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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 | ||
5654e932 | 24 | #include <linux/kernel.h> |
0ffa63b0 GKH |
25 | #include <linux/string.h> |
26 | #include <linux/mm.h> | |
b4362c9c | 27 | #include <linux/delay.h> |
97f4ee3d | 28 | #include "include/logging.h" |
bef4a34a | 29 | |
97f4ee3d GKH |
30 | #include "include/StorVscApi.h" |
31 | #include "include/VmbusPacketFormat.h" | |
32 | #include "include/vstorage.h" | |
bef4a34a HJ |
33 | |
34 | ||
35 | // | |
36 | // #defines | |
37 | // | |
38 | ||
39 | // | |
40 | // Data types | |
41 | // | |
42 | ||
43 | typedef struct _STORVSC_REQUEST_EXTENSION { | |
44 | //LIST_ENTRY ListEntry; | |
45 | ||
46 | STORVSC_REQUEST *Request; | |
47 | DEVICE_OBJECT *Device; | |
48 | ||
49 | // Synchronize the request/response if needed | |
50 | HANDLE WaitEvent; | |
51 | ||
52 | VSTOR_PACKET VStorPacket; | |
53 | } STORVSC_REQUEST_EXTENSION; | |
54 | ||
55 | ||
56 | // A storvsc device is a device object that contains a vmbus channel | |
57 | typedef struct _STORVSC_DEVICE{ | |
58 | DEVICE_OBJECT *Device; | |
59 | ||
60 | int RefCount; // 0 indicates the device is being destroyed | |
61 | ||
62 | int NumOutstandingRequests; | |
63 | ||
64 | // Each unique Port/Path/Target represents 1 channel ie scsi controller. In reality, the pathid, targetid is always 0 | |
65 | // and the port is set by us | |
3abcbc45 | 66 | unsigned int PortNumber; |
59471438 GKH |
67 | unsigned char PathId; |
68 | unsigned char TargetId; | |
bef4a34a HJ |
69 | |
70 | //LIST_ENTRY OutstandingRequestList; | |
71 | //HANDLE OutstandingRequestLock; | |
72 | ||
73 | // Used for vsc/vsp channel reset process | |
74 | STORVSC_REQUEST_EXTENSION InitRequest; | |
75 | ||
76 | STORVSC_REQUEST_EXTENSION ResetRequest; | |
77 | ||
78 | } STORVSC_DEVICE; | |
79 | ||
80 | ||
81 | // | |
82 | // Globals | |
83 | // | |
84 | static const char* gDriverName="storvsc"; | |
85 | ||
86 | //{ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} | |
87 | static const GUID gStorVscDeviceType={ | |
88 | .Data = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f} | |
89 | }; | |
90 | ||
91 | // | |
92 | // Internal routines | |
93 | // | |
94 | static int | |
95 | StorVscOnDeviceAdd( | |
96 | DEVICE_OBJECT *Device, | |
97 | void *AdditionalInfo | |
98 | ); | |
99 | ||
100 | static int | |
101 | StorVscOnDeviceRemove( | |
102 | DEVICE_OBJECT *Device | |
103 | ); | |
104 | ||
105 | static int | |
106 | StorVscOnIORequest( | |
107 | DEVICE_OBJECT *Device, | |
108 | STORVSC_REQUEST *Request | |
109 | ); | |
110 | ||
111 | static int | |
112 | StorVscOnHostReset( | |
113 | DEVICE_OBJECT *Device | |
114 | ); | |
115 | ||
116 | static void | |
117 | StorVscOnCleanup( | |
118 | DRIVER_OBJECT *Device | |
119 | ); | |
120 | ||
121 | static void | |
122 | StorVscOnChannelCallback( | |
8282c400 | 123 | void * Context |
bef4a34a HJ |
124 | ); |
125 | ||
126 | static void | |
127 | StorVscOnIOCompletion( | |
128 | DEVICE_OBJECT *Device, | |
129 | VSTOR_PACKET *VStorPacket, | |
130 | STORVSC_REQUEST_EXTENSION *RequestExt | |
131 | ); | |
132 | ||
133 | static void | |
134 | StorVscOnReceive( | |
135 | DEVICE_OBJECT *Device, | |
136 | VSTOR_PACKET *VStorPacket, | |
137 | STORVSC_REQUEST_EXTENSION *RequestExt | |
138 | ); | |
139 | ||
140 | static int | |
141 | StorVscConnectToVsp( | |
142 | DEVICE_OBJECT *Device | |
143 | ); | |
144 | ||
145 | static inline STORVSC_DEVICE* AllocStorDevice(DEVICE_OBJECT *Device) | |
146 | { | |
147 | STORVSC_DEVICE *storDevice; | |
148 | ||
e276a3a5 | 149 | storDevice = kzalloc(sizeof(STORVSC_DEVICE), GFP_KERNEL); |
bef4a34a HJ |
150 | if (!storDevice) |
151 | return NULL; | |
152 | ||
153 | // Set to 2 to allow both inbound and outbound traffics | |
154 | // (ie GetStorDevice() and MustGetStorDevice()) to proceed. | |
155 | InterlockedCompareExchange(&storDevice->RefCount, 2, 0); | |
156 | ||
