Commit | Line | Data |
---|---|---|
3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
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. | |
7 | * | |
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 | |
11 | * more details. | |
12 | * | |
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. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
a0086dc5 GKH |
21 | #include <linux/kernel.h> |
22 | #include <linux/mm.h> | |
4983b39a | 23 | #include "osd.h" |
645954c5 | 24 | #include "logging.h" |
3e7ee490 HJ |
25 | #include "VmbusPrivate.h" |
26 | ||
1d7e907f | 27 | struct vmbus_channel_message_table_entry { |
c8212f04 GKH |
28 | enum vmbus_channel_message_type messageType; |
29 | void (*messageHandler)(struct vmbus_channel_message_header *msg); | |
1d7e907f | 30 | }; |
3e7ee490 | 31 | |
3e7ee490 | 32 | #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 4 |
bd60c33e GKH |
33 | static const struct hv_guid |
34 | gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = { | |
454f18a9 | 35 | /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ |
caf26a31 GKH |
36 | /* Storage - SCSI */ |
37 | { | |
38 | .data = { | |
39 | 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
40 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f | |
41 | } | |
42 | }, | |
43 | ||
454f18a9 | 44 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
caf26a31 GKH |
45 | /* Network */ |
46 | { | |
47 | .data = { | |
48 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
49 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
50 | } | |
51 | }, | |
52 | ||
454f18a9 | 53 | /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */ |
caf26a31 GKH |
54 | /* Input */ |
55 | { | |
56 | .data = { | |
57 | 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, | |
58 | 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A | |
59 | } | |
60 | }, | |
3e7ee490 | 61 | |
caf26a31 GKH |
62 | /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ |
63 | /* IDE */ | |
64 | { | |
65 | .data = { | |
66 | 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, | |
67 | 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 | |
68 | } | |
69 | }, | |
3e7ee490 HJ |
70 | }; |
71 | ||
bd60c33e GKH |
72 | /** |
73 | * AllocVmbusChannel - Allocate and initialize a vmbus channel object | |
74 | */ | |
aded7165 | 75 | struct vmbus_channel *AllocVmbusChannel(void) |
3e7ee490 | 76 | { |
aded7165 | 77 | struct vmbus_channel *channel; |
3e7ee490 | 78 | |
aded7165 | 79 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
3e7ee490 | 80 | if (!channel) |
3e7ee490 | 81 | return NULL; |
3e7ee490 | 82 | |
54411c42 | 83 | spin_lock_init(&channel->inbound_lock); |
3e7ee490 | 84 | |
c8a429a4 GKH |
85 | init_timer(&channel->poll_timer); |
86 | channel->poll_timer.data = (unsigned long)channel; | |
87 | channel->poll_timer.function = VmbusChannelOnTimer; | |
3e7ee490 | 88 | |
de65a384 | 89 | channel->ControlWQ = create_workqueue("hv_vmbus_ctl"); |
bd60c33e | 90 | if (!channel->ControlWQ) { |
8c69f52a | 91 | kfree(channel); |
3e7ee490 HJ |
92 | return NULL; |
93 | } | |
94 | ||
95 | return channel; | |
96 | } | |
97 | ||
bd60c33e GKH |
98 | /** |
99 | * ReleaseVmbusChannel - Release the vmbus channel object itself | |
100 | */ | |
101 | static inline void ReleaseVmbusChannel(void *context) | |
3e7ee490 | 102 | { |
bd60c33e | 103 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
104 | |
105 | DPRINT_ENTER(VMBUS); | |
106 | ||
