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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 <linux/slab.h>
53#include <asm/uaccess.h>
54#include <asm/unaligned.h>
55
56#include <scsi/scsi.h>
57#include <scsi/scsi_cmnd.h>
58#include <scsi/scsi_dbg.h>
59#include <scsi/scsi_device.h>
60#include <scsi/scsi_driver.h>
61#include <scsi/scsi_eh.h>
62#include <scsi/scsi_host.h>
63#include <scsi/scsi_ioctl.h>
64#include <scsi/scsicam.h>
65
66#include "sd.h"
67#include "scsi_logging.h"
68
69MODULE_AUTHOR("Eric Youngdale");
70MODULE_DESCRIPTION("SCSI disk (sd) driver");
71MODULE_LICENSE("GPL");
72
73MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
74MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
75MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
76MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
77MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
78MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
79MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
80MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
81MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
82MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
83MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
84MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
85MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
86MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
87MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
88MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
89MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
90MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
91MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
92
93#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
94#define SD_MINORS 16
95#else
96#define SD_MINORS 0
97#endif
98
99static int sd_revalidate_disk(struct gendisk *);
100static void sd_unlock_native_capacity(struct gendisk *disk);
101static int sd_probe(struct device *);
102static int sd_remove(struct device *);
103static void sd_shutdown(struct device *);
104static int sd_suspend(struct device *, pm_message_t state);
105static int sd_resume(struct device *);
106static void sd_rescan(struct device *);
107static int sd_done(struct scsi_cmnd *);
108static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
109static void scsi_disk_release(struct device *cdev);
110static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
111static void sd_print_result(struct scsi_disk *, int);
112
113static DEFINE_SPINLOCK(sd_index_lock);
114static DEFINE_IDA(sd_index_ida);
115
116
117
118
119static DEFINE_MUTEX(sd_ref_mutex);
120
121static struct kmem_cache *sd_cdb_cache;
122static mempool_t *sd_cdb_pool;
123
124static const char *sd_cache_types[] = {
125 "write through", "none", "write back",
126 "write back, no read (daft)"
127};
128
129static ssize_t
130sd_store_cache_type(struct device *dev, struct device_attribute *attr,
131 const char *buf, size_t count)
132{
133 int i, ct = -1, rcd, wce, sp;
134 struct scsi_disk *sdkp = to_scsi_disk(dev);
135 struct scsi_device *sdp = sdkp->device;
136 char buffer[64];
137 char *buffer_data;
138 struct scsi_mode_data data;
139 struct scsi_sense_hdr sshdr;
140 int len;
141
142 if (sdp->type != TYPE_DISK)
143
144
145
146 return -EINVAL;
147
148 for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) {
149 len = strlen(sd_cache_types[i]);
150 if (strncmp(sd_cache_types[i], buf, len) == 0 &&
151 buf[len] == '\n') {
152 ct = i;
153 break;
154 }
155 }
156 if (ct < 0)
157 return -EINVAL;
158 rcd = ct & 0x01 ? 1 : 0;
159 wce = ct & 0x02 ? 1 : 0;
160 if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
161 SD_MAX_RETRIES, &data, NULL))
162 return -EINVAL;
163 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
164 data.block_descriptor_length);
165 buffer_data = buffer + data.header_length +
166 data.block_descriptor_length;
167 buffer_data[2] &= ~0x05;
168 buffer_data[2] |= wce << 2 | rcd;
169 sp = buffer_data[0] & 0x80 ? 1 : 0;
170
171 if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
172 SD_MAX_RETRIES, &data, &sshdr)) {
173 if (scsi_sense_valid(&sshdr))
174 sd_print_sense_hdr(sdkp, &sshdr);
175 return -EINVAL;
176 }
177 revalidate_disk(sdkp->disk);
178 return count;
179}
180
181static ssize_t
182sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr,
183 const char *buf, size_t count)
184{
185 struct scsi_disk *sdkp = to_scsi_disk(dev);
186 struct scsi_device *sdp = sdkp->device;
187
188 if (!capable(CAP_SYS_ADMIN))
189 return -EACCES;
190
191 sdp->manage_start_stop = simple_strtoul(buf, NULL, 10);
192
193 return count;
194}
195
196static ssize_t
197sd_store_allow_restart(struct device *dev, struct device_attribute *attr,
198 const char *buf, size_t count)
199{
200 struct scsi_disk *sdkp = to_scsi_disk(dev);
201 struct scsi_device *sdp = sdkp->device;
202
203 if (!capable(CAP_SYS_ADMIN))
204 return -EACCES;
205
206 if (sdp->type != TYPE_DISK)
207 return -EINVAL;
208
209 sdp->allow_restart = simple_strtoul(buf, NULL, 10);
210
211 return count;
212}
213
214static ssize_t
215sd_show_cache_type(struct device *dev, struct device_attribute *attr,
216 char *buf)
217{
218 struct scsi_disk *sdkp = to_scsi_disk(dev);
219 int ct = sdkp->RCD + 2*sdkp->WCE;
220
