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Date: Tue, 17 May 2016 03:27:58 -0400
From: David Kershner <david.kershner@...sys.com>
To: <corbet@....net>, <tglx@...utronix.de>, <mingo@...hat.com>,
<hpa@...or.com>, <david.kershner@...sys.com>,
<gregkh@...uxfoundation.org>, <erik.arfvidson@...sys.com>,
<timothy.sell@...sys.com>, <hofrat@...dl.org>,
<dzickus@...hat.com>, <jes.sorensen@...hat.com>,
<alexander.curtin@...sys.com>, <janani.rvchndrn@...il.com>,
<sudipm.mukherjee@...il.com>, <prarit@...hat.com>,
<david.binder@...sys.com>, <nhorman@...hat.com>,
<dan.j.williams@...el.com>, <linux-kernel@...r.kernel.org>,
<linux-doc@...r.kernel.org>,
<driverdev-devel@...uxdriverproject.org>,
<sparmaintainer@...sys.com>
Subject: [PATCH 2/5] include: linux: visorbus: Add visorbus to include/linux directory
Update include/linux to include the s-Par associated common include
header files needed for the s-Par visorbus.
Signed-off-by: David Kershner <david.kershner@...sys.com>
---
include/linux/visorbus/channel.h | 572 +++++++++++++++++++++++++++++++
include/linux/visorbus/channel_guid.h | 55 +++
include/linux/visorbus/diagchannel.h | 38 ++
include/linux/visorbus/guestlinuxdebug.h | 180 ++++++++++
include/linux/visorbus/iochannel.h | 571 ++++++++++++++++++++++++++++++
include/linux/visorbus/periodic_work.h | 40 +++
include/linux/visorbus/vbushelper.h | 46 +++
include/linux/visorbus/version.h | 45 +++
include/linux/visorbus/visorbus.h | 234 +++++++++++++
9 files changed, 1781 insertions(+)
create mode 100644 include/linux/visorbus/channel.h
create mode 100644 include/linux/visorbus/channel_guid.h
create mode 100644 include/linux/visorbus/diagchannel.h
create mode 100644 include/linux/visorbus/guestlinuxdebug.h
create mode 100644 include/linux/visorbus/iochannel.h
create mode 100644 include/linux/visorbus/periodic_work.h
create mode 100644 include/linux/visorbus/vbushelper.h
create mode 100644 include/linux/visorbus/version.h
create mode 100644 include/linux/visorbus/visorbus.h
diff --git a/include/linux/visorbus/channel.h b/include/linux/visorbus/channel.h
new file mode 100644
index 0000000..db4e6b2
--- /dev/null
+++ b/include/linux/visorbus/channel.h
@@ -0,0 +1,572 @@
+/* Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+#ifndef __CHANNEL_H__
+#define __CHANNEL_H__
+
+#include <linux/types.h>
+#include <linux/io.h>
+#include <linux/uuid.h>
+
+/*
+* Whenever this file is changed a corresponding change must be made in
+* the Console/ServicePart/visordiag_early/supervisor_channel.h file
+* which is needed for Linux kernel compiles. These two files must be
+* in sync.
+*/
+
+/* define the following to prevent include nesting in kernel header
+ * files of similar abbreviated content
+ */
+#define __SUPERVISOR_CHANNEL_H__
+
+#define SIGNATURE_16(A, B) ((A) | (B << 8))
+#define SIGNATURE_32(A, B, C, D) \
+ (SIGNATURE_16(A, B) | (SIGNATURE_16(C, D) << 16))
+#define SIGNATURE_64(A, B, C, D, E, F, G, H) \
+ (SIGNATURE_32(A, B, C, D) | ((u64)(SIGNATURE_32(E, F, G, H)) << 32))
+
+#ifndef lengthof
+#define lengthof(TYPE, MEMBER) (sizeof(((TYPE *)0)->MEMBER))
+#endif
+#ifndef COVERQ
+#define COVERQ(v, d) (((v) + (d) - 1) / (d))
+#endif
+#ifndef COVER
+#define COVER(v, d) ((d) * COVERQ(v, d))
+#endif
+
+#define ULTRA_CHANNEL_PROTOCOL_SIGNATURE SIGNATURE_32('E', 'C', 'N', 'L')
+
+enum channel_serverstate {
+ CHANNELSRV_UNINITIALIZED = 0, /* channel is in an undefined state */
+ CHANNELSRV_READY = 1 /* channel has been initialized by server */
+};
+
+enum channel_clientstate {
+ CHANNELCLI_DETACHED = 0,
+ CHANNELCLI_DISABLED = 1, /* client can see channel but is NOT
+ * allowed to use it unless given TBD
+ * explicit request (should actually be
+ * < DETACHED)
+ */
+ CHANNELCLI_ATTACHING = 2, /* legacy EFI client request
+ * for EFI server to attach
+ */
+ CHANNELCLI_ATTACHED = 3, /* idle, but client may want
+ * to use channel any time
+ */
+ CHANNELCLI_BUSY = 4, /* client either wants to use or is
+ * using channel
+ */
+ CHANNELCLI_OWNED = 5 /* "no worries" state - client can */
+ /* access channel anytime */
+};
+
+static inline const u8 *
+ULTRA_CHANNELCLI_STRING(u32 state)
+{
+ switch (state) {
+ case CHANNELCLI_DETACHED:
+ return (const u8 *)("DETACHED");
+ case CHANNELCLI_DISABLED:
+ return (const u8 *)("DISABLED");
+ case CHANNELCLI_ATTACHING:
+ return (const u8 *)("ATTACHING");
+ case CHANNELCLI_ATTACHED:
+ return (const u8 *)("ATTACHED");
+ case CHANNELCLI_BUSY:
+ return (const u8 *)("BUSY");
+ case CHANNELCLI_OWNED:
+ return (const u8 *)("OWNED");
+ default:
+ break;
+ }
+ return (const u8 *)("?");
+}
+
+#define SPAR_CHANNEL_SERVER_READY(ch) \
+ (readl(&(ch)->srv_state) == CHANNELSRV_READY)
+
+#define ULTRA_VALID_CHANNELCLI_TRANSITION(o, n) \
+ (((((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_DISABLED)) || \
+ (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_DISABLED)) || \
+ (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_DISABLED)) || \
+ (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_DETACHED)) || \
+ (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_DETACHED)) || \
+ (((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_ATTACHING)) || \
+ (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_ATTACHED)) || \
+ (((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_ATTACHED)) || \
+ (((o) == CHANNELCLI_BUSY) && ((n) == CHANNELCLI_ATTACHED)) || \
+ (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_BUSY)) || \
+ (((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_OWNED)) || \
+ (((o) == CHANNELCLI_DISABLED) && ((n) == CHANNELCLI_OWNED)) || \
+ (((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_OWNED)) || \
+ (((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_OWNED)) || \
+ (((o) == CHANNELCLI_BUSY) && ((n) == CHANNELCLI_OWNED)) || (0)) \
+ ? (1) : (0))
+
+/* 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)
+
+/* Common Channel Header */
+struct channel_header {
+ u64 signature; /* Signature */
+ u32 legacy_state; /* DEPRECATED - being replaced by */
+ /* SrvState, CliStateBoot, and CliStateOS below */
+ u32 header_size; /* sizeof(struct channel_header) */
+ u64 size; /* Total size of this channel in bytes */
+ u64 features; /* Flags to modify behavior */
+ uuid_le chtype; /* Channel type: data, bus, control, etc. */
+ u64 partition_handle; /* ID of guest partition */
+ u64 handle; /* Device number of this channel in client */
+ u64 ch_space_offset; /* Offset in bytes to channel specific area */
+ u32 version_id; /* struct channel_header Version ID */
+ u32 partition_index; /* Index of guest partition */
+ uuid_le zone_uuid; /* Guid of Channel's zone */
+ u32 cli_str_offset; /* offset from channel header to
+ * nul-terminated ClientString (0 if
+ * ClientString not present)
+ */
+ u32 cli_state_boot; /* CHANNEL_CLIENTSTATE of pre-boot
+ * EFI client of this channel
+ */
+ u32 cmd_state_cli; /* CHANNEL_COMMANDSTATE (overloaded in
+ * Windows drivers, see ServerStateUp,
+ * ServerStateDown, etc)
+ */
+ u32 cli_state_os; /* CHANNEL_CLIENTSTATE of Guest OS
+ * client of this channel
+ */
+ u32 ch_characteristic; /* CHANNEL_CHARACTERISTIC_<xxx> */
+ u32 cmd_state_srv; /* CHANNEL_COMMANDSTATE (overloaded in
+ * Windows drivers, see ServerStateUp,
+ * ServerStateDown, etc)
+ */
+ u32 srv_state; /* CHANNEL_SERVERSTATE */
+ u8 cli_error_boot; /* bits to indicate err states for
+ * boot clients, so err messages can
+ * be throttled
+ */
+ u8 cli_error_os; /* bits to indicate err states for OS
+ * clients, so err messages can be
+ * throttled
+ */
+ u8 filler[1]; /* Pad out to 128 byte cacheline */
+ /* Please add all new single-byte values below here */
+ u8 recover_channel;
+} __packed;
+
+#define ULTRA_CHANNEL_ENABLE_INTS (0x1ULL << 0)
+
+/* Subheader for the Signal Type variation of the Common Channel */
+struct signal_queue_header {
+ /* 1st cache line */
+ u32 version; /* SIGNAL_QUEUE_HEADER Version ID */
+ u32 chtype; /* Queue type: storage, network */
+ u64 size; /* Total size of this queue in bytes */
+ u64 sig_base_offset; /* Offset to signal queue area */
+ u64 features; /* Flags to modify behavior */
+ u64 num_sent; /* Total # of signals placed in this queue */
+ u64 num_overflows; /* Total # of inserts failed due to
+ * full queue
+ */
+ u32 signal_size; /* Total size of a signal for this queue */
+ u32 max_slots; /* Max # of slots in queue, 1 slot is
+ * always empty
+ */
+ u32 max_signals; /* Max # of signals in queue
+ * (MaxSignalSlots-1)
+ */
+ u32 head; /* Queue head signal # */
+ /* 2nd cache line */
+ u64 num_received; /* Total # of signals removed from this queue */
+ u32 tail; /* Queue tail signal */
+ u32 reserved1; /* Reserved field */
+ u64 reserved2; /* Reserved field */
+ u64 client_queue;
+ u64 num_irq_received; /* Total # of Interrupts received. This
+ * is incremented by the ISR in the
+ * guest windows driver
+ */
+ u64 num_empty; /* Number of times that visor_signal_remove
+ * is called and returned Empty Status.
