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 | ||
454f18a9 | 30 | /* Internal routines */ |
3e7ee490 HJ |
31 | static int |
32 | VmbusChannelCreateGpadlHeader( | |
454f18a9 BP |
33 | void * Kbuffer, /* must be phys and virt contiguous */ |
34 | u32 Size, /* page-size multiple */ | |
3e7ee490 | 35 | VMBUS_CHANNEL_MSGINFO **msgInfo, |
4d643114 | 36 | u32 *MessageCount |
3e7ee490 HJ |
37 | ); |
38 | ||
39 | static void | |
40 | DumpVmbusChannel( | |
41 | VMBUS_CHANNEL *Channel | |
42 | ); | |
43 | ||
44 | ||
45 | static void | |
46 | VmbusChannelSetEvent( | |
47 | VMBUS_CHANNEL *Channel | |
48 | ); | |
49 | ||
50 | ||
51 | #if 0 | |
52 | static void | |
53 | DumpMonitorPage( | |
54 | HV_MONITOR_PAGE *MonitorPage | |
55 | ) | |
56 | { | |
57 | int i=0; | |
58 | int j=0; | |
59 | ||
60 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", MonitorPage, MonitorPage->TriggerState); | |
61 | ||
62 | for (i=0; i<4; i++) | |
63 | { | |
64 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, MonitorPage->TriggerGroup[i].AsUINT64); | |
65 | } | |
66 | ||
67 | for (i=0; i<4; i++) | |
68 | { | |
69 | for (j=0; j<32; j++) | |
70 | { | |
71 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, MonitorPage->Latency[i][j]); | |
72 | } | |
73 | } | |
74 | for (i=0; i<4; i++) | |
75 | { | |
76 | for (j=0; j<32; j++) | |
77 | { | |
4d643114 | 78 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].ConnectionId.Asu32); |
3e7ee490 HJ |
79 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].FlagNumber); |
80 | ||
81 | } | |
82 | } | |
83 | } | |
84 | #endif | |
85 | ||
86 | /*++ | |
87 | ||
88 | Name: | |
89 | VmbusChannelSetEvent() | |
90 | ||
91 | Description: | |
92 | Trigger an event notification on the specified channel. | |
93 | ||
94 | --*/ | |
95 | static void | |
96 | VmbusChannelSetEvent( | |
97 | VMBUS_CHANNEL *Channel | |
98 | ) | |
99 | { | |
100 | HV_MONITOR_PAGE *monitorPage; | |
101 | ||
102 | DPRINT_ENTER(VMBUS); | |
103 | ||
104 | if (Channel->OfferMsg.MonitorAllocated) | |
105 | { | |
454f18a9 | 106 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
107 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
108 | (unsigned long *) gVmbusConnection.SendInterruptPage + | |
109 | (Channel->OfferMsg.ChildRelId >> 5) ); | |
3e7ee490 HJ |
110 | |
111 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
454f18a9 | 112 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 113 | |
7c369f40 BP |
114 | set_bit(Channel->MonitorBit, |
115 | (unsigned long *) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending); | |
116 | ||
3e7ee490 HJ |
117 | } |
118 | else | |
119 | { | |
120 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); | |
121 | } | |
122 | ||
123 | DPRINT_EXIT(VMBUS); | |
124 | } | |
125 | ||
126 | #if 0 | |
127 | static void | |
128 | VmbusChannelClearEvent( | |
129 | VMBUS_CHANNEL *Channel | |
130 | ) | |
131 | { | |
132 | HV_MONITOR_PAGE *monitorPage; | |
133 | ||
134 | DPRINT_ENTER(VMBUS); | |
135 | ||
136 | if (Channel->OfferMsg.MonitorAllocated) | |
137 | { | |
454f18a9 | 138 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
139 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
140 | (unsigned long *) gVmbusConnection.SendInterruptPage + (Channel->OfferMsg.ChildRelId >> 5)); | |
3e7ee490 HJ |
141 | |
142 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
454f18a9 | 143 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 144 | |
7c369f40 BP |
145 | clear_bit(Channel->MonitorBit, |
146 | (unsigned long *) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending); | |
3e7ee490 HJ |
147 | } |
148 | ||
149 | DPRINT_EXIT(VMBUS); | |
150 | } | |
151 | ||
152 | #endif | |
153 | /*++; | |
154 | ||
155 | Name: | |
156 | VmbusChannelGetDebugInfo() | |
157 | ||
158 | Description: | |
159 | Retrieve various channel debug info | |
160 | ||
161 | --*/ | |
bd1de709 | 162 | static void |
3e7ee490 HJ |
163 | VmbusChannelGetDebugInfo( |
164 | VMBUS_CHANNEL *Channel, | |
165 | VMBUS_CHANNEL_DEBUG_INFO *DebugInfo | |
166 | ) | |
167 | { | |
168 | HV_MONITOR_PAGE *monitorPage; | |
5654e932 GKH |
169 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
170 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 171 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 HJ |
172 | |
173 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
174 | DebugInfo->State = Channel->State; | |
175 | memcpy(&DebugInfo->InterfaceType, &Channel->OfferMsg.Offer.InterfaceType, sizeof(GUID)); | |
176 | memcpy(&DebugInfo->InterfaceInstance, &Channel->OfferMsg.Offer.InterfaceInstance, sizeof(GUID)); | |
177 | ||
178 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
179 | ||
180 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
181 | ||
182 | DebugInfo->ServerMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; | |
