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Commit | Line | Data |
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bef4a34a | 1 | /* |
bef4a34a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
bef4a34a | 20 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
0ffa63b0 | 22 | #include <linux/string.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
0ffa63b0 | 24 | #include <linux/mm.h> |
b4362c9c | 25 | #include <linux/delay.h> |
4983b39a | 26 | #include "osd.h" |
645954c5 | 27 | #include "logging.h" |
731a7884 | 28 | #include "StorVscApi.h" |
216260d8 | 29 | #include "VmbusPacketFormat.h" |
2dd88b51 | 30 | #include "vstorage.h" |
bef4a34a HJ |
31 | |
32 | ||
7dd03fc4 | 33 | struct storvsc_request_extension { |
068c5df2 | 34 | /* LIST_ENTRY ListEntry; */ |
bef4a34a | 35 | |
0b3f6834 | 36 | struct hv_storvsc_request *Request; |
3d3b5518 | 37 | struct hv_device *Device; |
bef4a34a | 38 | |
454f18a9 | 39 | /* Synchronize the request/response if needed */ |
aedb444a | 40 | struct osd_waitevent *WaitEvent; |
bef4a34a | 41 | |
b3715ee4 | 42 | struct vstor_packet VStorPacket; |
7dd03fc4 | 43 | }; |
bef4a34a | 44 | |
454f18a9 | 45 | /* A storvsc device is a device object that contains a vmbus channel */ |
7dd03fc4 | 46 | struct storvsc_device { |
3d3b5518 | 47 | struct hv_device *Device; |
bef4a34a | 48 | |
068c5df2 GKH |
49 | /* 0 indicates the device is being destroyed */ |
50 | atomic_t RefCount; | |
bef4a34a | 51 | |
f4888417 | 52 | atomic_t NumOutstandingRequests; |
bef4a34a | 53 | |
454f18a9 BP |
54 | /* |
55 | * Each unique Port/Path/Target represents 1 channel ie scsi | |
56 | * controller. In reality, the pathid, targetid is always 0 | |
57 | * and the port is set by us | |
58 | */ | |
068c5df2 GKH |
59 | unsigned int PortNumber; |
60 | unsigned char PathId; | |
61 | unsigned char TargetId; | |
bef4a34a | 62 | |
068c5df2 GKH |
63 | /* LIST_ENTRY OutstandingRequestList; */ |
64 | /* HANDLE OutstandingRequestLock; */ | |
bef4a34a | 65 | |
454f18a9 | 66 | /* Used for vsc/vsp channel reset process */ |
7dd03fc4 GKH |
67 | struct storvsc_request_extension InitRequest; |
68 | struct storvsc_request_extension ResetRequest; | |
7dd03fc4 | 69 | }; |
bef4a34a HJ |
70 | |
71 | ||
068c5df2 | 72 | static const char *gDriverName = "storvsc"; |
bef4a34a | 73 | |
454f18a9 | 74 | /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ |
caf26a31 GKH |
75 | static const struct hv_guid gStorVscDeviceType = { |
76 | .data = { | |
77 | 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
78 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f | |
79 | } | |
bef4a34a HJ |
80 | }; |
81 | ||
454f18a9 | 82 | |
7dd03fc4 | 83 | static inline struct storvsc_device *AllocStorDevice(struct hv_device *Device) |
bef4a34a | 84 | { |
7dd03fc4 | 85 | struct storvsc_device *storDevice; |
bef4a34a | 86 | |
7dd03fc4 | 87 | storDevice = kzalloc(sizeof(struct storvsc_device), GFP_KERNEL); |
bef4a34a HJ |
88 | if (!storDevice) |
89 | return NULL; | |
90 | ||
454f18a9 BP |
91 | /* Set to 2 to allow both inbound and outbound traffics */ |
92 | /* (ie GetStorDevice() and MustGetStorDevice()) to proceed. */ | |
f4888417 | 93 | atomic_cmpxchg(&storDevice->RefCount, 0, 2); |
bef4a34a HJ |
94 | |
95 | storDevice->Device = Device; | |
96 | Device->Extension = storDevice; | |
97 | ||
98 | return storDevice; | |
99 | } | |
100 | ||
7dd03fc4 | 101 | static inline void FreeStorDevice(struct storvsc_device *Device) |
bef4a34a | 102 | { |
068c5df2 | 103 | ASSERT(atomic_read(&Device->RefCount) == 0); |
8c69f52a | 104 | kfree(Device); |
bef4a34a HJ |
105 | } |
106 | ||
454f18a9 | 107 | /* Get the stordevice object iff exists and its refcount > 1 */ |
068c5df2 | 108 | static inline struct storvsc_device *GetStorDevice(struct hv_device *Device) |
bef4a34a | 109 | { |
7dd03fc4 | 110 | struct storvsc_device *storDevice; |
bef4a34a | 111 | |
7dd03fc4 | 112 | storDevice = (struct storvsc_device *)Device->Extension; |
f4888417 BP |
113 | if (storDevice && atomic_read(&storDevice->RefCount) > 1) |
114 | atomic_inc(&storDevice->RefCount); | |
