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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 | ||
fff41b2e | 175 | vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); |
c88c4e4c HJ |
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 | ||
fff41b2e | 186 | vmbus_sendpacket(channel, buf, |
c88c4e4c HJ |
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 | /* |
e98cb276 | 238 | * alloc_channel - Allocate and initialize a vmbus channel object |
bd60c33e | 239 | */ |
50fe56d2 | 240 | static struct vmbus_channel *alloc_channel(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; | |
fff41b2e | 252 | channel->poll_timer.function = vmbus_ontimer; |
3e7ee490 | 253 | |
c50f7fb2 HZ |
254 | channel->controlwq = create_workqueue("hv_vmbus_ctl"); |
255 | if (!channel->controlwq) { | |
8c69f52a | 256 | kfree(channel); |
3e7ee490 HJ |
257 | return NULL; |
258 | } | |
259 | ||
260 | return channel; | |
261 | } | |
262 | ||
3e189519 | 263 | /* |
e98cb276 | 264 | * release_hannel - Release the vmbus channel object itself |
bd60c33e | 265 | */ |
4b2f9abe | 266 | static void release_channel(struct work_struct *work) |
3e7ee490 | 267 | { |
4b2f9abe TT |
268 | struct vmbus_channel *channel = container_of(work, |
269 | struct vmbus_channel, | |
270 | work); | |
3e7ee490 | 271 | |
3e7ee490 | 272 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); |
c50f7fb2 | 273 | destroy_workqueue(channel->controlwq); |
3e7ee490 HJ |
274 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
275 | ||
8c69f52a | 276 | kfree(channel); |
3e7ee490 HJ |
277 | } |
278 | ||
3e189519 | 279 | /* |
e98cb276 | 280 | * free_channel - Release the resources used by the vmbus channel object |
bd60c33e | 281 | */ |
e98cb276 | 282 | void free_channel(struct vmbus_channel *channel) |
3e7ee490 | 283 | { |
188963ec | 284 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 285 | |
bd60c33e GKH |
286 | /* |
287 | * We have to release the channel's workqueue/thread in the vmbus's | |
288 | * workqueue/thread context | |
289 | * ie we can't destroy ourselves. | |
290 | */ | |
4b2f9abe TT |
291 | INIT_WORK(&channel->work, release_channel); |
292 | queue_work(gVmbusConnection.WorkQueue, &channel->work); | |
3e7ee490 HJ |
293 | } |
294 | ||
8b5d6d3b HZ |
295 | |
296 | DECLARE_COMPLETION(hv_channel_ready); | |
297 | ||
298 | /* | |
299 | * Count initialized channels, and ensure all channels are ready when hv_vmbus | |
300 | * module loading completes. | |
301 | */ | |
302 | static void count_hv_channel(void) | |
303 | { | |
304 | static int counter; | |
305 | unsigned long flags; | |
306 | ||
307 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); | |
308 | if (++counter == MAX_MSG_TYPES) | |
309 | complete(&hv_channel_ready); | |
310 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); | |
311 | } | |
312 | ||
4b2f9abe TT |
313 | /* |
314 | * vmbus_process_rescind_offer - | |
315 | * Rescind the offer by initiating a device removal | |
316 | */ | |
317 | static void vmbus_process_rescind_offer(struct work_struct *work) | |
318 | { | |
319 | struct vmbus_channel *channel = container_of(work, | |
320 | struct vmbus_channel, | |
321 | work); | |
322 | ||
323 | vmbus_child_device_unregister(channel->device_obj); | |
324 | } | |
8b5d6d3b | 325 | |
3e189519 | 326 | /* |
e98cb276 | 327 | * vmbus_process_offer - Process the offer by creating a channel/device |
c88c4e4c | 328 | * associated with this offer |
bd60c33e | 329 | */ |
4b2f9abe | 330 | static void vmbus_process_offer(struct work_struct *work) |
3e7ee490 | 331 | { |
4b2f9abe TT |
332 | struct vmbus_channel *newchannel = container_of(work, |
333 | struct vmbus_channel, | |
334 | work); | |
aded7165 | 335 | struct vmbus_channel *channel; |
188963ec | 336 | bool fnew = true; |
bd60c33e | 337 | int ret; |
c88c4e4c | 338 | int cnt; |