221 return snprintf(buf, 40, "%s\n", sd_cache_types[ct]);
222}
223
224static ssize_t
225sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf)
226{
227 struct scsi_disk *sdkp = to_scsi_disk(dev);
228
229 return snprintf(buf, 20, "%u\n", sdkp->DPOFUA);
230}
231
232static ssize_t
233sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr,
234 char *buf)
235{
236 struct scsi_disk *sdkp = to_scsi_disk(dev);
237 struct scsi_device *sdp = sdkp->device;
238
239 return snprintf(buf, 20, "%u\n", sdp->manage_start_stop);
240}
241
242static ssize_t
243sd_show_allow_restart(struct device *dev, struct device_attribute *attr,
244 char *buf)
245{
246 struct scsi_disk *sdkp = to_scsi_disk(dev);
247
248 return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart);
249}
250
251static ssize_t
252sd_show_protection_type(struct device *dev, struct device_attribute *attr,
253 char *buf)
254{
255 struct scsi_disk *sdkp = to_scsi_disk(dev);
256
257 return snprintf(buf, 20, "%u\n", sdkp->protection_type);
258}
259
260static ssize_t
261sd_show_protection_mode(struct device *dev, struct device_attribute *attr,
262 char *buf)
263{
264 struct scsi_disk *sdkp = to_scsi_disk(dev);
265 struct scsi_device *sdp = sdkp->device;
266 unsigned int dif, dix;
267
268 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
269 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
270
271 if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) {
272 dif = 0;
273 dix = 1;
274 }
275
276 if (!dif && !dix)
277 return snprintf(buf, 20, "none\n");
278
279 return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif);
280}
281
282static ssize_t
283sd_show_app_tag_own(struct device *dev, struct device_attribute *attr,
284 char *buf)
285{
286 struct scsi_disk *sdkp = to_scsi_disk(dev);
287
288 return snprintf(buf, 20, "%u\n", sdkp->ATO);
289}
290
291static ssize_t
292sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr,
293 char *buf)
294{
295 struct scsi_disk *sdkp = to_scsi_disk(dev);
296
297 return snprintf(buf, 20, "%u\n", sdkp->thin_provisioning);
298}
299
300static struct device_attribute sd_disk_attrs[] = {
301 __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type,
302 sd_store_cache_type),
303 __ATTR(FUA, S_IRUGO, sd_show_fua, NULL),
304 __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart,
305 sd_store_allow_restart),
306 __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop,
307 sd_store_manage_start_stop),
308 __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL),
309 __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL),
310 __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL),
311 __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL),
312 __ATTR_NULL,
313};
314
315static struct class sd_disk_class = {
316 .name = "scsi_disk",
317 .owner = THIS_MODULE,
318 .dev_release = scsi_disk_release,
319 .dev_attrs = sd_disk_attrs,
320};
321
322static struct scsi_driver sd_template = {
323 .owner = THIS_MODULE,
324 .gendrv = {
325 .name = "sd",
326 .probe = sd_probe,
327 .remove = sd_remove,
328 .suspend = sd_suspend,
329 .resume = sd_resume,
330 .shutdown = sd_shutdown,
331 },
332 .rescan = sd_rescan,
333 .done = sd_done,
334};
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350static int sd_major(int major_idx)
351{
352 switch (major_idx) {
353 case 0:
354 return SCSI_DISK0_MAJOR;
355 case 1 ... 7:
356 return SCSI_DISK1_MAJOR + major_idx - 1;
357 case 8 ... 15:
358 return SCSI_DISK8_MAJOR + major_idx - 8;
359 default:
360 BUG();
361 return 0;
362 }
363}
364
365static struct scsi_disk *__scsi_disk_get(struct gendisk *disk)
366{
367 struct scsi_disk *sdkp = NULL;
368
369 if (disk->private_data) {
370 sdkp = scsi_disk(disk);
371 if (scsi_device_get(sdkp->device) == 0)
372 get_device(&sdkp->dev);
373 else
374 sdkp = NULL;
375 }
376 return sdkp;
377}
378
379static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
380{
381 struct scsi_disk *sdkp;
382
383 mutex_lock(&sd_ref_mutex);
384 sdkp = __scsi_disk_get(disk);
385 mutex_unlock(&sd_ref_mutex);
386 return sdkp;
387}
388
389static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev)
390{
391 struct scsi_disk *sdkp;
392
393 mutex_lock(&sd_ref_mutex);
394 sdkp = dev_get_drvdata(dev);
395 if (sdkp)
396 sdkp = __scsi_disk_get(sdkp->disk);
397 mutex_unlock(&sd_ref_mutex);
398 return sdkp;
399}
400
401static void scsi_disk_put(struct scsi_disk *sdkp)
402{
403 struct scsi_device *sdev = sdkp->device;
404
405 mutex_lock(&sd_ref_mutex);
406 put_device(&sdkp->dev);
407 scsi_device_put(sdev);
408 mutex_unlock(&sd_ref_mutex);
409}
410
411static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif)
412{
413 unsigned int prot_op = SCSI_PROT_NORMAL;
414 unsigned int dix = scsi_prot_sg_count(scmd);
415
416 if (scmd->sc_data_direction == DMA_FROM_DEVICE) {
417 if (dif && dix)
418 prot_op = SCSI_PROT_READ_PASS;
419 else if (dif && !dix)
420 prot_op = SCSI_PROT_READ_STRIP;
421 else if (!dif && dix)
422 prot_op = SCSI_PROT_READ_INSERT;
423 } else {
424 if (dif && dix)
425 prot_op = SCSI_PROT_WRITE_PASS;
426 else if (dif && !dix)
427 prot_op = SCSI_PROT_WRITE_INSERT;
428 else if (!dif && dix)
429 prot_op = SCSI_PROT_WRITE_STRIP;
430 }
431
432 scsi_set_prot_op(scmd, prot_op);
433 scsi_set_prot_type(scmd, dif);
434}
435
436
437
