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( | |
eacb1b4d | 45 | struct hv_monitor_page *MonitorPage |
3e7ee490 HJ |
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 | 87 | { |
eacb1b4d | 88 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
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 | 98 | |
eacb1b4d | 99 | monitorPage = (struct 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 | 116 | { |
eacb1b4d | 117 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
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 | 126 | |
eacb1b4d | 127 | monitorPage = (struct 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 | 149 | { |
eacb1b4d | 150 | struct 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 | 159 | |
eacb1b4d | 160 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 HJ |
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; | |
82250213 | 198 | struct 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 */ |
82250213 | 248 | openInfo = kmalloc(sizeof(*openInfo) + sizeof(struct vmbus_channel_open_channel), GFP_KERNEL); |
3e7ee490 HJ |
249 | ASSERT(openInfo != NULL); |
250 | ||
bfc30aae | 251 | openInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 252 | |
82250213 | 253 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
3e7ee490 | 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 | ||
82250213 | 274 | ret = VmbusPostMessage(openMsg, sizeof(struct vmbus_channel_open_channel)); |
3e7ee490 HJ |
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 | --*/ | |
82250213 | 315 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 HJ |
316 | { |
317 | int i=0; | |
318 | int pfnCount=0; | |
319 | ||
82250213 | 320 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body))/ sizeof(u64); |
3e7ee490 HJ |
321 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
322 | ||
323 | for (i=0; i< pfnCount; i++) | |
324 | { | |
325 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", i, Gpadl->Pfn[i]); | |
326 | } | |
327 | } | |
328 | ||
329 | ||
330 | /*++; | |
331 | ||
332 | Name: | |
333 | DumpGpadlHeader() | |
334 | ||
335 | Description: | |
336 | Dump the gpadl header message to the console for debugging purposes. | |
337 | ||
338 | --*/ | |
82250213 | 339 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 HJ |
340 | { |
341 | int i=0,j=0; | |
342 | int pageCount=0; | |
343 | ||
344 | ||
345 | DPRINT_DBG(VMBUS, "gpadl header - relid %d, range count %d, range buflen %d", | |
346 | Gpadl->ChildRelId, | |
347 | Gpadl->RangeCount, | |
348 | Gpadl->RangeBufLen); | |
349 | for (i=0; i< Gpadl->RangeCount; i++) | |
350 | { | |
351 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; | |
352 | pageCount = (pageCount > 26)? 26 : pageCount; | |
353 | ||
354 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d page count %d", | |
355 | i, Gpadl->Range[i].ByteCount, Gpadl->Range[i].ByteOffset, pageCount); | |
356 | ||
357 | for (j=0; j< pageCount; j++) | |
358 | { | |
359 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, Gpadl->Range[i].PfnArray[j]); | |
360 | } | |
361 | } | |
362 | } | |
363 | ||
364 | /*++; | |
365 | ||
366 | Name: | |
367 | VmbusChannelCreateGpadlHeader() | |
368 | ||
369 | Description: | |
370 | Creates a gpadl for the specified buffer | |
371 | ||
372 | --*/ | |
373 | static int | |
374 | VmbusChannelCreateGpadlHeader( | |
454f18a9 BP |
375 | void * Kbuffer, /* from kmalloc() */ |
376 | u32 Size, /* page-size multiple */ | |
aded7165 | 377 | struct vmbus_channel_msginfo **MsgInfo, |
4d643114 | 378 | u32 *MessageCount) |
3e7ee490 HJ |
379 | { |
380 | int i; | |
381 | int pageCount; | |
382 | unsigned long long pfn; | |
82250213 GKH |
383 | struct vmbus_channel_gpadl_header *gpaHeader; |
384 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 GKH |
385 | struct vmbus_channel_msginfo *msgHeader; |