0f5e44ca | 339 | unsigned long flags; |
3e7ee490 | 340 | |
4b2f9abe TT |
341 | /* The next possible work is rescind handling */ |
342 | INIT_WORK(&newchannel->work, vmbus_process_rescind_offer); | |
343 | ||
454f18a9 | 344 | /* Make sure this is a new offer */ |
0f5e44ca | 345 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 346 | |
c50f7fb2 HZ |
347 | list_for_each_entry(channel, &gVmbusConnection.ChannelList, listentry) { |
348 | if (!memcmp(&channel->offermsg.offer.InterfaceType, | |
349 | &newchannel->offermsg.offer.InterfaceType, | |
bd60c33e | 350 | sizeof(struct hv_guid)) && |
c50f7fb2 HZ |
351 | !memcmp(&channel->offermsg.offer.InterfaceInstance, |
352 | &newchannel->offermsg.offer.InterfaceInstance, | |
bd60c33e | 353 | sizeof(struct hv_guid))) { |
188963ec | 354 | fnew = false; |
3e7ee490 HJ |
355 | break; |
356 | } | |
357 | } | |
358 | ||
188963ec | 359 | if (fnew) |
c50f7fb2 | 360 | list_add_tail(&newchannel->listentry, |
53af545b | 361 | &gVmbusConnection.ChannelList); |
bd60c33e | 362 | |
0f5e44ca | 363 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 364 | |
188963ec | 365 | if (!fnew) { |
bd60c33e | 366 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", |
c50f7fb2 | 367 | newchannel->offermsg.child_relid); |
e98cb276 | 368 | free_channel(newchannel); |
3e7ee490 HJ |
369 | return; |
370 | } | |
371 | ||
bd60c33e GKH |
372 | /* |
373 | * Start the process of binding this offer to the driver | |
374 | * We need to set the DeviceObject field before calling | |
375 | * VmbusChildDeviceAdd() | |
376 | */ | |
89733aa9 | 377 | newchannel->device_obj = vmbus_child_device_create( |
c50f7fb2 HZ |
378 | &newchannel->offermsg.offer.InterfaceType, |
379 | &newchannel->offermsg.offer.InterfaceInstance, | |
188963ec | 380 | newchannel); |
3e7ee490 | 381 | |
bd60c33e | 382 | DPRINT_DBG(VMBUS, "child device object allocated - %p", |
c50f7fb2 | 383 | newchannel->device_obj); |
3e7ee490 | 384 | |
454f18a9 BP |
385 | /* |
386 | * Add the new device to the bus. This will kick off device-driver | |
387 | * binding which eventually invokes the device driver's AddDevice() | |
388 | * method. | |
389 | */ | |
c50f7fb2 | 390 | ret = VmbusChildDeviceAdd(newchannel->device_obj); |
bd60c33e GKH |
391 | if (ret != 0) { |
392 | DPRINT_ERR(VMBUS, | |
393 | "unable to add child device object (relid %d)", | |
c50f7fb2 | 394 | newchannel->offermsg.child_relid); |
3e7ee490 | 395 | |
0f5e44ca | 396 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
c50f7fb2 | 397 | list_del(&newchannel->listentry); |
0f5e44ca | 398 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 399 | |
e98cb276 | 400 | free_channel(newchannel); |
bd60c33e | 401 | } else { |
454f18a9 BP |
402 | /* |
403 | * This state is used to indicate a successful open | |
404 | * so that when we do close the channel normally, we | |
405 | * can cleanup properly | |
406 | */ | |
c50f7fb2 | 407 | newchannel->state = CHANNEL_OPEN_STATE; |
c88c4e4c | 408 | |
8b5d6d3b HZ |
409 | /* Open IC channels */ |
410 | for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) { | |
c50f7fb2 | 411 | if (memcmp(&newchannel->offermsg.offer.InterfaceType, |
c88c4e4c | 412 | &hv_cb_utils[cnt].data, |
8b5d6d3b | 413 | sizeof(struct hv_guid)) == 0 && |
188963ec | 414 | vmbus_open(newchannel, 2 * PAGE_SIZE, |
8b5d6d3b HZ |
415 | 2 * PAGE_SIZE, NULL, 0, |
416 | hv_cb_utils[cnt].callback, | |
188963ec HZ |
417 | newchannel) == 0) { |
418 | hv_cb_utils[cnt].channel = newchannel; | |
c88c4e4c | 419 | DPRINT_INFO(VMBUS, "%s", |
8b5d6d3b HZ |
420 | hv_cb_utils[cnt].log_msg); |
421 | count_hv_channel(); | |
c88c4e4c | 422 | } |
c88c4e4c | 423 | } |
3e7ee490 | 424 | } |
3e7ee490 HJ |
425 | } |
426 | ||
3e189519 | 427 | /* |
e98cb276 | 428 | * vmbus_onoffer - Handler for channel offers from vmbus in parent partition. |