438
439
440
441
442
443
444static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
445{
446 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
447 struct bio *bio = rq->bio;
448 sector_t sector = bio->bi_sector;
449 unsigned int nr_sectors = bio_sectors(bio);
450 unsigned int len;
451 int ret;
452 struct page *page;
453
454 if (sdkp->device->sector_size == 4096) {
455 sector >>= 3;
456 nr_sectors >>= 3;
457 }
458
459 rq->timeout = SD_TIMEOUT;
460
461 memset(rq->cmd, 0, rq->cmd_len);
462
463 page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
464 if (!page)
465 return BLKPREP_DEFER;
466
467 if (sdkp->unmap) {
468 char *buf = page_address(page);
469
470 rq->cmd_len = 10;
471 rq->cmd[0] = UNMAP;
472 rq->cmd[8] = 24;
473
474 put_unaligned_be16(6 + 16, &buf[0]);
475 put_unaligned_be16(16, &buf[2]);
476 put_unaligned_be64(sector, &buf[8]);
477 put_unaligned_be32(nr_sectors, &buf[16]);
478
479 len = 24;
480 } else {
481 rq->cmd_len = 16;
482 rq->cmd[0] = WRITE_SAME_16;
483 rq->cmd[1] = 0x8;
484 put_unaligned_be64(sector, &rq->cmd[2]);
485 put_unaligned_be32(nr_sectors, &rq->cmd[10]);
486
487 len = sdkp->device->sector_size;
488 }
489
490 blk_add_request_payload(rq, page, len);
491 ret = scsi_setup_blk_pc_cmnd(sdp, rq);
492 rq->buffer = page_address(page);
493 if (ret != BLKPREP_OK) {
494 __free_page(page);
495 rq->buffer = NULL;
496 }
497 return ret;
498}
499
500static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq)
501{
502 rq->timeout = SD_FLUSH_TIMEOUT;
503 rq->retries = SD_MAX_RETRIES;
504 rq->cmd[0] = SYNCHRONIZE_CACHE;
505 rq->cmd_len = 10;
506
507 return scsi_setup_blk_pc_cmnd(sdp, rq);
508}
509
510static void sd_unprep_fn(struct request_queue *q, struct request *rq)
511{
512 if (rq->cmd_flags & REQ_DISCARD) {
513 free_page((unsigned long)rq->buffer);
514 rq->buffer = NULL;
515 }
516}
517
518
519
520
521
522
523
524
525
526static int sd_prep_fn(struct request_queue *q, struct request *rq)
527{
528 struct scsi_cmnd *SCpnt;
529 struct scsi_device *sdp = q->queuedata;
530 struct gendisk *disk = rq->rq_disk;
531 struct scsi_disk *sdkp;
532 sector_t block = blk_rq_pos(rq);
533 sector_t threshold;
534 unsigned int this_count = blk_rq_sectors(rq);
535 int ret, host_dif;
536 unsigned char protect;
537
538
539
540
541
542 if (rq->cmd_flags & REQ_DISCARD) {
543 ret = scsi_setup_discard_cmnd(sdp, rq);
544 goto out;
545 } else if (rq->cmd_flags & REQ_FLUSH) {
546 ret = scsi_setup_flush_cmnd(sdp, rq);
547 goto out;
548 } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
549 ret = scsi_setup_blk_pc_cmnd(sdp, rq);
550 goto out;
551 } else if (rq->cmd_type != REQ_TYPE_FS) {
552 ret = BLKPREP_KILL;
553 goto out;
554 }
555 ret = scsi_setup_fs_cmnd(sdp, rq);
556 if (ret != BLKPREP_OK)
557 goto out;
558 SCpnt = rq->special;
559 sdkp = scsi_disk(disk);
560
561
562
563 ret = BLKPREP_KILL;
564
565 SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt,
566 "sd_init_command: block=%llu, "
567 "count=%d\n",
568 (unsigned long long)block,
569 this_count));
570
571 if (!sdp || !scsi_device_online(sdp) ||
572 block + blk_rq_sectors(rq) > get_capacity(disk)) {
573 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
574 "Finishing %u sectors\n",
575 blk_rq_sectors(rq)));
576 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
577 "Retry with 0x%p\n", SCpnt));
578 goto out;
579 }
580
581 if (sdp->changed) {
582
583
584
585
586
587 goto out;
588 }
589
590
591
592
593
594 threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS *
595 (sdp->sector_size / 512);
596
597 if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) {
598 if (block < threshold) {
599
600 this_count = threshold - block;
601 } else {
602
603 this_count = sdp->sector_size / 512;
604 }
605 }
606
607 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n",
608 (unsigned long long)block));
609
610
611
612
613
614
615
616
617
618
619
620
621 if (sdp->sector_size == 1024) {
622 if ((block & 1) || (blk_rq_sectors(rq) & 1)) {
623 scmd_printk(KERN_ERR, SCpnt,
624 "Bad block number requested\n");
625 goto out;
626 } else {
627 block = block >> 1;
628 this_count = this_count >> 1;
629 }
630 }
631 if (sdp->sector_size == 2048) {
632 if ((block & 3) || (blk_rq_sectors(rq) & 3)) {
633 scmd_printk(KERN_ERR, SCpnt,
634 "Bad block number requested\n");
635 goto out;
636 } else {
637 block = block >> 2;
638 this_count = this_count >> 2;
639 }
640 }
641 if (sdp->sector_size == 4096) {
642 if ((block & 7) || (blk_rq_sectors(rq) & 7)) {
643 scmd_printk(KERN_ERR, SCpnt,
644 "Bad block number requested\n");
645 goto out;
646 } else {
647 block = block >> 3;
648 this_count = this_count >> 3;
649 }
650 }
651 if (rq_data_dir(rq) == WRITE) {
652 if (!sdp->writeable) {
653 goto out;
654 }
655 SCpnt->cmnd[0] = WRITE_6;
656 SCpnt->sc_data_direction = DMA_TO_DEVICE;
657
658 if (blk_integrity_rq(rq) &&
659 sd_dif_prepare(rq, block, sdp->sector_size) == -EIO)
660 goto out;
661
662 } else if (rq_data_dir(rq) == READ) {
663 SCpnt->cmnd[0] = READ_6;
664 SCpnt->sc_data_direction = DMA_FROM_DEVICE;
665 } else {
666 scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags);
667 goto out;
668 }
669
670 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
671 "%s %d/%u 512 byte blocks.\n",
672 (rq_data_dir(rq) == WRITE) ?
