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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> |
09d50ff8 | 26 | #include "include/logging.h" |
3e7ee490 HJ |
27 | #include "VersionInfo.h" |
28 | #include "VmbusPrivate.h" | |
29 | ||
454f18a9 BP |
30 | |
31 | /* Globals */ | |
32 | ||
3e7ee490 HJ |
33 | static const char* gDriverName="vmbus"; |
34 | ||
454f18a9 BP |
35 | /* Windows vmbus does not defined this. |
36 | * We defined this to be consistent with other devices | |
37 | */ | |
38 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
3e7ee490 HJ |
39 | static const GUID gVmbusDeviceType={ |
40 | .Data = {0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85} | |
41 | }; | |
42 | ||
454f18a9 | 43 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ |
3e7ee490 HJ |
44 | static const GUID gVmbusDeviceId={ |
45 | .Data = {0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5} | |
46 | }; | |
47 | ||
454f18a9 BP |
48 | static DRIVER_OBJECT* gDriver; /* vmbus driver object */ |
49 | static DEVICE_OBJECT* gDevice; /* vmbus root device */ | |
50 | ||
51 | ||
3e7ee490 | 52 | |
454f18a9 | 53 | /* Internal routines */ |
3e7ee490 | 54 | |
3e7ee490 HJ |
55 | |
56 | static void | |
57 | VmbusGetChannelInterface( | |
58 | VMBUS_CHANNEL_INTERFACE *Interface | |
59 | ); | |
60 | ||
61 | static void | |
62 | VmbusGetChannelInfo( | |
63 | DEVICE_OBJECT *DeviceObject, | |
64 | DEVICE_INFO *DeviceInfo | |
65 | ); | |
66 | ||
67 | static void | |
68 | VmbusGetChannelOffers( | |
69 | void | |
70 | ); | |
71 | ||
72 | static int | |
73 | VmbusOnDeviceAdd( | |
74 | DEVICE_OBJECT *Device, | |
75 | void *AdditionalInfo | |
76 | ); | |
77 | ||
78 | static int | |
79 | VmbusOnDeviceRemove( | |
80 | DEVICE_OBJECT* dev | |
81 | ); | |
82 | ||
83 | static void | |
84 | VmbusOnCleanup( | |
85 | DRIVER_OBJECT* drv | |
86 | ); | |
87 | ||
88 | static int | |
89 | VmbusOnISR( | |
90 | DRIVER_OBJECT* drv | |
91 | ); | |
92 | ||
93 | static void | |
94 | VmbusOnMsgDPC( | |
95 | DRIVER_OBJECT* drv | |
96 | ); | |
97 | ||
98 | static void | |
99 | VmbusOnEventDPC( | |
100 | DRIVER_OBJECT* drv | |
101 | ); | |
102 | ||
103 | /*++; | |
104 | ||
105 | Name: | |
106 | VmbusInitialize() | |
107 | ||
108 | Description: | |
109 | Main entry point | |
110 | ||
111 | --*/ | |
112 | int | |
113 | VmbusInitialize( | |
114 | DRIVER_OBJECT* drv | |
115 | ) | |
116 | { | |
117 | VMBUS_DRIVER_OBJECT* driver = (VMBUS_DRIVER_OBJECT*)drv; | |
118 | int ret=0; | |
119 | ||
120 | DPRINT_ENTER(VMBUS); | |
121 | ||
122 | DPRINT_INFO(VMBUS, "+++++++ Build Date=%s %s +++++++", VersionDate, VersionTime); | |
123 | DPRINT_INFO(VMBUS, "+++++++ Build Description=%s +++++++", VersionDesc); | |
124 | ||
125 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", VMBUS_REVISION_NUMBER); | |
126 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", VMBUS_MESSAGE_SINT); | |
127 | ||
226408a4 | 128 | DPRINT_DBG(VMBUS, "sizeof(VMBUS_CHANNEL_PACKET_PAGE_BUFFER)=%ld, sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%ld", |
3fcc523a | 129 | sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER), sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)); |
3e7ee490 HJ |
130 | |
131 | drv->name = gDriverName; | |
132 | memcpy(&drv->deviceType, &gVmbusDeviceType, sizeof(GUID)); | |
133 | ||
454f18a9 | 134 | /* Setup dispatch table */ |
