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staging: visorchannel module 

The visorchannel module is a support library that abstracts reading
and writing a channel in memory.

Signed-off-by: Ken Cox <jkc@redhat.com>
Cc: Ben Romer <sparmaintainer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ken Cox 2014-03-04 07:58:06 -06:00 committed by Greg Kroah-Hartman
parent 9d9baadd40
commit e423812a9e
12 changed files with 2035 additions and 0 deletions
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1
drivers/staging/unisys/Kconfig
View File

@ -10,5 +10,6 @@ menuconfig UNISYSSPAR
if UNISYSSPAR
source "drivers/staging/unisys/visorutil/Kconfig"
source "drivers/staging/unisys/visorchannel/Kconfig"
endif # UNISYSSPAR

1
drivers/staging/unisys/Makefile
View File

@ -2,4 +2,5 @@
# Makefile for Unisys SPAR drivers
#
obj-$(CONFIG_UNISYS_VISORUTIL) += visorutil/
obj-$(CONFIG_UNISYS_VISORCHANNEL) += visorchannel/

645
drivers/staging/unisys/common-spar/include/channels/channel.h Normal file
View File

@ -0,0 +1,645 @@
/* 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.
*/
#ifndef __CHANNEL_H__
#define __CHANNEL_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 abreviated content
*/
#define __SUPERVISOR_CHANNEL_H__
#include "commontypes.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
#ifndef GUID0
#define GUID0 {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0} }
#endif
/* The C language is inconsistent with respect to where it allows literal
* constants, especially literal constant structs. Literal constant structs
* are allowed for initialization only, whereas other types of literal
* constants are allowed anywhere. We get around this inconsistency by
* declaring a "static const" variable for each GUID. This variable can be
* used in expressions where the literal constant would not be allowed.
*/
static const GUID Guid0 = GUID0;
#define ULTRA_CHANNEL_PROTOCOL_SIGNATURE SIGNATURE_32('E', 'C', 'N', 'L')
typedef enum {
CHANNELSRV_UNINITIALIZED = 0, /* channel is in an undefined state */
CHANNELSRV_READY = 1 /* channel has been initialized by server */
} CHANNEL_SERVERSTATE;
typedef enum {
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 */
} CHANNEL_CLIENTSTATE;
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 ULTRA_CHANNELSRV_IS_READY(x) ((x) == CHANNELSRV_READY)
#define ULTRA_CHANNEL_SERVER_READY(pChannel) \
(ULTRA_CHANNELSRV_IS_READY((pChannel)->SrvState))
#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 ULTRA_CHANNEL_CLIENT_CHK_TRANSITION(old, new, chanId, logCtx, \
file, line) \
do { \
if (!ULTRA_VALID_CHANNELCLI_TRANSITION(old, new)) \
UltraLogEvent(logCtx, \
CHANNELSTATE_DIAG_EVENTID_TRANSITERR, \
CHANNELSTATE_DIAG_SEVERITY, \
CHANNELSTATE_DIAG_SUBSYS, \
__func__, __LINE__, \
"%s Channel StateTransition INVALID! (%s) %s(%d)-->%s(%d) @%s:%d\n", \
chanId, "CliState<x>", \
ULTRA_CHANNELCLI_STRING(old), \
old, \
ULTRA_CHANNELCLI_STRING(new), \
new, \
PathName_Last_N_Nodes((U8 *)file, 4), \
line); \
} while (0)
#define ULTRA_CHANNEL_CLIENT_TRANSITION(pChan, chanId, field, \
newstate, logCtx) \
do { \
ULTRA_CHANNEL_CLIENT_CHK_TRANSITION( \
(((CHANNEL_HEADER *)(pChan))->field), newstate, \
chanId, logCtx, __FILE__, __LINE__); \
UltraLogEvent(logCtx, CHANNELSTATE_DIAG_EVENTID_TRANSITOK, \
CHANNELSTATE_DIAG_SEVERITY, \
CHANNELSTATE_DIAG_SUBSYS, \
__func__, __LINE__, \
"%s Channel StateTransition (%s) %s(%d)-->%s(%d) @%s:%d\n", \
chanId, #field, \
ULTRA_CHANNELCLI_STRING(((CHANNEL_HEADER *) \
(pChan))->field), \
((CHANNEL_HEADER *)(pChan))->field, \
ULTRA_CHANNELCLI_STRING(newstate), \
newstate, \
PathName_Last_N_Nodes(__FILE__, 4), __LINE__); \
((CHANNEL_HEADER *)(pChan))->field = newstate; \
MEMORYBARRIER; \
} while (0)
#define ULTRA_CHANNEL_CLIENT_ACQUIRE_OS(pChan, chanId, logCtx) \
ULTRA_channel_client_acquire_os(pChan, chanId, logCtx, \
(char *)__FILE__, __LINE__, \
(char *)__func__)
#define ULTRA_CHANNEL_CLIENT_RELEASE_OS(pChan, chanId, logCtx) \
ULTRA_channel_client_release_os(pChan, chanId, logCtx, \
(char *)__FILE__, __LINE__, (char *)__func__)
/* 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 */
typedef struct _CHANNEL_HEADER {
U64 Signature; /* Signature */
U32 LegacyState; /* DEPRECATED - being replaced by */
/* / SrvState, CliStateBoot, and CliStateOS below */
U32 HeaderSize; /* sizeof(CHANNEL_HEADER) */
U64 Size; /* Total size of this channel in bytes */
U64 Features; /* Flags to modify behavior */
GUID Type; /* Channel type: data, bus, control, etc. */
U64 PartitionHandle; /* ID of guest partition */
U64 Handle; /* Device number of this channel in client */
U64 oChannelSpace; /* Offset in bytes to channel specific area */
U32 VersionId; /* CHANNEL_HEADER Version ID */
U32 PartitionIndex; /* Index of guest partition */
GUID ZoneGuid; /* Guid of Channel's zone */
U32 oClientString; /* offset from channel header to
* nul-terminated ClientString (0 if
* ClientString not present) */
U32 CliStateBoot; /* CHANNEL_CLIENTSTATE of pre-boot
* EFI client of this channel */
U32 CmdStateCli; /* CHANNEL_COMMANDSTATE (overloaded in
* Windows drivers, see ServerStateUp,
* ServerStateDown, etc) */
U32 CliStateOS; /* CHANNEL_CLIENTSTATE of Guest OS
* client of this channel */
U32 ChannelCharacteristics; /* CHANNEL_CHARACTERISTIC_<xxx> */
U32 CmdStateSrv; /* CHANNEL_COMMANDSTATE (overloaded in
* Windows drivers, see ServerStateUp,
* ServerStateDown, etc) */
U32 SrvState; /* CHANNEL_SERVERSTATE */
U8 CliErrorBoot; /* bits to indicate err states for
* boot clients, so err messages can
* be throttled */
U8 CliErrorOS; /* 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 RecoverChannel;
} CHANNEL_HEADER, *pCHANNEL_HEADER, ULTRA_CHANNEL_PROTOCOL;
#define ULTRA_CHANNEL_ENABLE_INTS (0x1ULL << 0)
/* Subheader for the Signal Type variation of the Common Channel */
typedef struct _SIGNAL_QUEUE_HEADER {
/* 1st cache line */
U32 VersionId; /* SIGNAL_QUEUE_HEADER Version ID */
U32 Type; /* Queue type: storage, network */
U64 Size; /* Total size of this queue in bytes */
U64 oSignalBase; /* Offset to signal queue area */
U64 FeatureFlags; /* Flags to modify behavior */
U64 NumSignalsSent; /* Total # of signals placed in this queue */
U64 NumOverflows; /* Total # of inserts failed due to
* full queue */
U32 SignalSize; /* Total size of a signal for this queue */
U32 MaxSignalSlots; /* Max # of slots in queue, 1 slot is
* always empty */
U32 MaxSignals; /* Max # of signals in queue
* (MaxSignalSlots-1) */
U32 Head; /* Queue head signal # */
/* 2nd cache line */
U64 NumSignalsReceived; /* Total # of signals removed from this queue */
U32 Tail; /* Queue tail signal # (on separate
* cache line) */
U32 Reserved1; /* Reserved field */
U64 Reserved2; /* Resrved field */
U64 ClientQueue;
U64 NumInterruptsReceived; /* Total # of Interrupts received. This
* is incremented by the ISR in the
* guest windows driver */
U64 NumEmptyCnt; /* Number of times that SignalRemove
* 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 */
} SIGNAL_QUEUE_HEADER, *pSIGNAL_QUEUE_HEADER;
#pragma pack(pop)
#define SignalInit(chan, QHDRFLD, QDATAFLD, QDATATYPE, ver, typ) \
do { \
MEMSET(&chan->QHDRFLD, 0, sizeof(chan->QHDRFLD)); \
chan->QHDRFLD.VersionId = ver; \
