Commit | Line | Data |
---|---|---|
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> | |
972621c9 | 20 | * K. Y. Srinivasan <kys@microsoft.com> |
bef4a34a | 21 | */ |
a1be1706 S |
22 | |
23 | #include <linux/kernel.h> | |
f0d79fe9 | 24 | #include <linux/wait.h> |
a1be1706 S |
25 | #include <linux/sched.h> |
26 | #include <linux/completion.h> | |
27 | #include <linux/string.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/delay.h> | |
bef4a34a | 30 | #include <linux/init.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
bef4a34a HJ |
32 | #include <linux/module.h> |
33 | #include <linux/device.h> | |
46a97191 | 34 | #include <linux/hyperv.h> |
4e03e697 | 35 | #include <linux/mempool.h> |
bef4a34a HJ |
36 | #include <scsi/scsi.h> |
37 | #include <scsi/scsi_cmnd.h> | |
38 | #include <scsi/scsi_host.h> | |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_tcq.h> | |
41 | #include <scsi/scsi_eh.h> | |
42 | #include <scsi/scsi_devinfo.h> | |
bef4a34a | 43 | #include <scsi/scsi_dbg.h> |
3f335ea2 | 44 | |
f0d79fe9 | 45 | |
4e03e697 | 46 | #define STORVSC_MIN_BUF_NR 64 |
c1b3d067 S |
47 | #define STORVSC_RING_BUFFER_SIZE (20*PAGE_SIZE) |
48 | static int storvsc_ringbuffer_size = STORVSC_RING_BUFFER_SIZE; | |
49 | ||
50 | module_param(storvsc_ringbuffer_size, int, S_IRUGO); | |
51 | MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)"); | |
52 | ||
f0d79fe9 S |
53 | /* to alert the user that structure sizes may be mismatched even though the */ |
54 | /* protocol versions match. */ | |
55 | ||
56 | ||
57 | #define REVISION_STRING(REVISION_) #REVISION_ | |
58 | #define FILL_VMSTOR_REVISION(RESULT_LVALUE_) \ | |
59 | do { \ | |
60 | char *revision_string \ | |
61 | = REVISION_STRING($Rev : 6 $) + 6; \ | |
62 | RESULT_LVALUE_ = 0; \ | |
63 | while (*revision_string >= '0' \ | |
64 | && *revision_string <= '9') { \ | |
65 | RESULT_LVALUE_ *= 10; \ | |
66 | RESULT_LVALUE_ += *revision_string - '0'; \ | |
67 | revision_string++; \ | |
68 | } \ | |
69 | } while (0) | |
70 | ||
71 | /* Major/minor macros. Minor version is in LSB, meaning that earlier flat */ | |
72 | /* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). */ | |
73 | #define VMSTOR_PROTOCOL_MAJOR(VERSION_) (((VERSION_) >> 8) & 0xff) | |
74 | #define VMSTOR_PROTOCOL_MINOR(VERSION_) (((VERSION_)) & 0xff) | |
75 | #define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \ | |
76 | (((MINOR_) & 0xff))) | |
77 | #define VMSTOR_INVALID_PROTOCOL_VERSION (-1) | |
78 | ||
79 | /* Version history: */ | |
80 | /* V1 Beta 0.1 */ | |
81 | /* V1 RC < 2008/1/31 1.0 */ | |
82 | /* V1 RC > 2008/1/31 2.0 */ | |
2b9525f5 | 83 | #define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(4, 2) |
f0d79fe9 S |
84 | |
85 | ||
86 | ||
87 | ||
88 | /* This will get replaced with the max transfer length that is possible on */ | |
89 | /* the host adapter. */ | |
90 | /* The max transfer length will be published when we offer a vmbus channel. */ | |
91 | #define MAX_TRANSFER_LENGTH 0x40000 | |
92 | #define DEFAULT_PACKET_SIZE (sizeof(struct vmdata_gpa_direct) + \ | |
93 | sizeof(struct vstor_packet) + \ | |
94 | sizesizeof(u64) * (MAX_TRANSFER_LENGTH / PAGE_SIZE))) | |
95 | ||
96 | ||
97 | /* Packet structure describing virtual storage requests. */ | |
98 | enum vstor_packet_operation { | |
99 | VSTOR_OPERATION_COMPLETE_IO = 1, | |
100 | VSTOR_OPERATION_REMOVE_DEVICE = 2, | |
101 | VSTOR_OPERATION_EXECUTE_SRB = 3, | |
102 | VSTOR_OPERATION_RESET_LUN = 4, | |
103 | VSTOR_OPERATION_RESET_ADAPTER = 5, | |
104 | VSTOR_OPERATION_RESET_BUS = 6, | |
105 | VSTOR_OPERATION_BEGIN_INITIALIZATION = 7, | |
106 | VSTOR_OPERATION_END_INITIALIZATION = 8, | |
107 | VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9, | |
108 | VSTOR_OPERATION_QUERY_PROPERTIES = 10, | |
2b9525f5 S |
109 | VSTOR_OPERATION_ENUMERATE_BUS = 11, |
110 | VSTOR_OPERATION_MAXIMUM = 11 | |
f0d79fe9 S |
111 | }; |
112 | ||
113 | /* | |
114 | * Platform neutral description of a scsi request - | |
115 | * this remains the same across the write regardless of 32/64 bit | |
116 | * note: it's patterned off the SCSI_PASS_THROUGH structure | |
117 | */ | |
118 | #define CDB16GENERIC_LENGTH 0x10 | |
119 | ||
120 | #ifndef SENSE_BUFFER_SIZE | |
121 | #define SENSE_BUFFER_SIZE 0x12 | |
122 | #endif | |
123 | ||
124 | #define MAX_DATA_BUF_LEN_WITH_PADDING 0x14 | |
125 | ||
126 | struct vmscsi_request { | |
127 | unsigned short length; | |
128 | unsigned char srb_status; | |
129 | unsigned char scsi_status; | |
130 | ||
131 | unsigned char port_number; | |
132 | unsigned char path_id; | |
133 | unsigned char target_id; | |
134 | unsigned char lun; | |
135 | ||
136 | unsigned char cdb_length; | |
137 | unsigned char sense_info_length; | |
138 | unsigned char data_in; | |
139 | unsigned char reserved; | |
140 | ||
141 | unsigned int data_transfer_length; | |
142 | ||
143 | union { | |
144 | unsigned char cdb[CDB16GENERIC_LENGTH]; | |
145 | unsigned char sense_data[SENSE_BUFFER_SIZE]; | |
146 | unsigned char reserved_array[MAX_DATA_BUF_LEN_WITH_PADDING]; | |
147 | }; | |
148 | } __attribute((packed)); | |
149 | ||
150 | ||
151 | /* | |
152 | * This structure is sent during the intialization phase to get the different | |
153 | * properties of the channel. | |
154 | */ | |
155 | struct vmstorage_channel_properties { | |
156 | unsigned short protocol_version; | |
157 | unsigned char path_id; | |
158 | unsigned char target_id; | |
159 | ||
160 | /* Note: port number is only really known on the client side */ | |
161 | unsigned int port_number; | |
162 | unsigned int flags; | |
163 | unsigned int max_transfer_bytes; | |
164 | ||
165 | /* This id is unique for each channel and will correspond with */ | |
166 | /* vendor specific data in the inquirydata */ | |
167 | unsigned long long unique_id; | |
168 | } __packed; | |
169 | ||
170 | /* This structure is sent during the storage protocol negotiations. */ | |
171 | struct vmstorage_protocol_version { | |
172 | /* Major (MSW) and minor (LSW) version numbers. */ | |
173 | unsigned short major_minor; | |
174 | ||
175 | /* | |
176 | * Revision number is auto-incremented whenever this file is changed | |
177 | * (See FILL_VMSTOR_REVISION macro above). Mismatch does not | |
178 | * definitely indicate incompatibility--but it does indicate mismatched | |
179 | * builds. | |
180 | */ | |
181 | unsigned short revision; | |
182 | } __packed; | |
183 | ||
184 | /* Channel Property Flags */ | |
185 | #define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1 | |
186 | #define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2 | |
187 | ||
188 | struct vstor_packet { | |
189 | /* Requested operation type */ | |
190 | enum vstor_packet_operation operation; | |
191 | ||
192 | /* Flags - see below for values */ | |
193 | unsigned int flags; | |
194 | ||
195 | /* Status of the request returned from the server side. */ | |
196 | unsigned int status; | |
