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> |
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, | |
79035069 | 172 | void (*OnChannelCallback)(void *context), 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 | 185 | |
79035069 | 186 | NewChannel->OnChannelCallback = OnChannelCallback; |
3e7ee490 HJ |
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); |
53af545b BP |
250 | list_add_tail(&openInfo->MsgListEntry, |
251 | &gVmbusConnection.ChannelMsgList); | |
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); |
53af545b | 274 | list_del(&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 | 364 | |
53af545b | 365 | INIT_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 */ |
53af545b BP |
414 | list_add_tail(&msgBody->MsgListEntry, |
415 | &msgHeader->SubMsgList); | |
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; |
53af545b | 460 | struct list_head *curr; |
4d643114 | 461 | u32 nextGpadlHandle; |
dd0813b6 | 462 | unsigned long flags; |
f4266e34 | 463 | int ret; |
3e7ee490 HJ |
464 | |
465 | DPRINT_ENTER(VMBUS); | |
466 | ||
f4888417 BP |
467 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
468 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
469 | |
470 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
471 | ASSERT(msgInfo != NULL); | |
f4266e34 | 472 | ASSERT(msgCount > 0); |
3e7ee490 | 473 | |
bfc30aae | 474 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 475 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
476 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
477 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
478 | gpadlMsg->Gpadl = nextGpadlHandle; | |
479 | ||
480 | DumpGpadlHeader(gpadlMsg); | |
481 | ||
dd0813b6 | 482 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
483 | list_add_tail(&msgInfo->MsgListEntry, |
484 | &gVmbusConnection.ChannelMsgList); | |
3e7ee490 | 485 | |
53af545b | 486 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
487 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
488 | Kbuffer, Size, msgCount); | |
3e7ee490 | 489 | |
f4266e34 GKH |
490 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
491 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 492 | |
f4266e34 GKH |
493 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
494 | sizeof(*msgInfo)); | |
495 | if (ret != 0) { | |
3e7ee490 HJ |
496 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
497 | goto Cleanup; | |
498 | } | |
499 | ||
f4266e34 | 500 | if (msgCount > 1) { |
53af545b BP |
501 | list_for_each(curr, &msgInfo->SubMsgList) { |
502 | ||
503 | /* FIXME: should this use list_entry() instead ? */ | |
82250213 | 504 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
505 | gpadlBody = |
506 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
507 | |
508 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
509 | gpadlBody->Gpadl = nextGpadlHandle; | |
510 | ||
f4266e34 GKH |
511 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
512 | subMsgInfo->MessageSize - | |
513 | sizeof(*subMsgInfo)); | |
3e7ee490 | 514 | |
f4266e34 GKH |
515 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
516 | sizeof(*subMsgInfo)); | |
517 | ret = VmbusPostMessage(gpadlBody, | |
518 | subMsgInfo->MessageSize - | |
519 | sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
520 | ASSERT(ret == 0); |
521 | } | |
522 | } | |
bfc30aae | 523 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 524 | |
454f18a9 | 525 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
526 | DPRINT_DBG(VMBUS, "Received GPADL created " |
527 | "(relid %d, status %d handle %x)", | |
528 | Channel->OfferMsg.ChildRelId, | |
529 | msgInfo->Response.GpadlCreated.CreationStatus, | |
530 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
531 | |
532 | *GpadlHandle = gpadlMsg->Gpadl; | |
533 | ||
534 | Cleanup: | |
dd0813b6 | 535 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 536 | list_del(&msgInfo->MsgListEntry); |
dd0813b6 | 537 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 538 | |
420beac4 | 539 | kfree(msgInfo->WaitEvent); |
8c69f52a | 540 | kfree(msgInfo); |
3e7ee490 HJ |
541 | |
542 | DPRINT_EXIT(VMBUS); | |
543 | ||
544 | return ret; | |
545 | } | |
546 | ||
f4266e34 GKH |
547 | /** |
548 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle | |
549 | */ | |
aded7165 | 550 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 551 | { |
82250213 | 552 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 553 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 554 | unsigned long flags; |
f4266e34 | 555 | int ret; |
3e7ee490 HJ |
556 | |
557 | DPRINT_ENTER(VMBUS); | |
558 | ||
559 | ASSERT(GpadlHandle != 0); | |
560 | ||
f4266e34 GKH |
561 | info = kmalloc(sizeof(*info) + |
562 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
3e7ee490 HJ |
563 | ASSERT(info != NULL); |
564 | ||
bfc30aae | 565 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 566 | |
82250213 | 567 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
568 | |
569 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
570 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
571 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 572 | |
dd0813b6 | 573 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
574 | list_add_tail(&info->MsgListEntry, |
575 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 576 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 577 | |
f4266e34 GKH |
578 | ret = VmbusPostMessage(msg, |
579 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
