Commit | Line | Data |
---|---|---|
3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
a0086dc5 | 22 | #include <linux/mm.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
c88c4e4c | 24 | #include <linux/module.h> |
4983b39a | 25 | #include "osd.h" |
645954c5 | 26 | #include "logging.h" |
3e7ee490 HJ |
27 | #include "VmbusPrivate.h" |
28 | ||
454f18a9 | 29 | /* Internal routines */ |
aded7165 | 30 | static int VmbusChannelCreateGpadlHeader( |
f4266e34 GKH |
31 | void *Kbuffer, /* must be phys and virt contiguous */ |
32 | u32 Size, /* page-size multiple */ | |
aded7165 | 33 | struct vmbus_channel_msginfo **msgInfo, |
f4266e34 | 34 | u32 *MessageCount); |
aded7165 GKH |
35 | static void DumpVmbusChannel(struct vmbus_channel *channel); |
36 | static void VmbusChannelSetEvent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
37 | |
38 | ||
39 | #if 0 | |
f4266e34 | 40 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
3e7ee490 | 41 | { |
f4266e34 GKH |
42 | int i = 0; |
43 | int j = 0; | |
3e7ee490 | 44 | |
f4266e34 GKH |
45 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
46 | MonitorPage, MonitorPage->TriggerState); | |
3e7ee490 | 47 | |
f4266e34 GKH |
48 | for (i = 0; i < 4; i++) |
49 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, | |
50 | MonitorPage->TriggerGroup[i].AsUINT64); | |
3e7ee490 | 51 | |
f4266e34 GKH |
52 | for (i = 0; i < 4; i++) { |
53 | for (j = 0; j < 32; j++) { | |
54 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, | |
55 | MonitorPage->Latency[i][j]); | |
3e7ee490 HJ |
56 | } |
57 | } | |
f4266e34 GKH |
58 | for (i = 0; i < 4; i++) { |
59 | for (j = 0; j < 32; j++) { | |
60 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, | |
61 | MonitorPage->Parameter[i][j].ConnectionId.Asu32); | |
62 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, | |
63 | MonitorPage->Parameter[i][j].FlagNumber); | |
3e7ee490 HJ |
64 | } |
65 | } | |
66 | } | |
67 | #endif | |
68 | ||
3e189519 HJ |
69 | /* |
70 | * VmbusChannelSetEvent - Trigger an event notification on the specified | |
71 | * channel. | |
f4266e34 | 72 | */ |
aded7165 | 73 | static void VmbusChannelSetEvent(struct vmbus_channel *Channel) |
3e7ee490 | 74 | { |
eacb1b4d | 75 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
76 | |
77 | DPRINT_ENTER(VMBUS); | |
78 | ||
f4266e34 | 79 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 80 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
81 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
82 | (unsigned long *) gVmbusConnection.SendInterruptPage + | |
f4266e34 | 83 | (Channel->OfferMsg.ChildRelId >> 5)); |
3e7ee490 | 84 | |
f4266e34 | 85 | monitorPage = gVmbusConnection.MonitorPages; |
454f18a9 | 86 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 87 | |
7c369f40 | 88 | set_bit(Channel->MonitorBit, |
f4266e34 GKH |
89 | (unsigned long *)&monitorPage->TriggerGroup |
90 | [Channel->MonitorGroup].Pending); | |
7c369f40 | 91 | |
f4266e34 | 92 | } else { |
3e7ee490 HJ |
93 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); |
94 | } | |
95 | ||
96 | DPRINT_EXIT(VMBUS); | |
97 | } | |
98 | ||
99 | #if 0 | |
aded7165 | 100 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 101 | { |
eacb1b4d | 102 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
103 | |
104 | DPRINT_ENTER(VMBUS); | |
105 | ||
f4266e34 | 106 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 107 | /* Each u32 represents 32 channels */ |
7c369f40 | 108 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
f4266e34 GKH |
109 | (unsigned long *)gVmbusConnection.SendInterruptPage + |
110 | (Channel->OfferMsg.ChildRelId >> 5)); | |
3e7ee490 | 111 | |
f4266e34 GKH |
112 | monitorPage = |
113 | (struct hv_monitor_page *)gVmbusConnection.MonitorPages; | |
454f18a9 | 114 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 115 | |
7c369f40 | 116 | clear_bit(Channel->MonitorBit, |
f4266e34 GKH |
117 | (unsigned long *)&monitorPage->TriggerGroup |
118 | [Channel->MonitorGroup].Pending); | |
3e7ee490 HJ |
119 | } |
120 | ||
121 | DPRINT_EXIT(VMBUS); | |
122 | } | |
123 | ||
124 | #endif | |
3e189519 | 125 | /* |
f4266e34 GKH |
126 | * VmbusChannelGetDebugInfo -Retrieve various channel debug info |
127 | */ | |
aded7165 GKH |
128 | void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel, |
129 | struct vmbus_channel_debug_info *DebugInfo) | |
3e7ee490 | 130 | { |
eacb1b4d | 131 | struct hv_monitor_page *monitorPage; |
f4266e34 GKH |
132 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
133 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 134 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 HJ |
135 | |
136 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
137 | DebugInfo->State = Channel->State; | |
f4266e34 GKH |
138 | memcpy(&DebugInfo->InterfaceType, |
139 | &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); | |
140 | memcpy(&DebugInfo->InterfaceInstance, | |
141 | &Channel->OfferMsg.Offer.InterfaceInstance, | |
142 | sizeof(struct hv_guid)); | |
3e7ee490 | 143 | |
