2 * Copyright (c) 2009, Microsoft Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
18 * Haiyang Zhang <haiyangz@microsoft.com>
19 * Hank Janssen <hjanssen@microsoft.com>
21 #include <linux/kernel.h>
23 #include <linux/slab.h>
24 #include <linux/list.h>
25 #include <linux/module.h>
26 #include <linux/completion.h>
29 #include "vmbus_private.h"
32 struct vmbus_channel_message_table_entry {
33 enum vmbus_channel_message_type messageType;
34 void (*messageHandler)(struct vmbus_channel_message_header *msg);
37 #define MAX_MSG_TYPES 3
38 #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 7
40 static const struct hv_guid
41 gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = {
42 /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */
46 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d,
47 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f
51 /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */
55 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46,
56 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E
60 /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */
64 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c,
65 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A
69 /* {32412632-86cb-44a2-9b5c-50d1417354f5} */
73 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44,
74 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5
77 /* 0E0B6031-5213-4934-818B-38D90CED39DB */
81 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
82 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
85 /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */
89 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
90 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf
93 /* {57164f39-9115-4e78-ab55-382f3bd5422d} */
97 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
98 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d
105 * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message
106 * @icmsghdrp: Pointer to msg header structure
107 * @icmsg_negotiate: Pointer to negotiate message structure
108 * @buf: Raw buffer channel data
110 * @icmsghdrp is of type &struct icmsg_hdr.
111 * @negop is of type &struct icmsg_negotiate.
112 * Set up and fill in default negotiate response message. This response can
113 * come from both the vmbus driver and the hv_utils driver. The current api
114 * will respond properly to both Windows 2008 and Windows 2008-R2 operating
117 * Mainly used by Hyper-V drivers.
119 void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp,
120 struct icmsg_negotiate *negop,
123 if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
124 icmsghdrp->icmsgsize = 0x10;
126 negop = (struct icmsg_negotiate *)&buf[
127 sizeof(struct vmbuspipe_hdr) +
128 sizeof(struct icmsg_hdr)];
130 if (negop->icframe_vercnt == 2 &&
131 negop->icversion_data[1].major == 3) {
132 negop->icversion_data[0].major = 3;
133 negop->icversion_data[0].minor = 0;
134 negop->icversion_data[1].major = 3;
135 negop->icversion_data[1].minor = 0;
137 negop->icversion_data[0].major = 1;
138 negop->icversion_data[0].minor = 0;
139 negop->icversion_data[1].major = 1;
140 negop->icversion_data[1].minor = 0;
143 negop->icframe_vercnt = 1;
144 negop->icmsg_vercnt = 1;
147 EXPORT_SYMBOL(prep_negotiate_resp);
150 * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK
152 * @context: Pointer to argument structure.
154 * Set up the default handler for non device driver specific requests
155 * from Hyper-V. This stub responds to the default negotiate messages
156 * that come in for every non IDE/SCSI/Network request.
157 * This behavior is normally overwritten in the hv_utils driver. That
158 * driver handles requests like gracefull shutdown, heartbeats etc.
160 * Mainly used by Hyper-V drivers.