386 | struct vmbus_channel_msginfo *msgBody; | |
4d643114 | 387 | u32 msgSize; |
3e7ee490 HJ |
388 | |
389 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
390 | ||
454f18a9 | 391 | /* ASSERT( (kbuffer & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 HJ |
392 | ASSERT( (Size & (PAGE_SIZE-1)) == 0); |
393 | ||
394 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 395 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 396 | |
454f18a9 | 397 | /* do we need a gpadl body msg */ |
82250213 | 398 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(struct vmbus_channel_gpadl_header) - sizeof(GPA_RANGE); |
59471438 | 399 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 400 | |
454f18a9 | 401 | if (pageCount > pfnCount) /* we need a gpadl body */ |
3e7ee490 | 402 | { |
454f18a9 | 403 | /* fill in the header */ |
82250213 | 404 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(struct vmbus_channel_gpadl_header) + sizeof(GPA_RANGE) + pfnCount*sizeof(u64); |
e276a3a5 | 405 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
406 | |
407 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); | |
408 | msgHeader->MessageSize=msgSize; | |
409 | ||
82250213 | 410 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 411 | gpaHeader->RangeCount = 1; |
59471438 | 412 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
413 | gpaHeader->Range[0].ByteOffset = 0; |
414 | gpaHeader->Range[0].ByteCount = Size; | |
415 | for (i=0; i<pfnCount; i++) | |
416 | { | |
417 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
418 | } | |
419 | *MsgInfo = msgHeader; | |
420 | *MessageCount = 1; | |
421 | ||
422 | pfnSum = pfnCount; | |
423 | pfnLeft = pageCount - pfnCount; | |
424 | ||
454f18a9 | 425 | /* how many pfns can we fit */ |
82250213 | 426 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - sizeof(struct vmbus_channel_gpadl_body); |
59471438 | 427 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 428 | |
454f18a9 | 429 | /* fill in the body */ |
3e7ee490 HJ |
430 | while (pfnLeft) |
431 | { | |
432 | if (pfnLeft > pfnCount) | |
433 | { | |
434 | pfnCurr = pfnCount; | |
435 | } | |
436 | else | |
437 | { | |
438 | pfnCurr = pfnLeft; | |
439 | } | |
440 | ||
82250213 | 441 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(struct vmbus_channel_gpadl_body) + pfnCurr*sizeof(u64); |
e276a3a5 | 442 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
443 | ASSERT(msgBody); |
444 | msgBody->MessageSize = msgSize; | |
445 | (*MessageCount)++; | |
82250213 | 446 | gpadlBody = (struct vmbus_channel_gpadl_body *)msgBody->Msg; |
3e7ee490 | 447 | |
454f18a9 BP |
448 | /* FIXME: Gpadl is u32 and we are using a pointer which could be 64-bit */ |
449 | /* gpadlBody->Gpadl = kbuffer; */ | |
3e7ee490 HJ |
450 | for (i=0; i<pfnCurr; i++) |
451 | { | |
452 | gpadlBody->Pfn[i] = pfn + pfnSum + i; | |
453 | } | |
454 | ||
454f18a9 | 455 | /* add to msg header */ |
3e7ee490 HJ |
456 | INSERT_TAIL_LIST(&msgHeader->SubMsgList, &msgBody->MsgListEntry); |
457 | pfnSum += pfnCurr; | |
458 | pfnLeft -= pfnCurr; | |
459 | } | |
460 | } | |
461 | else | |
462 | { | |
454f18a9 | 463 | /* everything fits in a header */ |
82250213 | 464 | msgSize = sizeof(struct vmbus_channel_msginfo) + sizeof(struct vmbus_channel_gpadl_header) + sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
e276a3a5 | 465 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
466 | msgHeader->MessageSize=msgSize; |
467 | ||
82250213 | 468 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 469 | gpaHeader->RangeCount = 1; |
59471438 | 470 | gpaHeader->RangeBufLen = sizeof(GPA_RANGE) + pageCount*sizeof(u64); |
3e7ee490 HJ |
471 | gpaHeader->Range[0].ByteOffset = 0; |
472 | gpaHeader->Range[0].ByteCount = Size; | |
473 | for (i=0; i<pageCount; i++) | |
474 | { | |