3e7ee490 HJ |
135 | driver->Base.OnDeviceAdd = VmbusOnDeviceAdd; |
136 | driver->Base.OnDeviceRemove = VmbusOnDeviceRemove; | |
137 | driver->Base.OnCleanup = VmbusOnCleanup; | |
138 | driver->OnIsr = VmbusOnISR; | |
139 | driver->OnMsgDpc = VmbusOnMsgDPC; | |
140 | driver->OnEventDpc = VmbusOnEventDPC; | |
141 | driver->GetChannelOffers = VmbusGetChannelOffers; | |
142 | driver->GetChannelInterface = VmbusGetChannelInterface; | |
143 | driver->GetChannelInfo = VmbusGetChannelInfo; | |
144 | ||
454f18a9 | 145 | /* Hypervisor initialization...setup hypercall page..etc */ |
3e7ee490 HJ |
146 | ret = HvInit(); |
147 | if (ret != 0) | |
148 | { | |
149 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", ret); | |
150 | } | |
151 | ||
152 | gDriver = drv; | |
153 | ||
154 | DPRINT_EXIT(VMBUS); | |
155 | ||
156 | return ret; | |
157 | } | |
158 | ||
159 | ||
160 | /*++; | |
161 | ||
162 | Name: | |
163 | VmbusGetChannelOffers() | |
164 | ||
165 | Description: | |
166 | Retrieve the channel offers from the parent partition | |
167 | ||
168 | --*/ | |
169 | ||
170 | static void | |
171 | VmbusGetChannelOffers(void) | |
172 | { | |
173 | DPRINT_ENTER(VMBUS); | |
174 | VmbusChannelRequestOffers(); | |
175 | DPRINT_EXIT(VMBUS); | |
176 | } | |
177 | ||
178 | ||
179 | /*++; | |
180 | ||
181 | Name: | |
182 | VmbusGetChannelInterface() | |
183 | ||
184 | Description: | |
185 | Get the channel interface | |
186 | ||
187 | --*/ | |
188 | static void | |
189 | VmbusGetChannelInterface( | |
190 | VMBUS_CHANNEL_INTERFACE *Interface | |
191 | ) | |
192 | { | |
193 | GetChannelInterface(Interface); | |
194 | } | |
195 | ||
196 | ||
197 | /*++; | |
198 | ||
199 | Name: | |
200 | VmbusGetChannelInterface() | |
201 | ||
202 | Description: | |
203 | Get the device info for the specified device object | |
204 | ||
205 | --*/ | |
206 | static void | |
207 | VmbusGetChannelInfo( | |
208 | DEVICE_OBJECT *DeviceObject, | |
209 | DEVICE_INFO *DeviceInfo | |
210 | ) | |
211 | { | |
212 | GetChannelInfo(DeviceObject, DeviceInfo); | |
213 | } | |
214 | ||
215 | ||
216 | ||
217 | /*++ | |
218 | ||
219 | Name: | |
220 | VmbusCreateChildDevice() | |
221 | ||
222 | Description: | |
223 | Creates the child device on the bus that represents the channel offer | |
224 | ||
225 | --*/ | |
226 | ||
227 | DEVICE_OBJECT* | |
228 | VmbusChildDeviceCreate( | |
229 | GUID DeviceType, | |
230 | GUID DeviceInstance, | |
231 | void *Context) | |
232 | { | |
233 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
234 | ||
235 | return vmbusDriver->OnChildDeviceCreate( | |
236 | DeviceType, | |
237 | DeviceInstance, | |
238 | Context); | |
239 | } | |
240 | ||
241 | ||
242 | /*++ | |
243 | ||
244 | Name: | |
245 | VmbusChildDeviceAdd() | |
246 | ||
247 | Description: | |
248 | Registers the child device with the vmbus | |
249 | ||
250 | --*/ | |
251 | int | |
252 | VmbusChildDeviceAdd( | |
253 | DEVICE_OBJECT* ChildDevice) | |
254 | { | |
255 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
256 | ||
257 | return vmbusDriver->OnChildDeviceAdd(gDevice, ChildDevice); | |
258 | } | |
259 | ||
260 | ||
261 | /*++ | |
262 | ||
263 | Name: | |
264 | VmbusChildDeviceRemove() | |
265 | ||
266 | Description: | |
267 | Unregisters the child device from the vmbus | |
268 | ||
269 | --*/ | |
270 | void | |
271 | VmbusChildDeviceRemove( | |
