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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> |
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; |
c3bf2e26 | 181 | int ret, err = 0; |
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); | |
7e052d98 BP |
195 | if (!out) |
196 | return -ENOMEM; | |
197 | ||
c4b0bc94 | 198 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 199 | |
f4266e34 | 200 | in = (void *)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
201 | |
202 | NewChannel->RingBufferPages = out; | |
f4266e34 GKH |
203 | NewChannel->RingBufferPageCount = (SendRingBufferSize + |
204 | RecvRingBufferSize) >> PAGE_SHIFT; | |
3e7ee490 HJ |
205 | |
206 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
207 | ||
208 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
209 | ||
454f18a9 | 210 | /* Establish the gpadl for the ring buffer */ |
f4266e34 GKH |
211 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
212 | NewChannel); | |
3e7ee490 HJ |
213 | |
214 | NewChannel->RingBufferGpadlHandle = 0; | |
215 | ||
216 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
f4266e34 GKH |
217 | NewChannel->Outbound.RingBuffer, |
218 | SendRingBufferSize + | |
219 | RecvRingBufferSize, | |
220 | &NewChannel->RingBufferGpadlHandle); | |
c3bf2e26 | 221 | /* FIXME: the value of ret is not checked */ |
f4266e34 GKH |
222 | |
223 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
224 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
225 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
226 | NewChannel->RingBufferGpadlHandle, | |
227 | NewChannel->Outbound.RingBuffer, | |
228 | NewChannel->Outbound.RingSize, | |
229 | NewChannel->Inbound.RingBuffer, | |
230 | NewChannel->Inbound.RingSize, | |
231 | SendRingBufferSize); | |
3e7ee490 | 232 | |
454f18a9 | 233 | /* Create and init the channel open message */ |
f4266e34 GKH |
234 | openInfo = kmalloc(sizeof(*openInfo) + |
235 | sizeof(struct vmbus_channel_open_channel), | |
236 | GFP_KERNEL); | |
c3bf2e26 BP |
237 | if (!openInfo) { |
238 | err = -ENOMEM; | |
239 | goto errorout; | |
240 | } | |
3e7ee490 | 241 | |
bfc30aae | 242 | openInfo->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
243 | if (!openInfo->WaitEvent) { |
244 | err = -ENOMEM; | |
245 | goto errorout; | |
246 | } | |
3e7ee490 | 247 | |
82250213 | 248 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
249 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
250 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
251 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
252 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
253 | ASSERT(openMsg->RingBufferGpadlHandle); | |
254 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> | |
255 | PAGE_SHIFT; | |
256 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 HJ |
257 | |
258 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
259 | if (UserDataLen) | |
3e7ee490 | 260 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 261 | |
dd0813b6 | 262 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
263 | list_add_tail(&openInfo->MsgListEntry, |
264 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 265 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
266 | |
267 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
268 | ||
f4266e34 GKH |
269 | ret = VmbusPostMessage(openMsg, |
270 | sizeof(struct vmbus_channel_open_channel)); | |
271 | if (ret != 0) { | |
3e7ee490 HJ |
272 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
273 | goto Cleanup; | |
274 | } | |
275 | ||
454f18a9 | 276 | /* FIXME: Need to time-out here */ |
bfc30aae | 277 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
278 | |
279 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 280 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 281 | else |
f4266e34 GKH |
282 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
283 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
284 | |
285 | Cleanup: | |
dd0813b6 | 286 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 287 | list_del(&openInfo->MsgListEntry); |
dd0813b6 | 288 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 289 | |
420beac4 | 290 | kfree(openInfo->WaitEvent); |
8c69f52a | 291 | kfree(openInfo); |
3e7ee490 HJ |
292 | |
293 | DPRINT_EXIT(VMBUS); | |
294 | ||
295 | return 0; | |
c3bf2e26 BP |
296 | |
297 | errorout: | |
298 | osd_PageFree(out, (SendRingBufferSize + RecvRingBufferSize) | |
299 | >> PAGE_SHIFT); | |
300 | kfree(openInfo); | |
301 | return err; | |
3e7ee490 HJ |
302 | } |
303 | ||
3e189519 HJ |
304 | /* |
305 | * DumpGpadlBody - Dump the gpadl body message to the console for | |
306 | * debugging purposes. | |
f4266e34 | 307 | */ |
82250213 | 308 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 | 309 | { |
f4266e34 GKH |
310 | int i; |
311 | int pfnCount; | |
3e7ee490 | 312 | |
f4266e34 GKH |