eacb1b4d | 144 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 HJ |
145 | |
146 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
147 | ||
f4266e34 GKH |
148 | DebugInfo->ServerMonitorPending = |
149 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
150 | DebugInfo->ServerMonitorLatency = | |
151 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
152 | DebugInfo->ServerMonitorConnectionId = | |
153 | monitorPage->Parameter[monitorGroup] | |
154 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
155 | |
156 | monitorPage++; | |
157 | ||
f4266e34 GKH |
158 | DebugInfo->ClientMonitorPending = |
159 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
160 | DebugInfo->ClientMonitorLatency = | |
161 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
162 | DebugInfo->ClientMonitorConnectionId = | |
163 | monitorPage->Parameter[monitorGroup] | |
164 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
165 | |
166 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
167 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
168 | } | |
169 | ||
3e189519 | 170 | /* |
f4266e34 GKH |
171 | * VmbusChannelOpen - Open the specified channel. |
172 | */ | |
173 | int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize, | |
174 | u32 RecvRingBufferSize, void *UserData, u32 UserDataLen, | |
79035069 | 175 | void (*OnChannelCallback)(void *context), void *Context) |
3e7ee490 | 176 | { |
82250213 | 177 | struct vmbus_channel_open_channel *openMsg; |
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 */ |
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); | |
b94ef345 BP |
221 | |
222 | if (!ret) { | |
223 | err = ret; | |
224 | goto errorout; | |
225 | } | |
f4266e34 GKH |
226 | |
227 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
228 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
229 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
230 | NewChannel->RingBufferGpadlHandle, | |
231 | NewChannel->Outbound.RingBuffer, | |
232 | NewChannel->Outbound.RingSize, | |
233 | NewChannel->Inbound.RingBuffer, | |
234 | NewChannel->Inbound.RingSize, | |
235 | SendRingBufferSize); | |
3e7ee490 | 236 | |
454f18a9 | 237 | /* Create and init the channel open message */ |
f4266e34 GKH |
238 | openInfo = kmalloc(sizeof(*openInfo) + |
239 | sizeof(struct vmbus_channel_open_channel), | |
240 | GFP_KERNEL); | |
c3bf2e26 BP |
241 | if (!openInfo) { |
242 | err = -ENOMEM; | |
243 | goto errorout; | |
244 | } | |
3e7ee490 | 245 | |
bfc30aae | 246 | openInfo->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
247 | if (!openInfo->WaitEvent) { |
248 | err = -ENOMEM; | |
249 | goto errorout; | |
250 | } | |
3e7ee490 | 251 | |
82250213 | 252 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
253 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
254 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
255 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
256 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
f4266e34 GKH |
257 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> |
258 | PAGE_SHIFT; | |
259 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 HJ |
260 | |
261 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
262 | if (UserDataLen) | |
3e7ee490 | 263 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 264 | |
dd0813b6 | 265 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
266 | list_add_tail(&openInfo->MsgListEntry, |
267 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 268 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
269 | |
270 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
271 | ||
f4266e34 GKH |
272 | ret = VmbusPostMessage(openMsg, |
273 | sizeof(struct vmbus_channel_open_channel)); | |
274 | if (ret != 0) { | |
3e7ee490 HJ |
275 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
276 | goto Cleanup; | |
277 | } | |
278 | ||
454f18a9 | 279 | /* FIXME: Need to time-out here */ |
bfc30aae | 280 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
281 | |
282 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 283 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 284 | else |
f4266e34 GKH |
285 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
286 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
287 | |
288 | Cleanup: | |
dd0813b6 | 289 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 290 | list_del(&openInfo->MsgListEntry); |
dd0813b6 | 291 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 292 | |
420beac4 | 293 | kfree(openInfo->WaitEvent); |
8c69f52a | 294 | kfree(openInfo); |
3e7ee490 HJ |
295 | |
296 | DPRINT_EXIT(VMBUS); | |
297 | ||
298 | return 0; | |
c3bf2e26 BP |
299 | |
300 | errorout: | |
b94ef345 BP |
301 | RingBufferCleanup(&NewChannel->Outbound); |
302 | RingBufferCleanup(&NewChannel->Inbound); | |
c3bf2e26 BP |
303 | osd_PageFree(out, (SendRingBufferSize + RecvRingBufferSize) |
304 | >> PAGE_SHIFT); | |
305 | kfree(openInfo); | |
306 | return err; | |
3e7ee490 HJ |
307 | } |
308 | ||
3e189519 HJ |
