Commit | Line | Data |
---|---|---|
3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
a0086dc5 GKH |
21 | #include <linux/kernel.h> |
22 | #include <linux/mm.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
53af545b | 24 | #include <linux/list.h> |
c88c4e4c | 25 | #include <linux/module.h> |
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 | */ |
e98cb276 | 266 | static inline void release_channel(void *context) |
3e7ee490 | 267 | { |
bd60c33e | 268 | struct vmbus_channel *channel = context; |
3e7ee490 | 269 | |
3e7ee490 | 270 | DPRINT_DBG(VMBUS, "releasing channel (%p)", channel); |
c50f7fb2 | 271 | destroy_workqueue(channel->controlwq); |
3e7ee490 HJ |
272 | DPRINT_DBG(VMBUS, "channel released (%p)", channel); |
273 | ||
8c69f52a | 274 | kfree(channel); |
3e7ee490 HJ |
275 | } |
276 | ||
3e189519 | 277 | /* |
e98cb276 | 278 | * free_channel - Release the resources used by the vmbus channel object |
bd60c33e | 279 | */ |
e98cb276 | 280 | void free_channel(struct vmbus_channel *channel) |
3e7ee490 | 281 | { |
188963ec | 282 | del_timer_sync(&channel->poll_timer); |
3e7ee490 | 283 | |
bd60c33e GKH |
284 | /* |
285 | * We have to release the channel's workqueue/thread in the vmbus's | |
286 | * workqueue/thread context | |
287 | * ie we can't destroy ourselves. | |
288 | */ | |
e98cb276 | 289 | osd_schedule_callback(gVmbusConnection.WorkQueue, release_channel, |
188963ec | 290 | channel); |
3e7ee490 HJ |
291 | } |
292 | ||
8b5d6d3b HZ |
293 | |
294 | DECLARE_COMPLETION(hv_channel_ready); | |
295 | ||
296 | /* | |
297 | * Count initialized channels, and ensure all channels are ready when hv_vmbus | |
298 | * module loading completes. | |
299 | */ | |
300 | static void count_hv_channel(void) | |
301 | { | |
302 | static int counter; | |
303 | unsigned long flags; | |
304 | ||
305 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); | |
306 | if (++counter == MAX_MSG_TYPES) | |
307 | complete(&hv_channel_ready); | |
308 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); | |
309 | } | |
310 | ||
311 | ||
3e189519 | 312 | /* |
e98cb276 | 313 | * vmbus_process_offer - Process the offer by creating a channel/device |
c88c4e4c | 314 | * associated with this offer |
bd60c33e | 315 | */ |
e98cb276 | 316 | static void vmbus_process_offer(void *context) |
3e7ee490 | 317 | { |
188963ec | 318 | struct vmbus_channel *newchannel = context; |
aded7165 | 319 | struct vmbus_channel *channel; |
188963ec | 320 | bool fnew = true; |
bd60c33e | 321 | int ret; |
c88c4e4c | 322 | int cnt; |
0f5e44ca | 323 | unsigned long flags; |
3e7ee490 | 324 | |
454f18a9 | 325 | /* Make sure this is a new offer */ |
0f5e44ca | 326 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 327 | |
c50f7fb2 HZ |
328 | list_for_each_entry(channel, &gVmbusConnection.ChannelList, listentry) { |
329 | if (!memcmp(&channel->offermsg.offer.InterfaceType, | |
330 | &newchannel->offermsg.offer.InterfaceType, | |
bd60c33e | 331 | sizeof(struct hv_guid)) && |
c50f7fb2 HZ |
332 | !memcmp(&channel->offermsg.offer.InterfaceInstance, |
333 | &newchannel->offermsg.offer.InterfaceInstance, | |
bd60c33e | 334 | sizeof(struct hv_guid))) { |
188963ec | 335 | fnew = false; |
3e7ee490 HJ |
336 | break; |
337 | } | |
