Commit | Line | Data |
---|---|---|
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> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
c88c4e4c | 24 | #include <linux/module.h> |
4983b39a | 25 | #include "osd.h" |
645954c5 | 26 | #include "logging.h" |
3e7ee490 HJ |
27 | #include "VmbusPrivate.h" |
28 | ||
454f18a9 | 29 | /* Internal routines */ |
aded7165 | 30 | static int VmbusChannelCreateGpadlHeader( |
f4266e34 GKH |
31 | void *Kbuffer, /* must be phys and virt contiguous */ |
32 | u32 Size, /* page-size multiple */ | |
aded7165 | 33 | struct vmbus_channel_msginfo **msgInfo, |
f4266e34 | 34 | u32 *MessageCount); |
aded7165 GKH |
35 | static void DumpVmbusChannel(struct vmbus_channel *channel); |
36 | static void VmbusChannelSetEvent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
37 | |
38 | ||
39 | #if 0 | |
f4266e34 | 40 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
3e7ee490 | 41 | { |
f4266e34 GKH |
42 | int i = 0; |
43 | int j = 0; | |
3e7ee490 | 44 | |
f4266e34 GKH |
45 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
46 | MonitorPage, MonitorPage->TriggerState); | |
3e7ee490 | 47 | |
f4266e34 GKH |
48 | for (i = 0; i < 4; i++) |
49 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, | |
50 | MonitorPage->TriggerGroup[i].AsUINT64); | |
3e7ee490 | 51 | |
f4266e34 GKH |
52 | for (i = 0; i < 4; i++) { |
53 | for (j = 0; j < 32; j++) { | |
54 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, | |
55 | MonitorPage->Latency[i][j]); | |
3e7ee490 HJ |
56 | } |
57 | } | |
f4266e34 GKH |
58 | for (i = 0; i < 4; i++) { |
59 | for (j = 0; j < 32; j++) { | |
60 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, | |
61 | MonitorPage->Parameter[i][j].ConnectionId.Asu32); | |
62 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, | |
63 | MonitorPage->Parameter[i][j].FlagNumber); | |
3e7ee490 HJ |
64 | } |
65 | } | |
66 | } | |
67 | #endif | |
68 | ||
3e189519 HJ |
69 | /* |
70 | * VmbusChannelSetEvent - Trigger an event notification on the specified | |
71 | * channel. | |
f4266e34 | 72 | */ |
aded7165 | 73 | static void VmbusChannelSetEvent(struct vmbus_channel *Channel) |
3e7ee490 | 74 | { |
eacb1b4d | 75 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
76 | |
77 | DPRINT_ENTER(VMBUS); | |
78 | ||
f4266e34 | 79 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 80 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
81 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
82 | (unsigned long *) gVmbusConnection.SendInterruptPage + | |
f4266e34 | 83 | (Channel->OfferMsg.ChildRelId >> 5)); |
3e7ee490 | 84 | |
f4266e34 | 85 | monitorPage = gVmbusConnection.MonitorPages; |
454f18a9 | 86 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 87 | |
7c369f40 | 88 | set_bit(Channel->MonitorBit, |
f4266e34 GKH |
89 | (unsigned long *)&monitorPage->TriggerGroup |
90 | [Channel->MonitorGroup].Pending); | |
7c369f40 | 91 | |
f4266e34 | 92 | } else { |
3e7ee490 HJ |
93 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); |
94 | } | |
95 | ||
96 | DPRINT_EXIT(VMBUS); | |
97 | } | |
98 | ||
99 | #if 0 | |
aded7165 | 100 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 101 | { |
eacb1b4d | 102 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
103 | |
104 | DPRINT_ENTER(VMBUS); | |
105 | ||
f4266e34 | 106 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 107 | /* Each u32 represents 32 channels */ |
7c369f40 | 108 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
f4266e34 GKH |
109 | (unsigned long *)gVmbusConnection.SendInterruptPage + |
110 | (Channel->OfferMsg.ChildRelId >> 5)); | |
3e7ee490 | 111 | |
f4266e34 GKH |
112 | monitorPage = |
113 | (struct hv_monitor_page *)gVmbusConnection.MonitorPages; | |
454f18a9 | 114 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 115 | |
7c369f40 | 116 | clear_bit(Channel->MonitorBit, |
f4266e34 GKH |
117 | (unsigned long *)&monitorPage->TriggerGroup |
118 | [Channel->MonitorGroup].Pending); | |
3e7ee490 HJ |
119 | } |
120 | ||
121 | DPRINT_EXIT(VMBUS); | |
122 | } | |
123 | ||
124 | #endif | |
3e189519 | 125 | /* |
f4266e34 GKH |
126 | * VmbusChannelGetDebugInfo -Retrieve various channel debug info |
127 | */ | |
aded7165 GKH |
128 | void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel, |
129 | struct vmbus_channel_debug_info *DebugInfo) | |
3e7ee490 | 130 | { |
eacb1b4d | 131 | struct hv_monitor_page *monitorPage; |
f4266e34 GKH |
132 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
133 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 134 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 HJ |
135 | |
136 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
137 | DebugInfo->State = Channel->State; | |
f4266e34 GKH |
138 | memcpy(&DebugInfo->InterfaceType, |
139 | &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); | |
140 | memcpy(&DebugInfo->InterfaceInstance, | |
141 | &Channel->OfferMsg.Offer.InterfaceInstance, | |
142 | sizeof(struct hv_guid)); | |
3e7ee490 | 143 | |
eacb1b4d | 144 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 HJ |