157 | storDevice->Device = Device; | |
158 | Device->Extension = storDevice; | |
159 | ||
160 | return storDevice; | |
161 | } | |
162 | ||
163 | static inline void FreeStorDevice(STORVSC_DEVICE *Device) | |
164 | { | |
165 | ASSERT(Device->RefCount == 0); | |
8c69f52a | 166 | kfree(Device); |
bef4a34a HJ |
167 | } |
168 | ||
169 | // Get the stordevice object iff exists and its refcount > 1 | |
170 | static inline STORVSC_DEVICE* GetStorDevice(DEVICE_OBJECT *Device) | |
171 | { | |
172 | STORVSC_DEVICE *storDevice; | |
173 | ||
174 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
175 | if (storDevice && storDevice->RefCount > 1) | |
176 | { | |
177 | InterlockedIncrement(&storDevice->RefCount); | |
178 | } | |
179 | else | |
180 | { | |
181 | storDevice = NULL; | |
182 | } | |
183 | ||
184 | return storDevice; | |
185 | } | |
186 | ||
187 | // Get the stordevice object iff exists and its refcount > 0 | |
188 | static inline STORVSC_DEVICE* MustGetStorDevice(DEVICE_OBJECT *Device) | |
189 | { | |
190 | STORVSC_DEVICE *storDevice; | |
191 | ||
192 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
193 | if (storDevice && storDevice->RefCount) | |
194 | { | |
195 | InterlockedIncrement(&storDevice->RefCount); | |
196 | } | |
197 | else | |
198 | { | |
199 | storDevice = NULL; | |
200 | } | |
201 | ||
202 | return storDevice; | |
203 | } | |
204 | ||
205 | static inline void PutStorDevice(DEVICE_OBJECT *Device) | |
206 | { | |
207 | STORVSC_DEVICE *storDevice; | |
208 | ||
209 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
210 | ASSERT(storDevice); | |
211 | ||
212 | InterlockedDecrement(&storDevice->RefCount); | |
213 | ASSERT(storDevice->RefCount); | |
214 | } | |
215 | ||
216 | // Drop ref count to 1 to effectively disable GetStorDevice() | |
217 | static inline STORVSC_DEVICE* ReleaseStorDevice(DEVICE_OBJECT *Device) | |
218 | { | |
219 | STORVSC_DEVICE *storDevice; | |
220 | ||
221 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
222 | ASSERT(storDevice); | |
223 | ||
224 | // Busy wait until the ref drop to 2, then set it to 1 | |
225 | while (InterlockedCompareExchange(&storDevice->RefCount, 1, 2) != 2) | |
226 | { | |
b4362c9c | 227 | udelay(100); |
bef4a34a HJ |
228 | } |
229 | ||
230 | return storDevice; | |
231 | } | |
232 | ||
233 | // Drop ref count to 0. No one can use StorDevice object. | |
234 | static inline STORVSC_DEVICE* FinalReleaseStorDevice(DEVICE_OBJECT *Device) | |
235 | { | |
236 | STORVSC_DEVICE *storDevice; | |
237 | ||
238 | storDevice = (STORVSC_DEVICE*)Device->Extension; | |
239 | ASSERT(storDevice); | |
240 | ||
241 | // Busy wait until the ref drop to 1, then set it to 0 | |
242 | while (InterlockedCompareExchange(&storDevice->RefCount, 0, 1) != 1) | |
243 | { | |
b4362c9c | 244 | udelay(100); |
bef4a34a HJ |
245 | } |
246 | ||
247 | Device->Extension = NULL; | |
248 | return storDevice; | |
249 | } | |
250 | ||
251 | /*++; | |
252 | ||
253 | ||
254 | Name: | |
255 | StorVscInitialize() | |
256 | ||
257 | Description: | |
258 | Main entry point | |
259 | ||
260 | --*/ | |
261 | int | |
262 | StorVscInitialize( | |
263 | DRIVER_OBJECT *Driver | |
264 | ) | |
265 | { | |
266 | STORVSC_DRIVER_OBJECT* storDriver = (STORVSC_DRIVER_OBJECT*)Driver; | |
267 | int ret=0; | |
268 | ||
269 | DPRINT_ENTER(STORVSC); | |
270 | ||
271 | DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%d sizeof(STORVSC_REQUEST_EXTENSION)=%d sizeof(VSTOR_PACKET)=%d, sizeof(VMSCSI_REQUEST)=%d", | |
272 | sizeof(STORVSC_REQUEST), sizeof(STORVSC_REQUEST_EXTENSION), sizeof(VSTOR_PACKET), sizeof(VMSCSI_REQUEST)); | |
273 | ||
274 | // Make sure we are at least 2 pages since 1 page is used for control | |
275 | ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1)); | |
276 | ||
277 | Driver->name = gDriverName; | |
278 | memcpy(&Driver->deviceType, &gStorVscDeviceType, sizeof(GUID)); | |
279 | ||
