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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/genhd.h>
41#include <linux/hdreg.h>
42#include <linux/errno.h>
43#include <linux/idr.h>
44#include <linux/interrupt.h>
45#include <linux/init.h>
46#include <linux/blkdev.h>
47#include <linux/blkpg.h>
48#include <linux/delay.h>
49#include <linux/mutex.h>
50#include <linux/string_helpers.h>
51#include <linux/async.h>
52#include <asm/uaccess.h>
53#include <asm/unaligned.h>
54
55#include <scsi/scsi.h>
56#include <scsi/scsi_cmnd.h>
57#include <scsi/scsi_dbg.h>
58#include <scsi/scsi_device.h>
59#include <scsi/scsi_driver.h>
60#include <scsi/scsi_eh.h>
61#include <scsi/scsi_host.h>
62#include <scsi/scsi_ioctl.h>
63#include <scsi/scsicam.h>
64
65#include "sd.h"
66#include "scsi_logging.h"
67
68MODULE_AUTHOR("Eric Youngdale");
69MODULE_DESCRIPTION("SCSI disk (sd) driver");
70MODULE_LICENSE("GPL");
71
72MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
73MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
74MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
75MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
76MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
77MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
78MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
79MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
80MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
81MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
82MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
83MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
84MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
85MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
86MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
87MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
88MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
89MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
90MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
91
92#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
93#define SD_MINORS 16
94#else
95#define SD_MINORS 0
96#endif
97
98static int sd_revalidate_disk(struct gendisk *);
99static int sd_probe(struct device *);
100static int sd_remove(struct device *);
101static void sd_shutdown(struct device *);
102static int sd_suspend(struct device *, pm_message_t state);
103static int sd_resume(struct device *);
104static void sd_rescan(struct device *);
105static int sd_done(struct scsi_cmnd *);
106static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
107static void scsi_disk_release(struct device *cdev);
108static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
109static void sd_print_result(struct scsi_disk *, int);
110
111static DEFINE_SPINLOCK(sd_index_lock);
112static DEFINE_IDA(sd_index_ida);
113
114
115
116
117static DEFINE_MUTEX(sd_ref_mutex);
118
119struct kmem_cache *sd_cdb_cache;
120mempool_t *sd_cdb_pool;
121
122static const char *sd_cache_types[] = {
123 "write through", "none", "write back",
124 "write back, no read (daft)"
125};
126
127static ssize_t
128sd_store_cache_type(struct device *dev, struct device_attribute *attr,
129 const char *buf, size_t count)
130{
131 int i, ct = -1, rcd, wce, sp;
132 struct scsi_disk *sdkp = to_scsi_disk(dev);
133 struct scsi_device *sdp = sdkp->device;
134 char buffer[64];
135 char *buffer_data;
136 struct scsi_mode_data data;
137 struct scsi_sense_hdr sshdr;
138 int len;
139
140 if (sdp->type != TYPE_DISK)
141
142
143
144 return -EINVAL;
145
146 for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) {
147 const int len = strlen(sd_cache_types[i]);
148 if (strncmp(sd_cache_types[i], buf, len) == 0 &&
149 buf[len] == '\n') {
150 ct = i;
151 break;
152 }
153 }
154 if (ct < 0)
155 return -EINVAL;
156 rcd = ct & 0x01 ? 1 : 0;
157 wce = ct & 0x02 ? 1 : 0;
158 if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
159 SD_MAX_RETRIES, &data, NULL))
160 return -EINVAL;
161 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
162 data.block_descriptor_length);
163 buffer_data = buffer + data.header_length +
164 data.block_descriptor_length;
165 buffer_data[2] &= ~0x05;
166 buffer_data[2] |= wce << 2 | rcd;
167 sp = buffer_data[0] & 0x80 ? 1 : 0;
168
169 if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
170 SD_MAX_RETRIES, &data, &sshdr)) {
171 if (scsi_sense_valid(&sshdr))
172 sd_print_sense_hdr(sdkp, &sshdr);
173 return -EINVAL;
174 }
175 revalidate_disk(sdkp->disk);
176 return count;
177}
178
179static ssize_t
180sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr,
181 const char *buf, size_t count)
182{
183 struct scsi_disk *sdkp = to_scsi_disk(dev);
184 struct scsi_device *sdp = sdkp->device;
185
186 if (!capable(CAP_SYS_ADMIN))
187 return -EACCES;
188
189 sdp->manage_start_stop = simple_strtoul(buf, NULL, 10);
190
191 return count;
192}
193
194static ssize_t
195sd_store_allow_restart(struct device *dev, struct device_attribute *attr,
196 const char *buf, size_t count)
197{
198 struct scsi_disk *sdkp = to_scsi_disk(dev);
199 struct scsi_device *sdp = sdkp->device;
200
201 if (!capable(CAP_SYS_ADMIN))
202 return -EACCES;
203
204 if (sdp->type != TYPE_DISK)
205 return -EINVAL;
206
207 sdp->allow_restart = simple_strtoul(buf, NULL, 10);
208
209 return count;
210}
211
212static ssize_t
213sd_show_cache_type(struct device *dev, struct device_attribute *attr,
214 char *buf)
215{
216 struct scsi_disk *sdkp = to_scsi_disk(dev);
217 int ct = sdkp->RCD + 2*sdkp->WCE;
218
219 return snprintf(buf, 40, "%s\n", sd_cache_types[ct]);
220}
221
222static ssize_t
223sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf)
224{
225 struct scsi_disk *sdkp = to_scsi_disk(dev);
226
227 return snprintf(buf, 20, "%u\n", sdkp->DPOFUA);
228}
229
230static ssize_t
231sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr,
232 char *buf)
233{
234 struct scsi_disk *sdkp = to_scsi_disk(dev);
235 struct scsi_device *sdp = sdkp->device;
236
237 return snprintf(buf, 20, "%u\n", sdp->manage_start_stop);
238}
239
240static ssize_t
241sd_show_allow_restart(struct device *dev, struct device_attribute *attr,
242 char *buf)
243{
244 struct scsi_disk *sdkp = to_scsi_disk(dev);
245
246 return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart);
247}
248
249static ssize_t
250sd_show_protection_type(struct device *dev, struct device_attribute *attr,
251 char *buf)
252{
253 struct scsi_disk *sdkp = to_scsi_disk(dev);
254
255 return snprintf(buf, 20, "%u\n", sdkp->protection_type);
256}
