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Commit | Line | Data |
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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> |
8b5d6d3b | 26 | #include <linux/completion.h> |
4983b39a | 27 | #include "osd.h" |
645954c5 | 28 | #include "logging.h" |
72daf320 | 29 | #include "vmbus_private.h" |
c88c4e4c | 30 | #include "utils.h" |
3e7ee490 | 31 | |
1d7e907f | 32 | struct vmbus_channel_message_table_entry { |
c8212f04 GKH |
33 | enum vmbus_channel_message_type messageType; |
34 | void (*messageHandler)(struct vmbus_channel_message_header *msg); | |
1d7e907f | 35 | }; |
3e7ee490 | 36 | |
9153f7b9 HJ |
37 | #define MAX_MSG_TYPES 3 |
38 | #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 7 | |
c88c4e4c | 39 | |
bd60c33e | 40 | static const struct hv_guid |
c88c4e4c | 41 | gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = { |
454f18a9 | 42 | /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ |
caf26a31 GKH |
43 | /* Storage - SCSI */ |
44 | { | |
45 | .data = { | |
46 | 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
47 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f | |
48 | } | |
49 | }, | |
50 | ||
454f18a9 | 51 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
caf26a31 GKH |
52 | /* Network */ |
53 | { | |
54 | .data = { | |
55 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
56 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
57 | } | |
58 | }, | |
59 | ||
454f18a9 | 60 | /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */ |
caf26a31 GKH |
61 | /* Input */ |
62 | { | |
63 | .data = { | |
64 | 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, | |
65 | 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A | |
66 | } | |
67 | }, | |
3e7ee490 | 68 | |
caf26a31 GKH |
69 | /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ |
70 | /* IDE */ | |
71 | { | |
72 | .data = { | |
73 | 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, | |
74 | 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 | |
75 | } | |
76 | }, | |
c88c4e4c HJ |
77 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ |
78 | /* Shutdown */ | |
79 | { | |
80 | .data = { | |
81 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
82 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
83 | } | |
84 | }, | |
39c4e9c3 HZ |
85 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ |
86 | /* TimeSync */ | |
87 | { | |
88 | .data = { | |
89 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
90 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
91 | } | |
92 | }, | |
9153f7b9 HJ |
93 | /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ |
94 | /* Heartbeat */ | |
95 | { | |
96 | .data = { | |
97 | 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, | |
98 | 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d | |
99 | } | |
100 | }, | |
3e7ee490 HJ |
101 | }; |
102 | ||
c88c4e4c HJ |
103 | |
104 | /** | |
105 | * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message | |
106 | * @icmsghdrp: Pointer to msg header structure | |
107 | * @icmsg_negotiate: Pointer to negotiate message structure | |
108 | * @buf: Raw buffer channel data | |
109 | * | |
110 | * @icmsghdrp is of type &struct icmsg_hdr. | |
111 | * @negop is of type &struct icmsg_negotiate. | |
112 | * Set up and fill in default negotiate response message. This response can | |
113 | * come from both the vmbus driver and the hv_utils driver. The current api | |
114 | * will respond properly to both Windows 2008 and Windows 2008-R2 operating | |
115 | * systems. | |
116 | * | |
117 | * Mainly used by Hyper-V drivers. | |
118 | */ | |
119 | void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, | |
120 | struct icmsg_negotiate *negop, | |
121 | u8 *buf) | |
122 | { | |
123 | if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { | |
124 | icmsghdrp->icmsgsize = 0x10; | |
125 | ||
126 | negop = (struct icmsg_negotiate *)&buf[ | |
127 | sizeof(struct vmbuspipe_hdr) + | |
128 | sizeof(struct icmsg_hdr)]; | |
129 | ||
130 | if (negop->icframe_vercnt == 2 && | |
131 | negop->icversion_data[1].major == 3) { | |
132 | negop->icversion_data[0].major = 3; | |
133 | negop->icversion_data[0].minor = 0; | |
134 | negop->icversion_data[1].major = 3; | |
135 | negop->icversion_data[1].minor = 0; | |
136 | } else { | |