673 "writing" : "reading", this_count,
674 blk_rq_sectors(rq)));
675
676
677 host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
678 if (host_dif)
679 protect = 1 << 5;
680 else
681 protect = 0;
682
683 if (host_dif == SD_DIF_TYPE2_PROTECTION) {
684 SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
685
686 if (unlikely(SCpnt->cmnd == NULL)) {
687 ret = BLKPREP_DEFER;
688 goto out;
689 }
690
691 SCpnt->cmd_len = SD_EXT_CDB_SIZE;
692 memset(SCpnt->cmnd, 0, SCpnt->cmd_len);
693 SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD;
694 SCpnt->cmnd[7] = 0x18;
695 SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32;
696 SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
697
698
699 SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
700 SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
701 SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
702 SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
703 SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff;
704 SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff;
705 SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff;
706 SCpnt->cmnd[19] = (unsigned char) block & 0xff;
707
708
709 SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff;
710 SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff;
711 SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff;
712 SCpnt->cmnd[23] = (unsigned char) block & 0xff;
713
714
715 SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff;
716 SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff;
717 SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff;
718 SCpnt->cmnd[31] = (unsigned char) this_count & 0xff;
719 } else if (block > 0xffffffff) {
720 SCpnt->cmnd[0] += READ_16 - READ_6;
721 SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
722 SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
723 SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
724 SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
725 SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
726 SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff;
727 SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff;
728 SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff;
729 SCpnt->cmnd[9] = (unsigned char) block & 0xff;
730 SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff;
731 SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff;
732 SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff;
733 SCpnt->cmnd[13] = (unsigned char) this_count & 0xff;
734 SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0;
735 } else if ((this_count > 0xff) || (block > 0x1fffff) ||
736 scsi_device_protection(SCpnt->device) ||
737 SCpnt->device->use_10_for_rw) {
738 if (this_count > 0xffff)
739 this_count = 0xffff;
740
741 SCpnt->cmnd[0] += READ_10 - READ_6;
742 SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
743 SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
744 SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
745 SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
746 SCpnt->cmnd[5] = (unsigned char) block & 0xff;
747 SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0;
748 SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
749 SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
750 } else {
751 if (unlikely(rq->cmd_flags & REQ_FUA)) {
752
753
754
755
756
757
758 scmd_printk(KERN_ERR, SCpnt,
759 "FUA write on READ/WRITE(6) drive\n");
760 goto out;
761 }
762
763 SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f);
764 SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff);
765 SCpnt->cmnd[3] = (unsigned char) block & 0xff;
766 SCpnt->cmnd[4] = (unsigned char) this_count;
767 SCpnt->cmnd[5] = 0;
768 }
769 SCpnt->sdb.length = this_count * sdp->sector_size;
770
771
772 if (host_dif || scsi_prot_sg_count(SCpnt))
773 sd_prot_op(SCpnt, host_dif);
774
775
776
777
778
779
780 SCpnt->transfersize = sdp->sector_size;
781 SCpnt->underflow = this_count << 9;
782 SCpnt->allowed = SD_MAX_RETRIES;
783
784
785
786
787
788 ret = BLKPREP_OK;
789 out:
790 return scsi_prep_return(q, rq, ret);
791}
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808static int sd_open(struct block_device *bdev, fmode_t mode)
809{
810 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
811 struct scsi_device *sdev;
812 int retval;
813
814 if (!sdkp)
815 return -ENXIO;
816
817 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
818
819 sdev = sdkp->device;
820
821 retval = scsi_autopm_get_device(sdev);
822 if (retval)
823 goto error_autopm;
824
825
826
827
828
829 retval = -ENXIO;
830 if (!scsi_block_when_processing_errors(sdev))
831 goto error_out;
832
833 if (sdev->removable || sdkp->write_prot)
834 check_disk_change(bdev);
835
836
837
838
839 retval = -ENOMEDIUM;
840 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
841 goto error_out;
842
843
844
845
846
847 retval = -EROFS;
848 if (sdkp->write_prot && (mode & FMODE_WRITE))
849 goto error_out;
850
851
852
853
854
855
856
857 retval = -ENXIO;
858 if (!scsi_device_online(sdev))
859 goto error_out;
860
861 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
862 if (scsi_block_when_processing_errors(sdev))
863 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
864 }
865
866 return 0;
867
868error_out:
869 scsi_autopm_put_device(sdev);
870error_autopm:
871 scsi_disk_put(sdkp);
872 return retval;
873}
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888static int sd_release(struct gendisk *disk, fmode_t mode)
889{
890 struct scsi_disk *sdkp = scsi_disk(disk);
891 struct scsi_device *sdev = sdkp->device;
892
893 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
894
895 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
896 if (scsi_block_when_processing_errors(sdev))
897 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
898 }
899
900
901
902
903
904
905 scsi_autopm_put_device(sdev);
906 scsi_disk_put(sdkp);
907 return 0;
908}
909
910static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
911{
912 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
913 struct scsi_device *sdp = sdkp->device;
914 struct Scsi_Host *host = sdp->host;
915 int diskinfo[4];
916
917
918 diskinfo[0] = 0x40;
919 diskinfo[1] = 0x20;
920 diskinfo[2] = sdkp->capacity >> 11;
921
922