bef4a34a | 115 | else |
bef4a34a | 116 | storDevice = NULL; |
bef4a34a HJ |
117 | |
118 | return storDevice; | |
119 | } | |
120 | ||
454f18a9 | 121 | /* Get the stordevice object iff exists and its refcount > 0 */ |
7dd03fc4 | 122 | static inline struct storvsc_device *MustGetStorDevice(struct hv_device *Device) |
bef4a34a | 123 | { |
7dd03fc4 | 124 | struct storvsc_device *storDevice; |
bef4a34a | 125 | |
7dd03fc4 | 126 | storDevice = (struct storvsc_device *)Device->Extension; |
f4888417 BP |
127 | if (storDevice && atomic_read(&storDevice->RefCount)) |
128 | atomic_inc(&storDevice->RefCount); | |
bef4a34a | 129 | else |
bef4a34a | 130 | storDevice = NULL; |
bef4a34a HJ |
131 | |
132 | return storDevice; | |
133 | } | |
134 | ||
3d3b5518 | 135 | static inline void PutStorDevice(struct hv_device *Device) |
bef4a34a | 136 | { |
7dd03fc4 | 137 | struct storvsc_device *storDevice; |
bef4a34a | 138 | |
7dd03fc4 | 139 | storDevice = (struct storvsc_device *)Device->Extension; |
bef4a34a HJ |
140 | ASSERT(storDevice); |
141 | ||
f4888417 BP |
142 | atomic_dec(&storDevice->RefCount); |
143 | ASSERT(atomic_read(&storDevice->RefCount)); | |
bef4a34a HJ |
144 | } |
145 | ||
454f18a9 | 146 | /* Drop ref count to 1 to effectively disable GetStorDevice() */ |
7dd03fc4 | 147 | static inline struct storvsc_device *ReleaseStorDevice(struct hv_device *Device) |
bef4a34a | 148 | { |
7dd03fc4 | 149 | struct storvsc_device *storDevice; |
bef4a34a | 150 | |
7dd03fc4 | 151 | storDevice = (struct storvsc_device *)Device->Extension; |
bef4a34a HJ |
152 | ASSERT(storDevice); |
153 | ||
454f18a9 | 154 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
f4888417 | 155 | while (atomic_cmpxchg(&storDevice->RefCount, 2, 1) != 2) |
b4362c9c | 156 | udelay(100); |
bef4a34a HJ |
157 | |
158 | return storDevice; | |
159 | } | |
160 | ||
454f18a9 | 161 | /* Drop ref count to 0. No one can use StorDevice object. */ |
068c5df2 GKH |
162 | static inline struct storvsc_device *FinalReleaseStorDevice( |
163 | struct hv_device *Device) | |
bef4a34a | 164 | { |
7dd03fc4 | 165 | struct storvsc_device *storDevice; |
bef4a34a | 166 | |
7dd03fc4 | 167 | storDevice = (struct storvsc_device *)Device->Extension; |
bef4a34a HJ |
168 | ASSERT(storDevice); |
169 | ||
454f18a9 | 170 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
f4888417 | 171 | while (atomic_cmpxchg(&storDevice->RefCount, 1, 0) != 1) |
b4362c9c | 172 | udelay(100); |
bef4a34a HJ |
173 | |
174 | Device->Extension = NULL; | |
175 | return storDevice; | |
176 | } | |
177 | ||
3d3b5518 | 178 | static int StorVscChannelInit(struct hv_device *Device) |
bef4a34a | 179 | { |
7dd03fc4 GKH |
180 | struct storvsc_device *storDevice; |
181 | struct storvsc_request_extension *request; | |
b3715ee4 | 182 | struct vstor_packet *vstorPacket; |
068c5df2 | 183 | int ret; |
bef4a34a HJ |
184 | |
185 | storDevice = GetStorDevice(Device); | |
068c5df2 GKH |
186 | if (!storDevice) { |
187 | DPRINT_ERR(STORVSC, "unable to get stor device..." | |
188 | "device being destroyed?"); | |
bef4a34a HJ |
189 | DPRINT_EXIT(STORVSC); |
190 | return -1; | |
191 | } | |
192 | ||
193 | request = &storDevice->InitRequest; | |
194 | vstorPacket = &request->VStorPacket; | |
195 | ||
068c5df2 GKH |
196 | /* |
197 | * Now, initiate the vsc/vsp initialization protocol on the open | |
198 | * channel | |
199 | */ | |
8c960e49 | 200 | memset(request, 0, sizeof(struct storvsc_request_extension)); |
bfc30aae | 201 | request->WaitEvent = osd_WaitEventCreate(); |
bef4a34a HJ |
202 | |
203 | vstorPacket->Operation = VStorOperationBeginInitialization; | |
204 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
205 | ||
206 | /*SpinlockAcquire(gDriverExt.packetListLock); | |
207 | INSERT_TAIL_LIST(&gDriverExt.packetList, &packet->listEntry.entry); | |
208 | SpinlockRelease(gDriverExt.packetListLock);*/ | |
209 | ||
210 | DPRINT_INFO(STORVSC, "BEGIN_INITIALIZATION_OPERATION..."); | |
211 | ||
212 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
068c5df2 GKH |
213 | vstorPacket, |
214 | sizeof(struct vstor_packet), | |
