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bef4a34a 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 | ||
97f4ee3d | 24 | #define KERNEL_2_6_27 |
bef4a34a | 25 | |
97f4ee3d | 26 | #include "include/logging.h" |
bef4a34a | 27 | |
97f4ee3d GKH |
28 | #include "include/StorVscApi.h" |
29 | #include "include/VmbusPacketFormat.h" | |
30 | #include "include/vstorage.h" | |
bef4a34a HJ |
31 | |
32 | ||
33 | // | |
34 | // #defines | |
35 | // | |
36 | ||
37 | // | |
38 | // Data types | |
39 | // | |
40 | ||
41 | typedef struct _STORVSC_REQUEST_EXTENSION { | |
42 | //LIST_ENTRY ListEntry; | |
43 | ||
44 | STORVSC_REQUEST *Request; | |
45 | DEVICE_OBJECT *Device; | |
46 | ||
47 | // Synchronize the request/response if needed | |
48 | HANDLE WaitEvent; | |
49 | ||
50 | VSTOR_PACKET VStorPacket; | |
51 | } STORVSC_REQUEST_EXTENSION; | |
52 | ||
53 | ||
54 | // A storvsc device is a device object that contains a vmbus channel | |
55 | typedef struct _STORVSC_DEVICE{ | |
56 | DEVICE_OBJECT *Device; | |
57 | ||
58 | int RefCount; // 0 indicates the device is being destroyed | |
59 | ||
60 | int NumOutstandingRequests; | |
61 | ||
62 | // Each unique Port/Path/Target represents 1 channel ie scsi controller. In reality, the pathid, targetid is always 0 | |
63 | // and the port is set by us | |
64 | ULONG PortNumber; | |
65 | UCHAR PathId; | |
66 | UCHAR TargetId; | |
67 | ||
68 | //LIST_ENTRY OutstandingRequestList; | |
69 | //HANDLE OutstandingRequestLock; | |
70 | ||
71 | // Used for vsc/vsp channel reset process | |
72 | STORVSC_REQUEST_EXTENSION InitRequest; | |
73 | ||
74 | STORVSC_REQUEST_EXTENSION ResetRequest; | |
75 | ||
76 | } STORVSC_DEVICE; | |
77 | ||
78 | ||
79 | // | |
80 | // Globals | |
81 | // | |
82 | static const char* gDriverName="storvsc"; | |
83 | ||
84 | //{ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} | |
85 | static const GUID gStorVscDeviceType={ | |
86 | .Data = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f} | |
87 | }; | |
88 | ||
89 | // | |
90 | // Internal routines | |
91 | // | |
92 | static int | |
93 | StorVscOnDeviceAdd( | |
94 | DEVICE_OBJECT *Device, | |
95 | void *AdditionalInfo | |
96 | ); | |
97 | ||
98 | static int | |
99 | StorVscOnDeviceRemove( | |
100 | DEVICE_OBJECT *Device | |
101 | ); | |
102 | ||
103 | static int | |
104 | StorVscOnIORequest( | |
105 | DEVICE_OBJECT *Device, | |
106 | STORVSC_REQUEST *Request | |
107 | ); | |
108 | ||
109 | static int | |
110 | StorVscOnHostReset( | |
111 | DEVICE_OBJECT *Device | |
112 | ); | |
113 | ||
114 | static void | |
115 | StorVscOnCleanup( | |
116 | DRIVER_OBJECT *Device | |
117 | ); | |
118 | ||
119 | static void | |
120 | StorVscOnChannelCallback( | |
8282c400 | 121 | void * Context |
bef4a34a HJ |
122 | ); |
123 | ||
124 | static void | |
125 | StorVscOnIOCompletion( | |
126 | DEVICE_OBJECT *Device, | |
127 | VSTOR_PACKET *VStorPacket, | |
128 | STORVSC_REQUEST_EXTENSION *RequestExt | |
129 | ); | |
130 | ||
131 | static void | |
132 | StorVscOnReceive( | |
133 | DEVICE_OBJECT *Device, | |
134 | VSTOR_PACKET *VStorPacket, | |
135 | STORVSC_REQUEST_EXTENSION *RequestExt | |
136 | ); | |
137 | ||
138 | static int | |
139 | StorVscConnectToVsp( | |
140 | DEVICE_OBJECT *Device | |
141 | ); | |
142 | ||
143 | static inline STORVSC_DEVICE* AllocStorDevice(DEVICE_OBJECT *Device) | |
144 | { | |
145 | STORVSC_DEVICE *storDevice; | |
146 | ||
147 | storDevice = MemAllocZeroed(sizeof(STORVSC_DEVICE)); | |
148 | if (!storDevice) | |
149 | return NULL; | |
150 | ||
151 | // Set to 2 to allow both inbound and outbound traffics | |
152 | // (ie GetStorDevice() and MustGetStorDevice()) to proceed. | |
153 | InterlockedCompareExchange(&storDevice->RefCount, 2, 0); | |
154 | ||
155 | storDevice->Device = Device; | |
156 | Device->Extension = storDevice; | |