475 | gpaHeader->Range[0].PfnArray[i] = pfn+i; | |
476 | } | |
477 | ||
478 | *MsgInfo = msgHeader; | |
479 | *MessageCount = 1; | |
480 | } | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | ||
486 | /*++; | |
487 | ||
488 | Name: | |
489 | VmbusChannelEstablishGpadl() | |
490 | ||
491 | Description: | |
492 | Estabish a GPADL for the specified buffer | |
493 | ||
494 | --*/ | |
aded7165 | 495 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, |
454f18a9 BP |
496 | void * Kbuffer, /* from kmalloc() */ |
497 | u32 Size, /* page-size multiple */ | |
4d643114 | 498 | u32 *GpadlHandle |
3e7ee490 HJ |
499 | ) |
500 | { | |
501 | int ret=0; | |
82250213 GKH |
502 | struct vmbus_channel_gpadl_header *gpadlMsg; |
503 | struct vmbus_channel_gpadl_body *gpadlBody; | |
504 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
3e7ee490 | 505 | |
aded7165 GKH |
506 | struct vmbus_channel_msginfo *msgInfo; |
507 | struct vmbus_channel_msginfo *subMsgInfo; | |
3e7ee490 | 508 | |
4d643114 | 509 | u32 msgCount; |
3e7ee490 HJ |
510 | LIST_ENTRY* anchor; |
511 | LIST_ENTRY* curr; | |
4d643114 | 512 | u32 nextGpadlHandle; |
dd0813b6 | 513 | unsigned long flags; |
3e7ee490 HJ |
514 | |
515 | DPRINT_ENTER(VMBUS); | |
516 | ||
f4888417 BP |
517 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
518 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
519 | |
520 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
521 | ASSERT(msgInfo != NULL); | |
522 | ASSERT(msgCount >0); | |
523 | ||
bfc30aae | 524 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 525 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
526 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
527 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
528 | gpadlMsg->Gpadl = nextGpadlHandle; | |
529 | ||
530 | DumpGpadlHeader(gpadlMsg); | |
531 | ||
dd0813b6 | 532 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 533 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &msgInfo->MsgListEntry); |
dd0813b6 | 534 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
535 | |
536 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", Kbuffer, Size, msgCount); | |
537 | ||
aded7165 | 538 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", msgInfo->MessageSize - sizeof(*msgInfo)); |
3e7ee490 | 539 | |
aded7165 | 540 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - sizeof(*msgInfo)); |
3e7ee490 HJ |
541 | if (ret != 0) |
542 | { | |
543 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); | |
544 | goto Cleanup; | |
545 | } | |
546 | ||
547 | if (msgCount>1) | |
548 | { | |
549 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) | |
550 | { | |
82250213 GKH |
551 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
552 | gpadlBody = (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
553 | |
554 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
555 | gpadlBody->Gpadl = nextGpadlHandle; | |
556 | ||
aded7165 | 557 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", subMsgInfo->MessageSize - sizeof(*subMsgInfo)); |
3e7ee490 | 558 | |
aded7165 GKH |
559 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - sizeof(*subMsgInfo)); |
560 | ret = VmbusPostMessage(gpadlBody, subMsgInfo->MessageSize - sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
561 | ASSERT(ret == 0); |
562 | } | |
563 | } | |
bfc30aae | 564 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 565 | |
454f18a9 | 566 | /* At this point, we received the gpadl created msg */ |
3e7ee490 HJ |
567 | DPRINT_DBG(VMBUS, "Received GPADL created (relid %d, status %d handle %x)", |
568 | Channel->OfferMsg.ChildRelId, | |
569 | msgInfo->Response.GpadlCreated.CreationStatus, | |
570 | gpadlMsg->Gpadl); | |
571 | ||
572 | *GpadlHandle = gpadlMsg->Gpadl; | |
573 | ||
574 | Cleanup: | |
