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 | ||
5654e932 | 24 | #include <linux/kernel.h> |
09d50ff8 GKH |
25 | #include "include/osd.h" |
26 | #include "include/logging.h" | |
3e7ee490 HJ |
27 | |
28 | #include "VmbusPrivate.h" | |
29 | ||
30 | // | |
31 | // Internal routines | |
32 | // | |
33 | static int | |
34 | VmbusChannelCreateGpadlHeader( | |
8282c400 | 35 | void * Kbuffer, // must be phys and virt contiguous |
4d643114 | 36 | u32 Size, // page-size multiple |
3e7ee490 | 37 | VMBUS_CHANNEL_MSGINFO **msgInfo, |
4d643114 | 38 | u32 *MessageCount |
3e7ee490 HJ |
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 | { | |
4d643114 | 80 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].ConnectionId.Asu32); |
3e7ee490 HJ |
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 | { | |
4d643114 GKH |
108 | // Each u32 represents 32 channels |
109 | BitSet((u32*)gVmbusConnection.SendInterruptPage + (Channel->OfferMsg.ChildRelId >> 5), Channel->OfferMsg.ChildRelId & 31); | |
3e7ee490 HJ |
110 | |
111 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
112 | monitorPage++; // Get the child to parent monitor page | |
113 | ||
4d643114 | 114 | BitSet((u32*) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending, Channel->MonitorBit); |
3e7ee490 HJ |
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 | { | |
4d643114 GKH |
136 | // Each u32 represents 32 channels |
137 | BitClear((u32*)gVmbusConnection.SendInterruptPage + (Channel->OfferMsg.ChildRelId >> 5), Channel->OfferMsg.ChildRelId & 31); | |
3e7ee490 HJ |
138 | |
139 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
140 | monitorPage++; // Get the child to parent monitor page | |
141 | ||
4d643114 | 142 | BitClear((u32*) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending, Channel->MonitorBit); |
3e7ee490 HJ |
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; | |
5654e932 GKH |
165 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
166 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
4d643114 | 167 | //u32 monitorBit = 1 << monitorOffset; |
3e7ee490 HJ |
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, | |
4d643114 GKH |
205 | u32 SendRingBufferSize, |
206 | u32 RecvRingBufferSize, | |
8282c400 | 207 | void * UserData, |
4d643114 | 208 | u32 UserDataLen, |
3e7ee490 | 209 | PFN_CHANNEL_CALLBACK pfnOnChannelCallback, |
8282c400 | 210 | void * Context |
3e7ee490 HJ |
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); | |
e276a3a5 | 229 | //out = kzalloc(sendRingBufferSize + recvRingBufferSize, GFP_KERNEL); |
3e7ee490 | 230 | ASSERT(out); |
c4b0bc94 | 231 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 232 | |
c4b0bc94 | 233 | in = (void*)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
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 | |
e40d37cc | 263 | openInfo = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_OPEN_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
264 | ASSERT(openInfo != NULL); |
265 | ||
266 | openInfo->WaitEvent = WaitEventCreate(); | |
267 | ||
268 | openMsg = (VMBUS_CHANNEL_OPEN_CHANNEL*)openInfo->Msg; | |
269 | openMsg->Header.MessageType = ChannelMessageOpenChannel; | |
270 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; // FIXME | |
271 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
272 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
273 | ASSERT(openMsg->RingBufferGpadlHandle); | |
274 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> PAGE_SHIFT; | |
275 | openMsg->ServerContextAreaGpadlHandle = 0; // TODO | |
276 | ||
277 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
278 | if (UserDataLen) | |
279 | { | |
280 | memcpy(openMsg->UserData, UserData, UserDataLen); | |
281 | } | |
282 | ||
283 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
284 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &openInfo->MsgListEntry); | |
285 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
286 | ||
287 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
288 | ||
289 | ret = VmbusPostMessage(openMsg, sizeof(VMBUS_CHANNEL_OPEN_CHANNEL)); | |