bd60c33e GKH |
429 | * |
430 | * We ignore all offers except network and storage offers. For each network and | |
431 | * storage offers, we create a channel object and queue a work item to the | |
432 | * channel object to process the offer synchronously | |
433 | */ | |
e98cb276 | 434 | static void vmbus_onoffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 435 | { |
bd60c33e | 436 | struct vmbus_channel_offer_channel *offer; |
188963ec HZ |
437 | struct vmbus_channel *newchannel; |
438 | struct hv_guid *guidtype; | |
439 | struct hv_guid *guidinstance; | |
3e7ee490 | 440 | int i; |
188963ec | 441 | int fsupported = 0; |
3e7ee490 | 442 | |
bd60c33e GKH |
443 | offer = (struct vmbus_channel_offer_channel *)hdr; |
444 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
c50f7fb2 | 445 | if (memcmp(&offer->offer.InterfaceType, |
bd60c33e | 446 | &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { |
188963ec | 447 | fsupported = 1; |
3e7ee490 HJ |
448 | break; |
449 | } | |
450 | } | |
451 | ||
188963ec | 452 | if (!fsupported) { |
bd60c33e | 453 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " |
c50f7fb2 | 454 | "child relid %d", offer->child_relid); |
3e7ee490 HJ |
455 | return; |
456 | } | |
457 | ||
c50f7fb2 HZ |
458 | guidtype = &offer->offer.InterfaceType; |
459 | guidinstance = &offer->offer.InterfaceInstance; | |
3e7ee490 | 460 | |
bd60c33e GKH |
461 | DPRINT_INFO(VMBUS, "Channel offer notification - " |
462 | "child relid %d monitor id %d allocated %d, " | |
463 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
464 | "%02x%02x%02x%02x%02x%02x%02x%02x} " | |
465 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
466 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
c50f7fb2 HZ |
467 | offer->child_relid, offer->monitorid, |
468 | offer->monitor_allocated, | |
188963ec HZ |
469 | guidtype->data[3], guidtype->data[2], |
470 | guidtype->data[1], guidtype->data[0], | |
471 | guidtype->data[5], guidtype->data[4], | |
472 | guidtype->data[7], guidtype->data[6], | |
473 | guidtype->data[8], guidtype->data[9], | |
474 | guidtype->data[10], guidtype->data[11], | |
475 | guidtype->data[12], guidtype->data[13], | |
476 | guidtype->data[14], guidtype->data[15], | |
477 | guidinstance->data[3], guidinstance->data[2], | |
478 | guidinstance->data[1], guidinstance->data[0], | |
479 | guidinstance->data[5], guidinstance->data[4], | |
480 | guidinstance->data[7], guidinstance->data[6], | |
481 | guidinstance->data[8], guidinstance->data[9], | |
482 | guidinstance->data[10], guidinstance->data[11], | |
483 | guidinstance->data[12], guidinstance->data[13], | |
484 | guidinstance->data[14], guidinstance->data[15]); | |
3e7ee490 | 485 | |
454f18a9 | 486 | /* Allocate the channel object and save this offer. */ |
e98cb276 | 487 | newchannel = alloc_channel(); |
188963ec | 488 | if (!newchannel) { |
3e7ee490 HJ |
489 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); |
490 | return; | |
491 | } | |
492 | ||
188963ec | 493 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newchannel); |
3e7ee490 | 494 | |
c50f7fb2 | 495 | memcpy(&newchannel->offermsg, offer, |
bd60c33e | 496 | sizeof(struct vmbus_channel_offer_channel)); |
c50f7fb2 HZ |
497 | newchannel->monitor_grp = (u8)offer->monitorid / 32; |
498 | newchannel->monitor_bit = (u8)offer->monitorid % 32; | |
3e7ee490 | 499 | |
454f18a9 | 500 | /* TODO: Make sure the offer comes from our parent partition */ |
4b2f9abe TT |
501 | INIT_WORK(&newchannel->work, vmbus_process_offer); |
502 | queue_work(newchannel->controlwq, &newchannel->work); | |
3e7ee490 HJ |
503 | } |
504 | ||
3e189519 | 505 | /* |
e98cb276 | 506 | * vmbus_onoffer_rescind - Rescind offer handler. |
bd60c33e GKH |
507 | * |
508 | * We queue a work item to process this offer synchronously | |
