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35#include <linux/module.h>
36#include <linux/fs.h>
37#include <linux/kernel.h>
38#include <linux/mm.h>
39#include <linux/bio.h>
40#include <linux/string.h>
41#include <linux/errno.h>
42#include <linux/cdrom.h>
43#include <linux/interrupt.h>
44#include <linux/init.h>
45#include <linux/blkdev.h>
46#include <linux/mutex.h>
47#include <linux/slab.h>
48#include <linux/pm_runtime.h>
49#include <asm/uaccess.h>
50
51#include <scsi/scsi.h>
52#include <scsi/scsi_dbg.h>
53#include <scsi/scsi_device.h>
54#include <scsi/scsi_driver.h>
55#include <scsi/scsi_cmnd.h>
56#include <scsi/scsi_eh.h>
57#include <scsi/scsi_host.h>
58#include <scsi/scsi_ioctl.h>
59
60#include "scsi_logging.h"
61#include "sr.h"
62
63
64MODULE_DESCRIPTION("SCSI cdrom (sr) driver");
65MODULE_LICENSE("GPL");
66MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_CDROM_MAJOR);
67MODULE_ALIAS_SCSI_DEVICE(TYPE_ROM);
68MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM);
69
70#define SR_DISKS 256
71
72#define SR_CAPABILITIES \
73 (CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|CDC_SELECT_SPEED| \
74 CDC_SELECT_DISC|CDC_MULTI_SESSION|CDC_MCN|CDC_MEDIA_CHANGED| \
75 CDC_PLAY_AUDIO|CDC_RESET|CDC_DRIVE_STATUS| \
76 CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_DVD_RAM|CDC_GENERIC_PACKET| \
77 CDC_MRW|CDC_MRW_W|CDC_RAM)
78
79static DEFINE_MUTEX(sr_mutex);
80static int sr_probe(struct device *);
81static int sr_remove(struct device *);
82static int sr_done(struct scsi_cmnd *);
83static int sr_runtime_suspend(struct device *dev);
84
85static struct dev_pm_ops sr_pm_ops = {
86 .runtime_suspend = sr_runtime_suspend,
87};
88
89static struct scsi_driver sr_template = {
90 .owner = THIS_MODULE,
91 .gendrv = {
92 .name = "sr",
93 .probe = sr_probe,
94 .remove = sr_remove,
95 .pm = &sr_pm_ops,
96 },
97 .done = sr_done,
98};
99
100static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
101static DEFINE_SPINLOCK(sr_index_lock);
102
103
104
105
106static DEFINE_MUTEX(sr_ref_mutex);
107
108static int sr_open(struct cdrom_device_info *, int);
109static void sr_release(struct cdrom_device_info *);
110
111static void get_sectorsize(struct scsi_cd *);
112static void get_capabilities(struct scsi_cd *);
113
114static unsigned int sr_check_events(struct cdrom_device_info *cdi,
115 unsigned int clearing, int slot);
116static int sr_packet(struct cdrom_device_info *, struct packet_command *);
117
118static struct cdrom_device_ops sr_dops = {
119 .open = sr_open,
120 .release = sr_release,
121 .drive_status = sr_drive_status,
122 .check_events = sr_check_events,
123 .tray_move = sr_tray_move,
124 .lock_door = sr_lock_door,
125 .select_speed = sr_select_speed,
126 .get_last_session = sr_get_last_session,
127 .get_mcn = sr_get_mcn,
128 .reset = sr_reset,
129 .audio_ioctl = sr_audio_ioctl,
130 .capability = SR_CAPABILITIES,
131 .generic_packet = sr_packet,
132};
133
134static void sr_kref_release(struct kref *kref);
135
136static inline struct scsi_cd *scsi_cd(struct gendisk *disk)
137{
138 return container_of(disk->private_data, struct scsi_cd, driver);
139}
140
141static int sr_runtime_suspend(struct device *dev)
142{
143 struct scsi_cd *cd = dev_get_drvdata(dev);
144
145 if (cd->media_present)
146 return -EBUSY;
147 else
148 return 0;
149}
150
151
152
153
154
155static inline struct scsi_cd *scsi_cd_get(struct gendisk *disk)
156{
157 struct scsi_cd *cd = NULL;
158
159 mutex_lock(&sr_ref_mutex);
160 if (disk->private_data == NULL)
161 goto out;
162 cd = scsi_cd(disk);
163 kref_get(&cd->kref);
164 if (scsi_device_get(cd->device))
