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 | 76 | |
f4266e34 | 77 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 78 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
79 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
80 | (unsigned long *) gVmbusConnection.SendInterruptPage + | |
f4266e34 | 81 | (Channel->OfferMsg.ChildRelId >> 5)); |
3e7ee490 | 82 | |
f4266e34 | 83 | monitorPage = gVmbusConnection.MonitorPages; |
454f18a9 | 84 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 85 | |
7c369f40 | 86 | set_bit(Channel->MonitorBit, |
f4266e34 GKH |
87 | (unsigned long *)&monitorPage->TriggerGroup |
88 | [Channel->MonitorGroup].Pending); | |
7c369f40 | 89 | |
f4266e34 | 90 | } else { |
3e7ee490 HJ |
91 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); |
92 | } | |
3e7ee490 HJ |
93 | } |
94 | ||
95 | #if 0 | |
aded7165 | 96 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 97 | { |
eacb1b4d | 98 | struct hv_monitor_page *monitorPage; |
3e7ee490 | 99 | |
f4266e34 | 100 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 101 | /* Each u32 represents 32 channels */ |
7c369f40 | 102 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
f4266e34 GKH |
103 | (unsigned long *)gVmbusConnection.SendInterruptPage + |
104 | (Channel->OfferMsg.ChildRelId >> 5)); | |
3e7ee490 | 105 | |
f4266e34 GKH |
106 | monitorPage = |
107 | (struct hv_monitor_page *)gVmbusConnection.MonitorPages; | |
454f18a9 | 108 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 109 | |
7c369f40 | 110 | clear_bit(Channel->MonitorBit, |
f4266e34 GKH |
111 | (unsigned long *)&monitorPage->TriggerGroup |
112 | [Channel->MonitorGroup].Pending); | |
3e7ee490 | 113 | } |
3e7ee490 HJ |
114 | } |
115 | ||
116 | #endif | |
3e189519 | 117 | /* |
f4266e34 GKH |
118 | * VmbusChannelGetDebugInfo -Retrieve various channel debug info |
119 | */ | |
aded7165 GKH |
120 | void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel, |
121 | struct vmbus_channel_debug_info *DebugInfo) | |
3e7ee490 | 122 | { |
eacb1b4d | 123 | struct hv_monitor_page *monitorPage; |
f4266e34 GKH |
124 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
125 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 126 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 HJ |
127 | |
128 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
129 | DebugInfo->State = Channel->State; | |
f4266e34 GKH |
130 | memcpy(&DebugInfo->InterfaceType, |
131 | &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); | |
132 | memcpy(&DebugInfo->InterfaceInstance, | |
133 | &Channel->OfferMsg.Offer.InterfaceInstance, | |
134 | sizeof(struct hv_guid)); | |
3e7ee490 | 135 | |
eacb1b4d | 136 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 HJ |
137 | |
138 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
139 | ||
f4266e34 GKH |
140 | DebugInfo->ServerMonitorPending = |
141 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
142 | DebugInfo->ServerMonitorLatency = | |
143 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
144 | DebugInfo->ServerMonitorConnectionId = | |
145 | monitorPage->Parameter[monitorGroup] | |
146 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
147 | |
148 | monitorPage++; | |
149 | ||
f4266e34 GKH |
150 | DebugInfo->ClientMonitorPending = |
151 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
152 | DebugInfo->ClientMonitorLatency = | |
153 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
154 | DebugInfo->ClientMonitorConnectionId = | |
155 | monitorPage->Parameter[monitorGroup] | |
156 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
157 | |
158 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
159 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
160 | } | |
161 | ||
3e189519 | 162 | /* |
f4266e34 GKH |
163 | * VmbusChannelOpen - Open the specified channel. |
164 | */ | |
165 | int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize, | |
166 | u32 RecvRingBufferSize, void *UserData, u32 UserDataLen, | |
79035069 | 167 | void (*OnChannelCallback)(void *context), void *Context) |
3e7ee490 | 168 | { |
82250213 | 169 | struct vmbus_channel_open_channel *openMsg; |
b94ef345 | 170 | struct vmbus_channel_msginfo *openInfo = NULL; |
3e7ee490 | 171 | void *in, *out; |
dd0813b6 | 172 | unsigned long flags; |
c3bf2e26 | 173 | int ret, err = 0; |
3e7ee490 | 174 | |
454f18a9 | 175 | /* Aligned to page size */ |
0ace247e BP |
176 | /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */ |
177 | /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */ | |
3e7ee490 | 178 | |
79035069 | 179 | NewChannel->OnChannelCallback = OnChannelCallback; |
3e7ee490 HJ |
180 | NewChannel->ChannelCallbackContext = Context; |
181 | ||
454f18a9 | 182 | /* Allocate the ring buffer */ |
f4266e34 GKH |
183 | out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize) |
184 | >> PAGE_SHIFT); | |