923 if (host->hostt->bios_param)
924 host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo);
925 else
926 scsicam_bios_param(bdev, sdkp->capacity, diskinfo);
927
928 geo->heads = diskinfo[0];
929 geo->sectors = diskinfo[1];
930 geo->cylinders = diskinfo[2];
931 return 0;
932}
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948static int sd_ioctl(struct block_device *bdev, fmode_t mode,
949 unsigned int cmd, unsigned long arg)
950{
951 struct gendisk *disk = bdev->bd_disk;
952 struct scsi_device *sdp = scsi_disk(disk)->device;
953 void __user *p = (void __user *)arg;
954 int error;
955
956 SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n",
957 disk->disk_name, cmd));
958
959
960
961
962
963
964
965 error = scsi_nonblockable_ioctl(sdp, cmd, p,
966 (mode & FMODE_NDELAY) != 0);
967 if (!scsi_block_when_processing_errors(sdp) || !error)
968 goto out;
969
970
971
972
973
974
975 switch (cmd) {
976 case SCSI_IOCTL_GET_IDLUN:
977 case SCSI_IOCTL_GET_BUS_NUMBER:
978 error = scsi_ioctl(sdp, cmd, p);
979 break;
980 default:
981 error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
982 if (error != -ENOTTY)
983 break;
984 error = scsi_ioctl(sdp, cmd, p);
985 break;
986 }
987out:
988 return error;
989}
990
991static void set_media_not_present(struct scsi_disk *sdkp)
992{
993 if (sdkp->media_present)
994 sdkp->device->changed = 1;
995
996 if (sdkp->device->removable) {
997 sdkp->media_present = 0;
998 sdkp->capacity = 0;
999 }
1000}
1001
1002static int media_not_present(struct scsi_disk *sdkp,
1003 struct scsi_sense_hdr *sshdr)
1004{
1005 if (!scsi_sense_valid(sshdr))
1006 return 0;
1007
1008
1009 switch (sshdr->sense_key) {
1010 case UNIT_ATTENTION:
1011 case NOT_READY:
1012
1013 if (sshdr->asc == 0x3A) {
1014 set_media_not_present(sdkp);
1015 return 1;
1016 }
1017 }
1018 return 0;
1019}
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1031{
1032 struct scsi_disk *sdkp = scsi_disk(disk);
1033 struct scsi_device *sdp = sdkp->device;
1034 struct scsi_sense_hdr *sshdr = NULL;
1035 int retval;
1036
1037 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1038
1039
1040
1041
1042
1043
1044
1045 if (!scsi_device_online(sdp)) {
1046 set_media_not_present(sdkp);
1047 goto out;
1048 }
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059 retval = -ENODEV;
1060
1061 if (scsi_block_when_processing_errors(sdp)) {
1062 sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL);
1063 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
1064 sshdr);
1065 }
1066
1067
1068 if (host_byte(retval)) {
1069 set_media_not_present(sdkp);
1070 goto out;
1071 }
1072
1073 if (media_not_present(sdkp, sshdr))
1074 goto out;
1075
1076
1077
1078
1079
1080 if (!sdkp->media_present)
1081 sdp->changed = 1;
1082 sdkp->media_present = 1;
1083out:
1084
1085
1086
1087
1088
1089
1090 kfree(sshdr);
1091 retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1092 sdp->changed = 0;
1093 return retval;
1094}
1095
1096static int sd_sync_cache(struct scsi_disk *sdkp)
1097{
1098 int retries, res;
1099 struct scsi_device *sdp = sdkp->device;
1100 struct scsi_sense_hdr sshdr;
1101
1102 if (!scsi_device_online(sdp))
1103 return -ENODEV;
1104
1105
1106 for (retries = 3; retries > 0; --retries) {
1107 unsigned char cmd[10] = { 0 };
1108
1109 cmd[0] = SYNCHRONIZE_CACHE;
1110
1111
1112
1113
1114 res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
1115 SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL);
1116 if (res == 0)
1117 break;
1118 }
1119
1120 if (res) {
1121 sd_print_result(sdkp, res);
1122 if (driver_byte(res) & DRIVER_SENSE)
1123 sd_print_sense_hdr(sdkp, &sshdr);
1124 }
1125
1126 if (res)
1127 return -EIO;
1128 return 0;
1129}
1130
1131static void sd_rescan(struct device *dev)
1132{
1133 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
1134
1135 if (sdkp) {
1136 revalidate_disk(sdkp->disk);
1137 scsi_disk_put(sdkp);
1138 }
1139}
1140
1141
1142#ifdef CONFIG_COMPAT
1143
1144
1145
1146
1147static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1148 unsigned int cmd, unsigned long arg)
1149{
1150 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
1151
1152
1153
1154
1155
1156
1157
1158 if (!scsi_block_when_processing_errors(sdev))
1159 return -ENODEV;
1160
1161 if (sdev->host->hostt->compat_ioctl) {
1162 int ret;
1163
1164 ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
1165
1166 return ret;
1167 }
1168
1169
1170
1171
1172 return -ENOIOCTLCMD;
1173}
1174#endif
1175
1176static const struct block_device_operations sd_fops = {
1177 .owner = THIS_MODULE,
1178 .open = sd_open,
1179 .release = sd_release,
1180 .ioctl = sd_ioctl,
1181 .getgeo = sd_getgeo,
1182#ifdef CONFIG_COMPAT
1183 .compat_ioctl = sd_compat_ioctl,
1184#endif
1185 .check_events = sd_check_events,
1186 .revalidate_disk = sd_revalidate_disk,
1187 .unlock_native_capacity = sd_unlock_native_capacity,
1188};
1189
1190static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1191{
1192 u64 start_lba = blk_rq_pos(scmd->request);
1193 u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512);
1194 u64 bad_lba;
1195 int info_valid;
1196
1197
1198
1199
1200 unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
1201 unsigned int good_bytes;
1202
1203 if (scmd->request->cmd_type != REQ_TYPE_FS)
1204 return 0;
1205
1206 info_valid = scsi_get_sense_info_fld(scmd->sense_buffer,
1207 SCSI_SENSE_BUFFERSIZE,
1208 &bad_lba);
1209 if (!info_valid)
1210 return 0;
1211
1212 if (scsi_bufflen(scmd) <= scmd->device->sector_size)
1213 return 0;
1214
1215 if (scmd->device->sector_size < 512) {
1216
1217 start_lba <<= 1;
1218 end_lba <<= 1;
1219 } else {
1220
1221 u64 factor = scmd->device->sector_size / 512;
1222 do_div(start_lba, factor);
1223 do_div(end_lba, factor);
1224 }
1225
1226
1227
1228
1229 if (bad_lba < start_lba || bad_lba >= end_lba)
1230 return 0;
1231
1232
1233
1234
1235 good_bytes = (bad_lba - start_lba) * scmd->device->sector_size;
1236 return min(good_bytes, transferred);
1237}
1238
1239
1240
1241
1242
1243
1244
1245
1246static int sd_done(struct scsi_cmnd *SCpnt)
1247{
1248 int result = SCpnt->result;
1249 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
1250 struct scsi_sense_hdr sshdr;
1251 struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
1252 int sense_valid = 0;
1253 int sense_deferred = 0;