157 | ||
158 | return storDevice; | |
159 | } | |
160 | ||
161 | static inline void FreeStorDevice(STORVSC_DEVICE *Device) | |
162 | { | |
163 | ASSERT(Device->RefCount == 0); | |
164 | MemFree(Device); | |
165 | } | |
166 | ||
167 | // Get the stordevice object iff exists and its refcount > 1 | |
168 | static inline STORVSC_DEVICE* GetStorDevice(DEVICE_OBJECT *Device) | |
169 | { | |
170 | STORVSC_DEVICE *storDevice; | |
171 | ||
172 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
173 | if (storDevice && storDevice->RefCount > 1) | |
174 | { | |
175 | InterlockedIncrement(&storDevice->RefCount); | |
176 | } | |
177 | else | |
178 | { | |
179 | storDevice = NULL; | |
180 | } | |
181 | ||
182 | return storDevice; | |
183 | } | |
184 | ||
185 | // Get the stordevice object iff exists and its refcount > 0 | |
186 | static inline STORVSC_DEVICE* MustGetStorDevice(DEVICE_OBJECT *Device) | |
187 | { | |
188 | STORVSC_DEVICE *storDevice; | |
189 | ||
190 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
191 | if (storDevice && storDevice->RefCount) | |
192 | { | |
193 | InterlockedIncrement(&storDevice->RefCount); | |
194 | } | |
195 | else | |
196 | { | |
197 | storDevice = NULL; | |
198 | } | |
199 | ||
200 | return storDevice; | |
201 | } | |
202 | ||
203 | static inline void PutStorDevice(DEVICE_OBJECT *Device) | |
204 | { | |
205 | STORVSC_DEVICE *storDevice; | |
206 | ||
207 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
208 | ASSERT(storDevice); | |
209 | ||
210 | InterlockedDecrement(&storDevice->RefCount); | |
211 | ASSERT(storDevice->RefCount); | |
212 | } | |
213 | ||
214 | // Drop ref count to 1 to effectively disable GetStorDevice() | |
215 | static inline STORVSC_DEVICE* ReleaseStorDevice(DEVICE_OBJECT *Device) | |
216 | { | |
217 | STORVSC_DEVICE *storDevice; | |
218 | ||
219 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
220 | ASSERT(storDevice); | |
221 | ||
222 | // Busy wait until the ref drop to 2, then set it to 1 | |
223 | while (InterlockedCompareExchange(&storDevice->RefCount, 1, 2) != 2) | |
224 | { | |
225 | Sleep(100); | |
226 | } | |
227 | ||
228 | return storDevice; | |
229 | } | |
230 | ||
231 | // Drop ref count to 0. No one can use StorDevice object. | |
232 | static inline STORVSC_DEVICE* FinalReleaseStorDevice(DEVICE_OBJECT *Device) | |
233 | { | |
234 | STORVSC_DEVICE *storDevice; | |
235 | ||
236 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
237 | ASSERT(storDevice); | |
238 | ||
239 | // Busy wait until the ref drop to 1, then set it to 0 | |
240 | while (InterlockedCompareExchange(&storDevice->RefCount, 0, 1) != 1) | |
241 | { | |
242 | Sleep(100); | |
243 | } | |
244 | ||
245 | Device->Extension = NULL; | |
246 | return storDevice; | |
247 | } | |
248 | ||
249 | /*++; | |
250 | ||
251 | ||
252 | Name: | |
253 | StorVscInitialize() | |
254 | ||
255 | Description: | |
256 | Main entry point | |
257 | ||
258 | --*/ | |
259 | int | |
260 | StorVscInitialize( | |
261 | DRIVER_OBJECT *Driver | |
262 | ) | |
263 | { | |
264 | STORVSC_DRIVER_OBJECT* storDriver = (STORVSC_DRIVER_OBJECT*)Driver; | |
265 | int ret=0; | |
266 | ||
267 | DPRINT_ENTER(STORVSC); | |
268 | ||
269 | DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%d sizeof(STORVSC_REQUEST_EXTENSION)=%d sizeof(VSTOR_PACKET)=%d, sizeof(VMSCSI_REQUEST)=%d", | |
270 | sizeof(STORVSC_REQUEST), sizeof(STORVSC_REQUEST_EXTENSION), sizeof(VSTOR_PACKET), sizeof(VMSCSI_REQUEST)); | |
271 | ||
272 | // Make sure we are at least 2 pages since 1 page is used for control | |
273 | ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1)); | |
274 | ||
275 | Driver->name = gDriverName; | |
276 | memcpy(&Driver->deviceType, &gStorVscDeviceType, sizeof(GUID)); | |
277 | ||
278 | storDriver->RequestExtSize = sizeof(STORVSC_REQUEST_EXTENSION); | |