chan->QHDRFLD.Type = typ; \
chan->QHDRFLD.Size = sizeof(chan->QDATAFLD); \
chan->QHDRFLD.SignalSize = sizeof(QDATATYPE); \
chan->QHDRFLD.oSignalBase = (UINTN)(chan->QDATAFLD)- \
(UINTN)(&chan->QHDRFLD); \
chan->QHDRFLD.MaxSignalSlots = \
sizeof(chan->QDATAFLD)/sizeof(QDATATYPE); \
chan->QHDRFLD.MaxSignals = chan->QHDRFLD.MaxSignalSlots-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
ULTRA_check_channel_client(void *pChannel,
GUID expectedTypeGuid,
char *channelName,
U64 expectedMinBytes,
U32 expectedVersionId,
U64 expectedSignature,
char *fileName, int lineNumber, void *logCtx)
{
if (MEMCMP(&expectedTypeGuid, &Guid0, sizeof(GUID)) != 0)
/* caller wants us to verify type GUID */
if (MEMCMP(&(((CHANNEL_HEADER *) (pChannel))->Type),
&expectedTypeGuid, sizeof(GUID)) != 0) {
CHANNEL_GUID_MISMATCH(expectedTypeGuid, channelName,
"type", expectedTypeGuid,
((CHANNEL_HEADER *)
(pChannel))->Type, fileName,
lineNumber, logCtx);
return 0;
}
if (expectedMinBytes > 0) /* caller wants us to verify
* channel size */
if (((CHANNEL_HEADER *) (pChannel))->Size < expectedMinBytes) {
CHANNEL_U64_MISMATCH(expectedTypeGuid, channelName,
"size", expectedMinBytes,
((CHANNEL_HEADER *)
(pChannel))->Size, fileName,
lineNumber, logCtx);
return 0;
}
if (expectedVersionId > 0) /* caller wants us to verify
* channel version */
if (((CHANNEL_HEADER *) (pChannel))->VersionId !=
expectedVersionId) {
CHANNEL_U32_MISMATCH(expectedTypeGuid, channelName,
"version", expectedVersionId,
((CHANNEL_HEADER *)
(pChannel))->VersionId, fileName,
lineNumber, logCtx);
return 0;
}
if (expectedSignature > 0) /* caller wants us to verify
* channel signature */
if (((CHANNEL_HEADER *) (pChannel))->Signature !=
expectedSignature) {
CHANNEL_U64_MISMATCH(expectedTypeGuid, channelName,
"signature", expectedSignature,
((CHANNEL_HEADER *)
(pChannel))->Signature, fileName,
lineNumber, logCtx);
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
ULTRA_check_channel_server(GUID typeGuid,
char *channelName,
U64 expectedMinBytes,
U64 actualBytes,
char *fileName, int lineNumber, void *logCtx)
{
if (expectedMinBytes > 0) /* caller wants us to verify
* channel size */
if (actualBytes < expectedMinBytes) {
CHANNEL_U64_MISMATCH(typeGuid, channelName, "size",
expectedMinBytes, actualBytes,
fileName, lineNumber, logCtx);
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
ULTRA_channel_client_acquire_os(void *pChannel, U8 *chanId, void *logCtx,
char *file, int line, char *func)
{
CHANNEL_HEADER *pChan = (CHANNEL_HEADER *) (pChannel);
if (pChan->CliStateOS == CHANNELCLI_DISABLED) {
if ((pChan->
CliErrorOS & ULTRA_CLIERROROS_THROTTLEMSG_DISABLED) == 0) {
/* we are NOT throttling this message */
pChan->CliErrorOS |=
ULTRA_CLIERROROS_THROTTLEMSG_DISABLED;
/* throttle until acquire successful */
UltraLogEvent(logCtx,
CHANNELSTATE_DIAG_EVENTID_TRANSITERR,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel StateTransition INVALID! - acquire failed because OS client DISABLED @%s:%d\n",
chanId, PathName_Last_N_Nodes(
(U8 *) file, 4), line);
}
return 0;
}
if ((pChan->CliStateOS != CHANNELCLI_OWNED)
&& (pChan->CliStateBoot == CHANNELCLI_DISABLED)) {
/* Our competitor is DISABLED, so we can transition to OWNED */
UltraLogEvent(logCtx, CHANNELSTATE_DIAG_EVENTID_TRANSITOK,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel StateTransition (%s) %s(%d)-->%s(%d) @%s:%d\n",
chanId, "CliStateOS",
ULTRA_CHANNELCLI_STRING(pChan->CliStateOS),
pChan->CliStateOS,
ULTRA_CHANNELCLI_STRING(CHANNELCLI_OWNED),
CHANNELCLI_OWNED,
PathName_Last_N_Nodes((U8 *) file, 4), line);
pChan->CliStateOS = CHANNELCLI_OWNED;
MEMORYBARRIER;
}
if (pChan->CliStateOS == CHANNELCLI_OWNED) {
if (pChan->CliErrorOS != 0) {
/* we are in an error msg throttling state;
* come out of it */
UltraLogEvent(logCtx,
CHANNELSTATE_DIAG_EVENTID_TRANSITOK,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel OS client acquire now successful @%s:%d\n",
chanId, PathName_Last_N_Nodes((U8 *) file,
4), line);
pChan->CliErrorOS = 0;
}
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 (pChan->CliStateOS != CHANNELCLI_ATTACHED) {
if ((pChan->
CliErrorOS & ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED) ==
0) {
/* we are NOT throttling this message */
pChan->CliErrorOS |=
ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED;
/* throttle until acquire successful */
UltraLogEvent(logCtx,
CHANNELSTATE_DIAG_EVENTID_TRANSITERR,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel StateTransition INVALID! - acquire failed because OS client NOT ATTACHED (state=%s(%d)) @%s:%d\n",
chanId,
ULTRA_CHANNELCLI_STRING(pChan->CliStateOS),
pChan->CliStateOS,
PathName_Last_N_Nodes((U8 *) file, 4),
line);
}
return 0;
}
pChan->CliStateOS = CHANNELCLI_BUSY;
MEMORYBARRIER;
if (pChan->CliStateBoot == CHANNELCLI_BUSY) {
if ((pChan->CliErrorOS & ULTRA_CLIERROROS_THROTTLEMSG_BUSY) ==
0) {
/* we are NOT throttling this message */
pChan->CliErrorOS |= ULTRA_CLIERROROS_THROTTLEMSG_BUSY;
/* throttle until acquire successful */
UltraLogEvent(logCtx,
CHANNELSTATE_DIAG_EVENTID_TRANSITBUSY,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel StateTransition failed - host OS acquire failed because boot BUSY @%s:%d\n",
chanId, PathName_Last_N_Nodes((U8 *) file,
4), line);
}
pChan->CliStateOS = CHANNELCLI_ATTACHED; /* reset busy */
MEMORYBARRIER;
return 0;
}
if (pChan->CliErrorOS != 0) {
/* we are in an error msg throttling state; come out of it */
UltraLogEvent(logCtx, CHANNELSTATE_DIAG_EVENTID_TRANSITOK,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel OS client acquire now successful @%s:%d\n",
chanId, PathName_Last_N_Nodes((U8 *) file, 4),
line);
pChan->CliErrorOS = 0;
}
return 1;
}
static inline void
ULTRA_channel_client_release_os(void *pChannel, U8 *chanId, void *logCtx,
char *file, int line, char *func)
{
CHANNEL_HEADER *pChan = (CHANNEL_HEADER *) (pChannel);
if (pChan->CliErrorOS != 0) {
/* we are in an error msg throttling state; come out of it */
UltraLogEvent(logCtx, CHANNELSTATE_DIAG_EVENTID_TRANSITOK,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel OS client error state cleared @%s:%d\n",
chanId, PathName_Last_N_Nodes((U8 *) file, 4),
line);
pChan->CliErrorOS = 0;
}
if (pChan->CliStateOS == CHANNELCLI_OWNED)
return;
if (pChan->CliStateOS != CHANNELCLI_BUSY) {
UltraLogEvent(logCtx, CHANNELSTATE_DIAG_EVENTID_TRANSITERR,
CHANNELSTATE_DIAG_SEVERITY,
CHANNELSTATE_DIAG_SUBSYS, func, line,
"%s Channel StateTransition INVALID! - release failed because OS client NOT BUSY (state=%s(%d)) @%s:%d\n",
chanId,
ULTRA_CHANNELCLI_STRING(pChan->CliStateOS),
pChan->CliStateOS,
PathName_Last_N_Nodes((U8 *) file, 4), line);
/* return; */
}
pChan->CliStateOS = CHANNELCLI_ATTACHED; /* 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 SignalInsert(pCHANNEL_HEADER pChannel, U32 Queue, void *pSignal);
/*
* 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 SignalRemove(pCHANNEL_HEADER pChannel, U32 Queue, void *pSignal);
/*
* 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 SignalRemoveAll(pCHANNEL_HEADER pChannel, U32 Queue,
void *pSignal);
/*
* 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 SignalQueueIsEmpty(pCHANNEL_HEADER pChannel, U32 Queue);
#endif

