diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
---|---|---|
committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/staging/unisys/visorchipset/visorchipset_main.c |
Initial import
Diffstat (limited to 'drivers/staging/unisys/visorchipset/visorchipset_main.c')
-rw-r--r-- | drivers/staging/unisys/visorchipset/visorchipset_main.c | 2335 |
1 files changed, 2335 insertions, 0 deletions
diff --git a/drivers/staging/unisys/visorchipset/visorchipset_main.c b/drivers/staging/unisys/visorchipset/visorchipset_main.c new file mode 100644 index 000000000..f2663d2c7 --- /dev/null +++ b/drivers/staging/unisys/visorchipset/visorchipset_main.c @@ -0,0 +1,2335 @@ +/* visorchipset_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. + */ + +#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/nls.h> +#include <linux/netdevice.h> +#include <linux/platform_device.h> +#include <linux/uuid.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 +#define MAXOUTSTANDINGCHANNELCOMMAND 256 +#define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 +#define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 + +/* 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 + * controlvm message */ +static inline char * +NONULLSTR(char *s) +{ + if (s) + return s; + return ""; +} + +static int serverregistered; +static int clientregistered; + +#define MAX_CHIPSET_EVENTS 2 +static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 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 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 { + 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; + +/* 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 + * this scenario, we simply stash the controlvm message, then attempt to + * 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"; + +/* This identifies a data buffer that has been received via a controlvm messages + * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation. + */ +struct putfile_buffer_entry { + struct list_head next; /* putfile_buffer_entry list */ + struct parser_context *parser_ctx; /* points to input data buffer */ +}; + +/* List of struct putfile_request *, via next_putfile_request member. + * Each entry in this list identifies an outstanding TRANSMIT_FILE + * conversation. + */ +static LIST_HEAD(putfile_request_list); + +/* This describes a buffer and its current state of transfer (e.g., how many + * bytes have already been supplied as putfile data, and how many bytes are + * remaining) for a putfile_request. + */ +struct putfile_active_buffer { + /* a payload from a controlvm message, containing a file data buffer */ + struct parser_context *parser_ctx; + /* points within data area of parser_ctx to next byte of data */ + u8 *pnext; + /* # bytes left from <pnext> to the end of this data buffer */ + size_t bytes_remaining; +}; + +#define PUTFILE_REQUEST_SIG 0x0906101302281211 +/* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE + * conversation. Structs of this type are dynamically linked into + * <Putfile_request_list>. + */ +struct putfile_request { + u64 sig; /* PUTFILE_REQUEST_SIG */ + + /* header from original TransmitFile request */ + struct controlvm_message_header controlvm_header; + u64 file_request_number; /* from original TransmitFile request */ + + /* link to next struct putfile_request */ + struct list_head next_putfile_request; + + /* most-recent sequence number supplied via a controlvm message */ + u64 data_sequence_number; + + /* head of putfile_buffer_entry list, which describes the data to be + * supplied as putfile data; + * - this list is added to when controlvm messages come in that supply + * file data + * - this list is removed from via the hotplug program that is actually + * consuming these buffers to write as file data */ + struct list_head input_buffer_list; + spinlock_t req_list_lock; /* lock for input_buffer_list */ + + /* waiters for input_buffer_list to go non-empty */ + wait_queue_head_t input_buffer_wq; + + /* data not yet read within current putfile_buffer_entry */ + struct putfile_active_buffer active_buf; + + /* <0 = failed, 0 = in-progress, >0 = successful; */ + /* note that this must be set with req_list_lock, and if you set <0, */ + /* it is your responsibility to also free up all of the other objects */ + /* in this struct (like input_buffer_list, active_buf.parser_ctx) */ + /* before releasing the lock */ + int completion_status; +}; + +static atomic_t visorchipset_cache_buffers_in_use = ATOMIC_INIT(0); + +struct parahotplug_request { + struct list_head list; + int id; + unsigned long expiration; + struct controlvm_message msg; +}; + +static LIST_HEAD(parahotplug_request_list); +static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ +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 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 struct visorchipset_busdev_responders busdev_responders = { + .bus_create = bus_create_response, + .bus_destroy = bus_destroy_response, + .device_create = device_create_response, + .device_destroy = device_destroy_response, + .device_pause = visorchipset_device_pause_response, + .device_resume = device_resume_response, +}; + +/* info for /dev/visorchipset */ +static dev_t major_dev = -1; /**< indicates major num for device */ + +/* prototypes for attributes */ +static ssize_t toolaction_show(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t toolaction_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); +static DEVICE_ATTR_RW(toolaction); + +static ssize_t boottotool_show(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t