183 | DebugInfo->ServerMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; | |
184 | DebugInfo->ServerMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; | |
185 | ||
186 | monitorPage++; | |
187 | ||
188 | DebugInfo->ClientMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; | |
189 | DebugInfo->ClientMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; | |
190 | DebugInfo->ClientMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; | |
191 | ||
192 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
193 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
194 | } | |
195 | ||
196 | ||
197 | /*++; | |
198 | ||
199 | Name: | |
200 | VmbusChannelOpen() | |
201 | ||
202 | Description: | |
203 | Open the specified channel. | |
204 | ||
205 | --*/ | |
bd1de709 | 206 | static int |
3e7ee490 HJ |
207 | VmbusChannelOpen( |
208 | VMBUS_CHANNEL *NewChannel, | |
4d643114 GKH |
209 | u32 SendRingBufferSize, |
210 | u32 RecvRingBufferSize, | |
8282c400 | 211 | void * UserData, |
4d643114 | 212 | u32 UserDataLen, |
3e7ee490 | 213 | PFN_CHANNEL_CALLBACK pfnOnChannelCallback, |
8282c400 | 214 | void * Context |
3e7ee490 HJ |
215 | ) |
216 | { | |
217 | int ret=0; | |
218 | VMBUS_CHANNEL_OPEN_CHANNEL* openMsg; | |
219 | VMBUS_CHANNEL_MSGINFO* openInfo; | |
220 | void *in, *out; | |
dd0813b6 | 221 | unsigned long flags; |
3e7ee490 HJ |
222 | |
223 | DPRINT_ENTER(VMBUS); | |
224 | ||
454f18a9 | 225 | /* Aligned to page size */ |
3e7ee490 HJ |
226 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE -1))); |
227 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE -1))); | |
228 | ||
229 | NewChannel->OnChannelCallback = pfnOnChannelCallback; | |
230 | NewChannel->ChannelCallbackContext = Context; | |
231 | ||
454f18a9 | 232 | /* Allocate the ring buffer */ |
bfc30aae | 233 | out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT); |
454f18a9 | 234 | /* out = kzalloc(sendRingBufferSize + recvRingBufferSize, GFP_KERNEL); */ |
3e7ee490 | 235 | ASSERT(out); |
c4b0bc94 | 236 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 237 | |
c4b0bc94 | 238 | in = (void*)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
239 | |
240 | NewChannel->RingBufferPages = out; | |
241 | NewChannel->RingBufferPageCount = (SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT; | |
242 | ||
243 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
244 | ||
245 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
246 | ||
454f18a9 | 247 | /* Establish the gpadl for the ring buffer */ |
3e7ee490 HJ |
248 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", NewChannel); |
249 | ||
250 | NewChannel->RingBufferGpadlHandle = 0; | |
251 | ||
252 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
253 | NewChannel->Outbound.RingBuffer, | |
254 | SendRingBufferSize + RecvRingBufferSize, | |
255 | &NewChannel->RingBufferGpadlHandle); | |
256 | ||
257 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p size %d recv ring %p size %d, downstreamoffset %d>", | |
258 | NewChannel, | |
259 | NewChannel->OfferMsg.ChildRelId, | |
260 | NewChannel->RingBufferGpadlHandle, | |
261 | NewChannel->Outbound.RingBuffer, | |
262 | NewChannel->Outbound.RingSize, | |
263 | NewChannel->Inbound.RingBuffer, | |
264 | NewChannel->Inbound.RingSize, | |
265 | SendRingBufferSize); | |
266 | ||
454f18a9 | 267 | /* Create and init the channel open message */ |
e40d37cc | 268 | openInfo = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_OPEN_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
269 | ASSERT(openInfo != NULL); |
270 | ||
bfc30aae | 271 | openInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 HJ |
272 | |
273 | openMsg = (VMBUS_CHANNEL_OPEN_CHANNEL*)openInfo->Msg; | |
274 | openMsg->Header.MessageType = ChannelMessageOpenChannel; | |
454f18a9 | 275 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ |
3e7ee490 HJ |
276 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; |
277 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
278 | ASSERT(openMsg->RingBufferGpadlHandle); | |
279 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> PAGE_SHIFT; | |
454f18a9 | 280 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ |
3e7ee490 HJ |
281 | |
282 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
283 | if (UserDataLen) | |
284 | { | |
285 | memcpy(openMsg->UserData, UserData, UserDataLen); | |
286 | } | |
287 | ||
dd0813b6 | 288 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 289 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &openInfo->MsgListEntry); |
dd0813b6 | 290 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
291 | |
292 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
293 | ||
294 | ret = VmbusPostMessage(openMsg, sizeof(VMBUS_CHANNEL_OPEN_CHANNEL)); | |
295 | if (ret != 0) | |
296 | { | |
297 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); | |
298 | goto Cleanup; | |
