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36#include <linux/module.h>
37#include <linux/fs.h>
38#include <linux/kernel.h>
39#include <linux/mm.h>
40#include <linux/bio.h>
41#include <linux/compat.h>
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>
47#include <linux/blkdev.h>
48#include <linux/blk-pm.h>
49#include <linux/mutex.h>
50#include <linux/slab.h>
51#include <linux/pm_runtime.h>
52#include <linux/uaccess.h>
53
54#include <asm/unaligned.h>
55
56#include <scsi/scsi.h>
57#include <scsi/scsi_dbg.h>
58#include <scsi/scsi_device.h>
59#include <scsi/scsi_driver.h>
60#include <scsi/scsi_cmnd.h>
61#include <scsi/scsi_eh.h>
62#include <scsi/scsi_host.h>
63#include <scsi/scsi_ioctl.h>
64
65#include "scsi_logging.h"
66#include "sr.h"
67
68
69MODULE_DESCRIPTION("SCSI cdrom (sr) driver");
70MODULE_LICENSE("GPL");
71MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_CDROM_MAJOR);
72MODULE_ALIAS_SCSI_DEVICE(TYPE_ROM);
73MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM);
74
75#define SR_DISKS 256
76
77#define SR_CAPABILITIES \
78 (CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|CDC_SELECT_SPEED| \
79 CDC_SELECT_DISC|CDC_MULTI_SESSION|CDC_MCN|CDC_MEDIA_CHANGED| \
80 CDC_PLAY_AUDIO|CDC_RESET|CDC_DRIVE_STATUS| \
81 CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_DVD_RAM|CDC_GENERIC_PACKET| \
82 CDC_MRW|CDC_MRW_W|CDC_RAM)
83
84static int sr_probe(struct device *);
85static int sr_remove(struct device *);
86static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt);
87static int sr_done(struct scsi_cmnd *);
88static int sr_runtime_suspend(struct device *dev);
89
90static const struct dev_pm_ops sr_pm_ops = {
91 .runtime_suspend = sr_runtime_suspend,
92};
93
94static struct scsi_driver sr_template = {
95 .gendrv = {
96 .name = "sr",
97 .owner = THIS_MODULE,
98 .probe = sr_probe,
99 .remove = sr_remove,
100 .pm = &sr_pm_ops,
101 },
102 .init_command = sr_init_command,
103 .done = sr_done,
104};
105
106static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
107static DEFINE_SPINLOCK(sr_index_lock);
108
109
110
111
112static DEFINE_MUTEX(sr_ref_mutex);
113
114static int sr_open(struct cdrom_device_info *, int);
115static void sr_release(struct cdrom_device_info *);
116
117static void get_sectorsize(struct scsi_cd *);
118static void get_capabilities(struct scsi_cd *);
119
120static unsigned int sr_check_events(struct cdrom_device_info *cdi,
121 unsigned int clearing, int slot);
122static int sr_packet(struct cdrom_device_info *, struct packet_command *);
123
124static const struct cdrom_device_ops sr_dops = {
125 .open = sr_open,
126 .release = sr_release,
127 .drive_status = sr_drive_status,
128 .check_events = sr_check_events,
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,
136 .capability = SR_CAPABILITIES,
137 .generic_packet = sr_packet,
138};
139
140static void sr_kref_release(struct kref *kref);
141
142static inline struct scsi_cd *scsi_cd(struct gendisk *disk)