279 | ||
280 | // Divide the ring buffer data size (which is 1 page less than the ring buffer size since that page is reserved for the ring buffer indices) | |
281 | // by the max request size (which is VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER + VSTOR_PACKET + UINT64) | |
282 | storDriver->MaxOutstandingRequestsPerChannel = | |
283 | ((storDriver->RingBufferSize - PAGE_SIZE) / ALIGN_UP(MAX_MULTIPAGE_BUFFER_PACKET + sizeof(VSTOR_PACKET) + sizeof(UINT64),sizeof(UINT64))); | |
284 | ||
285 | DPRINT_INFO(STORVSC, "max io %u, currently %u\n", storDriver->MaxOutstandingRequestsPerChannel, STORVSC_MAX_IO_REQUESTS); | |
286 | ||
287 | // Setup the dispatch table | |
288 | storDriver->Base.OnDeviceAdd = StorVscOnDeviceAdd; | |
289 | storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove; | |
290 | storDriver->Base.OnCleanup = StorVscOnCleanup; | |
291 | ||
292 | storDriver->OnIORequest = StorVscOnIORequest; | |
293 | storDriver->OnHostReset = StorVscOnHostReset; | |
294 | ||
295 | DPRINT_EXIT(STORVSC); | |
296 | ||
297 | return ret; | |
298 | } | |
299 | ||
300 | /*++ | |
301 | ||
302 | Name: | |
303 | StorVscOnDeviceAdd() | |
304 | ||
305 | Description: | |
306 | Callback when the device belonging to this driver is added | |
307 | ||
308 | --*/ | |
309 | int | |
310 | StorVscOnDeviceAdd( | |
311 | DEVICE_OBJECT *Device, | |
312 | void *AdditionalInfo | |
313 | ) | |
314 | { | |
315 | int ret=0; | |
316 | STORVSC_DEVICE *storDevice; | |
317 | //VMSTORAGE_CHANNEL_PROPERTIES *props; | |
318 | STORVSC_DEVICE_INFO *deviceInfo = (STORVSC_DEVICE_INFO*)AdditionalInfo; | |
319 | ||
320 | DPRINT_ENTER(STORVSC); | |
321 | ||
322 | storDevice = AllocStorDevice(Device); | |
323 | if (!storDevice) | |
324 | { | |
325 | ret = -1; | |
326 | goto Cleanup; | |
327 | } | |
328 | ||
329 | // Save the channel properties to our storvsc channel | |
330 | //props = (VMSTORAGE_CHANNEL_PROPERTIES*) channel->offerMsg.Offer.u.Standard.UserDefined; | |
331 | ||
332 | // FIXME: | |
333 | // If we support more than 1 scsi channel, we need to set the port number here | |
334 | // to the scsi channel but how do we get the scsi channel prior to the bus scan | |
335 | /*storChannel->PortNumber = 0; | |
336 | storChannel->PathId = props->PathId; | |
337 | storChannel->TargetId = props->TargetId;*/ | |
338 | ||
339 | storDevice->PortNumber = deviceInfo->PortNumber; | |
340 | // Send it back up | |
341 | ret = StorVscConnectToVsp(Device); | |
342 | ||
343 | //deviceInfo->PortNumber = storDevice->PortNumber; | |
344 | deviceInfo->PathId = storDevice->PathId; | |
345 | deviceInfo->TargetId = storDevice->TargetId; | |
346 | ||
347 | DPRINT_DBG(STORVSC, "assigned port %u, path %u target %u\n", storDevice->PortNumber, storDevice->PathId, storDevice->TargetId); | |
348 | ||
349 | Cleanup: | |
350 | DPRINT_EXIT(STORVSC); | |
351 | ||
352 | return ret; | |
353 | } | |
354 | ||
355 | static int StorVscChannelInit(DEVICE_OBJECT *Device) | |
356 | { | |
357 | int ret=0; | |
358 | STORVSC_DEVICE *storDevice; | |
359 | STORVSC_REQUEST_EXTENSION *request; | |
360 | VSTOR_PACKET *vstorPacket; | |
361 | ||
362 | storDevice = GetStorDevice(Device); | |
363 | if (!storDevice) | |
364 | { | |
365 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
366 | DPRINT_EXIT(STORVSC); | |
367 | return -1; | |
368 | } | |
369 | ||
370 | request = &storDevice->InitRequest; | |
371 | vstorPacket = &request->VStorPacket; | |
372 | ||
373 | // Now, initiate the vsc/vsp initialization protocol on the open channel | |
374 | ||
375 | memset(request, sizeof(STORVSC_REQUEST_EXTENSION), 0); | |
376 | request->WaitEvent = WaitEventCreate(); | |
377 | ||
378 | vstorPacket->Operation = VStorOperationBeginInitialization; | |
379 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
380 | ||
