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> |
a0086dc5 | 25 | #include <linux/mm.h> |
4983b39a | 26 | #include "osd.h" |
09d50ff8 | 27 | #include "include/logging.h" |
3e7ee490 HJ |
28 | |
29 | #include "VmbusPrivate.h" | |
30 | ||
454f18a9 | 31 | /* Internal routines */ |
aded7165 | 32 | static int VmbusChannelCreateGpadlHeader( |
454f18a9 BP |
33 | void * Kbuffer, /* must be phys and virt contiguous */ |
34 | u32 Size, /* page-size multiple */ | |
aded7165 | 35 | struct vmbus_channel_msginfo **msgInfo, |
4d643114 | 36 | u32 *MessageCount |
3e7ee490 | 37 | ); |
aded7165 GKH |
38 | static void DumpVmbusChannel(struct vmbus_channel *channel); |
39 | static void VmbusChannelSetEvent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
40 | |
41 | ||
42 | #if 0 | |
43 | static void | |
44 | DumpMonitorPage( | |
45 | HV_MONITOR_PAGE *MonitorPage | |
46 | ) | |
47 | { | |
48 | int i=0; | |
49 | int j=0; | |
50 | ||
51 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", MonitorPage, MonitorPage->TriggerState); | |
52 | ||
53 | for (i=0; i<4; i++) | |
54 | { | |
55 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, MonitorPage->TriggerGroup[i].AsUINT64); | |
56 | } | |
57 | ||
58 | for (i=0; i<4; i++) | |
59 | { | |
60 | for (j=0; j<32; j++) | |
61 | { | |
62 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, MonitorPage->Latency[i][j]); | |
63 | } | |
64 | } | |
65 | for (i=0; i<4; i++) | |
66 | { | |
67 | for (j=0; j<32; j++) | |
68 | { | |
4d643114 | 69 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].ConnectionId.Asu32); |
3e7ee490 HJ |
70 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, MonitorPage->Parameter[i][j].FlagNumber); |
71 | ||
72 | } | |
73 | } | |
74 | } | |
75 | #endif | |
76 | ||
77 | /*++ | |
78 | ||
79 | Name: | |
80 | VmbusChannelSetEvent() | |
81 | ||
82 | Description: | |
83 | Trigger an event notification on the specified channel. | |
84 | ||
85 | --*/ | |
aded7165 | 86 | static void VmbusChannelSetEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
87 | { |
88 | HV_MONITOR_PAGE *monitorPage; | |
89 | ||
90 | DPRINT_ENTER(VMBUS); | |
91 | ||
92 | if (Channel->OfferMsg.MonitorAllocated) | |
93 | { | |
454f18a9 | 94 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
95 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
96 | (unsigned long *) gVmbusConnection.SendInterruptPage + | |
97 | (Channel->OfferMsg.ChildRelId >> 5) ); | |
3e7ee490 HJ |
98 | |
99 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
454f18a9 | 100 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 101 | |
7c369f40 BP |
102 | set_bit(Channel->MonitorBit, |
103 | (unsigned long *) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending); | |
104 | ||
3e7ee490 HJ |
105 | } |
106 | else | |
107 | { | |
108 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); | |
109 | } | |
110 | ||
111 | DPRINT_EXIT(VMBUS); | |
112 | } | |
113 | ||
114 | #if 0 | |
aded7165 | 115 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 HJ |
116 | { |
117 | HV_MONITOR_PAGE *monitorPage; | |
118 | ||
119 | DPRINT_ENTER(VMBUS); | |
120 | ||
121 | if (Channel->OfferMsg.MonitorAllocated) | |
122 | { | |
454f18a9 | 123 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
124 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
125 | (unsigned long *) gVmbusConnection.SendInterruptPage + (Channel->OfferMsg.ChildRelId >> 5)); | |
3e7ee490 HJ |
126 | |
127 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
454f18a9 | 128 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 129 | |
7c369f40 BP |
130 | clear_bit(Channel->MonitorBit, |
131 | (unsigned long *) &monitorPage->TriggerGroup[Channel->MonitorGroup].Pending); | |
3e7ee490 HJ |
132 | } |
133 | ||
134 | DPRINT_EXIT(VMBUS); | |
135 | } | |
136 | ||
137 | #endif | |
138 | /*++; | |
139 | ||
140 | Name: | |
141 | VmbusChannelGetDebugInfo() | |
142 | ||
143 | Description: | |
144 | Retrieve various channel debug info | |
145 | ||
146 | --*/ | |
aded7165 GKH |
147 | void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel, |
148 | struct vmbus_channel_debug_info *DebugInfo) | |
3e7ee490 HJ |
149 | { |
150 | HV_MONITOR_PAGE *monitorPage; | |
5654e932 GKH |
151 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
152 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 153 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 HJ |
154 | |
155 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
156 | DebugInfo->State = Channel->State; | |
caf26a31 GKH |
157 | memcpy(&DebugInfo->InterfaceType, &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); |
158 | memcpy(&DebugInfo->InterfaceInstance, &Channel->OfferMsg.Offer.InterfaceInstance, sizeof(struct hv_guid)); | |
3e7ee490 HJ |
159 | |
160 | monitorPage = (HV_MONITOR_PAGE*)gVmbusConnection.MonitorPages; | |
161 | ||
162 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
163 | ||
164 | DebugInfo->ServerMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; | |