299 | } | |
300 | ||
454f18a9 | 301 | /* FIXME: Need to time-out here */ |
bfc30aae | 302 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
303 | |
304 | if (openInfo->Response.OpenResult.Status == 0) | |
305 | { | |
306 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); | |
307 | } | |
308 | else | |
309 | { | |
310 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", NewChannel, openInfo->Response.OpenResult.Status); | |
311 | } | |
312 | ||
313 | Cleanup: | |
dd0813b6 | 314 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 315 | REMOVE_ENTRY_LIST(&openInfo->MsgListEntry); |
dd0813b6 | 316 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 317 | |
420beac4 | 318 | kfree(openInfo->WaitEvent); |
8c69f52a | 319 | kfree(openInfo); |
3e7ee490 HJ |
320 | |
321 | DPRINT_EXIT(VMBUS); | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | /*++; | |
327 | ||
328 | Name: | |
329 | DumpGpadlBody() | |
330 | ||
331 | Description: | |
332 | Dump the gpadl body message to the console for debugging purposes. | |
333 | ||
334 | --*/ | |
335 | static void DumpGpadlBody( | |
336 | VMBUS_CHANNEL_GPADL_BODY *Gpadl, | |
4d643114 | 337 | u32 Len) |
3e7ee490 HJ |
338 | { |
339 | int i=0; | |
340 | int pfnCount=0; | |
341 | ||
59471438 | 342 | pfnCount = (Len - sizeof(VMBUS_CHANNEL_GPADL_BODY))/ sizeof(u64); |
3e7ee490 HJ |
343 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
344 | ||
345 | for (i=0; i< pfnCount; i++) | |
346 | { | |
347 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", i, Gpadl->Pfn[i]); | |
348 | } | |
349 | } | |
350 | ||
351 | ||
352 | /*++; | |
353 | ||
354 | Name: | |
355 | DumpGpadlHeader() | |
356 | ||
357 | Description: | |
358 | Dump the gpadl header message to the console for debugging purposes. | |
359 | ||
360 | --*/ | |
361 | static void DumpGpadlHeader( | |
362 | VMBUS_CHANNEL_GPADL_HEADER *Gpadl | |
363 | ) | |
364 | { | |
365 | int i=0,j=0; | |
366 | int pageCount=0; | |
367 | ||
368 | ||
369 | DPRINT_DBG(VMBUS, "gpadl header - relid %d, range count %d, range buflen %d", | |
370 | Gpadl->ChildRelId, | |
371 | Gpadl->RangeCount, | |
372 | Gpadl->RangeBufLen); | |
373 | for (i=0; i< Gpadl->RangeCount; i++) | |
374 | { | |
375 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; | |
376 | pageCount = (pageCount > 26)? 26 : pageCount; | |
377 | ||
378 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d page count %d", | |
379 | i, Gpadl->Range[i].ByteCount, Gpadl->Range[i].ByteOffset, pageCount); | |
380 | ||
381 | for (j=0; j< pageCount; j++) | |
382 | { | |
383 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, Gpadl->Range[i].PfnArray[j]); | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | /*++; | |
389 | ||
390 | Name: | |
391 | VmbusChannelCreateGpadlHeader() | |
392 | ||
393 | Description: | |
394 | Creates a gpadl for the specified buffer | |
395 | ||
396 | --*/ | |
397 | static int | |
398 | VmbusChannelCreateGpadlHeader( | |
454f18a9 BP |
399 | void * Kbuffer, /* from kmalloc() */ |
400 | u32 Size, /* page-size multiple */ | |
3e7ee490 | 401 | VMBUS_CHANNEL_MSGINFO **MsgInfo, |
4d643114 | 402 | u32 *MessageCount) |
3e7ee490 HJ |
403 | { |
404 | int i; | |
405 | int pageCount; | |
406 | unsigned long long pfn; | |
407 | VMBUS_CHANNEL_GPADL_HEADER* gpaHeader; | |
408 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
409 | VMBUS_CHANNEL_MSGINFO* msgHeader; | |
410 | VMBUS_CHANNEL_MSGINFO* msgBody; | |
4d643114 | 411 | u32 msgSize; |
3e7ee490 HJ |
412 | |
413 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
414 | ||
454f18a9 | 415 | /* ASSERT( (kbuffer & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 HJ |
416 | ASSERT( (Size & (PAGE_SIZE-1)) == 0); |
417 | ||
418 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 419 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 420 | |
454f18a9 | 421 | /* do we need a gpadl body msg */ |
3e7ee490 | 422 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_HEADER) - sizeof(GPA_RANGE); |
59471438 | 423 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 424 | |
454f18a9 | 425 | if (pageCount > pfnCount) /* we need a gpadl body */ |
3e7ee490 | 426 | { |
454f18a9 | 427 | /* fill in the header */ |
59471438 | 428 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pfnCount*sizeof(u64); |
e276a3a5 | 429 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
430 | |
431 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); | |
432 | msgHeader->MessageSize=msgSize; | |
433 | ||
434 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
435 | gpaHeader->RangeCount = 1; | |
59471438 | 436 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
437 | gpaHeader->Range[0].ByteOffset = 0; |
438 | gpaHeader->Range[0].ByteCount = Size; | |
439 | for (i=0; i<pfnCount; i++) | |
440 | { | |
441 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
442 | } | |
