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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; | |
dd0813b6 | 217 | unsigned long flags; |
3e7ee490 HJ |
218 | |
219 | DPRINT_ENTER(VMBUS); | |
220 | ||
221 | // Aligned to page size | |
222 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE -1))); | |
223 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE -1))); | |
224 | ||
225 | NewChannel->OnChannelCallback = pfnOnChannelCallback; | |
226 | NewChannel->ChannelCallbackContext = Context; | |
227 | ||
228 | // Allocate the ring buffer | |
229 | out = PageAlloc((SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT); | |
e276a3a5 | 230 | //out = kzalloc(sendRingBufferSize + recvRingBufferSize, GFP_KERNEL); |
3e7ee490 | 231 | ASSERT(out); |
c4b0bc94 | 232 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 233 | |
c4b0bc94 | 234 | in = (void*)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
235 | |
236 | NewChannel->RingBufferPages = out; | |
237 | NewChannel->RingBufferPageCount = (SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT; | |
238 | ||
239 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
240 | ||
241 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
242 | ||
243 | // Establish the gpadl for the ring buffer | |
244 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", NewChannel); | |
245 | ||
246 | NewChannel->RingBufferGpadlHandle = 0; | |
247 | ||
248 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
249 | NewChannel->Outbound.RingBuffer, | |
250 | SendRingBufferSize + RecvRingBufferSize, | |
251 | &NewChannel->RingBufferGpadlHandle); | |
252 | ||
253 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p size %d recv ring %p size %d, downstreamoffset %d>", | |
254 | NewChannel, | |
255 | NewChannel->OfferMsg.ChildRelId, | |
256 | NewChannel->RingBufferGpadlHandle, | |
257 | NewChannel->Outbound.RingBuffer, | |
258 | NewChannel->Outbound.RingSize, | |
259 | NewChannel->Inbound.RingBuffer, | |
260 | NewChannel->Inbound.RingSize, | |
261 | SendRingBufferSize); | |
262 | ||
263 | // Create and init the channel open message | |
e40d37cc | 264 | openInfo = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_OPEN_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
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 | ||
dd0813b6 | 284 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 285 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &openInfo->MsgListEntry); |
dd0813b6 | 286 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
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: | |
dd0813b6 | 310 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 311 | REMOVE_ENTRY_LIST(&openInfo->MsgListEntry); |
dd0813b6 | 312 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
313 | |
314 | WaitEventClose(openInfo->WaitEvent); | |
8c69f52a | 315 | kfree(openInfo); |
3e7ee490 HJ |
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, | |
4d643114 | 333 | u32 Len) |
3e7ee490 HJ |
334 | { |
335 | int i=0; | |
336 | int pfnCount=0; | |
337 | ||
59471438 | 338 | pfnCount = (Len - sizeof(VMBUS_CHANNEL_GPADL_BODY))/ sizeof(u64); |
3e7ee490 HJ |
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( | |
8282c400 | 395 | void * Kbuffer, // from kmalloc() |
4d643114 | 396 | u32 Size, // page-size multiple |
3e7ee490 | 397 | VMBUS_CHANNEL_MSGINFO **MsgInfo, |
4d643114 | 398 | u32 *MessageCount) |
3e7ee490 HJ |
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; | |
4d643114 | 407 | u32 msgSize; |
3e7ee490 HJ |
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); | |
59471438 | 419 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 HJ |
420 | |
421 | if (pageCount > pfnCount) // we need a gpadl body | |
422 | { | |
423 | // fill in the header | |
59471438 | 424 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pfnCount*sizeof(u64); |