165 | DebugInfo->ServerMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; | |
166 | DebugInfo->ServerMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; | |
167 | ||
168 | monitorPage++; | |
169 | ||
170 | DebugInfo->ClientMonitorPending = monitorPage->TriggerGroup[monitorGroup].Pending; | |
171 | DebugInfo->ClientMonitorLatency = monitorPage->Latency[monitorGroup][ monitorOffset]; | |
172 | DebugInfo->ClientMonitorConnectionId = monitorPage->Parameter[monitorGroup][ monitorOffset].ConnectionId.u.Id; | |
173 | ||
174 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
175 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
176 | } | |
177 | ||
178 | ||
179 | /*++; | |
180 | ||
181 | Name: | |
182 | VmbusChannelOpen() | |
183 | ||
184 | Description: | |
185 | Open the specified channel. | |
186 | ||
187 | --*/ | |
aded7165 | 188 | int VmbusChannelOpen(struct vmbus_channel *NewChannel, |
4d643114 GKH |
189 | u32 SendRingBufferSize, |
190 | u32 RecvRingBufferSize, | |
8282c400 | 191 | void * UserData, |
4d643114 | 192 | u32 UserDataLen, |
3e7ee490 | 193 | PFN_CHANNEL_CALLBACK pfnOnChannelCallback, |
8282c400 | 194 | void * Context |
3e7ee490 HJ |
195 | ) |
196 | { | |
197 | int ret=0; | |
198 | VMBUS_CHANNEL_OPEN_CHANNEL* openMsg; | |
aded7165 | 199 | struct vmbus_channel_msginfo *openInfo; |
3e7ee490 | 200 | void *in, *out; |
dd0813b6 | 201 | unsigned long flags; |
3e7ee490 HJ |
202 | |
203 | DPRINT_ENTER(VMBUS); | |
204 | ||
454f18a9 | 205 | /* Aligned to page size */ |
3e7ee490 HJ |
206 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE -1))); |
207 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE -1))); | |
208 | ||
209 | NewChannel->OnChannelCallback = pfnOnChannelCallback; | |
210 | NewChannel->ChannelCallbackContext = Context; | |
211 | ||
454f18a9 | 212 | /* Allocate the ring buffer */ |
bfc30aae | 213 | out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT); |
454f18a9 | 214 | /* out = kzalloc(sendRingBufferSize + recvRingBufferSize, GFP_KERNEL); */ |
3e7ee490 | 215 | ASSERT(out); |
c4b0bc94 | 216 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 217 | |
c4b0bc94 | 218 | in = (void*)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
219 | |
220 | NewChannel->RingBufferPages = out; | |
221 | NewChannel->RingBufferPageCount = (SendRingBufferSize + RecvRingBufferSize) >> PAGE_SHIFT; | |
222 | ||
223 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
224 | ||
225 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
226 | ||
454f18a9 | 227 | /* Establish the gpadl for the ring buffer */ |
3e7ee490 HJ |
228 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", NewChannel); |
229 | ||
230 | NewChannel->RingBufferGpadlHandle = 0; | |
231 | ||
232 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
233 | NewChannel->Outbound.RingBuffer, | |
234 | SendRingBufferSize + RecvRingBufferSize, | |
235 | &NewChannel->RingBufferGpadlHandle); | |
236 | ||
237 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p size %d recv ring %p size %d, downstreamoffset %d>", | |
238 | NewChannel, | |
239 | NewChannel->OfferMsg.ChildRelId, | |
240 | NewChannel->RingBufferGpadlHandle, | |
241 | NewChannel->Outbound.RingBuffer, | |
242 | NewChannel->Outbound.RingSize, | |
243 | NewChannel->Inbound.RingBuffer, | |
244 | NewChannel->Inbound.RingSize, | |
245 | SendRingBufferSize); | |
246 | ||
454f18a9 | 247 | /* Create and init the channel open message */ |
aded7165 | 248 | openInfo = kmalloc(sizeof(*openInfo) + sizeof(VMBUS_CHANNEL_OPEN_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
249 | ASSERT(openInfo != NULL); |
250 | ||
bfc30aae | 251 | openInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 HJ |
252 | |
253 | openMsg = (VMBUS_CHANNEL_OPEN_CHANNEL*)openInfo->Msg; | |
254 | openMsg->Header.MessageType = ChannelMessageOpenChannel; | |
454f18a9 | 255 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ |
3e7ee490 HJ |
256 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; |
257 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
258 | ASSERT(openMsg->RingBufferGpadlHandle); | |
259 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> PAGE_SHIFT; | |
454f18a9 | 260 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ |
3e7ee490 HJ |
261 | |
262 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
263 | if (UserDataLen) | |
264 | { | |
265 | memcpy(openMsg->UserData, UserData, UserDataLen); | |
266 | } | |
267 | ||
dd0813b6 | 268 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 269 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &openInfo->MsgListEntry); |
dd0813b6 | 270 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
271 | |
272 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
273 | ||
274 | ret = VmbusPostMessage(openMsg, sizeof(VMBUS_CHANNEL_OPEN_CHANNEL)); | |
275 | if (ret != 0) | |
276 | { | |
277 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); | |
278 | goto Cleanup; | |
279 | } | |
280 | ||