381 | /*SpinlockAcquire(gDriverExt.packetListLock); | |
382 | INSERT_TAIL_LIST(&gDriverExt.packetList, &packet->listEntry.entry); | |
383 | SpinlockRelease(gDriverExt.packetListLock);*/ | |
384 | ||
385 | DPRINT_INFO(STORVSC, "BEGIN_INITIALIZATION_OPERATION..."); | |
386 | ||
387 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
388 | vstorPacket, | |
389 | sizeof(VSTOR_PACKET), | |
390 | (ULONG_PTR)request, | |
391 | VmbusPacketTypeDataInBand, | |
392 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
393 | if ( ret != 0) | |
394 | { | |
395 | DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION"); | |
396 | goto Cleanup; | |
397 | } | |
398 | ||
399 | WaitEventWait(request->WaitEvent); | |
400 | ||
401 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
402 | { | |
403 | DPRINT_ERR(STORVSC, "BEGIN_INITIALIZATION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status); | |
404 | goto Cleanup; | |
405 | } | |
406 | ||
407 | DPRINT_INFO(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION..."); | |
408 | ||
409 | // reuse the packet for version range supported | |
410 | memset(vstorPacket, sizeof(VSTOR_PACKET), 0); | |
411 | vstorPacket->Operation = VStorOperationQueryProtocolVersion; | |
412 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
413 | ||
414 | vstorPacket->Version.MajorMinor = VMSTOR_PROTOCOL_VERSION_CURRENT; | |
415 | FILL_VMSTOR_REVISION(vstorPacket->Version.Revision); | |
416 | ||
417 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
418 | vstorPacket, | |
419 | sizeof(VSTOR_PACKET), | |
420 | (ULONG_PTR)request, | |
421 | VmbusPacketTypeDataInBand, | |
422 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
423 | if ( ret != 0) | |
424 | { | |
425 | DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION"); | |
426 | goto Cleanup; | |
427 | } | |
428 | ||
429 | WaitEventWait(request->WaitEvent); | |
430 | ||
431 | // TODO: Check returned version | |
432 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
433 | { | |
434 | DPRINT_ERR(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status); | |
435 | goto Cleanup; | |
436 | } | |
437 | ||
438 | // Query channel properties | |
439 | DPRINT_INFO(STORVSC, "QUERY_PROPERTIES_OPERATION..."); | |
440 | ||
441 | memset(vstorPacket, sizeof(VSTOR_PACKET), 0); | |
442 | vstorPacket->Operation = VStorOperationQueryProperties; | |
443 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
444 | vstorPacket->StorageChannelProperties.PortNumber = storDevice->PortNumber; | |
445 | ||
446 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
447 | vstorPacket, | |
448 | sizeof(VSTOR_PACKET), | |
449 | (ULONG_PTR)request, | |
450 | VmbusPacketTypeDataInBand, | |
451 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
452 | ||
453 | if ( ret != 0) | |
454 | { | |
455 | DPRINT_ERR(STORVSC, "unable to send QUERY_PROPERTIES_OPERATION"); | |
456 | goto Cleanup; | |
457 | } | |
458 | ||
459 | WaitEventWait(request->WaitEvent); | |
460 | ||
461 | // TODO: Check returned version | |
462 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
463 | { | |
464 | DPRINT_ERR(STORVSC, "QUERY_PROPERTIES_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status); | |
465 | goto Cleanup; | |
466 | } | |
467 | ||
468 | //storDevice->PortNumber = vstorPacket->StorageChannelProperties.PortNumber; | |
469 | storDevice->PathId = vstorPacket->StorageChannelProperties.PathId; | |
470 | storDevice->TargetId = vstorPacket->StorageChannelProperties.TargetId; | |
471 | ||
472 | DPRINT_DBG(STORVSC, "channel flag 0x%x, max xfer len 0x%x", vstorPacket->StorageChannelProperties.Flags, vstorPacket->StorageChannelProperties.MaxTransferBytes); | |
473 | ||
474 | DPRINT_INFO(STORVSC, "END_INITIALIZATION_OPERATION..."); | |
475 | ||
476 | memset(vstorPacket, sizeof(VSTOR_PACKET), 0); | |
