The visorchannel module is a support library that abstracts reading
and writing a channel in memory.
Signed-off-by: Ken Cox <jkc@xxxxxxxxxx>
Cc: Ben Romer <sparmaintainer@xxxxxxxxxx>
Index: upstream-staging/drivers/staging/unisys/Kconfig
===================================================================
--- upstream-staging.orig/drivers/staging/unisys/Kconfig
+++ upstream-staging/drivers/staging/unisys/Kconfig
@@ -10,5 +10,6 @@ menuconfig UNISYSSPAR
if UNISYSSPAR
source "drivers/staging/unisys/visorutil/Kconfig"
+source "drivers/staging/unisys/visorchannel/Kconfig"
endif # UNISYSSPAR
Index: upstream-staging/drivers/staging/unisys/Makefile
===================================================================
--- upstream-staging.orig/drivers/staging/unisys/Makefile
+++ upstream-staging/drivers/staging/unisys/Makefile
@@ -2,4 +2,5 @@
# Makefile for Unisys SPAR drivers
#
obj-$(CONFIG_UNISYS_VISORUTIL) += visorutil/
+obj-$(CONFIG_UNISYS_VISORCHANNEL) += visorchannel/
Index: upstream-staging/drivers/staging/unisys/common-spar/include/channels/channel.h
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/common-spar/include/channels/channel.h
@@ -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
Index: upstream-staging/drivers/staging/unisys/common-spar/include/version.h
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/common-spar/include/version.h
@@ -0,0 +1,46 @@
+/* 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
Index: upstream-staging/drivers/staging/unisys/include/commontypes.h
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/include/commontypes.h
@@ -0,0 +1,166 @@
+/* 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"
Index: upstream-staging/drivers/staging/unisys/include/guidutils.h
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/include/guidutils.h
@@ -0,0 +1,203 @@
+/* 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
Index: upstream-staging/drivers/staging/unisys/visorchannel/Kconfig
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/visorchannel/Kconfig
@@ -0,0 +1,10 @@
+#
+# 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.
+
Index: upstream-staging/drivers/staging/unisys/visorchannel/Makefile
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/visorchannel/Makefile
@@ -0,0 +1,14 @@
+#
+# 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
+
Index: upstream-staging/drivers/staging/unisys/visorchannel/globals.h
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/visorchannel/globals.h
@@ -0,0 +1,29 @@
+/* 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
Index: upstream-staging/drivers/staging/unisys/visorchannel/visorchannel.h
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/visorchannel/visorchannel.h
@@ -0,0 +1,106 @@
+/* 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
Index: upstream-staging/drivers/staging/unisys/visorchannel/visorchannel_funcs.c
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/visorchannel/visorchannel_funcs.c
@@ -0,0 +1,765 @@
+/* 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(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(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(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(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(visorchannel_destroy);
+
+HOSTADDRESS
+visorchannel_get_physaddr(VISORCHANNEL *channel)
+{
+ return memregion_get_physaddr(channel->memregion);
+}
+EXPORT_SYMBOL(visorchannel_get_physaddr);
+
+ulong
+visorchannel_get_nbytes(VISORCHANNEL *channel)
+{
+ return channel->size;
+}
+EXPORT_SYMBOL(visorchannel_get_nbytes);
+
+char *
+visorchannel_GUID_id(GUID *guid, char *s)
+{
+ return GUID_format1(guid, s);
+}
+EXPORT_SYMBOL(visorchannel_GUID_id);
+
+char *
+visorchannel_id(VISORCHANNEL *channel, char *s)
+{
+ return visorchannel_GUID_id(&channel->guid, s);
+}
+EXPORT_SYMBOL(visorchannel_id);
+
+char *
+visorchannel_zoneid(VISORCHANNEL *channel, char *s)
+{
+ return visorchannel_GUID_id(&channel->chan_hdr.ZoneGuid, s);
+}
+EXPORT_SYMBOL(visorchannel_zoneid);
+
+HOSTADDRESS
+visorchannel_get_clientpartition(VISORCHANNEL *channel)
+{
+ return channel->chan_hdr.PartitionHandle;
+}
+EXPORT_SYMBOL(visorchannel_get_clientpartition);
+
+GUID
+visorchannel_get_GUID(VISORCHANNEL *channel)
+{
+ return channel->guid;
+}
+EXPORT_SYMBOL(visorchannel_get_GUID);
+
+MEMREGION *
+visorchannel_get_memregion(VISORCHANNEL *channel)
+{
+ return channel->memregion;
+}
+EXPORT_SYMBOL(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(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(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(visorchannel_clear);
+
+void *
+visorchannel_get_header(VISORCHANNEL *channel)
+{
+ return (void *) &(channel->chan_hdr);
+}
+EXPORT_SYMBOL(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(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(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(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(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(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(visorchannel_dump_section);
Index: upstream-staging/drivers/staging/unisys/visorchannel/visorchannel_main.c
===================================================================
--- /dev/null
+++ upstream-staging/drivers/staging/unisys/visorchannel/visorchannel_main.c
@@ -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);
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