454f18a9 | 281 | /* FIXME: Need to time-out here */ |
bfc30aae | 282 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
283 | |
284 | if (openInfo->Response.OpenResult.Status == 0) | |
285 | { | |
286 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); | |
287 | } | |
288 | else | |
289 | { | |
290 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", NewChannel, openInfo->Response.OpenResult.Status); | |
291 | } | |
292 | ||
293 | Cleanup: | |
dd0813b6 | 294 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 295 | REMOVE_ENTRY_LIST(&openInfo->MsgListEntry); |
dd0813b6 | 296 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 297 | |
420beac4 | 298 | kfree(openInfo->WaitEvent); |
8c69f52a | 299 | kfree(openInfo); |
3e7ee490 HJ |
300 | |
301 | DPRINT_EXIT(VMBUS); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | /*++; | |
307 | ||
308 | Name: | |
309 | DumpGpadlBody() | |
310 | ||
311 | Description: | |
312 | Dump the gpadl body message to the console for debugging purposes. | |
313 | ||
314 | --*/ | |
315 | static void DumpGpadlBody( | |
316 | VMBUS_CHANNEL_GPADL_BODY *Gpadl, | |
4d643114 | 317 | u32 Len) |
3e7ee490 HJ |
318 | { |
319 | int i=0; | |
320 | int pfnCount=0; | |
321 | ||
59471438 | 322 | pfnCount = (Len - sizeof(VMBUS_CHANNEL_GPADL_BODY))/ sizeof(u64); |
3e7ee490 HJ |
323 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
324 | ||
325 | for (i=0; i< pfnCount; i++) | |
326 | { | |
327 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", i, Gpadl->Pfn[i]); | |
328 | } | |
329 | } | |
330 | ||
331 | ||
332 | /*++; | |
333 | ||
334 | Name: | |
335 | DumpGpadlHeader() | |
336 | ||
337 | Description: | |
338 | Dump the gpadl header message to the console for debugging purposes. | |
339 | ||
340 | --*/ | |
341 | static void DumpGpadlHeader( | |
342 | VMBUS_CHANNEL_GPADL_HEADER *Gpadl | |
343 | ) | |
344 | { | |
345 | int i=0,j=0; | |
346 | int pageCount=0; | |
347 | ||
348 | ||
349 | DPRINT_DBG(VMBUS, "gpadl header - relid %d, range count %d, range buflen %d", | |
350 | Gpadl->ChildRelId, | |
351 | Gpadl->RangeCount, | |
352 | Gpadl->RangeBufLen); | |
353 | for (i=0; i< Gpadl->RangeCount; i++) | |
354 | { | |
355 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; | |
356 | pageCount = (pageCount > 26)? 26 : pageCount; | |
357 | ||
358 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d page count %d", | |
359 | i, Gpadl->Range[i].ByteCount, Gpadl->Range[i].ByteOffset, pageCount); | |
360 | ||
361 | for (j=0; j< pageCount; j++) | |
362 | { | |
363 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, Gpadl->Range[i].PfnArray[j]); | |
364 | } | |
365 | } | |
366 | } | |
367 | ||
368 | /*++; | |
369 | ||
370 | Name: | |
371 | VmbusChannelCreateGpadlHeader() | |
372 | ||
373 | Description: | |
374 | Creates a gpadl for the specified buffer | |
375 | ||
376 | --*/ | |
377 | static int | |
378 | VmbusChannelCreateGpadlHeader( | |
454f18a9 BP |
379 | void * Kbuffer, /* from kmalloc() */ |
380 | u32 Size, /* page-size multiple */ | |
aded7165 | 381 | struct vmbus_channel_msginfo **MsgInfo, |
4d643114 | 382 | u32 *MessageCount) |
3e7ee490 HJ |
383 | { |
384 | int i; | |
385 | int pageCount; | |
386 | unsigned long long pfn; | |
387 | VMBUS_CHANNEL_GPADL_HEADER* gpaHeader; | |
388 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
aded7165 GKH |
389 | struct vmbus_channel_msginfo *msgHeader; |
390 | struct vmbus_channel_msginfo *msgBody; | |
4d643114 | 391 | u32 msgSize; |
3e7ee490 HJ |
392 | |
393 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
394 | ||
454f18a9 | 395 | /* ASSERT( (kbuffer & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 HJ |
396 | ASSERT( (Size & (PAGE_SIZE-1)) == 0); |
397 | ||
398 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 399 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 400 | |
454f18a9 | 401 | /* do we need a gpadl body msg */ |
3e7ee490 | 402 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_HEADER) - sizeof(GPA_RANGE); |
59471438 | 403 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 404 | |
454f18a9 | 405 | if (pageCount > pfnCount) /* we need a gpadl body */ |
3e7ee490 | 406 | { |
454f18a9 | 407 | /* fill in the header */ |
aded7165 | 408 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pfnCount*sizeof(u64); |
e276a3a5 | 409 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
410 | |
411 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); | |
412 | msgHeader->MessageSize=msgSize; | |
413 | ||
414 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
415 | gpaHeader->RangeCount = 1; | |
59471438 | 416 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
417 | gpaHeader->Range[0].ByteOffset = 0; |
418 | gpaHeader->Range[0].ByteCount = Size; | |
419 | for (i=0; i<pfnCount; i++) | |
420 | { | |
421 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
422 | } | |
423 | *MsgInfo = msgHeader; | |
424 | *MessageCount = 1; | |
425 | ||
426 | pfnSum = pfnCount; | |
