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Commit | Line | Data |
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3e7ee490 HJ |
1 | /* |
2 | * | |
3 | * Copyright (c) 2009, Microsoft Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
17 | * | |
18 | * Authors: | |
19 | * Haiyang Zhang <haiyangz@microsoft.com> | |
20 | * Hank Janssen <hjanssen@microsoft.com> | |
21 | * | |
22 | */ | |
23 | ||
24 | ||
a0086dc5 GKH |
25 | #include <linux/kernel.h> |
26 | #include <linux/mm.h> | |
4983b39a | 27 | #include "osd.h" |
09d50ff8 | 28 | #include "include/logging.h" |
3e7ee490 HJ |
29 | |
30 | #include "VmbusPrivate.h" | |
31 | ||
454f18a9 | 32 | /* Data types */ |
3e7ee490 | 33 | |
82250213 | 34 | typedef void (*PFN_CHANNEL_MESSAGE_HANDLER)(struct vmbus_channel_message_header *msg); |
3e7ee490 HJ |
35 | |
36 | typedef struct _VMBUS_CHANNEL_MESSAGE_TABLE_ENTRY { | |
82250213 | 37 | enum vmbus_channel_message_type messageType; |
3e7ee490 HJ |
38 | PFN_CHANNEL_MESSAGE_HANDLER messageHandler; |
39 | } VMBUS_CHANNEL_MESSAGE_TABLE_ENTRY; | |
40 | ||
454f18a9 | 41 | /* Internal routines */ |
82250213 GKH |
42 | static void VmbusChannelOnOffer(struct vmbus_channel_message_header *hdr); |
43 | static void VmbusChannelOnOpenResult(struct vmbus_channel_message_header *hdr); | |
44 | static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr); | |
45 | static void VmbusChannelOnGpadlCreated(struct vmbus_channel_message_header *hdr); | |
46 | static void VmbusChannelOnGpadlTorndown(struct vmbus_channel_message_header *hdr); | |
47 | static void VmbusChannelOnOffersDelivered(struct vmbus_channel_message_header *hdr); | |
48 | static void VmbusChannelOnVersionResponse(struct vmbus_channel_message_header *hdr); | |
49 | static void VmbusChannelProcessOffer(void * context); | |
50 | static void VmbusChannelProcessRescindOffer(void * context); | |
3e7ee490 HJ |
51 | |
52 | ||
454f18a9 | 53 | /* Globals */ |
3e7ee490 HJ |
54 | |
55 | #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 4 | |
56 | ||
caf26a31 | 57 | static const struct hv_guid gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = { |
454f18a9 | 58 | /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ |
caf26a31 GKH |
59 | /* Storage - SCSI */ |
60 | { | |
61 | .data = { | |
62 | 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
63 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f | |
64 | } | |
65 | }, | |
66 | ||
454f18a9 | 67 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
caf26a31 GKH |
68 | /* Network */ |
69 | { | |
70 | .data = { | |
71 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
72 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
73 | } | |
74 | }, | |
75 | ||
454f18a9 | 76 | /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */ |
caf26a31 GKH |
77 | /* Input */ |
78 | { | |
79 | .data = { | |
80 | 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, | |
81 | 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A | |
82 | } | |
83 | }, | |
3e7ee490 | 84 | |
caf26a31 GKH |
85 | /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ |
86 | /* IDE */ | |
87 | { | |
88 | .data = { | |
89 | 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, | |
90 | 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 | |
91 | } | |
92 | }, | |
3e7ee490 HJ |
93 | }; |
94 | ||
454f18a9 | 95 | /* Channel message dispatch table */ |
bd1de709 | 96 | static VMBUS_CHANNEL_MESSAGE_TABLE_ENTRY gChannelMessageTable[ChannelMessageCount]= { |
3e7ee490 HJ |
97 | {ChannelMessageInvalid, NULL}, |
98 | {ChannelMessageOfferChannel, VmbusChannelOnOffer}, | |
