Commit | Line | Data |
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3e7ee490 HJ |
1 | /* |
2 | * | |
3 | * Copyright (c) 2009, Microsoft Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
17 | * | |
18 | * Authors: | |
19 | * Haiyang Zhang <haiyangz@microsoft.com> | |
20 | * Hank Janssen <hjanssen@microsoft.com> | |
21 | * | |
22 | */ | |
23 | ||
5654e932 | 24 | #include <linux/kernel.h> |
0ffa63b0 | 25 | #include <linux/mm.h> |
4983b39a | 26 | #include "osd.h" |
09d50ff8 | 27 | #include "include/logging.h" |
3e7ee490 HJ |
28 | #include "VersionInfo.h" |
29 | #include "VmbusPrivate.h" | |
30 | ||
454f18a9 BP |
31 | |
32 | /* Globals */ | |
33 | ||
3e7ee490 HJ |
34 | static const char* gDriverName="vmbus"; |
35 | ||
454f18a9 BP |
36 | /* Windows vmbus does not defined this. |
37 | * We defined this to be consistent with other devices | |
38 | */ | |
39 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
caf26a31 GKH |
40 | static const struct hv_guid gVmbusDeviceType = { |
41 | .data = { | |
42 | 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, | |
43 | 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85 | |
44 | } | |
3e7ee490 HJ |
45 | }; |
46 | ||
454f18a9 | 47 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ |
caf26a31 GKH |
48 | static const struct hv_guid gVmbusDeviceId = { |
49 | .data = { | |
50 | 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, | |
51 | 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5 | |
52 | } | |
3e7ee490 HJ |
53 | }; |
54 | ||
775ef25e | 55 | static struct hv_driver *gDriver; /* vmbus driver object */ |
3d3b5518 | 56 | static struct hv_device* gDevice; /* vmbus root device */ |
454f18a9 BP |
57 | |
58 | ||
3e7ee490 | 59 | |
454f18a9 | 60 | /* Internal routines */ |
3e7ee490 | 61 | |
3e7ee490 HJ |
62 | |
63 | static void | |
64 | VmbusGetChannelInterface( | |
65 | VMBUS_CHANNEL_INTERFACE *Interface | |
66 | ); | |
67 | ||
68 | static void | |
69 | VmbusGetChannelInfo( | |
3d3b5518 | 70 | struct hv_device *DeviceObject, |
3e7ee490 HJ |
71 | DEVICE_INFO *DeviceInfo |
72 | ); | |
73 | ||
74 | static void | |
75 | VmbusGetChannelOffers( | |
76 | void | |
77 | ); | |
78 | ||
79 | static int | |
80 | VmbusOnDeviceAdd( | |
3d3b5518 | 81 | struct hv_device *Device, |
3e7ee490 HJ |
82 | void *AdditionalInfo |
83 | ); | |
84 | ||
85 | static int | |
86 | VmbusOnDeviceRemove( | |
3d3b5518 | 87 | struct hv_device *dev |
3e7ee490 HJ |
88 | ); |
89 | ||
90 | static void | |
91 | VmbusOnCleanup( | |
775ef25e | 92 | struct hv_driver *drv |
3e7ee490 HJ |
93 | ); |
94 | ||
95 | static int | |
96 | VmbusOnISR( | |
775ef25e | 97 | struct hv_driver *drv |
3e7ee490 HJ |
98 | ); |
99 | ||
100 | static void | |
101 | VmbusOnMsgDPC( | |
775ef25e | 102 | struct hv_driver *drv |
3e7ee490 HJ |
103 | ); |
104 | ||
105 | static void | |
106 | VmbusOnEventDPC( | |
775ef25e | 107 | struct hv_driver *drv |
3e7ee490 HJ |
108 | ); |
109 | ||
110 | /*++; | |
111 | ||
112 | Name: | |