46
drivers/staging/unisys/common-spar/include/version.h Normal file
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/* 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.
*/
/* version.h */
/* Common version/release info needed by all components goes here.
* (This file must compile cleanly in all environments.)
* Ultimately, this will be combined with defines generated dynamically as
* part of the sysgen, and some of the defines below may in fact end up
* being replaced with dynamically generated ones.
*/
#ifndef __VERSION_H__
#define __VERSION_H__
#define SPARVER1 "1"
#define SPARVER2 "0"
#define SPARVER3 "0"
#define SPARVER4 "0"
#define VERSION SPARVER1 "." SPARVER2 "." SPARVER3 "." SPARVER4
#define VERSIONDATE __DATE__
/* Here are various version forms needed in Windows environments.
*/
#define VISOR_PRODUCTVERSION SPARVERCOMMA
#define VISOR_PRODUCTVERSION_STR SPARVER1 "." SPARVER2 "." SPARVER3 "." \
SPARVER4
#define VISOR_OBJECTVERSION_STR SPARVER1 "," SPARVER2 "," SPARVER3 "," \
SPARVER4
#define COPYRIGHT "Unisys Corporation"
#define COPYRIGHTDATE "2010 - 2013"
#endif

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drivers/staging/unisys/include/commontypes.h Normal file
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/* 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.
*/
#ifndef _COMMONTYPES_H_
#define _COMMONTYPES_H_
/* define the following to prevent include nesting in kernel header files of
* similar abreviated content */
#define _SUPERVISOR_COMMONTYPES_H_
#ifdef __KERNEL__
#include <linux/types.h>
#include <linux/version.h>
#else
#include <stdint.h>
#include <syslog.h>
#endif
#define U8 uint8_t
#define U16 uint16_t
#define U32 uint32_t
#define U64 uint64_t
#define S8 int8_t
#define S16 int16_t
#define S32 int32_t
#define S64 int64_t
#ifdef __KERNEL__
#ifdef CONFIG_X86_32
#define UINTN U32
#else
#define UINTN U64
#endif
#else
#include <stdint.h>
#if __WORDSIZE == 32
#define UINTN U32
#elif __WORDSIZE == 64
#define UINTN U64
#else
#error Unsupported __WORDSIZE
#endif
#endif
typedef struct {
U32 data1;
U16 data2;
U16 data3;
U8 data4[8];
} __attribute__ ((__packed__)) GUID;
#ifndef GUID0
#define GUID0 {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0} }
#endif
typedef U64 GUEST_PHYSICAL_ADDRESS;
#define MEMSET(ptr, val, len) memset(ptr, val, len)
#define MEMCMP(m1, m2, len) memcmp(m1, m2, len)
#define STRLEN(s) ((UINTN)strlen((const char *)s))
#define STRCPY(d, s) (strcpy((char *)d, (const char *)s))
#define INLINE inline
#define OFFSETOF offsetof
#ifdef __KERNEL__
#define MEMORYBARRIER mb()
#define MEMCPY(dest, src, len) memcpy(dest, src, len)
#define CHANNEL_GUID_MISMATCH(chType, chName, field, expected, actual, fil, \
lin, logCtx) \
do { \
char s1[50], s2[50], s3[50]; \
pr_err("Channel mismatch on channel=%s(%s) field=%s expected=%s actual=%s @%s:%d\n", \
chName, GUID_format2(&chType, s1), field, \
GUID_format2(&expected, s2), GUID_format2(&actual, s3), \
fil, lin); \
} while (0)
#define CHANNEL_U32_MISMATCH(chType, chName, field, expected, actual, fil, \
lin, logCtx) \
do { \
char s1[50]; \
pr_err("Channel mismatch on channel=%s(%s) field=%s expected=0x%-8.8lx actual=0x%-8.8lx @%s:%d\n", \
chName, GUID_format2(&chType, s1), field, \
(unsigned long)expected, (unsigned long)actual, \
fil, lin); \
} while (0)
#define CHANNEL_U64_MISMATCH(chType, chName, field, expected, actual, fil, \
lin, logCtx) \
do { \
char s1[50]; \
pr_err("Channel mismatch on channel=%s(%s) field=%s expected=0x%-8.8Lx actual=0x%-8.8Lx @%s:%d\n", \
chName, GUID_format2(&chType, s1), field, \
(unsigned long long)expected, \
(unsigned long long)actual, \
fil, lin); \
} while (0)
#define UltraLogEvent(logCtx, EventId, Severity, SubsystemMask, pFunctionName, \
LineNumber, Str, args...) \
pr_info(Str, ## args)
#else
#define MEMCPY(dest, src, len) memcpy(dest, src, len)
#define MEMORYBARRIER mb()
#define CHANNEL_GUID_MISMATCH(chType, chName, field, expected, actual, fil, \
lin, logCtx) \
do { \
char s1[50], s2[50], s3[50]; \
syslog(LOG_USER | LOG_ERR, \
"Channel mismatch on channel=%s(%s) field=%s expected=%s actual=%s @%s:%d", \
chName, GUID_format2(&chType, s1), field, \
GUID_format2(&expected, s2), GUID_format2(&actual, s3), \
fil, lin); \
} while (0)
#define CHANNEL_U32_MISMATCH(chType, chName, field, expected, actual, fil, \
lin, logCtx) \
do { \
char s1[50]; \
syslog(LOG_USER | LOG_ERR, \
"Channel mismatch on channel=%s(%s) field=%s expected=0x%-8.8lx actual=0x%-8.8lx @%s:%d", \
chName, GUID_format2(&chType, s1), field, \
(unsigned long)expected, (unsigned long)actual, \
fil, lin); \
} while (0)
#define CHANNEL_U64_MISMATCH(chType, chName, field, expected, actual, fil, \
lin, logCtx) \
do { \
char s1[50]; \
syslog(LOG_USER | LOG_ERR, \
"Channel mismatch on channel=%s(%s) field=%s expected=0x%-8.8Lx actual=0x%-8.8Lx @%s:%d", \
chName, GUID_format2(&chType, s1), field, \
(unsigned long long)expected, \
(unsigned long long)actual, \
fil, lin); \
} while (0)
#define UltraLogEvent(logCtx, EventId, Severity, SubsystemMask, pFunctionName, \
LineNumber, Str, args...) \
syslog(LOG_USER | LOG_INFO, Str, ## args)
#endif
#define VolatileBarrier() MEMORYBARRIER
#endif
#include "guidutils.h"

