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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 | ||
25 | #include "osd.h" | |
26 | #include "logging.h" | |
27 | ||
28 | #include "VmbusPrivate.h" | |
29 | ||
30 | // | |
31 | // Internal routines | |
32 | // | |
33 | static int | |
34 | VmbusChannelCreateGpadlHeader( | |
35 | PVOID Kbuffer, // must be phys and virt contiguous | |
36 | UINT32 Size, // page-size multiple | |
37 | VMBUS_CHANNEL_MSGINFO **msgInfo, | |
38 | UINT32 *MessageCount | |
39 | ); | |
40 | ||
41 | static void | |
42 | DumpVmbusChannel( | |
43 | VMBUS_CHANNEL *Channel | |
44 | ); | |
45 | ||
46 | ||
47 | static void | |
48 | VmbusChannelSetEvent( | |
49 | VMBUS_CHANNEL *Channel | |
50 | ); | |
51 | ||
52 | ||
53 | #if 0 | |
54 | static void | |
55 | DumpMonitorPage( | |
56 | HV_MONITOR_PAGE *MonitorPage | |
57 | ) | |
58 | { | |
59 | int i=0; | |
60 | int j=0; | |
61 | ||
62 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", MonitorPage, MonitorPage->TriggerState); | |
63 | ||
64 | for (i=0; i<4; i++) | |
65 | { | |
66 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, MonitorPage->TriggerGroup[i].AsUINT64); | |
67 | } | |
68 | ||
69 | for (i=0; i<4; i++) | |
70 | { | |
71 | for (j=0; j<32; j++) | |
72 | { | |
73 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, MonitorPage->Latency[i][j]); | |
74 | } | |
75 | } | |
76 | for (i=0; i<4; i++) | |
77 | { | |
78 | for (j=0; j<32; j++) | |
79 | { | |
80 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].ConnectionId.AsUINT32); | |
81 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].FlagNumber); | |
82 | ||
83 | } | |
84 | } | |
85 | } | |
86 | #endif | |
87 | ||
88 | /*++ | |
89 | ||
90 | Name: | |
91 | VmbusChannelSetEvent() | |
92 | ||
93 | Description: | |
94 | Trigger an event notification on the specified channel. | |
95 | ||
96 | --*/ | |
97 | static void | |
98 | VmbusChannelSetEvent( | |
99 | VMBUS_CHANNEL *Channel | |
100 | ) | |
101 | { | |
102 | HV_MONITOR_PAGE *monitorPage; | |
103 | ||
104 | DPRINT_ENTER(VMBUS); | |
105 | ||
106 | if (Channel->OfferMsg.MonitorAllocated) | |
107 | { | |
108 | // Each UINT32 represents 32 channels | |
109 | BitSet((UINT32*)gVmbusConnection.SendInterruptPage + (Channel->OfferMsg.ChildRelId >> 5), Channel->OfferMsg.ChildRelId & 31); | |
110 | ||
111 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
112 | monitorPage++; // Get the child to parent monitor page | |
113 | ||
114 | BitSet((UINT32*) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending, Channel->MonitorBit); | |
115 | } | |
116 | else | |
117 | { | |
118 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); | |
119 | } | |
120 | ||
121 | DPRINT_EXIT(VMBUS); | |
122 | } | |
123 | ||
124 | #if 0 | |
125 | static void | |
126 | VmbusChannelClearEvent( | |
127 | VMBUS_CHANNEL *Channel | |
128 | ) | |
129 | { | |
130 | HV_MONITOR_PAGE *monitorPage; | |
131 | ||
132 | DPRINT_ENTER(VMBUS); | |
133 | ||
134 | if (Channel->OfferMsg.MonitorAllocated) | |
135 | { | |
136 | // Each UINT32 represents 32 channels | |
137 | BitClear((UINT32*)gVmbusConnection.SendInterruptPage + (Channel->OfferMsg.ChildRelId >> 5), Channel->OfferMsg.ChildRelId & 31); | |
138 | ||
139 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
140 | monitorPage++; // Get the child to parent monitor page | |
141 | ||
142 | BitClear((UINT32*) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending, Channel->MonitorBit); | |
143 | } | |
144 | ||
145 | DPRINT_EXIT(VMBUS); | |
146 | } | |
147 | ||
148 | #endif | |
149 | /*++; | |
150 | ||
151 | Name: | |
152 | VmbusChannelGetDebugInfo() | |
153 | ||
154 | Description: | |
155 | Retrieve various channel debug info | |
156 | ||
157 | --*/ | |
158 | void | |
159 | VmbusChannelGetDebugInfo( | |
160 | VMBUS_CHANNEL *Channel, | |
161 | VMBUS_CHANNEL_DEBUG_INFO *DebugInfo | |
162 | ) | |
163 | { | |
164 | HV_MONITOR_PAGE *monitorPage; | |
165 | UINT8 monitorGroup = (UINT8)Channel->OfferMsg.MonitorId / 32; | |
166 | UINT8 monitorOffset = (UINT8)Channel->OfferMsg.MonitorId % 32; | |
167 | //UINT32 monitorBit = 1 << monitorOffset; | |
168 | ||
169 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
170 | DebugInfo->State = Channel->State; | |
171 | memcpy(&DebugInfo->InterfaceType, &Channel->OfferMsg.Offer.InterfaceType, sizeof(GUID)); | |
172 | memcpy(&DebugInfo->InterfaceInstance, &Channel->OfferMsg.Offer.InterfaceInstance, sizeof(GUID)); | |
173 | ||
174 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
175 | ||
176 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
177 | ||
