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Commit | Line | Data |
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3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
a0086dc5 | 22 | #include <linux/mm.h> |
4983b39a | 23 | #include "osd.h" |
645954c5 | 24 | #include "logging.h" |
3e7ee490 HJ |
25 | #include "VmbusPrivate.h" |
26 | ||
454f18a9 | 27 | /* Internal routines */ |
aded7165 | 28 | static int VmbusChannelCreateGpadlHeader( |
f4266e34 GKH |
29 | void *Kbuffer, /* must be phys and virt contiguous */ |
30 | u32 Size, /* page-size multiple */ | |
aded7165 | 31 | struct vmbus_channel_msginfo **msgInfo, |
f4266e34 | 32 | u32 *MessageCount); |
aded7165 GKH |
33 | static void DumpVmbusChannel(struct vmbus_channel *channel); |
34 | static void VmbusChannelSetEvent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
35 | |
36 | ||
37 | #if 0 | |
f4266e34 | 38 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
3e7ee490 | 39 | { |
f4266e34 GKH |
40 | int i = 0; |
41 | int j = 0; | |
3e7ee490 | 42 | |
f4266e34 GKH |
43 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
44 | MonitorPage, MonitorPage->TriggerState); | |
3e7ee490 | 45 | |
f4266e34 GKH |
46 | for (i = 0; i < 4; i++) |
47 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, | |
48 | MonitorPage->TriggerGroup[i].AsUINT64); | |
3e7ee490 | 49 | |
f4266e34 GKH |
50 | for (i = 0; i < 4; i++) { |
51 | for (j = 0; j < 32; j++) { | |
52 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, | |
53 | MonitorPage->Latency[i][j]); | |
3e7ee490 HJ |
54 | } |
55 | } | |
f4266e34 GKH |
56 | for (i = 0; i < 4; i++) { |
57 | for (j = 0; j < 32; j++) { | |
58 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, | |
59 | MonitorPage->Parameter[i][j].ConnectionId.Asu32); | |
60 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, | |
61 | MonitorPage->Parameter[i][j].FlagNumber); | |
3e7ee490 HJ |
62 | } |
63 | } | |
64 | } | |
65 | #endif | |
66 | ||
f4266e34 GKH |
67 | /** |
68 | * VmbusChannelSetEvent - Trigger an event notification on the specified channel. | |
69 | */ | |
aded7165 | 70 | static void VmbusChannelSetEvent(struct vmbus_channel *Channel) |
3e7ee490 | 71 | { |
eacb1b4d | 72 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
73 | |
74 | DPRINT_ENTER(VMBUS); | |
75 | ||
f4266e34 | 76 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 77 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
78 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
79 | (unsigned long *) gVmbusConnection.SendInterruptPage + | |
f4266e34 | 80 | (Channel->OfferMsg.ChildRelId >> 5)); |
3e7ee490 | 81 | |
f4266e34 | 82 | monitorPage = gVmbusConnection.MonitorPages; |
454f18a9 | 83 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 84 | |
7c369f40 | 85 | set_bit(Channel->MonitorBit, |
f4266e34 GKH |
86 | (unsigned long *)&monitorPage->TriggerGroup |
87 | [Channel->MonitorGroup].Pending); | |
7c369f40 | 88 | |
f4266e34 | 89 | } else { |
3e7ee490 HJ |
90 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); |
91 | } | |
92 | ||
93 | DPRINT_EXIT(VMBUS); | |
94 | } | |
95 | ||
96 | #if 0 | |
aded7165 | 97 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 98 | { |
eacb1b4d | 99 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
100 | |
101 | DPRINT_ENTER(VMBUS); | |
102 | ||
f4266e34 | 103 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 104 | /* Each u32 represents 32 channels */ |
7c369f40 | 105 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
f4266e34 GKH |
106 | (unsigned long *)gVmbusConnection.SendInterruptPage + |
107 | (Channel->OfferMsg.ChildRelId >> 5)); | |
3e7ee490 | 108 | |
f4266e34 GKH |
109 | monitorPage = |
110 | (struct hv_monitor_page *)gVmbusConnection.MonitorPages; | |
454f18a9 | 111 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 112 | |
7c369f40 | 113 | clear_bit(Channel->MonitorBit, |
f4266e34 GKH |
114 | (unsigned long *)&monitorPage->TriggerGroup |
115 | [Channel->MonitorGroup].Pending); | |
3e7ee490 HJ |
116 | } |
117 | ||
118 | DPRINT_EXIT(VMBUS); | |
119 | } | |
120 | ||
121 | #endif | |
f4266e34 GKH |
122 | /** |
123 | * VmbusChannelGetDebugInfo -Retrieve various channel debug info | |
124 | */ | |
aded7165 GKH |
125 | void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel, |
126 | struct vmbus_channel_debug_info *DebugInfo) | |
3e7ee490 | 127 | { |
eacb1b4d | 128 | struct hv_monitor_page *monitorPage; |
f4266e34 GKH |
129 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
130 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 131 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 HJ |
132 | |
133 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
134 | DebugInfo->State = Channel->State; | |
f4266e34 GKH |
135 | memcpy(&DebugInfo->InterfaceType, |
136 | &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); | |
137 | memcpy(&DebugInfo->InterfaceInstance, | |
138 | &Channel->OfferMsg.Offer.InterfaceInstance, | |