257
258static ssize_t
259sd_show_app_tag_own(struct device *dev, struct device_attribute *attr,
260 char *buf)
261{
262 struct scsi_disk *sdkp = to_scsi_disk(dev);
263
264 return snprintf(buf, 20, "%u\n", sdkp->ATO);
265}
266
267static struct device_attribute sd_disk_attrs[] = {
268 __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type,
269 sd_store_cache_type),
270 __ATTR(FUA, S_IRUGO, sd_show_fua, NULL),
271 __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart,
272 sd_store_allow_restart),
273 __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop,
274 sd_store_manage_start_stop),
275 __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL),
276 __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL),
277 __ATTR_NULL,
278};
279
280static struct class sd_disk_class = {
281 .name = "scsi_disk",
282 .owner = THIS_MODULE,
283 .dev_release = scsi_disk_release,
284 .dev_attrs = sd_disk_attrs,
285};
286
287static struct scsi_driver sd_template = {
288 .owner = THIS_MODULE,
289 .gendrv = {
290 .name = "sd",
291 .probe = sd_probe,
292 .remove = sd_remove,
293 .suspend = sd_suspend,
294 .resume = sd_resume,
295 .shutdown = sd_shutdown,
296 },
297 .rescan = sd_rescan,
298 .done = sd_done,
299};
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315static int sd_major(int major_idx)
316{
317 switch (major_idx) {
318 case 0:
319 return SCSI_DISK0_MAJOR;
320 case 1 ... 7:
321 return SCSI_DISK1_MAJOR + major_idx - 1;
322 case 8 ... 15:
323 return SCSI_DISK8_MAJOR + major_idx - 8;
324 default:
325 BUG();
326 return 0;
327 }
328}
329
330static struct scsi_disk *__scsi_disk_get(struct gendisk *disk)
331{
332 struct scsi_disk *sdkp = NULL;
333
334 if (disk->private_data) {
335 sdkp = scsi_disk(disk);
336 if (scsi_device_get(sdkp->device) == 0)
337 get_device(&sdkp->dev);
338 else
339 sdkp = NULL;
340 }
341 return sdkp;
342}
343
344static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
345{
346 struct scsi_disk *sdkp;
347
348 mutex_lock(&sd_ref_mutex);
349 sdkp = __scsi_disk_get(disk);
350 mutex_unlock(&sd_ref_mutex);
351 return sdkp;
352}
353
354static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev)
355{
356 struct scsi_disk *sdkp;
357
358 mutex_lock(&sd_ref_mutex);
359 sdkp = dev_get_drvdata(dev);
360 if (sdkp)
361 sdkp = __scsi_disk_get(sdkp->disk);
362 mutex_unlock(&sd_ref_mutex);
363 return sdkp;
364}
365
366static void scsi_disk_put(struct scsi_disk *sdkp)
367{
368 struct scsi_device *sdev = sdkp->device;
369
370 mutex_lock(&sd_ref_mutex);
371 put_device(&sdkp->dev);
372 scsi_device_put(sdev);
373 mutex_unlock(&sd_ref_mutex);
374}
375
376static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif)
377{
378 unsigned int prot_op = SCSI_PROT_NORMAL;
379 unsigned int dix = scsi_prot_sg_count(scmd);
380
381 if (scmd->sc_data_direction == DMA_FROM_DEVICE) {
382 if (dif && dix)
383 prot_op = SCSI_PROT_READ_PASS;
384 else if (dif && !dix)
385 prot_op = SCSI_PROT_READ_STRIP;
386 else if (!dif && dix)
387 prot_op = SCSI_PROT_READ_INSERT;
388 } else {
389 if (dif && dix)
390 prot_op = SCSI_PROT_WRITE_PASS;
391 else if (dif && !dix)
392 prot_op = SCSI_PROT_WRITE_INSERT;
393 else if (!dif && dix)
394 prot_op = SCSI_PROT_WRITE_STRIP;
395 }
396
397 scsi_set_prot_op(scmd, prot_op);
398 scsi_set_prot_type(scmd, dif);
399}
400
401
402
403
404
405
406
407
408
409static int sd_prep_fn(struct request_queue *q, struct request *rq)
410{
411 struct scsi_cmnd *SCpnt;
412 struct scsi_device *sdp = q->queuedata;
413 struct gendisk *disk = rq->rq_disk;
414 struct scsi_disk *sdkp;
415 sector_t block = blk_rq_pos(rq);
416 sector_t threshold;
417 unsigned int this_count = blk_rq_sectors(rq);
418 int ret, host_dif;
419 unsigned char protect;
420
421 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
422 ret = scsi_setup_blk_pc_cmnd(sdp, rq);
423 goto out;
424 } else if (rq->cmd_type != REQ_TYPE_FS) {
425 ret = BLKPREP_KILL;
426 goto out;
427 }
428 ret = scsi_setup_fs_cmnd(sdp, rq);
429 if (ret != BLKPREP_OK)
430 goto out;
431 SCpnt = rq->special;
432 sdkp = scsi_disk(disk);
433
434
435
436 ret = BLKPREP_KILL;
437
438 SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt,
439 "sd_init_command: block=%llu, "
440 "count=%d\n",
441 (unsigned long long)block,
442 this_count));
443
444 if (!sdp || !scsi_device_online(sdp) ||
445 block + blk_rq_sectors(rq) > get_capacity(disk)) {
446 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
447 "Finishing %u sectors\n",
448 blk_rq_sectors(rq)));
449 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
450 "Retry with 0x%p\n", SCpnt));
451 goto out;
452 }
453
454 if (sdp->changed) {
455
456
457
458
459
460 goto out;
461 }
462
463
464
465
466
467 threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS *
468 (sdp->sector_size / 512);
469
470 if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) {
471 if (block < threshold) {
472
473 this_count = threshold - block;
474 } else {
475
476 this_count = sdp->sector_size / 512;
477 }
478 }
479
480 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n",
481 (unsigned long long)block));
482
483
484
485
486
487
488
489
490
491
492
493
494 if (sdp->sector_size == 1024) {
495 if ((block & 1) || (blk_rq_sectors(rq) & 1)) {
496 scmd_printk(KERN_ERR, SCpnt,
497 "Bad block number requested\n");
498 goto out;
499 } else {
500 block = block >> 1;
501 this_count = this_count >> 1;
502 }
503 }
504 if (sdp->sector_size == 2048) {
505 if ((block & 3) || (blk_rq_sectors(rq) & 3)) {
506 scmd_printk(KERN_ERR, SCpnt,
507 "Bad block number requested\n");
508 goto out;
509 } else {
510 block = block >> 2;
511 this_count = this_count >> 2;
512 }
513 }
514 if (sdp->sector_size == 4096) {
515 if ((block & 7) || (blk_rq_sectors(rq) & 7)) {
516 scmd_printk(KERN_ERR, SCpnt,
517 "Bad block number requested\n");
518 goto out;
519 } else {
520 block = block >> 3;
521 this_count = this_count >> 3;
522 }
523 }
524 if (rq_data_dir(rq) == WRITE) {
525 if (!sdp->writeable) {
526 goto out;
527 }
528 SCpnt->cmnd[0] = WRITE_6;
529 SCpnt->sc_data_direction = DMA_TO_DEVICE;
530
531 if (blk_integrity_rq(rq) &&
532 sd_dif_prepare(rq, block, sdp->sector_size) == -EIO)
533 goto out;
534
535 } else if (rq_data_dir(rq) == READ) {
536 SCpnt->cmnd[0] = READ_6;
537 SCpnt->sc_data_direction = DMA_FROM_DEVICE;
538 } else {
539 scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags);
540 goto out;
541 }
542
543 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
544 "%s %d/%u 512 byte blocks.\n",
545 (rq_data_dir(rq) == WRITE) ?