e276a3a5 | 425 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
426 | |
427 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); | |
428 | msgHeader->MessageSize=msgSize; | |
429 | ||
430 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
431 | gpaHeader->RangeCount = 1; | |
59471438 | 432 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
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); | |
59471438 | 447 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 HJ |
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 | ||
59471438 | 461 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_BODY) + pfnCurr*sizeof(u64); |
e276a3a5 | 462 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
463 | ASSERT(msgBody); |
464 | msgBody->MessageSize = msgSize; | |
465 | (*MessageCount)++; | |
466 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)msgBody->Msg; | |
467 | ||
4d643114 | 468 | // FIXME: Gpadl is u32 and we are using a pointer which could be 64-bit |
3e7ee490 HJ |
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 | |
59471438 | 484 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
e276a3a5 | 485 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
486 | msgHeader->MessageSize=msgSize; |
487 | ||
488 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
489 | gpaHeader->RangeCount = 1; | |
59471438 | 490 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
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, | |
8282c400 | 518 | void * Kbuffer, // from kmalloc() |
4d643114 GKH |
519 | u32 Size, // page-size multiple |
520 | u32 *GpadlHandle | |
3e7ee490 HJ |
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 | ||
4d643114 | 531 | u32 msgCount; |
3e7ee490 HJ |
532 | LIST_ENTRY* anchor; |
533 | LIST_ENTRY* curr; | |
4d643114 | 534 | u32 nextGpadlHandle; |
dd0813b6 | 535 | unsigned long flags; |
3e7ee490 HJ |
536 | |
537 | DPRINT_ENTER(VMBUS); | |
538 | ||
539 | nextGpadlHandle = gVmbusConnection.NextGpadlHandle; | |
540 | InterlockedIncrement((int*)&gVmbusConnection.NextGpadlHandle); | |
541 | ||
542 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
543 | ASSERT(msgInfo != NULL); | |
544 | ASSERT(msgCount >0); | |
545 | ||
546 | msgInfo->WaitEvent = WaitEventCreate(); | |
547 | gpadlMsg = (VMBUS_CHANNEL_GPADL_HEADER*)msgInfo->Msg; | |
548 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; | |
549 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
550 | gpadlMsg->Gpadl = nextGpadlHandle; | |
551 | ||
552 | DumpGpadlHeader(gpadlMsg); | |
553 | ||
dd0813b6 | 554 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 555 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry); |
dd0813b6 | 556 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
557 | |
558 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", Kbuffer, Size, msgCount); | |
559 | ||
226408a4 | 560 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %ld", msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); |
3e7ee490 HJ |
561 | |
562 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
563 | if (ret != 0) | |
564 | { | |
565 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); | |
566 | goto Cleanup; | |
567 | } | |
568 | ||
569 | if (msgCount>1) | |
570 | { | |
571 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) | |
572 | { | |
573 | subMsgInfo = (VMBUS_CHANNEL_MSGINFO*) curr; | |
574 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)subMsgInfo->Msg; | |
575 | ||
576 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
577 | gpadlBody->Gpadl = nextGpadlHandle; | |
578 | ||
226408a4 | 579 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %ld", subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); |
3e7ee490 HJ |
580 | |
581 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
582 | ret = VmbusPostMessage(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