143{
144 return container_of(disk->private_data, struct scsi_cd, driver);
145}
146
147static int sr_runtime_suspend(struct device *dev)
148{
149 struct scsi_cd *cd = dev_get_drvdata(dev);
150
151 if (!cd)
152 return 0;
153
154 if (cd->media_present)
155 return -EBUSY;
156 else
157 return 0;
158}
159
160
161
162
163
164static inline struct scsi_cd *scsi_cd_get(struct gendisk *disk)
165{
166 struct scsi_cd *cd = NULL;
167
168 mutex_lock(&sr_ref_mutex);
169 if (disk->private_data == NULL)
170 goto out;
171 cd = scsi_cd(disk);
172 kref_get(&cd->kref);
173 if (scsi_device_get(cd->device)) {
174 kref_put(&cd->kref, sr_kref_release);
175 cd = NULL;
176 }
177 out:
178 mutex_unlock(&sr_ref_mutex);
179 return cd;
180}
181
182static void scsi_cd_put(struct scsi_cd *cd)
183{
184 struct scsi_device *sdev = cd->device;
185
186 mutex_lock(&sr_ref_mutex);
187 kref_put(&cd->kref, sr_kref_release);
188 scsi_device_put(sdev);
189 mutex_unlock(&sr_ref_mutex);
190}
191
192static unsigned int sr_get_events(struct scsi_device *sdev)
193{
194 u8 buf[8];
195 u8 cmd[] = { GET_EVENT_STATUS_NOTIFICATION,
196 1,
197 0, 0,
198 1 << 4,
199 0, 0,
200 0, sizeof(buf),
201 0,
202 };
203 struct event_header *eh = (void *)buf;
204 struct media_event_desc *med = (void *)(buf + 4);
205 struct scsi_sense_hdr sshdr;
206 int result;
207
208 result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, sizeof(buf),
209 &sshdr, SR_TIMEOUT, MAX_RETRIES, NULL);
210 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == UNIT_ATTENTION)
211 return DISK_EVENT_MEDIA_CHANGE;
212
213 if (result || be16_to_cpu(eh->data_len) < sizeof(*med))
214 return 0;
215
216 if (eh->nea || eh->notification_class != 0x4)
217 return 0;
218
219 if (med->media_event_code == 1)
220 return DISK_EVENT_EJECT_REQUEST;
221 else if (med->media_event_code == 2)
222 return DISK_EVENT_MEDIA_CHANGE;
223 return 0;
224}
225
226
227
228
229
230
231
232
233static unsigned int sr_check_events(struct cdrom_device_info *cdi,
234 unsigned int clearing, int slot)
235{
236 struct scsi_cd *cd = cdi->handle;
237 bool last_present;
238 struct scsi_sense_hdr sshdr;
239 unsigned int events;
240 int ret;
241
242
243 if (CDSL_CURRENT != slot)
244 return 0;
245
246 events = sr_get_events(cd->device);
247 cd->get_event_changed |= events & DISK_EVENT_MEDIA_CHANGE;
248
249
250
251
252
253
254
255 if (cd->ignore_get_event) {
256 events &= ~DISK_EVENT_MEDIA_CHANGE;
257 goto do_tur;
258 }
259
260
261
262
263
264
265 if (cd->device->changed) {
266 events |= DISK_EVENT_MEDIA_CHANGE;
267 cd->device->changed = 0;
268 cd->tur_changed = true;
269 }
270
271 if (!(clearing & DISK_EVENT_MEDIA_CHANGE))
272 return events;
273do_tur:
274
275 last_present = cd->media_present;
276 ret = scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr);
277
278
279
280
281
282
283 cd->media_present = scsi_status_is_good(ret) ||
284 (scsi_sense_valid(&sshdr) && sshdr.asc != 0x3a);
285
286 if (last_present != cd->media_present)
