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 */ |
fff41b2e | 30 | static int create_gpadl_header( |
39d70a4a HZ |
31 | void *kbuffer, /* must be phys and virt contiguous */ |
32 | u32 size, /* page-size multiple */ | |
33 | struct vmbus_channel_msginfo **msginfo, | |
34 | u32 *messagecount); | |
fff41b2e HZ |
35 | static void dump_vmbus_channel(struct vmbus_channel *channel); |
36 | static void vmbus_setevent(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 | 69 | /* |
fff41b2e | 70 | * vmbus_setevent- Trigger an event notification on the specified |
3e189519 | 71 | * channel. |
f4266e34 | 72 | */ |
fff41b2e | 73 | static void vmbus_setevent(struct vmbus_channel *channel) |
3e7ee490 | 74 | { |
39d70a4a | 75 | struct hv_monitor_page *monitorpage; |
3e7ee490 | 76 | |
39d70a4a | 77 | if (channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 78 | /* Each u32 represents 32 channels */ |
39d70a4a | 79 | set_bit(channel->OfferMsg.ChildRelId & 31, |
7c369f40 | 80 | (unsigned long *) gVmbusConnection.SendInterruptPage + |
39d70a4a | 81 | (channel->OfferMsg.ChildRelId >> 5)); |
3e7ee490 | 82 | |
39d70a4a HZ |
83 | monitorpage = gVmbusConnection.MonitorPages; |
84 | monitorpage++; /* Get the child to parent monitor page */ | |
3e7ee490 | 85 | |
39d70a4a HZ |
86 | set_bit(channel->MonitorBit, |
87 | (unsigned long *)&monitorpage->TriggerGroup | |
88 | [channel->MonitorGroup].Pending); | |
7c369f40 | 89 | |
f4266e34 | 90 | } else { |
39d70a4a | 91 | VmbusSetEvent(channel->OfferMsg.ChildRelId); |
3e7ee490 | 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 | /* |
fff41b2e | 118 | * vmbus_get_debug_info -Retrieve various channel debug info |
f4266e34 | 119 | */ |
fff41b2e | 120 | void vmbus_get_debug_info(struct vmbus_channel *channel, |
39d70a4a | 121 | struct vmbus_channel_debug_info *debuginfo) |
3e7ee490 | 122 | { |
39d70a4a HZ |
123 | struct hv_monitor_page *monitorpage; |
124 | u8 monitor_group = (u8)channel->OfferMsg.MonitorId / 32; | |
125 | u8 monitor_offset = (u8)channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 126 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 | 127 | |
39d70a4a HZ |
128 | debuginfo->RelId = channel->OfferMsg.ChildRelId; |
129 | debuginfo->State = channel->State; | |
130 | memcpy(&debuginfo->InterfaceType, | |
131 | &channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); | |
132 | memcpy(&debuginfo->InterfaceInstance, | |
133 | &channel->OfferMsg.Offer.InterfaceInstance, | |
f4266e34 | 134 | sizeof(struct hv_guid)); |
3e7ee490 | 135 | |
39d70a4a | 136 | monitorpage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 | 137 | |
39d70a4a | 138 | debuginfo->MonitorId = channel->OfferMsg.MonitorId; |
3e7ee490 | 139 | |
39d70a4a HZ |
140 | debuginfo->ServerMonitorPending = |
141 | monitorpage->TriggerGroup[monitor_group].Pending; | |
142 | debuginfo->ServerMonitorLatency = | |
143 | monitorpage->Latency[monitor_group][monitor_offset]; | |
144 | debuginfo->ServerMonitorConnectionId = | |
145 | monitorpage->Parameter[monitor_group] | |
146 | [monitor_offset].ConnectionId.u.Id; | |
3e7ee490 | 147 | |
39d70a4a | 148 | monitorpage++; |
3e7ee490 | 149 | |
39d70a4a HZ |
150 | debuginfo->ClientMonitorPending = |
151 | monitorpage->TriggerGroup[monitor_group].Pending; | |
152 | debuginfo->ClientMonitorLatency = | |
153 | monitorpage->Latency[monitor_group][monitor_offset]; | |
154 | debuginfo->ClientMonitorConnectionId = | |
155 | monitorpage->Parameter[monitor_group] | |
156 | [monitor_offset].ConnectionId.u.Id; | |
3e7ee490 | 157 | |
39d70a4a HZ |
158 | RingBufferGetDebugInfo(&channel->Inbound, &debuginfo->Inbound); |
159 | RingBufferGetDebugInfo(&channel->Outbound, &debuginfo->Outbound); | |
3e7ee490 HJ |
160 | } |
161 | ||
3e189519 | 162 | /* |
fff41b2e | 163 | * vmbus_open - Open the specified channel. |
f4266e34 | 164 | */ |
fff41b2e | 165 | int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, |
39d70a4a HZ |
166 | u32 recv_ringbuffer_size, void *userdata, u32 userdatalen, |
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 | |
39d70a4a HZ |
179 | newchannel->OnChannelCallback = onchannelcallback; |
180 | newchannel->ChannelCallbackContext = context; | |
3e7ee490 | 181 | |
454f18a9 | 182 | /* Allocate the ring buffer */ |
39d70a4a | 183 | out = osd_PageAlloc((send_ringbuffer_size + recv_ringbuffer_size) |
f4266e34 | 184 | >> PAGE_SHIFT); |
7e052d98 BP |
185 | if (!out) |
186 | return -ENOMEM; | |
187 | ||
0ace247e | 188 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 189 | |
39d70a4a | 190 | in = (void *)((unsigned long)out + send_ringbuffer_size); |
3e7ee490 | 191 | |
39d70a4a HZ |
192 | newchannel->RingBufferPages = out; |
193 | newchannel->RingBufferPageCount = (send_ringbuffer_size + | |
194 | recv_ringbuffer_size) >> PAGE_SHIFT; | |
3e7ee490 | 195 | |
39d70a4a | 196 | ret = RingBufferInit(&newchannel->Outbound, out, send_ringbuffer_size); |