137 | negop->icversion_data[0].major = 1; | |
138 | negop->icversion_data[0].minor = 0; | |
139 | negop->icversion_data[1].major = 1; | |
140 | negop->icversion_data[1].minor = 0; | |
141 | } | |
142 | ||
143 | negop->icframe_vercnt = 1; | |
144 | negop->icmsg_vercnt = 1; | |
145 | } | |
146 | } | |
147 | EXPORT_SYMBOL(prep_negotiate_resp); | |
148 | ||
149 | /** | |
150 | * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK | |
151 | * Hyper-V requests | |
152 | * @context: Pointer to argument structure. | |
153 | * | |
154 | * Set up the default handler for non device driver specific requests | |
155 | * from Hyper-V. This stub responds to the default negotiate messages | |
156 | * that come in for every non IDE/SCSI/Network request. | |
157 | * This behavior is normally overwritten in the hv_utils driver. That | |
158 | * driver handles requests like gracefull shutdown, heartbeats etc. | |
159 | * | |
160 | * Mainly used by Hyper-V drivers. | |
161 | */ | |
162 | void chn_cb_negotiate(void *context) | |
163 | { | |
164 | struct vmbus_channel *channel = context; | |
165 | u8 *buf; | |
166 | u32 buflen, recvlen; | |
167 | u64 requestid; | |
168 | ||
169 | struct icmsg_hdr *icmsghdrp; | |
170 | struct icmsg_negotiate *negop = NULL; | |
171 | ||
172 | buflen = PAGE_SIZE; | |
173 | buf = kmalloc(buflen, GFP_ATOMIC); | |
174 | ||
175 | VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid); | |
176 | ||
177 | if (recvlen > 0) { | |
178 | icmsghdrp = (struct icmsg_hdr *)&buf[ | |
179 | sizeof(struct vmbuspipe_hdr)]; | |
180 | ||
181 | prep_negotiate_resp(icmsghdrp, negop, buf); | |
182 | ||
183 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | |
184 | | ICMSGHDRFLAG_RESPONSE; | |
185 | ||
186 | VmbusChannelSendPacket(channel, buf, | |
187 | recvlen, requestid, | |
188 | VmbusPacketTypeDataInBand, 0); | |
189 | } | |
190 | ||
191 | kfree(buf); | |
192 | } | |
193 | EXPORT_SYMBOL(chn_cb_negotiate); | |
194 | ||
195 | /* | |
196 | * Function table used for message responses for non IDE/SCSI/Network type | |
197 | * messages. (Such as KVP/Shutdown etc) | |
198 | */ | |
199 | struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = { | |
200 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ | |
201 | /* Shutdown */ | |
202 | { | |
203 | .msg_type = HV_SHUTDOWN_MSG, | |
204 | .data = { | |
205 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
206 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
207 | }, | |
208 | .callback = chn_cb_negotiate, | |
209 | .log_msg = "Shutdown channel functionality initialized" | |
210 | }, | |
39c4e9c3 HZ |
211 | |
212 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ | |
213 | /* TimeSync */ | |
214 | { | |
215 | .msg_type = HV_TIMESYNC_MSG, | |
216 | .data = { | |
217 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
218 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
219 | }, | |
220 | .callback = chn_cb_negotiate, | |
221 | .log_msg = "Timesync channel functionality initialized" | |
222 | }, | |
9153f7b9 HJ |
223 | /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ |
224 | /* Heartbeat */ | |
225 | { | |
226 | .msg_type = HV_HEARTBEAT_MSG, | |
227 | .data = { | |
228 | 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, | |
229 | 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d | |
230 | }, | |
231 | .callback = chn_cb_negotiate, | |
232 | .log_msg = "Heartbeat channel functionality initialized" | |
233 | }, | |
c88c4e4c HJ |
234 | }; |
235 | EXPORT_SYMBOL(hv_cb_utils); | |
236 | ||
3e189519 | 237 | /* |
bd60c33e GKH |
238 | * AllocVmbusChannel - Allocate and initialize a vmbus channel object |
239 | */ | |
aded7165 | 240 | struct vmbus_channel *AllocVmbusChannel(void) |
3e7ee490 | 241 | { |
aded7165 | 242 | struct vmbus_channel *channel; |
3e7ee490 | 243 | |
aded7165 | 244 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
3e7ee490 | 245 | if (!channel) |
3e7ee490 | 246 | return NULL; |
3e7ee490 | 247 | |
54411c42 | 248 | spin_lock_init(&channel->inbound_lock); |
3e7ee490 | 249 | |
c8a429a4 GKH |
250 | init_timer(&channel->poll_timer); |
251 | channel->poll_timer.data = (unsigned long)channel; | |
252 | channel->poll_timer.function = VmbusChannelOnTimer; | |
3e7ee490 | 253 | |
de65a384 | 254 | channel->ControlWQ = create_workqueue("hv_vmbus_ctl"); |
bd60c33e | 255 | if (!channel->ControlWQ) { |