178 | DebugInfo->ServerMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; | |
179 | DebugInfo->ServerMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; | |
180 | DebugInfo->ServerMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; | |
181 | ||
182 | monitorPage++; | |
183 | ||
184 | DebugInfo->ClientMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; | |
185 | DebugInfo->ClientMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; | |
186 | DebugInfo->ClientMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; | |
187 | ||
188 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
189 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
190 | } | |
191 | ||
192 | ||
193 | /*++; | |
194 | ||
195 | Name: | |
196 | VmbusChannelOpen() | |
197 | ||
198 | Description: | |
199 | Open the specified channel. | |
200 | ||
201 | --*/ | |
202 | int | |
203 | VmbusChannelOpen( | |
204 | VMBUS_CHANNEL *NewChannel, | |
205 | UINT32 SendRingBufferSize, | |
206 | UINT32 RecvRingBufferSize, | |
207 | PVOID UserData, | |
208 | UINT32 UserDataLen, | |
209 | PFN_CHANNEL_CALLBACK pfnOnChannelCallback, | |
210 | PVOID Context | |
211 | ) | |
212 | { | |
213 | int ret=0; | |
214 | VMBUS_CHANNEL_OPEN_CHANNEL* openMsg; | |
215 | VMBUS_CHANNEL_MSGINFO* openInfo; | |
216 | void *in, *out; | |
217 | ||
218 | DPRINT_ENTER(VMBUS); | |
219 | ||
220 | // Aligned to page size | |
221 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE -1))); | |
222 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE -1))); | |
223 | ||
224 | NewChannel->OnChannelCallback = pfnOnChannelCallback; | |
225 | NewChannel->ChannelCallbackContext = Context; | |
226 | ||
227 | // Allocate the ring buffer | |
228 | out = PageAlloc((SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT); | |
229 | //out = MemAllocZeroed(sendRingBufferSize + recvRingBufferSize); | |
230 | ASSERT(out); | |
231 | ASSERT(((ULONG_PTR)out & (PAGE_SIZE-1)) == 0); | |
232 | ||
233 | in = (void*)((ULONG_PTR)out + SendRingBufferSize); | |
234 | ||
235 | NewChannel->RingBufferPages = out; | |
236 | NewChannel->RingBufferPageCount = (SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT; | |
237 | ||
238 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
239 | ||
240 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
241 | ||
242 | // Establish the gpadl for the ring buffer | |
243 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", NewChannel); | |
244 | ||
245 | NewChannel->RingBufferGpadlHandle = 0; | |
246 | ||
247 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
248 | NewChannel->Outbound.RingBuffer, | |
249 | SendRingBufferSize + RecvRingBufferSize, | |
250 | &NewChannel->RingBufferGpadlHandle); | |
251 | ||
252 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p size %d recv ring %p size %d, downstreamoffset %d>", | |
253 | NewChannel, | |
254 | NewChannel->OfferMsg.ChildRelId, | |
255 | NewChannel->RingBufferGpadlHandle, | |
256 | NewChannel->Outbound.RingBuffer, | |
257 | NewChannel->Outbound.RingSize, | |
258 | NewChannel->Inbound.RingBuffer, | |
259 | NewChannel->Inbound.RingSize, | |
260 | SendRingBufferSize); | |
261 | ||
262 | // Create and init the channel open message | |
263 | openInfo = | |
264 | (VMBUS_CHANNEL_MSGINFO*)MemAlloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_OPEN_CHANNEL)); | |
265 | ASSERT(openInfo != NULL); | |
266 | ||
267 | openInfo->WaitEvent = WaitEventCreate(); | |
268 | ||
269 | openMsg = (VMBUS_CHANNEL_OPEN_CHANNEL*)openInfo->Msg; | |
270 | openMsg->Header.MessageType = ChannelMessageOpenChannel; | |
271 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; // FIXME | |
272 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
273 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
274 | ASSERT(openMsg->RingBufferGpadlHandle); | |
275 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> PAGE_SHIFT; | |
276 | openMsg->ServerContextAreaGpadlHandle = 0; // TODO | |
277 | ||
278 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
279 | if (UserDataLen) | |
280 | { | |
281 | memcpy(openMsg->UserData, UserData, UserDataLen); | |
282 | } | |
283 | ||
284 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
285 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &openInfo->MsgListEntry); | |
286 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
287 | ||
288 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
289 | ||
290 | ret = VmbusPostMessage(openMsg, sizeof(VMBUS_CHANNEL_OPEN_CHANNEL)); | |
291 | if (ret != 0) | |
292 | { | |
293 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); | |
294 | goto Cleanup; | |
295 | } | |
296 | ||