427 | pfnLeft = pageCount - pfnCount; | |
428 | ||
454f18a9 | 429 | /* how many pfns can we fit */ |
3e7ee490 | 430 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(VMBUS_CHANNEL_GPADL_BODY); |
59471438 | 431 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 432 | |
454f18a9 | 433 | /* fill in the body */ |
3e7ee490 HJ |
434 | while (pfnLeft) |
435 | { | |
436 | if (pfnLeft > pfnCount) | |
437 | { | |
438 | pfnCurr = pfnCount; | |
439 | } | |
440 | else | |
441 | { | |
442 | pfnCurr = pfnLeft; | |
443 | } | |
444 | ||
aded7165 | 445 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(VMBUS_CHANNEL_GPADL_BODY) + pfnCurr*sizeof(u64); |
e276a3a5 | 446 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
447 | ASSERT(msgBody); |
448 | msgBody->MessageSize = msgSize; | |
449 | (*MessageCount)++; | |
450 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)msgBody->Msg; | |
451 | ||
454f18a9 BP |
452 | /* FIXME: Gpadl is u32 and we are using a pointer which could be 64-bit */ |
453 | /* gpadlBody->Gpadl = kbuffer; */ | |
3e7ee490 HJ |
454 | for (i=0; i<pfnCurr; i++) |
455 | { | |
456 | gpadlBody->Pfn[i] = pfn + pfnSum + i; | |
457 | } | |
458 | ||
454f18a9 | 459 | /* add to msg header */ |
3e7ee490 HJ |
460 | INSERT_TAIL_LIST(&msgHeader->SubMsgList, &msgBody->MsgListEntry); |
461 | pfnSum += pfnCurr; | |
462 | pfnLeft -= pfnCurr; | |
463 | } | |
464 | } | |
465 | else | |
466 | { | |
454f18a9 | 467 | /* everything fits in a header */ |
aded7165 | 468 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(VMBUS_CHANNEL_GPADL_HEADER) + sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
e276a3a5 | 469 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
470 | msgHeader->MessageSize=msgSize; |
471 | ||
472 | gpaHeader = (VMBUS_CHANNEL_GPADL_HEADER*)msgHeader->Msg; | |
473 | gpaHeader->RangeCount = 1; | |
59471438 | 474 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
475 | gpaHeader->Range[0].ByteOffset = 0; |
476 | gpaHeader->Range[0].ByteCount = Size; | |
477 | for (i=0; i<pageCount; i++) | |
478 | { | |
479 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
480 | } | |
481 | ||
482 | *MsgInfo = msgHeader; | |
483 | *MessageCount = 1; | |
484 | } | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | ||
490 | /*++; | |
491 | ||
492 | Name: | |
493 | VmbusChannelEstablishGpadl() | |
494 | ||
495 | Description: | |
496 | Estabish a GPADL for the specified buffer | |
497 | ||
498 | --*/ | |
aded7165 | 499 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, |
454f18a9 BP |
500 | void * Kbuffer, /* from kmalloc() */ |
501 | u32 Size, /* page-size multiple */ | |
4d643114 | 502 | u32 *GpadlHandle |
3e7ee490 HJ |
503 | ) |
504 | { | |
505 | int ret=0; | |
506 | VMBUS_CHANNEL_GPADL_HEADER* gpadlMsg; | |
507 | VMBUS_CHANNEL_GPADL_BODY* gpadlBody; | |
454f18a9 | 508 | /* VMBUS_CHANNEL_GPADL_CREATED* gpadlCreated; */ |
3e7ee490 | 509 | |
aded7165 GKH |
510 | struct vmbus_channel_msginfo *msgInfo; |
511 | struct vmbus_channel_msginfo *subMsgInfo; | |
3e7ee490 | 512 | |
4d643114 | 513 | u32 msgCount; |
3e7ee490 HJ |
514 | LIST_ENTRY* anchor; |
515 | LIST_ENTRY* curr; | |
4d643114 | 516 | u32 nextGpadlHandle; |
dd0813b6 | 517 | unsigned long flags; |
3e7ee490 HJ |
518 | |
519 | DPRINT_ENTER(VMBUS); | |
520 | ||
f4888417 BP |
521 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
522 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
523 | |
524 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
525 | ASSERT(msgInfo != NULL); | |
526 | ASSERT(msgCount >0); | |
527 | ||
bfc30aae | 528 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 HJ |
529 | gpadlMsg = (VMBUS_CHANNEL_GPADL_HEADER*)msgInfo->Msg; |
530 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; | |
531 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
532 | gpadlMsg->Gpadl = nextGpadlHandle; | |
533 | ||
534 | DumpGpadlHeader(gpadlMsg); | |
535 | ||
dd0813b6 | 536 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 537 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry); |
dd0813b6 | 538 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
539 | |
540 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", Kbuffer, Size, msgCount); | |
541 | ||
aded7165 | 542 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", msgInfo->MessageSize - sizeof(*msgInfo)); |
3e7ee490 | 543 | |
aded7165 | 544 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - sizeof(*msgInfo)); |
3e7ee490 HJ |
545 | if (ret != 0) |
546 | { | |
547 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); | |
548 | goto Cleanup; | |
549 | } | |
550 | ||
551 | if (msgCount>1) | |
552 | { | |
553 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) | |
554 | { | |
aded7165 | 555 | subMsgInfo = (struct vmbus_channel_msginfo*)curr; |
3e7ee490 HJ |
556 | gpadlBody = (VMBUS_CHANNEL_GPADL_BODY*)subMsgInfo->Msg; |
557 | ||
558 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
559 | gpadlBody->Gpadl = nextGpadlHandle; | |
