]>
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 | |
39c4e9c3 HZ |
36 | #define MAX_MSG_TYPES 2 |
37 | #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 6 | |
c88c4e4c | 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 | }, | |
39c4e9c3 HZ |
84 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ |
85 | /* TimeSync */ | |
86 | { | |
87 | .data = { | |
88 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
89 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
90 | } | |
91 | }, | |
3e7ee490 HJ |
92 | }; |
93 | ||
c88c4e4c HJ |
94 | |
95 | /** | |
96 | * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message | |
97 | * @icmsghdrp: Pointer to msg header structure | |
98 | * @icmsg_negotiate: Pointer to negotiate message structure | |
99 | * @buf: Raw buffer channel data | |
100 | * | |
101 | * @icmsghdrp is of type &struct icmsg_hdr. | |
102 | * @negop is of type &struct icmsg_negotiate. | |
103 | * Set up and fill in default negotiate response message. This response can | |
104 | * come from both the vmbus driver and the hv_utils driver. The current api | |
105 | * will respond properly to both Windows 2008 and Windows 2008-R2 operating | |
106 | * systems. | |
107 | * | |
108 | * Mainly used by Hyper-V drivers. | |
109 | */ | |
110 | void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, | |
111 | struct icmsg_negotiate *negop, | |
112 | u8 *buf) | |
113 | { | |
114 | if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { | |
115 | icmsghdrp->icmsgsize = 0x10; | |
116 | ||
117 | negop = (struct icmsg_negotiate *)&buf[ | |
118 | sizeof(struct vmbuspipe_hdr) + | |
119 | sizeof(struct icmsg_hdr)]; | |
120 | ||
121 | if (negop->icframe_vercnt == 2 && | |
122 | negop->icversion_data[1].major == 3) { | |
123 | negop->icversion_data[0].major = 3; | |
124 | negop->icversion_data[0].minor = 0; | |
125 | negop->icversion_data[1].major = 3; | |
126 | negop->icversion_data[1].minor = 0; | |
127 | } else { | |
128 | negop->icversion_data[0].major = 1; | |
129 | negop->icversion_data[0].minor = 0; | |
130 | negop->icversion_data[1].major = 1; | |
131 | negop->icversion_data[1].minor = 0; | |
132 | } | |
133 | ||
134 | negop->icframe_vercnt = 1; | |
135 | negop->icmsg_vercnt = 1; | |
136 | } | |
137 | } | |
138 | EXPORT_SYMBOL(prep_negotiate_resp); | |
139 | ||
140 | /** | |
141 | * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK | |
142 | * Hyper-V requests | |
143 | * @context: Pointer to argument structure. | |
144 | * | |
145 | * Set up the default handler for non device driver specific requests | |
146 | * from Hyper-V. This stub responds to the default negotiate messages | |
147 | * that come in for every non IDE/SCSI/Network request. | |
148 | * This behavior is normally overwritten in the hv_utils driver. That | |
149 | * driver handles requests like gracefull shutdown, heartbeats etc. | |
150 | * | |
151 | * Mainly used by Hyper-V drivers. | |
152 | */ | |
153 | void chn_cb_negotiate(void *context) | |
154 | { | |
155 | struct vmbus_channel *channel = context; | |
156 | u8 *buf; | |
157 | u32 buflen, recvlen; | |
158 | u64 requestid; | |
159 | ||
160 | struct icmsg_hdr *icmsghdrp; | |
161 | struct icmsg_negotiate *negop = NULL; | |
162 | ||
163 | buflen = PAGE_SIZE; | |
164 | buf = kmalloc(buflen, GFP_ATOMIC); | |
165 | ||
166 | VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid); | |
167 | ||
168 | if (recvlen > 0) { | |
169 | icmsghdrp = (struct icmsg_hdr *)&buf[ | |
170 | sizeof(struct vmbuspipe_hdr)]; | |
171 | ||
172 | prep_negotiate_resp(icmsghdrp, negop, buf); | |
173 | ||
174 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | |
175 | | ICMSGHDRFLAG_RESPONSE; | |
176 | ||
177 | VmbusChannelSendPacket(channel, buf, | |
178 | recvlen, requestid, | |
179 | VmbusPacketTypeDataInBand, 0); | |
180 | } | |
181 | ||
182 | kfree(buf); | |
183 | } | |
184 | EXPORT_SYMBOL(chn_cb_negotiate); | |