165 goto out_put;
166 if (!scsi_autopm_get_device(cd->device))
167 goto out;
168
169 out_put:
170 kref_put(&cd->kref, sr_kref_release);
171 cd = NULL;
172 out:
173 mutex_unlock(&sr_ref_mutex);
174 return cd;
175}
176
177static void scsi_cd_put(struct scsi_cd *cd)
178{
179 struct scsi_device *sdev = cd->device;
180
181 mutex_lock(&sr_ref_mutex);
182 kref_put(&cd->kref, sr_kref_release);
183 scsi_autopm_put_device(sdev);
184 scsi_device_put(sdev);
185 mutex_unlock(&sr_ref_mutex);
186}
187
188static unsigned int sr_get_events(struct scsi_device *sdev)
189{
190 u8 buf[8];
191 u8 cmd[] = { GET_EVENT_STATUS_NOTIFICATION,
192 1,
193 0, 0,
194 1 << 4,
195 0, 0,
196 0, sizeof(buf),
197 0,
198 };
199 struct event_header *eh = (void *)buf;
200 struct media_event_desc *med = (void *)(buf + 4);
201 struct scsi_sense_hdr sshdr;
202 int result;
203
204 result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, sizeof(buf),
205 &sshdr, SR_TIMEOUT, MAX_RETRIES, NULL);
206 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == UNIT_ATTENTION)
207 return DISK_EVENT_MEDIA_CHANGE;
208
209 if (result || be16_to_cpu(eh->data_len) < sizeof(*med))
210 return 0;
211
212 if (eh->nea || eh->notification_class != 0x4)
213 return 0;
214
215 if (med->media_event_code == 1)
216 return DISK_EVENT_EJECT_REQUEST;
217 else if (med->media_event_code == 2)
218 return DISK_EVENT_MEDIA_CHANGE;
219 return 0;
220}
221
222
223
224
225
226
227
228
229static unsigned int sr_check_events(struct cdrom_device_info *cdi,
230 unsigned int clearing, int slot)
231{
232 struct scsi_cd *cd = cdi->handle;
233 bool last_present;
234 struct scsi_sense_hdr sshdr;
235 unsigned int events;
236 int ret;
237
238
239 if (CDSL_CURRENT != slot)
240 return 0;
241
242 events = sr_get_events(cd->device);
243 cd->get_event_changed |= events & DISK_EVENT_MEDIA_CHANGE;
244
245
246
247
248
249
250
251 if (cd->ignore_get_event) {
252 events &= ~DISK_EVENT_MEDIA_CHANGE;
253 goto do_tur;
254 }
255
256
257
258
259
260
261 if (cd->device->changed) {
262 events |= DISK_EVENT_MEDIA_CHANGE;
263 cd->device->changed = 0;
264 cd->tur_changed = true;
265 }
266
267 if (!(clearing & DISK_EVENT_MEDIA_CHANGE))
268 return events;
269do_tur:
270
271 last_present = cd->media_present;
272 ret = scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr);
273
274
275
276
277
278
279 cd->media_present = scsi_status_is_good(ret) ||
280 (scsi_sense_valid(&sshdr) && sshdr.asc != 0x3a);
281
282 if (last_present != cd->media_present)
283 cd->device->changed = 1;
284
285 if (cd->device->changed) {
286 events |= DISK_EVENT_MEDIA_CHANGE;
287 cd->device->changed = 0;
288 cd->tur_changed = true;
289 }
290
291 if (cd->ignore_get_event)
292 return events;
293
294
295 if (!cd->tur_changed) {
296 if (cd->get_event_changed) {
297 if (cd->tur_mismatch++ > 8) {
298 sdev_printk(KERN_WARNING, cd->device,
299 "GET_EVENT and TUR disagree continuously, suppress GET_EVENT events\n");
300 cd->ignore_get_event = true;
301 }
302 } else {
303 cd->tur_mismatch = 0;
304 }
305 }
306 cd->tur_changed = false;
307 cd->get_event_changed = false;
308
309 return events;
310}
311
312
313
314
315
316
317
318static int sr_done(struct scsi_cmnd *SCpnt)
319{
320 int result = SCpnt->result;
321 int this_count = scsi_bufflen(SCpnt);
322 int good_bytes = (result == 0 ? this_count : 0);
323 int block_sectors = 0;
324 long error_sector;
325 struct scsi_cd *cd = scsi_cd(SCpnt->request->rq_disk);
326
327#ifdef DEBUG
328 printk("sr.c done: %x\n", result);
329#endif
330
331
332
333
334
335
336
337 if (driver_byte(result) != 0 &&
338 (SCpnt->sense_buffer[0] & 0x7f) == 0x70) {