309 | /* |
310 | * DumpGpadlBody - Dump the gpadl body message to the console for | |
311 | * debugging purposes. | |
f4266e34 | 312 | */ |
82250213 | 313 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 | 314 | { |
f4266e34 GKH |
315 | int i; |
316 | int pfnCount; | |
3e7ee490 | 317 | |
f4266e34 GKH |
318 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) / |
319 | sizeof(u64); | |
3e7ee490 HJ |
320 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
321 | ||
f4266e34 GKH |
322 | for (i = 0; i < pfnCount; i++) |
323 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", | |
324 | i, Gpadl->Pfn[i]); | |
3e7ee490 HJ |
325 | } |
326 | ||
3e189519 HJ |
327 | /* |
328 | * DumpGpadlHeader - Dump the gpadl header message to the console for | |
329 | * debugging purposes. | |
f4266e34 | 330 | */ |
82250213 | 331 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 | 332 | { |
f4266e34 GKH |
333 | int i, j; |
334 | int pageCount; | |
3e7ee490 | 335 | |
f4266e34 GKH |
336 | DPRINT_DBG(VMBUS, |
337 | "gpadl header - relid %d, range count %d, range buflen %d", | |
338 | Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen); | |
339 | for (i = 0; i < Gpadl->RangeCount; i++) { | |
3e7ee490 | 340 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
f4266e34 | 341 | pageCount = (pageCount > 26) ? 26 : pageCount; |
3e7ee490 | 342 | |
f4266e34 GKH |
343 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
344 | "page count %d", i, Gpadl->Range[i].ByteCount, | |
345 | Gpadl->Range[i].ByteOffset, pageCount); | |
3e7ee490 | 346 | |
f4266e34 GKH |
347 | for (j = 0; j < pageCount; j++) |
348 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, | |
349 | Gpadl->Range[i].PfnArray[j]); | |
3e7ee490 HJ |
350 | } |
351 | } | |
352 | ||
3e189519 | 353 | /* |
f4266e34 GKH |
354 | * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer |
355 | */ | |
356 | static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size, | |
357 | struct vmbus_channel_msginfo **MsgInfo, | |
358 | u32 *MessageCount) | |
3e7ee490 HJ |
359 | { |
360 | int i; | |
361 | int pageCount; | |
f4266e34 | 362 | unsigned long long pfn; |
82250213 GKH |
363 | struct vmbus_channel_gpadl_header *gpaHeader; |
364 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 GKH |
365 | struct vmbus_channel_msginfo *msgHeader; |
366 | struct vmbus_channel_msginfo *msgBody; | |
f4266e34 | 367 | u32 msgSize; |
3e7ee490 HJ |
368 | |
369 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
370 | ||
f4266e34 GKH |
371 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
372 | ASSERT((Size & (PAGE_SIZE-1)) == 0); | |
3e7ee490 HJ |
373 | |
374 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 375 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 376 | |
454f18a9 | 377 | /* do we need a gpadl body msg */ |
f4266e34 GKH |
378 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
379 | sizeof(struct vmbus_channel_gpadl_header) - | |
380 | sizeof(struct gpa_range); | |
59471438 | 381 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 382 | |
f4266e34 GKH |
383 | if (pageCount > pfnCount) { |
384 | /* we need a gpadl body */ | |
454f18a9 | 385 | /* fill in the header */ |
f4266e34 GKH |
386 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
387 | sizeof(struct vmbus_channel_gpadl_header) + | |
388 | sizeof(struct gpa_range) + pfnCount * sizeof(u64); | |
e276a3a5 | 389 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
d1c250bb BP |
390 | if (!msgHeader) |
391 | goto nomem; | |
3e7ee490 | 392 | |
53af545b | 393 | INIT_LIST_HEAD(&msgHeader->SubMsgList); |
f4266e34 | 394 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 395 | |
82250213 | 396 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 397 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
398 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
399 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
400 | gpaHeader->Range[0].ByteOffset = 0; |
401 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 402 | for (i = 0; i < pfnCount; i++) |
3e7ee490 | 403 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
404 | *MsgInfo = msgHeader; |
405 | *MessageCount = 1; | |
406 | ||
407 | pfnSum = pfnCount; | |
408 | pfnLeft = pageCount - pfnCount; | |
409 | ||
454f18a9 | 410 | /* how many pfns can we fit */ |
f4266e34 GKH |
411 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
412 | sizeof(struct vmbus_channel_gpadl_body); | |
59471438 | 413 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 414 | |
454f18a9 | 415 | /* fill in the body */ |
f4266e34 | 416 | while (pfnLeft) { |
3e7ee490 | 417 | if (pfnLeft > pfnCount) |
3e7ee490 | 418 | pfnCurr = pfnCount; |
3e7ee490 | 419 | else |
3e7ee490 | 420 | pfnCurr = pfnLeft; |
3e7ee490 | 421 | |
f4266e34 GKH |
422 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
423 | sizeof(struct vmbus_channel_gpadl_body) + | |
424 | pfnCurr * sizeof(u64); | |
e276a3a5 | 425 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
d1c250bb BP |