215 | (unsigned long)request, | |
216 | VmbusPacketTypeDataInBand, | |
217 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
218 | if (ret != 0) { | |
219 | DPRINT_ERR(STORVSC, | |
220 | "unable to send BEGIN_INITIALIZATION_OPERATION"); | |
bef4a34a HJ |
221 | goto Cleanup; |
222 | } | |
223 | ||
bfc30aae | 224 | osd_WaitEventWait(request->WaitEvent); |
bef4a34a | 225 | |
068c5df2 GKH |
226 | if (vstorPacket->Operation != VStorOperationCompleteIo || |
227 | vstorPacket->Status != 0) { | |
228 | DPRINT_ERR(STORVSC, "BEGIN_INITIALIZATION_OPERATION failed " | |
229 | "(op %d status 0x%x)", | |
230 | vstorPacket->Operation, vstorPacket->Status); | |
bef4a34a HJ |
231 | goto Cleanup; |
232 | } | |
233 | ||
234 | DPRINT_INFO(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION..."); | |
235 | ||
454f18a9 | 236 | /* reuse the packet for version range supported */ |
8c960e49 | 237 | memset(vstorPacket, 0, sizeof(struct vstor_packet)); |
bef4a34a HJ |
238 | vstorPacket->Operation = VStorOperationQueryProtocolVersion; |
239 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
240 | ||
068c5df2 GKH |
241 | vstorPacket->Version.MajorMinor = VMSTOR_PROTOCOL_VERSION_CURRENT; |
242 | FILL_VMSTOR_REVISION(vstorPacket->Version.Revision); | |
bef4a34a HJ |
243 | |
244 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
068c5df2 GKH |
245 | vstorPacket, |
246 | sizeof(struct vstor_packet), | |
247 | (unsigned long)request, | |
248 | VmbusPacketTypeDataInBand, | |
249 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
250 | if (ret != 0) { | |
251 | DPRINT_ERR(STORVSC, | |
252 | "unable to send BEGIN_INITIALIZATION_OPERATION"); | |
bef4a34a HJ |
253 | goto Cleanup; |
254 | } | |
255 | ||
bfc30aae | 256 | osd_WaitEventWait(request->WaitEvent); |
bef4a34a | 257 | |
454f18a9 | 258 | /* TODO: Check returned version */ |
068c5df2 GKH |
259 | if (vstorPacket->Operation != VStorOperationCompleteIo || |
260 | vstorPacket->Status != 0) { | |
261 | DPRINT_ERR(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION failed " | |
262 | "(op %d status 0x%x)", | |
263 | vstorPacket->Operation, vstorPacket->Status); | |
bef4a34a HJ |
264 | goto Cleanup; |
265 | } | |
266 | ||
454f18a9 | 267 | /* Query channel properties */ |
bef4a34a HJ |
268 | DPRINT_INFO(STORVSC, "QUERY_PROPERTIES_OPERATION..."); |
269 | ||
8c960e49 | 270 | memset(vstorPacket, 0, sizeof(struct vstor_packet)); |
068c5df2 | 271 | vstorPacket->Operation = VStorOperationQueryProperties; |
bef4a34a | 272 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; |
068c5df2 GKH |
273 | vstorPacket->StorageChannelProperties.PortNumber = |
274 | storDevice->PortNumber; | |
bef4a34a HJ |
275 | |
276 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
068c5df2 GKH |
277 | vstorPacket, |
278 | sizeof(struct vstor_packet), | |
279 | (unsigned long)request, | |
280 | VmbusPacketTypeDataInBand, | |
281 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
282 | ||
283 | if (ret != 0) { | |
284 | DPRINT_ERR(STORVSC, | |
285 | "unable to send QUERY_PROPERTIES_OPERATION"); | |
bef4a34a HJ |
286 | goto Cleanup; |
287 | } | |
288 | ||
bfc30aae | 289 | osd_WaitEventWait(request->WaitEvent); |
bef4a34a | 290 | |
454f18a9 | 291 | /* TODO: Check returned version */ |
068c5df2 GKH |
292 | if (vstorPacket->Operation != VStorOperationCompleteIo || |
293 | vstorPacket->Status != 0) { | |
294 | DPRINT_ERR(STORVSC, "QUERY_PROPERTIES_OPERATION failed " | |
295 | "(op %d status 0x%x)", | |
296 | vstorPacket->Operation, vstorPacket->Status); | |
bef4a34a HJ |
297 | goto Cleanup; |
298 | } | |
299 | ||
bef4a34a HJ |
300 | storDevice->PathId = vstorPacket->StorageChannelProperties.PathId; |
301 | storDevice->TargetId = vstorPacket->StorageChannelProperties.TargetId; | |
302 | ||
068c5df2 GKH |
303 | DPRINT_DBG(STORVSC, "channel flag 0x%x, max xfer len 0x%x", |
304 | vstorPacket->StorageChannelProperties.Flags, | |
305 | vstorPacket->StorageChannelProperties.MaxTransferBytes); | |
bef4a34a HJ |
306 | |
307 | DPRINT_INFO(STORVSC, "END_INITIALIZATION_OPERATION..."); | |
308 | ||