313 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) / |
314 | sizeof(u64); | |
3e7ee490 HJ |
315 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
316 | ||
f4266e34 GKH |
317 | for (i = 0; i < pfnCount; i++) |
318 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", | |
319 | i, Gpadl->Pfn[i]); | |
3e7ee490 HJ |
320 | } |
321 | ||
3e189519 HJ |
322 | /* |
323 | * DumpGpadlHeader - Dump the gpadl header message to the console for | |
324 | * debugging purposes. | |
f4266e34 | 325 | */ |
82250213 | 326 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 | 327 | { |
f4266e34 GKH |
328 | int i, j; |
329 | int pageCount; | |
3e7ee490 | 330 | |
f4266e34 GKH |
331 | DPRINT_DBG(VMBUS, |
332 | "gpadl header - relid %d, range count %d, range buflen %d", | |
333 | Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen); | |
334 | for (i = 0; i < Gpadl->RangeCount; i++) { | |
3e7ee490 | 335 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
f4266e34 | 336 | pageCount = (pageCount > 26) ? 26 : pageCount; |
3e7ee490 | 337 | |
f4266e34 GKH |
338 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
339 | "page count %d", i, Gpadl->Range[i].ByteCount, | |
340 | Gpadl->Range[i].ByteOffset, pageCount); | |
3e7ee490 | 341 | |
f4266e34 GKH |
342 | for (j = 0; j < pageCount; j++) |
343 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, | |
344 | Gpadl->Range[i].PfnArray[j]); | |
3e7ee490 HJ |
345 | } |
346 | } | |
347 | ||
3e189519 | 348 | /* |
f4266e34 GKH |
349 | * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer |
350 | */ | |
351 | static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size, | |
352 | struct vmbus_channel_msginfo **MsgInfo, | |
353 | u32 *MessageCount) | |
3e7ee490 HJ |
354 | { |
355 | int i; | |
356 | int pageCount; | |
f4266e34 | 357 | unsigned long long pfn; |
82250213 GKH |
358 | struct vmbus_channel_gpadl_header *gpaHeader; |
359 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 GKH |
360 | struct vmbus_channel_msginfo *msgHeader; |
361 | struct vmbus_channel_msginfo *msgBody; | |
f4266e34 | 362 | u32 msgSize; |
3e7ee490 HJ |
363 | |
364 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
365 | ||
f4266e34 GKH |
366 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
367 | ASSERT((Size & (PAGE_SIZE-1)) == 0); | |
3e7ee490 HJ |
368 | |
369 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 370 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 371 | |
454f18a9 | 372 | /* do we need a gpadl body msg */ |
f4266e34 GKH |
373 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
374 | sizeof(struct vmbus_channel_gpadl_header) - | |
375 | sizeof(struct gpa_range); | |
59471438 | 376 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 377 | |
f4266e34 GKH |
378 | if (pageCount > pfnCount) { |
379 | /* we need a gpadl body */ | |
454f18a9 | 380 | /* fill in the header */ |
f4266e34 GKH |
381 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
382 | sizeof(struct vmbus_channel_gpadl_header) + | |
383 | sizeof(struct gpa_range) + pfnCount * sizeof(u64); | |
e276a3a5 | 384 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 | 385 | |
53af545b | 386 | INIT_LIST_HEAD(&msgHeader->SubMsgList); |
f4266e34 | 387 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 388 | |
82250213 | 389 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 390 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
391 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
392 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
393 | gpaHeader->Range[0].ByteOffset = 0; |
394 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 395 | for (i = 0; i < pfnCount; i++) |
3e7ee490 | 396 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
397 | *MsgInfo = msgHeader; |
398 | *MessageCount = 1; | |
399 | ||
400 | pfnSum = pfnCount; | |
401 | pfnLeft = pageCount - pfnCount; | |
402 | ||
454f18a9 | 403 | /* how many pfns can we fit */ |
f4266e34 GKH |
404 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
405 | sizeof(struct vmbus_channel_gpadl_body); | |
59471438 | 406 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 407 | |
454f18a9 | 408 | /* fill in the body */ |
f4266e34 | 409 | while (pfnLeft) { |
3e7ee490 | 410 | if (pfnLeft > pfnCount) |
3e7ee490 | 411 | pfnCurr = pfnCount; |
3e7ee490 | 412 | else |
3e7ee490 | 413 | pfnCurr = pfnLeft; |
3e7ee490 | 414 | |
f4266e34 GKH |
415 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
416 | sizeof(struct vmbus_channel_gpadl_body) + | |
417 | pfnCurr * sizeof(u64); | |
e276a3a5 | 418 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
419 | ASSERT(msgBody); |
420 | msgBody->MessageSize = msgSize; | |
421 | (*MessageCount)++; | |
f4266e34 GKH |
422 | gpadlBody = |
423 | (struct vmbus_channel_gpadl_body *)msgBody->Msg; | |
424 | ||
425 | /* | |
426 | * FIXME: | |
427 | * Gpadl is u32 and we are using a pointer which could | |
428 | * be 64-bit | |
429 | */ | |