426 | /* FIXME: we probably need to more if this fails */ |
427 | if (!msgBody) | |
428 | goto nomem; | |
3e7ee490 HJ |
429 | msgBody->MessageSize = msgSize; |
430 | (*MessageCount)++; | |
f4266e34 GKH |
431 | gpadlBody = |
432 | (struct vmbus_channel_gpadl_body *)msgBody->Msg; | |
433 | ||
434 | /* | |
435 | * FIXME: | |
436 | * Gpadl is u32 and we are using a pointer which could | |
437 | * be 64-bit | |
438 | */ | |
454f18a9 | 439 | /* gpadlBody->Gpadl = kbuffer; */ |
f4266e34 | 440 | for (i = 0; i < pfnCurr; i++) |
3e7ee490 | 441 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
3e7ee490 | 442 | |
454f18a9 | 443 | /* add to msg header */ |
53af545b BP |
444 | list_add_tail(&msgBody->MsgListEntry, |
445 | &msgHeader->SubMsgList); | |
3e7ee490 HJ |
446 | pfnSum += pfnCurr; |
447 | pfnLeft -= pfnCurr; | |
448 | } | |
f4266e34 | 449 | } else { |
454f18a9 | 450 | /* everything fits in a header */ |
f4266e34 GKH |
451 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
452 | sizeof(struct vmbus_channel_gpadl_header) + | |
453 | sizeof(struct gpa_range) + pageCount * sizeof(u64); | |
e276a3a5 | 454 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
f4266e34 | 455 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 456 | |
82250213 | 457 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 458 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
459 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
460 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
461 | gpaHeader->Range[0].ByteOffset = 0; |
462 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 463 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 464 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
465 | |
466 | *MsgInfo = msgHeader; | |
467 | *MessageCount = 1; | |
468 | } | |
469 | ||
470 | return 0; | |
d1c250bb BP |
471 | nomem: |
472 | kfree(msgHeader); | |
473 | kfree(msgBody); | |
474 | return -ENOMEM; | |
3e7ee490 HJ |
475 | } |
476 | ||
3e189519 | 477 | /* |
f4266e34 GKH |
478 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer |
479 | * | |
480 | * @Channel: a channel | |
481 | * @Kbuffer: from kmalloc | |
482 | * @Size: page-size multiple | |
483 | * @GpadlHandle: some funky thing | |
484 | */ | |
485 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
486 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 487 | { |
82250213 GKH |
488 | struct vmbus_channel_gpadl_header *gpadlMsg; |
489 | struct vmbus_channel_gpadl_body *gpadlBody; | |
490 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
c3bf2e26 | 491 | struct vmbus_channel_msginfo *msgInfo = NULL; |
aded7165 | 492 | struct vmbus_channel_msginfo *subMsgInfo; |
4d643114 | 493 | u32 msgCount; |
53af545b | 494 | struct list_head *curr; |
4d643114 | 495 | u32 nextGpadlHandle; |
dd0813b6 | 496 | unsigned long flags; |
c3bf2e26 | 497 | int ret = 0; |
3e7ee490 HJ |
498 | |
499 | DPRINT_ENTER(VMBUS); | |
500 | ||
f4888417 BP |
501 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
502 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 | 503 | |
c3bf2e26 BP |
504 | ret = VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); |
505 | if (ret) | |
506 | return ret; | |
3e7ee490 | 507 | |
bfc30aae | 508 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
509 | if (!msgInfo->WaitEvent) { |
510 | ret = -ENOMEM; | |
511 | goto Cleanup; | |
512 | } | |
513 | ||
82250213 | 514 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
515 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
516 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
517 | gpadlMsg->Gpadl = nextGpadlHandle; | |
518 | ||
519 | DumpGpadlHeader(gpadlMsg); | |
520 | ||
dd0813b6 | 521 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
522 | list_add_tail(&msgInfo->MsgListEntry, |
523 | &gVmbusConnection.ChannelMsgList); | |
3e7ee490 | 524 | |
53af545b | 525 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
526 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
527 | Kbuffer, Size, msgCount); | |
3e7ee490 | 528 | |
f4266e34 GKH |
529 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
530 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 531 | |
f4266e34 GKH |
532 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
533 | sizeof(*msgInfo)); | |
534 | if (ret != 0) { | |
3e7ee490 HJ |
535 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
536 | goto Cleanup; | |
537 | } | |
538 | ||
f4266e34 | 539 | if (msgCount > 1) { |
53af545b BP |
540 | list_for_each(curr, &msgInfo->SubMsgList) { |
541 | ||
542 | /* FIXME: should this use list_entry() instead ? */ | |
82250213 | 543 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
544 | gpadlBody = |
545 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
546 | |
547 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
548 | gpadlBody->Gpadl = nextGpadlHandle; | |
549 | ||
f4266e34 GKH |
550 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
551 | subMsgInfo->MessageSize - | |
552 | sizeof(*subMsgInfo)); | |
3e7ee490 | 553 | |
f4266e34 GKH |