145 | |
146 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
147 | ||
f4266e34 GKH |
148 | DebugInfo->ServerMonitorPending = |
149 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
150 | DebugInfo->ServerMonitorLatency = | |
151 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
152 | DebugInfo->ServerMonitorConnectionId = | |
153 | monitorPage->Parameter[monitorGroup] | |
154 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
155 | |
156 | monitorPage++; | |
157 | ||
f4266e34 GKH |
158 | DebugInfo->ClientMonitorPending = |
159 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
160 | DebugInfo->ClientMonitorLatency = | |
161 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
162 | DebugInfo->ClientMonitorConnectionId = | |
163 | monitorPage->Parameter[monitorGroup] | |
164 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
165 | |
166 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
167 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
168 | } | |
169 | ||
3e189519 | 170 | /* |
f4266e34 GKH |
171 | * VmbusChannelOpen - Open the specified channel. |
172 | */ | |
173 | int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize, | |
174 | u32 RecvRingBufferSize, void *UserData, u32 UserDataLen, | |
79035069 | 175 | void (*OnChannelCallback)(void *context), void *Context) |
3e7ee490 | 176 | { |
82250213 | 177 | struct vmbus_channel_open_channel *openMsg; |
aded7165 | 178 | struct vmbus_channel_msginfo *openInfo; |
3e7ee490 | 179 | void *in, *out; |
dd0813b6 | 180 | unsigned long flags; |
f4266e34 | 181 | int ret; |
3e7ee490 HJ |
182 | |
183 | DPRINT_ENTER(VMBUS); | |
184 | ||
454f18a9 | 185 | /* Aligned to page size */ |
f4266e34 GKH |
186 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); |
187 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); | |
3e7ee490 | 188 | |
79035069 | 189 | NewChannel->OnChannelCallback = OnChannelCallback; |
3e7ee490 HJ |
190 | NewChannel->ChannelCallbackContext = Context; |
191 | ||
454f18a9 | 192 | /* Allocate the ring buffer */ |
f4266e34 GKH |
193 | out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize) |
194 | >> PAGE_SHIFT); | |
3e7ee490 | 195 | ASSERT(out); |
c4b0bc94 | 196 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 197 | |
f4266e34 | 198 | in = (void *)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
199 | |
200 | NewChannel->RingBufferPages = out; | |
f4266e34 GKH |
201 | NewChannel->RingBufferPageCount = (SendRingBufferSize + |
202 | RecvRingBufferSize) >> PAGE_SHIFT; | |
3e7ee490 HJ |
203 | |
204 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
205 | ||
206 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
207 | ||
454f18a9 | 208 | /* Establish the gpadl for the ring buffer */ |
f4266e34 GKH |
209 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
210 | NewChannel); | |
3e7ee490 HJ |
211 | |
212 | NewChannel->RingBufferGpadlHandle = 0; | |
213 | ||
214 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
f4266e34 GKH |
215 | NewChannel->Outbound.RingBuffer, |
216 | SendRingBufferSize + | |
217 | RecvRingBufferSize, | |
218 | &NewChannel->RingBufferGpadlHandle); | |
219 | ||
220 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
221 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
222 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
223 | NewChannel->RingBufferGpadlHandle, | |
224 | NewChannel->Outbound.RingBuffer, | |
225 | NewChannel->Outbound.RingSize, | |
226 | NewChannel->Inbound.RingBuffer, | |
227 | NewChannel->Inbound.RingSize, | |
228 | SendRingBufferSize); | |
3e7ee490 | 229 | |
454f18a9 | 230 | /* Create and init the channel open message */ |
f4266e34 GKH |
231 | openInfo = kmalloc(sizeof(*openInfo) + |
232 | sizeof(struct vmbus_channel_open_channel), | |
233 | GFP_KERNEL); | |
3e7ee490 HJ |
234 | ASSERT(openInfo != NULL); |
235 | ||
bfc30aae | 236 | openInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 237 | |
82250213 | 238 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
239 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
240 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
241 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
242 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
243 | ASSERT(openMsg->RingBufferGpadlHandle); | |
244 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> | |
245 | PAGE_SHIFT; | |
246 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 HJ |
247 | |
248 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
249 | if (UserDataLen) | |
3e7ee490 | 250 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 251 | |
dd0813b6 | 252 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
253 | list_add_tail(&openInfo->MsgListEntry, |
254 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 255 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
256 | |
257 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
258 | ||
f4266e34 GKH |
259 | ret = VmbusPostMessage(openMsg, |
260 | sizeof(struct vmbus_channel_open_channel)); | |
261 | if (ret != 0) { | |