99 | {ChannelMessageRescindChannelOffer, VmbusChannelOnOfferRescind}, | |
100 | {ChannelMessageRequestOffers, NULL}, | |
101 | {ChannelMessageAllOffersDelivered, VmbusChannelOnOffersDelivered}, | |
102 | {ChannelMessageOpenChannel, NULL}, | |
103 | {ChannelMessageOpenChannelResult, VmbusChannelOnOpenResult}, | |
104 | {ChannelMessageCloseChannel, NULL}, | |
105 | {ChannelMessageGpadlHeader, NULL}, | |
106 | {ChannelMessageGpadlBody, NULL}, | |
107 | {ChannelMessageGpadlCreated, VmbusChannelOnGpadlCreated}, | |
108 | {ChannelMessageGpadlTeardown, NULL}, | |
109 | {ChannelMessageGpadlTorndown, VmbusChannelOnGpadlTorndown}, | |
110 | {ChannelMessageRelIdReleased, NULL}, | |
111 | {ChannelMessageInitiateContact, NULL}, | |
112 | {ChannelMessageVersionResponse, VmbusChannelOnVersionResponse}, | |
113 | {ChannelMessageUnload, NULL}, | |
114 | }; | |
115 | ||
116 | /*++ | |
117 | ||
118 | Name: | |
119 | AllocVmbusChannel() | |
120 | ||
121 | Description: | |
122 | Allocate and initialize a vmbus channel object | |
123 | ||
124 | --*/ | |
aded7165 | 125 | struct vmbus_channel *AllocVmbusChannel(void) |
3e7ee490 | 126 | { |
aded7165 | 127 | struct vmbus_channel *channel; |
3e7ee490 | 128 | |
aded7165 | 129 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
3e7ee490 HJ |
130 | if (!channel) |
131 | { | |
132 | return NULL; | |
133 | } | |
134 | ||
54411c42 | 135 | spin_lock_init(&channel->inbound_lock); |
3e7ee490 | 136 | |
c8a429a4 GKH |
137 | init_timer(&channel->poll_timer); |
138 | channel->poll_timer.data = (unsigned long)channel; | |
139 | channel->poll_timer.function = VmbusChannelOnTimer; | |
3e7ee490 | 140 | |
454f18a9 | 141 | /* channel->dataWorkQueue = WorkQueueCreate("data"); */ |
de65a384 | 142 | channel->ControlWQ = create_workqueue("hv_vmbus_ctl"); |
3e7ee490 HJ |
143 | if (!channel->ControlWQ) |
144 | { | |
8c69f52a | 145 | kfree(channel); |
3e7ee490 HJ |
146 | return NULL; |
147 | } | |
148 | ||
149 | return channel; | |
150 | } | |
151 | ||
152 | /*++ | |
153 | ||
154 | Name: | |
155 | ReleaseVmbusChannel() | |
156 | ||
157 | Description: | |
158 | Release the vmbus channel object itself | |
159 | ||
160 | --*/ | |
161 | static inline void ReleaseVmbusChannel(void* Context) | |
162 | { | |
aded7165 | 163 | struct vmbus_channel *channel = Context; |
3e7ee490 HJ |
164 | |
165 | DPRINT_ENTER(VMBUS); | |
166 | ||
167 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); | |
de65a384 | 168 | destroy_workqueue(channel->ControlWQ); |
3e7ee490 HJ |
169 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
170 | ||
8c69f52a | 171 | kfree(channel); |
3e7ee490 HJ |
172 | |
173 | DPRINT_EXIT(VMBUS); | |
174 | } | |
175 | ||
176 | /*++ | |
177 | ||
178 | Name: | |
179 | FreeVmbusChannel() | |
180 | ||
181 | Description: | |
182 | Release the resources used by the vmbus channel object | |
183 | ||
184 | --*/ | |
aded7165 | 185 | void FreeVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 | 186 | { |
c8a429a4 | 187 | del_timer(&Channel->poll_timer); |
3e7ee490 | 188 | |
454f18a9 BP |
189 | /* We have to release the channel's workqueue/thread in the vmbus's workqueue/thread context */ |
190 | /* ie we can't destroy ourselves. */ | |
de65a384 BP |
191 | osd_schedule_callback(gVmbusConnection.WorkQueue, ReleaseVmbusChannel, |
192 | (void *)Channel); | |
3e7ee490 HJ |
193 | } |
194 | ||
195 | ||
196 | /*++ | |
197 | ||
198 | Name: | |
199 | VmbusChannelProcessOffer() | |
200 | ||
201 | Description: | |
202 | Process the offer by creating a channel/device associated with this offer | |
203 | ||
204 | --*/ | |
205 | static void | |
206 | VmbusChannelProcessOffer( | |