509 | */ | |
e98cb276 | 510 | static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 511 | { |
bd60c33e | 512 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 513 | struct vmbus_channel *channel; |
3e7ee490 | 514 | |
bd60c33e | 515 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
c50f7fb2 | 516 | channel = GetChannelFromRelId(rescind->child_relid); |
bd60c33e GKH |
517 | if (channel == NULL) { |
518 | DPRINT_DBG(VMBUS, "channel not found for relId %d", | |
c50f7fb2 | 519 | rescind->child_relid); |
3e7ee490 HJ |
520 | return; |
521 | } | |
522 | ||
4b2f9abe TT |
523 | /* work is initialized for vmbus_process_rescind_offer() from |
524 | * vmbus_process_offer() where the channel got created */ | |
525 | queue_work(channel->controlwq, &channel->work); | |
3e7ee490 HJ |
526 | } |
527 | ||
3e189519 | 528 | /* |
e98cb276 HZ |
529 | * vmbus_onoffers_delivered - |
530 | * This is invoked when all offers have been delivered. | |
bd60c33e GKH |
531 | * |
532 | * Nothing to do here. | |
533 | */ | |
e98cb276 | 534 | static void vmbus_onoffers_delivered( |
bd60c33e | 535 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 536 | { |
3e7ee490 HJ |
537 | } |
538 | ||
3e189519 | 539 | /* |
e98cb276 | 540 | * vmbus_onopen_result - Open result handler. |
bd60c33e GKH |
541 | * |
542 | * This is invoked when we received a response to our channel open request. | |
543 | * Find the matching request, copy the response and signal the requesting | |
544 | * thread. | |
545 | */ | |
e98cb276 | 546 | static void vmbus_onopen_result(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 547 | { |
bd60c33e | 548 | struct vmbus_channel_open_result *result; |
53af545b | 549 | struct list_head *curr; |
188963ec HZ |
550 | struct vmbus_channel_msginfo *msginfo; |
551 | struct vmbus_channel_message_header *requestheader; | |
552 | struct vmbus_channel_open_channel *openmsg; | |
dd0813b6 | 553 | unsigned long flags; |
3e7ee490 | 554 | |
bd60c33e | 555 | result = (struct vmbus_channel_open_result *)hdr; |
c50f7fb2 | 556 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->status); |
3e7ee490 | 557 | |
bd60c33e GKH |
558 | /* |
559 | * Find the open msg, copy the result and signal/unblock the wait event | |
560 | */ | |
dd0813b6 | 561 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 562 | |
53af545b BP |
563 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
564 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
565 | msginfo = (struct vmbus_channel_msginfo *)curr; |
566 | requestheader = | |
c50f7fb2 | 567 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 568 | |
c50f7fb2 | 569 | if (requestheader->msgtype == CHANNELMSG_OPENCHANNEL) { |
188963ec | 570 | openmsg = |
c50f7fb2 HZ |
571 | (struct vmbus_channel_open_channel *)msginfo->msg; |
572 | if (openmsg->child_relid == result->child_relid && | |
573 | openmsg->openid == result->openid) { | |
574 | memcpy(&msginfo->response.open_result, | |
bd60c33e GKH |
575 | result, |
576 | sizeof(struct vmbus_channel_open_result)); | |
203df82d | 577 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
578 | break; |
579 | } | |
580 | } | |
581 | } | |
dd0813b6 | 582 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
583 | } |
584 | ||
3e189519 | 585 | /* |
e98cb276 | 586 | * vmbus_ongpadl_created - GPADL created handler. |
bd60c33e GKH |
587 | * |
588 | * This is invoked when we received a response to our gpadl create request. | |
589 | * Find the matching request, copy the response and signal the requesting | |
590 | * thread. | |
591 | */ | |
e98cb276 | 592 | static void vmbus_ongpadl_created(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 593 | { |
188963ec | 594 | struct vmbus_channel_gpadl_created *gpadlcreated; |
53af545b | 595 | struct list_head *curr; |
188963ec HZ |
596 | struct vmbus_channel_msginfo *msginfo; |
597 | struct vmbus_channel_message_header *requestheader; | |
598 | struct vmbus_channel_gpadl_header *gpadlheader; | |
dd0813b6 | 599 | unsigned long flags; |
3e7ee490 | 600 | |
188963ec | 601 | gpadlcreated = (struct vmbus_channel_gpadl_created *)hdr; |
bd60c33e | 602 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", |
c50f7fb2 | 603 | gpadlcreated->creation_status); |
3e7ee490 | 604 | |
bd60c33e GKH |
605 | /* |
606 | * Find the establish msg, copy the result and signal/unblock the wait | |
607 | * event | |
608 | */ | |
dd0813b6 | 609 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 610 | |
53af545b BP |
611 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
612 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
613 | msginfo = (struct vmbus_channel_msginfo *)curr; |
614 | requestheader = | |
c50f7fb2 | 615 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 616 | |
c50f7fb2 | 617 | if (requestheader->msgtype == CHANNELMSG_GPADL_HEADER) { |
188963ec HZ |
618 | gpadlheader = |
619 | (struct vmbus_channel_gpadl_header *)requestheader; | |
620 | ||
c50f7fb2 HZ |
621 | if ((gpadlcreated->child_relid == |
622 | gpadlheader->child_relid) && | |
623 | (gpadlcreated->gpadl == gpadlheader->gpadl)) { | |
624 | memcpy(&msginfo->response.gpadl_created, | |
188963ec | 625 | gpadlcreated, |
bd60c33e | 626 | sizeof(struct vmbus_channel_gpadl_created)); |
203df82d | 627 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
628 | break; |
629 | } | |
630 | } | |
631 | } | |
dd0813b6 | 632 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
633 | } |
634 | ||
3e189519 | 635 | /* |
e98cb276 | 636 | * vmbus_ongpadl_torndown - GPADL torndown handler. |
bd60c33e GKH |
637 | * |
638 | * This is invoked when we received a response to our gpadl teardown request. | |
639 | * Find the matching request, copy the response and signal the requesting | |
640 | * thread. | |
641 | */ | |
e98cb276 | 642 | static void vmbus_ongpadl_torndown( |
bd60c33e | 643 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 644 | { |
188963ec | 645 | struct vmbus_channel_gpadl_torndown *gpadl_torndown; |
53af545b | 646 | struct list_head *curr; |
188963ec HZ |
647 | struct vmbus_channel_msginfo *msginfo; |
648 | struct vmbus_channel_message_header *requestheader; | |
649 | struct vmbus_channel_gpadl_teardown *gpadl_teardown; | |
dd0813b6 | 650 | unsigned long flags; |
3e7ee490 | 651 | |
188963ec | 652 | gpadl_torndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
bd60c33e GKH |
653 | |
654 | /* | |
655 | * Find the open msg, copy the result and signal/unblock the wait event | |
656 | */ | |
dd0813b6 | 657 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 658 | |
53af545b BP |
659 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
660 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
661 | msginfo = (struct vmbus_channel_msginfo *)curr; |
662 | requestheader = | |
c50f7fb2 | 663 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 664 | |
c50f7fb2 | 665 | if (requestheader->msgtype == CHANNELMSG_GPADL_TEARDOWN) { |
188963ec HZ |
666 | gpadl_teardown = |
667 | (struct vmbus_channel_gpadl_teardown *)requestheader; | |
3e7ee490 | 668 | |
c50f7fb2 HZ |
669 | if (gpadl_torndown->gpadl == gpadl_teardown->gpadl) { |
670 | memcpy(&msginfo->response.gpadl_torndown, | |
188963ec | 671 | gpadl_torndown, |
bd60c33e | 672 | sizeof(struct vmbus_channel_gpadl_torndown)); |
203df82d | 673 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
674 | break; |
675 | } | |
676 | } | |
677 | } | |
dd0813b6 | 678 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
679 | } |
680 | ||
3e189519 | 681 | /* |
e98cb276 | 682 | * vmbus_onversion_response - Version response handler |
bd60c33e GKH |
683 | * |
684 | * This is invoked when we received a response to our initiate contact request. | |