454f18a9 | 430 | /* gpadlBody->Gpadl = kbuffer; */ |
f4266e34 | 431 | for (i = 0; i < pfnCurr; i++) |
3e7ee490 | 432 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
3e7ee490 | 433 | |
454f18a9 | 434 | /* add to msg header */ |
53af545b BP |
435 | list_add_tail(&msgBody->MsgListEntry, |
436 | &msgHeader->SubMsgList); | |
3e7ee490 HJ |
437 | pfnSum += pfnCurr; |
438 | pfnLeft -= pfnCurr; | |
439 | } | |
f4266e34 | 440 | } else { |
454f18a9 | 441 | /* everything fits in a header */ |
f4266e34 GKH |
442 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
443 | sizeof(struct vmbus_channel_gpadl_header) + | |
444 | sizeof(struct gpa_range) + pageCount * sizeof(u64); | |
e276a3a5 | 445 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
f4266e34 | 446 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 447 | |
82250213 | 448 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 449 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
450 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
451 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
452 | gpaHeader->Range[0].ByteOffset = 0; |
453 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 454 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 455 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
456 | |
457 | *MsgInfo = msgHeader; | |
458 | *MessageCount = 1; | |
459 | } | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
3e189519 | 464 | /* |
f4266e34 GKH |
465 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer |
466 | * | |
467 | * @Channel: a channel | |
468 | * @Kbuffer: from kmalloc | |
469 | * @Size: page-size multiple | |
470 | * @GpadlHandle: some funky thing | |
471 | */ | |
472 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
473 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 474 | { |
82250213 GKH |
475 | struct vmbus_channel_gpadl_header *gpadlMsg; |
476 | struct vmbus_channel_gpadl_body *gpadlBody; | |
477 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
c3bf2e26 | 478 | struct vmbus_channel_msginfo *msgInfo = NULL; |
aded7165 | 479 | struct vmbus_channel_msginfo *subMsgInfo; |
4d643114 | 480 | u32 msgCount; |
53af545b | 481 | struct list_head *curr; |
4d643114 | 482 | u32 nextGpadlHandle; |
dd0813b6 | 483 | unsigned long flags; |
c3bf2e26 | 484 | int ret = 0; |
3e7ee490 HJ |
485 | |
486 | DPRINT_ENTER(VMBUS); | |
487 | ||
f4888417 BP |
488 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
489 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 | 490 | |
c3bf2e26 BP |
491 | ret = VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); |
492 | if (ret) | |
493 | return ret; | |
3e7ee490 | 494 | |
bfc30aae | 495 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
496 | if (!msgInfo->WaitEvent) { |
497 | ret = -ENOMEM; | |
498 | goto Cleanup; | |
499 | } | |
500 | ||
82250213 | 501 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
502 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
503 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
504 | gpadlMsg->Gpadl = nextGpadlHandle; | |
505 | ||
506 | DumpGpadlHeader(gpadlMsg); | |
507 | ||
dd0813b6 | 508 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
509 | list_add_tail(&msgInfo->MsgListEntry, |
510 | &gVmbusConnection.ChannelMsgList); | |
3e7ee490 | 511 | |
53af545b | 512 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
513 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
514 | Kbuffer, Size, msgCount); | |
3e7ee490 | 515 | |
f4266e34 GKH |
516 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
517 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 518 | |
f4266e34 GKH |
519 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
520 | sizeof(*msgInfo)); | |
521 | if (ret != 0) { | |
3e7ee490 HJ |
522 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
523 | goto Cleanup; | |
524 | } | |
525 | ||
f4266e34 | 526 | if (msgCount > 1) { |
53af545b BP |
527 | list_for_each(curr, &msgInfo->SubMsgList) { |
528 | ||
529 | /* FIXME: should this use list_entry() instead ? */ | |
82250213 | 530 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
531 | gpadlBody = |
532 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
533 | |
534 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
535 | gpadlBody->Gpadl = nextGpadlHandle; | |
536 | ||
f4266e34 GKH |
537 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
538 | subMsgInfo->MessageSize - | |
539 | sizeof(*subMsgInfo)); | |
3e7ee490 | 540 | |
f4266e34 GKH |
541 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
542 | sizeof(*subMsgInfo)); | |
543 | ret = VmbusPostMessage(gpadlBody, | |
544 | subMsgInfo->MessageSize - | |
545 | sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
546 | ASSERT(ret == 0); |
547 | } | |
548 | } | |
bfc30aae | 549 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 550 | |
454f18a9 | 551 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