8282c400 | 207 | void * context |
3e7ee490 HJ |
208 | ) |
209 | { | |
210 | int ret=0; | |
aded7165 GKH |
211 | struct vmbus_channel *newChannel = context; |
212 | struct vmbus_channel *channel; | |
3e7ee490 HJ |
213 | LIST_ENTRY* anchor; |
214 | LIST_ENTRY* curr; | |
0e727613 | 215 | bool fNew = true; |
0f5e44ca | 216 | unsigned long flags; |
3e7ee490 HJ |
217 | |
218 | DPRINT_ENTER(VMBUS); | |
219 | ||
454f18a9 | 220 | /* Make sure this is a new offer */ |
0f5e44ca | 221 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
222 | |
223 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelList) | |
224 | { | |
aded7165 | 225 | channel = CONTAINING_RECORD(curr, struct vmbus_channel, ListEntry); |
3e7ee490 | 226 | |
caf26a31 GKH |
227 | if (!memcmp(&channel->OfferMsg.Offer.InterfaceType, &newChannel->OfferMsg.Offer.InterfaceType,sizeof(struct hv_guid)) && |
228 | !memcmp(&channel->OfferMsg.Offer.InterfaceInstance, &newChannel->OfferMsg.Offer.InterfaceInstance, sizeof(struct hv_guid))) | |
3e7ee490 | 229 | { |
0e727613 | 230 | fNew = false; |
3e7ee490 HJ |
231 | break; |
232 | } | |
233 | } | |
234 | ||
235 | if (fNew) | |
236 | { | |
237 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelList, &newChannel->ListEntry); | |
238 | } | |
0f5e44ca | 239 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
240 | |
241 | if (!fNew) | |
242 | { | |
243 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", newChannel->OfferMsg.ChildRelId); | |
244 | FreeVmbusChannel(newChannel); | |
245 | DPRINT_EXIT(VMBUS); | |
246 | return; | |
247 | } | |
248 | ||
454f18a9 BP |
249 | /* Start the process of binding this offer to the driver */ |
250 | /* We need to set the DeviceObject field before calling VmbusChildDeviceAdd() */ | |
3e7ee490 | 251 | newChannel->DeviceObject = VmbusChildDeviceCreate( |
daaa8cc3 GKH |
252 | &newChannel->OfferMsg.Offer.InterfaceType, |
253 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
3e7ee490 HJ |
254 | newChannel); |
255 | ||
256 | DPRINT_DBG(VMBUS, "child device object allocated - %p", newChannel->DeviceObject); | |
257 | ||
454f18a9 BP |
258 | /* |
259 | * Add the new device to the bus. This will kick off device-driver | |
260 | * binding which eventually invokes the device driver's AddDevice() | |
261 | * method. | |
262 | */ | |
263 | ||
3e7ee490 HJ |
264 | ret = VmbusChildDeviceAdd(newChannel->DeviceObject); |
265 | if (ret != 0) | |
266 | { | |
267 | DPRINT_ERR(VMBUS, "unable to add child device object (relid %d)", | |
268 | newChannel->OfferMsg.ChildRelId); | |
269 | ||
0f5e44ca | 270 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 271 | REMOVE_ENTRY_LIST(&newChannel->ListEntry); |
0f5e44ca | 272 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
273 | |
274 | FreeVmbusChannel(newChannel); | |
275 | } | |
276 | else | |
277 | { | |
454f18a9 BP |
278 | /* |
279 | * This state is used to indicate a successful open | |
280 | * so that when we do close the channel normally, we | |
281 | * can cleanup properly | |
282 | */ | |
3e7ee490 HJ |
283 | newChannel->State = CHANNEL_OPEN_STATE; |
284 | } | |
285 | DPRINT_EXIT(VMBUS); | |
286 | } | |
287 | ||
288 | /*++ | |
289 | ||
290 | Name: | |
291 | VmbusChannelProcessRescindOffer() | |
292 | ||
293 | Description: | |
294 | Rescind the offer by initiating a device removal | |
295 | ||
296 | --*/ | |
297 | static void | |
298 | VmbusChannelProcessRescindOffer( | |
8282c400 | 299 | void * context |
3e7ee490 HJ |
300 | ) |
301 | { | |
aded7165 | 302 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
303 | |
304 | DPRINT_ENTER(VMBUS); | |
305 | ||