113 | VmbusInitialize() | |
114 | ||
115 | Description: | |
116 | Main entry point | |
117 | ||
118 | --*/ | |
119 | int | |
120 | VmbusInitialize( | |
775ef25e | 121 | struct hv_driver *drv |
3e7ee490 HJ |
122 | ) |
123 | { | |
124 | VMBUS_DRIVER_OBJECT* driver = (VMBUS_DRIVER_OBJECT*)drv; | |
125 | int ret=0; | |
126 | ||
127 | DPRINT_ENTER(VMBUS); | |
128 | ||
129 | DPRINT_INFO(VMBUS, "+++++++ Build Date=%s %s +++++++", VersionDate, VersionTime); | |
130 | DPRINT_INFO(VMBUS, "+++++++ Build Description=%s +++++++", VersionDesc); | |
131 | ||
132 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", VMBUS_REVISION_NUMBER); | |
133 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", VMBUS_MESSAGE_SINT); | |
134 | ||
b7d7ae6f | 135 | DPRINT_DBG(VMBUS, "sizeof(VMBUS_CHANNEL_PACKET_PAGE_BUFFER)=%zd, sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", |
3fcc523a | 136 | sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER), sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)); |
3e7ee490 HJ |
137 | |
138 | drv->name = gDriverName; | |
caf26a31 | 139 | memcpy(&drv->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid)); |
3e7ee490 | 140 | |
454f18a9 | 141 | /* Setup dispatch table */ |
3e7ee490 HJ |
142 | driver->Base.OnDeviceAdd = VmbusOnDeviceAdd; |
143 | driver->Base.OnDeviceRemove = VmbusOnDeviceRemove; | |
144 | driver->Base.OnCleanup = VmbusOnCleanup; | |
145 | driver->OnIsr = VmbusOnISR; | |
146 | driver->OnMsgDpc = VmbusOnMsgDPC; | |
147 | driver->OnEventDpc = VmbusOnEventDPC; | |
148 | driver->GetChannelOffers = VmbusGetChannelOffers; | |
149 | driver->GetChannelInterface = VmbusGetChannelInterface; | |
150 | driver->GetChannelInfo = VmbusGetChannelInfo; | |
151 | ||
454f18a9 | 152 | /* Hypervisor initialization...setup hypercall page..etc */ |
3e7ee490 HJ |
153 | ret = HvInit(); |
154 | if (ret != 0) | |
155 | { | |
156 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", ret); | |
157 | } | |
158 | ||
159 | gDriver = drv; | |
160 | ||
161 | DPRINT_EXIT(VMBUS); | |
162 | ||
163 | return ret; | |
164 | } | |
165 | ||
166 | ||
167 | /*++; | |
168 | ||
169 | Name: | |
170 | VmbusGetChannelOffers() | |
171 | ||
172 | Description: | |
173 | Retrieve the channel offers from the parent partition | |
174 | ||
175 | --*/ | |
176 | ||
177 | static void | |
178 | VmbusGetChannelOffers(void) | |
179 | { | |
180 | DPRINT_ENTER(VMBUS); | |
181 | VmbusChannelRequestOffers(); | |
182 | DPRINT_EXIT(VMBUS); | |
183 | } | |
184 | ||
185 | ||
186 | /*++; | |
187 | ||
188 | Name: | |
189 | VmbusGetChannelInterface() | |
190 | ||
191 | Description: | |
192 | Get the channel interface | |
193 | ||
194 | --*/ | |
195 | static void | |
196 | VmbusGetChannelInterface( | |
197 | VMBUS_CHANNEL_INTERFACE *Interface | |
198 | ) | |
199 | { | |
200 | GetChannelInterface(Interface); | |
201 | } | |
202 | ||
203 | ||
204 | /*++; | |
205 | ||
206 | Name: | |
207 | VmbusGetChannelInterface() | |
208 | ||