554 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
555 | sizeof(*subMsgInfo)); | |
556 | ret = VmbusPostMessage(gpadlBody, | |
557 | subMsgInfo->MessageSize - | |
558 | sizeof(*subMsgInfo)); | |
99259159 BP |
559 | if (!ret) |
560 | goto Cleanup; | |
561 | ||
3e7ee490 HJ |
562 | } |
563 | } | |
bfc30aae | 564 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 565 | |
454f18a9 | 566 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
567 | DPRINT_DBG(VMBUS, "Received GPADL created " |
568 | "(relid %d, status %d handle %x)", | |
569 | Channel->OfferMsg.ChildRelId, | |
570 | msgInfo->Response.GpadlCreated.CreationStatus, | |
571 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
572 | |
573 | *GpadlHandle = gpadlMsg->Gpadl; | |
574 | ||
575 | Cleanup: | |
dd0813b6 | 576 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 577 | list_del(&msgInfo->MsgListEntry); |
dd0813b6 | 578 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 579 | |
420beac4 | 580 | kfree(msgInfo->WaitEvent); |
8c69f52a | 581 | kfree(msgInfo); |
3e7ee490 HJ |
582 | |
583 | DPRINT_EXIT(VMBUS); | |
584 | ||
585 | return ret; | |
586 | } | |
587 | ||
3e189519 | 588 | /* |
f4266e34 GKH |
589 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle |
590 | */ | |
aded7165 | 591 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 592 | { |
82250213 | 593 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 594 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 595 | unsigned long flags; |
f4266e34 | 596 | int ret; |
3e7ee490 HJ |
597 | |
598 | DPRINT_ENTER(VMBUS); | |
599 | ||
600 | ASSERT(GpadlHandle != 0); | |
601 | ||
f4266e34 GKH |
602 | info = kmalloc(sizeof(*info) + |
603 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
604 | if (!info) |
605 | return -ENOMEM; | |
3e7ee490 | 606 | |
bfc30aae | 607 | info->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
608 | if (!info->WaitEvent) { |
609 | kfree(info); | |
610 | return -ENOMEM; | |
611 | } | |
3e7ee490 | 612 | |
82250213 | 613 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
614 | |
615 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
616 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
617 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 618 | |
dd0813b6 | 619 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
620 | list_add_tail(&info->MsgListEntry, |
621 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 622 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 623 | |
f4266e34 GKH |
624 | ret = VmbusPostMessage(msg, |
625 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
626 | if (ret != 0) { | |
454f18a9 | 627 | /* TODO: */ |
f4266e34 | 628 | /* something... */ |
3e7ee490 HJ |
629 | } |
630 | ||
bfc30aae | 631 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 632 | |
454f18a9 | 633 | /* Received a torndown response */ |
dd0813b6 | 634 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 635 | list_del(&info->MsgListEntry); |
dd0813b6 | 636 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 637 | |
420beac4 | 638 | kfree(info->WaitEvent); |
8c69f52a | 639 | kfree(info); |
3e7ee490 HJ |
640 | |
641 | DPRINT_EXIT(VMBUS); | |
642 | ||
643 | return ret; | |
644 | } | |
645 | ||
3e189519 | 646 | /* |
f4266e34 GKH |
647 | * VmbusChannelClose - Close the specified channel |
648 | */ | |
aded7165 | 649 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 650 | { |
82250213 | 651 | struct vmbus_channel_close_channel *msg; |
aded7165 | 652 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 653 | unsigned long flags; |
f4266e34 | 654 | int ret; |
3e7ee490 HJ |
655 | |
656 | DPRINT_ENTER(VMBUS); | |
657 | ||
454f18a9 | 658 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 659 | Channel->OnChannelCallback = NULL; |
5996b3dd | 660 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 661 | |
454f18a9 | 662 | /* Send a closing message */ |
f4266e34 GKH |
663 | info = kmalloc(sizeof(*info) + |
664 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
665 | /* FIXME: can't do anything other than return here because the |
666 | * function is void */ | |
667 | if (!info) | |
668 | return; | |
3e7ee490 | 669 | |
bfc30aae | 670 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 671 | |
82250213 | 672 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
673 | msg->Header.MessageType = ChannelMessageCloseChannel; |
674 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 675 | |
82250213 | 676 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 677 | if (ret != 0) { |
454f18a9 | 678 | /* TODO: */ |
f4266e34 | 679 | /* something... */ |
3e7ee490 HJ |
680 | } |
681 | ||
454f18a9 | 682 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 683 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
684 | VmbusChannelTeardownGpadl(Channel, |
685 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 686 | |
454f18a9 | 687 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 688 | |
454f18a9 | 689 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