+ */
+ u32 errorflags; /* Error bits set during SignalReinit
+ * to denote trouble with client's
+ * fields
+ */
+ u8 filler[12]; /* Pad out to 64 byte cacheline */
+} __packed;
+
+#define spar_signal_init(chan, QHDRFLD, QDATAFLD, QDATATYPE, ver, typ) \
+ do { \
+ memset(&chan->QHDRFLD, 0, sizeof(chan->QHDRFLD)); \
+ chan->QHDRFLD.version = ver; \
+ chan->QHDRFLD.chtype = typ; \
+ chan->QHDRFLD.size = sizeof(chan->QDATAFLD); \
+ chan->QHDRFLD.signal_size = sizeof(QDATATYPE); \
+ chan->QHDRFLD.sig_base_offset = (u64)(chan->QDATAFLD) - \
+ (u64)(&chan->QHDRFLD); \
+ chan->QHDRFLD.max_slots = \
+ sizeof(chan->QDATAFLD) / sizeof(QDATATYPE); \
+ chan->QHDRFLD.max_signals = chan->QHDRFLD.max_slots - 1;\
+ } while (0)
+
+/* Generic function useful for validating any type of channel when it is
+ * received by the client that will be accessing the channel.
+ * Note that <logCtx> is only needed for callers in the EFI environment, and
+ * is used to pass the EFI_DIAG_CAPTURE_PROTOCOL needed to log messages.
+ */
+static inline int
+spar_check_channel_client(void __iomem *ch,
+ uuid_le expected_uuid,
+ char *chname,
+ u64 expected_min_bytes,
+ u32 expected_version,
+ u64 expected_signature)
+{
+ if (uuid_le_cmp(expected_uuid, NULL_UUID_LE) != 0) {
+ uuid_le guid;
+
+ memcpy_fromio(&guid,
+ &((struct channel_header __iomem *)(ch))->chtype,
+ sizeof(guid));
+ /* caller wants us to verify type GUID */
+ if (uuid_le_cmp(guid, expected_uuid) != 0) {
+ pr_err("Channel mismatch on channel=%s(%pUL) field=type expected=%pUL actual=%pUL\n",
+ chname, &expected_uuid,
+ &expected_uuid, &guid);
+ return 0;
+ }
+ }
+ if (expected_min_bytes > 0) { /* verify channel size */
+ unsigned long long bytes =
+ readq(&((struct channel_header __iomem *)
+ (ch))->size);
+ if (bytes < expected_min_bytes) {
+ pr_err("Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8Lx actual=0x%-8.8Lx\n",
+ chname, &expected_uuid,
+ (unsigned long long)expected_min_bytes, bytes);
+ return 0;
+ }
+ }
+ if (expected_version > 0) { /* verify channel version */
+ unsigned long ver = readl(&((struct channel_header __iomem *)
+ (ch))->version_id);
+ if (ver != expected_version) {
+ pr_err("Channel mismatch on channel=%s(%pUL) field=version expected=0x%-8.8lx actual=0x%-8.8lx\n",
+ chname, &expected_uuid,
+ (unsigned long)expected_version, ver);
+ return 0;
+ }
+ }
+ if (expected_signature > 0) { /* verify channel signature */
+ unsigned long long sig =
+ readq(&((struct channel_header __iomem *)
+ (ch))->signature);
+ if (sig != expected_signature) {
+ pr_err("Channel mismatch on channel=%s(%pUL) field=signature expected=0x%-8.8llx actual=0x%-8.8llx\n",
+ chname, &expected_uuid,
+ expected_signature, sig);
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/* Generic function useful for validating any type of channel when it is about
+ * to be initialized by the server of the channel.
+ * Note that <logCtx> is only needed for callers in the EFI environment, and
+ * is used to pass the EFI_DIAG_CAPTURE_PROTOCOL needed to log messages.
+ */
+static inline int spar_check_channel_server(uuid_le typeuuid, char *name,
+ u64 expected_min_bytes,
+ u64 actual_bytes)
+{
+ if (expected_min_bytes > 0) /* verify channel size */
+ if (actual_bytes < expected_min_bytes) {
+ pr_err("Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8llx actual=0x%-8.8llx\n",
+ name, &typeuuid, expected_min_bytes,
+ actual_bytes);
+ return 0;
+ }
+ return 1;
+}
+
+/* Given a file pathname <s> (with '/' or '\' separating directory nodes),
+ * returns a pointer to the beginning of a node within that pathname such
+ * that the number of nodes from that pointer to the end of the string is
+ * NOT more than <n>. Note that if the pathname has less than <n> nodes
+ * in it, the return pointer will be to the beginning of the string.
+ */
+static inline u8 *
+pathname_last_n_nodes(u8 *s, unsigned int n)
+{
+ u8 *p = s;
+ unsigned int node_count = 0;
+
+ while (*p != '\0') {
+ if ((*p == '/') || (*p == '\\'))
+ node_count++;
+ p++;
+ }
+ if (node_count <= n)
+ return s;
+ while (n > 0) {
+ p--;
+ if (p == s)
+ break; /* should never happen, unless someone
+ * is changing the string while we are
+ * looking at it!!
+ */
+ if ((*p == '/') || (*p == '\\'))
+ n--;
+ }
+ return p + 1;
+}
+
+static inline int
+spar_channel_client_acquire_os(void __iomem *ch, u8 *id)
+{
+ struct channel_header __iomem *hdr = ch;
+
+ if (readl(&hdr->cli_state_os) == CHANNELCLI_DISABLED) {
+ if ((readb(&hdr->cli_error_os)
+ & ULTRA_CLIERROROS_THROTTLEMSG_DISABLED) == 0) {
+ /* we are NOT throttling this message */
+ writeb(readb(&hdr->cli_error_os) |
+ ULTRA_CLIERROROS_THROTTLEMSG_DISABLED,
+ &hdr->cli_error_os);
+ /* throttle until acquire successful */
+
+ pr_info("%s Channel StateTransition INVALID! - acquire failed because OS client DISABLED\n",
+ id);
+ }
+ return 0;
+ }
+ if ((readl(&hdr->cli_state_os) != CHANNELCLI_OWNED) &&
+ (readl(&hdr->cli_state_boot) == CHANNELCLI_DISABLED)) {
+ /* Our competitor is DISABLED, so we can transition to OWNED */
+ pr_info("%s Channel StateTransition (%s) %s(%d)-->%s(%d)\n",
+ id, "cli_state_os",
+ ULTRA_CHANNELCLI_STRING(readl(&hdr->cli_state_os)),
+ readl(&hdr->cli_state_os),
+ ULTRA_CHANNELCLI_STRING(CHANNELCLI_OWNED),
+ CHANNELCLI_OWNED);
+ writel(CHANNELCLI_OWNED, &hdr->cli_state_os);
+ mb(); /* required for channel synch */
+ }
+ if (readl(&hdr->cli_state_os) == CHANNELCLI_OWNED) {
+ if (readb(&hdr->cli_error_os)) {
+ /* we are in an error msg throttling state;
+ * come out of it
+ */
+ pr_info("%s Channel OS client acquire now successful\n",
+ id);
+ writeb(0, &hdr->cli_error_os);
+ }
+ return 1;
+ }
+
+ /* We have to do it the "hard way". We transition to BUSY,
+ * and can use the channel iff our competitor has not also
+ * transitioned to BUSY.