185 | ||
186 | /* | |
187 | * Function table used for message responses for non IDE/SCSI/Network type | |
188 | * messages. (Such as KVP/Shutdown etc) | |
189 | */ | |
190 | struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = { | |
191 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ | |
192 | /* Shutdown */ | |
193 | { | |
194 | .msg_type = HV_SHUTDOWN_MSG, | |
195 | .data = { | |
196 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
197 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
198 | }, | |
199 | .callback = chn_cb_negotiate, | |
200 | .log_msg = "Shutdown channel functionality initialized" | |
201 | }, | |
39c4e9c3 HZ |
202 | |
203 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ | |
204 | /* TimeSync */ | |
205 | { | |
206 | .msg_type = HV_TIMESYNC_MSG, | |
207 | .data = { | |
208 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
209 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
210 | }, | |
211 | .callback = chn_cb_negotiate, | |
212 | .log_msg = "Timesync channel functionality initialized" | |
213 | }, | |
c88c4e4c HJ |
214 | }; |
215 | EXPORT_SYMBOL(hv_cb_utils); | |
216 | ||
3e189519 | 217 | /* |
bd60c33e GKH |
218 | * AllocVmbusChannel - Allocate and initialize a vmbus channel object |
219 | */ | |
aded7165 | 220 | struct vmbus_channel *AllocVmbusChannel(void) |
3e7ee490 | 221 | { |
aded7165 | 222 | struct vmbus_channel *channel; |
3e7ee490 | 223 | |
aded7165 | 224 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
3e7ee490 | 225 | if (!channel) |
3e7ee490 | 226 | return NULL; |
3e7ee490 | 227 | |
54411c42 | 228 | spin_lock_init(&channel->inbound_lock); |
3e7ee490 | 229 | |
c8a429a4 GKH |
230 | init_timer(&channel->poll_timer); |
231 | channel->poll_timer.data = (unsigned long)channel; | |
232 | channel->poll_timer.function = VmbusChannelOnTimer; | |
3e7ee490 | 233 | |
de65a384 | 234 | channel->ControlWQ = create_workqueue("hv_vmbus_ctl"); |
bd60c33e | 235 | if (!channel->ControlWQ) { |
8c69f52a | 236 | kfree(channel); |
3e7ee490 HJ |
237 | return NULL; |
238 | } | |
239 | ||
240 | return channel; | |
241 | } | |
242 | ||
3e189519 | 243 | /* |
bd60c33e GKH |
244 | * ReleaseVmbusChannel - Release the vmbus channel object itself |
245 | */ | |
246 | static inline void ReleaseVmbusChannel(void *context) | |
3e7ee490 | 247 | { |
bd60c33e | 248 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
249 | |
250 | DPRINT_ENTER(VMBUS); | |
251 | ||
252 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); | |
de65a384 | 253 | destroy_workqueue(channel->ControlWQ); |
3e7ee490 HJ |
254 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
255 | ||
8c69f52a | 256 | kfree(channel); |
3e7ee490 HJ |
257 | |
258 | DPRINT_EXIT(VMBUS); | |
259 | } | |
260 | ||
3e189519 | 261 | /* |
bd60c33e GKH |
262 | * FreeVmbusChannel - Release the resources used by the vmbus channel object |
263 | */ | |
aded7165 | 264 | void FreeVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 | 265 | { |
5996b3dd | 266 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 267 | |
bd60c33e GKH |
268 | /* |
269 | * We have to release the channel's workqueue/thread in the vmbus's | |
270 | * workqueue/thread context | |
271 | * ie we can't destroy ourselves. | |
272 | */ | |
de65a384 | 273 | osd_schedule_callback(gVmbusConnection.WorkQueue, ReleaseVmbusChannel, |
bd60c33e | 274 | Channel); |
3e7ee490 HJ |
275 | } |
276 | ||
3e189519 | 277 | /* |
c88c4e4c HJ |
278 | * VmbusChannelProcessOffer - Process the offer by creating a channel/device |
279 | * associated with this offer | |
bd60c33e GKH |
280 | */ |
281 | static void VmbusChannelProcessOffer(void *context) | |
3e7ee490 | 282 | { |
aded7165 GKH |
283 | struct vmbus_channel *newChannel = context; |
284 | struct vmbus_channel *channel; | |
0e727613 | 285 | bool fNew = true; |
bd60c33e | 286 | int ret; |
c88c4e4c | 287 | int cnt; |