107 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); | |
de65a384 | 108 | destroy_workqueue(channel->ControlWQ); |
3e7ee490 HJ |
109 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
110 | ||
8c69f52a | 111 | kfree(channel); |
3e7ee490 HJ |
112 | |
113 | DPRINT_EXIT(VMBUS); | |
114 | } | |
115 | ||
bd60c33e GKH |
116 | /** |
117 | * FreeVmbusChannel - Release the resources used by the vmbus channel object | |
118 | */ | |
aded7165 | 119 | void FreeVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 | 120 | { |
c8a429a4 | 121 | del_timer(&Channel->poll_timer); |
3e7ee490 | 122 | |
bd60c33e GKH |
123 | /* |
124 | * We have to release the channel's workqueue/thread in the vmbus's | |
125 | * workqueue/thread context | |
126 | * ie we can't destroy ourselves. | |
127 | */ | |
de65a384 | 128 | osd_schedule_callback(gVmbusConnection.WorkQueue, ReleaseVmbusChannel, |
bd60c33e | 129 | Channel); |
3e7ee490 HJ |
130 | } |
131 | ||
bd60c33e GKH |
132 | /** |
133 | * VmbusChannelProcessOffer - Process the offer by creating a channel/device associated with this offer | |
134 | */ | |
135 | static void VmbusChannelProcessOffer(void *context) | |
3e7ee490 | 136 | { |
aded7165 GKH |
137 | struct vmbus_channel *newChannel = context; |
138 | struct vmbus_channel *channel; | |
bd60c33e GKH |
139 | LIST_ENTRY *anchor; |
140 | LIST_ENTRY *curr; | |
0e727613 | 141 | bool fNew = true; |
bd60c33e | 142 | int ret; |
0f5e44ca | 143 | unsigned long flags; |
3e7ee490 HJ |
144 | |
145 | DPRINT_ENTER(VMBUS); | |
146 | ||
454f18a9 | 147 | /* Make sure this is a new offer */ |
0f5e44ca | 148 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 149 | |
bd60c33e GKH |
150 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelList) { |
151 | channel = CONTAINING_RECORD(curr, struct vmbus_channel, | |
152 | ListEntry); | |
3e7ee490 | 153 | |
bd60c33e GKH |
154 | if (!memcmp(&channel->OfferMsg.Offer.InterfaceType, |
155 | &newChannel->OfferMsg.Offer.InterfaceType, | |
156 | sizeof(struct hv_guid)) && | |
157 | !memcmp(&channel->OfferMsg.Offer.InterfaceInstance, | |
158 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
159 | sizeof(struct hv_guid))) { | |
0e727613 | 160 | fNew = false; |
3e7ee490 HJ |
161 | break; |
162 | } | |
163 | } | |
164 | ||
165 | if (fNew) | |
bd60c33e GKH |
166 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelList, |
167 | &newChannel->ListEntry); | |
168 | ||
0f5e44ca | 169 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 170 | |
bd60c33e GKH |
171 | if (!fNew) { |
172 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", | |
173 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 HJ |
174 | FreeVmbusChannel(newChannel); |
175 | DPRINT_EXIT(VMBUS); | |
176 | return; | |
177 | } | |
178 | ||
bd60c33e GKH |
179 | /* |
180 | * Start the process of binding this offer to the driver | |
181 | * We need to set the DeviceObject field before calling | |
182 | * VmbusChildDeviceAdd() | |
183 | */ | |
3e7ee490 | 184 | newChannel->DeviceObject = VmbusChildDeviceCreate( |
daaa8cc3 GKH |
185 | &newChannel->OfferMsg.Offer.InterfaceType, |
186 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
3e7ee490 HJ |
187 | newChannel); |
188 | ||
bd60c33e GKH |
189 | DPRINT_DBG(VMBUS, "child device object allocated - %p", |
190 | newChannel->DeviceObject); | |
3e7ee490 | 191 | |
454f18a9 BP |
192 | /* |
193 | * Add the new device to the bus. This will kick off device-driver | |