197 | ||
198 | /* Data payload area */ | |
199 | union { | |
200 | /* | |
201 | * Structure used to forward SCSI commands from the | |
202 | * client to the server. | |
203 | */ | |
204 | struct vmscsi_request vm_srb; | |
205 | ||
206 | /* Structure used to query channel properties. */ | |
207 | struct vmstorage_channel_properties storage_channel_properties; | |
208 | ||
209 | /* Used during version negotiations. */ | |
210 | struct vmstorage_protocol_version version; | |
211 | }; | |
212 | } __packed; | |
213 | ||
214 | /* Packet flags */ | |
215 | /* | |
216 | * This flag indicates that the server should send back a completion for this | |
217 | * packet. | |
218 | */ | |
219 | #define REQUEST_COMPLETION_FLAG 0x1 | |
220 | ||
221 | /* This is the set of flags that the vsc can set in any packets it sends */ | |
222 | #define VSC_LEGAL_FLAGS (REQUEST_COMPLETION_FLAG) | |
223 | ||
224 | ||
225 | /* Defines */ | |
f0d79fe9 S |
226 | |
227 | #define STORVSC_MAX_IO_REQUESTS 128 | |
228 | ||
229 | /* | |
230 | * In Hyper-V, each port/path/target maps to 1 scsi host adapter. In | |
231 | * reality, the path/target is not used (ie always set to 0) so our | |
232 | * scsi host adapter essentially has 1 bus with 1 target that contains | |
233 | * up to 256 luns. | |
234 | */ | |
235 | #define STORVSC_MAX_LUNS_PER_TARGET 64 | |
236 | #define STORVSC_MAX_TARGETS 1 | |
237 | #define STORVSC_MAX_CHANNELS 1 | |
cf55f4a8 | 238 | #define STORVSC_MAX_CMD_LEN 16 |
f0d79fe9 | 239 | |
f0d79fe9 S |
240 | /* Matches Windows-end */ |
241 | enum storvsc_request_type { | |
242 | WRITE_TYPE, | |
243 | READ_TYPE, | |
244 | UNKNOWN_TYPE, | |
245 | }; | |
246 | ||
247 | ||
248 | struct hv_storvsc_request { | |
f0d79fe9 S |
249 | struct hv_device *device; |
250 | ||
251 | /* Synchronize the request/response if needed */ | |
252 | struct completion wait_event; | |
253 | ||
254 | unsigned char *sense_buffer; | |
255 | void *context; | |
256 | void (*on_io_completion)(struct hv_storvsc_request *request); | |
257 | struct hv_multipage_buffer data_buffer; | |
258 | ||
259 | struct vstor_packet vstor_packet; | |
260 | }; | |
261 | ||
262 | ||
f0d79fe9 S |
263 | /* A storvsc device is a device object that contains a vmbus channel */ |
264 | struct storvsc_device { | |
265 | struct hv_device *device; | |
266 | ||
267 | bool destroy; | |
268 | bool drain_notify; | |
269 | atomic_t num_outstanding_req; | |
cd654ea1 | 270 | struct Scsi_Host *host; |
f0d79fe9 S |
271 | |
272 | wait_queue_head_t waiting_to_drain; | |
273 | ||
274 | /* | |
275 | * Each unique Port/Path/Target represents 1 channel ie scsi | |
276 | * controller. In reality, the pathid, targetid is always 0 | |
277 | * and the port is set by us | |
278 | */ | |
279 | unsigned int port_number; | |
280 | unsigned char path_id; | |
281 | unsigned char target_id; | |
282 | ||
283 | /* Used for vsc/vsp channel reset process */ | |
284 | struct hv_storvsc_request init_request; | |
285 | struct hv_storvsc_request reset_request; | |
286 | }; | |
287 | ||
c1b3d067 S |
288 | struct hv_host_device { |
289 | struct hv_device *dev; | |
290 | struct kmem_cache *request_pool; | |
4e03e697 | 291 | mempool_t *request_mempool; |
c1b3d067 S |
292 | unsigned int port; |
293 | unsigned char path; | |
294 | unsigned char target; | |
295 | }; | |
296 | ||
297 | struct storvsc_cmd_request { | |
298 | struct list_head entry; | |
299 | struct scsi_cmnd *cmd; | |
300 | ||
301 | unsigned int bounce_sgl_count; | |
302 | struct scatterlist *bounce_sgl; | |
303 | ||
304 | struct hv_storvsc_request request; | |
305 | }; | |
f0d79fe9 | 306 | |
12675799 S |
307 | struct storvsc_scan_work { |
308 | struct work_struct work; | |
309 | struct Scsi_Host *host; | |
310 | uint lun; | |
311 | }; | |
312 | ||
313 | static void storvsc_bus_scan(struct work_struct *work) | |
314 | { | |
315 | struct storvsc_scan_work *wrk; | |
316 | int id, order_id; | |
317 | ||
318 | wrk = container_of(work, struct storvsc_scan_work, work); | |
319 | for (id = 0; id < wrk->host->max_id; ++id) { | |
320 | if (wrk->host->reverse_ordering) | |
321 | order_id = wrk->host->max_id - id - 1; | |
322 | else | |
323 | order_id = id; | |
324 | ||
325 | scsi_scan_target(&wrk->host->shost_gendev, 0, | |
326 | order_id, SCAN_WILD_CARD, 1); | |
327 | } | |
328 | kfree(wrk); | |
329 | } | |
330 | ||
b4017319 S |
331 | static void storvsc_remove_lun(struct work_struct *work) |
332 | { | |
333 | struct storvsc_scan_work *wrk; | |
334 | struct scsi_device *sdev; | |
335 | ||
336 | wrk = container_of(work, struct storvsc_scan_work, work); | |
337 | if (!scsi_host_get(wrk->host)) | |
338 | goto done; | |
339 | ||
340 | sdev = scsi_device_lookup(wrk->host, 0, 0, wrk->lun); | |
341 | ||
342 | if (sdev) { | |
343 | scsi_remove_device(sdev); | |
344 | scsi_device_put(sdev); | |
345 | } | |
346 | scsi_host_put(wrk->host); | |
347 | ||
348 | done: | |
349 | kfree(wrk); | |
350 | } | |
351 | ||
f0d79fe9 S |
352 | static inline struct storvsc_device *get_out_stor_device( |
353 | struct hv_device *device) | |
354 | { | |
355 | struct storvsc_device *stor_device; | |
356 | ||
cd654ea1 | 357 | stor_device = hv_get_drvdata(device); |
f0d79fe9 S |
358 | |
359 | if (stor_device && stor_device->destroy) | |
360 | stor_device = NULL; | |
361 | ||
362 | return stor_device; | |
363 | } | |
364 | ||
365 | ||
366 | static inline void storvsc_wait_to_drain(struct storvsc_device *dev) | |
367 | { | |
368 | dev->drain_notify = true; | |
369 | wait_event(dev->waiting_to_drain, | |
370 | atomic_read(&dev->num_outstanding_req) == 0); | |
371 | dev->drain_notify = false; | |
372 | } | |
bef4a34a | 373 | |
8dcf37d4 S |
374 | static inline struct storvsc_device *get_in_stor_device( |
375 | struct hv_device *device) | |
376 | { | |
377 | struct storvsc_device *stor_device; | |
8dcf37d4 | 378 | |
cd654ea1 | 379 | stor_device = hv_get_drvdata(device); |
8dcf37d4 S |
380 | |
381 | if (!stor_device) | |
382 | goto get_in_err; | |
383 | ||
384 | /* | |
385 | * If the device is being destroyed; allow incoming | |
386 | * traffic only to cleanup outstanding requests. | |
387 | */ | |
388 | ||
389 | if (stor_device->destroy && | |
390 | (atomic_read(&stor_device->num_outstanding_req) == 0)) | |
391 | stor_device = NULL; | |
392 | ||
393 | get_in_err: | |
8dcf37d4 S |
394 | return stor_device; |
395 | ||
396 | } | |
397 | ||
398 | static int storvsc_channel_init(struct hv_device *device) | |
399 | { | |
400 | struct storvsc_device *stor_device; | |
401 | struct hv_storvsc_request *request; | |
402 | struct vstor_packet *vstor_packet; | |
403 | int ret, t; | |
404 | ||
405 | stor_device = get_out_stor_device(device); | |
406 | if (!stor_device) | |
407 | return -ENODEV; | |
408 | ||
409 | request = &stor_device->init_request; | |
410 | vstor_packet = &request->vstor_packet; | |
411 | ||
412 | /* | |
413 | * Now, initiate the vsc/vsp initialization protocol on the open | |
