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 | 21 | #include <linux/kernel.h> |
0c3b7b2f S |
22 | #include <linux/sched.h> |
23 | #include <linux/wait.h> | |
a0086dc5 | 24 | #include <linux/mm.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
53af545b | 26 | #include <linux/list.h> |
c88c4e4c | 27 | #include <linux/module.h> |
8b5d6d3b | 28 | #include <linux/completion.h> |
e3fe0bb6 | 29 | #include "hv_api.h" |
645954c5 | 30 | #include "logging.h" |
72daf320 | 31 | #include "vmbus_private.h" |
c88c4e4c | 32 | #include "utils.h" |
3e7ee490 | 33 | |
1d7e907f | 34 | struct vmbus_channel_message_table_entry { |
c8212f04 GKH |
35 | enum vmbus_channel_message_type messageType; |
36 | void (*messageHandler)(struct vmbus_channel_message_header *msg); | |
1d7e907f | 37 | }; |
3e7ee490 | 38 | |
245ba56a KS |
39 | #define MAX_MSG_TYPES 4 |
40 | #define MAX_NUM_DEVICE_CLASSES_SUPPORTED 8 | |
c88c4e4c | 41 | |
bd60c33e | 42 | static const struct hv_guid |
c88c4e4c | 43 | gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = { |
454f18a9 | 44 | /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ |
caf26a31 GKH |
45 | /* Storage - SCSI */ |
46 | { | |
47 | .data = { | |
48 | 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
49 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f | |
50 | } | |
51 | }, | |
52 | ||
454f18a9 | 53 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
caf26a31 GKH |
54 | /* Network */ |
55 | { | |
56 | .data = { | |
57 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
58 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
59 | } | |
60 | }, | |
61 | ||
454f18a9 | 62 | /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */ |
caf26a31 GKH |
63 | /* Input */ |
64 | { | |
65 | .data = { | |
66 | 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c, | |
67 | 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A | |
68 | } | |
69 | }, | |
3e7ee490 | 70 | |
caf26a31 GKH |
71 | /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ |
72 | /* IDE */ | |
73 | { | |
74 | .data = { | |
75 | 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, | |
76 | 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 | |
77 | } | |
78 | }, | |
c88c4e4c HJ |
79 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ |
80 | /* Shutdown */ | |
81 | { | |
82 | .data = { | |
83 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
84 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
85 | } | |
86 | }, | |
39c4e9c3 HZ |
87 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ |
88 | /* TimeSync */ | |
89 | { | |
90 | .data = { | |
91 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
92 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
93 | } | |
94 | }, | |
9153f7b9 HJ |
95 | /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ |
96 | /* Heartbeat */ | |
97 | { | |
98 | .data = { | |
99 | 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, | |
100 | 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d | |
101 | } | |
102 | }, | |
245ba56a KS |
103 | /* {A9A0F4E7-5A45-4d96-B827-8A841E8C03E6} */ |
104 | /* KVP */ | |
105 | { | |
106 | .data = { | |
107 | 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, | |
108 | 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6 | |
109 | } | |
110 | }, | |
111 | ||
3e7ee490 HJ |
112 | }; |
113 | ||
c88c4e4c HJ |
114 | |
115 | /** | |
116 | * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message | |
117 | * @icmsghdrp: Pointer to msg header structure | |
118 | * @icmsg_negotiate: Pointer to negotiate message structure | |
119 | * @buf: Raw buffer channel data | |
120 | * | |
121 | * @icmsghdrp is of type &struct icmsg_hdr. | |
122 | * @negop is of type &struct icmsg_negotiate. | |
123 | * Set up and fill in default negotiate response message. This response can | |
124 | * come from both the vmbus driver and the hv_utils driver. The current api | |
125 | * will respond properly to both Windows 2008 and Windows 2008-R2 operating | |
126 | * systems. | |
127 | * | |
128 | * Mainly used by Hyper-V drivers. | |
129 | */ | |
130 | void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, | |
131 | struct icmsg_negotiate *negop, | |
132 | u8 *buf) | |
133 | { | |
134 | if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { | |
135 | icmsghdrp->icmsgsize = 0x10; | |
136 | ||
137 | negop = (struct icmsg_negotiate *)&buf[ | |