194 | * binding which eventually invokes the device driver's AddDevice() | |
195 | * method. | |
196 | */ | |
3e7ee490 | 197 | ret = VmbusChildDeviceAdd(newChannel->DeviceObject); |
bd60c33e GKH |
198 | if (ret != 0) { |
199 | DPRINT_ERR(VMBUS, | |
200 | "unable to add child device object (relid %d)", | |
201 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 | 202 | |
0f5e44ca | 203 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 204 | REMOVE_ENTRY_LIST(&newChannel->ListEntry); |
0f5e44ca | 205 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
206 | |
207 | FreeVmbusChannel(newChannel); | |
bd60c33e | 208 | } else { |
454f18a9 BP |
209 | /* |
210 | * This state is used to indicate a successful open | |
211 | * so that when we do close the channel normally, we | |
212 | * can cleanup properly | |
213 | */ | |
3e7ee490 HJ |
214 | newChannel->State = CHANNEL_OPEN_STATE; |
215 | } | |
216 | DPRINT_EXIT(VMBUS); | |
217 | } | |
218 | ||
bd60c33e GKH |
219 | /** |
220 | * VmbusChannelProcessRescindOffer - Rescind the offer by initiating a device removal | |
221 | */ | |
222 | static void VmbusChannelProcessRescindOffer(void *context) | |
3e7ee490 | 223 | { |
aded7165 | 224 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
225 | |
226 | DPRINT_ENTER(VMBUS); | |
3e7ee490 | 227 | VmbusChildDeviceRemove(channel->DeviceObject); |
3e7ee490 HJ |
228 | DPRINT_EXIT(VMBUS); |
229 | } | |
230 | ||
bd60c33e GKH |
231 | /** |
232 | * VmbusChannelOnOffer - Handler for channel offers from vmbus in parent partition. | |
233 | * | |
234 | * We ignore all offers except network and storage offers. For each network and | |
235 | * storage offers, we create a channel object and queue a work item to the | |
236 | * channel object to process the offer synchronously | |
237 | */ | |
82250213 | 238 | static void VmbusChannelOnOffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 239 | { |
bd60c33e | 240 | struct vmbus_channel_offer_channel *offer; |
aded7165 | 241 | struct vmbus_channel *newChannel; |
caf26a31 GKH |
242 | struct hv_guid *guidType; |
243 | struct hv_guid *guidInstance; | |
3e7ee490 | 244 | int i; |
bd60c33e | 245 | int fSupported = 0; |
3e7ee490 HJ |
246 | |
247 | DPRINT_ENTER(VMBUS); | |
248 | ||
bd60c33e GKH |
249 | offer = (struct vmbus_channel_offer_channel *)hdr; |
250 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
251 | if (memcmp(&offer->Offer.InterfaceType, | |
252 | &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { | |
3e7ee490 HJ |
253 | fSupported = 1; |
254 | break; | |
255 | } | |
256 | } | |
257 | ||
bd60c33e GKH |
258 | if (!fSupported) { |
259 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " | |
260 | "child relid %d", offer->ChildRelId); | |
3e7ee490 | 261 | DPRINT_EXIT(VMBUS); |
3e7ee490 HJ |
262 | return; |
263 | } | |
264 | ||
265 | guidType = &offer->Offer.InterfaceType; | |
266 | guidInstance = &offer->Offer.InterfaceInstance; | |
267 | ||
bd60c33e GKH |
268 | DPRINT_INFO(VMBUS, "Channel offer notification - " |
269 | "child relid %d monitor id %d allocated %d, " | |
270 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
271 | "%02x%02x%02x%02x%02x%02x%02x%02x} " | |
272 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
273 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
274 | offer->ChildRelId, offer->MonitorId, | |
275 | offer->MonitorAllocated, | |
276 | guidType->data[3], guidType->data[2], | |
277 | guidType->data[1], guidType->data[0], | |