477 | vstorPacket->Operation = VStorOperationEndInitialization; | |
478 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
479 | ||
480 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
481 | vstorPacket, | |
482 | sizeof(VSTOR_PACKET), | |
483 | (ULONG_PTR)request, | |
484 | VmbusPacketTypeDataInBand, | |
485 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
486 | ||
487 | if ( ret != 0) | |
488 | { | |
489 | DPRINT_ERR(STORVSC, "unable to send END_INITIALIZATION_OPERATION"); | |
490 | goto Cleanup; | |
491 | } | |
492 | ||
493 | WaitEventWait(request->WaitEvent); | |
494 | ||
495 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
496 | { | |
497 | DPRINT_ERR(STORVSC, "END_INITIALIZATION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status); | |
498 | goto Cleanup; | |
499 | } | |
500 | ||
501 | DPRINT_INFO(STORVSC, "**** storage channel up and running!! ****"); | |
502 | ||
503 | Cleanup: | |
504 | if (request->WaitEvent) | |
505 | { | |
506 | WaitEventClose(request->WaitEvent); | |
507 | request->WaitEvent = NULL; | |
508 | } | |
509 | ||
510 | PutStorDevice(Device); | |
511 | ||
512 | DPRINT_EXIT(STORVSC); | |
513 | return ret; | |
514 | } | |
515 | ||
516 | ||
517 | int | |
518 | StorVscConnectToVsp( | |
519 | DEVICE_OBJECT *Device | |
520 | ) | |
521 | { | |
522 | int ret=0; | |
523 | VMSTORAGE_CHANNEL_PROPERTIES props; | |
524 | ||
525 | STORVSC_DRIVER_OBJECT *storDriver = (STORVSC_DRIVER_OBJECT*) Device->Driver;; | |
526 | ||
527 | memset(&props, sizeof(VMSTORAGE_CHANNEL_PROPERTIES), 0); | |
528 | ||
529 | // Open the channel | |
530 | ret = Device->Driver->VmbusChannelInterface.Open(Device, | |
531 | storDriver->RingBufferSize, | |
532 | storDriver->RingBufferSize, | |
8282c400 | 533 | (void *)&props, |
bef4a34a HJ |
534 | sizeof(VMSTORAGE_CHANNEL_PROPERTIES), |
535 | StorVscOnChannelCallback, | |
536 | Device | |
537 | ); | |
538 | ||
539 | DPRINT_DBG(STORVSC, "storage props: path id %d, tgt id %d, max xfer %d", props.PathId, props.TargetId, props.MaxTransferBytes); | |
540 | ||
541 | if (ret != 0) | |
542 | { | |
543 | DPRINT_ERR(STORVSC, "unable to open channel: %d", ret); | |
544 | return -1; | |
545 | } | |
546 | ||
547 | ret = StorVscChannelInit(Device); | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
552 | ||
553 | /*++ | |
554 | ||
555 | Name: | |
556 | StorVscOnDeviceRemove() | |
557 | ||
558 | Description: | |
559 | Callback when the our device is being removed | |
560 | ||
561 | --*/ | |
562 | int | |
563 | StorVscOnDeviceRemove( | |
564 | DEVICE_OBJECT *Device | |
565 | ) | |
566 | { | |
567 | STORVSC_DEVICE *storDevice; | |
568 | int ret=0; | |
569 | ||
570 | DPRINT_ENTER(STORVSC); | |
571 | ||
572 | DPRINT_INFO(STORVSC, "disabling storage device (%p)...", Device->Extension); | |
573 | ||
574 | storDevice = ReleaseStorDevice(Device); | |
575 | ||
576 | // At this point, all outbound traffic should be disable. We only allow inbound traffic (responses) to proceed | |
577 | // so that outstanding requests can be completed. | |
578 | while (storDevice->NumOutstandingRequests) | |
579 | { | |
580 | DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", storDevice->NumOutstandingRequests); | |
581 | ||
582 | Sleep(100); | |
583 | } | |
584 | ||
585 | DPRINT_INFO(STORVSC, "removing storage device (%p)...", Device->Extension); | |
586 | ||
587 | storDevice = FinalReleaseStorDevice(Device); | |
588 | ||
589 | DPRINT_INFO(STORVSC, "storage device (%p) safe to remove", storDevice); | |
590 | ||
591 | // Close the channel | |
592 | Device->Driver->VmbusChannelInterface.Close(Device); | |
593 | ||
594 | FreeStorDevice(storDevice); | |
595 | ||
596 | DPRINT_EXIT(STORVSC); | |
597 | return ret; | |
598 | } | |
599 | ||
600 | ||
601 | //static void | |
602 | //StorVscOnTargetRescan( | |
603 | // void *Context | |
604 | // ) | |
605 | //{ | |
