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; |
aded7165 | 178 | struct vmbus_channel_msginfo *openInfo; |
3e7ee490 | 179 | void *in, *out; |
dd0813b6 | 180 | unsigned long flags; |
f4266e34 | 181 | int ret; |
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); | |
221 | ||
222 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
223 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
224 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
225 | NewChannel->RingBufferGpadlHandle, | |
226 | NewChannel->Outbound.RingBuffer, | |
227 | NewChannel->Outbound.RingSize, | |
228 | NewChannel->Inbound.RingBuffer, | |
229 | NewChannel->Inbound.RingSize, | |
230 | SendRingBufferSize); | |
3e7ee490 | 231 | |
454f18a9 | 232 | /* Create and init the channel open message */ |
f4266e34 GKH |
233 | openInfo = kmalloc(sizeof(*openInfo) + |
234 | sizeof(struct vmbus_channel_open_channel), | |
235 | GFP_KERNEL); | |
3e7ee490 HJ |
236 | ASSERT(openInfo != NULL); |
237 | ||
bfc30aae | 238 | openInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 239 | |
82250213 | 240 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
241 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
242 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
243 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
244 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
245 | ASSERT(openMsg->RingBufferGpadlHandle); | |
246 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> | |
247 | PAGE_SHIFT; | |
248 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 HJ |
249 | |
250 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
251 | if (UserDataLen) | |
3e7ee490 | 252 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 253 | |
dd0813b6 | 254 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
255 | list_add_tail(&openInfo->MsgListEntry, |
256 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 257 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
258 | |
259 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
260 | ||
f4266e34 GKH |
261 | ret = VmbusPostMessage(openMsg, |
262 | sizeof(struct vmbus_channel_open_channel)); | |
263 | if (ret != 0) { | |
3e7ee490 HJ |
264 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
265 | goto Cleanup; | |
266 | } | |
267 | ||
454f18a9 | 268 | /* FIXME: Need to time-out here */ |
bfc30aae | 269 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
270 | |
271 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 272 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 273 | else |
f4266e34 GKH |
274 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
275 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
276 | |
277 | Cleanup: | |
dd0813b6 | 278 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 279 | list_del(&openInfo->MsgListEntry); |
dd0813b6 | 280 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 281 | |
420beac4 | 282 | kfree(openInfo->WaitEvent); |
8c69f52a | 283 | kfree(openInfo); |
3e7ee490 HJ |
284 | |
285 | DPRINT_EXIT(VMBUS); | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
3e189519 HJ |
290 | /* |
291 | * DumpGpadlBody - Dump the gpadl body message to the console for | |
292 | * debugging purposes. | |
f4266e34 | 293 | */ |
82250213 | 294 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 | 295 | { |
f4266e34 GKH |
296 | int i; |
297 | int pfnCount; | |
3e7ee490 | 298 | |
f4266e34 GKH |
299 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) / |
300 | sizeof(u64); | |
3e7ee490 HJ |
301 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
302 | ||
f4266e34 GKH |
303 | for (i = 0; i < pfnCount; i++) |
304 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", | |
305 | i, Gpadl->Pfn[i]); | |
3e7ee490 HJ |
306 | } |
307 | ||
3e189519 HJ |
308 | /* |
309 | * DumpGpadlHeader - Dump the gpadl header message to the console for | |
310 | * debugging purposes. | |
f4266e34 | 311 | */ |
82250213 | 312 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 | 313 | { |
f4266e34 GKH |
314 | int i, j; |
315 | int pageCount; | |
3e7ee490 | 316 | |
f4266e34 GKH |
317 | DPRINT_DBG(VMBUS, |
318 | "gpadl header - relid %d, range count %d, range buflen %d", | |
319 | Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen); | |
320 | for (i = 0; i < Gpadl->RangeCount; i++) { | |
3e7ee490 | 321 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
f4266e34 | 322 | pageCount = (pageCount > 26) ? 26 : pageCount; |
3e7ee490 | 323 | |
f4266e34 GKH |
324 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
325 | "page count %d", i, Gpadl->Range[i].ByteCount, | |
326 | Gpadl->Range[i].ByteOffset, pageCount); | |