8c960e49 | 309 | memset(vstorPacket, 0, sizeof(struct vstor_packet)); |
068c5df2 | 310 | vstorPacket->Operation = VStorOperationEndInitialization; |
bef4a34a HJ |
311 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; |
312 | ||
313 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
068c5df2 GKH |
314 | vstorPacket, |
315 | sizeof(struct vstor_packet), | |
316 | (unsigned long)request, | |
317 | VmbusPacketTypeDataInBand, | |
318 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
319 | ||
320 | if (ret != 0) { | |
321 | DPRINT_ERR(STORVSC, | |
322 | "unable to send END_INITIALIZATION_OPERATION"); | |
bef4a34a HJ |
323 | goto Cleanup; |
324 | } | |
325 | ||
bfc30aae | 326 | osd_WaitEventWait(request->WaitEvent); |
bef4a34a | 327 | |
068c5df2 GKH |
328 | if (vstorPacket->Operation != VStorOperationCompleteIo || |
329 | vstorPacket->Status != 0) { | |
330 | DPRINT_ERR(STORVSC, "END_INITIALIZATION_OPERATION failed " | |
331 | "(op %d status 0x%x)", | |
332 | vstorPacket->Operation, vstorPacket->Status); | |
bef4a34a HJ |
333 | goto Cleanup; |
334 | } | |
335 | ||
336 | DPRINT_INFO(STORVSC, "**** storage channel up and running!! ****"); | |
337 | ||
338 | Cleanup: | |
068c5df2 GKH |
339 | kfree(request->WaitEvent); |
340 | request->WaitEvent = NULL; | |
bef4a34a HJ |
341 | |
342 | PutStorDevice(Device); | |
343 | ||
344 | DPRINT_EXIT(STORVSC); | |
345 | return ret; | |
346 | } | |
347 | ||
163680b4 GKH |
348 | static void StorVscOnIOCompletion(struct hv_device *Device, |
349 | struct vstor_packet *VStorPacket, | |
350 | struct storvsc_request_extension *RequestExt) | |
351 | { | |
352 | struct hv_storvsc_request *request; | |
353 | struct storvsc_device *storDevice; | |
354 | ||
355 | DPRINT_ENTER(STORVSC); | |
356 | ||
357 | storDevice = MustGetStorDevice(Device); | |
358 | if (!storDevice) { | |
359 | DPRINT_ERR(STORVSC, "unable to get stor device..." | |
360 | "device being destroyed?"); | |
361 | DPRINT_EXIT(STORVSC); | |
362 | return; | |
363 | } | |
364 | ||
365 | DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION - request extension %p " | |
366 | "completed bytes xfer %u", RequestExt, | |
367 | VStorPacket->VmSrb.DataTransferLength); | |
368 | ||
369 | ASSERT(RequestExt != NULL); | |
370 | ASSERT(RequestExt->Request != NULL); | |
371 | ||
372 | request = RequestExt->Request; | |
373 | ||
374 | ASSERT(request->OnIOCompletion != NULL); | |
375 | ||
376 | /* Copy over the status...etc */ | |
377 | request->Status = VStorPacket->VmSrb.ScsiStatus; | |
378 | ||
379 | if (request->Status != 0 || VStorPacket->VmSrb.SrbStatus != 1) { | |
380 | DPRINT_WARN(STORVSC, | |
381 | "cmd 0x%x scsi status 0x%x srb status 0x%x\n", | |
382 | request->Cdb[0], VStorPacket->VmSrb.ScsiStatus, | |
383 | VStorPacket->VmSrb.SrbStatus); | |
384 | } | |
385 | ||
386 | if ((request->Status & 0xFF) == 0x02) { | |
387 | /* CHECK_CONDITION */ | |
388 | if (VStorPacket->VmSrb.SrbStatus & 0x80) { | |
389 | /* autosense data available */ | |
390 | DPRINT_WARN(STORVSC, "storvsc pkt %p autosense data " | |
391 | "valid - len %d\n", RequestExt, | |
392 | VStorPacket->VmSrb.SenseInfoLength); | |
393 | ||
394 | ASSERT(VStorPacket->VmSrb.SenseInfoLength <= | |
395 | request->SenseBufferSize); | |
396 | memcpy(request->SenseBuffer, | |
397 | VStorPacket->VmSrb.SenseData, | |
398 | VStorPacket->VmSrb.SenseInfoLength); | |
399 | ||
400 | request->SenseBufferSize = | |
401 | VStorPacket->VmSrb.SenseInfoLength; | |
402 | } | |
403 | } | |
404 | ||
405 | /* TODO: */ | |
406 | request->BytesXfer = VStorPacket->VmSrb.DataTransferLength; | |
407 | ||
408 | request->OnIOCompletion(request); | |
409 | ||
410 | atomic_dec(&storDevice->NumOutstandingRequests); | |
411 | ||
412 | PutStorDevice(Device); | |
413 | ||
414 | DPRINT_EXIT(STORVSC); | |
415 | } | |
416 | ||
417 | static void StorVscOnReceive(struct hv_device *Device, | |
418 | struct vstor_packet *VStorPacket, | |
419 | struct storvsc_request_extension *RequestExt) | |
420 | { | |
421 | switch (VStorPacket->Operation) { | |
422 | case VStorOperationCompleteIo: | |
