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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * sr.c Copyright (C) 1992 David Giller | |
4 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
5 | * | |
6 | * adapted from: | |
7 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
8 | * Linux scsi disk driver by | |
9 | * Drew Eckhardt <drew@colorado.edu> | |
10 | * | |
11 | * Modified by Eric Youngdale ericy@andante.org to | |
12 | * add scatter-gather, multiple outstanding request, and other | |
13 | * enhancements. | |
14 | * | |
15 | * Modified by Eric Youngdale eric@andante.org to support loadable | |
16 | * low-level scsi drivers. | |
17 | * | |
18 | * Modified by Thomas Quinot thomas@melchior.cuivre.fdn.fr to | |
19 | * provide auto-eject. | |
20 | * | |
21 | * Modified by Gerd Knorr <kraxel@cs.tu-berlin.de> to support the | |
22 | * generic cdrom interface | |
23 | * | |
24 | * Modified by Jens Axboe <axboe@suse.de> - Uniform sr_packet() | |
25 | * interface, capabilities probe additions, ioctl cleanups, etc. | |
26 | * | |
27 | * Modified by Richard Gooch <rgooch@atnf.csiro.au> to support devfs | |
28 | * | |
29 | * Modified by Jens Axboe <axboe@suse.de> - support DVD-RAM | |
30 | * transparently and lose the GHOST hack | |
31 | * | |
32 | * Modified by Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
33 | * check resource allocation in sr_init and some cleanups | |
34 | */ | |
35 | ||
36 | #include <linux/module.h> | |
37 | #include <linux/fs.h> | |
38 | #include <linux/kernel.h> | |
1da177e4 LT |
39 | #include <linux/mm.h> |
40 | #include <linux/bio.h> | |
d320a955 | 41 | #include <linux/compat.h> |
1da177e4 LT |
42 | #include <linux/string.h> |
43 | #include <linux/errno.h> | |
44 | #include <linux/cdrom.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/init.h> | |
b81e0c23 | 47 | #include <linux/major.h> |
1da177e4 | 48 | #include <linux/blkdev.h> |
bca6b067 | 49 | #include <linux/blk-pm.h> |
0b950672 | 50 | #include <linux/mutex.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
6c7f1e2f | 52 | #include <linux/pm_runtime.h> |
7c0f6ba6 | 53 | #include <linux/uaccess.h> |
1da177e4 | 54 | |
655da8e5 BVA |
55 | #include <asm/unaligned.h> |
56 | ||
1da177e4 LT |
57 | #include <scsi/scsi.h> |
58 | #include <scsi/scsi_dbg.h> | |
59 | #include <scsi/scsi_device.h> | |
60 | #include <scsi/scsi_driver.h> | |
820732b5 | 61 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
62 | #include <scsi/scsi_eh.h> |
63 | #include <scsi/scsi_host.h> | |
64 | #include <scsi/scsi_ioctl.h> /* For the door lock/unlock commands */ | |
1da177e4 LT |
65 | |
66 | #include "scsi_logging.h" | |
67 | #include "sr.h" | |
68 | ||
69 | ||
f018fa55 RH |
70 | MODULE_DESCRIPTION("SCSI cdrom (sr) driver"); |
71 | MODULE_LICENSE("GPL"); | |
72 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_CDROM_MAJOR); | |
d7b8bcb0 MT |
73 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ROM); |
74 | MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM); | |
f018fa55 | 75 | |
1da177e4 LT |
76 | #define SR_DISKS 256 |
77 | ||
1da177e4 LT |
78 | #define SR_CAPABILITIES \ |
79 | (CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|CDC_SELECT_SPEED| \ | |
80 | CDC_SELECT_DISC|CDC_MULTI_SESSION|CDC_MCN|CDC_MEDIA_CHANGED| \ | |
6a2900b6 | 81 | CDC_PLAY_AUDIO|CDC_RESET|CDC_DRIVE_STATUS| \ |
1da177e4 LT |
82 | CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_DVD_RAM|CDC_GENERIC_PACKET| \ |
83 | CDC_MRW|CDC_MRW_W|CDC_RAM) | |
84 | ||
85 | static int sr_probe(struct device *); | |
86 | static int sr_remove(struct device *); | |
159b2cbf | 87 | static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt); |
7b3d9545 | 88 | static int sr_done(struct scsi_cmnd *); |
6c7f1e2f AL |
89 | static int sr_runtime_suspend(struct device *dev); |
90 | ||
a816b4c6 | 91 | static const struct dev_pm_ops sr_pm_ops = { |
6c7f1e2f AL |
92 | .runtime_suspend = sr_runtime_suspend, |
93 | }; | |
1da177e4 LT |
94 | |
95 | static struct scsi_driver sr_template = { | |
1da177e4 LT |
96 | .gendrv = { |
97 | .name = "sr", | |
3af6b352 | 98 | .owner = THIS_MODULE, |
1da177e4 LT |
99 | .probe = sr_probe, |
100 | .remove = sr_remove, | |
6c7f1e2f | 101 | .pm = &sr_pm_ops, |
1da177e4 | 102 | }, |
a1b73fc1 | 103 | .init_command = sr_init_command, |
7b3d9545 | 104 | .done = sr_done, |
1da177e4 LT |
105 | }; |
106 | ||
107 | static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG]; | |
108 | static DEFINE_SPINLOCK(sr_index_lock); | |
109 | ||
9c2b9dba CH |
110 | static struct lock_class_key sr_bio_compl_lkclass; |
111 | ||
1da177e4 LT |
112 | static int sr_open(struct cdrom_device_info *, int); |
113 | static void sr_release(struct cdrom_device_info *); | |
114 | ||
115 | static void get_sectorsize(struct scsi_cd *); | |