3e7ee490 | 327 | |
f4266e34 GKH |
328 | for (j = 0; j < pageCount; j++) |
329 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, | |
330 | Gpadl->Range[i].PfnArray[j]); | |
3e7ee490 HJ |
331 | } |
332 | } | |
333 | ||
3e189519 | 334 | /* |
f4266e34 GKH |
335 | * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer |
336 | */ | |
337 | static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size, | |
338 | struct vmbus_channel_msginfo **MsgInfo, | |
339 | u32 *MessageCount) | |
3e7ee490 HJ |
340 | { |
341 | int i; | |
342 | int pageCount; | |
f4266e34 | 343 | unsigned long long pfn; |
82250213 GKH |
344 | struct vmbus_channel_gpadl_header *gpaHeader; |
345 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 GKH |
346 | struct vmbus_channel_msginfo *msgHeader; |
347 | struct vmbus_channel_msginfo *msgBody; | |
f4266e34 | 348 | u32 msgSize; |
3e7ee490 HJ |
349 | |
350 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
351 | ||
f4266e34 GKH |
352 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
353 | ASSERT((Size & (PAGE_SIZE-1)) == 0); | |
3e7ee490 HJ |
354 | |
355 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 356 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 357 | |
454f18a9 | 358 | /* do we need a gpadl body msg */ |
f4266e34 GKH |
359 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
360 | sizeof(struct vmbus_channel_gpadl_header) - | |
361 | sizeof(struct gpa_range); | |
59471438 | 362 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 363 | |
f4266e34 GKH |
364 | if (pageCount > pfnCount) { |
365 | /* we need a gpadl body */ | |
454f18a9 | 366 | /* fill in the header */ |
f4266e34 GKH |
367 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
368 | sizeof(struct vmbus_channel_gpadl_header) + | |
369 | sizeof(struct gpa_range) + pfnCount * sizeof(u64); | |
e276a3a5 | 370 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 | 371 | |
53af545b | 372 | INIT_LIST_HEAD(&msgHeader->SubMsgList); |
f4266e34 | 373 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 374 | |
82250213 | 375 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 376 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
377 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
378 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
379 | gpaHeader->Range[0].ByteOffset = 0; |
380 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 381 | for (i = 0; i < pfnCount; i++) |
3e7ee490 | 382 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
383 | *MsgInfo = msgHeader; |
384 | *MessageCount = 1; | |
385 | ||
386 | pfnSum = pfnCount; | |
387 | pfnLeft = pageCount - pfnCount; | |
388 | ||
454f18a9 | 389 | /* how many pfns can we fit */ |
f4266e34 GKH |
390 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
391 | sizeof(struct vmbus_channel_gpadl_body); | |
59471438 | 392 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 393 | |
454f18a9 | 394 | /* fill in the body */ |
f4266e34 | 395 | while (pfnLeft) { |
3e7ee490 | 396 | if (pfnLeft > pfnCount) |
3e7ee490 | 397 | pfnCurr = pfnCount; |
3e7ee490 | 398 | else |
3e7ee490 | 399 | pfnCurr = pfnLeft; |
3e7ee490 | 400 | |
f4266e34 GKH |
401 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
402 | sizeof(struct vmbus_channel_gpadl_body) + | |
403 | pfnCurr * sizeof(u64); | |
e276a3a5 | 404 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
405 | ASSERT(msgBody); |
406 | msgBody->MessageSize = msgSize; | |
407 | (*MessageCount)++; | |
f4266e34 GKH |
408 | gpadlBody = |
409 | (struct vmbus_channel_gpadl_body *)msgBody->Msg; | |
410 | ||
411 | /* | |
412 | * FIXME: | |
413 | * Gpadl is u32 and we are using a pointer which could | |
414 | * be 64-bit | |
415 | */ | |
454f18a9 | 416 | /* gpadlBody->Gpadl = kbuffer; */ |
f4266e34 | 417 | for (i = 0; i < pfnCurr; i++) |
3e7ee490 | 418 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
3e7ee490 | 419 | |
454f18a9 | 420 | /* add to msg header */ |
53af545b BP |
421 | list_add_tail(&msgBody->MsgListEntry, |
422 | &msgHeader->SubMsgList); | |
3e7ee490 HJ |
423 | pfnSum += pfnCurr; |
424 | pfnLeft -= pfnCurr; | |
425 | } | |
f4266e34 | 426 | } else { |
454f18a9 | 427 | /* everything fits in a header */ |
f4266e34 GKH |
428 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
429 | sizeof(struct vmbus_channel_gpadl_header) + | |
430 | sizeof(struct gpa_range) + pageCount * sizeof(u64); | |
e276a3a5 | 431 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
f4266e34 | 432 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 433 | |
82250213 | 434 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 435 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