8c69f52a | 256 | kfree(channel); |
3e7ee490 HJ |
257 | return NULL; |
258 | } | |
259 | ||
260 | return channel; | |
261 | } | |
262 | ||
3e189519 | 263 | /* |
bd60c33e GKH |
264 | * ReleaseVmbusChannel - Release the vmbus channel object itself |
265 | */ | |
266 | static inline void ReleaseVmbusChannel(void *context) | |
3e7ee490 | 267 | { |
bd60c33e | 268 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
269 | |
270 | DPRINT_ENTER(VMBUS); | |
271 | ||
272 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); | |
de65a384 | 273 | destroy_workqueue(channel->ControlWQ); |
3e7ee490 HJ |
274 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
275 | ||
8c69f52a | 276 | kfree(channel); |
3e7ee490 HJ |
277 | |
278 | DPRINT_EXIT(VMBUS); | |
279 | } | |
280 | ||
3e189519 | 281 | /* |
bd60c33e GKH |
282 | * FreeVmbusChannel - Release the resources used by the vmbus channel object |
283 | */ | |
aded7165 | 284 | void FreeVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 | 285 | { |
5996b3dd | 286 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 287 | |
bd60c33e GKH |
288 | /* |
289 | * We have to release the channel's workqueue/thread in the vmbus's | |
290 | * workqueue/thread context | |
291 | * ie we can't destroy ourselves. | |
292 | */ | |
de65a384 | 293 | osd_schedule_callback(gVmbusConnection.WorkQueue, ReleaseVmbusChannel, |
bd60c33e | 294 | Channel); |
3e7ee490 HJ |
295 | } |
296 | ||
8b5d6d3b HZ |
297 | |
298 | DECLARE_COMPLETION(hv_channel_ready); | |
299 | ||
300 | /* | |
301 | * Count initialized channels, and ensure all channels are ready when hv_vmbus | |
302 | * module loading completes. | |
303 | */ | |
304 | static void count_hv_channel(void) | |
305 | { | |
306 | static int counter; | |
307 | unsigned long flags; | |
308 | ||
309 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); | |
310 | if (++counter == MAX_MSG_TYPES) | |
311 | complete(&hv_channel_ready); | |
312 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); | |
313 | } | |
314 | ||
315 | ||
3e189519 | 316 | /* |
c88c4e4c HJ |
317 | * VmbusChannelProcessOffer - Process the offer by creating a channel/device |
318 | * associated with this offer | |
bd60c33e GKH |
319 | */ |
320 | static void VmbusChannelProcessOffer(void *context) | |
3e7ee490 | 321 | { |
aded7165 GKH |
322 | struct vmbus_channel *newChannel = context; |
323 | struct vmbus_channel *channel; | |
0e727613 | 324 | bool fNew = true; |
bd60c33e | 325 | int ret; |
c88c4e4c | 326 | int cnt; |
0f5e44ca | 327 | unsigned long flags; |
3e7ee490 HJ |
328 | |
329 | DPRINT_ENTER(VMBUS); | |
330 | ||
454f18a9 | 331 | /* Make sure this is a new offer */ |
0f5e44ca | 332 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 333 | |
53af545b | 334 | list_for_each_entry(channel, &gVmbusConnection.ChannelList, ListEntry) { |
bd60c33e GKH |
335 | if (!memcmp(&channel->OfferMsg.Offer.InterfaceType, |
336 | &newChannel->OfferMsg.Offer.InterfaceType, | |
337 | sizeof(struct hv_guid)) && | |
338 | !memcmp(&channel->OfferMsg.Offer.InterfaceInstance, | |
339 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
340 | sizeof(struct hv_guid))) { | |
0e727613 | 341 | fNew = false; |
3e7ee490 HJ |
342 | break; |
343 | } | |
344 | } | |
345 | ||
346 | if (fNew) | |
53af545b BP |
347 | list_add_tail(&newChannel->ListEntry, |
348 | &gVmbusConnection.ChannelList); | |
bd60c33e | 349 | |
0f5e44ca | 350 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 351 | |
bd60c33e GKH |
352 | if (!fNew) { |
353 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", | |
354 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 HJ |
355 | FreeVmbusChannel(newChannel); |
356 | DPRINT_EXIT(VMBUS); | |
357 | return; | |
358 | } | |
359 | ||
bd60c33e GKH |
360 | /* |
361 | * Start the process of binding this offer to the driver | |
362 | * We need to set the DeviceObject field before calling | |
363 | * VmbusChildDeviceAdd() | |
364 | */ | |
3e7ee490 | 365 | newChannel->DeviceObject = VmbusChildDeviceCreate( |
daaa8cc3 GKH |
366 | &newChannel->OfferMsg.Offer.InterfaceType, |
367 | &newChannel->OfferMsg.Offer.InterfaceInstance, | |
3e7ee490 HJ |
368 | newChannel); |
369 | ||
bd60c33e GKH |
370 | DPRINT_DBG(VMBUS, "child device object allocated - %p", |
371 | newChannel->DeviceObject); | |
3e7ee490 | 372 | |
454f18a9 BP |
373 | /* |