306 | VmbusChildDeviceRemove(channel->DeviceObject); | |
307 | ||
308 | DPRINT_EXIT(VMBUS); | |
309 | } | |
310 | ||
311 | ||
312 | /*++ | |
313 | ||
314 | Name: | |
315 | VmbusChannelOnOffer() | |
316 | ||
317 | Description: | |
318 | Handler for channel offers from vmbus in parent partition. We ignore all offers except | |
319 | network and storage offers. For each network and storage offers, we create a channel object | |
320 | and queue a work item to the channel object to process the offer synchronously | |
321 | ||
322 | --*/ | |
82250213 | 323 | static void VmbusChannelOnOffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 324 | { |
82250213 | 325 | struct vmbus_channel_offer_channel *offer = (struct vmbus_channel_offer_channel *)hdr; |
aded7165 | 326 | struct vmbus_channel *newChannel; |
3e7ee490 | 327 | |
caf26a31 GKH |
328 | struct hv_guid *guidType; |
329 | struct hv_guid *guidInstance; | |
3e7ee490 HJ |
330 | int i; |
331 | int fSupported=0; | |
332 | ||
333 | DPRINT_ENTER(VMBUS); | |
334 | ||
335 | for (i=0; i<MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) | |
336 | { | |
caf26a31 | 337 | if (memcmp(&offer->Offer.InterfaceType, &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) |
3e7ee490 HJ |
338 | { |
339 | fSupported = 1; | |
340 | break; | |
341 | } | |
342 | } | |
343 | ||
344 | if (!fSupported) | |
345 | { | |
346 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for child relid %d", offer->ChildRelId); | |
347 | DPRINT_EXIT(VMBUS); | |
348 | ||
349 | return; | |
350 | } | |
351 | ||
352 | guidType = &offer->Offer.InterfaceType; | |
353 | guidInstance = &offer->Offer.InterfaceInstance; | |
354 | ||
355 | DPRINT_INFO(VMBUS, "Channel offer notification - child relid %d monitor id %d allocated %d, " | |
356 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x} " | |
357 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}", | |
358 | offer->ChildRelId, | |
359 | offer->MonitorId, | |
360 | offer->MonitorAllocated, | |
caf26a31 GKH |
361 | guidType->data[3], guidType->data[2], guidType->data[1], guidType->data[0], |
362 | guidType->data[5], guidType->data[4], guidType->data[7], guidType->data[6], | |
363 | guidType->data[8], guidType->data[9], guidType->data[10], guidType->data[11], | |
364 | guidType->data[12], guidType->data[13], guidType->data[14], guidType->data[15], | |
365 | guidInstance->data[3], guidInstance->data[2], guidInstance->data[1], guidInstance->data[0], | |
366 | guidInstance->data[5], guidInstance->data[4], guidInstance->data[7], guidInstance->data[6], | |
367 | guidInstance->data[8], guidInstance->data[9], guidInstance->data[10], guidInstance->data[11], | |
368 | guidInstance->data[12], guidInstance->data[13], guidInstance->data[14], guidInstance->data[15]); | |
3e7ee490 | 369 | |
454f18a9 | 370 | /* Allocate the channel object and save this offer. */ |
3e7ee490 HJ |
371 | newChannel = AllocVmbusChannel(); |
372 | if (!newChannel) | |
373 | { | |
374 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); | |
375 | return; | |
376 | } | |
377 | ||
378 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newChannel); | |
379 | ||
82250213 | 380 | memcpy(&newChannel->OfferMsg, offer, sizeof(struct vmbus_channel_offer_channel)); |
5654e932 GKH |
381 | newChannel->MonitorGroup = (u8)offer->MonitorId / 32; |
382 | newChannel->MonitorBit = (u8)offer->MonitorId % 32; | |
3e7ee490 | 383 | |
454f18a9 | 384 | /* TODO: Make sure the offer comes from our parent partition */ |
de65a384 BP |
385 | osd_schedule_callback(newChannel->ControlWQ, VmbusChannelProcessOffer, |
386 | newChannel); | |
3e7ee490 HJ |
387 | |
