + devices exposed on the s-Par visorbus. When a message is sent + to visorbus to create a network device, the probe function of + visornic is called to create the netdev device. Networking on + s-Par switches will not work if this driver is not selected. + If you say Y here, you will enable the Unisys visornic driver. + diff --git a/drivers/staging/unisys/visornic/Makefile b/drivers/staging/unisys/visornic/Makefile new file mode 100644 index 000000000..439e95e03 --- /dev/null +++ b/drivers/staging/unisys/visornic/Makefile @@ -0,0 +1,10 @@ +# +# Makefile for Unisys channel +# + +obj-$(CONFIG_UNISYS_VISORNIC) += visornic.o + +visornic-y := visornic_main.o + +ccflags-y += -Idrivers/staging/unisys/include + diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c new file mode 100644 index 000000000..710074437 --- /dev/null +++ b/drivers/staging/unisys/visornic/visornic_main.c @@ -0,0 +1,2140 @@ +/* Copyright (c) 2012 - 2015 UNISYS CORPORATION + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +/* This driver lives in a spar partition, and registers to ethernet io + * channels from the visorbus driver. It creates netdev devices and + * forwards transmit to the IO channel and accepts rcvs from the IO + * Partition via the IO channel. + */ + +#include <linux/debugfs.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/kthread.h> + +#include "visorbus.h" +#include "iochannel.h" + +#define VISORNIC_INFINITE_RESPONSE_WAIT 0 +#define VISORNICSOPENMAX 32 +#define MAXDEVICES 16384 + +/* MAX_BUF = 64 lines x 32 MAXVNIC x 80 characters + * = 163840 bytes + */ +#define MAX_BUF 163840 + +static spinlock_t dev_num_pool_lock; +static void *dev_num_pool; /**< pool to grab device numbers from */ + +static int visornic_probe(struct visor_device *dev); +static void visornic_remove(struct visor_device *dev); +static int visornic_pause(struct visor_device *dev, + visorbus_state_complete_func complete_func); +static int visornic_resume(struct visor_device *dev, + visorbus_state_complete_func complete_func); + +/* DEBUGFS declarations */ +static ssize_t info_debugfs_read(struct file *file, char __user *buf, + size_t len, loff_t *offset); +static ssize_t enable_ints_write(struct file *file, const char __user *buf, + size_t len, loff_t *ppos); +static struct dentry *visornic_debugfs_dir; +static const struct file_operations debugfs_info_fops = { + .read = info_debugfs_read, +}; + +static const struct file_operations debugfs_enable_ints_fops = { + .write = enable_ints_write, +}; + +static struct workqueue_struct *visornic_serverdown_workqueue; +static struct workqueue_struct *visornic_timeout_reset_workqueue; + +/* GUIDS for director channel type supported by this driver. */ +static struct visor_channeltype_descriptor visornic_channel_types[] = { + /* Note that the only channel type we expect to be reported by the + * bus driver is the SPAR_VNIC channel. + */ + { SPAR_VNIC_CHANNEL_PROTOCOL_UUID, "ultravnic" }, + { NULL_UUID_LE, NULL } +}; + +/* This is used to tell the visor bus driver which types of visor devices + * we support, and what functions to call when a visor device that we support + * is attached or removed. + */ +static struct visor_driver visornic_driver = { + .name = "visornic", + .version = "1.0.0.0", + .vertag = NULL, + .owner = THIS_MODULE, + .channel_types = visornic_channel_types, + .probe = visornic_probe, + .remove = visornic_remove, + .pause = visornic_pause, + .resume = visornic_resume, + .channel_interrupt = NULL, +}; + +struct visor_thread_info { + struct task_struct *task; + struct completion has_stopped; + int id; +}; + +struct chanstat { + unsigned long got_rcv; + unsigned long got_enbdisack; + unsigned long got_xmit_done; + unsigned long xmit_fail; + unsigned long sent_enbdis; + unsigned long sent_promisc; + unsigned long sent_post; + unsigned long sent_xmit; + unsigned long reject_count; + unsigned long extra_rcvbufs_sent; +}; + +struct visornic_devdata { + int devnum; + int thread_wait_ms; + unsigned short enabled; /* 0 disabled 1 enabled to receive */ + unsigned short enab_dis_acked; /* NET_RCV_ENABLE/DISABLE acked by + * IOPART + */ + struct visor_device *dev; + char name[99]; + struct list_head list_all; /* < link within list_all_devices list */ + struct kref kref; + struct net_device *netdev; + struct net_device_stats net_stats; + atomic_t interrupt_rcvd; + wait_queue_head_t rsp_queue; + struct sk_buff **rcvbuf; + u64 uniquenum; /* TODO figure out why not used */ + unsigned short old_flags; /* flags as they were prior to + * set_multicast_list + */ + atomic_t usage; /* count of users */ + int num_rcv_bufs; /* indicates how many rcv buffers + * the vnic will post + */ + int num_rcv_bufs_could_not_alloc; + atomic_t num_rcvbuf_in_iovm; + unsigned long alloc_failed_in_if_needed_cnt; + unsigned long alloc_failed_in_repost_rtn_cnt; + int max_outstanding_net_xmits; /* absolute max number of outstanding + * xmits - should never hit this + */ + int upper_threshold_net_xmits; /* high water mark for calling + * netif_stop_queue() + */ + int lower_threshold_net_xmits; /* high water mark for calling + * netif_wake_queue() + */ + struct sk_buff_head xmitbufhead; /* xmitbufhead is the head of the + * xmit buffer list that have been + * sent to the IOPART end + */ + struct work_struct serverdown_completion; + struct work_struct timeout_reset; + struct uiscmdrsp *cmdrsp_rcv; /* cmdrsp_rcv is used for + * posting/unposting rcv buffers + */ + struct uiscmdrsp *xmit_cmdrsp; /* used to issue NET_XMIT - there is + * never more that one xmit in + * progress at a time + */ + bool server_down; /* IOPART is down */ + bool server_change_state; /* Processing SERVER_CHANGESTATE msg */ + struct dentry *eth_debugfs_dir; + struct visor_thread_info threadinfo; + u64 interrupts_rcvd; + u64 interrupts_notme; + u64 interrupts_disabled; + u64 busy_cnt; + spinlock_t priv_lock; /* spinlock to access devdata structures */ + + /* flow control counter */ + u64 flow_control_upper_hits; + u64 flow_control_lower_hits; + + /* debug counters */ + unsigned long n_rcv0; /* # rcvs of 0 buffers */ + unsigned long n_rcv1; /* # rcvs of 1 buffers */ + unsigned long n_rcv2; /* # rcvs of 2 buffers */ + unsigned long n_rcvx; /* # rcvs of >2 buffers */ + unsigned long found_repost_rcvbuf_cnt; /* # times we called + * repost_rcvbuf_cnt + */ + unsigned long repost_found_skb_cnt; /* # times found the skb */ + unsigned long n_repost_deficit; /* # times we couldn't find + * all of the rcv buffers + */ + unsigned long bad_rcv_buf; /* # times we negleted to + * free the rcv skb because + * we didn't know where it + * came from + */ + unsigned long n_rcv_packets_not_accepted;/* # bogs rcv packets */ + + int queuefullmsg_logged; + struct chanstat chstat; +}; + +/* array of open devices maintained by open() and close() */ +static struct net_device *num_visornic_open[VISORNICSOPENMAX]; + +/* List of all visornic_devdata structs, + * linked via the list_all member + */ +static LIST_HEAD(list_all_devices); +static DEFINE_SPINLOCK(lock_all_devices); + +/** + * visor_copy_fragsinfo_from_skb( + * @skb_in: skbuff that we are pulling the frags from + * @firstfraglen: length of first fragment in skb + * @frags_max: max len of frags array + * @frags: frags array filled in on output + * + * Copy the fragment list in the SKB to a phys_info + * array that the IOPART understands. + * Return value indicates number of entries filled in frags + * Negative values indicate an error. + */ +static unsigned int +visor_copy_fragsinfo_from_skb(struct sk_buff *skb, unsigned int firstfraglen, + unsigned int frags_max, + struct phys_info frags[]) +{ + unsigned int count = 0, ii, size, offset = 0, numfrags; + + numfrags = skb_shinfo(skb)->nr_frags; + + while (firstfraglen) { + if (count == frags_max) + return -EINVAL; + + frags[count].pi_pfn = + page_to_pfn(virt_to_page(skb->data + offset)); + frags[count].pi_off = + (unsigned long)(skb->data + offset) & PI_PAGE_MASK; + size = min_t(unsigned int, firstfraglen, + PI_PAGE_SIZE - frags[count].pi_off); + + /* can take smallest of firstfraglen (what's left) OR + * bytes left in the page + */ + frags[count].pi_len = size; + firstfraglen -= size; + offset += size; + count++; + } + if (numfrags) { + if ((count + numfrags) > frags_max) + return -EINVAL; + + for (ii = 0; ii < numfrags; ii++) { + count = add_physinfo_entries(page_to_pfn( + skb_frag_page(&skb_shinfo(skb)->frags[ii])), + skb_shinfo(skb)->frags[ii]. + page_offset, + skb_shinfo(skb)->frags[ii]. + size, count, frags_max, frags); + if (!count) + return -EIO; + } + } + if (skb_shinfo(skb)->frag_list) { + struct sk_buff *skbinlist; + int c; + + for (skbinlist = skb_shinfo(skb)->frag_list; skbinlist; + skbinlist = skbinlist->next) { + c = visor_copy_fragsinfo_from_skb(skbinlist, + skbinlist->len - + skbinlist->data_len, + frags_max - count, + &frags[count]); + if (c < 0) + return c; + count += c; + } + } + return count; +} + +/** + * visort_thread_start - starts thread for the device + * @thrinfo: The thread to start + * @threadfn: Function the thread starts + * @thrcontext: Context to pass to the thread, i.e. devdata + * @name: string describing name of thread + * + * Starts a thread for the device, currently only thread is + * process_incoming_rsps + * Returns 0 on success; + */ +static int visor_thread_start(struct visor_thread_info *thrinfo, + int (*threadfn)(void *), + void *thrcontext, char *name) +{ + /* used to stop the thread */ + init_completion(&thrinfo->has_stopped); + thrinfo->task = kthread_run(threadfn, thrcontext, name); + if (IS_ERR(thrinfo->task)) { + thrinfo->id = 0; + return -EINVAL; + } + thrinfo->id = thrinfo->task->pid; + return 0; +} + +/** + * visor_thread_stop - stop a thread for the device + * @thrinfo: The thread to stop + * + * Stop the thread and wait for completion for a minute + * Returns void. + */ +static void visor_thread_stop(struct visor_thread_info *thrinfo) +{ + if (!thrinfo->id) + return; /* thread not running */ + + kthread_stop(thrinfo->task); + /* give up if the thread has NOT died in 1 minute */ + if (wait_for_completion_timeout(&thrinfo->has_stopped, 60 * HZ)) + thrinfo->id = 0; +} + +/* DebugFS code */ +static ssize_t info_debugfs_read(struct file *file, char __user *buf, + size_t len, loff_t *offset) +{ + int i; + ssize_t bytes_read = 0; + int str_pos = 0; + struct visornic_devdata *devdata; + char *vbuf; + + if (len > MAX_BUF) + len = MAX_BUF; + vbuf = kzalloc(len, GFP_KERNEL); + if (!vbuf) + return -ENOMEM; + + /* for each vnic channel + * dump out channel specific data + */ + for (i = 0; i < VISORNICSOPENMAX; i++) { + if (!num_visornic_open[i]) + continue; + + devdata = netdev_priv(num_visornic_open[i]); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + "Vnic i = %d\n", i); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + "netdev = %s (0x%p), MAC Addr %pM\n", + num_visornic_open[i]->name, + num_visornic_open[i], + num_visornic_open[i]->dev_addr); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + "VisorNic Dev Info = 0x%p\n", devdata); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " num_rcv_bufs = %d\n", + devdata->num_rcv_bufs); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " max_oustanding_next_xmits = %d\n", + devdata->max_outstanding_net_xmits); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " upper_threshold_net_xmits = %d\n", + devdata->upper_threshold_net_xmits); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " lower_threshold_net_xmits = %d\n", + devdata->lower_threshold_net_xmits); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " queuefullmsg_logged = %d\n", + devdata->queuefullmsg_logged); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.got_rcv = %lu\n", + devdata->chstat.got_rcv); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.got_enbdisack = %lu\n", + devdata->chstat.got_enbdisack); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.got_xmit_done = %lu\n", + devdata->chstat.got_xmit_done); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.xmit_fail = %lu\n", + devdata->chstat.xmit_fail); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.sent_enbdis = %lu\n", + devdata->chstat.sent_enbdis); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.sent_promisc = %lu\n", + devdata->chstat.sent_promisc); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.sent_post = %lu\n", + devdata->chstat.sent_post); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.sent_xmit = %lu\n", + devdata->chstat.sent_xmit); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.reject_count = %lu\n", + devdata->chstat.reject_count); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " chstat.extra_rcvbufs_sent = %lu\n", + devdata->chstat.extra_rcvbufs_sent); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " n_rcv0 = %lu\n", devdata->n_rcv0); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " n_rcv1 = %lu\n", devdata->n_rcv1); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " n_rcv2 = %lu\n", devdata->n_rcv2); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " n_rcvx = %lu\n", devdata->n_rcvx); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " num_rcvbuf_in_iovm = %d\n", + atomic_read(&devdata->num_rcvbuf_in_iovm)); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " alloc_failed_in_if_needed_cnt = %lu\n", + devdata->alloc_failed_in_if_needed_cnt); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " alloc_failed_in_repost_rtn_cnt = %lu\n", + devdata->alloc_failed_in_repost_rtn_cnt); + /* str_pos += scnprintf(vbuf + str_pos, len - str_pos, + * " inner_loop_limit_reached_cnt = %lu\n", + * devdata->inner_loop_limit_reached_cnt); + */ + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " found_repost_rcvbuf_cnt = %lu\n", + devdata->found_repost_rcvbuf_cnt); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " repost_found_skb_cnt = %lu\n", + devdata->repost_found_skb_cnt); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " n_repost_deficit = %lu\n", + devdata->n_repost_deficit); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " bad_rcv_buf = %lu\n", + devdata->bad_rcv_buf); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " n_rcv_packets_not_accepted = %lu\n", + devdata->n_rcv_packets_not_accepted); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " interrupts_rcvd = %llu\n", + devdata->interrupts_rcvd); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " interrupts_notme = %llu\n", + devdata->interrupts_notme); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " interrupts_disabled = %llu\n", + devdata->interrupts_disabled); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " busy_cnt = %llu\n", + devdata->busy_cnt); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " flow_control_upper_hits = %llu\n", + devdata->flow_control_upper_hits); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " flow_control_lower_hits = %llu\n", + devdata->flow_control_lower_hits); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " thread_wait_ms = %d\n", + devdata->thread_wait_ms); + str_pos += scnprintf(vbuf + str_pos, len - str_pos, + " netif_queue = %s\n", + netif_queue_stopped(devdata->netdev) ? + "stopped" : "running"); + } + bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos); + kfree(vbuf); + return bytes_read; +} + +static ssize_t enable_ints_write(struct file *file, + const char __user *buffer, + size_t count, loff_t *ppos) +{ + char buf[4]; + int i, new_value; + struct visornic_devdata *devdata; + + if (count >= ARRAY_SIZE(buf)) + return -EINVAL; + + buf[count] = '\0'; + if (copy_from_user(buf, buffer, count)) + return -EFAULT; + + i = kstrtoint(buf, 10, &new_value); + if (i != 0) + return -EFAULT; + + /* set all counts to new_value usually 0 */ + for (i = 0; i < VISORNICSOPENMAX; i++) { + if (num_visornic_open[i]) { + devdata = netdev_priv(num_visornic_open[i]); + /* TODO update features bit in channel */ + } + } + + return count; +} + +/** + * visornic_serverdown_complete - IOPART went down, need to pause + * device + * @work: Work queue it was scheduled on + * + * The IO partition has gone down and we need to do some cleanup + * for when it comes back. Treat the IO partition as the link + * being down. + * Returns void. + */ +static void +visornic_serverdown_complete(struct work_struct *work) +{ + struct visornic_devdata *devdata; + struct net_device *netdev; + unsigned long flags; + int i = 0, count = 0; + + devdata = container_of(work, struct visornic_devdata, + serverdown_completion); + netdev = devdata->netdev; + + /* Stop using datachan */ + visor_thread_stop(&devdata->threadinfo); + + /* Inform Linux that the link is down */ + netif_carrier_off(netdev); + netif_stop_queue(netdev); + + /* Free the skb for XMITs that haven't been serviced by the server + * We shouldn't have to inform Linux about these IOs because they + * are "lost in the ethernet" + */ + skb_queue_purge(&devdata->xmitbufhead); + + spin_lock_irqsave(&devdata->priv_lock, flags); + /* free rcv buffers */ + for (i = 0; i < devdata->num_rcv_bufs; i++) { + if (devdata->rcvbuf[i]) { + kfree_skb(devdata->rcvbuf[i]); + devdata->rcvbuf[i] = NULL; + count++; + } + } + atomic_set(&devdata->num_rcvbuf_in_iovm, 0); + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + devdata->server_down = true; + devdata->server_change_state = false; +} + +/** + * visornic_serverdown - Command has notified us that IOPARt is down + * @devdata: device that is being managed by IOPART + * + * Schedule the work needed to handle the server down request. Make + * sure we haven't already handled the server change state event. + * Returns 0 if we scheduled the work, -EINVAL on error. + */ +static int +visornic_serverdown(struct visornic_devdata *devdata) +{ + if (!devdata->server_down && !devdata->server_change_state) { + devdata->server_change_state = true; + queue_work(visornic_serverdown_workqueue, + &devdata->serverdown_completion); + } else if (devdata->server_change_state) { + return -EINVAL; + } + return 0; +} + +/** + * alloc_rcv_buf - alloc rcv buffer to be given to the IO Partition. + * @netdev: network adapter the rcv bufs are attached too. + * + * Create an sk_buff (rcv_buf) that will be passed to the IO Partition + * so that it can write rcv data into our memory space. + * Return pointer to sk_buff + */ +static struct sk_buff * +alloc_rcv_buf(struct net_device *netdev) +{ + struct sk_buff *skb; + + /* NOTE: the first fragment in each rcv buffer is pointed to by + * rcvskb->data. For now all rcv buffers will be RCVPOST_BUF_SIZE + * in length, so the firstfrag is large enough to hold 1514. + */ + skb = alloc_skb(RCVPOST_BUF_SIZE, GFP_ATOMIC); + if (!skb) + return NULL; + skb->dev = netdev; + skb->len = RCVPOST_BUF_SIZE; + /* current value of mtu doesn't come into play here; large + * packets will just end up using multiple rcv buffers all of + * same size + */ + skb->data_len = 0; /* dev_alloc_skb already zeroes it out + * for clarification. + */ + return