423 | DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION"); | |
424 | StorVscOnIOCompletion(Device, VStorPacket, RequestExt); | |
425 | break; | |
426 | case VStorOperationRemoveDevice: | |
427 | DPRINT_INFO(STORVSC, "REMOVE_DEVICE_OPERATION"); | |
428 | /* TODO: */ | |
429 | break; | |
430 | ||
431 | default: | |
432 | DPRINT_INFO(STORVSC, "Unknown operation received - %d", | |
433 | VStorPacket->Operation); | |
434 | break; | |
435 | } | |
436 | } | |
437 | ||
438 | static void StorVscOnChannelCallback(void *context) | |
439 | { | |
440 | struct hv_device *device = (struct hv_device *)context; | |
441 | struct storvsc_device *storDevice; | |
442 | u32 bytesRecvd; | |
443 | u64 requestId; | |
444 | unsigned char packet[ALIGN_UP(sizeof(struct vstor_packet), 8)]; | |
445 | struct storvsc_request_extension *request; | |
446 | int ret; | |
447 | ||
448 | DPRINT_ENTER(STORVSC); | |
449 | ||
450 | ASSERT(device); | |
451 | ||
452 | storDevice = MustGetStorDevice(device); | |
453 | if (!storDevice) { | |
454 | DPRINT_ERR(STORVSC, "unable to get stor device..." | |
455 | "device being destroyed?"); | |
456 | DPRINT_EXIT(STORVSC); | |
457 | return; | |
458 | } | |
459 | ||
460 | do { | |
461 | ret = device->Driver->VmbusChannelInterface.RecvPacket(device, | |
462 | packet, | |
463 | ALIGN_UP(sizeof(struct vstor_packet), 8), | |
464 | &bytesRecvd, &requestId); | |
465 | if (ret == 0 && bytesRecvd > 0) { | |
466 | DPRINT_DBG(STORVSC, "receive %d bytes - tid %llx", | |
467 | bytesRecvd, requestId); | |
468 | ||
469 | /* ASSERT(bytesRecvd == sizeof(struct vstor_packet)); */ | |
470 | ||
471 | request = (struct storvsc_request_extension *) | |
472 | (unsigned long)requestId; | |
473 | ASSERT(request); | |
474 | ||
475 | /* if (vstorPacket.Flags & SYNTHETIC_FLAG) */ | |
476 | if ((request == &storDevice->InitRequest) || | |
477 | (request == &storDevice->ResetRequest)) { | |
478 | /* DPRINT_INFO(STORVSC, | |
479 | * "reset completion - operation " | |
480 | * "%u status %u", | |
481 | * vstorPacket.Operation, | |
482 | * vstorPacket.Status); */ | |
483 | ||
484 | memcpy(&request->VStorPacket, packet, | |
485 | sizeof(struct vstor_packet)); | |
486 | ||
487 | osd_WaitEventSet(request->WaitEvent); | |
488 | } else { | |
489 | StorVscOnReceive(device, | |
490 | (struct vstor_packet *)packet, | |
491 | request); | |
492 | } | |
493 | } else { | |
494 | /* DPRINT_DBG(STORVSC, "nothing else to read..."); */ | |
495 | break; | |
496 | } | |
497 | } while (1); | |
498 | ||
499 | PutStorDevice(device); | |
500 | ||
501 | DPRINT_EXIT(STORVSC); | |
502 | return; | |
503 | } | |
504 | ||
068c5df2 | 505 | static int StorVscConnectToVsp(struct hv_device *Device) |
bef4a34a | 506 | { |
b3715ee4 | 507 | struct vmstorage_channel_properties props; |
068c5df2 GKH |
508 | struct storvsc_driver_object *storDriver; |
509 | int ret; | |
bef4a34a | 510 | |
068c5df2 | 511 | storDriver = (struct storvsc_driver_object *)Device->Driver; |
8c960e49 | 512 | memset(&props, 0, sizeof(struct vmstorage_channel_properties)); |
bef4a34a | 513 | |
454f18a9 | 514 | /* Open the channel */ |
bef4a34a | 515 | ret = Device->Driver->VmbusChannelInterface.Open(Device, |
068c5df2 GKH |
516 | storDriver->RingBufferSize, |
517 | storDriver->RingBufferSize, | |
518 | (void *)&props, | |
519 | sizeof(struct vmstorage_channel_properties), | |
520 | StorVscOnChannelCallback, | |
521 | Device); | |
522 | ||
523 | DPRINT_DBG(STORVSC, "storage props: path id %d, tgt id %d, max xfer %d", | |
524 | props.PathId, props.TargetId, props.MaxTransferBytes); | |
525 | ||
526 | if (ret != 0) { | |
bef4a34a HJ |
527 | DPRINT_ERR(STORVSC, "unable to open channel: %d", ret); |
528 | return -1; | |
529 | } | |
530 | ||
531 | ret = StorVscChannelInit(Device); | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
163680b4 GKH |
536 | /** |
537 | * StorVscOnDeviceAdd - Callback when the device belonging to this driver is added | |
538 | */ | |
539 | static int StorVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo) | |
540 | { | |
541 | struct storvsc_device *storDevice; | |