414 | * channel | |
415 | */ | |
416 | memset(request, 0, sizeof(struct hv_storvsc_request)); | |
417 | init_completion(&request->wait_event); | |
418 | vstor_packet->operation = VSTOR_OPERATION_BEGIN_INITIALIZATION; | |
419 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; | |
420 | ||
421 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
422 | sizeof(struct vstor_packet), | |
423 | (unsigned long)request, | |
424 | VM_PKT_DATA_INBAND, | |
425 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
426 | if (ret != 0) | |
427 | goto cleanup; | |
428 | ||
429 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); | |
430 | if (t == 0) { | |
431 | ret = -ETIMEDOUT; | |
432 | goto cleanup; | |
433 | } | |
434 | ||
435 | if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || | |
436 | vstor_packet->status != 0) | |
437 | goto cleanup; | |
438 | ||
439 | ||
440 | /* reuse the packet for version range supported */ | |
441 | memset(vstor_packet, 0, sizeof(struct vstor_packet)); | |
442 | vstor_packet->operation = VSTOR_OPERATION_QUERY_PROTOCOL_VERSION; | |
443 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; | |
444 | ||
445 | vstor_packet->version.major_minor = VMSTOR_PROTOCOL_VERSION_CURRENT; | |
446 | FILL_VMSTOR_REVISION(vstor_packet->version.revision); | |
447 | ||
448 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
449 | sizeof(struct vstor_packet), | |
450 | (unsigned long)request, | |
451 | VM_PKT_DATA_INBAND, | |
452 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
453 | if (ret != 0) | |
454 | goto cleanup; | |
455 | ||
456 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); | |
457 | if (t == 0) { | |
458 | ret = -ETIMEDOUT; | |
459 | goto cleanup; | |
460 | } | |
461 | ||
462 | if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || | |
463 | vstor_packet->status != 0) | |
464 | goto cleanup; | |
465 | ||
466 | ||
467 | memset(vstor_packet, 0, sizeof(struct vstor_packet)); | |
468 | vstor_packet->operation = VSTOR_OPERATION_QUERY_PROPERTIES; | |
469 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; | |
470 | vstor_packet->storage_channel_properties.port_number = | |
471 | stor_device->port_number; | |
472 | ||
473 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
474 | sizeof(struct vstor_packet), | |
475 | (unsigned long)request, | |
476 | VM_PKT_DATA_INBAND, | |
477 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
478 | ||
479 | if (ret != 0) | |
480 | goto cleanup; | |
481 | ||
482 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); | |
483 | if (t == 0) { | |
484 | ret = -ETIMEDOUT; | |
485 | goto cleanup; | |
486 | } | |
487 | ||
488 | if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || | |
489 | vstor_packet->status != 0) | |
490 | goto cleanup; | |
491 | ||
492 | stor_device->path_id = vstor_packet->storage_channel_properties.path_id; | |
493 | stor_device->target_id | |
494 | = vstor_packet->storage_channel_properties.target_id; | |
495 | ||
496 | memset(vstor_packet, 0, sizeof(struct vstor_packet)); | |
497 | vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION; | |
498 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; | |
499 | ||
500 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
501 | sizeof(struct vstor_packet), | |
502 | (unsigned long)request, | |
503 | VM_PKT_DATA_INBAND, | |
504 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
505 | ||
506 | if (ret != 0) | |
507 | goto cleanup; | |
508 | ||
509 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); | |
510 | if (t == 0) { | |
511 | ret = -ETIMEDOUT; | |
512 | goto cleanup; | |
513 | } | |
514 | ||
515 | if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || | |
516 | vstor_packet->status != 0) | |
517 | goto cleanup; | |
518 | ||
519 | ||
520 | cleanup: | |
521 | return ret; | |
522 | } | |
523 | ||
524 | static void storvsc_on_io_completion(struct hv_device *device, | |
525 | struct vstor_packet *vstor_packet, | |
526 | struct hv_storvsc_request *request) | |
527 | { | |
528 | struct storvsc_device *stor_device; | |
529 | struct vstor_packet *stor_pkt; | |
530 | ||
cd654ea1 | 531 | stor_device = hv_get_drvdata(device); |
8dcf37d4 S |
532 | stor_pkt = &request->vstor_packet; |
533 | ||
4ed51a21 S |
534 | /* |
535 | * The current SCSI handling on the host side does | |
536 | * not correctly handle: | |
537 | * INQUIRY command with page code parameter set to 0x80 | |
538 | * MODE_SENSE command with cmd[2] == 0x1c | |
539 | * | |
540 | * Setup srb and scsi status so this won't be fatal. | |
541 | * We do this so we can distinguish truly fatal failues | |
542 | * (srb status == 0x4) and off-line the device in that case. | |
543 | */ | |
544 | ||
545 | if ((stor_pkt->vm_srb.cdb[0] == INQUIRY) || | |
546 | (stor_pkt->vm_srb.cdb[0] == MODE_SENSE)) { | |
547 | vstor_packet->vm_srb.scsi_status = 0; | |
548 | vstor_packet->vm_srb.srb_status = 0x1; | |
549 | } | |
550 | ||
8dcf37d4 S |
551 | |
552 | /* Copy over the status...etc */ | |
553 | stor_pkt->vm_srb.scsi_status = vstor_packet->vm_srb.scsi_status; | |
554 | stor_pkt->vm_srb.srb_status = vstor_packet->vm_srb.srb_status; | |
555 | stor_pkt->vm_srb.sense_info_length = | |
556 | vstor_packet->vm_srb.sense_info_length; | |
557 | ||
558 | if (vstor_packet->vm_srb.scsi_status != 0 || | |
559 | vstor_packet->vm_srb.srb_status != 1){ | |
d181daa0 GKH |
560 | dev_warn(&device->device, |
561 | "cmd 0x%x scsi status 0x%x srb status 0x%x\n", | |
562 | stor_pkt->vm_srb.cdb[0], | |
563 | vstor_packet->vm_srb.scsi_status, | |
564 | vstor_packet->vm_srb.srb_status); | |
8dcf37d4 S |
565 | } |
566 | ||
567 | if ((vstor_packet->vm_srb.scsi_status & 0xFF) == 0x02) { | |
568 | /* CHECK_CONDITION */ | |
569 | if (vstor_packet->vm_srb.srb_status & 0x80) { | |
570 | /* autosense data available */ | |
d181daa0 | 571 | dev_warn(&device->device, |
41098f8f S |
572 | "stor pkt %p autosense data valid - len %d\n", |
573 | request, | |
574 | vstor_packet->vm_srb.sense_info_length); | |
8dcf37d4 S |
575 | |
576 | memcpy(request->sense_buffer, | |
577 | vstor_packet->vm_srb.sense_data, | |
578 | vstor_packet->vm_srb.sense_info_length); | |
579 | ||
580 | } | |
581 | } | |
582 | ||
583 | stor_pkt->vm_srb.data_transfer_length = | |
584 | vstor_packet->vm_srb.data_transfer_length; | |
585 | ||
586 | request->on_io_completion(request); | |
587 | ||
588 | if (atomic_dec_and_test(&stor_device->num_outstanding_req) && | |
589 | stor_device->drain_notify) | |
590 | wake_up(&stor_device->waiting_to_drain); | |
591 | ||
592 | ||
593 | } | |
594 | ||
595 | static void storvsc_on_receive(struct hv_device *device, | |
596 | struct vstor_packet *vstor_packet, | |
597 | struct hv_storvsc_request *request) | |
598 | { | |
12675799 S |
599 | struct storvsc_scan_work *work; |
600 | struct storvsc_device *stor_device; | |
601 | ||
8dcf37d4 S |
602 | switch (vstor_packet->operation) { |
603 | case VSTOR_OPERATION_COMPLETE_IO: | |