272 | DEVICE_OBJECT* ChildDevice) | |
273 | { | |
274 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
275 | ||
276 | vmbusDriver->OnChildDeviceRemove(ChildDevice); | |
277 | } | |
278 | ||
279 | /*++ | |
280 | ||
281 | Name: | |
282 | VmbusChildDeviceDestroy() | |
283 | ||
284 | Description: | |
285 | Release the child device from the vmbus | |
286 | ||
287 | --*/ | |
454f18a9 BP |
288 | |
289 | /* ************** | |
290 | void | |
291 | VmbusChildDeviceDestroy( | |
292 | DEVICE_OBJECT* ChildDevice | |
293 | ) | |
294 | { | |
295 | VMBUS_DRIVER_OBJECT* vmbusDriver = (VMBUS_DRIVER_OBJECT*)gDriver; | |
296 | ||
297 | vmbusDriver->OnChildDeviceDestroy(ChildDevice); | |
298 | } | |
299 | ************* */ | |
3e7ee490 HJ |
300 | |
301 | /*++ | |
302 | ||
303 | Name: | |
304 | VmbusOnDeviceAdd() | |
305 | ||
306 | Description: | |
307 | Callback when the root bus device is added | |
308 | ||
309 | --*/ | |
310 | static int | |
311 | VmbusOnDeviceAdd( | |
312 | DEVICE_OBJECT *dev, | |
313 | void *AdditionalInfo | |
314 | ) | |
315 | { | |
4d643114 | 316 | u32 *irqvector = (u32*) AdditionalInfo; |
3e7ee490 HJ |
317 | int ret=0; |
318 | ||
319 | DPRINT_ENTER(VMBUS); | |
320 | ||
321 | gDevice = dev; | |
322 | ||
323 | memcpy(&gDevice->deviceType, &gVmbusDeviceType, sizeof(GUID)); | |
324 | memcpy(&gDevice->deviceInstance, &gVmbusDeviceId, sizeof(GUID)); | |
325 | ||
454f18a9 BP |
326 | /* strcpy(dev->name, "vmbus"); */ |
327 | /* SynIC setup... */ | |
3e7ee490 HJ |
328 | ret = HvSynicInit(*irqvector); |
329 | ||
454f18a9 | 330 | /* Connect to VMBus in the root partition */ |
3e7ee490 HJ |
331 | ret = VmbusConnect(); |
332 | ||
454f18a9 | 333 | /* VmbusSendEvent(device->localPortId+1); */ |
3e7ee490 HJ |
334 | DPRINT_EXIT(VMBUS); |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
339 | ||
340 | /*++ | |
341 | ||
342 | Name: | |
343 | VmbusOnDeviceRemove() | |
344 | ||
345 | Description: | |
346 | Callback when the root bus device is removed | |
347 | ||
348 | --*/ | |
349 | int VmbusOnDeviceRemove( | |
350 | DEVICE_OBJECT* dev | |
351 | ) | |
352 | { | |
353 | int ret=0; | |
354 | ||
355 | DPRINT_ENTER(VMBUS); | |
356 | ||
357 | VmbusChannelReleaseUnattachedChannels(); | |
358 | ||
359 | VmbusDisconnect(); | |
360 | ||
361 | HvSynicCleanup(); | |
362 | ||
363 | DPRINT_EXIT(VMBUS); | |
364 | ||
365 | return ret; | |
366 | } | |
367 | ||
368 | ||
369 | /*++ | |
370 | ||
371 | Name: | |
372 | VmbusOnCleanup() | |
373 | ||
374 | Description: | |
375 | Perform any cleanup when the driver is removed | |
376 | ||
377 | --*/ | |
378 | void | |
379 | VmbusOnCleanup( | |
380 | DRIVER_OBJECT* drv | |
381 | ) | |
382 | { | |
454f18a9 | 383 | /* VMBUS_DRIVER_OBJECT* driver = (VMBUS_DRIVER_OBJECT*)drv; */ |
3e7ee490 HJ |
384 | |
385 | DPRINT_ENTER(VMBUS); | |
386 | ||
387 | HvCleanup(); | |
388 | ||
389 | DPRINT_EXIT(VMBUS); | |
390 | } | |
391 | ||
392 | ||
393 | /*++ | |
394 | ||
395 | Name: | |
396 | VmbusOnMsgDPC() | |
397 | ||
398 | Description: | |
399 | DPC routine to handle messages from the hypervisior | |
400 | ||
401 | --*/ | |
402 | void | |
403 | VmbusOnMsgDPC( | |
404 | DRIVER_OBJECT* drv | |
405 | ) | |
406 | { | |
407 | void *page_addr = gHvContext.synICMessagePage[0]; | |
408 | ||
409 | HV_MESSAGE* msg = (HV_MESSAGE*)page_addr + VMBUS_MESSAGE_SINT; | |
410 | HV_MESSAGE *copied; | |