280 | storDriver->RequestExtSize = sizeof(STORVSC_REQUEST_EXTENSION); | |
281 | ||
282 | // 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) | |
59471438 | 283 | // by the max request size (which is VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER + VSTOR_PACKET + u64) |
bef4a34a | 284 | storDriver->MaxOutstandingRequestsPerChannel = |
59471438 | 285 | ((storDriver->RingBufferSize - PAGE_SIZE) / ALIGN_UP(MAX_MULTIPAGE_BUFFER_PACKET + sizeof(VSTOR_PACKET) + sizeof(u64),sizeof(u64))); |
bef4a34a HJ |
286 | |
287 | DPRINT_INFO(STORVSC, "max io %u, currently %u\n", storDriver->MaxOutstandingRequestsPerChannel, STORVSC_MAX_IO_REQUESTS); | |
288 | ||
289 | // Setup the dispatch table | |
290 | storDriver->Base.OnDeviceAdd = StorVscOnDeviceAdd; | |
291 | storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove; | |
292 | storDriver->Base.OnCleanup = StorVscOnCleanup; | |
293 | ||
294 | storDriver->OnIORequest = StorVscOnIORequest; | |
295 | storDriver->OnHostReset = StorVscOnHostReset; | |
296 | ||
297 | DPRINT_EXIT(STORVSC); | |
298 | ||
299 | return ret; | |
300 | } | |
301 | ||
302 | /*++ | |
303 | ||
304 | Name: | |
305 | StorVscOnDeviceAdd() | |
306 | ||
307 | Description: | |
308 | Callback when the device belonging to this driver is added | |
309 | ||
310 | --*/ | |
311 | int | |
312 | StorVscOnDeviceAdd( | |
313 | DEVICE_OBJECT *Device, | |
314 | void *AdditionalInfo | |
315 | ) | |
316 | { | |
317 | int ret=0; | |
318 | STORVSC_DEVICE *storDevice; | |
319 | //VMSTORAGE_CHANNEL_PROPERTIES *props; | |
320 | STORVSC_DEVICE_INFO *deviceInfo = (STORVSC_DEVICE_INFO*)AdditionalInfo; | |
321 | ||
322 | DPRINT_ENTER(STORVSC); | |
323 | ||
324 | storDevice = AllocStorDevice(Device); | |
325 | if (!storDevice) | |
326 | { | |
327 | ret = -1; | |
328 | goto Cleanup; | |
329 | } | |
330 | ||
331 | // Save the channel properties to our storvsc channel | |
332 | //props = (VMSTORAGE_CHANNEL_PROPERTIES*) channel->offerMsg.Offer.u.Standard.UserDefined; | |
333 | ||
334 | // FIXME: | |
335 | // If we support more than 1 scsi channel, we need to set the port number here | |
336 | // to the scsi channel but how do we get the scsi channel prior to the bus scan | |
337 | /*storChannel->PortNumber = 0; | |
338 | storChannel->PathId = props->PathId; | |
339 | storChannel->TargetId = props->TargetId;*/ | |
340 | ||
341 | storDevice->PortNumber = deviceInfo->PortNumber; | |
342 | // Send it back up | |
343 | ret = StorVscConnectToVsp(Device); | |
344 | ||
345 | //deviceInfo->PortNumber = storDevice->PortNumber; | |
346 | deviceInfo->PathId = storDevice->PathId; | |
347 | deviceInfo->TargetId = storDevice->TargetId; | |
348 | ||
2701f686 | 349 | DPRINT_DBG(STORVSC, "assigned port %lu, path %u target %u\n", storDevice->PortNumber, storDevice->PathId, storDevice->TargetId); |
bef4a34a HJ |
350 | |
351 | Cleanup: | |
352 | DPRINT_EXIT(STORVSC); | |
353 | ||
354 | return ret; | |
355 | } | |
356 | ||
357 | static int StorVscChannelInit(DEVICE_OBJECT *Device) | |
358 | { | |
359 | int ret=0; | |
360 | STORVSC_DEVICE *storDevice; | |
361 | STORVSC_REQUEST_EXTENSION *request; | |
362 | VSTOR_PACKET *vstorPacket; | |
363 | ||
364 | storDevice = GetStorDevice(Device); | |
365 | if (!storDevice) | |
366 | { | |
367 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
368 | DPRINT_EXIT(STORVSC); | |
369 | return -1; | |
370 | } | |
371 | ||
372 | request = &storDevice->InitRequest; | |
373 | vstorPacket = &request->VStorPacket; | |
374 | ||
375 | // Now, initiate the vsc/vsp initialization protocol on the open channel | |
376 | ||
377 | memset(request, sizeof(STORVSC_REQUEST_EXTENSION), 0); | |
378 | request->WaitEvent = WaitEventCreate(); | |
379 | ||
380 | vstorPacket->Operation = VStorOperationBeginInitialization; | |
381 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
382 | ||
383 | /*SpinlockAcquire(gDriverExt.packetListLock); | |
384 | INSERT_TAIL_LIST(&gDriverExt.packetList, &packet->listEntry.entry); | |