skb; +} + +/** + * post_skb - post a skb to the IO Partition. + * @cmdrsp: cmdrsp packet to be send to the IO Partition + * @devdata: visornic_devdata to post the skb too + * @skb: skb to give to the IO partition + * + * Send the skb to the IO Partition. + * Returns void + */ +static inline void +post_skb(struct uiscmdrsp *cmdrsp, + struct visornic_devdata *devdata, struct sk_buff *skb) +{ + cmdrsp->net.buf = skb; + cmdrsp->net.rcvpost.frag.pi_pfn = page_to_pfn(virt_to_page(skb->data)); + cmdrsp->net.rcvpost.frag.pi_off = + (unsigned long)skb->data & PI_PAGE_MASK; + cmdrsp->net.rcvpost.frag.pi_len = skb->len; + cmdrsp->net.rcvpost.unique_num = devdata->uniquenum; + + if ((cmdrsp->net.rcvpost.frag.pi_off + skb->len) <= PI_PAGE_SIZE) { + cmdrsp->net.type = NET_RCV_POST; + cmdrsp->cmdtype = CMD_NET_TYPE; + visorchannel_signalinsert(devdata->dev->visorchannel, + IOCHAN_TO_IOPART, + cmdrsp); + atomic_inc(&devdata->num_rcvbuf_in_iovm); + devdata->chstat.sent_post++; + } +} + +/** + * send_enbdis - send NET_RCV_ENBDIS to IO Partition + * @netdev: netdevice we are enable/disable, used as context + * return value + * @state: enable = 1/disable = 0 + * @devdata: visornic device we are enabling/disabling + * + * Send the enable/disable message to the IO Partition. + * Returns void + */ +static void +send_enbdis(struct net_device *netdev, int state, + struct visornic_devdata *devdata) +{ + devdata->cmdrsp_rcv->net.enbdis.enable = state; + devdata->cmdrsp_rcv->net.enbdis.context = netdev; + devdata->cmdrsp_rcv->net.type = NET_RCV_ENBDIS; + devdata->cmdrsp_rcv->cmdtype = CMD_NET_TYPE; + visorchannel_signalinsert(devdata->dev->visorchannel, + IOCHAN_TO_IOPART, + devdata->cmdrsp_rcv); + devdata->chstat.sent_enbdis++; +} + +/** + * visornic_disable_with_timeout - Disable network adapter + * @netdev: netdevice to disale + * @timeout: timeout to wait for disable + * + * Disable the network adapter and inform the IO Partition that we + * are disabled, reclaim memory from rcv bufs. + * Returns 0 on success, negative for failure of IO Partition + * responding. + * + */ +static int +visornic_disable_with_timeout(struct net_device *netdev, const int timeout) +{ + struct visornic_devdata *devdata = netdev_priv(netdev); + int i; + unsigned long flags; + int wait = 0; + + /* stop the transmit queue so nothing more can be transmitted */ + netif_stop_queue(netdev); + + /* send a msg telling the other end we are stopping incoming pkts */ + spin_lock_irqsave(&devdata->priv_lock, flags); + devdata->enabled = 0; + devdata->enab_dis_acked = 0; /* must wait for ack */ + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + /* send disable and wait for ack -- don't hold lock when sending + * disable because if the queue is full, insert might sleep. + */ + send_enbdis(netdev, 0, devdata); + + /* wait for ack to arrive before we try to free rcv buffers + * NOTE: the other end automatically unposts the rcv buffers when + * when it gets a disable. + */ + spin_lock_irqsave(&devdata->priv_lock, flags); + while ((timeout == VISORNIC_INFINITE_RESPONSE_WAIT) || + (wait < timeout)) { + if (devdata->enab_dis_acked) + break; + if (devdata->server_down || devdata->server_change_state) { + spin_unlock_irqrestore(&devdata->priv_lock, flags); + return -EIO; + } + set_current_state(TASK_INTERRUPTIBLE); + spin_unlock_irqrestore(&devdata->priv_lock, flags); + wait += schedule_timeout(msecs_to_jiffies(10)); + spin_lock_irqsave(&devdata->priv_lock, flags); + } + + /* Wait for usage to go to 1 (no other users) before freeing + * rcv buffers + */ + if (atomic_read(&devdata->usage) > 1) { + while (1) { + set_current_state(TASK_INTERRUPTIBLE); + spin_unlock_irqrestore(&devdata->priv_lock, flags); + schedule_timeout(msecs_to_jiffies(10)); + spin_lock_irqsave(&devdata->priv_lock, flags); + if (atomic_read(&devdata->usage)) + break; + } + } + + /* we've set enabled to 0, so we can give up the lock. */ + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + /* Free rcv buffers - other end has automatically unposed them on + * disable + */ + for (i = 0; i < devdata->num_rcv_bufs; i++) { + if (devdata->rcvbuf[i]) { + kfree_skb(devdata->rcvbuf[i]); + devdata->rcvbuf[i] = NULL; + } + } + + /* remove references from array */ + for (i = 0; i < VISORNICSOPENMAX; i++) + if (num_visornic_open[i] == netdev) { + num_visornic_open[i] = NULL; + break; + } + + return 0; +} + +/** + * init_rcv_bufs -- initialize receive bufs and send them to the IO Part + * @netdev: struct netdevice + * @devdata: visornic_devdata + * + * Allocate rcv buffers and post them to the IO Partition. + * Return 0 for success, and negative for failure. + */ +static int +init_rcv_bufs(struct net_device *netdev, struct visornic_devdata *devdata) +{ + int i, count; + + /* allocate fixed number of receive buffers to post to uisnic + * post receive buffers after we've allocated a required amount + */ + for (i = 0; i < devdata->num_rcv_bufs; i++) { + devdata->rcvbuf[i] = alloc_rcv_buf(netdev); + if (!devdata->rcvbuf[i]) + break; /* if we failed to allocate one let us stop */ + } + if (i == 0) /* couldn't even allocate one -- bail out */ + return -ENOMEM; + count = i; + + /* Ensure we can alloc 2/3rd of the requeested number of buffers. + * 2/3 is an arbitrary choice; used also in ndis init.c + */ + if (count < ((2 * devdata->num_rcv_bufs) / 3)) { + /* free receive buffers we did alloc and then bail out */ + for (i = 0; i < count; i++) { + kfree_skb(devdata->rcvbuf[i]); + devdata->rcvbuf[i] = NULL; + } + return -ENOMEM; + } + + /* post receive buffers to receive incoming input - without holding + * lock - we've not enabled nor started the queue so there shouldn't + * be any rcv or xmit activity + */ + for (i = 0; i < count; i++) + post_skb(devdata->cmdrsp_rcv, devdata, devdata->rcvbuf[i]); + + return 0; +} + +/** + * visornic_enable_with_timeout - send enable to IO Part + * @netdev: struct net_device + * @timeout: Time to wait for the ACK from the enable + * + * Sends enable to IOVM, inits, and posts receive buffers to IOVM + * timeout is defined in msecs (timeout of 0 specifies infinite wait) + * Return 0 for success, negavite for failure. + */ +static int +visornic_enable_with_timeout(struct net_device *netdev, const int timeout) +{ + int i; + struct visornic_devdata *devdata = netdev_priv(netdev); + unsigned long flags; + int wait = 0; + + /* NOTE: the other end automatically unposts the rcv buffers when it + * gets a disable. + */ + i = init_rcv_bufs(netdev, devdata); + if (i < 0) + return i; + + spin_lock_irqsave(&devdata->priv_lock, flags); + devdata->enabled = 1; + + /* now we're ready, let's send an ENB to uisnic but until we get + * an ACK back from uisnic, we'll drop the packets + */ + devdata->n_rcv_packets_not_accepted = 0; + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + /* send enable and wait for ack -- don't hold lock when sending enable + * because if the queue is full, insert might sleep. + */ + send_enbdis(netdev, 1, devdata); + + spin_lock_irqsave(&devdata->priv_lock, flags); + while ((timeout == VISORNIC_INFINITE_RESPONSE_WAIT) || + (wait < timeout)) { + if (devdata->enab_dis_acked) + break; + if (devdata->server_down || devdata->server_change_state) { + spin_unlock_irqrestore(&devdata->priv_lock, flags); + return -EIO; + } + set_current_state(TASK_INTERRUPTIBLE); + spin_unlock_irqrestore(&devdata->priv_lock, flags); + wait += schedule_timeout(msecs_to_jiffies(10)); + spin_lock_irqsave(&devdata->priv_lock, flags); + } + + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + if (!devdata->enab_dis_acked) + return -EIO; + + /* find an open slot in the array to save off VisorNic references + * for debug + */ + for (i = 0; i < VISORNICSOPENMAX; i++) { + if (!num_visornic_open[i]) { + num_visornic_open[i] = netdev; + break; + } + } + + return 0; +} + +/** + * visornic_timeout_reset - handle xmit timeout resets + * @work work item that scheduled the work + * + * Transmit Timeouts are typically handled by resetting the + * device for our virtual NIC we will send a Disable and Enable + * to the IOVM. If it doesn't respond we will trigger a serverdown. + */ +static void +visornic_timeout_reset(struct work_struct *work) +{ + struct visornic_devdata *devdata; + struct net_device *netdev; + int response = 0; + + devdata = container_of(work, struct visornic_devdata, timeout_reset); + netdev = devdata->netdev; + + netif_stop_queue(netdev); + response = visornic_disable_with_timeout(netdev, 100); + if (response) + goto call_serverdown; + + response = visornic_enable_with_timeout(netdev, 100); + if (response) + goto call_serverdown; + netif_wake_queue(netdev); + + return; + +call_serverdown: + visornic_serverdown(devdata); +} + +/** + * visornic_open - Enable the visornic device and mark the queue started + * @netdev: netdevice to start + * + * Enable the device and start the transmit queue. + * Return 0 for success + */ +static int +visornic_open(struct net_device *netdev) +{ + visornic_enable_with_timeout(netdev, VISORNIC_INFINITE_RESPONSE_WAIT); + + /* start the interface's transmit queue, allowing it to accept + * packets for transmission + */ + netif_start_queue(netdev); + + return 0; +} + +/** + * visornic_close - Disables the visornic device and stops the queues + * @netdev: netdevice to start + * + * Disable the device and stop the transmit queue. + * Return 0 for success + */ +static int +visornic_close(struct net_device *netdev) +{ + netif_stop_queue(netdev); + visornic_disable_with_timeout(netdev, VISORNIC_INFINITE_RESPONSE_WAIT); + + return 0; +} + +/** + * visornic_xmit - send a packet to the IO Partition + * @skb: Packet to be sent + * @netdev: net device the packet is being sent from + * + * Convert the skb to a cmdrsp so the IO Partition can undersand it. + * Send the XMIT command to the IO Partition for processing. This + * function is protected from concurrent calls by a spinlock xmit_lock + * in the net_device struct, but as soon as the function returns it + * can be called again. + * Returns NETDEV_TX_OK for success, NETDEV_TX_BUSY for error. + */ +static int +visornic_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + struct visornic_devdata *devdata; + int len, firstfraglen, padlen; + struct uiscmdrsp *cmdrsp = NULL; + unsigned long flags; + + devdata = netdev_priv(netdev); + spin_lock_irqsave(&devdata->priv_lock, flags); + + if (netif_queue_stopped(netdev) || devdata->server_down || + devdata->server_change_state) { + spin_unlock_irqrestore(&devdata->priv_lock, flags); + devdata->busy_cnt++; + return NETDEV_TX_BUSY; + } + + /* sk_buff struct is used to host network data throughout all the + * linux network subsystems + */ + len = skb->len; + + /* skb->len is the FULL length of data (including fragmentary portion) + * skb->data_len is the length of the fragment portion in frags + * skb->len - skb->data_len is size of the 1st fragment in skb->data + * calculate the length of the first fragment that skb->data is + * pointing to + */ + firstfraglen = skb->len - skb->data_len; + if (firstfraglen < ETH_HEADER_SIZE) { + spin_unlock_irqrestore(&devdata->priv_lock, flags); + devdata->busy_cnt++; + return NETDEV_TX_BUSY; + } + + if ((len < ETH_MIN_PACKET_SIZE) && + ((skb_end_pointer(skb) - skb->data) >= ETH_MIN_PACKET_SIZE)) { + /* pad the packet out to minimum size */ + padlen = ETH_MIN_PACKET_SIZE - len; + memset(&skb->data[len], 0, padlen); + skb->tail += padlen; + skb->len += padlen; + len += padlen; + firstfraglen += padlen; + } + + cmdrsp = devdata->xmit_cmdrsp; + /* clear cmdrsp */ + memset(cmdrsp, 0, SIZEOF_CMDRSP); + cmdrsp->net.type = NET_XMIT; + cmdrsp->cmdtype = CMD_NET_TYPE; + + /* save the pointer to skb -- we'll need it for completion */ + cmdrsp->net.buf = skb; + + if (((devdata->chstat.sent_xmit >= devdata->chstat.got_xmit_done) && + (devdata->chstat.sent_xmit - devdata->chstat.got_xmit_done >= + devdata->max_outstanding_net_xmits)) || + ((devdata->chstat.sent_xmit < devdata->chstat.got_xmit_done) && + (ULONG_MAX - devdata->chstat.got_xmit_done + + devdata->chstat.sent_xmit >= + devdata->max_outstanding_net_xmits))) { + /* too many NET_XMITs queued over to IOVM - need to wait + */ + devdata->chstat.reject_count++; + if (!devdata->queuefullmsg_logged && + ((devdata->chstat.reject_count & 0x3ff) == 1)) + devdata->queuefullmsg_logged = 1; + netif_stop_queue(netdev); + spin_unlock_irqrestore(&devdata->priv_lock, flags); + devdata->busy_cnt++; + return NETDEV_TX_BUSY; + } + if (devdata->queuefullmsg_logged) + devdata->queuefullmsg_logged = 0; + + if (skb->ip_summed == CHECKSUM_UNNECESSARY) { + cmdrsp->net.xmt.lincsum.valid = 1; + cmdrsp->net.xmt.lincsum.protocol = skb->protocol; + if (skb_transport_header(skb) > skb->data) { + cmdrsp->net.xmt.lincsum.hrawoff = + skb_transport_header(skb) - skb->data; + cmdrsp->net.xmt.lincsum.hrawoff = 1; + } + if (skb_network_header(skb) > skb->data) { + cmdrsp->net.xmt.lincsum.nhrawoff = + skb_network_header(skb) - skb->data; + cmdrsp->net.xmt.lincsum.nhrawoffv = 1; + } + cmdrsp->net.xmt.lincsum.csum = skb->csum; + } else { + cmdrsp->net.xmt.lincsum.valid = 0; + } + + /* save off the length of the entire data packet */ + cmdrsp->net.xmt.len = len; + + /* copy ethernet header from first frag into ocmdrsp + * - everything else will be pass in frags & DMA'ed + */ + memcpy(cmdrsp->net.xmt.ethhdr, skb->data, ETH_HEADER_SIZE); + /* copy frags info - from skb->data we need to only provide access + * beyond eth header + */ + cmdrsp->net.xmt.num_frags = + visor_copy_fragsinfo_from_skb(skb, firstfraglen, + MAX_PHYS_INFO, + cmdrsp->net.xmt.frags); + if (cmdrsp->net.xmt.num_frags == -1) { + spin_unlock_irqrestore(&devdata->priv_lock, flags); + devdata->busy_cnt++; + return NETDEV_TX_BUSY; + } + + if (!visorchannel_signalinsert(devdata->dev->visorchannel, + IOCHAN_TO_IOPART, cmdrsp)) { + netif_stop_queue(netdev); + spin_unlock_irqrestore(&devdata->priv_lock, flags); + devdata->busy_cnt++; + return NETDEV_TX_BUSY; + } + + /* Track the skbs that have been sent to the IOVM for XMIT */ + skb_queue_head(&devdata->xmitbufhead, skb); + + /* set the last transmission start time + * linux doc says: Do not forget to update netdev->trans_start to + * jiffies after each new tx packet is given to the hardware. + */ + netdev->trans_start = jiffies; + + /* update xmt stats */ + devdata->net_stats.tx_packets++; + devdata->net_stats.tx_bytes += skb->len; + devdata->chstat.sent_xmit++; + + /* check to see if we have hit the high watermark for + * netif_stop_queue() + */ + if (((devdata->chstat.sent_xmit >= devdata->chstat.got_xmit_done) && + (devdata->chstat.sent_xmit - devdata->chstat.got_xmit_done >= + devdata->upper_threshold_net_xmits)) || + ((devdata->chstat.sent_xmit < devdata->chstat.got_xmit_done) && + (ULONG_MAX - devdata->chstat.got_xmit_done + + devdata->chstat.sent_xmit >= + devdata->upper_threshold_net_xmits))) { + /* too many NET_XMITs queued over to IOVM - need to wait */ + netif_stop_queue(netdev); /* calling stop queue - call + * netif_wake_queue() after lower + * threshold + */ + devdata->flow_control_upper_hits++; + } + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + /* skb will be freed when we get back NET_XMIT_DONE */ + return NETDEV_TX_OK; +} + +/** + * visornic_get_stats - returns net_stats of the visornic device + * @netdev: netdevice + * + * Returns the net_device_stats for the device + */ +static struct net_device_stats * +visornic_get_stats(struct net_device *netdev) +{ + struct visornic_devdata *devdata = netdev_priv(netdev); + + return &devdata->net_stats; +} + +/** + * visornic_ioctl - ioctl function for netdevice. + * @netdev: netdevice + * @ifr: ignored + * @cmd: ignored + * + * Currently not supported. + * Returns EOPNOTSUPP + */ +static int +visornic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + return -EOPNOTSUPP; +} + +/** + * visornic_change_mtu - changes mtu of device. + * @netdev: netdevice + * @new_mtu: value of new mtu + * + * MTU cannot be changed by system, must be changed via + * CONTROLVM message. All vnics and pnics in a switch have + * to have the same MTU for everything to work. + * Currently not supported. + * Returns EINVAL + */ +static int +visornic_change_mtu(struct net_device *netdev, int new_mtu) +{ + return -EINVAL; +} + +/** + * visornic_set_multi - changes mtu of device. + * @netdev: netdevice + * + * Only flag we support currently is IFF_PROMISC + * Returns void + */ +static void +visornic_set_multi(struct net_device *netdev) +{ + struct uiscmdrsp *cmdrsp; + struct visornic_devdata *devdata = netdev_priv(netdev); + + /* any filtering changes */ + if (devdata->old_flags != netdev->flags) { + if ((netdev->flags & IFF_PROMISC) != + (devdata->old_flags & IFF_PROMISC)) { + cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC); + if (!cmdrsp) + return; + cmdrsp->cmdtype = CMD_NET_TYPE; + cmdrsp->net.type = NET_RCV_PROMISC; + cmdrsp->net.enbdis.context = netdev; + cmdrsp->net.enbdis.enable = + (netdev->flags & IFF_PROMISC); + visorchannel_signalinsert(devdata->dev->visorchannel, + IOCHAN_TO_IOPART, + cmdrsp); + kfree(cmdrsp); + } + devdata->old_flags = netdev->flags; + } +} + +/** + * visornic_xmit_timeout - request to timeout the xmit + * @netdev + * + * Queue the work and return. Make sure we have not already + * been informed the IO Partition is gone, if it is gone + * we will already timeout the xmits. + */ +static void +visornic_xmit_timeout(struct net_device *netdev) +{ + struct visornic_devdata *devdata = netdev_priv(netdev); + unsigned long flags; + + spin_lock_irqsave(&devdata->priv_lock, flags); + /* Ensure that a ServerDown message hasn't been received */ + if (!devdata->enabled || + (devdata->server_down && !devdata->server_change_state)) { + spin_unlock_irqrestore(&devdata->priv_lock, flags); + return; + } + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + queue_work(visornic_timeout_reset_workqueue, &devdata->timeout_reset); +} + +/** + * repost_return - repost rcv bufs that have come back + * @cmdrsp: io channel command struct to post + * @devdata: visornic devdata for the device + * @skb: skb + * @netdev: netdevice + * + * Repost rcv buffers that have been returned to us when + * we are finished with them. + * Returns 0 for success, -1 for error. + */ +static inline int +repost_return(struct uiscmdrsp *cmdrsp, struct visornic_devdata *devdata, + struct sk_buff *skb, struct net_device *netdev) +{ + struct net_pkt_rcv copy; + int i = 0, cc, numreposted; + int found_skb = 0; + int status = 0; + + copy = cmdrsp->net.rcv; + switch (copy.numrcvbufs) { + case 0: + devdata->n_rcv0++; + break; + case 1: + devdata->n_rcv1++; + break; + case 2: + devdata->n_rcv2++; + break; + default: + devdata->n_rcvx++; + break; + } + for (cc = 0, numreposted = 0; cc < copy.numrcvbufs; cc++) { + for (i = 0; i < devdata->num_rcv_bufs; i++) { + if (devdata->rcvbuf[i] != copy.rcvbuf[cc]) + continue; + + if ((skb) && devdata->rcvbuf[i] == skb) { + devdata->found_repost_rcvbuf_cnt++; + found_skb = 1; + devdata->repost_found_skb_cnt++; + } + devdata->rcvbuf[i] = alloc_rcv_buf(netdev); + if (!devdata->rcvbuf[i]) { + devdata->num_rcv_bufs_could_not_alloc++; + devdata->alloc_failed_in_repost_rtn_cnt++; + status = -ENOMEM; + break; + } + post_skb(cmdrsp, devdata, devdata->rcvbuf[i]); + numreposted++; + break; + } + } + if (numreposted != copy.numrcvbufs) { + devdata->n_repost_deficit++; + status = -EINVAL; + } + if (skb) { + if (found_skb) { + kfree_skb(skb); + } else { + status = -EINVAL; + devdata->bad_rcv_buf++; + } + } + atomic_dec(&devdata->usage); + return status; +} + +/** + * visornic_rx - Handle receive packets coming back from IO Part + * @cmdrsp: Receive packet returned from IO Part + * + * Got a receive packet back from the IO Part, handle it and send + * it up the stack. + * Returns void + */ +static void +visornic_rx(struct uiscmdrsp *cmdrsp) +{ + struct visornic_devdata *devdata; + struct sk_buff *skb, *prev, *curr; + struct net_device *netdev; + int cc, currsize, off, status; + struct ethhdr *eth; + unsigned long flags; +#ifdef DEBUG + struct phys_info testfrags[MAX_PHYS_INFO]; +#endif + + /* post new rcv buf to the other end using the cmdrsp we have at hand + * post it without holding lock - but we'll use the signal lock to + * synchronize the queue insert the cmdrsp that contains the net.rcv + * is the one we are using to repost, so copy the info we need from it. + */ + skb = cmdrsp->net.buf; + netdev = skb->dev; + + if (!netdev) { + /* We must have previously downed this network device and + * this skb and device is no longer valid. This also means + * the skb reference was removed from devdata->rcvbuf so no + * need to search for it. + * All we can do is free the skb and return. + * Note: We crash if we try to log this here. + */ + kfree_skb(skb); + return; + } + + devdata = netdev_priv(netdev); + + spin_lock_irqsave(&devdata->priv_lock, flags); + atomic_dec(&devdata->num_rcvbuf_in_iovm); + + /* update rcv stats - call it with priv_lock held */ + devdata->net_stats.rx_packets++; + devdata->net_stats.rx_bytes = skb->len; + + atomic_inc(&devdata->usage); /* don't want a close to happen before + * we're done here + */ + + /* set length to how much was ACTUALLY received - + * NOTE: rcv_done_len includes actual length of data rcvd + * including ethhdr + */ + skb->len = cmdrsp->net.rcv.rcv_done_len; + + /* test enabled while holding lock */ + if (!(devdata->enabled && devdata->enab_dis_acked)) { + /* don't process it unless we're in enable mode and until + * we've gotten an ACK saying the other end got our RCV enable + */ + spin_unlock_irqrestore(&devdata->priv_lock, flags); + repost_return(cmdrsp, devdata, skb, netdev); + return; + } + + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + /* when skb was allocated, skb->dev, skb->data, skb->len and + * skb->data_len were setup. AND, data has already put into the + * skb (both first frag and in frags pages) + * NOTE: firstfragslen is the amount of data in skb->data and that + * which is not in nr_frags or frag_list. This is now simply + * RCVPOST_BUF_SIZE. bump tail to show how much data is in + * firstfrag & set data_len to show rest see if we have to chain + * frag_list. + */ + if (skb->len > RCVPOST_BUF_SIZE) { /* do PRECAUTIONARY check */ + if (cmdrsp->net.rcv.numrcvbufs < 2) { + if (repost_return(cmdrsp, devdata, skb, netdev) < 0) + dev_err(&devdata->netdev->dev, + "repost_return failed"); + return; + } + /* length rcvd is greater than firstfrag in this skb rcv buf */ + skb->tail += RCVPOST_BUF_SIZE; /* amount in skb->data */ + skb->data_len = skb->len - RCVPOST_BUF_SIZE; /* amount that + will be in + frag_list */ + } else { + /* data fits in this skb - no chaining - do + * PRECAUTIONARY check + */ + if (cmdrsp->net.rcv.numrcvbufs != 1) { /* should be 1 */ + if (repost_return(cmdrsp, devdata, skb, netdev) < 0) + dev_err(&devdata->netdev->dev, + "repost_return failed"); + return; + } + skb->tail += skb->len; + skb->data_len = 0; /* nothing rcvd in frag_list */ + } + off = skb_tail_pointer(skb) - skb->data; + + /* amount we bumped tail by in the head skb + * it is used to calculate the size of each chained skb below + * it is also used to index into bufline to continue the copy + * (for chansocktwopc) + * if necessary chain the rcv skbs together. + * NOTE: index 0 has the same as cmdrsp->net.rcv.skb; we need to + * chain the rest to that one. + * - do PRECAUTIONARY check + */ + if (cmdrsp->net.rcv.rcvbuf[0] != skb) { + if (repost_return(cmdrsp, devdata, skb, netdev) < 0) + dev_err(&devdata->netdev->dev, "repost_return failed"); + return; + } + + if (cmdrsp->net.rcv.numrcvbufs > 1) { + /* chain the various rcv buffers into the skb's frag_list. */ + /* Note: off was initialized above */ + for (cc = 1, prev = NULL; + cc < cmdrsp->net.rcv.numrcvbufs; cc++) { + curr = (struct sk_buff *)cmdrsp->net.rcv.rcvbuf[cc]; + curr->next = NULL; + if (!prev) /* start of list- set head */ + skb_shinfo(skb)->frag_list = curr; + else + prev->next = curr; + prev = curr; + + /* should we set skb->len and skb->data_len for each + * buffer being chained??? can't hurt! + */ + currsize = min(skb->len - off, + (unsigned int)RCVPOST_BUF_SIZE); + curr->len = currsize; + curr->tail += currsize; + curr->data_len = 0; + off += currsize; + } +#ifdef DEBUG + /* assert skb->len == off */ + if (skb->len != off) { + dev_err(&devdata->netdev->dev, + "%s something wrong; skb->len:%d != off:%d\n", + netdev->name, skb->len, off); + } + /* test code */ + cc = util_copy_fragsinfo_from_skb("rcvchaintest", skb, + RCVPOST_BUF_SIZE, + MAX_PHYS_INFO, testfrags); + if (cc != cmdrsp->net.rcv.numrcvbufs) { + dev_err(&devdata->netdev->dev, + "**** %s Something wrong; rcvd chain length %d different from one we calculated %d\n", + netdev->name, cmdrsp->net.rcv.numrcvbufs, cc); + } + for (i = 0; i < cc; i++) { + dev_inf(&devdata->netdev->dev, + "test:RCVPOST_BUF_SIZE:%d[%d] pfn:%llu off:0x%x len:%d\n", + RCVPOST_BUF_SIZE, i, testfrags[i].pi_pfn, + testfrags[i].pi_off, testfrags[i].pi_len); + } +#endif + } + + /* set up packet's protocl type using ethernet header - this + * sets up skb->pkt_type & it also PULLS out the eth header + */ + skb->protocol = eth_type_trans(skb, netdev); + + eth = eth_hdr(skb); + + skb->csum = 0; + skb->ip_summed = CHECKSUM_NONE; + + do { + if (netdev->flags & IFF_PROMISC) + break; /* accept all packets */ + if (skb->pkt_type == PACKET_BROADCAST) { + if (netdev->flags & IFF_BROADCAST) + break; /* accept all broadcast packets */ + } else if (skb->pkt_type == PACKET_MULTICAST) { + if ((netdev->flags & IFF_MULTICAST) && + (netdev_mc_count(netdev))) { + struct netdev_hw_addr *ha; + int found_mc = 0; + + /* only accept multicast packets that we can + * find in our multicast address list + */ + netdev_for_each_mc_addr(ha, netdev) { + if (ether_addr_equal(eth->h_dest, + ha->addr)) { + found_mc = 1; + break; + } + } + if (found_mc) + break; /* accept packet, dest + matches a multicast + address */ + } + } else if (skb->pkt_type == PACKET_HOST) { + break; /* accept packet, h_dest must match vnic + mac address */ + } else if (skb->pkt_type == PACKET_OTHERHOST) { + /* something is not right */ + dev_err(&devdata->netdev->dev, + "**** FAILED to deliver rcv packet to OS; name:%s Dest:%pM VNIC:%pM\n", + netdev->name, eth->h_dest, netdev->dev_addr); + } + /* drop packet - don't forward it up to OS */ + devdata->n_rcv_packets_not_accepted++; + repost_return(cmdrsp, devdata, skb, netdev); + return; + } while (0); + + status = netif_rx(skb); + /* netif_rx returns various values, but "in practice most drivers + * ignore the return value + */ + + skb = NULL; + /* + * whether the packet got dropped or handled, the skb is freed by + * kernel code, so we shouldn't free it. but we should repost a + * new rcv buffer. + */ + repost_return(cmdrsp, devdata, skb, netdev); +} + +/** + * devdata_initialize - Initialize devdata structure + * @devdata: visornic_devdata structure to initialize + * #dev: visorbus_deviced it belongs to + * + * Setup initial values for the visornic based on channel and default + * values. + * Returns a pointer to the devdata if successful, else NULL + */ +static struct visornic_devdata * +devdata_initialize(struct visornic_devdata *devdata, struct visor_device *dev) +{ + int devnum = -1; + + if (!devdata) + return NULL; + memset(devdata, '\0', sizeof(struct visornic_devdata)); + spin_lock(&dev_num_pool_lock); + devnum = find_first_zero_bit(dev_num_pool, MAXDEVICES); + set_bit(devnum, dev_num_pool); + spin_unlock(&dev_num_pool_lock); + if (devnum == MAXDEVICES) + devnum = -1; + if (devnum < 0) { + kfree(devdata); + return NULL; + } + devdata->devnum = devnum; + devdata->dev = dev; + strncpy(devdata->name, dev_name(&dev->device), sizeof(devdata->name)); + kref_init(&devdata->kref); + spin_lock(&lock_all_devices); + list_add_tail(&devdata->list_all, &list_all_devices); + spin_unlock(&lock_all_devices); + return devdata; +} + +/** + * devdata_release - Frees up a devdata + * @mykref: kref to the devdata + * + * Frees up a devdata. + * Returns void + */ +static void devdata_release(struct kref *mykref) +{ + struct visornic_devdata *devdata = + container_of(mykref, struct visornic_devdata, kref); + + spin_lock(&dev_num_pool_lock); + clear_bit(devdata->devnum, dev_num_pool); + spin_unlock(&dev_num_pool_lock); + spin_lock(&lock_all_devices); + list_del(&devdata->list_all); + spin_unlock(&lock_all_devices); + kfree(devdata); +} + +static const struct net_device_ops visornic_dev_ops = { + .ndo_open = visornic_open, + .ndo_stop = visornic_close, + .ndo_start_xmit = visornic_xmit, + .ndo_get_stats = visornic_get_stats, + .ndo_do_ioctl = visornic_ioctl, + .ndo_change_mtu = visornic_change_mtu, + .ndo_tx_timeout = visornic_xmit_timeout, + .ndo_set_rx_mode = visornic_set_multi, +}; + +/** + * send_rcv_posts_if_needed + * @devdata: visornic device + * + * Send receive buffers to the IO Partition. + * Returns void + */ +static void +send_rcv_posts_if_needed(struct visornic_devdata *devdata) +{ + int i; + struct net_device *netdev; + struct uiscmdrsp *cmdrsp = devdata->cmdrsp_rcv; + int cur_num_rcv_bufs_to_alloc, rcv_bufs_allocated; + + /* don't do this until vnic is marked ready */ + if (!