374 | * Add the new device to the bus. This will kick off device-driver | |
375 | * binding which eventually invokes the device driver's AddDevice() | |
376 | * method. | |
377 | */ | |
3e7ee490 | 378 | ret = VmbusChildDeviceAdd(newChannel->DeviceObject); |
bd60c33e GKH |
379 | if (ret != 0) { |
380 | DPRINT_ERR(VMBUS, | |
381 | "unable to add child device object (relid %d)", | |
382 | newChannel->OfferMsg.ChildRelId); | |
3e7ee490 | 383 | |
0f5e44ca | 384 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 385 | list_del(&newChannel->ListEntry); |
0f5e44ca | 386 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
387 | |
388 | FreeVmbusChannel(newChannel); | |
bd60c33e | 389 | } else { |
454f18a9 BP |
390 | /* |
391 | * This state is used to indicate a successful open | |
392 | * so that when we do close the channel normally, we | |
393 | * can cleanup properly | |
394 | */ | |
3e7ee490 | 395 | newChannel->State = CHANNEL_OPEN_STATE; |
c88c4e4c | 396 | |
8b5d6d3b HZ |
397 | /* Open IC channels */ |
398 | for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) { | |
c88c4e4c HJ |
399 | if (memcmp(&newChannel->OfferMsg.Offer.InterfaceType, |
400 | &hv_cb_utils[cnt].data, | |
8b5d6d3b HZ |
401 | sizeof(struct hv_guid)) == 0 && |
402 | VmbusChannelOpen(newChannel, 2 * PAGE_SIZE, | |
403 | 2 * PAGE_SIZE, NULL, 0, | |
404 | hv_cb_utils[cnt].callback, | |
405 | newChannel) == 0) { | |
406 | hv_cb_utils[cnt].channel = newChannel; | |
c88c4e4c | 407 | DPRINT_INFO(VMBUS, "%s", |
8b5d6d3b HZ |
408 | hv_cb_utils[cnt].log_msg); |
409 | count_hv_channel(); | |
c88c4e4c | 410 | } |
c88c4e4c | 411 | } |
3e7ee490 HJ |
412 | } |
413 | DPRINT_EXIT(VMBUS); | |
414 | } | |
415 | ||
3e189519 | 416 | /* |
bd60c33e GKH |
417 | * VmbusChannelProcessRescindOffer - Rescind the offer by initiating a device removal |
418 | */ | |
419 | static void VmbusChannelProcessRescindOffer(void *context) | |
3e7ee490 | 420 | { |
aded7165 | 421 | struct vmbus_channel *channel = context; |
3e7ee490 HJ |
422 | |
423 | DPRINT_ENTER(VMBUS); | |
3e7ee490 | 424 | VmbusChildDeviceRemove(channel->DeviceObject); |
3e7ee490 HJ |
425 | DPRINT_EXIT(VMBUS); |
426 | } | |
427 | ||
3e189519 | 428 | /* |
bd60c33e GKH |
429 | * VmbusChannelOnOffer - Handler for channel offers from vmbus in parent partition. |
430 | * | |
431 | * We ignore all offers except network and storage offers. For each network and | |
432 | * storage offers, we create a channel object and queue a work item to the | |
433 | * channel object to process the offer synchronously | |
434 | */ | |
82250213 | 435 | static void VmbusChannelOnOffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 436 | { |
bd60c33e | 437 | struct vmbus_channel_offer_channel *offer; |
aded7165 | 438 | struct vmbus_channel *newChannel; |
caf26a31 GKH |
439 | struct hv_guid *guidType; |
440 | struct hv_guid *guidInstance; | |
3e7ee490 | 441 | int i; |
bd60c33e | 442 | int fSupported = 0; |
3e7ee490 HJ |
443 | |
444 | DPRINT_ENTER(VMBUS); | |
445 | ||
bd60c33e GKH |
446 | offer = (struct vmbus_channel_offer_channel *)hdr; |
447 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
448 | if (memcmp(&offer->Offer.InterfaceType, | |
449 | &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { | |
3e7ee490 HJ |
450 | fSupported = 1; |
451 | break; | |
452 | } | |
453 | } | |
454 | ||
bd60c33e GKH |
455 | if (!fSupported) { |
456 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " | |
457 | "child relid %d", offer->ChildRelId); | |
3e7ee490 | 458 | DPRINT_EXIT(VMBUS); |
3e7ee490 HJ |
459 | return; |
460 | } | |
461 | ||
462 | guidType = &offer->Offer.InterfaceType; | |
463 | guidInstance = &offer->Offer.InterfaceInstance; | |
464 | ||
bd60c33e GKH |
465 | DPRINT_INFO(VMBUS, "Channel offer notification - " |
466 | "child relid %d monitor id %d allocated %d, " | |
467 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
468 | "%02x%02x%02x%02x%02x%02x%02x%02x} " | |
469 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
470 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
471 | offer->ChildRelId, offer->MonitorId, | |
472 | offer->MonitorAllocated, | |
473 | guidType->data[3], guidType->data[2], | |
474 | guidType->data[1], guidType->data[0], | |
475 | guidType->data[5], guidType->data[4], | |
476 | guidType->data[7], guidType->data[6], | |
477 | guidType->data[8], guidType->data[9], | |
