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 | */ |
a0086dc5 GKH |
21 | #include <linux/kernel.h> |
22 | #include <linux/mm.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
53af545b | 24 | #include <linux/list.h> |
c88c4e4c | 25 | #include <linux/module.h> |
4983b39a | 26 | #include "osd.h" |
645954c5 | 27 | #include "logging.h" |
3e7ee490 | 28 | #include "VmbusPrivate.h" |
c88c4e4c | 29 | #include "utils.h" |
3e7ee490 | 30 | |
1d7e907f | 31 | struct vmbus_channel_message_table_entry { |
c8212f04 GKH |
32 | enum vmbus_channel_message_type messageType; |
33 | void (*messageHandler)(struct vmbus_channel_message_header *msg); | |
1d7e907f | 34 | }; |
3e7ee490 | 35 | |
c88c4e4c HJ |
36 | #define MAX_MSG_TYPES 1 |
37 | #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 5 | |
38 | ||
bd60c33e | 39 | static const struct hv_guid |
c88c4e4c | 40 | gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = { |
454f18a9 | 41 | /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ |
caf26a31 GKH |
42 | /* Storage - SCSI */ |
43 | { | |
44 | .data = { | |
45 | 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
46 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f | |
47 | } | |
48 | }, | |
49 | ||
454f18a9 | 50 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
caf26a31 GKH |
51 | /* Network */ |
52 | { | |
53 | .data = { | |
54 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
55 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
56 | } | |
57 | }, | |
58 | ||
454f18a9 | 59 | /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */ |
caf26a31 GKH |
60 | /* Input */ |
61 | { | |
62 | .data = { | |
63 | 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, | |
64 | 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A | |
65 | } | |
66 | }, | |
3e7ee490 | 67 | |
caf26a31 GKH |
68 | /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ |
69 | /* IDE */ | |
70 | { | |
71 | .data = { | |
72 | 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, | |
73 | 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 | |
74 | } | |
75 | }, | |
c88c4e4c HJ |
76 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ |
77 | /* Shutdown */ | |
78 | { | |
79 | .data = { | |
80 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
81 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
82 | } | |
83 | }, | |
3e7ee490 HJ |
84 | }; |
85 | ||
c88c4e4c HJ |
86 | |
87 | /** | |
88 | * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message | |
89 | * @icmsghdrp: Pointer to msg header structure | |
90 | * @icmsg_negotiate: Pointer to negotiate message structure | |
91 | * @buf: Raw buffer channel data | |
92 | * | |
93 | * @icmsghdrp is of type &struct icmsg_hdr. | |
94 | * @negop is of type &struct icmsg_negotiate. | |
95 | * Set up and fill in default negotiate response message. This response can | |
96 | * come from both the vmbus driver and the hv_utils driver. The current api | |
97 | * will respond properly to both Windows 2008 and Windows 2008-R2 operating | |
98 | * systems. | |
99 | * | |
100 | * Mainly used by Hyper-V drivers. | |
101 | */ | |
102 | void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, | |
103 | struct icmsg_negotiate *negop, | |
104 | u8 *buf) | |
105 | { | |
106 | if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { | |
107 | icmsghdrp->icmsgsize = 0x10; | |
108 | ||
109 | negop = (struct icmsg_negotiate *)&buf[ | |
110 | sizeof(struct vmbuspipe_hdr) + | |
111 | sizeof(struct icmsg_hdr)]; | |
112 | ||
113 | if (negop->icframe_vercnt == 2 && | |
114 | negop->icversion_data[1].major == 3) { | |
115 | negop->icversion_data[0].major = 3; | |
116 | negop->icversion_data[0].minor = 0; | |
117 | negop->icversion_data[1].major = 3; | |
118 | negop->icversion_data[1].minor = 0; | |
119 | } else { | |
120 | negop->icversion_data[0].major = 1; | |
121 | negop->icversion_data[0].minor = 0; | |
122 | negop->icversion_data[1].major = 1; | |
123 | negop->icversion_data[1].minor = 0; | |
124 | } | |
125 | ||
126 | negop->icframe_vercnt = 1; | |