dd0813b6 | 575 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 576 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); |
dd0813b6 | 577 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 578 | |
420beac4 | 579 | kfree(msgInfo->WaitEvent); |
8c69f52a | 580 | kfree(msgInfo); |
3e7ee490 HJ |
581 | |
582 | DPRINT_EXIT(VMBUS); | |
583 | ||
584 | return ret; | |
585 | } | |
586 | ||
587 | ||
588 | ||
589 | /*++; | |
590 | ||
591 | Name: | |
592 | VmbusChannelTeardownGpadl() | |
593 | ||
594 | Description: | |
595 | Teardown the specified GPADL handle | |
596 | ||
597 | --*/ | |
aded7165 | 598 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 HJ |
599 | { |
600 | int ret=0; | |
82250213 | 601 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 602 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 603 | unsigned long flags; |
3e7ee490 HJ |
604 | |
605 | DPRINT_ENTER(VMBUS); | |
606 | ||
607 | ASSERT(GpadlHandle != 0); | |
608 | ||
82250213 | 609 | info = kmalloc(sizeof(*info) + sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); |
3e7ee490 HJ |
610 | ASSERT(info != NULL); |
611 | ||
bfc30aae | 612 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 613 | |
82250213 | 614 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
615 | |
616 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
617 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
618 | msg->Gpadl = GpadlHandle; | |
619 | ||
dd0813b6 | 620 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 621 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); |
dd0813b6 | 622 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 623 | |
82250213 | 624 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_gpadl_teardown)); |
3e7ee490 HJ |
625 | if (ret != 0) |
626 | { | |
454f18a9 | 627 | /* TODO: */ |
3e7ee490 HJ |
628 | } |
629 | ||
bfc30aae | 630 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 631 | |
454f18a9 | 632 | /* Received a torndown response */ |
dd0813b6 | 633 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 634 | REMOVE_ENTRY_LIST(&info->MsgListEntry); |
dd0813b6 | 635 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 636 | |
420beac4 | 637 | kfree(info->WaitEvent); |
8c69f52a | 638 | kfree(info); |
3e7ee490 HJ |
639 | |
640 | DPRINT_EXIT(VMBUS); | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
645 | ||
646 | /*++ | |
647 | ||
648 | Name: | |
649 | VmbusChannelClose() | |
650 | ||
651 | Description: | |
652 | Close the specified channel | |
653 | ||
654 | --*/ | |
aded7165 | 655 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 HJ |
656 | { |
657 | int ret=0; | |
82250213 | 658 | struct vmbus_channel_close_channel *msg; |
aded7165 | 659 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 660 | unsigned long flags; |
3e7ee490 HJ |
661 | |
662 | DPRINT_ENTER(VMBUS); | |
663 | ||
454f18a9 | 664 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 665 | Channel->OnChannelCallback = NULL; |
c8a429a4 | 666 | del_timer(&Channel->poll_timer); |
3e7ee490 | 667 | |
454f18a9 | 668 | /* Send a closing message */ |
82250213 | 669 | info = kmalloc(sizeof(*info) + sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); |
3e7ee490 HJ |
670 | ASSERT(info != NULL); |
671 | ||
bfc30aae | 672 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 673 | |
82250213 | 674 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
3e7ee490 HJ |
675 | msg->Header.MessageType = ChannelMessageCloseChannel; |
676 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
677 | ||
82250213 | 678 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
3e7ee490 HJ |
679 | if (ret != 0) |
680 | { | |
454f18a9 | 681 | /* TODO: */ |
3e7ee490 HJ |
682 | } |
683 | ||
454f18a9 | 684 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 HJ |
685 | if (Channel->RingBufferGpadlHandle) |
686 | { | |