478 | guidType->data[10], guidType->data[11], | |
479 | guidType->data[12], guidType->data[13], | |
480 | guidType->data[14], guidType->data[15], | |
481 | guidInstance->data[3], guidInstance->data[2], | |
482 | guidInstance->data[1], guidInstance->data[0], | |
483 | guidInstance->data[5], guidInstance->data[4], | |
484 | guidInstance->data[7], guidInstance->data[6], | |
485 | guidInstance->data[8], guidInstance->data[9], | |
486 | guidInstance->data[10], guidInstance->data[11], | |
487 | guidInstance->data[12], guidInstance->data[13], | |
488 | guidInstance->data[14], guidInstance->data[15]); | |
3e7ee490 | 489 | |
454f18a9 | 490 | /* Allocate the channel object and save this offer. */ |
3e7ee490 | 491 | newChannel = AllocVmbusChannel(); |
bd60c33e | 492 | if (!newChannel) { |
3e7ee490 HJ |
493 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); |
494 | return; | |
495 | } | |
496 | ||
497 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newChannel); | |
498 | ||
bd60c33e GKH |
499 | memcpy(&newChannel->OfferMsg, offer, |
500 | sizeof(struct vmbus_channel_offer_channel)); | |
5654e932 GKH |
501 | newChannel->MonitorGroup = (u8)offer->MonitorId / 32; |
502 | newChannel->MonitorBit = (u8)offer->MonitorId % 32; | |
3e7ee490 | 503 | |
454f18a9 | 504 | /* TODO: Make sure the offer comes from our parent partition */ |
de65a384 BP |
505 | osd_schedule_callback(newChannel->ControlWQ, VmbusChannelProcessOffer, |
506 | newChannel); | |
3e7ee490 HJ |
507 | |
508 | DPRINT_EXIT(VMBUS); | |
509 | } | |
510 | ||
3e189519 | 511 | /* |
bd60c33e GKH |
512 | * VmbusChannelOnOfferRescind - Rescind offer handler. |
513 | * | |
514 | * We queue a work item to process this offer synchronously | |
515 | */ | |
82250213 | 516 | static void VmbusChannelOnOfferRescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 517 | { |
bd60c33e | 518 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 519 | struct vmbus_channel *channel; |
3e7ee490 HJ |
520 | |
521 | DPRINT_ENTER(VMBUS); | |
522 | ||
bd60c33e | 523 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
3e7ee490 | 524 | channel = GetChannelFromRelId(rescind->ChildRelId); |
bd60c33e GKH |
525 | if (channel == NULL) { |
526 | DPRINT_DBG(VMBUS, "channel not found for relId %d", | |
527 | rescind->ChildRelId); | |
3e7ee490 HJ |
528 | return; |
529 | } | |
530 | ||
de65a384 BP |
531 | osd_schedule_callback(channel->ControlWQ, |
532 | VmbusChannelProcessRescindOffer, | |
533 | channel); | |
3e7ee490 HJ |
534 | |
535 | DPRINT_EXIT(VMBUS); | |
536 | } | |
537 | ||
3e189519 | 538 | /* |
bd60c33e GKH |
539 | * VmbusChannelOnOffersDelivered - This is invoked when all offers have been delivered. |
540 | * | |
541 | * Nothing to do here. | |
542 | */ | |
543 | static void VmbusChannelOnOffersDelivered( | |
544 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 HJ |
545 | { |
546 | DPRINT_ENTER(VMBUS); | |
547 | DPRINT_EXIT(VMBUS); | |
548 | } | |
549 | ||
3e189519 | 550 | /* |
bd60c33e GKH |
551 | * VmbusChannelOnOpenResult - Open result handler. |
552 | * | |
553 | * This is invoked when we received a response to our channel open request. | |
554 | * Find the matching request, copy the response and signal the requesting | |
555 | * thread. | |
556 | */ | |
82250213 | 557 | static void VmbusChannelOnOpenResult(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 558 | { |
bd60c33e | 559 | struct vmbus_channel_open_result *result; |
53af545b | 560 | struct list_head *curr; |
aded7165 | 561 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
562 | struct vmbus_channel_message_header *requestHeader; |
563 | struct vmbus_channel_open_channel *openMsg; | |
dd0813b6 | 564 | unsigned long flags; |
3e7ee490 HJ |
565 | |
566 | DPRINT_ENTER(VMBUS); | |
567 | ||
bd60c33e | 568 | result = (struct vmbus_channel_open_result *)hdr; |
3e7ee490 HJ |
569 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->Status); |
570 | ||
bd60c33e GKH |
571 | /* |
572 | * Find the open msg, copy the result and signal/unblock the wait event | |
573 | */ | |
dd0813b6 | 574 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 575 | |
53af545b BP |
576 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
577 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 578 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 579 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 580 | |