339 switch (SCpnt->sense_buffer[2]) {
340 case MEDIUM_ERROR:
341 case VOLUME_OVERFLOW:
342 case ILLEGAL_REQUEST:
343 if (!(SCpnt->sense_buffer[0] & 0x90))
344 break;
345 error_sector = (SCpnt->sense_buffer[3] << 24) |
346 (SCpnt->sense_buffer[4] << 16) |
347 (SCpnt->sense_buffer[5] << 8) |
348 SCpnt->sense_buffer[6];
349 if (SCpnt->request->bio != NULL)
350 block_sectors =
351 bio_sectors(SCpnt->request->bio);
352 if (block_sectors < 4)
353 block_sectors = 4;
354 if (cd->device->sector_size == 2048)
355 error_sector <<= 2;
356 error_sector &= ~(block_sectors - 1);
357 good_bytes = (error_sector -
358 blk_rq_pos(SCpnt->request)) << 9;
359 if (good_bytes < 0 || good_bytes >= this_count)
360 good_bytes = 0;
361
362
363
364
365
366
367
368
369 if (error_sector < get_capacity(cd->disk) &&
370 cd->capacity - error_sector < 4 * 75)
371 set_capacity(cd->disk, error_sector);
372 break;
373
374 case RECOVERED_ERROR:
375 good_bytes = this_count;
376 break;
377
378 default:
379 break;
380 }
381 }
382
383 return good_bytes;
384}
385
386static int sr_prep_fn(struct request_queue *q, struct request *rq)
387{
388 int block = 0, this_count, s_size;
389 struct scsi_cd *cd;
390 struct scsi_cmnd *SCpnt;
391 struct scsi_device *sdp = q->queuedata;
392 int ret;
393
394 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
395 ret = scsi_setup_blk_pc_cmnd(sdp, rq);
396 goto out;
397 } else if (rq->cmd_type != REQ_TYPE_FS) {
398 ret = BLKPREP_KILL;
399 goto out;
400 }
401 ret = scsi_setup_fs_cmnd(sdp, rq);
402 if (ret != BLKPREP_OK)
403 goto out;
404 SCpnt = rq->special;
405 cd = scsi_cd(rq->rq_disk);
406
407
408
409 ret = BLKPREP_KILL;
410
411 SCSI_LOG_HLQUEUE(1, printk("Doing sr request, dev = %s, block = %d\n",
412 cd->disk->disk_name, block));
413
414 if (!cd->device || !scsi_device_online(cd->device)) {
415 SCSI_LOG_HLQUEUE(2, printk("Finishing %u sectors\n",
416 blk_rq_sectors(rq)));
417 SCSI_LOG_HLQUEUE(2, printk("Retry with 0x%p\n", SCpnt));
418 goto out;
419 }
420
421 if (cd->device->changed) {
422
423
424
425
426 goto out;
427 }
428
429
430
431
432
433 s_size = cd->device->sector_size;
434 if (s_size > 2048) {
435 if (!in_interrupt())
436 sr_set_blocklength(cd, 2048);
437 else
438 printk("sr: can't switch blocksize: in interrupt\n");
439 }
440
441 if (s_size != 512 && s_size != 1024 && s_size != 2048) {
442 scmd_printk(KERN_ERR, SCpnt, "bad sector size %d\n", s_size);
443 goto out;
444 }
445
446 if (rq_data_dir(rq) == WRITE) {
447 if (!cd->device->writeable)
448 goto out;
449 SCpnt->cmnd[0] = WRITE_10;
450 SCpnt->sc_data_direction = DMA_TO_DEVICE;
451 cd->cdi.media_written = 1;
452 } else if (rq_data_dir(rq) == READ) {
453 SCpnt->cmnd[0] = READ_10;
454 SCpnt->sc_data_direction = DMA_FROM_DEVICE;
455 } else {
456 blk_dump_rq_flags(rq, "Unknown sr command");
457 goto out;
458 }
459
460 {
461 struct scatterlist *sg;
462 int i, size = 0, sg_count = scsi_sg_count(SCpnt);
463
464 scsi_for_each_sg(SCpnt, sg, sg_count, i)
465 size += sg->length;
466
467 if (size != scsi_bufflen(SCpnt)) {
468 scmd_printk(KERN_ERR, SCpnt,
469 "mismatch count %d, bytes %d\n",
470 size, scsi_bufflen(SCpnt));
471 if (scsi_bufflen(SCpnt) > size)
472 SCpnt->sdb.length = size;
473 }
474 }
475
476
477
478
479 if (((unsigned int)blk_rq_pos(rq) % (s_size >> 9)) ||
480 (scsi_bufflen(SCpnt) % s_size)) {
481 scmd_printk(KERN_NOTICE, SCpnt, "unaligned transfer\n");
482 goto out;
483 }
484
485 this_count = (scsi_bufflen(SCpnt) >> 9) / (s_size >> 9);
486
487
488 SCSI_LOG_HLQUEUE(2, printk("%s : %s %d/%u 512 byte blocks.\n",
489 cd->cdi.name,
490 (rq_data_dir(rq) == WRITE) ?