388 | DPRINT_EXIT(VMBUS); | |
389 | } | |
390 | ||
391 | ||
392 | /*++ | |
393 | ||
394 | Name: | |
395 | VmbusChannelOnOfferRescind() | |
396 | ||
397 | Description: | |
398 | Rescind offer handler. We queue a work item to process this offer | |
399 | synchronously | |
400 | ||
401 | --*/ | |
82250213 | 402 | static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 403 | { |
82250213 | 404 | struct vmbus_channel_rescind_offer *rescind = (struct vmbus_channel_rescind_offer *)hdr; |
aded7165 | 405 | struct vmbus_channel *channel; |
3e7ee490 HJ |
406 | |
407 | DPRINT_ENTER(VMBUS); | |
408 | ||
409 | channel = GetChannelFromRelId(rescind->ChildRelId); | |
410 | if (channel == NULL) | |
411 | { | |
412 | DPRINT_DBG(VMBUS, "channel not found for relId %d", rescind->ChildRelId); | |
413 | return; | |
414 | } | |
415 | ||
de65a384 BP |
416 | osd_schedule_callback(channel->ControlWQ, |
417 | VmbusChannelProcessRescindOffer, | |
418 | channel); | |
3e7ee490 HJ |
419 | |
420 | DPRINT_EXIT(VMBUS); | |
421 | } | |
422 | ||
423 | ||
424 | /*++ | |
425 | ||
426 | Name: | |
427 | VmbusChannelOnOffersDelivered() | |
428 | ||
429 | Description: | |
430 | This is invoked when all offers have been delivered. | |
431 | Nothing to do here. | |
432 | ||
433 | --*/ | |
82250213 | 434 | static void VmbusChannelOnOffersDelivered(struct vmbus_channel_message_header *hdr) |
3e7ee490 HJ |
435 | { |
436 | DPRINT_ENTER(VMBUS); | |
437 | DPRINT_EXIT(VMBUS); | |
438 | } | |
439 | ||
440 | ||
441 | /*++ | |
442 | ||
443 | Name: | |
444 | VmbusChannelOnOpenResult() | |
445 | ||
446 | Description: | |
447 | Open result handler. This is invoked when we received a response | |
448 | to our channel open request. Find the matching request, copy the | |
449 | response and signal the requesting thread. | |
450 | ||
451 | --*/ | |
82250213 | 452 | static void VmbusChannelOnOpenResult(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 453 | { |
82250213 | 454 | struct vmbus_channel_open_result *result = (struct vmbus_channel_open_result *)hdr; |
3e7ee490 HJ |
455 | LIST_ENTRY* anchor; |
456 | LIST_ENTRY* curr; | |
aded7165 | 457 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
458 | struct vmbus_channel_message_header *requestHeader; |
459 | struct vmbus_channel_open_channel *openMsg; | |
dd0813b6 | 460 | unsigned long flags; |
3e7ee490 HJ |
461 | |
462 | DPRINT_ENTER(VMBUS); | |
463 | ||
464 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status); | |
465 | ||
454f18a9 | 466 | /* Find the open msg, copy the result and signal/unblock the wait event */ |
dd0813b6 | 467 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
468 | |
469 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) | |
470 | { | |
aded7165 | 471 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 472 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
473 | |
474 | if (requestHeader->MessageType == ChannelMessageOpenChannel) | |
475 | { | |
82250213 | 476 | openMsg = (struct vmbus_channel_open_channel *)msgInfo->Msg; |
3e7ee490 HJ |
477 | if (openMsg->ChildRelId == result->ChildRelId && |
478 | openMsg->OpenId == result->OpenId) | |
479 | { | |
82250213 | 480 | memcpy(&msgInfo->Response.OpenResult, result, sizeof(struct vmbus_channel_open_result)); |
bfc30aae | 481 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
482 | break; |
483 | } | |
484 | } | |
485 | } | |
dd0813b6 | 486 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
487 | |
488 | DPRINT_EXIT(VMBUS); | |
489 | } | |
490 | ||
491 | ||
492 | /*++ | |
493 | ||
494 | Name: | |
495 | VmbusChannelOnGpadlCreated() | |
496 | ||
497 | Description: | |