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drivers/staging/unisys/include/guidutils.h Normal file
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/* 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.
*/
/* guidutils.h
*
* These are GUID manipulation inlines that can be used from either
* kernel-mode or user-mode.
*
*/
#ifndef __GUIDUTILS_H__
#define __GUIDUTILS_H__
#ifdef __KERNEL__
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ctype.h>
#define GUID_STRTOUL kstrtoul
#else
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#define GUID_STRTOUL strtoul
#endif
static inline char *
GUID_format1(const GUID *guid, char *s)
{
sprintf(s, "{%-8.8lx-%-4.4x-%-4.4x-%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x}",
(ulong) guid->data1,
guid->data2,
guid->data3,
guid->data4[0],
guid->data4[1],
guid->data4[2],
guid->data4[3],
guid->data4[4], guid->data4[5], guid->data4[6], guid->data4[7]);
return s;
}
/** Format a GUID in Microsoft's 'what in the world were they thinking'
* format.
*/
static inline char *
GUID_format2(const GUID *guid, char *s)
{
sprintf(s, "{%-8.8lx-%-4.4x-%-4.4x-%-2.2x%-2.2x-%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x}",
(ulong) guid->data1,
guid->data2,
guid->data3,
guid->data4[0],
guid->data4[1],
guid->data4[2],
guid->data4[3],
guid->data4[4], guid->data4[5], guid->data4[6], guid->data4[7]);
return s;
}
/**
* Like GUID_format2 but without the curly braces and the
* hex digits in upper case
*/
static inline char *
GUID_format3(const GUID *guid, char *s)
{
sprintf(s, "%-8.8lX-%-4.4X-%-4.4X-%-2.2X%-2.2X-%-2.2X%-2.2X%-2.2X%-2.2X%-2.2X%-2.2X",
(ulong) guid->data1,
guid->data2,
guid->data3,
guid->data4[0],
guid->data4[1],
guid->data4[2],
guid->data4[3],
guid->data4[4], guid->data4[5], guid->data4[6], guid->data4[7]);
return s;
}
/** Parse a guid string in any of these forms:
* {11111111-2222-3333-4455-66778899aabb}
* {11111111-2222-3333-445566778899aabb}
* 11111111-2222-3333-4455-66778899aabb
* 11111111-2222-3333-445566778899aabb
*/
static inline GUID
GUID_scan(U8 *p)
{
GUID guid = GUID0;
U8 x[33];
int count = 0;
int c, i = 0;
U8 cdata1[9];
U8 cdata2[5];
U8 cdata3[5];
U8 cdata4[3];
int dashcount = 0;
int brace = 0;
unsigned long uldata;
if (!p)
return guid;
if (*p == '{') {
p++;
brace = 1;
}
while (count < 32) {
if (*p == '}')
return guid;
if (*p == '\0')
return guid;
c = toupper(*p);
p++;
if (c == '-') {
switch (dashcount) {
case 0:
if (i != 8)
return guid;
break;
case 1:
if (i != 4)
return guid;
break;
case 2:
if (i != 4)
return guid;
break;
case 3:
if (i != 4)
return guid;
break;
default:
return guid;
}
dashcount++;
i = 0;
continue;
}
if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F'))
i++;
else
return guid;
x[count++] = c;
}
x[count] = '\0';
if (brace) {
if (*p == '}')
p++;
else
return guid;
}
if (dashcount == 3 || dashcount == 4)
;
else
return guid;
memset(cdata1, 0, sizeof(cdata1));
memset(cdata2, 0, sizeof(cdata2));
memset(cdata3, 0, sizeof(cdata3));
memset(cdata4, 0, sizeof(cdata4));
memcpy(cdata1, x + 0, 8);
memcpy(cdata2, x + 8, 4);
memcpy(cdata3, x + 12, 4);
if (GUID_STRTOUL((char *) cdata1, 16, &uldata) == 0)
guid.data1 = (U32)uldata;
if (GUID_STRTOUL((char *) cdata2, 16, &uldata) == 0)
guid.data2 = (U16)uldata;
if (GUID_STRTOUL((char *) cdata3, 16, &uldata) == 0)
guid.data3 = (U16)uldata;
for (i = 0; i < 8; i++) {
memcpy(cdata4, x + 16 + (i * 2), 2);
if (GUID_STRTOUL((char *) cdata4, 16, &uldata) == 0)
guid.data4[i] = (U8) uldata;
}
return guid;
}
static inline char *
GUID_sanitize(char *inputGuidStr, char *outputGuidStr)
{
GUID g;
GUID guid0 = GUID0;
*outputGuidStr = '\0';
g = GUID_scan((U8 *) inputGuidStr);
if (memcmp(&g, &guid0, sizeof(GUID)) == 0)
return outputGuidStr; /* bad GUID format */
return GUID_format1(&g, outputGuidStr);
}
#endif

10
drivers/staging/unisys/visorchannel/Kconfig Normal file
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#
# Unisys visorchannel configuration
#
config UNISYS_VISORCHANNEL
tristate "Unisys visorchannel driver"
depends on UNISYSSPAR && UNISYS_VISORUTIL
---help---
If you say Y here, you will enable the Unisys visorchannel driver.