491 "writing" : "reading",
492 this_count, blk_rq_sectors(rq)));
493
494 SCpnt->cmnd[1] = 0;
495 block = (unsigned int)blk_rq_pos(rq) / (s_size >> 9);
496
497 if (this_count > 0xffff) {
498 this_count = 0xffff;
499 SCpnt->sdb.length = this_count * s_size;
500 }
501
502 SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
503 SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
504 SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
505 SCpnt->cmnd[5] = (unsigned char) block & 0xff;
506 SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0;
507 SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
508 SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
509
510
511
512
513
514
515 SCpnt->transfersize = cd->device->sector_size;
516 SCpnt->underflow = this_count << 9;
517 SCpnt->allowed = MAX_RETRIES;
518
519
520
521
522
523 ret = BLKPREP_OK;
524 out:
525 return scsi_prep_return(q, rq, ret);
526}
527
528static int sr_block_open(struct block_device *bdev, fmode_t mode)
529{
530 struct scsi_cd *cd;
531 int ret = -ENXIO;
532
533 mutex_lock(&sr_mutex);
534 cd = scsi_cd_get(bdev->bd_disk);
535 if (cd) {
536 ret = cdrom_open(&cd->cdi, bdev, mode);
537 if (ret)
538 scsi_cd_put(cd);
539 }
540 mutex_unlock(&sr_mutex);
541 return ret;
542}
543
544static void sr_block_release(struct gendisk *disk, fmode_t mode)
545{
546 struct scsi_cd *cd = scsi_cd(disk);
547 mutex_lock(&sr_mutex);
548 cdrom_release(&cd->cdi, mode);
549 scsi_cd_put(cd);
550 mutex_unlock(&sr_mutex);
551}
552
553static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
554 unsigned long arg)
555{
556 struct scsi_cd *cd = scsi_cd(bdev->bd_disk);
557 struct scsi_device *sdev = cd->device;
558 void __user *argp = (void __user *)arg;
559 int ret;
560
561 scsi_autopm_get_device(cd->device);
562
563 mutex_lock(&sr_mutex);
564
565
566
567
568
569 switch (cmd) {
570 case SCSI_IOCTL_GET_IDLUN:
571 case SCSI_IOCTL_GET_BUS_NUMBER:
572 ret = scsi_ioctl(sdev, cmd, argp);
573 goto out;
574 }
575
576 ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
577 if (ret != -ENOSYS)
578 goto out;
579
580
581
582
583
584
585
586 ret = scsi_nonblockable_ioctl(sdev, cmd, argp,
587 (mode & FMODE_NDELAY) != 0);
588 if (ret != -ENODEV)
589 goto out;
590 ret = scsi_ioctl(sdev, cmd, argp);
591
592out:
593 mutex_unlock(&sr_mutex);
594 scsi_autopm_put_device(cd->device);
595 return ret;
596}
597
598static unsigned int sr_block_check_events(struct gendisk *disk,
599 unsigned int clearing)
600{
601 struct scsi_cd *cd = scsi_cd(disk);
602 unsigned int ret;
603
604 if (atomic_read(&cd->device->disk_events_disable_depth) == 0) {
605 scsi_autopm_get_device(cd->device);
606 ret = cdrom_check_events(&cd->cdi, clearing);
607 scsi_autopm_put_device(cd->device);
608 } else {
609 ret = 0;
610 }
611
612 return ret;
613}
614
615static int sr_block_revalidate_disk(struct gendisk *disk)
616{
617 struct scsi_cd *cd = scsi_cd(disk);
618 struct scsi_sense_hdr sshdr;
619
620 scsi_autopm_get_device(cd->device);
621
622
623 if (scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