138 | sizeof(struct vmbuspipe_hdr) + | |
139 | sizeof(struct icmsg_hdr)]; | |
140 | ||
141 | if (negop->icframe_vercnt == 2 && | |
142 | negop->icversion_data[1].major == 3) { | |
143 | negop->icversion_data[0].major = 3; | |
144 | negop->icversion_data[0].minor = 0; | |
145 | negop->icversion_data[1].major = 3; | |
146 | negop->icversion_data[1].minor = 0; | |
147 | } else { | |
148 | negop->icversion_data[0].major = 1; | |
149 | negop->icversion_data[0].minor = 0; | |
150 | negop->icversion_data[1].major = 1; | |
151 | negop->icversion_data[1].minor = 0; | |
152 | } | |
153 | ||
154 | negop->icframe_vercnt = 1; | |
155 | negop->icmsg_vercnt = 1; | |
156 | } | |
157 | } | |
158 | EXPORT_SYMBOL(prep_negotiate_resp); | |
159 | ||
160 | /** | |
161 | * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK | |
162 | * Hyper-V requests | |
163 | * @context: Pointer to argument structure. | |
164 | * | |
165 | * Set up the default handler for non device driver specific requests | |
166 | * from Hyper-V. This stub responds to the default negotiate messages | |
167 | * that come in for every non IDE/SCSI/Network request. | |
168 | * This behavior is normally overwritten in the hv_utils driver. That | |
169 | * driver handles requests like gracefull shutdown, heartbeats etc. | |
170 | * | |
171 | * Mainly used by Hyper-V drivers. | |
172 | */ | |
173 | void chn_cb_negotiate(void *context) | |
174 | { | |
175 | struct vmbus_channel *channel = context; | |
176 | u8 *buf; | |
177 | u32 buflen, recvlen; | |
178 | u64 requestid; | |
179 | ||
180 | struct icmsg_hdr *icmsghdrp; | |
181 | struct icmsg_negotiate *negop = NULL; | |
182 | ||
183 | buflen = PAGE_SIZE; | |
184 | buf = kmalloc(buflen, GFP_ATOMIC); | |
185 | ||
fff41b2e | 186 | vmbus_recvpacket(channel, buf, buflen, &recvlen, &requestid); |
c88c4e4c HJ |
187 | |
188 | if (recvlen > 0) { | |
189 | icmsghdrp = (struct icmsg_hdr *)&buf[ | |
190 | sizeof(struct vmbuspipe_hdr)]; | |
191 | ||
192 | prep_negotiate_resp(icmsghdrp, negop, buf); | |
193 | ||
194 | icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | |
195 | | ICMSGHDRFLAG_RESPONSE; | |
196 | ||
fff41b2e | 197 | vmbus_sendpacket(channel, buf, |
c88c4e4c | 198 | recvlen, requestid, |
415f2287 | 199 | VM_PKT_DATA_INBAND, 0); |
c88c4e4c HJ |
200 | } |
201 | ||
202 | kfree(buf); | |
203 | } | |
204 | EXPORT_SYMBOL(chn_cb_negotiate); | |
205 | ||
206 | /* | |
207 | * Function table used for message responses for non IDE/SCSI/Network type | |
208 | * messages. (Such as KVP/Shutdown etc) | |
209 | */ | |
210 | struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = { | |
211 | /* 0E0B6031-5213-4934-818B-38D90CED39DB */ | |
212 | /* Shutdown */ | |
213 | { | |
214 | .msg_type = HV_SHUTDOWN_MSG, | |
215 | .data = { | |
216 | 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49, | |
217 | 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB | |
218 | }, | |
219 | .callback = chn_cb_negotiate, | |
220 | .log_msg = "Shutdown channel functionality initialized" | |
221 | }, | |
39c4e9c3 HZ |
222 | |
223 | /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */ | |
224 | /* TimeSync */ | |
225 | { | |
226 | .msg_type = HV_TIMESYNC_MSG, | |
227 | .data = { | |
228 | 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, | |
229 | 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf | |
230 | }, | |
231 | .callback = chn_cb_negotiate, | |
232 | .log_msg = "Timesync channel functionality initialized" | |
233 | }, | |
9153f7b9 HJ |
234 | /* {57164f39-9115-4e78-ab55-382f3bd5422d} */ |
235 | /* Heartbeat */ | |
236 | { | |
237 | .msg_type = HV_HEARTBEAT_MSG, | |
238 | .data = { | |
239 | 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, | |
240 | 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d | |
241 | }, | |
242 | .callback = chn_cb_negotiate, | |
243 | .log_msg = "Heartbeat channel functionality initialized" | |
244 | }, | |
245ba56a KS |
245 | /* {A9A0F4E7-5A45-4d96-B827-8A841E8C03E6} */ |
246 | /* KVP */ | |
247 | { | |
248 | .data = { | |
249 | 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, | |
250 | 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6 | |
251 | }, | |
252 | .callback = chn_cb_negotiate, | |
253 | .log_msg = "KVP channel functionality initialized" | |
254 | }, | |
c88c4e4c HJ |
255 | }; |
256 | EXPORT_SYMBOL(hv_cb_utils); | |
257 | ||
3e189519 | 258 | /* |
e98cb276 | 259 | * alloc_channel - Allocate and initialize a vmbus channel object |