3e7ee490 HJ |
262 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
263 | goto Cleanup; | |
264 | } | |
265 | ||
454f18a9 | 266 | /* FIXME: Need to time-out here */ |
bfc30aae | 267 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
268 | |
269 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 270 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 271 | else |
f4266e34 GKH |
272 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
273 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
274 | |
275 | Cleanup: | |
dd0813b6 | 276 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 277 | list_del(&openInfo->MsgListEntry); |
dd0813b6 | 278 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 279 | |
420beac4 | 280 | kfree(openInfo->WaitEvent); |
8c69f52a | 281 | kfree(openInfo); |
3e7ee490 HJ |
282 | |
283 | DPRINT_EXIT(VMBUS); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
3e189519 HJ |
288 | /* |
289 | * DumpGpadlBody - Dump the gpadl body message to the console for | |
290 | * debugging purposes. | |
f4266e34 | 291 | */ |
82250213 | 292 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 | 293 | { |
f4266e34 GKH |
294 | int i; |
295 | int pfnCount; | |
3e7ee490 | 296 | |
f4266e34 GKH |
297 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) / |
298 | sizeof(u64); | |
3e7ee490 HJ |
299 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
300 | ||
f4266e34 GKH |
301 | for (i = 0; i < pfnCount; i++) |
302 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", | |
303 | i, Gpadl->Pfn[i]); | |
3e7ee490 HJ |
304 | } |
305 | ||
3e189519 HJ |
306 | /* |
307 | * DumpGpadlHeader - Dump the gpadl header message to the console for | |
308 | * debugging purposes. | |
f4266e34 | 309 | */ |
82250213 | 310 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 | 311 | { |
f4266e34 GKH |
312 | int i, j; |
313 | int pageCount; | |
3e7ee490 | 314 | |
f4266e34 GKH |
315 | DPRINT_DBG(VMBUS, |
316 | "gpadl header - relid %d, range count %d, range buflen %d", | |
317 | Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen); | |
318 | for (i = 0; i < Gpadl->RangeCount; i++) { | |
3e7ee490 | 319 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
f4266e34 | 320 | pageCount = (pageCount > 26) ? 26 : pageCount; |
3e7ee490 | 321 | |
f4266e34 GKH |
322 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
323 | "page count %d", i, Gpadl->Range[i].ByteCount, | |
324 | Gpadl->Range[i].ByteOffset, pageCount); | |
3e7ee490 | 325 | |
f4266e34 GKH |
326 | for (j = 0; j < pageCount; j++) |
327 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, | |
328 | Gpadl->Range[i].PfnArray[j]); | |
3e7ee490 HJ |
329 | } |
330 | } | |
331 | ||
3e189519 | 332 | /* |
f4266e34 GKH |
333 | * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer |
334 | */ | |
335 | static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size, | |
336 | struct vmbus_channel_msginfo **MsgInfo, | |
337 | u32 *MessageCount) | |
3e7ee490 HJ |
338 | { |
339 | int i; | |
340 | int pageCount; | |
f4266e34 | 341 | unsigned long long pfn; |
82250213 GKH |
342 | struct vmbus_channel_gpadl_header *gpaHeader; |
343 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 GKH |
344 | struct vmbus_channel_msginfo *msgHeader; |
345 | struct vmbus_channel_msginfo *msgBody; | |
f4266e34 | 346 | u32 msgSize; |
3e7ee490 HJ |
347 | |
348 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
349 | ||
f4266e34 GKH |
350 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
351 | ASSERT((Size & (PAGE_SIZE-1)) == 0); | |
3e7ee490 HJ |
352 | |
353 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 354 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 355 | |
454f18a9 | 356 | /* do we need a gpadl body msg */ |
f4266e34 GKH |
357 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
358 | sizeof(struct vmbus_channel_gpadl_header) - | |
359 | sizeof(struct gpa_range); | |
59471438 | 360 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 361 | |
f4266e34 GKH |
362 | if (pageCount > pfnCount) { |
363 | /* we need a gpadl body */ | |
454f18a9 | 364 | /* fill in the header */ |
f4266e34 GKH |
365 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
366 | sizeof(struct vmbus_channel_gpadl_header) + | |
367 | sizeof(struct gpa_range) + pfnCount * sizeof(u64); | |
e276a3a5 | 368 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 | 369 | |
53af545b | 370 | INIT_LIST_HEAD(&msgHeader->SubMsgList); |
f4266e34 | 371 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 372 | |
82250213 | 373 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 374 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
375 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
376 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
377 | gpaHeader->Range[0].ByteOffset = 0; |
378 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 379 | for (i = 0; i < pfnCount; i++) |
3e7ee490 | 380 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
381 | *MsgInfo = msgHeader; |
382 | *MessageCount = 1; | |
383 | ||
384 | pfnSum = pfnCount; | |