560 | ||
aded7165 | 561 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", subMsgInfo->MessageSize - sizeof(*subMsgInfo)); |
3e7ee490 | 562 | |
aded7165 GKH |
563 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - sizeof(*subMsgInfo)); |
564 | ret = VmbusPostMessage(gpadlBody, subMsgInfo->MessageSize - sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
565 | ASSERT(ret == 0); |
566 | } | |
567 | } | |
bfc30aae | 568 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 569 | |
454f18a9 | 570 | /* At this point, we received the gpadl created msg */ |
3e7ee490 HJ |
571 | DPRINT_DBG(VMBUS, "Received GPADL created (relid %d, status %d handle %x)", |
572 | Channel->OfferMsg.ChildRelId, | |
573 | msgInfo->Response.GpadlCreated.CreationStatus, | |
574 | gpadlMsg->Gpadl); | |
575 | ||
576 | *GpadlHandle = gpadlMsg->Gpadl; | |
577 | ||
578 | Cleanup: | |
dd0813b6 | 579 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 580 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); |
dd0813b6 | 581 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 582 | |
420beac4 | 583 | kfree(msgInfo->WaitEvent); |
8c69f52a | 584 | kfree(msgInfo); |
3e7ee490 HJ |
585 | |
586 | DPRINT_EXIT(VMBUS); | |
587 | ||
588 | return ret; | |
589 | } | |
590 | ||
591 | ||
592 | ||
593 | /*++; | |
594 | ||
595 | Name: | |
596 | VmbusChannelTeardownGpadl() | |
597 | ||
598 | Description: | |
599 | Teardown the specified GPADL handle | |
600 | ||
601 | --*/ | |
aded7165 | 602 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 HJ |
603 | { |
604 | int ret=0; | |
605 | VMBUS_CHANNEL_GPADL_TEARDOWN *msg; | |
aded7165 | 606 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 607 | unsigned long flags; |
3e7ee490 HJ |
608 | |
609 | DPRINT_ENTER(VMBUS); | |
610 | ||
611 | ASSERT(GpadlHandle != 0); | |
612 | ||
aded7165 | 613 | info = kmalloc(sizeof(*info) + sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN), GFP_KERNEL); |
3e7ee490 HJ |
614 | ASSERT(info != NULL); |
615 | ||
bfc30aae | 616 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 HJ |
617 | |
618 | msg = (VMBUS_CHANNEL_GPADL_TEARDOWN*)info->Msg; | |
619 | ||
620 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
621 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
622 | msg->Gpadl = GpadlHandle; | |
623 | ||
dd0813b6 | 624 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 625 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); |
dd0813b6 | 626 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
627 | |
628 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_GPADL_TEARDOWN)); | |
629 | if (ret != 0) | |
630 | { | |
454f18a9 | 631 | /* TODO: */ |
3e7ee490 HJ |
632 | } |
633 | ||
bfc30aae | 634 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 635 | |
454f18a9 | 636 | /* Received a torndown response */ |
dd0813b6 | 637 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 638 | REMOVE_ENTRY_LIST(&info->MsgListEntry); |
dd0813b6 | 639 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 640 | |
420beac4 | 641 | kfree(info->WaitEvent); |
8c69f52a | 642 | kfree(info); |
3e7ee490 HJ |
643 | |
644 | DPRINT_EXIT(VMBUS); | |
645 | ||
646 | return ret; | |
647 | } | |
648 | ||
649 | ||
650 | /*++ | |
651 | ||
652 | Name: | |
653 | VmbusChannelClose() | |
654 | ||
655 | Description: | |
656 | Close the specified channel | |
657 | ||
658 | --*/ | |
aded7165 | 659 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 HJ |
660 | { |
661 | int ret=0; | |
662 | VMBUS_CHANNEL_CLOSE_CHANNEL* msg; | |
aded7165 | 663 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 664 | unsigned long flags; |
3e7ee490 HJ |
665 | |
666 | DPRINT_ENTER(VMBUS); | |
667 | ||
454f18a9 | 668 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 669 | Channel->OnChannelCallback = NULL; |
c8a429a4 | 670 | del_timer(&Channel->poll_timer); |
3e7ee490 | 671 | |
454f18a9 | 672 | /* Send a closing message */ |
aded7165 | 673 | info = kmalloc(sizeof(*info) + sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL), GFP_KERNEL); |
3e7ee490 HJ |
674 | ASSERT(info != NULL); |
675 | ||
bfc30aae | 676 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 HJ |
677 | |
678 | msg = (VMBUS_CHANNEL_CLOSE_CHANNEL*)info->Msg; | |
679 | msg->Header.MessageType = ChannelMessageCloseChannel; | |
680 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
681 | ||
682 | ret = VmbusPostMessage(msg, sizeof(VMBUS_CHANNEL_CLOSE_CHANNEL)); | |
683 | if (ret != 0) | |
684 | { | |
454f18a9 | 685 | /* TODO: */ |
3e7ee490 HJ |
686 | } |
687 | ||
454f18a9 | 688 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 HJ |
689 | if (Channel->RingBufferGpadlHandle) |
690 | { | |
691 | VmbusChannelTeardownGpadl(Channel, Channel->RingBufferGpadlHandle); | |
692 | } | |
693 | ||
454f18a9 | 694 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 695 | |
454f18a9 | 696 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
697 | RingBufferCleanup(&Channel->Outbound); |