bd60c33e | 260 | */ |
50fe56d2 | 261 | static struct vmbus_channel *alloc_channel(void) |
3e7ee490 | 262 | { |
aded7165 | 263 | struct vmbus_channel *channel; |
3e7ee490 | 264 | |
aded7165 | 265 | channel = kzalloc(sizeof(*channel), GFP_ATOMIC); |
3e7ee490 | 266 | if (!channel) |
3e7ee490 | 267 | return NULL; |
3e7ee490 | 268 | |
54411c42 | 269 | spin_lock_init(&channel->inbound_lock); |
3e7ee490 | 270 | |
c8a429a4 GKH |
271 | init_timer(&channel->poll_timer); |
272 | channel->poll_timer.data = (unsigned long)channel; | |
fff41b2e | 273 | channel->poll_timer.function = vmbus_ontimer; |
3e7ee490 | 274 | |
c50f7fb2 HZ |
275 | channel->controlwq = create_workqueue("hv_vmbus_ctl"); |
276 | if (!channel->controlwq) { | |
8c69f52a | 277 | kfree(channel); |
3e7ee490 HJ |
278 | return NULL; |
279 | } | |
280 | ||
281 | return channel; | |
282 | } | |
283 | ||
3e189519 | 284 | /* |
e98cb276 | 285 | * release_hannel - Release the vmbus channel object itself |
bd60c33e | 286 | */ |
4b2f9abe | 287 | static void release_channel(struct work_struct *work) |
3e7ee490 | 288 | { |
4b2f9abe TT |
289 | struct vmbus_channel *channel = container_of(work, |
290 | struct vmbus_channel, | |
291 | work); | |
3e7ee490 | 292 | |
3e7ee490 | 293 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); |
c50f7fb2 | 294 | destroy_workqueue(channel->controlwq); |
3e7ee490 HJ |
295 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
296 | ||
8c69f52a | 297 | kfree(channel); |
3e7ee490 HJ |
298 | } |
299 | ||
3e189519 | 300 | /* |
e98cb276 | 301 | * free_channel - Release the resources used by the vmbus channel object |
bd60c33e | 302 | */ |
e98cb276 | 303 | void free_channel(struct vmbus_channel *channel) |
3e7ee490 | 304 | { |
188963ec | 305 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 306 | |
bd60c33e GKH |
307 | /* |
308 | * We have to release the channel's workqueue/thread in the vmbus's | |
309 | * workqueue/thread context | |
310 | * ie we can't destroy ourselves. | |
311 | */ | |
4b2f9abe | 312 | INIT_WORK(&channel->work, release_channel); |
da9fcb72 | 313 | queue_work(vmbus_connection.work_queue, &channel->work); |
3e7ee490 HJ |
314 | } |
315 | ||
8b5d6d3b HZ |
316 | |
317 | DECLARE_COMPLETION(hv_channel_ready); | |
318 | ||
319 | /* | |
320 | * Count initialized channels, and ensure all channels are ready when hv_vmbus | |
321 | * module loading completes. | |
322 | */ | |
323 | static void count_hv_channel(void) | |
324 | { | |
325 | static int counter; | |
326 | unsigned long flags; | |
327 | ||
15b2f647 | 328 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
8b5d6d3b HZ |
329 | if (++counter == MAX_MSG_TYPES) |
330 | complete(&hv_channel_ready); | |
15b2f647 | 331 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
8b5d6d3b HZ |
332 | } |
333 | ||
4b2f9abe TT |
334 | /* |
335 | * vmbus_process_rescind_offer - | |
336 | * Rescind the offer by initiating a device removal | |
337 | */ | |
338 | static void vmbus_process_rescind_offer(struct work_struct *work) | |
339 | { | |
340 | struct vmbus_channel *channel = container_of(work, | |
341 | struct vmbus_channel, | |
342 | work); | |
343 | ||
344 | vmbus_child_device_unregister(channel->device_obj); | |
345 | } | |
8b5d6d3b | 346 | |
3e189519 | 347 | /* |
e98cb276 | 348 | * vmbus_process_offer - Process the offer by creating a channel/device |
c88c4e4c | 349 | * associated with this offer |
bd60c33e | 350 | */ |
4b2f9abe | 351 | static void vmbus_process_offer(struct work_struct *work) |
3e7ee490 | 352 | { |
4b2f9abe TT |
353 | struct vmbus_channel *newchannel = container_of(work, |
354 | struct vmbus_channel, | |
355 | work); | |
aded7165 | 356 | struct vmbus_channel *channel; |
188963ec | 357 | bool fnew = true; |
bd60c33e | 358 | int ret; |
c88c4e4c | 359 | int cnt; |
0f5e44ca | 360 | unsigned long flags; |
3e7ee490 | 361 | |
4b2f9abe TT |
362 | /* The next possible work is rescind handling */ |
363 | INIT_WORK(&newchannel->work, vmbus_process_rescind_offer); | |
364 | ||
454f18a9 | 365 | /* Make sure this is a new offer */ |
15b2f647 | 366 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 367 | |
da9fcb72 | 368 | list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) { |
767dff68 HZ |
369 | if (!memcmp(&channel->offermsg.offer.if_type, |
370 | &newchannel->offermsg.offer.if_type, | |
bd60c33e | 371 | sizeof(struct hv_guid)) && |