606 | // DEVICE_OBJECT *device=(DEVICE_OBJECT*)Context; | |
607 | // STORVSC_DRIVER_OBJECT *storDriver; | |
608 | // | |
609 | // DPRINT_ENTER(STORVSC); | |
610 | // | |
611 | // storDriver = (STORVSC_DRIVER_OBJECT*) device->Driver; | |
612 | // storDriver->OnHostRescan(device); | |
613 | // | |
614 | // DPRINT_EXIT(STORVSC); | |
615 | //} | |
616 | ||
617 | int | |
618 | StorVscOnHostReset( | |
619 | DEVICE_OBJECT *Device | |
620 | ) | |
621 | { | |
622 | int ret=0; | |
623 | ||
624 | STORVSC_DEVICE *storDevice; | |
625 | STORVSC_REQUEST_EXTENSION *request; | |
626 | VSTOR_PACKET *vstorPacket; | |
627 | ||
628 | DPRINT_ENTER(STORVSC); | |
629 | ||
630 | DPRINT_INFO(STORVSC, "resetting host adapter..."); | |
631 | ||
632 | storDevice = GetStorDevice(Device); | |
633 | if (!storDevice) | |
634 | { | |
635 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
636 | DPRINT_EXIT(STORVSC); | |
637 | return -1; | |
638 | } | |
639 | ||
640 | request = &storDevice->ResetRequest; | |
641 | vstorPacket = &request->VStorPacket; | |
642 | ||
643 | request->WaitEvent = WaitEventCreate(); | |
644 | ||
645 | vstorPacket->Operation = VStorOperationResetBus; | |
646 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
647 | vstorPacket->VmSrb.PathId = storDevice->PathId; | |
648 | ||
649 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
650 | vstorPacket, | |
651 | sizeof(VSTOR_PACKET), | |
652 | (ULONG_PTR)&storDevice->ResetRequest, | |
653 | VmbusPacketTypeDataInBand, | |
654 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
655 | if (ret != 0) | |
656 | { | |
657 | DPRINT_ERR(STORVSC, "Unable to send reset packet %p ret %d", vstorPacket, ret); | |
658 | goto Cleanup; | |
659 | } | |
660 | ||
661 | // FIXME: Add a timeout | |
662 | WaitEventWait(request->WaitEvent); | |
663 | ||
664 | WaitEventClose(request->WaitEvent); | |
665 | DPRINT_INFO(STORVSC, "host adapter reset completed"); | |
666 | ||
667 | // At this point, all outstanding requests in the adapter should have been flushed out and return to us | |
668 | ||
669 | Cleanup: | |
670 | PutStorDevice(Device); | |
671 | DPRINT_EXIT(STORVSC); | |
672 | return ret; | |
673 | } | |
674 | ||
675 | /*++ | |
676 | ||
677 | Name: | |
678 | StorVscOnIORequest() | |
679 | ||
680 | Description: | |
681 | Callback to initiate an I/O request | |
682 | ||
683 | --*/ | |
684 | int | |
685 | StorVscOnIORequest( | |
686 | DEVICE_OBJECT *Device, | |
687 | STORVSC_REQUEST *Request | |
688 | ) | |
689 | { | |
690 | STORVSC_DEVICE *storDevice; | |
691 | STORVSC_REQUEST_EXTENSION* requestExtension = (STORVSC_REQUEST_EXTENSION*) Request->Extension; | |
692 | VSTOR_PACKET* vstorPacket =&requestExtension->VStorPacket; | |
693 | int ret=0; | |
694 | ||
695 | DPRINT_ENTER(STORVSC); | |
696 | ||
697 | storDevice = GetStorDevice(Device); | |
698 | ||
699 | DPRINT_DBG(STORVSC, "enter - Device %p, DeviceExt %p, Request %p, Extension %p", | |
700 | Device, storDevice, Request, requestExtension); | |
701 | ||
702 | DPRINT_DBG(STORVSC, "req %p len %d bus %d, target %d, lun %d cdblen %d", | |
703 | Request, Request->DataBuffer.Length, Request->Bus, Request->TargetId, Request->LunId, Request->CdbLen); | |
704 | ||
705 | if (!storDevice) | |
706 | { | |
707 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
708 | DPRINT_EXIT(STORVSC); | |
709 | return -2; | |
710 | } | |
711 | ||
712 | //PrintBytes(Request->Cdb, Request->CdbLen); | |
713 | ||
714 | requestExtension->Request = Request; | |
715 | requestExtension->Device = Device; | |
716 | ||
717 | memset(vstorPacket, 0 , sizeof(VSTOR_PACKET)); | |
718 | ||
719 | vstorPacket->Flags |= REQUEST_COMPLETION_FLAG; | |
720 | ||
721 | vstorPacket->VmSrb.Length = sizeof(VMSCSI_REQUEST); | |
722 | ||
723 | vstorPacket->VmSrb.PortNumber = Request->Host; | |
724 | vstorPacket->VmSrb.PathId = Request->Bus; | |