698 | RingBufferCleanup(&Channel->Inbound); | |
699 | ||
bfc30aae | 700 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 701 | |
8c69f52a | 702 | kfree(info); |
3e7ee490 | 703 | |
454f18a9 BP |
704 | |
705 | /* | |
706 | * If we are closing the channel during an error path in | |
707 | * opening the channel, don't free the channel since the | |
708 | * caller will free the channel | |
709 | */ | |
710 | ||
3e7ee490 HJ |
711 | if (Channel->State == CHANNEL_OPEN_STATE) |
712 | { | |
0f5e44ca | 713 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 714 | REMOVE_ENTRY_LIST(&Channel->ListEntry); |
0f5e44ca | 715 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
716 | |
717 | FreeVmbusChannel(Channel); | |
718 | } | |
719 | ||
720 | DPRINT_EXIT(VMBUS); | |
721 | } | |
722 | ||
723 | ||
724 | /*++ | |
725 | ||
726 | Name: | |
727 | VmbusChannelSendPacket() | |
728 | ||
729 | Description: | |
730 | Send the specified buffer on the given channel | |
731 | ||
732 | --*/ | |
aded7165 | 733 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, |
8282c400 | 734 | const void * Buffer, |
4d643114 | 735 | u32 BufferLen, |
59471438 | 736 | u64 RequestId, |
3e7ee490 | 737 | VMBUS_PACKET_TYPE Type, |
4d643114 | 738 | u32 Flags |
3e7ee490 HJ |
739 | ) |
740 | { | |
741 | int ret=0; | |
742 | VMPACKET_DESCRIPTOR desc; | |
4d643114 | 743 | u32 packetLen = sizeof(VMPACKET_DESCRIPTOR) + BufferLen; |
59471438 | 744 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 745 | struct scatterlist bufferList[3]; |
59471438 | 746 | u64 alignedData=0; |
3e7ee490 HJ |
747 | |
748 | DPRINT_ENTER(VMBUS); | |
749 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", Channel, Buffer, BufferLen); | |
750 | ||
751 | DumpVmbusChannel(Channel); | |
752 | ||
59471438 | 753 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 754 | |
454f18a9 BP |
755 | /* Setup the descriptor */ |
756 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
757 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
758 | desc.DataOffset8 = sizeof(VMPACKET_DESCRIPTOR) >> 3; /* in 8-bytes granularity */ | |
759 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
760 | desc.TransactionId = RequestId; | |
3e7ee490 | 761 | |
b219b3f7 NP |
762 | sg_init_table(bufferList,3); |
763 | sg_set_buf(&bufferList[0], &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
764 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
765 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
766 | |
767 | ret = RingBufferWrite( | |
768 | &Channel->Outbound, | |
769 | bufferList, | |
770 | 3); | |
771 | ||
454f18a9 | 772 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
773 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
774 | { | |
775 | VmbusChannelSetEvent(Channel); | |
776 | } | |
777 | ||
778 | DPRINT_EXIT(VMBUS); | |
779 | ||
780 | return ret; | |
781 | } | |
782 | ||
783 | ||
784 | /*++ | |
785 | ||
786 | Name: | |
787 | VmbusChannelSendPacketPageBuffer() | |
788 | ||
789 | Description: | |
790 | Send a range of single-page buffer packets using a GPADL Direct packet type. | |
791 | ||
792 | --*/ | |
aded7165 | 793 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
3e7ee490 | 794 | PAGE_BUFFER PageBuffers[], |
4d643114 | 795 | u32 PageCount, |
8282c400 | 796 | void * Buffer, |
4d643114 | 797 | u32 BufferLen, |
59471438 | 798 | u64 RequestId |
3e7ee490 HJ |
799 | ) |
800 | { | |
801 | int ret=0; | |
802 | int i=0; | |
0cf4fa80 | 803 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
804 | u32 descSize; |
805 | u32 packetLen; | |
806 | u32 packetLenAligned; | |
b219b3f7 | 807 | struct scatterlist bufferList[3]; |
59471438 | 808 | u64 alignedData=0; |
3e7ee490 HJ |
809 | |
810 | DPRINT_ENTER(VMBUS); | |
811 | ||
812 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
813 | ||
814 | DumpVmbusChannel(Channel); | |
815 | ||
454f18a9 | 816 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the largest size we support */ |
0cf4fa80 | 817 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - ((MAX_PAGE_BUFFER_COUNT - PageCount)*sizeof(PAGE_BUFFER)); |
3e7ee490 | 818 | packetLen = descSize + BufferLen; |
59471438 | 819 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 820 | |
59471438 | 821 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 822 | |
454f18a9 | 823 | /* Setup the descriptor */ |
3e7ee490 HJ |
824 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
825 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
826 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
827 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
828 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
829 | desc.RangeCount = PageCount; |
830 | ||
831 | for (i=0; i<PageCount; i++) | |
832 | { | |
833 | desc.Range[i].Length = PageBuffers[i].Length; | |
834 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
835 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
836 | } | |
837 | ||
b219b3f7 NP |
838 | sg_init_table(bufferList,3); |