278 | guidType->data[5], guidType->data[4], | |
279 | guidType->data[7], guidType->data[6], | |
280 | guidType->data[8], guidType->data[9], | |
281 | guidType->data[10], guidType->data[11], | |
282 | guidType->data[12], guidType->data[13], | |
283 | guidType->data[14], guidType->data[15], | |
284 | guidInstance->data[3], guidInstance->data[2], | |
285 | guidInstance->data[1], guidInstance->data[0], | |
286 | guidInstance->data[5], guidInstance->data[4], | |
287 | guidInstance->data[7], guidInstance->data[6], | |
288 | guidInstance->data[8], guidInstance->data[9], | |
289 | guidInstance->data[10], guidInstance->data[11], | |
290 | guidInstance->data[12], guidInstance->data[13], | |
291 | guidInstance->data[14], guidInstance->data[15]); | |
3e7ee490 | 292 | |
454f18a9 | 293 | /* Allocate the channel object and save this offer. */ |
3e7ee490 | 294 | newChannel = AllocVmbusChannel(); |
bd60c33e | 295 | if (!newChannel) { |
3e7ee490 HJ |
296 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); |
297 | return; | |
298 | } | |
299 | ||
300 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newChannel); | |
301 | ||
bd60c33e GKH |
302 | memcpy(&newChannel->OfferMsg, offer, |
303 | sizeof(struct vmbus_channel_offer_channel)); | |
5654e932 GKH |
304 | newChannel->MonitorGroup = (u8)offer->MonitorId / 32; |
305 | newChannel->MonitorBit = (u8)offer->MonitorId % 32; | |
3e7ee490 | 306 | |
454f18a9 | 307 | /* TODO: Make sure the offer comes from our parent partition */ |
de65a384 BP |
308 | osd_schedule_callback(newChannel->ControlWQ, VmbusChannelProcessOffer, |
309 | newChannel); | |
3e7ee490 HJ |
310 | |
311 | DPRINT_EXIT(VMBUS); | |
312 | } | |
313 | ||
bd60c33e GKH |
314 | /** |
315 | * VmbusChannelOnOfferRescind - Rescind offer handler. | |
316 | * | |
317 | * We queue a work item to process this offer synchronously | |
318 | */ | |
82250213 | 319 | static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 320 | { |
bd60c33e | 321 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 322 | struct vmbus_channel *channel; |
3e7ee490 HJ |
323 | |
324 | DPRINT_ENTER(VMBUS); | |
325 | ||
bd60c33e | 326 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
3e7ee490 | 327 | channel = GetChannelFromRelId(rescind->ChildRelId); |
bd60c33e GKH |
328 | if (channel == NULL) { |
329 | DPRINT_DBG(VMBUS, "channel not found for relId %d", | |
330 | rescind->ChildRelId); | |
3e7ee490 HJ |
331 | return; |
332 | } | |
333 | ||
de65a384 BP |
334 | osd_schedule_callback(channel->ControlWQ, |
335 | VmbusChannelProcessRescindOffer, | |
336 | channel); | |
3e7ee490 HJ |
337 | |
338 | DPRINT_EXIT(VMBUS); | |
339 | } | |
340 | ||
bd60c33e GKH |
341 | /** |
342 | * VmbusChannelOnOffersDelivered - This is invoked when all offers have been delivered. | |
343 | * | |
344 | * Nothing to do here. | |
345 | */ | |
346 | static void VmbusChannelOnOffersDelivered( | |
347 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 HJ |
348 | { |
349 | DPRINT_ENTER(VMBUS); | |
350 | DPRINT_EXIT(VMBUS); | |
351 | } | |
352 | ||
bd60c33e GKH |
353 | /** |
354 | * VmbusChannelOnOpenResult - Open result handler. | |
355 | * | |
356 | * This is invoked when we received a response to our channel open request. | |
357 | * Find the matching request, copy the response and signal the requesting | |
358 | * thread. | |
359 | */ | |
82250213 | 360 | static void VmbusChannelOnOpenResult(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 361 | { |
bd60c33e GKH |