767dff68 HZ |
372 | !memcmp(&channel->offermsg.offer.if_instance, |
373 | &newchannel->offermsg.offer.if_instance, | |
bd60c33e | 374 | sizeof(struct hv_guid))) { |
188963ec | 375 | fnew = false; |
3e7ee490 HJ |
376 | break; |
377 | } | |
378 | } | |
379 | ||
188963ec | 380 | if (fnew) |
c50f7fb2 | 381 | list_add_tail(&newchannel->listentry, |
da9fcb72 | 382 | &vmbus_connection.chn_list); |
bd60c33e | 383 | |
15b2f647 | 384 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 385 | |
188963ec | 386 | if (!fnew) { |
bd60c33e | 387 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", |
c50f7fb2 | 388 | newchannel->offermsg.child_relid); |
e98cb276 | 389 | free_channel(newchannel); |
3e7ee490 HJ |
390 | return; |
391 | } | |
392 | ||
bd60c33e GKH |
393 | /* |
394 | * Start the process of binding this offer to the driver | |
395 | * We need to set the DeviceObject field before calling | |
646f1ea3 | 396 | * vmbus_child_dev_add() |
bd60c33e | 397 | */ |
89733aa9 | 398 | newchannel->device_obj = vmbus_child_device_create( |
767dff68 HZ |
399 | &newchannel->offermsg.offer.if_type, |
400 | &newchannel->offermsg.offer.if_instance, | |
188963ec | 401 | newchannel); |
3e7ee490 | 402 | |
bd60c33e | 403 | DPRINT_DBG(VMBUS, "child device object allocated - %p", |
c50f7fb2 | 404 | newchannel->device_obj); |
3e7ee490 | 405 | |
454f18a9 BP |
406 | /* |
407 | * Add the new device to the bus. This will kick off device-driver | |
408 | * binding which eventually invokes the device driver's AddDevice() | |
409 | * method. | |
410 | */ | |
646f1ea3 | 411 | ret = vmbus_child_dev_add(newchannel->device_obj); |
bd60c33e GKH |
412 | if (ret != 0) { |
413 | DPRINT_ERR(VMBUS, | |
414 | "unable to add child device object (relid %d)", | |
c50f7fb2 | 415 | newchannel->offermsg.child_relid); |
3e7ee490 | 416 | |
15b2f647 | 417 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
c50f7fb2 | 418 | list_del(&newchannel->listentry); |
15b2f647 | 419 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 420 | |
e98cb276 | 421 | free_channel(newchannel); |
bd60c33e | 422 | } else { |
454f18a9 BP |
423 | /* |
424 | * This state is used to indicate a successful open | |
425 | * so that when we do close the channel normally, we | |
426 | * can cleanup properly | |
427 | */ | |
c50f7fb2 | 428 | newchannel->state = CHANNEL_OPEN_STATE; |
c88c4e4c | 429 | |
8b5d6d3b HZ |
430 | /* Open IC channels */ |
431 | for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) { | |
767dff68 | 432 | if (memcmp(&newchannel->offermsg.offer.if_type, |
c88c4e4c | 433 | &hv_cb_utils[cnt].data, |
8b5d6d3b | 434 | sizeof(struct hv_guid)) == 0 && |
188963ec | 435 | vmbus_open(newchannel, 2 * PAGE_SIZE, |
8b5d6d3b HZ |
436 | 2 * PAGE_SIZE, NULL, 0, |
437 | hv_cb_utils[cnt].callback, | |
188963ec HZ |
438 | newchannel) == 0) { |
439 | hv_cb_utils[cnt].channel = newchannel; | |
c88c4e4c | 440 | DPRINT_INFO(VMBUS, "%s", |
8b5d6d3b HZ |
441 | hv_cb_utils[cnt].log_msg); |
442 | count_hv_channel(); | |
c88c4e4c | 443 | } |
c88c4e4c | 444 | } |
3e7ee490 | 445 | } |
3e7ee490 HJ |
446 | } |
447 | ||
3e189519 | 448 | /* |
e98cb276 | 449 | * vmbus_onoffer - Handler for channel offers from vmbus in parent partition. |
bd60c33e GKH |
450 | * |
451 | * We ignore all offers except network and storage offers. For each network and | |
452 | * storage offers, we create a channel object and queue a work item to the | |
453 | * channel object to process the offer synchronously | |
454 | */ | |
e98cb276 | 455 | static void vmbus_onoffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 456 | { |
bd60c33e | 457 | struct vmbus_channel_offer_channel *offer; |
188963ec HZ |
458 | struct vmbus_channel *newchannel; |
459 | struct hv_guid *guidtype; | |
460 | struct hv_guid *guidinstance; | |
3e7ee490 | 461 | int i; |
188963ec | 462 | int fsupported = 0; |
3e7ee490 | 463 | |
bd60c33e GKH |
464 | offer = (struct vmbus_channel_offer_channel *)hdr; |
465 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
767dff68 | 466 | if (memcmp(&offer->offer.if_type, |
bd60c33e | 467 | &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { |
188963ec | 468 | fsupported = 1; |
3e7ee490 HJ |
469 | break; |
470 | } | |
471 | } | |
472 | ||
188963ec | 473 | if (!fsupported) { |
bd60c33e | 474 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " |
c50f7fb2 | 475 | "child relid %d", offer->child_relid); |
3e7ee490 HJ |
476 | return; |