839 | sg_set_buf(&bufferList[0], &desc, descSize); | |
840 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
841 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
842 | |
843 | ret = RingBufferWrite( | |
844 | &Channel->Outbound, | |
845 | bufferList, | |
846 | 3); | |
847 | ||
454f18a9 | 848 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
849 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
850 | { | |
851 | VmbusChannelSetEvent(Channel); | |
852 | } | |
853 | ||
854 | DPRINT_EXIT(VMBUS); | |
855 | ||
856 | return ret; | |
857 | } | |
858 | ||
859 | ||
860 | ||
861 | /*++ | |
862 | ||
863 | Name: | |
864 | VmbusChannelSendPacketMultiPageBuffer() | |
865 | ||
866 | Description: | |
867 | Send a multi-page buffer packet using a GPADL Direct packet type. | |
868 | ||
869 | --*/ | |
aded7165 | 870 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
3e7ee490 | 871 | MULTIPAGE_BUFFER *MultiPageBuffer, |
8282c400 | 872 | void * Buffer, |
4d643114 | 873 | u32 BufferLen, |
59471438 | 874 | u64 RequestId |
3e7ee490 HJ |
875 | ) |
876 | { | |
877 | int ret=0; | |
3fcc523a | 878 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
879 | u32 descSize; |
880 | u32 packetLen; | |
881 | u32 packetLenAligned; | |
b219b3f7 | 882 | struct scatterlist bufferList[3]; |
59471438 | 883 | u64 alignedData=0; |
4d643114 | 884 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, MultiPageBuffer->Length); |
3e7ee490 HJ |
885 | |
886 | DPRINT_ENTER(VMBUS); | |
887 | ||
888 | DumpVmbusChannel(Channel); | |
889 | ||
890 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
891 | ||
892 | ASSERT(PfnCount > 0); | |
893 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
894 | ||
454f18a9 | 895 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is the largest size we support */ |
3fcc523a | 896 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount)*sizeof(u64)); |
3e7ee490 | 897 | packetLen = descSize + BufferLen; |
59471438 | 898 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 899 | |
59471438 | 900 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 901 | |
454f18a9 | 902 | /* Setup the descriptor */ |
3e7ee490 HJ |
903 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
904 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
905 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
906 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
907 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
908 | desc.RangeCount = 1; |
909 | ||
910 | desc.Range.Length = MultiPageBuffer->Length; | |
911 | desc.Range.Offset = MultiPageBuffer->Offset; | |
912 | ||
59471438 | 913 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, PfnCount*sizeof(u64)); |
3e7ee490 | 914 | |
b219b3f7 NP |
915 | sg_init_table(bufferList,3); |
916 | sg_set_buf(&bufferList[0], &desc, descSize); | |
917 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
918 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
919 | |
920 | ret = RingBufferWrite( | |
921 | &Channel->Outbound, | |
922 | bufferList, | |
923 | 3); | |
924 | ||
454f18a9 | 925 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
926 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
927 | { | |
928 | VmbusChannelSetEvent(Channel); | |
929 | } | |
930 | ||
931 | DPRINT_EXIT(VMBUS); | |
932 | ||
933 | return ret; | |
934 | } | |
935 | ||
936 | ||
937 | /*++ | |
938 | ||
939 | Name: | |
940 | VmbusChannelRecvPacket() | |
941 | ||
942 | Description: | |
943 | Retrieve the user packet on the specified channel | |
944 | ||
945 | --*/ | |
454f18a9 | 946 | /* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */ |
aded7165 | 947 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, |
46a05253 GKH |
948 | void *Buffer, |
949 | u32 BufferLen, | |
950 | u32 *BufferActualLen, | |
951 | u64 *RequestId) | |
3e7ee490 HJ |
952 | { |
953 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
954 | u32 packetLen; |
955 | u32 userLen; | |
3e7ee490 | 956 | int ret; |
54411c42 | 957 | unsigned long flags; |
3e7ee490 HJ |
958 | |
959 | DPRINT_ENTER(VMBUS); | |
960 | ||
961 | *BufferActualLen = 0; | |
962 | *RequestId = 0; | |
963 | ||
54411c42 | 964 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
965 | |
966 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
967 | if (ret != 0) | |
968 | { | |
54411c42 | 969 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 970 | |
454f18a9 | 971 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
972 | DPRINT_EXIT(VMBUS); |
973 | return 0; | |
974 | } | |
975 | ||
454f18a9 | 976 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
977 | |
978 | packetLen = desc.Length8 << 3; | |
979 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 980 | /* ASSERT(userLen > 0); */ |
3e7ee490 HJ |
981 | |
982 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
983 | Channel, | |
984 | Channel->OfferMsg.ChildRelId, | |
985 | desc.Type, | |
986 | desc.Flags, | |
987 | desc.TransactionId, packetLen, userLen); | |
988 | ||