542 | /* struct vmstorage_channel_properties *props; */ | |
543 | struct storvsc_device_info *deviceInfo; | |
544 | int ret = 0; | |
545 | ||
546 | DPRINT_ENTER(STORVSC); | |
547 | ||
548 | deviceInfo = (struct storvsc_device_info *)AdditionalInfo; | |
549 | storDevice = AllocStorDevice(Device); | |
550 | if (!storDevice) { | |
551 | ret = -1; | |
552 | goto Cleanup; | |
553 | } | |
554 | ||
555 | /* Save the channel properties to our storvsc channel */ | |
556 | /* props = (struct vmstorage_channel_properties *) | |
557 | * channel->offerMsg.Offer.u.Standard.UserDefined; */ | |
558 | ||
559 | /* FIXME: */ | |
560 | /* | |
561 | * If we support more than 1 scsi channel, we need to set the | |
562 | * port number here to the scsi channel but how do we get the | |
563 | * scsi channel prior to the bus scan | |
564 | */ | |
565 | ||
566 | /* storChannel->PortNumber = 0; | |
567 | storChannel->PathId = props->PathId; | |
568 | storChannel->TargetId = props->TargetId; */ | |
569 | ||
570 | storDevice->PortNumber = deviceInfo->PortNumber; | |
571 | /* Send it back up */ | |
572 | ret = StorVscConnectToVsp(Device); | |
573 | ||
574 | /* deviceInfo->PortNumber = storDevice->PortNumber; */ | |
575 | deviceInfo->PathId = storDevice->PathId; | |
576 | deviceInfo->TargetId = storDevice->TargetId; | |
577 | ||
578 | DPRINT_DBG(STORVSC, "assigned port %u, path %u target %u\n", | |
579 | storDevice->PortNumber, storDevice->PathId, | |
580 | storDevice->TargetId); | |
581 | ||
582 | Cleanup: | |
583 | DPRINT_EXIT(STORVSC); | |
584 | ||
585 | return ret; | |
586 | } | |
bef4a34a | 587 | |
068c5df2 GKH |
588 | /** |
589 | * StorVscOnDeviceRemove - Callback when the our device is being removed | |
590 | */ | |
591 | static int StorVscOnDeviceRemove(struct hv_device *Device) | |
bef4a34a | 592 | { |
7dd03fc4 | 593 | struct storvsc_device *storDevice; |
bef4a34a HJ |
594 | |
595 | DPRINT_ENTER(STORVSC); | |
596 | ||
068c5df2 GKH |
597 | DPRINT_INFO(STORVSC, "disabling storage device (%p)...", |
598 | Device->Extension); | |
bef4a34a HJ |
599 | |
600 | storDevice = ReleaseStorDevice(Device); | |
601 | ||
454f18a9 BP |
602 | /* |
603 | * At this point, all outbound traffic should be disable. We | |
604 | * only allow inbound traffic (responses) to proceed so that | |
605 | * outstanding requests can be completed. | |
606 | */ | |
068c5df2 GKH |
607 | while (atomic_read(&storDevice->NumOutstandingRequests)) { |
608 | DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", | |
609 | atomic_read(&storDevice->NumOutstandingRequests)); | |
b4362c9c | 610 | udelay(100); |
bef4a34a HJ |
611 | } |
612 | ||
068c5df2 GKH |
613 | DPRINT_INFO(STORVSC, "removing storage device (%p)...", |
614 | Device->Extension); | |
bef4a34a HJ |
615 | |
616 | storDevice = FinalReleaseStorDevice(Device); | |
617 | ||
618 | DPRINT_INFO(STORVSC, "storage device (%p) safe to remove", storDevice); | |
619 | ||
454f18a9 | 620 | /* Close the channel */ |
bef4a34a HJ |
621 | Device->Driver->VmbusChannelInterface.Close(Device); |
622 | ||
623 | FreeStorDevice(storDevice); | |
624 | ||
625 | DPRINT_EXIT(STORVSC); | |
068c5df2 | 626 | return 0; |
454f18a9 | 627 | } |
bef4a34a | 628 | |
354b0a64 | 629 | int StorVscOnHostReset(struct hv_device *Device) |
bef4a34a | 630 | { |
7dd03fc4 GKH |
631 | struct storvsc_device *storDevice; |
632 | struct storvsc_request_extension *request; | |
b3715ee4 | 633 | struct vstor_packet *vstorPacket; |
068c5df2 | 634 | int ret; |
bef4a34a HJ |
635 | |
636 | DPRINT_ENTER(STORVSC); | |
637 | ||
638 | DPRINT_INFO(STORVSC, "resetting host adapter..."); | |
639 | ||
640 | storDevice = GetStorDevice(Device); | |
068c5df2 GKH |
641 | if (!storDevice) { |
642 | DPRINT_ERR(STORVSC, "unable to get stor device..." | |
643 | "device being destroyed?"); | |
bef4a34a HJ |
644 | DPRINT_EXIT(STORVSC); |
645 | return -1; | |
646 | } | |
647 | ||
648 | request = &storDevice->ResetRequest; | |
649 | vstorPacket = &request->VStorPacket; | |
650 | ||
bfc30aae | 651 | request->WaitEvent = osd_WaitEventCreate(); |
bef4a34a | 652 | |
068c5df2 GKH |