0f5e44ca | 288 | unsigned long flags; |
3e7ee490 HJ |
289 | |
290 | DPRINT_ENTER(VMBUS); | |
291 | ||
454f18a9 | 292 | /* Make sure this is a new offer */ |
0f5e44ca | 293 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 294 | |
53af545b | 295 | list_for_each_entry(channel, &gVmbusConnection.ChannelList, ListEntry) { |
bd60c33e GKH |
296 | if (!memcmp(&channel->OfferMsg.Offer.InterfaceType, |
297 | &newChannel->OfferMsg.Offer.InterfaceType, | |
298 | sizeof(struct hv_guid)) && | |
299 | !memcmp(&channel->OfferMsg.Offer.InterfaceInstance, | |
300 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
301 | sizeof(struct hv_guid))) { | |
0e727613 | 302 | fNew = false; |
3e7ee490 HJ |
303 | break; |
304 | } | |
305 | } | |
306 | ||
307 | if (fNew) | |
53af545b BP |
308 | list_add_tail(&newChannel->ListEntry, |
309 | &gVmbusConnection.ChannelList); | |
bd60c33e | 310 | |
0f5e44ca | 311 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 312 | |
bd60c33e GKH |
313 | if (!fNew) { |
314 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", | |
315 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 HJ |
316 | FreeVmbusChannel(newChannel); |
317 | DPRINT_EXIT(VMBUS); | |
318 | return; | |
319 | } | |
320 | ||
bd60c33e GKH |
321 | /* |
322 | * Start the process of binding this offer to the driver | |
323 | * We need to set the DeviceObject field before calling | |
324 | * VmbusChildDeviceAdd() | |
325 | */ | |
3e7ee490 | 326 | newChannel->DeviceObject = VmbusChildDeviceCreate( |
daaa8cc3 GKH |
327 | &newChannel->OfferMsg.Offer.InterfaceType, |
328 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
3e7ee490 HJ |
329 | newChannel); |
330 | ||
bd60c33e GKH |
331 | DPRINT_DBG(VMBUS, "child device object allocated - %p", |
332 | newChannel->DeviceObject); | |
3e7ee490 | 333 | |
454f18a9 BP |
334 | /* |
335 | * Add the new device to the bus. This will kick off device-driver | |
336 | * binding which eventually invokes the device driver's AddDevice() | |
337 | * method. | |
338 | */ | |
3e7ee490 | 339 | ret = VmbusChildDeviceAdd(newChannel->DeviceObject); |
bd60c33e GKH |
340 | if (ret != 0) { |
341 | DPRINT_ERR(VMBUS, | |
342 | "unable to add child device object (relid %d)", | |
343 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 | 344 | |
0f5e44ca | 345 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 346 | list_del(&newChannel->ListEntry); |
0f5e44ca | 347 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
348 | |
349 | FreeVmbusChannel(newChannel); | |
bd60c33e | 350 | } else { |
454f18a9 BP |
351 | /* |
352 | * This state is used to indicate a successful open | |
353 | * so that when we do close the channel normally, we | |
354 | * can cleanup properly | |
355 | */ | |
3e7ee490 | 356 | newChannel->State = CHANNEL_OPEN_STATE; |
c88c4e4c HJ |
357 | cnt = 0; |
358 | ||
359 | while (cnt != MAX_MSG_TYPES) { | |
360 | if (memcmp(&newChannel->OfferMsg.Offer.InterfaceType, | |
361 | &hv_cb_utils[cnt].data, | |
362 | sizeof(struct hv_guid)) == 0) { | |
363 | DPRINT_INFO(VMBUS, "%s", | |
364 | hv_cb_utils[cnt].log_msg); | |
365 | ||
366 | if (VmbusChannelOpen(newChannel, 2 * PAGE_SIZE, | |
367 | 2 * PAGE_SIZE, NULL, 0, | |
368 | hv_cb_utils[cnt].callback, | |
369 | newChannel) == 0) | |
370 | hv_cb_utils[cnt].channel = newChannel; | |
371 | } | |
372 | cnt++; | |
373 | } | |
3e7ee490 HJ |
374 | } |
375 | DPRINT_EXIT(VMBUS); | |
376 | } | |
377 | ||
3e189519 | 378 | /* |
bd60c33e GKH |
379 | * VmbusChannelProcessRescindOffer - Rescind the offer by initiating a device removal |
380 | */ | |
381 | static void VmbusChannelProcessRescindOffer(void *context) | |
3e7ee490 | 382 | { |
aded7165 | 383 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
384 | |
385 | DPRINT_ENTER(VMBUS); | |
3e7ee490 | 386 | VmbusChildDeviceRemove(channel->DeviceObject); |
3e7ee490 HJ |
387 | DPRINT_EXIT(VMBUS); |
388 | } | |
389 | ||
3e189519 | 390 | /* |