162 void chn_cb_negotiate(void *context)
164 struct vmbus_channel *channel = context;
169 struct icmsg_hdr *icmsghdrp;
170 struct icmsg_negotiate *negop = NULL;
173 buf = kmalloc(buflen, GFP_ATOMIC);
175 VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
178 icmsghdrp = (struct icmsg_hdr *)&buf[
179 sizeof(struct vmbuspipe_hdr)];
181 prep_negotiate_resp(icmsghdrp, negop, buf);
183 icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
184 | ICMSGHDRFLAG_RESPONSE;
186 VmbusChannelSendPacket(channel, buf,
188 VmbusPacketTypeDataInBand, 0);
193 EXPORT_SYMBOL(chn_cb_negotiate);
196 * Function table used for message responses for non IDE/SCSI/Network type
197 * messages. (Such as KVP/Shutdown etc)
199 struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = {
200 /* 0E0B6031-5213-4934-818B-38D90CED39DB */
203 .msg_type = HV_SHUTDOWN_MSG,
205 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
206 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
208 .callback = chn_cb_negotiate,
209 .log_msg = "Shutdown channel functionality initialized"
212 /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */
215 .msg_type = HV_TIMESYNC_MSG,
217 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
218 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf
220 .callback = chn_cb_negotiate,
221 .log_msg = "Timesync channel functionality initialized"
223 /* {57164f39-9115-4e78-ab55-382f3bd5422d} */
226 .msg_type = HV_HEARTBEAT_MSG,
228 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
229 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d
231 .callback = chn_cb_negotiate,
232 .log_msg = "Heartbeat channel functionality initialized"
235 EXPORT_SYMBOL(hv_cb_utils);
238 * AllocVmbusChannel - Allocate and initialize a vmbus channel object
240 struct vmbus_channel *AllocVmbusChannel(void)
242 struct vmbus_channel *channel;
244 channel = kzalloc(sizeof(*channel), GFP_ATOMIC);
248 spin_lock_init(&channel->inbound_lock);
250 init_timer(&channel->poll_timer);
251 channel->poll_timer.data = (unsigned long)channel;
252 channel->poll_timer.function = VmbusChannelOnTimer;
254 channel->ControlWQ = create_workqueue("hv_vmbus_ctl");
255 if (!channel->ControlWQ) {
264 * ReleaseVmbusChannel - Release the vmbus channel object itself
266 static inline void ReleaseVmbusChannel(void *context)
268 struct vmbus_channel *channel = context;
272 DPRINT_DBG(VMBUS, "releasing channel (%p)", channel);
273 destroy_workqueue(channel->ControlWQ);
274 DPRINT_DBG(VMBUS, "channel released (%p)", channel);
282 * FreeVmbusChannel - Release the resources used by the vmbus channel object
284 void FreeVmbusChannel(struct vmbus_channel *Channel)
286 del_timer_sync(&Channel->poll_timer);
289 * We have to release the channel's workqueue/thread in the vmbus's
290 * workqueue/thread context
291 * ie we can't destroy ourselves.
293 osd_schedule_callback(gVmbusConnection.WorkQueue, ReleaseVmbusChannel,
298 DECLARE_COMPLETION(hv_channel_ready);
301 * Count initialized channels, and ensure all channels are ready when hv_vmbus
302 * module loading completes.
304 static void count_hv_channel(void)
309 spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
310 if (++counter == MAX_MSG_TYPES)
311 complete(&hv_channel_ready);
312 spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags);
317 * VmbusChannelProcessOffer - Process the offer by creating a channel/device
318 * associated with this offer
320 static void VmbusChannelProcessOffer(void *context)
322 struct vmbus_channel *newChannel = context;
323 struct vmbus_channel *channel;
331 /* Make sure this is a new offer */
332 spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
334 list_for_each_entry(channel, &gVmbusConnection.ChannelList, ListEntry) {
335 if (!memcmp(&channel->OfferMsg.Offer.InterfaceType,
336 &newChannel->OfferMsg.Offer.InterfaceType,
337 sizeof(struct hv_guid)) &&
338 !memcmp(&channel->OfferMsg.Offer.InterfaceInstance,
339 &newChannel->OfferMsg.Offer.InterfaceInstance,
340 sizeof(struct hv_guid))) {
347 list_add_tail(&newChannel->ListEntry,
348 &gVmbusConnection.ChannelList);
350 spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags);
353 DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)",
354 newChannel->OfferMsg.ChildRelId);
355 FreeVmbusChannel(newChannel);
361 * Start the process of binding this offer to the driver