687 | VmbusChannelTeardownGpadl(Channel, Channel->RingBufferGpadlHandle); | |
688 | } | |
689 | ||
454f18a9 | 690 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 691 | |
454f18a9 | 692 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
693 | RingBufferCleanup(&Channel->Outbound); |
694 | RingBufferCleanup(&Channel->Inbound); | |
695 | ||
bfc30aae | 696 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 697 | |
8c69f52a | 698 | kfree(info); |
3e7ee490 | 699 | |
454f18a9 BP |
700 | |
701 | /* | |
702 | * If we are closing the channel during an error path in | |
703 | * opening the channel, don't free the channel since the | |
704 | * caller will free the channel | |
705 | */ | |
706 | ||
3e7ee490 HJ |
707 | if (Channel->State == CHANNEL_OPEN_STATE) |
708 | { | |
0f5e44ca | 709 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 710 | REMOVE_ENTRY_LIST(&Channel->ListEntry); |
0f5e44ca | 711 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
712 | |
713 | FreeVmbusChannel(Channel); | |
714 | } | |
715 | ||
716 | DPRINT_EXIT(VMBUS); | |
717 | } | |
718 | ||
719 | ||
720 | /*++ | |
721 | ||
722 | Name: | |
723 | VmbusChannelSendPacket() | |
724 | ||
725 | Description: | |
726 | Send the specified buffer on the given channel | |
727 | ||
728 | --*/ | |
aded7165 | 729 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, |
8282c400 | 730 | const void * Buffer, |
4d643114 | 731 | u32 BufferLen, |
59471438 | 732 | u64 RequestId, |
3e7ee490 | 733 | VMBUS_PACKET_TYPE Type, |
4d643114 | 734 | u32 Flags |
3e7ee490 HJ |
735 | ) |
736 | { | |
737 | int ret=0; | |
738 | VMPACKET_DESCRIPTOR desc; | |
4d643114 | 739 | u32 packetLen = sizeof(VMPACKET_DESCRIPTOR) + BufferLen; |
59471438 | 740 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 741 | struct scatterlist bufferList[3]; |
59471438 | 742 | u64 alignedData=0; |
3e7ee490 HJ |
743 | |
744 | DPRINT_ENTER(VMBUS); | |
745 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", Channel, Buffer, BufferLen); | |
746 | ||
747 | DumpVmbusChannel(Channel); | |
748 | ||
59471438 | 749 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 750 | |
454f18a9 BP |
751 | /* Setup the descriptor */ |
752 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
753 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
754 | desc.DataOffset8 = sizeof(VMPACKET_DESCRIPTOR) >> 3; /* in 8-bytes granularity */ | |
755 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
756 | desc.TransactionId = RequestId; | |
3e7ee490 | 757 | |
b219b3f7 NP |
758 | sg_init_table(bufferList,3); |
759 | sg_set_buf(&bufferList[0], &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
760 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
761 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
762 | |
763 | ret = RingBufferWrite( | |
764 | &Channel->Outbound, | |
765 | bufferList, | |
766 | 3); | |
767 | ||
454f18a9 | 768 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
769 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
770 | { | |
771 | VmbusChannelSetEvent(Channel); | |
772 | } | |
773 | ||
774 | DPRINT_EXIT(VMBUS); | |
775 | ||
776 | return ret; | |
777 | } | |
778 | ||
779 | ||
780 | /*++ | |
781 | ||
782 | Name: | |
783 | VmbusChannelSendPacketPageBuffer() | |
784 | ||
785 | Description: | |
786 | Send a range of single-page buffer packets using a GPADL Direct packet type. | |
787 | ||
788 | --*/ | |
aded7165 | 789 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
ee3d7ddf | 790 | struct hv_page_buffer PageBuffers[], |
4d643114 | 791 | u32 PageCount, |
8282c400 | 792 | void * Buffer, |
4d643114 | 793 | u32 BufferLen, |
59471438 | 794 | u64 RequestId |
3e7ee490 HJ |
795 | ) |
796 | { | |
797 | int ret=0; | |
798 | int i=0; | |
0cf4fa80 | 799 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
800 | u32 descSize; |
801 | u32 packetLen; | |