ebc95c79 | 116 | static int get_capabilities(struct scsi_cd *); |
1da177e4 | 117 | |
93aae17a TH |
118 | static unsigned int sr_check_events(struct cdrom_device_info *cdi, |
119 | unsigned int clearing, int slot); | |
1da177e4 | 120 | static int sr_packet(struct cdrom_device_info *, struct packet_command *); |
ba51bdaf CH |
121 | static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf, |
122 | u32 lba, u32 nr, u8 *last_sense); | |
1da177e4 | 123 | |
853fe1bf | 124 | static const struct cdrom_device_ops sr_dops = { |
1da177e4 LT |
125 | .open = sr_open, |
126 | .release = sr_release, | |
127 | .drive_status = sr_drive_status, | |
93aae17a | 128 | .check_events = sr_check_events, |
1da177e4 LT |
129 | .tray_move = sr_tray_move, |
130 | .lock_door = sr_lock_door, | |
131 | .select_speed = sr_select_speed, | |
132 | .get_last_session = sr_get_last_session, | |
133 | .get_mcn = sr_get_mcn, | |
134 | .reset = sr_reset, | |
135 | .audio_ioctl = sr_audio_ioctl, | |
1da177e4 | 136 | .generic_packet = sr_packet, |
ba51bdaf CH |
137 | .read_cdda_bpc = sr_read_cdda_bpc, |
138 | .capability = SR_CAPABILITIES, | |
1da177e4 LT |
139 | }; |
140 | ||
1da177e4 LT |
141 | static inline struct scsi_cd *scsi_cd(struct gendisk *disk) |
142 | { | |
e7f76552 | 143 | return disk->private_data; |
1da177e4 LT |
144 | } |
145 | ||
6c7f1e2f AL |
146 | static int sr_runtime_suspend(struct device *dev) |
147 | { | |
148 | struct scsi_cd *cd = dev_get_drvdata(dev); | |
149 | ||
13b43891 AS |
150 | if (!cd) /* E.g.: runtime suspend following sr_remove() */ |
151 | return 0; | |
152 | ||
6c7f1e2f AL |
153 | if (cd->media_present) |
154 | return -EBUSY; | |
155 | else | |
156 | return 0; | |
157 | } | |
158 | ||
93aae17a TH |
159 | static unsigned int sr_get_events(struct scsi_device *sdev) |
160 | { | |
161 | u8 buf[8]; | |
162 | u8 cmd[] = { GET_EVENT_STATUS_NOTIFICATION, | |
163 | 1, /* polled */ | |
164 | 0, 0, /* reserved */ | |
165 | 1 << 4, /* notification class: media */ | |
166 | 0, 0, /* reserved */ | |
167 | 0, sizeof(buf), /* allocation length */ | |
168 | 0, /* control */ | |
169 | }; | |
170 | struct event_header *eh = (void *)buf; | |
171 | struct media_event_desc *med = (void *)(buf + 4); | |
172 | struct scsi_sense_hdr sshdr; | |
49d33b62 MC |
173 | const struct scsi_exec_args exec_args = { |
174 | .sshdr = &sshdr, | |
175 | }; | |
93aae17a TH |
176 | int result; |
177 | ||
49d33b62 MC |
178 | result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, buf, sizeof(buf), |
179 | SR_TIMEOUT, MAX_RETRIES, &exec_args); | |
93aae17a TH |
180 | if (scsi_sense_valid(&sshdr) && sshdr.sense_key == UNIT_ATTENTION) |
181 | return DISK_EVENT_MEDIA_CHANGE; | |
182 | ||
183 | if (result || be16_to_cpu(eh->data_len) < sizeof(*med)) | |
184 | return 0; | |
185 | ||
186 | if (eh->nea || eh->notification_class != 0x4) | |
187 | return 0; | |
188 | ||
189 | if (med->media_event_code == 1) | |
190 | return DISK_EVENT_EJECT_REQUEST; | |
191 | else if (med->media_event_code == 2) | |
192 | return DISK_EVENT_MEDIA_CHANGE; | |
7dd753ca | 193 | else if (med->media_event_code == 3) |
5c04243a | 194 | return DISK_EVENT_MEDIA_CHANGE; |
93aae17a TH |
195 | return 0; |
196 | } | |
197 | ||
1da177e4 | 198 | /* |
93aae17a TH |
199 | * This function checks to see if the media has been changed or eject |
200 | * button has been pressed. It is possible that we have already | |
201 | * sensed a change, or the drive may have sensed one and not yet | |
202 | * reported it. The past events are accumulated in sdev->changed and | |
203 | * returned together with the current state. | |
1da177e4 | 204 | */ |
93aae17a TH |
205 | static unsigned int sr_check_events(struct cdrom_device_info *cdi, |
206 | unsigned int clearing, int slot) | |
1da177e4 LT |
207 | { |
208 | struct scsi_cd *cd = cdi->handle; | |
93aae17a TH |
209 | bool last_present; |
210 | struct scsi_sense_hdr sshdr; | |
211 | unsigned int events; | |
212 | int ret; | |
1da177e4 | 213 | |
93aae17a TH |
214 | /* no changer support */ |
215 | if (CDSL_CURRENT != slot) | |
216 | return 0; | |
217 | ||
218 | events = sr_get_events(cd->device); | |
79b9677d KS |
219 | cd->get_event_changed |= events & DISK_EVENT_MEDIA_CHANGE; |
220 | ||
221 | /* | |
222 | * If earlier GET_EVENT_STATUS_NOTIFICATION and TUR did not agree | |
223 | * for several times in a row. We rely on TUR only for this likely | |
224 | * broken device, to prevent generating incorrect media changed | |
225 | * events for every open(). | |
226 | */ | |
227 | if (cd->ignore_get_event) { | |
228 | events &= ~DISK_EVENT_MEDIA_CHANGE; | |
229 | goto do_tur; | |
230 | } | |
231 | ||
93aae17a TH |
232 | /* |
233 | * GET_EVENT_STATUS_NOTIFICATION is enough unless MEDIA_CHANGE | |
234 | * is being cleared. Note that there are devices which hang | |