139 | sizeof(struct hv_guid)); | |
3e7ee490 | 140 | |
eacb1b4d | 141 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 HJ |
142 | |
143 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
144 | ||
f4266e34 GKH |
145 | DebugInfo->ServerMonitorPending = |
146 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
147 | DebugInfo->ServerMonitorLatency = | |
148 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
149 | DebugInfo->ServerMonitorConnectionId = | |
150 | monitorPage->Parameter[monitorGroup] | |
151 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
152 | |
153 | monitorPage++; | |
154 | ||
f4266e34 GKH |
155 | DebugInfo->ClientMonitorPending = |
156 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
157 | DebugInfo->ClientMonitorLatency = | |
158 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
159 | DebugInfo->ClientMonitorConnectionId = | |
160 | monitorPage->Parameter[monitorGroup] | |
161 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
162 | |
163 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
164 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
165 | } | |
166 | ||
f4266e34 GKH |
167 | /** |
168 | * VmbusChannelOpen - Open the specified channel. | |
169 | */ | |
170 | int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize, | |
171 | u32 RecvRingBufferSize, void *UserData, u32 UserDataLen, | |
172 | PFN_CHANNEL_CALLBACK pfnOnChannelCallback, void *Context) | |
3e7ee490 | 173 | { |
82250213 | 174 | struct vmbus_channel_open_channel *openMsg; |
aded7165 | 175 | struct vmbus_channel_msginfo *openInfo; |
3e7ee490 | 176 | void *in, *out; |
dd0813b6 | 177 | unsigned long flags; |
f4266e34 | 178 | int ret; |
3e7ee490 HJ |
179 | |
180 | DPRINT_ENTER(VMBUS); | |
181 | ||
454f18a9 | 182 | /* Aligned to page size */ |
f4266e34 GKH |
183 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); |
184 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); | |
3e7ee490 HJ |
185 | |
186 | NewChannel->OnChannelCallback = pfnOnChannelCallback; | |
187 | NewChannel->ChannelCallbackContext = Context; | |
188 | ||
454f18a9 | 189 | /* Allocate the ring buffer */ |
f4266e34 GKH |
190 | out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize) |
191 | >> PAGE_SHIFT); | |
3e7ee490 | 192 | ASSERT(out); |
c4b0bc94 | 193 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 194 | |
f4266e34 | 195 | in = (void *)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
196 | |
197 | NewChannel->RingBufferPages = out; | |
f4266e34 GKH |
198 | NewChannel->RingBufferPageCount = (SendRingBufferSize + |
199 | RecvRingBufferSize) >> PAGE_SHIFT; | |
3e7ee490 HJ |
200 | |
201 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
202 | ||
203 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
204 | ||
454f18a9 | 205 | /* Establish the gpadl for the ring buffer */ |
f4266e34 GKH |
206 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
207 | NewChannel); | |
3e7ee490 HJ |
208 | |
209 | NewChannel->RingBufferGpadlHandle = 0; | |
210 | ||
211 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
f4266e34 GKH |
212 | NewChannel->Outbound.RingBuffer, |
213 | SendRingBufferSize + | |
214 | RecvRingBufferSize, | |
215 | &NewChannel->RingBufferGpadlHandle); | |
216 | ||
217 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
218 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
219 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
220 | NewChannel->RingBufferGpadlHandle, | |
221 | NewChannel->Outbound.RingBuffer, | |
222 | NewChannel->Outbound.RingSize, | |
223 | NewChannel->Inbound.RingBuffer, | |
224 | NewChannel->Inbound.RingSize, | |
225 | SendRingBufferSize); | |
3e7ee490 | 226 | |
454f18a9 | 227 | /* Create and init the channel open message */ |
f4266e34 GKH |
228 | openInfo = kmalloc(sizeof(*openInfo) + |
229 | sizeof(struct vmbus_channel_open_channel), | |
230 | GFP_KERNEL); | |
3e7ee490 HJ |
231 | ASSERT(openInfo != NULL); |
232 | ||
bfc30aae | 233 | openInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 234 | |
82250213 | 235 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
236 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
237 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
238 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
239 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
240 | ASSERT(openMsg->RingBufferGpadlHandle); | |
241 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> | |
242 | PAGE_SHIFT; | |
243 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 HJ |
244 | |
245 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
246 | if (UserDataLen) | |
3e7ee490 | 247 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 248 | |
dd0813b6 | 249 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
250 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, |
251 | &openInfo->MsgListEntry); | |
dd0813b6 | 252 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