127 | negop->icmsg_vercnt = 1; | |
128 | } | |
129 | } | |
130 | EXPORT_SYMBOL(prep_negotiate_resp); | |
131 | ||
132 | /** | |
133 | * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK | |
134 | * Hyper-V requests | |
135 | * @context: Pointer to argument structure. | |
136 | * | |
137 | * Set up the default handler for non device driver specific requests | |
138 | * from Hyper-V. This stub responds to the default negotiate messages | |
139 | * that come in for every non IDE/SCSI/Network request. | |
140 | * This behavior is normally overwritten in the hv_utils driver. That | |
141 | * driver handles requests like gracefull shutdown, heartbeats etc. | |
142 | * | |
143 | * Mainly used by Hyper-V drivers. | |
144 | */ | |
145 | void chn_cb_negotiate(void *context) | |
146 | { | |
147 | struct vmbus_channel *channel = context; | |
148 | u8 *buf; | |
149 | u32 buflen, recvlen; | |
150 | u64 requestid; | |
151 | ||
152 | struct icmsg_hdr *icmsghdrp; | |
153 | struct icmsg_negotiate *negop = NULL; | |
154 | ||
155 | buflen = PAGE_SIZE; | |
156 | buf = kmalloc(buflen, GFP_ATOMIC); | |
157 | ||
158 | VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid); | |
159 | ||
160 | if (recvlen > 0) { | |
161 | icmsghdrp = (struct icmsg_hdr *)&buf[ | |
162 | sizeof(struct vmbuspipe_hdr)]; | |
163 | ||
164 | prep_negotiate_resp(icmsghdrp, negop, buf); | |
165 | ||
166 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | |
167 | | ICMSGHDRFLAG_RESPONSE; | |
168 | ||
169 | VmbusChannelSendPacket(channel, buf, | |
170 | recvlen, requestid, | |
171 | VmbusPacketTypeDataInBand, 0); | |
172 | } | |
173 | ||
174 | kfree(buf); | |
175 | } | |
176 | EXPORT_SYMBOL(chn_cb_negotiate); | |
177 | ||
178 | /* | |
179 | * Function table used for message responses for non IDE/SCSI/Network type | |
180 | * messages. (Such as KVP/Shutdown etc) | |
181 | */ | |
182 | struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = { | |
183 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ | |
184 | /* Shutdown */ | |
185 | { | |
186 | .msg_type = HV_SHUTDOWN_MSG, | |
187 | .data = { | |
188 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
189 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
190 | }, | |
191 | .callback = chn_cb_negotiate, | |
192 | .log_msg = "Shutdown channel functionality initialized" | |
193 | }, | |
194 | }; | |
195 | EXPORT_SYMBOL(hv_cb_utils); | |
196 | ||
3e189519 | 197 | /* |
bd60c33e GKH |
198 | * AllocVmbusChannel - Allocate and initialize a vmbus channel object |
199 | */ | |
aded7165 | 200 | struct vmbus_channel *AllocVmbusChannel(void) |
3e7ee490 | 201 | { |
aded7165 | 202 | struct vmbus_channel *channel; |
3e7ee490 | 203 | |
aded7165 | 204 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
3e7ee490 | 205 | if (!channel) |
3e7ee490 | 206 | return NULL; |
3e7ee490 | 207 | |
54411c42 | 208 | spin_lock_init(&channel->inbound_lock); |
3e7ee490 | 209 | |
c8a429a4 GKH |
210 | init_timer(&channel->poll_timer); |
211 | channel->poll_timer.data = (unsigned long)channel; | |
212 | channel->poll_timer.function = VmbusChannelOnTimer; | |
3e7ee490 | 213 | |
de65a384 | 214 | channel->ControlWQ = create_workqueue("hv_vmbus_ctl"); |
bd60c33e | 215 | if (!channel->ControlWQ) { |
8c69f52a | 216 | kfree(channel); |
3e7ee490 HJ |
217 | return NULL; |
218 | } | |
219 | ||
220 | return channel; | |
221 | } | |
222 | ||
3e189519 | 223 | /* |
bd60c33e GKH |
224 | * ReleaseVmbusChannel - Release the vmbus channel object itself |
225 | */ | |
226 | static inline void ReleaseVmbusChannel(void *context) | |
3e7ee490 | 227 | { |
bd60c33e | 228 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
229 | |
230 | DPRINT_ENTER(VMBUS); | |
231 | ||
232 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); | |
de65a384 | 233 | destroy_workqueue(channel->ControlWQ); |
3e7ee490 HJ |
234 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
235 | ||
8c69f52a | 236 | kfree(channel); |
3e7ee490 HJ |
237 | |
238 | DPRINT_EXIT(VMBUS); | |
239 | } | |
240 | ||
3e189519 | 241 | /* |
bd60c33e GKH |