+ */
+ if (readl(&hdr->cli_state_os) != CHANNELCLI_ATTACHED) {
+ if ((readb(&hdr->cli_error_os)
+ & ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED) == 0) {
+ /* we are NOT throttling this message */
+ writeb(readb(&hdr->cli_error_os) |
+ ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED,
+ &hdr->cli_error_os);
+ /* throttle until acquire successful */
+ pr_info("%s Channel StateTransition INVALID! - acquire failed because OS client NOT ATTACHED (state=%s(%d))\n",
+ id, ULTRA_CHANNELCLI_STRING(
+ readl(&hdr->cli_state_os)),
+ readl(&hdr->cli_state_os));
+ }
+ return 0;
+ }
+ writel(CHANNELCLI_BUSY, &hdr->cli_state_os);
+ mb(); /* required for channel synch */
+ if (readl(&hdr->cli_state_boot) == CHANNELCLI_BUSY) {
+ if ((readb(&hdr->cli_error_os)
+ & ULTRA_CLIERROROS_THROTTLEMSG_BUSY) == 0) {
+ /* we are NOT throttling this message */
+ writeb(readb(&hdr->cli_error_os) |
+ ULTRA_CLIERROROS_THROTTLEMSG_BUSY,
+ &hdr->cli_error_os);
+ /* throttle until acquire successful */
+ pr_info("%s Channel StateTransition failed - host OS acquire failed because boot BUSY\n",
+ id);
+ }
+ /* reset busy */
+ writel(CHANNELCLI_ATTACHED, &hdr->cli_state_os);
+ mb(); /* required for channel synch */
+ return 0;
+ }
+ if (readb(&hdr->cli_error_os)) {
+ /* we are in an error msg throttling state; come out of it */
+ pr_info("%s Channel OS client acquire now successful\n", id);
+ writeb(0, &hdr->cli_error_os);
+ }
+ return 1;
+}
+
+static inline void
+spar_channel_client_release_os(void __iomem *ch, u8 *id)
+{
+ struct channel_header __iomem *hdr = ch;
+
+ if (readb(&hdr->cli_error_os)) {
+ /* we are in an error msg throttling state; come out of it */
+ pr_info("%s Channel OS client error state cleared\n", id);
+ writeb(0, &hdr->cli_error_os);
+ }
+ if (readl(&hdr->cli_state_os) == CHANNELCLI_OWNED)
+ return;
+ if (readl(&hdr->cli_state_os) != CHANNELCLI_BUSY) {
+ pr_info("%s Channel StateTransition INVALID! - release failed because OS client NOT BUSY (state=%s(%d))\n",
+ id, ULTRA_CHANNELCLI_STRING(
+ readl(&hdr->cli_state_os)),
+ readl(&hdr->cli_state_os));
+ /* return; */
+ }
+ writel(CHANNELCLI_ATTACHED, &hdr->cli_state_os); /* release busy */
+}
+
+/*
+* Routine Description:
+* Tries to insert the prebuilt signal pointed to by pSignal into the nth
+* Queue of the Channel pointed to by pChannel
+*
+* Parameters:
+* pChannel: (IN) points to the IO Channel
+* Queue: (IN) nth Queue of the IO Channel
+* pSignal: (IN) pointer to the signal
+*
+* Assumptions:
+* - pChannel, Queue and pSignal are valid.
+* - If insertion fails due to a full queue, the caller will determine the
+* retry policy (e.g. wait & try again, report an error, etc.).
+*
+* Return value: 1 if the insertion succeeds, 0 if the queue was
+* full.
+*/
+
+unsigned char spar_signal_insert(struct channel_header __iomem *ch, u32 queue,
+ void *sig);
+
+/*
+* Routine Description:
+* Removes one signal from Channel pChannel's nth Queue at the
+* time of the call and copies it into the memory pointed to by
+* pSignal.
+*
+* Parameters:
+* pChannel: (IN) points to the IO Channel
+* Queue: (IN) nth Queue of the IO Channel
+* pSignal: (IN) pointer to where the signals are to be copied
+*
+* Assumptions:
+* - pChannel and Queue are valid.
+* - pSignal points to a memory area large enough to hold queue's SignalSize
+*
+* Return value: 1 if the removal succeeds, 0 if the queue was
+* empty.
+*/
+
+unsigned char spar_signal_remove(struct channel_header __iomem *ch, u32 queue,
+ void *sig);
+
+/*
+* Routine Description:
+* Removes all signals present in Channel pChannel's nth Queue at the
+* time of the call and copies them into the memory pointed to by
+* pSignal. Returns the # of signals copied as the value of the routine.
+*
+* Parameters:
+* pChannel: (IN) points to the IO Channel
+* Queue: (IN) nth Queue of the IO Channel
+* pSignal: (IN) pointer to where the signals are to be copied
+*
+* Assumptions:
+* - pChannel and Queue are valid.
+* - pSignal points to a memory area large enough to hold Queue's MaxSignals
+* # of signals, each of which is Queue's SignalSize.
+*
+* Return value:
+* # of signals copied.
+*/
+unsigned int spar_signal_remove_all(struct channel_header *ch, u32 queue,
+ void *sig);
+
+/*
+* Routine Description:
+* Determine whether a signal queue is empty.
+*
+* Parameters:
+* pChannel: (IN) points to the IO Channel
+* Queue: (IN) nth Queue of the IO Channel
+*
+* Return value:
+* 1 if the signal queue is empty, 0 otherwise.
+*/
+unsigned char spar_signalqueue_empty(struct channel_header __iomem *ch,
+ u32 queue);
+
+#endif
diff --git a/include/linux/visorbus/channel_guid.h b/include/linux/visorbus/channel_guid.h
new file mode 100644
index 0000000..17cb499
--- /dev/null
+++ b/include/linux/visorbus/channel_guid.h
@@ -0,0 +1,55 @@
+/* Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+/*
+ * CHANNEL Guids
+ */
+
+/* {414815ed-c58c-11da-95a9-00e08161165f} */
+#define SPAR_VHBA_CHANNEL_PROTOCOL_UUID \
+ UUID_LE(0x414815ed, 0xc58c, 0x11da, \
+ 0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
+static const uuid_le spar_vhba_channel_protocol_uuid =
+ SPAR_VHBA_CHANNEL_PROTOCOL_UUID;
+#define SPAR_VHBA_CHANNEL_PROTOCOL_UUID_STR \
+ "414815ed-c58c-11da-95a9-00e08161165f"
+
+/* {8cd5994d-c58e-11da-95a9-00e08161165f} */
+#define SPAR_VNIC_CHANNEL_PROTOCOL_UUID \
+ UUID_LE(0x8cd5994d, 0xc58e, 0x11da, \
+ 0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
+static const uuid_le spar_vnic_channel_protocol_uuid =
+ SPAR_VNIC_CHANNEL_PROTOCOL_UUID;
+#define SPAR_VNIC_CHANNEL_PROTOCOL_UUID_STR \
+ "8cd5994d-c58e-11da-95a9-00e08161165f"
+
+/* {72120008-4AAB-11DC-8530-444553544200} */
+#define SPAR_SIOVM_UUID \
+ UUID_LE(0x72120008, 0x4AAB, 0x11DC, \
+ 0x85, 0x30, 0x44, 0x45, 0x53, 0x54, 0x42, 0x00)
+static const uuid_le spar_siovm_uuid = SPAR_SIOVM_UUID;
+
+/* {5b52c5ac-e5f5-4d42-8dff-429eaecd221f} */
+#define SPAR_CONTROLDIRECTOR_CHANNEL_PROTOCOL_UUID \
+ UUID_LE(0x5b52c5ac, 0xe5f5, 0x4d42, \
+ 0x8d, 0xff, 0x42, 0x9e, 0xae, 0xcd, 0x22, 0x1f)
+
+static const uuid_le spar_controldirector_channel_protocol_uuid =
+ SPAR_CONTROLDIRECTOR_CHANNEL_PROTOCOL_UUID;
+
+/* {b4e79625-aede-4eAA-9e11-D3eddcd4504c} */
+#define SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID \
+ UUID_LE(0xb4e79625, 0xaede, 0x4eaa, \
+ 0x9e, 0x11, 0xd3, 0xed, 0xdc, 0xd4, 0x50, 0x4c)
diff --git a/include/linux/visorbus/diagchannel.h b/include/linux/visorbus/diagchannel.h
new file mode 100644
index 0000000..6e813c7
--- /dev/null
+++ b/include/linux/visorbus/diagchannel.h
@@ -0,0 +1,38 @@
+/* Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+#ifndef _DIAG_CHANNEL_H_
+#define _DIAG_CHANNEL_H_
+
+/* Levels of severity for diagnostic events, in order from lowest severity to
+ * highest (i.e. fatal errors are the most severe, and should always be logged,
+ * but info events rarely need to be logged except during debugging). The
+ * values DIAG_SEVERITY_ENUM_BEGIN and DIAG_SEVERITY_ENUM_END are not valid
+ * severity values. They exist merely to dilineate the list, so that future
+ * additions won't require changes to the driver (i.e. when checking for
+ * out-of-range severities in SetSeverity). The values DIAG_SEVERITY_OVERRIDE
+ * and DIAG_SEVERITY_SHUTOFF are not valid severity values for logging events
+ * but they are valid for controlling the amount of event data. Changes made
+ * to the enum, need to be reflected in s-Par.