624 goto out;
625
626 sr_cd_check(&cd->cdi);
627 get_sectorsize(cd);
628out:
629 scsi_autopm_put_device(cd->device);
630 return 0;
631}
632
633static const struct block_device_operations sr_bdops =
634{
635 .owner = THIS_MODULE,
636 .open = sr_block_open,
637 .release = sr_block_release,
638 .ioctl = sr_block_ioctl,
639 .check_events = sr_block_check_events,
640 .revalidate_disk = sr_block_revalidate_disk,
641
642
643
644
645};
646
647static int sr_open(struct cdrom_device_info *cdi, int purpose)
648{
649 struct scsi_cd *cd = cdi->handle;
650 struct scsi_device *sdev = cd->device;
651 int retval;
652
653
654
655
656
657 retval = -ENXIO;
658 if (!scsi_block_when_processing_errors(sdev))
659 goto error_out;
660
661 return 0;
662
663error_out:
664 return retval;
665}
666
667static void sr_release(struct cdrom_device_info *cdi)
668{
669 struct scsi_cd *cd = cdi->handle;
670
671 if (cd->device->sector_size > 2048)
672 sr_set_blocklength(cd, 2048);
673
674}
675
676static int sr_probe(struct device *dev)
677{
678 struct scsi_device *sdev = to_scsi_device(dev);
679 struct gendisk *disk;
680 struct scsi_cd *cd;
681 int minor, error;
682
683 error = -ENODEV;
684 if (sdev->type != TYPE_ROM && sdev->type != TYPE_WORM)
685 goto fail;
686
687 error = -ENOMEM;
688 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
689 if (!cd)
690 goto fail;
691
692 kref_init(&cd->kref);
693
694 disk = alloc_disk(1);
695 if (!disk)
696 goto fail_free;
697
698 spin_lock(&sr_index_lock);
699 minor = find_first_zero_bit(sr_index_bits, SR_DISKS);
700 if (minor == SR_DISKS) {
701 spin_unlock(&sr_index_lock);
702 error = -EBUSY;
703 goto fail_put;
704 }
705 __set_bit(minor, sr_index_bits);
706 spin_unlock(&sr_index_lock);
707
708 disk->major = SCSI_CDROM_MAJOR;
709 disk->first_minor = minor;
710 sprintf(disk->disk_name, "sr%d", minor);
711 disk->fops = &sr_bdops;
712 disk->flags = GENHD_FL_CD | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
713 disk->events = DISK_EVENT_MEDIA_CHANGE | DISK_EVENT_EJECT_REQUEST;
714
715 blk_queue_rq_timeout(sdev->request_queue, SR_TIMEOUT);
716
717 cd->device = sdev;
718 cd->disk = disk;
719 cd->driver = &sr_template;
720 cd->disk = disk;
721 cd->capacity = 0x1fffff;
722 cd->device->changed = 1;
723 cd->media_present = 1;
724 cd->use = 1;
725 cd->readcd_known = 0;
726 cd->readcd_cdda = 0;
727
728 cd->cdi.ops = &sr_dops;
729 cd->cdi.handle = cd;
730 cd->cdi.mask = 0;
731 cd->cdi.capacity = 1;
732 sprintf(cd->cdi.name, "sr%d", minor);
733
734 sdev->sector_size = 2048;
735
736
737 get_capabilities(cd);
738 blk_queue_prep_rq(sdev->request_queue, sr_prep_fn);
739 sr_vendor_init(cd);
740
741 disk->driverfs_dev = &sdev->sdev_gendev;
742 set_capacity(disk, cd->capacity);
743 disk->private_data = &cd->driver;
744 disk->queue = sdev->request_queue;
745 cd->cdi.disk = disk;
746
747 if (register_cdrom(&cd->cdi))
748 goto fail_put;
749
750 dev_set_drvdata(dev, cd);
751 disk->flags |= GENHD_FL_REMOVABLE;
752 add_disk(disk);
753
754 sdev_printk(KERN_DEBUG, sdev,