290 | if (ret != 0) | |
291 | { | |
292 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); | |
293 | goto Cleanup; | |
294 | } | |
295 | ||
296 | // FIXME: Need to time-out here | |
297 | WaitEventWait(openInfo->WaitEvent); | |
298 | ||
299 | if (openInfo->Response.OpenResult.Status == 0) | |
300 | { | |
301 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); | |
302 | } | |
303 | else | |
304 | { | |
305 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", NewChannel, openInfo->Response.OpenResult.Status); | |
306 | } | |
307 | ||
308 | Cleanup: | |
309 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
310 | REMOVE_ENTRY_LIST(&openInfo->MsgListEntry); | |
311 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
312 | ||
313 | WaitEventClose(openInfo->WaitEvent); | |
314 | MemFree(openInfo); | |
315 | ||
316 | DPRINT_EXIT(VMBUS); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | /*++; | |
322 | ||
323 | Name: | |
324 | DumpGpadlBody() | |
325 | ||
326 | Description: | |
327 | Dump the gpadl body message to the console for debugging purposes. | |
328 | ||
329 | --*/ | |
330 | static void DumpGpadlBody( | |
331 | VMBUS_CHANNEL_GPADL_BODY *Gpadl, | |
4d643114 | 332 | u32 Len) |
3e7ee490 HJ |
333 | { |
334 | int i=0; | |
335 | int pfnCount=0; | |
336 | ||
59471438 | 337 | pfnCount = (Len - sizeof(VMBUS_CHANNEL_GPADL_BODY))/ sizeof(u64); |
3e7ee490 HJ |
338 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
339 | ||
340 | for (i=0; i< pfnCount; i++) | |
341 | { | |
342 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", i, Gpadl->Pfn[i]); | |
343 | } | |
344 | } | |
345 | ||
346 | ||
347 | /*++; | |
348 | ||
349 | Name: | |
350 | DumpGpadlHeader() | |
351 | ||
352 | Description: | |
353 | Dump the gpadl header message to the console for debugging purposes. | |
354 | ||
355 | --*/ | |
356 | static void DumpGpadlHeader( | |
357 | VMBUS_CHANNEL_GPADL_HEADER *Gpadl | |
358 | ) | |
359 | { | |
360 | int i=0,j=0; | |
361 | int pageCount=0; | |
362 | ||
363 | ||
364 | DPRINT_DBG(VMBUS, "gpadl header - relid %d, range count %d, range buflen %d", | |
365 | Gpadl->ChildRelId, | |
366 | Gpadl->RangeCount, | |
367 | Gpadl->RangeBufLen); | |
368 | for (i=0; i< Gpadl->RangeCount; i++) | |
369 | { | |
370 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; | |
371 | pageCount = (pageCount > 26)? 26 : pageCount; | |
372 | ||
373 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d page count %d", | |
374 | i, Gpadl->Range[i].ByteCount, Gpadl->Range[i].ByteOffset, pageCount); | |
375 | ||
376 | for (j=0; j< pageCount; j++) | |
377 | { | |
378 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, Gpadl->Range[i].PfnArray[j]); | |
379 | } | |
380 | } | |
381 | } | |
382 | ||
383 | /*++; | |
384 | ||
385 | Name: | |
386 | VmbusChannelCreateGpadlHeader() | |
387 | ||
388 | Description: | |
389 | Creates a gpadl for the specified buffer | |
390 | ||
391 | --*/ | |
392 | static int | |
393 | VmbusChannelCreateGpadlHeader( | |
8282c400 | 394 | void * Kbuffer, // from kmalloc() |
4d643114 | 395 | u32 Size, // page-size multiple |
3e7ee490 | 396 | VMBUS_CHANNEL_MSGINFO **MsgInfo, |
4d643114 | 397 | u32 *MessageCount) |
3e7ee490 HJ |
398 | { |
399 | int i; | |
400 | int pageCount; | |
401 | unsigned long long pfn; | |
402 | VMBUS_CHANNEL_GPADL_HEADER* gpaHeader; | |
403 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
404 | VMBUS_CHANNEL_MSGINFO* msgHeader; | |
405 | VMBUS_CHANNEL_MSGINFO* msgBody; | |
4d643114 | 406 | u32 msgSize; |
3e7ee490 HJ |
407 | |
408 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
409 | ||
410 | //ASSERT( (kbuffer & (PAGE_SIZE-1)) == 0); | |
411 | ASSERT( (Size & (PAGE_SIZE-1)) == 0); | |
412 | ||
413 | pageCount = Size >> PAGE_SHIFT; | |
414 | pfn = GetPhysicalAddress(Kbuffer) >> PAGE_SHIFT; | |
415 | ||
416 | // do we need a gpadl body msg | |
417 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_HEADER) - sizeof(GPA_RANGE); | |
59471438 | 418 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 HJ |
419 | |