14
drivers/staging/unisys/visorchannel/Makefile Normal file
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#
# 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
ccflags-y += -DCONFIG_SPAR_GUEST -DGUESTDRIVERBUILD -DNOAUTOVERSION

29
drivers/staging/unisys/visorchannel/globals.h Normal file
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/* globals.h
*
* 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.
*/
#ifndef __VISORCHANNEL_GLOBALS_H__
#define __VISORCHANNEL_GLOBALS_H__
#include "uniklog.h"
#include "timskmod.h"
#include "memregion.h"
#include "version.h"
#define MYDRVNAME "visorchannel"
#endif

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drivers/staging/unisys/visorchannel/visorchannel.h Normal file
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/* visorchannel.h
*
* 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.
*/
#ifndef __VISORCHANNEL_H__
#define __VISORCHANNEL_H__
#include "commontypes.h"
#include "memregion.h"
#include "channel.h"
#ifndef HOSTADDRESS
#define HOSTADDRESS U64
#endif
#ifndef BOOL
#define BOOL int
#endif
/* VISORCHANNEL is an opaque structure to users.
* Fields are declared only in the implementation .c files.
*/
typedef struct VISORCHANNEL_Tag VISORCHANNEL;
/* Note that for visorchannel_create() and visorchannel_create_overlapped(),
* <channelBytes> 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.
*/
VISORCHANNEL *visorchannel_create(HOSTADDRESS physaddr,
ulong channelBytes, GUID guid);
VISORCHANNEL *visorchannel_create_overlapped(ulong channelBytes,
VISORCHANNEL *parent, ulong off,
GUID guid);
VISORCHANNEL *visorchannel_create_with_lock(HOSTADDRESS physaddr,
ulong channelBytes, GUID guid);
VISORCHANNEL *visorchannel_create_overlapped_with_lock(ulong channelBytes,
VISORCHANNEL *parent,
ulong off, GUID guid);
void visorchannel_destroy(VISORCHANNEL *channel);
int visorchannel_read(VISORCHANNEL *channel, ulong offset,
void *local, ulong nbytes);
int visorchannel_write(VISORCHANNEL *channel, ulong offset,
void *local, ulong nbytes);
int visorchannel_clear(VISORCHANNEL *channel, ulong offset,
U8 ch, ulong nbytes);
BOOL visorchannel_signalremove(VISORCHANNEL *channel, U32 queue, void *msg);
BOOL visorchannel_signalinsert(VISORCHANNEL *channel, U32 queue, void *msg);
int visorchannel_signalqueue_slots_avail(VISORCHANNEL *channel, U32 queue);
int visorchannel_signalqueue_max_slots(VISORCHANNEL *channel, U32 queue);
HOSTADDRESS visorchannel_get_physaddr(VISORCHANNEL *channel);
ulong visorchannel_get_nbytes(VISORCHANNEL *channel);
char *visorchannel_id(VISORCHANNEL *channel, char *s);
char *visorchannel_zoneid(VISORCHANNEL *channel, char *s);
U64 visorchannel_get_clientpartition(VISORCHANNEL *channel);
GUID visorchannel_get_GUID(VISORCHANNEL *channel);
MEMREGION *visorchannel_get_memregion(VISORCHANNEL *channel);
char *visorchannel_GUID_id(GUID *guid, char *s);
void visorchannel_debug(VISORCHANNEL *channel, int nQueues,
struct seq_file *seq, U32 off);
void visorchannel_dump_section(VISORCHANNEL *chan, char *s,
int off, int len, struct seq_file *seq);
void *visorchannel_get_header(VISORCHANNEL *channel);
#define VISORCHANNEL_CHANGE_SERVER_STATE(chan, chanId, newstate) \
do { \
U8 *p = (U8 *)visorchannel_get_header(chan); \
if (p) { \
ULTRA_CHANNEL_SERVER_TRANSITION(p, chanId, SrvState, \
newstate, logCtx); \
visorchannel_write \
(chan, \
offsetof(ULTRA_CHANNEL_PROTOCOL, SrvState), \
p + \
offsetof(ULTRA_CHANNEL_PROTOCOL, SrvState), \
sizeof(U32)); \
} \
} while (0)
#define VISORCHANNEL_CHANGE_CLIENT_STATE(chan, chanId, newstate) \
do { \
U8 *p = (U8 *)visorchannel_get_header(chan); \
if (p) { \
ULTRA_CHANNEL_CLIENT_TRANSITION(p, chanId, CliStateOS, \
newstate, logCtx); \
visorchannel_write \
(chan, \
offsetof(ULTRA_CHANNEL_PROTOCOL, CliStateOS), \
p + \
offsetof(ULTRA_CHANNEL_PROTOCOL, CliStateOS), \
sizeof(U32)); \
} \
} while (0)
#endif

765
drivers/staging/unisys/visorchannel/visorchannel_funcs.c Normal file
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/* visorchannel_funcs.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.
*/
/*
* 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.)
*/
#include "globals.h"
#include "visorchannel.h"
#include "guidutils.h"
#define MYDRVNAME "visorchannel"
struct VISORCHANNEL_Tag {
MEMREGION *memregion; /* from memregion_create() */
CHANNEL_HEADER chan_hdr;
GUID guid;
ulong size;
BOOL needs_lock;
spinlock_t insert_lock;
spinlock_t remove_lock;
struct {
SIGNAL_QUEUE_HEADER req_queue;
SIGNAL_QUEUE_HEADER rsp_queue;
SIGNAL_QUEUE_HEADER event_queue;
SIGNAL_QUEUE_HEADER ack_queue;
} safe_uis_queue;
};
/* Creates the VISORCHANNEL abstraction for a data area in memory, but does
* NOT modify this data area.
*/
static VISORCHANNEL *
visorchannel_create_guts(HOSTADDRESS physaddr, ulong channelBytes,
VISORCHANNEL *parent, ulong off, GUID guid,
BOOL needs_lock)
{
VISORCHANNEL *p = NULL;
void *rc = NULL;
p = kmalloc(sizeof(VISORCHANNEL), GFP_KERNEL|__GFP_NORETRY);
if (p == NULL)
FAIL("allocation failed", 0);
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 == NULL)
p->memregion =
memregion_create(physaddr, sizeof(CHANNEL_HEADER));
else
p->memregion =
memregion_create_overlapped
(parent->memregion, off, sizeof(CHANNEL_HEADER));
if (p->memregion == NULL)
FAIL("memregion_create failed", 0);
if (memregion_read(p->memregion, 0, &p->chan_hdr,
sizeof(CHANNEL_HEADER)) < 0)
FAIL("memregion_read failed", 0);
if (channelBytes == 0)
/* we had better be a CLIENT of this channel */
channelBytes = (ulong) p->chan_hdr.Size;
if (STRUCTSEQUAL(guid, Guid0))
/* we had better be a CLIENT of this channel */
guid = p->chan_hdr.Type;
if (memregion_resize(p->memregion, channelBytes) < 0)
FAIL("memregion_resize failed", 0);
p->size = channelBytes;
p->guid = guid;
RETPTR(p);
Away:
if (rc == NULL) {
if (p != NULL) {
visorchannel_destroy(p);
p = NULL;
}
}
return rc;
}
VISORCHANNEL *
visorchannel_create(HOSTADDRESS physaddr, ulong channelBytes, GUID guid)
{
return visorchannel_create_guts(physaddr, channelBytes, NULL, 0, guid,
FALSE);
}
EXPORT_SYMBOL_GPL(visorchannel_create);
VISORCHANNEL *
visorchannel_create_with_lock(HOSTADDRESS physaddr, ulong channelBytes,
GUID guid)
{
return visorchannel_create_guts(physaddr, channelBytes, NULL, 0, guid,
TRUE);
}
EXPORT_SYMBOL_GPL(visorchannel_create_with_lock);
VISORCHANNEL *
visorchannel_create_overlapped(ulong channelBytes,
VISORCHANNEL *parent, ulong off, GUID guid)
{
return visorchannel_create_guts(0, channelBytes, parent, off, guid,
FALSE);
}
EXPORT_SYMBOL_GPL(visorchannel_create_overlapped);
VISORCHANNEL *
visorchannel_create_overlapped_with_lock(ulong channelBytes,
VISORCHANNEL *parent, ulong off,
GUID guid)
{
return visorchannel_create_guts(0, channelBytes, parent, off, guid,
TRUE);
}
EXPORT_SYMBOL_GPL(visorchannel_create_overlapped_with_lock);
void
visorchannel_destroy(VISORCHANNEL *channel)
{
if (channel == NULL)
return;
if (channel->memregion != NULL) {
memregion_destroy(channel->memregion);
channel->memregion = NULL;
}
kfree(channel);
}
EXPORT_SYMBOL_GPL(visorchannel_destroy);
HOSTADDRESS
visorchannel_get_physaddr(VISORCHANNEL *channel)
{
return memregion_get_physaddr(channel->memregion);
}
EXPORT_SYMBOL_GPL(visorchannel_get_physaddr);
ulong
visorchannel_get_nbytes(VISORCHANNEL *channel)
{
return channel->size;
}
EXPORT_SYMBOL_GPL(visorchannel_get_nbytes);
char *
visorchannel_GUID_id(GUID *guid, char *s)
{
return GUID_format1(guid, s);
}
EXPORT_SYMBOL_GPL(visorchannel_GUID_id);
char *
visorchannel_id(VISORCHANNEL *channel, char *s)
{
return visorchannel_GUID_id(&channel->guid, s);
}
EXPORT_SYMBOL_GPL(visorchannel_id);
char *
visorchannel_zoneid(VISORCHANNEL *channel, char *s)
{
return visorchannel_GUID_id(&channel->chan_hdr.ZoneGuid, s);
}
EXPORT_SYMBOL_GPL(visorchannel_zoneid);
HOSTADDRESS
visorchannel_get_clientpartition(VISORCHANNEL *channel)
{
return channel->chan_hdr.PartitionHandle;
}
EXPORT_SYMBOL_GPL(visorchannel_get_clientpartition);
GUID
visorchannel_get_GUID(VISORCHANNEL *channel)
{
return channel->guid;
}
EXPORT_SYMBOL_GPL(visorchannel_get_GUID);
MEMREGION *
visorchannel_get_memregion(VISORCHANNEL *channel)
{
return channel->memregion;
}
EXPORT_SYMBOL_GPL(visorchannel_get_memregion);
pSIGNAL_QUEUE_HEADER
visorchannel_get_safe_queue(VISORCHANNEL *pchannel, U32 queue)
{
switch (queue) {
case 0:
return &pchannel->safe_uis_queue.req_queue;
case 1:
return &pchannel->safe_uis_queue.rsp_queue;
case 2:
return &pchannel->safe_uis_queue.event_queue;
case 3:
return &pchannel->safe_uis_queue.ack_queue;
default:
ERRDRV("Invalid queue value %d\n", queue);
return NULL;
}
} /* end visorchannel_get_safe_queue */
int
visorchannel_read(VISORCHANNEL *channel, ulong offset,
void *local, ulong nbytes)
{
int rc = memregion_read(channel->memregion, offset, local, nbytes);
if ((rc >= 0) && (offset == 0) && (nbytes >= sizeof(CHANNEL_HEADER)))
memcpy(&channel->chan_hdr, local, sizeof(CHANNEL_HEADER));
return rc;
}
EXPORT_SYMBOL_GPL(visorchannel_read);
int
visorchannel_write(VISORCHANNEL *channel, ulong offset,
void *local, ulong nbytes)
{
if (offset == 0 && nbytes >= sizeof(CHANNEL_HEADER))
memcpy(&channel->chan_hdr, local, sizeof(CHANNEL_HEADER));
return memregion_write(channel->memregion, offset, local, nbytes);
}
EXPORT_SYMBOL_GPL(visorchannel_write);
int
visorchannel_clear(VISORCHANNEL *channel, ulong offset, U8 ch, ulong nbytes)
{
int rc = -1;
int bufsize = 65536;
int written = 0;
U8 *buf = vmalloc(bufsize);
if (buf == NULL) {
ERRDRV("%s failed memory allocation", __func__);
RETINT(-1);
}
memset(buf, ch, bufsize);
while (nbytes > 0) {
ulong thisbytes = bufsize;
int x = -1;
if (nbytes < thisbytes)
thisbytes = nbytes;
x = memregion_write(channel->memregion, offset + written,
buf, thisbytes);
if (x < 0)
RETINT(x);
written += thisbytes;
nbytes -= thisbytes;
}
RETINT(0);
Away:
if (buf != NULL) {
vfree(buf);
buf = NULL;
}
return rc;
}
EXPORT_SYMBOL_GPL(visorchannel_clear);
void *
visorchannel_get_header(VISORCHANNEL *channel)
{
return (void *) &(channel->chan_hdr);
}
EXPORT_SYMBOL_GPL(visorchannel_get_header);
/** Return offset of a specific SIGNAL_QUEUE_HEADER from the beginning of a
* channel header
*/
#define SIG_QUEUE_OFFSET(chan_hdr, q) \
((chan_hdr)->oChannelSpace + ((q) * sizeof(SIGNAL_QUEUE_HEADER)))
/** Return offset of a specific queue entry (data) from the beginning of a
* channel header
*/
#define SIG_DATA_OFFSET(chan_hdr, q, sig_hdr, slot) \
(SIG_QUEUE_OFFSET(chan_hdr, q) + (sig_hdr)->oSignalBase + \