498 | GPADL created handler. This is invoked when we received a response | |
499 | to our gpadl create request. Find the matching request, copy the | |
500 | response and signal the requesting thread. | |
501 | ||
502 | --*/ | |
82250213 | 503 | static void VmbusChannelOnGpadlCreated(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 504 | { |
82250213 | 505 | struct vmbus_channel_gpadl_created *gpadlCreated = (struct vmbus_channel_gpadl_created *)hdr; |
3e7ee490 HJ |
506 | LIST_ENTRY *anchor; |
507 | LIST_ENTRY *curr; | |
aded7165 | 508 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
509 | struct vmbus_channel_message_header *requestHeader; |
510 | struct vmbus_channel_gpadl_header *gpadlHeader; | |
dd0813b6 | 511 | unsigned long flags; |
3e7ee490 HJ |
512 | |
513 | DPRINT_ENTER(VMBUS); | |
514 | ||
515 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", gpadlCreated->CreationStatus); | |
516 | ||
454f18a9 | 517 | /* Find the establish msg, copy the result and signal/unblock the wait event */ |
dd0813b6 | 518 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
519 | |
520 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) | |
521 | { | |
aded7165 | 522 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 523 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
524 | |
525 | if (requestHeader->MessageType == ChannelMessageGpadlHeader) | |
526 | { | |
82250213 | 527 | gpadlHeader = (struct vmbus_channel_gpadl_header *)requestHeader; |
3e7ee490 HJ |
528 | |
529 | if ((gpadlCreated->ChildRelId == gpadlHeader->ChildRelId) && | |
530 | (gpadlCreated->Gpadl == gpadlHeader->Gpadl)) | |
531 | { | |
82250213 | 532 | memcpy(&msgInfo->Response.GpadlCreated, gpadlCreated, sizeof(struct vmbus_channel_gpadl_created)); |
bfc30aae | 533 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
534 | break; |
535 | } | |
536 | } | |
537 | } | |
dd0813b6 | 538 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
539 | |
540 | DPRINT_EXIT(VMBUS); | |
541 | } | |
542 | ||
543 | ||
544 | /*++ | |
545 | ||
546 | Name: | |
547 | VmbusChannelOnGpadlTorndown() | |
548 | ||
549 | Description: | |
550 | GPADL torndown handler. This is invoked when we received a response | |
551 | to our gpadl teardown request. Find the matching request, copy the | |
552 | response and signal the requesting thread. | |
553 | ||
554 | --*/ | |
82250213 | 555 | static void VmbusChannelOnGpadlTorndown(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 556 | { |
82250213 | 557 | struct vmbus_channel_gpadl_torndown* gpadlTorndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
3e7ee490 HJ |
558 | LIST_ENTRY* anchor; |
559 | LIST_ENTRY* curr; | |
aded7165 | 560 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
561 | struct vmbus_channel_message_header *requestHeader; |
562 | struct vmbus_channel_gpadl_teardown *gpadlTeardown; | |
dd0813b6 | 563 | unsigned long flags; |
3e7ee490 HJ |
564 | |
565 | DPRINT_ENTER(VMBUS); | |
566 | ||
454f18a9 | 567 | /* Find the open msg, copy the result and signal/unblock the wait event */ |
dd0813b6 | 568 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
569 | |
570 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) | |
571 | { | |
aded7165 | 572 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 573 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
574 | |
575 | if (requestHeader->MessageType == ChannelMessageGpadlTeardown) | |
576 | { | |
82250213 | 577 | gpadlTeardown = (struct vmbus_channel_gpadl_teardown *)requestHeader; |
3e7ee490 HJ |
578 | |
579 | if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl) | |
580 | { | |