297 | // FIXME: Need to time-out here | |
298 | WaitEventWait(openInfo->WaitEvent); | |
299 | ||
300 | if (openInfo->Response.OpenResult.Status == 0) | |
301 | { | |
302 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); | |
303 | } | |
304 | else | |
305 | { | |
306 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", NewChannel, openInfo->Response.OpenResult.Status); | |
307 | } | |
308 | ||
309 | Cleanup: | |
310 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
311 | REMOVE_ENTRY_LIST(&openInfo->MsgListEntry); | |
312 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
313 | ||
314 | WaitEventClose(openInfo->WaitEvent); | |
315 | MemFree(openInfo); | |
316 | ||
317 | DPRINT_EXIT(VMBUS); | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | /*++; | |
323 | ||
324 | Name: | |
325 | DumpGpadlBody() | |
326 | ||
327 | Description: | |
328 | Dump the gpadl body message to the console for debugging purposes. | |
329 | ||
330 | --*/ | |
331 | static void DumpGpadlBody( | |
332 | VMBUS_CHANNEL_GPADL_BODY *Gpadl, | |
333 | UINT32 Len) | |
334 | { | |
335 | int i=0; | |
336 | int pfnCount=0; | |
337 | ||
338 | pfnCount = (Len - sizeof(VMBUS_CHANNEL_GPADL_BODY))/ sizeof(UINT64); | |
339 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); | |
340 | ||
341 | for (i=0; i< pfnCount; i++) | |
342 | { | |
343 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", i, Gpadl->Pfn[i]); | |
344 | } | |
345 | } | |
346 | ||
347 | ||
348 | /*++; | |
349 | ||
350 | Name: | |
351 | DumpGpadlHeader() | |
352 | ||
353 | Description: | |
354 | Dump the gpadl header message to the console for debugging purposes. | |
355 | ||
356 | --*/ | |
357 | static void DumpGpadlHeader( | |
358 | VMBUS_CHANNEL_GPADL_HEADER *Gpadl | |
359 | ) | |
360 | { | |
361 | int i=0,j=0; | |
362 | int pageCount=0; | |
363 | ||
364 | ||
365 | DPRINT_DBG(VMBUS, "gpadl header - relid %d, range count %d, range buflen %d", | |
366 | Gpadl->ChildRelId, | |
367 | Gpadl->RangeCount, | |
368 | Gpadl->RangeBufLen); | |
369 | for (i=0; i< Gpadl->RangeCount; i++) | |
370 | { | |
371 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; | |
372 | pageCount = (pageCount > 26)? 26 : pageCount; | |
373 | ||
374 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d page count %d", | |
375 | i, Gpadl->Range[i].ByteCount, Gpadl->Range[i].ByteOffset, pageCount); | |
376 | ||
377 | for (j=0; j< pageCount; j++) | |
378 | { | |
379 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, Gpadl->Range[i].PfnArray[j]); | |
380 | } | |
381 | } | |
382 | } | |
383 | ||
384 | /*++; | |
385 | ||
386 | Name: | |
387 | VmbusChannelCreateGpadlHeader() | |
388 | ||
389 | Description: | |
390 | Creates a gpadl for the specified buffer | |
391 | ||
392 | --*/ | |
393 | static int | |
394 | VmbusChannelCreateGpadlHeader( | |
395 | PVOID Kbuffer, // from kmalloc() | |
396 | UINT32 Size, // page-size multiple | |
397 | VMBUS_CHANNEL_MSGINFO **MsgInfo, | |
398 | UINT32 *MessageCount) | |
399 | { | |
400 | int i; | |
401 | int pageCount; | |
402 | unsigned long long pfn; | |
403 | VMBUS_CHANNEL_GPADL_HEADER* gpaHeader; | |
404 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
405 | VMBUS_CHANNEL_MSGINFO* msgHeader; | |
406 | VMBUS_CHANNEL_MSGINFO* msgBody; | |
407 | UINT32 msgSize; | |
408 | ||
409 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
410 | ||
411 | //ASSERT( (kbuffer & (PAGE_SIZE-1)) == 0); | |
412 | ASSERT( (Size & (PAGE_SIZE-1)) == 0); | |
413 | ||
414 | pageCount = Size >> PAGE_SHIFT; | |
415 | pfn = GetPhysicalAddress(Kbuffer) >> PAGE_SHIFT; | |
416 | ||
417 | // do we need a gpadl body msg | |
418 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_HEADER) - sizeof(GPA_RANGE); | |
419 | pfnCount = pfnSize / sizeof(UINT64); | |
420 | ||
421 | if (pageCount > pfnCount) // we need a gpadl body | |
422 | { | |
423 | // fill in the header | |
424 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pfnCount*sizeof(UINT64); | |
425 | msgHeader = MemAllocZeroed(msgSize); | |
426 | ||
427 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); | |
428 | msgHeader->MessageSize=msgSize; | |
429 | ||
430 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
431 | gpaHeader->RangeCount = 1; | |
432 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(UINT64); | |
433 | gpaHeader->Range[0].ByteOffset = 0; | |
434 | gpaHeader->Range[0].ByteCount = Size; | |
435 | for (i=0; i<pfnCount; i++) | |
436 | { | |
437 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
438 | } | |
439 | *MsgInfo = msgHeader; | |
440 | *MessageCount = 1; | |
441 | ||
442 | pfnSum = pfnCount; | |