420 | if (pageCount > pfnCount) // we need a gpadl body | |
421 | { | |
422 | // fill in the header | |
59471438 | 423 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pfnCount*sizeof(u64); |
e276a3a5 | 424 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
425 | |
426 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); | |
427 | msgHeader->MessageSize=msgSize; | |
428 | ||
429 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
430 | gpaHeader->RangeCount = 1; | |
59471438 | 431 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
432 | gpaHeader->Range[0].ByteOffset = 0; |
433 | gpaHeader->Range[0].ByteCount = Size; | |
434 | for (i=0; i<pfnCount; i++) | |
435 | { | |
436 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
437 | } | |
438 | *MsgInfo = msgHeader; | |
439 | *MessageCount = 1; | |
440 | ||
441 | pfnSum = pfnCount; | |
442 | pfnLeft = pageCount - pfnCount; | |
443 | ||
444 | // how many pfns can we fit | |
445 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_BODY); | |
59471438 | 446 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 HJ |
447 | |
448 | // fill in the body | |
449 | while (pfnLeft) | |
450 | { | |
451 | if (pfnLeft > pfnCount) | |
452 | { | |
453 | pfnCurr = pfnCount; | |
454 | } | |
455 | else | |
456 | { | |
457 | pfnCurr = pfnLeft; | |
458 | } | |
459 | ||
59471438 | 460 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_BODY) + pfnCurr*sizeof(u64); |
e276a3a5 | 461 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
462 | ASSERT(msgBody); |
463 | msgBody->MessageSize = msgSize; | |
464 | (*MessageCount)++; | |
465 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)msgBody->Msg; | |
466 | ||
4d643114 | 467 | // FIXME: Gpadl is u32 and we are using a pointer which could be 64-bit |
3e7ee490 HJ |
468 | //gpadlBody->Gpadl = kbuffer; |
469 | for (i=0; i<pfnCurr; i++) | |
470 | { | |
471 | gpadlBody->Pfn[i] = pfn + pfnSum + i; | |
472 | } | |
473 | ||
474 | // add to msg header | |
475 | INSERT_TAIL_LIST(&msgHeader->SubMsgList, &msgBody->MsgListEntry); | |
476 | pfnSum += pfnCurr; | |
477 | pfnLeft -= pfnCurr; | |
478 | } | |
479 | } | |
480 | else | |
481 | { | |
482 | // everything fits in a header | |
59471438 | 483 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
e276a3a5 | 484 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
485 | msgHeader->MessageSize=msgSize; |
486 | ||
487 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
488 | gpaHeader->RangeCount = 1; | |
59471438 | 489 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
490 | gpaHeader->Range[0].ByteOffset = 0; |
491 | gpaHeader->Range[0].ByteCount = Size; | |
492 | for (i=0; i<pageCount; i++) | |
493 | { | |
494 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
495 | } | |
496 | ||
497 | *MsgInfo = msgHeader; | |
498 | *MessageCount = 1; | |
499 | } | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | ||
505 | /*++; | |
506 | ||
507 | Name: | |
508 | VmbusChannelEstablishGpadl() | |
509 | ||
510 | Description: | |
511 | Estabish a GPADL for the specified buffer | |
512 | ||
513 | --*/ | |
514 | int | |
515 | VmbusChannelEstablishGpadl( | |
516 | VMBUS_CHANNEL *Channel, | |
8282c400 | 517 | void * Kbuffer, // from kmalloc() |
4d643114 GKH |
518 | u32 Size, // page-size multiple |
519 | u32 *GpadlHandle | |
3e7ee490 HJ |
520 | ) |
521 | { | |
522 | int ret=0; | |
523 | VMBUS_CHANNEL_GPADL_HEADER* gpadlMsg; | |
524 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
525 | //VMBUS_CHANNEL_GPADL_CREATED* gpadlCreated; | |
526 | ||
527 | VMBUS_CHANNEL_MSGINFO *msgInfo; | |
528 | VMBUS_CHANNEL_MSGINFO *subMsgInfo; | |
529 | ||
4d643114 | 530 | u32 msgCount; |
3e7ee490 HJ |
531 | LIST_ENTRY* anchor; |
532 | LIST_ENTRY* curr; | |
4d643114 | 533 | u32 nextGpadlHandle; |
3e7ee490 HJ |
534 | |
535 | DPRINT_ENTER(VMBUS); | |
536 | ||
537 | nextGpadlHandle = gVmbusConnection.NextGpadlHandle; | |
538 | InterlockedIncrement((int*)&gVmbusConnection.NextGpadlHandle); | |
539 | ||
540 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
541 | ASSERT(msgInfo != NULL); | |
542 | ASSERT(msgCount >0); | |