362 * We need to set the DeviceObject field before calling
363 * VmbusChildDeviceAdd()
365 newChannel->DeviceObject = VmbusChildDeviceCreate(
366 &newChannel->OfferMsg.Offer.InterfaceType,
367 &newChannel->OfferMsg.Offer.InterfaceInstance,
370 DPRINT_DBG(VMBUS, "child device object allocated - %p",
371 newChannel->DeviceObject);
374 * Add the new device to the bus. This will kick off device-driver
375 * binding which eventually invokes the device driver's AddDevice()
378 ret = VmbusChildDeviceAdd(newChannel->DeviceObject);
381 "unable to add child device object (relid %d)",
382 newChannel->OfferMsg.ChildRelId);
384 spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
385 list_del(&newChannel->ListEntry);
386 spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags);
388 FreeVmbusChannel(newChannel);
391 * This state is used to indicate a successful open
392 * so that when we do close the channel normally, we
393 * can cleanup properly
395 newChannel->State = CHANNEL_OPEN_STATE;
397 /* Open IC channels */
398 for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) {
399 if (memcmp(&newChannel->OfferMsg.Offer.InterfaceType,
400 &hv_cb_utils[cnt].data,
401 sizeof(struct hv_guid)) == 0 &&
402 VmbusChannelOpen(newChannel, 2 * PAGE_SIZE,
403 2 * PAGE_SIZE, NULL, 0,
404 hv_cb_utils[cnt].callback,
406 hv_cb_utils[cnt].channel = newChannel;
407 DPRINT_INFO(VMBUS, "%s",
408 hv_cb_utils[cnt].log_msg);
417 * VmbusChannelProcessRescindOffer - Rescind the offer by initiating a device removal
419 static void VmbusChannelProcessRescindOffer(void *context)
421 struct vmbus_channel *channel = context;
424 VmbusChildDeviceRemove(channel->DeviceObject);
429 * VmbusChannelOnOffer - Handler for channel offers from vmbus in parent partition.
431 * We ignore all offers except network and storage offers. For each network and
432 * storage offers, we create a channel object and queue a work item to the
433 * channel object to process the offer synchronously
435 static void VmbusChannelOnOffer(struct vmbus_channel_message_header *hdr)
437 struct vmbus_channel_offer_channel *offer;
438 struct vmbus_channel *newChannel;
439 struct hv_guid *guidType;
440 struct hv_guid *guidInstance;
446 offer = (struct vmbus_channel_offer_channel *)hdr;
447 for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) {
448 if (memcmp(&offer->Offer.InterfaceType,
449 &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) {
456 DPRINT_DBG(VMBUS, "Ignoring channel offer notification for "
457 "child relid %d", offer->ChildRelId);
462 guidType = &offer->Offer.InterfaceType;
463 guidInstance = &offer->Offer.InterfaceInstance;
465 DPRINT_INFO(VMBUS, "Channel offer notification - "
466 "child relid %d monitor id %d allocated %d, "
467 "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-"
468 "%02x%02x%02x%02x%02x%02x%02x%02x} "
469 "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-"
470 "%02x%02x%02x%02x%02x%02x%02x%02x}",
471 offer->ChildRelId, offer->MonitorId,
472 offer->MonitorAllocated,
473 guidType->data[3], guidType->data[2],
474 guidType->data[1], guidType->data[0],
475 guidType->data[5], guidType->data[4],
476 guidType->data[7], guidType->data[6],
477 guidType->data[8], guidType->data[9],
478 guidType->data[10], guidType->data[11],
479 guidType->data[12], guidType->data[13],
480 guidType->data[14], guidType->data[15],
481 guidInstance->data[3], guidInstance->data[2],
482 guidInstance->data[1], guidInstance->data[0],
483 guidInstance->data[5], guidInstance->data[4],
484 guidInstance->data[7], guidInstance->data[6],
485 guidInstance->data[8], guidInstance->data[9],
486 guidInstance->data[10], guidInstance->data[11],
487 guidInstance->data[12], guidInstance->data[13],
488 guidInstance->data[14], guidInstance->data[15]);
490 /* Allocate the channel object and save this offer. */
491 newChannel = AllocVmbusChannel();
493 DPRINT_ERR(VMBUS, "unable to allocate channel object");
497 DPRINT_DBG(VMBUS, "channel object allocated - %p", newChannel);
499 memcpy(&newChannel->OfferMsg, offer,
500 sizeof(struct vmbus_channel_offer_channel));
501 newChannel->MonitorGroup = (u8)offer->MonitorId / 32;
502 newChannel->MonitorBit = (u8)offer->MonitorId % 32;
504 /* TODO: Make sure the offer comes from our parent partition */
505 osd_schedule_callback(newChannel->ControlWQ, VmbusChannelProcessOffer,
512 * VmbusChannelOnOfferRescind - Rescind offer handler.