583 | ASSERT(ret == 0); | |
584 | } | |
585 | } | |
586 | WaitEventWait(msgInfo->WaitEvent); | |
587 | ||
588 | // At this point, we received the gpadl created msg | |
589 | DPRINT_DBG(VMBUS, "Received GPADL created (relid %d, status %d handle %x)", | |
590 | Channel->OfferMsg.ChildRelId, | |
591 | msgInfo->Response.GpadlCreated.CreationStatus, | |
592 | gpadlMsg->Gpadl); | |
593 | ||
594 | *GpadlHandle = gpadlMsg->Gpadl; | |
595 | ||
596 | Cleanup: | |
dd0813b6 | 597 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 598 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); |
dd0813b6 | 599 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
600 | |
601 | WaitEventClose(msgInfo->WaitEvent); | |
8c69f52a | 602 | kfree(msgInfo); |
3e7ee490 HJ |
603 | |
604 | DPRINT_EXIT(VMBUS); | |
605 | ||
606 | return ret; | |
607 | } | |
608 | ||
609 | ||
610 | ||
611 | /*++; | |
612 | ||
613 | Name: | |
614 | VmbusChannelTeardownGpadl() | |
615 | ||
616 | Description: | |
617 | Teardown the specified GPADL handle | |
618 | ||
619 | --*/ | |
620 | int | |
621 | VmbusChannelTeardownGpadl( | |
622 | VMBUS_CHANNEL *Channel, | |
4d643114 | 623 | u32 GpadlHandle |
3e7ee490 HJ |
624 | ) |
625 | { | |
626 | int ret=0; | |
627 | VMBUS_CHANNEL_GPADL_TEARDOWN *msg; | |
628 | VMBUS_CHANNEL_MSGINFO* info; | |
dd0813b6 | 629 | unsigned long flags; |
3e7ee490 HJ |
630 | |
631 | DPRINT_ENTER(VMBUS); | |
632 | ||
633 | ASSERT(GpadlHandle != 0); | |
634 | ||
e40d37cc | 635 | info = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN), GFP_KERNEL); |
3e7ee490 HJ |
636 | ASSERT(info != NULL); |
637 | ||
638 | info->WaitEvent = WaitEventCreate(); | |
639 | ||
640 | msg = (VMBUS_CHANNEL_GPADL_TEARDOWN*)info->Msg; | |
641 | ||
642 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
643 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
644 | msg->Gpadl = GpadlHandle; | |
645 | ||
dd0813b6 | 646 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 647 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); |
dd0813b6 | 648 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
649 | |
650 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN)); | |
651 | if (ret != 0) | |
652 | { | |
653 | // TODO: | |
654 | } | |
655 | ||
656 | WaitEventWait(info->WaitEvent); | |
657 | ||
658 | // Received a torndown response | |
dd0813b6 | 659 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 660 | REMOVE_ENTRY_LIST(&info->MsgListEntry); |
dd0813b6 | 661 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
662 | |
663 | WaitEventClose(info->WaitEvent); | |
8c69f52a | 664 | kfree(info); |
3e7ee490 HJ |
665 | |
666 | DPRINT_EXIT(VMBUS); | |
667 | ||
668 | return ret; | |
669 | } | |
670 | ||
671 | ||
672 | /*++ | |
673 | ||
674 | Name: | |
675 | VmbusChannelClose() | |
676 | ||
677 | Description: | |
678 | Close the specified channel | |
679 | ||
680 | --*/ | |
e20f683b | 681 | void |
3e7ee490 HJ |
682 | VmbusChannelClose( |
683 | VMBUS_CHANNEL *Channel | |
684 | ) | |
685 | { | |
686 | int ret=0; | |
687 | VMBUS_CHANNEL_CLOSE_CHANNEL* msg; | |
688 | VMBUS_CHANNEL_MSGINFO* info; | |
0f5e44ca | 689 | unsigned long flags; |
3e7ee490 HJ |
690 | |
691 | DPRINT_ENTER(VMBUS); | |
692 | ||
693 | // Stop callback and cancel the timer asap | |
694 | Channel->OnChannelCallback = NULL; | |
695 | TimerStop(Channel->PollTimer); | |
696 | ||
697 | // Send a closing message | |
e40d37cc | 698 | info = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
699 | ASSERT(info != NULL); |
700 | ||
701 | //info->waitEvent = WaitEventCreate(); | |
702 | ||
703 | msg = (VMBUS_CHANNEL_CLOSE_CHANNEL*)info->Msg; | |
704 | msg->Header.MessageType = ChannelMessageCloseChannel; | |
705 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
706 | ||
707 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL)); | |