543 | ||
544 | msgInfo->WaitEvent = WaitEventCreate(); | |
545 | gpadlMsg = (VMBUS_CHANNEL_GPADL_HEADER*)msgInfo->Msg; | |
546 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; | |
547 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
548 | gpadlMsg->Gpadl = nextGpadlHandle; | |
549 | ||
550 | DumpGpadlHeader(gpadlMsg); | |
551 | ||
552 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
553 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry); | |
554 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
555 | ||
556 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", Kbuffer, Size, msgCount); | |
557 | ||
558 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %d", msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
559 | ||
560 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
561 | if (ret != 0) | |
562 | { | |
563 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); | |
564 | goto Cleanup; | |
565 | } | |
566 | ||
567 | if (msgCount>1) | |
568 | { | |
569 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) | |
570 | { | |
571 | subMsgInfo = (VMBUS_CHANNEL_MSGINFO*) curr; | |
572 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)subMsgInfo->Msg; | |
573 | ||
574 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
575 | gpadlBody->Gpadl = nextGpadlHandle; | |
576 | ||
577 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %d", subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
578 | ||
579 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
580 | ret = VmbusPostMessage(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
581 | ASSERT(ret == 0); | |
582 | } | |
583 | } | |
584 | WaitEventWait(msgInfo->WaitEvent); | |
585 | ||
586 | // At this point, we received the gpadl created msg | |
587 | DPRINT_DBG(VMBUS, "Received GPADL created (relid %d, status %d handle %x)", | |
588 | Channel->OfferMsg.ChildRelId, | |
589 | msgInfo->Response.GpadlCreated.CreationStatus, | |
590 | gpadlMsg->Gpadl); | |
591 | ||
592 | *GpadlHandle = gpadlMsg->Gpadl; | |
593 | ||
594 | Cleanup: | |
595 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
596 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); | |
597 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
598 | ||
599 | WaitEventClose(msgInfo->WaitEvent); | |
600 | MemFree(msgInfo); | |
601 | ||
602 | DPRINT_EXIT(VMBUS); | |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
607 | ||
608 | ||
609 | /*++; | |
610 | ||
611 | Name: | |
612 | VmbusChannelTeardownGpadl() | |
613 | ||
614 | Description: | |
615 | Teardown the specified GPADL handle | |
616 | ||
617 | --*/ | |
618 | int | |
619 | VmbusChannelTeardownGpadl( | |
620 | VMBUS_CHANNEL *Channel, | |
4d643114 | 621 | u32 GpadlHandle |
3e7ee490 HJ |
622 | ) |
623 | { | |
624 | int ret=0; | |
625 | VMBUS_CHANNEL_GPADL_TEARDOWN *msg; | |
626 | VMBUS_CHANNEL_MSGINFO* info; | |
627 | ||
628 | DPRINT_ENTER(VMBUS); | |
629 | ||
630 | ASSERT(GpadlHandle != 0); | |
631 | ||
e40d37cc | 632 | info = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN), GFP_KERNEL); |
3e7ee490 HJ |
633 | ASSERT(info != NULL); |
634 | ||
635 | info->WaitEvent = WaitEventCreate(); | |
636 | ||
637 | msg = (VMBUS_CHANNEL_GPADL_TEARDOWN*)info->Msg; | |
638 | ||
639 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
640 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
641 | msg->Gpadl = GpadlHandle; | |
642 | ||
643 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
644 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); | |
645 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
646 | ||
647 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN)); | |
648 | if (ret != 0) | |
649 | { | |
650 | // TODO: | |
651 | } | |
652 | ||
653 | WaitEventWait(info->WaitEvent); | |
654 | ||
655 | // Received a torndown response | |
656 | SpinlockAcquire(gVmbusConnection.ChannelMsgLock); | |
657 | REMOVE_ENTRY_LIST(&info->MsgListEntry); | |
658 | SpinlockRelease(gVmbusConnection.ChannelMsgLock); | |
659 | ||
660 | WaitEventClose(info->WaitEvent); | |
661 | MemFree(info); | |