(devdata->enabled && devdata->enab_dis_acked)) + return; + + netdev = devdata->netdev; + rcv_bufs_allocated = 0; + /* this code is trying to prevent getting stuck here forever, + * but still retry it if you cant allocate them all this time. + */ + cur_num_rcv_bufs_to_alloc = devdata->num_rcv_bufs_could_not_alloc; + while (cur_num_rcv_bufs_to_alloc > 0) { + cur_num_rcv_bufs_to_alloc--; + for (i = 0; i < devdata->num_rcv_bufs; i++) { + if (devdata->rcvbuf[i]) + continue; + devdata->rcvbuf[i] = alloc_rcv_buf(netdev); + if (!devdata->rcvbuf[i]) { + devdata->alloc_failed_in_if_needed_cnt++; + break; + } + rcv_bufs_allocated++; + post_skb(cmdrsp, devdata, devdata->rcvbuf[i]); + devdata->chstat.extra_rcvbufs_sent++; + } + } + devdata->num_rcv_bufs_could_not_alloc -= rcv_bufs_allocated; +} + +/** + * draing_queue - drains the response queue + * @cmdrsp: io channel command response message + * @devdata: visornic device to drain + * + * Drain the respones queue of any responses from the IO partition. + * Process the responses as we get them. + * Returns when response queue is empty or when the threadd stops. + */ +static void +drain_queue(struct uiscmdrsp *cmdrsp, struct visornic_devdata *devdata) +{ + unsigned long flags; + struct net_device *netdev; + + /* drain queue */ + while (1) { + /* TODO: CLIENT ACQUIRE -- Don't really need this at the + * moment */ + if (!visorchannel_signalremove(devdata->dev->visorchannel, + IOCHAN_FROM_IOPART, + cmdrsp)) + break; /* queue empty */ + + switch (cmdrsp->net.type) { + case NET_RCV: + devdata->chstat.got_rcv++; + /* process incoming packet */ + visornic_rx(cmdrsp); + break; + case NET_XMIT_DONE: + spin_lock_irqsave(&devdata->priv_lock, flags); + devdata->chstat.got_xmit_done++; + if (cmdrsp->net.xmtdone.xmt_done_result) + devdata->chstat.xmit_fail++; + /* only call queue wake if we stopped it */ + netdev = ((struct sk_buff *)cmdrsp->net.buf)->dev; + /* ASSERT netdev == vnicinfo->netdev; */ + if ((netdev == devdata->netdev) && + netif_queue_stopped(netdev)) { + /* check to see if we have crossed + * the lower watermark for + * netif_wake_queue() + */ + if (((devdata->chstat.sent_xmit >= + devdata->chstat.got_xmit_done) && + (devdata->chstat.sent_xmit - + devdata->chstat.got_xmit_done <= + devdata->lower_threshold_net_xmits)) || + ((devdata->chstat.sent_xmit < + devdata->chstat.got_xmit_done) && + (ULONG_MAX - devdata->chstat.got_xmit_done + + devdata->chstat.sent_xmit <= + devdata->lower_threshold_net_xmits))) { + /* enough NET_XMITs completed + * so can restart netif queue + */ + netif_wake_queue(netdev); + devdata->flow_control_lower_hits++; + } + } + skb_unlink(cmdrsp->net.buf, &devdata->xmitbufhead); + spin_unlock_irqrestore(&devdata->priv_lock, flags); + kfree_skb(cmdrsp->net.buf); + break; + case NET_RCV_ENBDIS_ACK: + devdata->chstat.got_enbdisack++; + netdev = (struct net_device *) + cmdrsp->net.enbdis.context; + spin_lock_irqsave(&devdata->priv_lock, flags); + devdata->enab_dis_acked = 1; + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + if (devdata->server_down && + devdata->server_change_state) { + /* Inform Linux that the link is up */ + devdata->server_down = false; + devdata->server_change_state = false; + netif_wake_queue(netdev); + netif_carrier_on(netdev); + } + break; + case NET_CONNECT_STATUS: + netdev = devdata->netdev; + if (cmdrsp->net.enbdis.enable == 1) { + spin_lock_irqsave(&devdata->priv_lock, flags); + devdata->enabled = cmdrsp->net.enbdis.enable; + spin_unlock_irqrestore(&devdata->priv_lock, + flags); + netif_wake_queue(netdev); + netif_carrier_on(netdev); + } else { + netif_stop_queue(netdev); + netif_carrier_off(netdev); + spin_lock_irqsave(&devdata->priv_lock, flags); + devdata->enabled = cmdrsp->net.enbdis.enable; + spin_unlock_irqrestore(&devdata->priv_lock, + flags); + } + break; + default: + break; + } + /* cmdrsp is now available for reuse */ + + if (kthread_should_stop()) + break; + } +} + +/** + * process_incoming_rsps - Checks the status of the response queue. + * @v: void pointer to the visronic devdata + * + * Main function of the vnic_incoming thread. Peridocially check the + * response queue and drain it if needed. + * Returns when thread has stopped. + */ +static int +process_incoming_rsps(void *v) +{ + struct visornic_devdata *devdata = v; + struct uiscmdrsp *cmdrsp = NULL; + const int SZ = SIZEOF_CMDRSP; + + cmdrsp = kmalloc(SZ, GFP_ATOMIC); + if (!cmdrsp) + complete_and_exit(&devdata->threadinfo.has_stopped, 0); + + while (1) { + wait_event_interruptible_timeout( + devdata->rsp_queue, (atomic_read( + &devdata->interrupt_rcvd) == 1), + msecs_to_jiffies(devdata->thread_wait_ms)); + + /* periodically check to see if there are any rcf bufs which + * need to get sent to the IOSP. This can only happen if + * we run out of memory when trying to allocate skbs. + */ + atomic_set(&devdata->interrupt_rcvd, 0); + send_rcv_posts_if_needed(devdata); + drain_queue(cmdrsp, devdata); + if (kthread_should_stop()) + break; + } + + kfree(cmdrsp); + complete_and_exit(&devdata->threadinfo.has_stopped, 0); +} + +/** + * visornic_probe - probe function for visornic devices + * @dev: The visor device discovered + * + * Called when visorbus discovers a visornic device on its + * bus. It creates a new visornic ethernet adapter. + * Returns 0 or negative for error. + */ +static int visornic_probe(struct visor_device *dev) +{ + struct visornic_devdata *devdata = NULL; + struct net_device *netdev = NULL; + int err; + int channel_offset = 0; + u64 features; + + netdev = alloc_etherdev(sizeof(struct visornic_devdata)); + if (!netdev) + return -ENOMEM; + + netdev->netdev_ops = &visornic_dev_ops; + netdev->watchdog_timeo = (5 * HZ); + netdev->dev.parent = &dev->device; + + /* Get MAC adddress from channel and read it into the device. */ + netdev->addr_len = ETH_ALEN; + channel_offset = offsetof(struct spar_io_channel_protocol, + vnic.macaddr); + err = visorbus_read_channel(dev, channel_offset, netdev->dev_addr, + ETH_ALEN); + if (err < 0) + goto cleanup_netdev; + + devdata = devdata_initialize(netdev_priv(netdev), dev); + if (!devdata) { + err = -ENOMEM; + goto cleanup_netdev; + } + + devdata->netdev = netdev; + init_waitqueue_head(&devdata->rsp_queue); + spin_lock_init(&devdata->priv_lock); + devdata->enabled = 0; /* not yet */ + atomic_set(&devdata->usage, 1); + + /* Setup rcv bufs */ + channel_offset = offsetof(struct spar_io_channel_protocol, + vnic.num_rcv_bufs); + err = visorbus_read_channel(dev, channel_offset, + &devdata->num_rcv_bufs, 4); + if (err) + goto cleanup_netdev; + + devdata->rcvbuf = kmalloc(sizeof(struct sk_buff *) * + devdata->num_rcv_bufs, GFP_KERNEL); + if (!devdata->rcvbuf) { + err = -ENOMEM; + goto cleanup_rcvbuf; + } + + /* set the net_xmit outstanding threshold */ + /* always leave two slots open but you should have 3 at a minimum */ + devdata->max_outstanding_net_xmits = + max(3, ((devdata->num_rcv_bufs / 3) - 2)); + devdata->upper_threshold_net_xmits = + max(2, devdata->max_outstanding_net_xmits - 1); + devdata->lower_threshold_net_xmits = + max(1, devdata->max_outstanding_net_xmits / 2); + + skb_queue_head_init(&devdata->xmitbufhead); + + /* create a cmdrsp we can use to post and unpost rcv buffers */ + devdata->cmdrsp_rcv = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC); + if (!devdata->cmdrsp_rcv) { + err = -ENOMEM; + goto cleanup_cmdrsp_rcv; + } + devdata->xmit_cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC); + if (!devdata->xmit_cmdrsp) { + err = -ENOMEM; + goto cleanup_xmit_cmdrsp; + } + INIT_WORK(&devdata->serverdown_completion, + visornic_serverdown_complete); + INIT_WORK(&devdata->timeout_reset, visornic_timeout_reset); + devdata->server_down = false; + devdata->server_change_state = false; + + /*set the default mtu */ + channel_offset = offsetof(struct spar_io_channel_protocol, + vnic.mtu); + err = visorbus_read_channel(dev, channel_offset, &netdev->mtu, 4); + if (err) + goto cleanup_xmit_cmdrsp; + + /* TODO: Setup Interrupt information */ + /* Let's start our threads to get responses */ + channel_offset = offsetof(struct spar_io_channel_protocol, + channel_header.features); + err = visorbus_read_channel(dev, channel_offset, &features, 8); + if (err) + goto cleanup_xmit_cmdrsp; + + features |= ULTRA_IO_CHANNEL_IS_POLLING; + err = visorbus_write_channel(dev, channel_offset, &features, 8); + if (err) + goto cleanup_xmit_cmdrsp; + + devdata->thread_wait_ms = 2; + visor_thread_start(&devdata->threadinfo, process_incoming_rsps, + devdata, "vnic_incoming"); + + err = register_netdev(netdev); + if (err) + goto cleanup_thread_stop; + + /* create debgug/sysfs directories */ + devdata->eth_debugfs_dir = debugfs_create_dir(netdev->name, + visornic_debugfs_dir); + if (!devdata->eth_debugfs_dir) { + err = -ENOMEM; + goto cleanup_thread_stop; + } + + return 0; + +cleanup_thread_stop: + visor_thread_stop(&devdata->threadinfo); + +cleanup_xmit_cmdrsp: + kfree(devdata->xmit_cmdrsp); + +cleanup_cmdrsp_rcv: + kfree(devdata->cmdrsp_rcv); + +cleanup_rcvbuf: + kfree(devdata->rcvbuf); + +cleanup_netdev: + free_netdev(netdev); + return err; +} + +/** + * host_side_disappeared - IO part is gone. + * @devdata: device object + * + * IO partition servicing this device is gone, do cleanup + * Returns void. + */ +static void host_side_disappeared(struct visornic_devdata *devdata) +{ + unsigned long flags; + + spin_lock_irqsave(&devdata->priv_lock, flags); + sprintf(devdata->name, "<dev#%d-history>", devdata->devnum); + devdata->dev = NULL; /* indicate device destroyed */ + spin_unlock_irqrestore(&devdata->priv_lock, flags); +} + +/** + * visornic_remove - Called when visornic dev goes away + * @dev: visornic device that is being removed + * + * Called when DEVICE_DESTROY gets called to remove device. + * Returns void + */ +static void visornic_remove(struct visor_device *dev) +{ + struct visornic_devdata *devdata = dev_get_drvdata(&dev->device); + + if (!devdata) + return; + dev_set_drvdata(&dev->device, NULL); + host_side_disappeared(devdata); + kref_put(&devdata->kref, devdata_release); +} + +/** + * visornic_pause - Called when IO Part disappears + * @dev: visornic device that is being serviced + * @complete_func: call when finished. + * + * Called when the IO Partition has gone down. Need to free + * up resources and wait for IO partition to come back. Mark + * link as down and don't attempt any DMA. When we have freed + * memory call the complete_func so that Command knows we are + * done. If we don't call complete_func, IO part will never + * come back. + * Returns 0 for success. + */ +static int visornic_pause(struct visor_device *dev, + visorbus_state_complete_func complete_func) +{ + struct visornic_devdata *devdata = dev_get_drvdata(&dev->device); + + visornic_serverdown(devdata); + complete_func(dev, 0); + return 0; +} + +/** + * visornic_resume - Called when IO part has recovered + * @dev: visornic device that is being serviced + * @compelte_func: call when finished + * + * Called when the IO partition has recovered. Reestablish + * connection to the IO part and set the link up. Okay to do + * DMA again. + * Returns 0 for success. + */ +static int visornic_resume(struct visor_device *dev, + visorbus_state_complete_func complete_func) +{ + struct visornic_devdata *devdata; + struct net_device *netdev; + unsigned long flags; + + devdata = dev_get_drvdata(&dev->device); + if (!devdata) + return -EINVAL; + + netdev = devdata->netdev; + + if (devdata->server_down && !devdata->server_change_state) { + devdata->server_change_state = true; + /* Must transition channel to ATTACHED state BEFORE + * we can start using the device again. + * TODO: State transitions + */ + visor_thread_start(&devdata->threadinfo, process_incoming_rsps, + devdata, "vnic_incoming"); + init_rcv_bufs(netdev, devdata); + spin_lock_irqsave(&devdata->priv_lock, flags); + devdata->enabled = 1; + + /* Now we're ready, let's send an ENB to uisnic but until + * we get an ACK back from uisnic, we'll drop the packets + */ + devdata->enab_dis_acked = 0; + spin_unlock_irqrestore(&devdata->priv_lock, flags); + + /* send enable and wait for ack - don't hold lock when + * sending enable because if the queue if sull, insert + * might sleep. + */ + send_enbdis(netdev, 1, devdata); + } else if (devdata->server_change_state) { + return -EIO; + } + + complete_func(dev, 0); + return 0; +} + +/** + * visornic_init - Init function + * + * Init function for the visornic driver. Do initial driver setup + * and wait for devices. + * Returns 0 for success, negative for error. + */ +static int visornic_init(void) +{ + struct dentry *ret; + int err = -ENOMEM; + + /* create workqueue for serverdown completion */ + visornic_serverdown_workqueue = + create_singlethread_workqueue("visornic_serverdown"); + if (!visornic_serverdown_workqueue) + return -ENOMEM; + + /* create workqueue for tx timeout reset */ + visornic_timeout_reset_workqueue = + create_singlethread_workqueue("visornic_timeout_reset"); + if (!visornic_timeout_reset_workqueue) + return -ENOMEM; + + visornic_debugfs_dir = debugfs_create_dir("visornic", NULL); + if (!visornic_debugfs_dir) + return err; + + ret = debugfs_create_file("info", S_IRUSR, visornic_debugfs_dir, NULL, + &debugfs_info_fops); + if (!ret) + goto cleanup_debugfs; + ret = debugfs_create_file("enable_ints", S_IWUSR, visornic_debugfs_dir, + NULL, &debugfs_enable_ints_fops); + if (!ret) + goto cleanup_debugfs; + + /* create workqueue for serverdown completion */ + visornic_serverdown_workqueue = + create_singlethread_workqueue("visornic_serverdown"); + if (!visornic_serverdown_workqueue) + goto cleanup_debugfs; + + /* create workqueue for tx timeout reset */ + visornic_timeout_reset_workqueue = + create_singlethread_workqueue("visornic_timeout_reset"); + if (!visornic_timeout_reset_workqueue) + goto cleanup_workqueue; + + spin_lock_init(&dev_num_pool_lock); + dev_num_pool = kzalloc(BITS_TO_LONGS(MAXDEVICES), GFP_KERNEL); + if (!dev_num_pool) + goto cleanup_workqueue; + + visorbus_register_visor_driver(&visornic_driver); + return 0; + +cleanup_workqueue: + flush_workqueue(visornic_serverdown_workqueue); + destroy_workqueue(visornic_serverdown_workqueue); + if (visornic_timeout_reset_workqueue) { + flush_workqueue(visornic_timeout_reset_workqueue); + destroy_workqueue(visornic_timeout_reset_workqueue); + } +cleanup_debugfs: + debugfs_remove_recursive(visornic_debugfs_dir); + + return err; +} + +/** + * visornic_cleanup - driver exit routine + * + * Unregister driver from the bus and free up memory. + */ +static void visornic_cleanup(void) +{ + if (visornic_serverdown_workqueue) { + flush_workqueue(visornic_serverdown_workqueue); + destroy_workqueue(visornic_serverdown_workqueue); + } + if (visornic_timeout_reset_workqueue) { + flush_workqueue(visornic_timeout_reset_workqueue); + destroy_workqueue(visornic_timeout_reset_workqueue); + } + debugfs_remove_recursive(visornic_debugfs_dir); + + visorbus_unregister_visor_driver(&visornic_driver); + kfree(dev_num_pool); + dev_num_pool = NULL; +} + +module_init(visornic_init); +module_exit(visornic_cleanup); + +MODULE_AUTHOR("Unisys"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("sPAR nic driver for sparlinux: ver 1.0.0.0"); +MODULE_VERSION("1.0.0.0"); diff --git a/drivers/staging/unisys/visorutil/Kconfig b/drivers/staging/unisys/visorutil/Kconfig deleted file mode 100644 index be9c2cf89..000000000 --- a/drivers/staging/unisys/visorutil/Kconfig +++ /dev/null @@ -1,9 +0,0 @@ -# -# Unisys timskmod configuration -# - -config UNISYS_VISORUTIL - tristate "Unisys visorutil driver" - ---help--- - If you say Y here, you will enable the Unisys visorutil driver. - diff --git a/drivers/staging/unisys/visorutil/Makefile b/drivers/staging/unisys/visorutil/Makefile deleted file mode 100644 index d9ab5a36e..000000000 --- a/drivers/staging/unisys/visorutil/Makefile +++ /dev/null @@ -1,9 +0,0 @@ -# -# Makefile for Unisys timskmod -# - -obj-$(CONFIG_UNISYS_VISORUTIL) += visorutil.o - -visorutil-y := charqueue.o periodic_work.o memregion_direct.o visorkmodutils.o - -ccflags-y += -Idrivers/staging/unisys/include diff --git a/drivers/staging/unisys/visorutil/charqueue.c b/drivers/staging/unisys/visorutil/charqueue.c deleted file mode 100644 index c91752a2d..000000000 --- a/drivers/staging/unisys/visorutil/charqueue.c +++ /dev/null @@ -1,127 +0,0 @@ -/* charqueue.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * Simple character queue implementation for Linux kernel mode. - */ - -#include "charqueue.h" - -#define MYDRVNAME "charqueue" - -#define IS_EMPTY(charqueue) (charqueue->head == charqueue->tail) - -struct charqueue { - int alloc_size; - int nslots; - spinlock_t lock; /* read/write lock for this structure */ - int head, tail; - unsigned char buf[0]; -}; - -struct charqueue *visor_charqueue_create(ulong nslots) -{ - int alloc_size = sizeof(struct charqueue) + nslots + 1; - struct charqueue *cq; - - cq = kmalloc(alloc_size, GFP_KERNEL|__GFP_NORETRY); - if (cq == NULL) - return NULL; - cq->alloc_size = alloc_size; - cq->nslots = nslots; - cq->head = 0; - cq->tail = 0; - spin_lock_init(&cq->lock); - return cq; -} -EXPORT_SYMBOL_GPL(visor_charqueue_create); - -void visor_charqueue_enqueue(struct charqueue *charqueue, unsigned char c) -{ - int alloc_slots = charqueue->nslots+1; /* 1 slot is always empty */ - - spin_lock(&charqueue->lock); - charqueue->head = (charqueue->head+1) % alloc_slots; - if (charqueue->head == charqueue->tail) - /* overflow; overwrite the oldest entry */ - charqueue->tail = (charqueue->tail+1) % alloc_slots; - charqueue->buf[charqueue->head] = c; - spin_unlock(&charqueue->lock); -} -EXPORT_SYMBOL_GPL(visor_charqueue_enqueue); - -BOOL visor_charqueue_is_empty(struct charqueue *charqueue) -{ - BOOL b; - - spin_lock(&charqueue->lock); - b = IS_EMPTY(charqueue); - spin_unlock(&charqueue->lock); - return b; -} -EXPORT_SYMBOL_GPL(visor_charqueue_is_empty); - -static int charqueue_dequeue_1(struct charqueue *charqueue) -{ - int alloc_slots = charqueue->nslots + 1; /* 1 slot is always empty */ - - if (IS_EMPTY(charqueue)) - return -1; - charqueue->tail = (charqueue->tail+1) % alloc_slots; - return charqueue->buf[charqueue->tail]; -} - -int charqueue_dequeue(struct charqueue *charqueue) -{ - int rc; - - spin_lock(&charqueue->lock); - rc = charqueue_dequeue_1(charqueue); - spin_unlock(&charqueue->lock); - return rc; -} - -int visor_charqueue_dequeue_n(struct charqueue *charqueue, unsigned char *buf, - int n) -{ - int rc, counter = 0, c; - - spin_lock(&charqueue->lock); - for (;;) { - if (n <= 0) - break; /* no more buffer space */ - c = charqueue_dequeue_1(charqueue); - if (c < 0) - break; /* no more input */ - *buf = (unsigned char)(c); - buf++; - n--; - counter++; - } - rc = counter; - spin_unlock(&charqueue->lock); - return rc; -} -EXPORT_SYMBOL_GPL(visor_charqueue_dequeue_n); - -void visor_charqueue_destroy(struct charqueue *charqueue) -{ - if (charqueue == NULL) - return; - kfree(charqueue); -} -EXPORT_SYMBOL_GPL(visor_charqueue_destroy); diff --git a/drivers/staging/unisys/visorutil/charqueue.h b/drivers/staging/unisys/visorutil/charqueue.h deleted file mode 100644 index f46a776b9..000000000 --- a/drivers/staging/unisys/visorutil/charqueue.h +++ /dev/null @@ -1,37 +0,0 @@ -/* charqueue.