fd4dc88e | 197 | if (ret != 0) { |
3324fb40 BP |
198 | err = ret; |
199 | goto errorout; | |
200 | } | |
201 | ||
39d70a4a | 202 | ret = RingBufferInit(&newchannel->Inbound, in, recv_ringbuffer_size); |
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 | 210 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
39d70a4a | 211 | newchannel); |
3e7ee490 | 212 | |
39d70a4a | 213 | newchannel->RingBufferGpadlHandle = 0; |
3e7ee490 | 214 | |
fff41b2e | 215 | ret = vmbus_establish_gpadl(newchannel, |
39d70a4a HZ |
216 | newchannel->Outbound.RingBuffer, |
217 | send_ringbuffer_size + | |
218 | recv_ringbuffer_size, | |
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>", | |
39d70a4a HZ |
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 | send_ringbuffer_size); | |
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 | 252 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
39d70a4a HZ |
253 | openMsg->OpenId = newchannel->OfferMsg.ChildRelId; /* FIXME */ |
254 | openMsg->ChildRelId = newchannel->OfferMsg.ChildRelId; | |
255 | openMsg->RingBufferGpadlHandle = newchannel->RingBufferGpadlHandle; | |
256 | openMsg->DownstreamRingBufferPageOffset = send_ringbuffer_size >> | |
f4266e34 GKH |
257 | PAGE_SHIFT; |
258 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 | 259 | |
39d70a4a | 260 | if (userdatalen > MAX_USER_DEFINED_BYTES) { |
c827f944 BP |
261 | err = -EINVAL; |
262 | goto errorout; | |
263 | } | |
264 | ||
39d70a4a HZ |
265 | if (userdatalen) |
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) | |
39d70a4a | 286 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", newchannel); |
3e7ee490 | 287 | else |
f4266e34 | 288 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
39d70a4a | 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: | |
39d70a4a HZ |
301 | RingBufferCleanup(&newchannel->Outbound); |
302 | RingBufferCleanup(&newchannel->Inbound); | |
303 | osd_PageFree(out, (send_ringbuffer_size + recv_ringbuffer_size) | |
c3bf2e26 BP |
304 | >> PAGE_SHIFT); |
305 | kfree(openInfo); | |
306 | return err; | |
3e7ee490 HJ |
307 | } |
308 | ||
3e189519 | 309 | /* |
fff41b2e | 310 | * dump_gpadl_body - Dump the gpadl body message to the console for |
3e189519 | 311 | * debugging purposes. |
f4266e34 | 312 | */ |
fff41b2e | 313 | static void dump_gpadl_body(struct vmbus_channel_gpadl_body *gpadl, u32 len) |
3e7ee490 | 314 | { |
f4266e34 | 315 | int i; |
39d70a4a | 316 | int pfncount; |
3e7ee490 | 317 | |
39d70a4a | 318 | pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) / |
f4266e34 | 319 | sizeof(u64); |
39d70a4a | 320 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount); |
3e7ee490 | 321 | |
39d70a4a | 322 | for (i = 0; i < pfncount; i++) |
f4266e34 | 323 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", |
39d70a4a | 324 | i, gpadl->Pfn[i]); |
3e7ee490 HJ |
325 | } |
326 | ||
3e189519 | 327 | /* |
fff41b2e | 328 | * dump_gpadl_header - Dump the gpadl header message to the console for |
3e189519 | 329 | * debugging purposes. |
f4266e34 | 330 | */ |
fff41b2e | 331 | static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl) |
3e7ee490 | 332 | { |
f4266e34 | 333 | int i, j; |
39d70a4a | 334 | int pagecount; |
3e7ee490 | 335 | |
f4266e34 GKH |
336 | DPRINT_DBG(VMBUS, |
337 | "gpadl header - relid %d, range count %d, range buflen %d", | |
39d70a4a HZ |
338 | gpadl->ChildRelId, gpadl->RangeCount, gpadl->RangeBufLen); |
339 | for (i = 0; i < gpadl->RangeCount; i++) { | |
340 | pagecount = gpadl->Range[i].ByteCount >> PAGE_SHIFT; | |
341 | pagecount = (pagecount > 26) ? 26 : pagecount; | |
3e7ee490 | 342 | |
f4266e34 | 343 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
39d70a4a HZ |
344 | "page count %d", i, gpadl->Range[i].ByteCount, |
345 | gpadl->Range[i].ByteOffset, pagecount); | |
3e7ee490 | 346 | |
39d70a4a | 347 | for (j = 0; j < pagecount; j++) |
f4266e34 | 348 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, |
39d70a4a | 349 | gpadl->Range[i].PfnArray[j]); |
3e7ee490 HJ |
350 | } |
351 | } | |
352 | ||
3e189519 | 353 | /* |
fff41b2e | 354 | * create_gpadl_header - Creates a gpadl for the specified buffer |
f4266e34 | 355 | */ |
fff41b2e | 356 | static int create_gpadl_header(void *kbuffer, u32 size, |
39d70a4a HZ |
357 | struct vmbus_channel_msginfo **msginfo, |
358 | u32 *messagecount) | |
3e7ee490 HJ |
359 | { |
360 | int i; | |
39d70a4a | 361 | int pagecount; |
f4266e34 | 362 | unsigned long long pfn; |
39d70a4a HZ |
363 | struct vmbus_channel_gpadl_header *gpadl_header; |
364 | struct vmbus_channel_gpadl_body *gpadl_body; | |
365 | struct vmbus_channel_msginfo *msgheader; | |
366 | struct vmbus_channel_msginfo *msgbody = NULL; | |
367 | u32 msgsize; | |
3e7ee490 | 368 | |
39d70a4a | 369 | int pfnsum, pfncount, pfnleft, pfncurr, pfnsize; |
3e7ee490 | 370 | |