443 | pfnLeft = pageCount - pfnCount; | |
444 | ||
445 | // how many pfns can we fit | |
446 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_BODY); | |
447 | pfnCount = pfnSize / sizeof(UINT64); | |
448 | ||
449 | // fill in the body | |
450 | while (pfnLeft) | |
451 | { | |
452 | if (pfnLeft > pfnCount) | |
453 | { | |
454 | pfnCurr = pfnCount; | |
455 | } | |
456 | else | |
457 | { | |
458 | pfnCurr = pfnLeft; | |
459 | } | |
460 | ||
461 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_BODY) + pfnCurr*sizeof(UINT64); | |
462 | msgBody = MemAllocZeroed(msgSize); | |
463 | ASSERT(msgBody); | |
464 | msgBody->MessageSize = msgSize; | |
465 | (*MessageCount)++; | |
466 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)msgBody->Msg; | |
467 | ||
468 | // FIXME: Gpadl is UINT32 and we are using a pointer which could be 64-bit | |
469 | //gpadlBody->Gpadl = kbuffer; | |
470 | for (i=0; i<pfnCurr; i++) | |
471 | { | |
472 | gpadlBody->Pfn[i] = pfn + pfnSum + i; | |
473 | } | |
474 | ||
475 | // add to msg header | |
476 | INSERT_TAIL_LIST(&msgHeader->SubMsgList, &msgBody->MsgListEntry); | |
477 | pfnSum += pfnCurr; | |
478 | pfnLeft -= pfnCurr; | |
479 | } | |
480 | } | |
481 | else | |
482 | { | |
483 | // everything fits in a header | |
484 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pageCount*sizeof(UINT64); | |
485 | msgHeader = MemAllocZeroed(msgSize); | |
486 | msgHeader->MessageSize=msgSize; | |
487 | ||
488 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
489 | gpaHeader->RangeCount = 1; | |
490 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(UINT64); | |
491 | gpaHeader->Range[0].ByteOffset = 0; | |
492 | gpaHeader->Range[0].ByteCount = Size; | |
493 | for (i=0; i<pageCount; i++) | |
494 | { | |
495 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
496 | } | |
497 | ||
498 | *MsgInfo = msgHeader; | |
499 | *MessageCount = 1; | |
500 | } | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
505 | ||
506 | /*++; | |
507 | ||
508 | Name: | |
509 | VmbusChannelEstablishGpadl() | |
510 | ||
511 | Description: | |
512 | Estabish a GPADL for the specified buffer | |
513 | ||
514 | --*/ | |
515 | int | |
516 | VmbusChannelEstablishGpadl( | |
517 | VMBUS_CHANNEL *Channel, | |
518 | PVOID Kbuffer, // from kmalloc() | |
519 | UINT32 Size, // page-size multiple | |
520 | UINT32 *GpadlHandle | |
521 | ) | |
522 | { | |
523 | int ret=0; | |
524 | VMBUS_CHANNEL_GPADL_HEADER* gpadlMsg; | |
525 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
526 | //VMBUS_CHANNEL_GPADL_CREATED* gpadlCreated; | |
527 | ||
528 | VMBUS_CHANNEL_MSGINFO *msgInfo; | |
529 | VMBUS_CHANNEL_MSGINFO *subMsgInfo; | |
530 | ||
531 | UINT32 msgCount; | |
532 | LIST_ENTRY* anchor; | |
533 | LIST_ENTRY* curr; | |
534 | UINT32 nextGpadlHandle; | |
535 | ||
536 | DPRINT_ENTER(VMBUS); | |
537 | ||
538 | nextGpadlHandle = gVmbusConnection.NextGpadlHandle; | |
539 | InterlockedIncrement((int*)&gVmbusConnection.NextGpadlHandle); | |
540 | ||
541 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
542 | ASSERT(msgInfo != NULL); | |
543 | ASSERT(msgCount >0); | |
544 | ||
545 | msgInfo->WaitEvent = WaitEventCreate(); | |
546 | gpadlMsg = (VMBUS_CHANNEL_GPADL_HEADER*)msgInfo->Msg; | |
547 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; | |
548 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
549 | gpadlMsg->Gpadl = nextGpadlHandle; | |
550 | ||
551 | DumpGpadlHeader(gpadlMsg); | |
552 | ||
553 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
554 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry); | |
555 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
556 | ||
557 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", Kbuffer, Size, msgCount); | |
558 | ||
559 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %d", msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
560 | ||
561 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
562 | if (ret != 0) | |
563 | { | |
564 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); | |
565 | goto Cleanup; | |
566 | } | |
567 | ||
568 | if (msgCount>1) | |
569 | { | |
570 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) | |
571 | { | |
572 | subMsgInfo = (VMBUS_CHANNEL_MSGINFO*) curr; | |
573 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)subMsgInfo->Msg; | |
574 | ||
575 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
576 | gpadlBody->Gpadl = nextGpadlHandle; | |
577 | ||
578 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %d", subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
579 | ||
580 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