552 | DPRINT_DBG(VMBUS, "Received GPADL created " |
553 | "(relid %d, status %d handle %x)", | |
554 | Channel->OfferMsg.ChildRelId, | |
555 | msgInfo->Response.GpadlCreated.CreationStatus, | |
556 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
557 | |
558 | *GpadlHandle = gpadlMsg->Gpadl; | |
559 | ||
560 | Cleanup: | |
dd0813b6 | 561 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 562 | list_del(&msgInfo->MsgListEntry); |
dd0813b6 | 563 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 564 | |
420beac4 | 565 | kfree(msgInfo->WaitEvent); |
8c69f52a | 566 | kfree(msgInfo); |
3e7ee490 HJ |
567 | |
568 | DPRINT_EXIT(VMBUS); | |
569 | ||
570 | return ret; | |
571 | } | |
572 | ||
3e189519 | 573 | /* |
f4266e34 GKH |
574 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle |
575 | */ | |
aded7165 | 576 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 577 | { |
82250213 | 578 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 579 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 580 | unsigned long flags; |
f4266e34 | 581 | int ret; |
3e7ee490 HJ |
582 | |
583 | DPRINT_ENTER(VMBUS); | |
584 | ||
585 | ASSERT(GpadlHandle != 0); | |
586 | ||
f4266e34 GKH |
587 | info = kmalloc(sizeof(*info) + |
588 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
589 | if (!info) |
590 | return -ENOMEM; | |
3e7ee490 | 591 | |
bfc30aae | 592 | info->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
593 | if (!info->WaitEvent) { |
594 | kfree(info); | |
595 | return -ENOMEM; | |
596 | } | |
3e7ee490 | 597 | |
82250213 | 598 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
599 | |
600 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
601 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
602 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 603 | |
dd0813b6 | 604 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
605 | list_add_tail(&info->MsgListEntry, |
606 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 607 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 608 | |
f4266e34 GKH |
609 | ret = VmbusPostMessage(msg, |
610 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
611 | if (ret != 0) { | |
454f18a9 | 612 | /* TODO: */ |
f4266e34 | 613 | /* something... */ |
3e7ee490 HJ |
614 | } |
615 | ||
bfc30aae | 616 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 617 | |
454f18a9 | 618 | /* Received a torndown response */ |
dd0813b6 | 619 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 620 | list_del(&info->MsgListEntry); |
dd0813b6 | 621 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 622 | |
420beac4 | 623 | kfree(info->WaitEvent); |
8c69f52a | 624 | kfree(info); |
3e7ee490 HJ |
625 | |
626 | DPRINT_EXIT(VMBUS); | |
627 | ||
628 | return ret; | |
629 | } | |
630 | ||
3e189519 | 631 | /* |
f4266e34 GKH |
632 | * VmbusChannelClose - Close the specified channel |
633 | */ | |
aded7165 | 634 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 635 | { |
82250213 | 636 | struct vmbus_channel_close_channel *msg; |
aded7165 | 637 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 638 | unsigned long flags; |
f4266e34 | 639 | int ret; |
3e7ee490 HJ |
640 | |
641 | DPRINT_ENTER(VMBUS); | |
642 | ||
454f18a9 | 643 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 644 | Channel->OnChannelCallback = NULL; |
5996b3dd | 645 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 646 | |
454f18a9 | 647 | /* Send a closing message */ |
f4266e34 GKH |
648 | info = kmalloc(sizeof(*info) + |
649 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
650 | /* FIXME: can't do anything other than return here because the |
651 | * function is void */ | |
652 | if (!info) | |
653 | return; | |
3e7ee490 | 654 | |
bfc30aae | 655 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 656 | |
82250213 | 657 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
658 | msg->Header.MessageType = ChannelMessageCloseChannel; |
659 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 660 | |
82250213 | 661 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 662 | if (ret != 0) { |
454f18a9 | 663 | /* TODO: */ |
f4266e34 | 664 | /* something... */ |
3e7ee490 HJ |
665 | } |
666 | ||
454f18a9 | 667 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 668 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
669 | VmbusChannelTeardownGpadl(Channel, |
670 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 671 | |
454f18a9 | 672 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 673 | |
454f18a9 | 674 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
675 | RingBufferCleanup(&Channel->Outbound); |
676 | RingBufferCleanup(&Channel->Inbound); | |
677 | ||
bfc30aae | 678 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 679 | |
8c69f52a | 680 | kfree(info); |
3e7ee490 | 681 | |
454f18a9 BP |
682 | /* |
683 | * If we are closing the channel during an error path in | |