7e052d98 BP |
185 | if (!out) |
186 | return -ENOMEM; | |
187 | ||
0ace247e | 188 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 189 | |
f4266e34 | 190 | in = (void *)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
191 | |
192 | NewChannel->RingBufferPages = out; | |
f4266e34 GKH |
193 | NewChannel->RingBufferPageCount = (SendRingBufferSize + |
194 | RecvRingBufferSize) >> PAGE_SHIFT; | |
3e7ee490 | 195 | |
3324fb40 | 196 | ret = RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); |
fd4dc88e | 197 | if (ret != 0) { |
3324fb40 BP |
198 | err = ret; |
199 | goto errorout; | |
200 | } | |
201 | ||
202 | ret = RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
fd4dc88e | 203 | if (ret != 0) { |
3324fb40 BP |
204 | err = ret; |
205 | goto errorout; | |
206 | } | |
3e7ee490 | 207 | |
3e7ee490 | 208 | |
454f18a9 | 209 | /* Establish the gpadl for the ring buffer */ |
f4266e34 GKH |
210 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
211 | NewChannel); | |
3e7ee490 HJ |
212 | |
213 | NewChannel->RingBufferGpadlHandle = 0; | |
214 | ||
215 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
f4266e34 GKH |
216 | NewChannel->Outbound.RingBuffer, |
217 | SendRingBufferSize + | |
218 | RecvRingBufferSize, | |
219 | &NewChannel->RingBufferGpadlHandle); | |
b94ef345 | 220 | |
fd4dc88e | 221 | if (ret != 0) { |
b94ef345 BP |
222 | err = ret; |
223 | goto errorout; | |
224 | } | |
f4266e34 GKH |
225 | |
226 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
227 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
228 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
229 | NewChannel->RingBufferGpadlHandle, | |
230 | NewChannel->Outbound.RingBuffer, | |
231 | NewChannel->Outbound.RingSize, | |
232 | NewChannel->Inbound.RingBuffer, | |
233 | NewChannel->Inbound.RingSize, | |
234 | SendRingBufferSize); | |
3e7ee490 | 235 | |
454f18a9 | 236 | /* Create and init the channel open message */ |
f4266e34 GKH |
237 | openInfo = kmalloc(sizeof(*openInfo) + |
238 | sizeof(struct vmbus_channel_open_channel), | |
239 | GFP_KERNEL); | |
c3bf2e26 BP |
240 | if (!openInfo) { |
241 | err = -ENOMEM; | |
242 | goto errorout; | |
243 | } | |
3e7ee490 | 244 | |
bfc30aae | 245 | openInfo->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
246 | if (!openInfo->WaitEvent) { |
247 | err = -ENOMEM; | |
248 | goto errorout; | |
249 | } | |
3e7ee490 | 250 | |
82250213 | 251 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
252 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
253 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
254 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
255 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
f4266e34 GKH |
256 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> |
257 | PAGE_SHIFT; | |
258 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 | 259 | |
c827f944 BP |
260 | if (UserDataLen > MAX_USER_DEFINED_BYTES) { |
261 | err = -EINVAL; | |
262 | goto errorout; | |
263 | } | |
264 | ||
3e7ee490 | 265 | if (UserDataLen) |
3e7ee490 | 266 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 267 | |
dd0813b6 | 268 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
269 | list_add_tail(&openInfo->MsgListEntry, |
270 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 271 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
272 | |
273 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
274 | ||
f4266e34 GKH |
275 | ret = VmbusPostMessage(openMsg, |
276 | sizeof(struct vmbus_channel_open_channel)); | |
277 | if (ret != 0) { | |
3e7ee490 HJ |
278 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
279 | goto Cleanup; | |
280 | } | |
281 | ||
454f18a9 | 282 | /* FIXME: Need to time-out here */ |
bfc30aae | 283 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
284 | |
285 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 286 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 287 | else |
f4266e34 GKH |
288 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
289 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
290 | |
291 | Cleanup: | |
dd0813b6 | 292 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 293 | list_del(&openInfo->MsgListEntry); |
dd0813b6 | 294 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 295 | |
420beac4 | 296 | kfree(openInfo->WaitEvent); |
8c69f52a | 297 | kfree(openInfo); |
3e7ee490 | 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 | 365 | struct vmbus_channel_msginfo *msgHeader; |
e61fbe66 | 366 | struct vmbus_channel_msginfo *msgBody = NULL; |
f4266e34 | 367 | u32 msgSize; |
3e7ee490 HJ |
368 | |
369 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
370 | ||
f4266e34 | 371 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
0ace247e | 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); |
e3eb7cdd KV |
455 | if (msgHeader == NULL) |
456 | goto nomem; | |