385 | pfnLeft = pageCount - pfnCount; | |
386 | ||
454f18a9 | 387 | /* how many pfns can we fit */ |
f4266e34 GKH |
388 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
389 | sizeof(struct vmbus_channel_gpadl_body); | |
59471438 | 390 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 391 | |
454f18a9 | 392 | /* fill in the body */ |
f4266e34 | 393 | while (pfnLeft) { |
3e7ee490 | 394 | if (pfnLeft > pfnCount) |
3e7ee490 | 395 | pfnCurr = pfnCount; |
3e7ee490 | 396 | else |
3e7ee490 | 397 | pfnCurr = pfnLeft; |
3e7ee490 | 398 | |
f4266e34 GKH |
399 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
400 | sizeof(struct vmbus_channel_gpadl_body) + | |
401 | pfnCurr * sizeof(u64); | |
e276a3a5 | 402 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
403 | ASSERT(msgBody); |
404 | msgBody->MessageSize = msgSize; | |
405 | (*MessageCount)++; | |
f4266e34 GKH |
406 | gpadlBody = |
407 | (struct vmbus_channel_gpadl_body *)msgBody->Msg; | |
408 | ||
409 | /* | |
410 | * FIXME: | |
411 | * Gpadl is u32 and we are using a pointer which could | |
412 | * be 64-bit | |
413 | */ | |
454f18a9 | 414 | /* gpadlBody->Gpadl = kbuffer; */ |
f4266e34 | 415 | for (i = 0; i < pfnCurr; i++) |
3e7ee490 | 416 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
3e7ee490 | 417 | |
454f18a9 | 418 | /* add to msg header */ |
53af545b BP |
419 | list_add_tail(&msgBody->MsgListEntry, |
420 | &msgHeader->SubMsgList); | |
3e7ee490 HJ |
421 | pfnSum += pfnCurr; |
422 | pfnLeft -= pfnCurr; | |
423 | } | |
f4266e34 | 424 | } else { |
454f18a9 | 425 | /* everything fits in a header */ |
f4266e34 GKH |
426 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
427 | sizeof(struct vmbus_channel_gpadl_header) + | |
428 | sizeof(struct gpa_range) + pageCount * sizeof(u64); | |
e276a3a5 | 429 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
f4266e34 | 430 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 431 | |
82250213 | 432 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 433 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
434 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
435 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
436 | gpaHeader->Range[0].ByteOffset = 0; |
437 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 438 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 439 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
440 | |
441 | *MsgInfo = msgHeader; | |
442 | *MessageCount = 1; | |
443 | } | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
3e189519 | 448 | /* |
f4266e34 GKH |
449 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer |
450 | * | |
451 | * @Channel: a channel | |
452 | * @Kbuffer: from kmalloc | |
453 | * @Size: page-size multiple | |
454 | * @GpadlHandle: some funky thing | |
455 | */ | |
456 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
457 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 458 | { |
82250213 GKH |
459 | struct vmbus_channel_gpadl_header *gpadlMsg; |
460 | struct vmbus_channel_gpadl_body *gpadlBody; | |
461 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
aded7165 GKH |
462 | struct vmbus_channel_msginfo *msgInfo; |
463 | struct vmbus_channel_msginfo *subMsgInfo; | |
4d643114 | 464 | u32 msgCount; |
53af545b | 465 | struct list_head *curr; |
4d643114 | 466 | u32 nextGpadlHandle; |
dd0813b6 | 467 | unsigned long flags; |
f4266e34 | 468 | int ret; |
3e7ee490 HJ |
469 | |
470 | DPRINT_ENTER(VMBUS); | |
471 | ||
f4888417 BP |
472 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
473 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
474 | |
475 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
476 | ASSERT(msgInfo != NULL); | |
f4266e34 | 477 | ASSERT(msgCount > 0); |
3e7ee490 | 478 | |
bfc30aae | 479 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 480 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
481 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
482 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
483 | gpadlMsg->Gpadl = nextGpadlHandle; | |
484 | ||
485 | DumpGpadlHeader(gpadlMsg); | |
486 | ||
dd0813b6 | 487 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
488 | list_add_tail(&msgInfo->MsgListEntry, |
489 | &gVmbusConnection.ChannelMsgList); | |
3e7ee490 | 490 | |
53af545b | 491 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
492 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
493 | Kbuffer, Size, msgCount); | |
3e7ee490 | 494 | |
f4266e34 GKH |
495 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
496 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 497 | |
f4266e34 GKH |
498 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
499 | sizeof(*msgInfo)); | |
500 | if (ret != 0) { | |
3e7ee490 HJ |
501 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
502 | goto Cleanup; | |
503 | } | |
504 | ||
f4266e34 | 505 | if (msgCount > 1) { |
53af545b BP |
506 | list_for_each(curr, &msgInfo->SubMsgList) { |
507 | ||
508 | /* FIXME: should this use list_entry() instead ? */ | |