82250213 | 581 | memcpy(&msgInfo->Response.GpadlTorndown, gpadlTorndown, sizeof(struct vmbus_channel_gpadl_torndown)); |
bfc30aae | 582 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
583 | break; |
584 | } | |
585 | } | |
586 | } | |
dd0813b6 | 587 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
588 | |
589 | DPRINT_EXIT(VMBUS); | |
590 | } | |
591 | ||
592 | ||
593 | /*++ | |
594 | ||
595 | Name: | |
596 | VmbusChannelOnVersionResponse() | |
597 | ||
598 | Description: | |
599 | Version response handler. This is invoked when we received a response | |
600 | to our initiate contact request. Find the matching request, copy the | |
601 | response and signal the requesting thread. | |
602 | ||
603 | --*/ | |
82250213 | 604 | static void VmbusChannelOnVersionResponse(struct vmbus_channel_message_header *hdr) |
3e7ee490 HJ |
605 | { |
606 | LIST_ENTRY* anchor; | |
607 | LIST_ENTRY* curr; | |
aded7165 | 608 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
609 | struct vmbus_channel_message_header *requestHeader; |
610 | struct vmbus_channel_initiate_contact *initiate; | |
611 | struct vmbus_channel_version_response *versionResponse = (struct vmbus_channel_version_response *)hdr; | |
dd0813b6 | 612 | unsigned long flags; |
3e7ee490 HJ |
613 | |
614 | DPRINT_ENTER(VMBUS); | |
615 | ||
dd0813b6 | 616 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
617 | |
618 | ITERATE_LIST_ENTRIES(anchor, curr, &gVmbusConnection.ChannelMsgList) | |
619 | { | |
aded7165 | 620 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 621 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
622 | |
623 | if (requestHeader->MessageType == ChannelMessageInitiateContact) | |
624 | { | |
82250213 GKH |
625 | initiate = (struct vmbus_channel_initiate_contact *)requestHeader; |
626 | memcpy(&msgInfo->Response.VersionResponse, versionResponse, sizeof(struct vmbus_channel_version_response)); | |
bfc30aae | 627 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
628 | } |
629 | } | |
dd0813b6 | 630 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
631 | |
632 | DPRINT_EXIT(VMBUS); | |
633 | } | |
634 | ||
635 | ||
636 | /*++ | |
637 | ||
638 | Name: | |
639 | VmbusOnChannelMessage() | |
640 | ||
641 | Description: | |
642 | Handler for channel protocol messages. | |
643 | This is invoked in the vmbus worker thread context. | |
644 | ||
645 | --*/ | |
b239549c | 646 | void VmbusOnChannelMessage(void *Context) |
3e7ee490 | 647 | { |
eacb1b4d | 648 | struct hv_message *msg = Context; |
82250213 | 649 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
650 | int size; |
651 | ||
652 | DPRINT_ENTER(VMBUS); | |
653 | ||
82250213 | 654 | hdr = (struct vmbus_channel_message_header *)msg->u.Payload; |
3e7ee490 HJ |
655 | size=msg->Header.PayloadSize; |
656 | ||
657 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->MessageType, size); | |
658 | ||
659 | if (hdr->MessageType >= ChannelMessageCount) | |
660 | { | |
661 | DPRINT_ERR(VMBUS, "Received invalid channel message type %d size %d", hdr->MessageType, size); | |
04f50c4d GKH |
662 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
663 | (unsigned char *)msg->u.Payload, size); | |
8c69f52a | 664 | kfree(msg); |
3e7ee490 HJ |
665 | return; |
666 | } | |
667 | ||
668 | if (gChannelMessageTable[hdr->MessageType].messageHandler) | |
669 | { | |
670 | gChannelMessageTable[hdr->MessageType].messageHandler(hdr); | |
671 | } | |
672 | else | |
673 | { | |
674 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", hdr->MessageType); | |
675 | } | |
676 | ||
454f18a9 | 677 | /* Free the msg that was allocated in VmbusOnMsgDPC() */ |