581 | ret = VmbusPostMessage(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
582 | ASSERT(ret == 0); | |
583 | } | |
584 | } | |
585 | WaitEventWait(msgInfo->WaitEvent); | |
586 | ||
587 | // At this point, we received the gpadl created msg | |
588 | DPRINT_DBG(VMBUS, "Received GPADL created (relid %d, status %d handle %x)", | |
589 | Channel->OfferMsg.ChildRelId, | |
590 | msgInfo->Response.GpadlCreated.CreationStatus, | |
591 | gpadlMsg->Gpadl); | |
592 | ||
593 | *GpadlHandle = gpadlMsg->Gpadl; | |
594 | ||
595 | Cleanup: | |
596 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
597 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); | |
598 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
599 | ||
600 | WaitEventClose(msgInfo->WaitEvent); | |
601 | MemFree(msgInfo); | |
602 | ||
603 | DPRINT_EXIT(VMBUS); | |
604 | ||
605 | return ret; | |
606 | } | |
607 | ||
608 | ||
609 | ||
610 | /*++; | |
611 | ||
612 | Name: | |
613 | VmbusChannelTeardownGpadl() | |
614 | ||
615 | Description: | |
616 | Teardown the specified GPADL handle | |
617 | ||
618 | --*/ | |
619 | int | |
620 | VmbusChannelTeardownGpadl( | |
621 | VMBUS_CHANNEL *Channel, | |
622 | UINT32 GpadlHandle | |
623 | ) | |
624 | { | |
625 | int ret=0; | |
626 | VMBUS_CHANNEL_GPADL_TEARDOWN *msg; | |
627 | VMBUS_CHANNEL_MSGINFO* info; | |
628 | ||
629 | DPRINT_ENTER(VMBUS); | |
630 | ||
631 | ASSERT(GpadlHandle != 0); | |
632 | ||
633 | info = | |
634 | (VMBUS_CHANNEL_MSGINFO*)MemAlloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN)); | |
635 | ASSERT(info != NULL); | |
636 | ||
637 | info->WaitEvent = WaitEventCreate(); | |
638 | ||
639 | msg = (VMBUS_CHANNEL_GPADL_TEARDOWN*)info->Msg; | |
640 | ||
641 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
642 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
643 | msg->Gpadl = GpadlHandle; | |
644 | ||
645 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
646 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); | |
647 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
648 | ||
649 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN)); | |
650 | if (ret != 0) | |
651 | { | |
652 | // TODO: | |
653 | } | |
654 | ||
655 | WaitEventWait(info->WaitEvent); | |
656 | ||
657 | // Received a torndown response | |
658 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
659 | REMOVE_ENTRY_LIST(&info->MsgListEntry); | |
660 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
661 | ||
662 | WaitEventClose(info->WaitEvent); | |
663 | MemFree(info); | |
664 | ||
665 | DPRINT_EXIT(VMBUS); | |
666 | ||
667 | return ret; | |
668 | } | |
669 | ||
670 | ||
671 | /*++ | |
672 | ||
673 | Name: | |
674 | VmbusChannelClose() | |
675 | ||
676 | Description: | |
677 | Close the specified channel | |
678 | ||
679 | --*/ | |
680 | VOID | |
681 | VmbusChannelClose( | |
682 | VMBUS_CHANNEL *Channel | |
683 | ) | |
684 | { | |
685 | int ret=0; | |
686 | VMBUS_CHANNEL_CLOSE_CHANNEL* msg; | |
687 | VMBUS_CHANNEL_MSGINFO* info; | |
688 | ||
689 | DPRINT_ENTER(VMBUS); | |
690 | ||
691 | // Stop callback and cancel the timer asap | |
692 | Channel->OnChannelCallback = NULL; | |
693 | TimerStop(Channel->PollTimer); | |
694 | ||
695 | // Send a closing message | |
696 | info = | |
697 | (VMBUS_CHANNEL_MSGINFO*)MemAlloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL)); | |
698 | ASSERT(info != NULL); | |
699 | ||
700 | //info->waitEvent = WaitEventCreate(); | |
701 | ||
702 | msg = (VMBUS_CHANNEL_CLOSE_CHANNEL*)info->Msg; | |
703 | msg->Header.MessageType = ChannelMessageCloseChannel; | |
704 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
705 | ||
706 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL)); | |
707 | if (ret != 0) | |
708 | { | |
709 | // TODO: | |
710 | } | |
711 | ||
712 | // Tear down the gpadl for the channel's ring buffer | |
713 | if (Channel->RingBufferGpadlHandle) | |
714 | { | |
715 | VmbusChannelTeardownGpadl(Channel, Channel->RingBufferGpadlHandle); | |
716 | } | |
717 | ||
718 | // TODO: Send a msg to release the childRelId | |
719 | ||
720 | // Cleanup the ring buffers for this channel | |
721 | RingBufferCleanup(&Channel->Outbound); | |
722 | RingBufferCleanup(&Channel->Inbound); | |
723 | ||
724 | PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); | |
725 | ||
726 | MemFree(info); | |
727 | ||
728 | // If we are closing the channel during an error path in opening the channel, don't free the channel | |
729 | // since the caller will free the channel | |
730 | if (Channel->State == CHANNEL_OPEN_STATE) | |
731 | { | |
