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