82250213 | 509 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
510 | gpadlBody = |
511 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
512 | |
513 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
514 | gpadlBody->Gpadl = nextGpadlHandle; | |
515 | ||
f4266e34 GKH |
516 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
517 | subMsgInfo->MessageSize - | |
518 | sizeof(*subMsgInfo)); | |
3e7ee490 | 519 | |
f4266e34 GKH |
520 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
521 | sizeof(*subMsgInfo)); | |
522 | ret = VmbusPostMessage(gpadlBody, | |
523 | subMsgInfo->MessageSize - | |
524 | sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
525 | ASSERT(ret == 0); |
526 | } | |
527 | } | |
bfc30aae | 528 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 529 | |
454f18a9 | 530 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
531 | DPRINT_DBG(VMBUS, "Received GPADL created " |
532 | "(relid %d, status %d handle %x)", | |
533 | Channel->OfferMsg.ChildRelId, | |
534 | msgInfo->Response.GpadlCreated.CreationStatus, | |
535 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
536 | |
537 | *GpadlHandle = gpadlMsg->Gpadl; | |
538 | ||
539 | Cleanup: | |
dd0813b6 | 540 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 541 | list_del(&msgInfo->MsgListEntry); |
dd0813b6 | 542 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 543 | |
420beac4 | 544 | kfree(msgInfo->WaitEvent); |
8c69f52a | 545 | kfree(msgInfo); |
3e7ee490 HJ |
546 | |
547 | DPRINT_EXIT(VMBUS); | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
3e189519 | 552 | /* |
f4266e34 GKH |
553 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle |
554 | */ | |
aded7165 | 555 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 556 | { |
82250213 | 557 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 558 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 559 | unsigned long flags; |
f4266e34 | 560 | int ret; |
3e7ee490 HJ |
561 | |
562 | DPRINT_ENTER(VMBUS); | |
563 | ||
564 | ASSERT(GpadlHandle != 0); | |
565 | ||
f4266e34 GKH |
566 | info = kmalloc(sizeof(*info) + |
567 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
3e7ee490 HJ |
568 | ASSERT(info != NULL); |
569 | ||
bfc30aae | 570 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 571 | |
82250213 | 572 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
573 | |
574 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
575 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
576 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 577 | |
dd0813b6 | 578 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
579 | list_add_tail(&info->MsgListEntry, |
580 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 581 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 582 | |
f4266e34 GKH |
583 | ret = VmbusPostMessage(msg, |
584 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
585 | if (ret != 0) { | |
454f18a9 | 586 | /* TODO: */ |
f4266e34 | 587 | /* something... */ |
3e7ee490 HJ |
588 | } |
589 | ||
bfc30aae | 590 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 591 | |
454f18a9 | 592 | /* Received a torndown response */ |
dd0813b6 | 593 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 594 | list_del(&info->MsgListEntry); |
dd0813b6 | 595 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 596 | |
420beac4 | 597 | kfree(info->WaitEvent); |
8c69f52a | 598 | kfree(info); |
3e7ee490 HJ |
599 | |
600 | DPRINT_EXIT(VMBUS); | |
601 | ||
602 | return ret; | |
603 | } | |
604 | ||
3e189519 | 605 | /* |
f4266e34 GKH |
606 | * VmbusChannelClose - Close the specified channel |
607 | */ | |
aded7165 | 608 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 609 | { |
82250213 | 610 | struct vmbus_channel_close_channel *msg; |
aded7165 | 611 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 612 | unsigned long flags; |
f4266e34 | 613 | int ret; |
3e7ee490 HJ |
614 | |
615 | DPRINT_ENTER(VMBUS); | |
616 | ||
454f18a9 | 617 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 618 | Channel->OnChannelCallback = NULL; |
5996b3dd | 619 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 620 | |
454f18a9 | 621 | /* Send a closing message */ |
f4266e34 GKH |
622 | info = kmalloc(sizeof(*info) + |
623 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
3e7ee490 HJ |
624 | ASSERT(info != NULL); |
625 | ||
bfc30aae | 626 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 627 | |
82250213 | 628 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
629 | msg->Header.MessageType = ChannelMessageCloseChannel; |
630 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 631 | |
82250213 | 632 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 633 | if (ret != 0) { |
454f18a9 | 634 | /* TODO: */ |
f4266e34 | 635 | /* something... */ |
3e7ee490 HJ |
636 | } |
637 | ||
454f18a9 | 638 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 639 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
640 | VmbusChannelTeardownGpadl(Channel, |
641 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 642 | |