604 | storvsc_on_io_completion(device, vstor_packet, request); | |
605 | break; | |
12675799 | 606 | |
8dcf37d4 | 607 | case VSTOR_OPERATION_REMOVE_DEVICE: |
12675799 S |
608 | case VSTOR_OPERATION_ENUMERATE_BUS: |
609 | stor_device = get_in_stor_device(device); | |
610 | work = kmalloc(sizeof(struct storvsc_scan_work), GFP_ATOMIC); | |
611 | if (!work) | |
612 | return; | |
613 | ||
614 | INIT_WORK(&work->work, storvsc_bus_scan); | |
615 | work->host = stor_device->host; | |
616 | schedule_work(&work->work); | |
617 | break; | |
8dcf37d4 S |
618 | |
619 | default: | |
620 | break; | |
621 | } | |
622 | } | |
623 | ||
624 | static void storvsc_on_channel_callback(void *context) | |
625 | { | |
626 | struct hv_device *device = (struct hv_device *)context; | |
627 | struct storvsc_device *stor_device; | |
628 | u32 bytes_recvd; | |
629 | u64 request_id; | |
630 | unsigned char packet[ALIGN(sizeof(struct vstor_packet), 8)]; | |
631 | struct hv_storvsc_request *request; | |
632 | int ret; | |
633 | ||
634 | ||
635 | stor_device = get_in_stor_device(device); | |
636 | if (!stor_device) | |
637 | return; | |
638 | ||
639 | do { | |
640 | ret = vmbus_recvpacket(device->channel, packet, | |
641 | ALIGN(sizeof(struct vstor_packet), 8), | |
642 | &bytes_recvd, &request_id); | |
643 | if (ret == 0 && bytes_recvd > 0) { | |
644 | ||
645 | request = (struct hv_storvsc_request *) | |
646 | (unsigned long)request_id; | |
647 | ||
648 | if ((request == &stor_device->init_request) || | |
649 | (request == &stor_device->reset_request)) { | |
650 | ||
651 | memcpy(&request->vstor_packet, packet, | |
652 | sizeof(struct vstor_packet)); | |
653 | complete(&request->wait_event); | |
654 | } else { | |
655 | storvsc_on_receive(device, | |
656 | (struct vstor_packet *)packet, | |
657 | request); | |
658 | } | |
659 | } else { | |
660 | break; | |
661 | } | |
662 | } while (1); | |
663 | ||
664 | return; | |
665 | } | |
666 | ||
667 | static int storvsc_connect_to_vsp(struct hv_device *device, u32 ring_size) | |
668 | { | |
669 | struct vmstorage_channel_properties props; | |
670 | int ret; | |
671 | ||
672 | memset(&props, 0, sizeof(struct vmstorage_channel_properties)); | |
673 | ||
674 | /* Open the channel */ | |
675 | ret = vmbus_open(device->channel, | |
676 | ring_size, | |
677 | ring_size, | |
678 | (void *)&props, | |
679 | sizeof(struct vmstorage_channel_properties), | |
680 | storvsc_on_channel_callback, device); | |
681 | ||
682 | if (ret != 0) | |
683 | return ret; | |
684 | ||
685 | ret = storvsc_channel_init(device); | |
686 | ||
687 | return ret; | |
688 | } | |
689 | ||
c1b3d067 | 690 | static int storvsc_dev_remove(struct hv_device *device) |
8dcf37d4 S |
691 | { |
692 | struct storvsc_device *stor_device; | |
693 | unsigned long flags; | |
694 | ||
cd654ea1 | 695 | stor_device = hv_get_drvdata(device); |
8dcf37d4 S |
696 | |
697 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
698 | stor_device->destroy = true; | |
699 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); | |
700 | ||
701 | /* | |
702 | * At this point, all outbound traffic should be disable. We | |
703 | * only allow inbound traffic (responses) to proceed so that | |
704 | * outstanding requests can be completed. | |
705 | */ | |
706 | ||
707 | storvsc_wait_to_drain(stor_device); | |
708 | ||
709 | /* | |
710 | * Since we have already drained, we don't need to busy wait | |
711 | * as was done in final_release_stor_device() | |
712 | * Note that we cannot set the ext pointer to NULL until | |
713 | * we have drained - to drain the outgoing packets, we need to | |
714 | * allow incoming packets. | |
715 | */ | |
716 | spin_lock_irqsave(&device->channel->inbound_lock, flags); | |
cd654ea1 | 717 | hv_set_drvdata(device, NULL); |
8dcf37d4 S |
718 | spin_unlock_irqrestore(&device->channel->inbound_lock, flags); |
719 | ||
720 | /* Close the channel */ | |
721 | vmbus_close(device->channel); | |
722 | ||
723 | kfree(stor_device); | |
724 | return 0; | |
725 | } | |
726 | ||
c1b3d067 | 727 | static int storvsc_do_io(struct hv_device *device, |
8dcf37d4 S |
728 | struct hv_storvsc_request *request) |
729 | { | |
730 | struct storvsc_device *stor_device; | |
731 | struct vstor_packet *vstor_packet; | |
732 | int ret = 0; | |
733 | ||
734 | vstor_packet = &request->vstor_packet; | |
735 | stor_device = get_out_stor_device(device); | |
736 | ||
737 | if (!stor_device) | |
738 | return -ENODEV; | |
739 | ||
740 | ||
741 | request->device = device; | |
742 | ||
743 | ||
744 | vstor_packet->flags |= REQUEST_COMPLETION_FLAG; | |
745 | ||
746 | vstor_packet->vm_srb.length = sizeof(struct vmscsi_request); | |
747 | ||
748 | ||
749 | vstor_packet->vm_srb.sense_info_length = SENSE_BUFFER_SIZE; | |
750 | ||
751 | ||
752 | vstor_packet->vm_srb.data_transfer_length = | |
753 | request->data_buffer.len; | |
754 | ||
755 | vstor_packet->operation = VSTOR_OPERATION_EXECUTE_SRB; | |
756 | ||
757 | if (request->data_buffer.len) { | |
758 | ret = vmbus_sendpacket_multipagebuffer(device->channel, | |
759 | &request->data_buffer, | |
760 | vstor_packet, | |
761 | sizeof(struct vstor_packet), | |
762 | (unsigned long)request); | |
763 | } else { | |
764 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
765 | sizeof(struct vstor_packet), | |
766 | (unsigned long)request, | |
767 | VM_PKT_DATA_INBAND, | |
768 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
769 | } | |
770 | ||
771 | if (ret != 0) | |
772 | return ret; | |
773 | ||
774 | atomic_inc(&stor_device->num_outstanding_req); | |
775 | ||
776 | return ret; | |
777 | } | |
778 | ||
bd1f5d6a S |
779 | static void storvsc_get_ide_info(struct hv_device *dev, int *target, int *path) |
780 | { | |
781 | *target = | |
782 | dev->dev_instance.b[5] << 8 | dev->dev_instance.b[4]; | |
783 | ||
784 | *path = | |
785 | dev->dev_instance.b[3] << 24 | | |
786 | dev->dev_instance.b[2] << 16 | | |
787 | dev->dev_instance.b[1] << 8 | dev->dev_instance.b[0]; | |
788 | } | |
789 | ||
bef4a34a | 790 | |
5b60acee S |
791 | static int storvsc_device_alloc(struct scsi_device *sdevice) |
792 | { | |
793 | /* | |
794 | * This enables luns to be located sparsely. Otherwise, we may not | |
795 | * discovered them. | |
796 | */ | |
797 | sdevice->sdev_bflags |= BLIST_SPARSELUN | BLIST_LARGELUN; | |
798 | return 0; | |
799 | } | |
800 | ||
a1ebfeae S |
801 | static int storvsc_merge_bvec(struct request_queue *q, |
802 | struct bvec_merge_data *bmd, struct bio_vec *bvec) | |
803 | { | |
804 | /* checking done by caller. */ | |
805 | return bvec->bv_len; | |
806 | } | |
807 | ||
419f2d03 S |
808 | static int storvsc_device_configure(struct scsi_device *sdevice) |
809 | { | |
810 | scsi_adjust_queue_depth(sdevice, MSG_SIMPLE_TAG, | |
811 | STORVSC_MAX_IO_REQUESTS); | |
812 | ||
419f2d03 S |
813 | blk_queue_max_segment_size(sdevice->request_queue, PAGE_SIZE); |
814 | ||
419f2d03 S |