f4266e34 | 457 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 458 | |
82250213 | 459 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 460 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
461 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
462 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
463 | gpaHeader->Range[0].ByteOffset = 0; |
464 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 465 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 466 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
467 | |
468 | *MsgInfo = msgHeader; | |
469 | *MessageCount = 1; | |
470 | } | |
471 | ||
472 | return 0; | |
d1c250bb BP |
473 | nomem: |
474 | kfree(msgHeader); | |
475 | kfree(msgBody); | |
476 | return -ENOMEM; | |
3e7ee490 HJ |
477 | } |
478 | ||
3e189519 | 479 | /* |
f4266e34 GKH |
480 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer |
481 | * | |
482 | * @Channel: a channel | |
483 | * @Kbuffer: from kmalloc | |
484 | * @Size: page-size multiple | |
485 | * @GpadlHandle: some funky thing | |
486 | */ | |
487 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
488 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 489 | { |
82250213 GKH |
490 | struct vmbus_channel_gpadl_header *gpadlMsg; |
491 | struct vmbus_channel_gpadl_body *gpadlBody; | |
492 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
c3bf2e26 | 493 | struct vmbus_channel_msginfo *msgInfo = NULL; |
aded7165 | 494 | struct vmbus_channel_msginfo *subMsgInfo; |
4d643114 | 495 | u32 msgCount; |
53af545b | 496 | struct list_head *curr; |
4d643114 | 497 | u32 nextGpadlHandle; |
dd0813b6 | 498 | unsigned long flags; |
c3bf2e26 | 499 | int ret = 0; |
3e7ee490 | 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)); | |
fd4dc88e | 559 | if (ret != 0) |
99259159 BP |
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 | return ret; |
583 | } | |
584 | ||
3e189519 | 585 | /* |
f4266e34 GKH |
586 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle |
587 | */ | |
aded7165 | 588 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 589 | { |
82250213 | 590 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 591 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 592 | unsigned long flags; |
f4266e34 | 593 | int ret; |
3e7ee490 | 594 | |
0ace247e | 595 | /* ASSERT(GpadlHandle != 0); */ |
3e7ee490 | 596 | |
f4266e34 GKH |
597 | info = kmalloc(sizeof(*info) + |
598 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
599 | if (!info) |
600 | return -ENOMEM; | |
3e7ee490 | 601 | |
bfc30aae | 602 | info->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
603 | if (!info->WaitEvent) { |
604 | kfree(info); | |
605 | return -ENOMEM; | |
606 | } | |
3e7ee490 | 607 | |
82250213 | 608 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
609 | |
610 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
611 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
612 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 613 | |
dd0813b6 | 614 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
615 | list_add_tail(&info->MsgListEntry, |
616 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 617 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 618 | |
f4266e34 GKH |
619 | ret = VmbusPostMessage(msg, |
620 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
621 | if (ret != 0) { | |
454f18a9 | 622 | /* TODO: */ |
f4266e34 | 623 | /* something... */ |
3e7ee490 HJ |
624 | } |
625 | ||
bfc30aae | 626 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 627 | |
454f18a9 | 628 | /* Received a torndown response */ |
dd0813b6 | 629 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 630 | list_del(&info->MsgListEntry); |
dd0813b6 | 631 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 632 | |
420beac4 | 633 | kfree(info->WaitEvent); |
8c69f52a | 634 | kfree(info); |
3e7ee490 HJ |
635 | return ret; |
636 | } | |
637 | ||
3e189519 | 638 | /* |
f4266e34 GKH |
639 | * VmbusChannelClose - Close the specified channel |
640 | */ | |
aded7165 | 641 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 642 | { |
82250213 | 643 | struct vmbus_channel_close_channel *msg; |
aded7165 | 644 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 645 | unsigned long flags; |
f4266e34 | 646 | int ret; |
3e7ee490 | 647 | |
454f18a9 | 648 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 649 | Channel->OnChannelCallback = NULL; |
5996b3dd | 650 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 651 | |
454f18a9 | 652 | /* Send a closing message */ |
f4266e34 GKH |
653 | info = kmalloc(sizeof(*info) + |
654 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
655 | /* FIXME: can't do anything other than return here because the |
656 | * function is void */ | |
657 | if (!info) | |
658 | return; | |
3e7ee490 | 659 | |
bfc30aae | 660 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 661 | |