242 | * FreeVmbusChannel - Release the resources used by the vmbus channel object |
243 | */ | |
aded7165 | 244 | void FreeVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 | 245 | { |
5996b3dd | 246 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 247 | |
bd60c33e GKH |
248 | /* |
249 | * We have to release the channel's workqueue/thread in the vmbus's | |
250 | * workqueue/thread context | |
251 | * ie we can't destroy ourselves. | |
252 | */ | |
de65a384 | 253 | osd_schedule_callback(gVmbusConnection.WorkQueue, ReleaseVmbusChannel, |
bd60c33e | 254 | Channel); |
3e7ee490 HJ |
255 | } |
256 | ||
3e189519 | 257 | /* |
c88c4e4c HJ |
258 | * VmbusChannelProcessOffer - Process the offer by creating a channel/device |
259 | * associated with this offer | |
bd60c33e GKH |
260 | */ |
261 | static void VmbusChannelProcessOffer(void *context) | |
3e7ee490 | 262 | { |
aded7165 GKH |
263 | struct vmbus_channel *newChannel = context; |
264 | struct vmbus_channel *channel; | |
0e727613 | 265 | bool fNew = true; |
bd60c33e | 266 | int ret; |
c88c4e4c | 267 | int cnt; |
0f5e44ca | 268 | unsigned long flags; |
3e7ee490 HJ |
269 | |
270 | DPRINT_ENTER(VMBUS); | |
271 | ||
454f18a9 | 272 | /* Make sure this is a new offer */ |
0f5e44ca | 273 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 274 | |
53af545b | 275 | list_for_each_entry(channel, &gVmbusConnection.ChannelList, ListEntry) { |
bd60c33e GKH |
276 | if (!memcmp(&channel->OfferMsg.Offer.InterfaceType, |
277 | &newChannel->OfferMsg.Offer.InterfaceType, | |
278 | sizeof(struct hv_guid)) && | |
279 | !memcmp(&channel->OfferMsg.Offer.InterfaceInstance, | |
280 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
281 | sizeof(struct hv_guid))) { | |
0e727613 | 282 | fNew = false; |
3e7ee490 HJ |
283 | break; |
284 | } | |
285 | } | |
286 | ||
287 | if (fNew) | |
53af545b BP |
288 | list_add_tail(&newChannel->ListEntry, |
289 | &gVmbusConnection.ChannelList); | |
bd60c33e | 290 | |
0f5e44ca | 291 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 292 | |
bd60c33e GKH |
293 | if (!fNew) { |
294 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", | |
295 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 HJ |
296 | FreeVmbusChannel(newChannel); |
297 | DPRINT_EXIT(VMBUS); | |
298 | return; | |
299 | } | |
300 | ||
bd60c33e GKH |
301 | /* |
302 | * Start the process of binding this offer to the driver | |
303 | * We need to set the DeviceObject field before calling | |
304 | * VmbusChildDeviceAdd() | |
305 | */ | |
3e7ee490 | 306 | newChannel->DeviceObject = VmbusChildDeviceCreate( |
daaa8cc3 GKH |
307 | &newChannel->OfferMsg.Offer.InterfaceType, |
308 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
3e7ee490 HJ |
309 | newChannel); |
310 | ||
bd60c33e GKH |
311 | DPRINT_DBG(VMBUS, "child device object allocated - %p", |
312 | newChannel->DeviceObject); | |
3e7ee490 | 313 | |
454f18a9 BP |
314 | /* |
315 | * Add the new device to the bus. This will kick off device-driver | |
316 | * binding which eventually invokes the device driver's AddDevice() | |
317 | * method. | |
318 | */ | |
3e7ee490 | 319 | ret = VmbusChildDeviceAdd(newChannel->DeviceObject); |
bd60c33e GKH |
320 | if (ret != 0) { |
321 | DPRINT_ERR(VMBUS, | |
322 | "unable to add child device object (relid %d)", | |
323 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 | 324 | |
0f5e44ca | 325 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 326 | list_del(&newChannel->ListEntry); |
0f5e44ca | 327 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
328 | |
329 | FreeVmbusChannel(newChannel); | |
bd60c33e | 330 | } else { |
454f18a9 BP |
331 | /* |
332 | * This state is used to indicate a successful open | |
333 | * so that when we do close the channel normally, we | |
334 | * can cleanup properly | |
335 | */ | |
3e7ee490 | 336 | newChannel->State = CHANNEL_OPEN_STATE; |
c88c4e4c HJ |
337 | cnt = 0; |
338 | ||
339 | while (cnt != MAX_MSG_TYPES) { | |
340 | if (memcmp(&newChannel->OfferMsg.Offer.InterfaceType, | |
341 | &hv_cb_utils[cnt].data, | |