f4266e34 | 371 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
0ace247e | 372 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
3e7ee490 | 373 | |
39d70a4a HZ |
374 | pagecount = size >> PAGE_SHIFT; |
375 | pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT; | |
3e7ee490 | 376 | |
454f18a9 | 377 | /* do we need a gpadl body msg */ |
39d70a4a | 378 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 GKH |
379 | sizeof(struct vmbus_channel_gpadl_header) - |
380 | sizeof(struct gpa_range); | |
39d70a4a | 381 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 382 | |
39d70a4a | 383 | if (pagecount > pfncount) { |
f4266e34 | 384 | /* we need a gpadl body */ |
454f18a9 | 385 | /* fill in the header */ |
39d70a4a | 386 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 387 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
388 | sizeof(struct gpa_range) + pfncount * sizeof(u64); |
389 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
390 | if (!msgheader) | |
d1c250bb | 391 | goto nomem; |
3e7ee490 | 392 | |
39d70a4a HZ |
393 | INIT_LIST_HEAD(&msgheader->SubMsgList); |
394 | msgheader->MessageSize = msgsize; | |
3e7ee490 | 395 | |
39d70a4a HZ |
396 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
397 | msgheader->Msg; | |
398 | gpadl_header->RangeCount = 1; | |
399 | gpadl_header->RangeBufLen = sizeof(struct gpa_range) + | |
400 | pagecount * sizeof(u64); | |
401 | gpadl_header->Range[0].ByteOffset = 0; | |
402 | gpadl_header->Range[0].ByteCount = size; | |
403 | for (i = 0; i < pfncount; i++) | |
404 | gpadl_header->Range[0].PfnArray[i] = pfn+i; | |
405 | *msginfo = msgheader; | |
406 | *messagecount = 1; | |
3e7ee490 | 407 | |
39d70a4a HZ |
408 | pfnsum = pfncount; |
409 | pfnleft = pagecount - pfncount; | |
3e7ee490 | 410 | |
454f18a9 | 411 | /* how many pfns can we fit */ |
39d70a4a | 412 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
f4266e34 | 413 | sizeof(struct vmbus_channel_gpadl_body); |
39d70a4a | 414 | pfncount = pfnsize / sizeof(u64); |
3e7ee490 | 415 | |
454f18a9 | 416 | /* fill in the body */ |
39d70a4a HZ |
417 | while (pfnleft) { |
418 | if (pfnleft > pfncount) | |
419 | pfncurr = pfncount; | |
3e7ee490 | 420 | else |
39d70a4a | 421 | pfncurr = pfnleft; |
3e7ee490 | 422 | |
39d70a4a | 423 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 424 | sizeof(struct vmbus_channel_gpadl_body) + |
39d70a4a HZ |
425 | pfncurr * sizeof(u64); |
426 | msgbody = kzalloc(msgsize, GFP_KERNEL); | |
d1c250bb | 427 | /* FIXME: we probably need to more if this fails */ |
39d70a4a | 428 | if (!msgbody) |
d1c250bb | 429 | goto nomem; |
39d70a4a HZ |
430 | msgbody->MessageSize = msgsize; |
431 | (*messagecount)++; | |
432 | gpadl_body = | |
433 | (struct vmbus_channel_gpadl_body *)msgbody->Msg; | |
f4266e34 GKH |
434 | |
435 | /* | |
436 | * FIXME: | |
437 | * Gpadl is u32 and we are using a pointer which could | |
438 | * be 64-bit | |
439 | */ | |
39d70a4a HZ |
440 | /* gpadl_body->Gpadl = kbuffer; */ |
441 | for (i = 0; i < pfncurr; i++) | |
442 | gpadl_body->Pfn[i] = pfn + pfnsum + i; | |
3e7ee490 | 443 | |
454f18a9 | 444 | /* add to msg header */ |
39d70a4a HZ |
445 | list_add_tail(&msgbody->MsgListEntry, |
446 | &msgheader->SubMsgList); | |
447 | pfnsum += pfncurr; | |
448 | pfnleft -= pfncurr; | |
3e7ee490 | 449 | } |
f4266e34 | 450 | } else { |
454f18a9 | 451 | /* everything fits in a header */ |
39d70a4a | 452 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
f4266e34 | 453 | sizeof(struct vmbus_channel_gpadl_header) + |
39d70a4a HZ |
454 | sizeof(struct gpa_range) + pagecount * sizeof(u64); |
455 | msgheader = kzalloc(msgsize, GFP_KERNEL); | |
456 | if (msgheader == NULL) | |
e3eb7cdd | 457 | goto nomem; |
39d70a4a HZ |
458 | msgheader->MessageSize = msgsize; |
459 | ||
460 | gpadl_header = (struct vmbus_channel_gpadl_header *) | |
461 | msgheader->Msg; | |
462 | gpadl_header->RangeCount = 1; | |
463 | gpadl_header->RangeBufLen = sizeof(struct gpa_range) + | |
464 | pagecount * sizeof(u64); | |
465 | gpadl_header->Range[0].ByteOffset = 0; | |
466 | gpadl_header->Range[0].ByteCount = size; | |
467 | for (i = 0; i < pagecount; i++) | |
468 | gpadl_header->Range[0].PfnArray[i] = pfn+i; | |
469 | ||
470 | *msginfo = msgheader; | |
471 | *messagecount = 1; | |
3e7ee490 HJ |
472 | } |
473 | ||
474 | return 0; | |
d1c250bb | 475 | nomem: |
39d70a4a HZ |
476 | kfree(msgheader); |
477 | kfree(msgbody); | |
d1c250bb | 478 | return -ENOMEM; |
3e7ee490 HJ |
479 | } |
480 | ||
3e189519 | 481 | /* |
fff41b2e | 482 | * vmbus_establish_gpadl - Estabish a GPADL for the specified buffer |
f4266e34 | 483 | * |
39d70a4a HZ |
484 | * @channel: a channel |
485 | * @kbuffer: from kmalloc | |
486 | * @size: page-size multiple | |
487 | * @gpadl_handle: some funky thing | |
f4266e34 | 488 | */ |
fff41b2e | 489 | int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, |