82250213 | 662 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
663 | msg->Header.MessageType = ChannelMessageCloseChannel; |
664 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 665 | |
82250213 | 666 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 667 | if (ret != 0) { |
454f18a9 | 668 | /* TODO: */ |
f4266e34 | 669 | /* something... */ |
3e7ee490 HJ |
670 | } |
671 | ||
454f18a9 | 672 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 673 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
674 | VmbusChannelTeardownGpadl(Channel, |
675 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 676 | |
454f18a9 | 677 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 678 | |
454f18a9 | 679 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
680 | RingBufferCleanup(&Channel->Outbound); |
681 | RingBufferCleanup(&Channel->Inbound); | |
682 | ||
bfc30aae | 683 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 684 | |
8c69f52a | 685 | kfree(info); |
3e7ee490 | 686 | |
454f18a9 BP |
687 | /* |
688 | * If we are closing the channel during an error path in | |
689 | * opening the channel, don't free the channel since the | |
690 | * caller will free the channel | |
691 | */ | |
692 | ||
f4266e34 | 693 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 694 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 695 | list_del(&Channel->ListEntry); |
0f5e44ca | 696 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
697 | |
698 | FreeVmbusChannel(Channel); | |
699 | } | |
3e7ee490 HJ |
700 | } |
701 | ||
c88c4e4c HJ |
702 | /** |
703 | * VmbusChannelSendPacket() - Send the specified buffer on the given channel | |
704 | * @Channel: Pointer to vmbus_channel structure. | |
705 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
706 | * @BufferLen: Maximum size of what the the buffer will hold | |
707 | * @RequestId: Identifier of the request | |
708 | * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time | |
709 | * packet etc. | |
710 | * | |
711 | * Sends data in @Buffer directly to hyper-v via the vmbus | |
712 | * This will send the data unparsed to hyper-v. | |
713 | * | |
714 | * Mainly used by Hyper-V drivers. | |
f4266e34 GKH |
715 | */ |
716 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
717 | u32 BufferLen, u64 RequestId, | |
718 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 719 | { |
8dc0a06a GKH |
720 | struct vmpacket_descriptor desc; |
721 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 722 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 723 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
724 | u64 alignedData = 0; |
725 | int ret; | |
3e7ee490 | 726 | |
f4266e34 GKH |
727 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
728 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
729 | |
730 | DumpVmbusChannel(Channel); | |
731 | ||
0ace247e | 732 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 733 | |
454f18a9 BP |
734 | /* Setup the descriptor */ |
735 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
736 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
737 | /* in 8-bytes granularity */ |
738 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
739 | desc.Length8 = (u16)(packetLenAligned >> 3); |
740 | desc.TransactionId = RequestId; | |
3e7ee490 | 741 | |
f4266e34 | 742 | sg_init_table(bufferList, 3); |
8dc0a06a | 743 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
744 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
745 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 746 | |
f4266e34 | 747 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 748 | |
454f18a9 | 749 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 750 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 751 | VmbusChannelSetEvent(Channel); |
3e7ee490 | 752 | |
3e7ee490 HJ |
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 | 774 | |
002b53ea BP |
775 | if (PageCount > MAX_PAGE_BUFFER_COUNT) |
776 | return -EINVAL; | |
3e7ee490 HJ |
777 | |
778 | DumpVmbusChannel(Channel); | |
779 | ||
f4266e34 GKH |
780 | /* |
781 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
782 | * largest size we support | |
783 | */ | |
784 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
785 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
786 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 787 | packetLen = descSize + BufferLen; |
59471438 | 788 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 789 | |
0ace247e | 790 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 791 | |
454f18a9 | 792 | /* Setup the descriptor */ |
3e7ee490 HJ |
793 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
794 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
795 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
796 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
797 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