235 | * if asked to execute TUR repeatedly. | |
236 | */ | |
79b9677d KS |
237 | if (cd->device->changed) { |
238 | events |= DISK_EVENT_MEDIA_CHANGE; | |
239 | cd->device->changed = 0; | |
240 | cd->tur_changed = true; | |
241 | } | |
93aae17a | 242 | |
79b9677d KS |
243 | if (!(clearing & DISK_EVENT_MEDIA_CHANGE)) |
244 | return events; | |
245 | do_tur: | |
93aae17a TH |
246 | /* let's see whether the media is there with TUR */ |
247 | last_present = cd->media_present; | |
248 | ret = scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr); | |
1da177e4 | 249 | |
638428ec TH |
250 | /* |
251 | * Media is considered to be present if TUR succeeds or fails with | |
252 | * sense data indicating something other than media-not-present | |
253 | * (ASC 0x3a). | |
254 | */ | |
93aae17a TH |
255 | cd->media_present = scsi_status_is_good(ret) || |
256 | (scsi_sense_valid(&sshdr) && sshdr.asc != 0x3a); | |
1da177e4 | 257 | |
93aae17a | 258 | if (last_present != cd->media_present) |
79b9677d KS |
259 | cd->device->changed = 1; |
260 | ||
93aae17a TH |
261 | if (cd->device->changed) { |
262 | events |= DISK_EVENT_MEDIA_CHANGE; | |
263 | cd->device->changed = 0; | |
79b9677d KS |
264 | cd->tur_changed = true; |
265 | } | |
266 | ||
267 | if (cd->ignore_get_event) | |
268 | return events; | |
269 | ||
270 | /* check whether GET_EVENT is reporting spurious MEDIA_CHANGE */ | |
271 | if (!cd->tur_changed) { | |
272 | if (cd->get_event_changed) { | |
273 | if (cd->tur_mismatch++ > 8) { | |
96eefad2 HR |
274 | sr_printk(KERN_WARNING, cd, |
275 | "GET_EVENT and TUR disagree continuously, suppress GET_EVENT events\n"); | |
79b9677d KS |
276 | cd->ignore_get_event = true; |
277 | } | |
278 | } else { | |
279 | cd->tur_mismatch = 0; | |
280 | } | |
1da177e4 | 281 | } |
79b9677d KS |
282 | cd->tur_changed = false; |
283 | cd->get_event_changed = false; | |
285e9670 | 284 | |
93aae17a | 285 | return events; |
1da177e4 | 286 | } |
93aae17a | 287 | |
1da177e4 | 288 | /* |
7b3d9545 | 289 | * sr_done is the interrupt routine for the device driver. |
1da177e4 | 290 | * |
7b3d9545 | 291 | * It will be notified on the end of a SCSI read / write, and will take one |
1da177e4 LT |
292 | * of several actions based on success or failure. |
293 | */ | |
7b3d9545 | 294 | static int sr_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
295 | { |
296 | int result = SCpnt->result; | |
30b0c37b | 297 | int this_count = scsi_bufflen(SCpnt); |
1da177e4 LT |
298 | int good_bytes = (result == 0 ? this_count : 0); |
299 | int block_sectors = 0; | |
300 | long error_sector; | |
c4deb5b5 | 301 | struct request *rq = scsi_cmd_to_rq(SCpnt); |
f3fa33ac | 302 | struct scsi_cd *cd = scsi_cd(rq->q->disk); |
1da177e4 LT |
303 | |
304 | #ifdef DEBUG | |
96eefad2 | 305 | scmd_printk(KERN_INFO, SCpnt, "done: %x\n", result); |
1da177e4 LT |
306 | #endif |
307 | ||
308 | /* | |
309 | * Handle MEDIUM ERRORs or VOLUME OVERFLOWs that indicate partial | |
310 | * success. Since this is a relatively rare error condition, no | |
311 | * care is taken to avoid unnecessary additional work such as | |
312 | * memcpy's that could be avoided. | |
313 | */ | |
3d45cefc | 314 | if (scsi_status_is_check_condition(result) && |
1da177e4 LT |
315 | (SCpnt->sense_buffer[0] & 0x7f) == 0x70) { /* Sense current */ |
316 | switch (SCpnt->sense_buffer[2]) { | |
317 | case MEDIUM_ERROR: | |
318 | case VOLUME_OVERFLOW: | |
319 | case ILLEGAL_REQUEST: | |
320 | if (!(SCpnt->sense_buffer[0] & 0x90)) | |
321 | break; | |
655da8e5 BVA |
322 | error_sector = |
323 | get_unaligned_be32(&SCpnt->sense_buffer[3]); | |
c4deb5b5 BVA |
324 | if (rq->bio != NULL) |
325 | block_sectors = bio_sectors(rq->bio); | |
1da177e4 LT |
326 | if (block_sectors < 4) |
327 | block_sectors = 4; | |
328 | if (cd->device->sector_size == 2048) | |
329 | error_sector <<= 2; | |
330 | error_sector &= ~(block_sectors - 1); | |
c4deb5b5 | 331 | good_bytes = (error_sector - blk_rq_pos(rq)) << 9; |
1da177e4 LT |
332 | if (good_bytes < 0 || good_bytes >= this_count) |
333 | good_bytes = 0; | |
334 | /* | |
335 | * The SCSI specification allows for the value | |
336 | * returned by READ CAPACITY to be up to 75 2K | |
337 | * sectors past the last readable block. | |
338 | * Therefore, if we hit a medium error within the | |
339 | * last 75 2K sectors, we decrease the saved size | |
340 | * value. | |
341 | */ | |
342 | if (error_sector < get_capacity(cd->disk) && | |
343 | cd->capacity - error_sector < 4 * 75) | |
344 | set_capacity(cd->disk, error_sector); | |
345 | break; | |
346 | ||
347 | case RECOVERED_ERROR: | |
1da177e4 LT |
348 | good_bytes = this_count; |
349 | break; | |
350 | ||
351 | default: | |
352 | break; | |
353 | } | |
354 | } | |
355 | ||
7b3d9545 | 356 | return good_bytes; |
1da177e4 LT |
357 | } |
358 | ||