989 | *BufferActualLen = userLen; | |
990 | ||
991 | if (userLen > BufferLen) | |
992 | { | |
54411c42 | 993 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
994 | |
995 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", BufferLen, userLen); | |
996 | DPRINT_EXIT(VMBUS); | |
997 | ||
998 | return -1; | |
999 | } | |
1000 | ||
1001 | *RequestId = desc.TransactionId; | |
1002 | ||
454f18a9 | 1003 | /* Copy over the packet to the user buffer */ |
3e7ee490 HJ |
1004 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, (desc.DataOffset8 << 3)); |
1005 | ||
54411c42 | 1006 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1007 | |
1008 | DPRINT_EXIT(VMBUS); | |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | /*++ | |
1014 | ||
1015 | Name: | |
1016 | VmbusChannelRecvPacketRaw() | |
1017 | ||
1018 | Description: | |
1019 | Retrieve the raw packet on the specified channel | |
1020 | ||
1021 | --*/ | |
aded7165 | 1022 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, |
8282c400 | 1023 | void * Buffer, |
4d643114 GKH |
1024 | u32 BufferLen, |
1025 | u32* BufferActualLen, | |
59471438 | 1026 | u64* RequestId |
3e7ee490 HJ |
1027 | ) |
1028 | { | |
1029 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
1030 | u32 packetLen; |
1031 | u32 userLen; | |
3e7ee490 | 1032 | int ret; |
54411c42 | 1033 | unsigned long flags; |
3e7ee490 HJ |
1034 | |
1035 | DPRINT_ENTER(VMBUS); | |
1036 | ||
1037 | *BufferActualLen = 0; | |
1038 | *RequestId = 0; | |
1039 | ||
54411c42 | 1040 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1041 | |
1042 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1043 | if (ret != 0) | |
1044 | { | |
54411c42 | 1045 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1046 | |
454f18a9 | 1047 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
1048 | DPRINT_EXIT(VMBUS); |
1049 | return 0; | |
1050 | } | |
1051 | ||
454f18a9 | 1052 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
1053 | |
1054 | packetLen = desc.Length8 << 3; | |
1055 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1056 | ||
1057 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1058 | Channel, | |
1059 | Channel->OfferMsg.ChildRelId, | |
1060 | desc.Type, | |
1061 | desc.Flags, | |
1062 | desc.TransactionId, packetLen, userLen); | |
1063 | ||
1064 | *BufferActualLen = packetLen; | |
1065 | ||
1066 | if (packetLen > BufferLen) | |
1067 | { | |
54411c42 | 1068 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1069 | |
1070 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but got space for only %d bytes", packetLen, BufferLen); | |
1071 | DPRINT_EXIT(VMBUS); | |
1072 | return -2; | |
1073 | } | |
1074 | ||
1075 | *RequestId = desc.TransactionId; | |
1076 | ||
454f18a9 | 1077 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
1078 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
1079 | ||
54411c42 | 1080 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1081 | |
1082 | DPRINT_EXIT(VMBUS); | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | ||
1088 | /*++ | |
1089 | ||
1090 | Name: | |
1091 | VmbusChannelOnChannelEvent() | |
1092 | ||
1093 | Description: | |
1094 | Channel event callback | |
1095 | ||
1096 | --*/ | |
aded7165 | 1097 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1098 | { |
1099 | DumpVmbusChannel(Channel); | |
1100 | ASSERT(Channel->OnChannelCallback); | |
1101 | #ifdef ENABLE_POLLING | |
c8a429a4 | 1102 | del_timer(&Channel->poll_timer); |
3e7ee490 | 1103 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
c8a429a4 GKH |
1104 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1105 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1106 | #else |
1107 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1108 | #endif | |
1109 | } | |
1110 | ||
1111 | /*++ | |
1112 | ||
1113 | Name: | |
1114 | VmbusChannelOnTimer() | |
1115 | ||
1116 | Description: | |
1117 | Timer event callback | |
1118 | ||
1119 | --*/ | |
46a05253 | 1120 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1121 | { |
aded7165 | 1122 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 HJ |
1123 | |
1124 | if (channel->OnChannelCallback) | |
1125 | { | |
1126 | channel->OnChannelCallback(channel->ChannelCallbackContext); | |
1127 | #ifdef ENABLE_POLLING | |
c8a429a4 GKH |
1128 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1129 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1130 | #endif |
1131 | } | |
1132 | } | |
1133 | ||
1134 | ||
1135 | /*++ | |
1136 | ||
1137 | Name: | |
1138 | DumpVmbusChannel() | |
1139 | ||
1140 | Description: | |
1141 | Dump vmbus channel info to the console | |
1142 | ||
1143 | --*/ | |
aded7165 | 1144 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1145 | { |
1146 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1147 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1148 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1149 | } | |
1150 | ||
1151 | ||
454f18a9 | 1152 | /* eof */ |