436 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
437 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
438 | gpaHeader->Range[0].ByteOffset = 0; |
439 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 440 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 441 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
442 | |
443 | *MsgInfo = msgHeader; | |
444 | *MessageCount = 1; | |
445 | } | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
3e189519 | 450 | /* |
f4266e34 GKH |
451 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer |
452 | * | |
453 | * @Channel: a channel | |
454 | * @Kbuffer: from kmalloc | |
455 | * @Size: page-size multiple | |
456 | * @GpadlHandle: some funky thing | |
457 | */ | |
458 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
459 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 460 | { |
82250213 GKH |
461 | struct vmbus_channel_gpadl_header *gpadlMsg; |
462 | struct vmbus_channel_gpadl_body *gpadlBody; | |
463 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
aded7165 GKH |
464 | struct vmbus_channel_msginfo *msgInfo; |
465 | struct vmbus_channel_msginfo *subMsgInfo; | |
4d643114 | 466 | u32 msgCount; |
53af545b | 467 | struct list_head *curr; |
4d643114 | 468 | u32 nextGpadlHandle; |
dd0813b6 | 469 | unsigned long flags; |
f4266e34 | 470 | int ret; |
3e7ee490 HJ |
471 | |
472 | DPRINT_ENTER(VMBUS); | |
473 | ||
f4888417 BP |
474 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
475 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
476 | |
477 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
478 | ASSERT(msgInfo != NULL); | |
f4266e34 | 479 | ASSERT(msgCount > 0); |
3e7ee490 | 480 | |
bfc30aae | 481 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 482 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
483 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
484 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
485 | gpadlMsg->Gpadl = nextGpadlHandle; | |
486 | ||
487 | DumpGpadlHeader(gpadlMsg); | |
488 | ||
dd0813b6 | 489 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
490 | list_add_tail(&msgInfo->MsgListEntry, |
491 | &gVmbusConnection.ChannelMsgList); | |
3e7ee490 | 492 | |
53af545b | 493 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
494 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
495 | Kbuffer, Size, msgCount); | |
3e7ee490 | 496 | |
f4266e34 GKH |
497 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
498 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 499 | |
f4266e34 GKH |
500 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
501 | sizeof(*msgInfo)); | |
502 | if (ret != 0) { | |
3e7ee490 HJ |
503 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
504 | goto Cleanup; | |
505 | } | |
506 | ||
f4266e34 | 507 | if (msgCount > 1) { |
53af545b BP |
508 | list_for_each(curr, &msgInfo->SubMsgList) { |
509 | ||
510 | /* FIXME: should this use list_entry() instead ? */ | |
82250213 | 511 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
512 | gpadlBody = |
513 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
514 | |
515 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
516 | gpadlBody->Gpadl = nextGpadlHandle; | |
517 | ||
f4266e34 GKH |
518 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
519 | subMsgInfo->MessageSize - | |
520 | sizeof(*subMsgInfo)); | |
3e7ee490 | 521 | |
f4266e34 GKH |
522 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
523 | sizeof(*subMsgInfo)); | |
524 | ret = VmbusPostMessage(gpadlBody, | |
525 | subMsgInfo->MessageSize - | |
526 | sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
527 | ASSERT(ret == 0); |
528 | } | |
529 | } | |
bfc30aae | 530 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 531 | |
454f18a9 | 532 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
533 | DPRINT_DBG(VMBUS, "Received GPADL created " |
534 | "(relid %d, status %d handle %x)", | |
535 | Channel->OfferMsg.ChildRelId, | |
536 | msgInfo->Response.GpadlCreated.CreationStatus, | |
537 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
538 | |
539 | *GpadlHandle = gpadlMsg->Gpadl; | |
540 | ||
541 | Cleanup: | |
dd0813b6 | 542 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 543 | list_del(&msgInfo->MsgListEntry); |
dd0813b6 | 544 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 545 | |
420beac4 | 546 | kfree(msgInfo->WaitEvent); |
8c69f52a | 547 | kfree(msgInfo); |
3e7ee490 HJ |
548 | |
549 | DPRINT_EXIT(VMBUS); | |
550 | ||
551 | return ret; | |
552 | } | |
553 | ||
3e189519 | 554 | /* |
f4266e34 GKH |
555 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle |
556 | */ | |
aded7165 | 557 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 558 | { |
82250213 | 559 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 560 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 561 | unsigned long flags; |
f4266e34 | 562 | int ret; |
3e7ee490 HJ |
563 | |
564 | DPRINT_ENTER(VMBUS); | |
565 | ||
566 | ASSERT(GpadlHandle != 0); | |
567 | ||
f4266e34 GKH |
568 | info = kmalloc(sizeof(*info) + |
569 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
3e7ee490 HJ |
570 | ASSERT(info != NULL); |
571 | ||
bfc30aae | 572 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 573 | |
82250213 | 574 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
575 | |
576 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
577 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
578 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 579 | |
dd0813b6 | 580 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
581 | list_add_tail(&info->MsgListEntry, |
582 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 583 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 584 | |
f4266e34 GKH |
585 | ret = VmbusPostMessage(msg, |
586 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
587 | if (ret != 0) { | |
454f18a9 | 588 | /* TODO: */ |
f4266e34 | 589 | /* something... */ |
3e7ee490 HJ |
590 | } |
591 | ||
bfc30aae | 592 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 593 | |
454f18a9 | 594 | /* Received a torndown response */ |
dd0813b6 | 595 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 596 | list_del(&info->MsgListEntry); |
dd0813b6 | 597 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 598 | |
420beac4 | 599 | kfree(info->WaitEvent); |
8c69f52a | 600 | kfree(info); |
3e7ee490 HJ |
601 | |
602 | DPRINT_EXIT(VMBUS); | |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
3e189519 | 607 | /* |
f4266e34 GKH |
608 | * VmbusChannelClose - Close the specified channel |
609 | */ | |
aded7165 | 610 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 611 | { |
82250213 | 612 | struct vmbus_channel_close_channel *msg; |
aded7165 | 613 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 614 | unsigned long flags; |
f4266e34 | 615 | int ret; |
3e7ee490 HJ |
616 | |
617 | DPRINT_ENTER(VMBUS); | |
618 | ||
454f18a9 | 619 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 620 | Channel->OnChannelCallback = NULL; |
5996b3dd | 621 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 622 | |
454f18a9 | 623 | /* Send a closing message */ |
f4266e34 GKH |
624 | info = kmalloc(sizeof(*info) + |
625 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
3e7ee490 HJ |
626 | ASSERT(info != NULL); |
627 | ||
bfc30aae | 628 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 629 | |
82250213 | 630 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
631 | msg->Header.MessageType = ChannelMessageCloseChannel; |
632 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 633 | |
82250213 | 634 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 635 | if (ret != 0) { |
454f18a9 | 636 | /* TODO: */ |
f4266e34 | 637 | /* something... */ |
3e7ee490 HJ |
638 | } |
639 | ||
454f18a9 | 640 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 641 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
642 | VmbusChannelTeardownGpadl(Channel, |
643 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 644 | |
454f18a9 | 645 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 646 | |
454f18a9 | 647 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
648 | RingBufferCleanup(&Channel->Outbound); |
649 | RingBufferCleanup(&Channel->Inbound); | |
650 | ||
bfc30aae | 651 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 652 | |
8c69f52a | 653 | kfree(info); |
3e7ee490 | 654 | |
454f18a9 BP |
655 | /* |
656 | * If we are closing the channel during an error path in | |
657 | * opening the channel, don't free the channel since the | |
658 | * caller will free the channel | |
659 | */ | |
660 | ||
f4266e34 | 661 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 662 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 663 | list_del(&Channel->ListEntry); |
0f5e44ca | 664 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
665 | |
666 | FreeVmbusChannel(Channel); | |
667 | } | |
668 | ||
669 | DPRINT_EXIT(VMBUS); | |
670 | } | |
671 | ||
c88c4e4c HJ |
672 | /** |
673 | * VmbusChannelSendPacket() - Send the specified buffer on the given channel | |
674 | * @Channel: Pointer to vmbus_channel structure. | |
675 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
676 | * @BufferLen: Maximum size of what the the buffer will hold | |