815 | blk_queue_merge_bvec(sdevice->request_queue, storvsc_merge_bvec); |
816 | ||
817 | blk_queue_bounce_limit(sdevice->request_queue, BLK_BOUNCE_ANY); | |
419f2d03 S |
818 | |
819 | return 0; | |
820 | } | |
821 | ||
49a3c7a9 S |
822 | static void destroy_bounce_buffer(struct scatterlist *sgl, |
823 | unsigned int sg_count) | |
824 | { | |
825 | int i; | |
826 | struct page *page_buf; | |
827 | ||
828 | for (i = 0; i < sg_count; i++) { | |
829 | page_buf = sg_page((&sgl[i])); | |
830 | if (page_buf != NULL) | |
831 | __free_page(page_buf); | |
832 | } | |
833 | ||
834 | kfree(sgl); | |
835 | } | |
836 | ||
3862ef3e S |
837 | static int do_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count) |
838 | { | |
839 | int i; | |
840 | ||
841 | /* No need to check */ | |
842 | if (sg_count < 2) | |
843 | return -1; | |
844 | ||
845 | /* We have at least 2 sg entries */ | |
846 | for (i = 0; i < sg_count; i++) { | |
847 | if (i == 0) { | |
848 | /* make sure 1st one does not have hole */ | |
849 | if (sgl[i].offset + sgl[i].length != PAGE_SIZE) | |
850 | return i; | |
851 | } else if (i == sg_count - 1) { | |
852 | /* make sure last one does not have hole */ | |
853 | if (sgl[i].offset != 0) | |
854 | return i; | |
855 | } else { | |
856 | /* make sure no hole in the middle */ | |
857 | if (sgl[i].length != PAGE_SIZE || sgl[i].offset != 0) | |
858 | return i; | |
859 | } | |
860 | } | |
861 | return -1; | |
862 | } | |
863 | ||
a9753cbd S |
864 | static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl, |
865 | unsigned int sg_count, | |
866 | unsigned int len) | |
867 | { | |
868 | int i; | |
869 | int num_pages; | |
870 | struct scatterlist *bounce_sgl; | |
871 | struct page *page_buf; | |
872 | ||
873 | num_pages = ALIGN(len, PAGE_SIZE) >> PAGE_SHIFT; | |
874 | ||
875 | bounce_sgl = kcalloc(num_pages, sizeof(struct scatterlist), GFP_ATOMIC); | |
876 | if (!bounce_sgl) | |
877 | return NULL; | |
878 | ||
879 | for (i = 0; i < num_pages; i++) { | |
880 | page_buf = alloc_page(GFP_ATOMIC); | |
881 | if (!page_buf) | |
882 | goto cleanup; | |
883 | sg_set_page(&bounce_sgl[i], page_buf, 0, 0); | |
884 | } | |
885 | ||
886 | return bounce_sgl; | |
887 | ||
888 | cleanup: | |
889 | destroy_bounce_buffer(bounce_sgl, num_pages); | |
890 | return NULL; | |
891 | } | |
892 | ||
29fe2c9b S |
893 | |
894 | /* Assume the original sgl has enough room */ | |
895 | static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, | |
896 | struct scatterlist *bounce_sgl, | |
897 | unsigned int orig_sgl_count) | |
898 | { | |
899 | int i; | |
900 | int j = 0; | |
901 | unsigned long src, dest; | |
902 | unsigned int srclen, destlen, copylen; | |
903 | unsigned int total_copied = 0; | |
904 | unsigned long bounce_addr = 0; | |
905 | unsigned long dest_addr = 0; | |
906 | unsigned long flags; | |
907 | ||
908 | local_irq_save(flags); | |
909 | ||
910 | for (i = 0; i < orig_sgl_count; i++) { | |
911 | dest_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), | |
912 | KM_IRQ0) + orig_sgl[i].offset; | |
913 | dest = dest_addr; | |
914 | destlen = orig_sgl[i].length; | |
915 | ||
916 | if (bounce_addr == 0) | |
917 | bounce_addr = | |
918 | (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), | |
919 | KM_IRQ0); | |
920 | ||
921 | while (destlen) { | |
922 | src = bounce_addr + bounce_sgl[j].offset; | |
923 | srclen = bounce_sgl[j].length - bounce_sgl[j].offset; | |
924 | ||
925 | copylen = min(srclen, destlen); | |
926 | memcpy((void *)dest, (void *)src, copylen); | |
927 | ||
928 | total_copied += copylen; | |
929 | bounce_sgl[j].offset += copylen; | |
930 | destlen -= copylen; | |
931 | dest += copylen; | |
932 | ||
933 | if (bounce_sgl[j].offset == bounce_sgl[j].length) { | |
934 | /* full */ | |
935 | kunmap_atomic((void *)bounce_addr, KM_IRQ0); | |
936 | j++; | |
937 | ||
938 | /* if we need to use another bounce buffer */ | |
939 | if (destlen || i != orig_sgl_count - 1) | |
940 | bounce_addr = | |
941 | (unsigned long)kmap_atomic( | |
942 | sg_page((&bounce_sgl[j])), KM_IRQ0); | |
943 | } else if (destlen == 0 && i == orig_sgl_count - 1) { | |
944 | /* unmap the last bounce that is < PAGE_SIZE */ | |
945 | kunmap_atomic((void *)bounce_addr, KM_IRQ0); | |
946 | } | |
947 | } | |
948 | ||
949 | kunmap_atomic((void *)(dest_addr - orig_sgl[i].offset), | |
950 | KM_IRQ0); | |
951 | } | |
952 | ||
953 | local_irq_restore(flags); | |
954 | ||
955 | return total_copied; | |
956 | } | |
957 | ||
6a8ff44b S |
958 | |
959 | /* Assume the bounce_sgl has enough room ie using the create_bounce_buffer() */ | |
960 | static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, | |
961 | struct scatterlist *bounce_sgl, | |
962 | unsigned int orig_sgl_count) | |
963 | { | |
964 | int i; | |
965 | int j = 0; | |
966 | unsigned long src, dest; | |
967 | unsigned int srclen, destlen, copylen; | |
968 | unsigned int total_copied = 0; | |
969 | unsigned long bounce_addr = 0; | |
970 | unsigned long src_addr = 0; | |
971 | unsigned long flags; | |
972 | ||
973 | local_irq_save(flags); | |
974 | ||
975 | for (i = 0; i < orig_sgl_count; i++) { | |
976 | src_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), | |
977 | KM_IRQ0) + orig_sgl[i].offset; | |
978 | src = src_addr; | |
979 | srclen = orig_sgl[i].length; | |
980 | ||
981 | if (bounce_addr == 0) | |
982 | bounce_addr = | |
983 | (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), | |
984 | KM_IRQ0); | |
985 | ||
986 | while (srclen) { | |
987 | /* assume bounce offset always == 0 */ | |
988 | dest = bounce_addr + bounce_sgl[j].length; | |
989 | destlen = PAGE_SIZE - bounce_sgl[j].length; | |
990 | ||
991 | copylen = min(srclen, destlen); | |
992 | memcpy((void *)dest, (void *)src, copylen); | |
993 | ||
994 | total_copied += copylen; | |
995 | bounce_sgl[j].length += copylen; | |
996 | srclen -= copylen; | |
997 | src += copylen; | |
998 | ||
999 | if (bounce_sgl[j].length == PAGE_SIZE) { | |
1000 | /* full..move to next entry */ | |
1001 | kunmap_atomic((void *)bounce_addr, KM_IRQ0); | |
1002 | j++; | |
1003 | ||
1004 | /* if we need to use another bounce buffer */ | |
1005 | if (srclen || i != orig_sgl_count - 1) | |
1006 | bounce_addr = | |
1007 | (unsigned long)kmap_atomic( | |
1008 | sg_page((&bounce_sgl[j])), KM_IRQ0); | |
1009 | ||
1010 | } else if (srclen == 0 && i == orig_sgl_count - 1) { | |
1011 | /* unmap the last bounce that is < PAGE_SIZE */ | |
1012 | kunmap_atomic((void *)bounce_addr, KM_IRQ0); | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | kunmap_atomic((void *)(src_addr - orig_sgl[i].offset), KM_IRQ0); | |
1017 | } | |
1018 | ||
1019 | local_irq_restore(flags); | |
1020 | ||
1021 | return total_copied; | |
1022 | } | |
1023 | ||
5c5c0234 | 1024 | |
5c5c0234 S |
1025 | static int storvsc_remove(struct hv_device *dev) |
1026 | { | |
cd654ea1 S |
1027 | struct storvsc_device *stor_device = hv_get_drvdata(dev); |