580 | if (ret != 0) { | |
454f18a9 | 581 | /* TODO: */ |
f4266e34 | 582 | /* something... */ |
3e7ee490 HJ |
583 | } |
584 | ||
bfc30aae | 585 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 586 | |
454f18a9 | 587 | /* Received a torndown response */ |
dd0813b6 | 588 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 589 | list_del(&info->MsgListEntry); |
dd0813b6 | 590 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 591 | |
420beac4 | 592 | kfree(info->WaitEvent); |
8c69f52a | 593 | kfree(info); |
3e7ee490 HJ |
594 | |
595 | DPRINT_EXIT(VMBUS); | |
596 | ||
597 | return ret; | |
598 | } | |
599 | ||
f4266e34 GKH |
600 | /** |
601 | * VmbusChannelClose - Close the specified channel | |
602 | */ | |
aded7165 | 603 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 604 | { |
82250213 | 605 | struct vmbus_channel_close_channel *msg; |
aded7165 | 606 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 607 | unsigned long flags; |
f4266e34 | 608 | int ret; |
3e7ee490 HJ |
609 | |
610 | DPRINT_ENTER(VMBUS); | |
611 | ||
454f18a9 | 612 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 613 | Channel->OnChannelCallback = NULL; |
c8a429a4 | 614 | del_timer(&Channel->poll_timer); |
3e7ee490 | 615 | |
454f18a9 | 616 | /* Send a closing message */ |
f4266e34 GKH |
617 | info = kmalloc(sizeof(*info) + |
618 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
3e7ee490 HJ |
619 | ASSERT(info != NULL); |
620 | ||
bfc30aae | 621 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 622 | |
82250213 | 623 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
624 | msg->Header.MessageType = ChannelMessageCloseChannel; |
625 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 626 | |
82250213 | 627 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 628 | if (ret != 0) { |
454f18a9 | 629 | /* TODO: */ |
f4266e34 | 630 | /* something... */ |
3e7ee490 HJ |
631 | } |
632 | ||
454f18a9 | 633 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 634 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
635 | VmbusChannelTeardownGpadl(Channel, |
636 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 637 | |
454f18a9 | 638 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 639 | |
454f18a9 | 640 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
641 | RingBufferCleanup(&Channel->Outbound); |
642 | RingBufferCleanup(&Channel->Inbound); | |
643 | ||
bfc30aae | 644 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 645 | |
8c69f52a | 646 | kfree(info); |
3e7ee490 | 647 | |
454f18a9 BP |
648 | /* |
649 | * If we are closing the channel during an error path in | |
650 | * opening the channel, don't free the channel since the | |
651 | * caller will free the channel | |
652 | */ | |
653 | ||
f4266e34 | 654 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 655 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 656 | list_del(&Channel->ListEntry); |
0f5e44ca | 657 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
658 | |
659 | FreeVmbusChannel(Channel); | |
660 | } | |
661 | ||
662 | DPRINT_EXIT(VMBUS); | |
663 | } | |
664 | ||
f4266e34 GKH |
665 | /** |
666 | * VmbusChannelSendPacket - Send the specified buffer on the given channel | |
667 | */ | |
668 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
669 | u32 BufferLen, u64 RequestId, | |
670 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 671 | { |
8dc0a06a GKH |
672 | struct vmpacket_descriptor desc; |
673 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 674 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 675 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
676 | u64 alignedData = 0; |
677 | int ret; | |
3e7ee490 HJ |
678 | |
679 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
680 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
681 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
682 | |
683 | DumpVmbusChannel(Channel); | |
684 | ||
59471438 | 685 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 686 | |
454f18a9 BP |
687 | /* Setup the descriptor */ |
688 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
689 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
690 | /* in 8-bytes granularity */ |
691 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
692 | desc.Length8 = (u16)(packetLenAligned >> 3); |
693 | desc.TransactionId = RequestId; | |
3e7ee490 | 694 | |
f4266e34 | 695 | sg_init_table(bufferList, 3); |
8dc0a06a | 696 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
697 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
698 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 699 | |
f4266e34 | 700 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 701 | |
454f18a9 | 702 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 703 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 704 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
705 | |
706 | DPRINT_EXIT(VMBUS); | |
707 | ||
708 | return ret; | |
709 | } | |
710 | ||
f4266e34 GKH |
711 | /** |
712 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer packets using a GPADL Direct packet type. | |
713 | */ | |
aded7165 | 714 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
715 | struct hv_page_buffer PageBuffers[], |
716 | u32 PageCount, void *Buffer, u32 BufferLen, | |
717 | u64 RequestId) | |
3e7ee490 | 718 | { |
f4266e34 GKH |
719 | int ret; |
720 | int i; | |
0cf4fa80 | 721 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
722 | u32 descSize; |