443 | *MsgInfo = msgHeader; | |
444 | *MessageCount = 1; | |
445 | ||
446 | pfnSum = pfnCount; | |
447 | pfnLeft = pageCount - pfnCount; | |
448 | ||
454f18a9 | 449 | /* how many pfns can we fit */ |
3e7ee490 | 450 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_BODY); |
59471438 | 451 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 452 | |
454f18a9 | 453 | /* fill in the body */ |
3e7ee490 HJ |
454 | while (pfnLeft) |
455 | { | |
456 | if (pfnLeft > pfnCount) | |
457 | { | |
458 | pfnCurr = pfnCount; | |
459 | } | |
460 | else | |
461 | { | |
462 | pfnCurr = pfnLeft; | |
463 | } | |
464 | ||
59471438 | 465 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_BODY) + pfnCurr*sizeof(u64); |
e276a3a5 | 466 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
467 | ASSERT(msgBody); |
468 | msgBody->MessageSize = msgSize; | |
469 | (*MessageCount)++; | |
470 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)msgBody->Msg; | |
471 | ||
454f18a9 BP |
472 | /* FIXME: Gpadl is u32 and we are using a pointer which could be 64-bit */ |
473 | /* gpadlBody->Gpadl = kbuffer; */ | |
3e7ee490 HJ |
474 | for (i=0; i<pfnCurr; i++) |
475 | { | |
476 | gpadlBody->Pfn[i] = pfn + pfnSum + i; | |
477 | } | |
478 | ||
454f18a9 | 479 | /* add to msg header */ |
3e7ee490 HJ |
480 | INSERT_TAIL_LIST(&msgHeader->SubMsgList, &msgBody->MsgListEntry); |
481 | pfnSum += pfnCurr; | |
482 | pfnLeft -= pfnCurr; | |
483 | } | |
484 | } | |
485 | else | |
486 | { | |
454f18a9 | 487 | /* everything fits in a header */ |
59471438 | 488 | msgSize = sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
e276a3a5 | 489 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
490 | msgHeader->MessageSize=msgSize; |
491 | ||
492 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
493 | gpaHeader->RangeCount = 1; | |
59471438 | 494 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
495 | gpaHeader->Range[0].ByteOffset = 0; |
496 | gpaHeader->Range[0].ByteCount = Size; | |
497 | for (i=0; i<pageCount; i++) | |
498 | { | |
499 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
500 | } | |
501 | ||
502 | *MsgInfo = msgHeader; | |
503 | *MessageCount = 1; | |
504 | } | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | ||
510 | /*++; | |
511 | ||
512 | Name: | |
513 | VmbusChannelEstablishGpadl() | |
514 | ||
515 | Description: | |
516 | Estabish a GPADL for the specified buffer | |
517 | ||
518 | --*/ | |
bd1de709 | 519 | static int |
3e7ee490 HJ |
520 | VmbusChannelEstablishGpadl( |
521 | VMBUS_CHANNEL *Channel, | |
454f18a9 BP |
522 | void * Kbuffer, /* from kmalloc() */ |
523 | u32 Size, /* page-size multiple */ | |
4d643114 | 524 | u32 *GpadlHandle |
3e7ee490 HJ |
525 | ) |
526 | { | |
527 | int ret=0; | |
528 | VMBUS_CHANNEL_GPADL_HEADER* gpadlMsg; | |
529 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
454f18a9 | 530 | /* VMBUS_CHANNEL_GPADL_CREATED* gpadlCreated; */ |
3e7ee490 HJ |
531 | |
532 | VMBUS_CHANNEL_MSGINFO *msgInfo; | |
533 | VMBUS_CHANNEL_MSGINFO *subMsgInfo; | |
534 | ||
4d643114 | 535 | u32 msgCount; |
3e7ee490 HJ |
536 | LIST_ENTRY* anchor; |
537 | LIST_ENTRY* curr; | |
4d643114 | 538 | u32 nextGpadlHandle; |
dd0813b6 | 539 | unsigned long flags; |
3e7ee490 HJ |
540 | |
541 | DPRINT_ENTER(VMBUS); | |
542 | ||
f4888417 BP |
543 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
544 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
545 | |
546 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
547 | ASSERT(msgInfo != NULL); | |
548 | ASSERT(msgCount >0); | |
549 | ||
bfc30aae | 550 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 HJ |
551 | gpadlMsg = (VMBUS_CHANNEL_GPADL_HEADER*)msgInfo->Msg; |
552 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; | |
553 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
554 | gpadlMsg->Gpadl = nextGpadlHandle; | |
555 | ||
556 | DumpGpadlHeader(gpadlMsg); | |
557 | ||
dd0813b6 | 558 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 559 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry); |
dd0813b6 | 560 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
561 | |
562 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", Kbuffer, Size, msgCount); | |
563 | ||
b7d7ae6f | 564 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); |
3e7ee490 HJ |
565 | |
566 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
567 | if (ret != 0) | |
568 | { | |
569 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); | |
570 | goto Cleanup; | |
571 | } | |
572 | ||
573 | if (msgCount>1) | |
574 | { | |
575 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) | |
576 | { | |
577 | subMsgInfo = (VMBUS_CHANNEL_MSGINFO*) curr; | |
578 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)subMsgInfo->Msg; | |
579 | ||
580 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
581 | gpadlBody->Gpadl = nextGpadlHandle; | |