253 | |
254 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
255 | ||
f4266e34 GKH |
256 | ret = VmbusPostMessage(openMsg, |
257 | sizeof(struct vmbus_channel_open_channel)); | |
258 | if (ret != 0) { | |
3e7ee490 HJ |
259 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
260 | goto Cleanup; | |
261 | } | |
262 | ||
454f18a9 | 263 | /* FIXME: Need to time-out here */ |
bfc30aae | 264 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
265 | |
266 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 267 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 268 | else |
f4266e34 GKH |
269 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
270 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
271 | |
272 | Cleanup: | |
dd0813b6 | 273 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 274 | REMOVE_ENTRY_LIST(&openInfo->MsgListEntry); |
dd0813b6 | 275 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 276 | |
420beac4 | 277 | kfree(openInfo->WaitEvent); |
8c69f52a | 278 | kfree(openInfo); |
3e7ee490 HJ |
279 | |
280 | DPRINT_EXIT(VMBUS); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
f4266e34 GKH |
285 | /** |
286 | * DumpGpadlBody - Dump the gpadl body message to the console for debugging purposes. | |
287 | */ | |
82250213 | 288 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 | 289 | { |
f4266e34 GKH |
290 | int i; |
291 | int pfnCount; | |
3e7ee490 | 292 | |
f4266e34 GKH |
293 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) / |
294 | sizeof(u64); | |
3e7ee490 HJ |
295 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
296 | ||
f4266e34 GKH |
297 | for (i = 0; i < pfnCount; i++) |
298 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", | |
299 | i, Gpadl->Pfn[i]); | |
3e7ee490 HJ |
300 | } |
301 | ||
f4266e34 GKH |
302 | /** |
303 | * DumpGpadlHeader - Dump the gpadl header message to the console for debugging purposes. | |
304 | */ | |
82250213 | 305 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 | 306 | { |
f4266e34 GKH |
307 | int i, j; |
308 | int pageCount; | |
3e7ee490 | 309 | |
f4266e34 GKH |
310 | DPRINT_DBG(VMBUS, |
311 | "gpadl header - relid %d, range count %d, range buflen %d", | |
312 | Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen); | |
313 | for (i = 0; i < Gpadl->RangeCount; i++) { | |
3e7ee490 | 314 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
f4266e34 | 315 | pageCount = (pageCount > 26) ? 26 : pageCount; |
3e7ee490 | 316 | |
f4266e34 GKH |
317 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
318 | "page count %d", i, Gpadl->Range[i].ByteCount, | |
319 | Gpadl->Range[i].ByteOffset, pageCount); | |
3e7ee490 | 320 | |
f4266e34 GKH |
321 | for (j = 0; j < pageCount; j++) |
322 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, | |
323 | Gpadl->Range[i].PfnArray[j]); | |
3e7ee490 HJ |
324 | } |
325 | } | |
326 | ||
f4266e34 GKH |
327 | /** |
328 | * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer | |
329 | */ | |
330 | static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size, | |
331 | struct vmbus_channel_msginfo **MsgInfo, | |
332 | u32 *MessageCount) | |
3e7ee490 HJ |
333 | { |
334 | int i; | |
335 | int pageCount; | |
f4266e34 | 336 | unsigned long long pfn; |
82250213 GKH |
337 | struct vmbus_channel_gpadl_header *gpaHeader; |
338 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 GKH |
339 | struct vmbus_channel_msginfo *msgHeader; |
340 | struct vmbus_channel_msginfo *msgBody; | |
f4266e34 | 341 | u32 msgSize; |
3e7ee490 HJ |
342 | |
343 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
344 | ||
f4266e34 GKH |
345 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
346 | ASSERT((Size & (PAGE_SIZE-1)) == 0); | |
3e7ee490 HJ |
347 | |
348 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 349 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 350 | |
454f18a9 | 351 | /* do we need a gpadl body msg */ |
f4266e34 GKH |
352 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
353 | sizeof(struct vmbus_channel_gpadl_header) - | |
354 | sizeof(struct gpa_range); | |
59471438 | 355 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 356 | |
f4266e34 GKH |
357 | if (pageCount > pfnCount) { |
358 | /* we need a gpadl body */ | |
454f18a9 | 359 | /* fill in the header */ |
f4266e34 GKH |
360 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
361 | sizeof(struct vmbus_channel_gpadl_header) + | |
362 | sizeof(struct gpa_range) + pfnCount * sizeof(u64); | |
e276a3a5 | 363 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
364 | |
365 | INITIALIZE_LIST_HEAD(&msgHeader->SubMsgList); | |
f4266e34 | 366 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 367 | |
82250213 | 368 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 369 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
370 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
371 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