+ */
+enum diag_severity {
+ DIAG_SEVERITY_VERBOSE = 0,
+ DIAG_SEVERITY_INFO = 1,
+ DIAG_SEVERITY_WARNING = 2,
+ DIAG_SEVERITY_ERR = 3,
+ DIAG_SEVERITY_PRINT = 4,
+};
+
+#endif
diff --git a/include/linux/visorbus/guestlinuxdebug.h b/include/linux/visorbus/guestlinuxdebug.h
new file mode 100644
index 0000000..b81287f
--- /dev/null
+++ b/include/linux/visorbus/guestlinuxdebug.h
@@ -0,0 +1,180 @@
+/* Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+#ifndef __GUESTLINUXDEBUG_H__
+#define __GUESTLINUXDEBUG_H__
+
+/*
+ * This file contains supporting interface for "vmcallinterface.h", particularly
+ * regarding adding additional structure and functionality to linux
+ * ISSUE_IO_VMCALL_POSTCODE_SEVERITY
+ */
+
+/******* INFO ON ISSUE_POSTCODE_LINUX() BELOW *******/
+enum driver_pc { /* POSTCODE driver identifier tuples */
+ /* visorchipset driver files */
+ VISOR_CHIPSET_PC = 0xA0,
+ VISOR_CHIPSET_PC_controlvm_c = 0xA1,
+ VISOR_CHIPSET_PC_controlvm_cm2 = 0xA2,
+ VISOR_CHIPSET_PC_controlvm_direct_c = 0xA3,
+ VISOR_CHIPSET_PC_file_c = 0xA4,
+ VISOR_CHIPSET_PC_parser_c = 0xA5,
+ VISOR_CHIPSET_PC_testing_c = 0xA6,
+ VISOR_CHIPSET_PC_visorchipset_main_c = 0xA7,
+ VISOR_CHIPSET_PC_visorswitchbus_c = 0xA8,
+ /* visorbus driver files */
+ VISOR_BUS_PC = 0xB0,
+ VISOR_BUS_PC_businst_attr_c = 0xB1,
+ VISOR_BUS_PC_channel_attr_c = 0xB2,
+ VISOR_BUS_PC_devmajorminor_attr_c = 0xB3,
+ VISOR_BUS_PC_visorbus_main_c = 0xB4,
+ /* visorclientbus driver files */
+ VISOR_CLIENT_BUS_PC = 0xC0,
+ VISOR_CLIENT_BUS_PC_visorclientbus_main_c = 0xC1,
+ /* virt hba driver files */
+ VIRT_HBA_PC = 0xC2,
+ VIRT_HBA_PC_virthba_c = 0xC3,
+ /* virtpci driver files */
+ VIRT_PCI_PC = 0xC4,
+ VIRT_PCI_PC_virtpci_c = 0xC5,
+ /* virtnic driver files */
+ VIRT_NIC_PC = 0xC6,
+ VIRT_NIC_P_virtnic_c = 0xC7,
+ /* uislib driver files */
+ UISLIB_PC = 0xD0,
+ UISLIB_PC_uislib_c = 0xD1,
+ UISLIB_PC_uisqueue_c = 0xD2,
+ UISLIB_PC_uisthread_c = 0xD3,
+ UISLIB_PC_uisutils_c = 0xD4,
+};
+
+enum event_pc { /* POSTCODE event identifier tuples */
+ ATTACH_PORT_ENTRY_PC = 0x001,
+ ATTACH_PORT_FAILURE_PC = 0x002,
+ ATTACH_PORT_SUCCESS_PC = 0x003,
+ BUS_FAILURE_PC = 0x004,
+ BUS_CREATE_ENTRY_PC = 0x005,
+ BUS_CREATE_FAILURE_PC = 0x006,
+ BUS_CREATE_EXIT_PC = 0x007,
+ BUS_CONFIGURE_ENTRY_PC = 0x008,
+ BUS_CONFIGURE_FAILURE_PC = 0x009,
+ BUS_CONFIGURE_EXIT_PC = 0x00A,
+ CHIPSET_INIT_ENTRY_PC = 0x00B,
+ CHIPSET_INIT_SUCCESS_PC = 0x00C,
+ CHIPSET_INIT_FAILURE_PC = 0x00D,
+ CHIPSET_INIT_EXIT_PC = 0x00E,
+ CREATE_WORKQUEUE_PC = 0x00F,
+ CREATE_WORKQUEUE_FAILED_PC = 0x0A0,
+ CONTROLVM_INIT_FAILURE_PC = 0x0A1,
+ DEVICE_CREATE_ENTRY_PC = 0x0A2,
+ DEVICE_CREATE_FAILURE_PC = 0x0A3,
+ DEVICE_CREATE_SUCCESS_PC = 0x0A4,
+ DEVICE_CREATE_EXIT_PC = 0x0A5,
+ DEVICE_ADD_PC = 0x0A6,
+ DEVICE_REGISTER_FAILURE_PC = 0x0A7,
+ DEVICE_CHANGESTATE_ENTRY_PC = 0x0A8,
+ DEVICE_CHANGESTATE_FAILURE_PC = 0x0A9,
+ DEVICE_CHANGESTATE_EXIT_PC = 0x0AA,
+ DRIVER_ENTRY_PC = 0x0AB,
+ DRIVER_EXIT_PC = 0x0AC,
+ MALLOC_FAILURE_PC = 0x0AD,
+ QUEUE_DELAYED_WORK_PC = 0x0AE,
+ UISLIB_THREAD_FAILURE_PC = 0x0B7,
+ VBUS_CHANNEL_ENTRY_PC = 0x0B8,
+ VBUS_CHANNEL_FAILURE_PC = 0x0B9,
+ VBUS_CHANNEL_EXIT_PC = 0x0BA,
+ VHBA_CREATE_ENTRY_PC = 0x0BB,
+ VHBA_CREATE_FAILURE_PC = 0x0BC,
+ VHBA_CREATE_EXIT_PC = 0x0BD,
+ VHBA_CREATE_SUCCESS_PC = 0x0BE,
+ VHBA_COMMAND_HANDLER_PC = 0x0BF,
+ VHBA_PROBE_ENTRY_PC = 0x0C0,
+ VHBA_PROBE_FAILURE_PC = 0x0C1,
+ VHBA_PROBE_EXIT_PC = 0x0C2,
+ VNIC_CREATE_ENTRY_PC = 0x0C3,
+ VNIC_CREATE_FAILURE_PC = 0x0C4,
+ VNIC_CREATE_SUCCESS_PC = 0x0C5,
+ VNIC_PROBE_ENTRY_PC = 0x0C6,
+ VNIC_PROBE_FAILURE_PC = 0x0C7,
+ VNIC_PROBE_EXIT_PC = 0x0C8,
+ VPCI_CREATE_ENTRY_PC = 0x0C9,
+ VPCI_CREATE_FAILURE_PC = 0x0CA,
+ VPCI_CREATE_EXIT_PC = 0x0CB,
+ VPCI_PROBE_ENTRY_PC = 0x0CC,
+ VPCI_PROBE_FAILURE_PC = 0x0CD,
+ VPCI_PROBE_EXIT_PC = 0x0CE,
+ CRASH_DEV_ENTRY_PC = 0x0CF,
+ CRASH_DEV_EXIT_PC = 0x0D0,
+ CRASH_DEV_HADDR_NULL = 0x0D1,
+ CRASH_DEV_CONTROLVM_NULL = 0x0D2,
+ CRASH_DEV_RD_BUS_FAIULRE_PC = 0x0D3,
+ CRASH_DEV_RD_DEV_FAIULRE_PC = 0x0D4,
+ CRASH_DEV_BUS_NULL_FAILURE_PC = 0x0D5,
+ CRASH_DEV_DEV_NULL_FAILURE_PC = 0x0D6,
+ CRASH_DEV_CTRL_RD_FAILURE_PC = 0x0D7,
+ CRASH_DEV_COUNT_FAILURE_PC = 0x0D8,
+ SAVE_MSG_BUS_FAILURE_PC = 0x0D9,
+ SAVE_MSG_DEV_FAILURE_PC = 0x0DA,
+ CALLHOME_INIT_FAILURE_PC = 0x0DB
+};
+
+#ifdef __GNUC__
+
+#define POSTCODE_SEVERITY_ERR DIAG_SEVERITY_ERR
+#define POSTCODE_SEVERITY_WARNING DIAG_SEVERITY_WARNING
+/* TODO-> Info currently doesn't show, so we set info=warning */
+#define POSTCODE_SEVERITY_INFO DIAG_SEVERITY_PRINT
+
+/* example call of POSTCODE_LINUX_2(VISOR_CHIPSET_PC, POSTCODE_SEVERITY_ERR);
+ * Please also note that the resulting postcode is in hex, so if you are
+ * searching for the __LINE__ number, convert it first to decimal. The line
+ * number combined with driver and type of call, will allow you to track down
+ * exactly what line an error occurred on, or where the last driver
+ * entered/exited from.
