diff options
Diffstat (limited to 'drivers/staging/unisys/common-spar/include/channels/channel.h')
| -rw-r--r-- | drivers/staging/unisys/common-spar/include/channels/channel.h | 590 |
1 files changed, 0 insertions, 590 deletions
diff --git a/drivers/staging/unisys/common-spar/include/channels/channel.h b/drivers/staging/unisys/common-spar/include/channels/channel.h deleted file mode 100644 index 6fb6e5b3d..000000000 --- a/drivers/staging/unisys/common-spar/include/channels/channel.h +++ /dev/null @@ -1,590 +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. - */ - -#ifndef __CHANNEL_H__ -#define __CHANNEL_H__ - -#include <linux/types.h> -#include <linux/io.h> -#include <linux/uuid.h> - -/* -* Whenever this file is changed a corresponding change must be made in -* the Console/ServicePart/visordiag_early/supervisor_channel.h file -* which is needed for Linux kernel compiles. These two files must be -* in sync. -*/ - -/* define the following to prevent include nesting in kernel header - * files of similar abbreviated content - */ -#define __SUPERVISOR_CHANNEL_H__ - -#define SIGNATURE_16(A, B) ((A) | (B<<8)) -#define SIGNATURE_32(A, B, C, D) \ - (SIGNATURE_16(A, B) | (SIGNATURE_16(C, D) << 16)) -#define SIGNATURE_64(A, B, C, D, E, F, G, H) \ - (SIGNATURE_32(A, B, C, D) | ((u64)(SIGNATURE_32(E, F, G, H)) << 32)) - -#ifndef lengthof -#define lengthof(TYPE, MEMBER) (sizeof(((TYPE *)0)->MEMBER)) -#endif -#ifndef COVERQ -#define COVERQ(v, d) (((v)+(d)-1) / (d)) -#endif -#ifndef COVER -#define COVER(v, d) ((d)*COVERQ(v, d)) -#endif - -#define ULTRA_CHANNEL_PROTOCOL_SIGNATURE SIGNATURE_32('E', 'C', 'N', 'L') - -enum channel_serverstate { - CHANNELSRV_UNINITIALIZED = 0, /* channel is in an undefined state */ - CHANNELSRV_READY = 1 /* channel has been initialized by server */ -}; - -enum channel_clientstate { - CHANNELCLI_DETACHED = 0, - CHANNELCLI_DISABLED = 1, /* client can see channel but is NOT - * allowed to use it unless given TBD - * explicit request (should actually be - * < DETACHED) */ - CHANNELCLI_ATTACHING = 2, /* legacy EFI client request - * for EFI server to attach */ - CHANNELCLI_ATTACHED = 3, /* idle, but client may want - * to use channel any time */ - CHANNELCLI_BUSY = 4, /* client either wants to use or is - * using channel */ - CHANNELCLI_OWNED = 5 /* "no worries" state - client can - * access channel anytime */ -}; - -static inline const u8 * -ULTRA_CHANNELCLI_STRING(u32 v) -{ - switch (v) { - case CHANNELCLI_DETACHED: - return (const u8 *)("DETACHED"); - case CHANNELCLI_DISABLED: - return (const u8 *)("DISABLED"); - case CHANNELCLI_ATTACHING: - return (const u8 *)("ATTACHING"); - case CHANNELCLI_ATTACHED: - return (const u8 *)("ATTACHED"); - case CHANNELCLI_BUSY: - return (const u8 *)("BUSY"); - case CHANNELCLI_OWNED: - return (const u8 *)("OWNED"); - default: - break; - } - return (const u8 *)("?"); -} - -#define SPAR_CHANNEL_SERVER_READY(ch) \ - (readl(&(ch)->srv_state) == CHANNELSRV_READY) - -#define ULTRA_VALID_CHANNELCLI_TRANSITION(o, n) \ - (((((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_DISABLED)) || \ - (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_DISABLED)) || \ - (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_DISABLED)) || \ - (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_DETACHED)) || \ - (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_DETACHED)) || \ - (((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_ATTACHING)) || \ - (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_ATTACHED)) || \ - (((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_ATTACHED)) || \ - (((o) == CHANNELCLI_BUSY) && ((n) == CHANNELCLI_ATTACHED)) || \ - (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_BUSY)) || \ - (((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_OWNED)) || \ - (((o) == CHANNELCLI_DISABLED) && ((n) == CHANNELCLI_OWNED)) || \ - (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_OWNED)) || \ - (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_OWNED)) || \ - (((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 */ -#define ULTRA_CLIERRORBOOT_THROTTLEMSG_DISABLED 0x01 - -/* throttling invalid boot channel statetransition error due to client - * not attached */ -#define ULTRA_CLIERRORBOOT_THROTTLEMSG_NOTATTACHED 0x02 - -/* throttling invalid boot channel statetransition error due to busy channel */ -#define ULTRA_CLIERRORBOOT_THROTTLEMSG_BUSY 0x04 - -/* Values for ULTRA_CHANNEL_PROTOCOL.CliErrorOS: */ -/* throttling invalid guest OS channel statetransition error due to - * client disabled */ -#define ULTRA_CLIERROROS_THROTTLEMSG_DISABLED 0x01 - -/* throttling invalid guest OS channel statetransition error due to - * client not attached */ -#define ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED 0x02 - -/* throttling invalid guest OS channel statetransition error due to - * busy channel */ -#define ULTRA_CLIERROROS_THROTTLEMSG_BUSY 0x04 - -/* Values for ULTRA_CHANNEL_PROTOCOL.Features: This define exists so -* that windows guest can look at the FeatureFlags in the io channel, -* and configure the windows driver to use interrupts or not based on -* this setting. This flag is set in uislib after the -* ULTRA_VHBA_init_channel is called. All feature bits for all -* channels should be defined here. The io channel feature bits are -* defined right here */ -#define ULTRA_IO_DRIVER_ENABLES_INTS (0x1ULL << 1) -#define ULTRA_IO_CHANNEL_IS_POLLING (0x1ULL << 3) -#define ULTRA_IO_IOVM_IS_OK_WITH_DRIVER_DISABLING_INTS (0x1ULL << 4) -#define ULTRA_IO_DRIVER_DISABLES_INTS (0x1ULL << 5) -#define ULTRA_IO_DRIVER_SUPPORTS_ENHANCED_RCVBUF_CHECKING (0x1ULL << 6) - -#pragma pack(push, 1) /* both GCC and VC now allow this pragma */ -/* Common Channel Header */ -struct channel_header { - u64 signature; /* Signature */ - u32 legacy_state; /* DEPRECATED - being replaced by */ - /* / SrvState, CliStateBoot, and CliStateOS below */ - u32 header_size; /* sizeof(struct channel_header) */ - u64 size; /* Total size of this channel in bytes */ - u64 features; /* Flags to modify behavior */ - uuid_le chtype; /* Channel type: data, bus, control, etc. */ - u64 partition_handle; /* ID of guest partition */ - u64 handle; /* Device number of this channel in client */ - u64 ch_space_offset; /* Offset in bytes to channel specific area */ - u32 version_id; /* struct channel_header Version ID */ - u32 partition_index; /* Index of guest partition */ - uuid_le zone_uuid; /* Guid of Channel's zone */ - u32 cli_str_offset; /* offset from channel header to - * nul-terminated ClientString (0 if - * ClientString not present) */ - u32 cli_state_boot; /* CHANNEL_CLIENTSTATE of pre-boot - * EFI client of this channel */ - u32 cmd_state_cli; /* CHANNEL_COMMANDSTATE (overloaded in - * Windows drivers, see ServerStateUp, - * ServerStateDown, etc) */ - u32 cli_state_os; /* CHANNEL_CLIENTSTATE