385 | SpinlockRelease(gDriverExt.packetListLock);*/ | |
386 | ||
387 | DPRINT_INFO(STORVSC, "BEGIN_INITIALIZATION_OPERATION..."); | |
388 | ||
389 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
390 | vstorPacket, | |
391 | sizeof(VSTOR_PACKET), | |
c4b0bc94 | 392 | (unsigned long)request, |
bef4a34a HJ |
393 | VmbusPacketTypeDataInBand, |
394 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
395 | if ( ret != 0) | |
396 | { | |
397 | DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION"); | |
398 | goto Cleanup; | |
399 | } | |
400 | ||
401 | WaitEventWait(request->WaitEvent); | |
402 | ||
403 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
404 | { | |
2701f686 | 405 | DPRINT_ERR(STORVSC, "BEGIN_INITIALIZATION_OPERATION failed (op %d status 0x%lx)", vstorPacket->Operation, vstorPacket->Status); |
bef4a34a HJ |
406 | goto Cleanup; |
407 | } | |
408 | ||
409 | DPRINT_INFO(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION..."); | |
410 | ||
411 | // reuse the packet for version range supported | |
412 | memset(vstorPacket, sizeof(VSTOR_PACKET), 0); | |
413 | vstorPacket->Operation = VStorOperationQueryProtocolVersion; | |
414 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
415 | ||
416 | vstorPacket->Version.MajorMinor = VMSTOR_PROTOCOL_VERSION_CURRENT; | |
417 | FILL_VMSTOR_REVISION(vstorPacket->Version.Revision); | |
418 | ||
419 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
420 | vstorPacket, | |
421 | sizeof(VSTOR_PACKET), | |
c4b0bc94 | 422 | (unsigned long)request, |
bef4a34a HJ |
423 | VmbusPacketTypeDataInBand, |
424 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
425 | if ( ret != 0) | |
426 | { | |
427 | DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION"); | |
428 | goto Cleanup; | |
429 | } | |
430 | ||
431 | WaitEventWait(request->WaitEvent); | |
432 | ||
433 | // TODO: Check returned version | |
434 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
435 | { | |
2701f686 | 436 | DPRINT_ERR(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION failed (op %d status 0x%lx)", vstorPacket->Operation, vstorPacket->Status); |
bef4a34a HJ |
437 | goto Cleanup; |
438 | } | |
439 | ||
440 | // Query channel properties | |
441 | DPRINT_INFO(STORVSC, "QUERY_PROPERTIES_OPERATION..."); | |
442 | ||
443 | memset(vstorPacket, sizeof(VSTOR_PACKET), 0); | |
444 | vstorPacket->Operation = VStorOperationQueryProperties; | |
445 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
446 | vstorPacket->StorageChannelProperties.PortNumber = storDevice->PortNumber; | |
447 | ||
448 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
449 | vstorPacket, | |
450 | sizeof(VSTOR_PACKET), | |
c4b0bc94 | 451 | (unsigned long)request, |
bef4a34a HJ |
452 | VmbusPacketTypeDataInBand, |
453 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
454 | ||
455 | if ( ret != 0) | |
456 | { | |
457 | DPRINT_ERR(STORVSC, "unable to send QUERY_PROPERTIES_OPERATION"); | |
458 | goto Cleanup; | |
459 | } | |
460 | ||
461 | WaitEventWait(request->WaitEvent); | |
462 | ||
463 | // TODO: Check returned version | |
464 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
465 | { | |
2701f686 | 466 | DPRINT_ERR(STORVSC, "QUERY_PROPERTIES_OPERATION failed (op %d status 0x%lx)", vstorPacket->Operation, vstorPacket->Status); |
bef4a34a HJ |
467 | goto Cleanup; |
468 | } | |
469 | ||
470 | //storDevice->PortNumber = vstorPacket->StorageChannelProperties.PortNumber; | |
471 | storDevice->PathId = vstorPacket->StorageChannelProperties.PathId; | |
472 | storDevice->TargetId = vstorPacket->StorageChannelProperties.TargetId; | |
473 | ||
2701f686 | 474 | DPRINT_DBG(STORVSC, "channel flag 0x%lx, max xfer len 0x%lx", vstorPacket->StorageChannelProperties.Flags, vstorPacket->StorageChannelProperties.MaxTransferBytes); |
bef4a34a HJ |
475 | |
476 | DPRINT_INFO(STORVSC, "END_INITIALIZATION_OPERATION..."); | |
477 | ||