+ */
+
+/* BASE FUNCTIONS */
+#define POSTCODE_LINUX_A(DRIVER_PC, EVENT_PC, pc32bit, severity) \
+do { \
+ unsigned long long post_code_temp; \
+ post_code_temp = (((u64)DRIVER_PC) << 56) | (((u64)EVENT_PC) << 44) | \
+ ((((u64)__LINE__) & 0xFFF) << 32) | \
+ (((u64)pc32bit) & 0xFFFFFFFF); \
+ ISSUE_IO_VMCALL_POSTCODE_SEVERITY(post_code_temp, severity); \
+} while (0)
+
+#define POSTCODE_LINUX_B(DRIVER_PC, EVENT_PC, pc16bit1, pc16bit2, severity) \
+do { \
+ unsigned long long post_code_temp; \
+ post_code_temp = (((u64)DRIVER_PC) << 56) | (((u64)EVENT_PC) << 44) | \
+ ((((u64)__LINE__) & 0xFFF) << 32) | \
+ ((((u64)pc16bit1) & 0xFFFF) << 16) | \
+ (((u64)pc16bit2) & 0xFFFF); \
+ ISSUE_IO_VMCALL_POSTCODE_SEVERITY(post_code_temp, severity); \
+} while (0)
+
+/* MOST COMMON */
+#define POSTCODE_LINUX_2(EVENT_PC, severity) \
+ POSTCODE_LINUX_A(CURRENT_FILE_PC, EVENT_PC, 0x0000, severity)
+
+#define POSTCODE_LINUX_3(EVENT_PC, pc32bit, severity) \
+ POSTCODE_LINUX_A(CURRENT_FILE_PC, EVENT_PC, pc32bit, severity)
+
+#define POSTCODE_LINUX_4(EVENT_PC, pc16bit1, pc16bit2, severity) \
+ POSTCODE_LINUX_B(CURRENT_FILE_PC, EVENT_PC, pc16bit1, \
+ pc16bit2, severity)
+
+#endif
+#endif
diff --git a/include/linux/visorbus/iochannel.h b/include/linux/visorbus/iochannel.h
new file mode 100644
index 0000000..5ccf814
--- /dev/null
+++ b/include/linux/visorbus/iochannel.h
@@ -0,0 +1,571 @@
+/* Copyright (C) 2010 - 2013 UNISYS CORPORATION */
+/* All rights reserved. */
+#ifndef __IOCHANNEL_H__
+#define __IOCHANNEL_H__
+
+/*
+ * Everything needed for IOPart-GuestPart communication is define in
+ * this file. Note: Everything is OS-independent because this file is
+ * used by Windows, Linux and possible EFI drivers.
+ */
+
+/*
+ * Communication flow between the IOPart and GuestPart uses the channel headers
+ * channel state. The following states are currently being used:
+ * UNINIT(All Zeroes), CHANNEL_ATTACHING, CHANNEL_ATTACHED, CHANNEL_OPENED
+ *
+ * additional states will be used later. No locking is needed to switch between
+ * states due to the following rules:
+ *
+ * 1. IOPart is only the only partition allowed to change from UNIT
+ * 2. IOPart is only the only partition allowed to change from
+ * CHANNEL_ATTACHING
+ * 3. GuestPart is only the only partition allowed to change from
+ * CHANNEL_ATTACHED
+ *
+ * The state changes are the following: IOPart sees the channel is in UNINIT,
+ * UNINIT -> CHANNEL_ATTACHING (performed only by IOPart)
+ * CHANNEL_ATTACHING -> CHANNEL_ATTACHED (performed only by IOPart)
+ * CHANNEL_ATTACHED -> CHANNEL_OPENED (performed only by GuestPart)
+ */
+
+#include <linux/uuid.h>
+
+#include <linux/dma-direction.h>
+#include "channel.h"
+#include "channel_guid.h"
+
+#define ULTRA_VHBA_CHANNEL_PROTOCOL_SIGNATURE ULTRA_CHANNEL_PROTOCOL_SIGNATURE
+#define ULTRA_VNIC_CHANNEL_PROTOCOL_SIGNATURE ULTRA_CHANNEL_PROTOCOL_SIGNATURE
+#define ULTRA_VSWITCH_CHANNEL_PROTOCOL_SIGNATURE \
+ ULTRA_CHANNEL_PROTOCOL_SIGNATURE
+
+/* Must increment these whenever you insert or delete fields within this channel
+ * struct. Also increment whenever you change the meaning of fields within this
+ * channel struct so as to break pre-existing software. Note that you can
+ * usually add fields to the END of the channel struct withOUT needing to
+ * increment this.
+ */
+#define ULTRA_VHBA_CHANNEL_PROTOCOL_VERSIONID 2
+#define ULTRA_VNIC_CHANNEL_PROTOCOL_VERSIONID 2
+#define ULTRA_VSWITCH_CHANNEL_PROTOCOL_VERSIONID 1
+
+#define SPAR_VHBA_CHANNEL_OK_CLIENT(ch) \
+ (spar_check_channel_client(ch, spar_vhba_channel_protocol_uuid, \
+ "vhba", MIN_IO_CHANNEL_SIZE, \
+ ULTRA_VHBA_CHANNEL_PROTOCOL_VERSIONID, \
+ ULTRA_VHBA_CHANNEL_PROTOCOL_SIGNATURE))
+
+#define SPAR_VNIC_CHANNEL_OK_CLIENT(ch) \
+ (spar_check_channel_client(ch, spar_vnic_channel_protocol_uuid, \
+ "vnic", MIN_IO_CHANNEL_SIZE, \
+ ULTRA_VNIC_CHANNEL_PROTOCOL_VERSIONID, \
+ ULTRA_VNIC_CHANNEL_PROTOCOL_SIGNATURE))
+
+/*
+ * Everything necessary to handle SCSI & NIC traffic between Guest Partition and
+ * IO Partition is defined below.
+ */
+
+/* Defines and enums. */
+#define MINNUM(a, b) (((a) < (b)) ? (a) : (b))
+#define MAXNUM(a, b) (((a) > (b)) ? (a) : (b))
+
+/* define the two queues per data channel between iopart and ioguestparts */
+/* used by ioguestpart to 'insert' signals to iopart */
+#define IOCHAN_TO_IOPART 0
+/* used by ioguestpart to 'remove' signals from iopart, same previous queue */
+#define IOCHAN_FROM_IOPART 1
+
+/* size of cdb - i.e., scsi cmnd */
+#define MAX_CMND_SIZE 16
+
+#define MAX_SENSE_SIZE 64
+
+#define MAX_PHYS_INFO 64
+
+/* various types of network packets that can be sent in cmdrsp */
+enum net_types {
+ NET_RCV_POST = 0, /* submit buffer to hold receiving
+ * incoming packet
+ */
+ /* virtnic -> uisnic */
+ NET_RCV, /* incoming packet received */
+ /* uisnic -> virtpci */
+ NET_XMIT, /* for outgoing net packets */
+ /* virtnic -> uisnic */
+ NET_XMIT_DONE, /* outgoing packet xmitted */
+ /* uisnic -> virtpci */
+ NET_RCV_ENBDIS, /* enable/disable packet reception */
+ /* virtnic -> uisnic */
+ NET_RCV_ENBDIS_ACK, /* acknowledge enable/disable packet */
+ /* reception */
+ /* uisnic -> virtnic */
+ NET_RCV_PROMISC, /* enable/disable promiscuous mode */
+ /* virtnic -> uisnic */
+ NET_CONNECT_STATUS, /* indicate the loss or restoration of a network
+ * connection
+ */
+ /* uisnic -> virtnic */
+ NET_MACADDR, /* indicates the client has requested to update
+ * its MAC addr
+ */
+ NET_MACADDR_ACK, /* MAC address */
+
+};
+
+#define ETH_HEADER_SIZE 14 /* size of ethernet header */
+
+#define ETH_MIN_DATA_SIZE 46 /* minimum eth data size */
+#define ETH_MIN_PACKET_SIZE (ETH_HEADER_SIZE + ETH_MIN_DATA_SIZE)
+
+#define ETH_MAX_MTU 16384 /* maximum data size */
+
+#ifndef MAX_MACADDR_LEN
+#define MAX_MACADDR_LEN 6 /* number of bytes in MAC address */
+#endif /* MAX_MACADDR_LEN */
+
+/* various types of scsi task mgmt commands */
+enum task_mgmt_types {
+ TASK_MGMT_ABORT_TASK = 1,
+ TASK_MGMT_BUS_RESET,
+ TASK_MGMT_LUN_RESET,
+ TASK_MGMT_TARGET_RESET,
+};
+
+/* various types of vdisk mgmt commands */
+enum vdisk_mgmt_types {
+ VDISK_MGMT_ACQUIRE = 1,
+ VDISK_MGMT_RELEASE,
+};
+
+struct phys_info {
+ u64 pi_pfn;
+ u16 pi_off;
+ u16 pi_len;
+} __packed;
+
+#define MIN_NUMSIGNALS 64
+
+/* structs with pragma pack */
+
+struct guest_phys_info {
+ u64 address;
+ u64 length;
+} __packed;
+
+#define GPI_ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(struct guest_phys_info))
+
+struct uisscsi_dest {
+ u32 channel; /* channel == bus number */
+ u32 id; /* id == target number */
+ u32 lun; /* lun == logical unit number */
+} __packed;
+
+struct vhba_wwnn {
+ u32 wwnn1;
+ u32 wwnn2;
+} __packed;
+
+/* WARNING: Values stired in this structure must contain maximum counts (not
+ * maximum values).