of Guest OS - * client of this channel */ - u32 ch_characteristic; /* CHANNEL_CHARACTERISTIC_<xxx> */ - u32 cmd_state_srv; /* CHANNEL_COMMANDSTATE (overloaded in - * Windows drivers, see ServerStateUp, - * ServerStateDown, etc) */ - u32 srv_state; /* CHANNEL_SERVERSTATE */ - u8 cli_error_boot; /* bits to indicate err states for - * boot clients, so err messages can - * be throttled */ - u8 cli_error_os; /* bits to indicate err states for OS - * clients, so err messages can be - * throttled */ - u8 filler[1]; /* Pad out to 128 byte cacheline */ - /* Please add all new single-byte values below here */ - u8 recover_channel; -}; - -#define ULTRA_CHANNEL_ENABLE_INTS (0x1ULL << 0) - -/* Subheader for the Signal Type variation of the Common Channel */ -struct signal_queue_header { - /* 1st cache line */ - u32 version; /* SIGNAL_QUEUE_HEADER Version ID */ - u32 chtype; /* Queue type: storage, network */ - u64 size; /* Total size of this queue in bytes */ - u64 sig_base_offset; /* Offset to signal queue area */ - u64 features; /* Flags to modify behavior */ - u64 num_sent; /* Total # of signals placed in this queue */ - u64 num_overflows; /* Total # of inserts failed due to - * full queue */ - u32 signal_size; /* Total size of a signal for this queue */ - u32 max_slots; /* Max # of slots in queue, 1 slot is - * always empty */ - u32 max_signals; /* Max # of signals in queue - * (MaxSignalSlots-1) */ - u32 head; /* Queue head signal # */ - /* 2nd cache line */ - u64 num_received; /* Total # of signals removed from this queue */ - u32 tail; /* Queue tail signal # (on separate - * cache line) */ - u32 reserved1; /* Reserved field */ - u64 reserved2; /* Reserved field */ - u64 client_queue; - u64 num_irq_received; /* Total # of Interrupts received. This - * is incremented by the ISR in the - * guest windows driver */ - u64 num_empty; /* Number of times that visor_signal_remove - * is called and returned Empty - * Status. */ - u32 errorflags; /* Error bits set during SignalReinit - * to denote trouble with client's - * fields */ - u8 filler[12]; /* Pad out to 64 byte cacheline */ -}; - -#pragma pack(pop) - -#define spar_signal_init(chan, QHDRFLD, QDATAFLD, QDATATYPE, ver, typ) \ - do { \ - memset(&chan->QHDRFLD, 0, sizeof(chan->QHDRFLD)); \ - chan->QHDRFLD.version = ver; \ - chan->QHDRFLD.chtype = typ; \ - chan->QHDRFLD.size = sizeof(chan->QDATAFLD); \ - chan->QHDRFLD.signal_size = sizeof(QDATATYPE); \ - chan->QHDRFLD.sig_base_offset = (u64)(chan->QDATAFLD)- \ - (u64)(&chan->QHDRFLD); \ - chan->QHDRFLD.max_slots = \ - sizeof(chan->QDATAFLD)/sizeof(QDATATYPE); \ - chan->QHDRFLD.max_signals = chan->QHDRFLD.max_slots-1; \ - } while (0) - -/* Generic function useful for validating any type of channel when it is - * received by the client that will be accessing the channel. - * Note that <logCtx> is only needed for callers in the EFI environment, and - * is used to pass the EFI_DIAG_CAPTURE_PROTOCOL needed to log messages. - */ -static inline int -spar_check_channel_client(void __iomem *ch, - uuid_le expected_uuid, - char *chname, - u64 expected_min_bytes, - u32 expected_version, - u64 expected_signature) -{ - if (uuid_le_cmp(expected_uuid, NULL_UUID_LE) != 0) { - uuid_le guid; - - memcpy_fromio(&guid, - &((struct channel_header __iomem *)(ch))->chtype, - sizeof(guid)); - /* caller wants us to verify type GUID */ - if (uuid_le_cmp(guid, expected_uuid) != 0) { - pr_err("Channel