685 | * Find the matching request, copy the response and signal the requesting | |
686 | * thread. | |
687 | */ | |
e98cb276 | 688 | static void vmbus_onversion_response( |
bd60c33e | 689 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 690 | { |
53af545b | 691 | struct list_head *curr; |
188963ec HZ |
692 | struct vmbus_channel_msginfo *msginfo; |
693 | struct vmbus_channel_message_header *requestheader; | |
82250213 | 694 | struct vmbus_channel_initiate_contact *initiate; |
188963ec | 695 | struct vmbus_channel_version_response *version_response; |
dd0813b6 | 696 | unsigned long flags; |
3e7ee490 | 697 | |
188963ec | 698 | version_response = (struct vmbus_channel_version_response *)hdr; |
dd0813b6 | 699 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 700 | |
53af545b BP |
701 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
702 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
703 | msginfo = (struct vmbus_channel_msginfo *)curr; |
704 | requestheader = | |
c50f7fb2 | 705 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 706 | |
c50f7fb2 HZ |
707 | if (requestheader->msgtype == |
708 | CHANNELMSG_INITIATE_CONTACT) { | |
188963ec HZ |
709 | initiate = |
710 | (struct vmbus_channel_initiate_contact *)requestheader; | |
c50f7fb2 | 711 | memcpy(&msginfo->response.version_response, |
188963ec | 712 | version_response, |
bd60c33e | 713 | sizeof(struct vmbus_channel_version_response)); |
203df82d | 714 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
715 | } |
716 | } | |
dd0813b6 | 717 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
718 | } |
719 | ||
c8212f04 GKH |
720 | /* Channel message dispatch table */ |
721 | static struct vmbus_channel_message_table_entry | |
c50f7fb2 HZ |
722 | gChannelMessageTable[CHANNELMSG_COUNT] = { |
723 | {CHANNELMSG_INVALID, NULL}, | |
724 | {CHANNELMSG_OFFERCHANNEL, vmbus_onoffer}, | |
725 | {CHANNELMSG_RESCIND_CHANNELOFFER, vmbus_onoffer_rescind}, | |
726 | {CHANNELMSG_REQUESTOFFERS, NULL}, | |
727 | {CHANNELMSG_ALLOFFERS_DELIVERED, vmbus_onoffers_delivered}, | |
728 | {CHANNELMSG_OPENCHANNEL, NULL}, | |
729 | {CHANNELMSG_OPENCHANNEL_RESULT, vmbus_onopen_result}, | |
730 | {CHANNELMSG_CLOSECHANNEL, NULL}, | |
731 | {CHANNELMSG_GPADL_HEADER, NULL}, | |
732 | {CHANNELMSG_GPADL_BODY, NULL}, | |
733 | {CHANNELMSG_GPADL_CREATED, vmbus_ongpadl_created}, | |
734 | {CHANNELMSG_GPADL_TEARDOWN, NULL}, | |
735 | {CHANNELMSG_GPADL_TORNDOWN, vmbus_ongpadl_torndown}, | |
736 | {CHANNELMSG_RELID_RELEASED, NULL}, | |
737 | {CHANNELMSG_INITIATE_CONTACT, NULL}, | |
738 | {CHANNELMSG_VERSION_RESPONSE, vmbus_onversion_response}, | |
739 | {CHANNELMSG_UNLOAD, NULL}, | |
c8212f04 GKH |
740 | }; |
741 | ||
3e189519 | 742 | /* |
e98cb276 | 743 | * vmbus_onmessage - Handler for channel protocol messages. |
bd60c33e GKH |
744 | * |
745 | * This is invoked in the vmbus worker thread context. | |
746 | */ | |
e98cb276 | 747 | void vmbus_onmessage(void *context) |
3e7ee490 | 748 | { |
188963ec | 749 | struct hv_message *msg = context; |
82250213 | 750 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
751 | int size; |
752 | ||
f6feebe0 HZ |
753 | hdr = (struct vmbus_channel_message_header *)msg->u.payload; |
754 | size = msg->header.payload_size; | |
3e7ee490 | 755 | |
c50f7fb2 | 756 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->msgtype, size); |
3e7ee490 | 757 | |
c50f7fb2 | 758 | if (hdr->msgtype >= CHANNELMSG_COUNT) { |
bd60c33e GKH |
759 | DPRINT_ERR(VMBUS, |
760 | "Received invalid channel message type %d size %d", | |
c50f7fb2 | 761 | hdr->msgtype, size); |
04f50c4d | 762 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
f6feebe0 | 763 | (unsigned char *)msg->u.payload, size); |
3e7ee490 HJ |
764 | return; |
765 | } | |
766 | ||
c50f7fb2 HZ |