+ */
+struct vhba_config_max {/* 20 bytes */
+ u32 max_channel;/* maximum channel for devices attached to this bus */
+ u32 max_id; /* maximum SCSI ID for devices attached to bus */
+ u32 max_lun; /* maximum SCSI LUN for devices attached to bus */
+ u32 cmd_per_lun;/* maximum number of outstanding commands per LUN */
+ u32 max_io_size;/* maximum io size for devices attached to this bus */
+ /* max io size is often determined by the resource of the hba. e.g */
+ /* max scatter gather list length * page size / sector size */
+} __packed;
+
+struct uiscmdrsp_scsi {
+ u64 handle; /* the handle to the cmd that was received */
+ /* send it back as is in the rsp packet. */
+ u8 cmnd[MAX_CMND_SIZE]; /* the cdb for the command */
+ u32 bufflen; /* length of data to be transferred out or in */
+ u16 guest_phys_entries; /* Number of entries in scatter-gather list */
+ struct guest_phys_info gpi_list[MAX_PHYS_INFO]; /* physical address
+ * information for each
+ * fragment
+ */
+ enum dma_data_direction data_dir; /* direction of the data, if any */
+ struct uisscsi_dest vdest; /* identifies the virtual hba, id, */
+ /* channel, lun to which cmd was sent */
+
+ /* Needed to queue the rsp back to cmd originator */
+ int linuxstat; /* original Linux status used by linux vdisk */
+ u8 scsistat; /* the scsi status */
+ u8 addlstat; /* non-scsi status */
+#define ADDL_SEL_TIMEOUT 4
+
+ /* the following fields are need to determine the result of command */
+ u8 sensebuf[MAX_SENSE_SIZE]; /* sense info in case cmd failed; */
+ /* it holds the sense_data struct; */
+ /* see that struct for details. */
+ void *vdisk; /* pointer to the vdisk to clean up when IO completes. */
+ int no_disk_result;
+ /* used to return no disk inquiry result
+ * when no_disk_result is set to 1,
+ * scsi.scsistat is SAM_STAT_GOOD
+ * scsi.addlstat is 0
+ * scsi.linuxstat is SAM_STAT_GOOD
+ * That is, there is NO error.
+ */
+} __packed;
+
+/* Defines to support sending correct inquiry result when no disk is
+ * configured.
+ */
+
+/* From SCSI SPC2 -
+ *
+ * If the target is not capable of supporting a device on this logical unit, the
+ * device server shall set this field to 7Fh (PERIPHERAL QUALIFIER set to 011b
+ * and PERIPHERAL DEVICE TYPE set to 1Fh).
+ *
+ *The device server is capable of supporting the specified peripheral device
+ *type on this logical unit. However, the physical device is not currently
+ *connected to this logical unit.
+ */
+
+#define DEV_NOT_CAPABLE 0x7f /* peripheral qualifier of 0x3 */
+ /* peripheral type of 0x1f */
+ /* specifies no device but target present */
+
+#define DEV_DISK_CAPABLE_NOT_PRESENT 0x20 /* peripheral qualifier of 0x1 */
+ /* peripheral type of 0 - disk */
+ /* specifies device capable, but not present */
+
+#define DEV_HISUPPORT 0x10 /* HiSup = 1; shows support for report luns */
+ /* must be returned for lun 0. */
+
+/* NOTE: Linux code assumes inquiry contains 36 bytes. Without checking length
+ * in buf[4] some linux code accesses bytes beyond 5 to retrieve vendor, product
+ * & revision. Yikes! So let us always send back 36 bytes, the minimum for
+ * inquiry result.
+ */
+#define NO_DISK_INQUIRY_RESULT_LEN 36
+
+#define MIN_INQUIRY_RESULT_LEN 5 /* 5 bytes minimum for inquiry result */
+
+/* SCSI device version for no disk inquiry result */
+#define SCSI_SPC2_VER 4 /* indicates SCSI SPC2 (SPC3 is 5) */
+
+/* Struct & Defines to support sense information. */
+
+/* The following struct is returned in sensebuf field in uiscmdrsp_scsi. It is
+ * initialized in exactly the manner that is recommended in Windows (hence the
+ * odd values).
+ * When set, these fields will have the following values:
+ * ErrorCode = 0x70 indicates current error
+ * Valid = 1 indicates sense info is valid
+ * SenseKey contains sense key as defined by SCSI specs.
+ * AdditionalSenseCode contains sense key as defined by SCSI specs.
+ * AdditionalSenseCodeQualifier contains qualifier to sense code as defined by
+ * scsi docs.
+ * AdditionalSenseLength contains will be sizeof(sense_data)-8=10.
+ */
+struct sense_data {
+ u8 errorcode:7;
+ u8 valid:1;
+ u8 segment_number;
+ u8 sense_key:4;
+ u8 reserved:1;
+ u8 incorrect_length:1;
+ u8 end_of_media:1;
+ u8 file_mark:1;
+ u8 information[4];
+ u8 additional_sense_length;
+ u8 command_specific_information[4];
+ u8 additional_sense_code;
+ u8 additional_sense_code_qualifier;
+ u8 fru_code;
+ u8 sense_key_specific[3];
+} __packed;
+
+struct net_pkt_xmt {
+ int len; /* full length of data in the packet */
+ int num_frags; /* number of fragments in frags containing data */
+ struct phys_info frags[MAX_PHYS_INFO]; /* physical page information */
+ char ethhdr[ETH_HEADER_SIZE]; /* the ethernet header */
+ struct {
+ /* these are needed for csum at uisnic end */
+ u8 valid; /* 1 = struct is valid - else ignore */
+ u8 hrawoffv; /* 1 = hwrafoff is valid */
+ u8 nhrawoffv; /* 1 = nhwrafoff is valid */
+ u16 protocol; /* specifies packet protocol */
+ u32 csum; /* value used to set skb->csum at IOPart */
+ u32 hrawoff; /* value used to set skb->h.raw at IOPart */
+ /* hrawoff points to the start of the TRANSPORT LAYER HEADER */
+ u32 nhrawoff; /* value used to set skb->nh.raw at IOPart */
+ /* nhrawoff points to the start of the NETWORK LAYER HEADER */
+ } lincsum;
+
+ /* **** NOTE ****
+ * The full packet is described in frags but the ethernet header is
+ * separately kept in ethhdr so that uisnic doesn't have "MAP" the
+ * guest memory to get to the header. uisnic needs ethhdr to
+ * determine how to route the packet.
+ */
+} __packed;
+
+struct net_pkt_xmtdone {
+ u32 xmt_done_result; /* result of NET_XMIT */
+} __packed;
+
+/* RCVPOST_BUF_SIZe must be at most page_size(4096) - cache_line_size (64) The
+ * reason is because dev_skb_alloc which is used to generate RCV_POST skbs in
+ * virtnic requires that there is "overhead" in the buffer, and pads 16 bytes. I
+ * prefer to use 1 full cache line size for "overhead" so that transfers are
+ * better. IOVM requires that a buffer be represented by 1 phys_info structure
+ * which can only cover page_size.
+ */
+#define RCVPOST_BUF_SIZE 4032
+#define MAX_NET_RCV_CHAIN \
+ ((ETH_MAX_MTU + ETH_HEADER_SIZE + RCVPOST_BUF_SIZE - 1) \
+ / RCVPOST_BUF_SIZE)
+
+struct net_pkt_rcvpost {
+ /* rcv buf size must be large enough to include ethernet data len +
+ * ethernet header len - we are choosing 2K because it is guaranteed
+ * to be describable
+ */
+ struct phys_info frag; /* physical page information for the */
+ /* single fragment 2K rcv buf */
+ u64 unique_num;
+ /* unique_num ensure that receive posts are returned to */
+ /* the Adapter which we sent them originally. */
+} __packed;
+
+struct net_pkt_rcv {
+ /* the number of receive buffers that can be chained */
+ /* is based on max mtu and size of each rcv buf */
+ u32 rcv_done_len; /* length of received data */
+ u8 numrcvbufs; /* number of receive buffers that contain the */
+ /* incoming data; guest end MUST chain these together. */
+ void *rcvbuf[MAX_NET_RCV_CHAIN]; /* list of chained rcvbufs */
+ /* each entry is a receive buffer provided by NET_RCV_POST. */
+ /* NOTE: first rcvbuf in the chain will also be provided in net.buf. */
+ u64 unique_num;
+ u32 rcvs_dropped_delta;
+} __packed;
+
+struct net_pkt_enbdis {
+ void *context;
+ u16 enable; /* 1 = enable, 0 = disable */
+} __packed;
+
+struct net_pkt_macaddr {
+ void *context;
+ u8 macaddr[MAX_MACADDR_LEN]; /* 6 bytes */
+} __packed;
+
+/* cmd rsp packet used for VNIC network traffic */
+struct uiscmdrsp_net {
+ enum net_types type;
+ void *buf;
+ union {
+ struct net_pkt_xmt xmt; /* used for NET_XMIT */
+ struct net_pkt_xmtdone xmtdone; /* used for NET_XMIT_DONE */
+ struct net_pkt_rcvpost rcvpost; /* used for NET_RCV_POST */
+ struct net_pkt_rcv rcv; /* used for NET_RCV */
+ struct net_pkt_enbdis enbdis; /* used for NET_RCV_ENBDIS, */
+ /* NET_RCV_ENBDIS_ACK, */
+ /* NET_RCV_PROMSIC, */
+ /* and NET_CONNECT_STATUS */
+ struct net_pkt_macaddr macaddr;
+ };
+} __packed;
+
+struct uiscmdrsp_scsitaskmgmt {
+ enum task_mgmt_types tasktype;
+
+ /* the type of task */
+ struct uisscsi_dest vdest;
+
+ /* the vdisk for which this task mgmt is generated */
+ u64 handle;
+
+ /* This is a handle that the guest has saved off for its own use.
+ * Its value is preserved by iopart & returned as is in the task
+ * mgmt rsp.
+ */
+ u64 notify_handle;
+
+ /* For linux guests, this is a pointer to wait_queue_head that a
+ * thread is waiting on to see if the taskmgmt command has completed.
+ * When the rsp is received by guest, the thread receiving the
+ * response uses this to notify the thread waiting for taskmgmt
+ * command completion. Its value is preserved by iopart & returned
+ * as is in the task mgmt rsp.