514 * We queue a work item to process this offer synchronously
516 static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr)
518 struct vmbus_channel_rescind_offer *rescind;
519 struct vmbus_channel *channel;
523 rescind = (struct vmbus_channel_rescind_offer *)hdr;
524 channel = GetChannelFromRelId(rescind->ChildRelId);
525 if (channel == NULL) {
526 DPRINT_DBG(VMBUS, "channel not found for relId %d",
527 rescind->ChildRelId);
531 osd_schedule_callback(channel->ControlWQ,
532 VmbusChannelProcessRescindOffer,
539 * VmbusChannelOnOffersDelivered - This is invoked when all offers have been delivered.
541 * Nothing to do here.
543 static void VmbusChannelOnOffersDelivered(
544 struct vmbus_channel_message_header *hdr)
551 * VmbusChannelOnOpenResult - Open result handler.
553 * This is invoked when we received a response to our channel open request.
554 * Find the matching request, copy the response and signal the requesting
557 static void VmbusChannelOnOpenResult(struct vmbus_channel_message_header *hdr)
559 struct vmbus_channel_open_result *result;
560 struct list_head *curr;
561 struct vmbus_channel_msginfo *msgInfo;
562 struct vmbus_channel_message_header *requestHeader;
563 struct vmbus_channel_open_channel *openMsg;
568 result = (struct vmbus_channel_open_result *)hdr;
569 DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status);
572 * Find the open msg, copy the result and signal/unblock the wait event
574 spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
576 list_for_each(curr, &gVmbusConnection.ChannelMsgList) {
577 /* FIXME: this should probably use list_entry() instead */
578 msgInfo = (struct vmbus_channel_msginfo *)curr;
579 requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg;
581 if (requestHeader->MessageType == ChannelMessageOpenChannel) {
582 openMsg = (struct vmbus_channel_open_channel *)msgInfo->Msg;
583 if (openMsg->ChildRelId == result->ChildRelId &&
584 openMsg->OpenId == result->OpenId) {
585 memcpy(&msgInfo->Response.OpenResult,
587 sizeof(struct vmbus_channel_open_result));
588 osd_WaitEventSet(msgInfo->WaitEvent);
593 spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
599 * VmbusChannelOnGpadlCreated - GPADL created handler.
601 * This is invoked when we received a response to our gpadl create request.
602 * Find the matching request, copy the response and signal the requesting
605 static void VmbusChannelOnGpadlCreated(struct vmbus_channel_message_header *hdr)
607 struct vmbus_channel_gpadl_created *gpadlCreated;
608 struct list_head *curr;
609 struct vmbus_channel_msginfo *msgInfo;
610 struct vmbus_channel_message_header *requestHeader;
611 struct vmbus_channel_gpadl_header *gpadlHeader;
616 gpadlCreated = (struct vmbus_channel_gpadl_created *)hdr;
617 DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d",
618 gpadlCreated->CreationStatus);
621 * Find the establish msg, copy the result and signal/unblock the wait
624 spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
626 list_for_each(curr, &gVmbusConnection.ChannelMsgList) {
627 /* FIXME: this should probably use list_entry() instead */
628 msgInfo = (struct vmbus_channel_msginfo *)curr;
629 requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg;
631 if (requestHeader->MessageType == ChannelMessageGpadlHeader) {
632 gpadlHeader = (struct vmbus_channel_gpadl_header *)requestHeader;
634 if ((gpadlCreated->ChildRelId ==
635 gpadlHeader->ChildRelId) &&
636 (gpadlCreated->Gpadl == gpadlHeader->Gpadl)) {
637 memcpy(&msgInfo->Response.GpadlCreated,
639 sizeof(struct vmbus_channel_gpadl_created));
640 osd_WaitEventSet(msgInfo->WaitEvent);
645 spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
651 * VmbusChannelOnGpadlTorndown - GPADL torndown handler.