723 | u32 packetLen; | |
724 | u32 packetLenAligned; | |
b219b3f7 | 725 | struct scatterlist bufferList[3]; |
f4266e34 | 726 | u64 alignedData = 0; |
3e7ee490 HJ |
727 | |
728 | DPRINT_ENTER(VMBUS); | |
729 | ||
730 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
731 | ||
732 | DumpVmbusChannel(Channel); | |
733 | ||
f4266e34 GKH |
734 | /* |
735 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
736 | * largest size we support | |
737 | */ | |
738 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
739 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
740 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 741 | packetLen = descSize + BufferLen; |
59471438 | 742 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 743 | |
59471438 | 744 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 745 | |
454f18a9 | 746 | /* Setup the descriptor */ |
3e7ee490 HJ |
747 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
748 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
749 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
750 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
751 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
752 | desc.RangeCount = PageCount; |
753 | ||
f4266e34 | 754 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
755 | desc.Range[i].Length = PageBuffers[i].Length; |
756 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
757 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
758 | } | |
759 | ||
f4266e34 | 760 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
761 | sg_set_buf(&bufferList[0], &desc, descSize); |
762 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
763 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 764 | |
f4266e34 | 765 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 766 | |
454f18a9 | 767 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 768 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 769 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
770 | |
771 | DPRINT_EXIT(VMBUS); | |
772 | ||
773 | return ret; | |
774 | } | |
775 | ||
f4266e34 GKH |
776 | /** |
777 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet using a GPADL Direct packet type. | |
778 | */ | |
aded7165 | 779 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
780 | struct hv_multipage_buffer *MultiPageBuffer, |
781 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 782 | { |
f4266e34 | 783 | int ret; |
3fcc523a | 784 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
785 | u32 descSize; |
786 | u32 packetLen; | |
787 | u32 packetLenAligned; | |
b219b3f7 | 788 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
789 | u64 alignedData = 0; |
790 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
791 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
792 | |
793 | DPRINT_ENTER(VMBUS); | |
794 | ||
795 | DumpVmbusChannel(Channel); | |
796 | ||
f4266e34 GKH |
797 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
798 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 HJ |
799 | |
800 | ASSERT(PfnCount > 0); | |
801 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
802 | ||
f4266e34 GKH |
803 | /* |
804 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
805 | * the largest size we support | |
806 | */ | |
807 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
808 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
809 | sizeof(u64)); | |
3e7ee490 | 810 | packetLen = descSize + BufferLen; |
59471438 | 811 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 812 | |
59471438 | 813 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 814 | |
454f18a9 | 815 | /* Setup the descriptor */ |
3e7ee490 HJ |
816 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
817 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
818 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
819 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
820 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
821 | desc.RangeCount = 1; |
822 | ||
823 | desc.Range.Length = MultiPageBuffer->Length; | |
824 | desc.Range.Offset = MultiPageBuffer->Offset; | |
825 | ||
f4266e34 GKH |
826 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
827 | PfnCount * sizeof(u64)); | |
3e7ee490 | 828 | |
f4266e34 | 829 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
830 | sg_set_buf(&bufferList[0], &desc, descSize); |
831 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
832 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 833 | |
f4266e34 | 834 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 835 | |
454f18a9 | 836 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 837 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 838 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
839 | |
840 | DPRINT_EXIT(VMBUS); | |
841 | ||
842 | return ret; | |
843 | } | |
844 | ||
f4266e34 GKH |
845 | /** |
846 | * VmbusChannelRecvPacket - Retrieve the user packet on the specified channel | |
847 | */ | |
454f18a9 | 848 | /* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */ |
f4266e34 GKH |
849 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
850 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 851 | { |
8dc0a06a | 852 | struct vmpacket_descriptor desc; |
4d643114 GKH |
853 | u32 packetLen; |
854 | u32 userLen; | |
3e7ee490 | 855 | int ret; |
54411c42 | 856 | unsigned long flags; |
3e7ee490 HJ |
857 | |
858 | DPRINT_ENTER(VMBUS); | |
859 | ||
860 | *BufferActualLen = 0; | |
861 | *RequestId = 0; | |
862 | ||