39d70a4a | 490 | u32 size, u32 *gpadl_handle) |
3e7ee490 | 491 | { |
39d70a4a HZ |
492 | struct vmbus_channel_gpadl_header *gpadlmsg; |
493 | struct vmbus_channel_gpadl_body *gpadl_body; | |
82250213 | 494 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ |
39d70a4a HZ |
495 | struct vmbus_channel_msginfo *msginfo = NULL; |
496 | struct vmbus_channel_msginfo *submsginfo; | |
497 | u32 msgcount; | |
53af545b | 498 | struct list_head *curr; |
39d70a4a | 499 | u32 next_gpadl_handle; |
dd0813b6 | 500 | unsigned long flags; |
c3bf2e26 | 501 | int ret = 0; |
3e7ee490 | 502 | |
39d70a4a | 503 | next_gpadl_handle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
f4888417 | 504 | atomic_inc(&gVmbusConnection.NextGpadlHandle); |
3e7ee490 | 505 | |
fff41b2e | 506 | ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount); |
c3bf2e26 BP |
507 | if (ret) |
508 | return ret; | |
3e7ee490 | 509 | |
39d70a4a HZ |
510 | msginfo->WaitEvent = osd_WaitEventCreate(); |
511 | if (!msginfo->WaitEvent) { | |
c3bf2e26 BP |
512 | ret = -ENOMEM; |
513 | goto Cleanup; | |
514 | } | |
515 | ||
39d70a4a HZ |
516 | gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->Msg; |
517 | gpadlmsg->Header.MessageType = ChannelMessageGpadlHeader; | |
518 | gpadlmsg->ChildRelId = channel->OfferMsg.ChildRelId; | |
519 | gpadlmsg->Gpadl = next_gpadl_handle; | |
3e7ee490 | 520 | |
fff41b2e | 521 | dump_gpadl_header(gpadlmsg); |
3e7ee490 | 522 | |
dd0813b6 | 523 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
39d70a4a | 524 | list_add_tail(&msginfo->MsgListEntry, |
53af545b | 525 | &gVmbusConnection.ChannelMsgList); |
3e7ee490 | 526 | |
53af545b | 527 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 | 528 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
39d70a4a | 529 | kbuffer, size, msgcount); |
3e7ee490 | 530 | |
f4266e34 | 531 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
39d70a4a | 532 | msginfo->MessageSize - sizeof(*msginfo)); |
3e7ee490 | 533 | |
39d70a4a HZ |
534 | ret = VmbusPostMessage(gpadlmsg, msginfo->MessageSize - |
535 | sizeof(*msginfo)); | |
f4266e34 | 536 | if (ret != 0) { |
3e7ee490 HJ |
537 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
538 | goto Cleanup; | |
539 | } | |
540 | ||
39d70a4a HZ |
541 | if (msgcount > 1) { |
542 | list_for_each(curr, &msginfo->SubMsgList) { | |
53af545b BP |
543 | |
544 | /* FIXME: should this use list_entry() instead ? */ | |
39d70a4a HZ |
545 | submsginfo = (struct vmbus_channel_msginfo *)curr; |
546 | gpadl_body = | |
547 | (struct vmbus_channel_gpadl_body *)submsginfo->Msg; | |
3e7ee490 | 548 | |
39d70a4a HZ |
549 | gpadl_body->Header.MessageType = |
550 | ChannelMessageGpadlBody; | |
551 | gpadl_body->Gpadl = next_gpadl_handle; | |
3e7ee490 | 552 | |
f4266e34 | 553 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
39d70a4a HZ |
554 | submsginfo->MessageSize - |
555 | sizeof(*submsginfo)); | |
556 | ||
fff41b2e | 557 | dump_gpadl_body(gpadl_body, submsginfo->MessageSize - |
39d70a4a HZ |
558 | sizeof(*submsginfo)); |
559 | ret = VmbusPostMessage(gpadl_body, | |
560 | submsginfo->MessageSize - | |
561 | sizeof(*submsginfo)); | |
fd4dc88e | 562 | if (ret != 0) |
99259159 BP |
563 | goto Cleanup; |
564 | ||
3e7ee490 HJ |
565 | } |
566 | } | |
39d70a4a | 567 | osd_WaitEventWait(msginfo->WaitEvent); |
3e7ee490 | 568 | |
454f18a9 | 569 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
570 | DPRINT_DBG(VMBUS, "Received GPADL created " |
571 | "(relid %d, status %d handle %x)", | |
39d70a4a HZ |
572 | channel->OfferMsg.ChildRelId, |
573 | msginfo->Response.GpadlCreated.CreationStatus, | |
574 | gpadlmsg->Gpadl); | |
3e7ee490 | 575 | |
39d70a4a | 576 | *gpadl_handle = gpadlmsg->Gpadl; |
3e7ee490 HJ |
577 | |
578 | Cleanup: | |
dd0813b6 | 579 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
39d70a4a | 580 | list_del(&msginfo->MsgListEntry); |
dd0813b6 | 581 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 582 | |
39d70a4a HZ |
583 | kfree(msginfo->WaitEvent); |
584 | kfree(msginfo); | |
3e7ee490 HJ |
585 | return ret; |
586 | } | |
98873724 | 587 | EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); |
3e7ee490 | 588 | |
3e189519 | 589 | /* |
fff41b2e | 590 | * vmbus_teardown_gpadl -Teardown the specified GPADL handle |
f4266e34 | 591 | */ |
fff41b2e | 592 | int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) |
3e7ee490 | 593 | { |
82250213 | 594 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 595 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 596 | unsigned long flags; |
f4266e34 | 597 | int ret; |
3e7ee490 | 598 | |
39d70a4a | 599 | /* ASSERT(gpadl_handle != 0); */ |
3e7ee490 | 600 | |
f4266e34 GKH |
601 | info = kmalloc(sizeof(*info) + |
602 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
c3bf2e26 BP |
603 | if (!info) |
604 | return -ENOMEM; | |
3e7ee490 | 605 | |