732 | SpinlockAcquire(gVmbusConnection.ChannelLock); | |
733 | REMOVE_ENTRY_LIST(&Channel->ListEntry); | |
734 | SpinlockRelease(gVmbusConnection.ChannelLock); | |
735 | ||
736 | FreeVmbusChannel(Channel); | |
737 | } | |
738 | ||
739 | DPRINT_EXIT(VMBUS); | |
740 | } | |
741 | ||
742 | ||
743 | /*++ | |
744 | ||
745 | Name: | |
746 | VmbusChannelSendPacket() | |
747 | ||
748 | Description: | |
749 | Send the specified buffer on the given channel | |
750 | ||
751 | --*/ | |
752 | int | |
753 | VmbusChannelSendPacket( | |
754 | VMBUS_CHANNEL *Channel, | |
755 | const PVOID Buffer, | |
756 | UINT32 BufferLen, | |
757 | UINT64 RequestId, | |
758 | VMBUS_PACKET_TYPE Type, | |
759 | UINT32 Flags | |
760 | ) | |
761 | { | |
762 | int ret=0; | |
763 | VMPACKET_DESCRIPTOR desc; | |
764 | UINT32 packetLen = sizeof(VMPACKET_DESCRIPTOR) + BufferLen; | |
765 | UINT32 packetLenAligned = ALIGN_UP(packetLen, sizeof(UINT64)); | |
766 | SG_BUFFER_LIST bufferList[3]; | |
767 | UINT64 alignedData=0; | |
768 | ||
769 | DPRINT_ENTER(VMBUS); | |
770 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", Channel, Buffer, BufferLen); | |
771 | ||
772 | DumpVmbusChannel(Channel); | |
773 | ||
774 | ASSERT((packetLenAligned - packetLen) < sizeof(UINT64)); | |
775 | ||
776 | // Setup the descriptor | |
777 | desc.Type = Type;//VmbusPacketTypeDataInBand; | |
778 | desc.Flags = Flags;//VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
779 | desc.DataOffset8 = sizeof(VMPACKET_DESCRIPTOR) >> 3; // in 8-bytes granularity | |
780 | desc.Length8 = (UINT16)(packetLenAligned >> 3); | |
781 | desc.TransactionId = RequestId; | |
782 | ||
783 | bufferList[0].Data = &desc; | |
784 | bufferList[0].Length = sizeof(VMPACKET_DESCRIPTOR); | |
785 | ||
786 | bufferList[1].Data = Buffer; | |
787 | bufferList[1].Length = BufferLen; | |
788 | ||
789 | bufferList[2].Data = &alignedData; | |
790 | bufferList[2].Length = packetLenAligned - packetLen; | |
791 | ||
792 | ret = RingBufferWrite( | |
793 | &Channel->Outbound, | |
794 | bufferList, | |
795 | 3); | |
796 | ||
797 | // TODO: We should determine if this is optional | |
798 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
799 | { | |
800 | VmbusChannelSetEvent(Channel); | |
801 | } | |
802 | ||
803 | DPRINT_EXIT(VMBUS); | |
804 | ||
805 | return ret; | |
806 | } | |
807 | ||
808 | ||
809 | /*++ | |
810 | ||
811 | Name: | |
812 | VmbusChannelSendPacketPageBuffer() | |
813 | ||
814 | Description: | |
815 | Send a range of single-page buffer packets using a GPADL Direct packet type. | |
816 | ||
817 | --*/ | |
818 | int | |
819 | VmbusChannelSendPacketPageBuffer( | |
820 | VMBUS_CHANNEL *Channel, | |
821 | PAGE_BUFFER PageBuffers[], | |
822 | UINT32 PageCount, | |
823 | PVOID Buffer, | |
824 | UINT32 BufferLen, | |
825 | UINT64 RequestId | |
826 | ) | |
827 | { | |
828 | int ret=0; | |
829 | int i=0; | |
830 | VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; | |
831 | UINT32 descSize; | |
832 | UINT32 packetLen; | |
833 | UINT32 packetLenAligned; | |
834 | SG_BUFFER_LIST bufferList[3]; | |
835 | UINT64 alignedData=0; | |
836 | ||
837 | DPRINT_ENTER(VMBUS); | |
838 | ||
839 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
840 | ||
841 | DumpVmbusChannel(Channel); | |
842 | ||
843 | // Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the largest size we support | |
844 | descSize = sizeof(VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - ((MAX_PAGE_BUFFER_COUNT - PageCount)*sizeof(PAGE_BUFFER)); | |
845 | packetLen = descSize + BufferLen; | |
846 | packetLenAligned = ALIGN_UP(packetLen, sizeof(UINT64)); | |
847 | ||
848 | ASSERT((packetLenAligned - packetLen) < sizeof(UINT64)); | |
849 | ||
850 | // Setup the descriptor | |
851 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; | |
852 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
853 | desc.DataOffset8 = descSize >> 3; // in 8-bytes grandularity | |
854 | desc.Length8 = (UINT16)(packetLenAligned >> 3); | |
855 | desc.TransactionId = RequestId; | |
856 | desc.RangeCount = PageCount; | |
857 | ||
858 | for (i=0; i<PageCount; i++) | |
859 | { | |
860 | desc.Range[i].Length = PageBuffers[i].Length; | |
861 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
862 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
863 | } | |
864 | ||
865 | bufferList[0].Data = &desc; | |
866 | bufferList[0].Length = descSize; | |
867 | ||
868 | bufferList[1].Data = Buffer; | |
869 | bufferList[1].Length = BufferLen; | |
870 | ||
871 | bufferList[2].Data = &alignedData; | |
872 | bufferList[2].Length = packetLenAligned - packetLen; | |
873 | ||
874 | ret = RingBufferWrite( | |