662 | ||
663 | DPRINT_EXIT(VMBUS); | |
664 | ||
665 | return ret; | |
666 | } | |
667 | ||
668 | ||
669 | /*++ | |
670 | ||
671 | Name: | |
672 | VmbusChannelClose() | |
673 | ||
674 | Description: | |
675 | Close the specified channel | |
676 | ||
677 | --*/ | |
e20f683b | 678 | void |
3e7ee490 HJ |
679 | VmbusChannelClose( |
680 | VMBUS_CHANNEL *Channel | |
681 | ) | |
682 | { | |
683 | int ret=0; | |
684 | VMBUS_CHANNEL_CLOSE_CHANNEL* msg; | |
685 | VMBUS_CHANNEL_MSGINFO* info; | |
686 | ||
687 | DPRINT_ENTER(VMBUS); | |
688 | ||
689 | // Stop callback and cancel the timer asap | |
690 | Channel->OnChannelCallback = NULL; | |
691 | TimerStop(Channel->PollTimer); | |
692 | ||
693 | // Send a closing message | |
e40d37cc | 694 | info = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
695 | ASSERT(info != NULL); |
696 | ||
697 | //info->waitEvent = WaitEventCreate(); | |
698 | ||
699 | msg = (VMBUS_CHANNEL_CLOSE_CHANNEL*)info->Msg; | |
700 | msg->Header.MessageType = ChannelMessageCloseChannel; | |
701 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
702 | ||
703 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL)); | |
704 | if (ret != 0) | |
705 | { | |
706 | // TODO: | |
707 | } | |
708 | ||
709 | // Tear down the gpadl for the channel's ring buffer | |
710 | if (Channel->RingBufferGpadlHandle) | |
711 | { | |
712 | VmbusChannelTeardownGpadl(Channel, Channel->RingBufferGpadlHandle); | |
713 | } | |
714 | ||
715 | // TODO: Send a msg to release the childRelId | |
716 | ||
717 | // Cleanup the ring buffers for this channel | |
718 | RingBufferCleanup(&Channel->Outbound); | |
719 | RingBufferCleanup(&Channel->Inbound); | |
720 | ||
721 | PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); | |
722 | ||
723 | MemFree(info); | |
724 | ||
725 | // If we are closing the channel during an error path in opening the channel, don't free the channel | |
726 | // since the caller will free the channel | |
727 | if (Channel->State == CHANNEL_OPEN_STATE) | |
728 | { | |
729 | SpinlockAcquire(gVmbusConnection.ChannelLock); | |
730 | REMOVE_ENTRY_LIST(&Channel->ListEntry); | |
731 | SpinlockRelease(gVmbusConnection.ChannelLock); | |
732 | ||
733 | FreeVmbusChannel(Channel); | |
734 | } | |
735 | ||
736 | DPRINT_EXIT(VMBUS); | |
737 | } | |
738 | ||
739 | ||
740 | /*++ | |
741 | ||
742 | Name: | |
743 | VmbusChannelSendPacket() | |
744 | ||
745 | Description: | |
746 | Send the specified buffer on the given channel | |
747 | ||
748 | --*/ | |
749 | int | |
750 | VmbusChannelSendPacket( | |
751 | VMBUS_CHANNEL *Channel, | |
8282c400 | 752 | const void * Buffer, |
4d643114 | 753 | u32 BufferLen, |
59471438 | 754 | u64 RequestId, |
3e7ee490 | 755 | VMBUS_PACKET_TYPE Type, |
4d643114 | 756 | u32 Flags |
3e7ee490 HJ |
757 | ) |
758 | { | |
759 | int ret=0; | |
760 | VMPACKET_DESCRIPTOR desc; | |
4d643114 | 761 | u32 packetLen = sizeof(VMPACKET_DESCRIPTOR) + BufferLen; |
59471438 | 762 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 763 | SG_BUFFER_LIST bufferList[3]; |
59471438 | 764 | u64 alignedData=0; |
3e7ee490 HJ |
765 | |
766 | DPRINT_ENTER(VMBUS); | |
767 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", Channel, Buffer, BufferLen); | |
768 | ||
769 | DumpVmbusChannel(Channel); | |
770 | ||
59471438 | 771 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 HJ |
772 | |
773 | // Setup the descriptor | |
774 | desc.Type = Type;//VmbusPacketTypeDataInBand; | |
775 | desc.Flags = Flags;//VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
776 | desc.DataOffset8 = sizeof(VMPACKET_DESCRIPTOR) >> 3; // in 8-bytes granularity | |
5cd508bc | 777 | desc.Length8 = (u16)(packetLenAligned >> 3); |
3e7ee490 HJ |
778 | desc.TransactionId = RequestId; |
779 | ||
780 | bufferList[0].Data = &desc; | |
781 | bufferList[0].Length = sizeof(VMPACKET_DESCRIPTOR); | |
782 | ||
783 | bufferList[1].Data = Buffer; | |
784 | bufferList[1].Length = BufferLen; | |
785 | ||
786 | bufferList[2].Data = &alignedData; | |
787 | bufferList[2].Length = packetLenAligned - packetLen; | |
788 | ||
789 | ret = RingBufferWrite( | |