546 "writing" : "reading", this_count,
547 blk_rq_sectors(rq)));
548
549
550 host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
551 if (host_dif)
552 protect = 1 << 5;
553 else
554 protect = 0;
555
556 if (host_dif == SD_DIF_TYPE2_PROTECTION) {
557 SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
558
559 if (unlikely(SCpnt->cmnd == NULL)) {
560 ret = BLKPREP_DEFER;
561 goto out;
562 }
563
564 SCpnt->cmd_len = SD_EXT_CDB_SIZE;
565 memset(SCpnt->cmnd, 0, SCpnt->cmd_len);
566 SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD;
567 SCpnt->cmnd[7] = 0x18;
568 SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32;
569 SCpnt->cmnd[10] = protect | (blk_fua_rq(rq) ? 0x8 : 0);
570
571
572 SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
573 SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
574 SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
575 SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
576 SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff;
577 SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff;
578 SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff;
579 SCpnt->cmnd[19] = (unsigned char) block & 0xff;
580
581
582 SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff;
583 SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff;
584 SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff;
585 SCpnt->cmnd[23] = (unsigned char) block & 0xff;
586
587
588 SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff;
589 SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff;
590 SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff;
591 SCpnt->cmnd[31] = (unsigned char) this_count & 0xff;
592 } else if (block > 0xffffffff) {
593 SCpnt->cmnd[0] += READ_16 - READ_6;
594 SCpnt->cmnd[1] = protect | (blk_fua_rq(rq) ? 0x8 : 0);
595 SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
596 SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
597 SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
598 SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
599 SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff;
600 SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff;
601 SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff;
602 SCpnt->cmnd[9] = (unsigned char) block & 0xff;
603 SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff;
604 SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff;
605 SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff;
606 SCpnt->cmnd[13] = (unsigned char) this_count & 0xff;
607 SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0;
608 } else if ((this_count > 0xff) || (block > 0x1fffff) ||
609 scsi_device_protection(SCpnt->device) ||
610 SCpnt->device->use_10_for_rw) {
611 if (this_count > 0xffff)
612 this_count = 0xffff;
613
614 SCpnt->cmnd[0] += READ_10 - READ_6;
615 SCpnt->cmnd[1] = protect | (blk_fua_rq(rq) ? 0x8 : 0);
616 SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
617 SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
618 SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
619 SCpnt->cmnd[5] = (unsigned char) block & 0xff;
620 SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0;
621 SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
622 SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
623 } else {
624 if (unlikely(blk_fua_rq(rq))) {
625
626
627
628
629
630
631 scmd_printk(KERN_ERR, SCpnt,
632 "FUA write on READ/WRITE(6) drive\n");
633 goto out;
634 }
635
636 SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f);
637 SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff);
638 SCpnt->cmnd[3] = (unsigned char) block & 0xff;
639 SCpnt->cmnd[4] = (unsigned char) this_count;
640 SCpnt->cmnd[5] = 0;
641 }
642 SCpnt->sdb.length = this_count * sdp->sector_size;
643
644
645 if (host_dif || scsi_prot_sg_count(SCpnt))
646 sd_prot_op(SCpnt, host_dif);
647
648
649
650
651
652
653 SCpnt->transfersize = sdp->sector_size;
654 SCpnt->underflow = this_count << 9;
655 SCpnt->allowed = SD_MAX_RETRIES;
656
657
658
659
660
661 ret = BLKPREP_OK;
662 out:
663 return scsi_prep_return(q, rq, ret);
664}
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679static int sd_open(struct block_device *bdev, fmode_t mode)
680{
681 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
682 struct scsi_device *sdev;
683 int retval;
684
685 if (!sdkp)
686 return -ENXIO;
687
688 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
689
690 sdev = sdkp->device;
691
692
693
694
695
696 retval = -ENXIO;
697 if (!scsi_block_when_processing_errors(sdev))
698 goto error_out;
699
700 if (sdev->removable || sdkp->write_prot)
701 check_disk_change(bdev);
702
703
704
705
706 retval = -ENOMEDIUM;
707 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
708 goto error_out;
709
710
711
712
713
714 retval = -EROFS;
715 if (sdkp->write_prot && (mode & FMODE_WRITE))
716 goto error_out;
717
718
719
720
721
722
723
724 retval = -ENXIO;
725 if (!scsi_device_online(sdev))
726 goto error_out;
727
728 if (!sdkp->openers++ && sdev->removable) {
729 if (scsi_block_when_processing_errors(sdev))
730 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
731 }
732
733 return 0;
734
735error_out:
736 scsi_disk_put(sdkp);
737 return retval;
738}
739
740
741
742
743
744
745
746
747
748
749
750
751static int sd_release(struct gendisk *disk, fmode_t mode)
752{
753 struct scsi_disk *sdkp = scsi_disk(disk);
754 struct scsi_device *sdev = sdkp->device;
755
756 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
757
758 if (!--sdkp->openers && sdev->removable) {
759 if (scsi_block_when_processing_errors(sdev))
760 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
761 }
762
763
764
765
766
767 scsi_disk_put(sdkp);
768 return 0;
769}
770
771static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
772{
773 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
774 struct scsi_device *sdp = sdkp->device;
775 struct Scsi_Host *host = sdp->host;
776 int diskinfo[4];
777
778
779 diskinfo[0] = 0x40;
780 diskinfo[1] = 0x20;
781 diskinfo[2] = sdkp->capacity >> 11;
782
783
784 if (host->hostt->bios_param)
785 host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo);
786 else
787 scsicam_bios_param(bdev, sdkp->capacity, diskinfo);
788
789 geo->heads = diskinfo[0];
790 geo->sectors = diskinfo[1];
791 geo->cylinders = diskinfo[2];
792 return 0;
793}
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809static int sd_ioctl(struct block_device *bdev, fmode_t mode,
810 unsigned int cmd, unsigned long arg)
811{
812 struct gendisk *disk = bdev->bd_disk;
813 struct scsi_device *sdp = scsi_disk(disk)->device;
814 void __user *p = (void __user *)arg;
815 int error;
816
817 SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n",
818 disk->disk_name, cmd));
819
820
821
822
823
824
825
826 error = scsi_nonblockable_ioctl(sdp, cmd, p,
827 (mode & FMODE_NDELAY) != 0);
828 if (!scsi_block_when_processing_errors(sdp) || !error)
829 return error;
830
831
832
833
834
835
836 switch (cmd) {