708 | if (ret != 0) | |
709 | { | |
710 | // TODO: | |
711 | } | |
712 | ||
713 | // Tear down the gpadl for the channel's ring buffer | |
714 | if (Channel->RingBufferGpadlHandle) | |
715 | { | |
716 | VmbusChannelTeardownGpadl(Channel, Channel->RingBufferGpadlHandle); | |
717 | } | |
718 | ||
719 | // TODO: Send a msg to release the childRelId | |
720 | ||
721 | // Cleanup the ring buffers for this channel | |
722 | RingBufferCleanup(&Channel->Outbound); | |
723 | RingBufferCleanup(&Channel->Inbound); | |
724 | ||
725 | PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); | |
726 | ||
8c69f52a | 727 | kfree(info); |
3e7ee490 HJ |
728 | |
729 | // If we are closing the channel during an error path in opening the channel, don't free the channel | |
730 | // since the caller will free the channel | |
731 | if (Channel->State == CHANNEL_OPEN_STATE) | |
732 | { | |
0f5e44ca | 733 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 734 | REMOVE_ENTRY_LIST(&Channel->ListEntry); |
0f5e44ca | 735 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
736 | |
737 | FreeVmbusChannel(Channel); | |
738 | } | |
739 | ||
740 | DPRINT_EXIT(VMBUS); | |
741 | } | |
742 | ||
743 | ||
744 | /*++ | |
745 | ||
746 | Name: | |
747 | VmbusChannelSendPacket() | |
748 | ||
749 | Description: | |
750 | Send the specified buffer on the given channel | |
751 | ||
752 | --*/ | |
753 | int | |
754 | VmbusChannelSendPacket( | |
755 | VMBUS_CHANNEL *Channel, | |
8282c400 | 756 | const void * Buffer, |
4d643114 | 757 | u32 BufferLen, |
59471438 | 758 | u64 RequestId, |
3e7ee490 | 759 | VMBUS_PACKET_TYPE Type, |
4d643114 | 760 | u32 Flags |
3e7ee490 HJ |
761 | ) |
762 | { | |
763 | int ret=0; | |
764 | VMPACKET_DESCRIPTOR desc; | |
4d643114 | 765 | u32 packetLen = sizeof(VMPACKET_DESCRIPTOR) + BufferLen; |
59471438 | 766 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 767 | SG_BUFFER_LIST bufferList[3]; |
59471438 | 768 | u64 alignedData=0; |
3e7ee490 HJ |
769 | |
770 | DPRINT_ENTER(VMBUS); | |
771 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", Channel, Buffer, BufferLen); | |
772 | ||
773 | DumpVmbusChannel(Channel); | |
774 | ||
59471438 | 775 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 HJ |
776 | |
777 | // Setup the descriptor | |
778 | desc.Type = Type;//VmbusPacketTypeDataInBand; | |
779 | desc.Flags = Flags;//VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
780 | desc.DataOffset8 = sizeof(VMPACKET_DESCRIPTOR) >> 3; // in 8-bytes granularity | |
5cd508bc | 781 | desc.Length8 = (u16)(packetLenAligned >> 3); |
3e7ee490 HJ |
782 | desc.TransactionId = RequestId; |
783 | ||
784 | bufferList[0].Data = &desc; | |
785 | bufferList[0].Length = sizeof(VMPACKET_DESCRIPTOR); | |
786 | ||
787 | bufferList[1].Data = Buffer; | |
788 | bufferList[1].Length = BufferLen; | |
789 | ||
790 | bufferList[2].Data = &alignedData; | |
791 | bufferList[2].Length = packetLenAligned - packetLen; | |
792 | ||
793 | ret = RingBufferWrite( | |
794 | &Channel->Outbound, | |
795 | bufferList, | |
796 | 3); | |
797 | ||
798 | // TODO: We should determine if this is optional | |
799 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
800 | { | |
801 | VmbusChannelSetEvent(Channel); | |
802 | } | |
803 | ||
804 | DPRINT_EXIT(VMBUS); | |
805 | ||
806 | return ret; | |
807 | } | |
808 | ||
809 | ||
810 | /*++ | |
811 | ||
812 | Name: | |
813 | VmbusChannelSendPacketPageBuffer() | |
814 | ||
815 | Description: | |
816 | Send a range of single-page buffer packets using a GPADL Direct packet type. | |
817 | ||
818 | --*/ | |
819 | int | |
820 | VmbusChannelSendPacketPageBuffer( | |
821 | VMBUS_CHANNEL *Channel, | |
822 | PAGE_BUFFER PageBuffers[], | |
4d643114 | 823 | u32 PageCount, |
8282c400 | 824 | void * Buffer, |
4d643114 | 825 | u32 BufferLen, |
59471438 | 826 | u64 RequestId |
3e7ee490 HJ |
827 | ) |
828 | { | |