684 | * opening the channel, don't free the channel since the | |
685 | * caller will free the channel | |
686 | */ | |
687 | ||
f4266e34 | 688 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 689 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 690 | list_del(&Channel->ListEntry); |
0f5e44ca | 691 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
692 | |
693 | FreeVmbusChannel(Channel); | |
694 | } | |
695 | ||
696 | DPRINT_EXIT(VMBUS); | |
697 | } | |
698 | ||
c88c4e4c HJ |
699 | /** |
700 | * VmbusChannelSendPacket() - Send the specified buffer on the given channel | |
701 | * @Channel: Pointer to vmbus_channel structure. | |
702 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
703 | * @BufferLen: Maximum size of what the the buffer will hold | |
704 | * @RequestId: Identifier of the request | |
705 | * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time | |
706 | * packet etc. | |
707 | * | |
708 | * Sends data in @Buffer directly to hyper-v via the vmbus | |
709 | * This will send the data unparsed to hyper-v. | |
710 | * | |
711 | * Mainly used by Hyper-V drivers. | |
f4266e34 GKH |
712 | */ |
713 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
714 | u32 BufferLen, u64 RequestId, | |
715 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 716 | { |
8dc0a06a GKH |
717 | struct vmpacket_descriptor desc; |
718 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 719 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 720 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
721 | u64 alignedData = 0; |
722 | int ret; | |
3e7ee490 HJ |
723 | |
724 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
725 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
726 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
727 | |
728 | DumpVmbusChannel(Channel); | |
729 | ||
59471438 | 730 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 731 | |
454f18a9 BP |
732 | /* Setup the descriptor */ |
733 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
734 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
735 | /* in 8-bytes granularity */ |
736 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
737 | desc.Length8 = (u16)(packetLenAligned >> 3); |
738 | desc.TransactionId = RequestId; | |
3e7ee490 | 739 | |
f4266e34 | 740 | sg_init_table(bufferList, 3); |
8dc0a06a | 741 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
742 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
743 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 744 | |
f4266e34 | 745 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 746 | |
454f18a9 | 747 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 748 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 749 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
750 | |
751 | DPRINT_EXIT(VMBUS); | |
752 | ||
753 | return ret; | |
754 | } | |
c88c4e4c | 755 | EXPORT_SYMBOL(VmbusChannelSendPacket); |
3e7ee490 | 756 | |
3e189519 HJ |
757 | /* |
758 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer | |
759 | * packets using a GPADL Direct packet type. | |
f4266e34 | 760 | */ |
aded7165 | 761 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
762 | struct hv_page_buffer PageBuffers[], |
763 | u32 PageCount, void *Buffer, u32 BufferLen, | |
764 | u64 RequestId) | |
3e7ee490 | 765 | { |
f4266e34 GKH |
766 | int ret; |
767 | int i; | |
0cf4fa80 | 768 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
769 | u32 descSize; |
770 | u32 packetLen; | |
771 | u32 packetLenAligned; | |
b219b3f7 | 772 | struct scatterlist bufferList[3]; |
f4266e34 | 773 | u64 alignedData = 0; |
3e7ee490 HJ |
774 | |
775 | DPRINT_ENTER(VMBUS); | |
776 | ||
777 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
778 | ||
779 | DumpVmbusChannel(Channel); | |
780 | ||
f4266e34 GKH |
781 | /* |
782 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
783 | * largest size we support | |
784 | */ | |
785 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
786 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
787 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 788 | packetLen = descSize + BufferLen; |
59471438 | 789 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 790 | |
59471438 | 791 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 792 | |
454f18a9 | 793 | /* Setup the descriptor */ |
3e7ee490 HJ |
794 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
795 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
796 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
797 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
798 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
799 | desc.RangeCount = PageCount; |
800 | ||
f4266e34 | 801 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
802 | desc.Range[i].Length = PageBuffers[i].Length; |
803 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
804 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