653 | vstorPacket->Operation = VStorOperationResetBus; |
654 | vstorPacket->Flags = REQUEST_COMPLETION_FLAG; | |
655 | vstorPacket->VmSrb.PathId = storDevice->PathId; | |
bef4a34a HJ |
656 | |
657 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
068c5df2 GKH |
658 | vstorPacket, |
659 | sizeof(struct vstor_packet), | |
660 | (unsigned long)&storDevice->ResetRequest, | |
661 | VmbusPacketTypeDataInBand, | |
662 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
663 | if (ret != 0) { | |
664 | DPRINT_ERR(STORVSC, "Unable to send reset packet %p ret %d", | |
665 | vstorPacket, ret); | |
bef4a34a HJ |
666 | goto Cleanup; |
667 | } | |
668 | ||
454f18a9 | 669 | /* FIXME: Add a timeout */ |
bfc30aae | 670 | osd_WaitEventWait(request->WaitEvent); |
bef4a34a | 671 | |
420beac4 | 672 | kfree(request->WaitEvent); |
bef4a34a HJ |
673 | DPRINT_INFO(STORVSC, "host adapter reset completed"); |
674 | ||
454f18a9 BP |
675 | /* |
676 | * At this point, all outstanding requests in the adapter | |
677 | * should have been flushed out and return to us | |
678 | */ | |
bef4a34a HJ |
679 | |
680 | Cleanup: | |
681 | PutStorDevice(Device); | |
682 | DPRINT_EXIT(STORVSC); | |
683 | return ret; | |
684 | } | |
685 | ||
068c5df2 GKH |
686 | /** |
687 | * StorVscOnIORequest - Callback to initiate an I/O request | |
688 | */ | |
689 | static int StorVscOnIORequest(struct hv_device *Device, | |
690 | struct hv_storvsc_request *Request) | |
bef4a34a | 691 | { |
7dd03fc4 | 692 | struct storvsc_device *storDevice; |
068c5df2 GKH |
693 | struct storvsc_request_extension *requestExtension; |
694 | struct vstor_packet *vstorPacket; | |
695 | int ret = 0; | |
bef4a34a HJ |
696 | |
697 | DPRINT_ENTER(STORVSC); | |
698 | ||
068c5df2 GKH |
699 | requestExtension = |
700 | (struct storvsc_request_extension *)Request->Extension; | |
701 | vstorPacket = &requestExtension->VStorPacket; | |
bef4a34a HJ |
702 | storDevice = GetStorDevice(Device); |
703 | ||
068c5df2 GKH |
704 | DPRINT_DBG(STORVSC, "enter - Device %p, DeviceExt %p, Request %p, " |
705 | "Extension %p", Device, storDevice, Request, | |
706 | requestExtension); | |
bef4a34a HJ |
707 | |
708 | DPRINT_DBG(STORVSC, "req %p len %d bus %d, target %d, lun %d cdblen %d", | |
068c5df2 GKH |
709 | Request, Request->DataBuffer.Length, Request->Bus, |
710 | Request->TargetId, Request->LunId, Request->CdbLen); | |
bef4a34a | 711 | |
068c5df2 GKH |
712 | if (!storDevice) { |
713 | DPRINT_ERR(STORVSC, "unable to get stor device..." | |
714 | "device being destroyed?"); | |
bef4a34a HJ |
715 | DPRINT_EXIT(STORVSC); |
716 | return -2; | |
717 | } | |
718 | ||
068c5df2 GKH |
719 | /* print_hex_dump_bytes("", DUMP_PREFIX_NONE, Request->Cdb, |
720 | * Request->CdbLen); */ | |
bef4a34a HJ |
721 | |
722 | requestExtension->Request = Request; | |
723 | requestExtension->Device = Device; | |
724 | ||
b3715ee4 | 725 | memset(vstorPacket, 0 , sizeof(struct vstor_packet)); |
bef4a34a HJ |
726 | |
727 | vstorPacket->Flags |= REQUEST_COMPLETION_FLAG; | |
728 | ||
068c5df2 | 729 | vstorPacket->VmSrb.Length = sizeof(struct vmscsi_request); |
bef4a34a HJ |
730 | |
731 | vstorPacket->VmSrb.PortNumber = Request->Host; | |
068c5df2 GKH |
732 | vstorPacket->VmSrb.PathId = Request->Bus; |
733 | vstorPacket->VmSrb.TargetId = Request->TargetId; | |
734 | vstorPacket->VmSrb.Lun = Request->LunId; | |
bef4a34a HJ |
735 | |
736 | vstorPacket->VmSrb.SenseInfoLength = SENSE_BUFFER_SIZE; | |
737 | ||
454f18a9 | 738 | /* Copy over the scsi command descriptor block */ |
068c5df2 | 739 | vstorPacket->VmSrb.CdbLength = Request->CdbLen; |
bef4a34a HJ |
740 | memcpy(&vstorPacket->VmSrb.Cdb, Request->Cdb, Request->CdbLen); |
741 | ||
742 | vstorPacket->VmSrb.DataIn = Request->Type; | |
743 | vstorPacket->VmSrb.DataTransferLength = Request->DataBuffer.Length; | |
744 | ||
745 | vstorPacket->Operation = VStorOperationExecuteSRB; | |
746 | ||
068c5df2 GKH |
747 | DPRINT_DBG(STORVSC, "srb - len %d port %d, path %d, target %d, " |
748 | "lun %d senselen %d cdblen %d", | |
749 | vstorPacket->VmSrb.Length, | |
750 | vstorPacket->VmSrb.PortNumber, | |