478 | memset(vstorPacket, sizeof(VSTOR_PACKET), 0); | |
479 | vstorPacket->Operation = VStorOperationEndInitialization; | |
480 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
481 | ||
482 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
483 | vstorPacket, | |
484 | sizeof(VSTOR_PACKET), | |
c4b0bc94 | 485 | (unsigned long)request, |
bef4a34a HJ |
486 | VmbusPacketTypeDataInBand, |
487 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
488 | ||
489 | if ( ret != 0) | |
490 | { | |
491 | DPRINT_ERR(STORVSC, "unable to send END_INITIALIZATION_OPERATION"); | |
492 | goto Cleanup; | |
493 | } | |
494 | ||
495 | WaitEventWait(request->WaitEvent); | |
496 | ||
497 | if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0) | |
498 | { | |
2701f686 | 499 | DPRINT_ERR(STORVSC, "END_INITIALIZATION_OPERATION failed (op %d status 0x%lx)", vstorPacket->Operation, vstorPacket->Status); |
bef4a34a HJ |
500 | goto Cleanup; |
501 | } | |
502 | ||
503 | DPRINT_INFO(STORVSC, "**** storage channel up and running!! ****"); | |
504 | ||
505 | Cleanup: | |
506 | if (request->WaitEvent) | |
507 | { | |
508 | WaitEventClose(request->WaitEvent); | |
509 | request->WaitEvent = NULL; | |
510 | } | |
511 | ||
512 | PutStorDevice(Device); | |
513 | ||
514 | DPRINT_EXIT(STORVSC); | |
515 | return ret; | |
516 | } | |
517 | ||
518 | ||
519 | int | |
520 | StorVscConnectToVsp( | |
521 | DEVICE_OBJECT *Device | |
522 | ) | |
523 | { | |
524 | int ret=0; | |
525 | VMSTORAGE_CHANNEL_PROPERTIES props; | |
526 | ||
527 | STORVSC_DRIVER_OBJECT *storDriver = (STORVSC_DRIVER_OBJECT*) Device->Driver;; | |
528 | ||
529 | memset(&props, sizeof(VMSTORAGE_CHANNEL_PROPERTIES), 0); | |
530 | ||
531 | // Open the channel | |
532 | ret = Device->Driver->VmbusChannelInterface.Open(Device, | |
533 | storDriver->RingBufferSize, | |
534 | storDriver->RingBufferSize, | |
8282c400 | 535 | (void *)&props, |
bef4a34a HJ |
536 | sizeof(VMSTORAGE_CHANNEL_PROPERTIES), |
537 | StorVscOnChannelCallback, | |
538 | Device | |
539 | ); | |
540 | ||
2701f686 | 541 | DPRINT_DBG(STORVSC, "storage props: path id %d, tgt id %d, max xfer %ld", props.PathId, props.TargetId, props.MaxTransferBytes); |
bef4a34a HJ |
542 | |
543 | if (ret != 0) | |
544 | { | |
545 | DPRINT_ERR(STORVSC, "unable to open channel: %d", ret); | |
546 | return -1; | |
547 | } | |
548 | ||
549 | ret = StorVscChannelInit(Device); | |
550 | ||
551 | return ret; | |
552 | } | |
553 | ||
554 | ||
555 | /*++ | |
556 | ||
557 | Name: | |
558 | StorVscOnDeviceRemove() | |
559 | ||
560 | Description: | |
561 | Callback when the our device is being removed | |
562 | ||
563 | --*/ | |
564 | int | |
565 | StorVscOnDeviceRemove( | |
566 | DEVICE_OBJECT *Device | |
567 | ) | |
568 | { | |
569 | STORVSC_DEVICE *storDevice; | |
570 | int ret=0; | |
571 | ||
572 | DPRINT_ENTER(STORVSC); | |
573 | ||
574 | DPRINT_INFO(STORVSC, "disabling storage device (%p)...", Device->Extension); | |
575 | ||
576 | storDevice = ReleaseStorDevice(Device); | |
577 | ||
578 | // At this point, all outbound traffic should be disable. We only allow inbound traffic (responses) to proceed | |
579 | // so that outstanding requests can be completed. | |
580 | while (storDevice->NumOutstandingRequests) | |
581 | { | |
582 | DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", storDevice->NumOutstandingRequests); | |
583 | ||
b4362c9c | 584 | udelay(100); |
bef4a34a HJ |
585 | } |
586 | ||
587 | DPRINT_INFO(STORVSC, "removing storage device (%p)...", Device->Extension); | |
588 | ||
589 | storDevice = FinalReleaseStorDevice(Device); | |
590 | ||
591 | DPRINT_INFO(STORVSC, "storage device (%p) safe to remove", storDevice); | |
592 | ||
593 | // Close the channel | |
594 | Device->Driver->VmbusChannelInterface.Close(Device); | |
595 | ||
596 | FreeStorDevice(storDevice); | |
597 | ||
598 | DPRINT_EXIT(STORVSC); | |
599 | return ret; | |
600 | } | |
601 | ||
602 | ||
603 | //static void | |