677 | * @RequestId: Identifier of the request | |
678 | * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time | |
679 | * packet etc. | |
680 | * | |
681 | * Sends data in @Buffer directly to hyper-v via the vmbus | |
682 | * This will send the data unparsed to hyper-v. | |
683 | * | |
684 | * Mainly used by Hyper-V drivers. | |
f4266e34 GKH |
685 | */ |
686 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
687 | u32 BufferLen, u64 RequestId, | |
688 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 689 | { |
8dc0a06a GKH |
690 | struct vmpacket_descriptor desc; |
691 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 692 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 693 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
694 | u64 alignedData = 0; |
695 | int ret; | |
3e7ee490 HJ |
696 | |
697 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
698 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
699 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
700 | |
701 | DumpVmbusChannel(Channel); | |
702 | ||
59471438 | 703 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 704 | |
454f18a9 BP |
705 | /* Setup the descriptor */ |
706 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
707 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
708 | /* in 8-bytes granularity */ |
709 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
710 | desc.Length8 = (u16)(packetLenAligned >> 3); |
711 | desc.TransactionId = RequestId; | |
3e7ee490 | 712 | |
f4266e34 | 713 | sg_init_table(bufferList, 3); |
8dc0a06a | 714 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
715 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
716 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 717 | |
f4266e34 | 718 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 719 | |
454f18a9 | 720 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 721 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 722 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
723 | |
724 | DPRINT_EXIT(VMBUS); | |
725 | ||
726 | return ret; | |
727 | } | |
c88c4e4c | 728 | EXPORT_SYMBOL(VmbusChannelSendPacket); |
3e7ee490 | 729 | |
3e189519 HJ |
730 | /* |
731 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer | |
732 | * packets using a GPADL Direct packet type. | |
f4266e34 | 733 | */ |
aded7165 | 734 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
735 | struct hv_page_buffer PageBuffers[], |
736 | u32 PageCount, void *Buffer, u32 BufferLen, | |
737 | u64 RequestId) | |
3e7ee490 | 738 | { |
f4266e34 GKH |
739 | int ret; |
740 | int i; | |
0cf4fa80 | 741 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
742 | u32 descSize; |
743 | u32 packetLen; | |
744 | u32 packetLenAligned; | |
b219b3f7 | 745 | struct scatterlist bufferList[3]; |
f4266e34 | 746 | u64 alignedData = 0; |
3e7ee490 HJ |
747 | |
748 | DPRINT_ENTER(VMBUS); | |
749 | ||
750 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
751 | ||
752 | DumpVmbusChannel(Channel); | |
753 | ||
f4266e34 GKH |
754 | /* |
755 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
756 | * largest size we support | |
757 | */ | |
758 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
759 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
760 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 761 | packetLen = descSize + BufferLen; |
59471438 | 762 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 763 | |
59471438 | 764 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 765 | |
454f18a9 | 766 | /* Setup the descriptor */ |
3e7ee490 HJ |
767 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
768 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
769 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
770 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
771 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
772 | desc.RangeCount = PageCount; |
773 | ||
f4266e34 | 774 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
775 | desc.Range[i].Length = PageBuffers[i].Length; |
776 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
777 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
778 | } | |
779 | ||
f4266e34 | 780 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
781 | sg_set_buf(&bufferList[0], &desc, descSize); |
782 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
783 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 784 | |
f4266e34 | 785 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 786 | |
454f18a9 | 787 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 788 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 789 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