790 | &Channel->Outbound, | |
791 | bufferList, | |
792 | 3); | |
793 | ||
794 | // TODO: We should determine if this is optional | |
795 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
796 | { | |
797 | VmbusChannelSetEvent(Channel); | |
798 | } | |
799 | ||
800 | DPRINT_EXIT(VMBUS); | |
801 | ||
802 | return ret; | |
803 | } | |
804 | ||
805 | ||
806 | /*++ | |
807 | ||
808 | Name: | |
809 | VmbusChannelSendPacketPageBuffer() | |
810 | ||
811 | Description: | |
812 | Send a range of single-page buffer packets using a GPADL Direct packet type. | |
813 | ||
814 | --*/ | |
815 | int | |
816 | VmbusChannelSendPacketPageBuffer( | |
817 | VMBUS_CHANNEL *Channel, | |
818 | PAGE_BUFFER PageBuffers[], | |
4d643114 | 819 | u32 PageCount, |
8282c400 | 820 | void * Buffer, |
4d643114 | 821 | u32 BufferLen, |
59471438 | 822 | u64 RequestId |
3e7ee490 HJ |
823 | ) |
824 | { | |
825 | int ret=0; | |
826 | int i=0; | |
827 | VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; | |
4d643114 GKH |
828 | u32 descSize; |
829 | u32 packetLen; | |
830 | u32 packetLenAligned; | |
3e7ee490 | 831 | SG_BUFFER_LIST bufferList[3]; |
59471438 | 832 | u64 alignedData=0; |
3e7ee490 HJ |
833 | |
834 | DPRINT_ENTER(VMBUS); | |
835 | ||
836 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
837 | ||
838 | DumpVmbusChannel(Channel); | |
839 | ||
840 | // Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the largest size we support | |
841 | descSize = sizeof(VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - ((MAX_PAGE_BUFFER_COUNT - PageCount)*sizeof(PAGE_BUFFER)); | |
842 | packetLen = descSize + BufferLen; | |
59471438 | 843 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 844 | |
59471438 | 845 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 HJ |
846 | |
847 | // Setup the descriptor | |
848 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; | |
849 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
850 | desc.DataOffset8 = descSize >> 3; // in 8-bytes grandularity | |
5cd508bc | 851 | desc.Length8 = (u16)(packetLenAligned >> 3); |
3e7ee490 HJ |
852 | desc.TransactionId = RequestId; |
853 | desc.RangeCount = PageCount; | |
854 | ||
855 | for (i=0; i<PageCount; i++) | |
856 | { | |
857 | desc.Range[i].Length = PageBuffers[i].Length; | |
858 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
859 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
860 | } | |
861 | ||
862 | bufferList[0].Data = &desc; | |
863 | bufferList[0].Length = descSize; | |
864 | ||
865 | bufferList[1].Data = Buffer; | |
866 | bufferList[1].Length = BufferLen; | |
867 | ||
868 | bufferList[2].Data = &alignedData; | |
869 | bufferList[2].Length = packetLenAligned - packetLen; | |
870 | ||
871 | ret = RingBufferWrite( | |
872 | &Channel->Outbound, | |
873 | bufferList, | |
874 | 3); | |
875 | ||
876 | // TODO: We should determine if this is optional | |
877 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
878 | { | |
879 | VmbusChannelSetEvent(Channel); | |
880 | } | |
881 | ||
882 | DPRINT_EXIT(VMBUS); | |
883 | ||
884 | return ret; | |
885 | } | |
886 | ||
887 | ||
888 | ||
889 | /*++ | |
890 | ||
891 | Name: | |
892 | VmbusChannelSendPacketMultiPageBuffer() | |
893 | ||
894 | Description: | |
895 | Send a multi-page buffer packet using a GPADL Direct packet type. | |
896 | ||
897 | --*/ | |
898 | int | |
899 | VmbusChannelSendPacketMultiPageBuffer( | |
900 | VMBUS_CHANNEL *Channel, | |
901 | MULTIPAGE_BUFFER *MultiPageBuffer, | |
8282c400 | 902 | void * Buffer, |
4d643114 | 903 | u32 BufferLen, |
59471438 | 904 | u64 RequestId |
3e7ee490 HJ |
905 | ) |
906 | { | |
907 | int ret=0; | |
908 | VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; | |
4d643114 GKH |
909 | u32 descSize; |
910 | u32 packetLen; | |
911 | u32 packetLenAligned; | |
3e7ee490 | 912 | SG_BUFFER_LIST bufferList[3]; |
59471438 | 913 | u64 alignedData=0; |
4d643114 | 914 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, MultiPageBuffer->Length); |
3e7ee490 HJ |
915 | |
916 | DPRINT_ENTER(VMBUS); | |
917 | ||