604 | //StorVscOnTargetRescan( | |
605 | // void *Context | |
606 | // ) | |
607 | //{ | |
608 | // DEVICE_OBJECT *device=(DEVICE_OBJECT*)Context; | |
609 | // STORVSC_DRIVER_OBJECT *storDriver; | |
610 | // | |
611 | // DPRINT_ENTER(STORVSC); | |
612 | // | |
613 | // storDriver = (STORVSC_DRIVER_OBJECT*) device->Driver; | |
614 | // storDriver->OnHostRescan(device); | |
615 | // | |
616 | // DPRINT_EXIT(STORVSC); | |
617 | //} | |
618 | ||
619 | int | |
620 | StorVscOnHostReset( | |
621 | DEVICE_OBJECT *Device | |
622 | ) | |
623 | { | |
624 | int ret=0; | |
625 | ||
626 | STORVSC_DEVICE *storDevice; | |
627 | STORVSC_REQUEST_EXTENSION *request; | |
628 | VSTOR_PACKET *vstorPacket; | |
629 | ||
630 | DPRINT_ENTER(STORVSC); | |
631 | ||
632 | DPRINT_INFO(STORVSC, "resetting host adapter..."); | |
633 | ||
634 | storDevice = GetStorDevice(Device); | |
635 | if (!storDevice) | |
636 | { | |
637 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
638 | DPRINT_EXIT(STORVSC); | |
639 | return -1; | |
640 | } | |
641 | ||
642 | request = &storDevice->ResetRequest; | |
643 | vstorPacket = &request->VStorPacket; | |
644 | ||
645 | request->WaitEvent = WaitEventCreate(); | |
646 | ||
647 | vstorPacket->Operation = VStorOperationResetBus; | |
648 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
649 | vstorPacket->VmSrb.PathId = storDevice->PathId; | |
650 | ||
651 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
652 | vstorPacket, | |
653 | sizeof(VSTOR_PACKET), | |
c4b0bc94 | 654 | (unsigned long)&storDevice->ResetRequest, |
bef4a34a HJ |
655 | VmbusPacketTypeDataInBand, |
656 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
657 | if (ret != 0) | |
658 | { | |
659 | DPRINT_ERR(STORVSC, "Unable to send reset packet %p ret %d", vstorPacket, ret); | |
660 | goto Cleanup; | |
661 | } | |
662 | ||
663 | // FIXME: Add a timeout | |
664 | WaitEventWait(request->WaitEvent); | |
665 | ||
666 | WaitEventClose(request->WaitEvent); | |
667 | DPRINT_INFO(STORVSC, "host adapter reset completed"); | |
668 | ||
669 | // At this point, all outstanding requests in the adapter should have been flushed out and return to us | |
670 | ||
671 | Cleanup: | |
672 | PutStorDevice(Device); | |
673 | DPRINT_EXIT(STORVSC); | |
674 | return ret; | |
675 | } | |
676 | ||
677 | /*++ | |
678 | ||
679 | Name: | |
680 | StorVscOnIORequest() | |
681 | ||
682 | Description: | |
683 | Callback to initiate an I/O request | |
684 | ||
685 | --*/ | |
686 | int | |
687 | StorVscOnIORequest( | |
688 | DEVICE_OBJECT *Device, | |
689 | STORVSC_REQUEST *Request | |
690 | ) | |
691 | { | |
692 | STORVSC_DEVICE *storDevice; | |
693 | STORVSC_REQUEST_EXTENSION* requestExtension = (STORVSC_REQUEST_EXTENSION*) Request->Extension; | |
694 | VSTOR_PACKET* vstorPacket =&requestExtension->VStorPacket; | |
695 | int ret=0; | |
696 | ||
697 | DPRINT_ENTER(STORVSC); | |
698 | ||
699 | storDevice = GetStorDevice(Device); | |
700 | ||
701 | DPRINT_DBG(STORVSC, "enter - Device %p, DeviceExt %p, Request %p, Extension %p", | |
702 | Device, storDevice, Request, requestExtension); | |
703 | ||
704 | DPRINT_DBG(STORVSC, "req %p len %d bus %d, target %d, lun %d cdblen %d", | |
705 | Request, Request->DataBuffer.Length, Request->Bus, Request->TargetId, Request->LunId, Request->CdbLen); | |
706 | ||
707 | if (!storDevice) | |
708 | { | |
709 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
710 | DPRINT_EXIT(STORVSC); | |
711 | return -2; | |
712 | } | |
713 | ||
04f50c4d | 714 | /* print_hex_dump_bytes("", DUMP_PREFIX_NONE, Request->Cdb, Request->CdbLen); */ |
bef4a34a HJ |
715 | |
716 | requestExtension->Request = Request; | |
717 | requestExtension->Device = Device; | |
718 | ||
719 | memset(vstorPacket, 0 , sizeof(VSTOR_PACKET)); | |
720 | ||
721 | vstorPacket->Flags |= REQUEST_COMPLETION_FLAG; | |
722 | ||
723 | vstorPacket->VmSrb.Length = sizeof(VMSCSI_REQUEST); | |
724 | ||