1254
1255 if (SCpnt->request->cmd_flags & REQ_DISCARD) {
1256 if (!result)
1257 scsi_set_resid(SCpnt, 0);
1258 return good_bytes;
1259 }
1260
1261 if (result) {
1262 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
1263 if (sense_valid)
1264 sense_deferred = scsi_sense_is_deferred(&sshdr);
1265 }
1266#ifdef CONFIG_SCSI_LOGGING
1267 SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt));
1268 if (sense_valid) {
1269 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
1270 "sd_done: sb[respc,sk,asc,"
1271 "ascq]=%x,%x,%x,%x\n",
1272 sshdr.response_code,
1273 sshdr.sense_key, sshdr.asc,
1274 sshdr.ascq));
1275 }
1276#endif
1277 if (driver_byte(result) != DRIVER_SENSE &&
1278 (!sense_valid || sense_deferred))
1279 goto out;
1280
1281 switch (sshdr.sense_key) {
1282 case HARDWARE_ERROR:
1283 case MEDIUM_ERROR:
1284 good_bytes = sd_completed_bytes(SCpnt);
1285 break;
1286 case RECOVERED_ERROR:
1287 good_bytes = scsi_bufflen(SCpnt);
1288 break;
1289 case NO_SENSE:
1290
1291
1292
1293
1294 scsi_print_sense("sd", SCpnt);
1295 SCpnt->result = 0;
1296 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1297 break;
1298 case ABORTED_COMMAND:
1299 case ILLEGAL_REQUEST:
1300 if (sshdr.asc == 0x10)
1301 good_bytes = sd_completed_bytes(SCpnt);
1302 break;
1303 default:
1304 break;
1305 }
1306 out:
1307 if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt))
1308 sd_dif_complete(SCpnt, good_bytes);
1309
1310 if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type)
1311 == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) {
1312
1313
1314
1315
1316
1317 if (result)
1318 scsi_print_command(SCpnt);
1319
1320 mempool_free(SCpnt->cmnd, sd_cdb_pool);
1321 SCpnt->cmnd = NULL;
1322 SCpnt->cmd_len = 0;
1323 }
1324
1325 return good_bytes;
1326}
1327
1328
1329
1330
1331static void
1332sd_spinup_disk(struct scsi_disk *sdkp)
1333{
1334 unsigned char cmd[10];
1335 unsigned long spintime_expire = 0;
1336 int retries, spintime;
1337 unsigned int the_result;
1338 struct scsi_sense_hdr sshdr;
1339 int sense_valid = 0;
1340
1341 spintime = 0;
1342
1343
1344
1345 do {
1346 retries = 0;
1347
1348 do {
1349 cmd[0] = TEST_UNIT_READY;
1350 memset((void *) &cmd[1], 0, 9);
1351
1352 the_result = scsi_execute_req(sdkp->device, cmd,
1353 DMA_NONE, NULL, 0,
1354 &sshdr, SD_TIMEOUT,
1355 SD_MAX_RETRIES, NULL);
1356
1357
1358
1359
1360
1361
1362 if (media_not_present(sdkp, &sshdr))
1363 return;
1364
1365 if (the_result)
1366 sense_valid = scsi_sense_valid(&sshdr);
1367 retries++;
1368 } while (retries < 3 &&
1369 (!scsi_status_is_good(the_result) ||
1370 ((driver_byte(the_result) & DRIVER_SENSE) &&
1371 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
1372
1373 if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
1374
1375
1376 if(!spintime && !scsi_status_is_good(the_result)) {
1377 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
1378 sd_print_result(sdkp, the_result);
1379 }
1380 break;
1381 }
1382
1383
1384
1385
1386 if (sdkp->device->no_start_on_add)
1387 break;
1388
1389 if (sense_valid && sshdr.sense_key == NOT_READY) {
1390 if (sshdr.asc == 4 && sshdr.ascq == 3)
1391 break;
1392 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
1393 break;
1394 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
1395 break;
1396
1397
1398
1399 if (!spintime) {
1400 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1401 cmd[0] = START_STOP;
1402 cmd[1] = 1;
1403 memset((void *) &cmd[2], 0, 8);
1404 cmd[4] = 1;
1405 if (sdkp->device->start_stop_pwr_cond)
1406 cmd[4] |= 1 << 4;
1407 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
1408 NULL, 0, &sshdr,
1409 SD_TIMEOUT, SD_MAX_RETRIES,
1410 NULL);
1411 spintime_expire = jiffies + 100 * HZ;
1412 spintime = 1;
1413 }
1414
1415 msleep(1000);
1416 printk(".");
1417
1418
1419
1420
1421
1422
1423 } else if (sense_valid &&
1424 sshdr.sense_key == UNIT_ATTENTION &&
1425 sshdr.asc == 0x28) {
1426 if (!spintime) {
1427 spintime_expire = jiffies + 5 * HZ;
1428 spintime = 1;
1429 }
1430
1431 msleep(1000);
1432 } else {
1433
1434
1435 if(!spintime) {
1436 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
1437 sd_print_sense_hdr(sdkp, &sshdr);
1438 }
1439 break;
1440 }
1441
1442 } while (spintime && time_before_eq(jiffies, spintime_expire));
1443
1444 if (spintime) {
1445 if (scsi_status_is_good(the_result))
1446 printk("ready\n");
1447 else
1448 printk("not responding...\n");
1449 }
1450}
1451
1452
1453
1454
1455
1456static void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
1457{
1458 struct scsi_device *sdp = sdkp->device;
1459 u8 type;
1460
1461 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
1462 return;
1463
1464 type = ((buffer[12] >> 1) & 7) + 1;
1465
1466 if (type == sdkp->protection_type || !sdkp->first_scan)
1467 return;
1468
1469 sdkp->protection_type = type;
1470
1471 if (type > SD_DIF_TYPE3_PROTECTION) {
1472 sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \
1473 "protection type %u. Disabling disk!\n", type);
1474 sdkp->capacity = 0;
1475 return;
1476 }
1477
1478 if (scsi_host_dif_capable(sdp->host, type))
1479 sd_printk(KERN_NOTICE, sdkp,
1480 "Enabling DIF Type %u protection\n", type);
1481 else
1482 sd_printk(KERN_NOTICE, sdkp,
1483 "Disabling DIF Type %u protection\n", type);
1484}
1485
1486static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
1487 struct scsi_sense_hdr *sshdr, int sense_valid,
1488 int the_result)
1489{
1490 sd_print_result(sdkp, the_result);
1491 if (driver_byte(the_result) & DRIVER_SENSE)
1492 sd_print_sense_hdr(sdkp, sshdr);
1493 else
1494 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
1495
1496
1497
1498
1499
1500 if (sdp->removable &&
1501 sense_valid && sshdr->sense_key == NOT_READY)
1502 set_media_not_present(sdkp);
1503
1504
1505
1506
1507
1508
1509 sdkp->capacity = 0;
1510}
1511
1512#define RC16_LEN 32
1513#if RC16_LEN > SD_BUF_SIZE
1514#error RC16_LEN must not be more than SD_BUF_SIZE
1515#endif
1516
1517#define READ_CAPACITY_RETRIES_ON_RESET 10
1518
1519static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
1520 unsigned char *buffer)
1521{
1522 unsigned char cmd[16];
1523 struct scsi_sense_hdr sshdr;
1524 int sense_valid = 0;
1525 int the_result;
1526 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
1527 unsigned int alignment;