338 | } | |
339 | ||
188963ec | 340 | if (fnew) |
c50f7fb2 | 341 | list_add_tail(&newchannel->listentry, |
53af545b | 342 | &gVmbusConnection.ChannelList); |
bd60c33e | 343 | |
0f5e44ca | 344 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 345 | |
188963ec | 346 | if (!fnew) { |
bd60c33e | 347 | DPRINT_DBG(VMBUS, "Ignoring duplicate offer for relid (%d)", |
c50f7fb2 | 348 | newchannel->offermsg.child_relid); |
e98cb276 | 349 | free_channel(newchannel); |
3e7ee490 HJ |
350 | return; |
351 | } | |
352 | ||
bd60c33e GKH |
353 | /* |
354 | * Start the process of binding this offer to the driver | |
355 | * We need to set the DeviceObject field before calling | |
356 | * VmbusChildDeviceAdd() | |
357 | */ | |
c50f7fb2 HZ |
358 | newchannel->device_obj = VmbusChildDeviceCreate( |
359 | &newchannel->offermsg.offer.InterfaceType, | |
360 | &newchannel->offermsg.offer.InterfaceInstance, | |
188963ec | 361 | newchannel); |
3e7ee490 | 362 | |
bd60c33e | 363 | DPRINT_DBG(VMBUS, "child device object allocated - %p", |
c50f7fb2 | 364 | newchannel->device_obj); |
3e7ee490 | 365 | |
454f18a9 BP |
366 | /* |
367 | * Add the new device to the bus. This will kick off device-driver | |
368 | * binding which eventually invokes the device driver's AddDevice() | |
369 | * method. | |
370 | */ | |
c50f7fb2 | 371 | ret = VmbusChildDeviceAdd(newchannel->device_obj); |
bd60c33e GKH |
372 | if (ret != 0) { |
373 | DPRINT_ERR(VMBUS, | |
374 | "unable to add child device object (relid %d)", | |
c50f7fb2 | 375 | newchannel->offermsg.child_relid); |
3e7ee490 | 376 | |
0f5e44ca | 377 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
c50f7fb2 | 378 | list_del(&newchannel->listentry); |
0f5e44ca | 379 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 380 | |
e98cb276 | 381 | free_channel(newchannel); |
bd60c33e | 382 | } else { |
454f18a9 BP |
383 | /* |
384 | * This state is used to indicate a successful open | |
385 | * so that when we do close the channel normally, we | |
386 | * can cleanup properly | |
387 | */ | |
c50f7fb2 | 388 | newchannel->state = CHANNEL_OPEN_STATE; |
c88c4e4c | 389 | |
8b5d6d3b HZ |
390 | /* Open IC channels */ |
391 | for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) { | |
c50f7fb2 | 392 | if (memcmp(&newchannel->offermsg.offer.InterfaceType, |
c88c4e4c | 393 | &hv_cb_utils[cnt].data, |
8b5d6d3b | 394 | sizeof(struct hv_guid)) == 0 && |
188963ec | 395 | vmbus_open(newchannel, 2 * PAGE_SIZE, |
8b5d6d3b HZ |
396 | 2 * PAGE_SIZE, NULL, 0, |
397 | hv_cb_utils[cnt].callback, | |
188963ec HZ |
398 | newchannel) == 0) { |
399 | hv_cb_utils[cnt].channel = newchannel; | |
c88c4e4c | 400 | DPRINT_INFO(VMBUS, "%s", |
8b5d6d3b HZ |
401 | hv_cb_utils[cnt].log_msg); |
402 | count_hv_channel(); | |
c88c4e4c | 403 | } |
c88c4e4c | 404 | } |
3e7ee490 | 405 | } |
3e7ee490 HJ |
406 | } |
407 | ||
3e189519 | 408 | /* |
e98cb276 HZ |
409 | * vmbus_process_rescind_offer - |
410 | * Rescind the offer by initiating a device removal | |
bd60c33e | 411 | */ |
e98cb276 | 412 | static void vmbus_process_rescind_offer(void *context) |
3e7ee490 | 413 | { |
aded7165 | 414 | struct vmbus_channel *channel = context; |
3e7ee490 | 415 | |
c50f7fb2 | 416 | VmbusChildDeviceRemove(channel->device_obj); |