8c69f52a | 678 | kfree(msg); |
3e7ee490 HJ |
679 | DPRINT_EXIT(VMBUS); |
680 | } | |
681 | ||
682 | ||
683 | /*++ | |
684 | ||
685 | Name: | |
686 | VmbusChannelRequestOffers() | |
687 | ||
688 | Description: | |
689 | Send a request to get all our pending offers. | |
690 | ||
691 | --*/ | |
b239549c | 692 | int VmbusChannelRequestOffers(void) |
3e7ee490 HJ |
693 | { |
694 | int ret=0; | |
82250213 | 695 | struct vmbus_channel_message_header *msg; |
aded7165 | 696 | struct vmbus_channel_msginfo *msgInfo; |
3e7ee490 HJ |
697 | |
698 | DPRINT_ENTER(VMBUS); | |
699 | ||
82250213 | 700 | msgInfo = kmalloc(sizeof(*msgInfo) + sizeof(struct vmbus_channel_message_header), GFP_KERNEL); |
3e7ee490 HJ |
701 | ASSERT(msgInfo != NULL); |
702 | ||
bfc30aae | 703 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 704 | msg = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
705 | |
706 | msg->MessageType = ChannelMessageRequestOffers; | |
707 | ||
708 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
709 | INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, &msgInfo->msgListEntry); | |
710 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
711 | ||
82250213 | 712 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_message_header)); |
3e7ee490 HJ |
713 | if (ret != 0) |
714 | { | |
715 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); | |
716 | ||
717 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
718 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
719 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
720 | ||
721 | goto Cleanup; | |
722 | } | |
bfc30aae | 723 | /* osd_WaitEventWait(msgInfo->waitEvent); */ |
3e7ee490 HJ |
724 | |
725 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
726 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
727 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
728 | ||
729 | ||
730 | Cleanup: | |
731 | if (msgInfo) | |
732 | { | |
420beac4 | 733 | kfree(msgInfo->WaitEvent); |
8c69f52a | 734 | kfree(msgInfo); |
3e7ee490 HJ |
735 | } |
736 | ||
737 | DPRINT_EXIT(VMBUS); | |
738 | ||
739 | return ret; | |
740 | } | |
741 | ||
742 | /*++ | |
743 | ||
744 | Name: | |
745 | VmbusChannelReleaseUnattachedChannels() | |
746 | ||
747 | Description: | |
748 | Release channels that are unattached/unconnected ie (no drivers associated) | |
749 | ||
750 | --*/ | |
b239549c | 751 | void VmbusChannelReleaseUnattachedChannels(void) |
3e7ee490 HJ |
752 | { |
753 | LIST_ENTRY *entry; | |
aded7165 GKH |
754 | struct vmbus_channel *channel; |
755 | struct vmbus_channel *start = NULL; | |
0f5e44ca | 756 | unsigned long flags; |
3e7ee490 | 757 | |
0f5e44ca | 758 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
759 | |
760 | while (!IsListEmpty(&gVmbusConnection.ChannelList)) | |
761 | { | |
762 | entry = TOP_LIST_ENTRY(&gVmbusConnection.ChannelList); | |
aded7165 | 763 | channel = CONTAINING_RECORD(entry, struct vmbus_channel, ListEntry); |
3e7ee490 HJ |
764 | |
765 | if (channel == start) | |
766 | break; | |
767 | ||
768 | if (!channel->DeviceObject->Driver) | |
769 | { | |
770 | REMOVE_ENTRY_LIST(&channel->ListEntry); | |
771 | DPRINT_INFO(VMBUS, "Releasing unattached device object %p", channel->DeviceObject); | |
772 | ||
773 | VmbusChildDeviceRemove(channel->DeviceObject); | |
774 | FreeVmbusChannel(channel); | |
775 | } | |
776 | else | |
777 | { | |
778 | if (!start) | |
779 | { | |
780 | start = channel; | |
781 | } | |
782 | } | |
783 | } | |
784 | ||
0f5e44ca | 785 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
786 | } |
787 | ||
454f18a9 | 788 | /* eof */ |