1528 unsigned long long lba;
1529 unsigned sector_size;
1530
1531 if (sdp->no_read_capacity_16)
1532 return -EINVAL;
1533
1534 do {
1535 memset(cmd, 0, 16);
1536 cmd[0] = SERVICE_ACTION_IN;
1537 cmd[1] = SAI_READ_CAPACITY_16;
1538 cmd[13] = RC16_LEN;
1539 memset(buffer, 0, RC16_LEN);
1540
1541 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
1542 buffer, RC16_LEN, &sshdr,
1543 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1544
1545 if (media_not_present(sdkp, &sshdr))
1546 return -ENODEV;
1547
1548 if (the_result) {
1549 sense_valid = scsi_sense_valid(&sshdr);
1550 if (sense_valid &&
1551 sshdr.sense_key == ILLEGAL_REQUEST &&
1552 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
1553 sshdr.ascq == 0x00)
1554
1555
1556
1557 return -EINVAL;
1558 if (sense_valid &&
1559 sshdr.sense_key == UNIT_ATTENTION &&
1560 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
1561
1562
1563 if (--reset_retries > 0)
1564 continue;
1565 }
1566 retries--;
1567
1568 } while (the_result && retries);
1569
1570 if (the_result) {
1571 sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n");
1572 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
1573 return -EINVAL;
1574 }
1575
1576 sector_size = get_unaligned_be32(&buffer[8]);
1577 lba = get_unaligned_be64(&buffer[0]);
1578
1579 sd_read_protection_type(sdkp, buffer);
1580
1581 if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) {
1582 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
1583 "kernel compiled with support for large block "
1584 "devices.\n");
1585 sdkp->capacity = 0;
1586 return -EOVERFLOW;
1587 }
1588
1589
1590 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
1591
1592
1593 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
1594 blk_queue_alignment_offset(sdp->request_queue, alignment);
1595 if (alignment && sdkp->first_scan)
1596 sd_printk(KERN_NOTICE, sdkp,
1597 "physical block alignment offset: %u\n", alignment);
1598
1599 if (buffer[14] & 0x80) {
1600 struct request_queue *q = sdp->request_queue;
1601
1602 sdkp->thin_provisioning = 1;
1603 q->limits.discard_granularity = sdkp->physical_block_size;
1604 q->limits.max_discard_sectors = 0xffffffff;
1605
1606 if (buffer[14] & 0x40)
1607 q->limits.discard_zeroes_data = 1;
1608
1609 queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
1610 }
1611
1612 sdkp->capacity = lba + 1;
1613 return sector_size;
1614}
1615
1616static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
1617 unsigned char *buffer)
1618{
1619 unsigned char cmd[16];
1620 struct scsi_sense_hdr sshdr;
1621 int sense_valid = 0;
1622 int the_result;
1623 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
1624 sector_t lba;
1625 unsigned sector_size;
1626
1627 do {
1628 cmd[0] = READ_CAPACITY;
1629 memset(&cmd[1], 0, 9);
1630 memset(buffer, 0, 8);
1631
1632 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
1633 buffer, 8, &sshdr,
1634 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1635
1636 if (media_not_present(sdkp, &sshdr))
1637 return -ENODEV;
1638
1639 if (the_result) {
1640 sense_valid = scsi_sense_valid(&sshdr);
1641 if (sense_valid &&
1642 sshdr.sense_key == UNIT_ATTENTION &&
1643 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
1644
1645
1646 if (--reset_retries > 0)
1647 continue;
1648 }
1649 retries--;
1650
1651 } while (the_result && retries);
1652
1653 if (the_result) {
1654 sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n");
1655 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
1656 return -EINVAL;
1657 }
1658
1659 sector_size = get_unaligned_be32(&buffer[4]);
1660 lba = get_unaligned_be32(&buffer[0]);
1661
1662 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
1663
1664
1665
1666 sdkp->capacity = 0;
1667 sdkp->physical_block_size = sector_size;
1668 return sector_size;
1669 }
1670
1671 if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) {
1672 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
1673 "kernel compiled with support for large block "
1674 "devices.\n");
1675 sdkp->capacity = 0;
1676 return -EOVERFLOW;
1677 }
1678
1679 sdkp->capacity = lba + 1;
1680 sdkp->physical_block_size = sector_size;
1681 return sector_size;
1682}
1683
1684static int sd_try_rc16_first(struct scsi_device *sdp)
1685{
1686 if (sdp->host->max_cmd_len < 16)
1687 return 0;
1688 if (sdp->scsi_level > SCSI_SPC_2)
1689 return 1;
1690 if (scsi_device_protection(sdp))
1691 return 1;
1692 return 0;
1693}
1694
1695
1696
1697
1698static void
1699sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
1700{
1701 int sector_size;
1702 struct scsi_device *sdp = sdkp->device;
1703 sector_t old_capacity = sdkp->capacity;
1704
1705 if (sd_try_rc16_first(sdp)) {
1706 sector_size = read_capacity_16(sdkp, sdp, buffer);
1707 if (sector_size == -EOVERFLOW)
1708 goto got_data;
1709 if (sector_size == -ENODEV)
1710 return;
1711 if (sector_size < 0)
1712 sector_size = read_capacity_10(sdkp, sdp, buffer);
1713 if (sector_size < 0)
1714 return;
1715 } else {
1716 sector_size = read_capacity_10(sdkp, sdp, buffer);
1717 if (sector_size == -EOVERFLOW)
1718 goto got_data;
1719 if (sector_size < 0)
1720 return;
1721 if ((sizeof(sdkp->capacity) > 4) &&
1722 (sdkp->capacity > 0xffffffffULL)) {
1723 int old_sector_size = sector_size;
1724 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
1725 "Trying to use READ CAPACITY(16).\n");
1726 sector_size = read_capacity_16(sdkp, sdp, buffer);
1727 if (sector_size < 0) {
1728 sd_printk(KERN_NOTICE, sdkp,
1729 "Using 0xffffffff as device size\n");
1730 sdkp->capacity = 1 + (sector_t) 0xffffffff;
1731 sector_size = old_sector_size;
1732 goto got_data;
1733 }
1734 }
1735 }
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747 if (sdp->fix_capacity ||
1748 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
1749 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
1750 "from its reported value: %llu\n",
1751 (unsigned long long) sdkp->capacity);
1752 --sdkp->capacity;
1753 }
1754
1755got_data:
1756 if (sector_size == 0) {
1757 sector_size = 512;
1758 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
1759 "assuming 512.\n");
1760 }
1761
1762 if (sector_size != 512 &&
1763 sector_size != 1024 &&
1764 sector_size != 2048 &&
1765 sector_size != 4096 &&
1766 sector_size != 256) {
1767 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