159b2cbf | 359 | static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt) |
1da177e4 | 360 | { |
242f9dcb | 361 | int block = 0, this_count, s_size; |
7f9a6bc4 | 362 | struct scsi_cd *cd; |
c4deb5b5 | 363 | struct request *rq = scsi_cmd_to_rq(SCpnt); |
159b2cbf | 364 | blk_status_t ret; |
7f9a6bc4 | 365 | |
7007e9dd | 366 | ret = scsi_alloc_sgtables(SCpnt); |
159b2cbf | 367 | if (ret != BLK_STS_OK) |
7007e9dd | 368 | return ret; |
f3fa33ac | 369 | cd = scsi_cd(rq->q->disk); |
7f9a6bc4 | 370 | |
96eefad2 HR |
371 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
372 | "Doing sr request, block = %d\n", block)); | |
1da177e4 LT |
373 | |
374 | if (!cd->device || !scsi_device_online(cd->device)) { | |
96eefad2 HR |
375 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
376 | "Finishing %u sectors\n", blk_rq_sectors(rq))); | |
377 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
378 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 379 | goto out; |
1da177e4 LT |
380 | } |
381 | ||
382 | if (cd->device->changed) { | |
383 | /* | |
384 | * quietly refuse to do anything to a changed disc until the | |
385 | * changed bit has been reset | |
386 | */ | |
7f9a6bc4 | 387 | goto out; |
1da177e4 LT |
388 | } |
389 | ||
1da177e4 | 390 | s_size = cd->device->sector_size; |
1da177e4 | 391 | if (s_size != 512 && s_size != 1024 && s_size != 2048) { |
3bf743e7 | 392 | scmd_printk(KERN_ERR, SCpnt, "bad sector size %d\n", s_size); |
7f9a6bc4 | 393 | goto out; |
1da177e4 LT |
394 | } |
395 | ||
aebf526b CH |
396 | switch (req_op(rq)) { |
397 | case REQ_OP_WRITE: | |
fd2eb903 | 398 | if (!cd->writeable) |
7f9a6bc4 | 399 | goto out; |
1da177e4 | 400 | SCpnt->cmnd[0] = WRITE_10; |
96eefad2 | 401 | cd->cdi.media_written = 1; |
aebf526b CH |
402 | break; |
403 | case REQ_OP_READ: | |
1da177e4 | 404 | SCpnt->cmnd[0] = READ_10; |
aebf526b CH |
405 | break; |
406 | default: | |
7f9a6bc4 JB |
407 | blk_dump_rq_flags(rq, "Unknown sr command"); |
408 | goto out; | |
1da177e4 LT |
409 | } |
410 | ||
411 | { | |
30b0c37b BH |
412 | struct scatterlist *sg; |
413 | int i, size = 0, sg_count = scsi_sg_count(SCpnt); | |
1da177e4 | 414 | |
30b0c37b BH |
415 | scsi_for_each_sg(SCpnt, sg, sg_count, i) |
416 | size += sg->length; | |
417 | ||
418 | if (size != scsi_bufflen(SCpnt)) { | |
3bf743e7 JG |
419 | scmd_printk(KERN_ERR, SCpnt, |
420 | "mismatch count %d, bytes %d\n", | |
30b0c37b BH |
421 | size, scsi_bufflen(SCpnt)); |
422 | if (scsi_bufflen(SCpnt) > size) | |
423 | SCpnt->sdb.length = size; | |
1da177e4 LT |
424 | } |
425 | } | |
426 | ||
427 | /* | |
428 | * request doesn't start on hw block boundary, add scatter pads | |
429 | */ | |
83096ebf | 430 | if (((unsigned int)blk_rq_pos(rq) % (s_size >> 9)) || |
30b0c37b | 431 | (scsi_bufflen(SCpnt) % s_size)) { |
3bf743e7 | 432 | scmd_printk(KERN_NOTICE, SCpnt, "unaligned transfer\n"); |
7f9a6bc4 | 433 | goto out; |
1da177e4 LT |
434 | } |
435 | ||
30b0c37b | 436 | this_count = (scsi_bufflen(SCpnt) >> 9) / (s_size >> 9); |
1da177e4 LT |
437 | |
438 | ||
96eefad2 HR |
439 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
440 | "%s %d/%u 512 byte blocks.\n", | |
441 | (rq_data_dir(rq) == WRITE) ? | |
1da177e4 | 442 | "writing" : "reading", |
96eefad2 | 443 | this_count, blk_rq_sectors(rq))); |
1da177e4 LT |
444 | |
445 | SCpnt->cmnd[1] = 0; | |
83096ebf | 446 | block = (unsigned int)blk_rq_pos(rq) / (s_size >> 9); |
1da177e4 LT |
447 | |
448 | if (this_count > 0xffff) { | |
449 | this_count = 0xffff; | |
30b0c37b | 450 | SCpnt->sdb.length = this_count * s_size; |
1da177e4 LT |
451 | } |
452 | ||
655da8e5 | 453 | put_unaligned_be32(block, &SCpnt->cmnd[2]); |
1da177e4 | 454 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; |
655da8e5 | 455 | put_unaligned_be16(this_count, &SCpnt->cmnd[7]); |
1da177e4 LT |
456 | |
457 | /* | |
458 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
459 | * host adapter, it's safe to assume that we can at least transfer | |
460 | * this many bytes between each connect / disconnect. | |
461 | */ | |
462 | SCpnt->transfersize = cd->device->sector_size; | |
463 | SCpnt->underflow = this_count << 9; | |
1da177e4 | 464 | SCpnt->allowed = MAX_RETRIES; |
9120ac54 | 465 | SCpnt->cmd_len = 10; |
1da177e4 | 466 | |
1da177e4 | 467 | /* |
7007e9dd | 468 | * This indicates that the command is ready from our end to be queued. |
1da177e4 | 469 | */ |
7007e9dd | 470 | return BLK_STS_OK; |
7f9a6bc4 | 471 | out: |
7007e9dd CH |
472 | scsi_free_sgtables(SCpnt); |
473 | return BLK_STS_IOERR; | |
1da177e4 LT |
474 | } |
475 | ||
38a2b557 CH |
476 | static void sr_revalidate_disk(struct scsi_cd *cd) |
477 | { | |
478 | struct scsi_sense_hdr sshdr; | |
479 | ||
480 | /* if the unit is not ready, nothing more to do */ | |
481 | if (scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) | |