209 | Description: | |
210 | Get the device info for the specified device object | |
211 | ||
212 | --*/ | |
213 | static void | |
214 | VmbusGetChannelInfo( | |
3d3b5518 | 215 | struct hv_device *DeviceObject, |
3e7ee490 HJ |
216 | DEVICE_INFO *DeviceInfo |
217 | ) | |
218 | { | |
219 | GetChannelInfo(DeviceObject, DeviceInfo); | |
220 | } | |
221 | ||
222 | ||
223 | ||
224 | /*++ | |
225 | ||
226 | Name: | |
227 | VmbusCreateChildDevice() | |
228 | ||
229 | Description: | |
230 | Creates the child device on the bus that represents the channel offer | |
231 | ||
232 | --*/ | |
233 | ||
daaa8cc3 GKH |
234 | struct hv_device *VmbusChildDeviceCreate(struct hv_guid *DeviceType, |
235 | struct hv_guid *DeviceInstance, | |
f346fdc2 | 236 | void *Context) |
3e7ee490 HJ |
237 | { |
238 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
239 | ||
240 | return vmbusDriver->OnChildDeviceCreate( | |
241 | DeviceType, | |
242 | DeviceInstance, | |
243 | Context); | |
244 | } | |
245 | ||
246 | ||
247 | /*++ | |
248 | ||
249 | Name: | |
250 | VmbusChildDeviceAdd() | |
251 | ||
252 | Description: | |
253 | Registers the child device with the vmbus | |
254 | ||
255 | --*/ | |
f346fdc2 | 256 | int VmbusChildDeviceAdd(struct hv_device *ChildDevice) |
3e7ee490 HJ |
257 | { |
258 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
259 | ||
260 | return vmbusDriver->OnChildDeviceAdd(gDevice, ChildDevice); | |
261 | } | |
262 | ||
263 | ||
264 | /*++ | |
265 | ||
266 | Name: | |
267 | VmbusChildDeviceRemove() | |
268 | ||
269 | Description: | |
270 | Unregisters the child device from the vmbus | |
271 | ||
272 | --*/ | |
f346fdc2 | 273 | void VmbusChildDeviceRemove(struct hv_device *ChildDevice) |
3e7ee490 HJ |
274 | { |
275 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
276 | ||
277 | vmbusDriver->OnChildDeviceRemove(ChildDevice); | |
278 | } | |
279 | ||
280 | /*++ | |
281 | ||
282 | Name: | |
283 | VmbusChildDeviceDestroy() | |
284 | ||
285 | Description: | |
286 | Release the child device from the vmbus | |
287 | ||
288 | --*/ | |
454f18a9 BP |
289 | |
290 | /* ************** | |
291 | void | |
292 | VmbusChildDeviceDestroy( | |
3d3b5518 | 293 | struct hv_device *ChildDevice |
454f18a9 BP |
294 | ) |
295 | { | |
296 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
297 | ||
298 | vmbusDriver->OnChildDeviceDestroy(ChildDevice); | |
299 | } | |
300 | ************* */ | |
3e7ee490 HJ |
301 | |
302 | /*++ | |
303 | ||
304 | Name: | |
305 | VmbusOnDeviceAdd() | |
306 | ||
307 | Description: | |
308 | Callback when the root bus device is added | |
309 | ||
310 | --*/ | |
311 | static int | |
312 | VmbusOnDeviceAdd( | |
3d3b5518 | 313 | struct hv_device *dev, |
3e7ee490 HJ |
314 | void *AdditionalInfo |
315 | ) | |
316 | { | |
4d643114 | 317 | u32 *irqvector = (u32*) AdditionalInfo; |
3e7ee490 HJ |
318 | int ret=0; |
319 | ||
320 | DPRINT_ENTER(VMBUS); | |
321 | ||
322 | gDevice = dev; | |
323 | ||
caf26a31 GKH |