805 | } | |
806 | ||
f4266e34 | 807 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
808 | sg_set_buf(&bufferList[0], &desc, descSize); |
809 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
810 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 811 | |
f4266e34 | 812 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 813 | |
454f18a9 | 814 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 815 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 816 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
817 | |
818 | DPRINT_EXIT(VMBUS); | |
819 | ||
820 | return ret; | |
821 | } | |
822 | ||
3e189519 HJ |
823 | /* |
824 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet | |
825 | * using a GPADL Direct packet type. | |
f4266e34 | 826 | */ |
aded7165 | 827 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
828 | struct hv_multipage_buffer *MultiPageBuffer, |
829 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 830 | { |
f4266e34 | 831 | int ret; |
3fcc523a | 832 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
833 | u32 descSize; |
834 | u32 packetLen; | |
835 | u32 packetLenAligned; | |
b219b3f7 | 836 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
837 | u64 alignedData = 0; |
838 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
839 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
840 | |
841 | DPRINT_ENTER(VMBUS); | |
842 | ||
843 | DumpVmbusChannel(Channel); | |
844 | ||
f4266e34 GKH |
845 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
846 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 HJ |
847 | |
848 | ASSERT(PfnCount > 0); | |
849 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
850 | ||
f4266e34 GKH |
851 | /* |
852 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
853 | * the largest size we support | |
854 | */ | |
855 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
856 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
857 | sizeof(u64)); | |
3e7ee490 | 858 | packetLen = descSize + BufferLen; |
59471438 | 859 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 860 | |
59471438 | 861 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 862 | |
454f18a9 | 863 | /* Setup the descriptor */ |
3e7ee490 HJ |
864 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
865 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
866 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
867 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
868 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
869 | desc.RangeCount = 1; |
870 | ||
871 | desc.Range.Length = MultiPageBuffer->Length; | |
872 | desc.Range.Offset = MultiPageBuffer->Offset; | |
873 | ||
f4266e34 GKH |
874 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
875 | PfnCount * sizeof(u64)); | |
3e7ee490 | 876 | |
f4266e34 | 877 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
878 | sg_set_buf(&bufferList[0], &desc, descSize); |
879 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
880 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 881 | |
f4266e34 | 882 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 883 | |
454f18a9 | 884 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 885 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 886 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
887 | |
888 | DPRINT_EXIT(VMBUS); | |
889 | ||
890 | return ret; | |
891 | } | |
892 | ||
c88c4e4c HJ |
893 | |
894 | /** | |
895 | * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel | |
896 | * @Channel: Pointer to vmbus_channel structure. | |
897 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
898 | * @BufferLen: Maximum size of what the the buffer will hold | |
899 | * @BufferActualLen: The actual size of the data after it was received | |
900 | * @RequestId: Identifier of the request | |
901 | * | |
902 | * Receives directly from the hyper-v vmbus and puts the data it received | |
903 | * into Buffer. This will receive the data unparsed from hyper-v. | |
904 | * | |
905 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 906 | */ |
f4266e34 GKH |
907 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
908 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 909 | { |
8dc0a06a | 910 | struct vmpacket_descriptor desc; |
4d643114 GKH |
911 | u32 packetLen; |
912 | u32 userLen; | |
3e7ee490 | 913 | int ret; |
54411c42 | 914 | unsigned long flags; |
3e7ee490 HJ |
915 | |
916 | DPRINT_ENTER(VMBUS); | |
917 | ||
918 | *BufferActualLen = 0; | |
919 | *RequestId = 0; | |
920 | ||
54411c42 | 921 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 922 | |
f4266e34 GKH |
923 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
924 | sizeof(struct vmpacket_descriptor)); | |
925 | if (ret != 0) { | |
54411c42 | 926 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 927 | |
454f18a9 | 928 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