342 | sizeof(struct hv_guid)) == 0) { | |
343 | DPRINT_INFO(VMBUS, "%s", | |
344 | hv_cb_utils[cnt].log_msg); | |
345 | ||
346 | if (VmbusChannelOpen(newChannel, 2 * PAGE_SIZE, | |
347 | 2 * PAGE_SIZE, NULL, 0, | |
348 | hv_cb_utils[cnt].callback, | |
349 | newChannel) == 0) | |
350 | hv_cb_utils[cnt].channel = newChannel; | |
351 | } | |
352 | cnt++; | |
353 | } | |
3e7ee490 HJ |
354 | } |
355 | DPRINT_EXIT(VMBUS); | |
356 | } | |
357 | ||
3e189519 | 358 | /* |
bd60c33e GKH |
359 | * VmbusChannelProcessRescindOffer - Rescind the offer by initiating a device removal |
360 | */ | |
361 | static void VmbusChannelProcessRescindOffer(void *context) | |
3e7ee490 | 362 | { |
aded7165 | 363 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
364 | |
365 | DPRINT_ENTER(VMBUS); | |
3e7ee490 | 366 | VmbusChildDeviceRemove(channel->DeviceObject); |
3e7ee490 HJ |
367 | DPRINT_EXIT(VMBUS); |
368 | } | |
369 | ||
3e189519 | 370 | /* |
bd60c33e GKH |
371 | * VmbusChannelOnOffer - Handler for channel offers from vmbus in parent partition. |
372 | * | |
373 | * We ignore all offers except network and storage offers. For each network and | |
374 | * storage offers, we create a channel object and queue a work item to the | |
375 | * channel object to process the offer synchronously | |
376 | */ | |
82250213 | 377 | static void VmbusChannelOnOffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 378 | { |
bd60c33e | 379 | struct vmbus_channel_offer_channel *offer; |
aded7165 | 380 | struct vmbus_channel *newChannel; |
caf26a31 GKH |
381 | struct hv_guid *guidType; |
382 | struct hv_guid *guidInstance; | |
3e7ee490 | 383 | int i; |
bd60c33e | 384 | int fSupported = 0; |
3e7ee490 HJ |
385 | |
386 | DPRINT_ENTER(VMBUS); | |
387 | ||
bd60c33e GKH |
388 | offer = (struct vmbus_channel_offer_channel *)hdr; |
389 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
390 | if (memcmp(&offer->Offer.InterfaceType, | |
391 | &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { | |
3e7ee490 HJ |
392 | fSupported = 1; |
393 | break; | |
394 | } | |
395 | } | |
396 | ||
bd60c33e GKH |
397 | if (!fSupported) { |
398 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " | |
399 | "child relid %d", offer->ChildRelId); | |
3e7ee490 | 400 | DPRINT_EXIT(VMBUS); |
3e7ee490 HJ |
401 | return; |
402 | } | |
403 | ||
404 | guidType = &offer->Offer.InterfaceType; | |
405 | guidInstance = &offer->Offer.InterfaceInstance; | |
406 | ||
bd60c33e GKH |
407 | DPRINT_INFO(VMBUS, "Channel offer notification - " |
408 | "child relid %d monitor id %d allocated %d, " | |
409 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
410 | "%02x%02x%02x%02x%02x%02x%02x%02x} " | |
411 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
412 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
413 | offer->ChildRelId, offer->MonitorId, | |
414 | offer->MonitorAllocated, | |
415 | guidType->data[3], guidType->data[2], | |
416 | guidType->data[1], guidType->data[0], | |
417 | guidType->data[5], guidType->data[4], | |
418 | guidType->data[7], guidType->data[6], | |
419 | guidType->data[8], guidType->data[9], | |
420 | guidType->data[10], guidType->data[11], | |
421 | guidType->data[12], guidType->data[13], | |
422 | guidType->data[14], guidType->data[15], | |
423 | guidInstance->data[3], guidInstance->data[2], | |
424 | guidInstance->data[1], guidInstance->data[0], | |
425 | guidInstance->data[5], guidInstance->data[4], | |
426 | guidInstance->data[7], guidInstance->data[6], | |
427 | guidInstance->data[8], guidInstance->data[9], | |
428 | guidInstance->data[10], guidInstance->data[11], | |
429 | guidInstance->data[12], guidInstance->data[13], | |
430 | guidInstance->data[14], guidInstance->data[15]); | |
3e7ee490 | 431 | |
454f18a9 | 432 | /* Allocate the channel object and save this offer. */ |
3e7ee490 | 433 | newChannel = AllocVmbusChannel(); |
bd60c33e | 434 | if (!newChannel) { |
3e7ee490 HJ |
435 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); |
436 | return; | |
437 | } | |
438 | ||
439 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newChannel); | |