725 | vstorPacket->VmSrb.TargetId = Request->TargetId; | |
726 | vstorPacket->VmSrb.Lun = Request->LunId; | |
727 | ||
728 | vstorPacket->VmSrb.SenseInfoLength = SENSE_BUFFER_SIZE; | |
729 | ||
730 | // Copy over the scsi command descriptor block | |
731 | vstorPacket->VmSrb.CdbLength = Request->CdbLen; | |
732 | memcpy(&vstorPacket->VmSrb.Cdb, Request->Cdb, Request->CdbLen); | |
733 | ||
734 | vstorPacket->VmSrb.DataIn = Request->Type; | |
735 | vstorPacket->VmSrb.DataTransferLength = Request->DataBuffer.Length; | |
736 | ||
737 | vstorPacket->Operation = VStorOperationExecuteSRB; | |
738 | ||
739 | DPRINT_DBG(STORVSC, "srb - len %d port %d, path %d, target %d, lun %d senselen %d cdblen %d", | |
740 | vstorPacket->VmSrb.Length, | |
741 | vstorPacket->VmSrb.PortNumber, | |
742 | vstorPacket->VmSrb.PathId, | |
743 | vstorPacket->VmSrb.TargetId, | |
744 | vstorPacket->VmSrb.Lun, | |
745 | vstorPacket->VmSrb.SenseInfoLength, | |
746 | vstorPacket->VmSrb.CdbLength); | |
747 | ||
748 | if (requestExtension->Request->DataBuffer.Length) | |
749 | { | |
750 | ret = Device->Driver->VmbusChannelInterface.SendPacketMultiPageBuffer(Device, | |
751 | &requestExtension->Request->DataBuffer, | |
752 | vstorPacket, | |
753 | sizeof(VSTOR_PACKET), | |
754 | (ULONG_PTR)requestExtension); | |
755 | } | |
756 | else | |
757 | { | |
758 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
759 | vstorPacket, | |
760 | sizeof(VSTOR_PACKET), | |
761 | (ULONG_PTR)requestExtension, | |
762 | VmbusPacketTypeDataInBand, | |
763 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
764 | } | |
765 | ||
766 | if (ret != 0) | |
767 | { | |
768 | DPRINT_DBG(STORVSC, "Unable to send packet %p ret %d", vstorPacket, ret); | |
769 | } | |
770 | ||
771 | InterlockedIncrement(&storDevice->NumOutstandingRequests); | |
772 | ||
773 | PutStorDevice(Device); | |
774 | ||
775 | DPRINT_EXIT(STORVSC); | |
776 | return ret; | |
777 | } | |
778 | ||
779 | /*++ | |
780 | ||
781 | Name: | |
782 | StorVscOnCleanup() | |
783 | ||
784 | Description: | |
785 | Perform any cleanup when the driver is removed | |
786 | ||
787 | --*/ | |
788 | void | |
789 | StorVscOnCleanup( | |
790 | DRIVER_OBJECT *Driver | |
791 | ) | |
792 | { | |
793 | DPRINT_ENTER(STORVSC); | |
794 | DPRINT_EXIT(STORVSC); | |
795 | } | |
796 | ||
797 | ||
798 | static void | |
799 | StorVscOnIOCompletion( | |
800 | DEVICE_OBJECT *Device, | |
801 | VSTOR_PACKET *VStorPacket, | |
802 | STORVSC_REQUEST_EXTENSION *RequestExt | |
803 | ) | |
804 | { | |
805 | STORVSC_REQUEST *request; | |
806 | STORVSC_DEVICE *storDevice; | |
807 | ||
808 | DPRINT_ENTER(STORVSC); | |
809 | ||
810 | storDevice = MustGetStorDevice(Device); | |
811 | if (!storDevice) | |
812 | { | |
813 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
814 | DPRINT_EXIT(STORVSC); | |
815 | return; | |
816 | } | |
817 | ||
818 | DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION - request extension %p completed bytes xfer %u", | |
819 | RequestExt, VStorPacket->VmSrb.DataTransferLength); | |
820 | ||
821 | ASSERT(RequestExt != NULL); | |
822 | ASSERT(RequestExt->Request != NULL); | |
823 | ||
824 | request = RequestExt->Request; | |
825 | ||
826 | ASSERT(request->OnIOCompletion != NULL); | |
827 | ||
828 | // Copy over the status...etc | |
829 | request->Status = VStorPacket->VmSrb.ScsiStatus; | |
830 | ||
831 | if (request->Status != 0 || VStorPacket->VmSrb.SrbStatus != 1) | |
832 | { | |
833 | DPRINT_WARN(STORVSC, "cmd 0x%x scsi status 0x%x srb status 0x%x\n", | |
834 | request->Cdb[0], | |
835 | VStorPacket->VmSrb.ScsiStatus, | |
836 | VStorPacket->VmSrb.SrbStatus); | |
837 | } | |
838 | ||
839 | if ((request->Status & 0xFF) == 0x02) // CHECK_CONDITION | |
840 | { | |
841 | if (VStorPacket->VmSrb.SrbStatus & 0x80) // autosense data available | |