929 | DPRINT_EXIT(VMBUS); |
930 | return 0; | |
931 | } | |
932 | ||
454f18a9 | 933 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
934 | |
935 | packetLen = desc.Length8 << 3; | |
936 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 937 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 938 | |
f4266e34 GKH |
939 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
940 | "flag %d tid %llx pktlen %d datalen %d> ", | |
941 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
942 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
943 | |
944 | *BufferActualLen = userLen; | |
945 | ||
f4266e34 | 946 | if (userLen > BufferLen) { |
54411c42 | 947 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 948 | |
f4266e34 GKH |
949 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
950 | BufferLen, userLen); | |
3e7ee490 HJ |
951 | DPRINT_EXIT(VMBUS); |
952 | ||
953 | return -1; | |
954 | } | |
955 | ||
956 | *RequestId = desc.TransactionId; | |
957 | ||
454f18a9 | 958 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
959 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
960 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 961 | |
54411c42 | 962 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
963 | |
964 | DPRINT_EXIT(VMBUS); | |
965 | ||
966 | return 0; | |
967 | } | |
c88c4e4c | 968 | EXPORT_SYMBOL(VmbusChannelRecvPacket); |
3e7ee490 | 969 | |
3e189519 | 970 | /* |
f4266e34 GKH |
971 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel |
972 | */ | |
973 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
974 | u32 BufferLen, u32 *BufferActualLen, | |
975 | u64 *RequestId) | |
3e7ee490 | 976 | { |
8dc0a06a | 977 | struct vmpacket_descriptor desc; |
4d643114 GKH |
978 | u32 packetLen; |
979 | u32 userLen; | |
3e7ee490 | 980 | int ret; |
54411c42 | 981 | unsigned long flags; |
3e7ee490 HJ |
982 | |
983 | DPRINT_ENTER(VMBUS); | |
984 | ||
985 | *BufferActualLen = 0; | |
986 | *RequestId = 0; | |
987 | ||
54411c42 | 988 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 989 | |
f4266e34 GKH |
990 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
991 | sizeof(struct vmpacket_descriptor)); | |
992 | if (ret != 0) { | |
54411c42 | 993 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 994 | |
454f18a9 | 995 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
996 | DPRINT_EXIT(VMBUS); |
997 | return 0; | |
998 | } | |
999 | ||
454f18a9 | 1000 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
1001 | |
1002 | packetLen = desc.Length8 << 3; | |
1003 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1004 | ||
f4266e34 GKH |
1005 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
1006 | "flag %d tid %llx pktlen %d datalen %d> ", | |
1007 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
1008 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
1009 | |
1010 | *BufferActualLen = packetLen; | |
1011 | ||
f4266e34 | 1012 | if (packetLen > BufferLen) { |
54411c42 | 1013 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1014 | |
f4266e34 GKH |
1015 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
1016 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
1017 | DPRINT_EXIT(VMBUS); |
1018 | return -2; | |
1019 | } | |
1020 | ||
1021 | *RequestId = desc.TransactionId; | |
1022 | ||
454f18a9 | 1023 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
1024 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
1025 | ||
54411c42 | 1026 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1027 | |
1028 | DPRINT_EXIT(VMBUS); | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
3e189519 | 1033 | /* |
f4266e34 GKH |
1034 | * VmbusChannelOnChannelEvent - Channel event callback |
1035 | */ | |
aded7165 | 1036 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1037 | { |
1038 | DumpVmbusChannel(Channel); | |
1039 | ASSERT(Channel->OnChannelCallback); | |
5996b3dd | 1040 | |
3e7ee490 | 1041 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
5996b3dd HZ |
1042 | |
1043 | mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100)); | |
3e7ee490 HJ |
1044 | } |
1045 | ||
3e189519 | 1046 | /* |
f4266e34 GKH |
1047 | * VmbusChannelOnTimer - Timer event callback |
1048 | */ | |
46a05253 | 1049 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1050 | { |
aded7165 | 1051 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1052 | |
0fa37b1e | 1053 | if (channel->OnChannelCallback) |
3e7ee490 | 1054 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
1055 | } |
1056 | ||
3e189519 | 1057 | /* |
f4266e34 GKH |
1058 | * DumpVmbusChannel - Dump vmbus channel info to the console |
1059 | */ | |
aded7165 | 1060 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1061 | { |
1062 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1063 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1064 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1065 | } |