bd60c33e | 581 | if (requestHeader->MessageType == ChannelMessageOpenChannel) { |
82250213 | 582 | openMsg = (struct vmbus_channel_open_channel *)msgInfo->Msg; |
3e7ee490 | 583 | if (openMsg->ChildRelId == result->ChildRelId && |
bd60c33e GKH |
584 | openMsg->OpenId == result->OpenId) { |
585 | memcpy(&msgInfo->Response.OpenResult, | |
586 | result, | |
587 | sizeof(struct vmbus_channel_open_result)); | |
bfc30aae | 588 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
589 | break; |
590 | } | |
591 | } | |
592 | } | |
dd0813b6 | 593 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
594 | |
595 | DPRINT_EXIT(VMBUS); | |
596 | } | |
597 | ||
3e189519 | 598 | /* |
bd60c33e GKH |
599 | * VmbusChannelOnGpadlCreated - GPADL created handler. |
600 | * | |
601 | * This is invoked when we received a response to our gpadl create request. | |
602 | * Find the matching request, copy the response and signal the requesting | |
603 | * thread. | |
604 | */ | |
82250213 | 605 | static void VmbusChannelOnGpadlCreated(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 606 | { |
bd60c33e | 607 | struct vmbus_channel_gpadl_created *gpadlCreated; |
53af545b | 608 | struct list_head *curr; |
aded7165 | 609 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
610 | struct vmbus_channel_message_header *requestHeader; |
611 | struct vmbus_channel_gpadl_header *gpadlHeader; | |
dd0813b6 | 612 | unsigned long flags; |
3e7ee490 HJ |
613 | |
614 | DPRINT_ENTER(VMBUS); | |
615 | ||
bd60c33e GKH |
616 | gpadlCreated = (struct vmbus_channel_gpadl_created *)hdr; |
617 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", | |
618 | gpadlCreated->CreationStatus); | |
3e7ee490 | 619 | |
bd60c33e GKH |
620 | /* |
621 | * Find the establish msg, copy the result and signal/unblock the wait | |
622 | * event | |
623 | */ | |
dd0813b6 | 624 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 625 | |
53af545b BP |
626 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
627 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 628 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 629 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 630 | |
bd60c33e | 631 | if (requestHeader->MessageType == ChannelMessageGpadlHeader) { |
82250213 | 632 | gpadlHeader = (struct vmbus_channel_gpadl_header *)requestHeader; |
3e7ee490 | 633 | |
bd60c33e GKH |
634 | if ((gpadlCreated->ChildRelId == |
635 | gpadlHeader->ChildRelId) && | |
636 | (gpadlCreated->Gpadl == gpadlHeader->Gpadl)) { | |
637 | memcpy(&msgInfo->Response.GpadlCreated, | |
638 | gpadlCreated, | |
639 | sizeof(struct vmbus_channel_gpadl_created)); | |
bfc30aae | 640 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
641 | break; |
642 | } | |
643 | } | |
644 | } | |
dd0813b6 | 645 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
646 | |
647 | DPRINT_EXIT(VMBUS); | |
648 | } | |
649 | ||
3e189519 | 650 | /* |
bd60c33e GKH |
651 | * VmbusChannelOnGpadlTorndown - GPADL torndown handler. |
652 | * | |
653 | * This is invoked when we received a response to our gpadl teardown request. | |
654 | * Find the matching request, copy the response and signal the requesting | |
655 | * thread. | |
656 | */ | |
657 | static void VmbusChannelOnGpadlTorndown( | |
658 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 659 | { |
bd60c33e | 660 | struct vmbus_channel_gpadl_torndown *gpadlTorndown; |
53af545b | 661 | struct list_head *curr; |
aded7165 | 662 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
663 | struct vmbus_channel_message_header *requestHeader; |
664 | struct vmbus_channel_gpadl_teardown *gpadlTeardown; | |
dd0813b6 | 665 | unsigned long flags; |
3e7ee490 HJ |
666 | |
667 | DPRINT_ENTER(VMBUS); | |
668 | ||
bd60c33e GKH |
669 | gpadlTorndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
670 | ||
671 | /* | |
672 | * Find the open msg, copy the result and signal/unblock the wait event | |
673 | */ | |
dd0813b6 | 674 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 675 | |
53af545b BP |
676 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
677 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 678 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 679 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 680 | |
bd60c33e | 681 | if (requestHeader->MessageType == ChannelMessageGpadlTeardown) { |