411 | while (1) | |
412 | { | |
454f18a9 | 413 | if (msg->Header.MessageType == HvMessageTypeNone) /* no msg */ |
3e7ee490 HJ |
414 | { |
415 | break; | |
416 | } | |
417 | else | |
418 | { | |
0a72f3cf | 419 | copied = kmalloc(sizeof(HV_MESSAGE), GFP_ATOMIC); |
3e7ee490 HJ |
420 | if (copied == NULL) |
421 | { | |
422 | continue; | |
423 | } | |
424 | ||
425 | memcpy(copied, msg, sizeof(HV_MESSAGE)); | |
426 | WorkQueueQueueWorkItem(gVmbusConnection.WorkQueue, VmbusOnChannelMessage, (void*)copied); | |
427 | } | |
428 | ||
429 | msg->Header.MessageType = HvMessageTypeNone; | |
430 | ||
454f18a9 BP |
431 | /* |
432 | * Make sure the write to MessageType (ie set to | |
433 | * HvMessageTypeNone) happens before we read the | |
434 | * MessagePending and EOMing. Otherwise, the EOMing | |
435 | * will not deliver any more messages since there is | |
436 | * no empty slot | |
437 | */ | |
28b6ca9c | 438 | mb(); |
3e7ee490 HJ |
439 | |
440 | if (msg->Header.MessageFlags.MessagePending) | |
441 | { | |
454f18a9 BP |
442 | /* |
443 | * This will cause message queue rescan to | |
444 | * possibly deliver another msg from the | |
445 | * hypervisor | |
446 | */ | |
3e7ee490 HJ |
447 | WriteMsr(HV_X64_MSR_EOM, 0); |
448 | } | |
449 | } | |
450 | } | |
451 | ||
452 | /*++ | |
453 | ||
454 | Name: | |
455 | VmbusOnEventDPC() | |
456 | ||
457 | Description: | |
458 | DPC routine to handle events from the hypervisior | |
459 | ||
460 | --*/ | |
461 | void | |
462 | VmbusOnEventDPC( | |
463 | DRIVER_OBJECT* drv | |
464 | ) | |
465 | { | |
454f18a9 | 466 | /* TODO: Process any events */ |
3e7ee490 HJ |
467 | VmbusOnEvents(); |
468 | } | |
469 | ||
470 | ||
471 | /*++ | |
472 | ||
473 | Name: | |
474 | VmbusOnISR() | |
475 | ||
476 | Description: | |
477 | ISR routine | |
478 | ||
479 | --*/ | |
480 | int | |
481 | VmbusOnISR( | |
482 | DRIVER_OBJECT* drv | |
483 | ) | |
484 | { | |
454f18a9 | 485 | /* VMBUS_DRIVER_OBJECT* driver = (VMBUS_DRIVER_OBJECT*)drv; */ |
3e7ee490 HJ |
486 | |
487 | int ret=0; | |
454f18a9 | 488 | /* struct page* page; */ |
3e7ee490 HJ |
489 | void *page_addr; |
490 | HV_MESSAGE* msg; | |
491 | HV_SYNIC_EVENT_FLAGS* event; | |
492 | ||
454f18a9 BP |
493 | /* page = SynICMessagePage[0]; */ |
494 | /* page_addr = page_address(page); */ | |
3e7ee490 HJ |
495 | page_addr = gHvContext.synICMessagePage[0]; |
496 | msg = (HV_MESSAGE*)page_addr + VMBUS_MESSAGE_SINT; | |
497 | ||
498 | DPRINT_ENTER(VMBUS); | |
499 | ||
454f18a9 | 500 | /* Check if there are actual msgs to be process */ |
3e7ee490 HJ |
501 | if (msg->Header.MessageType != HvMessageTypeNone) |
502 | { | |
503 | DPRINT_DBG(VMBUS, "received msg type %d size %d", msg->Header.MessageType, msg->Header.PayloadSize); | |
504 | ret |= 0x1; | |
505 | } | |
506 | ||
454f18a9 | 507 | /* TODO: Check if there are events to be process */ |
3e7ee490 HJ |
508 | page_addr = gHvContext.synICEventPage[0]; |
509 | event = (HV_SYNIC_EVENT_FLAGS*)page_addr + VMBUS_MESSAGE_SINT; | |
510 | ||
454f18a9 | 511 | /* Since we are a child, we only need to check bit 0 */ |
3e7ee490 HJ |
512 | if (BitTestAndClear(&event->Flags32[0], 0)) |
513 | { | |
514 | DPRINT_DBG(VMBUS, "received event %d", event->Flags32[0]); | |
515 | ret |= 0x2; | |
516 | } | |
517 | ||
518 | DPRINT_EXIT(VMBUS); | |
519 | return ret; | |
520 | } | |
521 | ||
454f18a9 | 522 | /* eof */ |