482 | return; | |
483 | sr_cd_check(&cd->cdi); | |
484 | get_sectorsize(cd); | |
485 | } | |
486 | ||
05bdb996 | 487 | static int sr_block_open(struct gendisk *disk, blk_mode_t mode) |
1da177e4 | 488 | { |
d32e2bf8 | 489 | struct scsi_cd *cd = scsi_cd(disk); |
01d0c698 | 490 | struct scsi_device *sdev = cd->device; |
79d45f57 | 491 | int ret; |
1da177e4 | 492 | |
01d0c698 CH |
493 | if (scsi_device_get(cd->device)) |
494 | return -ENXIO; | |
1214fd7b | 495 | |
1214fd7b | 496 | scsi_autopm_get_device(sdev); |
d32e2bf8 | 497 | if (disk_check_media_change(disk)) |
38a2b557 | 498 | sr_revalidate_disk(cd); |
2bbea6e1 | 499 | |
51a85881 | 500 | mutex_lock(&cd->lock); |
764b8310 | 501 | ret = cdrom_open(&cd->cdi, mode); |
51a85881 | 502 | mutex_unlock(&cd->lock); |
1214fd7b BVA |
503 | |
504 | scsi_autopm_put_device(sdev); | |
505 | if (ret) | |
01d0c698 | 506 | scsi_device_put(cd->device); |
1da177e4 LT |
507 | return ret; |
508 | } | |
509 | ||
ae220766 | 510 | static void sr_block_release(struct gendisk *disk) |
1da177e4 | 511 | { |
40cc51be | 512 | struct scsi_cd *cd = scsi_cd(disk); |
72655c0e | 513 | |
51a85881 | 514 | mutex_lock(&cd->lock); |
7ae24fce | 515 | cdrom_release(&cd->cdi); |
51a85881 | 516 | mutex_unlock(&cd->lock); |
72655c0e | 517 | |
01d0c698 | 518 | scsi_device_put(cd->device); |
1da177e4 LT |
519 | } |
520 | ||
05bdb996 CH |
521 | static int sr_block_ioctl(struct block_device *bdev, blk_mode_t mode, |
522 | unsigned cmd, unsigned long arg) | |
1da177e4 | 523 | { |
a30e3441 | 524 | struct scsi_cd *cd = scsi_cd(bdev->bd_disk); |
1da177e4 | 525 | struct scsi_device *sdev = cd->device; |
6a2900b6 CH |
526 | void __user *argp = (void __user *)arg; |
527 | int ret; | |
1da177e4 | 528 | |
4f07bfc5 CH |
529 | if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO)) |
530 | return -ENOIOCTLCMD; | |
d320a955 | 531 | |
51a85881 | 532 | mutex_lock(&cd->lock); |
d320a955 AB |
533 | |
534 | ret = scsi_ioctl_block_when_processing_errors(sdev, cmd, | |
05bdb996 | 535 | (mode & BLK_OPEN_NDELAY)); |
d320a955 AB |
536 | if (ret) |
537 | goto out; | |
538 | ||
539 | scsi_autopm_get_device(sdev); | |
540 | ||
bc5519c1 | 541 | if (cmd != CDROMCLOSETRAY && cmd != CDROMEJECT) { |
473399b5 | 542 | ret = cdrom_ioctl(&cd->cdi, bdev, cmd, arg); |
558e3fbe CH |
543 | if (ret != -ENOSYS) |
544 | goto put; | |
d320a955 | 545 | } |
05bdb996 | 546 | ret = scsi_ioctl(sdev, mode & BLK_OPEN_WRITE, cmd, argp); |
d320a955 AB |
547 | |
548 | put: | |
549 | scsi_autopm_put_device(sdev); | |
d320a955 | 550 | out: |
51a85881 | 551 | mutex_unlock(&cd->lock); |
d320a955 | 552 | return ret; |
d320a955 | 553 | } |
d320a955 | 554 | |
93aae17a TH |
555 | static unsigned int sr_block_check_events(struct gendisk *disk, |
556 | unsigned int clearing) | |
1da177e4 | 557 | { |
01d0c698 | 558 | struct scsi_cd *cd = disk->private_data; |
6c7f1e2f | 559 | |
01d0c698 | 560 | if (atomic_read(&cd->device->disk_events_disable_depth)) |
6627b38f | 561 | return 0; |
01d0c698 CH |
562 | return cdrom_check_events(&cd->cdi, clearing); |
563 | } | |
6c7f1e2f | 564 | |
01d0c698 CH |
565 | static void sr_free_disk(struct gendisk *disk) |
566 | { | |
567 | struct scsi_cd *cd = disk->private_data; | |
2d097c50 | 568 | |
01d0c698 CH |
569 | spin_lock(&sr_index_lock); |
570 | clear_bit(MINOR(disk_devt(disk)), sr_index_bits); | |
571 | spin_unlock(&sr_index_lock); | |
572 | ||
573 | unregister_cdrom(&cd->cdi); | |
574 | mutex_destroy(&cd->lock); | |
575 | kfree(cd); | |
93aae17a TH |
576 | } |
577 | ||
83d5cde4 | 578 | static const struct block_device_operations sr_bdops = |
1da177e4 LT |
579 | { |
580 | .owner = THIS_MODULE, | |
40cc51be AV |
581 | .open = sr_block_open, |
582 | .release = sr_block_release, | |
8a6cfeb6 | 583 | .ioctl = sr_block_ioctl, |
558e3fbe | 584 | .compat_ioctl = blkdev_compat_ptr_ioctl, |
93aae17a | 585 | .check_events = sr_block_check_events, |
01d0c698 | 586 | .free_disk = sr_free_disk, |
1da177e4 LT |
587 | }; |
588 | ||
589 | static int sr_open(struct cdrom_device_info *cdi, int purpose) | |
590 | { | |
591 | struct scsi_cd *cd = cdi->handle; | |
592 | struct scsi_device *sdev = cd->device; | |
1da177e4 LT |
593 | |
594 | /* | |
595 | * If the device is in error recovery, wait until it is done. | |
596 | * If the device is offline, then disallow any access to it. | |
597 | */ | |
1da177e4 | 598 | if (!scsi_block_when_processing_errors(sdev)) |
ca62009e | 599 | return -ENXIO; |
1da177e4 | 600 | |
1da177e4 | 601 | return 0; |
1da177e4 LT |
602 | } |
603 | ||
604 | static void sr_release(struct cdrom_device_info *cdi) | |
605 | { | |
1da177e4 LT |
606 | } |
607 | ||
608 | static int sr_probe(struct device *dev) | |
609 | { | |
610 | struct scsi_device *sdev = to_scsi_device(dev); | |
611 | struct gendisk *disk; | |