790 | |
791 | DPRINT_EXIT(VMBUS); | |
792 | ||
793 | return ret; | |
794 | } | |
795 | ||
3e189519 HJ |
796 | /* |
797 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet | |
798 | * using a GPADL Direct packet type. | |
f4266e34 | 799 | */ |
aded7165 | 800 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
801 | struct hv_multipage_buffer *MultiPageBuffer, |
802 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 803 | { |
f4266e34 | 804 | int ret; |
3fcc523a | 805 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
806 | u32 descSize; |
807 | u32 packetLen; | |
808 | u32 packetLenAligned; | |
b219b3f7 | 809 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
810 | u64 alignedData = 0; |
811 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
812 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
813 | |
814 | DPRINT_ENTER(VMBUS); | |
815 | ||
816 | DumpVmbusChannel(Channel); | |
817 | ||
f4266e34 GKH |
818 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
819 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 HJ |
820 | |
821 | ASSERT(PfnCount > 0); | |
822 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
823 | ||
f4266e34 GKH |
824 | /* |
825 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
826 | * the largest size we support | |
827 | */ | |
828 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
829 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
830 | sizeof(u64)); | |
3e7ee490 | 831 | packetLen = descSize + BufferLen; |
59471438 | 832 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 833 | |
59471438 | 834 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 835 | |
454f18a9 | 836 | /* Setup the descriptor */ |
3e7ee490 HJ |
837 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
838 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
839 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
840 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
841 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
842 | desc.RangeCount = 1; |
843 | ||
844 | desc.Range.Length = MultiPageBuffer->Length; | |
845 | desc.Range.Offset = MultiPageBuffer->Offset; | |
846 | ||
f4266e34 GKH |
847 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
848 | PfnCount * sizeof(u64)); | |
3e7ee490 | 849 | |
f4266e34 | 850 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
851 | sg_set_buf(&bufferList[0], &desc, descSize); |
852 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
853 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 854 | |
f4266e34 | 855 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 856 | |
454f18a9 | 857 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 858 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 859 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
860 | |
861 | DPRINT_EXIT(VMBUS); | |
862 | ||
863 | return ret; | |
864 | } | |
865 | ||
c88c4e4c HJ |
866 | |
867 | /** | |
868 | * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel | |
869 | * @Channel: Pointer to vmbus_channel structure. | |
870 | * @Buffer: Pointer to the buffer you want to receive the data into. | |
871 | * @BufferLen: Maximum size of what the the buffer will hold | |
872 | * @BufferActualLen: The actual size of the data after it was received | |
873 | * @RequestId: Identifier of the request | |
874 | * | |
875 | * Receives directly from the hyper-v vmbus and puts the data it received | |
876 | * into Buffer. This will receive the data unparsed from hyper-v. | |
877 | * | |
878 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 879 | */ |
f4266e34 GKH |
880 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
881 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 882 | { |
8dc0a06a | 883 | struct vmpacket_descriptor desc; |
4d643114 GKH |
884 | u32 packetLen; |
885 | u32 userLen; | |
3e7ee490 | 886 | int ret; |
54411c42 | 887 | unsigned long flags; |
3e7ee490 HJ |
888 | |
889 | DPRINT_ENTER(VMBUS); | |
890 | ||
891 | *BufferActualLen = 0; | |
892 | *RequestId = 0; | |
893 | ||
54411c42 | 894 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 895 | |
f4266e34 GKH |
896 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
897 | sizeof(struct vmpacket_descriptor)); | |
898 | if (ret != 0) { | |
54411c42 | 899 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 900 | |
454f18a9 | 901 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
902 | DPRINT_EXIT(VMBUS); |
903 | return 0; | |
904 | } | |
905 | ||
454f18a9 | 906 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
907 | |
908 | packetLen = desc.Length8 << 3; | |