802 | u32 packetLenAligned; | |
b219b3f7 | 803 | struct scatterlist bufferList[3]; |
59471438 | 804 | u64 alignedData=0; |
3e7ee490 HJ |
805 | |
806 | DPRINT_ENTER(VMBUS); | |
807 | ||
808 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
809 | ||
810 | DumpVmbusChannel(Channel); | |
811 | ||
454f18a9 | 812 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the largest size we support */ |
ee3d7ddf | 813 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - ((MAX_PAGE_BUFFER_COUNT - PageCount)*sizeof(struct hv_page_buffer)); |
3e7ee490 | 814 | packetLen = descSize + BufferLen; |
59471438 | 815 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 816 | |
59471438 | 817 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 818 | |
454f18a9 | 819 | /* Setup the descriptor */ |
3e7ee490 HJ |
820 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
821 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
822 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
823 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
824 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
825 | desc.RangeCount = PageCount; |
826 | ||
827 | for (i=0; i<PageCount; i++) | |
828 | { | |
829 | desc.Range[i].Length = PageBuffers[i].Length; | |
830 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
831 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
832 | } | |
833 | ||
b219b3f7 NP |
834 | sg_init_table(bufferList,3); |
835 | sg_set_buf(&bufferList[0], &desc, descSize); | |
836 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
837 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
838 | |
839 | ret = RingBufferWrite( | |
840 | &Channel->Outbound, | |
841 | bufferList, | |
842 | 3); | |
843 | ||
454f18a9 | 844 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
845 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
846 | { | |
847 | VmbusChannelSetEvent(Channel); | |
848 | } | |
849 | ||
850 | DPRINT_EXIT(VMBUS); | |
851 | ||
852 | return ret; | |
853 | } | |
854 | ||
855 | ||
856 | ||
857 | /*++ | |
858 | ||
859 | Name: | |
860 | VmbusChannelSendPacketMultiPageBuffer() | |
861 | ||
862 | Description: | |
863 | Send a multi-page buffer packet using a GPADL Direct packet type. | |
864 | ||
865 | --*/ | |
aded7165 | 866 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
ee3d7ddf | 867 | struct hv_multipage_buffer *MultiPageBuffer, |
8282c400 | 868 | void * Buffer, |
4d643114 | 869 | u32 BufferLen, |
59471438 | 870 | u64 RequestId |
3e7ee490 HJ |
871 | ) |
872 | { | |
873 | int ret=0; | |
3fcc523a | 874 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
875 | u32 descSize; |
876 | u32 packetLen; | |
877 | u32 packetLenAligned; | |
b219b3f7 | 878 | struct scatterlist bufferList[3]; |
59471438 | 879 | u64 alignedData=0; |
4d643114 | 880 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, MultiPageBuffer->Length); |
3e7ee490 HJ |
881 | |
882 | DPRINT_ENTER(VMBUS); | |
883 | ||
884 | DumpVmbusChannel(Channel); | |
885 | ||
886 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
887 | ||
888 | ASSERT(PfnCount > 0); | |
889 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
890 | ||
454f18a9 | 891 | /* Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is the largest size we support */ |
3fcc523a | 892 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount)*sizeof(u64)); |
3e7ee490 | 893 | packetLen = descSize + BufferLen; |
59471438 | 894 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 895 | |
59471438 | 896 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 897 | |
454f18a9 | 898 | /* Setup the descriptor */ |
3e7ee490 HJ |
899 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
900 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
901 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
902 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
