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