653 * This is invoked when we received a response to our gpadl teardown request.
654 * Find the matching request, copy the response and signal the requesting
657 static void VmbusChannelOnGpadlTorndown(
658 struct vmbus_channel_message_header *hdr)
660 struct vmbus_channel_gpadl_torndown *gpadlTorndown;
661 struct list_head *curr;
662 struct vmbus_channel_msginfo *msgInfo;
663 struct vmbus_channel_message_header *requestHeader;
664 struct vmbus_channel_gpadl_teardown *gpadlTeardown;
669 gpadlTorndown = (struct vmbus_channel_gpadl_torndown *)hdr;
672 * Find the open msg, copy the result and signal/unblock the wait event
674 spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
676 list_for_each(curr, &gVmbusConnection.ChannelMsgList) {
677 /* FIXME: this should probably use list_entry() instead */
678 msgInfo = (struct vmbus_channel_msginfo *)curr;
679 requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg;
681 if (requestHeader->MessageType == ChannelMessageGpadlTeardown) {
682 gpadlTeardown = (struct vmbus_channel_gpadl_teardown *)requestHeader;
684 if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl) {
685 memcpy(&msgInfo->Response.GpadlTorndown,
687 sizeof(struct vmbus_channel_gpadl_torndown));
688 osd_WaitEventSet(msgInfo->WaitEvent);
693 spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
699 * VmbusChannelOnVersionResponse - Version response handler
701 * This is invoked when we received a response to our initiate contact request.
702 * Find the matching request, copy the response and signal the requesting
705 static void VmbusChannelOnVersionResponse(
706 struct vmbus_channel_message_header *hdr)
708 struct list_head *curr;
709 struct vmbus_channel_msginfo *msgInfo;
710 struct vmbus_channel_message_header *requestHeader;
711 struct vmbus_channel_initiate_contact *initiate;
712 struct vmbus_channel_version_response *versionResponse;
717 versionResponse = (struct vmbus_channel_version_response *)hdr;
718 spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags);
720 list_for_each(curr, &gVmbusConnection.ChannelMsgList) {
721 /* FIXME: this should probably use list_entry() instead */
722 msgInfo = (struct vmbus_channel_msginfo *)curr;
723 requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg;
725 if (requestHeader->MessageType ==
726 ChannelMessageInitiateContact) {
727 initiate = (struct vmbus_channel_initiate_contact *)requestHeader;
728 memcpy(&msgInfo->Response.VersionResponse,
730 sizeof(struct vmbus_channel_version_response));
731 osd_WaitEventSet(msgInfo->WaitEvent);
734 spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags);
739 /* Channel message dispatch table */
740 static struct vmbus_channel_message_table_entry
741 gChannelMessageTable[ChannelMessageCount] = {
742 {ChannelMessageInvalid, NULL},
743 {ChannelMessageOfferChannel, VmbusChannelOnOffer},
744 {ChannelMessageRescindChannelOffer, VmbusChannelOnOfferRescind},
745 {ChannelMessageRequestOffers, NULL},
746 {ChannelMessageAllOffersDelivered, VmbusChannelOnOffersDelivered},
747 {ChannelMessageOpenChannel, NULL},
748 {ChannelMessageOpenChannelResult, VmbusChannelOnOpenResult},
749 {ChannelMessageCloseChannel, NULL},
750 {ChannelMessageGpadlHeader, NULL},
751 {ChannelMessageGpadlBody, NULL},
752 {ChannelMessageGpadlCreated, VmbusChannelOnGpadlCreated},
753 {ChannelMessageGpadlTeardown, NULL},
754 {ChannelMessageGpadlTorndown, VmbusChannelOnGpadlTorndown},
755 {ChannelMessageRelIdReleased, NULL},
756 {ChannelMessageInitiateContact, NULL},
757 {ChannelMessageVersionResponse, VmbusChannelOnVersionResponse},
758 {ChannelMessageUnload, NULL},
762 * VmbusOnChannelMessage - Handler for channel protocol messages.