440 | ||
bd60c33e GKH |
441 | memcpy(&newChannel->OfferMsg, offer, |
442 | sizeof(struct vmbus_channel_offer_channel)); | |
5654e932 GKH |
443 | newChannel->MonitorGroup = (u8)offer->MonitorId / 32; |
444 | newChannel->MonitorBit = (u8)offer->MonitorId % 32; | |
3e7ee490 | 445 | |
454f18a9 | 446 | /* TODO: Make sure the offer comes from our parent partition */ |
de65a384 BP |
447 | osd_schedule_callback(newChannel->ControlWQ, VmbusChannelProcessOffer, |
448 | newChannel); | |
3e7ee490 HJ |
449 | |
450 | DPRINT_EXIT(VMBUS); | |
451 | } | |
452 | ||
3e189519 | 453 | /* |
bd60c33e GKH |
454 | * VmbusChannelOnOfferRescind - Rescind offer handler. |
455 | * | |
456 | * We queue a work item to process this offer synchronously | |
457 | */ | |
82250213 | 458 | static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 459 | { |
bd60c33e | 460 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 461 | struct vmbus_channel *channel; |
3e7ee490 HJ |
462 | |
463 | DPRINT_ENTER(VMBUS); | |
464 | ||
bd60c33e | 465 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
3e7ee490 | 466 | channel = GetChannelFromRelId(rescind->ChildRelId); |
bd60c33e GKH |
467 | if (channel == NULL) { |
468 | DPRINT_DBG(VMBUS, "channel not found for relId %d", | |
469 | rescind->ChildRelId); | |
3e7ee490 HJ |
470 | return; |
471 | } | |
472 | ||
de65a384 BP |
473 | osd_schedule_callback(channel->ControlWQ, |
474 | VmbusChannelProcessRescindOffer, | |
475 | channel); | |
3e7ee490 HJ |
476 | |
477 | DPRINT_EXIT(VMBUS); | |
478 | } | |
479 | ||
3e189519 | 480 | /* |
bd60c33e GKH |
481 | * VmbusChannelOnOffersDelivered - This is invoked when all offers have been delivered. |
482 | * | |
483 | * Nothing to do here. | |
484 | */ | |
485 | static void VmbusChannelOnOffersDelivered( | |
486 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 HJ |
487 | { |
488 | DPRINT_ENTER(VMBUS); | |
489 | DPRINT_EXIT(VMBUS); | |
490 | } | |
491 | ||
3e189519 | 492 | /* |
bd60c33e GKH |
493 | * VmbusChannelOnOpenResult - Open result handler. |
494 | * | |
495 | * This is invoked when we received a response to our channel open request. | |
496 | * Find the matching request, copy the response and signal the requesting | |
497 | * thread. | |
498 | */ | |
82250213 | 499 | static void VmbusChannelOnOpenResult(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 500 | { |
bd60c33e | 501 | struct vmbus_channel_open_result *result; |
53af545b | 502 | struct list_head *curr; |
aded7165 | 503 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
504 | struct vmbus_channel_message_header *requestHeader; |
505 | struct vmbus_channel_open_channel *openMsg; | |
dd0813b6 | 506 | unsigned long flags; |
3e7ee490 HJ |
507 | |
508 | DPRINT_ENTER(VMBUS); | |
509 | ||
bd60c33e | 510 | result = (struct vmbus_channel_open_result *)hdr; |
3e7ee490 HJ |
511 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status); |
512 | ||
bd60c33e GKH |
513 | /* |
514 | * Find the open msg, copy the result and signal/unblock the wait event | |
515 | */ | |
dd0813b6 | 516 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 517 | |
53af545b BP |
518 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
519 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 520 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 521 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 522 | |
bd60c33e | 523 | if (requestHeader->MessageType == ChannelMessageOpenChannel) { |
82250213 | 524 | openMsg = (struct vmbus_channel_open_channel *)msgInfo->Msg; |
3e7ee490 | 525 | if (openMsg->ChildRelId == result->ChildRelId && |
bd60c33e GKH |
526 | openMsg->OpenId == result->OpenId) { |
527 | memcpy(&msgInfo->Response.OpenResult, | |
528 | result, | |
529 | sizeof(struct vmbus_channel_open_result)); | |
bfc30aae | 530 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
531 | break; |
532 | } | |
533 | } | |
534 | } | |
dd0813b6 | 535 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
536 | |
537 | DPRINT_EXIT(VMBUS); | |
538 | } | |
539 | ||