287 cd->device->changed = 1;
288
289 if (cd->device->changed) {
290 events |= DISK_EVENT_MEDIA_CHANGE;
291 cd->device->changed = 0;
292 cd->tur_changed = true;
293 }
294
295 if (cd->ignore_get_event)
296 return events;
297
298
299 if (!cd->tur_changed) {
300 if (cd->get_event_changed) {
301 if (cd->tur_mismatch++ > 8) {
302 sr_printk(KERN_WARNING, cd,
303 "GET_EVENT and TUR disagree continuously, suppress GET_EVENT events\n");
304 cd->ignore_get_event = true;
305 }
306 } else {
307 cd->tur_mismatch = 0;
308 }
309 }
310 cd->tur_changed = false;
311 cd->get_event_changed = false;
312
313 return events;
314}
315
316
317
318
319
320
321
322static int sr_done(struct scsi_cmnd *SCpnt)
323{
324 int result = SCpnt->result;
325 int this_count = scsi_bufflen(SCpnt);
326 int good_bytes = (result == 0 ? this_count : 0);
327 int block_sectors = 0;
328 long error_sector;
329 struct scsi_cd *cd = scsi_cd(SCpnt->request->rq_disk);
330
331#ifdef DEBUG
332 scmd_printk(KERN_INFO, SCpnt, "done: %x\n", result);
333#endif
334
335
336
337
338
339
340
341 if (driver_byte(result) != 0 &&
342 (SCpnt->sense_buffer[0] & 0x7f) == 0x70) {
343 switch (SCpnt->sense_buffer[2]) {
344 case MEDIUM_ERROR:
345 case VOLUME_OVERFLOW:
346 case ILLEGAL_REQUEST:
347 if (!(SCpnt->sense_buffer[0] & 0x90))
348 break;
349 error_sector =
350 get_unaligned_be32(&SCpnt->sense_buffer[3]);
351 if (SCpnt->request->bio != NULL)
352 block_sectors =
353 bio_sectors(SCpnt->request->bio);
354 if (block_sectors < 4)
355 block_sectors = 4;
356 if (cd->device->sector_size == 2048)
357 error_sector <<= 2;
358 error_sector &= ~(block_sectors - 1);
359 good_bytes = (error_sector -
360 blk_rq_pos(SCpnt->request)) << 9;
361 if (good_bytes < 0 || good_bytes >= this_count)
362 good_bytes = 0;
363
364
365
366
367
368
369
370
371 if (error_sector < get_capacity(cd->disk) &&
372 cd->capacity - error_sector < 4 * 75)
373 set_capacity(cd->disk, error_sector);
374 break;
375
376 case RECOVERED_ERROR:
377 good_bytes = this_count;
378 break;
379
380 default:
381 break;
382 }
383 }
384
385 return good_bytes;
386}
387
388static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt)
389{
390 int block = 0, this_count, s_size;
391 struct scsi_cd *cd;
392 struct request *rq = SCpnt->request;
393 blk_status_t ret;
394
395 ret = scsi_init_io(SCpnt);
396 if (ret != BLK_STS_OK)
397 goto out;
398 cd = scsi_cd(rq->rq_disk);
399
400
401
402 ret = BLK_STS_IOERR;
403
404 SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt,
405 "Doing sr request, block = %d\n", block));
406
407 if (!cd->device || !scsi_device_online(cd->device)) {
408 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
409 "Finishing %u sectors\n", blk_rq_sectors(rq)));
410 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
411 "Retry with 0x%p\n", SCpnt));
412 goto out;
413 }
414
415 if (cd->device->changed) {
416
417
418
419
420 goto out;
421 }
422
423
424
425
426
427 s_size = cd->device->sector_size;