690 | RingBufferCleanup(&Channel->Outbound); |
691 | RingBufferCleanup(&Channel->Inbound); | |
692 | ||
bfc30aae | 693 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 694 | |
8c69f52a | 695 | kfree(info); |
3e7ee490 | 696 | |
454f18a9 BP |
697 | /* |
698 | * If we are closing the channel during an error path in | |
699 | * opening the channel, don't free the channel since the | |
700 | * caller will free the channel | |
701 | */ | |
702 | ||
f4266e34 | 703 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 704 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 705 | list_del(&Channel->ListEntry); |
0f5e44ca | 706 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
707 | |
708 | FreeVmbusChannel(Channel); | |
709 | } | |
710 | ||
711 | DPRINT_EXIT(VMBUS); | |
712 | } | |
713 | ||
c88c4e4c HJ |
714 | /** |
715 | * VmbusChannelSendPacket() - Send the specified buffer on the given channel | |
716 | * @Channel: Pointer to vmbus_channel structure. | |
717 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
718 | * @BufferLen: Maximum size of what the the buffer will hold | |
719 | * @RequestId: Identifier of the request | |
720 | * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time | |
721 | * packet etc. | |
722 | * | |
723 | * Sends data in @Buffer directly to hyper-v via the vmbus | |
724 | * This will send the data unparsed to hyper-v. | |
725 | * | |
726 | * Mainly used by Hyper-V drivers. | |
f4266e34 GKH |
727 | */ |
728 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
729 | u32 BufferLen, u64 RequestId, | |
730 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 731 | { |
8dc0a06a GKH |
732 | struct vmpacket_descriptor desc; |
733 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 734 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 735 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
736 | u64 alignedData = 0; |
737 | int ret; | |
3e7ee490 HJ |
738 | |
739 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
740 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
741 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
742 | |
743 | DumpVmbusChannel(Channel); | |
744 | ||
59471438 | 745 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 746 | |
454f18a9 BP |
747 | /* Setup the descriptor */ |
748 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
749 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
750 | /* in 8-bytes granularity */ |
751 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
752 | desc.Length8 = (u16)(packetLenAligned >> 3); |
753 | desc.TransactionId = RequestId; | |
3e7ee490 | 754 | |
f4266e34 | 755 | sg_init_table(bufferList, 3); |
8dc0a06a | 756 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
757 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
758 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 759 | |
f4266e34 | 760 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 761 | |
454f18a9 | 762 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 763 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 764 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
765 | |
766 | DPRINT_EXIT(VMBUS); | |
767 | ||
768 | return ret; | |
769 | } | |
c88c4e4c | 770 | EXPORT_SYMBOL(VmbusChannelSendPacket); |
3e7ee490 | 771 | |
3e189519 HJ |
772 | /* |
773 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer | |
774 | * packets using a GPADL Direct packet type. | |
f4266e34 | 775 | */ |
aded7165 | 776 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
777 | struct hv_page_buffer PageBuffers[], |
778 | u32 PageCount, void *Buffer, u32 BufferLen, | |
779 | u64 RequestId) | |
3e7ee490 | 780 | { |
f4266e34 GKH |
781 | int ret; |
782 | int i; | |
0cf4fa80 | 783 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
784 | u32 descSize; |
785 | u32 packetLen; | |
786 | u32 packetLenAligned; | |
b219b3f7 | 787 | struct scatterlist bufferList[3]; |
f4266e34 | 788 | u64 alignedData = 0; |
3e7ee490 HJ |
789 | |
790 | DPRINT_ENTER(VMBUS); | |
791 | ||
792 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
793 | ||
794 | DumpVmbusChannel(Channel); | |
795 | ||
f4266e34 GKH |
796 | /* |
797 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
798 | * largest size we support | |
799 | */ | |
800 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
801 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
802 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 803 | packetLen = descSize + BufferLen; |
59471438 | 804 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 805 | |
59471438 | 806 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 807 | |
454f18a9 | 808 | /* Setup the descriptor */ |
3e7ee490 HJ |
809 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
810 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
811 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
812 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
813 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
814 | desc.RangeCount = PageCount; |
815 | ||