1028 | struct Scsi_Host *host = stor_device->host; | |
7f33f30a | 1029 | struct hv_host_device *host_dev = shost_priv(host); |
5c5c0234 | 1030 | |
2935a407 S |
1031 | scsi_remove_host(host); |
1032 | ||
2935a407 | 1033 | scsi_host_put(host); |
d36b0a03 | 1034 | |
6cdc57c0 | 1035 | storvsc_dev_remove(dev); |
5c5c0234 | 1036 | if (host_dev->request_pool) { |
4e03e697 | 1037 | mempool_destroy(host_dev->request_mempool); |
5c5c0234 S |
1038 | kmem_cache_destroy(host_dev->request_pool); |
1039 | host_dev->request_pool = NULL; | |
4e03e697 | 1040 | host_dev->request_mempool = NULL; |
5c5c0234 | 1041 | } |
5c5c0234 S |
1042 | return 0; |
1043 | } | |
1044 | ||
62838ce2 S |
1045 | |
1046 | static int storvsc_get_chs(struct scsi_device *sdev, struct block_device * bdev, | |
1047 | sector_t capacity, int *info) | |
1048 | { | |
5326fd5c S |
1049 | sector_t nsect = capacity; |
1050 | sector_t cylinders = nsect; | |
1051 | int heads, sectors_pt; | |
62838ce2 | 1052 | |
5326fd5c S |
1053 | /* |
1054 | * We are making up these values; let us keep it simple. | |
1055 | */ | |
1056 | heads = 0xff; | |
1057 | sectors_pt = 0x3f; /* Sectors per track */ | |
1058 | sector_div(cylinders, heads * sectors_pt); | |
1059 | if ((sector_t)(cylinders + 1) * heads * sectors_pt < nsect) | |
1060 | cylinders = 0xffff; | |
62838ce2 S |
1061 | |
1062 | info[0] = heads; | |
5326fd5c S |
1063 | info[1] = sectors_pt; |
1064 | info[2] = (int)cylinders; | |
62838ce2 | 1065 | |
62838ce2 S |
1066 | return 0; |
1067 | } | |
aa3d789e S |
1068 | |
1069 | static int storvsc_host_reset(struct hv_device *device) | |
1070 | { | |
1071 | struct storvsc_device *stor_device; | |
1072 | struct hv_storvsc_request *request; | |
1073 | struct vstor_packet *vstor_packet; | |
1074 | int ret, t; | |
1075 | ||
aa3d789e | 1076 | |
1eaaddf9 | 1077 | stor_device = get_out_stor_device(device); |
aa3d789e | 1078 | if (!stor_device) |
a00e8224 | 1079 | return FAILED; |
aa3d789e S |
1080 | |
1081 | request = &stor_device->reset_request; | |
1082 | vstor_packet = &request->vstor_packet; | |
1083 | ||
1084 | init_completion(&request->wait_event); | |
1085 | ||
1086 | vstor_packet->operation = VSTOR_OPERATION_RESET_BUS; | |
1087 | vstor_packet->flags = REQUEST_COMPLETION_FLAG; | |
1088 | vstor_packet->vm_srb.path_id = stor_device->path_id; | |
1089 | ||
1090 | ret = vmbus_sendpacket(device->channel, vstor_packet, | |
1091 | sizeof(struct vstor_packet), | |
1092 | (unsigned long)&stor_device->reset_request, | |
1093 | VM_PKT_DATA_INBAND, | |
1094 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1095 | if (ret != 0) | |
a00e8224 | 1096 | return FAILED; |
aa3d789e | 1097 | |
46d2eb6d | 1098 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
a00e8224 S |
1099 | if (t == 0) |
1100 | return TIMEOUT_ERROR; | |
aa3d789e | 1101 | |
aa3d789e S |
1102 | |
1103 | /* | |
1104 | * At this point, all outstanding requests in the adapter | |
1105 | * should have been flushed out and return to us | |
1106 | */ | |
1107 | ||
a00e8224 | 1108 | return SUCCESS; |
aa3d789e S |
1109 | } |
1110 | ||
1111 | ||
96e690be S |
1112 | /* |
1113 | * storvsc_host_reset_handler - Reset the scsi HBA | |
1114 | */ | |
1115 | static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) | |
1116 | { | |
7f33f30a | 1117 | struct hv_host_device *host_dev = shost_priv(scmnd->device->host); |
96e690be S |
1118 | struct hv_device *dev = host_dev->dev; |
1119 | ||
a00e8224 | 1120 | return storvsc_host_reset(dev); |
96e690be S |
1121 | } |
1122 | ||
8a411bad S |
1123 | |
1124 | /* | |
b8de73df | 1125 | * storvsc_command_completion - Command completion processing |
8a411bad | 1126 | */ |
b8de73df | 1127 | static void storvsc_command_completion(struct hv_storvsc_request *request) |
8a411bad S |
1128 | { |
1129 | struct storvsc_cmd_request *cmd_request = | |
1130 | (struct storvsc_cmd_request *)request->context; | |
1131 | struct scsi_cmnd *scmnd = cmd_request->cmd; | |
7f33f30a | 1132 | struct hv_host_device *host_dev = shost_priv(scmnd->device->host); |
8a411bad S |
1133 | void (*scsi_done_fn)(struct scsi_cmnd *); |
1134 | struct scsi_sense_hdr sense_hdr; | |
1135 | struct vmscsi_request *vm_srb; | |
b4017319 | 1136 | struct storvsc_scan_work *wrk; |
8a411bad | 1137 | |
3612ef99 | 1138 | vm_srb = &request->vstor_packet.vm_srb; |
8a411bad | 1139 | if (cmd_request->bounce_sgl_count) { |
3612ef99 S |
1140 | if (vm_srb->data_in == READ_TYPE) { |
1141 | copy_from_bounce_buffer(scsi_sglist(scmnd), | |
8a411bad S |
1142 | cmd_request->bounce_sgl, |
1143 | scsi_sg_count(scmnd)); | |
3612ef99 S |
1144 | destroy_bounce_buffer(cmd_request->bounce_sgl, |
1145 | cmd_request->bounce_sgl_count); | |
1146 | } | |
8a411bad S |
1147 | } |
1148 | ||
2544b794 S |
1149 | /* |
1150 | * If there is an error; offline the device since all | |
1151 | * error recovery strategies would have already been | |
1152 | * deployed on the host side. | |
1153 | */ | |
1154 | if (vm_srb->srb_status == 0x4) | |
1155 | scmnd->result = DID_TARGET_FAILURE << 16; | |
1156 | else | |
1157 | scmnd->result = vm_srb->scsi_status; | |
8a411bad | 1158 | |
b4017319 S |
1159 | /* |
1160 | * If the LUN is invalid; remove the device. | |
1161 | */ | |
1162 | if (vm_srb->srb_status == 0x20) { | |
1163 | struct storvsc_device *stor_dev; | |
1164 | struct hv_device *dev = host_dev->dev; | |
1165 | struct Scsi_Host *host; | |
1166 | ||
1167 | stor_dev = get_in_stor_device(dev); | |
1168 | host = stor_dev->host; | |
1169 | ||
1170 | wrk = kmalloc(sizeof(struct storvsc_scan_work), | |
1171 | GFP_ATOMIC); | |
1172 | if (!wrk) { | |
1173 | scmnd->result = DID_TARGET_FAILURE << 16; | |
1174 | } else { | |
1175 | wrk->host = host; | |
1176 | wrk->lun = vm_srb->lun; | |
1177 | INIT_WORK(&wrk->work, storvsc_remove_lun); | |
1178 | schedule_work(&wrk->work); | |
1179 | } | |
1180 | } | |
1181 | ||
8a411bad S |
1182 | if (scmnd->result) { |
1183 | if (scsi_normalize_sense(scmnd->sense_buffer, | |
1184 | SCSI_SENSE_BUFFERSIZE, &sense_hdr)) | |
1185 | scsi_print_sense_hdr("storvsc", &sense_hdr); | |
1186 | } | |
1187 | ||
8a411bad S |
1188 | scsi_set_resid(scmnd, |
1189 | request->data_buffer.len - | |
1190 | vm_srb->data_transfer_length); | |
1191 | ||
1192 | scsi_done_fn = scmnd->scsi_done; | |
1193 | ||
1194 | scmnd->host_scribble = NULL; | |
1195 | scmnd->scsi_done = NULL; | |
1196 | ||
8a411bad S |
1197 | scsi_done_fn(scmnd); |
1198 | ||
4e03e697 | 1199 | mempool_free(cmd_request, host_dev->request_mempool); |
8a411bad S |
1200 | } |
1201 | ||
92ae4ebd OH |
1202 | static bool storvsc_check_scsi_cmd(struct scsi_cmnd *scmnd) |
1203 | { | |
1204 | bool allowed = true; | |
1205 | u8 scsi_op = scmnd->cmnd[0]; | |
1206 | ||
1207 | switch (scsi_op) { | |
41098f8f S |
1208 | /* smartd sends this command, which will offline the device */ |
1209 | case SET_WINDOW: | |
59e00e74 | 1210 | scmnd->result = ILLEGAL_REQUEST << 16; |
41098f8f S |
1211 | allowed = false; |