372 | gpaHeader->Range[0].ByteOffset = 0; |
373 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 374 | for (i = 0; i < pfnCount; i++) |
3e7ee490 | 375 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
376 | *MsgInfo = msgHeader; |
377 | *MessageCount = 1; | |
378 | ||
379 | pfnSum = pfnCount; | |
380 | pfnLeft = pageCount - pfnCount; | |
381 | ||
454f18a9 | 382 | /* how many pfns can we fit */ |
f4266e34 GKH |
383 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
384 | sizeof(struct vmbus_channel_gpadl_body); | |
59471438 | 385 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 386 | |
454f18a9 | 387 | /* fill in the body */ |
f4266e34 | 388 | while (pfnLeft) { |
3e7ee490 | 389 | if (pfnLeft > pfnCount) |
3e7ee490 | 390 | pfnCurr = pfnCount; |
3e7ee490 | 391 | else |
3e7ee490 | 392 | pfnCurr = pfnLeft; |
3e7ee490 | 393 | |
f4266e34 GKH |
394 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
395 | sizeof(struct vmbus_channel_gpadl_body) + | |
396 | pfnCurr * sizeof(u64); | |
e276a3a5 | 397 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
398 | ASSERT(msgBody); |
399 | msgBody->MessageSize = msgSize; | |
400 | (*MessageCount)++; | |
f4266e34 GKH |
401 | gpadlBody = |
402 | (struct vmbus_channel_gpadl_body *)msgBody->Msg; | |
403 | ||
404 | /* | |
405 | * FIXME: | |
406 | * Gpadl is u32 and we are using a pointer which could | |
407 | * be 64-bit | |
408 | */ | |
454f18a9 | 409 | /* gpadlBody->Gpadl = kbuffer; */ |
f4266e34 | 410 | for (i = 0; i < pfnCurr; i++) |
3e7ee490 | 411 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
3e7ee490 | 412 | |
454f18a9 | 413 | /* add to msg header */ |
f4266e34 GKH |
414 | INSERT_TAIL_LIST(&msgHeader->SubMsgList, |
415 | &msgBody->MsgListEntry); | |
3e7ee490 HJ |
416 | pfnSum += pfnCurr; |
417 | pfnLeft -= pfnCurr; | |
418 | } | |
f4266e34 | 419 | } else { |
454f18a9 | 420 | /* everything fits in a header */ |
f4266e34 GKH |
421 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
422 | sizeof(struct vmbus_channel_gpadl_header) + | |
423 | sizeof(struct gpa_range) + pageCount * sizeof(u64); | |
e276a3a5 | 424 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
f4266e34 | 425 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 426 | |
82250213 | 427 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 428 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
429 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
430 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
431 | gpaHeader->Range[0].ByteOffset = 0; |
432 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 433 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 434 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
435 | |
436 | *MsgInfo = msgHeader; | |
437 | *MessageCount = 1; | |
438 | } | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
f4266e34 GKH |
443 | /** |
444 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer | |
445 | * | |
446 | * @Channel: a channel | |
447 | * @Kbuffer: from kmalloc | |
448 | * @Size: page-size multiple | |
449 | * @GpadlHandle: some funky thing | |
450 | */ | |
451 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
452 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 453 | { |
82250213 GKH |
454 | struct vmbus_channel_gpadl_header *gpadlMsg; |
455 | struct vmbus_channel_gpadl_body *gpadlBody; | |
456 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
aded7165 GKH |
457 | struct vmbus_channel_msginfo *msgInfo; |
458 | struct vmbus_channel_msginfo *subMsgInfo; | |
4d643114 | 459 | u32 msgCount; |
f4266e34 GKH |
460 | LIST_ENTRY *anchor; |
461 | LIST_ENTRY *curr; | |
4d643114 | 462 | u32 nextGpadlHandle; |
dd0813b6 | 463 | unsigned long flags; |
f4266e34 | 464 | int ret; |
3e7ee490 HJ |
465 | |
466 | DPRINT_ENTER(VMBUS); | |
467 | ||
f4888417 BP |
468 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
469 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
470 | |
471 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
472 | ASSERT(msgInfo != NULL); | |
f4266e34 | 473 | ASSERT(msgCount > 0); |
3e7ee490 | 474 | |
bfc30aae | 475 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 476 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
477 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
478 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
479 | gpadlMsg->Gpadl = nextGpadlHandle; | |
480 | ||
481 | DumpGpadlHeader(gpadlMsg); | |
482 | ||
dd0813b6 | 483 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
484 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, |
485 | &msgInfo->MsgListEntry); | |
dd0813b6 | 486 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 487 | |
f4266e34 GKH |
488 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
489 | Kbuffer, Size, msgCount); | |
3e7ee490 | 490 | |
f4266e34 GKH |
491 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
492 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 493 | |