3e189519 | 540 | /* |
bd60c33e GKH |
541 | * VmbusChannelOnGpadlCreated - GPADL created handler. |
542 | * | |
543 | * This is invoked when we received a response to our gpadl create request. | |
544 | * Find the matching request, copy the response and signal the requesting | |
545 | * thread. | |
546 | */ | |
82250213 | 547 | static void VmbusChannelOnGpadlCreated(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 548 | { |
bd60c33e | 549 | struct vmbus_channel_gpadl_created *gpadlCreated; |
53af545b | 550 | struct list_head *curr; |
aded7165 | 551 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
552 | struct vmbus_channel_message_header *requestHeader; |
553 | struct vmbus_channel_gpadl_header *gpadlHeader; | |
dd0813b6 | 554 | unsigned long flags; |
3e7ee490 HJ |
555 | |
556 | DPRINT_ENTER(VMBUS); | |
557 | ||
bd60c33e GKH |
558 | gpadlCreated = (struct vmbus_channel_gpadl_created *)hdr; |
559 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", | |
560 | gpadlCreated->CreationStatus); | |
3e7ee490 | 561 | |
bd60c33e GKH |
562 | /* |
563 | * Find the establish msg, copy the result and signal/unblock the wait | |
564 | * event | |
565 | */ | |
dd0813b6 | 566 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 567 | |
53af545b BP |
568 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
569 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 570 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 571 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 572 | |
bd60c33e | 573 | if (requestHeader->MessageType == ChannelMessageGpadlHeader) { |
82250213 | 574 | gpadlHeader = (struct vmbus_channel_gpadl_header *)requestHeader; |
3e7ee490 | 575 | |
bd60c33e GKH |
576 | if ((gpadlCreated->ChildRelId == |
577 | gpadlHeader->ChildRelId) && | |
578 | (gpadlCreated->Gpadl == gpadlHeader->Gpadl)) { | |
579 | memcpy(&msgInfo->Response.GpadlCreated, | |
580 | gpadlCreated, | |
581 | sizeof(struct vmbus_channel_gpadl_created)); | |
bfc30aae | 582 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
583 | break; |
584 | } | |
585 | } | |
586 | } | |
dd0813b6 | 587 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
588 | |
589 | DPRINT_EXIT(VMBUS); | |
590 | } | |
591 | ||
3e189519 | 592 | /* |
bd60c33e GKH |
593 | * VmbusChannelOnGpadlTorndown - GPADL torndown handler. |
594 | * | |
595 | * This is invoked when we received a response to our gpadl teardown request. | |
596 | * Find the matching request, copy the response and signal the requesting | |
597 | * thread. | |
598 | */ | |
599 | static void VmbusChannelOnGpadlTorndown( | |
600 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 601 | { |
bd60c33e | 602 | struct vmbus_channel_gpadl_torndown *gpadlTorndown; |
53af545b | 603 | struct list_head *curr; |
aded7165 | 604 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
605 | struct vmbus_channel_message_header *requestHeader; |
606 | struct vmbus_channel_gpadl_teardown *gpadlTeardown; | |
dd0813b6 | 607 | unsigned long flags; |
3e7ee490 HJ |
608 | |
609 | DPRINT_ENTER(VMBUS); | |
610 | ||
bd60c33e GKH |
611 | gpadlTorndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
612 | ||
613 | /* | |
614 | * Find the open msg, copy the result and signal/unblock the wait event | |
615 | */ | |
dd0813b6 | 616 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 617 | |
53af545b BP |
618 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
619 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 620 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 621 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 622 | |
bd60c33e | 623 | if (requestHeader->MessageType == ChannelMessageGpadlTeardown) { |
82250213 | 624 | gpadlTeardown = (struct vmbus_channel_gpadl_teardown *)requestHeader; |
3e7ee490 | 625 | |
bd60c33e GKH |
626 | if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl) { |
627 | memcpy(&msgInfo->Response.GpadlTorndown, | |
628 | gpadlTorndown, | |
629 | sizeof(struct vmbus_channel_gpadl_torndown)); | |
bfc30aae | 630 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