mismatch on channel=%s(%pUL) field=type expected=%pUL actual=%pUL\n", - chname, &expected_uuid, - &expected_uuid, &guid); - return 0; - } - } - if (expected_min_bytes > 0) { /* caller wants us to verify - * channel size */ - unsigned long long bytes = - readq(&((struct channel_header __iomem *) - (ch))->size); - if (bytes < expected_min_bytes) { - pr_err("Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8Lx actual=0x%-8.8Lx\n", - chname, &expected_uuid, - (unsigned long long)expected_min_bytes, bytes); - return 0; - } - } - if (expected_version > 0) { /* caller wants us to verify - * channel version */ - unsigned long ver = readl(&((struct channel_header __iomem *) - (ch))->version_id); - if (ver != expected_version) { - pr_err("Channel mismatch on channel=%s(%pUL) field=version expected=0x%-8.8lx actual=0x%-8.8lx\n", - chname, &expected_uuid, - (unsigned long)expected_version, ver); - return 0; - } - } - if (expected_signature > 0) { /* caller wants us to verify - * channel signature */ - unsigned long long sig = - readq(&((struct channel_header __iomem *) - (ch))->signature); - if (sig != expected_signature) { - pr_err("Channel mismatch on channel=%s(%pUL) field=signature expected=0x%-8.8llx actual=0x%-8.8llx\n", - chname, &expected_uuid, - expected_signature, sig); - return 0; - } - } - return 1; -} - -/* Generic function useful for validating any type of channel when it is about - * to be initialized by the server of the channel. - * Note that <logCtx> is only needed for callers in the EFI environment, and - * is used to pass the EFI_DIAG_CAPTURE_PROTOCOL needed to log messages. - */ -static inline int spar_check_channel_server(uuid_le typeuuid, char *name, - u64 expected_min_bytes, - u64 actual_bytes) -{ - if (expected_min_bytes > 0) /* caller wants us to verify - * channel size */ - if (actual_bytes < expected_min_bytes) { - pr_err("Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8llx actual=0x%-8.8llx\n", - name, &typeuuid, expected_min_bytes, - actual_bytes); - return 0; - } - return 1; -} - -/* Given a file pathname <s> (with '/' or '\' separating directory nodes), - * returns a pointer to the beginning of a node within that pathname such - * that the number of nodes from that pointer to the end of the string is - * NOT more than <n>. Note that if the pathname has less than <n> nodes - * in it, the return pointer will be to the beginning of the string. - */ -static inline u8 * -pathname_last_n_nodes(u8 *s, unsigned int n) -{ - u8 *p = s; - unsigned int node_count = 0; - - while (*p != '\0') { - if ((*p == '/') || (*p == '\\')) - node_count++; - p++; - } - if (node_count <= n) - return s; - while (n > 0) { - p--; - if (p == s) - break; /* should never happen, unless someone - * is changing the string while we are - * looking at it!! */ - if ((*p == '/') || (*p == '\\')) - n--; - } - return p + 1; -} - -static inline int -spar_channel_client_acquire_os(void __iomem *ch, u8 *id) -{ - struct channel_header __iomem *hdr = ch; - - if (readl(&hdr->cli_state_os) == CHANNELCLI_DISABLED) { - if ((readb(&hdr->cli_error_os) - & ULTRA_CLIERROROS_THROTTLEMSG_DISABLED) == 0) { - /* we are NOT throttling this message */ - writeb(readb(&hdr->cli_error_os) | - ULTRA_CLIERROROS_THROTTLEMSG_DISABLED, - &hdr->cli_error_os); - /* throttle until acquire successful */ - - pr_info("%s Channel StateTransition INVALID! - acquire failed because OS client