((slot) * (sig_hdr)->SignalSize))
/** 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) \
(memregion_write(channel->memregion, \
SIG_QUEUE_OFFSET(&channel->chan_hdr, queue)+\
offsetof(SIGNAL_QUEUE_HEADER, FIELD), \
&((sig_hdr)->FIELD), \
sizeof((sig_hdr)->FIELD)) >= 0)
static BOOL
sig_read_header(VISORCHANNEL *channel, U32 queue,
SIGNAL_QUEUE_HEADER *sig_hdr)
{
BOOL rc = FALSE;
if (channel->chan_hdr.oChannelSpace < sizeof(CHANNEL_HEADER))
FAIL("oChannelSpace too small", FALSE);
/* Read the appropriate SIGNAL_QUEUE_HEADER into local memory. */
if (memregion_read(channel->memregion,
SIG_QUEUE_OFFSET(&channel->chan_hdr, queue),
sig_hdr, sizeof(SIGNAL_QUEUE_HEADER)) < 0) {
ERRDRV("queue=%d SIG_QUEUE_OFFSET=%d",
queue, (int)SIG_QUEUE_OFFSET(&channel->chan_hdr, queue));
FAIL("memregion_read of signal queue failed", FALSE);
}
RETBOOL(TRUE);
Away:
return rc;
}
static BOOL
sig_do_data(VISORCHANNEL *channel, U32 queue,
SIGNAL_QUEUE_HEADER *sig_hdr, U32 slot, void *data, BOOL is_write)
{
BOOL rc = FALSE;
int signal_data_offset = SIG_DATA_OFFSET(&channel->chan_hdr, queue,
sig_hdr, slot);
if (is_write) {
if (memregion_write(channel->memregion, signal_data_offset,
data, sig_hdr->SignalSize) < 0)
FAIL("memregion_write of signal data failed", FALSE);
} else {
if (memregion_read(channel->memregion, signal_data_offset,
data, sig_hdr->SignalSize) < 0)
FAIL("memregion_read of signal data failed", FALSE);
}
RETBOOL(TRUE);
Away:
return rc;
}
static inline BOOL
sig_read_data(VISORCHANNEL *channel, U32 queue,
SIGNAL_QUEUE_HEADER *sig_hdr, U32 slot, void *data)
{
return sig_do_data(channel, queue, sig_hdr, slot, data, FALSE);
}
static inline BOOL
sig_write_data(VISORCHANNEL *channel, U32 queue,
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(pSIGNAL_QUEUE_HEADER psafe_sqh,
pSIGNAL_QUEUE_HEADER punsafe_sqh,
U32 *phead, U32 *ptail)
{
if ((*phead >= psafe_sqh->MaxSignalSlots)
|| (*ptail >= psafe_sqh->MaxSignalSlots)) {
/* Choose 0 or max, maybe based on current tail value */
*phead = 0;
*ptail = 0;
/* Sync with client as necessary */
punsafe_sqh->Head = *phead;
punsafe_sqh->Tail = *ptail;
ERRDRV("safe_sig_queue_validate: head = 0x%x, tail = 0x%x, MaxSlots = 0x%x",
*phead, *ptail, psafe_sqh->MaxSignalSlots);
return 0;
}
return 1;
} /* end safe_sig_queue_validate */
BOOL
visorchannel_signalremove(VISORCHANNEL *channel, U32 queue, void *msg)
{
BOOL rc = FALSE;
SIGNAL_QUEUE_HEADER sig_hdr;
if (channel->needs_lock)
spin_lock(&channel->remove_lock);
if (!sig_read_header(channel, queue, &sig_hdr))
RETBOOL(FALSE);
if (sig_hdr.Head == sig_hdr.Tail)
RETBOOL(FALSE); /* no signals to remove */
sig_hdr.Tail = (sig_hdr.Tail + 1) % sig_hdr.MaxSignalSlots;
if (!sig_read_data(channel, queue, &sig_hdr, sig_hdr.Tail, msg))
FAIL("sig_read_data failed", FALSE);
sig_hdr.NumSignalsReceived++;
/* For each data field in SIGNAL_QUEUE_HEADER that was modified,
* update host memory.
*/
MEMORYBARRIER;
if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, Tail))
FAIL("memregion_write of Tail failed", FALSE);
if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, NumSignalsReceived))
FAIL("memregion_write of NumSignalsReceived failed", FALSE);
RETBOOL(TRUE);
Away:
if (channel->needs_lock)
spin_unlock(&channel->remove_lock);
return rc;
}
EXPORT_SYMBOL_GPL(visorchannel_signalremove);
BOOL
visorchannel_safesignalremove(VISORCHANNEL *channel, U32 queue, void *msg)
{
BOOL rc = FALSE;
SIGNAL_QUEUE_HEADER *psafe_sqh, unsafe_sqh;
int stat;
if (channel->needs_lock)
spin_lock(&channel->remove_lock);
if (!sig_read_header(channel, queue, &unsafe_sqh))
RETBOOL(FALSE);
psafe_sqh = visorchannel_get_safe_queue(channel, queue);
if (psafe_sqh == NULL) {
ERRDRV("safesignalremove: get_safe_queue failed\n");
RETBOOL(FALSE);
}
stat =
safe_sig_queue_validate(psafe_sqh, &unsafe_sqh, &unsafe_sqh.Head,
&unsafe_sqh.Tail);
if (stat == 0) {
ERRDRV("safe_signal_remove: safe_sig_queue_validate failed, queue = %d",
queue);
RETBOOL(FALSE);
}
if (unsafe_sqh.Head == unsafe_sqh.Tail)
RETBOOL(FALSE); /* no signals to remove */
unsafe_sqh.Tail = (unsafe_sqh.Tail + 1) % psafe_sqh->MaxSignalSlots;
if (!sig_read_data(channel, queue, psafe_sqh, unsafe_sqh.Tail, msg))
FAIL("sig_read_data failed", FALSE);
unsafe_sqh.NumSignalsReceived++;
/* For each data field in SIGNAL_QUEUE_HEADER that was modified,
* update host memory.
*/
MEMORYBARRIER;
if (!SIG_WRITE_FIELD(channel, queue, &unsafe_sqh, Tail))
FAIL("memregion_write of Tail failed", FALSE);
if (!SIG_WRITE_FIELD(channel, queue, &unsafe_sqh, NumSignalsReceived))
FAIL("memregion_write of NumSignalsReceived failed", FALSE);
RETBOOL(TRUE);
Away:
if (channel->needs_lock)
spin_unlock(&channel->remove_lock);
return rc;
} /* end visorchannel_safesignalremove */
BOOL
visorchannel_signalinsert(VISORCHANNEL *channel, U32 queue, void *msg)
{
BOOL rc = FALSE;
SIGNAL_QUEUE_HEADER sig_hdr;
if (channel->needs_lock)
spin_lock(&channel->insert_lock);
if (!sig_read_header(channel, queue, &sig_hdr))
RETBOOL(FALSE);
sig_hdr.Head = ((sig_hdr.Head + 1) % sig_hdr.MaxSignalSlots);
if (sig_hdr.Head == sig_hdr.Tail) {
#if 0
ERRDRV("visorchannel queue #%d overflow (max slots=%d)",
queue, sig_hdr.MaxSignalSlots);
#endif
sig_hdr.NumOverflows++;
if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, NumOverflows))
FAIL("memregion_write of NumOverflows failed", FALSE);
RETBOOL(FALSE);
}
if (!sig_write_data(channel, queue, &sig_hdr, sig_hdr.Head, msg))
FAIL("sig_write_data failed", FALSE);
sig_hdr.NumSignalsSent++;
/* For each data field in SIGNAL_QUEUE_HEADER that was modified,
* update host memory.
*/
MEMORYBARRIER;
if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, Head))
FAIL("memregion_write of Head failed", FALSE);
if (!SIG_WRITE_FIELD(channel, queue, &sig_hdr, NumSignalsSent))
FAIL("memregion_write of NumSignalsSent failed", FALSE);
RETBOOL(TRUE);
Away:
if (channel->needs_lock)
spin_unlock(&channel->insert_lock);
return rc;
}
EXPORT_SYMBOL_GPL(visorchannel_signalinsert);
int
visorchannel_signalqueue_slots_avail(VISORCHANNEL *channel, U32 queue)
{
SIGNAL_QUEUE_HEADER sig_hdr;
U32 slots_avail, slots_used;
U32 head, tail;
if (!sig_read_header(channel, queue, &sig_hdr))
return 0;
head = sig_hdr.Head;
tail = sig_hdr.Tail;
if (head < tail)
head = head + sig_hdr.MaxSignalSlots;
slots_used = (head - tail);
slots_avail = sig_hdr.MaxSignals - slots_used;
return (int) slots_avail;
}
EXPORT_SYMBOL_GPL(visorchannel_signalqueue_slots_avail);
int
visorchannel_signalqueue_max_slots(VISORCHANNEL *channel, U32 queue)
{
SIGNAL_QUEUE_HEADER sig_hdr;
if (!sig_read_header(channel, queue, &sig_hdr))