477 | } | |
478 | ||
767dff68 HZ |
479 | guidtype = &offer->offer.if_type; |
480 | guidinstance = &offer->offer.if_instance; | |
3e7ee490 | 481 | |
bd60c33e GKH |
482 | DPRINT_INFO(VMBUS, "Channel offer notification - " |
483 | "child relid %d monitor id %d allocated %d, " | |
484 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
485 | "%02x%02x%02x%02x%02x%02x%02x%02x} " | |
486 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
487 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
c50f7fb2 HZ |
488 | offer->child_relid, offer->monitorid, |
489 | offer->monitor_allocated, | |
188963ec HZ |
490 | guidtype->data[3], guidtype->data[2], |
491 | guidtype->data[1], guidtype->data[0], | |
492 | guidtype->data[5], guidtype->data[4], | |
493 | guidtype->data[7], guidtype->data[6], | |
494 | guidtype->data[8], guidtype->data[9], | |
495 | guidtype->data[10], guidtype->data[11], | |
496 | guidtype->data[12], guidtype->data[13], | |
497 | guidtype->data[14], guidtype->data[15], | |
498 | guidinstance->data[3], guidinstance->data[2], | |
499 | guidinstance->data[1], guidinstance->data[0], | |
500 | guidinstance->data[5], guidinstance->data[4], | |
501 | guidinstance->data[7], guidinstance->data[6], | |
502 | guidinstance->data[8], guidinstance->data[9], | |
503 | guidinstance->data[10], guidinstance->data[11], | |
504 | guidinstance->data[12], guidinstance->data[13], | |
505 | guidinstance->data[14], guidinstance->data[15]); | |
3e7ee490 | 506 | |
454f18a9 | 507 | /* Allocate the channel object and save this offer. */ |
e98cb276 | 508 | newchannel = alloc_channel(); |
188963ec | 509 | if (!newchannel) { |
3e7ee490 HJ |
510 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); |
511 | return; | |
512 | } | |
513 | ||
188963ec | 514 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newchannel); |
3e7ee490 | 515 | |
c50f7fb2 | 516 | memcpy(&newchannel->offermsg, offer, |
bd60c33e | 517 | sizeof(struct vmbus_channel_offer_channel)); |
c50f7fb2 HZ |
518 | newchannel->monitor_grp = (u8)offer->monitorid / 32; |
519 | newchannel->monitor_bit = (u8)offer->monitorid % 32; | |
3e7ee490 | 520 | |
454f18a9 | 521 | /* TODO: Make sure the offer comes from our parent partition */ |
4b2f9abe TT |
522 | INIT_WORK(&newchannel->work, vmbus_process_offer); |
523 | queue_work(newchannel->controlwq, &newchannel->work); | |
3e7ee490 HJ |
524 | } |
525 | ||
3e189519 | 526 | /* |
e98cb276 | 527 | * vmbus_onoffer_rescind - Rescind offer handler. |
bd60c33e GKH |
528 | * |
529 | * We queue a work item to process this offer synchronously | |
530 | */ | |
e98cb276 | 531 | static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 532 | { |
bd60c33e | 533 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 534 | struct vmbus_channel *channel; |
3e7ee490 | 535 | |
bd60c33e | 536 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
c6977677 | 537 | channel = relid2channel(rescind->child_relid); |
bd60c33e GKH |
538 | if (channel == NULL) { |
539 | DPRINT_DBG(VMBUS, "channel not found for relId %d", | |
c50f7fb2 | 540 | rescind->child_relid); |
3e7ee490 HJ |
541 | return; |
542 | } | |
543 | ||
4b2f9abe TT |
544 | /* work is initialized for vmbus_process_rescind_offer() from |
545 | * vmbus_process_offer() where the channel got created */ | |
546 | queue_work(channel->controlwq, &channel->work); | |
3e7ee490 HJ |
547 | } |
548 | ||
3e189519 | 549 | /* |
e98cb276 HZ |
550 | * vmbus_onoffers_delivered - |
551 | * This is invoked when all offers have been delivered. | |
bd60c33e GKH |
552 | * |
553 | * Nothing to do here. | |
554 | */ | |
e98cb276 | 555 | static void vmbus_onoffers_delivered( |
bd60c33e | 556 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 557 | { |
3e7ee490 HJ |
558 | } |
559 | ||
3e189519 | 560 | /* |
e98cb276 | 561 | * vmbus_onopen_result - Open result handler. |
bd60c33e GKH |
562 | * |
563 | * This is invoked when we received a response to our channel open request. | |
564 | * Find the matching request, copy the response and signal the requesting | |
565 | * thread. | |
566 | */ | |
e98cb276 | 567 | static void vmbus_onopen_result(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 568 | { |
bd60c33e | 569 | struct vmbus_channel_open_result *result; |
53af545b | 570 | struct list_head *curr; |
188963ec HZ |
571 | struct vmbus_channel_msginfo *msginfo; |
572 | struct vmbus_channel_message_header *requestheader; | |