+ */
+ u64 notifyresult_handle;
+
+ /* this is a handle to location in guest where the result of the
+ * taskmgmt command (result field) is to saved off when the response
+ * is handled. Its value is preserved by iopart & returned as is in
+ * the task mgmt rsp.
+ */
+ char result;
+
+ /* result of taskmgmt command - set by IOPart - values are: */
+#define TASK_MGMT_FAILED 0
+} __packed;
+
+/* Used by uissd to send disk add/remove notifications to Guest */
+/* Note that the vHba pointer is not used by the Client/Guest side. */
+struct uiscmdrsp_disknotify {
+ u8 add; /* 0-remove, 1-add */
+ void *v_hba; /* channel info to route msg */
+ u32 channel, id, lun; /* SCSI Path of Disk to added or removed */
+} __packed;
+
+/* The following is used by virthba/vSCSI to send the Acquire/Release commands
+ * to the IOVM.
+ */
+struct uiscmdrsp_vdiskmgmt {
+ enum vdisk_mgmt_types vdisktype;
+
+ /* the type of task */
+ struct uisscsi_dest vdest;
+
+ /* the vdisk for which this task mgmt is generated */
+ u64 handle;
+
+ /* This is a handle that the guest has saved off for its own use.
+ * Its value is preserved by iopart & returned as is in the task
+ * mgmt rsp.
+ */
+ u64 notify_handle;
+
+ /* For linux guests, this is a pointer to wait_queue_head that a
+ * thread is waiting on to see if the tskmgmt command has completed.
+ * When the rsp is received by guest, the thread receiving the
+ * response uses this to notify the thread waiting for taskmgmt
+ * command completion. Its value is preserved by iopart & returned
+ * as is in the task mgmt rsp.
+ */
+ u64 notifyresult_handle;
+
+ /* this is a handle to location in guest where the result of the
+ * taskmgmt command (result field) is to saved off when the response
+ * is handled. Its value is preserved by iopart & returned as is in
+ * the task mgmt rsp.
+ */
+ char result;
+
+ /* result of taskmgmt command - set by IOPart - values are: */
+#define VDISK_MGMT_FAILED 0
+} __packed;
+
+/* keeping cmd & rsp info in one structure for now cmd rsp packet for scsi */
+struct uiscmdrsp {
+ char cmdtype;
+
+/* describes what type of information is in the struct */
+#define CMD_SCSI_TYPE 1
+#define CMD_NET_TYPE 2
+#define CMD_SCSITASKMGMT_TYPE 3
+#define CMD_NOTIFYGUEST_TYPE 4
+#define CMD_VDISKMGMT_TYPE 5
+ union {
+ struct uiscmdrsp_scsi scsi;
+ struct uiscmdrsp_net net;
+ struct uiscmdrsp_scsitaskmgmt scsitaskmgmt;
+ struct uiscmdrsp_disknotify disknotify;
+ struct uiscmdrsp_vdiskmgmt vdiskmgmt;
+ };
+ void *private_data; /* send the response when the cmd is */
+ /* done (scsi & scsittaskmgmt). */
+ struct uiscmdrsp *next; /* General Purpose Queue Link */
+ struct uiscmdrsp *activeQ_next; /* Used to track active commands */
+ struct uiscmdrsp *activeQ_prev; /* Used to track active commands */
+} __packed;
+
+struct iochannel_vhba {
+ struct vhba_wwnn wwnn; /* 8 bytes */
+ struct vhba_config_max max; /* 20 bytes */
+} __packed; /* total = 28 bytes */
+struct iochannel_vnic {
+ u8 macaddr[6]; /* 6 bytes */
+ u32 num_rcv_bufs; /* 4 bytes */
+ u32 mtu; /* 4 bytes */
+ uuid_le zone_uuid; /* 16 bytes */
+} __packed;
+/* This is just the header of the IO channel. It is assumed that directly after
+ * this header there is a large region of memory which contains the command and
+ * response queues as specified in cmd_q and rsp_q SIGNAL_QUEUE_HEADERS.
+ */
+struct spar_io_channel_protocol {
+ struct channel_header channel_header;
+ struct signal_queue_header cmd_q;
+ struct signal_queue_header rsp_q;
+ union {
+ struct iochannel_vhba vhba;
+ struct iochannel_vnic vnic;
+ } __packed;
+
+#define MAX_CLIENTSTRING_LEN 1024
+ /* client_string is NULL termimated so holds max -1 bytes */
+ u8 client_string[MAX_CLIENTSTRING_LEN];
+} __packed;
+
+/* INLINE functions for initializing and accessing I/O data channels */
+#define SIZEOF_PROTOCOL (COVER(sizeof(struct spar_io_channel_protocol), 64))
+#define SIZEOF_CMDRSP (COVER(sizeof(struct uiscmdrsp), 64))
+
+#define MIN_IO_CHANNEL_SIZE COVER(SIZEOF_PROTOCOL + \
+ 2 * MIN_NUMSIGNALS * SIZEOF_CMDRSP, 4096)
+
+/*
+ * INLINE function for expanding a guest's pfn-off-size into multiple 4K page
+ * pfn-off-size entires.
+ */
+
+/* use 4K page sizes when we it comes to passing page information between */
+/* Guest and IOPartition. */
+#define PI_PAGE_SIZE 0x1000
+#define PI_PAGE_MASK 0x0FFF
+
+/* returns next non-zero index on success or zero on failure (i.e. out of
+ * room)
+ */
+static inline u16
+add_physinfo_entries(u64 inp_pfn, u16 inp_off, u32 inp_len, u16 index,
+ u16 max_pi_arr_entries, struct phys_info pi_arr[])
+{
+ u32 len;
+ u16 i, firstlen;
+
+ firstlen = PI_PAGE_SIZE - inp_off;
+ if (inp_len <= firstlen) {
+ /* the input entry spans only one page - add as is */
+ if (index >= max_pi_arr_entries)
+ return 0;
+ pi_arr[index].pi_pfn = inp_pfn;
+ pi_arr[index].pi_off = (u16)inp_off;
+ pi_arr[index].pi_len = (u16)inp_len;
+ return index + 1;
+ }
+
+ /* this entry spans multiple pages */
+ for (len = inp_len, i = 0; len;
+ len -= pi_arr[index + i].pi_len, i++) {
+ if (index + i >= max_pi_arr_entries)
+ return 0;
+ pi_arr[index + i].pi_pfn = inp_pfn + i;
+ if (i == 0) {
+ pi_arr[index].pi_off = inp_off;
+ pi_arr[index].pi_len = firstlen;
+ } else {
+ pi_arr[index + i].pi_off = 0;
+ pi_arr[index + i].pi_len =
+ (u16)MINNUM(len, (u32)PI_PAGE_SIZE);
+ }
+ }
+ return index + i;
+}
+
+#endif /* __IOCHANNEL_H__ */
diff --git a/include/linux/visorbus/periodic_work.h b/include/linux/visorbus/periodic_work.h
new file mode 100644
index 0000000..0b3335a
--- /dev/null
+++ b/include/linux/visorbus/periodic_work.h
@@ -0,0 +1,40 @@
+/* periodic_work.h
+ *
+ * Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+#ifndef __PERIODIC_WORK_H__
+#define __PERIODIC_WORK_H__
+
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+
+/* PERIODIC_WORK an opaque structure to users.
+ * Fields are declared only in the implementation .c files.
+ */
+struct periodic_work;
+
+struct periodic_work *
+visor_periodic_work_create(ulong jiffy_interval,
+ struct workqueue_struct *workqueue,
+ void (*workfunc)(void *),
+ void *workfuncarg,
+ const char *devnam);
+void visor_periodic_work_destroy(struct periodic_work *pw);
+bool visor_periodic_work_nextperiod(struct periodic_work *pw);
+bool visor_periodic_work_start(struct periodic_work *pw);
+bool visor_periodic_work_stop(struct periodic_work *pw);
+
+#endif
diff --git a/include/linux/visorbus/vbushelper.h b/include/linux/visorbus/vbushelper.h
new file mode 100644
index 0000000..f1b6aac
--- /dev/null
+++ b/include/linux/visorbus/vbushelper.h
@@ -0,0 +1,46 @@
+/* vbushelper.h
+ *
+ * Copyright (C) 2011 - 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 __VBUSHELPER_H__
+#define __VBUSHELPER_H__
+
+/* TARGET_HOSTNAME specified as -DTARGET_HOSTNAME=\"thename\" on the
+ * command line
+ */
+
+#define TARGET_HOSTNAME "linuxguest"
+
+static inline void bus_device_info_init(
+ struct ultra_vbus_deviceinfo *bus_device_info_ptr,
+ const char *dev_type, const char *drv_name,
+ const char *ver, const char *ver_tag)
+{
+ memset(bus_device_info_ptr, 0, sizeof(struct ultra_vbus_deviceinfo));
+ snprintf(bus_device_info_ptr->devtype,
+ sizeof(bus_device_info_ptr->devtype),
+ "%s", (dev_type) ? dev_type : "unknownType");
+ snprintf(bus_device_info_ptr->drvname,
+ sizeof(bus_device_info_ptr->drvname),
+ "%s", (drv_name) ? drv_name : "unknownDriver");
+ snprintf(bus_device_info_ptr->infostrs,
+ sizeof(bus_device_info_ptr->infostrs), "%s\t%s\t%s",
+ (ver) ? ver : "unknownVer",
+ (ver_tag) ? ver_tag : "unknownVerTag",
+ TARGET_HOSTNAME);
+}
+
+#endif
diff --git a/include/linux/visorbus/version.h b/include/linux/visorbus/version.h
new file mode 100644
index 0000000..83d1da7
--- /dev/null
+++ b/include/linux/visorbus/version.h
@@ -0,0 +1,45 @@
+/* Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+/* 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
+
+/* 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
diff --git a/include/linux/visorbus/visorbus.h b/include/linux/visorbus/visorbus.h
new file mode 100644
index 0000000..9baf1ec
--- /dev/null
+++ b/include/linux/visorbus/visorbus.h
@@ -0,0 +1,234 @@
+/* visorbus.h
+ *
+ * Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ */
+
+/*
+ * This header file is to be included by other kernel mode components that
+ * implement a particular kind of visor_device. Each of these other kernel
+ * mode components is called a visor device driver. Refer to visortemplate
+ * for a minimal sample visor device driver.