798 | desc.RangeCount = PageCount; |
799 | ||
f4266e34 | 800 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
801 | desc.Range[i].Length = PageBuffers[i].Length; |
802 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
803 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
804 | } | |
805 | ||
f4266e34 | 806 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
807 | sg_set_buf(&bufferList[0], &desc, descSize); |
808 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
809 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 810 | |
f4266e34 | 811 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 812 | |
454f18a9 | 813 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 814 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 815 | VmbusChannelSetEvent(Channel); |
3e7ee490 | 816 | |
3e7ee490 HJ |
817 | return ret; |
818 | } | |
819 | ||
3e189519 HJ |
820 | /* |
821 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet | |
822 | * using a GPADL Direct packet type. | |
f4266e34 | 823 | */ |
aded7165 | 824 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
825 | struct hv_multipage_buffer *MultiPageBuffer, |
826 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 827 | { |
f4266e34 | 828 | int ret; |
3fcc523a | 829 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
830 | u32 descSize; |
831 | u32 packetLen; | |
832 | u32 packetLenAligned; | |
b219b3f7 | 833 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
834 | u64 alignedData = 0; |
835 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
836 | MultiPageBuffer->Length); | |
3e7ee490 | 837 | |
3e7ee490 HJ |
838 | DumpVmbusChannel(Channel); |
839 | ||
f4266e34 GKH |
840 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
841 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 | 842 | |
002b53ea BP |
843 | if ((PfnCount < 0) || (PfnCount > MAX_MULTIPAGE_BUFFER_COUNT)) |
844 | return -EINVAL; | |
3e7ee490 | 845 | |
f4266e34 GKH |
846 | /* |
847 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
848 | * the largest size we support | |
849 | */ | |
850 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
851 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
852 | sizeof(u64)); | |
3e7ee490 | 853 | packetLen = descSize + BufferLen; |
59471438 | 854 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 855 | |
0ace247e | 856 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 857 | |
454f18a9 | 858 | /* Setup the descriptor */ |
3e7ee490 HJ |
859 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
860 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
861 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
862 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
863 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
864 | desc.RangeCount = 1; |
865 | ||
866 | desc.Range.Length = MultiPageBuffer->Length; | |
867 | desc.Range.Offset = MultiPageBuffer->Offset; | |
868 | ||
f4266e34 GKH |
869 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
870 | PfnCount * sizeof(u64)); | |
3e7ee490 | 871 | |
f4266e34 | 872 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
873 | sg_set_buf(&bufferList[0], &desc, descSize); |
874 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
875 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 876 | |
f4266e34 | 877 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 878 | |
454f18a9 | 879 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 880 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 881 | VmbusChannelSetEvent(Channel); |
3e7ee490 | 882 | |
3e7ee490 HJ |
883 | return ret; |
884 | } | |
885 | ||
c88c4e4c HJ |
886 | |
887 | /** | |
888 | * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel | |
889 | * @Channel: Pointer to vmbus_channel structure. | |
890 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
891 | * @BufferLen: Maximum size of what the the buffer will hold | |
892 | * @BufferActualLen: The actual size of the data after it was received | |
893 | * @RequestId: Identifier of the request | |
894 | * | |
895 | * Receives directly from the hyper-v vmbus and puts the data it received | |
896 | * into Buffer. This will receive the data unparsed from hyper-v. | |
897 | * | |
898 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 899 | */ |
f4266e34 GKH |
900 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
901 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 902 | { |
8dc0a06a | 903 | struct vmpacket_descriptor desc; |
4d643114 GKH |
904 | u32 packetLen; |
905 | u32 userLen; | |
3e7ee490 | 906 | int ret; |
54411c42 | 907 | unsigned long flags; |
3e7ee490 | 908 | |
3e7ee490 HJ |
909 | *BufferActualLen = 0; |
910 | *RequestId = 0; | |
911 | ||
54411c42 | 912 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 913 | |
f4266e34 GKH |
914 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