837 case SCSI_IOCTL_GET_IDLUN:
838 case SCSI_IOCTL_GET_BUS_NUMBER:
839 return scsi_ioctl(sdp, cmd, p);
840 default:
841 error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
842 if (error != -ENOTTY)
843 return error;
844 }
845 return scsi_ioctl(sdp, cmd, p);
846}
847
848static void set_media_not_present(struct scsi_disk *sdkp)
849{
850 sdkp->media_present = 0;
851 sdkp->capacity = 0;
852 sdkp->device->changed = 1;
853}
854
855
856
857
858
859
860
861
862
863static int sd_media_changed(struct gendisk *disk)
864{
865 struct scsi_disk *sdkp = scsi_disk(disk);
866 struct scsi_device *sdp = sdkp->device;
867 struct scsi_sense_hdr *sshdr = NULL;
868 int retval;
869
870 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n"));
871
872 if (!sdp->removable)
873 return 0;
874
875
876
877
878
879
880
881 if (!scsi_device_online(sdp)) {
882 set_media_not_present(sdkp);
883 retval = 1;
884 goto out;
885 }
886
887
888
889
890
891
892
893
894
895
896 retval = -ENODEV;
897
898 if (scsi_block_when_processing_errors(sdp)) {
899 sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL);
900 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
901 sshdr);
902 }
903
904
905
906
907
908
909
910 if (retval || (scsi_sense_valid(sshdr) &&
911
912 sshdr->asc == 0x3a)) {
913 set_media_not_present(sdkp);
914 retval = 1;
915 goto out;
916 }
917
918
919
920
921
922
923 sdkp->media_present = 1;
924
925 retval = sdp->changed;
926 sdp->changed = 0;
927out:
928 if (retval != sdkp->previous_state)
929 sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL);
930 sdkp->previous_state = retval;
931 kfree(sshdr);
932 return retval;
933}
934
935static int sd_sync_cache(struct scsi_disk *sdkp)
936{
937 int retries, res;
938 struct scsi_device *sdp = sdkp->device;
939 struct scsi_sense_hdr sshdr;
940
941 if (!scsi_device_online(sdp))
942 return -ENODEV;
943
944
945 for (retries = 3; retries > 0; --retries) {
946 unsigned char cmd[10] = { 0 };
947
948 cmd[0] = SYNCHRONIZE_CACHE;
949
950
951
952
953 res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
954 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
955 if (res == 0)
956 break;
957 }
958
959 if (res) {
960 sd_print_result(sdkp, res);
961 if (driver_byte(res) & DRIVER_SENSE)
962 sd_print_sense_hdr(sdkp, &sshdr);
963 }
964
965 if (res)
966 return -EIO;
967 return 0;
968}
969
970static void sd_prepare_flush(struct request_queue *q, struct request *rq)
971{
972 rq->cmd_type = REQ_TYPE_BLOCK_PC;
973 rq->timeout = SD_TIMEOUT;
974 rq->cmd[0] = SYNCHRONIZE_CACHE;
975 rq->cmd_len = 10;
976}
977
978static void sd_rescan(struct device *dev)
979{
980 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
981
982 if (sdkp) {
983 revalidate_disk(sdkp->disk);
984 scsi_disk_put(sdkp);
985 }
986}
987
988
989#ifdef CONFIG_COMPAT
990
991
992
993
994static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
995 unsigned int cmd, unsigned long arg)
996{
997 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
998
999
1000
1001
1002
1003
1004
1005 if (!scsi_block_when_processing_errors(sdev))
1006 return -ENODEV;
1007
1008 if (sdev->host->hostt->compat_ioctl) {
1009 int ret;
1010
1011 ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
1012
1013 return ret;
1014 }
1015
1016
1017
1018
1019 return -ENOIOCTLCMD;
1020}
1021#endif
1022
1023static const struct block_device_operations sd_fops = {
1024 .owner = THIS_MODULE,
1025 .open = sd_open,
1026 .release = sd_release,
1027 .locked_ioctl = sd_ioctl,
1028 .getgeo = sd_getgeo,
1029#ifdef CONFIG_COMPAT
1030 .compat_ioctl = sd_compat_ioctl,
1031#endif
1032 .media_changed = sd_media_changed,
1033 .revalidate_disk = sd_revalidate_disk,
1034};
1035
1036static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1037{
1038 u64 start_lba = blk_rq_pos(scmd->request);
1039 u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512);
1040 u64 bad_lba;
1041 int info_valid;
1042
1043 if (!blk_fs_request(scmd->request))
1044 return 0;
1045
1046 info_valid = scsi_get_sense_info_fld(scmd->sense_buffer,
1047 SCSI_SENSE_BUFFERSIZE,
1048 &bad_lba);
1049 if (!info_valid)
1050 return 0;
1051
1052 if (scsi_bufflen(scmd) <= scmd->device->sector_size)
1053 return 0;
1054
1055 if (scmd->device->sector_size < 512) {
1056
1057 start_lba <<= 1;
1058 end_lba <<= 1;
1059 } else {
1060
1061 u64 factor = scmd->device->sector_size / 512;
1062 do_div(start_lba, factor);
1063 do_div(end_lba, factor);
1064 }
1065
1066
1067
1068
1069 if (bad_lba < start_lba || bad_lba >= end_lba)
1070 return 0;
1071
1072
1073
1074
1075 return (bad_lba - start_lba) * scmd->device->sector_size;
1076}
1077
1078
1079
1080
1081
1082
1083
1084
1085static int sd_done(struct scsi_cmnd *SCpnt)
1086{
1087 int result = SCpnt->result;
1088 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
1089 struct scsi_sense_hdr sshdr;
1090 struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
1091 int sense_valid = 0;
1092 int sense_deferred = 0;
1093
1094 if (result) {
1095 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
1096 if (sense_valid)
1097 sense_deferred = scsi_sense_is_deferred(&sshdr);
1098 }
1099#ifdef CONFIG_SCSI_LOGGING
1100 SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt));
1101 if (sense_valid) {
1102 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
1103 "sd_done: sb[respc,sk,asc,"
1104 "ascq]=%x,%x,%x,%x\n",
1105 sshdr.response_code,
1106 sshdr.sense_key, sshdr.asc,
1107 sshdr.ascq));
1108 }
1109#endif
1110 if (driver_byte(result) != DRIVER_SENSE &&
1111 (!sense_valid || sense_deferred))
1112 goto out;
1113
1114 switch (sshdr.sense_key) {
1115 case HARDWARE_ERROR:
1116 case MEDIUM_ERROR:
1117 good_bytes = sd_completed_bytes(SCpnt);
1118 break;
1119 case RECOVERED_ERROR:
1120 good_bytes = scsi_bufflen(SCpnt);
1121 break;
1122 case NO_SENSE:
1123
1124
1125
1126
1127 scsi_print_sense("sd", SCpnt);
1128 SCpnt->result = 0;
1129 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1130 break;
1131 case ABORTED_COMMAND:
1132 if (sshdr.asc == 0x10) {
1133 scsi_print_result(SCpnt);
1134 scsi_print_sense("sd", SCpnt);
1135 good_bytes = sd_completed_bytes(SCpnt);
1136 }
1137 break;
1138 case ILLEGAL_REQUEST:
1139 if (sshdr.asc == 0x10) {
1140 scsi_print_result(SCpnt);
1141 scsi_print_sense("sd", SCpnt);
1142 good_bytes = sd_completed_bytes(SCpnt);
1143 }
1144 break;
1145 default:
1146 break;
1147 }
1148 out:
1149 if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt))
1150 sd_dif_complete(SCpnt, good_bytes);
1151
1152 if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type)
1153 == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd)
1154 mempool_free(SCpnt->cmnd, sd_cdb_pool);
1155
1156 return good_bytes;
1157}
1158
1159static int media_not_present(struct scsi_disk *sdkp,
1160 struct scsi_sense_hdr *sshdr)
1161{
1162
1163 if (!scsi_sense_valid(sshdr))
1164 return 0;
1165
1166 if (sshdr->sense_key != NOT_READY &&
1167 sshdr->sense_key != UNIT_ATTENTION)
1168 return 0;
1169 if (sshdr->asc != 0x3A)
1170 return 0;
1171
1172 set_media_not_present(sdkp);
1173 return 1;
1174}