f4266e34 GKH |
494 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
495 | sizeof(*msgInfo)); | |
496 | if (ret != 0) { | |
3e7ee490 HJ |
497 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
498 | goto Cleanup; | |
499 | } | |
500 | ||
f4266e34 GKH |
501 | if (msgCount > 1) { |
502 | ITERATE_LIST_ENTRIES(anchor, curr, &msgInfo->SubMsgList) { | |
82250213 | 503 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
504 | gpadlBody = |
505 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
506 | |
507 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
508 | gpadlBody->Gpadl = nextGpadlHandle; | |
509 | ||
f4266e34 GKH |
510 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
511 | subMsgInfo->MessageSize - | |
512 | sizeof(*subMsgInfo)); | |
3e7ee490 | 513 | |
f4266e34 GKH |
514 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
515 | sizeof(*subMsgInfo)); | |
516 | ret = VmbusPostMessage(gpadlBody, | |
517 | subMsgInfo->MessageSize - | |
518 | sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
519 | ASSERT(ret == 0); |
520 | } | |
521 | } | |
bfc30aae | 522 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 523 | |
454f18a9 | 524 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
525 | DPRINT_DBG(VMBUS, "Received GPADL created " |
526 | "(relid %d, status %d handle %x)", | |
527 | Channel->OfferMsg.ChildRelId, | |
528 | msgInfo->Response.GpadlCreated.CreationStatus, | |
529 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
530 | |
531 | *GpadlHandle = gpadlMsg->Gpadl; | |
532 | ||
533 | Cleanup: | |
dd0813b6 | 534 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 535 | REMOVE_ENTRY_LIST(&msgInfo->MsgListEntry); |
dd0813b6 | 536 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 537 | |
420beac4 | 538 | kfree(msgInfo->WaitEvent); |
8c69f52a | 539 | kfree(msgInfo); |
3e7ee490 HJ |
540 | |
541 | DPRINT_EXIT(VMBUS); | |
542 | ||
543 | return ret; | |
544 | } | |
545 | ||
f4266e34 GKH |
546 | /** |
547 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle | |
548 | */ | |
aded7165 | 549 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 550 | { |
82250213 | 551 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 552 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 553 | unsigned long flags; |
f4266e34 | 554 | int ret; |
3e7ee490 HJ |
555 | |
556 | DPRINT_ENTER(VMBUS); | |
557 | ||
558 | ASSERT(GpadlHandle != 0); | |
559 | ||
f4266e34 GKH |
560 | info = kmalloc(sizeof(*info) + |
561 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
3e7ee490 HJ |
562 | ASSERT(info != NULL); |
563 | ||
bfc30aae | 564 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 565 | |
82250213 | 566 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
567 | |
568 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
569 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
570 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 571 | |
dd0813b6 | 572 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 573 | INSERT_TAIL_LIST(&gVmbusConnection.ChannelMsgList, &info->MsgListEntry); |
dd0813b6 | 574 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 575 | |
f4266e34 GKH |
576 | ret = VmbusPostMessage(msg, |
577 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
578 | if (ret != 0) { | |
454f18a9 | 579 | /* TODO: */ |
f4266e34 | 580 | /* something... */ |
3e7ee490 HJ |
581 | } |
582 | ||
bfc30aae | 583 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 584 | |
454f18a9 | 585 | /* Received a torndown response */ |
dd0813b6 | 586 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 587 | REMOVE_ENTRY_LIST(&info->MsgListEntry); |
dd0813b6 | 588 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 589 | |
420beac4 | 590 | kfree(info->WaitEvent); |
8c69f52a | 591 | kfree(info); |
3e7ee490 HJ |
592 | |
593 | DPRINT_EXIT(VMBUS); | |
594 | ||
595 | return ret; | |
596 | } | |
597 | ||
f4266e34 GKH |
598 | /** |
599 | * VmbusChannelClose - Close the specified channel | |
600 | */ | |
aded7165 | 601 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 602 | { |
82250213 | 603 | struct vmbus_channel_close_channel *msg; |
aded7165 | 604 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 605 | unsigned long flags; |
f4266e34 | 606 | int ret; |
3e7ee490 HJ |
607 | |
608 | DPRINT_ENTER(VMBUS); | |
609 | ||
454f18a9 | 610 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 611 | Channel->OnChannelCallback = NULL; |
c8a429a4 | 612 | del_timer(&Channel->poll_timer); |
3e7ee490 | 613 | |
454f18a9 | 614 | /* Send a closing message */ |
f4266e34 GKH |
615 | info = kmalloc(sizeof(*info) + |
616 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
3e7ee490 HJ |
617 | ASSERT(info != NULL); |
618 | ||
bfc30aae | 619 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 620 | |
82250213 | 621 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
622 | msg->Header.MessageType = ChannelMessageCloseChannel; |