3e7ee490 HJ |
417 | } |
418 | ||
3e189519 | 419 | /* |
e98cb276 | 420 | * vmbus_onoffer - Handler for channel offers from vmbus in parent partition. |
bd60c33e GKH |
421 | * |
422 | * We ignore all offers except network and storage offers. For each network and | |
423 | * storage offers, we create a channel object and queue a work item to the | |
424 | * channel object to process the offer synchronously | |
425 | */ | |
e98cb276 | 426 | static void vmbus_onoffer(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 427 | { |
bd60c33e | 428 | struct vmbus_channel_offer_channel *offer; |
188963ec HZ |
429 | struct vmbus_channel *newchannel; |
430 | struct hv_guid *guidtype; | |
431 | struct hv_guid *guidinstance; | |
3e7ee490 | 432 | int i; |
188963ec | 433 | int fsupported = 0; |
3e7ee490 | 434 | |
bd60c33e GKH |
435 | offer = (struct vmbus_channel_offer_channel *)hdr; |
436 | for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) { | |
c50f7fb2 | 437 | if (memcmp(&offer->offer.InterfaceType, |
bd60c33e | 438 | &gSupportedDeviceClasses[i], sizeof(struct hv_guid)) == 0) { |
188963ec | 439 | fsupported = 1; |
3e7ee490 HJ |
440 | break; |
441 | } | |
442 | } | |
443 | ||
188963ec | 444 | if (!fsupported) { |
bd60c33e | 445 | DPRINT_DBG(VMBUS, "Ignoring channel offer notification for " |
c50f7fb2 | 446 | "child relid %d", offer->child_relid); |
3e7ee490 HJ |
447 | return; |
448 | } | |
449 | ||
c50f7fb2 HZ |
450 | guidtype = &offer->offer.InterfaceType; |
451 | guidinstance = &offer->offer.InterfaceInstance; | |
3e7ee490 | 452 | |
bd60c33e GKH |
453 | DPRINT_INFO(VMBUS, "Channel offer notification - " |
454 | "child relid %d monitor id %d allocated %d, " | |
455 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
456 | "%02x%02x%02x%02x%02x%02x%02x%02x} " | |
457 | "instance {%02x%02x%02x%02x-%02x%02x-%02x%02x-" | |
458 | "%02x%02x%02x%02x%02x%02x%02x%02x}", | |
c50f7fb2 HZ |
459 | offer->child_relid, offer->monitorid, |
460 | offer->monitor_allocated, | |
188963ec HZ |
461 | guidtype->data[3], guidtype->data[2], |
462 | guidtype->data[1], guidtype->data[0], | |
463 | guidtype->data[5], guidtype->data[4], | |
464 | guidtype->data[7], guidtype->data[6], | |
465 | guidtype->data[8], guidtype->data[9], | |
466 | guidtype->data[10], guidtype->data[11], | |
467 | guidtype->data[12], guidtype->data[13], | |
468 | guidtype->data[14], guidtype->data[15], | |
469 | guidinstance->data[3], guidinstance->data[2], | |
470 | guidinstance->data[1], guidinstance->data[0], | |
471 | guidinstance->data[5], guidinstance->data[4], | |
472 | guidinstance->data[7], guidinstance->data[6], | |
473 | guidinstance->data[8], guidinstance->data[9], | |
474 | guidinstance->data[10], guidinstance->data[11], | |
475 | guidinstance->data[12], guidinstance->data[13], | |
476 | guidinstance->data[14], guidinstance->data[15]); | |
3e7ee490 | 477 | |
454f18a9 | 478 | /* Allocate the channel object and save this offer. */ |
e98cb276 | 479 | newchannel = alloc_channel(); |
188963ec | 480 | if (!newchannel) { |
3e7ee490 HJ |
481 | DPRINT_ERR(VMBUS, "unable to allocate channel object"); |
482 | return; | |
483 | } | |
484 | ||
188963ec | 485 | DPRINT_DBG(VMBUS, "channel object allocated - %p", newchannel); |