1212 | break; | |
1213 | default: | |
1214 | break; | |
92ae4ebd OH |
1215 | } |
1216 | return allowed; | |
1217 | } | |
c5b463ae S |
1218 | |
1219 | /* | |
1220 | * storvsc_queuecommand - Initiate command processing | |
1221 | */ | |
bab445e1 | 1222 | static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) |
c5b463ae S |
1223 | { |
1224 | int ret; | |
bab445e1 | 1225 | struct hv_host_device *host_dev = shost_priv(host); |
c5b463ae | 1226 | struct hv_device *dev = host_dev->dev; |
c5b463ae S |
1227 | struct hv_storvsc_request *request; |
1228 | struct storvsc_cmd_request *cmd_request; | |
1229 | unsigned int request_size = 0; | |
1230 | int i; | |
1231 | struct scatterlist *sgl; | |
1232 | unsigned int sg_count = 0; | |
1233 | struct vmscsi_request *vm_srb; | |
1234 | ||
92ae4ebd | 1235 | if (storvsc_check_scsi_cmd(scmnd) == false) { |
bab445e1 | 1236 | scmnd->scsi_done(scmnd); |
92ae4ebd OH |
1237 | return 0; |
1238 | } | |
c5b463ae S |
1239 | |
1240 | /* If retrying, no need to prep the cmd */ | |
1241 | if (scmnd->host_scribble) { | |
c5b463ae S |
1242 | |
1243 | cmd_request = | |
1244 | (struct storvsc_cmd_request *)scmnd->host_scribble; | |
c5b463ae S |
1245 | |
1246 | goto retry_request; | |
1247 | } | |
1248 | ||
c5b463ae S |
1249 | request_size = sizeof(struct storvsc_cmd_request); |
1250 | ||
4e03e697 | 1251 | cmd_request = mempool_alloc(host_dev->request_mempool, |
c5b463ae | 1252 | GFP_ATOMIC); |
bab445e1 | 1253 | if (!cmd_request) |
c5b463ae | 1254 | return SCSI_MLQUEUE_DEVICE_BUSY; |
bab445e1 | 1255 | |
4e03e697 | 1256 | memset(cmd_request, 0, sizeof(struct storvsc_cmd_request)); |
c5b463ae S |
1257 | |
1258 | /* Setup the cmd request */ | |
1259 | cmd_request->bounce_sgl_count = 0; | |
1260 | cmd_request->bounce_sgl = NULL; | |
1261 | cmd_request->cmd = scmnd; | |
1262 | ||
1263 | scmnd->host_scribble = (unsigned char *)cmd_request; | |
1264 | ||
1265 | request = &cmd_request->request; | |
1266 | vm_srb = &request->vstor_packet.vm_srb; | |
1267 | ||
1268 | ||
1269 | /* Build the SRB */ | |
1270 | switch (scmnd->sc_data_direction) { | |
1271 | case DMA_TO_DEVICE: | |
1272 | vm_srb->data_in = WRITE_TYPE; | |
1273 | break; | |
1274 | case DMA_FROM_DEVICE: | |
1275 | vm_srb->data_in = READ_TYPE; | |
1276 | break; | |
1277 | default: | |
1278 | vm_srb->data_in = UNKNOWN_TYPE; | |
1279 | break; | |
1280 | } | |
1281 | ||
b8de73df | 1282 | request->on_io_completion = storvsc_command_completion; |
c5b463ae S |
1283 | request->context = cmd_request;/* scmnd; */ |
1284 | ||
c5b463ae S |
1285 | vm_srb->port_number = host_dev->port; |
1286 | vm_srb->path_id = scmnd->device->channel; | |
1287 | vm_srb->target_id = scmnd->device->id; | |
1288 | vm_srb->lun = scmnd->device->lun; | |
1289 | ||
c5b463ae S |
1290 | vm_srb->cdb_length = scmnd->cmd_len; |
1291 | ||
1292 | memcpy(vm_srb->cdb, scmnd->cmnd, vm_srb->cdb_length); | |
1293 | ||
1294 | request->sense_buffer = scmnd->sense_buffer; | |
1295 | ||
1296 | ||
1297 | request->data_buffer.len = scsi_bufflen(scmnd); | |
1298 | if (scsi_sg_count(scmnd)) { | |
1299 | sgl = (struct scatterlist *)scsi_sglist(scmnd); | |
1300 | sg_count = scsi_sg_count(scmnd); | |
1301 | ||
1302 | /* check if we need to bounce the sgl */ | |
1303 | if (do_bounce_buffer(sgl, scsi_sg_count(scmnd)) != -1) { | |
1304 | cmd_request->bounce_sgl = | |
1305 | create_bounce_buffer(sgl, scsi_sg_count(scmnd), | |
1306 | scsi_bufflen(scmnd)); | |
1307 | if (!cmd_request->bounce_sgl) { | |
c5b463ae | 1308 | scmnd->host_scribble = NULL; |
4e03e697 S |
1309 | mempool_free(cmd_request, |
1310 | host_dev->request_mempool); | |
c5b463ae S |
1311 | |
1312 | return SCSI_MLQUEUE_HOST_BUSY; | |
1313 | } | |
1314 | ||
1315 | cmd_request->bounce_sgl_count = | |
1316 | ALIGN(scsi_bufflen(scmnd), PAGE_SIZE) >> | |
1317 | PAGE_SHIFT; | |
1318 | ||
fa23b8c7 S |
1319 | if (vm_srb->data_in == WRITE_TYPE) |
1320 | copy_to_bounce_buffer(sgl, | |
1321 | cmd_request->bounce_sgl, | |
1322 | scsi_sg_count(scmnd)); | |
c5b463ae S |
1323 | |
1324 | sgl = cmd_request->bounce_sgl; | |
1325 | sg_count = cmd_request->bounce_sgl_count; | |
1326 | } | |
1327 | ||
1328 | request->data_buffer.offset = sgl[0].offset; | |
1329 | ||
1330 | for (i = 0; i < sg_count; i++) | |
1331 | request->data_buffer.pfn_array[i] = | |
1332 | page_to_pfn(sg_page((&sgl[i]))); | |
1333 | ||
1334 | } else if (scsi_sglist(scmnd)) { | |
c5b463ae S |
1335 | request->data_buffer.offset = |
1336 | virt_to_phys(scsi_sglist(scmnd)) & (PAGE_SIZE-1); | |
1337 | request->data_buffer.pfn_array[0] = | |
1338 | virt_to_phys(scsi_sglist(scmnd)) >> PAGE_SHIFT; | |
1339 | } | |
1340 | ||
1341 | retry_request: | |
1342 | /* Invokes the vsc to start an IO */ | |
636f0fd1 S |
1343 | ret = storvsc_do_io(dev, &cmd_request->request); |
1344 | ||
d2598f01 | 1345 | if (ret == -EAGAIN) { |
c5b463ae S |
1346 | /* no more space */ |
1347 | ||
70691ec6 | 1348 | if (cmd_request->bounce_sgl_count) |
c5b463ae | 1349 | destroy_bounce_buffer(cmd_request->bounce_sgl, |
70691ec6 | 1350 | cmd_request->bounce_sgl_count); |
c5b463ae | 1351 | |
4e03e697 | 1352 | mempool_free(cmd_request, host_dev->request_mempool); |
c5b463ae | 1353 | |
c5b463ae S |
1354 | scmnd->host_scribble = NULL; |
1355 | ||
1356 | ret = SCSI_MLQUEUE_DEVICE_BUSY; | |
1357 | } | |
1358 | ||
1359 | return ret; | |
1360 | } | |
1361 | ||
454f18a9 | 1362 | /* Scsi driver */ |
bef4a34a | 1363 | static struct scsi_host_template scsi_driver = { |
ff568d3a GKH |
1364 | .module = THIS_MODULE, |
1365 | .name = "storvsc_host_t", | |
1366 | .bios_param = storvsc_get_chs, | |
1367 | .queuecommand = storvsc_queuecommand, | |
1368 | .eh_host_reset_handler = storvsc_host_reset_handler, | |
1369 | .slave_alloc = storvsc_device_alloc, | |
1370 | .slave_configure = storvsc_device_configure, | |
1371 | .cmd_per_lun = 1, | |
1372 | /* 64 max_queue * 1 target */ | |
0686e4f4 | 1373 | .can_queue = STORVSC_MAX_IO_REQUESTS*STORVSC_MAX_TARGETS, |
ff568d3a | 1374 | .this_id = -1, |
454f18a9 | 1375 | /* no use setting to 0 since ll_blk_rw reset it to 1 */ |
ff568d3a GKH |
1376 | /* currently 32 */ |
1377 | .sg_tablesize = MAX_MULTIPAGE_BUFFER_COUNT, | |
1378 | /* | |
1379 | * ENABLE_CLUSTERING allows mutiple physically contig bio_vecs to merge | |
1380 | * into 1 sg element. If set, we must limit the max_segment_size to | |
1381 | * PAGE_SIZE, otherwise we may get 1 sg element that represents | |
1382 | * multiple | |
1383 | */ | |
454f18a9 | 1384 | /* physically contig pfns (ie sg[x].length > PAGE_SIZE). */ |
ff568d3a | 1385 | .use_clustering = ENABLE_CLUSTERING, |
454f18a9 | 1386 | /* Make sure we dont get a sg segment crosses a page boundary */ |
ff568d3a | 1387 | .dma_boundary = PAGE_SIZE-1, |
bef4a34a HJ |
1388 | }; |
1389 | ||
ef52a81b S |
1390 | enum { |
1391 | SCSI_GUID, | |
1392 | IDE_GUID, | |
1393 | }; | |
1394 | ||
d847b5fe | 1395 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 GKH |