362 | struct vmbus_channel_open_result *result; |
363 | LIST_ENTRY *anchor; | |
364 | LIST_ENTRY *curr; | |
aded7165 | 365 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
366 | struct vmbus_channel_message_header *requestHeader; |
367 | struct vmbus_channel_open_channel *openMsg; | |
dd0813b6 | 368 | unsigned long flags; |
3e7ee490 HJ |
369 | |
370 | DPRINT_ENTER(VMBUS); | |
371 | ||
bd60c33e | 372 | result = (struct vmbus_channel_open_result *)hdr; |
3e7ee490 HJ |
373 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status); |
374 | ||
bd60c33e GKH |
375 | /* |
376 | * Find the open msg, copy the result and signal/unblock the wait event | |
377 | */ | |
dd0813b6 | 378 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 379 | |
bd60c33e | 380 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) { |
aded7165 | 381 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 382 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 383 | |
bd60c33e | 384 | if (requestHeader->MessageType == ChannelMessageOpenChannel) { |
82250213 | 385 | openMsg = (struct vmbus_channel_open_channel *)msgInfo->Msg; |
3e7ee490 | 386 | if (openMsg->ChildRelId == result->ChildRelId && |
bd60c33e GKH |
387 | openMsg->OpenId == result->OpenId) { |
388 | memcpy(&msgInfo->Response.OpenResult, | |
389 | result, | |
390 | sizeof(struct vmbus_channel_open_result)); | |
bfc30aae | 391 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
392 | break; |
393 | } | |
394 | } | |
395 | } | |
dd0813b6 | 396 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
397 | |
398 | DPRINT_EXIT(VMBUS); | |
399 | } | |
400 | ||
bd60c33e GKH |
401 | /** |
402 | * VmbusChannelOnGpadlCreated - GPADL created handler. | |
403 | * | |
404 | * This is invoked when we received a response to our gpadl create request. | |
405 | * Find the matching request, copy the response and signal the requesting | |
406 | * thread. | |
407 | */ | |
82250213 | 408 | static void VmbusChannelOnGpadlCreated(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 409 | { |
bd60c33e | 410 | struct vmbus_channel_gpadl_created *gpadlCreated; |
3e7ee490 HJ |
411 | LIST_ENTRY *anchor; |
412 | LIST_ENTRY *curr; | |
aded7165 | 413 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
414 | struct vmbus_channel_message_header *requestHeader; |
415 | struct vmbus_channel_gpadl_header *gpadlHeader; | |
dd0813b6 | 416 | unsigned long flags; |
3e7ee490 HJ |
417 | |
418 | DPRINT_ENTER(VMBUS); | |
419 | ||
bd60c33e GKH |
420 | gpadlCreated = (struct vmbus_channel_gpadl_created *)hdr; |
421 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", | |
422 | gpadlCreated->CreationStatus); | |
3e7ee490 | 423 | |
bd60c33e GKH |
424 | /* |
425 | * Find the establish msg, copy the result and signal/unblock the wait | |
426 | * event | |
427 | */ | |
dd0813b6 | 428 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 429 | |
bd60c33e | 430 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) { |
aded7165 | 431 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 432 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 433 | |
bd60c33e | 434 | if (requestHeader->MessageType == ChannelMessageGpadlHeader) { |
82250213 | 435 | gpadlHeader = (struct vmbus_channel_gpadl_header *)requestHeader; |
3e7ee490 | 436 | |
bd60c33e GKH |
437 | if ((gpadlCreated->ChildRelId == |
438 | gpadlHeader->ChildRelId) && | |
439 | (gpadlCreated->Gpadl == gpadlHeader->Gpadl)) { | |