bd60c33e GKH |
391 | * VmbusChannelOnOffer - Handler for channel offers from vmbus in parent partition. |
392 | * | |
393 | * We ignore all offers except network and storage offers. For each network and | |
394 | * storage offers, we create a channel object and queue a work item to the | |
395 | * channel object to process the offer synchronously | |
396 | */ | |
82250213 | 397 | static void VmbusChannelOnOffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 398 | { |
bd60c33e | 399 | struct vmbus_channel_offer_channel *offer; |
aded7165 | 400 | struct vmbus_channel *newChannel; |
caf26a31 GKH |
401 | struct hv_guid *guidType; |
402 | struct hv_guid *guidInstance; | |
3e7ee490 | 403 | int i; |
bd60c33e | 404 | int fSupported = 0; |
3e7ee490 HJ |
405 | |
406 | DPRINT_ENTER(VMBUS); | |
407 | ||
bd60c33e GKH |
408 | offer = (struct vmbus_channel_offer_channel *)hdr; |
409 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
410 | if (memcmp(&offer->Offer.InterfaceType, | |
411 | &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { | |
3e7ee490 HJ |
412 | fSupported = 1; |
413 | break; | |
414 | } | |
415 | } | |
416 | ||
bd60c33e GKH |
417 | if (!fSupported) { |
418 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " | |
419 | "child relid %d", offer->ChildRelId); | |
3e7ee490 | 420 | DPRINT_EXIT(VMBUS); |
3e7ee490 HJ |
421 | return; |
422 | } | |
423 | ||
424 | guidType = &offer->Offer.InterfaceType; | |
425 | guidInstance = &offer->Offer.InterfaceInstance; | |
426 | ||
bd60c33e GKH |
427 | DPRINT_INFO(VMBUS, "Channel offer notification - " |
428 | "child relid %d monitor id %d allocated %d, " | |
429 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
430 | "%02x%02x%02x%02x%02x%02x%02x%02x} " | |
431 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
432 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
433 | offer->ChildRelId, offer->MonitorId, | |
434 | offer->MonitorAllocated, | |
435 | guidType->data[3], guidType->data[2], | |
436 | guidType->data[1], guidType->data[0], | |
437 | guidType->data[5], guidType->data[4], | |
438 | guidType->data[7], guidType->data[6], | |
439 | guidType->data[8], guidType->data[9], | |
440 | guidType->data[10], guidType->data[11], | |
441 | guidType->data[12], guidType->data[13], | |
442 | guidType->data[14], guidType->data[15], | |
443 | guidInstance->data[3], guidInstance->data[2], | |
444 | guidInstance->data[1], guidInstance->data[0], | |
445 | guidInstance->data[5], guidInstance->data[4], | |
446 | guidInstance->data[7], guidInstance->data[6], | |
447 | guidInstance->data[8], guidInstance->data[9], | |
448 | guidInstance->data[10], guidInstance->data[11], | |
449 | guidInstance->data[12], guidInstance->data[13], | |
450 | guidInstance->data[14], guidInstance->data[15]); | |
3e7ee490 | 451 | |
454f18a9 | 452 | /* Allocate the channel object and save this offer. */ |
3e7ee490 | 453 | newChannel = AllocVmbusChannel(); |
bd60c33e | 454 | if (!newChannel) { |
3e7ee490 HJ |
455 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); |
456 | return; | |
457 | } | |
458 | ||
459 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newChannel); | |
460 | ||
bd60c33e GKH |
461 | memcpy(&newChannel->OfferMsg, offer, |
462 | sizeof(struct vmbus_channel_offer_channel)); | |
5654e932 GKH |
463 | newChannel->MonitorGroup = (u8)offer->MonitorId / 32; |
464 | newChannel->MonitorBit = (u8)offer->MonitorId % 32; | |
3e7ee490 | 465 | |
454f18a9 | 466 | /* TODO: Make sure the offer comes from our parent partition */ |
de65a384 BP |
467 | osd_schedule_callback(newChannel->ControlWQ, VmbusChannelProcessOffer, |
468 | newChannel); | |
3e7ee490 HJ |
469 | |
470 | DPRINT_EXIT(VMBUS); | |
471 | } | |
472 | ||
3e189519 | 473 | /* |
bd60c33e GKH |
474 | * VmbusChannelOnOfferRescind - Rescind offer handler. |
475 | * | |
476 | * We queue a work item to process this offer synchronously | |
477 | */ | |
82250213 | 478 | static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 479 | { |
bd60c33e | 480 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 481 | struct vmbus_channel *channel; |
3e7ee490 HJ |
482 | |
483 | DPRINT_ENTER(VMBUS); | |
484 | ||
bd60c33e | 485 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
3e7ee490 | 486 | channel = GetChannelFromRelId(rescind->ChildRelId); |
bd60c33e GKH |
487 | if (channel == NULL) { |
488 | DPRINT_DBG(VMBUS, "channel not found for relId %d", | |
489 | rescind->ChildRelId); | |
3e7ee490 HJ |
490 | return; |
491 | } | |
492 | ||
de65a384 BP |
493 | osd_schedule_callback(channel->ControlWQ, |
494 | VmbusChannelProcessRescindOffer, | |
495 | channel); | |
3e7ee490 HJ |
496 | |
497 | DPRINT_EXIT(VMBUS); | |
498 | } | |
499 | ||
3e189519 | 500 | /* |
bd60c33e GKH |
501 | * VmbusChannelOnOffersDelivered - This is invoked when all offers have been delivered. |
502 | * | |
503 | * Nothing to do here. | |
504 | */ | |
505 | static void VmbusChannelOnOffersDelivered( | |
506 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 HJ |
507 | { |
508 | DPRINT_ENTER(VMBUS); | |
509 | DPRINT_EXIT(VMBUS); | |
510 | } | |
511 | ||
3e189519 | 512 | /* |
bd60c33e GKH |
513 | * VmbusChannelOnOpenResult - Open result handler. |
514 | * | |
515 | * This is invoked when we received a response to our channel open request. | |
516 | * Find the matching request, copy the response and signal the requesting | |
517 | * thread. | |
518 | */ | |
82250213 | 519 | static void VmbusChannelOnOpenResult(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 520 | { |
bd60c33e | 521 | struct vmbus_channel_open_result *result; |
53af545b | 522 | struct list_head *curr; |
aded7165 | 523 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
524 | struct vmbus_channel_message_header *requestHeader; |
525 | struct vmbus_channel_open_channel *openMsg; | |
dd0813b6 | 526 | unsigned long flags; |
3e7ee490 HJ |
527 | |
528 | DPRINT_ENTER(VMBUS); | |
529 | ||
bd60c33e | 530 | result = (struct vmbus_channel_open_result *)hdr; |
3e7ee490 HJ |
531 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status); |
532 | ||
bd60c33e GKH |
533 | /* |
534 | * Find the open msg, copy the result and signal/unblock the wait event | |
535 | */ | |
dd0813b6 | 536 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 537 | |
53af545b BP |
538 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
539 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 540 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 541 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 542 | |
bd60c33e | 543 | if (requestHeader->MessageType == ChannelMessageOpenChannel) { |
82250213 | 544 | openMsg = (struct vmbus_channel_open_channel *)msgInfo->Msg; |
3e7ee490 | 545 | if (openMsg->ChildRelId == result->ChildRelId && |
bd60c33e GKH |
546 | openMsg->OpenId == result->OpenId) { |
547 | memcpy(&msgInfo->Response.OpenResult, | |
548 | result, | |
549 | sizeof(struct vmbus_channel_open_result)); | |
bfc30aae | 550 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
551 | break; |
552 | } | |
553 | } | |
554 | } | |
dd0813b6 | 555 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
556 | |
557 | DPRINT_EXIT(VMBUS); | |
558 | } | |
559 | ||
3e189519 | 560 | /* |
bd60c33e GKH |
561 | * VmbusChannelOnGpadlCreated - GPADL created handler. |
562 | * | |
563 | * This is invoked when we received a response to our gpadl create request. | |
564 | * Find the matching request, copy the response and signal the requesting | |
565 | * thread. | |
566 | */ | |
82250213 | 567 | static void VmbusChannelOnGpadlCreated(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 568 | { |
bd60c33e | 569 | struct vmbus_channel_gpadl_created *gpadlCreated; |
53af545b | 570 | struct list_head *curr; |
aded7165 | 571 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
572 | struct vmbus_channel_message_header *requestHeader; |
573 | struct vmbus_channel_gpadl_header *gpadlHeader; | |
dd0813b6 | 574 | unsigned long flags; |
3e7ee490 HJ |
575 | |
576 | DPRINT_ENTER(VMBUS); | |
577 | ||
bd60c33e GKH |
578 | gpadlCreated = (struct vmbus_channel_gpadl_created *)hdr; |
579 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", | |
580 | gpadlCreated->CreationStatus); | |
3e7ee490 | 581 | |
bd60c33e GKH |
582 | /* |
583 | * Find the establish msg, copy the result and signal/unblock the wait | |
584 | * event | |
585 | */ | |
dd0813b6 | 586 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 587 | |
53af545b BP |
588 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
589 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 590 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 591 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 592 | |
bd60c33e | 593 | if (requestHeader->MessageType == ChannelMessageGpadlHeader) { |
82250213 | 594 | gpadlHeader = (struct vmbus_channel_gpadl_header *)requestHeader; |
3e7ee490 | 595 | |
bd60c33e GKH |
596 | if ((gpadlCreated->ChildRelId == |
597 | gpadlHeader->ChildRelId) && | |
598 | (gpadlCreated->Gpadl == gpadlHeader->Gpadl)) { | |
599 | memcpy(&msgInfo->Response.GpadlCreated, | |
600 | gpadlCreated, | |
601 | sizeof(struct vmbus_channel_gpadl_created)); | |
bfc30aae | 602 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
603 | break; |
604 | } | |
605 | } | |
606 | } | |
dd0813b6 | 607 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
608 | |
609 | DPRINT_EXIT(VMBUS); | |
610 | } | |
611 | ||
3e189519 | 612 | /* |
bd60c33e GKH |
613 | * VmbusChannelOnGpadlTorndown - GPADL torndown handler. |
614 | * | |
615 | * This is invoked when we received a response to our gpadl teardown request. | |
616 | * Find the matching request, copy the response and signal the requesting | |
617 | * thread. | |
618 | */ | |
619 | static void VmbusChannelOnGpadlTorndown( | |
620 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 621 | { |
bd60c33e | 622 | struct vmbus_channel_gpadl_torndown *gpadlTorndown; |
53af545b | 623 | struct list_head *curr; |
aded7165 | 624 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
625 | struct vmbus_channel_message_header *requestHeader; |
626 | struct vmbus_channel_gpadl_teardown *gpadlTeardown; | |
dd0813b6 | 627 | unsigned long flags; |
3e7ee490 HJ |
628 | |
629 | DPRINT_ENTER(VMBUS); | |
630 | ||
bd60c33e GKH |
631 | gpadlTorndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
632 | ||
633 | /* | |
634 | * Find the open msg, copy the result and signal/unblock the wait event | |
635 | */ | |
dd0813b6 | 636 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 637 | |
53af545b BP |
638 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
639 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 640 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 641 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 642 | |
bd60c33e | 643 | if (requestHeader->MessageType == ChannelMessageGpadlTeardown) { |
82250213 | 644 | gpadlTeardown = (struct vmbus_channel_gpadl_teardown *)requestHeader; |
3e7ee490 | 645 | |
bd60c33e GKH |
646 | if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl) { |
647 | memcpy(&msgInfo->Response.GpadlTorndown, | |
648 | gpadlTorndown, | |
649 | sizeof(struct vmbus_channel_gpadl_torndown)); | |
bfc30aae | 650 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
651 | break; |
652 | } | |
653 | } | |
654 | } | |
dd0813b6 | 655 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
656 | |
657 | DPRINT_EXIT(VMBUS); | |
658 | } | |
659 | ||
3e189519 | 660 | /* |
bd60c33e GKH |
661 | * VmbusChannelOnVersionResponse - Version response handler |
662 | * | |
663 | * This is invoked when we received a response to our initiate contact request. | |
664 | * Find the matching request, copy the response and signal the requesting | |