82250213 | 682 | gpadlTeardown = (struct vmbus_channel_gpadl_teardown *)requestHeader; |
3e7ee490 | 683 | |
bd60c33e GKH |
684 | if (gpadlTorndown->Gpadl == gpadlTeardown->Gpadl) { |
685 | memcpy(&msgInfo->Response.GpadlTorndown, | |
686 | gpadlTorndown, | |
687 | sizeof(struct vmbus_channel_gpadl_torndown)); | |
bfc30aae | 688 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
689 | break; |
690 | } | |
691 | } | |
692 | } | |
dd0813b6 | 693 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
694 | |
695 | DPRINT_EXIT(VMBUS); | |
696 | } | |
697 | ||
3e189519 | 698 | /* |
bd60c33e GKH |
699 | * VmbusChannelOnVersionResponse - Version response handler |
700 | * | |
701 | * This is invoked when we received a response to our initiate contact request. | |
702 | * Find the matching request, copy the response and signal the requesting | |
703 | * thread. | |
704 | */ | |
705 | static void VmbusChannelOnVersionResponse( | |
706 | struct vmbus_channel_message_header *hdr) | |
3e7ee490 | 707 | { |
53af545b | 708 | struct list_head *curr; |
aded7165 | 709 | struct vmbus_channel_msginfo *msgInfo; |
82250213 GKH |
710 | struct vmbus_channel_message_header *requestHeader; |
711 | struct vmbus_channel_initiate_contact *initiate; | |
bd60c33e | 712 | struct vmbus_channel_version_response *versionResponse; |
dd0813b6 | 713 | unsigned long flags; |
3e7ee490 HJ |
714 | |
715 | DPRINT_ENTER(VMBUS); | |
716 | ||
bd60c33e | 717 | versionResponse = (struct vmbus_channel_version_response *)hdr; |
dd0813b6 | 718 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 719 | |
53af545b BP |
720 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
721 | /* FIXME: this should probably use list_entry() instead */ | |
aded7165 | 722 | msgInfo = (struct vmbus_channel_msginfo *)curr; |
82250213 | 723 | requestHeader = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 | 724 | |
bd60c33e GKH |
725 | if (requestHeader->MessageType == |
726 | ChannelMessageInitiateContact) { | |
82250213 | 727 | initiate = (struct vmbus_channel_initiate_contact *)requestHeader; |
bd60c33e GKH |
728 | memcpy(&msgInfo->Response.VersionResponse, |
729 | versionResponse, | |
730 | sizeof(struct vmbus_channel_version_response)); | |
bfc30aae | 731 | osd_WaitEventSet(msgInfo->WaitEvent); |
3e7ee490 HJ |
732 | } |
733 | } | |
dd0813b6 | 734 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
735 | |
736 | DPRINT_EXIT(VMBUS); | |
737 | } | |
738 | ||
c8212f04 GKH |
739 | /* Channel message dispatch table */ |
740 | static struct vmbus_channel_message_table_entry | |
741 | gChannelMessageTable[ChannelMessageCount] = { | |
742 | {ChannelMessageInvalid, NULL}, | |
743 | {ChannelMessageOfferChannel, VmbusChannelOnOffer}, | |
744 | {ChannelMessageRescindChannelOffer, VmbusChannelOnOfferRescind}, | |
745 | {ChannelMessageRequestOffers, NULL}, | |
746 | {ChannelMessageAllOffersDelivered, VmbusChannelOnOffersDelivered}, | |
747 | {ChannelMessageOpenChannel, NULL}, | |
748 | {ChannelMessageOpenChannelResult, VmbusChannelOnOpenResult}, | |
749 | {ChannelMessageCloseChannel, NULL}, | |
750 | {ChannelMessageGpadlHeader, NULL}, | |
751 | {ChannelMessageGpadlBody, NULL}, | |
752 | {ChannelMessageGpadlCreated, VmbusChannelOnGpadlCreated}, | |
753 | {ChannelMessageGpadlTeardown, NULL}, | |
754 | {ChannelMessageGpadlTorndown, VmbusChannelOnGpadlTorndown}, | |
755 | {ChannelMessageRelIdReleased, NULL}, | |
756 | {ChannelMessageInitiateContact, NULL}, | |
757 | {ChannelMessageVersionResponse, VmbusChannelOnVersionResponse}, | |
758 | {ChannelMessageUnload, NULL}, | |
759 | }; | |
760 | ||
3e189519 | 761 | /* |
bd60c33e GKH |
762 | * VmbusOnChannelMessage - Handler for channel protocol messages. |
763 | * | |
764 | * This is invoked in the vmbus worker thread context. | |
765 | */ | |
b239549c | 766 | void VmbusOnChannelMessage(void *Context) |
3e7ee490 | 767 | { |
eacb1b4d | 768 | struct hv_message *msg = Context; |
82250213 | 769 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
770 | int size; |
771 | ||
772 | DPRINT_ENTER(VMBUS); | |
773 | ||
82250213 | 774 | hdr = (struct vmbus_channel_message_header *)msg->u.Payload; |
bd60c33e | 775 | size = msg->Header.PayloadSize; |
3e7ee490 HJ |
776 | |
777 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->MessageType, size); | |
778 | ||
bd60c33e GKH |
779 | if (hdr->MessageType >= ChannelMessageCount) { |