829 | int ret=0; | |
830 | int i=0; | |
831 | VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; | |
4d643114 GKH |
832 | u32 descSize; |
833 | u32 packetLen; | |
834 | u32 packetLenAligned; | |
3e7ee490 | 835 | SG_BUFFER_LIST bufferList[3]; |
59471438 | 836 | u64 alignedData=0; |
3e7ee490 HJ |
837 | |
838 | DPRINT_ENTER(VMBUS); | |
839 | ||
840 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
841 | ||
842 | DumpVmbusChannel(Channel); | |
843 | ||
844 | // Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the largest size we support | |
845 | descSize = sizeof(VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - ((MAX_PAGE_BUFFER_COUNT - PageCount)*sizeof(PAGE_BUFFER)); | |
846 | packetLen = descSize + BufferLen; | |
59471438 | 847 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 848 | |
59471438 | 849 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 HJ |
850 | |
851 | // Setup the descriptor | |
852 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; | |
853 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
854 | desc.DataOffset8 = descSize >> 3; // in 8-bytes grandularity | |
5cd508bc | 855 | desc.Length8 = (u16)(packetLenAligned >> 3); |
3e7ee490 HJ |
856 | desc.TransactionId = RequestId; |
857 | desc.RangeCount = PageCount; | |
858 | ||
859 | for (i=0; i<PageCount; i++) | |
860 | { | |
861 | desc.Range[i].Length = PageBuffers[i].Length; | |
862 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
863 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
864 | } | |
865 | ||
866 | bufferList[0].Data = &desc; | |
867 | bufferList[0].Length = descSize; | |
868 | ||
869 | bufferList[1].Data = Buffer; | |
870 | bufferList[1].Length = BufferLen; | |
871 | ||
872 | bufferList[2].Data = &alignedData; | |
873 | bufferList[2].Length = packetLenAligned - packetLen; | |
874 | ||
875 | ret = RingBufferWrite( | |
876 | &Channel->Outbound, | |
877 | bufferList, | |
878 | 3); | |
879 | ||
880 | // TODO: We should determine if this is optional | |
881 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
882 | { | |
883 | VmbusChannelSetEvent(Channel); | |
884 | } | |
885 | ||
886 | DPRINT_EXIT(VMBUS); | |
887 | ||
888 | return ret; | |
889 | } | |
890 | ||
891 | ||
892 | ||
893 | /*++ | |
894 | ||
895 | Name: | |
896 | VmbusChannelSendPacketMultiPageBuffer() | |
897 | ||
898 | Description: | |
899 | Send a multi-page buffer packet using a GPADL Direct packet type. | |
900 | ||
901 | --*/ | |
902 | int | |
903 | VmbusChannelSendPacketMultiPageBuffer( | |
904 | VMBUS_CHANNEL *Channel, | |
905 | MULTIPAGE_BUFFER *MultiPageBuffer, | |
8282c400 | 906 | void * Buffer, |
4d643114 | 907 | u32 BufferLen, |
59471438 | 908 | u64 RequestId |
3e7ee490 HJ |
909 | ) |
910 | { | |
911 | int ret=0; | |
912 | VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; | |
4d643114 GKH |
913 | u32 descSize; |
914 | u32 packetLen; | |
915 | u32 packetLenAligned; | |
3e7ee490 | 916 | SG_BUFFER_LIST bufferList[3]; |
59471438 | 917 | u64 alignedData=0; |
4d643114 | 918 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, MultiPageBuffer->Length); |
3e7ee490 HJ |
919 | |
920 | DPRINT_ENTER(VMBUS); | |
921 | ||
922 | DumpVmbusChannel(Channel); | |
923 | ||
924 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
925 | ||
926 | ASSERT(PfnCount > 0); | |
927 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
928 | ||
929 | // Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is the largest size we support | |
59471438 | 930 | descSize = sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount)*sizeof(u64)); |
3e7ee490 | 931 | packetLen = descSize + BufferLen; |
59471438 | 932 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 933 | |
59471438 | 934 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 HJ |
935 | |
936 | // Setup the descriptor | |
937 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; | |