764 * This is invoked in the vmbus worker thread context.
766 void VmbusOnChannelMessage(void *Context)
768 struct hv_message *msg = Context;
769 struct vmbus_channel_message_header *hdr;
774 hdr = (struct vmbus_channel_message_header *)msg->u.Payload;
775 size = msg->Header.PayloadSize;
777 DPRINT_DBG(VMBUS, "message type %d size %d", hdr->MessageType, size);
779 if (hdr->MessageType >= ChannelMessageCount) {
781 "Received invalid channel message type %d size %d",
782 hdr->MessageType, size);
783 print_hex_dump_bytes("", DUMP_PREFIX_NONE,
784 (unsigned char *)msg->u.Payload, size);
789 if (gChannelMessageTable[hdr->MessageType].messageHandler)
790 gChannelMessageTable[hdr->MessageType].messageHandler(hdr);
792 DPRINT_ERR(VMBUS, "Unhandled channel message type %d",
795 /* Free the msg that was allocated in VmbusOnMsgDPC() */
801 * VmbusChannelRequestOffers - Send a request to get all our pending offers.
803 int VmbusChannelRequestOffers(void)
805 struct vmbus_channel_message_header *msg;
806 struct vmbus_channel_msginfo *msgInfo;
811 msgInfo = kmalloc(sizeof(*msgInfo) +
812 sizeof(struct vmbus_channel_message_header),
817 msgInfo->WaitEvent = osd_WaitEventCreate();
818 if (!msgInfo->WaitEvent) {
823 msg = (struct vmbus_channel_message_header *)msgInfo->Msg;
825 msg->MessageType = ChannelMessageRequestOffers;
827 /*SpinlockAcquire(gVmbusConnection.channelMsgLock);
828 INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList,
829 &msgInfo->msgListEntry);
830 SpinlockRelease(gVmbusConnection.channelMsgLock);*/
832 ret = VmbusPostMessage(msg,
833 sizeof(struct vmbus_channel_message_header));
835 DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret);
837 /*SpinlockAcquire(gVmbusConnection.channelMsgLock);
838 REMOVE_ENTRY_LIST(&msgInfo->msgListEntry);
839 SpinlockRelease(gVmbusConnection.channelMsgLock);*/
843 /* osd_WaitEventWait(msgInfo->waitEvent); */
845 /*SpinlockAcquire(gVmbusConnection.channelMsgLock);
846 REMOVE_ENTRY_LIST(&msgInfo->msgListEntry);
847 SpinlockRelease(gVmbusConnection.channelMsgLock);*/
852 kfree(msgInfo->WaitEvent);
861 * VmbusChannelReleaseUnattachedChannels - Release channels that are
862 * unattached/unconnected ie (no drivers associated)
864 void VmbusChannelReleaseUnattachedChannels(void)
866 struct vmbus_channel *channel, *pos;
867 struct vmbus_channel *start = NULL;
870 spin_lock_irqsave(&gVmbusConnection.channel_lock, flags);
872 list_for_each_entry_safe(channel, pos, &gVmbusConnection.ChannelList,
874 if (channel == start)
877 if (!channel->DeviceObject->Driver) {
878 list_del(&channel->ListEntry);
880 "Releasing unattached device object %p",
881 channel->DeviceObject);
883 VmbusChildDeviceRemove(channel->DeviceObject);
884 FreeVmbusChannel(channel);
891 spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags);