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" |
72daf320 | 27 | #include "vmbus_private.h" |
3e7ee490 | 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; |
b94ef345 | 178 | struct vmbus_channel_msginfo *openInfo = NULL; |
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 */ |
0ace247e BP |
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 | ||
0ace247e | 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 | 205 | |
3324fb40 | 206 | ret = RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); |
fd4dc88e | 207 | if (ret != 0) { |
3324fb40 BP |
208 | err = ret; |
209 | goto errorout; | |
210 | } | |
211 | ||
212 | ret = RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
fd4dc88e | 213 | if (ret != 0) { |
3324fb40 BP |
214 | err = ret; |
215 | goto errorout; | |
216 | } | |
3e7ee490 | 217 | |
3e7ee490 | 218 | |
454f18a9 | 219 | /* Establish the gpadl for the ring buffer */ |
f4266e34 GKH |
220 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
221 | NewChannel); | |
3e7ee490 HJ |
222 | |
223 | NewChannel->RingBufferGpadlHandle = 0; | |
224 | ||
225 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
f4266e34 GKH |
226 | NewChannel->Outbound.RingBuffer, |
227 | SendRingBufferSize + | |
228 | RecvRingBufferSize, | |
229 | &NewChannel->RingBufferGpadlHandle); | |
b94ef345 | 230 | |
fd4dc88e | 231 | if (ret != 0) { |
b94ef345 BP |
232 | err = ret; |
233 | goto errorout; | |
234 | } | |
f4266e34 GKH |
235 | |
236 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
237 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
238 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
239 | NewChannel->RingBufferGpadlHandle, | |
240 | NewChannel->Outbound.RingBuffer, | |
241 | NewChannel->Outbound.RingSize, | |
242 | NewChannel->Inbound.RingBuffer, | |
243 | NewChannel->Inbound.RingSize, | |
244 | SendRingBufferSize); | |
3e7ee490 | 245 | |
454f18a9 | 246 | /* Create and init the channel open message */ |
f4266e34 GKH |
247 | openInfo = kmalloc(sizeof(*openInfo) + |
248 | sizeof(struct vmbus_channel_open_channel), | |
249 | GFP_KERNEL); | |
c3bf2e26 BP |
250 | if (!openInfo) { |
251 | err = -ENOMEM; | |
252 | goto errorout; | |
253 | } | |
3e7ee490 | 254 | |
bfc30aae | 255 | openInfo->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
256 | if (!openInfo->WaitEvent) { |
257 | err = -ENOMEM; | |
258 | goto errorout; | |
259 | } | |
3e7ee490 | 260 | |
82250213 | 261 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
262 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
263 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
264 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
265 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
f4266e34 GKH |
266 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> |
267 | PAGE_SHIFT; | |
268 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 | 269 | |
c827f944 BP |
270 | if (UserDataLen > MAX_USER_DEFINED_BYTES) { |
271 | err = -EINVAL; | |
272 | goto errorout; | |
273 | } | |
274 | ||
3e7ee490 | 275 | if (UserDataLen) |
3e7ee490 | 276 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 277 | |
dd0813b6 | 278 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
279 | list_add_tail(&openInfo->MsgListEntry, |
280 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 281 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
282 | |
283 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
284 | ||
f4266e34 GKH |
285 | ret = VmbusPostMessage(openMsg, |
286 | sizeof(struct vmbus_channel_open_channel)); | |
287 | if (ret != 0) { | |
3e7ee490 HJ |
288 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
289 | goto Cleanup; | |
290 | } | |
291 | ||
454f18a9 | 292 | /* FIXME: Need to time-out here */ |
bfc30aae | 293 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
294 | |
295 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 296 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 297 | else |
f4266e34 GKH |
298 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
299 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
300 | |
301 | Cleanup: | |
dd0813b6 | 302 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 303 | list_del(&openInfo->MsgListEntry); |
dd0813b6 | 304 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 305 | |
420beac4 | 306 | kfree(openInfo->WaitEvent); |
8c69f52a | 307 | kfree(openInfo); |
3e7ee490 HJ |
308 | |
309 | DPRINT_EXIT(VMBUS); | |
310 | ||
311 | return 0; | |
c3bf2e26 BP |
312 | |
313 | errorout: | |
b94ef345 BP |
314 | RingBufferCleanup(&NewChannel->Outbound); |
315 | RingBufferCleanup(&NewChannel->Inbound); | |
c3bf2e26 BP |
316 | osd_PageFree(out, (SendRingBufferSize + RecvRingBufferSize) |
317 | >> PAGE_SHIFT); | |
318 | kfree(openInfo); | |
319 | return err; | |
3e7ee490 HJ |
320 | } |
321 | ||
3e189519 HJ |
322 | /* |
323 | * DumpGpadlBody - Dump the gpadl body message to the console for | |
324 | * debugging purposes. | |
f4266e34 | 325 | */ |
82250213 | 326 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 | 327 | { |
f4266e34 GKH |
328 | int i; |
329 | int pfnCount; | |
3e7ee490 | 330 | |
f4266e34 GKH |
331 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) / |
332 | sizeof(u64); | |
3e7ee490 HJ |
333 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
334 | ||
f4266e34 GKH |
335 | for (i = 0; i < pfnCount; i++) |
336 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", | |
337 | i, Gpadl->Pfn[i]); | |
3e7ee490 HJ |
338 | } |
339 | ||
3e189519 HJ |
340 | /* |
341 | * DumpGpadlHeader - Dump the gpadl header message to the console for | |
342 | * debugging purposes. | |
f4266e34 | 343 | */ |
82250213 | 344 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 | 345 | { |
f4266e34 GKH |
346 | int i, j; |
347 | int pageCount; | |
3e7ee490 | 348 | |
f4266e34 GKH |
349 | DPRINT_DBG(VMBUS, |
350 | "gpadl header - relid %d, range count %d, range buflen %d", | |
351 | Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen); | |
352 | for (i = 0; i < Gpadl->RangeCount; i++) { | |
3e7ee490 | 353 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
f4266e34 | 354 | pageCount = (pageCount > 26) ? 26 : pageCount; |
3e7ee490 | 355 | |
f4266e34 GKH |
356 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
357 | "page count %d", i, Gpadl->Range[i].ByteCount, | |
358 | Gpadl->Range[i].ByteOffset, pageCount); | |
3e7ee490 | 359 | |
f4266e34 GKH |
360 | for (j = 0; j < pageCount; j++) |
361 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, | |
362 | Gpadl->Range[i].PfnArray[j]); | |
3e7ee490 HJ |
363 | } |
364 | } | |
365 | ||
3e189519 | 366 | /* |
f4266e34 GKH |
367 | * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer |
368 | */ | |
369 | static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size, | |
370 | struct vmbus_channel_msginfo **MsgInfo, | |
371 | u32 *MessageCount) | |
3e7ee490 HJ |
372 | { |
373 | int i; | |
374 | int pageCount; | |
f4266e34 | 375 | unsigned long long pfn; |
82250213 GKH |
376 | struct vmbus_channel_gpadl_header *gpaHeader; |
377 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 | 378 | struct vmbus_channel_msginfo *msgHeader; |
e61fbe66 | 379 | struct vmbus_channel_msginfo *msgBody = NULL; |
f4266e34 | 380 | u32 msgSize; |
3e7ee490 HJ |
381 | |
382 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
383 | ||
f4266e34 | 384 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
0ace247e | 385 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 HJ |
386 | |
387 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 388 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 389 | |
454f18a9 | 390 | /* do we need a gpadl body msg */ |
f4266e34 GKH |
391 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
392 | sizeof(struct vmbus_channel_gpadl_header) - | |
393 | sizeof(struct gpa_range); | |
59471438 | 394 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 395 | |
f4266e34 GKH |
396 | if (pageCount > pfnCount) { |
397 | /* we need a gpadl body */ | |
454f18a9 | 398 | /* fill in the header */ |
f4266e34 GKH |
399 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
400 | sizeof(struct vmbus_channel_gpadl_header) + | |
401 | sizeof(struct gpa_range) + pfnCount * sizeof(u64); | |
e276a3a5 | 402 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
d1c250bb BP |
403 | if (!msgHeader) |
404 | goto nomem; | |
3e7ee490 | 405 | |
53af545b | 406 | INIT_LIST_HEAD(&msgHeader->SubMsgList); |
f4266e34 | 407 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 408 | |
82250213 | 409 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 410 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
411 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
412 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
413 | gpaHeader->Range[0].ByteOffset = 0; |
414 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 415 | for (i = 0; i < pfnCount; i++) |
3e7ee490 | 416 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
417 | *MsgInfo = msgHeader; |
418 | *MessageCount = 1; | |
419 | ||
420 | pfnSum = pfnCount; | |
421 | pfnLeft = pageCount - pfnCount; | |
422 | ||
454f18a9 | 423 | /* how many pfns can we fit */ |
f4266e34 GKH |
424 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
425 | sizeof(struct vmbus_channel_gpadl_body); | |
59471438 | 426 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 427 | |
454f18a9 | 428 | /* fill in the body */ |
f4266e34 | 429 | while (pfnLeft) { |
3e7ee490 | 430 | if (pfnLeft > pfnCount) |
3e7ee490 | 431 | pfnCurr = pfnCount; |
3e7ee490 | 432 | else |
3e7ee490 | 433 | pfnCurr = pfnLeft; |
3e7ee490 | 434 | |
f4266e34 GKH |
435 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
436 | sizeof(struct vmbus_channel_gpadl_body) + | |
437 | pfnCurr * sizeof(u64); | |
e276a3a5 | 438 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
d1c250bb BP |
439 | /* FIXME: we probably need to more if this fails */ |
440 | if (!msgBody) | |
441 | goto nomem; | |
3e7ee490 HJ |
442 | msgBody->MessageSize = msgSize; |
443 | (*MessageCount)++; | |
f4266e34 GKH |
444 | gpadlBody = |
445 | (struct vmbus_channel_gpadl_body *)msgBody->Msg; | |
446 | ||
447 | /* | |
448 | * FIXME: | |
449 | * Gpadl is u32 and we are using a pointer which could | |
450 | * be 64-bit | |
451 | */ | |
454f18a9 | 452 | /* gpadlBody->Gpadl = kbuffer; */ |
f4266e34 | 453 | for (i = 0; i < pfnCurr; i++) |
3e7ee490 | 454 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
3e7ee490 | 455 | |
454f18a9 | 456 | /* add to msg header */ |
53af545b BP |
457 | list_add_tail(&msgBody->MsgListEntry, |
458 | &msgHeader->SubMsgList); | |
3e7ee490 HJ |
459 | pfnSum += pfnCurr; |
460 | pfnLeft -= pfnCurr; | |
461 | } | |
f4266e34 | 462 | } else { |
454f18a9 | 463 | /* everything fits in a header */ |
f4266e34 GKH |
464 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
465 | sizeof(struct vmbus_channel_gpadl_header) + | |
466 | sizeof(struct gpa_range) + pageCount * sizeof(u64); | |
e276a3a5 | 467 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
f4266e34 | 468 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 469 | |
82250213 | 470 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 471 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
472 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
473 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
474 | gpaHeader->Range[0].ByteOffset = 0; |
475 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 476 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 477 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
478 | |
479 | *MsgInfo = msgHeader; | |
480 | *MessageCount = 1; | |
481 | } | |
482 | ||
483 | return 0; | |
d1c250bb BP |
484 | nomem: |
485 | kfree(msgHeader); | |
486 | kfree(msgBody); | |
487 | return -ENOMEM; | |
3e7ee490 HJ |
488 | } |
489 | ||
3e189519 | 490 | /* |
f4266e34 GKH |
491 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer |
492 | * | |
493 | * @Channel: a channel | |
494 | * @Kbuffer: from kmalloc | |
495 | * @Size: page-size multiple | |
496 | * @GpadlHandle: some funky thing | |
497 | */ | |
498 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
499 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 500 | { |
82250213 GKH |
501 | struct vmbus_channel_gpadl_header *gpadlMsg; |
502 | struct vmbus_channel_gpadl_body *gpadlBody; | |
503 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
c3bf2e26 | 504 | struct vmbus_channel_msginfo *msgInfo = NULL; |
aded7165 | 505 | struct vmbus_channel_msginfo *subMsgInfo; |
4d643114 | 506 | u32 msgCount; |
53af545b | 507 | struct list_head *curr; |
4d643114 | 508 | u32 nextGpadlHandle; |
dd0813b6 | 509 | unsigned long flags; |
c3bf2e26 | 510 | int ret = 0; |
3e7ee490 HJ |
511 | |
512 | DPRINT_ENTER(VMBUS); | |
513 | ||
f4888417 BP |
514 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
515 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 | 516 | |
c3bf2e26 BP |
517 | ret = VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); |
518 | if (ret) | |
519 | return ret; | |
3e7ee490 | 520 | |
bfc30aae | 521 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
522 | if (!msgInfo->WaitEvent) { |
523 | ret = -ENOMEM; | |
524 | goto Cleanup; | |
525 | } | |
526 | ||
82250213 | 527 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
528 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
529 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
530 | gpadlMsg->Gpadl = nextGpadlHandle; | |
531 | ||
532 | DumpGpadlHeader(gpadlMsg); | |
533 | ||
dd0813b6 | 534 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
535 | list_add_tail(&msgInfo->MsgListEntry, |
536 | &gVmbusConnection.ChannelMsgList); | |
3e7ee490 | 537 | |
53af545b | 538 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
539 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
540 | Kbuffer, Size, msgCount); | |
3e7ee490 | 541 | |
f4266e34 GKH |
542 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
543 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 544 | |
f4266e34 GKH |
545 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
546 | sizeof(*msgInfo)); | |
547 | if (ret != 0) { | |
3e7ee490 HJ |
548 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
549 | goto Cleanup; | |
550 | } | |
551 | ||
f4266e34 | 552 | if (msgCount > 1) { |
53af545b BP |
553 | list_for_each(curr, &msgInfo->SubMsgList) { |
554 | ||
555 | /* FIXME: should this use list_entry() instead ? */ | |
82250213 | 556 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
557 | gpadlBody = |
558 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
559 | |
560 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
561 | gpadlBody->Gpadl = nextGpadlHandle; | |
562 | ||
f4266e34 GKH |
563 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
564 | subMsgInfo->MessageSize - | |
565 | sizeof(*subMsgInfo)); | |
3e7ee490 | 566 | |
f4266e34 GKH |
567 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
568 | sizeof(*subMsgInfo)); | |
569 | ret = VmbusPostMessage(gpadlBody, | |
570 | subMsgInfo->MessageSize - | |
571 | sizeof(*subMsgInfo)); | |
fd4dc88e | 572 | if (ret != 0) |
99259159 BP |
573 | goto Cleanup; |
574 | ||
3e7ee490 HJ |
575 | } |
576 | } | |
bfc30aae | 577 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 578 | |
454f18a9 | 579 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
580 | DPRINT_DBG(VMBUS, "Received GPADL created " |
581 | "(relid %d, status %d handle %x)", | |
582 | Channel->OfferMsg.ChildRelId, | |
583 | msgInfo->Response.GpadlCreated.CreationStatus, | |
584 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
585 | |
586 | *GpadlHandle = gpadlMsg->Gpadl; | |
587 | ||
588 | Cleanup: | |
dd0813b6 | 589 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 590 | list_del(&msgInfo->MsgListEntry); |
dd0813b6 | 591 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 592 | |
420beac4 | 593 | kfree(msgInfo->WaitEvent); |
8c69f52a | 594 | kfree(msgInfo); |
3e7ee490 HJ |
595 | |
596 | DPRINT_EXIT(VMBUS); | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
3e189519 | 601 | /* |
f4266e34 GKH |
602 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle |
603 | */ | |
aded7165 | 604 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 605 | { |
82250213 | 606 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 607 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 608 | unsigned long flags; |
f4266e34 | 609 | int ret; |
3e7ee490 HJ |
610 | |
611 | DPRINT_ENTER(VMBUS); | |
612 | ||
0ace247e | 613 | /* ASSERT(GpadlHandle != 0); */ |
3e7ee490 | 614 | |
f4266e34 GKH |
615 | info = kmalloc(sizeof(*info) + |
616 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
617 | if (!info) |
618 | return -ENOMEM; | |
3e7ee490 | 619 | |
bfc30aae | 620 | info->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
621 | if (!info->WaitEvent) { |
622 | kfree(info); | |
623 | return -ENOMEM; | |
624 | } | |
3e7ee490 | 625 | |
82250213 | 626 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
627 | |
628 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
629 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
630 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 631 | |
dd0813b6 | 632 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
633 | list_add_tail(&info->MsgListEntry, |
634 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 635 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 636 | |
f4266e34 GKH |
637 | ret = VmbusPostMessage(msg, |
638 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
639 | if (ret != 0) { | |
454f18a9 | 640 | /* TODO: */ |
f4266e34 | 641 | /* something... */ |
3e7ee490 HJ |
642 | } |
643 | ||
bfc30aae | 644 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 645 | |
454f18a9 | 646 | /* Received a torndown response */ |
dd0813b6 | 647 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 648 | list_del(&info->MsgListEntry); |
dd0813b6 | 649 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 650 | |
420beac4 | 651 | kfree(info->WaitEvent); |
8c69f52a | 652 | kfree(info); |
3e7ee490 HJ |
653 | |
654 | DPRINT_EXIT(VMBUS); | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
3e189519 | 659 | /* |
f4266e34 GKH |
660 | * VmbusChannelClose - Close the specified channel |
661 | */ | |
aded7165 | 662 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 663 | { |
82250213 | 664 | struct vmbus_channel_close_channel *msg; |
aded7165 | 665 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 666 | unsigned long flags; |
f4266e34 | 667 | int ret; |
3e7ee490 HJ |
668 | |
669 | DPRINT_ENTER(VMBUS); | |
670 | ||
454f18a9 | 671 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 672 | Channel->OnChannelCallback = NULL; |
5996b3dd | 673 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 674 | |
454f18a9 | 675 | /* Send a closing message */ |
f4266e34 GKH |
676 | info = kmalloc(sizeof(*info) + |
677 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
678 | /* FIXME: can't do anything other than return here because the |
679 | * function is void */ | |
680 | if (!info) | |
681 | return; | |
3e7ee490 | 682 | |
bfc30aae | 683 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 684 | |
82250213 | 685 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
686 | msg->Header.MessageType = ChannelMessageCloseChannel; |
687 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 688 | |
82250213 | 689 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 690 | if (ret != 0) { |
454f18a9 | 691 | /* TODO: */ |
f4266e34 | 692 | /* something... */ |
3e7ee490 HJ |
693 | } |
694 | ||
454f18a9 | 695 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 696 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
697 | VmbusChannelTeardownGpadl(Channel, |
698 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 699 | |
454f18a9 | 700 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 701 | |
454f18a9 | 702 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
703 | RingBufferCleanup(&Channel->Outbound); |
704 | RingBufferCleanup(&Channel->Inbound); | |
705 | ||
bfc30aae | 706 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 707 | |
8c69f52a | 708 | kfree(info); |
3e7ee490 | 709 | |
454f18a9 BP |
710 | /* |
711 | * If we are closing the channel during an error path in | |
712 | * opening the channel, don't free the channel since the | |
713 | * caller will free the channel | |
714 | */ | |
715 | ||
f4266e34 | 716 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 717 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 718 | list_del(&Channel->ListEntry); |
0f5e44ca | 719 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
720 | |
721 | FreeVmbusChannel(Channel); | |
722 | } | |
723 | ||
724 | DPRINT_EXIT(VMBUS); | |
725 | } | |
726 | ||
c88c4e4c HJ |
727 | /** |
728 | * VmbusChannelSendPacket() - Send the specified buffer on the given channel | |
729 | * @Channel: Pointer to vmbus_channel structure. | |
730 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
731 | * @BufferLen: Maximum size of what the the buffer will hold | |
732 | * @RequestId: Identifier of the request | |
733 | * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time | |
734 | * packet etc. | |
735 | * | |
736 | * Sends data in @Buffer directly to hyper-v via the vmbus | |
737 | * This will send the data unparsed to hyper-v. | |
738 | * | |
739 | * Mainly used by Hyper-V drivers. | |
f4266e34 GKH |
740 | */ |
741 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
742 | u32 BufferLen, u64 RequestId, | |
743 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 744 | { |
8dc0a06a GKH |
745 | struct vmpacket_descriptor desc; |
746 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 747 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 748 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
749 | u64 alignedData = 0; |
750 | int ret; | |
3e7ee490 HJ |
751 | |
752 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
753 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
754 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
755 | |
756 | DumpVmbusChannel(Channel); | |
757 | ||
0ace247e | 758 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 759 | |
454f18a9 BP |
760 | /* Setup the descriptor */ |
761 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
762 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
763 | /* in 8-bytes granularity */ |
764 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
765 | desc.Length8 = (u16)(packetLenAligned >> 3); |
766 | desc.TransactionId = RequestId; | |
3e7ee490 | 767 | |
f4266e34 | 768 | sg_init_table(bufferList, 3); |
8dc0a06a | 769 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
770 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
771 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 772 | |
f4266e34 | 773 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 774 | |
454f18a9 | 775 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 776 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 777 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
778 | |
779 | DPRINT_EXIT(VMBUS); | |
780 | ||
781 | return ret; | |
782 | } | |
c88c4e4c | 783 | EXPORT_SYMBOL(VmbusChannelSendPacket); |
3e7ee490 | 784 | |
3e189519 HJ |
785 | /* |
786 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer | |
787 | * packets using a GPADL Direct packet type. | |
f4266e34 | 788 | */ |
aded7165 | 789 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
790 | struct hv_page_buffer PageBuffers[], |
791 | u32 PageCount, void *Buffer, u32 BufferLen, | |
792 | u64 RequestId) | |
3e7ee490 | 793 | { |
f4266e34 GKH |
794 | int ret; |
795 | int i; | |
0cf4fa80 | 796 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
797 | u32 descSize; |
798 | u32 packetLen; | |
799 | u32 packetLenAligned; | |
b219b3f7 | 800 | struct scatterlist bufferList[3]; |
f4266e34 | 801 | u64 alignedData = 0; |
3e7ee490 HJ |
802 | |
803 | DPRINT_ENTER(VMBUS); | |
804 | ||
002b53ea BP |
805 | if (PageCount > MAX_PAGE_BUFFER_COUNT) |
806 | return -EINVAL; | |
3e7ee490 HJ |
807 | |
808 | DumpVmbusChannel(Channel); | |
809 | ||
f4266e34 GKH |
810 | /* |
811 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
812 | * largest size we support | |
813 | */ | |
814 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
815 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
816 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 817 | packetLen = descSize + BufferLen; |
59471438 | 818 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 819 | |
0ace247e | 820 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 821 | |
454f18a9 | 822 | /* Setup the descriptor */ |
3e7ee490 HJ |
823 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
824 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
825 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
826 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
827 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
828 | desc.RangeCount = PageCount; |
829 | ||
f4266e34 | 830 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
831 | desc.Range[i].Length = PageBuffers[i].Length; |
832 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
833 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
834 | } | |
835 | ||
f4266e34 | 836 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
837 | sg_set_buf(&bufferList[0], &desc, descSize); |
838 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
839 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 840 | |
f4266e34 | 841 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 842 | |
454f18a9 | 843 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 844 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 845 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
846 | |
847 | DPRINT_EXIT(VMBUS); | |
848 | ||
849 | return ret; | |
850 | } | |
851 | ||
3e189519 HJ |
852 | /* |
853 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet | |
854 | * using a GPADL Direct packet type. | |
f4266e34 | 855 | */ |
aded7165 | 856 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
857 | struct hv_multipage_buffer *MultiPageBuffer, |
858 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 859 | { |
f4266e34 | 860 | int ret; |
3fcc523a | 861 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
862 | u32 descSize; |
863 | u32 packetLen; | |
864 | u32 packetLenAligned; | |
b219b3f7 | 865 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
866 | u64 alignedData = 0; |
867 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
868 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
869 | |
870 | DPRINT_ENTER(VMBUS); | |
871 | ||
872 | DumpVmbusChannel(Channel); | |
873 | ||
f4266e34 GKH |
874 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
875 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 | 876 | |
002b53ea BP |
877 | if ((PfnCount < 0) || (PfnCount > MAX_MULTIPAGE_BUFFER_COUNT)) |
878 | return -EINVAL; | |
3e7ee490 | 879 | |
f4266e34 GKH |
880 | /* |
881 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
882 | * the largest size we support | |
883 | */ | |
884 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
885 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
886 | sizeof(u64)); | |
3e7ee490 | 887 | packetLen = descSize + BufferLen; |
59471438 | 888 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 889 | |
0ace247e | 890 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 891 | |
454f18a9 | 892 | /* Setup the descriptor */ |
3e7ee490 HJ |
893 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
894 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
895 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
896 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
897 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
898 | desc.RangeCount = 1; |
899 | ||
900 | desc.Range.Length = MultiPageBuffer->Length; | |
901 | desc.Range.Offset = MultiPageBuffer->Offset; | |
902 | ||
f4266e34 GKH |
903 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
904 | PfnCount * sizeof(u64)); | |
3e7ee490 | 905 | |
f4266e34 | 906 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
907 | sg_set_buf(&bufferList[0], &desc, descSize); |
908 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
909 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 910 | |
f4266e34 | 911 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 912 | |
454f18a9 | 913 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 914 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 915 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
916 | |
917 | DPRINT_EXIT(VMBUS); | |
918 | ||
919 | return ret; | |
920 | } | |
921 | ||
c88c4e4c HJ |
922 | |
923 | /** | |
924 | * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel | |
925 | * @Channel: Pointer to vmbus_channel structure. | |
926 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
927 | * @BufferLen: Maximum size of what the the buffer will hold | |
928 | * @BufferActualLen: The actual size of the data after it was received | |
929 | * @RequestId: Identifier of the request | |
930 | * | |
931 | * Receives directly from the hyper-v vmbus and puts the data it received | |
932 | * into Buffer. This will receive the data unparsed from hyper-v. | |
933 | * | |
934 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 935 | */ |
f4266e34 GKH |
936 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
937 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 938 | { |
8dc0a06a | 939 | struct vmpacket_descriptor desc; |
4d643114 GKH |
940 | u32 packetLen; |
941 | u32 userLen; | |
3e7ee490 | 942 | int ret; |
54411c42 | 943 | unsigned long flags; |
3e7ee490 HJ |
944 | |
945 | DPRINT_ENTER(VMBUS); | |
946 | ||
947 | *BufferActualLen = 0; | |
948 | *RequestId = 0; | |
949 | ||
54411c42 | 950 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 951 | |
f4266e34 GKH |
952 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
953 | sizeof(struct vmpacket_descriptor)); | |
954 | if (ret != 0) { | |
54411c42 | 955 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 956 | |
454f18a9 | 957 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
958 | DPRINT_EXIT(VMBUS); |
959 | return 0; | |
960 | } | |
961 | ||
454f18a9 | 962 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
963 | |
964 | packetLen = desc.Length8 << 3; | |
965 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 966 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 967 | |
f4266e34 GKH |
968 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
969 | "flag %d tid %llx pktlen %d datalen %d> ", | |
970 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
971 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