54411c42 | 863 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 864 | |
f4266e34 GKH |
865 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
866 | sizeof(struct vmpacket_descriptor)); | |
867 | if (ret != 0) { | |
54411c42 | 868 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 869 | |
454f18a9 | 870 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
871 | DPRINT_EXIT(VMBUS); |
872 | return 0; | |
873 | } | |
874 | ||
454f18a9 | 875 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
876 | |
877 | packetLen = desc.Length8 << 3; | |
878 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 879 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 880 | |
f4266e34 GKH |
881 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
882 | "flag %d tid %llx pktlen %d datalen %d> ", | |
883 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
884 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
885 | |
886 | *BufferActualLen = userLen; | |
887 | ||
f4266e34 | 888 | if (userLen > BufferLen) { |
54411c42 | 889 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 890 | |
f4266e34 GKH |
891 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
892 | BufferLen, userLen); | |
3e7ee490 HJ |
893 | DPRINT_EXIT(VMBUS); |
894 | ||
895 | return -1; | |
896 | } | |
897 | ||
898 | *RequestId = desc.TransactionId; | |
899 | ||
454f18a9 | 900 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
901 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
902 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 903 | |
54411c42 | 904 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
905 | |
906 | DPRINT_EXIT(VMBUS); | |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
f4266e34 GKH |
911 | /** |
912 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel | |
913 | */ | |
914 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
915 | u32 BufferLen, u32 *BufferActualLen, | |
916 | u64 *RequestId) | |
3e7ee490 | 917 | { |
8dc0a06a | 918 | struct vmpacket_descriptor desc; |
4d643114 GKH |
919 | u32 packetLen; |
920 | u32 userLen; | |
3e7ee490 | 921 | int ret; |
54411c42 | 922 | unsigned long flags; |
3e7ee490 HJ |
923 | |
924 | DPRINT_ENTER(VMBUS); | |
925 | ||
926 | *BufferActualLen = 0; | |
927 | *RequestId = 0; | |
928 | ||
54411c42 | 929 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 930 | |
f4266e34 GKH |
931 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
932 | sizeof(struct vmpacket_descriptor)); | |
933 | if (ret != 0) { | |
54411c42 | 934 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 935 | |
454f18a9 | 936 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
937 | DPRINT_EXIT(VMBUS); |
938 | return 0; | |
939 | } | |
940 | ||
454f18a9 | 941 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
942 | |
943 | packetLen = desc.Length8 << 3; | |
944 | userLen = packetLen - (desc.DataOffset8 << 3); | |
945 | ||
f4266e34 GKH |
946 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
947 | "flag %d tid %llx pktlen %d datalen %d> ", | |
948 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
949 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
950 | |
951 | *BufferActualLen = packetLen; | |
952 | ||
f4266e34 | 953 | if (packetLen > BufferLen) { |
54411c42 | 954 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 955 | |
f4266e34 GKH |
956 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
957 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
958 | DPRINT_EXIT(VMBUS); |
959 | return -2; | |
960 | } | |
961 | ||
962 | *RequestId = desc.TransactionId; | |
963 | ||
454f18a9 | 964 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
965 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
966 | ||
54411c42 | 967 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
968 | |
969 | DPRINT_EXIT(VMBUS); | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
f4266e34 GKH |
974 | /** |
975 | * VmbusChannelOnChannelEvent - Channel event callback | |
976 | */ | |
aded7165 | 977 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
978 | { |
979 | DumpVmbusChannel(Channel); | |
980 | ASSERT(Channel->OnChannelCallback); | |
981 | #ifdef ENABLE_POLLING | |
c8a429a4 | 982 | del_timer(&Channel->poll_timer); |
3e7ee490 | 983 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
c8a429a4 GKH |
984 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
985 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
986 | #else |
987 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); | |
988 | #endif | |
989 | } | |
990 | ||
f4266e34 GKH |
991 | /** |
992 | * VmbusChannelOnTimer - Timer event callback | |
993 | */ | |
46a05253 | 994 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 995 | { |
aded7165 | 996 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 997 | |
f4266e34 | 998 | if (channel->OnChannelCallback) { |
3e7ee490 HJ |
999 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
1000 | #ifdef ENABLE_POLLING | |
c8a429a4 GKH |
1001 | channel->poll_timer.expires(jiffies + usecs_to_jiffies(100); |
1002 | add_timer(&channel->poll_timer); | |
3e7ee490 HJ |
1003 | #endif |
1004 | } | |
1005 | } | |
1006 | ||
f4266e34 GKH |
1007 | /** |
1008 | * DumpVmbusChannel - Dump vmbus channel info to the console | |
1009 | */ | |
aded7165 | 1010 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1011 | { |
1012 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1013 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1014 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1015 | } |