582 | ||
b7d7ae6f | 583 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); |
3e7ee490 HJ |
584 | |
585 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
586 | ret = VmbusPostMessage(gpadlBody, subMsgInfo->MessageSize - sizeof(VMBUS_CHANNEL_MSGINFO)); | |
587 | ASSERT(ret == 0); | |
588 | } | |
589 | } | |
bfc30aae | 590 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 591 | |
454f18a9 | 592 | /* At this point, we received the gpadl created msg */ |
3e7ee490 HJ |
593 | DPRINT_DBG(VMBUS, "Received GPADL created (relid %d, status %d handle %x)", |
594 | Channel->OfferMsg.ChildRelId, | |
595 | msgInfo->Response.GpadlCreated.CreationStatus, | |
596 | gpadlMsg->Gpadl); | |
597 | ||
598 | *GpadlHandle = gpadlMsg->Gpadl; | |
599 | ||
600 | Cleanup: | |
dd0813b6 | 601 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 602 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); |
dd0813b6 | 603 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 604 | |
420beac4 | 605 | kfree(msgInfo->WaitEvent); |
8c69f52a | 606 | kfree(msgInfo); |
3e7ee490 HJ |
607 | |
608 | DPRINT_EXIT(VMBUS); | |
609 | ||
610 | return ret; | |
611 | } | |
612 | ||
613 | ||
614 | ||
615 | /*++; | |
616 | ||
617 | Name: | |
618 | VmbusChannelTeardownGpadl() | |
619 | ||
620 | Description: | |
621 | Teardown the specified GPADL handle | |
622 | ||
623 | --*/ | |
bd1de709 | 624 | static int |
3e7ee490 HJ |
625 | VmbusChannelTeardownGpadl( |
626 | VMBUS_CHANNEL *Channel, | |
4d643114 | 627 | u32 GpadlHandle |
3e7ee490 HJ |
628 | ) |
629 | { | |
630 | int ret=0; | |
631 | VMBUS_CHANNEL_GPADL_TEARDOWN *msg; | |
632 | VMBUS_CHANNEL_MSGINFO* info; | |
dd0813b6 | 633 | unsigned long flags; |
3e7ee490 HJ |
634 | |
635 | DPRINT_ENTER(VMBUS); | |
636 | ||
637 | ASSERT(GpadlHandle != 0); | |
638 | ||
e40d37cc | 639 | info = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN), GFP_KERNEL); |
3e7ee490 HJ |
640 | ASSERT(info != NULL); |
641 | ||
bfc30aae | 642 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 HJ |
643 | |
644 | msg = (VMBUS_CHANNEL_GPADL_TEARDOWN*)info->Msg; | |
645 | ||
646 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
647 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
648 | msg->Gpadl = GpadlHandle; | |
649 | ||
dd0813b6 | 650 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 651 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); |
dd0813b6 | 652 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
653 | |
654 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN)); | |
655 | if (ret != 0) | |
656 | { | |
454f18a9 | 657 | /* TODO: */ |
3e7ee490 HJ |
658 | } |
659 | ||
bfc30aae | 660 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 661 | |
454f18a9 | 662 | /* Received a torndown response */ |
dd0813b6 | 663 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 664 | REMOVE_ENTRY_LIST(&info->MsgListEntry); |
dd0813b6 | 665 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 666 | |
420beac4 | 667 | kfree(info->WaitEvent); |
8c69f52a | 668 | kfree(info); |
3e7ee490 HJ |
669 | |
670 | DPRINT_EXIT(VMBUS); | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
675 | ||
676 | /*++ | |
677 | ||
678 | Name: | |
679 | VmbusChannelClose() | |
680 | ||
681 | Description: | |
682 | Close the specified channel | |
683 | ||
684 | --*/ | |
bd1de709 | 685 | static void |
3e7ee490 HJ |
686 | VmbusChannelClose( |
687 | VMBUS_CHANNEL *Channel | |
688 | ) | |
689 | { | |
690 | int ret=0; | |
691 | VMBUS_CHANNEL_CLOSE_CHANNEL* msg; | |
692 | VMBUS_CHANNEL_MSGINFO* info; | |
0f5e44ca | 693 | unsigned long flags; |
3e7ee490 HJ |
694 | |
695 | DPRINT_ENTER(VMBUS); | |
696 | ||
454f18a9 | 697 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 698 | Channel->OnChannelCallback = NULL; |
c8a429a4 | 699 | del_timer(&Channel->poll_timer); |
3e7ee490 | 700 | |
454f18a9 | 701 | /* Send a closing message */ |
e40d37cc | 702 | info = kmalloc(sizeof(VMBUS_CHANNEL_MSGINFO) + sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
703 | ASSERT(info != NULL); |
704 | ||
bfc30aae | 705 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 HJ |
706 | |
707 | msg = (VMBUS_CHANNEL_CLOSE_CHANNEL*)info->Msg; | |
708 | msg->Header.MessageType = ChannelMessageCloseChannel; | |
709 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
710 | ||
711 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL)); | |
712 | if (ret != 0) | |
713 | { | |
454f18a9 | 714 | /* TODO: */ |
3e7ee490 HJ |
715 | } |
716 | ||
454f18a9 | 717 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 HJ |
718 | if (Channel->RingBufferGpadlHandle) |
719 | { | |
720 | VmbusChannelTeardownGpadl(Channel, Channel->RingBufferGpadlHandle); | |
721 | } | |
722 | ||
454f18a9 | 723 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 724 | |
454f18a9 | 725 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