+ *
+ * There should be nothing in this file that is private to the visorbus
+ * bus implementation itself.
+ *
+ */
+
+#ifndef __VISORBUS_H__
+#define __VISORBUS_H__
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+#include <linux/kernel.h>
+#include <linux/uuid.h>
+
+#include "periodic_work.h"
+#include "channel.h"
+
+struct visor_driver;
+struct visor_device;
+extern struct bus_type visorbus_type;
+
+typedef void (*visorbus_state_complete_func) (struct visor_device *dev,
+ int status);
+struct visorchipset_state {
+ u32 created:1;
+ u32 attached:1;
+ u32 configured:1;
+ u32 running:1;
+ /* Add new fields above. */
+ /* Remaining bits in this 32-bit word are unused. */
+};
+
+/** This struct describes a specific Supervisor channel, by providing its
+ * GUID, name, and sizes.
+ */
+struct visor_channeltype_descriptor {
+ const uuid_le guid;
+ const char *name;
+};
+
+/**
+ * struct visor_driver - Information provided by each visor driver when it
+ * registers with the visorbus driver.
+ * @name: Name of the visor driver.
+ * @version: The numbered version of the driver (x.x.xxx).
+ * @vertag: A human readable version string.
+ * @owner: The module owner.
+ * @channel_types: Types of channels handled by this driver, ending with
+ * a zero GUID. Our specialized BUS.match() method knows
+ * about this list, and uses it to determine whether this
+ * driver will in fact handle a new device that it has
+ * detected.
+ * @probe: Called when a new device comes online, by our probe()
+ * function specified by driver.probe() (triggered
+ * ultimately by some call to driver_register(),
+ * bus_add_driver(), or driver_attach()).
+ * @remove: Called when a new device is removed, by our remove()
+ * function specified by driver.remove() (triggered
+ * ultimately by some call to device_release_driver()).
+ * @channel_interrupt: Called periodically, whenever there is a possiblity
+ * that "something interesting" may have happened to the
+ * channel.
+ * @pause: Called to initiate a change of the device's state. If
+ * the return valu`e is < 0, there was an error and the
+ * state transition will NOT occur. If the return value
+ * is >= 0, then the state transition was INITIATED
+ * successfully, and complete_func() will be called (or
+ * was just called) with the final status when either the
+ * state transition fails or completes successfully.
+ * @resume: Behaves similar to pause.
+ * @driver: Private reference to the device driver. For use by bus
+ * driver only.
+ * @version_attr: Private version field. For use by bus driver only.
+ */
+struct visor_driver {
+ const char *name;
+ const char *version;
+ const char *vertag;
+ struct module *owner;
+ struct visor_channeltype_descriptor *channel_types;
+ int (*probe)(struct visor_device *dev);
+ void (*remove)(struct visor_device *dev);
+ void (*channel_interrupt)(struct visor_device *dev);
+ int (*pause)(struct visor_device *dev,
+ visorbus_state_complete_func complete_func);
+ int (*resume)(struct visor_device *dev,
+ visorbus_state_complete_func complete_func);
+
+ /* These fields are for private use by the bus driver only. */
+ struct device_driver driver;
+ struct driver_attribute version_attr;
+};
+
+#define to_visor_driver(x) ((x) ? \
+ (container_of(x, struct visor_driver, driver)) : (NULL))
+
+/**
+ * struct visor_device - A device type for things "plugged" into the visorbus
+ * bus
+ * visorchannel: Points to the channel that the device is
+ * associated with.
+ * channel_type_guid: Identifies the channel type to the bus driver.
+ * device: Device struct meant for use by the bus driver
+ * only.
+ * list_all: Used by the bus driver to enumerate devices.
+ * periodic_work: Device work queue. Private use by bus driver
+ * only.
+ * being_removed: Indicates that the device is being removed from
+ * the bus. Private bus driver use only.
+ * visordriver_callback_lock: Used by the bus driver to lock when handling
+ * channel events.
+ * pausing: Indicates that a change towards a paused state.
+ * is in progress. Only modified by the bus driver.
+ * resuming: Indicates that a change towards a running state
+ * is in progress. Only modified by the bus driver.
+ * chipset_bus_no: Private field used by the bus driver.
+ * chipset_dev_no: Private field used the bus driver.
+ * state: Used to indicate the current state of the
+ * device.
+ * inst: Unique GUID for this instance of the device.
+ * name: Name of the device.
+ * pending_msg_hdr: For private use by bus driver to respond to
+ * hypervisor requests.
+ * vbus_hdr_info: A pointer to header info. Private use by bus
+ * driver.
+ * partition_uuid: Indicates client partion id. This should be the
+ * same across all visor_devices in the current
+ * guest. Private use by bus driver only.
+ */
+
+struct visor_device {
+ struct visorchannel *visorchannel;
+ uuid_le channel_type_guid;
+ /* These fields are for private use by the bus driver only. */
+ struct device device;
+ struct list_head list_all;
+ struct periodic_work *periodic_work;
+ bool being_removed;
+ struct semaphore visordriver_callback_lock;
+ bool pausing;
+ bool resuming;
+ u32 chipset_bus_no;
+ u32 chipset_dev_no;
+ struct visorchipset_state state;
+ uuid_le inst;
+ u8 *name;
+ struct controlvm_message_header *pending_msg_hdr;
+ void *vbus_hdr_info;
+ uuid_le partition_uuid;
+};
+
+#define to_visor_device(x) container_of(x, struct visor_device, device)
+
+#ifndef STANDALONE_CLIENT
+int visorbus_register_visor_driver(struct visor_driver *);
+void visorbus_unregister_visor_driver(struct visor_driver *);
+int visorbus_read_channel(struct visor_device *dev,
+ unsigned long offset, void *dest,
+ unsigned long nbytes);
+int visorbus_write_channel(struct visor_device *dev,
+ unsigned long offset, void *src,
+ unsigned long nbytes);
+int visorbus_clear_channel(struct visor_device *dev,
+ unsigned long offset, u8 ch, unsigned long nbytes);
+void visorbus_enable_channel_interrupts(struct visor_device *dev);
+void visorbus_disable_channel_interrupts(struct visor_device *dev);
+#endif
+
+/* Note that for visorchannel_create()
+ * <channel_bytes> and <guid> arguments may be 0 if we are a channel CLIENT.
+ * In this case, the values can simply be read from the channel header.
+ */
+struct visorchannel *visorchannel_create(u64 physaddr,
+ unsigned long channel_bytes,
+ gfp_t gfp, uuid_le guid);
+struct visorchannel *visorchannel_create_with_lock(u64 physaddr,
+ unsigned long channel_bytes,
+ gfp_t gfp, uuid_le guid);
+void visorchannel_destroy(struct visorchannel *channel);
+int visorchannel_read(struct visorchannel *channel, ulong offset,
+ void *local, ulong nbytes);
+int visorchannel_write(struct visorchannel *channel, ulong offset,
+ void *local, ulong nbytes);
+int visorchannel_clear(struct visorchannel *channel, ulong offset,
+ u8 ch, ulong nbytes);
+bool visorchannel_signalremove(struct visorchannel *channel, u32 queue,
+ void *msg);
+bool visorchannel_signalinsert(struct visorchannel *channel, u32 queue,
+ void *msg);
+bool visorchannel_signalempty(struct visorchannel *channel, u32 queue);
+
+int visorchannel_signalqueue_slots_avail(struct visorchannel *channel,
+ u32 queue);
+int visorchannel_signalqueue_max_slots(struct visorchannel *channel, u32 queue);
+u64 visorchannel_get_physaddr(struct visorchannel *channel);
+ulong visorchannel_get_nbytes(struct visorchannel *channel);
+char *visorchannel_id(struct visorchannel *channel, char *s);
+char *visorchannel_zoneid(struct visorchannel *channel, char *s);
+u64 visorchannel_get_clientpartition(struct visorchannel *channel);
+int visorchannel_set_clientpartition(struct visorchannel *channel,
+ u64 partition_handle);
+uuid_le visorchannel_get_uuid(struct visorchannel *channel);
+char *visorchannel_uuid_id(uuid_le *guid, char *s);
+void visorchannel_debug(struct visorchannel *channel, int num_queues,
+ struct seq_file *seq, u32 off);
+void __iomem *visorchannel_get_header(struct visorchannel *channel);
+
+#define BUS_ROOT_DEVICE UINT_MAX
+struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no,
+ struct visor_device *from);
+#endif
--
1.9.1
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