573 | struct vmbus_channel_open_channel *openmsg; | |
dd0813b6 | 574 | unsigned long flags; |
3e7ee490 | 575 | |
bd60c33e | 576 | result = (struct vmbus_channel_open_result *)hdr; |
c50f7fb2 | 577 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->status); |
3e7ee490 | 578 | |
bd60c33e GKH |
579 | /* |
580 | * Find the open msg, copy the result and signal/unblock the wait event | |
581 | */ | |
15b2f647 | 582 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 583 | |
da9fcb72 | 584 | list_for_each(curr, &vmbus_connection.chn_msg_list) { |
53af545b | 585 | /* FIXME: this should probably use list_entry() instead */ |
188963ec HZ |
586 | msginfo = (struct vmbus_channel_msginfo *)curr; |
587 | requestheader = | |
c50f7fb2 | 588 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 589 | |
c50f7fb2 | 590 | if (requestheader->msgtype == CHANNELMSG_OPENCHANNEL) { |
188963ec | 591 | openmsg = |
c50f7fb2 HZ |
592 | (struct vmbus_channel_open_channel *)msginfo->msg; |
593 | if (openmsg->child_relid == result->child_relid && | |
594 | openmsg->openid == result->openid) { | |
595 | memcpy(&msginfo->response.open_result, | |
bd60c33e GKH |
596 | result, |
597 | sizeof(struct vmbus_channel_open_result)); | |
0c3b7b2f S |
598 | msginfo->wait_condition = 1; |
599 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
600 | break; |
601 | } | |
602 | } | |
603 | } | |
15b2f647 | 604 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
605 | } |
606 | ||
3e189519 | 607 | /* |
e98cb276 | 608 | * vmbus_ongpadl_created - GPADL created handler. |
bd60c33e GKH |
609 | * |
610 | * This is invoked when we received a response to our gpadl create request. | |
611 | * Find the matching request, copy the response and signal the requesting | |
612 | * thread. | |
613 | */ | |
e98cb276 | 614 | static void vmbus_ongpadl_created(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 615 | { |
188963ec | 616 | struct vmbus_channel_gpadl_created *gpadlcreated; |
53af545b | 617 | struct list_head *curr; |
188963ec HZ |
618 | struct vmbus_channel_msginfo *msginfo; |
619 | struct vmbus_channel_message_header *requestheader; | |
620 | struct vmbus_channel_gpadl_header *gpadlheader; | |
dd0813b6 | 621 | unsigned long flags; |
3e7ee490 | 622 | |
188963ec | 623 | gpadlcreated = (struct vmbus_channel_gpadl_created *)hdr; |
bd60c33e | 624 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", |
c50f7fb2 | 625 | gpadlcreated->creation_status); |
3e7ee490 | 626 | |
bd60c33e GKH |
627 | /* |
628 | * Find the establish msg, copy the result and signal/unblock the wait | |
629 | * event | |
630 | */ | |
15b2f647 | 631 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 632 | |
da9fcb72 | 633 | list_for_each(curr, &vmbus_connection.chn_msg_list) { |
53af545b | 634 | /* FIXME: this should probably use list_entry() instead */ |
188963ec HZ |
635 | msginfo = (struct vmbus_channel_msginfo *)curr; |
636 | requestheader = | |
c50f7fb2 | 637 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 638 | |
c50f7fb2 | 639 | if (requestheader->msgtype == CHANNELMSG_GPADL_HEADER) { |
188963ec HZ |
640 | gpadlheader = |
641 | (struct vmbus_channel_gpadl_header *)requestheader; | |
642 | ||
c50f7fb2 HZ |
643 | if ((gpadlcreated->child_relid == |
644 | gpadlheader->child_relid) && | |
645 | (gpadlcreated->gpadl == gpadlheader->gpadl)) { | |
646 | memcpy(&msginfo->response.gpadl_created, | |
188963ec | 647 | gpadlcreated, |
bd60c33e | 648 | sizeof(struct vmbus_channel_gpadl_created)); |
0c3b7b2f S |
649 | msginfo->wait_condition = 1; |
650 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
651 | break; |
652 | } | |
653 | } | |
654 | } | |
15b2f647 | 655 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
656 | } |
657 | ||
3e189519 | 658 | /* |
e98cb276 | 659 | * vmbus_ongpadl_torndown - GPADL torndown handler. |
bd60c33e GKH |
660 | * |
661 | * This is invoked when we received a response to our gpadl teardown request. | |
662 | * Find the matching request, copy the response and signal the requesting | |
663 | * thread. | |
664 | */ | |
e98cb276 | 665 | static void vmbus_ongpadl_torndown( |
bd60c33e | 666 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 667 | { |
188963ec | 668 | struct vmbus_channel_gpadl_torndown *gpadl_torndown; |
53af545b | 669 | struct list_head *curr; |
188963ec HZ |
670 | struct vmbus_channel_msginfo *msginfo; |
671 | struct vmbus_channel_message_header *requestheader; | |