623 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 624 | |
82250213 | 625 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 626 | if (ret != 0) { |
454f18a9 | 627 | /* TODO: */ |
f4266e34 | 628 | /* something... */ |
3e7ee490 HJ |
629 | } |
630 | ||
454f18a9 | 631 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 632 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
633 | VmbusChannelTeardownGpadl(Channel, |
634 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 635 | |
454f18a9 | 636 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 637 | |
454f18a9 | 638 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
639 | RingBufferCleanup(&Channel->Outbound); |
640 | RingBufferCleanup(&Channel->Inbound); | |
641 | ||
bfc30aae | 642 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 643 | |
8c69f52a | 644 | kfree(info); |
3e7ee490 | 645 | |
454f18a9 BP |
646 | /* |
647 | * If we are closing the channel during an error path in | |
648 | * opening the channel, don't free the channel since the | |
649 | * caller will free the channel | |
650 | */ | |
651 | ||
f4266e34 | 652 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 653 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 654 | REMOVE_ENTRY_LIST(&Channel->ListEntry); |
0f5e44ca | 655 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
656 | |
657 | FreeVmbusChannel(Channel); | |
658 | } | |
659 | ||
660 | DPRINT_EXIT(VMBUS); | |
661 | } | |
662 | ||
f4266e34 GKH |
663 | /** |
664 | * VmbusChannelSendPacket - Send the specified buffer on the given channel | |
665 | */ | |
666 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
667 | u32 BufferLen, u64 RequestId, | |
668 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 669 | { |
8dc0a06a GKH |
670 | struct vmpacket_descriptor desc; |
671 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 672 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 673 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
674 | u64 alignedData = 0; |
675 | int ret; | |
3e7ee490 HJ |
676 | |
677 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
678 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
679 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
680 | |
681 | DumpVmbusChannel(Channel); | |
682 | ||
59471438 | 683 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 684 | |
454f18a9 BP |
685 | /* Setup the descriptor */ |
686 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
687 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
688 | /* in 8-bytes granularity */ |
689 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
690 | desc.Length8 = (u16)(packetLenAligned >> 3); |
691 | desc.TransactionId = RequestId; | |
3e7ee490 | 692 | |
f4266e34 | 693 | sg_init_table(bufferList, 3); |
8dc0a06a | 694 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
695 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
696 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 697 | |
f4266e34 | 698 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 699 | |
454f18a9 | 700 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 701 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 702 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
703 | |
704 | DPRINT_EXIT(VMBUS); | |
705 | ||
706 | return ret; | |
707 | } | |
708 | ||
f4266e34 GKH |
709 | /** |
710 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer packets using a GPADL Direct packet type. | |
711 | */ | |
aded7165 | 712 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
713 | struct hv_page_buffer PageBuffers[], |
714 | u32 PageCount, void *Buffer, u32 BufferLen, | |
715 | u64 RequestId) | |
3e7ee490 | 716 | { |
f4266e34 GKH |
717 | int ret; |
718 | int i; | |
0cf4fa80 | 719 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
720 | u32 descSize; |
721 | u32 packetLen; | |
722 | u32 packetLenAligned; | |
b219b3f7 | 723 | struct scatterlist bufferList[3]; |
f4266e34 | 724 | u64 alignedData = 0; |
3e7ee490 HJ |
725 | |
726 | DPRINT_ENTER(VMBUS); | |
727 | ||
728 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
729 | ||
730 | DumpVmbusChannel(Channel); | |
731 | ||
f4266e34 GKH |
732 | /* |
733 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
734 | * largest size we support | |
735 | */ | |
736 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
737 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
738 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 739 | packetLen = descSize + BufferLen; |
59471438 | 740 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 741 | |
59471438 | 742 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 743 | |
454f18a9 | 744 | /* Setup the descriptor */ |
3e7ee490 HJ |
745 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
746 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
747 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
748 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