DISABLED\n", - id); - } - return 0; - } - if ((readl(&hdr->cli_state_os) != CHANNELCLI_OWNED) && - (readl(&hdr->cli_state_boot) == CHANNELCLI_DISABLED)) { - /* Our competitor is DISABLED, so we can transition to OWNED */ - pr_info("%s Channel StateTransition (%s) %s(%d)-->%s(%d)\n", - id, "cli_state_os", - ULTRA_CHANNELCLI_STRING(readl(&hdr->cli_state_os)), - readl(&hdr->cli_state_os), - ULTRA_CHANNELCLI_STRING(CHANNELCLI_OWNED), - CHANNELCLI_OWNED); - writel(CHANNELCLI_OWNED, &hdr->cli_state_os); - mb(); /* required for channel synch */ - } - if (readl(&hdr->cli_state_os) == CHANNELCLI_OWNED) { - if (readb(&hdr->cli_error_os) != 0) { - /* we are in an error msg throttling state; - * come out of it */ - pr_info("%s Channel OS client acquire now successful\n", - id); - writeb(0, &hdr->cli_error_os); - } - return 1; - } - - /* We have to do it the "hard way". We transition to BUSY, - * and can use the channel iff our competitor has not also - * transitioned to BUSY. */ - if (readl(&hdr->cli_state_os) != CHANNELCLI_ATTACHED) { - if ((readb(&hdr->cli_error_os) - & ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED) == 0) { - /* we are NOT throttling this message */ - writeb(readb(&hdr->cli_error_os) | - ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED, - &hdr->cli_error_os); - /* throttle until acquire successful */ - pr_info("%s Channel StateTransition INVALID! - acquire failed because OS client NOT ATTACHED (state=%s(%d))\n", - id, ULTRA_CHANNELCLI_STRING( - readl(&hdr->cli_state_os)), - readl(&hdr->cli_state_os)); - } - return 0; - } - writel(CHANNELCLI_BUSY, &hdr->cli_state_os); - mb(); /* required for channel synch */ - if (readl(&hdr->cli_state_boot) == CHANNELCLI_BUSY) { - if ((readb(&hdr->cli_error_os) - & ULTRA_CLIERROROS_THROTTLEMSG_BUSY) == 0) { - /* we are NOT throttling this message */ - writeb(readb(&hdr->cli_error_os) | - ULTRA_CLIERROROS_THROTTLEMSG_BUSY, - &hdr->cli_error_os); - /* throttle until acquire successful */ - pr_info("%s Channel StateTransition failed - host OS acquire failed because boot BUSY\n", - id); - } - /* reset busy */ - writel(CHANNELCLI_ATTACHED, &hdr->cli_state_os); - mb(); /* required for channel synch */ - return 0; - } - if (readb(&hdr->cli_error_os) != 0) { - /* we are in an error msg throttling state; come out of it */ - pr_info("%s Channel OS client acquire now successful\n", id); - writeb(0, &hdr->cli_error_os); - } - return 1; -} - -static inline void -spar_channel_client_release_os(void __iomem *ch, u8 *id) -{ - struct channel_header __iomem *hdr = ch; - - if (readb(&hdr->cli_error_os) != 0) { - /* we are in an error msg throttling state; come out of it */ - pr_info("%s Channel OS client error state cleared\n", id); - writeb(0, &hdr->cli_error_os); - } - if (readl(&hdr->cli_state_os) == CHANNELCLI_OWNED) - return; - if (readl(&hdr->cli_state_os) != CHANNELCLI_BUSY) { - pr_info("%s Channel StateTransition INVALID! - release failed because OS client NOT BUSY (state=%s(%d))\n", - id, ULTRA_CHANNELCLI_STRING( - readl(&hdr->cli_state_os)), - readl(&hdr->cli_state_os)); - /* return; */ - } - writel(CHANNELCLI_ATTACHED, &hdr->cli_state_os); /* release busy */ -} - -/* -* 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); - -/* -* 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); - -/* -* 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); - -/* -* 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); - -#endif |