751 | vstorPacket->VmSrb.PathId, | |
752 | vstorPacket->VmSrb.TargetId, | |
753 | vstorPacket->VmSrb.Lun, | |
754 | vstorPacket->VmSrb.SenseInfoLength, | |
755 | vstorPacket->VmSrb.CdbLength); | |
756 | ||
757 | if (requestExtension->Request->DataBuffer.Length) { | |
758 | ret = Device->Driver->VmbusChannelInterface. | |
759 | SendPacketMultiPageBuffer(Device, | |
bef4a34a HJ |
760 | &requestExtension->Request->DataBuffer, |
761 | vstorPacket, | |
b3715ee4 | 762 | sizeof(struct vstor_packet), |
c4b0bc94 | 763 | (unsigned long)requestExtension); |
068c5df2 | 764 | } else { |
bef4a34a | 765 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
068c5df2 GKH |
766 | vstorPacket, |
767 | sizeof(struct vstor_packet), | |
768 | (unsigned long)requestExtension, | |
769 | VmbusPacketTypeDataInBand, | |
770 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
bef4a34a HJ |
771 | } |
772 | ||
068c5df2 GKH |
773 | if (ret != 0) { |
774 | DPRINT_DBG(STORVSC, "Unable to send packet %p ret %d", | |
775 | vstorPacket, ret); | |
bef4a34a HJ |
776 | } |
777 | ||
f4888417 | 778 | atomic_inc(&storDevice->NumOutstandingRequests); |
bef4a34a HJ |
779 | |
780 | PutStorDevice(Device); | |
781 | ||
782 | DPRINT_EXIT(STORVSC); | |
783 | return ret; | |
784 | } | |
785 | ||
068c5df2 GKH |
786 | /** |
787 | * StorVscOnCleanup - Perform any cleanup when the driver is removed | |
788 | */ | |
789 | static void StorVscOnCleanup(struct hv_driver *Driver) | |
bef4a34a HJ |
790 | { |
791 | DPRINT_ENTER(STORVSC); | |
792 | DPRINT_EXIT(STORVSC); | |
793 | } | |
794 | ||
163680b4 GKH |
795 | /** |
796 | * StorVscInitialize - Main entry point | |
797 | */ | |
798 | int StorVscInitialize(struct hv_driver *Driver) | |
bef4a34a | 799 | { |
163680b4 | 800 | struct storvsc_driver_object *storDriver; |
bef4a34a HJ |
801 | |
802 | DPRINT_ENTER(STORVSC); | |
803 | ||
163680b4 | 804 | storDriver = (struct storvsc_driver_object *)Driver; |
bef4a34a | 805 | |
163680b4 GKH |
806 | DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%zd " |
807 | "sizeof(struct storvsc_request_extension)=%zd " | |
808 | "sizeof(struct vstor_packet)=%zd, " | |
809 | "sizeof(struct vmscsi_request)=%zd", | |
810 | sizeof(struct hv_storvsc_request), | |
811 | sizeof(struct storvsc_request_extension), | |
812 | sizeof(struct vstor_packet), | |
813 | sizeof(struct vmscsi_request)); | |
bef4a34a | 814 | |
163680b4 GKH |
815 | /* Make sure we are at least 2 pages since 1 page is used for control */ |
816 | ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1)); | |
bef4a34a | 817 | |
163680b4 GKH |
818 | Driver->name = gDriverName; |
819 | memcpy(&Driver->deviceType, &gStorVscDeviceType, | |
820 | sizeof(struct hv_guid)); | |
bef4a34a | 821 | |
163680b4 | 822 | storDriver->RequestExtSize = sizeof(struct storvsc_request_extension); |
bef4a34a | 823 | |
163680b4 GKH |
824 | /* |
825 | * Divide the ring buffer data size (which is 1 page less | |
826 | * than the ring buffer size since that page is reserved for | |
827 | * the ring buffer indices) by the max request size (which is | |
828 | * VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER + struct vstor_packet + u64) | |
829 | */ | |
830 | storDriver->MaxOutstandingRequestsPerChannel = | |
831 | ((storDriver->RingBufferSize - PAGE_SIZE) / | |
832 | ALIGN_UP(MAX_MULTIPAGE_BUFFER_PACKET + | |
833 | sizeof(struct vstor_packet) + sizeof(u64), | |
834 | sizeof(u64))); | |
bef4a34a | 835 | |
163680b4 GKH |
836 | DPRINT_INFO(STORVSC, "max io %u, currently %u\n", |
837 | storDriver->MaxOutstandingRequestsPerChannel, | |
838 | STORVSC_MAX_IO_REQUESTS); | |
bef4a34a | 839 | |
163680b4 GKH |
840 | /* Setup the dispatch table */ |
841 | storDriver->Base.OnDeviceAdd = StorVscOnDeviceAdd; | |
842 | storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove; | |
843 | storDriver->Base.OnCleanup = StorVscOnCleanup; | |
bef4a34a | 844 | |
163680b4 | 845 | storDriver->OnIORequest = StorVscOnIORequest; |
bef4a34a HJ |
846 | |
847 | DPRINT_EXIT(STORVSC); | |
bef4a34a | 848 | |
163680b4 | 849 | return 0; |
bef4a34a | 850 | } |