f4266e34 | 816 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
817 | desc.Range[i].Length = PageBuffers[i].Length; |
818 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
819 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
820 | } | |
821 | ||
f4266e34 | 822 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
823 | sg_set_buf(&bufferList[0], &desc, descSize); |
824 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
825 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 826 | |
f4266e34 | 827 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 828 | |
454f18a9 | 829 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 830 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 831 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
832 | |
833 | DPRINT_EXIT(VMBUS); | |
834 | ||
835 | return ret; | |
836 | } | |
837 | ||
3e189519 HJ |
838 | /* |
839 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet | |
840 | * using a GPADL Direct packet type. | |
f4266e34 | 841 | */ |
aded7165 | 842 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
843 | struct hv_multipage_buffer *MultiPageBuffer, |
844 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 845 | { |
f4266e34 | 846 | int ret; |
3fcc523a | 847 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
848 | u32 descSize; |
849 | u32 packetLen; | |
850 | u32 packetLenAligned; | |
b219b3f7 | 851 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
852 | u64 alignedData = 0; |
853 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
854 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
855 | |
856 | DPRINT_ENTER(VMBUS); | |
857 | ||
858 | DumpVmbusChannel(Channel); | |
859 | ||
f4266e34 GKH |
860 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
861 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 HJ |
862 | |
863 | ASSERT(PfnCount > 0); | |
864 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
865 | ||
f4266e34 GKH |
866 | /* |
867 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
868 | * the largest size we support | |
869 | */ | |
870 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
871 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
872 | sizeof(u64)); | |
3e7ee490 | 873 | packetLen = descSize + BufferLen; |
59471438 | 874 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 875 | |
59471438 | 876 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 877 | |
454f18a9 | 878 | /* Setup the descriptor */ |
3e7ee490 HJ |
879 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
880 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
881 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
882 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
883 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
884 | desc.RangeCount = 1; |
885 | ||
886 | desc.Range.Length = MultiPageBuffer->Length; | |
887 | desc.Range.Offset = MultiPageBuffer->Offset; | |
888 | ||
f4266e34 GKH |
889 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
890 | PfnCount * sizeof(u64)); | |
3e7ee490 | 891 | |
f4266e34 | 892 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
893 | sg_set_buf(&bufferList[0], &desc, descSize); |
894 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
895 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 896 | |
f4266e34 | 897 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 898 | |
454f18a9 | 899 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 900 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 901 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
902 | |
903 | DPRINT_EXIT(VMBUS); | |
904 | ||
905 | return ret; | |
906 | } | |
907 | ||
c88c4e4c HJ |
908 | |
909 | /** | |
910 | * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel | |
911 | * @Channel: Pointer to vmbus_channel structure. | |
912 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
913 | * @BufferLen: Maximum size of what the the buffer will hold | |
914 | * @BufferActualLen: The actual size of the data after it was received | |
915 | * @RequestId: Identifier of the request | |
916 | * | |
917 | * Receives directly from the hyper-v vmbus and puts the data it received | |
918 | * into Buffer. This will receive the data unparsed from hyper-v. | |
919 | * | |
920 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 921 | */ |
f4266e34 GKH |
922 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
923 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 924 | { |
8dc0a06a | 925 | struct vmpacket_descriptor desc; |
4d643114 GKH |
926 | u32 packetLen; |
927 | u32 userLen; | |
3e7ee490 | 928 | int ret; |
54411c42 | 929 | unsigned long flags; |
3e7ee490 HJ |
930 | |
931 | DPRINT_ENTER(VMBUS); | |
932 | ||
933 | *BufferActualLen = 0; | |
934 | *RequestId = 0; | |
935 | ||
54411c42 | 936 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 937 | |
f4266e34 GKH |
938 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
939 | sizeof(struct vmpacket_descriptor)); | |
940 | if (ret != 0) { | |