725 | vstorPacket->VmSrb.PortNumber = Request->Host; | |
726 | vstorPacket->VmSrb.PathId = Request->Bus; | |
727 | vstorPacket->VmSrb.TargetId = Request->TargetId; | |
728 | vstorPacket->VmSrb.Lun = Request->LunId; | |
729 | ||
730 | vstorPacket->VmSrb.SenseInfoLength = SENSE_BUFFER_SIZE; | |
731 | ||
732 | // Copy over the scsi command descriptor block | |
733 | vstorPacket->VmSrb.CdbLength = Request->CdbLen; | |
734 | memcpy(&vstorPacket->VmSrb.Cdb, Request->Cdb, Request->CdbLen); | |
735 | ||
736 | vstorPacket->VmSrb.DataIn = Request->Type; | |
737 | vstorPacket->VmSrb.DataTransferLength = Request->DataBuffer.Length; | |
738 | ||
739 | vstorPacket->Operation = VStorOperationExecuteSRB; | |
740 | ||
741 | DPRINT_DBG(STORVSC, "srb - len %d port %d, path %d, target %d, lun %d senselen %d cdblen %d", | |
742 | vstorPacket->VmSrb.Length, | |
743 | vstorPacket->VmSrb.PortNumber, | |
744 | vstorPacket->VmSrb.PathId, | |
745 | vstorPacket->VmSrb.TargetId, | |
746 | vstorPacket->VmSrb.Lun, | |
747 | vstorPacket->VmSrb.SenseInfoLength, | |
748 | vstorPacket->VmSrb.CdbLength); | |
749 | ||
750 | if (requestExtension->Request->DataBuffer.Length) | |
751 | { | |
752 | ret = Device->Driver->VmbusChannelInterface.SendPacketMultiPageBuffer(Device, | |
753 | &requestExtension->Request->DataBuffer, | |
754 | vstorPacket, | |
755 | sizeof(VSTOR_PACKET), | |
c4b0bc94 | 756 | (unsigned long)requestExtension); |
bef4a34a HJ |
757 | } |
758 | else | |
759 | { | |
760 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
761 | vstorPacket, | |
762 | sizeof(VSTOR_PACKET), | |
c4b0bc94 | 763 | (unsigned long)requestExtension, |
bef4a34a HJ |
764 | VmbusPacketTypeDataInBand, |
765 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
766 | } | |
767 | ||
768 | if (ret != 0) | |
769 | { | |
770 | DPRINT_DBG(STORVSC, "Unable to send packet %p ret %d", vstorPacket, ret); | |
771 | } | |
772 | ||
773 | InterlockedIncrement(&storDevice->NumOutstandingRequests); | |
774 | ||
775 | PutStorDevice(Device); | |
776 | ||
777 | DPRINT_EXIT(STORVSC); | |
778 | return ret; | |
779 | } | |
780 | ||
781 | /*++ | |
782 | ||
783 | Name: | |
784 | StorVscOnCleanup() | |
785 | ||
786 | Description: | |
787 | Perform any cleanup when the driver is removed | |
788 | ||
789 | --*/ | |
790 | void | |
791 | StorVscOnCleanup( | |
792 | DRIVER_OBJECT *Driver | |
793 | ) | |
794 | { | |
795 | DPRINT_ENTER(STORVSC); | |
796 | DPRINT_EXIT(STORVSC); | |
797 | } | |
798 | ||
799 | ||
800 | static void | |
801 | StorVscOnIOCompletion( | |
802 | DEVICE_OBJECT *Device, | |
803 | VSTOR_PACKET *VStorPacket, | |
804 | STORVSC_REQUEST_EXTENSION *RequestExt | |
805 | ) | |
806 | { | |
807 | STORVSC_REQUEST *request; | |
808 | STORVSC_DEVICE *storDevice; | |
809 | ||
810 | DPRINT_ENTER(STORVSC); | |
811 | ||
812 | storDevice = MustGetStorDevice(Device); | |
813 | if (!storDevice) | |
814 | { | |
815 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
816 | DPRINT_EXIT(STORVSC); | |
817 | return; | |
818 | } | |
819 | ||
2701f686 | 820 | DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION - request extension %p completed bytes xfer %lu", |
bef4a34a HJ |
821 | RequestExt, VStorPacket->VmSrb.DataTransferLength); |
822 | ||
823 | ASSERT(RequestExt != NULL); | |
824 | ASSERT(RequestExt->Request != NULL); | |
825 | ||
826 | request = RequestExt->Request; | |
827 | ||
828 | ASSERT(request->OnIOCompletion != NULL); | |
829 | ||
830 | // Copy over the status...etc | |
831 | request->Status = VStorPacket->VmSrb.ScsiStatus; | |
832 | ||
833 | if (request->Status != 0 || VStorPacket->VmSrb.SrbStatus != 1) | |
834 | { | |
835 | DPRINT_WARN(STORVSC, "cmd 0x%x scsi status 0x%x srb status 0x%x\n", | |
836 | request->Cdb[0], | |
837 | VStorPacket->VmSrb.ScsiStatus, | |
838 | VStorPacket->VmSrb.SrbStatus); | |
839 | } | |
840 | ||
841 | if ((request->Status & 0xFF) == 0x02) // CHECK_CONDITION | |
842 | { | |
843 | if (VStorPacket->VmSrb.SrbStatus & 0x80) // autosense data available | |