749 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
750 | desc.RangeCount = PageCount; |
751 | ||
f4266e34 | 752 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
753 | desc.Range[i].Length = PageBuffers[i].Length; |
754 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
755 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
756 | } | |
757 | ||
f4266e34 | 758 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
759 | sg_set_buf(&bufferList[0], &desc, descSize); |
760 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
761 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 762 | |
f4266e34 | 763 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 764 | |
454f18a9 | 765 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 766 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 767 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
768 | |
769 | DPRINT_EXIT(VMBUS); | |
770 | ||
771 | return ret; | |
772 | } | |
773 | ||
f4266e34 GKH |
774 | /** |
775 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet using a GPADL Direct packet type. | |
776 | */ | |
aded7165 | 777 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
778 | struct hv_multipage_buffer *MultiPageBuffer, |
779 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 780 | { |
f4266e34 | 781 | int ret; |
3fcc523a | 782 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
783 | u32 descSize; |
784 | u32 packetLen; | |
785 | u32 packetLenAligned; | |
b219b3f7 | 786 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
787 | u64 alignedData = 0; |
788 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
789 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
790 | |
791 | DPRINT_ENTER(VMBUS); | |
792 | ||
793 | DumpVmbusChannel(Channel); | |
794 | ||
f4266e34 GKH |
795 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
796 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 HJ |
797 | |
798 | ASSERT(PfnCount > 0); | |
799 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
800 | ||
f4266e34 GKH |
801 | /* |
802 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
803 | * the largest size we support | |
804 | */ | |
805 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
806 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
807 | sizeof(u64)); | |
3e7ee490 | 808 | packetLen = descSize + BufferLen; |
59471438 | 809 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 810 | |
59471438 | 811 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 812 | |
454f18a9 | 813 | /* Setup the descriptor */ |
3e7ee490 HJ |
814 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
815 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
816 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
817 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
818 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
819 | desc.RangeCount = 1; |
820 | ||
821 | desc.Range.Length = MultiPageBuffer->Length; | |
822 | desc.Range.Offset = MultiPageBuffer->Offset; | |
823 | ||
f4266e34 GKH |
824 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
825 | PfnCount * sizeof(u64)); | |
3e7ee490 | 826 | |
f4266e34 | 827 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
828 | sg_set_buf(&bufferList[0], &desc, descSize); |
829 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
830 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 831 | |
f4266e34 | 832 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 833 | |
454f18a9 | 834 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 835 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 836 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
837 | |
838 | DPRINT_EXIT(VMBUS); | |
839 | ||
840 | return ret; | |
841 | } | |
842 | ||
f4266e34 GKH |
843 | /** |
844 | * VmbusChannelRecvPacket - Retrieve the user packet on the specified channel | |
845 | */ | |
454f18a9 | 846 | /* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */ |
f4266e34 GKH |
847 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
848 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 849 | { |
8dc0a06a | 850 | struct vmpacket_descriptor desc; |
4d643114 GKH |
851 | u32 packetLen; |
852 | u32 userLen; | |
3e7ee490 | 853 | int ret; |
54411c42 | 854 | unsigned long flags; |
3e7ee490 HJ |
855 | |
856 | DPRINT_ENTER(VMBUS); | |
857 | ||
858 | *BufferActualLen = 0; | |
859 | *RequestId = 0; | |
860 | ||
54411c42 | 861 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 862 | |
f4266e34 GKH |
863 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
864 | sizeof(struct vmpacket_descriptor)); | |
865 | if (ret != 0) { | |
54411c42 | 866 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 867 | |
454f18a9 | 868 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
869 | DPRINT_EXIT(VMBUS); |
870 | return 0; | |
871 | } | |
872 | ||
454f18a9 | 873 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
874 | |
875 | packetLen = desc.Length8 << 3; | |