938 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
939 | desc.DataOffset8 = descSize >> 3; // in 8-bytes grandularity | |
5cd508bc | 940 | desc.Length8 = (u16)(packetLenAligned >> 3); |
3e7ee490 HJ |
941 | desc.TransactionId = RequestId; |
942 | desc.RangeCount = 1; | |
943 | ||
944 | desc.Range.Length = MultiPageBuffer->Length; | |
945 | desc.Range.Offset = MultiPageBuffer->Offset; | |
946 | ||
59471438 | 947 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, PfnCount*sizeof(u64)); |
3e7ee490 HJ |
948 | |
949 | bufferList[0].Data = &desc; | |
950 | bufferList[0].Length = descSize; | |
951 | ||
952 | bufferList[1].Data = Buffer; | |
953 | bufferList[1].Length = BufferLen; | |
954 | ||
955 | bufferList[2].Data = &alignedData; | |
956 | bufferList[2].Length = packetLenAligned - packetLen; | |
957 | ||
958 | ret = RingBufferWrite( | |
959 | &Channel->Outbound, | |
960 | bufferList, | |
961 | 3); | |
962 | ||
963 | // TODO: We should determine if this is optional | |
964 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) | |
965 | { | |
966 | VmbusChannelSetEvent(Channel); | |
967 | } | |
968 | ||
969 | DPRINT_EXIT(VMBUS); | |
970 | ||
971 | return ret; | |
972 | } | |
973 | ||
974 | ||
975 | /*++ | |
976 | ||
977 | Name: | |
978 | VmbusChannelRecvPacket() | |
979 | ||
980 | Description: | |
981 | Retrieve the user packet on the specified channel | |
982 | ||
983 | --*/ | |
984 | // TODO: Do we ever receive a gpa direct packet other than the ones we send ? | |
985 | int | |
986 | VmbusChannelRecvPacket( | |
987 | VMBUS_CHANNEL *Channel, | |
8282c400 | 988 | void * Buffer, |
4d643114 GKH |
989 | u32 BufferLen, |
990 | u32* BufferActualLen, | |
59471438 | 991 | u64* RequestId |
3e7ee490 HJ |
992 | ) |
993 | { | |
994 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
995 | u32 packetLen; |
996 | u32 userLen; | |
3e7ee490 | 997 | int ret; |
54411c42 | 998 | unsigned long flags; |
3e7ee490 HJ |
999 | |
1000 | DPRINT_ENTER(VMBUS); | |
1001 | ||
1002 | *BufferActualLen = 0; | |
1003 | *RequestId = 0; | |
1004 | ||
54411c42 | 1005 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1006 | |
1007 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1008 | if (ret != 0) | |
1009 | { | |
54411c42 | 1010 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1011 | |
1012 | //DPRINT_DBG(VMBUS, "nothing to read!!"); | |
1013 | DPRINT_EXIT(VMBUS); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | //VmbusChannelClearEvent(Channel); | |
1018 | ||
1019 | packetLen = desc.Length8 << 3; | |
1020 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1021 | //ASSERT(userLen > 0); | |
1022 | ||
1023 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1024 | Channel, | |
1025 | Channel->OfferMsg.ChildRelId, | |
1026 | desc.Type, | |
1027 | desc.Flags, | |
1028 | desc.TransactionId, packetLen, userLen); | |
1029 | ||
1030 | *BufferActualLen = userLen; | |
1031 | ||
1032 | if (userLen > BufferLen) | |
1033 | { | |
54411c42 | 1034 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1035 | |
1036 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", BufferLen, userLen); | |
1037 | DPRINT_EXIT(VMBUS); | |
1038 | ||
1039 | return -1; | |
1040 | } | |
1041 | ||
1042 | *RequestId = desc.TransactionId; | |
1043 | ||
1044 | // Copy over the packet to the user buffer | |
1045 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, (desc.DataOffset8 << 3)); | |
1046 | ||
54411c42 | 1047 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1048 | |
1049 | DPRINT_EXIT(VMBUS); | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | /*++ | |
1055 | ||
1056 | Name: | |
1057 | VmbusChannelRecvPacketRaw() | |
1058 | ||
1059 | Description: | |
1060 | Retrieve the raw packet on the specified channel | |
1061 | ||
1062 | --*/ | |
1063 | int | |
1064 | VmbusChannelRecvPacketRaw( | |