915 | sizeof(struct vmpacket_descriptor)); | |
916 | if (ret != 0) { | |
54411c42 | 917 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 918 | |
454f18a9 | 919 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
920 | return 0; |
921 | } | |
922 | ||
454f18a9 | 923 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
924 | |
925 | packetLen = desc.Length8 << 3; | |
926 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 927 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 928 | |
f4266e34 GKH |
929 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
930 | "flag %d tid %llx pktlen %d datalen %d> ", | |
931 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
932 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
933 | |
934 | *BufferActualLen = userLen; | |
935 | ||
f4266e34 | 936 | if (userLen > BufferLen) { |
54411c42 | 937 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 938 | |
f4266e34 GKH |
939 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
940 | BufferLen, userLen); | |
3e7ee490 HJ |
941 | return -1; |
942 | } | |
943 | ||
944 | *RequestId = desc.TransactionId; | |
945 | ||
454f18a9 | 946 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
947 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
948 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 949 | |
54411c42 | 950 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 951 | |
3e7ee490 HJ |
952 | return 0; |
953 | } | |
c88c4e4c | 954 | EXPORT_SYMBOL(VmbusChannelRecvPacket); |
3e7ee490 | 955 | |
3e189519 | 956 | /* |
f4266e34 GKH |
957 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel |
958 | */ | |
959 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
960 | u32 BufferLen, u32 *BufferActualLen, | |
961 | u64 *RequestId) | |
3e7ee490 | 962 | { |
8dc0a06a | 963 | struct vmpacket_descriptor desc; |
4d643114 GKH |
964 | u32 packetLen; |
965 | u32 userLen; | |
3e7ee490 | 966 | int ret; |
54411c42 | 967 | unsigned long flags; |
3e7ee490 | 968 | |
3e7ee490 HJ |
969 | *BufferActualLen = 0; |
970 | *RequestId = 0; | |
971 | ||
54411c42 | 972 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 973 | |
f4266e34 GKH |
974 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
975 | sizeof(struct vmpacket_descriptor)); | |
976 | if (ret != 0) { | |
54411c42 | 977 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 978 | |
454f18a9 | 979 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
980 | return 0; |
981 | } | |
982 | ||
454f18a9 | 983 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
984 | |
985 | packetLen = desc.Length8 << 3; | |
986 | userLen = packetLen - (desc.DataOffset8 << 3); | |
987 | ||
f4266e34 GKH |
988 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
989 | "flag %d tid %llx pktlen %d datalen %d> ", | |
990 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
991 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
992 | |
993 | *BufferActualLen = packetLen; | |
994 | ||
f4266e34 | 995 | if (packetLen > BufferLen) { |
54411c42 | 996 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 997 | |
f4266e34 GKH |
998 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
999 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
1000 | return -2; |
1001 | } | |
1002 | ||
1003 | *RequestId = desc.TransactionId; | |
1004 | ||
454f18a9 | 1005 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
1006 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
1007 | ||
54411c42 | 1008 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1009 | return 0; |
1010 | } | |
1011 | ||
3e189519 | 1012 | /* |
f4266e34 GKH |
1013 | * VmbusChannelOnChannelEvent - Channel event callback |
1014 | */ | |
aded7165 | 1015 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1016 | { |
1017 | DumpVmbusChannel(Channel); | |
0ace247e | 1018 | /* ASSERT(Channel->OnChannelCallback); */ |
5996b3dd | 1019 | |
3e7ee490 | 1020 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
5996b3dd HZ |
1021 | |
1022 | mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100)); | |
3e7ee490 HJ |
1023 | } |
1024 | ||
3e189519 | 1025 | /* |
f4266e34 GKH |
1026 | * VmbusChannelOnTimer - Timer event callback |
1027 | */ | |
46a05253 | 1028 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1029 | { |
aded7165 | 1030 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1031 | |
0fa37b1e | 1032 | if (channel->OnChannelCallback) |
3e7ee490 | 1033 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
1034 | } |
1035 | ||
3e189519 | 1036 | /* |
f4266e34 GKH |
1037 | * DumpVmbusChannel - Dump vmbus channel info to the console |
1038 | */ | |
aded7165 | 1039 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1040 | { |
1041 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1042 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1043 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1044 | } |