440 | memcpy(&msgInfo->Response.GpadlCreated, | |
441 | gpadlCreated, | |
442 | sizeof(struct vmbus_channel_gpadl_created)); | |
bfc30aae | 443 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
444 | break; |
445 | } | |
446 | } | |
447 | } | |
dd0813b6 | 448 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
449 | |
450 | DPRINT_EXIT(VMBUS); | |
451 | } | |
452 | ||
bd60c33e GKH |
453 | /** |
454 | * VmbusChannelOnGpadlTorndown - GPADL torndown handler. | |
455 | * | |
456 | * This is invoked when we received a response to our gpadl teardown request. | |
457 | * Find the matching request, copy the response and signal the requesting | |
458 | * thread. | |
459 | */ | |
460 | static void VmbusChannelOnGpadlTorndown( | |
461 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 462 | { |
bd60c33e GKH |
463 | struct vmbus_channel_gpadl_torndown *gpadlTorndown; |
464 | LIST_ENTRY *anchor; | |
465 | LIST_ENTRY *curr; | |
aded7165 | 466 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
467 | struct vmbus_channel_message_header *requestHeader; |
468 | struct vmbus_channel_gpadl_teardown *gpadlTeardown; | |
dd0813b6 | 469 | unsigned long flags; |
3e7ee490 HJ |
470 | |
471 | DPRINT_ENTER(VMBUS); | |
472 | ||
bd60c33e GKH |
473 | gpadlTorndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
474 | ||
475 | /* | |
476 | * Find the open msg, copy the result and signal/unblock the wait event | |
477 | */ | |
dd0813b6 | 478 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 479 | |
bd60c33e | 480 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) { |
aded7165 | 481 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 482 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 483 | |
bd60c33e | 484 | if (requestHeader->MessageType == ChannelMessageGpadlTeardown) { |
82250213 | 485 | gpadlTeardown = (struct vmbus_channel_gpadl_teardown *)requestHeader; |
3e7ee490 | 486 | |
bd60c33e GKH |
487 | if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl) { |
488 | memcpy(&msgInfo->Response.GpadlTorndown, | |
489 | gpadlTorndown, | |
490 | sizeof(struct vmbus_channel_gpadl_torndown)); | |
bfc30aae | 491 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
492 | break; |
493 | } | |
494 | } | |
495 | } | |
dd0813b6 | 496 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
497 | |
498 | DPRINT_EXIT(VMBUS); | |
499 | } | |
500 | ||
bd60c33e GKH |
501 | /** |
502 | * VmbusChannelOnVersionResponse - Version response handler | |
503 | * | |
504 | * This is invoked when we received a response to our initiate contact request. | |
505 | * Find the matching request, copy the response and signal the requesting | |
506 | * thread. | |
507 | */ | |
508 | static void VmbusChannelOnVersionResponse( | |
509 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 510 | { |
bd60c33e GKH |
511 | LIST_ENTRY *anchor; |
512 | LIST_ENTRY *curr; | |
aded7165 | 513 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
514 | struct vmbus_channel_message_header *requestHeader; |
515 | struct vmbus_channel_initiate_contact *initiate; | |
bd60c33e | 516 | struct vmbus_channel_version_response *versionResponse; |
dd0813b6 | 517 | unsigned long flags; |
3e7ee490 HJ |
518 | |
519 | DPRINT_ENTER(VMBUS); | |
520 | ||
bd60c33e | 521 | versionResponse = (struct vmbus_channel_version_response *)hdr; |
dd0813b6 | 522 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 523 | |
bd60c33e | 524 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) { |