876 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 877 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 878 | |
f4266e34 GKH |
879 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
880 | "flag %d tid %llx pktlen %d datalen %d> ", | |
881 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
882 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
883 | |
884 | *BufferActualLen = userLen; | |
885 | ||
f4266e34 | 886 | if (userLen > BufferLen) { |
54411c42 | 887 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 888 | |
f4266e34 GKH |
889 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
890 | BufferLen, userLen); | |
3e7ee490 HJ |
891 | DPRINT_EXIT(VMBUS); |
892 | ||
893 | return -1; | |
894 | } | |
895 | ||
896 | *RequestId = desc.TransactionId; | |
897 | ||
454f18a9 | 898 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
899 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
900 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 901 | |
54411c42 | 902 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
903 | |
904 | DPRINT_EXIT(VMBUS); | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
f4266e34 GKH |
909 | /** |
910 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel | |
911 | */ | |
912 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
913 | u32 BufferLen, u32 *BufferActualLen, | |
914 | u64 *RequestId) | |
3e7ee490 | 915 | { |
8dc0a06a | 916 | struct vmpacket_descriptor desc; |
4d643114 GKH |
917 | u32 packetLen; |
918 | u32 userLen; | |
3e7ee490 | 919 | int ret; |
54411c42 | 920 | unsigned long flags; |
3e7ee490 HJ |
921 | |
922 | DPRINT_ENTER(VMBUS); | |
923 | ||
924 | *BufferActualLen = 0; | |
925 | *RequestId = 0; | |
926 | ||
54411c42 | 927 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 928 | |
f4266e34 GKH |
929 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
930 | sizeof(struct vmpacket_descriptor)); | |
931 | if (ret != 0) { | |
54411c42 | 932 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 933 | |
454f18a9 | 934 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
935 | DPRINT_EXIT(VMBUS); |
936 | return 0; | |
937 | } | |
938 | ||
454f18a9 | 939 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
940 | |
941 | packetLen = desc.Length8 << 3; | |
942 | userLen = packetLen - (desc.DataOffset8 << 3); | |
943 | ||
f4266e34 GKH |
944 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
945 | "flag %d tid %llx pktlen %d datalen %d> ", | |
946 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
947 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
948 | |
949 | *BufferActualLen = packetLen; | |
950 | ||
f4266e34 | 951 | if (packetLen > BufferLen) { |
54411c42 | 952 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 953 | |
f4266e34 GKH |
954 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
955 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
956 | DPRINT_EXIT(VMBUS); |
957 | return -2; | |
958 | } | |
959 | ||
960 | *RequestId = desc.TransactionId; | |
961 | ||
454f18a9 | 962 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
963 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
964 | ||
54411c42 | 965 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
966 | |
967 | DPRINT_EXIT(VMBUS); | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
f4266e34 GKH |
972 | /** |
973 | * VmbusChannelOnChannelEvent - Channel event callback | |
974 | */ | |
aded7165 | 975 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
976 | { |
977 | DumpVmbusChannel(Channel); | |
978 | ASSERT(Channel->OnChannelCallback); | |
979 | #ifdef ENABLE_POLLING | |
c8a429a4 | 980 | del_timer(&Channel->poll_timer); |
3e7ee490 | 981 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
c8a429a4 GKH |
982 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
983 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
984 | #else |
985 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
986 | #endif | |
987 | } | |
988 | ||
f4266e34 GKH |
989 | /** |
990 | * VmbusChannelOnTimer - Timer event callback | |
991 | */ | |
46a05253 | 992 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 993 | { |
aded7165 | 994 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 995 | |
f4266e34 | 996 | if (channel->OnChannelCallback) { |
3e7ee490 HJ |
997 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
998 | #ifdef ENABLE_POLLING | |
c8a429a4 GKH |
999 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1000 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1001 | #endif |
1002 | } | |
1003 | } | |
1004 | ||
f4266e34 GKH |
1005 | /** |
1006 | * DumpVmbusChannel - Dump vmbus channel info to the console | |
1007 | */ | |
aded7165 | 1008 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1009 | { |
1010 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1011 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1012 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1013 | } |