3e7ee490 | 486 | |
c50f7fb2 | 487 | memcpy(&newchannel->offermsg, offer, |
bd60c33e | 488 | sizeof(struct vmbus_channel_offer_channel)); |
c50f7fb2 HZ |
489 | newchannel->monitor_grp = (u8)offer->monitorid / 32; |
490 | newchannel->monitor_bit = (u8)offer->monitorid % 32; | |
3e7ee490 | 491 | |
454f18a9 | 492 | /* TODO: Make sure the offer comes from our parent partition */ |
c50f7fb2 | 493 | osd_schedule_callback(newchannel->controlwq, vmbus_process_offer, |
188963ec | 494 | newchannel); |
3e7ee490 HJ |
495 | } |
496 | ||
3e189519 | 497 | /* |
e98cb276 | 498 | * vmbus_onoffer_rescind - Rescind offer handler. |
bd60c33e GKH |
499 | * |
500 | * We queue a work item to process this offer synchronously | |
501 | */ | |
e98cb276 | 502 | static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 503 | { |
bd60c33e | 504 | struct vmbus_channel_rescind_offer *rescind; |
aded7165 | 505 | struct vmbus_channel *channel; |
3e7ee490 | 506 | |
bd60c33e | 507 | rescind = (struct vmbus_channel_rescind_offer *)hdr; |
c50f7fb2 | 508 | channel = GetChannelFromRelId(rescind->child_relid); |
bd60c33e GKH |
509 | if (channel == NULL) { |
510 | DPRINT_DBG(VMBUS, "channel not found for relId %d", | |
c50f7fb2 | 511 | rescind->child_relid); |
3e7ee490 HJ |
512 | return; |
513 | } | |
514 | ||
c50f7fb2 | 515 | osd_schedule_callback(channel->controlwq, |
e98cb276 | 516 | vmbus_process_rescind_offer, |
de65a384 | 517 | channel); |
3e7ee490 HJ |
518 | } |
519 | ||
3e189519 | 520 | /* |
e98cb276 HZ |
521 | * vmbus_onoffers_delivered - |
522 | * This is invoked when all offers have been delivered. | |
bd60c33e GKH |
523 | * |
524 | * Nothing to do here. | |
525 | */ | |
e98cb276 | 526 | static void vmbus_onoffers_delivered( |
bd60c33e | 527 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 528 | { |
3e7ee490 HJ |
529 | } |
530 | ||
3e189519 | 531 | /* |
e98cb276 | 532 | * vmbus_onopen_result - Open result handler. |
bd60c33e GKH |
533 | * |
534 | * This is invoked when we received a response to our channel open request. | |
535 | * Find the matching request, copy the response and signal the requesting | |
536 | * thread. | |
537 | */ | |
e98cb276 | 538 | static void vmbus_onopen_result(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 539 | { |
bd60c33e | 540 | struct vmbus_channel_open_result *result; |
53af545b | 541 | struct list_head *curr; |
188963ec HZ |
542 | struct vmbus_channel_msginfo *msginfo; |
543 | struct vmbus_channel_message_header *requestheader; | |
544 | struct vmbus_channel_open_channel *openmsg; | |
dd0813b6 | 545 | unsigned long flags; |
3e7ee490 | 546 | |
bd60c33e | 547 | result = (struct vmbus_channel_open_result *)hdr; |
c50f7fb2 | 548 | DPRINT_DBG(VMBUS, "vmbus open result - %d", result->status); |
3e7ee490 | 549 | |
bd60c33e GKH |
550 | /* |
551 | * Find the open msg, copy the result and signal/unblock the wait event | |
552 | */ | |
dd0813b6 | 553 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 554 | |
53af545b BP |
555 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
556 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
557 | msginfo = (struct vmbus_channel_msginfo *)curr; |
558 | requestheader = | |