612 | struct scsi_cd *cd; | |
613 | int minor, error; | |
614 | ||
6fe8c1db | 615 | scsi_autopm_get_device(sdev); |
1da177e4 LT |
616 | error = -ENODEV; |
617 | if (sdev->type != TYPE_ROM && sdev->type != TYPE_WORM) | |
618 | goto fail; | |
619 | ||
620 | error = -ENOMEM; | |
24669f75 | 621 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); |
1da177e4 LT |
622 | if (!cd) |
623 | goto fail; | |
1da177e4 | 624 | |
6f8191fd CH |
625 | disk = blk_mq_alloc_disk_for_queue(sdev->request_queue, |
626 | &sr_bio_compl_lkclass); | |
1da177e4 LT |
627 | if (!disk) |
628 | goto fail_free; | |
51a85881 | 629 | mutex_init(&cd->lock); |
1da177e4 LT |
630 | |
631 | spin_lock(&sr_index_lock); | |
632 | minor = find_first_zero_bit(sr_index_bits, SR_DISKS); | |
633 | if (minor == SR_DISKS) { | |
634 | spin_unlock(&sr_index_lock); | |
635 | error = -EBUSY; | |
636 | goto fail_put; | |
637 | } | |
638 | __set_bit(minor, sr_index_bits); | |
639 | spin_unlock(&sr_index_lock); | |
640 | ||
641 | disk->major = SCSI_CDROM_MAJOR; | |
642 | disk->first_minor = minor; | |
a58bd768 | 643 | disk->minors = 1; |
1da177e4 LT |
644 | sprintf(disk->disk_name, "sr%d", minor); |
645 | disk->fops = &sr_bdops; | |
a4561f9f | 646 | disk->flags |= GENHD_FL_REMOVABLE | GENHD_FL_NO_PART; |
93aae17a | 647 | disk->events = DISK_EVENT_MEDIA_CHANGE | DISK_EVENT_EJECT_REQUEST; |
1545e0b4 CH |
648 | disk->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT | |
649 | DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE; | |
1da177e4 | 650 | |
242f9dcb JA |
651 | blk_queue_rq_timeout(sdev->request_queue, SR_TIMEOUT); |
652 | ||
1da177e4 LT |
653 | cd->device = sdev; |
654 | cd->disk = disk; | |
1da177e4 | 655 | cd->capacity = 0x1fffff; |
1da177e4 | 656 | cd->device->changed = 1; /* force recheck CD type */ |
93aae17a | 657 | cd->media_present = 1; |
1da177e4 LT |
658 | cd->use = 1; |
659 | cd->readcd_known = 0; | |
660 | cd->readcd_cdda = 0; | |
661 | ||
662 | cd->cdi.ops = &sr_dops; | |
663 | cd->cdi.handle = cd; | |
664 | cd->cdi.mask = 0; | |
665 | cd->cdi.capacity = 1; | |
666 | sprintf(cd->cdi.name, "sr%d", minor); | |
667 | ||
668 | sdev->sector_size = 2048; /* A guess, just in case */ | |
669 | ||
ebc95c79 EL |
670 | error = -ENOMEM; |
671 | if (get_capabilities(cd)) | |
672 | goto fail_minor; | |
1da177e4 LT |
673 | sr_vendor_init(cd); |
674 | ||
1da177e4 | 675 | set_capacity(disk, cd->capacity); |
e7f76552 | 676 | disk->private_data = cd; |
1da177e4 | 677 | |
a711d91c | 678 | if (register_cdrom(disk, &cd->cdi)) |
6555781b | 679 | goto fail_minor; |
1da177e4 | 680 | |
6627b38f AL |
681 | /* |
682 | * Initialize block layer runtime PM stuffs before the | |
683 | * periodic event checking request gets started in add_disk. | |
684 | */ | |
685 | blk_pm_runtime_init(sdev->request_queue, dev); | |
686 | ||
1da177e4 | 687 | dev_set_drvdata(dev, cd); |
38a2b557 | 688 | sr_revalidate_disk(cd); |
e9d658c2 LC |
689 | |
690 | error = device_add_disk(&sdev->sdev_gendev, disk, NULL); | |
01d0c698 CH |
691 | if (error) |
692 | goto unregister_cdrom; | |
1da177e4 | 693 | |
9ccfc756 JB |
694 | sdev_printk(KERN_DEBUG, sdev, |
695 | "Attached scsi CD-ROM %s\n", cd->cdi.name); | |
6c7f1e2f AL |
696 | scsi_autopm_put_device(cd->device); |
697 | ||
1da177e4 LT |
698 | return 0; |
699 | ||
01d0c698 CH |
700 | unregister_cdrom: |
701 | unregister_cdrom(&cd->cdi); | |
6555781b SA |
702 | fail_minor: |
703 | spin_lock(&sr_index_lock); | |
704 | clear_bit(minor, sr_index_bits); | |
705 | spin_unlock(&sr_index_lock); | |
1da177e4 LT |
706 | fail_put: |
707 | put_disk(disk); | |
a247e07f | 708 | mutex_destroy(&cd->lock); |
1da177e4 LT |
709 | fail_free: |
710 | kfree(cd); | |
711 | fail: | |
6fe8c1db | 712 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
713 | return error; |
714 | } | |
715 | ||
716 | ||
717 | static void get_sectorsize(struct scsi_cd *cd) | |
718 | { | |
719 | unsigned char cmd[10]; | |
62858dac | 720 | unsigned char buffer[8]; |
1da177e4 LT |
721 | int the_result, retries = 3; |
722 | int sector_size; | |
165125e1 | 723 | struct request_queue *queue; |
1da177e4 | 724 | |
1da177e4 LT |
725 | do { |
726 | cmd[0] = READ_CAPACITY; | |
727 | memset((void *) &cmd[1], 0, 9); | |
62858dac | 728 | memset(buffer, 0, sizeof(buffer)); |
1da177e4 LT |
729 | |
730 | /* Do the command and wait.. */ | |
49d33b62 MC |
731 | the_result = scsi_execute_cmd(cd->device, cmd, REQ_OP_DRV_IN, |
732 | buffer, sizeof(buffer), | |
f4f4e47e | 733 | SR_TIMEOUT, MAX_RETRIES, NULL); |
1da177e4 | 734 | |
1da177e4 LT |
735 | retries--; |
736 | ||
737 | } while (the_result && retries); | |
738 | ||
739 | ||
1da177e4 LT |
740 | if (the_result) { |
741 | cd->capacity = 0x1fffff; | |
742 | sector_size = 2048; /* A guess, just in case */ | |
1da177e4 | 743 | } else { |