return 0;
return (int) sig_hdr.MaxSignals;
}
EXPORT_SYMBOL_GPL(visorchannel_signalqueue_max_slots);
BOOL
visorchannel_safesignalinsert(VISORCHANNEL *channel, U32 queue, void *msg)
{
BOOL rc = FALSE;
SIGNAL_QUEUE_HEADER *psafe_sqh, unsafe_sqh;
int stat;
if (channel->needs_lock)
spin_lock(&channel->insert_lock);
if (!sig_read_header(channel, queue, &unsafe_sqh))
RETBOOL(FALSE);
psafe_sqh = visorchannel_get_safe_queue(channel, queue);
if (psafe_sqh == NULL) {
ERRDRV("safesignalinsert: get_safe_queue failed\n");
RETBOOL(FALSE);
}
unsafe_sqh.Head = ((unsafe_sqh.Head + 1) % psafe_sqh->MaxSignalSlots);
stat =
safe_sig_queue_validate(psafe_sqh, &unsafe_sqh, &unsafe_sqh.Head,
&unsafe_sqh.Tail);
if (stat == 0) {
ERRDRV("safe_signal_insert: safe_sig_queue_validate failed, queue = %d",
queue);
RETBOOL(FALSE);
}
if (unsafe_sqh.Head == unsafe_sqh.Tail) {
#if 0
ERRDRV("visorchannel queue #%d overflow (max slots=%d)",
queue, psafe_sqh->MaxSignalSlots);
#endif
unsafe_sqh.NumOverflows++;
if (!SIG_WRITE_FIELD(channel, queue, &unsafe_sqh, NumOverflows))
FAIL("memregion_write of NumOverflows failed", FALSE);
RETBOOL(FALSE);
}
if (!sig_write_data(channel, queue, psafe_sqh, unsafe_sqh.Head, msg))
FAIL("sig_write_data failed", FALSE);
unsafe_sqh.NumSignalsSent++;
/* For each data field in SIGNAL_QUEUE_HEADER that was modified,
* update host memory.
*/
MEMORYBARRIER;
if (!SIG_WRITE_FIELD(channel, queue, &unsafe_sqh, Head))
FAIL("memregion_write of Head failed", FALSE);
if (!SIG_WRITE_FIELD(channel, queue, &unsafe_sqh, NumSignalsSent))
FAIL("memregion_write of NumSignalsSent failed", FALSE);
RETBOOL(TRUE);
Away:
if (channel->needs_lock)
spin_unlock(&channel->insert_lock);
return rc;
} /* end visorchannel_safesignalinsert */
static void
sigqueue_debug(SIGNAL_QUEUE_HEADER *q, int which, struct seq_file *seq)
{
seq_printf(seq, "Signal Queue #%d\n", which);
seq_printf(seq, " VersionId = %lu\n", (ulong) q->VersionId);
seq_printf(seq, " Type = %lu\n", (ulong) q->Type);
seq_printf(seq, " oSignalBase = %llu\n",
(long long) q->oSignalBase);
seq_printf(seq, " SignalSize = %lu\n", (ulong) q->SignalSize);
seq_printf(seq, " MaxSignalSlots = %lu\n",
(ulong) q->MaxSignalSlots);
seq_printf(seq, " MaxSignals = %lu\n", (ulong) q->MaxSignals);
seq_printf(seq, " FeatureFlags = %-16.16Lx\n",
(long long) q->FeatureFlags);
seq_printf(seq, " NumSignalsSent = %llu\n",
(long long) q->NumSignalsSent);
seq_printf(seq, " NumSignalsReceived = %llu\n",
(long long) q->NumSignalsReceived);
seq_printf(seq, " NumOverflows = %llu\n",
(long long) q->NumOverflows);
seq_printf(seq, " Head = %lu\n", (ulong) q->Head);
seq_printf(seq, " Tail = %lu\n", (ulong) q->Tail);
}
void
visorchannel_debug(VISORCHANNEL *channel, int nQueues,
struct seq_file *seq, U32 off)
{
HOSTADDRESS addr = 0;
ulong nbytes = 0, nbytes_region = 0;
MEMREGION *memregion = NULL;
CHANNEL_HEADER hdr;
CHANNEL_HEADER *phdr = &hdr;
char s[99];
int i = 0;
int errcode = 0;
if (channel == NULL) {
ERRDRV("%s no channel", __func__);
return;
}
memregion = channel->memregion;
if (memregion == NULL) {
ERRDRV("%s no memregion", __func__);
return;
}
addr = memregion_get_physaddr(memregion);
nbytes_region = memregion_get_nbytes(memregion);
errcode = visorchannel_read(channel, off,
phdr, sizeof(CHANNEL_HEADER));
if (errcode < 0) {
seq_printf(seq,
"Read of channel header failed with errcode=%d)\n",
errcode);
if (off == 0) {
phdr = &channel->chan_hdr;
seq_puts(seq, "(following data may be stale)\n");
} else
return;
}
nbytes = (ulong) (phdr->Size);
seq_printf(seq, "--- Begin channel @0x%-16.16Lx for 0x%lx bytes (region=0x%lx bytes) ---\n",
addr + off, nbytes, nbytes_region);
seq_printf(seq, "Type = %s\n", GUID_format2(&phdr->Type, s));
seq_printf(seq, "ZoneGuid = %s\n",
GUID_format2(&phdr->ZoneGuid, s));
seq_printf(seq, "Signature = 0x%-16.16Lx\n",
(long long) phdr->Signature);
seq_printf(seq, "LegacyState = %lu\n", (ulong) phdr->LegacyState);
seq_printf(seq, "SrvState = %lu\n", (ulong) phdr->SrvState);
seq_printf(seq, "CliStateBoot = %lu\n", (ulong) phdr->CliStateBoot);
seq_printf(seq, "CliStateOS = %lu\n", (ulong) phdr->CliStateOS);
seq_printf(seq, "HeaderSize = %lu\n", (ulong) phdr->HeaderSize);
seq_printf(seq, "Size = %llu\n", (long long) phdr->Size);
seq_printf(seq, "Features = 0x%-16.16llx\n",
(long long) phdr->Features);
seq_printf(seq, "PartitionHandle = 0x%-16.16llx\n",
(long long) phdr->PartitionHandle);
seq_printf(seq, "Handle = 0x%-16.16llx\n",
(long long) phdr->Handle);
seq_printf(seq, "VersionId = %lu\n", (ulong) phdr->VersionId);
seq_printf(seq, "oChannelSpace = %llu\n",
(long long) phdr->oChannelSpace);
if ((phdr->oChannelSpace == 0) || (errcode < 0))
;
else
for (i = 0; i < nQueues; i++) {
SIGNAL_QUEUE_HEADER q;
errcode = visorchannel_read(channel,
off + phdr->oChannelSpace +
(i * sizeof(q)),
&q, sizeof(q));
if (errcode < 0) {
seq_printf(seq,
"failed to read signal queue #%d from channel @0x%-16.16Lx errcode=%d\n",
i, addr, errcode);
continue;
}
sigqueue_debug(&q, i, seq);
}
seq_printf(seq, "--- End channel @0x%-16.16Lx for 0x%lx bytes ---\n",
addr + off, nbytes);
}
EXPORT_SYMBOL_GPL(visorchannel_debug);
void
visorchannel_dump_section(VISORCHANNEL *chan, char *s,
int off, int len, struct seq_file *seq)
{
char *buf = NULL, *fmtbuf = NULL;
int fmtbufsize = 0;
int i = 0;
int errcode = 0;
fmtbufsize = 100 * COVQ(len, 16);
buf = kmalloc(len, GFP_KERNEL|__GFP_NORETRY);
fmtbuf = kmalloc(fmtbufsize, GFP_KERNEL|__GFP_NORETRY);
if (buf == NULL || fmtbuf == NULL)
goto Away;
errcode = visorchannel_read(chan, off, buf, len);
if (errcode < 0) {
ERRDRV("%s failed to read %s from channel errcode=%d",
s, __func__, errcode);
goto Away;
}
seq_printf(seq, "channel %s:\n", s);
hexDumpToBuffer(fmtbuf, fmtbufsize, " ", buf, len, 16);
for (i = 0; fmtbuf[i] != '\0'; i++)
seq_printf(seq, "%c", fmtbuf[i]);
Away:
if (buf != NULL) {
kfree(buf);
buf = NULL;
}
if (fmtbuf != NULL) {
kfree(fmtbuf);
fmtbuf = NULL;
}
}
EXPORT_SYMBOL_GPL(visorchannel_dump_section);

49
drivers/staging/unisys/visorchannel/visorchannel_main.c Normal file
View File

@ -0,0 +1,49 @@
/* visorchannel_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.
*/
/*
* This is a module "wrapper" around visorchannel_funcs.
*/
#include "globals.h"
#include "channel.h"
#include "visorchannel.h"
#include "guidutils.h"
#define MYDRVNAME "visorchannel"
static int __init
visorchannel_init(void)
{
INFODRV("driver version %s loaded", VERSION);
return 0;
}
static void
visorchannel_exit(void)
{
INFODRV("driver unloaded");
}
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);