767 | if (gChannelMessageTable[hdr->msgtype].messageHandler) |
768 | gChannelMessageTable[hdr->msgtype].messageHandler(hdr); | |
3e7ee490 | 769 | else |
bd60c33e | 770 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", |
c50f7fb2 | 771 | hdr->msgtype); |
3e7ee490 HJ |
772 | } |
773 | ||
3e189519 | 774 | /* |
e98cb276 | 775 | * vmbus_request_offers - Send a request to get all our pending offers. |
bd60c33e | 776 | */ |
e98cb276 | 777 | int vmbus_request_offers(void) |
3e7ee490 | 778 | { |
82250213 | 779 | struct vmbus_channel_message_header *msg; |
188963ec | 780 | struct vmbus_channel_msginfo *msginfo; |
bd60c33e | 781 | int ret; |
3e7ee490 | 782 | |
188963ec | 783 | msginfo = kmalloc(sizeof(*msginfo) + |
bd60c33e GKH |
784 | sizeof(struct vmbus_channel_message_header), |
785 | GFP_KERNEL); | |
188963ec | 786 | if (!msginfo) |
75910f23 | 787 | return -ENOMEM; |
3e7ee490 | 788 | |
203df82d | 789 | msginfo->waitevent = osd_waitevent_create(); |
c50f7fb2 | 790 | if (!msginfo->waitevent) { |
188963ec | 791 | kfree(msginfo); |
75910f23 BP |
792 | return -ENOMEM; |
793 | } | |
794 | ||
c50f7fb2 | 795 | msg = (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 796 | |
c50f7fb2 | 797 | msg->msgtype = CHANNELMSG_REQUESTOFFERS; |
3e7ee490 HJ |
798 | |
799 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
bd60c33e GKH |
800 | INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, |
801 | &msgInfo->msgListEntry); | |
3e7ee490 HJ |
802 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ |
803 | ||
bd60c33e GKH |
804 | ret = VmbusPostMessage(msg, |
805 | sizeof(struct vmbus_channel_message_header)); | |
806 | if (ret != 0) { | |
3e7ee490 HJ |
807 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); |
808 | ||
809 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
810 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
811 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
812 | ||
813 | goto Cleanup; | |
814 | } | |
203df82d | 815 | /* osd_waitevent_wait(msgInfo->waitEvent); */ |
3e7ee490 HJ |
816 | |
817 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
818 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
819 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
820 | ||
821 | ||
822 | Cleanup: | |
188963ec | 823 | if (msginfo) { |
c50f7fb2 | 824 | kfree(msginfo->waitevent); |
188963ec | 825 | kfree(msginfo); |
3e7ee490 HJ |
826 | } |
827 | ||
3e7ee490 HJ |
828 | return ret; |
829 | } | |
830 | ||
3e189519 | 831 | /* |
e98cb276 | 832 | * vmbus_release_unattached_channels - Release channels that are |
3e189519 | 833 | * unattached/unconnected ie (no drivers associated) |
bd60c33e | 834 | */ |
e98cb276 | 835 | void vmbus_release_unattached_channels(void) |
3e7ee490 | 836 | { |
53af545b | 837 | struct vmbus_channel *channel, *pos; |
aded7165 | 838 | struct vmbus_channel *start = NULL; |
0f5e44ca | 839 | unsigned long flags; |
3e7ee490 | 840 | |
0f5e44ca | 841 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 842 | |
53af545b | 843 | list_for_each_entry_safe(channel, pos, &gVmbusConnection.ChannelList, |
c50f7fb2 | 844 | listentry) { |
3e7ee490 HJ |
845 | if (channel == start) |
846 | break; | |
847 | ||
c50f7fb2 HZ |
848 | if (!channel->device_obj->Driver) { |
849 | list_del(&channel->listentry); | |
bd60c33e GKH |
850 | DPRINT_INFO(VMBUS, |
851 | "Releasing unattached device object %p", | |
c50f7fb2 | 852 | channel->device_obj); |
3e7ee490 | 853 | |
9d8bd71a | 854 | vmbus_child_device_unregister(channel->device_obj); |
e98cb276 | 855 | free_channel(channel); |
bd60c33e | 856 | } else { |
3e7ee490 | 857 | if (!start) |
3e7ee490 | 858 | start = channel; |
3e7ee490 HJ |
859 | } |
860 | } | |
861 | ||
0f5e44ca | 862 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
863 | } |
864 | ||
454f18a9 | 865 | /* eof */ |