c50f7fb2 | 559 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 560 | |
c50f7fb2 | 561 | if (requestheader->msgtype == CHANNELMSG_OPENCHANNEL) { |
188963ec | 562 | openmsg = |
c50f7fb2 HZ |
563 | (struct vmbus_channel_open_channel *)msginfo->msg; |
564 | if (openmsg->child_relid == result->child_relid && | |
565 | openmsg->openid == result->openid) { | |
566 | memcpy(&msginfo->response.open_result, | |
bd60c33e GKH |
567 | result, |
568 | sizeof(struct vmbus_channel_open_result)); | |
203df82d | 569 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
570 | break; |
571 | } | |
572 | } | |
573 | } | |
dd0813b6 | 574 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
575 | } |
576 | ||
3e189519 | 577 | /* |
e98cb276 | 578 | * vmbus_ongpadl_created - GPADL created handler. |
bd60c33e GKH |
579 | * |
580 | * This is invoked when we received a response to our gpadl create request. | |
581 | * Find the matching request, copy the response and signal the requesting | |
582 | * thread. | |
583 | */ | |
e98cb276 | 584 | static void vmbus_ongpadl_created(struct vmbus_channel_message_header *hdr) |
3e7ee490 | 585 | { |
188963ec | 586 | struct vmbus_channel_gpadl_created *gpadlcreated; |
53af545b | 587 | struct list_head *curr; |
188963ec HZ |
588 | struct vmbus_channel_msginfo *msginfo; |
589 | struct vmbus_channel_message_header *requestheader; | |
590 | struct vmbus_channel_gpadl_header *gpadlheader; | |
dd0813b6 | 591 | unsigned long flags; |
3e7ee490 | 592 | |
188963ec | 593 | gpadlcreated = (struct vmbus_channel_gpadl_created *)hdr; |
bd60c33e | 594 | DPRINT_DBG(VMBUS, "vmbus gpadl created result - %d", |
c50f7fb2 | 595 | gpadlcreated->creation_status); |
3e7ee490 | 596 | |
bd60c33e GKH |
597 | /* |
598 | * Find the establish msg, copy the result and signal/unblock the wait | |
599 | * event | |
600 | */ | |
dd0813b6 | 601 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 602 | |
53af545b BP |
603 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
604 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
605 | msginfo = (struct vmbus_channel_msginfo *)curr; |
606 | requestheader = | |
c50f7fb2 | 607 | (struct vmbus_channel_message_header *)msginfo->msg; |
188963ec | 608 | |
c50f7fb2 | 609 | if (requestheader->msgtype == CHANNELMSG_GPADL_HEADER) { |
188963ec HZ |
610 | gpadlheader = |
611 | (struct vmbus_channel_gpadl_header *)requestheader; | |
612 | ||
c50f7fb2 HZ |
613 | if ((gpadlcreated->child_relid == |
614 | gpadlheader->child_relid) && | |
615 | (gpadlcreated->gpadl == gpadlheader->gpadl)) { | |
616 | memcpy(&msginfo->response.gpadl_created, | |
188963ec | 617 | gpadlcreated, |
bd60c33e | 618 | sizeof(struct vmbus_channel_gpadl_created)); |
203df82d | 619 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
620 | break; |
621 | } | |
622 | } | |
623 | } | |
dd0813b6 | 624 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
625 | } |
626 | ||
3e189519 | 627 | /* |
e98cb276 | 628 | * vmbus_ongpadl_torndown - GPADL torndown handler. |
bd60c33e GKH |
629 | * |
630 | * This is invoked when we received a response to our gpadl teardown request. | |
631 | * Find the matching request, copy the response and signal the requesting | |
632 | * thread. | |
633 | */ | |