665 | * thread. | |
666 | */ | |
667 | static void VmbusChannelOnVersionResponse( | |
668 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 669 | { |
53af545b | 670 | struct list_head *curr; |
aded7165 | 671 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
672 | struct vmbus_channel_message_header *requestHeader; |
673 | struct vmbus_channel_initiate_contact *initiate; | |
bd60c33e | 674 | struct vmbus_channel_version_response *versionResponse; |
dd0813b6 | 675 | unsigned long flags; |
3e7ee490 HJ |
676 | |
677 | DPRINT_ENTER(VMBUS); | |
678 | ||
bd60c33e | 679 | versionResponse = (struct vmbus_channel_version_response *)hdr; |
dd0813b6 | 680 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 681 | |
53af545b BP |
682 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
683 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 684 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 685 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 686 | |
bd60c33e GKH |
687 | if (requestHeader->MessageType == |
688 | ChannelMessageInitiateContact) { | |
82250213 | 689 | initiate = (struct vmbus_channel_initiate_contact *)requestHeader; |
bd60c33e GKH |
690 | memcpy(&msgInfo->Response.VersionResponse, |
691 | versionResponse, | |
692 | sizeof(struct vmbus_channel_version_response)); | |
bfc30aae | 693 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
694 | } |
695 | } | |
dd0813b6 | 696 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
697 | |
698 | DPRINT_EXIT(VMBUS); | |
699 | } | |
700 | ||
c8212f04 GKH |
701 | /* Channel message dispatch table */ |
702 | static struct vmbus_channel_message_table_entry | |
703 | gChannelMessageTable[ChannelMessageCount] = { | |
704 | {ChannelMessageInvalid, NULL}, | |
705 | {ChannelMessageOfferChannel, VmbusChannelOnOffer}, | |
706 | {ChannelMessageRescindChannelOffer, VmbusChannelOnOfferRescind}, | |
707 | {ChannelMessageRequestOffers, NULL}, | |
708 | {ChannelMessageAllOffersDelivered, VmbusChannelOnOffersDelivered}, | |
709 | {ChannelMessageOpenChannel, NULL}, | |
710 | {ChannelMessageOpenChannelResult, VmbusChannelOnOpenResult}, | |
711 | {ChannelMessageCloseChannel, NULL}, | |
712 | {ChannelMessageGpadlHeader, NULL}, | |
713 | {ChannelMessageGpadlBody, NULL}, | |
714 | {ChannelMessageGpadlCreated, VmbusChannelOnGpadlCreated}, | |
715 | {ChannelMessageGpadlTeardown, NULL}, | |
716 | {ChannelMessageGpadlTorndown, VmbusChannelOnGpadlTorndown}, | |
717 | {ChannelMessageRelIdReleased, NULL}, | |
718 | {ChannelMessageInitiateContact, NULL}, | |
719 | {ChannelMessageVersionResponse, VmbusChannelOnVersionResponse}, | |
720 | {ChannelMessageUnload, NULL}, | |
721 | }; | |
722 | ||
3e189519 | 723 | /* |
bd60c33e GKH |
724 | * VmbusOnChannelMessage - Handler for channel protocol messages. |
725 | * | |
726 | * This is invoked in the vmbus worker thread context. | |
727 | */ | |
b239549c | 728 | void VmbusOnChannelMessage(void *Context) |
3e7ee490 | 729 | { |
eacb1b4d | 730 | struct hv_message *msg = Context; |
82250213 | 731 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
732 | int size; |
733 | ||
734 | DPRINT_ENTER(VMBUS); | |
735 | ||
82250213 | 736 | hdr = (struct vmbus_channel_message_header *)msg->u.Payload; |
bd60c33e | 737 | size = msg->Header.PayloadSize; |
3e7ee490 HJ |
738 | |
739 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->MessageType, size); | |
740 | ||
bd60c33e GKH |
741 | if (hdr->MessageType >= ChannelMessageCount) { |
742 | DPRINT_ERR(VMBUS, | |
743 | "Received invalid channel message type %d size %d", | |
744 | hdr->MessageType, size); | |
04f50c4d GKH |
745 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
746 | (unsigned char *)msg->u.Payload, size); | |
8c69f52a | 747 | kfree(msg); |
3e7ee490 HJ |
748 | return; |
749 | } | |
750 | ||
751 | if (gChannelMessageTable[hdr->MessageType].messageHandler) | |