1396 | /* SCSI guid */ |
1397 | { VMBUS_DEVICE(0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, | |
ef52a81b S |
1398 | 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f) |
1399 | .driver_data = SCSI_GUID }, | |
21e37742 S |
1400 | /* IDE guid */ |
1401 | { VMBUS_DEVICE(0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, | |
ef52a81b S |
1402 | 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5) |
1403 | .driver_data = IDE_GUID }, | |
c45cf2d4 | 1404 | { }, |
d847b5fe | 1405 | }; |
bef4a34a | 1406 | |
d847b5fe | 1407 | MODULE_DEVICE_TABLE(vmbus, id_table); |
bd1f5d6a | 1408 | |
bd1f5d6a | 1409 | |
3e189519 | 1410 | /* |
ff568d3a GKH |
1411 | * storvsc_probe - Add a new device for this driver |
1412 | */ | |
f5c78872 | 1413 | |
84946899 S |
1414 | static int storvsc_probe(struct hv_device *device, |
1415 | const struct hv_vmbus_device_id *dev_id) | |
bef4a34a | 1416 | { |
ff568d3a | 1417 | int ret; |
4e03e697 | 1418 | int number = STORVSC_MIN_BUF_NR; |
bef4a34a | 1419 | struct Scsi_Host *host; |
795b613d | 1420 | struct hv_host_device *host_dev; |
ef52a81b | 1421 | bool dev_is_ide = ((dev_id->driver_data == IDE_GUID) ? true : false); |
bd1f5d6a S |
1422 | int path = 0; |
1423 | int target = 0; | |
6e4198ce | 1424 | struct storvsc_device *stor_device; |
bd1f5d6a | 1425 | |
ff568d3a | 1426 | host = scsi_host_alloc(&scsi_driver, |
972621c9 | 1427 | sizeof(struct hv_host_device)); |
f8feed06 | 1428 | if (!host) |
bef4a34a | 1429 | return -ENOMEM; |
bef4a34a | 1430 | |
7f33f30a | 1431 | host_dev = shost_priv(host); |
795b613d | 1432 | memset(host_dev, 0, sizeof(struct hv_host_device)); |
bef4a34a | 1433 | |
795b613d | 1434 | host_dev->port = host->host_no; |
97c15296 | 1435 | host_dev->dev = device; |
bef4a34a | 1436 | |
795b613d | 1437 | host_dev->request_pool = |
9efd21e1 | 1438 | kmem_cache_create(dev_name(&device->device), |
1e05d88e | 1439 | sizeof(struct storvsc_cmd_request), 0, |
ff568d3a GKH |
1440 | SLAB_HWCACHE_ALIGN, NULL); |
1441 | ||
795b613d | 1442 | if (!host_dev->request_pool) { |
bef4a34a | 1443 | scsi_host_put(host); |
bef4a34a HJ |
1444 | return -ENOMEM; |
1445 | } | |
1446 | ||
4e03e697 S |
1447 | host_dev->request_mempool = mempool_create(number, mempool_alloc_slab, |
1448 | mempool_free_slab, | |
1449 | host_dev->request_pool); | |
1450 | ||
1451 | if (!host_dev->request_mempool) { | |
225ce6ea S |
1452 | ret = -ENOMEM; |
1453 | goto err_out0; | |
4e03e697 S |
1454 | } |
1455 | ||
a13d35ab | 1456 | stor_device = kzalloc(sizeof(struct storvsc_device), GFP_KERNEL); |
6e4198ce | 1457 | if (!stor_device) { |
225ce6ea S |
1458 | ret = -ENOMEM; |
1459 | goto err_out1; | |
6e4198ce | 1460 | } |
9efd21e1 | 1461 | |
a13d35ab S |
1462 | stor_device->destroy = false; |
1463 | init_waitqueue_head(&stor_device->waiting_to_drain); | |
1464 | stor_device->device = device; | |
cd654ea1 S |
1465 | stor_device->host = host; |
1466 | hv_set_drvdata(device, stor_device); | |
a13d35ab | 1467 | |
6e4198ce S |
1468 | stor_device->port_number = host->host_no; |
1469 | ret = storvsc_connect_to_vsp(device, storvsc_ringbuffer_size); | |
225ce6ea S |
1470 | if (ret) |
1471 | goto err_out2; | |
bef4a34a | 1472 | |
bd1f5d6a S |
1473 | if (dev_is_ide) |
1474 | storvsc_get_ide_info(device, &target, &path); | |
1475 | ||
6e4198ce S |
1476 | host_dev->path = stor_device->path_id; |
1477 | host_dev->target = stor_device->target_id; | |
bef4a34a | 1478 | |
ff568d3a GKH |
1479 | /* max # of devices per target */ |
1480 | host->max_lun = STORVSC_MAX_LUNS_PER_TARGET; | |
1481 | /* max # of targets per channel */ | |
1482 | host->max_id = STORVSC_MAX_TARGETS; | |
1483 | /* max # of channels */ | |
1484 | host->max_channel = STORVSC_MAX_CHANNELS - 1; | |
cf55f4a8 MS |
1485 | /* max cmd length */ |
1486 | host->max_cmd_len = STORVSC_MAX_CMD_LEN; | |
bef4a34a | 1487 | |
454f18a9 | 1488 | /* Register the HBA and start the scsi bus scan */ |
9efd21e1 | 1489 | ret = scsi_add_host(host, &device->device); |
bd1f5d6a | 1490 | if (ret != 0) |
225ce6ea | 1491 | goto err_out3; |
bef4a34a | 1492 | |
bd1f5d6a S |
1493 | if (!dev_is_ide) { |
1494 | scsi_scan_host(host); | |
1495 | return 0; | |
1496 | } | |
1497 | ret = scsi_add_device(host, 0, target, 0); | |
1498 | if (ret) { | |
1499 | scsi_remove_host(host); | |
225ce6ea | 1500 | goto err_out3; |
bef4a34a | 1501 | } |
bd1f5d6a | 1502 | return 0; |
bef4a34a | 1503 | |
225ce6ea S |
1504 | err_out3: |
1505 | /* | |
1506 | * Once we have connected with the host, we would need to | |
1507 | * to invoke storvsc_dev_remove() to rollback this state and | |
1508 | * this call also frees up the stor_device; hence the jump around | |
1509 | * err_out2 label. | |
1510 | */ | |
bd1f5d6a | 1511 | storvsc_dev_remove(device); |
225ce6ea S |
1512 | goto err_out1; |
1513 | ||
1514 | err_out2: | |
1515 | kfree(stor_device); | |
1516 | ||
1517 | err_out1: | |
4e03e697 | 1518 | mempool_destroy(host_dev->request_mempool); |
225ce6ea S |
1519 | |
1520 | err_out0: | |
bd1f5d6a S |
1521 | kmem_cache_destroy(host_dev->request_pool); |
1522 | scsi_host_put(host); | |
225ce6ea | 1523 | return ret; |
bef4a34a HJ |
1524 | } |
1525 | ||
7bd05b91 S |
1526 | /* The one and only one */ |
1527 | ||
40bf63ed | 1528 | static struct hv_driver storvsc_drv = { |
fafb0efc | 1529 | .name = KBUILD_MODNAME, |
d847b5fe | 1530 | .id_table = id_table, |
40bf63ed S |
1531 | .probe = storvsc_probe, |
1532 | .remove = storvsc_remove, | |
39ae6fae | 1533 | }; |
7bd05b91 | 1534 | |
d9bbae83 | 1535 | static int __init storvsc_drv_init(void) |
f5c78872 | 1536 | { |
01415ab3 S |
1537 | u32 max_outstanding_req_per_channel; |
1538 | ||
1539 | /* | |
1540 | * Divide the ring buffer data size (which is 1 page less | |
1541 | * than the ring buffer size since that page is reserved for | |
1542 | * the ring buffer indices) by the max request size (which is | |
1543 | * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64) | |
1544 | */ | |
01415ab3 | 1545 | max_outstanding_req_per_channel = |
768fa219 GKH |
1546 | ((storvsc_ringbuffer_size - PAGE_SIZE) / |
1547 | ALIGN(MAX_MULTIPAGE_BUFFER_PACKET + | |
1548 | sizeof(struct vstor_packet) + sizeof(u64), | |
1549 | sizeof(u64))); | |
f5c78872 | 1550 | |
01415ab3 | 1551 | if (max_outstanding_req_per_channel < |
f5c78872 | 1552 | STORVSC_MAX_IO_REQUESTS) |
b06efc19 | 1553 | return -EINVAL; |
f5c78872 | 1554 | |
768fa219 | 1555 | return vmbus_driver_register(&storvsc_drv); |
f5c78872 S |
1556 | } |
1557 | ||
c63ba9e1 | 1558 | static void __exit storvsc_drv_exit(void) |
f5c78872 | 1559 | { |
768fa219 | 1560 | vmbus_driver_unregister(&storvsc_drv); |
f5c78872 S |
1561 | } |
1562 | ||
ff568d3a | 1563 | MODULE_LICENSE("GPL"); |
26c14cc1 | 1564 | MODULE_VERSION(HV_DRV_VERSION); |
3afc7cc3 | 1565 | MODULE_DESCRIPTION("Microsoft Hyper-V virtual storage driver"); |
d9bbae83 | 1566 | module_init(storvsc_drv_init); |
c63ba9e1 | 1567 | module_exit(storvsc_drv_exit); |