844 | { | |
845 | DPRINT_WARN(STORVSC, "storvsc pkt %p autosense data valid - len %d\n", | |
846 | RequestExt, VStorPacket->VmSrb.SenseInfoLength); | |
847 | ||
848 | ASSERT(VStorPacket->VmSrb.SenseInfoLength <= request->SenseBufferSize); | |
849 | memcpy(request->SenseBuffer, | |
850 | VStorPacket->VmSrb.SenseData, | |
851 | VStorPacket->VmSrb.SenseInfoLength); | |
852 | ||
853 | request->SenseBufferSize = VStorPacket->VmSrb.SenseInfoLength; | |
854 | } | |
855 | } | |
856 | ||
857 | // TODO: | |
858 | request->BytesXfer = VStorPacket->VmSrb.DataTransferLength; | |
859 | ||
860 | request->OnIOCompletion(request); | |
861 | ||
862 | InterlockedDecrement(&storDevice->NumOutstandingRequests); | |
863 | ||
864 | PutStorDevice(Device); | |
865 | ||
866 | DPRINT_EXIT(STORVSC); | |
867 | } | |
868 | ||
869 | ||
870 | static void | |
871 | StorVscOnReceive( | |
872 | DEVICE_OBJECT *Device, | |
873 | VSTOR_PACKET *VStorPacket, | |
874 | STORVSC_REQUEST_EXTENSION *RequestExt | |
875 | ) | |
876 | { | |
877 | switch(VStorPacket->Operation) | |
878 | { | |
879 | case VStorOperationCompleteIo: | |
880 | ||
881 | DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION"); | |
882 | StorVscOnIOCompletion(Device, VStorPacket, RequestExt); | |
883 | break; | |
884 | ||
885 | //case ENUMERATE_DEVICE_OPERATION: | |
886 | ||
887 | // DPRINT_INFO(STORVSC, "ENUMERATE_DEVICE_OPERATION"); | |
888 | ||
889 | // StorVscOnTargetRescan(Device); | |
890 | // break; | |
891 | ||
892 | case VStorOperationRemoveDevice: | |
893 | ||
894 | DPRINT_INFO(STORVSC, "REMOVE_DEVICE_OPERATION"); | |
895 | // TODO: | |
896 | break; | |
897 | ||
898 | default: | |
899 | DPRINT_INFO(STORVSC, "Unknown operation received - %d", VStorPacket->Operation); | |
900 | break; | |
901 | } | |
902 | } | |
903 | ||
904 | void | |
905 | StorVscOnChannelCallback( | |
8282c400 | 906 | void * Context |
bef4a34a HJ |
907 | ) |
908 | { | |
909 | int ret=0; | |
910 | DEVICE_OBJECT *device = (DEVICE_OBJECT*)Context; | |
911 | STORVSC_DEVICE *storDevice; | |
4d643114 | 912 | u32 bytesRecvd; |
59471438 GKH |
913 | u64 requestId; |
914 | unsigned char packet[ALIGN_UP(sizeof(VSTOR_PACKET),8)]; | |
bef4a34a HJ |
915 | STORVSC_REQUEST_EXTENSION *request; |
916 | ||
917 | DPRINT_ENTER(STORVSC); | |
918 | ||
919 | ASSERT(device); | |
920 | ||
921 | storDevice = MustGetStorDevice(device); | |
922 | if (!storDevice) | |
923 | { | |
924 | DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?"); | |
925 | DPRINT_EXIT(STORVSC); | |
926 | return; | |
927 | } | |
928 | ||
929 | do | |
930 | { | |
931 | ret = device->Driver->VmbusChannelInterface.RecvPacket(device, | |
932 | packet, | |
933 | ALIGN_UP(sizeof(VSTOR_PACKET),8), | |
934 | &bytesRecvd, | |
935 | &requestId); | |
936 | if (ret == 0 && bytesRecvd > 0) | |
937 | { | |
938 | DPRINT_DBG(STORVSC, "receive %d bytes - tid %llx", bytesRecvd, requestId); | |
939 | ||
940 | //ASSERT(bytesRecvd == sizeof(VSTOR_PACKET)); | |
941 | ||
c4b0bc94 | 942 | request = (STORVSC_REQUEST_EXTENSION*)(unsigned long)requestId; |
bef4a34a HJ |
943 | ASSERT(request); |
944 | ||
945 | //if (vstorPacket.Flags & SYNTHETIC_FLAG) | |
946 | if ((request == &storDevice->InitRequest) || (request == &storDevice->ResetRequest)) | |
947 | { | |
948 | //DPRINT_INFO(STORVSC, "reset completion - operation %u status %u", vstorPacket.Operation, vstorPacket.Status); | |
949 | ||
950 | memcpy(&request->VStorPacket, packet, sizeof(VSTOR_PACKET)); | |
951 | ||
952 | WaitEventSet(request->WaitEvent); | |
953 | } | |
954 | else | |
955 | { | |
956 | StorVscOnReceive(device, (VSTOR_PACKET*)packet, request); | |
957 | } | |
958 | } | |
959 | else | |
960 | { | |
961 | //DPRINT_DBG(STORVSC, "nothing else to read..."); | |
962 | break; | |
963 | } | |
964 | } while (1); | |
965 | ||
966 | PutStorDevice(device); | |
967 | ||
968 | DPRINT_EXIT(STORVSC); | |
969 | return; | |
970 | } |