631 | break; |
632 | } | |
633 | } | |
634 | } | |
dd0813b6 | 635 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
636 | |
637 | DPRINT_EXIT(VMBUS); | |
638 | } | |
639 | ||
3e189519 | 640 | /* |
bd60c33e GKH |
641 | * VmbusChannelOnVersionResponse - Version response handler |
642 | * | |
643 | * This is invoked when we received a response to our initiate contact request. | |
644 | * Find the matching request, copy the response and signal the requesting | |
645 | * thread. | |
646 | */ | |
647 | static void VmbusChannelOnVersionResponse( | |
648 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 649 | { |
53af545b | 650 | struct list_head *curr; |
aded7165 | 651 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
652 | struct vmbus_channel_message_header *requestHeader; |
653 | struct vmbus_channel_initiate_contact *initiate; | |
bd60c33e | 654 | struct vmbus_channel_version_response *versionResponse; |
dd0813b6 | 655 | unsigned long flags; |
3e7ee490 HJ |
656 | |
657 | DPRINT_ENTER(VMBUS); | |
658 | ||
bd60c33e | 659 | versionResponse = (struct vmbus_channel_version_response *)hdr; |
dd0813b6 | 660 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 661 | |
53af545b BP |
662 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
663 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 664 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 665 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 666 | |
bd60c33e GKH |
667 | if (requestHeader->MessageType == |
668 | ChannelMessageInitiateContact) { | |
82250213 | 669 | initiate = (struct vmbus_channel_initiate_contact *)requestHeader; |
bd60c33e GKH |
670 | memcpy(&msgInfo->Response.VersionResponse, |
671 | versionResponse, | |
672 | sizeof(struct vmbus_channel_version_response)); | |
bfc30aae | 673 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
674 | } |
675 | } | |
dd0813b6 | 676 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
677 | |
678 | DPRINT_EXIT(VMBUS); | |
679 | } | |
680 | ||
c8212f04 GKH |
681 | /* Channel message dispatch table */ |
682 | static struct vmbus_channel_message_table_entry | |
683 | gChannelMessageTable[ChannelMessageCount] = { | |
684 | {ChannelMessageInvalid, NULL}, | |
685 | {ChannelMessageOfferChannel, VmbusChannelOnOffer}, | |
686 | {ChannelMessageRescindChannelOffer, VmbusChannelOnOfferRescind}, | |
687 | {ChannelMessageRequestOffers, NULL}, | |
688 | {ChannelMessageAllOffersDelivered, VmbusChannelOnOffersDelivered}, | |
689 | {ChannelMessageOpenChannel, NULL}, | |
690 | {ChannelMessageOpenChannelResult, VmbusChannelOnOpenResult}, | |
691 | {ChannelMessageCloseChannel, NULL}, | |
692 | {ChannelMessageGpadlHeader, NULL}, | |
693 | {ChannelMessageGpadlBody, NULL}, | |
694 | {ChannelMessageGpadlCreated, VmbusChannelOnGpadlCreated}, | |
695 | {ChannelMessageGpadlTeardown, NULL}, | |
696 | {ChannelMessageGpadlTorndown, VmbusChannelOnGpadlTorndown}, | |
697 | {ChannelMessageRelIdReleased, NULL}, | |
698 | {ChannelMessageInitiateContact, NULL}, | |
699 | {ChannelMessageVersionResponse, VmbusChannelOnVersionResponse}, | |
700 | {ChannelMessageUnload, NULL}, | |
701 | }; | |
702 | ||
3e189519 | 703 | /* |
bd60c33e GKH |
704 | * VmbusOnChannelMessage - Handler for channel protocol messages. |
705 | * | |
706 | * This is invoked in the vmbus worker thread context. | |
707 | */ | |
b239549c | 708 | void VmbusOnChannelMessage(void *Context) |
3e7ee490 | 709 | { |
eacb1b4d | 710 | struct hv_message *msg = Context; |
82250213 | 711 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
712 | int size; |
713 | ||
714 | DPRINT_ENTER(VMBUS); | |
715 | ||
82250213 | 716 | hdr = (struct vmbus_channel_message_header *)msg->u.Payload; |
bd60c33e | 717 | size = msg->Header.PayloadSize; |
3e7ee490 HJ |
718 | |
719 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->MessageType, size); | |
720 | ||
bd60c33e GKH |
721 | if (hdr->MessageType >= ChannelMessageCount) { |
722 | DPRINT_ERR(VMBUS, | |
723 | "Received invalid channel message type %d size %d", | |