428 if (s_size > 2048) {
429 if (!in_interrupt())
430 sr_set_blocklength(cd, 2048);
431 else
432 scmd_printk(KERN_INFO, SCpnt,
433 "can't switch blocksize: in interrupt\n");
434 }
435
436 if (s_size != 512 && s_size != 1024 && s_size != 2048) {
437 scmd_printk(KERN_ERR, SCpnt, "bad sector size %d\n", s_size);
438 goto out;
439 }
440
441 switch (req_op(rq)) {
442 case REQ_OP_WRITE:
443 if (!cd->writeable)
444 goto out;
445 SCpnt->cmnd[0] = WRITE_10;
446 cd->cdi.media_written = 1;
447 break;
448 case REQ_OP_READ:
449 SCpnt->cmnd[0] = READ_10;
450 break;
451 default:
452 blk_dump_rq_flags(rq, "Unknown sr command");
453 goto out;
454 }
455
456 {
457 struct scatterlist *sg;
458 int i, size = 0, sg_count = scsi_sg_count(SCpnt);
459
460 scsi_for_each_sg(SCpnt, sg, sg_count, i)
461 size += sg->length;
462
463 if (size != scsi_bufflen(SCpnt)) {
464 scmd_printk(KERN_ERR, SCpnt,
465 "mismatch count %d, bytes %d\n",
466 size, scsi_bufflen(SCpnt));
467 if (scsi_bufflen(SCpnt) > size)
468 SCpnt->sdb.length = size;
469 }
470 }
471
472
473
474
475 if (((unsigned int)blk_rq_pos(rq) % (s_size >> 9)) ||
476 (scsi_bufflen(SCpnt) % s_size)) {
477 scmd_printk(KERN_NOTICE, SCpnt, "unaligned transfer\n");
478 goto out;
479 }
480
481 this_count = (scsi_bufflen(SCpnt) >> 9) / (s_size >> 9);
482
483
484 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
485 "%s %d/%u 512 byte blocks.\n",
486 (rq_data_dir(rq) == WRITE) ?
487 "writing" : "reading",
488 this_count, blk_rq_sectors(rq)));
489
490 SCpnt->cmnd[1] = 0;
491 block = (unsigned int)blk_rq_pos(rq) / (s_size >> 9);
492
493 if (this_count > 0xffff) {
494 this_count = 0xffff;
495 SCpnt->sdb.length = this_count * s_size;
496 }
497
498 put_unaligned_be32(block, &SCpnt->cmnd[2]);
499 SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0;
500 put_unaligned_be16(this_count, &SCpnt->cmnd[7]);
501
502
503
504
505
506
507 SCpnt->transfersize = cd->device->sector_size;
508 SCpnt->underflow = this_count << 9;
509 SCpnt->allowed = MAX_RETRIES;
510
511
512
513
514
515 ret = BLK_STS_OK;
516 out:
517 return ret;
518}
519
520static int sr_block_open(struct block_device *bdev, fmode_t mode)
521{
522 struct scsi_cd *cd;
523 struct scsi_device *sdev;
524 int ret = -ENXIO;
525
526 cd = scsi_cd_get(bdev->bd_disk);
527 if (!cd)
528 goto out;
529
530 sdev = cd->device;
531 scsi_autopm_get_device(sdev);
532 check_disk_change(bdev);
533
534 mutex_lock(&cd->lock);
535 ret = cdrom_open(&cd->cdi, bdev, mode);
536 mutex_unlock(&cd->lock);
537
538 scsi_autopm_put_device(sdev);
539 if (ret)
540 scsi_cd_put(cd);
541
542out:
543 return ret;
544}
545
546static void sr_block_release(struct gendisk *disk, fmode_t mode)
547{
548 struct scsi_cd *cd = scsi_cd(disk);
549
550 mutex_lock(&cd->lock);
551 cdrom_release(&cd->cdi, mode);
552 mutex_unlock(&cd->lock);
553
554 scsi_cd_put(cd);
555}
556
557static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
558 unsigned long arg)
559{
560 struct scsi_cd *cd = scsi_cd(bdev->bd_disk);