e98cb276 | 634 | static void vmbus_ongpadl_torndown( |
bd60c33e | 635 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 636 | { |
188963ec | 637 | struct vmbus_channel_gpadl_torndown *gpadl_torndown; |
53af545b | 638 | struct list_head *curr; |
188963ec HZ |
639 | struct vmbus_channel_msginfo *msginfo; |
640 | struct vmbus_channel_message_header *requestheader; | |
641 | struct vmbus_channel_gpadl_teardown *gpadl_teardown; | |
dd0813b6 | 642 | unsigned long flags; |
3e7ee490 | 643 | |
188963ec | 644 | gpadl_torndown = (struct vmbus_channel_gpadl_torndown *)hdr; |
bd60c33e GKH |
645 | |
646 | /* | |
647 | * Find the open msg, copy the result and signal/unblock the wait event | |
648 | */ | |
dd0813b6 | 649 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 650 | |
53af545b BP |
651 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
652 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
653 | msginfo = (struct vmbus_channel_msginfo *)curr; |
654 | requestheader = | |
c50f7fb2 | 655 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 656 | |
c50f7fb2 | 657 | if (requestheader->msgtype == CHANNELMSG_GPADL_TEARDOWN) { |
188963ec HZ |
658 | gpadl_teardown = |
659 | (struct vmbus_channel_gpadl_teardown *)requestheader; | |
3e7ee490 | 660 | |
c50f7fb2 HZ |
661 | if (gpadl_torndown->gpadl == gpadl_teardown->gpadl) { |
662 | memcpy(&msginfo->response.gpadl_torndown, | |
188963ec | 663 | gpadl_torndown, |
bd60c33e | 664 | sizeof(struct vmbus_channel_gpadl_torndown)); |
203df82d | 665 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
666 | break; |
667 | } | |
668 | } | |
669 | } | |
dd0813b6 | 670 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
671 | } |
672 | ||
3e189519 | 673 | /* |
e98cb276 | 674 | * vmbus_onversion_response - Version response handler |
bd60c33e GKH |
675 | * |
676 | * This is invoked when we received a response to our initiate contact request. | |
677 | * Find the matching request, copy the response and signal the requesting | |
678 | * thread. | |
679 | */ | |
e98cb276 | 680 | static void vmbus_onversion_response( |
bd60c33e | 681 | struct vmbus_channel_message_header *hdr) |
3e7ee490 | 682 | { |
53af545b | 683 | struct list_head *curr; |
188963ec HZ |
684 | struct vmbus_channel_msginfo *msginfo; |
685 | struct vmbus_channel_message_header *requestheader; | |
82250213 | 686 | struct vmbus_channel_initiate_contact *initiate; |
188963ec | 687 | struct vmbus_channel_version_response *version_response; |
dd0813b6 | 688 | unsigned long flags; |
3e7ee490 | 689 | |
188963ec | 690 | version_response = (struct vmbus_channel_version_response *)hdr; |
dd0813b6 | 691 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 692 | |
53af545b BP |
693 | list_for_each(curr, &gVmbusConnection.ChannelMsgList) { |
694 | /* FIXME: this should probably use list_entry() instead */ | |
188963ec HZ |
695 | msginfo = (struct vmbus_channel_msginfo *)curr; |
696 | requestheader = | |
c50f7fb2 | 697 | (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 698 | |
c50f7fb2 HZ |
699 | if (requestheader->msgtype == |
700 | CHANNELMSG_INITIATE_CONTACT) { | |
188963ec HZ |
701 | initiate = |
702 | (struct vmbus_channel_initiate_contact *)requestheader; | |
c50f7fb2 | 703 | memcpy(&msginfo->response.version_response, |