bfc30aae | 606 | info->WaitEvent = osd_WaitEventCreate(); |
c3bf2e26 BP |
607 | if (!info->WaitEvent) { |
608 | kfree(info); | |
609 | return -ENOMEM; | |
610 | } | |
3e7ee490 | 611 | |
82250213 | 612 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
613 | |
614 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
39d70a4a HZ |
615 | msg->ChildRelId = channel->OfferMsg.ChildRelId; |
616 | msg->Gpadl = gpadl_handle; | |
3e7ee490 | 617 | |
dd0813b6 | 618 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
619 | list_add_tail(&info->MsgListEntry, |
620 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 621 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 622 | |
f4266e34 GKH |
623 | ret = VmbusPostMessage(msg, |
624 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
625 | if (ret != 0) { | |
454f18a9 | 626 | /* TODO: */ |
f4266e34 | 627 | /* something... */ |
3e7ee490 HJ |
628 | } |
629 | ||
bfc30aae | 630 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 631 | |
454f18a9 | 632 | /* Received a torndown response */ |
dd0813b6 | 633 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 634 | list_del(&info->MsgListEntry); |
dd0813b6 | 635 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 636 | |
420beac4 | 637 | kfree(info->WaitEvent); |
8c69f52a | 638 | kfree(info); |
3e7ee490 HJ |
639 | return ret; |
640 | } | |
18726d7a | 641 | EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); |
3e7ee490 | 642 | |
3e189519 | 643 | /* |
fff41b2e | 644 | * vmbus_close - Close the specified channel |
f4266e34 | 645 | */ |
fff41b2e | 646 | void vmbus_close(struct vmbus_channel *channel) |
3e7ee490 | 647 | { |
82250213 | 648 | struct vmbus_channel_close_channel *msg; |
aded7165 | 649 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 650 | unsigned long flags; |
f4266e34 | 651 | int ret; |
3e7ee490 | 652 | |
454f18a9 | 653 | /* Stop callback and cancel the timer asap */ |
39d70a4a HZ |
654 | channel->OnChannelCallback = NULL; |
655 | del_timer_sync(&channel->poll_timer); | |
3e7ee490 | 656 | |
454f18a9 | 657 | /* Send a closing message */ |
f4266e34 GKH |
658 | info = kmalloc(sizeof(*info) + |
659 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
c3bf2e26 BP |
660 | /* FIXME: can't do anything other than return here because the |
661 | * function is void */ | |
662 | if (!info) | |
663 | return; | |
3e7ee490 | 664 | |
bfc30aae | 665 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 666 | |
82250213 | 667 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 | 668 | msg->Header.MessageType = ChannelMessageCloseChannel; |
39d70a4a | 669 | msg->ChildRelId = channel->OfferMsg.ChildRelId; |
3e7ee490 | 670 | |
82250213 | 671 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 672 | if (ret != 0) { |
454f18a9 | 673 | /* TODO: */ |
f4266e34 | 674 | /* something... */ |
3e7ee490 HJ |
675 | } |
676 | ||
454f18a9 | 677 | /* Tear down the gpadl for the channel's ring buffer */ |
39d70a4a | 678 | if (channel->RingBufferGpadlHandle) |
fff41b2e | 679 | vmbus_teardown_gpadl(channel, |
39d70a4a | 680 | channel->RingBufferGpadlHandle); |
3e7ee490 | 681 | |
454f18a9 | 682 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 683 | |
454f18a9 | 684 | /* Cleanup the ring buffers for this channel */ |
39d70a4a HZ |
685 | RingBufferCleanup(&channel->Outbound); |
686 | RingBufferCleanup(&channel->Inbound); | |
3e7ee490 | 687 | |
39d70a4a | 688 | osd_PageFree(channel->RingBufferPages, channel->RingBufferPageCount); |
3e7ee490 | 689 | |
8c69f52a | 690 | kfree(info); |
3e7ee490 | 691 | |
454f18a9 BP |
692 | /* |
693 | * If we are closing the channel during an error path in | |
694 | * opening the channel, don't free the channel since the | |
695 | * caller will free the channel | |
696 | */ | |
697 | ||
39d70a4a | 698 | if (channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 699 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
39d70a4a | 700 | list_del(&channel->ListEntry); |
0f5e44ca | 701 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 702 | |
e98cb276 | 703 | free_channel(channel); |
3e7ee490 | 704 | } |
3e7ee490 HJ |
705 | } |
706 | ||
c88c4e4c | 707 | /** |
fff41b2e | 708 | * vmbus_sendpacket() - Send the specified buffer on the given channel |
39d70a4a HZ |
709 | * @channel: Pointer to vmbus_channel structure. |
710 | * @buffer: Pointer to the buffer you want to receive the data into. | |
711 | * @bufferlen: Maximum size of what the the buffer will hold | |
712 | * @requestid: Identifier of the request | |
713 | * @type: Type of packet that is being send e.g. negotiate, time | |
c88c4e4c HJ |
714 | * packet etc. |
715 | * | |
39d70a4a | 716 | * Sends data in @buffer directly to hyper-v via the vmbus |
c88c4e4c HJ |
717 | * This will send the data unparsed to hyper-v. |
718 | * | |
719 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 720 | */ |