726 | RingBufferCleanup(&Channel->Outbound); |
727 | RingBufferCleanup(&Channel->Inbound); | |
728 | ||
bfc30aae | 729 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 730 | |
8c69f52a | 731 | kfree(info); |
3e7ee490 | 732 | |
454f18a9 BP |
733 | |
734 | /* | |
735 | * If we are closing the channel during an error path in | |
736 | * opening the channel, don't free the channel since the | |
737 | * caller will free the channel | |
738 | */ | |
739 | ||
3e7ee490 HJ |
740 | if (Channel->State == CHANNEL_OPEN_STATE) |
741 | { | |
0f5e44ca | 742 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 743 | REMOVE_ENTRY_LIST(&Channel->ListEntry); |
0f5e44ca | 744 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
745 | |
746 | FreeVmbusChannel(Channel); | |
747 | } | |
748 | ||
749 | DPRINT_EXIT(VMBUS); | |
750 | } | |
751 | ||
752 | ||
753 | /*++ | |
754 | ||
755 | Name: | |
756 | VmbusChannelSendPacket() | |
757 | ||
758 | Description: | |
759 | Send the specified buffer on the given channel | |
760 | ||
761 | --*/ | |
bd1de709 | 762 | static int |
3e7ee490 HJ |
763 | VmbusChannelSendPacket( |
764 | VMBUS_CHANNEL *Channel, | |
8282c400 | 765 | const void * Buffer, |
4d643114 | 766 | u32 BufferLen, |
59471438 | 767 | u64 RequestId, |
3e7ee490 | 768 | VMBUS_PACKET_TYPE Type, |
4d643114 | 769 | u32 Flags |
3e7ee490 HJ |
770 | ) |
771 | { | |
772 | int ret=0; | |
773 | VMPACKET_DESCRIPTOR desc; | |
4d643114 | 774 | u32 packetLen = sizeof(VMPACKET_DESCRIPTOR) + BufferLen; |
59471438 | 775 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 776 | struct scatterlist bufferList[3]; |
59471438 | 777 | u64 alignedData=0; |
3e7ee490 HJ |
778 | |
779 | DPRINT_ENTER(VMBUS); | |
780 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", Channel, Buffer, BufferLen); | |
781 | ||
782 | DumpVmbusChannel(Channel); | |
783 | ||
59471438 | 784 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 785 | |
454f18a9 BP |
786 | /* Setup the descriptor */ |
787 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
788 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
789 | desc.DataOffset8 = sizeof(VMPACKET_DESCRIPTOR) >> 3; /* in 8-bytes granularity */ | |
790 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
791 | desc.TransactionId = RequestId; | |
3e7ee490 | 792 | |
b219b3f7 NP |
793 | sg_init_table(bufferList,3); |
794 | sg_set_buf(&bufferList[0], &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
795 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
796 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
797 | |
798 | ret = RingBufferWrite( | |
799 | &Channel->Outbound, | |
800 | bufferList, | |
801 | 3); | |
802 | ||
454f18a9 | 803 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
804 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
805 | { | |
806 | VmbusChannelSetEvent(Channel); | |
807 | } | |
808 | ||
809 | DPRINT_EXIT(VMBUS); | |
810 | ||
811 | return ret; | |
812 | } | |
813 | ||
814 | ||
815 | /*++ | |
816 | ||
817 | Name: | |
818 | VmbusChannelSendPacketPageBuffer() | |
819 | ||
820 | Description: | |
821 | Send a range of single-page buffer packets using a GPADL Direct packet type. | |
822 | ||
823 | --*/ | |
bd1de709 | 824 | static int |
3e7ee490 HJ |
825 | VmbusChannelSendPacketPageBuffer( |
826 | VMBUS_CHANNEL *Channel, | |
827 | PAGE_BUFFER PageBuffers[], | |
4d643114 | 828 | u32 PageCount, |
8282c400 | 829 | void * Buffer, |
4d643114 | 830 | u32 BufferLen, |
59471438 | 831 | u64 RequestId |
3e7ee490 HJ |
832 | ) |
833 | { | |
834 | int ret=0; | |
835 | int i=0; | |
0cf4fa80 | 836 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
837 | u32 descSize; |
838 | u32 packetLen; | |
839 | u32 packetLenAligned; | |
b219b3f7 | 840 | struct scatterlist bufferList[3]; |
59471438 | 841 | u64 alignedData=0; |
3e7ee490 HJ |
842 | |
843 | DPRINT_ENTER(VMBUS); | |
844 | ||
845 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
846 | ||
847 | DumpVmbusChannel(Channel); | |
848 | ||
454f18a9 | 849 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the largest size we support */ |
0cf4fa80 | 850 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - ((MAX_PAGE_BUFFER_COUNT - PageCount)*sizeof(PAGE_BUFFER)); |
3e7ee490 | 851 | packetLen = descSize + BufferLen; |
59471438 | 852 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 853 | |
59471438 | 854 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 855 | |
454f18a9 | 856 | /* Setup the descriptor */ |
3e7ee490 HJ |
857 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
858 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
859 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
860 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
861 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
862 | desc.RangeCount = PageCount; |
863 | ||
864 | for (i=0; i<PageCount; i++) | |
865 | { | |