755 "Attached scsi CD-ROM %s\n", cd->cdi.name);
756 scsi_autopm_put_device(cd->device);
757
758 return 0;
759
760fail_put:
761 put_disk(disk);
762fail_free:
763 kfree(cd);
764fail:
765 return error;
766}
767
768
769static void get_sectorsize(struct scsi_cd *cd)
770{
771 unsigned char cmd[10];
772 unsigned char buffer[8];
773 int the_result, retries = 3;
774 int sector_size;
775 struct request_queue *queue;
776
777 do {
778 cmd[0] = READ_CAPACITY;
779 memset((void *) &cmd[1], 0, 9);
780 memset(buffer, 0, sizeof(buffer));
781
782
783 the_result = scsi_execute_req(cd->device, cmd, DMA_FROM_DEVICE,
784 buffer, sizeof(buffer), NULL,
785 SR_TIMEOUT, MAX_RETRIES, NULL);
786
787 retries--;
788
789 } while (the_result && retries);
790
791
792 if (the_result) {
793 cd->capacity = 0x1fffff;
794 sector_size = 2048;
795 } else {
796 long last_written;
797
798 cd->capacity = 1 + ((buffer[0] << 24) | (buffer[1] << 16) |
799 (buffer[2] << 8) | buffer[3]);
800
801
802
803
804
805
806
807 if (!cdrom_get_last_written(&cd->cdi, &last_written))
808 cd->capacity = max_t(long, cd->capacity, last_written);
809
810 sector_size = (buffer[4] << 24) |
811 (buffer[5] << 16) | (buffer[6] << 8) | buffer[7];
812 switch (sector_size) {
813
814
815
816
817
818
819 case 0:
820 case 2340:
821 case 2352:
822 sector_size = 2048;
823
824 case 2048:
825 cd->capacity *= 4;
826
827 case 512:
828 break;
829 default:
830 printk("%s: unsupported sector size %d.\n",
831 cd->cdi.name, sector_size);
832 cd->capacity = 0;
833 }
834
835 cd->device->sector_size = sector_size;
836
837
838
839
840
841 set_capacity(cd->disk, cd->capacity);
842 }
843
844 queue = cd->device->request_queue;
845 blk_queue_logical_block_size(queue, sector_size);
846
847 return;
848}
849
850static void get_capabilities(struct scsi_cd *cd)
851{
852 unsigned char *buffer;
853 struct scsi_mode_data data;
854 struct scsi_sense_hdr sshdr;
855 int rc, n;
856
857 static const char *loadmech[] =
858 {
859 "caddy",
860 "tray",
861 "pop-up",
862 "",
863 "changer",
864 "cartridge changer",
865 "",
866 ""
867 };
868
869
870
871 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
872 if (!buffer) {
873 printk(KERN_ERR "sr: out of memory.\n");
874 return;
875 }
876
877
878 scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr);
879
880
881 rc = scsi_mode_sense(cd->device, 0, 0x2a, buffer, 128,
882 SR_TIMEOUT, 3, &data, NULL);
883
884 if (!scsi_status_is_good(rc)) {
885
886 cd->cdi.speed = 1;
887 cd->cdi.mask |= (CDC_CD_R | CDC_CD_RW | CDC_DVD_R |
888 CDC_DVD | CDC_DVD_RAM |
889 CDC_SELECT_DISC | CDC_SELECT_SPEED |
890 CDC_MRW | CDC_MRW_W | CDC_RAM);
891 kfree(buffer);
892 printk("%s: scsi-1 drive\n", cd->cdi.name);
893 return;
894 }
895
896 n = data.header_length + data.block_descriptor_length;
897 cd->cdi.speed = ((buffer[n + 8] << 8) + buffer[n + 9]) / 176;
898 cd->readcd_known = 1;
899 cd->readcd_cdda = buffer[n + 5] & 0x01;
900
901 printk("%s: scsi3-mmc drive: %dx/%dx %s%s%s%s%s%s\n", cd->cdi.name,
902 ((buffer[n + 14] << 8) + buffer[n + 15]) / 176,
903 cd->cdi.speed,