fff41b2e | 721 | int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, |
39d70a4a HZ |
722 | u32 bufferlen, u64 requestid, |
723 | enum vmbus_packet_type type, u32 flags) | |
3e7ee490 | 724 | { |
8dc0a06a | 725 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
726 | u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; |
727 | u32 packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); | |
728 | struct scatterlist bufferlist[3]; | |
729 | u64 aligned_data = 0; | |
f4266e34 | 730 | int ret; |
3e7ee490 | 731 | |
f4266e34 | 732 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
39d70a4a | 733 | channel, buffer, bufferlen); |
3e7ee490 | 734 | |
fff41b2e | 735 | dump_vmbus_channel(channel); |
3e7ee490 | 736 | |
0ace247e | 737 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 738 | |
454f18a9 | 739 | /* Setup the descriptor */ |
39d70a4a HZ |
740 | desc.Type = type; /* VmbusPacketTypeDataInBand; */ |
741 | desc.Flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
742 | /* in 8-bytes granularity */ |
743 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
39d70a4a HZ |
744 | desc.Length8 = (u16)(packetlen_aligned >> 3); |
745 | desc.TransactionId = requestid; | |
3e7ee490 | 746 | |
39d70a4a HZ |
747 | sg_init_table(bufferlist, 3); |
748 | sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); | |
749 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
750 | sg_set_buf(&bufferlist[2], &aligned_data, | |
751 | packetlen_aligned - packetlen); | |
3e7ee490 | 752 | |
39d70a4a | 753 | ret = RingBufferWrite(&channel->Outbound, bufferlist, 3); |
3e7ee490 | 754 | |
454f18a9 | 755 | /* TODO: We should determine if this is optional */ |
39d70a4a | 756 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->Outbound)) |
fff41b2e | 757 | vmbus_setevent(channel); |
3e7ee490 | 758 | |
3e7ee490 HJ |
759 | return ret; |
760 | } | |
fff41b2e | 761 | EXPORT_SYMBOL(vmbus_sendpacket); |
3e7ee490 | 762 | |
3e189519 | 763 | /* |
fff41b2e | 764 | * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer |
3e189519 | 765 | * packets using a GPADL Direct packet type. |
f4266e34 | 766 | */ |
fff41b2e | 767 | int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
768 | struct hv_page_buffer pagebuffers[], |
769 | u32 pagecount, void *buffer, u32 bufferlen, | |
770 | u64 requestid) | |
3e7ee490 | 771 | { |
f4266e34 GKH |
772 | int ret; |
773 | int i; | |
430a8e9a | 774 | struct vmbus_channel_packet_page_buffer desc; |
39d70a4a HZ |
775 | u32 descsize; |
776 | u32 packetlen; | |
777 | u32 packetlen_aligned; | |
778 | struct scatterlist bufferlist[3]; | |
779 | u64 aligned_data = 0; | |
3e7ee490 | 780 | |
39d70a4a | 781 | if (pagecount > MAX_PAGE_BUFFER_COUNT) |
002b53ea | 782 | return -EINVAL; |
3e7ee490 | 783 | |
fff41b2e | 784 | dump_vmbus_channel(channel); |
3e7ee490 | 785 | |
f4266e34 | 786 | /* |
430a8e9a | 787 | * Adjust the size down since vmbus_channel_packet_page_buffer is the |
f4266e34 GKH |
788 | * largest size we support |
789 | */ | |
39d70a4a HZ |
790 | descsize = sizeof(struct vmbus_channel_packet_page_buffer) - |
791 | ((MAX_PAGE_BUFFER_COUNT - pagecount) * | |
f4266e34 | 792 | sizeof(struct hv_page_buffer)); |
39d70a4a HZ |
793 | packetlen = descsize + bufferlen; |
794 | packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); | |
3e7ee490 | 795 | |
0ace247e | 796 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 797 | |
454f18a9 | 798 | /* Setup the descriptor */ |
430a8e9a HZ |
799 | desc.type = VmbusPacketTypeDataUsingGpaDirect; |
800 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
39d70a4a HZ |
801 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
802 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
803 | desc.transactionid = requestid; | |
804 | desc.rangecount = pagecount; | |
805 | ||
806 | for (i = 0; i < pagecount; i++) { | |
807 | desc.range[i].Length = pagebuffers[i].Length; | |
808 | desc.range[i].Offset = pagebuffers[i].Offset; | |
809 | desc.range[i].Pfn = pagebuffers[i].Pfn; | |
3e7ee490 HJ |
810 | } |
811 | ||
39d70a4a HZ |
812 | sg_init_table(bufferlist, 3); |
813 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
814 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
815 | sg_set_buf(&bufferlist[2], &aligned_data, | |
816 | packetlen_aligned - packetlen); | |
3e7ee490 | 817 | |
39d70a4a | 818 | ret = RingBufferWrite(&channel->Outbound, bufferlist, 3); |
3e7ee490 | 819 | |
454f18a9 | 820 | /* TODO: We should determine if this is optional */ |
39d70a4a | 821 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->Outbound)) |
fff41b2e | 822 | vmbus_setevent(channel); |
3e7ee490 | 823 | |
3e7ee490 HJ |
824 | return ret; |
825 | } | |
826 | ||
3e189519 | 827 | /* |
fff41b2e | 828 | * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet |
3e189519 | 829 | * using a GPADL Direct packet type. |
f4266e34 | 830 | */ |