842 | { | |
843 | DPRINT_WARN(STORVSC, "storvsc pkt %p autosense data valid - len %d\n", | |
844 | RequestExt, VStorPacket->VmSrb.SenseInfoLength); | |
845 | ||
846 | ASSERT(VStorPacket->VmSrb.SenseInfoLength <= request->SenseBufferSize); | |
847 | memcpy(request->SenseBuffer, | |
848 | VStorPacket->VmSrb.SenseData, | |
849 | VStorPacket->VmSrb.SenseInfoLength); | |
850 | ||
851 | request->SenseBufferSize = VStorPacket->VmSrb.SenseInfoLength; | |
852 | } | |
853 | } | |
854 | ||
855 | // TODO: | |
856 | request->BytesXfer = VStorPacket->VmSrb.DataTransferLength; | |
857 | ||
858 | request->OnIOCompletion(request); | |
859 | ||
860 | InterlockedDecrement(&storDevice->NumOutstandingRequests); | |
861 | ||
862 | PutStorDevice(Device); | |
863 | ||
864 | DPRINT_EXIT(STORVSC); | |
865 | } | |
866 | ||
867 | ||
868 | static void | |
869 | StorVscOnReceive( | |
870 | DEVICE_OBJECT *Device, | |
871 | VSTOR_PACKET *VStorPacket, | |
872 | STORVSC_REQUEST_EXTENSION *RequestExt | |
873 | ) | |
874 | { | |
875 | switch(VStorPacket->Operation) | |
876 | { | |
877 | case VStorOperationCompleteIo: | |
878 | ||
879 | DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION"); | |
880 | StorVscOnIOCompletion(Device, VStorPacket, RequestExt); | |
881 | break; | |
882 | ||
883 | //case ENUMERATE_DEVICE_OPERATION: | |
884 | ||
885 | // DPRINT_INFO(STORVSC, "ENUMERATE_DEVICE_OPERATION"); | |
886 | ||
887 | // StorVscOnTargetRescan(Device); | |
888 | // break; | |
889 | ||
890 | case VStorOperationRemoveDevice: | |
891 | ||
892 | DPRINT_INFO(STORVSC, "REMOVE_DEVICE_OPERATION"); | |
893 | // TODO: | |
894 | break; | |
895 | ||
896 | default: | |
897 | DPRINT_INFO(STORVSC, "Unknown operation received - %d", VStorPacket->Operation); | |
898 | break; | |
899 | } | |
900 | } | |
901 | ||
902 | void | |
903 | StorVscOnChannelCallback( | |
8282c400 | 904 | void * Context |
bef4a34a HJ |
905 | ) |
906 | { | |
907 | int ret=0; | |
908 | DEVICE_OBJECT *device = (DEVICE_OBJECT*)Context; | |
909 | STORVSC_DEVICE *storDevice; | |
910 | UINT32 bytesRecvd; | |
911 | UINT64 requestId; | |
912 | UCHAR packet[ALIGN_UP(sizeof(VSTOR_PACKET),8)]; | |
913 | STORVSC_REQUEST_EXTENSION *request; | |
914 | ||
915 | DPRINT_ENTER(STORVSC); | |
916 | ||
917 | ASSERT(device); | |
918 | ||
919 | storDevice = MustGetStorDevice(device); | |
920 | if (!storDevice) | |
921 | { | |
922 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
923 | DPRINT_EXIT(STORVSC); | |
924 | return; | |
925 | } | |
926 | ||
927 | do | |
928 | { | |
929 | ret = device->Driver->VmbusChannelInterface.RecvPacket(device, | |
930 | packet, | |
931 | ALIGN_UP(sizeof(VSTOR_PACKET),8), | |
932 | &bytesRecvd, | |
933 | &requestId); | |
934 | if (ret == 0 && bytesRecvd > 0) | |
935 | { | |
936 | DPRINT_DBG(STORVSC, "receive %d bytes - tid %llx", bytesRecvd, requestId); | |
937 | ||
938 | //ASSERT(bytesRecvd == sizeof(VSTOR_PACKET)); | |
939 | ||
940 | request = (STORVSC_REQUEST_EXTENSION*)(ULONG_PTR)requestId; | |
941 | ASSERT(request); | |
942 | ||
943 | //if (vstorPacket.Flags & SYNTHETIC_FLAG) | |
944 | if ((request == &storDevice->InitRequest) || (request == &storDevice->ResetRequest)) | |
945 | { | |
946 | //DPRINT_INFO(STORVSC, "reset completion - operation %u status %u", vstorPacket.Operation, vstorPacket.Status); | |
947 | ||
948 | memcpy(&request->VStorPacket, packet, sizeof(VSTOR_PACKET)); | |
949 | ||
950 | WaitEventSet(request->WaitEvent); | |
951 | } | |
952 | else | |
953 | { | |
954 | StorVscOnReceive(device, (VSTOR_PACKET*)packet, request); | |
955 | } | |
956 | } | |
957 | else | |
958 | { | |
959 | //DPRINT_DBG(STORVSC, "nothing else to read..."); | |
960 | break; | |
961 | } | |
962 | } while (1); | |
963 | ||
964 | PutStorDevice(device); | |
965 | ||
966 | DPRINT_EXIT(STORVSC); | |
967 | return; | |
968 | } |