903 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
904 | desc.RangeCount = 1; |
905 | ||
906 | desc.Range.Length = MultiPageBuffer->Length; | |
907 | desc.Range.Offset = MultiPageBuffer->Offset; | |
908 | ||
59471438 | 909 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, PfnCount*sizeof(u64)); |
3e7ee490 | 910 | |
b219b3f7 NP |
911 | sg_init_table(bufferList,3); |
912 | sg_set_buf(&bufferList[0], &desc, descSize); | |
913 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
914 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 HJ |
915 | |
916 | ret = RingBufferWrite( | |
917 | &Channel->Outbound, | |
918 | bufferList, | |
919 | 3); | |
920 | ||
454f18a9 | 921 | /* TODO: We should determine if this is optional */ |
3e7ee490 HJ |
922 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
923 | { | |
924 | VmbusChannelSetEvent(Channel); | |
925 | } | |
926 | ||
927 | DPRINT_EXIT(VMBUS); | |
928 | ||
929 | return ret; | |
930 | } | |
931 | ||
932 | ||
933 | /*++ | |
934 | ||
935 | Name: | |
936 | VmbusChannelRecvPacket() | |
937 | ||
938 | Description: | |
939 | Retrieve the user packet on the specified channel | |
940 | ||
941 | --*/ | |
454f18a9 | 942 | /* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */ |
aded7165 | 943 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, |
46a05253 GKH |
944 | void *Buffer, |
945 | u32 BufferLen, | |
946 | u32 *BufferActualLen, | |
947 | u64 *RequestId) | |
3e7ee490 HJ |
948 | { |
949 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
950 | u32 packetLen; |
951 | u32 userLen; | |
3e7ee490 | 952 | int ret; |
54411c42 | 953 | unsigned long flags; |
3e7ee490 HJ |
954 | |
955 | DPRINT_ENTER(VMBUS); | |
956 | ||
957 | *BufferActualLen = 0; | |
958 | *RequestId = 0; | |
959 | ||
54411c42 | 960 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
961 | |
962 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
963 | if (ret != 0) | |
964 | { | |
54411c42 | 965 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 966 | |
454f18a9 | 967 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
968 | DPRINT_EXIT(VMBUS); |
969 | return 0; | |
970 | } | |
971 | ||
454f18a9 | 972 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
973 | |
974 | packetLen = desc.Length8 << 3; | |
975 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 976 | /* ASSERT(userLen > 0); */ |
3e7ee490 HJ |
977 | |
978 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
979 | Channel, | |
980 | Channel->OfferMsg.ChildRelId, | |
981 | desc.Type, | |
982 | desc.Flags, | |
983 | desc.TransactionId, packetLen, userLen); | |
984 | ||
985 | *BufferActualLen = userLen; | |
986 | ||
987 | if (userLen > BufferLen) | |
988 | { | |
54411c42 | 989 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
990 | |
991 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", BufferLen, userLen); | |
992 | DPRINT_EXIT(VMBUS); | |
993 | ||
994 | return -1; | |
995 | } | |
996 | ||
997 | *RequestId = desc.TransactionId; | |
998 | ||
454f18a9 | 999 | /* Copy over the packet to the user buffer */ |
3e7ee490 HJ |
1000 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, (desc.DataOffset8 << 3)); |
1001 | ||
54411c42 | 1002 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1003 | |
1004 | DPRINT_EXIT(VMBUS); | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | /*++ | |
1010 | ||
1011 | Name: | |
1012 | VmbusChannelRecvPacketRaw() | |
1013 | ||
1014 | Description: | |
1015 | Retrieve the raw packet on the specified channel | |
1016 | ||
1017 | --*/ | |
aded7165 | 1018 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, |
8282c400 | 1019 | void * Buffer, |
4d643114 GKH |
1020 | u32 BufferLen, |
1021 | u32* BufferActualLen, | |
59471438 | 1022 | u64* RequestId |
3e7ee490 HJ |
1023 | ) |
1024 | { | |
1025 | VMPACKET_DESCRIPTOR desc; | |