fff41b2e | 831 | int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, |
39d70a4a HZ |
832 | struct hv_multipage_buffer *multi_pagebuffer, |
833 | void *buffer, u32 bufferlen, u64 requestid) | |
3e7ee490 | 834 | { |
f4266e34 | 835 | int ret; |
430a8e9a | 836 | struct vmbus_channel_packet_multipage_buffer desc; |
39d70a4a HZ |
837 | u32 descsize; |
838 | u32 packetlen; | |
839 | u32 packetlen_aligned; | |
840 | struct scatterlist bufferlist[3]; | |
841 | u64 aligned_data = 0; | |
842 | u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->Offset, | |
843 | multi_pagebuffer->Length); | |
3e7ee490 | 844 | |
fff41b2e | 845 | dump_vmbus_channel(channel); |
3e7ee490 | 846 | |
f4266e34 | 847 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
39d70a4a HZ |
848 | multi_pagebuffer->Offset, |
849 | multi_pagebuffer->Length, pfncount); | |
3e7ee490 | 850 | |
39d70a4a | 851 | if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT)) |
002b53ea | 852 | return -EINVAL; |
3e7ee490 | 853 | |
f4266e34 | 854 | /* |
430a8e9a | 855 | * Adjust the size down since vmbus_channel_packet_multipage_buffer is |
f4266e34 GKH |
856 | * the largest size we support |
857 | */ | |
39d70a4a HZ |
858 | descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - |
859 | ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * | |
f4266e34 | 860 | sizeof(u64)); |
39d70a4a HZ |
861 | packetlen = descsize + bufferlen; |
862 | packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); | |
3e7ee490 | 863 | |
0ace247e | 864 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
3e7ee490 | 865 | |
454f18a9 | 866 | /* Setup the descriptor */ |
430a8e9a HZ |
867 | desc.type = VmbusPacketTypeDataUsingGpaDirect; |
868 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
39d70a4a HZ |
869 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
870 | desc.length8 = (u16)(packetlen_aligned >> 3); | |
871 | desc.transactionid = requestid; | |
430a8e9a | 872 | desc.rangecount = 1; |
3e7ee490 | 873 | |
39d70a4a HZ |
874 | desc.range.Length = multi_pagebuffer->Length; |
875 | desc.range.Offset = multi_pagebuffer->Offset; | |
3e7ee490 | 876 | |
39d70a4a HZ |
877 | memcpy(desc.range.PfnArray, multi_pagebuffer->PfnArray, |
878 | pfncount * sizeof(u64)); | |
3e7ee490 | 879 | |
39d70a4a HZ |
880 | sg_init_table(bufferlist, 3); |
881 | sg_set_buf(&bufferlist[0], &desc, descsize); | |
882 | sg_set_buf(&bufferlist[1], buffer, bufferlen); | |
883 | sg_set_buf(&bufferlist[2], &aligned_data, | |
884 | packetlen_aligned - packetlen); | |
3e7ee490 | 885 | |
39d70a4a | 886 | ret = RingBufferWrite(&channel->Outbound, bufferlist, 3); |
3e7ee490 | 887 | |
454f18a9 | 888 | /* TODO: We should determine if this is optional */ |
39d70a4a | 889 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->Outbound)) |
fff41b2e | 890 | vmbus_setevent(channel); |
3e7ee490 | 891 | |
3e7ee490 HJ |
892 | return ret; |
893 | } | |
4cb106fa | 894 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); |
c88c4e4c HJ |
895 | |
896 | /** | |
fff41b2e | 897 | * vmbus_recvpacket() - Retrieve the user packet on the specified channel |
39d70a4a HZ |
898 | * @channel: Pointer to vmbus_channel structure. |
899 | * @buffer: Pointer to the buffer you want to receive the data into. | |
900 | * @bufferlen: Maximum size of what the the buffer will hold | |
901 | * @buffer_actual_len: The actual size of the data after it was received | |
902 | * @requestid: Identifier of the request | |
c88c4e4c HJ |
903 | * |
904 | * Receives directly from the hyper-v vmbus and puts the data it received | |
905 | * into Buffer. This will receive the data unparsed from hyper-v. | |
906 | * | |
907 | * Mainly used by Hyper-V drivers. | |
f4266e34 | 908 | */ |
fff41b2e | 909 | int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, |
39d70a4a | 910 | u32 bufferlen, u32 *buffer_actual_len, u64 *requestid) |
3e7ee490 | 911 | { |
8dc0a06a | 912 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
913 | u32 packetlen; |
914 | u32 userlen; | |
3e7ee490 | 915 | int ret; |
54411c42 | 916 | unsigned long flags; |
3e7ee490 | 917 | |
39d70a4a HZ |
918 | *buffer_actual_len = 0; |
919 | *requestid = 0; | |
3e7ee490 | 920 | |
39d70a4a | 921 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 922 | |
39d70a4a | 923 | ret = RingBufferPeek(&channel->Inbound, &desc, |
f4266e34 GKH |
924 | sizeof(struct vmpacket_descriptor)); |
925 | if (ret != 0) { | |
39d70a4a | 926 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 927 | |
454f18a9 | 928 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
929 | return 0; |
930 | } | |
931 | ||
454f18a9 | 932 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 933 | |
39d70a4a HZ |
934 | packetlen = desc.Length8 << 3; |
935 | userlen = packetlen - (desc.DataOffset8 << 3); | |
454f18a9 | 936 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 937 | |
f4266e34 GKH |