561 struct scsi_device *sdev = cd->device;
562 void __user *argp = (void __user *)arg;
563 int ret;
564
565 mutex_lock(&cd->lock);
566
567 ret = scsi_ioctl_block_when_processing_errors(sdev, cmd,
568 (mode & FMODE_NDELAY) != 0);
569 if (ret)
570 goto out;
571
572 scsi_autopm_get_device(sdev);
573
574
575
576
577
578 switch (cmd) {
579 case SCSI_IOCTL_GET_IDLUN:
580 case SCSI_IOCTL_GET_BUS_NUMBER:
581 ret = scsi_ioctl(sdev, cmd, argp);
582 goto put;
583 }
584
585 ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
586 if (ret != -ENOSYS)
587 goto put;
588
589 ret = scsi_ioctl(sdev, cmd, argp);
590
591put:
592 scsi_autopm_put_device(sdev);
593
594out:
595 mutex_unlock(&cd->lock);
596 return ret;
597}
598
599#ifdef CONFIG_COMPAT
600static int sr_block_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
601 unsigned long arg)
602{
603 struct scsi_cd *cd = scsi_cd(bdev->bd_disk);
604 struct scsi_device *sdev = cd->device;
605 void __user *argp = compat_ptr(arg);
606 int ret;
607
608 mutex_lock(&cd->lock);
609
610 ret = scsi_ioctl_block_when_processing_errors(sdev, cmd,
611 (mode & FMODE_NDELAY) != 0);
612 if (ret)
613 goto out;
614
615 scsi_autopm_get_device(sdev);
616
617
618
619
620
621 switch (cmd) {
622 case SCSI_IOCTL_GET_IDLUN:
623 case SCSI_IOCTL_GET_BUS_NUMBER:
624 ret = scsi_compat_ioctl(sdev, cmd, argp);
625 goto put;
626 }
627
628 ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, (unsigned long)argp);
629 if (ret != -ENOSYS)
630 goto put;
631
632 ret = scsi_compat_ioctl(sdev, cmd, argp);
633
634put:
635 scsi_autopm_put_device(sdev);
636
637out:
638 mutex_unlock(&cd->lock);
639 return ret;
640
641}
642#endif
643
644static unsigned int sr_block_check_events(struct gendisk *disk,
645 unsigned int clearing)
646{
647 unsigned int ret = 0;
648 struct scsi_cd *cd;
649
650 cd = scsi_cd_get(disk);
651 if (!cd)
652 return 0;
653
654 if (!atomic_read(&cd->device->disk_events_disable_depth))
655 ret = cdrom_check_events(&cd->cdi, clearing);
656
657 scsi_cd_put(cd);
658 return ret;
659}
660
661static int sr_block_revalidate_disk(struct gendisk *disk)
662{
663 struct scsi_sense_hdr sshdr;
664 struct scsi_cd *cd;
665
666 cd = scsi_cd_get(disk);
667 if (!cd)
668 return -ENXIO;
669
670
671 if (scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
672 goto out;
673
674 sr_cd_check(&cd->cdi);
675 get_sectorsize(cd);
676out:
677 scsi_cd_put(cd);
678 return 0;
679}
680
681static const struct block_device_operations sr_bdops =
682{
683 .owner = THIS_MODULE,
684 .open = sr_block_open,
685 .release = sr_block_release,
686 .ioctl = sr_block_ioctl,
687#ifdef CONFIG_COMPAT
688 .compat_ioctl = sr_block_compat_ioctl,
689#endif
690 .check_events = sr_block_check_events,
691 .revalidate_disk = sr_block_revalidate_disk,
692};
693
694static int sr_open(struct cdrom_device_info *cdi, int purpose)
695{
696 struct scsi_cd *cd = cdi->handle;
697 struct scsi_device *sdev = cd->device;
698 int retval;