54411c42 | 941 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 942 | |
454f18a9 | 943 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
944 | DPRINT_EXIT(VMBUS); |
945 | return 0; | |
946 | } | |
947 | ||
454f18a9 | 948 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
949 | |
950 | packetLen = desc.Length8 << 3; | |
951 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 952 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 953 | |
f4266e34 GKH |
954 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
955 | "flag %d tid %llx pktlen %d datalen %d> ", | |
956 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
957 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
958 | |
959 | *BufferActualLen = userLen; | |
960 | ||
f4266e34 | 961 | if (userLen > BufferLen) { |
54411c42 | 962 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 963 | |
f4266e34 GKH |
964 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
965 | BufferLen, userLen); | |
3e7ee490 HJ |
966 | DPRINT_EXIT(VMBUS); |
967 | ||
968 | return -1; | |
969 | } | |
970 | ||
971 | *RequestId = desc.TransactionId; | |
972 | ||
454f18a9 | 973 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
974 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
975 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 976 | |
54411c42 | 977 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
978 | |
979 | DPRINT_EXIT(VMBUS); | |
980 | ||
981 | return 0; | |
982 | } | |
c88c4e4c | 983 | EXPORT_SYMBOL(VmbusChannelRecvPacket); |
3e7ee490 | 984 | |
3e189519 | 985 | /* |
f4266e34 GKH |
986 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel |
987 | */ | |
988 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
989 | u32 BufferLen, u32 *BufferActualLen, | |
990 | u64 *RequestId) | |
3e7ee490 | 991 | { |
8dc0a06a | 992 | struct vmpacket_descriptor desc; |
4d643114 GKH |
993 | u32 packetLen; |
994 | u32 userLen; | |
3e7ee490 | 995 | int ret; |
54411c42 | 996 | unsigned long flags; |
3e7ee490 HJ |
997 | |
998 | DPRINT_ENTER(VMBUS); | |
999 | ||
1000 | *BufferActualLen = 0; | |
1001 | *RequestId = 0; | |
1002 | ||
54411c42 | 1003 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 1004 | |
f4266e34 GKH |
1005 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
1006 | sizeof(struct vmpacket_descriptor)); | |
1007 | if (ret != 0) { | |
54411c42 | 1008 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1009 | |
454f18a9 | 1010 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
1011 | DPRINT_EXIT(VMBUS); |
1012 | return 0; | |
1013 | } | |
1014 | ||
454f18a9 | 1015 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
1016 | |
1017 | packetLen = desc.Length8 << 3; | |
1018 | userLen = packetLen - (desc.DataOffset8 << 3); | |
1019 | ||
f4266e34 GKH |
1020 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
1021 | "flag %d tid %llx pktlen %d datalen %d> ", | |
1022 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
1023 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
1024 | |
1025 | *BufferActualLen = packetLen; | |
1026 | ||
f4266e34 | 1027 | if (packetLen > BufferLen) { |
54411c42 | 1028 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 1029 | |
f4266e34 GKH |
1030 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
1031 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
1032 | DPRINT_EXIT(VMBUS); |
1033 | return -2; | |
1034 | } | |
1035 | ||
1036 | *RequestId = desc.TransactionId; | |
1037 | ||
454f18a9 | 1038 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
1039 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
1040 | ||
54411c42 | 1041 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1042 | |
1043 | DPRINT_EXIT(VMBUS); | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
3e189519 | 1048 | /* |
f4266e34 GKH |
1049 | * VmbusChannelOnChannelEvent - Channel event callback |
1050 | */ | |
aded7165 | 1051 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1052 | { |
1053 | DumpVmbusChannel(Channel); | |
1054 | ASSERT(Channel->OnChannelCallback); | |
5996b3dd | 1055 | |
3e7ee490 | 1056 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
5996b3dd HZ |
1057 | |
1058 | mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100)); | |
3e7ee490 HJ |
1059 | } |
1060 | ||
3e189519 | 1061 | /* |
f4266e34 GKH |
1062 | * VmbusChannelOnTimer - Timer event callback |
1063 | */ | |
46a05253 | 1064 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1065 | { |
aded7165 | 1066 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1067 | |
0fa37b1e | 1068 | if (channel->OnChannelCallback) |
3e7ee490 | 1069 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
1070 | } |
1071 | ||
3e189519 | 1072 | /* |
f4266e34 GKH |
1073 | * DumpVmbusChannel - Dump vmbus channel info to the console |
1074 | */ | |
aded7165 | 1075 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1076 | { |
1077 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1078 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1079 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1080 | } |