324 | memcpy(&gDevice->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid)); |
325 | memcpy(&gDevice->deviceInstance, &gVmbusDeviceId, sizeof(struct hv_guid)); | |
3e7ee490 | 326 | |
454f18a9 BP |
327 | /* strcpy(dev->name, "vmbus"); */ |
328 | /* SynIC setup... */ | |
3e7ee490 HJ |
329 | ret = HvSynicInit(*irqvector); |
330 | ||
454f18a9 | 331 | /* Connect to VMBus in the root partition */ |
3e7ee490 HJ |
332 | ret = VmbusConnect(); |
333 | ||
454f18a9 | 334 | /* VmbusSendEvent(device->localPortId+1); */ |
3e7ee490 HJ |
335 | DPRINT_EXIT(VMBUS); |
336 | ||
337 | return ret; | |
338 | } | |
339 | ||
340 | ||
341 | /*++ | |
342 | ||
343 | Name: | |
344 | VmbusOnDeviceRemove() | |
345 | ||
346 | Description: | |
347 | Callback when the root bus device is removed | |
348 | ||
349 | --*/ | |
bd1de709 | 350 | static int VmbusOnDeviceRemove( |
3d3b5518 | 351 | struct hv_device *dev |
3e7ee490 HJ |
352 | ) |
353 | { | |
354 | int ret=0; | |
355 | ||
356 | DPRINT_ENTER(VMBUS); | |
357 | ||
358 | VmbusChannelReleaseUnattachedChannels(); | |
359 | ||
360 | VmbusDisconnect(); | |
361 | ||
362 | HvSynicCleanup(); | |
363 | ||
364 | DPRINT_EXIT(VMBUS); | |
365 | ||
366 | return ret; | |
367 | } | |
368 | ||
369 | ||
370 | /*++ | |
371 | ||
372 | Name: | |
373 | VmbusOnCleanup() | |
374 | ||
375 | Description: | |
376 | Perform any cleanup when the driver is removed | |
377 | ||
378 | --*/ | |
bd1de709 | 379 | static void |
3e7ee490 | 380 | VmbusOnCleanup( |
775ef25e | 381 | struct hv_driver *drv |
3e7ee490 HJ |
382 | ) |
383 | { | |
454f18a9 | 384 | /* VMBUS_DRIVER_OBJECT* driver = (VMBUS_DRIVER_OBJECT*)drv; */ |
3e7ee490 HJ |
385 | |
386 | DPRINT_ENTER(VMBUS); | |
387 | ||
388 | HvCleanup(); | |
389 | ||
390 | DPRINT_EXIT(VMBUS); | |
391 | } | |
392 | ||
393 | ||
394 | /*++ | |
395 | ||
396 | Name: | |
397 | VmbusOnMsgDPC() | |
398 | ||
399 | Description: | |
400 | DPC routine to handle messages from the hypervisior | |
401 | ||
402 | --*/ | |
bd1de709 | 403 | static void |
3e7ee490 | 404 | VmbusOnMsgDPC( |
775ef25e | 405 | struct hv_driver *drv |
3e7ee490 HJ |
406 | ) |
407 | { | |
408 | void *page_addr = gHvContext.synICMessagePage[0]; | |
409 | ||
eacb1b4d GKH |
410 | struct hv_message *msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
411 | struct hv_message *copied; | |
3e7ee490 HJ |
412 | while (1) |
413 | { | |
454f18a9 | 414 | if (msg->Header.MessageType == HvMessageTypeNone) /* no msg */ |
3e7ee490 HJ |
415 | { |
416 | break; | |
417 | } | |
418 | else | |
419 | { | |
eacb1b4d | 420 | copied = kmalloc(sizeof(*copied), GFP_ATOMIC); |
3e7ee490 HJ |
421 | if (copied == NULL) |
422 | { | |
423 | continue; | |
424 | } | |
425 | ||
eacb1b4d | 426 | memcpy(copied, msg, sizeof(*copied)); |
de65a384 BP |
427 | osd_schedule_callback(gVmbusConnection.WorkQueue, |
428 | VmbusOnChannelMessage, | |
429 | (void *)copied); | |
3e7ee490 HJ |
430 | } |
431 | ||
432 | msg->Header.MessageType = HvMessageTypeNone; | |