1065 | VMBUS_CHANNEL *Channel, | |
8282c400 | 1066 | void * Buffer, |
4d643114 GKH |
1067 | u32 BufferLen, |
1068 | u32* BufferActualLen, | |
59471438 | 1069 | u64* RequestId |
3e7ee490 HJ |
1070 | ) |
1071 | { | |
1072 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
1073 | u32 packetLen; |
1074 | u32 userLen; | |
3e7ee490 | 1075 | int ret; |
54411c42 | 1076 | unsigned long flags; |
3e7ee490 HJ |
1077 | |
1078 | DPRINT_ENTER(VMBUS); | |
1079 | ||
1080 | *BufferActualLen = 0; | |
1081 | *RequestId = 0; | |
1082 | ||
54411c42 | 1083 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1084 | |
1085 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1086 | if (ret != 0) | |
1087 | { | |
54411c42 | 1088 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1089 | |
1090 | //DPRINT_DBG(VMBUS, "nothing to read!!"); | |
1091 | DPRINT_EXIT(VMBUS); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | //VmbusChannelClearEvent(Channel); | |
1096 | ||
1097 | packetLen = desc.Length8 << 3; | |
1098 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1099 | ||
1100 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1101 | Channel, | |
1102 | Channel->OfferMsg.ChildRelId, | |
1103 | desc.Type, | |
1104 | desc.Flags, | |
1105 | desc.TransactionId, packetLen, userLen); | |
1106 | ||
1107 | *BufferActualLen = packetLen; | |
1108 | ||
1109 | if (packetLen > BufferLen) | |
1110 | { | |
54411c42 | 1111 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1112 | |
1113 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but got space for only %d bytes", packetLen, BufferLen); | |
1114 | DPRINT_EXIT(VMBUS); | |
1115 | return -2; | |
1116 | } | |
1117 | ||
1118 | *RequestId = desc.TransactionId; | |
1119 | ||
1120 | // Copy over the entire packet to the user buffer | |
1121 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); | |
1122 | ||
54411c42 | 1123 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1124 | |
1125 | DPRINT_EXIT(VMBUS); | |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | ||
1131 | /*++ | |
1132 | ||
1133 | Name: | |
1134 | VmbusChannelOnChannelEvent() | |
1135 | ||
1136 | Description: | |
1137 | Channel event callback | |
1138 | ||
1139 | --*/ | |
1140 | void | |
1141 | VmbusChannelOnChannelEvent( | |
1142 | VMBUS_CHANNEL *Channel | |
1143 | ) | |
1144 | { | |
1145 | DumpVmbusChannel(Channel); | |
1146 | ASSERT(Channel->OnChannelCallback); | |
1147 | #ifdef ENABLE_POLLING | |
1148 | TimerStop(Channel->PollTimer); | |
1149 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1150 | TimerStart(Channel->PollTimer, 100 /* 100us */); | |
1151 | #else | |
1152 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1153 | #endif | |
1154 | } | |
1155 | ||
1156 | /*++ | |
1157 | ||
1158 | Name: | |
1159 | VmbusChannelOnTimer() | |
1160 | ||
1161 | Description: | |
1162 | Timer event callback | |
1163 | ||
1164 | --*/ | |
1165 | void | |
1166 | VmbusChannelOnTimer( | |
1167 | void *Context | |
1168 | ) | |
1169 | { | |
1170 | VMBUS_CHANNEL *channel = (VMBUS_CHANNEL*)Context; | |
1171 | ||
1172 | if (channel->OnChannelCallback) | |
1173 | { | |
1174 | channel->OnChannelCallback(channel->ChannelCallbackContext); | |
1175 | #ifdef ENABLE_POLLING | |
1176 | TimerStart(channel->PollTimer, 100 /* 100us */); | |
1177 | #endif | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | ||
1182 | /*++ | |
1183 | ||
1184 | Name: | |
1185 | DumpVmbusChannel() | |
1186 | ||
1187 | Description: | |
1188 | Dump vmbus channel info to the console | |
1189 | ||
1190 | --*/ | |
1191 | static void | |
1192 | DumpVmbusChannel( | |
1193 | VMBUS_CHANNEL *Channel | |
1194 | ) | |
1195 | { | |
1196 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1197 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1198 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1199 | } | |
1200 | ||
1201 | ||
1202 | // eof |