aded7165 | 525 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 526 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 527 | |
bd60c33e GKH |
528 | if (requestHeader->MessageType == |
529 | ChannelMessageInitiateContact) { | |
82250213 | 530 | initiate = (struct vmbus_channel_initiate_contact *)requestHeader; |
bd60c33e GKH |
531 | memcpy(&msgInfo->Response.VersionResponse, |
532 | versionResponse, | |
533 | sizeof(struct vmbus_channel_version_response)); | |
bfc30aae | 534 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
535 | } |
536 | } | |
dd0813b6 | 537 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
538 | |
539 | DPRINT_EXIT(VMBUS); | |
540 | } | |
541 | ||
c8212f04 GKH |
542 | /* Channel message dispatch table */ |
543 | static struct vmbus_channel_message_table_entry | |
544 | gChannelMessageTable[ChannelMessageCount] = { | |
545 | {ChannelMessageInvalid, NULL}, | |
546 | {ChannelMessageOfferChannel, VmbusChannelOnOffer}, | |
547 | {ChannelMessageRescindChannelOffer, VmbusChannelOnOfferRescind}, | |
548 | {ChannelMessageRequestOffers, NULL}, | |
549 | {ChannelMessageAllOffersDelivered, VmbusChannelOnOffersDelivered}, | |
550 | {ChannelMessageOpenChannel, NULL}, | |
551 | {ChannelMessageOpenChannelResult, VmbusChannelOnOpenResult}, | |
552 | {ChannelMessageCloseChannel, NULL}, | |
553 | {ChannelMessageGpadlHeader, NULL}, | |
554 | {ChannelMessageGpadlBody, NULL}, | |
555 | {ChannelMessageGpadlCreated, VmbusChannelOnGpadlCreated}, | |
556 | {ChannelMessageGpadlTeardown, NULL}, | |
557 | {ChannelMessageGpadlTorndown, VmbusChannelOnGpadlTorndown}, | |
558 | {ChannelMessageRelIdReleased, NULL}, | |
559 | {ChannelMessageInitiateContact, NULL}, | |
560 | {ChannelMessageVersionResponse, VmbusChannelOnVersionResponse}, | |
561 | {ChannelMessageUnload, NULL}, | |
562 | }; | |
563 | ||
bd60c33e GKH |
564 | /** |
565 | * VmbusOnChannelMessage - Handler for channel protocol messages. | |
566 | * | |
567 | * This is invoked in the vmbus worker thread context. | |
568 | */ | |
b239549c | 569 | void VmbusOnChannelMessage(void *Context) |
3e7ee490 | 570 | { |
eacb1b4d | 571 | struct hv_message *msg = Context; |
82250213 | 572 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
573 | int size; |
574 | ||
575 | DPRINT_ENTER(VMBUS); | |
576 | ||
82250213 | 577 | hdr = (struct vmbus_channel_message_header *)msg->u.Payload; |
bd60c33e | 578 | size = msg->Header.PayloadSize; |
3e7ee490 HJ |
579 | |
580 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->MessageType, size); | |
581 | ||
bd60c33e GKH |
582 | if (hdr->MessageType >= ChannelMessageCount) { |
583 | DPRINT_ERR(VMBUS, | |
584 | "Received invalid channel message type %d size %d", | |
585 | hdr->MessageType, size); | |
04f50c4d GKH |
586 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
587 | (unsigned char *)msg->u.Payload, size); | |
8c69f52a | 588 | kfree(msg); |
3e7ee490 HJ |
589 | return; |
590 | } | |
591 | ||
592 | if (gChannelMessageTable[hdr->MessageType].messageHandler) | |
3e7ee490 | 593 | gChannelMessageTable[hdr->MessageType].messageHandler(hdr); |
3e7ee490 | 594 | else |
bd60c33e GKH |
595 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", |
596 | hdr->MessageType); | |
3e7ee490 | 597 | |
454f18a9 | 598 | /* Free the msg that was allocated in VmbusOnMsgDPC() */ |
8c69f52a | 599 | kfree(msg); |
3e7ee490 HJ |
600 | DPRINT_EXIT(VMBUS); |
601 | } | |
602 | ||
bd60c33e GKH |
603 | /** |