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __CHARQUEUE_H__ -#define __CHARQUEUE_H__ - -#include "timskmod.h" - -/* struct charqueue is an opaque structure to users. - * Fields are declared only in the implementation .c files. - */ -struct charqueue; - -struct charqueue *visor_charqueue_create(ulong nslots); -void visor_charqueue_enqueue(struct charqueue *charqueue, unsigned char c); -int charqueue_dequeue(struct charqueue *charqueue); -int visor_charqueue_dequeue_n(struct charqueue *charqueue, unsigned char *buf, - int n); -BOOL visor_charqueue_is_empty(struct charqueue *charqueue); -void visor_charqueue_destroy(struct charqueue *charqueue); - -#endif - diff --git a/drivers/staging/unisys/visorutil/memregion.h b/drivers/staging/unisys/visorutil/memregion.h deleted file mode 100644 index 0c3eebcf6..000000000 --- a/drivers/staging/unisys/visorutil/memregion.h +++ /dev/null @@ -1,43 +0,0 @@ -/* memregion.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __MEMREGION_H__ -#define __MEMREGION_H__ - -#include "timskmod.h" - -/* struct memregion is an opaque structure to users. - * Fields are declared only in the implementation .c files. - */ -struct memregion; - -struct memregion *visor_memregion_create(HOSTADDRESS physaddr, ulong nbytes); -struct memregion *visor_memregion_create_overlapped(struct memregion *parent, - ulong offset, ulong nbytes); -int visor_memregion_resize(struct memregion *memregion, ulong newsize); -int visor_memregion_read(struct memregion *memregion, - ulong offset, void *dest, ulong nbytes); -int visor_memregion_write(struct memregion *memregion, - ulong offset, void *src, ulong nbytes); -void visor_memregion_destroy(struct memregion *memregion); -HOSTADDRESS visor_memregion_get_physaddr(struct memregion *memregion); -ulong visor_memregion_get_nbytes(struct memregion *memregion); -void memregion_dump(struct memregion *memregion, char *s, - ulong off, ulong len, struct seq_file *seq); -void __iomem *visor_memregion_get_pointer(struct memregion *memregion); - -#endif diff --git a/drivers/staging/unisys/visorutil/memregion_direct.c b/drivers/staging/unisys/visorutil/memregion_direct.c deleted file mode 100644 index eb7422fbe..000000000 --- a/drivers/staging/unisys/visorutil/memregion_direct.c +++ /dev/null @@ -1,207 +0,0 @@ -/* memregion_direct.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* - * This is an implementation of memory regions that can be used to read/write - * channel memory (in main memory of the host system) from code running in - * a virtual partition. - */ -#include "timskmod.h" -#include "memregion.h" - -#define MYDRVNAME "memregion" - -struct memregion { - HOSTADDRESS physaddr; - ulong nbytes; - void __iomem *mapped; - BOOL requested; - BOOL overlapped; -}; - -static BOOL mapit(struct memregion *memregion); -static void unmapit(struct memregion *memregion); - -struct memregion * -visor_memregion_create(HOSTADDRESS physaddr, ulong nbytes) -{ - struct memregion *rc = NULL; - struct memregion *memregion; - - memregion = kzalloc(sizeof(*memregion), GFP_KERNEL | __GFP_NORETRY); - if (memregion == NULL) - return NULL; - - memregion->physaddr = physaddr; - memregion->nbytes = nbytes; - memregion->overlapped = FALSE; - if (!mapit(memregion)) { - rc = NULL; - goto cleanup; - } - rc = memregion; -cleanup: - if (rc == NULL) { - visor_memregion_destroy(memregion); - memregion = NULL; - } - return rc; -} -EXPORT_SYMBOL_GPL(visor_memregion_create); - -struct memregion * -visor_memregion_create_overlapped(struct memregion *parent, ulong offset, - ulong nbytes) -{ - struct memregion *memregion = NULL; - - if (parent == NULL) - return NULL; - - if (parent->mapped == NULL) - return NULL; - - if ((offset >= parent->nbytes) || - ((offset + nbytes) >= parent->nbytes)) - return NULL; - - memregion = kzalloc(sizeof(*memregion), GFP_KERNEL|__GFP_NORETRY); - if (memregion == NULL) - return NULL; - - memregion->physaddr = parent->physaddr + offset; - memregion->nbytes = nbytes; - memregion->mapped = ((u8 __iomem *)(parent->mapped)) + offset; - memregion->requested = FALSE; - memregion->overlapped = TRUE; - return memregion; -} -EXPORT_SYMBOL_GPL(visor_memregion_create_overlapped); - -static BOOL -mapit(struct memregion *memregion) -{ - ulong physaddr = (ulong)(memregion->physaddr); - ulong nbytes = memregion->nbytes; - - memregion->requested = FALSE; - if (request_mem_region(physaddr, nbytes, MYDRVNAME)) - memregion->requested = TRUE; - memregion->mapped = ioremap_cache(physaddr, nbytes); - if (!memregion->mapped) - return FALSE; - return TRUE; -} - -static void -unmapit(struct memregion *memregion) -{ - if (memregion->mapped != NULL) { - iounmap(memregion->mapped); - memregion->mapped = NULL; - } - if (memregion->requested) { - release_mem_region((ulong)(memregion->physaddr), - memregion->nbytes); - memregion->requested = FALSE; - } -} - -HOSTADDRESS -visor_memregion_get_physaddr(struct memregion *memregion) -{ - return memregion->physaddr; -} -EXPORT_SYMBOL_GPL(visor_memregion_get_physaddr); - -ulong -visor_memregion_get_nbytes(struct memregion *memregion) -{ - return memregion->nbytes; -} -EXPORT_SYMBOL_GPL(visor_memregion_get_nbytes); - -void __iomem * -visor_memregion_get_pointer(struct memregion *memregion) -{ - return memregion->mapped; -} -EXPORT_SYMBOL_GPL(visor_memregion_get_pointer); - -int -visor_memregion_resize(struct memregion *memregion, ulong newsize) -{ - if (newsize == memregion->nbytes) - return 0; - if (memregion->overlapped) - /* no error check here - we no longer know the - * parent's range! - */ - memregion->nbytes = newsize; - else { - unmapit(memregion); - memregion->nbytes = newsize; - if (!mapit(memregion)) - return -1; - } - return 0; -} -EXPORT_SYMBOL_GPL(visor_memregion_resize); - -static int -memregion_readwrite(BOOL is_write, - struct memregion *memregion, ulong offset, - void *local, ulong nbytes) -{ - if (offset + nbytes > memregion->nbytes) - return -EIO; - - if (is_write) - memcpy_toio(memregion->mapped + offset, local, nbytes); - else - memcpy_fromio(local, memregion->mapped + offset, nbytes); - - return 0; -} - -int -visor_memregion_read(struct memregion *memregion, ulong offset, void *dest, - ulong nbytes) -{ - return memregion_readwrite(FALSE, memregion, offset, dest, nbytes); -} -EXPORT_SYMBOL_GPL(visor_memregion_read); - -int -visor_memregion_write(struct memregion *memregion, ulong offset, void *src, - ulong nbytes) -{ - return memregion_readwrite(TRUE, memregion, offset, src, nbytes); -} -EXPORT_SYMBOL_GPL(visor_memregion_write); - -void -visor_memregion_destroy(struct memregion *memregion) -{ - if (memregion == NULL) - return; - if (!memregion->overlapped) - unmapit(memregion); - kfree(memregion); -} -EXPORT_SYMBOL_GPL(visor_memregion_destroy); - diff --git a/drivers/staging/unisys/visorutil/visorkmodutils.c b/drivers/staging/unisys/visorutil/visorkmodutils.c deleted file mode 100644 index 62f0f7046..000000000 --- a/drivers/staging/unisys/visorutil/visorkmodutils.c +++ /dev/null @@ -1,71 +0,0 @@ -/* timskmodutils.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#include "timskmod.h" - -#define MYDRVNAME "timskmodutils" - -/* s-Par uses the Intel processor's VT-X features to separate groups of - * processors into partitions. The firmware sets the hypervisor bit and - * reports an ID in the HV capabilities leaf so that the partition's OS - * knows s-Par is present and managing the processors. - */ - -#define UNISYS_SPAR_LEAF_ID 0x40000000 - -/* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ -#define UNISYS_SPAR_ID_EBX 0x73696e55 -#define UNISYS_SPAR_ID_ECX 0x70537379 -#define UNISYS_SPAR_ID_EDX 0x34367261 - -int unisys_spar_platform; -EXPORT_SYMBOL_GPL(unisys_spar_platform); - -static __init uint32_t visorutil_spar_detect(void) -{ - unsigned int eax, ebx, ecx, edx; - - if (cpu_has_hypervisor) { - /* check the ID */ - cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); - return (ebx == UNISYS_SPAR_ID_EBX) && - (ecx == UNISYS_SPAR_ID_ECX) && - (edx == UNISYS_SPAR_ID_EDX); - } else { - return 0; - } -} - -static __init int visorutil_mod_init(void) -{ - if (visorutil_spar_detect()) { - unisys_spar_platform = TRUE; - return 0; - } else { - return -ENODEV; - } -} - -static __exit void -visorutil_mod_exit(void) -{ -} - -module_init(visorutil_mod_init); -module_exit(visorutil_mod_exit); - -MODULE_LICENSE("GPL"); |