188963ec | 704 | version_response, |
bd60c33e | 705 | sizeof(struct vmbus_channel_version_response)); |
203df82d | 706 | osd_waitevent_set(msginfo->waitevent); |
3e7ee490 HJ |
707 | } |
708 | } | |
dd0813b6 | 709 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
710 | } |
711 | ||
c8212f04 GKH |
712 | /* Channel message dispatch table */ |
713 | static struct vmbus_channel_message_table_entry | |
c50f7fb2 HZ |
714 | gChannelMessageTable[CHANNELMSG_COUNT] = { |
715 | {CHANNELMSG_INVALID, NULL}, | |
716 | {CHANNELMSG_OFFERCHANNEL, vmbus_onoffer}, | |
717 | {CHANNELMSG_RESCIND_CHANNELOFFER, vmbus_onoffer_rescind}, | |
718 | {CHANNELMSG_REQUESTOFFERS, NULL}, | |
719 | {CHANNELMSG_ALLOFFERS_DELIVERED, vmbus_onoffers_delivered}, | |
720 | {CHANNELMSG_OPENCHANNEL, NULL}, | |
721 | {CHANNELMSG_OPENCHANNEL_RESULT, vmbus_onopen_result}, | |
722 | {CHANNELMSG_CLOSECHANNEL, NULL}, | |
723 | {CHANNELMSG_GPADL_HEADER, NULL}, | |
724 | {CHANNELMSG_GPADL_BODY, NULL}, | |
725 | {CHANNELMSG_GPADL_CREATED, vmbus_ongpadl_created}, | |
726 | {CHANNELMSG_GPADL_TEARDOWN, NULL}, | |
727 | {CHANNELMSG_GPADL_TORNDOWN, vmbus_ongpadl_torndown}, | |
728 | {CHANNELMSG_RELID_RELEASED, NULL}, | |
729 | {CHANNELMSG_INITIATE_CONTACT, NULL}, | |
730 | {CHANNELMSG_VERSION_RESPONSE, vmbus_onversion_response}, | |
731 | {CHANNELMSG_UNLOAD, NULL}, | |
c8212f04 GKH |
732 | }; |
733 | ||
3e189519 | 734 | /* |
e98cb276 | 735 | * vmbus_onmessage - Handler for channel protocol messages. |
bd60c33e GKH |
736 | * |
737 | * This is invoked in the vmbus worker thread context. | |
738 | */ | |
e98cb276 | 739 | void vmbus_onmessage(void *context) |
3e7ee490 | 740 | { |
188963ec | 741 | struct hv_message *msg = context; |
82250213 | 742 | struct vmbus_channel_message_header *hdr; |
3e7ee490 HJ |
743 | int size; |
744 | ||
f6feebe0 HZ |
745 | hdr = (struct vmbus_channel_message_header *)msg->u.payload; |
746 | size = msg->header.payload_size; | |
3e7ee490 | 747 | |
c50f7fb2 | 748 | DPRINT_DBG(VMBUS, "message type %d size %d", hdr->msgtype, size); |
3e7ee490 | 749 | |
c50f7fb2 | 750 | if (hdr->msgtype >= CHANNELMSG_COUNT) { |
bd60c33e GKH |
751 | DPRINT_ERR(VMBUS, |
752 | "Received invalid channel message type %d size %d", | |
c50f7fb2 | 753 | hdr->msgtype, size); |
04f50c4d | 754 | print_hex_dump_bytes("", DUMP_PREFIX_NONE, |
f6feebe0 | 755 | (unsigned char *)msg->u.payload, size); |
8c69f52a | 756 | kfree(msg); |
3e7ee490 HJ |
757 | return; |
758 | } | |
759 | ||
c50f7fb2 HZ |
760 | if (gChannelMessageTable[hdr->msgtype].messageHandler) |
761 | gChannelMessageTable[hdr->msgtype].messageHandler(hdr); | |
3e7ee490 | 762 | else |
bd60c33e | 763 | DPRINT_ERR(VMBUS, "Unhandled channel message type %d", |
c50f7fb2 | 764 | hdr->msgtype); |
3e7ee490 | 765 | |
454f18a9 | 766 | /* Free the msg that was allocated in VmbusOnMsgDPC() */ |
8c69f52a | 767 | kfree(msg); |
3e7ee490 HJ |
768 | } |
769 | ||
3e189519 | 770 | /* |
e98cb276 | 771 | * vmbus_request_offers - Send a request to get all our pending offers. |
bd60c33e | 772 | */ |
e98cb276 | 773 | int vmbus_request_offers(void) |
3e7ee490 | 774 | { |
82250213 | 775 | struct vmbus_channel_message_header *msg; |
188963ec | 776 | struct vmbus_channel_msginfo *msginfo; |