672 | struct vmbus_channel_gpadl_teardown *gpadl_teardown; | |
dd0813b6 | 673 | unsigned long flags; |
3e7ee490 | 674 | |
188963ec | 675 | gpadl_torndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
bd60c33e GKH |
676 | |
677 | /* | |
678 | * Find the open msg, copy the result and signal/unblock the wait event | |
679 | */ | |
15b2f647 | 680 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 681 | |
da9fcb72 | 682 | list_for_each(curr, &vmbus_connection.chn_msg_list) { |
53af545b | 683 | /* FIXME: this should probably use list_entry() instead */ |
188963ec HZ |
684 | msginfo = (struct vmbus_channel_msginfo *)curr; |
685 | requestheader = | |
c50f7fb2 | 686 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 687 | |
c50f7fb2 | 688 | if (requestheader->msgtype == CHANNELMSG_GPADL_TEARDOWN) { |
188963ec HZ |
689 | gpadl_teardown = |
690 | (struct vmbus_channel_gpadl_teardown *)requestheader; | |
3e7ee490 | 691 | |
c50f7fb2 HZ |
692 | if (gpadl_torndown->gpadl == gpadl_teardown->gpadl) { |
693 | memcpy(&msginfo->response.gpadl_torndown, | |
188963ec | 694 | gpadl_torndown, |
bd60c33e | 695 | sizeof(struct vmbus_channel_gpadl_torndown)); |
0c3b7b2f S |
696 | msginfo->wait_condition = 1; |
697 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
698 | break; |
699 | } | |
700 | } | |
701 | } | |
15b2f647 | 702 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
703 | } |
704 | ||
3e189519 | 705 | /* |
e98cb276 | 706 | * vmbus_onversion_response - Version response handler |
bd60c33e GKH |
707 | * |
708 | * This is invoked when we received a response to our initiate contact request. | |
709 | * Find the matching request, copy the response and signal the requesting | |
710 | * thread. | |
711 | */ | |
e98cb276 | 712 | static void vmbus_onversion_response( |
bd60c33e | 713 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 714 | { |
53af545b | 715 | struct list_head *curr; |
188963ec HZ |
716 | struct vmbus_channel_msginfo *msginfo; |
717 | struct vmbus_channel_message_header *requestheader; | |
82250213 | 718 | struct vmbus_channel_initiate_contact *initiate; |
188963ec | 719 | struct vmbus_channel_version_response *version_response; |
dd0813b6 | 720 | unsigned long flags; |
3e7ee490 | 721 | |
188963ec | 722 | version_response = (struct vmbus_channel_version_response *)hdr; |
15b2f647 | 723 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 | 724 | |
da9fcb72 | 725 | list_for_each(curr, &vmbus_connection.chn_msg_list) { |
53af545b | 726 | /* FIXME: this should probably use list_entry() instead */ |
188963ec HZ |
727 | msginfo = (struct vmbus_channel_msginfo *)curr; |
728 | requestheader = | |
c50f7fb2 | 729 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 730 | |
c50f7fb2 HZ |
731 | if (requestheader->msgtype == |
732 | CHANNELMSG_INITIATE_CONTACT) { | |
188963ec HZ |
733 | initiate = |
734 | (struct vmbus_channel_initiate_contact *)requestheader; | |
c50f7fb2 | 735 | memcpy(&msginfo->response.version_response, |
188963ec | 736 | version_response, |
bd60c33e | 737 | sizeof(struct vmbus_channel_version_response)); |
0c3b7b2f S |
738 | msginfo->wait_condition = 1; |
739 | wake_up(&msginfo->waitevent); | |
3e7ee490 HJ |
740 | } |
741 | } | |
15b2f647 | 742 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
3e7ee490 HJ |
743 | } |
744 | ||
c8212f04 GKH |
745 | /* Channel message dispatch table */ |
746 | static struct vmbus_channel_message_table_entry | |
c50f7fb2 HZ |
747 | gChannelMessageTable[CHANNELMSG_COUNT] = { |
748 | {CHANNELMSG_INVALID, NULL}, | |
749 | {CHANNELMSG_OFFERCHANNEL, vmbus_onoffer}, | |
750 | {CHANNELMSG_RESCIND_CHANNELOFFER, vmbus_onoffer_rescind}, | |
751 | {CHANNELMSG_REQUESTOFFERS, NULL}, | |
752 | {CHANNELMSG_ALLOFFERS_DELIVERED, vmbus_onoffers_delivered}, | |
753 | {CHANNELMSG_OPENCHANNEL, NULL}, | |
754 | {CHANNELMSG_OPENCHANNEL_RESULT, vmbus_onopen_result}, | |
755 | {CHANNELMSG_CLOSECHANNEL, NULL}, | |
756 | {CHANNELMSG_GPADL_HEADER, NULL}, | |
757 | {CHANNELMSG_GPADL_BODY, NULL}, | |
758 | {CHANNELMSG_GPADL_CREATED, vmbus_ongpadl_created}, | |
759 | {CHANNELMSG_GPADL_TEARDOWN, NULL}, | |
760 | {CHANNELMSG_GPADL_TORNDOWN, vmbus_ongpadl_torndown}, | |
761 | {CHANNELMSG_RELID_RELEASED, NULL}, | |
762 | {CHANNELMSG_INITIATE_CONTACT, NULL}, | |
763 | {CHANNELMSG_VERSION_RESPONSE, vmbus_onversion_response}, | |
764 | {CHANNELMSG_UNLOAD, NULL}, | |
c8212f04 GKH |