875 | &Channel->Outbound, | |
876 | bufferList, | |
877 | 3); | |
878 | ||
879 | // TODO: We should determine if this is optional | |
880 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
881 | { | |
882 | VmbusChannelSetEvent(Channel); | |
883 | } | |
884 | ||
885 | DPRINT_EXIT(VMBUS); | |
886 | ||
887 | return ret; | |
888 | } | |
889 | ||
890 | ||
891 | ||
892 | /*++ | |
893 | ||
894 | Name: | |
895 | VmbusChannelSendPacketMultiPageBuffer() | |
896 | ||
897 | Description: | |
898 | Send a multi-page buffer packet using a GPADL Direct packet type. | |
899 | ||
900 | --*/ | |
901 | int | |
902 | VmbusChannelSendPacketMultiPageBuffer( | |
903 | VMBUS_CHANNEL *Channel, | |
904 | MULTIPAGE_BUFFER *MultiPageBuffer, | |
905 | PVOID Buffer, | |
906 | UINT32 BufferLen, | |
907 | UINT64 RequestId | |
908 | ) | |
909 | { | |
910 | int ret=0; | |
911 | VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; | |
912 | UINT32 descSize; | |
913 | UINT32 packetLen; | |
914 | UINT32 packetLenAligned; | |
915 | SG_BUFFER_LIST bufferList[3]; | |
916 | UINT64 alignedData=0; | |
917 | UINT32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, MultiPageBuffer->Length); | |
918 | ||
919 | DPRINT_ENTER(VMBUS); | |
920 | ||
921 | DumpVmbusChannel(Channel); | |
922 | ||
923 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
924 | ||
925 | ASSERT(PfnCount > 0); | |
926 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
927 | ||
928 | // Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is the largest size we support | |
929 | descSize = sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount)*sizeof(UINT64)); | |
930 | packetLen = descSize + BufferLen; | |
931 | packetLenAligned = ALIGN_UP(packetLen, sizeof(UINT64)); | |
932 | ||
933 | ASSERT((packetLenAligned - packetLen) < sizeof(UINT64)); | |
934 | ||
935 | // Setup the descriptor | |
936 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; | |
937 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
938 | desc.DataOffset8 = descSize >> 3; // in 8-bytes grandularity | |
939 | desc.Length8 = (UINT16)(packetLenAligned >> 3); | |
940 | desc.TransactionId = RequestId; | |
941 | desc.RangeCount = 1; | |
942 | ||
943 | desc.Range.Length = MultiPageBuffer->Length; | |
944 | desc.Range.Offset = MultiPageBuffer->Offset; | |
945 | ||
946 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, PfnCount*sizeof(UINT64)); | |
947 | ||
948 | bufferList[0].Data = &desc; | |
949 | bufferList[0].Length = descSize; | |
950 | ||
951 | bufferList[1].Data = Buffer; | |
952 | bufferList[1].Length = BufferLen; | |
953 | ||
954 | bufferList[2].Data = &alignedData; | |
955 | bufferList[2].Length = packetLenAligned - packetLen; | |
956 | ||
957 | ret = RingBufferWrite( | |
958 | &Channel->Outbound, | |
959 | bufferList, | |
960 | 3); | |
961 | ||
962 | // TODO: We should determine if this is optional | |
963 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
964 | { | |
965 | VmbusChannelSetEvent(Channel); | |
966 | } | |
967 | ||
968 | DPRINT_EXIT(VMBUS); | |
969 | ||
970 | return ret; | |
971 | } | |
972 | ||
973 | ||
974 | /*++ | |
975 | ||
976 | Name: | |
977 | VmbusChannelRecvPacket() | |
978 | ||
979 | Description: | |
980 | Retrieve the user packet on the specified channel | |
981 | ||
982 | --*/ | |
983 | // TODO: Do we ever receive a gpa direct packet other than the ones we send ? | |
984 | int | |
985 | VmbusChannelRecvPacket( | |
986 | VMBUS_CHANNEL *Channel, | |
987 | PVOID Buffer, | |
988 | UINT32 BufferLen, | |
989 | UINT32* BufferActualLen, | |
990 | UINT64* RequestId | |
991 | ) | |
992 | { | |
993 | VMPACKET_DESCRIPTOR desc; | |
994 | UINT32 packetLen; | |
995 | UINT32 userLen; | |
996 | int ret; | |
997 | ||
998 | DPRINT_ENTER(VMBUS); | |
999 | ||
1000 | *BufferActualLen = 0; | |
1001 | *RequestId = 0; | |
1002 | ||
1003 | SpinlockAcquire(Channel->InboundLock); | |
1004 | ||
1005 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1006 | if (ret != 0) | |
1007 | { | |
1008 | SpinlockRelease(Channel->InboundLock); | |
1009 | ||
1010 | //DPRINT_DBG(VMBUS, "nothing to read!!"); | |
1011 | DPRINT_EXIT(VMBUS); | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | //VmbusChannelClearEvent(Channel); | |
1016 | ||
1017 | packetLen = desc.Length8 << 3; | |
1018 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1019 | //ASSERT(userLen > 0); | |
1020 | ||
1021 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1022 | Channel, | |
1023 | Channel->OfferMsg.ChildRelId, | |
1024 | desc.Type, | |
1025 | desc.Flags, | |
1026 | desc.TransactionId, packetLen, userLen); | |
1027 | ||