454f18a9 | 643 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 644 | |
454f18a9 | 645 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
646 | RingBufferCleanup(&Channel->Outbound); |
647 | RingBufferCleanup(&Channel->Inbound); | |
648 | ||
bfc30aae | 649 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 650 | |
8c69f52a | 651 | kfree(info); |
3e7ee490 | 652 | |
454f18a9 BP |
653 | /* |
654 | * If we are closing the channel during an error path in | |
655 | * opening the channel, don't free the channel since the | |
656 | * caller will free the channel | |
657 | */ | |
658 | ||
f4266e34 | 659 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 660 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 661 | list_del(&Channel->ListEntry); |
0f5e44ca | 662 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
663 | |
664 | FreeVmbusChannel(Channel); | |
665 | } | |
666 | ||
667 | DPRINT_EXIT(VMBUS); | |
668 | } | |
669 | ||
c88c4e4c HJ |
670 | /** |
671 | * VmbusChannelSendPacket() - Send the specified buffer on the given channel | |
672 | * @Channel: Pointer to vmbus_channel structure. | |
673 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
674 | * @BufferLen: Maximum size of what the the buffer will hold | |
675 | * @RequestId: Identifier of the request | |
676 | * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time | |
677 | * packet etc. | |
678 | * | |
679 | * Sends data in @Buffer directly to hyper-v via the vmbus | |
680 | * This will send the data unparsed to hyper-v. | |
681 | * | |
682 | * Mainly used by Hyper-V drivers. | |
f4266e34 GKH |
683 | */ |
684 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
685 | u32 BufferLen, u64 RequestId, | |
686 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 687 | { |
8dc0a06a GKH |
688 | struct vmpacket_descriptor desc; |
689 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 690 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 691 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
692 | u64 alignedData = 0; |
693 | int ret; | |
3e7ee490 HJ |
694 | |
695 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
696 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
697 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
698 | |
699 | DumpVmbusChannel(Channel); | |
700 | ||
59471438 | 701 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 702 | |
454f18a9 BP |
703 | /* Setup the descriptor */ |
704 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
705 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
706 | /* in 8-bytes granularity */ |
707 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
708 | desc.Length8 = (u16)(packetLenAligned >> 3); |
709 | desc.TransactionId = RequestId; | |
3e7ee490 | 710 | |
f4266e34 | 711 | sg_init_table(bufferList, 3); |
8dc0a06a | 712 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
713 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
714 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 715 | |
f4266e34 | 716 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 717 | |
454f18a9 | 718 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 719 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 720 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
721 | |
722 | DPRINT_EXIT(VMBUS); | |
723 | ||
724 | return ret; | |
725 | } | |
c88c4e4c | 726 | EXPORT_SYMBOL(VmbusChannelSendPacket); |
3e7ee490 | 727 | |
3e189519 HJ |
728 | /* |
729 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer | |
730 | * packets using a GPADL Direct packet type. | |
f4266e34 | 731 | */ |
aded7165 | 732 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
733 | struct hv_page_buffer PageBuffers[], |
734 | u32 PageCount, void *Buffer, u32 BufferLen, | |
735 | u64 RequestId) | |
3e7ee490 | 736 | { |
f4266e34 GKH |
737 | int ret; |
738 | int i; | |
0cf4fa80 | 739 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
740 | u32 descSize; |
741 | u32 packetLen; | |
742 | u32 packetLenAligned; | |
b219b3f7 | 743 | struct scatterlist bufferList[3]; |
f4266e34 | 744 | u64 alignedData = 0; |
3e7ee490 HJ |
745 | |
746 | DPRINT_ENTER(VMBUS); | |
747 | ||
748 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
749 | ||
750 | DumpVmbusChannel(Channel); | |
751 | ||
f4266e34 GKH |
752 | /* |
753 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
754 | * largest size we support | |
755 | */ | |
756 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
757 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
758 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 759 | packetLen = descSize + BufferLen; |
59471438 | 760 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 761 | |
59471438 | 762 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 763 | |
454f18a9 | 764 | /* Setup the descriptor */ |
3e7ee490 HJ |
765 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
766 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
767 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
768 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