904 buffer[n + 3] & 0x01 ? "writer " : "",
905 buffer[n + 3] & 0x20 ? "dvd-ram " : "",
906 buffer[n + 2] & 0x02 ? "cd/rw " : "",
907 buffer[n + 4] & 0x20 ? "xa/form2 " : "",
908 buffer[n + 5] & 0x01 ? "cdda " : "",
909 loadmech[buffer[n + 6] >> 5]);
910 if ((buffer[n + 6] >> 5) == 0)
911
912 cd->cdi.mask |= CDC_CLOSE_TRAY;
913 if ((buffer[n + 2] & 0x8) == 0)
914
915 cd->cdi.mask |= CDC_DVD;
916 if ((buffer[n + 3] & 0x20) == 0)
917
918 cd->cdi.mask |= CDC_DVD_RAM;
919 if ((buffer[n + 3] & 0x10) == 0)
920
921 cd->cdi.mask |= CDC_DVD_R;
922 if ((buffer[n + 3] & 0x2) == 0)
923
924 cd->cdi.mask |= CDC_CD_RW;
925 if ((buffer[n + 3] & 0x1) == 0)
926
927 cd->cdi.mask |= CDC_CD_R;
928 if ((buffer[n + 6] & 0x8) == 0)
929
930 cd->cdi.mask |= CDC_OPEN_TRAY;
931
932 if ((buffer[n + 6] >> 5) == mechtype_individual_changer ||
933 (buffer[n + 6] >> 5) == mechtype_cartridge_changer)
934 cd->cdi.capacity =
935 cdrom_number_of_slots(&cd->cdi);
936 if (cd->cdi.capacity <= 1)
937
938 cd->cdi.mask |= CDC_SELECT_DISC;
939
940
941
942
943
944
945 if ((cd->cdi.mask & (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) !=
946 (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) {
947 cd->device->writeable = 1;
948 }
949
950 kfree(buffer);
951}
952
953
954
955
956
957static int sr_packet(struct cdrom_device_info *cdi,
958 struct packet_command *cgc)
959{
960 struct scsi_cd *cd = cdi->handle;
961 struct scsi_device *sdev = cd->device;
962
963 if (cgc->cmd[0] == GPCMD_READ_DISC_INFO && sdev->no_read_disc_info)
964 return -EDRIVE_CANT_DO_THIS;
965
966 if (cgc->timeout <= 0)
967 cgc->timeout = IOCTL_TIMEOUT;
968
969 sr_do_ioctl(cd, cgc);
970
971 return cgc->stat;
972}
973
974
975
976
977
978
979
980
981
982
983static void sr_kref_release(struct kref *kref)
984{
985 struct scsi_cd *cd = container_of(kref, struct scsi_cd, kref);
986 struct gendisk *disk = cd->disk;
987
988 spin_lock(&sr_index_lock);
989 clear_bit(MINOR(disk_devt(disk)), sr_index_bits);
990 spin_unlock(&sr_index_lock);
991
992 unregister_cdrom(&cd->cdi);
993
994 disk->private_data = NULL;
995
996 put_disk(disk);
997
998 kfree(cd);
999}
1000
1001static int sr_remove(struct device *dev)
1002{
1003 struct scsi_cd *cd = dev_get_drvdata(dev);
1004
1005 scsi_autopm_get_device(cd->device);
1006
1007 blk_queue_prep_rq(cd->device->request_queue, scsi_prep_fn);
1008 del_gendisk(cd->disk);
1009
1010 mutex_lock(&sr_ref_mutex);
1011 kref_put(&cd->kref, sr_kref_release);
1012 mutex_unlock(&sr_ref_mutex);
1013
1014 return 0;
1015}
1016
1017static int __init init_sr(void)
1018{
1019 int rc;
1020
1021 rc = register_blkdev(SCSI_CDROM_MAJOR, "sr");
1022 if (rc)
1023 return rc;
1024 rc = scsi_register_driver(&sr_template.gendrv);
1025 if (rc)
1026 unregister_blkdev(SCSI_CDROM_MAJOR, "sr");
1027
1028 return rc;
1029}
1030
1031static void __exit exit_sr(void)
1032{
1033 scsi_unregister_driver(&sr_template.gendrv);
1034 unregister_blkdev(SCSI_CDROM_MAJOR, "sr");
1035}
1036
1037module_init(init_sr);
1038module_exit(exit_sr);
1039MODULE_LICENSE("GPL");
1040