boottotool_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count); +static DEVICE_ATTR_RW(boottotool); + +static ssize_t error_show(struct device *dev, struct device_attribute *attr, + char *buf); +static ssize_t error_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count); +static DEVICE_ATTR_RW(error); + +static ssize_t textid_show(struct device *dev, struct device_attribute *attr, + char *buf); +static ssize_t textid_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count); +static DEVICE_ATTR_RW(textid); + +static ssize_t remaining_steps_show(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t remaining_steps_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); +static DEVICE_ATTR_RW(remaining_steps); + +static ssize_t chipsetready_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); +static DEVICE_ATTR_WO(chipsetready); + +static ssize_t devicedisabled_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); +static DEVICE_ATTR_WO(devicedisabled); + +static ssize_t deviceenabled_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); +static DEVICE_ATTR_WO(deviceenabled); + +static struct attribute *visorchipset_install_attrs[] = { + &dev_attr_toolaction.attr, + &dev_attr_boottotool.attr, + &dev_attr_error.attr, + &dev_attr_textid.attr, + &dev_attr_remaining_steps.attr, + NULL +}; + +static struct attribute_group visorchipset_install_group = { + .name = "install", + .attrs = visorchipset_install_attrs +}; + +static struct attribute *visorchipset_guest_attrs[] = { + &dev_attr_chipsetready.attr, + NULL +}; + +static struct attribute_group visorchipset_guest_group = { + .name = "guest", + .attrs = visorchipset_guest_attrs +}; + +static struct attribute *visorchipset_parahotplug_attrs[] = { + &dev_attr_devicedisabled.attr, + &dev_attr_deviceenabled.attr, + NULL +}; + +static struct attribute_group visorchipset_parahotplug_group = { + .name = "parahotplug", + .attrs = visorchipset_parahotplug_attrs +}; + +static const struct attribute_group *visorchipset_dev_groups[] = { + &visorchipset_install_group, + &visorchipset_guest_group, + &visorchipset_parahotplug_group, + NULL +}; + +/* /sys/devices/platform/visorchipset */ +static struct platform_device visorchipset_platform_device = { + .name = "visorchipset", + .id = -1, + .dev.groups = visorchipset_dev_groups, +}; + +/* Function prototypes */ +static void controlvm_respond(struct controlvm_message_header *msg_hdr, + int response); +static void controlvm_respond_chipset_init( + struct controlvm_message_header *msg_hdr, int response, + enum ultra_chipset_feature features); +static void controlvm_respond_physdev_changestate( + struct controlvm_message_header *msg_hdr, int response, + struct spar_segment_state state); + +static ssize_t toolaction_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 tool_action; + + visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + tool_action), &tool_action, sizeof(u8)); + return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); +} + +static ssize_t toolaction_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + u8 tool_action; + int ret; + + if (kstrtou8(buf, 10, &tool_action) != 0) + return -EINVAL; + + ret = visorchannel_write(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + tool_action), + &tool_action, sizeof(u8)); + + if (ret) + return ret; + return count; +} + +static ssize_t boottotool_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct efi_spar_indication efi_spar_indication; + + visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + efi_spar_ind), &efi_spar_indication, + sizeof(struct efi_spar_indication)); + return scnprintf(buf, PAGE_SIZE, "%u\n", + efi_spar_indication.boot_to_tool); +} + +static ssize_t boottotool_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int val, ret; + struct efi_spar_indication efi_spar_indication; + + if (kstrtoint(buf, 10, &val) != 0) + return -EINVAL; + + efi_spar_indication.boot_to_tool = val; + ret = visorchannel_write(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + efi_spar_ind), &(efi_spar_indication), + sizeof(struct efi_spar_indication)); + + if (ret) + return ret; + return count; +} + +static ssize_t error_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + u32 error; + + visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + installation_error), + &error, sizeof(u32)); + return scnprintf(buf, PAGE_SIZE, "%i\n", error); +} + +static ssize_t error_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + u32 error; + int ret; + + if (kstrtou32(buf, 10, &error) != 0) + return -EINVAL; + + ret = visorchannel_write(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + installation_error), + &error, sizeof(u32)); + if (ret) + return ret; + return count; +} + +static ssize_t textid_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + u32 text_id; + + visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + installation_text_id), + &text_id, sizeof(u32)); + return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); +} + +static ssize_t textid_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + u32 text_id; + int ret; + + if (kstrtou32(buf, 10, &text_id) != 0) + return -EINVAL; + + ret = visorchannel_write(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + installation_text_id), + &text_id, sizeof(u32)); + if (ret) + return ret; + return count; +} + +static ssize_t remaining_steps_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + u16 remaining_steps; + + visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + installation_remaining_steps), + &remaining_steps, sizeof(u16)); + return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); +} + +static ssize_t remaining_steps_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + u16 remaining_steps; + int ret; + + if (kstrtou16(buf, 10, &remaining_steps) != 0) + return -EINVAL; + + ret = visorchannel_write(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + installation_remaining_steps), + &remaining_steps, sizeof(u16)); + if (ret) + return ret; + return count; +} + +static void +bus_info_clear(void *v) +{ + struct visorchipset_bus_info *p = (struct visorchipset_bus_info *) (v); + + kfree(p->name); + p->name = NULL; + + kfree(p->description); + p->description = NULL; + + p->state.created = 0; + memset(p, 0, sizeof(struct visorchipset_bus_info)); +} + +static void +dev_info_clear(void *v) +{ + struct visorchipset_device_info *p = + (struct visorchipset_device_info *)(v); + + p->state.created = 0; + memset(p, 0, sizeof(struct visorchipset_device_info)); +} + +static u8 +check_chipset_events(void) +{ + int i; + u8 send_msg = 1; + /* Check events to determine if response should be sent */ + for (i = 0; i < MAX_CHIPSET_EVENTS; i++) + send_msg &= chipset_events[i]; + return send_msg; +} + +static void +clear_chipset_events(void) +{ + int i; + /* Clear chipset_events */ + for (i = 0; i < MAX_CHIPSET_EVENTS; i++) + chipset_events[i] = 0; +} + +void +visorchipset_register_busdev_server( + 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 */ + } else { + busdev_server_notifiers = *notifiers; + serverregistered = 1; /* set flag */ + } + if (responders) + *responders = busdev_responders; + if (driver_info) + bus_device_info_init(driver_info, "chipset", "visorchipset", + VERSION, NULL); + + 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); + } +} + +static void +chipset_init(struct controlvm_message *inmsg) +{ + static int chipset_inited; + enum ultra_chipset_feature features = 0; + int rc = CONTROLVM_RESP_SUCCESS; + + POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); + if (chipset_inited) { + rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; + goto cleanup; + } + chipset_inited = 1; + POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); + + /* Set features to indicate we support parahotplug (if Command + * also supports it). */ + features = + inmsg->cmd.init_chipset. + features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; + + /* Set the "reply" bit so Command knows this is a + * features-aware driver. */ + 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); +} + +static void +controlvm_init_response(struct controlvm_message *msg, + struct controlvm_message_header *msg_hdr, int response) +{ + memset(msg, 0, sizeof(struct controlvm_message)); + memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); + msg->hdr.payload_bytes = 0; + msg->hdr.payload_vm_offset = 0; + msg->hdr.payload_max_bytes = 0; + if (response < 0) { + msg->hdr.flags.failed = 1; + msg->hdr.completion_status = (u32) (-response); + } +} + +static void +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; + + if (!visorchannel_signalinsert(controlvm_channel, + CONTROLVM_QUEUE_REQUEST, &outmsg)) { + return; + } +} + +static void +controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, + int response, + enum ultra_chipset_feature features) +{ + struct controlvm_message outmsg; + + controlvm_init_response(&outmsg, msg_hdr, response); + outmsg.cmd.init_chipset.features = features; + if (!visorchannel_signalinsert(controlvm_channel, + CONTROLVM_QUEUE_REQUEST, &outmsg)) { + return; + } +} + +static void controlvm_respond_physdev_changestate( + struct controlvm_message_header *msg_hdr, int response, + struct spar_segment_state state) +{ + struct controlvm_message outmsg; + + controlvm_init_response(&outmsg, msg_hdr, response); + outmsg.cmd.device_change_state.state = state; + outmsg.cmd.device_change_state.flags.phys_device = 1; + if (!visorchannel_signalinsert(controlvm_channel, + CONTROLVM_QUEUE_REQUEST, &outmsg)) { + return; + } +} + +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); + +static void +bus_responder(enum controlvm_id cmd_id, ulong bus_no, int response) +{ + struct visorchipset_bus_info *p = NULL; + BOOL need_clear = FALSE; + + p = findbus(&bus_info_list, bus_no); + if (!p) + 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); + } +} + +static void +device_changestate_responder(enum controlvm_id cmd_id, + ulong bus_no, ulong dev_no, int response, + struct spar_segment_state response_state) +{ + struct visorchipset_device_info *p = NULL; + struct controlvm_message outmsg; + + p = finddevice(&dev_info_list, bus_no, dev_no); + if (!p) + return; + if (p->pending_msg_hdr.id == CONTROLVM_INVALID) + return; /* no controlvm response needed */ + if (p->pending_msg_hdr.id != cmd_id) + return; + + 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; + outmsg.cmd.device_change_state.state = response_state; + + 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, + 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) + 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) + dev_info_clear(p); +} + +static void +bus_epilog(u32 bus_no, + u32 cmd, struct controlvm_message_header *msg_hdr, + int response, BOOL need_response) +{ + BOOL notified = FALSE; + + struct visorchipset_bus_info *bus_info = findbus(&bus_info_list, + bus_no); + + if (!bus_info) + return; + + if (need_response) { + memcpy(&bus_info->pending_msg_hdr, msg_hdr, + sizeof(struct controlvm_message_header)); + } else { + bus_info->pending_msg_hdr.id = CONTROLVM_INVALID; + } + + 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; + } + 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; + } + break; + } + } + if (notified) + /* The callback function just called above is responsible + * for calling the appropriate visorchipset_busdev_responders + * function, which will call bus_responder() + */ + ; + else + bus_responder(cmd, bus_no, response); + up(¬ifier_lock); +} + +static void +device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, + struct controlvm_message_header *msg_hdr, int response, + BOOL need_response, BOOL for_visorbus) +{ + struct visorchipset_busdev_notifiers *notifiers = NULL; + BOOL notified = FALSE; + + struct visorchipset_device_info *dev_info = + finddevice(&dev_info_list, bus_no, dev_no); + char *envp[] = { + "SPARSP_DIAGPOOL_PAUSED_STATE = 1", + NULL + }; + + if (!dev_info) + return; + + if (for_visorbus) + notifiers = &busdev_server_notifiers; + else + notifiers = &busdev_client_notifiers; + if (need_response) { + memcpy(&dev_info->pending_msg_hdr, msg_hdr, + sizeof(struct controlvm_message_header)); + } else { + dev_info->pending_msg_hdr.id = CONTROLVM_INVALID; + } + + down(¬ifier_lock); + if (response >= 0) { + switch (cmd) { + case CONTROLVM_DEVICE_CREATE: + if (notifiers->device_create) { + (*notifiers->device_create) (bus_no, dev_no); + notified = TRUE; + } + break; + case CONTROLVM_DEVICE_CHANGESTATE: + /* ServerReady / ServerRunning / SegmentStateRunning */ + if (state.alive == segment_state_running.alive && + state.operating == + segment_state_running.operating) { + if (notifiers->device_resume) { + (*notifiers->device_resume) (bus_no, + dev_no); + notified = TRUE; + } + } + /* ServerNotReady / ServerLost / SegmentStateStandby */ + else if (state.alive == segment_state_standby.alive && + state.operating == + segment_state_standby.operating) { + /* technically this is standby case + * 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); + } + } + break; + case CONTROLVM_DEVICE_DESTROY: + if (notifiers->device_destroy) { + (*notifiers->device_destroy) (bus_no, dev_no); + notified = TRUE; + } + break; + } + } + if (notified) + /* The callback function just called above is responsible + * for calling the appropriate visorchipset_busdev_responders + * function, which will call device_responder() + */ + ; + else + device_responder(cmd, bus_no, dev_no, response); + up(¬ifier_lock); +} + +static void +bus_create(struct controlvm_message *inmsg) +{ + struct controlvm_message_packet *cmd = &inmsg->cmd; + ulong bus_no = cmd->create_bus.bus_no; + int rc = CONTROLVM_RESP_SUCCESS; + struct visorchipset_bus_info *bus_info = NULL; + + bus_info = findbus(&bus_info_list, bus_no); + if (bus_info && (bus_info->state.created == 1)) { + POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; + goto cleanup; + } + bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); + if (!bus_info) { + POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; + goto cleanup; + } + + INIT_LIST_HEAD(&bus_info->entry); + bus_info->bus_no = bus_no; + bus_info->dev_no = cmd->create_bus.dev_count; + + 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; + + list_add(&bus_info->entry, &bus_info_list); + + POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); + +cleanup: + bus_epilog(bus_no, CONTROLVM_BUS_CREATE, &inmsg->hdr, + rc, inmsg->hdr.flags.response_expected == 1); +} + +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; + int rc = CONTROLVM_RESP_SUCCESS; + + bus_info = findbus(&bus_info_list, bus_no); + 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, + rc, inmsg->hdr.flags.response_expected == 1); +} + +static void +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; + 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); + if (!bus_info) { + POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; + } else if (bus_info->state.created == 0) { + 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) { + 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; + 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, + rc, inmsg->hdr.flags.response_expected == 1); +} + +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; + int rc = CONTROLVM_RESP_SUCCESS; + + dev_info = finddevice(&dev_info_list, bus_no, dev_no); + 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_ALREADY_DONE; + goto cleanup; + } + bus_info = findbus(&bus_info_list, bus_no); + if (!bus_info) { + 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) { + POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; + goto cleanup; + } + dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); + if (!dev_info) { + POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; + 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; + 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); + 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, + CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, + inmsg->hdr.flags.response_expected == 1, + FOR_VISORBUS(dev_info->chan_info.channel_type_uuid)); +} + +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; + struct spar_segment_state state = cmd->device_change_state.state; + struct visorchipset_device_info *dev_info = NULL; + int rc = CONTROLVM_RESP_SUCCESS; + + dev_info = finddevice(&dev_info_list, bus_no, dev_no); + if (!dev_info) { + POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; + } else if (dev_info->state.created == 0) { + POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, + POSTCODE_SEVERITY_ERR); + rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; + } + if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) + device_epilog(bus_no, dev_no, state, + CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, + inmsg->hdr.flags.response_expected == 1, + FOR_VISORBUS( + dev_info->chan_info.channel_type_uuid)); +} + +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; + int rc = CONTROLVM_RESP_SUCCESS; + + dev_info = finddevice(&dev_info_list, bus_no, dev_no); + 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, + CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, + inmsg->hdr.flags.response_expected == 1, + FOR_VISORBUS( + dev_info->chan_info.channel_type_uuid)); +} + +/* 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 + * for failure. + */ +static int +initialize_controlvm_payload_info(HOSTADDRESS phys_addr, u64 offset, u32 bytes, + struct controlvm_payload_info *info) +{ + u8 __iomem *payload = NULL; + int rc = CONTROLVM_RESP_SUCCESS; + + if (!info) { + rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; + goto cleanup; + } + memset(info, 0, sizeof(struct controlvm_payload_info)); + if ((offset == 0) || (bytes == 0)) { + rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; + goto cleanup; + } + payload = ioremap_cache(phys_addr + offset, bytes); + if (!payload) { + rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; + goto cleanup; + } + + info->offset = offset; + info->bytes = bytes; + info->ptr = payload; + +cleanup: + if (rc < 0) { + if (payload) { + iounmap(payload); + payload = NULL; + } + } + return rc; +} + +static void +destroy_controlvm_payload_info(struct controlvm_payload_info *info) +{ + if (info->ptr) { + iounmap(info->ptr); + info->ptr = NULL; + } + memset(info, 0, sizeof(struct controlvm_payload_info)); +} + +static void +initialize_controlvm_payload(void) +{ + HOSTADDRESS phys_addr = visorchannel_get_physaddr(controlvm_channel); + u64 payload_offset = 0; + u32 payload_bytes = 0; + + if (visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + request_payload_offset), + &payload_offset, sizeof(payload_offset)) < 0) { + POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + if (visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + request_payload_bytes), + &payload_bytes, sizeof(payload_bytes)) < 0) { + POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + initialize_controlvm_payload_info(phys_addr, + payload_offset, payload_bytes, + &controlvm_payload_info); +} + +/* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. + * Returns CONTROLVM_RESP_xxx code. + */ +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 +visorchipset_chipset_selftest(void) +{ + char env_selftest[20]; + char *envp[] = { env_selftest, NULL }; + + sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); + kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, + 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 +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) +{ + int rc = visorchipset_chipset_ready(); + + if (rc != CONTROLVM_RESP_SUCCESS) + rc = -rc; + if (msg_hdr->flags.response_expected && !visorchipset_holdchipsetready) + controlvm_respond(msg_hdr, rc); + if (msg_hdr->flags.response_expected && visorchipset_holdchipsetready) { + /* Send CHIPSET_READY response when all modules have been loaded + * and disks mounted for the partition + */ + g_chipset_msg_hdr = *msg_hdr; + } +} + +static void +chipset_selftest(struct controlvm_message_header *msg_hdr) +{ + int rc = visorchipset_chipset_selftest(); + + if (rc != CONTROLVM_RESP_SUCCESS) + rc = -rc; + if (msg_hdr->flags.response_expected) + controlvm_respond(msg_hdr, rc); +} + +static void +chipset_notready(struct controlvm_message_header *msg_hdr) +{ + int rc = visorchipset_chipset_notready(); + + if (rc != CONTROLVM_RESP_SUCCESS) + rc = -rc; + if (msg_hdr->flags.response_expected) + controlvm_respond(msg_hdr, rc); +} + +/* This is your "one-stop" shop for grabbing the next message from the + * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. + */ +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; +} + +/* + * The general parahotplug flow works as follows. The visorchipset + * driver receives a DEVICE_CHANGESTATE message from Command + * specifying a physical device to enable or disable. The CONTROLVM + * message handler calls parahotplug_process_message, which then adds + * the message to a global list and kicks off a udev event which + * causes a user level script to enable or disable the specified + * device. The udev script then writes to + * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write + * to get called, at which point the appropriate CONTROLVM message is + * retrieved from the list and responded to. + */ + +#define PARAHOTPLUG_TIMEOUT_MS 2000 + +/* + * Generate unique int to match an outstanding CONTROLVM message with a + * udev script /proc response + */ +static int +parahotplug_next_id(void) +{ + static atomic_t id = ATOMIC_INIT(0); + + return atomic_inc_return(&id); +} + +/* + * Returns the time (in jiffies) when a CONTROLVM message on the list + * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future + */ +static unsigned long +parahotplug_next_expiration(void) +{ + return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); +} + +/* + * Create a parahotplug_request, which is basically a wrapper for a + * CONTROLVM_MESSAGE that we can stick on a list + */ +static struct parahotplug_request * +parahotplug_request_create(struct controlvm_message *msg) +{ + struct parahotplug_request *req; + + req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); + if (!req) + return NULL; + + req->id = parahotplug_next_id(); + req->expiration = parahotplug_next_expiration(); + req->msg = *msg; + + return req; +} + +/* + * Free a parahotplug_request. + */ +static void +parahotplug_request_destroy(struct parahotplug_request *req) +{ + kfree(req); +} + +/* + * Cause uevent to run the user level script to do the disable/enable + * specified in (the CONTROLVM message in) the specified + * parahotplug_request + */ +static void +parahotplug_request_kickoff(struct parahotplug_request *req) +{ + struct controlvm_message_packet *cmd = &req->msg.cmd; + char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], + env_func[40]; + char *envp[] = { + env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL + }; + + sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); + sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); + sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", + cmd->device_change_state.state.active); + sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", + cmd->device_change_state.bus_no); + sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", + cmd->device_change_state.dev_no >> 3); + sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", + cmd->device_change_state.dev_no & 0x7); + + kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, + envp); +} + +/* + * Remove any request from the list that's been on there too long and + * respond with an error. + */ +static void +parahotplug_process_list(void) +{ + struct list_head *pos = NULL; + struct list_head *tmp = NULL; + + spin_lock(¶hotplug_request_list_lock); + + list_for_each_safe(pos, tmp, ¶hotplug_request_list) { + struct parahotplug_request *req = + list_entry(pos, struct parahotplug_request, list); + + if (!time_after_eq(jiffies, req->expiration)) + continue; + + list_del(pos); + if (req->msg.hdr.flags.response_expected) + controlvm_respond_physdev_changestate( + &req->msg.hdr, + CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, + req->msg.cmd.device_change_state.state); + parahotplug_request_destroy(req); + } + + spin_unlock(¶hotplug_request_list_lock); +} + +/* + * Called from the /proc handler, which means the user script has + * finished the enable/disable. Find the matching identifier, and + * respond to the CONTROLVM message with success. + */ +static int +parahotplug_request_complete(int id, u16 active) +{ + struct list_head *pos = NULL; + struct list_head *tmp = NULL; + + spin_lock(¶hotplug_request_list_lock); + + /* Look for a request matching "id". */ + list_for_each_safe(pos, tmp, ¶hotplug_request_list) { + struct parahotplug_request *req = + list_entry(pos, struct parahotplug_request, list); + if (req->id == id) { + /* Found a match. Remove it from the list and + * respond. + */ + list_del(pos); + spin_unlock(¶hotplug_request_list_lock); + req->msg.cmd.device_change_state.state.active = active; + if (req->msg.hdr.flags.response_expected) + controlvm_respond_physdev_changestate( + &req->msg.hdr, CONTROLVM_RESP_SUCCESS, + req->msg.cmd.device_change_state.state); + parahotplug_request_destroy(req); + return 0; + } + } + + spin_unlock(¶hotplug_request_list_lock); + return -1; +} + +/* + * Enables or disables a PCI device by kicking off a udev script + */ +static void +parahotplug_process_message(struct controlvm_message *inmsg) +{ + struct parahotplug_request *req; + + req = parahotplug_request_create(inmsg); + + if (!req) + return; + + if (inmsg->cmd.device_change_state.state.active) { + /* For enable messages, just respond with success + * right away. This is a bit of a hack, but there are + * issues with the early enable messages we get (with + * either the udev script not detecting that the device + * is up, or not getting called at all). Fortunately + * the messages that get lost don't matter anyway, as + * devices are automatically enabled at + * initialization. + */ + parahotplug_request_kickoff(req); + controlvm_respond_physdev_changestate(&inmsg->hdr, + CONTROLVM_RESP_SUCCESS, + inmsg->cmd.device_change_state.state); + parahotplug_request_destroy(req); + } else { + /* For disable messages, add the request to the + * request list before kicking off the udev script. It + * won't get responded to until the script has + * indicated it's done. + */ + spin_lock(¶hotplug_request_list_lock); + list_add_tail(&req->list, ¶hotplug_request_list); + spin_unlock(¶hotplug_request_list_lock); + + parahotplug_request_kickoff(req); + } +} + +/* Process a controlvm message. + * Return result: + * 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, + * either successfully or with an error. + */ +static BOOL +handle_command(struct controlvm_message inmsg, HOSTADDRESS channel_addr) +{ + struct controlvm_message_packet *cmd = &inmsg.cmd; + u64 parm_addr = 0; + u32 parm_bytes = 0; + struct parser_context *parser_ctx = NULL; + bool local_addr = false; + struct controlvm_message ackmsg; + + /* create parsing context if necessary */ + local_addr = (inmsg.hdr.flags.test_message == 1); + if (channel_addr == 0) + return TRUE; + parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; + parm_bytes = inmsg.hdr.payload_bytes; + + /* Parameter and channel addresses within test messages actually lie + * 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; + + parser_ctx = + parser_init_byte_stream(parm_addr, parm_bytes, + local_addr, &retry); + if (!parser_ctx && retry) + return FALSE; + } + + if (!local_addr) { + controlvm_init_response(&ackmsg, &inmsg.hdr, + CONTROLVM_RESP_SUCCESS); + if (controlvm_channel) + visorchannel_signalinsert(controlvm_channel, + CONTROLVM_QUEUE_ACK, + &ackmsg); + } + switch (inmsg.hdr.id) { + case CONTROLVM_CHIPSET_INIT: + chipset_init(&inmsg); + break; + case CONTROLVM_BUS_CREATE: + bus_create(&inmsg); + break; + case CONTROLVM_BUS_DESTROY: + bus_destroy(&inmsg); + break; + case CONTROLVM_BUS_CONFIGURE: + bus_configure(&inmsg, parser_ctx); + break; + case CONTROLVM_DEVICE_CREATE: + my_device_create(&inmsg); + break; + case CONTROLVM_DEVICE_CHANGESTATE: + if (cmd->device_change_state.flags.phys_device) { + parahotplug_process_message(&inmsg); + } else { + /* 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; + } + break; + case CONTROLVM_DEVICE_DESTROY: + my_device_destroy(&inmsg); + break; + case CONTROLVM_DEVICE_CONFIGURE: + /* no op for now, just send a respond that we passed */ + if (inmsg.hdr.flags.response_expected) + controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); + break; + case CONTROLVM_CHIPSET_READY: + chipset_ready(&inmsg.hdr); + break; + case CONTROLVM_CHIPSET_SELFTEST: + chipset_selftest(&inmsg.hdr); + break; + case CONTROLVM_CHIPSET_STOP: + chipset_notready(&inmsg.hdr); + break; + default: + if (inmsg.hdr.flags.response_expected) + controlvm_respond(&inmsg.hdr, + -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); + break; + } + + if (parser_ctx) { + parser_done(parser_ctx); + parser_ctx = NULL; + } + return TRUE; +} + +static HOSTADDRESS controlvm_get_channel_address(void) +{ + u64 addr = 0; + u32 size = 0; + + if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) + return 0; + + return addr; +} + +static void +controlvm_periodic_work(struct work_struct *work) +{ + struct controlvm_message inmsg; + 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) + goto cleanup; + + poll_count++; + if (poll_count >= 250) + ; /* keep going */ + else + goto cleanup; + + /* Check events to determine if response to CHIPSET_READY + * should be sent + */ + if (visorchipset_holdchipsetready && + (g_chipset_msg_hdr.id != CONTROLVM_INVALID)) { + if (check_chipset_events() == 1) { + controlvm_respond(&g_chipset_msg_hdr, 0); + clear_chipset_events(); + memset(&g_chipset_msg_hdr, 0, + sizeof(struct controlvm_message_header)); + } + } + + while (visorchannel_signalremove(controlvm_channel, + CONTROLVM_QUEUE_RESPONSE, + &inmsg)) + ; + if (!got_command) { + if (controlvm_pending_msg_valid) { + /* we throttled processing of a prior + * msg, so try to process it again + * rather than reading a new one + */ + inmsg = controlvm_pending_msg; + controlvm_pending_msg_valid = FALSE; + got_command = true; + } else { + got_command = read_controlvm_event(&inmsg); + } + } + + handle_command_failed = FALSE; + while (got_command && (!handle_command_failed)) { + most_recent_message_jiffies = jiffies; + if (handle_command(inmsg, + visorchannel_get_physaddr + (controlvm_channel))) + got_command = read_controlvm_event(&inmsg); + else { + /* this is a scenario where throttling + * is required, but probably NOT an + * error...; we stash the current + * controlvm msg so we will attempt to + * reprocess it on our next loop + */ + handle_command_failed = TRUE; + controlvm_pending_msg = inmsg; + controlvm_pending_msg_valid = TRUE; + } + } + + /* parahotplug_worker */ + parahotplug_process_list(); + +cleanup: + + if (time_after(jiffies, + most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { + /* it's been longer than MIN_IDLE_SECONDS since we + * processed our last controlvm message; slow down the + * polling + */ + if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) + poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; + } else { + if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) + poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; + } + + queue_delayed_work(periodic_controlvm_workqueue, + &periodic_controlvm_work, poll_jiffies); +} + +static void +setup_crash_devices_work_queue(struct work_struct *work) +{ + struct controlvm_message local_crash_bus_msg; + struct controlvm_message local_crash_dev_msg; + struct controlvm_message msg; + 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) + goto cleanup; + + POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); + + /* send init chipset msg */ + msg.hdr.id = CONTROLVM_CHIPSET_INIT; + msg.cmd.init_chipset.bus_count = 23; + msg.cmd.init_chipset.switch_count = 0; + + chipset_init(&msg); + + /* get saved message count */ + if (visorchannel_read(controlvm_channel, + offsetof(struct spar_controlvm_channel_protocol, + saved_crash_message_count), + &local_crash_msg_count, sizeof(u16)) < 0) { + POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + + if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { + POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, + local_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), + &local_crash_msg_offset, sizeof(u32)) < 0) { + POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + + /* read create device message for storage bus offset */ + if (visorchannel_read(controlvm_channel, + local_crash_msg_offset, + &local_crash_bus_msg, + sizeof(struct controlvm_message)) < 0) { + POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + + /* read create device message for storage device */ + if (visorchannel_read(controlvm_channel, + local_crash_msg_offset + + sizeof(struct controlvm_message), + &local_crash_dev_msg, + sizeof(struct controlvm_message)) < 0) { + POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + + /* reuse IOVM create bus message */ + if (local_crash_bus_msg.cmd.create_bus.channel_addr != 