1175
1176
1177
1178
1179static void
1180sd_spinup_disk(struct scsi_disk *sdkp)
1181{
1182 unsigned char cmd[10];
1183 unsigned long spintime_expire = 0;
1184 int retries, spintime;
1185 unsigned int the_result;
1186 struct scsi_sense_hdr sshdr;
1187 int sense_valid = 0;
1188
1189 spintime = 0;
1190
1191
1192
1193 do {
1194 retries = 0;
1195
1196 do {
1197 cmd[0] = TEST_UNIT_READY;
1198 memset((void *) &cmd[1], 0, 9);
1199
1200 the_result = scsi_execute_req(sdkp->device, cmd,
1201 DMA_NONE, NULL, 0,
1202 &sshdr, SD_TIMEOUT,
1203 SD_MAX_RETRIES, NULL);
1204
1205
1206
1207
1208
1209
1210 if (media_not_present(sdkp, &sshdr))
1211 return;
1212
1213 if (the_result)
1214 sense_valid = scsi_sense_valid(&sshdr);
1215 retries++;
1216 } while (retries < 3 &&
1217 (!scsi_status_is_good(the_result) ||
1218 ((driver_byte(the_result) & DRIVER_SENSE) &&
1219 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
1220
1221 if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
1222
1223
1224 if(!spintime && !scsi_status_is_good(the_result)) {
1225 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
1226 sd_print_result(sdkp, the_result);
1227 }
1228 break;
1229 }
1230
1231
1232
1233
1234 if (sdkp->device->no_start_on_add)
1235 break;
1236
1237 if (sense_valid && sshdr.sense_key == NOT_READY) {
1238 if (sshdr.asc == 4 && sshdr.ascq == 3)
1239 break;
1240 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
1241 break;
1242 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
1243 break;
1244
1245
1246
1247 if (!spintime) {
1248 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1249 cmd[0] = START_STOP;
1250 cmd[1] = 1;
1251 memset((void *) &cmd[2], 0, 8);
1252 cmd[4] = 1;
1253 if (sdkp->device->start_stop_pwr_cond)
1254 cmd[4] |= 1 << 4;
1255 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
1256 NULL, 0, &sshdr,
1257 SD_TIMEOUT, SD_MAX_RETRIES,
1258 NULL);
1259 spintime_expire = jiffies + 100 * HZ;
1260 spintime = 1;
1261 }
1262
1263 msleep(1000);
1264 printk(".");
1265
1266
1267
1268
1269
1270
1271 } else if (sense_valid &&
1272 sshdr.sense_key == UNIT_ATTENTION &&
1273 sshdr.asc == 0x28) {
1274 if (!spintime) {
1275 spintime_expire = jiffies + 5 * HZ;
1276 spintime = 1;
1277 }
1278
1279 msleep(1000);
1280 } else {
1281
1282
1283 if(!spintime) {
1284 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
1285 sd_print_sense_hdr(sdkp, &sshdr);
1286 }
1287 break;
1288 }
1289
1290 } while (spintime && time_before_eq(jiffies, spintime_expire));
1291
1292 if (spintime) {
1293 if (scsi_status_is_good(the_result))
1294 printk("ready\n");
1295 else
1296 printk("not responding...\n");
1297 }
1298}
1299
1300
1301
1302
1303
1304void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
1305{
1306 struct scsi_device *sdp = sdkp->device;
1307 u8 type;
1308
1309 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
1310 return;
1311
1312 type = ((buffer[12] >> 1) & 7) + 1;
1313
1314 if (type == sdkp->protection_type || !sdkp->first_scan)
1315 return;
1316
1317 sdkp->protection_type = type;
1318
1319 if (type > SD_DIF_TYPE3_PROTECTION) {
1320 sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \
1321 "protection type %u. Disabling disk!\n", type);
1322 sdkp->capacity = 0;
1323 return;
1324 }
1325
1326 if (scsi_host_dif_capable(sdp->host, type))
1327 sd_printk(KERN_NOTICE, sdkp,
1328 "Enabling DIF Type %u protection\n", type);
1329 else
1330 sd_printk(KERN_NOTICE, sdkp,
1331 "Disabling DIF Type %u protection\n", type);
1332}
1333
1334static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
1335 struct scsi_sense_hdr *sshdr, int sense_valid,
1336 int the_result)
1337{
1338 sd_print_result(sdkp, the_result);
1339 if (driver_byte(the_result) & DRIVER_SENSE)
1340 sd_print_sense_hdr(sdkp, sshdr);
1341 else
1342 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
1343
1344
1345
1346
1347
1348 if (sdp->removable &&
1349 sense_valid && sshdr->sense_key == NOT_READY)
1350 sdp->changed = 1;
1351
1352
1353
1354
1355
1356
1357 sdkp->capacity = 0;
1358}
1359
1360#define RC16_LEN 32
1361#if RC16_LEN > SD_BUF_SIZE
1362#error RC16_LEN must not be more than SD_BUF_SIZE
1363#endif
1364
1365static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
1366 unsigned char *buffer)
1367{
1368 unsigned char cmd[16];
1369 struct scsi_sense_hdr sshdr;
1370 int sense_valid = 0;
1371 int the_result;
1372 int retries = 3;
1373 unsigned int alignment;
1374 unsigned long long lba;
1375 unsigned sector_size;
1376
1377 do {
1378 memset(cmd, 0, 16);
1379 cmd[0] = SERVICE_ACTION_IN;
1380 cmd[1] = SAI_READ_CAPACITY_16;
1381 cmd[13] = RC16_LEN;
1382 memset(buffer, 0, RC16_LEN);
1383
1384 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
1385 buffer, RC16_LEN, &sshdr,
1386 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1387
1388 if (media_not_present(sdkp, &sshdr))
1389 return -ENODEV;
1390
1391 if (the_result) {
1392 sense_valid = scsi_sense_valid(&sshdr);
1393 if (sense_valid &&
1394 sshdr.sense_key == ILLEGAL_REQUEST &&
1395 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
1396 sshdr.ascq == 0x00)
1397
1398
1399
1400 return -EINVAL;
1401 }
1402 retries--;
1403
1404 } while (the_result && retries);
1405
1406 if (the_result) {
1407 sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n");
1408 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
1409 return -EINVAL;
1410 }
1411
1412 sector_size = get_unaligned_be32(&buffer[8]);
1413 lba = get_unaligned_be64(&buffer[0]);
1414
1415 sd_read_protection_type(sdkp, buffer);
1416
1417 if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) {
1418 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
1419 "kernel compiled with support for large block "
1420 "devices.\n");
1421 sdkp->capacity = 0;
1422 return -EOVERFLOW;
1423 }
1424
1425
1426 sdkp->hw_sector_size = (1 << (buffer[13] & 0xf)) * sector_size;
1427
1428
1429 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
1430 blk_queue_alignment_offset(sdp->request_queue, alignment);
1431 if (alignment && sdkp->first_scan)
1432 sd_printk(KERN_NOTICE, sdkp,
1433 "physical block alignment offset: %u\n", alignment);
1434
1435 sdkp->capacity = lba + 1;
1436 return sector_size;
1437}
1438
1439static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
1440 unsigned char *buffer)
1441{
1442 unsigned char cmd[16];
1443 struct scsi_sense_hdr sshdr;
1444 int sense_valid = 0;
1445 int the_result;
1446 int retries = 3;
1447 sector_t lba;
1448 unsigned sector_size;
1449
1450 do {
1451 cmd[0] = READ_CAPACITY;
1452 memset(&cmd[1], 0, 9);
1453 memset(buffer, 0, 8);
1454
1455 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
1456 buffer, 8, &sshdr,
1457 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1458
1459 if (media_not_present(sdkp, &sshdr))
1460 return -ENODEV;
1461
1462 if (the_result)
1463 sense_valid = scsi_sense_valid(&sshdr);
1464 retries--;
1465
1466 } while (the_result && retries);
1467
1468 if (the_result) {
1469 sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n");
1470 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