1028 | *BufferActualLen = userLen; | |
1029 | ||
1030 | if (userLen > BufferLen) | |
1031 | { | |
1032 | SpinlockRelease(Channel->InboundLock); | |
1033 | ||
1034 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", BufferLen, userLen); | |
1035 | DPRINT_EXIT(VMBUS); | |
1036 | ||
1037 | return -1; | |
1038 | } | |
1039 | ||
1040 | *RequestId = desc.TransactionId; | |
1041 | ||
1042 | // Copy over the packet to the user buffer | |
1043 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, (desc.DataOffset8 << 3)); | |
1044 | ||
1045 | SpinlockRelease(Channel->InboundLock); | |
1046 | ||
1047 | DPRINT_EXIT(VMBUS); | |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | /*++ | |
1053 | ||
1054 | Name: | |
1055 | VmbusChannelRecvPacketRaw() | |
1056 | ||
1057 | Description: | |
1058 | Retrieve the raw packet on the specified channel | |
1059 | ||
1060 | --*/ | |
1061 | int | |
1062 | VmbusChannelRecvPacketRaw( | |
1063 | VMBUS_CHANNEL *Channel, | |
1064 | PVOID Buffer, | |
1065 | UINT32 BufferLen, | |
1066 | UINT32* BufferActualLen, | |
1067 | UINT64* RequestId | |
1068 | ) | |
1069 | { | |
1070 | VMPACKET_DESCRIPTOR desc; | |
1071 | UINT32 packetLen; | |
1072 | UINT32 userLen; | |
1073 | int ret; | |
1074 | ||
1075 | DPRINT_ENTER(VMBUS); | |
1076 | ||
1077 | *BufferActualLen = 0; | |
1078 | *RequestId = 0; | |
1079 | ||
1080 | SpinlockAcquire(Channel->InboundLock); | |
1081 | ||
1082 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1083 | if (ret != 0) | |
1084 | { | |
1085 | SpinlockRelease(Channel->InboundLock); | |
1086 | ||
1087 | //DPRINT_DBG(VMBUS, "nothing to read!!"); | |
1088 | DPRINT_EXIT(VMBUS); | |
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | //VmbusChannelClearEvent(Channel); | |
1093 | ||
1094 | packetLen = desc.Length8 << 3; | |
1095 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1096 | ||
1097 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1098 | Channel, | |
1099 | Channel->OfferMsg.ChildRelId, | |
1100 | desc.Type, | |
1101 | desc.Flags, | |
1102 | desc.TransactionId, packetLen, userLen); | |
1103 | ||
1104 | *BufferActualLen = packetLen; | |
1105 | ||
1106 | if (packetLen > BufferLen) | |
1107 | { | |
1108 | SpinlockRelease(Channel->InboundLock); | |
1109 | ||
1110 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but got space for only %d bytes", packetLen, BufferLen); | |
1111 | DPRINT_EXIT(VMBUS); | |
1112 | return -2; | |
1113 | } | |
1114 | ||
1115 | *RequestId = desc.TransactionId; | |
1116 | ||
1117 | // Copy over the entire packet to the user buffer | |
1118 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); | |
1119 | ||
1120 | SpinlockRelease(Channel->InboundLock); | |
1121 | ||
1122 | DPRINT_EXIT(VMBUS); | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | ||
1128 | /*++ | |
1129 | ||
1130 | Name: | |
1131 | VmbusChannelOnChannelEvent() | |
1132 | ||
1133 | Description: | |
1134 | Channel event callback | |
1135 | ||
1136 | --*/ | |
1137 | void | |
1138 | VmbusChannelOnChannelEvent( | |
1139 | VMBUS_CHANNEL *Channel | |
1140 | ) | |
1141 | { | |
1142 | DumpVmbusChannel(Channel); | |
1143 | ASSERT(Channel->OnChannelCallback); | |
1144 | #ifdef ENABLE_POLLING | |
1145 | TimerStop(Channel->PollTimer); | |
1146 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1147 | TimerStart(Channel->PollTimer, 100 /* 100us */); | |
1148 | #else | |
1149 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1150 | #endif | |
1151 | } | |
1152 | ||
1153 | /*++ | |
1154 | ||
1155 | Name: | |
1156 | VmbusChannelOnTimer() | |
1157 | ||
1158 | Description: | |
1159 | Timer event callback | |
1160 | ||
1161 | --*/ | |
1162 | void | |
1163 | VmbusChannelOnTimer( | |
1164 | void *Context | |
1165 | ) | |
1166 | { | |
1167 | VMBUS_CHANNEL *channel = (VMBUS_CHANNEL*)Context; | |
1168 | ||
1169 | if (channel->OnChannelCallback) | |
1170 | { | |
1171 | channel->OnChannelCallback(channel->ChannelCallbackContext); | |
1172 | #ifdef ENABLE_POLLING | |
1173 | TimerStart(channel->PollTimer, 100 /* 100us */); | |
1174 | #endif | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | ||
1179 | /*++ | |
1180 | ||
1181 | Name: | |
1182 | DumpVmbusChannel() | |
1183 | ||
1184 | Description: | |
1185 | Dump vmbus channel info to the console | |
1186 | ||
1187 | --*/ | |
1188 | static void | |
1189 | DumpVmbusChannel( | |
1190 | VMBUS_CHANNEL *Channel | |
1191 | ) | |
1192 | { | |
1193 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1194 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1195 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1196 | } | |
1197 | ||
1198 | ||
1199 | // eof |