0) { + bus_create(&local_crash_bus_msg); + } else { + POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + + /* reuse create device message for storage device */ + if (local_crash_dev_msg.cmd.create_device.channel_addr != 0) { + my_device_create(&local_crash_dev_msg); + } else { + POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, + POSTCODE_SEVERITY_ERR); + return; + } + POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); + return; + +cleanup: + + poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; + + queue_delayed_work(periodic_controlvm_workqueue, + &periodic_controlvm_work, poll_jiffies); +} + +static void +bus_create_response(ulong bus_no, int response) +{ + bus_responder(CONTROLVM_BUS_CREATE, bus_no, response); +} + +static void +bus_destroy_response(ulong bus_no, int response) +{ + bus_responder(CONTROLVM_BUS_DESTROY, bus_no, response); +} + +static void +device_create_response(ulong bus_no, ulong dev_no, int response) +{ + device_responder(CONTROLVM_DEVICE_CREATE, bus_no, dev_no, response); +} + +static void +device_destroy_response(ulong bus_no, ulong dev_no, int response) +{ + device_responder(CONTROLVM_DEVICE_DESTROY, bus_no, dev_no, 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); +} +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) +{ + 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); + +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); + + if (!p) + return FALSE; + memcpy(dev_info, p, sizeof(struct visorchipset_device_info)); + return TRUE; +} +EXPORT_SYMBOL_GPL(visorchipset_get_device_info); + +BOOL +visorchipset_set_device_context(ulong bus_no, ulong dev_no, void *context) +{ + struct visorchipset_device_info *p = + finddevice(&dev_info_list, bus_no, dev_no); + + if (!p) + return FALSE; + p->bus_driver_context = context; + return TRUE; +} +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) +{ + 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; + + atomic_inc(&visorchipset_cache_buffers_in_use); + return p; +} + +/* 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) +{ + if (!p) + return; + + atomic_dec(&visorchipset_cache_buffers_in_use); + kmem_cache_free(pool, p); +} + +static ssize_t chipsetready_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + char msgtype[64]; + + if (sscanf(buf, "%63s", msgtype) != 1) + return -EINVAL; + + if (strcmp(msgtype, "CALLHOMEDISK_MOUNTED") == 0) { + chipset_events[0] = 1; + return count; + } else if (strcmp(msgtype, "MODULES_LOADED") == 0) { + chipset_events[1] = 1; + return count; + } + return -EINVAL; +} + +/* The parahotplug/devicedisabled interface gets called by our support script + * when an SR-IOV device has been shut down. The ID is passed to the script + * and then passed back when the device has been removed. + */ +static ssize_t devicedisabled_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + uint id; + + if (kstrtouint(buf, 10, &id) != 0) + return -EINVAL; + + parahotplug_request_complete(id, 0); + return count; +} + +/* The parahotplug/deviceenabled interface gets called by our support script + * when an SR-IOV device has been recovered. The ID is passed to the script + * and then passed back when the device has been brought back up. + */ +static ssize_t deviceenabled_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + uint id; + + if (kstrtouint(buf, 10, &id) != 0) + return -EINVAL; + + parahotplug_request_complete(id, 1); + return count; +} + +static int __init +visorchipset_init(void) +{ + int rc = 0, x = 0; + HOSTADDRESS addr; + + if (!unisys_spar_platform) + return -ENODEV; + + 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); + + if (visorchipset_testvnic) { + POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, x, DIAG_SEVERITY_ERR); + rc = x; + goto cleanup; + } + + 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; + } + } else { + return -ENODEV; + } + + major_dev = MKDEV(visorchipset_major, 0); + rc = visorchipset_file_init(major_dev, &controlvm_channel); + if (rc < 0) { + POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); + 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; + 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; + } + } + + visorchipset_platform_device.dev.devt = major_dev; + if (platform_device_register(&visorchipset_platform_device) < 0) { + POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); + rc = -1; + goto cleanup; + } + POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); + rc = 0; +cleanup: + if (rc) { + POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, + POSTCODE_SEVERITY_ERR); + } + return rc; +} + +static void +visorchipset_exit(void) +{ + POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); + + 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; + } + + cleanup_controlvm_structures(); + + 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)); + + visorchannel_destroy(controlvm_channel); + + visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); + POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); +} + +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; + +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; + +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; + +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; + +module_param_named(serverregwait, visorchipset_serverregwait, int, S_IRUGO); +MODULE_PARM_DESC(visorchipset_serverreqwait, + "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_AUTHOR("Unisys"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " + VERSION); +MODULE_VERSION(VERSION); |