1471 return -EINVAL;
1472 }
1473
1474 sector_size = get_unaligned_be32(&buffer[4]);
1475 lba = get_unaligned_be32(&buffer[0]);
1476
1477 if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) {
1478 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
1479 "kernel compiled with support for large block "
1480 "devices.\n");
1481 sdkp->capacity = 0;
1482 return -EOVERFLOW;
1483 }
1484
1485 sdkp->capacity = lba + 1;
1486 sdkp->hw_sector_size = sector_size;
1487 return sector_size;
1488}
1489
1490static int sd_try_rc16_first(struct scsi_device *sdp)
1491{
1492 if (sdp->scsi_level > SCSI_SPC_2)
1493 return 1;
1494 if (scsi_device_protection(sdp))
1495 return 1;
1496 return 0;
1497}
1498
1499
1500
1501
1502static void
1503sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
1504{
1505 int sector_size;
1506 struct scsi_device *sdp = sdkp->device;
1507 sector_t old_capacity = sdkp->capacity;
1508
1509 if (sd_try_rc16_first(sdp)) {
1510 sector_size = read_capacity_16(sdkp, sdp, buffer);
1511 if (sector_size == -EOVERFLOW)
1512 goto got_data;
1513 if (sector_size == -ENODEV)
1514 return;
1515 if (sector_size < 0)
1516 sector_size = read_capacity_10(sdkp, sdp, buffer);
1517 if (sector_size < 0)
1518 return;
1519 } else {
1520 sector_size = read_capacity_10(sdkp, sdp, buffer);
1521 if (sector_size == -EOVERFLOW)
1522 goto got_data;
1523 if (sector_size < 0)
1524 return;
1525 if ((sizeof(sdkp->capacity) > 4) &&
1526 (sdkp->capacity > 0xffffffffULL)) {
1527 int old_sector_size = sector_size;
1528 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
1529 "Trying to use READ CAPACITY(16).\n");
1530 sector_size = read_capacity_16(sdkp, sdp, buffer);
1531 if (sector_size < 0) {
1532 sd_printk(KERN_NOTICE, sdkp,
1533 "Using 0xffffffff as device size\n");
1534 sdkp->capacity = 1 + (sector_t) 0xffffffff;
1535 sector_size = old_sector_size;
1536 goto got_data;
1537 }
1538 }
1539 }
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551 if (sdp->fix_capacity ||
1552 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
1553 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
1554 "from its reported value: %llu\n",
1555 (unsigned long long) sdkp->capacity);
1556 --sdkp->capacity;
1557 }
1558
1559got_data:
1560 if (sector_size == 0) {
1561 sector_size = 512;
1562 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
1563 "assuming 512.\n");
1564 }
1565
1566 if (sector_size != 512 &&
1567 sector_size != 1024 &&
1568 sector_size != 2048 &&
1569 sector_size != 4096 &&
1570 sector_size != 256) {
1571 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
1572 sector_size);
1573
1574
1575
1576
1577
1578
1579 sdkp->capacity = 0;
1580
1581
1582
1583
1584
1585
1586 sector_size = 512;
1587 }
1588 blk_queue_logical_block_size(sdp->request_queue, sector_size);
1589
1590 {
1591 char cap_str_2[10], cap_str_10[10];
1592 u64 sz = (u64)sdkp->capacity << ilog2(sector_size);
1593
1594 string_get_size(sz, STRING_UNITS_2, cap_str_2,
1595 sizeof(cap_str_2));
1596 string_get_size(sz, STRING_UNITS_10, cap_str_10,
1597 sizeof(cap_str_10));
1598
1599 if (sdkp->first_scan || old_capacity != sdkp->capacity) {
1600 sd_printk(KERN_NOTICE, sdkp,
1601 "%llu %d-byte logical blocks: (%s/%s)\n",
1602 (unsigned long long)sdkp->capacity,
1603 sector_size, cap_str_10, cap_str_2);
1604
1605 if (sdkp->hw_sector_size != sector_size)
1606 sd_printk(KERN_NOTICE, sdkp,
1607 "%u-byte physical blocks\n",
1608 sdkp->hw_sector_size);
1609 }
1610 }
1611
1612
1613 if (sector_size == 4096)
1614 sdkp->capacity <<= 3;
1615 else if (sector_size == 2048)
1616 sdkp->capacity <<= 2;
1617 else if (sector_size == 1024)
1618 sdkp->capacity <<= 1;
1619 else if (sector_size == 256)
1620 sdkp->capacity >>= 1;
1621
1622 blk_queue_physical_block_size(sdp->request_queue, sdkp->hw_sector_size);
1623 sdkp->device->sector_size = sector_size;
1624}
1625
1626
1627static inline int
1628sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
1629 unsigned char *buffer, int len, struct scsi_mode_data *data,
1630 struct scsi_sense_hdr *sshdr)
1631{
1632 return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
1633 SD_TIMEOUT, SD_MAX_RETRIES, data,
1634 sshdr);
1635}
1636
1637
1638
1639
1640
1641static void
1642sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
1643{
1644 int res;
1645 struct scsi_device *sdp = sdkp->device;
1646 struct scsi_mode_data data;
1647 int old_wp = sdkp->write_prot;
1648
1649 set_disk_ro(sdkp->disk, 0);
1650 if (sdp->skip_ms_page_3f) {
1651 sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1652 return;
1653 }
1654
1655 if (sdp->use_192_bytes_for_3f) {
1656 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
1657 } else {
1658
1659
1660
1661
1662
1663 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
1664
1665
1666
1667
1668
1669
1670
1671 if (!scsi_status_is_good(res))
1672 res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
1673
1674
1675
1676
1677 if (!scsi_status_is_good(res))
1678 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
1679 &data, NULL);
1680 }
1681
1682 if (!scsi_status_is_good(res)) {
1683 sd_printk(KERN_WARNING, sdkp,
1684 "Test WP failed, assume Write Enabled\n");
1685 } else {
1686 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
1687 set_disk_ro(sdkp->disk, sdkp->write_prot);
1688 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
1689 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
1690 sdkp->write_prot ? "on" : "off");
1691 sd_printk(KERN_DEBUG, sdkp,
1692 "Mode Sense: %02x %02x %02x %02x\n",
1693 buffer[0], buffer[1], buffer[2], buffer[3]);
1694 }
1695 }
1696}
1697
1698
1699
1700
1701
1702static void
1703sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
1704{
1705 int len = 0, res;
1706 struct scsi_device *sdp = sdkp->device;
1707
1708 int dbd;
1709 int modepage;
1710 struct scsi_mode_data data;
1711 struct scsi_sense_hdr sshdr;
1712 int old_wce = sdkp->WCE;
1713 int old_rcd = sdkp->RCD;
1714 int old_dpofua = sdkp->DPOFUA;
1715
1716 if (sdp->skip_ms_page_8)
1717 goto defaults;
1718
1719 if (sdp->type == TYPE_RBC) {
1720 modepage = 6;
1721 dbd = 8;
1722 } else {
1723 modepage = 8;
1724 dbd = 0;
1725 }
1726
1727
1728 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr);
1729
1730 if (!scsi_status_is_good(res))
1731 goto bad_sense;
1732
1733 if (!data.header_length) {
1734 modepage = 6;
1735 sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n");
1736 }
1737
1738
1739 len = data.length;
1740
1741
1742
1743
1744
1745 if (len < 3)
1746 goto bad_sense;
1747 if (len > 20)
1748 len = 20;
1749
1750
1751 len += data.header_length + data.block_descriptor_length;
1752 if (len > SD_BUF_SIZE)
1753 goto bad_sense;
1754
1755
1756 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr);
1757
1758 if (scsi_status_is_good(res)) {
1759 int offset = data.header_length + data.block_descriptor_length;
1760
1761 if (offset >= SD_BUF_SIZE - 2) {
1762 sd_printk(KERN_ERR, sdkp, "Malformed MODE SENSE response\n");
1763 goto defaults;
1764 }
1765