938 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
939 | "flag %d tid %llx pktlen %d datalen %d> ", | |
39d70a4a HZ |
940 | channel, channel->OfferMsg.ChildRelId, desc.Type, |
941 | desc.Flags, desc.TransactionId, packetlen, userlen); | |
3e7ee490 | 942 | |
39d70a4a | 943 | *buffer_actual_len = userlen; |
3e7ee490 | 944 | |
39d70a4a HZ |
945 | if (userlen > bufferlen) { |
946 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 947 | |
f4266e34 | 948 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
39d70a4a | 949 | bufferlen, userlen); |
3e7ee490 HJ |
950 | return -1; |
951 | } | |
952 | ||
39d70a4a | 953 | *requestid = desc.TransactionId; |
3e7ee490 | 954 | |
454f18a9 | 955 | /* Copy over the packet to the user buffer */ |
39d70a4a | 956 | ret = RingBufferRead(&channel->Inbound, buffer, userlen, |
f4266e34 | 957 | (desc.DataOffset8 << 3)); |
3e7ee490 | 958 | |
39d70a4a | 959 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 960 | |
3e7ee490 HJ |
961 | return 0; |
962 | } | |
fff41b2e | 963 | EXPORT_SYMBOL(vmbus_recvpacket); |
3e7ee490 | 964 | |
3e189519 | 965 | /* |
fff41b2e | 966 | * vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel |
f4266e34 | 967 | */ |
fff41b2e | 968 | int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, |
39d70a4a HZ |
969 | u32 bufferlen, u32 *buffer_actual_len, |
970 | u64 *requestid) | |
3e7ee490 | 971 | { |
8dc0a06a | 972 | struct vmpacket_descriptor desc; |
39d70a4a HZ |
973 | u32 packetlen; |
974 | u32 userlen; | |
3e7ee490 | 975 | int ret; |
54411c42 | 976 | unsigned long flags; |
3e7ee490 | 977 | |
39d70a4a HZ |
978 | *buffer_actual_len = 0; |
979 | *requestid = 0; | |
3e7ee490 | 980 | |
39d70a4a | 981 | spin_lock_irqsave(&channel->inbound_lock, flags); |
3e7ee490 | 982 | |
39d70a4a | 983 | ret = RingBufferPeek(&channel->Inbound, &desc, |
f4266e34 GKH |
984 | sizeof(struct vmpacket_descriptor)); |
985 | if (ret != 0) { | |
39d70a4a | 986 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 | 987 | |
454f18a9 | 988 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
989 | return 0; |
990 | } | |
991 | ||
454f18a9 | 992 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 | 993 | |
39d70a4a HZ |
994 | packetlen = desc.Length8 << 3; |
995 | userlen = packetlen - (desc.DataOffset8 << 3); | |
3e7ee490 | 996 | |
f4266e34 GKH |
997 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
998 | "flag %d tid %llx pktlen %d datalen %d> ", | |
39d70a4a HZ |
999 | channel, channel->OfferMsg.ChildRelId, desc.Type, |
1000 | desc.Flags, desc.TransactionId, packetlen, userlen); | |
3e7ee490 | 1001 | |
39d70a4a | 1002 | *buffer_actual_len = packetlen; |
3e7ee490 | 1003 | |
39d70a4a HZ |
1004 | if (packetlen > bufferlen) { |
1005 | spin_unlock_irqrestore(&channel->inbound_lock, flags); | |
3e7ee490 | 1006 | |
f4266e34 | 1007 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
39d70a4a | 1008 | "got space for only %d bytes", packetlen, bufferlen); |
3e7ee490 HJ |
1009 | return -2; |
1010 | } | |
1011 | ||
39d70a4a | 1012 | *requestid = desc.TransactionId; |
3e7ee490 | 1013 | |
454f18a9 | 1014 | /* Copy over the entire packet to the user buffer */ |
39d70a4a | 1015 | ret = RingBufferRead(&channel->Inbound, buffer, packetlen, 0); |
3e7ee490 | 1016 | |
39d70a4a | 1017 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
3e7ee490 HJ |
1018 | return 0; |
1019 | } | |
adaee6bd | 1020 | EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw); |
3e7ee490 | 1021 | |
3e189519 | 1022 | /* |
fff41b2e | 1023 | * vmbus_onchannel_event - Channel event callback |
f4266e34 | 1024 | */ |
fff41b2e | 1025 | void vmbus_onchannel_event(struct vmbus_channel *channel) |
3e7ee490 | 1026 | { |
fff41b2e | 1027 | dump_vmbus_channel(channel); |
0ace247e | 1028 | /* ASSERT(Channel->OnChannelCallback); */ |
5996b3dd | 1029 | |
39d70a4a | 1030 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
5996b3dd | 1031 | |
39d70a4a | 1032 | mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100)); |
3e7ee490 HJ |
1033 | } |
1034 | ||
3e189519 | 1035 | /* |
fff41b2e | 1036 | * vmbus_ontimer - Timer event callback |
f4266e34 | 1037 | */ |
fff41b2e | 1038 | void vmbus_ontimer(unsigned long data) |
3e7ee490 | 1039 | { |
aded7165 | 1040 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 1041 | |
0fa37b1e | 1042 | if (channel->OnChannelCallback) |
3e7ee490 | 1043 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
1044 | } |
1045 | ||
3e189519 | 1046 | /* |
fff41b2e | 1047 | * dump_vmbus_channel- Dump vmbus channel info to the console |
f4266e34 | 1048 | */ |
fff41b2e | 1049 | static void dump_vmbus_channel(struct vmbus_channel *channel) |
3e7ee490 | 1050 | { |
39d70a4a HZ |
1051 | DPRINT_DBG(VMBUS, "Channel (%d)", channel->OfferMsg.ChildRelId); |
1052 | DumpRingInfo(&channel->Outbound, "Outbound "); | |
1053 | DumpRingInfo(&channel->Inbound, "Inbound "); | |
3e7ee490 | 1054 | } |