866 | desc.Range[i].Length = PageBuffers[i].Length; | |
867 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
868 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
869 | } | |
870 | ||
b219b3f7 NP |
871 | sg_init_table(bufferList,3); |
872 | sg_set_buf(&bufferList[0], &desc, descSize); | |
873 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
874 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
875 | |
876 | ret = RingBufferWrite( | |
877 | &Channel->Outbound, | |
878 | bufferList, | |
879 | 3); | |
880 | ||
454f18a9 | 881 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
882 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
883 | { | |
884 | VmbusChannelSetEvent(Channel); | |
885 | } | |
886 | ||
887 | DPRINT_EXIT(VMBUS); | |
888 | ||
889 | return ret; | |
890 | } | |
891 | ||
892 | ||
893 | ||
894 | /*++ | |
895 | ||
896 | Name: | |
897 | VmbusChannelSendPacketMultiPageBuffer() | |
898 | ||
899 | Description: | |
900 | Send a multi-page buffer packet using a GPADL Direct packet type. | |
901 | ||
902 | --*/ | |
bd1de709 | 903 | static int |
3e7ee490 HJ |
904 | VmbusChannelSendPacketMultiPageBuffer( |
905 | VMBUS_CHANNEL *Channel, | |
906 | MULTIPAGE_BUFFER *MultiPageBuffer, | |
8282c400 | 907 | void * Buffer, |
4d643114 | 908 | u32 BufferLen, |
59471438 | 909 | u64 RequestId |
3e7ee490 HJ |
910 | ) |
911 | { | |
912 | int ret=0; | |
3fcc523a | 913 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
914 | u32 descSize; |
915 | u32 packetLen; | |
916 | u32 packetLenAligned; | |
b219b3f7 | 917 | struct scatterlist bufferList[3]; |
59471438 | 918 | u64 alignedData=0; |
4d643114 | 919 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, MultiPageBuffer->Length); |
3e7ee490 HJ |
920 | |
921 | DPRINT_ENTER(VMBUS); | |
922 | ||
923 | DumpVmbusChannel(Channel); | |
924 | ||
925 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
926 | ||
927 | ASSERT(PfnCount > 0); | |
928 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
929 | ||
454f18a9 | 930 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is the largest size we support */ |
3fcc523a | 931 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount)*sizeof(u64)); |
3e7ee490 | 932 | packetLen = descSize + BufferLen; |
59471438 | 933 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 934 | |
59471438 | 935 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 936 | |
454f18a9 | 937 | /* Setup the descriptor */ |
3e7ee490 HJ |
938 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
939 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
940 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
941 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
942 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
943 | desc.RangeCount = 1; |
944 | ||
945 | desc.Range.Length = MultiPageBuffer->Length; | |
946 | desc.Range.Offset = MultiPageBuffer->Offset; | |
947 | ||
59471438 | 948 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, PfnCount*sizeof(u64)); |
3e7ee490 | 949 | |
b219b3f7 NP |
950 | sg_init_table(bufferList,3); |
951 | sg_set_buf(&bufferList[0], &desc, descSize); | |
952 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
953 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
954 | |
955 | ret = RingBufferWrite( | |
956 | &Channel->Outbound, | |
957 | bufferList, | |
958 | 3); | |
959 | ||
454f18a9 | 960 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
961 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
962 | { | |
963 | VmbusChannelSetEvent(Channel); | |
964 | } | |
965 | ||
966 | DPRINT_EXIT(VMBUS); | |
967 | ||
968 | return ret; | |
969 | } | |
970 | ||
971 | ||
972 | /*++ | |
973 | ||
974 | Name: | |
975 | VmbusChannelRecvPacket() | |
976 | ||
977 | Description: | |
978 | Retrieve the user packet on the specified channel | |
979 | ||
980 | --*/ | |
454f18a9 | 981 | /* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */ |
bd1de709 | 982 | static int |
3e7ee490 HJ |
983 | VmbusChannelRecvPacket( |
984 | VMBUS_CHANNEL *Channel, | |
8282c400 | 985 | void * Buffer, |
4d643114 GKH |
986 | u32 BufferLen, |
987 | u32* BufferActualLen, | |
59471438 | 988 | u64* RequestId |
3e7ee490 HJ |
989 | ) |
990 | { | |
991 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
992 | u32 packetLen; |
993 | u32 userLen; | |
3e7ee490 | 994 | int ret; |
54411c42 | 995 | unsigned long flags; |
3e7ee490 HJ |
996 | |
997 | DPRINT_ENTER(VMBUS); | |
998 | ||
999 | *BufferActualLen = 0; | |
1000 | *RequestId = 0; | |
1001 | ||
54411c42 | 1002 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1003 | |
1004 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1005 | if (ret != 0) | |
1006 | { | |
54411c42 | 1007 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1008 | |
454f18a9 | 1009 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
1010 | DPRINT_EXIT(VMBUS); |