1766 if ((buffer[offset] & 0x3f) != modepage) {
1767 sd_printk(KERN_ERR, sdkp, "Got wrong page\n");
1768 goto defaults;
1769 }
1770
1771 if (modepage == 8) {
1772 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
1773 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
1774 } else {
1775 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
1776 sdkp->RCD = 0;
1777 }
1778
1779 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
1780 if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) {
1781 sd_printk(KERN_NOTICE, sdkp,
1782 "Uses READ/WRITE(6), disabling FUA\n");
1783 sdkp->DPOFUA = 0;
1784 }
1785
1786 if (sdkp->first_scan || old_wce != sdkp->WCE ||
1787 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
1788 sd_printk(KERN_NOTICE, sdkp,
1789 "Write cache: %s, read cache: %s, %s\n",
1790 sdkp->WCE ? "enabled" : "disabled",
1791 sdkp->RCD ? "disabled" : "enabled",
1792 sdkp->DPOFUA ? "supports DPO and FUA"
1793 : "doesn't support DPO or FUA");
1794
1795 return;
1796 }
1797
1798bad_sense:
1799 if (scsi_sense_valid(&sshdr) &&
1800 sshdr.sense_key == ILLEGAL_REQUEST &&
1801 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
1802
1803 sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1804 else
1805 sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n");
1806
1807defaults:
1808 sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n");
1809 sdkp->WCE = 0;
1810 sdkp->RCD = 0;
1811 sdkp->DPOFUA = 0;
1812}
1813
1814
1815
1816
1817
1818void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
1819{
1820 int res, offset;
1821 struct scsi_device *sdp = sdkp->device;
1822 struct scsi_mode_data data;
1823 struct scsi_sense_hdr sshdr;
1824
1825 if (sdp->type != TYPE_DISK)
1826 return;
1827
1828 if (sdkp->protection_type == 0)
1829 return;
1830
1831 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
1832 SD_MAX_RETRIES, &data, &sshdr);
1833
1834 if (!scsi_status_is_good(res) || !data.header_length ||
1835 data.length < 6) {
1836 sd_printk(KERN_WARNING, sdkp,
1837 "getting Control mode page failed, assume no ATO\n");
1838
1839 if (scsi_sense_valid(&sshdr))
1840 sd_print_sense_hdr(sdkp, &sshdr);
1841
1842 return;
1843 }
1844
1845 offset = data.header_length + data.block_descriptor_length;
1846
1847 if ((buffer[offset] & 0x3f) != 0x0a) {
1848 sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
1849 return;
1850 }
1851
1852 if ((buffer[offset + 5] & 0x80) == 0)
1853 return;
1854
1855 sdkp->ATO = 1;
1856
1857 return;
1858}
1859
1860
1861
1862
1863
1864static void sd_read_block_limits(struct scsi_disk *sdkp)
1865{
1866 unsigned int sector_sz = sdkp->device->sector_size;
1867 char *buffer;
1868
1869
1870 buffer = scsi_get_vpd_page(sdkp->device, 0xb0);
1871
1872 if (buffer == NULL)
1873 return;
1874
1875 blk_queue_io_min(sdkp->disk->queue,
1876 get_unaligned_be16(&buffer[6]) * sector_sz);
1877 blk_queue_io_opt(sdkp->disk->queue,
1878 get_unaligned_be32(&buffer[12]) * sector_sz);
1879
1880 kfree(buffer);
1881}
1882
1883
1884
1885
1886
1887static void sd_read_block_characteristics(struct scsi_disk *sdkp)
1888{
1889 char *buffer;
1890 u16 rot;
1891
1892
1893 buffer = scsi_get_vpd_page(sdkp->device, 0xb1);
1894
1895 if (buffer == NULL)
1896 return;
1897
1898 rot = get_unaligned_be16(&buffer[4]);
1899
1900 if (rot == 1)
1901 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue);
1902
1903 kfree(buffer);
1904}
1905
1906static int sd_try_extended_inquiry(struct scsi_device *sdp)
1907{
1908
1909
1910
1911
1912
1913 if (sdp->scsi_level > SCSI_SPC_2)
1914 return 1;
1915 return 0;
1916}
1917
1918
1919
1920
1921
1922
1923static int sd_revalidate_disk(struct gendisk *disk)
1924{
1925 struct scsi_disk *sdkp = scsi_disk(disk);
1926 struct scsi_device *sdp = sdkp->device;
1927 unsigned char *buffer;
1928 unsigned ordered;
1929
1930 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
1931 "sd_revalidate_disk\n"));
1932
1933
1934
1935
1936
1937 if (!scsi_device_online(sdp))
1938 goto out;
1939
1940 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1941 if (!buffer) {
1942 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
1943 "allocation failure.\n");
1944 goto out;
1945 }
1946
1947 sd_spinup_disk(sdkp);
1948
1949
1950
1951
1952
1953 if (sdkp->media_present) {
1954 sd_read_capacity(sdkp, buffer);
1955
1956 if (sd_try_extended_inquiry(sdp)) {
1957 sd_read_block_limits(sdkp);
1958 sd_read_block_characteristics(sdkp);
1959 }
1960
1961 sd_read_write_protect_flag(sdkp, buffer);
1962 sd_read_cache_type(sdkp, buffer);
1963 sd_read_app_tag_own(sdkp, buffer);
1964 }
1965
1966 sdkp->first_scan = 0;
1967
1968
1969
1970
1971
1972
1973
1974 if (sdkp->WCE)
1975 ordered = sdkp->DPOFUA
1976 ? QUEUE_ORDERED_DRAIN_FUA : QUEUE_ORDERED_DRAIN_FLUSH;
1977 else
1978 ordered = QUEUE_ORDERED_DRAIN;
1979
1980 blk_queue_ordered(sdkp->disk->queue, ordered, sd_prepare_flush);
1981
1982 set_capacity(disk, sdkp->capacity);
1983 kfree(buffer);
1984
1985 out:
1986 return 0;
1987}
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
2012{
2013 const int base = 'z' - 'a' + 1;
2014 char *begin = buf + strlen(prefix);
2015 char *end = buf + buflen;
2016 char *p;
2017 int unit;
2018
2019 p = end - 1;
2020 *p = '\0';
2021 unit = base;
2022 do {
2023 if (p == begin)
2024 return -EINVAL;
2025 *--p = 'a' + (index % unit);
2026 index = (index / unit) - 1;
2027 } while (index >= 0);
2028
2029 memmove(begin, p, end - p);
2030 memcpy(buf, prefix, strlen(prefix));
2031
2032 return 0;
2033}
2034
2035
2036
2037
2038static void sd_probe_async(void *data, async_cookie_t cookie)
2039{
2040 struct scsi_disk *sdkp = data;
2041 struct scsi_device *sdp;
2042 struct gendisk *gd;
2043 u32 index;
2044 struct device *dev;
2045
2046 sdp = sdkp->device;
2047 gd = sdkp->disk;
2048 index = sdkp->index;
2049 dev = &sdp->sdev_gendev;
2050
2051 if (index < SD_MAX_DISKS) {
2052 gd->major = sd_major((index & 0xf0) >> 4);
2053 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
2054 gd->minors = SD_MINORS;
2055 }
2056 gd->fops = &sd_fops;
2057 gd->private_data = &sdkp->driver;
2058 gd->queue = sdkp->device->request_queue;
2059
2060
2061 sdp->sector_size = 512;
2062 sdkp->capacity = 0;
2063 sdkp->media_present = 1;
2064 sdkp->write_prot = 0;
2065 sdkp->WCE = 0;
2066 sdkp->RCD = 0;
2067 sdkp->ATO = 0;
2068 sdkp->first_scan = 1;
2069
2070 sd_revalidate_disk(gd);
2071
2072 blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
2073
2074 gd->driverfs_dev = &sdp->sdev_gendev;
2075 gd->flags = GENHD_FL_EXT_DEVT | GENHD_FL_DRIVERFS;
2076 if (sdp->removable)
2077 gd->flags |= GENHD_FL_REMOVABLE;
2078
2079 dev_set_drvdata(dev, sdkp);
2080 add_disk(gd);
2081 sd_dif_config_host(sdkp);
2082
2083 sd_revalidate_disk(gd);
2084
2085 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
2086 sdp->removable ? "removable " : "");
2087 put_device(&sdkp->dev);
2088}
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108static int sd_probe(struct device *dev)
2109{
2110 struct scsi_device *sdp = to_scsi_device(dev);
2111 struct scsi_disk *sdkp;
2112 struct gendisk *gd;