918 | DumpVmbusChannel(Channel); | |
919 | ||
920 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
921 | ||
922 | ASSERT(PfnCount > 0); | |
923 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
924 | ||
925 | // Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is the largest size we support | |
59471438 | 926 | descSize = sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount)*sizeof(u64)); |
3e7ee490 | 927 | packetLen = descSize + BufferLen; |
59471438 | 928 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 929 | |
59471438 | 930 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 HJ |
931 | |
932 | // Setup the descriptor | |
933 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; | |
934 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
935 | desc.DataOffset8 = descSize >> 3; // in 8-bytes grandularity | |
5cd508bc | 936 | desc.Length8 = (u16)(packetLenAligned >> 3); |
3e7ee490 HJ |
937 | desc.TransactionId = RequestId; |
938 | desc.RangeCount = 1; | |
939 | ||
940 | desc.Range.Length = MultiPageBuffer->Length; | |
941 | desc.Range.Offset = MultiPageBuffer->Offset; | |
942 | ||
59471438 | 943 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, PfnCount*sizeof(u64)); |
3e7ee490 HJ |
944 | |
945 | bufferList[0].Data = &desc; | |
946 | bufferList[0].Length = descSize; | |
947 | ||
948 | bufferList[1].Data = Buffer; | |
949 | bufferList[1].Length = BufferLen; | |
950 | ||
951 | bufferList[2].Data = &alignedData; | |
952 | bufferList[2].Length = packetLenAligned - packetLen; | |
953 | ||
954 | ret = RingBufferWrite( | |
955 | &Channel->Outbound, | |
956 | bufferList, | |
957 | 3); | |
958 | ||
959 | // TODO: We should determine if this is optional | |
960 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
961 | { | |
962 | VmbusChannelSetEvent(Channel); | |
963 | } | |
964 | ||
965 | DPRINT_EXIT(VMBUS); | |
966 | ||
967 | return ret; | |
968 | } | |
969 | ||
970 | ||
971 | /*++ | |
972 | ||
973 | Name: | |
974 | VmbusChannelRecvPacket() | |
975 | ||
976 | Description: | |
977 | Retrieve the user packet on the specified channel | |
978 | ||
979 | --*/ | |
980 | // TODO: Do we ever receive a gpa direct packet other than the ones we send ? | |
981 | int | |
982 | VmbusChannelRecvPacket( | |
983 | VMBUS_CHANNEL *Channel, | |
8282c400 | 984 | void * Buffer, |
4d643114 GKH |
985 | u32 BufferLen, |
986 | u32* BufferActualLen, | |
59471438 | 987 | u64* RequestId |
3e7ee490 HJ |
988 | ) |
989 | { | |
990 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
991 | u32 packetLen; |
992 | u32 userLen; | |
3e7ee490 HJ |
993 | int ret; |
994 | ||
995 | DPRINT_ENTER(VMBUS); | |
996 | ||
997 | *BufferActualLen = 0; | |
998 | *RequestId = 0; | |
999 | ||
1000 | SpinlockAcquire(Channel->InboundLock); | |
1001 | ||
1002 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1003 | if (ret != 0) | |
1004 | { | |
1005 | SpinlockRelease(Channel->InboundLock); | |
1006 | ||
1007 | //DPRINT_DBG(VMBUS, "nothing to read!!"); | |
1008 | DPRINT_EXIT(VMBUS); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | //VmbusChannelClearEvent(Channel); | |
1013 | ||
1014 | packetLen = desc.Length8 << 3; | |
1015 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1016 | //ASSERT(userLen > 0); | |
1017 | ||
1018 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1019 | Channel, | |
1020 | Channel->OfferMsg.ChildRelId, | |
1021 | desc.Type, | |
1022 | desc.Flags, | |
1023 | desc.TransactionId, packetLen, userLen); | |
1024 | ||
1025 | *BufferActualLen = userLen; | |
1026 | ||
1027 | if (userLen > BufferLen) | |
1028 | { | |
1029 | SpinlockRelease(Channel->InboundLock); | |
1030 | ||
1031 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", BufferLen, userLen); | |
1032 | DPRINT_EXIT(VMBUS); | |
1033 | ||
1034 | return -1; | |
1035 | } | |
1036 | ||
1037 | *RequestId = desc.TransactionId; | |
1038 | ||
1039 | // Copy over the packet to the user buffer | |
1040 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, (desc.DataOffset8 << 3)); | |
1041 | ||
1042 | SpinlockRelease(Channel->InboundLock); | |
1043 | ||