769 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
770 | desc.RangeCount = PageCount; |
771 | ||
f4266e34 | 772 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
773 | desc.Range[i].Length = PageBuffers[i].Length; |
774 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
775 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
776 | } | |
777 | ||
f4266e34 | 778 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
779 | sg_set_buf(&bufferList[0], &desc, descSize); |
780 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
781 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 782 | |
f4266e34 | 783 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 784 | |
454f18a9 | 785 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 786 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 787 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
788 | |
789 | DPRINT_EXIT(VMBUS); | |
790 | ||
791 | return ret; | |
792 | } | |
793 | ||
3e189519 HJ |
794 | /* |
795 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet | |
796 | * using a GPADL Direct packet type. | |
f4266e34 | 797 | */ |
aded7165 | 798 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
799 | struct hv_multipage_buffer *MultiPageBuffer, |
800 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 801 | { |
f4266e34 | 802 | int ret; |
3fcc523a | 803 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
804 | u32 descSize; |
805 | u32 packetLen; | |
806 | u32 packetLenAligned; | |
b219b3f7 | 807 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
808 | u64 alignedData = 0; |
809 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
810 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
811 | |
812 | DPRINT_ENTER(VMBUS); | |
813 | ||
814 | DumpVmbusChannel(Channel); | |
815 | ||
f4266e34 GKH |
816 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
817 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 HJ |
818 | |
819 | ASSERT(PfnCount > 0); | |
820 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
821 | ||
f4266e34 GKH |
822 | /* |
823 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
824 | * the largest size we support | |
825 | */ | |
826 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
827 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
828 | sizeof(u64)); | |
3e7ee490 | 829 | packetLen = descSize + BufferLen; |
59471438 | 830 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 831 | |
59471438 | 832 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 833 | |
454f18a9 | 834 | /* Setup the descriptor */ |
3e7ee490 HJ |
835 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
836 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
837 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
838 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
839 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
840 | desc.RangeCount = 1; |
841 | ||
842 | desc.Range.Length = MultiPageBuffer->Length; | |
843 | desc.Range.Offset = MultiPageBuffer->Offset; | |
844 | ||
f4266e34 GKH |
845 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
846 | PfnCount * sizeof(u64)); | |
3e7ee490 | 847 | |
f4266e34 | 848 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
849 | sg_set_buf(&bufferList[0], &desc, descSize); |
850 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
851 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 852 | |
f4266e34 | 853 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 854 | |
454f18a9 | 855 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 856 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 857 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
858 | |
859 | DPRINT_EXIT(VMBUS); | |
860 | ||
861 | return ret; | |
862 | } | |
863 | ||
c88c4e4c HJ |
864 | |
865 | /** | |
866 | * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel | |
867 | * @Channel: Pointer to vmbus_channel structure. | |
868 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
869 | * @BufferLen: Maximum size of what the the buffer will hold | |
870 | * @BufferActualLen: The actual size of the data after it was received | |
871 | * @RequestId: Identifier of the request | |
872 | * | |
873 | * Receives directly from the hyper-v vmbus and puts the data it received | |
874 | * into Buffer. This will receive the data unparsed from hyper-v. | |
875 | * | |
876 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 877 | */ |
f4266e34 GKH |
878 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
879 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 880 | { |
8dc0a06a | 881 | struct vmpacket_descriptor desc; |
4d643114 GKH |
882 | u32 packetLen; |
883 | u32 userLen; | |
3e7ee490 | 884 | int ret; |
54411c42 | 885 | unsigned long flags; |
3e7ee490 HJ |
886 | |
887 | DPRINT_ENTER(VMBUS); | |
888 | ||
889 | *BufferActualLen = 0; | |
890 | *RequestId = 0; | |
891 | ||
54411c42 | 892 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 893 | |
f4266e34 GKH |
894 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
895 | sizeof(struct vmpacket_descriptor)); | |