604 | * VmbusChannelRequestOffers - Send a request to get all our pending offers. | |
605 | */ | |
b239549c | 606 | int VmbusChannelRequestOffers(void) |
3e7ee490 | 607 | { |
82250213 | 608 | struct vmbus_channel_message_header *msg; |
aded7165 | 609 | struct vmbus_channel_msginfo *msgInfo; |
bd60c33e | 610 | int ret; |
3e7ee490 HJ |
611 | |
612 | DPRINT_ENTER(VMBUS); | |
613 | ||
bd60c33e GKH |
614 | msgInfo = kmalloc(sizeof(*msgInfo) + |
615 | sizeof(struct vmbus_channel_message_header), | |
616 | GFP_KERNEL); | |
3e7ee490 HJ |
617 | ASSERT(msgInfo != NULL); |
618 | ||
bfc30aae | 619 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 620 | msg = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
621 | |
622 | msg->MessageType = ChannelMessageRequestOffers; | |
623 | ||
624 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
bd60c33e GKH |
625 | INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, |
626 | &msgInfo->msgListEntry); | |
3e7ee490 HJ |
627 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ |
628 | ||
bd60c33e GKH |
629 | ret = VmbusPostMessage(msg, |
630 | sizeof(struct vmbus_channel_message_header)); | |
631 | if (ret != 0) { | |
3e7ee490 HJ |
632 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); |
633 | ||
634 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
635 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
636 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
637 | ||
638 | goto Cleanup; | |
639 | } | |
bfc30aae | 640 | /* osd_WaitEventWait(msgInfo->waitEvent); */ |
3e7ee490 HJ |
641 | |
642 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
643 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
644 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
645 | ||
646 | ||
647 | Cleanup: | |
bd60c33e | 648 | if (msgInfo) { |
420beac4 | 649 | kfree(msgInfo->WaitEvent); |
8c69f52a | 650 | kfree(msgInfo); |
3e7ee490 HJ |
651 | } |
652 | ||
653 | DPRINT_EXIT(VMBUS); | |
3e7ee490 HJ |
654 | return ret; |
655 | } | |
656 | ||
bd60c33e GKH |
657 | /** |
658 | * VmbusChannelReleaseUnattachedChannels - Release channels that are unattached/unconnected ie (no drivers associated) | |
659 | */ | |
b239549c | 660 | void VmbusChannelReleaseUnattachedChannels(void) |
3e7ee490 HJ |
661 | { |
662 | LIST_ENTRY *entry; | |
aded7165 GKH |
663 | struct vmbus_channel *channel; |
664 | struct vmbus_channel *start = NULL; | |
0f5e44ca | 665 | unsigned long flags; |
3e7ee490 | 666 | |
0f5e44ca | 667 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 668 | |
bd60c33e | 669 | while (!IsListEmpty(&gVmbusConnection.ChannelList)) { |
3e7ee490 | 670 | entry = TOP_LIST_ENTRY(&gVmbusConnection.ChannelList); |
bd60c33e GKH |
671 | channel = CONTAINING_RECORD(entry, struct vmbus_channel, |
672 | ListEntry); | |
3e7ee490 HJ |
673 | |
674 | if (channel == start) | |
675 | break; | |
676 | ||
bd60c33e | 677 | if (!channel->DeviceObject->Driver) { |
3e7ee490 | 678 | REMOVE_ENTRY_LIST(&channel->ListEntry); |
bd60c33e GKH |
679 | DPRINT_INFO(VMBUS, |
680 | "Releasing unattached device object %p", | |
681 | channel->DeviceObject); | |
3e7ee490 HJ |
682 | |
683 | VmbusChildDeviceRemove(channel->DeviceObject); | |
684 | FreeVmbusChannel(channel); | |
bd60c33e | 685 | } else { |
3e7ee490 | 686 | if (!start) |
3e7ee490 | 687 | start = channel; |
3e7ee490 HJ |
688 | } |
689 | } | |
690 | ||
0f5e44ca | 691 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
692 | } |
693 | ||
454f18a9 | 694 | /* eof */ |