4d643114 GKH |
1026 | u32 packetLen; |
1027 | u32 userLen; | |
3e7ee490 | 1028 | int ret; |
54411c42 | 1029 | unsigned long flags; |
3e7ee490 HJ |
1030 | |
1031 | DPRINT_ENTER(VMBUS); | |
1032 | ||
1033 | *BufferActualLen = 0; | |
1034 | *RequestId = 0; | |
1035 | ||
54411c42 | 1036 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1037 | |
1038 | ret = RingBufferPeek(&Channel->Inbound, &desc, sizeof(VMPACKET_DESCRIPTOR)); | |
1039 | if (ret != 0) | |
1040 | { | |
54411c42 | 1041 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1042 | |
454f18a9 | 1043 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
1044 | DPRINT_EXIT(VMBUS); |
1045 | return 0; | |
1046 | } | |
1047 | ||
454f18a9 | 1048 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
1049 | |
1050 | packetLen = desc.Length8 << 3; | |
1051 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1052 | ||
1053 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d flag %d tid %llx pktlen %d datalen %d> ", | |
1054 | Channel, | |
1055 | Channel->OfferMsg.ChildRelId, | |
1056 | desc.Type, | |
1057 | desc.Flags, | |
1058 | desc.TransactionId, packetLen, userLen); | |
1059 | ||
1060 | *BufferActualLen = packetLen; | |
1061 | ||
1062 | if (packetLen > BufferLen) | |
1063 | { | |
54411c42 | 1064 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1065 | |
1066 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but got space for only %d bytes", packetLen, BufferLen); | |
1067 | DPRINT_EXIT(VMBUS); | |
1068 | return -2; | |
1069 | } | |
1070 | ||
1071 | *RequestId = desc.TransactionId; | |
1072 | ||
454f18a9 | 1073 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
1074 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
1075 | ||
54411c42 | 1076 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1077 | |
1078 | DPRINT_EXIT(VMBUS); | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | ||
1084 | /*++ | |
1085 | ||
1086 | Name: | |
1087 | VmbusChannelOnChannelEvent() | |
1088 | ||
1089 | Description: | |
1090 | Channel event callback | |
1091 | ||
1092 | --*/ | |
aded7165 | 1093 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1094 | { |
1095 | DumpVmbusChannel(Channel); | |
1096 | ASSERT(Channel->OnChannelCallback); | |
1097 | #ifdef ENABLE_POLLING | |
c8a429a4 | 1098 | del_timer(&Channel->poll_timer); |
3e7ee490 | 1099 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
c8a429a4 GKH |
1100 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1101 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1102 | #else |
1103 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
1104 | #endif | |
1105 | } | |
1106 | ||
1107 | /*++ | |
1108 | ||
1109 | Name: | |
1110 | VmbusChannelOnTimer() | |
1111 | ||
1112 | Description: | |
1113 | Timer event callback | |
1114 | ||
1115 | --*/ | |
46a05253 | 1116 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1117 | { |
aded7165 | 1118 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 HJ |
1119 | |
1120 | if (channel->OnChannelCallback) | |
1121 | { | |
1122 | channel->OnChannelCallback(channel->ChannelCallbackContext); | |
1123 | #ifdef ENABLE_POLLING | |
c8a429a4 GKH |
1124 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1125 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1126 | #endif |
1127 | } | |
1128 | } | |
1129 | ||
1130 | ||
1131 | /*++ | |
1132 | ||
1133 | Name: | |
1134 | DumpVmbusChannel() | |
1135 | ||
1136 | Description: | |
1137 | Dump vmbus channel info to the console | |
1138 | ||
1139 | --*/ | |
aded7165 | 1140 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1141 | { |
1142 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1143 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1144 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1145 | } | |
1146 | ||
1147 | ||
454f18a9 | 1148 | /* eof */ |