896 | if (ret != 0) { | |
54411c42 | 897 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 898 | |
454f18a9 | 899 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
900 | DPRINT_EXIT(VMBUS); |
901 | return 0; | |
902 | } | |
903 | ||
454f18a9 | 904 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
905 | |
906 | packetLen = desc.Length8 << 3; | |
907 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 908 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 909 | |
f4266e34 GKH |
910 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
911 | "flag %d tid %llx pktlen %d datalen %d> ", | |
912 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
913 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
914 | |
915 | *BufferActualLen = userLen; | |
916 | ||
f4266e34 | 917 | if (userLen > BufferLen) { |
54411c42 | 918 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 919 | |
f4266e34 GKH |
920 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
921 | BufferLen, userLen); | |
3e7ee490 HJ |
922 | DPRINT_EXIT(VMBUS); |
923 | ||
924 | return -1; | |
925 | } | |
926 | ||
927 | *RequestId = desc.TransactionId; | |
928 | ||
454f18a9 | 929 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
930 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
931 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 932 | |
54411c42 | 933 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
934 | |
935 | DPRINT_EXIT(VMBUS); | |
936 | ||
937 | return 0; | |
938 | } | |
c88c4e4c | 939 | EXPORT_SYMBOL(VmbusChannelRecvPacket); |
3e7ee490 | 940 | |
3e189519 | 941 | /* |
f4266e34 GKH |
942 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel |
943 | */ | |
944 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
945 | u32 BufferLen, u32 *BufferActualLen, | |
946 | u64 *RequestId) | |
3e7ee490 | 947 | { |
8dc0a06a | 948 | struct vmpacket_descriptor desc; |
4d643114 GKH |
949 | u32 packetLen; |
950 | u32 userLen; | |
3e7ee490 | 951 | int ret; |
54411c42 | 952 | unsigned long flags; |
3e7ee490 HJ |
953 | |
954 | DPRINT_ENTER(VMBUS); | |
955 | ||
956 | *BufferActualLen = 0; | |
957 | *RequestId = 0; | |
958 | ||
54411c42 | 959 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 960 | |
f4266e34 GKH |
961 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
962 | sizeof(struct vmpacket_descriptor)); | |
963 | if (ret != 0) { | |
54411c42 | 964 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 965 | |
454f18a9 | 966 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
967 | DPRINT_EXIT(VMBUS); |
968 | return 0; | |
969 | } | |
970 | ||
454f18a9 | 971 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
972 | |
973 | packetLen = desc.Length8 << 3; | |
974 | userLen = packetLen - (desc.DataOffset8 << 3); | |
975 | ||
f4266e34 GKH |
976 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
977 | "flag %d tid %llx pktlen %d datalen %d> ", | |
978 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
979 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
980 | |
981 | *BufferActualLen = packetLen; | |
982 | ||
f4266e34 | 983 | if (packetLen > BufferLen) { |
54411c42 | 984 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 985 | |
f4266e34 GKH |
986 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
987 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
988 | DPRINT_EXIT(VMBUS); |
989 | return -2; | |
990 | } | |
991 | ||
992 | *RequestId = desc.TransactionId; | |
993 | ||
454f18a9 | 994 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
995 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
996 | ||
54411c42 | 997 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
998 | |
999 | DPRINT_EXIT(VMBUS); | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
3e189519 | 1004 | /* |
f4266e34 GKH |
1005 | * VmbusChannelOnChannelEvent - Channel event callback |
1006 | */ | |
aded7165 | 1007 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1008 | { |
1009 | DumpVmbusChannel(Channel); | |
1010 | ASSERT(Channel->OnChannelCallback); | |
5996b3dd | 1011 | |
3e7ee490 | 1012 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
5996b3dd HZ |
1013 | |
1014 | mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100)); | |
3e7ee490 HJ |
1015 | } |
1016 | ||
3e189519 | 1017 | /* |
f4266e34 GKH |
1018 | * VmbusChannelOnTimer - Timer event callback |
1019 | */ | |
46a05253 | 1020 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1021 | { |
aded7165 | 1022 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1023 | |
0fa37b1e | 1024 | if (channel->OnChannelCallback) |
3e7ee490 | 1025 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
1026 | } |
1027 | ||
3e189519 | 1028 | /* |
f4266e34 GKH |
1029 | * DumpVmbusChannel - Dump vmbus channel info to the console |
1030 | */ | |
aded7165 | 1031 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1032 | { |
1033 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1034 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1035 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1036 | } |