5915136d TH |
744 | long last_written; |
745 | ||
655da8e5 | 746 | cd->capacity = 1 + get_unaligned_be32(&buffer[0]); |
5915136d TH |
747 | /* |
748 | * READ_CAPACITY doesn't return the correct size on | |
749 | * certain UDF media. If last_written is larger, use | |
750 | * it instead. | |
751 | * | |
752 | * http://bugzilla.kernel.org/show_bug.cgi?id=9668 | |
753 | */ | |
754 | if (!cdrom_get_last_written(&cd->cdi, &last_written)) | |
755 | cd->capacity = max_t(long, cd->capacity, last_written); | |
756 | ||
655da8e5 | 757 | sector_size = get_unaligned_be32(&buffer[4]); |
1da177e4 LT |
758 | switch (sector_size) { |
759 | /* | |
760 | * HP 4020i CD-Recorder reports 2340 byte sectors | |
761 | * Philips CD-Writers report 2352 byte sectors | |
762 | * | |
763 | * Use 2k sectors for them.. | |
764 | */ | |
765 | case 0: | |
766 | case 2340: | |
767 | case 2352: | |
768 | sector_size = 2048; | |
df561f66 | 769 | fallthrough; |
1da177e4 LT |
770 | case 2048: |
771 | cd->capacity *= 4; | |
df561f66 | 772 | fallthrough; |
1da177e4 LT |
773 | case 512: |
774 | break; | |
775 | default: | |
96eefad2 HR |
776 | sr_printk(KERN_INFO, cd, |
777 | "unsupported sector size %d.", sector_size); | |
1da177e4 | 778 | cd->capacity = 0; |
1da177e4 LT |
779 | } |
780 | ||
781 | cd->device->sector_size = sector_size; | |
782 | ||
783 | /* | |
784 | * Add this so that we have the ability to correctly gauge | |
785 | * what the device is capable of. | |
786 | */ | |
1da177e4 LT |
787 | set_capacity(cd->disk, cd->capacity); |
788 | } | |
789 | ||
790 | queue = cd->device->request_queue; | |
e1defc4f | 791 | blk_queue_logical_block_size(queue, sector_size); |
1da177e4 | 792 | |
62858dac | 793 | return; |
1da177e4 LT |
794 | } |
795 | ||
ebc95c79 | 796 | static int get_capabilities(struct scsi_cd *cd) |
1da177e4 LT |
797 | { |
798 | unsigned char *buffer; | |
799 | struct scsi_mode_data data; | |
820732b5 | 800 | struct scsi_sense_hdr sshdr; |
a00a7862 | 801 | unsigned int ms_len = 128; |
38582a62 | 802 | int rc, n; |
1da177e4 | 803 | |
0ad78200 | 804 | static const char *loadmech[] = |
1da177e4 LT |
805 | { |
806 | "caddy", | |
807 | "tray", | |
808 | "pop-up", | |
809 | "", | |
810 | "changer", | |
811 | "cartridge changer", | |
812 | "", | |
813 | "" | |
814 | }; | |
815 | ||
1da177e4 LT |
816 | |
817 | /* allocate transfer buffer */ | |
d94d9496 | 818 | buffer = kmalloc(512, GFP_KERNEL); |
1da177e4 | 819 | if (!buffer) { |
96eefad2 | 820 | sr_printk(KERN_ERR, cd, "out of memory.\n"); |
ebc95c79 | 821 | return -ENOMEM; |
1da177e4 LT |
822 | } |
823 | ||
38582a62 | 824 | /* eat unit attentions */ |
9f8a2c23 | 825 | scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr); |
1da177e4 LT |
826 | |
827 | /* ask for mode page 0x2a */ | |
a6cdc35f | 828 | rc = scsi_mode_sense(cd->device, 0, 0x2a, 0, buffer, ms_len, |
1cf72699 | 829 | SR_TIMEOUT, 3, &data, NULL); |
1da177e4 | 830 | |
8793613d | 831 | if (rc < 0 || data.length > ms_len || |
a00a7862 | 832 | data.header_length + data.block_descriptor_length > data.length) { |
1da177e4 LT |
833 | /* failed, drive doesn't have capabilities mode page */ |
834 | cd->cdi.speed = 1; | |
835 | cd->cdi.mask |= (CDC_CD_R | CDC_CD_RW | CDC_DVD_R | | |
bcc1e382 CE |
836 | CDC_DVD | CDC_DVD_RAM | |
837 | CDC_SELECT_DISC | CDC_SELECT_SPEED | | |
838 | CDC_MRW | CDC_MRW_W | CDC_RAM); | |
1da177e4 | 839 | kfree(buffer); |
96eefad2 | 840 | sr_printk(KERN_INFO, cd, "scsi-1 drive"); |
ebc95c79 | 841 | return 0; |
1da177e4 LT |
842 | } |
843 | ||
844 | n = data.header_length + data.block_descriptor_length; | |
655da8e5 | 845 | cd->cdi.speed = get_unaligned_be16(&buffer[n + 8]) / 176; |
1da177e4 LT |
846 | cd->readcd_known = 1; |
847 | cd->readcd_cdda = buffer[n + 5] & 0x01; | |
848 | /* print some capability bits */ | |
96eefad2 HR |
849 | sr_printk(KERN_INFO, cd, |
850 | "scsi3-mmc drive: %dx/%dx %s%s%s%s%s%s\n", | |
655da8e5 | 851 | get_unaligned_be16(&buffer[n + 14]) / 176, |
96eefad2 HR |
852 | cd->cdi.speed, |
853 | buffer[n + 3] & 0x01 ? "writer " : "", /* CD Writer */ | |
854 | buffer[n + 3] & 0x20 ? "dvd-ram " : "", | |
855 | buffer[n + 2] & 0x02 ? "cd/rw " : "", /* can read rewriteable */ | |
856 | buffer[n + 4] & 0x20 ? "xa/form2 " : "", /* can read xa/from2 */ | |
857 | buffer[n + 5] & 0x01 ? "cdda " : "", /* can read audio data */ | |
858 | loadmech[buffer[n + 6] >> 5]); | |
1da177e4 LT |
859 | if ((buffer[n + 6] >> 5) == 0) |
860 | /* caddy drives can't close tray... */ | |
861 | cd->cdi.mask |= CDC_CLOSE_TRAY; | |
862 | if ((buffer[n + 2] & 0x8) == 0) | |
863 | /* not a DVD drive */ | |
864 | cd->cdi.mask |= CDC_DVD; | |
96eefad2 | 865 | if ((buffer[n + 3] & 0x20) == 0) |
1da177e4 LT |
866 | /* can't write DVD-RAM media */ |
867 | cd->cdi.mask |= CDC_DVD_RAM; | |
868 | if ((buffer[n + 3] & 0x10) == 0) | |