724 | hdr->MessageType, size); | |
04f50c4d GKH |
725 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
726 | (unsigned char *)msg->u.Payload, size); | |
8c69f52a | 727 | kfree(msg); |
3e7ee490 HJ |
728 | return; |
729 | } | |
730 | ||
731 | if (gChannelMessageTable[hdr->MessageType].messageHandler) | |
3e7ee490 | 732 | gChannelMessageTable[hdr->MessageType].messageHandler(hdr); |
3e7ee490 | 733 | else |
bd60c33e GKH |
734 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", |
735 | hdr->MessageType); | |
3e7ee490 | 736 | |
454f18a9 | 737 | /* Free the msg that was allocated in VmbusOnMsgDPC() */ |
8c69f52a | 738 | kfree(msg); |
3e7ee490 HJ |
739 | DPRINT_EXIT(VMBUS); |
740 | } | |
741 | ||
3e189519 | 742 | /* |
bd60c33e GKH |
743 | * VmbusChannelRequestOffers - Send a request to get all our pending offers. |
744 | */ | |
b239549c | 745 | int VmbusChannelRequestOffers(void) |
3e7ee490 | 746 | { |
82250213 | 747 | struct vmbus_channel_message_header *msg; |
aded7165 | 748 | struct vmbus_channel_msginfo *msgInfo; |
bd60c33e | 749 | int ret; |
3e7ee490 HJ |
750 | |
751 | DPRINT_ENTER(VMBUS); | |
752 | ||
bd60c33e GKH |
753 | msgInfo = kmalloc(sizeof(*msgInfo) + |
754 | sizeof(struct vmbus_channel_message_header), | |
755 | GFP_KERNEL); | |
3e7ee490 HJ |
756 | ASSERT(msgInfo != NULL); |
757 | ||
bfc30aae | 758 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 759 | msg = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
760 | |
761 | msg->MessageType = ChannelMessageRequestOffers; | |
762 | ||
763 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
bd60c33e GKH |
764 | INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, |
765 | &msgInfo->msgListEntry); | |
3e7ee490 HJ |
766 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ |
767 | ||
bd60c33e GKH |
768 | ret = VmbusPostMessage(msg, |
769 | sizeof(struct vmbus_channel_message_header)); | |
770 | if (ret != 0) { | |
3e7ee490 HJ |
771 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); |
772 | ||
773 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
774 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
775 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
776 | ||
777 | goto Cleanup; | |
778 | } | |
bfc30aae | 779 | /* osd_WaitEventWait(msgInfo->waitEvent); */ |
3e7ee490 HJ |
780 | |
781 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
782 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
783 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
784 | ||
785 | ||
786 | Cleanup: | |
bd60c33e | 787 | if (msgInfo) { |
420beac4 | 788 | kfree(msgInfo->WaitEvent); |
8c69f52a | 789 | kfree(msgInfo); |
3e7ee490 HJ |
790 | } |
791 | ||
792 | DPRINT_EXIT(VMBUS); | |
3e7ee490 HJ |
793 | return ret; |
794 | } | |
795 | ||
3e189519 HJ |
796 | /* |
797 | * VmbusChannelReleaseUnattachedChannels - Release channels that are | |
798 | * unattached/unconnected ie (no drivers associated) | |
bd60c33e | 799 | */ |
b239549c | 800 | void VmbusChannelReleaseUnattachedChannels(void) |
3e7ee490 | 801 | { |
53af545b | 802 | struct vmbus_channel *channel, *pos; |
aded7165 | 803 | struct vmbus_channel *start = NULL; |
0f5e44ca | 804 | unsigned long flags; |
3e7ee490 | 805 | |
0f5e44ca | 806 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 807 | |
53af545b BP |
808 | list_for_each_entry_safe(channel, pos, &gVmbusConnection.ChannelList, |
809 | ListEntry) { | |
3e7ee490 HJ |
810 | if (channel == start) |
811 | break; | |
812 | ||
bd60c33e | 813 | if (!channel->DeviceObject->Driver) { |
53af545b | 814 | list_del(&channel->ListEntry); |
bd60c33e GKH |
815 | DPRINT_INFO(VMBUS, |
816 | "Releasing unattached device object %p", | |
817 | channel->DeviceObject); | |
3e7ee490 HJ |
818 | |
819 | VmbusChildDeviceRemove(channel->DeviceObject); | |
820 | FreeVmbusChannel(channel); | |
bd60c33e | 821 | } else { |
3e7ee490 | 822 | if (!start) |
3e7ee490 | 823 | start = channel; |
3e7ee490 HJ |
824 | } |
825 | } | |
826 | ||
0f5e44ca | 827 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
828 | } |
829 | ||
454f18a9 | 830 | /* eof */ |