699
700
701
702
703
704 retval = -ENXIO;
705 if (!scsi_block_when_processing_errors(sdev))
706 goto error_out;
707
708 return 0;
709
710error_out:
711 return retval;
712}
713
714static void sr_release(struct cdrom_device_info *cdi)
715{
716 struct scsi_cd *cd = cdi->handle;
717
718 if (cd->device->sector_size > 2048)
719 sr_set_blocklength(cd, 2048);
720
721}
722
723static int sr_probe(struct device *dev)
724{
725 struct scsi_device *sdev = to_scsi_device(dev);
726 struct gendisk *disk;
727 struct scsi_cd *cd;
728 int minor, error;
729
730 scsi_autopm_get_device(sdev);
731 error = -ENODEV;
732 if (sdev->type != TYPE_ROM && sdev->type != TYPE_WORM)
733 goto fail;
734
735 error = -ENOMEM;
736 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
737 if (!cd)
738 goto fail;
739
740 kref_init(&cd->kref);
741
742 disk = alloc_disk(1);
743 if (!disk)
744 goto fail_free;
745 mutex_init(&cd->lock);
746
747 spin_lock(&sr_index_lock);
748 minor = find_first_zero_bit(sr_index_bits, SR_DISKS);
749 if (minor == SR_DISKS) {
750 spin_unlock(&sr_index_lock);
751 error = -EBUSY;
752 goto fail_put;
753 }
754 __set_bit(minor, sr_index_bits);
755 spin_unlock(&sr_index_lock);
756
757 disk->major = SCSI_CDROM_MAJOR;
758 disk->first_minor = minor;
759 sprintf(disk->disk_name, "sr%d", minor);
760 disk->fops = &sr_bdops;
761 disk->flags = GENHD_FL_CD | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
762 disk->events = DISK_EVENT_MEDIA_CHANGE | DISK_EVENT_EJECT_REQUEST;
763 disk->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
764
765 blk_queue_rq_timeout(sdev->request_queue, SR_TIMEOUT);
766
767 cd->device = sdev;
768 cd->disk = disk;
769 cd->driver = &sr_template;
770 cd->disk = disk;
771 cd->capacity = 0x1fffff;
772 cd->device->changed = 1;
773 cd->media_present = 1;
774 cd->use = 1;
775 cd->readcd_known = 0;
776 cd->readcd_cdda = 0;
777
778 cd->cdi.ops = &sr_dops;
779 cd->cdi.handle = cd;
780 cd->cdi.mask = 0;
781 cd->cdi.capacity = 1;
782 sprintf(cd->cdi.name, "sr%d", minor);
783
784 sdev->sector_size = 2048;
785
786
787 get_capabilities(cd);
788 sr_vendor_init(cd);
789
790 set_capacity(disk, cd->capacity);
791 disk->private_data = &cd->driver;
792 disk->queue = sdev->request_queue;
793
794 if (register_cdrom(disk, &cd->cdi))
795 goto fail_minor;
796
797
798
799
800
801 blk_pm_runtime_init(sdev->request_queue, dev);
802
803 dev_set_drvdata(dev, cd);
804 disk->flags |= GENHD_FL_REMOVABLE;
805 device_add_disk(&sdev->sdev_gendev, disk, NULL);
806
807 sdev_printk(KERN_DEBUG, sdev,
808 "Attached scsi CD-ROM %s\n", cd->cdi.name);
809 scsi_autopm_put_device(cd->device);
810
811 return 0;
812
813fail_minor:
814 spin_lock(&sr_index_lock);
815 clear_bit(minor, sr_index_bits);
816 spin_unlock(&sr_index_lock);
817fail_put:
818 put_disk(disk);
819 mutex_destroy(&cd->lock);
820fail_free:
821 kfree(cd);
822fail:
823 scsi_autopm_put_device(sdev);
824 return error;
825}
826
827
828static void get_sectorsize(struct scsi_cd *cd)