1044 | DPRINT_EXIT(VMBUS); | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | /*++ | |
1050 | ||
1051 | Name: | |
1052 | VmbusChannelRecvPacketRaw() | |
1053 | ||
1054 | Description: | |
1055 | Retrieve the raw packet on the specified channel | |
1056 | ||
1057 | --*/ | |
1058 | int | |
1059 | VmbusChannelRecvPacketRaw( | |
1060 | VMBUS_CHANNEL *Channel, | |
8282c400 | 1061 | void * Buffer, |
4d643114 GKH |
1062 | u32 BufferLen, |
1063 | u32* BufferActualLen, | |
59471438 | 1064 | u64* RequestId |
3e7ee490 HJ |
1065 | ) |
1066 | { | |
1067 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
1068 | u32 packetLen; |
1069 | u32 userLen; | |
3e7ee490 HJ |
1070 | int ret; |
1071 | ||
1072 | DPRINT_ENTER(VMBUS); | |
1073 | ||
1074 | *BufferActualLen = 0; | |
1075 | *RequestId = 0; | |
1076 | ||
1077 | SpinlockAcquire(Channel->InboundLock); | |
1078 | ||
1079 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1080 | if (ret != 0) | |
1081 | { | |
1082 | SpinlockRelease(Channel->InboundLock); | |
1083 | ||
1084 | //DPRINT_DBG(VMBUS, "nothing to read!!"); | |
1085 | DPRINT_EXIT(VMBUS); | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | //VmbusChannelClearEvent(Channel); | |
1090 | ||
1091 | packetLen = desc.Length8 << 3; | |
1092 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1093 | ||
1094 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1095 | Channel, | |
1096 | Channel->OfferMsg.ChildRelId, | |
1097 | desc.Type, | |
1098 | desc.Flags, | |
1099 | desc.TransactionId, packetLen, userLen); | |
1100 | ||
1101 | *BufferActualLen = packetLen; | |
1102 | ||
1103 | if (packetLen > BufferLen) | |
1104 | { | |
1105 | SpinlockRelease(Channel->InboundLock); | |
1106 | ||
1107 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but got space for only %d bytes", packetLen, BufferLen); | |
1108 | DPRINT_EXIT(VMBUS); | |
1109 | return -2; | |
1110 | } | |
1111 | ||
1112 | *RequestId = desc.TransactionId; | |
1113 | ||
1114 | // Copy over the entire packet to the user buffer | |
1115 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); | |
1116 | ||
1117 | SpinlockRelease(Channel->InboundLock); | |
1118 | ||
1119 | DPRINT_EXIT(VMBUS); | |
1120 | ||
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | ||
1125 | /*++ | |
1126 | ||
1127 | Name: | |
1128 | VmbusChannelOnChannelEvent() | |
1129 | ||
1130 | Description: | |
1131 | Channel event callback | |
1132 | ||
1133 | --*/ | |
1134 | void | |
1135 | VmbusChannelOnChannelEvent( | |
1136 | VMBUS_CHANNEL *Channel | |
1137 | ) | |
1138 | { | |
1139 | DumpVmbusChannel(Channel); | |
1140 | ASSERT(Channel->OnChannelCallback); | |
1141 | #ifdef ENABLE_POLLING | |
1142 | TimerStop(Channel->PollTimer); | |
1143 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1144 | TimerStart(Channel->PollTimer, 100 /* 100us */); | |
1145 | #else | |
1146 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1147 | #endif | |
1148 | } | |
1149 | ||
1150 | /*++ | |
1151 | ||
1152 | Name: | |
1153 | VmbusChannelOnTimer() | |
1154 | ||
1155 | Description: | |
1156 | Timer event callback | |
1157 | ||
1158 | --*/ | |
1159 | void | |
1160 | VmbusChannelOnTimer( | |
1161 | void *Context | |
1162 | ) | |
1163 | { | |
1164 | VMBUS_CHANNEL *channel = (VMBUS_CHANNEL*)Context; | |
1165 | ||
1166 | if (channel->OnChannelCallback) | |
1167 | { | |
1168 | channel->OnChannelCallback(channel->ChannelCallbackContext); | |
1169 | #ifdef ENABLE_POLLING | |
1170 | TimerStart(channel->PollTimer, 100 /* 100us */); | |
1171 | #endif | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | ||
1176 | /*++ | |
1177 | ||
1178 | Name: | |
1179 | DumpVmbusChannel() | |
1180 | ||
1181 | Description: | |
1182 | Dump vmbus channel info to the console | |
1183 | ||
1184 | --*/ | |
1185 | static void | |
1186 | DumpVmbusChannel( | |
1187 | VMBUS_CHANNEL *Channel | |
1188 | ) | |
1189 | { | |
1190 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1191 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1192 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1193 | } | |
1194 | ||
1195 | ||
1196 | // eof |