972 | |
973 | *BufferActualLen = userLen; | |
974 | ||
f4266e34 | 975 | if (userLen > BufferLen) { |
54411c42 | 976 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 977 | |
f4266e34 GKH |
978 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
979 | BufferLen, userLen); | |
3e7ee490 HJ |
980 | DPRINT_EXIT(VMBUS); |
981 | ||
982 | return -1; | |
983 | } | |
984 | ||
985 | *RequestId = desc.TransactionId; | |
986 | ||
454f18a9 | 987 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
988 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
989 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 990 | |
54411c42 | 991 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
992 | |
993 | DPRINT_EXIT(VMBUS); | |
994 | ||
995 | return 0; | |
996 | } | |
c88c4e4c | 997 | EXPORT_SYMBOL(VmbusChannelRecvPacket); |
3e7ee490 | 998 | |
3e189519 | 999 | /* |
f4266e34 GKH |
1000 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel |
1001 | */ | |
1002 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
1003 | u32 BufferLen, u32 *BufferActualLen, | |
1004 | u64 *RequestId) | |
3e7ee490 | 1005 | { |
8dc0a06a | 1006 | struct vmpacket_descriptor desc; |
4d643114 GKH |
1007 | u32 packetLen; |
1008 | u32 userLen; | |
3e7ee490 | 1009 | int ret; |
54411c42 | 1010 | unsigned long flags; |
3e7ee490 HJ |
1011 | |
1012 | DPRINT_ENTER(VMBUS); | |
1013 | ||
1014 | *BufferActualLen = 0; | |
1015 | *RequestId = 0; | |
1016 | ||
54411c42 | 1017 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 1018 | |
f4266e34 GKH |
1019 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
1020 | sizeof(struct vmpacket_descriptor)); | |
1021 | if (ret != 0) { | |
54411c42 | 1022 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1023 | |
454f18a9 | 1024 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
1025 | DPRINT_EXIT(VMBUS); |
1026 | return 0; | |
1027 | } | |
1028 | ||
454f18a9 | 1029 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
1030 | |
1031 | packetLen = desc.Length8 << 3; | |
1032 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1033 | ||
f4266e34 GKH |
1034 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
1035 | "flag %d tid %llx pktlen %d datalen %d> ", | |
1036 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
1037 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
1038 | |
1039 | *BufferActualLen = packetLen; | |
1040 | ||
f4266e34 | 1041 | if (packetLen > BufferLen) { |
54411c42 | 1042 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1043 | |
f4266e34 GKH |
1044 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
1045 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
1046 | DPRINT_EXIT(VMBUS); |
1047 | return -2; | |
1048 | } | |
1049 | ||
1050 | *RequestId = desc.TransactionId; | |
1051 | ||
454f18a9 | 1052 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
1053 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
1054 | ||
54411c42 | 1055 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1056 | |
1057 | DPRINT_EXIT(VMBUS); | |
1058 | ||
1059 | return 0; | |
1060 | } | |
1061 | ||
3e189519 | 1062 | /* |
f4266e34 GKH |
1063 | * VmbusChannelOnChannelEvent - Channel event callback |
1064 | */ | |
aded7165 | 1065 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1066 | { |
1067 | DumpVmbusChannel(Channel); | |
0ace247e | 1068 | /* ASSERT(Channel->OnChannelCallback); */ |
5996b3dd | 1069 | |
3e7ee490 | 1070 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
5996b3dd HZ |
1071 | |
1072 | mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100)); | |
3e7ee490 HJ |
1073 | } |
1074 | ||
3e189519 | 1075 | /* |
f4266e34 GKH |
1076 | * VmbusChannelOnTimer - Timer event callback |
1077 | */ | |
46a05253 | 1078 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1079 | { |
aded7165 | 1080 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1081 | |
0fa37b1e | 1082 | if (channel->OnChannelCallback) |
3e7ee490 | 1083 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
1084 | } |
1085 | ||
3e189519 | 1086 | /* |
f4266e34 GKH |
1087 | * DumpVmbusChannel - Dump vmbus channel info to the console |
1088 | */ | |
aded7165 | 1089 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1090 | { |
1091 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1092 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1093 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1094 | } |