3e7ee490 | 752 | gChannelMessageTable[hdr->MessageType].messageHandler(hdr); |
3e7ee490 | 753 | else |
bd60c33e GKH |
754 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", |
755 | hdr->MessageType); | |
3e7ee490 | 756 | |
454f18a9 | 757 | /* Free the msg that was allocated in VmbusOnMsgDPC() */ |
8c69f52a | 758 | kfree(msg); |
3e7ee490 HJ |
759 | DPRINT_EXIT(VMBUS); |
760 | } | |
761 | ||
3e189519 | 762 | /* |
bd60c33e GKH |
763 | * VmbusChannelRequestOffers - Send a request to get all our pending offers. |
764 | */ | |
b239549c | 765 | int VmbusChannelRequestOffers(void) |
3e7ee490 | 766 | { |
82250213 | 767 | struct vmbus_channel_message_header *msg; |
aded7165 | 768 | struct vmbus_channel_msginfo *msgInfo; |
bd60c33e | 769 | int ret; |
3e7ee490 HJ |
770 | |
771 | DPRINT_ENTER(VMBUS); | |
772 | ||
bd60c33e GKH |
773 | msgInfo = kmalloc(sizeof(*msgInfo) + |
774 | sizeof(struct vmbus_channel_message_header), | |
775 | GFP_KERNEL); | |
75910f23 BP |
776 | if (!msgInfo) |
777 | return -ENOMEM; | |
3e7ee490 | 778 | |
bfc30aae | 779 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
75910f23 BP |
780 | if (!msgInfo->WaitEvent) { |
781 | kfree(msgInfo); | |
782 | return -ENOMEM; | |
783 | } | |
784 | ||
82250213 | 785 | msg = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
786 | |
787 | msg->MessageType = ChannelMessageRequestOffers; | |
788 | ||
789 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
bd60c33e GKH |
790 | INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, |
791 | &msgInfo->msgListEntry); | |
3e7ee490 HJ |
792 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ |
793 | ||
bd60c33e GKH |
794 | ret = VmbusPostMessage(msg, |
795 | sizeof(struct vmbus_channel_message_header)); | |
796 | if (ret != 0) { | |
3e7ee490 HJ |
797 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); |
798 | ||
799 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
800 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
801 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
802 | ||
803 | goto Cleanup; | |
804 | } | |
bfc30aae | 805 | /* osd_WaitEventWait(msgInfo->waitEvent); */ |
3e7ee490 HJ |
806 | |
807 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
808 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
809 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
810 | ||
811 | ||
812 | Cleanup: | |
bd60c33e | 813 | if (msgInfo) { |
420beac4 | 814 | kfree(msgInfo->WaitEvent); |
8c69f52a | 815 | kfree(msgInfo); |
3e7ee490 HJ |
816 | } |
817 | ||
818 | DPRINT_EXIT(VMBUS); | |
3e7ee490 HJ |
819 | return ret; |
820 | } | |
821 | ||
3e189519 HJ |
822 | /* |
823 | * VmbusChannelReleaseUnattachedChannels - Release channels that are | |
824 | * unattached/unconnected ie (no drivers associated) | |
bd60c33e | 825 | */ |
b239549c | 826 | void VmbusChannelReleaseUnattachedChannels(void) |
3e7ee490 | 827 | { |
53af545b | 828 | struct vmbus_channel *channel, *pos; |
aded7165 | 829 | struct vmbus_channel *start = NULL; |
0f5e44ca | 830 | unsigned long flags; |
3e7ee490 | 831 | |
0f5e44ca | 832 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 833 | |
53af545b BP |
834 | list_for_each_entry_safe(channel, pos, &gVmbusConnection.ChannelList, |
835 | ListEntry) { | |
3e7ee490 HJ |
836 | if (channel == start) |
837 | break; | |
838 | ||
bd60c33e | 839 | if (!channel->DeviceObject->Driver) { |
53af545b | 840 | list_del(&channel->ListEntry); |
bd60c33e GKH |
841 | DPRINT_INFO(VMBUS, |
842 | "Releasing unattached device object %p", | |
843 | channel->DeviceObject); | |
3e7ee490 HJ |
844 | |
845 | VmbusChildDeviceRemove(channel->DeviceObject); | |
846 | FreeVmbusChannel(channel); | |
bd60c33e | 847 | } else { |
3e7ee490 | 848 | if (!start) |
3e7ee490 | 849 | start = channel; |
3e7ee490 HJ |
850 | } |
851 | } | |
852 | ||
0f5e44ca | 853 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
854 | } |
855 | ||
454f18a9 | 856 | /* eof */ |