1011 | return 0; | |
1012 | } | |
1013 | ||
454f18a9 | 1014 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
1015 | |
1016 | packetLen = desc.Length8 << 3; | |
1017 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 1018 | /* ASSERT(userLen > 0); */ |
3e7ee490 HJ |
1019 | |
1020 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1021 | Channel, | |
1022 | Channel->OfferMsg.ChildRelId, | |
1023 | desc.Type, | |
1024 | desc.Flags, | |
1025 | desc.TransactionId, packetLen, userLen); | |
1026 | ||
1027 | *BufferActualLen = userLen; | |
1028 | ||
1029 | if (userLen > BufferLen) | |
1030 | { | |
54411c42 | 1031 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1032 | |
1033 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", BufferLen, userLen); | |
1034 | DPRINT_EXIT(VMBUS); | |
1035 | ||
1036 | return -1; | |
1037 | } | |
1038 | ||
1039 | *RequestId = desc.TransactionId; | |
1040 | ||
454f18a9 | 1041 | /* Copy over the packet to the user buffer */ |
3e7ee490 HJ |
1042 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, (desc.DataOffset8 << 3)); |
1043 | ||
54411c42 | 1044 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1045 | |
1046 | DPRINT_EXIT(VMBUS); | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | /*++ | |
1052 | ||
1053 | Name: | |
1054 | VmbusChannelRecvPacketRaw() | |
1055 | ||
1056 | Description: | |
1057 | Retrieve the raw packet on the specified channel | |
1058 | ||
1059 | --*/ | |
bd1de709 | 1060 | static int |
3e7ee490 HJ |
1061 | VmbusChannelRecvPacketRaw( |
1062 | VMBUS_CHANNEL *Channel, | |
8282c400 | 1063 | void * Buffer, |
4d643114 GKH |
1064 | u32 BufferLen, |
1065 | u32* BufferActualLen, | |
59471438 | 1066 | u64* RequestId |
3e7ee490 HJ |
1067 | ) |
1068 | { | |
1069 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
1070 | u32 packetLen; |
1071 | u32 userLen; | |
3e7ee490 | 1072 | int ret; |
54411c42 | 1073 | unsigned long flags; |
3e7ee490 HJ |
1074 | |
1075 | DPRINT_ENTER(VMBUS); | |
1076 | ||
1077 | *BufferActualLen = 0; | |
1078 | *RequestId = 0; | |
1079 | ||
54411c42 | 1080 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1081 | |
1082 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1083 | if (ret != 0) | |
1084 | { | |
54411c42 | 1085 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1086 | |
454f18a9 | 1087 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
1088 | DPRINT_EXIT(VMBUS); |
1089 | return 0; | |
1090 | } | |
1091 | ||
454f18a9 | 1092 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
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 | { | |
54411c42 | 1108 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
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 | ||
454f18a9 | 1117 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
1118 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
1119 | ||
54411c42 | 1120 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
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 | --*/ | |
bd1de709 | 1137 | static void |
3e7ee490 HJ |
1138 | VmbusChannelOnChannelEvent( |
1139 | VMBUS_CHANNEL *Channel | |
1140 | ) | |
1141 | { | |
1142 | DumpVmbusChannel(Channel); | |
1143 | ASSERT(Channel->OnChannelCallback); | |
1144 | #ifdef ENABLE_POLLING | |
c8a429a4 | 1145 | del_timer(&Channel->poll_timer); |
3e7ee490 | 1146 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
c8a429a4 GKH |
1147 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1148 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1149 | #else |
1150 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1151 | #endif | |
1152 | } | |
1153 | ||
1154 | /*++ | |
1155 | ||
1156 | Name: | |
1157 | VmbusChannelOnTimer() | |
1158 | ||
1159 | Description: | |
1160 | Timer event callback | |
1161 | ||
1162 | --*/ | |
c8a429a4 | 1163 | static void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1164 | { |
c8a429a4 | 1165 | VMBUS_CHANNEL *channel = (VMBUS_CHANNEL*)data; |
3e7ee490 HJ |
1166 | |
1167 | if (channel->OnChannelCallback) | |
1168 | { | |
1169 | channel->OnChannelCallback(channel->ChannelCallbackContext); | |
1170 | #ifdef ENABLE_POLLING | |
c8a429a4 GKH |
1171 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1172 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1173 | #endif |
1174 | } | |
1175 | } | |
1176 | ||
1177 | ||
1178 | /*++ | |
1179 | ||
1180 | Name: | |
1181 | DumpVmbusChannel() | |
1182 | ||
1183 | Description: | |
1184 | Dump vmbus channel info to the console | |
1185 | ||
1186 | --*/ | |
1187 | static void | |
1188 | DumpVmbusChannel( | |
1189 | VMBUS_CHANNEL *Channel | |
1190 | ) | |
1191 | { | |
1192 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1193 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1194 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1195 | } | |
1196 | ||
1197 | ||
454f18a9 | 1198 | /* eof */ |