433 | ||
454f18a9 BP |
434 | /* |
435 | * Make sure the write to MessageType (ie set to | |
436 | * HvMessageTypeNone) happens before we read the | |
437 | * MessagePending and EOMing. Otherwise, the EOMing | |
438 | * will not deliver any more messages since there is | |
439 | * no empty slot | |
440 | */ | |
28b6ca9c | 441 | mb(); |
3e7ee490 HJ |
442 | |
443 | if (msg->Header.MessageFlags.MessagePending) | |
444 | { | |
454f18a9 BP |
445 | /* |
446 | * This will cause message queue rescan to | |
447 | * possibly deliver another msg from the | |
448 | * hypervisor | |
449 | */ | |
a51ed7d6 | 450 | wrmsrl(HV_X64_MSR_EOM, 0); |
3e7ee490 HJ |
451 | } |
452 | } | |
453 | } | |
454 | ||
455 | /*++ | |
456 | ||
457 | Name: | |
458 | VmbusOnEventDPC() | |
459 | ||
460 | Description: | |
461 | DPC routine to handle events from the hypervisior | |
462 | ||
463 | --*/ | |
bd1de709 | 464 | static void |
3e7ee490 | 465 | VmbusOnEventDPC( |
775ef25e | 466 | struct hv_driver* drv |
3e7ee490 HJ |
467 | ) |
468 | { | |
454f18a9 | 469 | /* TODO: Process any events */ |
3e7ee490 HJ |
470 | VmbusOnEvents(); |
471 | } | |
472 | ||
473 | ||
474 | /*++ | |
475 | ||
476 | Name: | |
477 | VmbusOnISR() | |
478 | ||
479 | Description: | |
480 | ISR routine | |
481 | ||
482 | --*/ | |
bd1de709 | 483 | static int |
3e7ee490 | 484 | VmbusOnISR( |
775ef25e | 485 | struct hv_driver *drv |
3e7ee490 HJ |
486 | ) |
487 | { | |
454f18a9 | 488 | /* VMBUS_DRIVER_OBJECT* driver = (VMBUS_DRIVER_OBJECT*)drv; */ |
3e7ee490 HJ |
489 | |
490 | int ret=0; | |
454f18a9 | 491 | /* struct page* page; */ |
3e7ee490 | 492 | void *page_addr; |
eacb1b4d GKH |
493 | struct hv_message *msg; |
494 | union hv_synic_event_flags *event; | |
3e7ee490 | 495 | |
454f18a9 BP |
496 | /* page = SynICMessagePage[0]; */ |
497 | /* page_addr = page_address(page); */ | |
3e7ee490 | 498 | page_addr = gHvContext.synICMessagePage[0]; |
eacb1b4d | 499 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
3e7ee490 HJ |
500 | |
501 | DPRINT_ENTER(VMBUS); | |
502 | ||
454f18a9 | 503 | /* Check if there are actual msgs to be process */ |
3e7ee490 HJ |
504 | if (msg->Header.MessageType != HvMessageTypeNone) |
505 | { | |
506 | DPRINT_DBG(VMBUS, "received msg type %d size %d", msg->Header.MessageType, msg->Header.PayloadSize); | |
507 | ret |= 0x1; | |
508 | } | |
509 | ||
454f18a9 | 510 | /* TODO: Check if there are events to be process */ |
3e7ee490 | 511 | page_addr = gHvContext.synICEventPage[0]; |
eacb1b4d | 512 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; |
3e7ee490 | 513 | |
454f18a9 | 514 | /* Since we are a child, we only need to check bit 0 */ |
7c369f40 | 515 | if (test_and_clear_bit(0, (unsigned long *) &event->Flags32[0])) |
3e7ee490 HJ |
516 | { |
517 | DPRINT_DBG(VMBUS, "received event %d", event->Flags32[0]); | |
518 | ret |= 0x2; | |
519 | } | |
520 | ||
521 | DPRINT_EXIT(VMBUS); | |
522 | return ret; | |
523 | } | |
524 | ||
454f18a9 | 525 | /* eof */ |