829{
830 unsigned char cmd[10];
831 unsigned char buffer[8];
832 int the_result, retries = 3;
833 int sector_size;
834 struct request_queue *queue;
835
836 do {
837 cmd[0] = READ_CAPACITY;
838 memset((void *) &cmd[1], 0, 9);
839 memset(buffer, 0, sizeof(buffer));
840
841
842 the_result = scsi_execute_req(cd->device, cmd, DMA_FROM_DEVICE,
843 buffer, sizeof(buffer), NULL,
844 SR_TIMEOUT, MAX_RETRIES, NULL);
845
846 retries--;
847
848 } while (the_result && retries);
849
850
851 if (the_result) {
852 cd->capacity = 0x1fffff;
853 sector_size = 2048;
854 } else {
855 long last_written;
856
857 cd->capacity = 1 + get_unaligned_be32(&buffer[0]);
858
859
860
861
862
863
864
865 if (!cdrom_get_last_written(&cd->cdi, &last_written))
866 cd->capacity = max_t(long, cd->capacity, last_written);
867
868 sector_size = get_unaligned_be32(&buffer[4]);
869 switch (sector_size) {
870
871
872
873
874
875
876 case 0:
877 case 2340:
878 case 2352:
879 sector_size = 2048;
880
881 case 2048:
882 cd->capacity *= 4;
883
884 case 512:
885 break;
886 default:
887 sr_printk(KERN_INFO, cd,
888 "unsupported sector size %d.", sector_size);
889 cd->capacity = 0;
890 }
891
892 cd->device->sector_size = sector_size;
893
894
895
896
897
898 set_capacity(cd->disk, cd->capacity);
899 }
900
901 queue = cd->device->request_queue;
902 blk_queue_logical_block_size(queue, sector_size);
903
904 return;
905}
906
907static void get_capabilities(struct scsi_cd *cd)
908{
909 unsigned char *buffer;
910 struct scsi_mode_data data;
911 struct scsi_sense_hdr sshdr;
912 unsigned int ms_len = 128;
913 int rc, n;
914
915 static const char *loadmech[] =
916 {
917 "caddy",
918 "tray",
919 "pop-up",
920 "",
921 "changer",
922 "cartridge changer",
923 "",
924 ""
925 };
926
927
928
929 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
930 if (!buffer) {
931 sr_printk(KERN_ERR, cd, "out of memory.\n");
932 return;
933 }
934
935
936 scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr);
937
938
939 rc = scsi_mode_sense(cd->device, 0, 0x2a, buffer, ms_len,
940 SR_TIMEOUT, 3, &data, NULL);
941
942 if (!scsi_status_is_good(rc) || data.length > ms_len ||
943 data.header_length + data.block_descriptor_length > data.length) {
944
945 cd->cdi.speed = 1;
946 cd->cdi.mask |= (CDC_CD_R | CDC_CD_RW | CDC_DVD_R |
947 CDC_DVD | CDC_DVD_RAM |
948 CDC_SELECT_DISC | CDC_SELECT_SPEED |
949 CDC_MRW | CDC_MRW_W | CDC_RAM);
950 kfree(buffer);
951 sr_printk(KERN_INFO, cd, "scsi-1 drive");
952 return;
953 }
954
955 n = data.header_length + data.block_descriptor_length;
956 cd->cdi.speed = get_unaligned_be16(&buffer[n + 8]) / 176;
957 cd->readcd_known = 1;
958 cd->readcd_cdda = buffer[n + 5] & 0x01;
959
960 sr_printk(KERN_INFO, cd,
961 "scsi3-mmc drive: %dx/%dx %s%s%s%s%s%s\n",
962 get_unaligned_be16(&buffer[n + 14]) / 176,
963 cd->cdi.speed,
964 buffer[n + 3] & 0x01 ? "writer " : "",
965 buffer[n + 3] & 0x20 ? "dvd-ram " : "",
966 buffer[n + 2] & 0x02 ? "cd/rw " : "",