bd60c33e | 777 | int ret; |
3e7ee490 | 778 | |
188963ec | 779 | msginfo = kmalloc(sizeof(*msginfo) + |
bd60c33e GKH |
780 | sizeof(struct vmbus_channel_message_header), |
781 | GFP_KERNEL); | |
188963ec | 782 | if (!msginfo) |
75910f23 | 783 | return -ENOMEM; |
3e7ee490 | 784 | |
203df82d | 785 | msginfo->waitevent = osd_waitevent_create(); |
c50f7fb2 | 786 | if (!msginfo->waitevent) { |
188963ec | 787 | kfree(msginfo); |
75910f23 BP |
788 | return -ENOMEM; |
789 | } | |
790 | ||
c50f7fb2 | 791 | msg = (struct vmbus_channel_message_header *)msginfo->msg; |
3e7ee490 | 792 | |
c50f7fb2 | 793 | msg->msgtype = CHANNELMSG_REQUESTOFFERS; |
3e7ee490 HJ |
794 | |
795 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
bd60c33e GKH |
796 | INSERT_TAIL_LIST(&gVmbusConnection.channelMsgList, |
797 | &msgInfo->msgListEntry); | |
3e7ee490 HJ |
798 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ |
799 | ||
bd60c33e GKH |
800 | ret = VmbusPostMessage(msg, |
801 | sizeof(struct vmbus_channel_message_header)); | |
802 | if (ret != 0) { | |
3e7ee490 HJ |
803 | DPRINT_ERR(VMBUS, "Unable to request offers - %d", ret); |
804 | ||
805 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
806 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
807 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
808 | ||
809 | goto Cleanup; | |
810 | } | |
203df82d | 811 | /* osd_waitevent_wait(msgInfo->waitEvent); */ |
3e7ee490 HJ |
812 | |
813 | /*SpinlockAcquire(gVmbusConnection.channelMsgLock); | |
814 | REMOVE_ENTRY_LIST(&msgInfo->msgListEntry); | |
815 | SpinlockRelease(gVmbusConnection.channelMsgLock);*/ | |
816 | ||
817 | ||
818 | Cleanup: | |
188963ec | 819 | if (msginfo) { |
c50f7fb2 | 820 | kfree(msginfo->waitevent); |
188963ec | 821 | kfree(msginfo); |
3e7ee490 HJ |
822 | } |
823 | ||
3e7ee490 HJ |
824 | return ret; |
825 | } | |
826 | ||
3e189519 | 827 | /* |
e98cb276 | 828 | * vmbus_release_unattached_channels - Release channels that are |
3e189519 | 829 | * unattached/unconnected ie (no drivers associated) |
bd60c33e | 830 | */ |
e98cb276 | 831 | void vmbus_release_unattached_channels(void) |
3e7ee490 | 832 | { |
53af545b | 833 | struct vmbus_channel *channel, *pos; |
aded7165 | 834 | struct vmbus_channel *start = NULL; |
0f5e44ca | 835 | unsigned long flags; |
3e7ee490 | 836 | |
0f5e44ca | 837 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
3e7ee490 | 838 | |
53af545b | 839 | list_for_each_entry_safe(channel, pos, &gVmbusConnection.ChannelList, |
c50f7fb2 | 840 | listentry) { |
3e7ee490 HJ |
841 | if (channel == start) |
842 | break; | |
843 | ||
c50f7fb2 HZ |
844 | if (!channel->device_obj->Driver) { |
845 | list_del(&channel->listentry); | |
bd60c33e GKH |
846 | DPRINT_INFO(VMBUS, |
847 | "Releasing unattached device object %p", | |
c50f7fb2 | 848 | channel->device_obj); |
3e7ee490 | 849 | |
c50f7fb2 | 850 | VmbusChildDeviceRemove(channel->device_obj); |
e98cb276 | 851 | free_channel(channel); |
bd60c33e | 852 | } else { |
3e7ee490 | 853 | if (!start) |
3e7ee490 | 854 | start = channel; |
3e7ee490 HJ |
855 | } |
856 | } | |
857 | ||
0f5e44ca | 858 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
859 | } |
860 | ||
454f18a9 | 861 | /* eof */ |