780 | DPRINT_ERR(VMBUS, | |
781 | "Received invalid channel message type %d size %d", | |
782 | hdr->MessageType, size); | |
04f50c4d GKH |
783 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
784 | (unsigned char *)msg->u.Payload, size); | |
8c69f52a | 785 | kfree(msg); |
3e7ee490 HJ |
786 | return; |
787 | } | |
788 | ||
789 | if (gChannelMessageTable[hdr->MessageType].messageHandler) | |
3e7ee490 | 790 | gChannelMessageTable[hdr->MessageType].messageHandler(hdr); |
3e7ee490 | 791 | else |
bd60c33e GKH |
792 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", |
793 | hdr->MessageType); | |
3e7ee490 | 794 | |
454f18a9 | 795 | /* Free the msg that was allocated in VmbusOnMsgDPC() */ |
8c69f52a | 796 | kfree(msg); |
3e7ee490 HJ |
797 | DPRINT_EXIT(VMBUS); |
798 | } | |
799 | ||
3e189519 | 800 | /* |
bd60c33e GKH |
801 | * VmbusChannelRequestOffers - Send a request to get all our pending offers. |
802 | */ | |
b239549c | 803 | int VmbusChannelRequestOffers(void) |
3e7ee490 | 804 | { |
82250213 | 805 | struct vmbus_channel_message_header *msg; |
aded7165 | 806 | struct vmbus_channel_msginfo *msgInfo; |
bd60c33e | 807 | int ret; |
3e7ee490 HJ |
808 | |
809 | DPRINT_ENTER(VMBUS); | |
810 | ||
bd60c33e GKH |
811 | msgInfo = kmalloc(sizeof(*msgInfo) + |
812 | sizeof(struct vmbus_channel_message_header), | |
813 | GFP_KERNEL); | |
75910f23 BP |
814 | if (!msgInfo) |
815 | return -ENOMEM; | |
3e7ee490 | 816 | |
bfc30aae | 817 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
75910f23 BP |
818 | if (!msgInfo->WaitEvent) { |
819 | kfree(msgInfo); | |
820 | return -ENOMEM; | |
821 | } | |
822 | ||
82250213 | 823 | msg = (struct vmbus_channel_message_header *)msgInfo->Msg; |
3e7ee490 HJ |
824 | |
825 | msg->MessageType = ChannelMessageRequestOffers; | |
826 | ||
827 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
bd60c33e GKH |
828 | INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, |
829 | &msgInfo->msgListEntry); | |
3e7ee490 HJ |
830 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ |
831 | ||
bd60c33e GKH |
832 | ret = VmbusPostMessage(msg, |
833 | sizeof(struct vmbus_channel_message_header)); | |
834 | if (ret != 0) { | |
3e7ee490 HJ |
835 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); |
836 | ||
837 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
838 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
839 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
840 | ||
841 | goto Cleanup; | |
842 | } | |
bfc30aae | 843 | /* osd_WaitEventWait(msgInfo->waitEvent); */ |
3e7ee490 HJ |
844 | |
845 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
846 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
847 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
848 | ||
849 | ||
850 | Cleanup: | |
bd60c33e | 851 | if (msgInfo) { |
420beac4 | 852 | kfree(msgInfo->WaitEvent); |
8c69f52a | 853 | kfree(msgInfo); |
3e7ee490 HJ |
854 | } |
855 | ||
856 | DPRINT_EXIT(VMBUS); | |
3e7ee490 HJ |
857 | return ret; |
858 | } | |
859 | ||
3e189519 HJ |
860 | /* |
861 | * VmbusChannelReleaseUnattachedChannels - Release channels that are | |
862 | * unattached/unconnected ie (no drivers associated) | |
bd60c33e | 863 | */ |
b239549c | 864 | void VmbusChannelReleaseUnattachedChannels(void) |
3e7ee490 | 865 | { |
53af545b | 866 | struct vmbus_channel *channel, *pos; |
aded7165 | 867 | struct vmbus_channel *start = NULL; |
0f5e44ca | 868 | unsigned long flags; |
3e7ee490 | 869 | |
0f5e44ca | 870 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 871 | |
53af545b BP |
872 | list_for_each_entry_safe(channel, pos, &gVmbusConnection.ChannelList, |
873 | ListEntry) { | |
3e7ee490 HJ |
874 | if (channel == start) |
875 | break; | |
876 | ||
bd60c33e | 877 | if (!channel->DeviceObject->Driver) { |
53af545b | 878 | list_del(&channel->ListEntry); |
bd60c33e GKH |
879 | DPRINT_INFO(VMBUS, |
880 | "Releasing unattached device object %p", | |
881 | channel->DeviceObject); | |
3e7ee490 HJ |
882 | |
883 | VmbusChildDeviceRemove(channel->DeviceObject); | |
884 | FreeVmbusChannel(channel); | |
bd60c33e | 885 | } else { |
3e7ee490 | 886 | if (!start) |
3e7ee490 | 887 | start = channel; |
3e7ee490 HJ |
888 | } |
889 | } | |
890 | ||
0f5e44ca | 891 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
892 | } |
893 | ||
454f18a9 | 894 | /* eof */ |