967 buffer[n + 4] & 0x20 ? "xa/form2 " : "",
968 buffer[n + 5] & 0x01 ? "cdda " : "",
969 loadmech[buffer[n + 6] >> 5]);
970 if ((buffer[n + 6] >> 5) == 0)
971
972 cd->cdi.mask |= CDC_CLOSE_TRAY;
973 if ((buffer[n + 2] & 0x8) == 0)
974
975 cd->cdi.mask |= CDC_DVD;
976 if ((buffer[n + 3] & 0x20) == 0)
977
978 cd->cdi.mask |= CDC_DVD_RAM;
979 if ((buffer[n + 3] & 0x10) == 0)
980
981 cd->cdi.mask |= CDC_DVD_R;
982 if ((buffer[n + 3] & 0x2) == 0)
983
984 cd->cdi.mask |= CDC_CD_RW;
985 if ((buffer[n + 3] & 0x1) == 0)
986
987 cd->cdi.mask |= CDC_CD_R;
988 if ((buffer[n + 6] & 0x8) == 0)
989
990 cd->cdi.mask |= CDC_OPEN_TRAY;
991
992 if ((buffer[n + 6] >> 5) == mechtype_individual_changer ||
993 (buffer[n + 6] >> 5) == mechtype_cartridge_changer)
994 cd->cdi.capacity =
995 cdrom_number_of_slots(&cd->cdi);
996 if (cd->cdi.capacity <= 1)
997
998 cd->cdi.mask |= CDC_SELECT_DISC;
999
1000
1001
1002
1003
1004
1005 if ((cd->cdi.mask & (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) !=
1006 (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) {
1007 cd->writeable = 1;
1008 }
1009
1010 kfree(buffer);
1011}
1012
1013
1014
1015
1016
1017static int sr_packet(struct cdrom_device_info *cdi,
1018 struct packet_command *cgc)
1019{
1020 struct scsi_cd *cd = cdi->handle;
1021 struct scsi_device *sdev = cd->device;
1022
1023 if (cgc->cmd[0] == GPCMD_READ_DISC_INFO && sdev->no_read_disc_info)
1024 return -EDRIVE_CANT_DO_THIS;
1025
1026 if (cgc->timeout <= 0)
1027 cgc->timeout = IOCTL_TIMEOUT;
1028
1029 sr_do_ioctl(cd, cgc);
1030
1031 return cgc->stat;
1032}
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043static void sr_kref_release(struct kref *kref)
1044{
1045 struct scsi_cd *cd = container_of(kref, struct scsi_cd, kref);
1046 struct gendisk *disk = cd->disk;
1047
1048 spin_lock(&sr_index_lock);
1049 clear_bit(MINOR(disk_devt(disk)), sr_index_bits);
1050 spin_unlock(&sr_index_lock);
1051
1052 unregister_cdrom(&cd->cdi);
1053
1054 disk->private_data = NULL;
1055
1056 put_disk(disk);
1057
1058 mutex_destroy(&cd->lock);
1059
1060 kfree(cd);
1061}
1062
1063static int sr_remove(struct device *dev)
1064{
1065 struct scsi_cd *cd = dev_get_drvdata(dev);
1066
1067 scsi_autopm_get_device(cd->device);
1068
1069 del_gendisk(cd->disk);
1070 dev_set_drvdata(dev, NULL);
1071
1072 mutex_lock(&sr_ref_mutex);
1073 kref_put(&cd->kref, sr_kref_release);
1074 mutex_unlock(&sr_ref_mutex);
1075
1076 return 0;
1077}
1078
1079static int __init init_sr(void)
1080{
1081 int rc;
1082
1083 rc = register_blkdev(SCSI_CDROM_MAJOR, "sr");
1084 if (rc)
1085 return rc;
1086 rc = scsi_register_driver(&sr_template.gendrv);
1087 if (rc)
1088 unregister_blkdev(SCSI_CDROM_MAJOR, "sr");
1089
1090 return rc;
1091}
1092
1093static void __exit exit_sr(void)
1094{
1095 scsi_unregister_driver(&sr_template.gendrv);
1096 unregister_blkdev(SCSI_CDROM_MAJOR, "sr");
1097}
1098
1099module_init(init_sr);
1100module_exit(exit_sr);
1101MODULE_LICENSE("GPL");
1102