869 | /* can't write DVD-R media */ | |
870 | cd->cdi.mask |= CDC_DVD_R; | |
871 | if ((buffer[n + 3] & 0x2) == 0) | |
872 | /* can't write CD-RW media */ | |
873 | cd->cdi.mask |= CDC_CD_RW; | |
874 | if ((buffer[n + 3] & 0x1) == 0) | |
875 | /* can't write CD-R media */ | |
876 | cd->cdi.mask |= CDC_CD_R; | |
877 | if ((buffer[n + 6] & 0x8) == 0) | |
878 | /* can't eject */ | |
879 | cd->cdi.mask |= CDC_OPEN_TRAY; | |
880 | ||
881 | if ((buffer[n + 6] >> 5) == mechtype_individual_changer || | |
882 | (buffer[n + 6] >> 5) == mechtype_cartridge_changer) | |
883 | cd->cdi.capacity = | |
884 | cdrom_number_of_slots(&cd->cdi); | |
885 | if (cd->cdi.capacity <= 1) | |
886 | /* not a changer */ | |
887 | cd->cdi.mask |= CDC_SELECT_DISC; | |
888 | /*else I don't think it can close its tray | |
889 | cd->cdi.mask |= CDC_CLOSE_TRAY; */ | |
890 | ||
891 | /* | |
892 | * if DVD-RAM, MRW-W or CD-RW, we are randomly writable | |
893 | */ | |
894 | if ((cd->cdi.mask & (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) != | |
895 | (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) { | |
fd2eb903 | 896 | cd->writeable = 1; |
1da177e4 LT |
897 | } |
898 | ||
1da177e4 | 899 | kfree(buffer); |
ebc95c79 | 900 | return 0; |
1da177e4 LT |
901 | } |
902 | ||
903 | /* | |
904 | * sr_packet() is the entry point for the generic commands generated | |
96eefad2 | 905 | * by the Uniform CD-ROM layer. |
1da177e4 LT |
906 | */ |
907 | static int sr_packet(struct cdrom_device_info *cdi, | |
908 | struct packet_command *cgc) | |
909 | { | |
8e04d805 HG |
910 | struct scsi_cd *cd = cdi->handle; |
911 | struct scsi_device *sdev = cd->device; | |
912 | ||
913 | if (cgc->cmd[0] == GPCMD_READ_DISC_INFO && sdev->no_read_disc_info) | |
914 | return -EDRIVE_CANT_DO_THIS; | |
915 | ||
1da177e4 LT |
916 | if (cgc->timeout <= 0) |
917 | cgc->timeout = IOCTL_TIMEOUT; | |
918 | ||
8e04d805 | 919 | sr_do_ioctl(cd, cgc); |
1da177e4 LT |
920 | |
921 | return cgc->stat; | |
922 | } | |
923 | ||
ba51bdaf CH |
924 | static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf, |
925 | u32 lba, u32 nr, u8 *last_sense) | |
926 | { | |
927 | struct gendisk *disk = cdi->disk; | |
928 | u32 len = nr * CD_FRAMESIZE_RAW; | |
ce70fd9a | 929 | struct scsi_cmnd *scmd; |
ba51bdaf CH |
930 | struct request *rq; |
931 | struct bio *bio; | |
932 | int ret; | |
933 | ||
68ec3b81 | 934 | rq = scsi_alloc_request(disk->queue, REQ_OP_DRV_IN, 0); |
ba51bdaf CH |
935 | if (IS_ERR(rq)) |
936 | return PTR_ERR(rq); | |
ce70fd9a | 937 | scmd = blk_mq_rq_to_pdu(rq); |
ba51bdaf CH |
938 | |
939 | ret = blk_rq_map_user(disk->queue, rq, NULL, ubuf, len, GFP_KERNEL); | |
940 | if (ret) | |
941 | goto out_put_request; | |
942 | ||
ce70fd9a CH |
943 | scmd->cmnd[0] = GPCMD_READ_CD; |
944 | scmd->cmnd[1] = 1 << 2; | |
945 | scmd->cmnd[2] = (lba >> 24) & 0xff; | |
946 | scmd->cmnd[3] = (lba >> 16) & 0xff; | |
947 | scmd->cmnd[4] = (lba >> 8) & 0xff; | |
948 | scmd->cmnd[5] = lba & 0xff; | |
949 | scmd->cmnd[6] = (nr >> 16) & 0xff; | |
950 | scmd->cmnd[7] = (nr >> 8) & 0xff; | |
951 | scmd->cmnd[8] = nr & 0xff; | |
952 | scmd->cmnd[9] = 0xf8; | |
953 | scmd->cmd_len = 12; | |
ba51bdaf CH |
954 | rq->timeout = 60 * HZ; |
955 | bio = rq->bio; | |
956 | ||
b84ba30b | 957 | blk_execute_rq(rq, false); |
dbb4c84d | 958 | if (scmd->result) { |
ba51bdaf CH |
959 | struct scsi_sense_hdr sshdr; |
960 | ||
5b794f98 | 961 | scsi_normalize_sense(scmd->sense_buffer, scmd->sense_len, |
ba51bdaf CH |
962 | &sshdr); |
963 | *last_sense = sshdr.sense_key; | |
964 | ret = -EIO; | |
965 | } | |
966 | ||
967 | if (blk_rq_unmap_user(bio)) | |
968 | ret = -EFAULT; | |
969 | out_put_request: | |
0bf6d96c | 970 | blk_mq_free_request(rq); |
ba51bdaf CH |
971 | return ret; |
972 | } | |
973 | ||
1da177e4 LT |
974 | static int sr_remove(struct device *dev) |
975 | { | |
976 | struct scsi_cd *cd = dev_get_drvdata(dev); | |
977 | ||
6c7f1e2f AL |
978 | scsi_autopm_get_device(cd->device); |
979 | ||
1da177e4 | 980 | del_gendisk(cd->disk); |
01d0c698 | 981 | put_disk(cd->disk); |
1da177e4 LT |
982 | |
983 | return 0; | |
984 | } | |
985 | ||
986 | static int __init init_sr(void) | |
987 | { | |
988 | int rc; | |
989 | ||
990 | rc = register_blkdev(SCSI_CDROM_MAJOR, "sr"); | |
991 | if (rc) | |
992 | return rc; | |
da3962fe AM |
993 | rc = scsi_register_driver(&sr_template.gendrv); |
994 | if (rc) | |
995 | unregister_blkdev(SCSI_CDROM_MAJOR, "sr"); | |
996 | ||
997 | return rc; | |
1da177e4 LT |
998 | } |
999 | ||
1000 | static void __exit exit_sr(void) | |
1001 | { | |
1002 | scsi_unregister_driver(&sr_template.gendrv); | |
1003 | unregister_blkdev(SCSI_CDROM_MAJOR, "sr"); | |
1004 | } | |
1005 | ||
1006 | module_init(init_sr); | |
1007 | module_exit(exit_sr); | |
1008 | MODULE_LICENSE("GPL"); |