2113 u32 index;
2114 int error;
2115
2116 error = -ENODEV;
2117 if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC)
2118 goto out;
2119
2120 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2121 "sd_attach\n"));
2122
2123 error = -ENOMEM;
2124 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
2125 if (!sdkp)
2126 goto out;
2127
2128 gd = alloc_disk(SD_MINORS);
2129 if (!gd)
2130 goto out_free;
2131
2132 do {
2133 if (!ida_pre_get(&sd_index_ida, GFP_KERNEL))
2134 goto out_put;
2135
2136 spin_lock(&sd_index_lock);
2137 error = ida_get_new(&sd_index_ida, &index);
2138 spin_unlock(&sd_index_lock);
2139 } while (error == -EAGAIN);
2140
2141 if (error)
2142 goto out_put;
2143
2144 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
2145 if (error)
2146 goto out_free_index;
2147
2148 sdkp->device = sdp;
2149 sdkp->driver = &sd_template;
2150 sdkp->disk = gd;
2151 sdkp->index = index;
2152 sdkp->openers = 0;
2153 sdkp->previous_state = 1;
2154
2155 if (!sdp->request_queue->rq_timeout) {
2156 if (sdp->type != TYPE_MOD)
2157 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
2158 else
2159 blk_queue_rq_timeout(sdp->request_queue,
2160 SD_MOD_TIMEOUT);
2161 }
2162
2163 device_initialize(&sdkp->dev);
2164 sdkp->dev.parent = &sdp->sdev_gendev;
2165 sdkp->dev.class = &sd_disk_class;
2166 dev_set_name(&sdkp->dev, dev_name(&sdp->sdev_gendev));
2167
2168 if (device_add(&sdkp->dev))
2169 goto out_free_index;
2170
2171 get_device(&sdp->sdev_gendev);
2172
2173 get_device(&sdkp->dev);
2174 async_schedule(sd_probe_async, sdkp);
2175
2176 return 0;
2177
2178 out_free_index:
2179 spin_lock(&sd_index_lock);
2180 ida_remove(&sd_index_ida, index);
2181 spin_unlock(&sd_index_lock);
2182 out_put:
2183 put_disk(gd);
2184 out_free:
2185 kfree(sdkp);
2186 out:
2187 return error;
2188}
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201static int sd_remove(struct device *dev)
2202{
2203 struct scsi_disk *sdkp;
2204
2205 async_synchronize_full();
2206 sdkp = dev_get_drvdata(dev);
2207 blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn);
2208 device_del(&sdkp->dev);
2209 del_gendisk(sdkp->disk);
2210 sd_shutdown(dev);
2211
2212 mutex_lock(&sd_ref_mutex);
2213 dev_set_drvdata(dev, NULL);
2214 put_device(&sdkp->dev);
2215 mutex_unlock(&sd_ref_mutex);
2216
2217 return 0;
2218}
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229static void scsi_disk_release(struct device *dev)
2230{
2231 struct scsi_disk *sdkp = to_scsi_disk(dev);
2232 struct gendisk *disk = sdkp->disk;
2233
2234 spin_lock(&sd_index_lock);
2235 ida_remove(&sd_index_ida, sdkp->index);
2236 spin_unlock(&sd_index_lock);
2237
2238 disk->private_data = NULL;
2239 put_disk(disk);
2240 put_device(&sdkp->device->sdev_gendev);
2241
2242 kfree(sdkp);
2243}
2244
2245static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
2246{
2247 unsigned char cmd[6] = { START_STOP };
2248 struct scsi_sense_hdr sshdr;
2249 struct scsi_device *sdp = sdkp->device;
2250 int res;
2251
2252 if (start)
2253 cmd[4] |= 1;
2254
2255 if (sdp->start_stop_pwr_cond)
2256 cmd[4] |= start ? 1 << 4 : 3 << 4;
2257
2258 if (!scsi_device_online(sdp))
2259 return -ENODEV;
2260
2261 res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
2262 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2263 if (res) {
2264 sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n");
2265 sd_print_result(sdkp, res);
2266 if (driver_byte(res) & DRIVER_SENSE)
2267 sd_print_sense_hdr(sdkp, &sshdr);
2268 }
2269
2270 return res;
2271}
2272
2273
2274
2275
2276
2277
2278static void sd_shutdown(struct device *dev)
2279{
2280 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
2281
2282 if (!sdkp)
2283 return;
2284
2285 if (sdkp->WCE) {
2286 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
2287 sd_sync_cache(sdkp);
2288 }
2289
2290 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
2291 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
2292 sd_start_stop_device(sdkp, 0);
2293 }
2294
2295 scsi_disk_put(sdkp);
2296}
2297
2298static int sd_suspend(struct device *dev, pm_message_t mesg)
2299{
2300 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
2301 int ret = 0;
2302
2303 if (!sdkp)
2304 return 0;
2305
2306 if (sdkp->WCE) {
2307 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
2308 ret = sd_sync_cache(sdkp);
2309 if (ret)
2310 goto done;
2311 }
2312
2313 if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) {
2314 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
2315 ret = sd_start_stop_device(sdkp, 0);
2316 }
2317
2318done:
2319 scsi_disk_put(sdkp);
2320 return ret;
2321}
2322
2323static int sd_resume(struct device *dev)
2324{
2325 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
2326 int ret = 0;
2327
2328 if (!sdkp->device->manage_start_stop)
2329 goto done;
2330
2331 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
2332 ret = sd_start_stop_device(sdkp, 1);
2333
2334done:
2335 scsi_disk_put(sdkp);
2336 return ret;
2337}
2338
2339
2340
2341
2342
2343
2344
2345static int __init init_sd(void)
2346{
2347 int majors = 0, i, err;
2348
2349 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
2350
2351 for (i = 0; i < SD_MAJORS; i++)
2352 if (register_blkdev(sd_major(i), "sd") == 0)
2353 majors++;
2354
2355 if (!majors)
2356 return -ENODEV;
2357
2358 err = class_register(&sd_disk_class);
2359 if (err)
2360 goto err_out;
2361
2362 err = scsi_register_driver(&sd_template.gendrv);
2363 if (err)
2364 goto err_out_class;
2365
2366 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
2367 0, 0, NULL);
2368 if (!sd_cdb_cache) {
2369 printk(KERN_ERR "sd: can't init extended cdb cache\n");
2370 goto err_out_class;
2371 }
2372
2373 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
2374 if (!sd_cdb_pool) {
2375 printk(KERN_ERR "sd: can't init extended cdb pool\n");
2376 goto err_out_cache;
2377 }
2378
2379 return 0;
2380
2381err_out_cache:
2382 kmem_cache_destroy(sd_cdb_cache);
2383
2384err_out_class:
2385 class_unregister(&sd_disk_class);
2386err_out:
2387 for (i = 0; i < SD_MAJORS; i++)
2388 unregister_blkdev(sd_major(i), "sd");
2389 return err;
2390}
2391
2392
2393
2394
2395
2396
2397static void __exit exit_sd(void)
2398{
2399 int i;
2400
2401 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
2402
2403 mempool_destroy(sd_cdb_pool);
2404 kmem_cache_destroy(sd_cdb_cache);
2405
2406 scsi_unregister_driver(&sd_template.gendrv);
2407 class_unregister(&sd_disk_class);
2408
2409 for (i = 0; i < SD_MAJORS; i++)
2410 unregister_blkdev(sd_major(i), "sd");
2411}
2412
2413module_init(init_sd);
2414module_exit(exit_sd);
2415
2416static void sd_print_sense_hdr(struct scsi_disk *sdkp,
2417 struct scsi_sense_hdr *sshdr)
2418{
2419 sd_printk(KERN_INFO, sdkp, "");
2420 scsi_show_sense_hdr(sshdr);
2421 sd_printk(KERN_INFO, sdkp, "");
2422 scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
2423}
2424
2425static void sd_print_result(struct scsi_disk *sdkp, int result)
2426{
2427 sd_printk(KERN_INFO, sdkp, "");
2428 scsi_show_result(result);
2429}
2430
2431