909 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 910 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 911 | |
f4266e34 GKH |
912 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
913 | "flag %d tid %llx pktlen %d datalen %d> ", | |
914 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
915 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
916 | |
917 | *BufferActualLen = userLen; | |
918 | ||
f4266e34 | 919 | if (userLen > BufferLen) { |
54411c42 | 920 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 921 | |
f4266e34 GKH |
922 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
923 | BufferLen, userLen); | |
3e7ee490 HJ |
924 | DPRINT_EXIT(VMBUS); |
925 | ||
926 | return -1; | |
927 | } | |
928 | ||
929 | *RequestId = desc.TransactionId; | |
930 | ||
454f18a9 | 931 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
932 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
933 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 934 | |
54411c42 | 935 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
936 | |
937 | DPRINT_EXIT(VMBUS); | |
938 | ||
939 | return 0; | |
940 | } | |
c88c4e4c | 941 | EXPORT_SYMBOL(VmbusChannelRecvPacket); |
3e7ee490 | 942 | |
3e189519 | 943 | /* |
f4266e34 GKH |
944 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel |
945 | */ | |
946 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
947 | u32 BufferLen, u32 *BufferActualLen, | |
948 | u64 *RequestId) | |
3e7ee490 | 949 | { |
8dc0a06a | 950 | struct vmpacket_descriptor desc; |
4d643114 GKH |
951 | u32 packetLen; |
952 | u32 userLen; | |
3e7ee490 | 953 | int ret; |
54411c42 | 954 | unsigned long flags; |
3e7ee490 HJ |
955 | |
956 | DPRINT_ENTER(VMBUS); | |
957 | ||
958 | *BufferActualLen = 0; | |
959 | *RequestId = 0; | |
960 | ||
54411c42 | 961 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 962 | |
f4266e34 GKH |
963 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
964 | sizeof(struct vmpacket_descriptor)); | |
965 | if (ret != 0) { | |
54411c42 | 966 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 967 | |
454f18a9 | 968 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
969 | DPRINT_EXIT(VMBUS); |
970 | return 0; | |
971 | } | |
972 | ||
454f18a9 | 973 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
974 | |
975 | packetLen = desc.Length8 << 3; | |
976 | userLen = packetLen - (desc.DataOffset8 << 3); | |
977 | ||
f4266e34 GKH |
978 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
979 | "flag %d tid %llx pktlen %d datalen %d> ", | |
980 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
981 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
982 | |
983 | *BufferActualLen = packetLen; | |
984 | ||
f4266e34 | 985 | if (packetLen > BufferLen) { |
54411c42 | 986 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 987 | |
f4266e34 GKH |
988 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
989 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
990 | DPRINT_EXIT(VMBUS); |
991 | return -2; | |
992 | } | |
993 | ||
994 | *RequestId = desc.TransactionId; | |
995 | ||
454f18a9 | 996 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
997 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
998 | ||
54411c42 | 999 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
1000 | |
1001 | DPRINT_EXIT(VMBUS); | |
1002 | ||
1003 | return 0; | |
1004 | } | |
1005 | ||
3e189519 | 1006 | /* |
f4266e34 GKH |
1007 | * VmbusChannelOnChannelEvent - Channel event callback |
1008 | */ | |
aded7165 | 1009 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1010 | { |
1011 | DumpVmbusChannel(Channel); | |
1012 | ASSERT(Channel->OnChannelCallback); | |
5996b3dd | 1013 | |
3e7ee490 | 1014 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
5996b3dd HZ |
1015 | |
1016 | mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100)); | |
3e7ee490 HJ |
1017 | } |
1018 | ||
3e189519 | 1019 | /* |
f4266e34 GKH |
1020 | * VmbusChannelOnTimer - Timer event callback |
1021 | */ | |
46a05253 | 1022 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 1023 | { |
aded7165 | 1024 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1025 | |
0fa37b1e | 1026 | if (channel->OnChannelCallback) |
3e7ee490 | 1027 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
1028 | } |
1029 | ||
3e189519 | 1030 | /* |
f4266e34 GKH |
1031 | * DumpVmbusChannel - Dump vmbus channel info to the console |
1032 | */ | |
aded7165 | 1033 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1034 | { |
1035 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1036 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1037 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1038 | } |