765 | }; |
766 | ||
3e189519 | 767 | /* |
e98cb276 | 768 | * vmbus_onmessage - Handler for channel protocol messages. |
bd60c33e GKH |
769 | * |
770 | * This is invoked in the vmbus worker thread context. | |
771 | */ | |
e98cb276 | 772 | void vmbus_onmessage(void *context) |
3e7ee490 | 773 | { |
188963ec | 774 | struct hv_message *msg = context; |
82250213 | 775 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
776 | int size; |
777 | ||
f6feebe0 HZ |
778 | hdr = (struct vmbus_channel_message_header *)msg->u.payload; |
779 | size = msg->header.payload_size; | |
3e7ee490 | 780 | |
c50f7fb2 | 781 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->msgtype, size); |
3e7ee490 | 782 | |
c50f7fb2 | 783 | if (hdr->msgtype >= CHANNELMSG_COUNT) { |
bd60c33e GKH |
784 | DPRINT_ERR(VMBUS, |
785 | "Received invalid channel message type %d size %d", | |
c50f7fb2 | 786 | hdr->msgtype, size); |
04f50c4d | 787 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
f6feebe0 | 788 | (unsigned char *)msg->u.payload, size); |
3e7ee490 HJ |
789 | return; |
790 | } | |
791 | ||
c50f7fb2 HZ |
792 | if (gChannelMessageTable[hdr->msgtype].messageHandler) |
793 | gChannelMessageTable[hdr->msgtype].messageHandler(hdr); | |
3e7ee490 | 794 | else |
bd60c33e | 795 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", |
c50f7fb2 | 796 | hdr->msgtype); |
3e7ee490 HJ |
797 | } |
798 | ||
3e189519 | 799 | /* |
e98cb276 | 800 | * vmbus_request_offers - Send a request to get all our pending offers. |
bd60c33e | 801 | */ |
e98cb276 | 802 | int vmbus_request_offers(void) |
3e7ee490 | 803 | { |
82250213 | 804 | struct vmbus_channel_message_header *msg; |
188963ec | 805 | struct vmbus_channel_msginfo *msginfo; |
bd60c33e | 806 | int ret; |
3e7ee490 | 807 | |
188963ec | 808 | msginfo = kmalloc(sizeof(*msginfo) + |
bd60c33e GKH |
809 | sizeof(struct vmbus_channel_message_header), |
810 | GFP_KERNEL); | |
188963ec | 811 | if (!msginfo) |
75910f23 | 812 | return -ENOMEM; |
3e7ee490 | 813 | |
0c3b7b2f | 814 | init_waitqueue_head(&msginfo->waitevent); |
75910f23 | 815 | |
c50f7fb2 | 816 | msg = (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 817 | |
c50f7fb2 | 818 | msg->msgtype = CHANNELMSG_REQUESTOFFERS; |
3e7ee490 | 819 | |
3e7ee490 | 820 | |
c6977677 | 821 | ret = vmbus_post_msg(msg, |
bd60c33e GKH |
822 | sizeof(struct vmbus_channel_message_header)); |
823 | if (ret != 0) { | |
3e7ee490 HJ |
824 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); |
825 | ||
0c3b7b2f S |
826 | goto cleanup; |
827 | } | |
3e7ee490 | 828 | |
0c3b7b2f S |
829 | msginfo->wait_condition = 0; |
830 | wait_event_timeout(msginfo->waitevent, msginfo->wait_condition, | |
831 | msecs_to_jiffies(1000)); | |
832 | if (msginfo->wait_condition == 0) { | |
833 | ret = -ETIMEDOUT; | |
834 | goto cleanup; | |
3e7ee490 | 835 | } |
3e7ee490 | 836 | |
3e7ee490 HJ |
837 | |
838 | ||
0c3b7b2f S |
839 | cleanup: |
840 | if (msginfo) | |
188963ec | 841 | kfree(msginfo); |
3e7ee490 | 842 | |
3e7ee490 HJ |
843 | return ret; |
844 | } | |
845 | ||
3e189519 | 846 | /* |
e98cb276 | 847 | * vmbus_release_unattached_channels - Release channels that are |
3e189519 | 848 | * unattached/unconnected ie (no drivers associated) |
bd60c33e | 849 | */ |
e98cb276 | 850 | void vmbus_release_unattached_channels(void) |
3e7ee490 | 851 | { |
53af545b | 852 | struct vmbus_channel *channel, *pos; |
aded7165 | 853 | struct vmbus_channel *start = NULL; |
0f5e44ca | 854 | unsigned long flags; |
3e7ee490 | 855 | |
15b2f647 | 856 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
3e7ee490 | 857 | |
da9fcb72 | 858 | list_for_each_entry_safe(channel, pos, &vmbus_connection.chn_list, |
c50f7fb2 | 859 | listentry) { |
3e7ee490 HJ |
860 | if (channel == start) |
861 | break; | |
862 | ||
ca623ad3 | 863 | if (!channel->device_obj->drv) { |
c50f7fb2 | 864 | list_del(&channel->listentry); |
bd60c33e GKH |
865 | DPRINT_INFO(VMBUS, |
866 | "Releasing unattached device object %p", | |
c50f7fb2 | 867 | channel->device_obj); |
3e7ee490 | 868 | |
9d8bd71a | 869 | vmbus_child_device_unregister(channel->device_obj); |
e98cb276 | 870 | free_channel(channel); |
bd60c33e | 871 | } else { |
3e7ee490 | 872 | if (!start) |
3e7ee490 | 873 | start = channel; |
3e7ee490 HJ |
874 | } |
875 | } | |
876 | ||
15b2f647 | 877 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
3e7ee490 HJ |
878 | } |
879 | ||
454f18a9 | 880 | /* eof */ |