1768 sector_size);
1769
1770
1771
1772
1773
1774
1775 sdkp->capacity = 0;
1776
1777
1778
1779
1780
1781
1782 sector_size = 512;
1783 }
1784 blk_queue_logical_block_size(sdp->request_queue, sector_size);
1785
1786 {
1787 char cap_str_2[10], cap_str_10[10];
1788 u64 sz = (u64)sdkp->capacity << ilog2(sector_size);
1789
1790 string_get_size(sz, STRING_UNITS_2, cap_str_2,
1791 sizeof(cap_str_2));
1792 string_get_size(sz, STRING_UNITS_10, cap_str_10,
1793 sizeof(cap_str_10));
1794
1795 if (sdkp->first_scan || old_capacity != sdkp->capacity) {
1796 sd_printk(KERN_NOTICE, sdkp,
1797 "%llu %d-byte logical blocks: (%s/%s)\n",
1798 (unsigned long long)sdkp->capacity,
1799 sector_size, cap_str_10, cap_str_2);
1800
1801 if (sdkp->physical_block_size != sector_size)
1802 sd_printk(KERN_NOTICE, sdkp,
1803 "%u-byte physical blocks\n",
1804 sdkp->physical_block_size);
1805 }
1806 }
1807
1808
1809 if (sector_size == 4096)
1810 sdkp->capacity <<= 3;
1811 else if (sector_size == 2048)
1812 sdkp->capacity <<= 2;
1813 else if (sector_size == 1024)
1814 sdkp->capacity <<= 1;
1815 else if (sector_size == 256)
1816 sdkp->capacity >>= 1;
1817
1818 blk_queue_physical_block_size(sdp->request_queue,
1819 sdkp->physical_block_size);
1820 sdkp->device->sector_size = sector_size;
1821}
1822
1823
1824static inline int
1825sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
1826 unsigned char *buffer, int len, struct scsi_mode_data *data,
1827 struct scsi_sense_hdr *sshdr)
1828{
1829 return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
1830 SD_TIMEOUT, SD_MAX_RETRIES, data,
1831 sshdr);
1832}
1833
1834
1835
1836
1837
1838static void
1839sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
1840{
1841 int res;
1842 struct scsi_device *sdp = sdkp->device;
1843 struct scsi_mode_data data;
1844 int old_wp = sdkp->write_prot;
1845
1846 set_disk_ro(sdkp->disk, 0);
1847 if (sdp->skip_ms_page_3f) {
1848 sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1849 return;
1850 }
1851
1852 if (sdp->use_192_bytes_for_3f) {
1853 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
1854 } else {
1855
1856
1857
1858
1859
1860 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
1861
1862
1863
1864
1865
1866
1867
1868 if (!scsi_status_is_good(res))
1869 res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
1870
1871
1872
1873
1874 if (!scsi_status_is_good(res))
1875 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
1876 &data, NULL);
1877 }
1878
1879 if (!scsi_status_is_good(res)) {
1880 sd_printk(KERN_WARNING, sdkp,
1881 "Test WP failed, assume Write Enabled\n");
1882 } else {
1883 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
1884 set_disk_ro(sdkp->disk, sdkp->write_prot);
1885 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
1886 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
1887 sdkp->write_prot ? "on" : "off");
1888 sd_printk(KERN_DEBUG, sdkp,
1889 "Mode Sense: %02x %02x %02x %02x\n",
1890 buffer[0], buffer[1], buffer[2], buffer[3]);
1891 }
1892 }
1893}
1894
1895
1896
1897
1898
1899static void
1900sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
1901{
1902 int len = 0, res;
1903 struct scsi_device *sdp = sdkp->device;
1904
1905 int dbd;
1906 int modepage;
1907 struct scsi_mode_data data;
1908 struct scsi_sense_hdr sshdr;
1909 int old_wce = sdkp->WCE;
1910 int old_rcd = sdkp->RCD;
1911 int old_dpofua = sdkp->DPOFUA;
1912
1913 if (sdp->skip_ms_page_8) {
1914 if (sdp->type == TYPE_RBC)
1915 goto defaults;
1916 else {
1917 modepage = 0x3F;
1918 dbd = 0;
1919 }
1920 } else if (sdp->type == TYPE_RBC) {
1921 modepage = 6;
1922 dbd = 8;
1923 } else {
1924 modepage = 8;
1925 dbd = 0;
1926 }
1927
1928
1929 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr);
1930
1931 if (!scsi_status_is_good(res))
1932 goto bad_sense;
1933
1934 if (!data.header_length) {
1935 modepage = 6;
1936 sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n");
1937 }
1938
1939
1940 len = data.length;
1941
1942
1943
1944
1945
1946 if (len < 3)
1947 goto bad_sense;
1948 else if (len > SD_BUF_SIZE) {
1949 sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
1950 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
1951 len = SD_BUF_SIZE;
1952 }
1953
1954
1955 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr);
1956
1957 if (scsi_status_is_good(res)) {
1958 int offset = data.header_length + data.block_descriptor_length;
1959
1960 while (offset < len) {
1961 u8 page_code = buffer[offset] & 0x3F;
1962 u8 spf = buffer[offset] & 0x40;
1963
1964 if (page_code == 8 || page_code == 6) {
1965
1966
1967 if (len - offset <= 2) {
1968 sd_printk(KERN_ERR, sdkp, "Incomplete "
1969 "mode parameter data\n");
1970 goto defaults;
1971 } else {
1972 modepage = page_code;
1973 goto Page_found;
1974 }
1975 } else {
1976
1977 if (spf && len - offset > 3)
1978 offset += 4 + (buffer[offset+2] << 8) +
1979 buffer[offset+3];
1980 else if (!spf && len - offset > 1)
1981 offset += 2 + buffer[offset+1];
1982 else {
1983 sd_printk(KERN_ERR, sdkp, "Incomplete "
1984 "mode parameter data\n");
1985 goto defaults;
1986 }
1987 }
1988 }
1989
1990 if (modepage == 0x3F) {
1991 sd_printk(KERN_ERR, sdkp, "No Caching mode page "
1992 "present\n");
1993 goto defaults;
1994 } else if ((buffer[offset] & 0x3f) != modepage) {
1995 sd_printk(KERN_ERR, sdkp, "Got wrong page\n");
1996 goto defaults;
1997 }
1998 Page_found:
1999 if (modepage == 8) {
2000 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2001 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2002 } else {
2003 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2004 sdkp->RCD = 0;
2005 }
2006
2007 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
2008 if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) {
2009 sd_printk(KERN_NOTICE, sdkp,
2010 "Uses READ/WRITE(6), disabling FUA\n");
2011 sdkp->DPOFUA = 0;
2012 }
2013
2014 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2015 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2016 sd_printk(KERN_NOTICE, sdkp,
2017 "Write cache: %s, read cache: %s, %s\n",
2018 sdkp->WCE ? "enabled" : "disabled",
2019 sdkp->RCD ? "disabled" : "enabled",
2020 sdkp->DPOFUA ? "supports DPO and FUA"
2021 : "doesn't support DPO or FUA");
2022
2023 return;
2024 }
2025
2026bad_sense:
2027 if (scsi_sense_valid(&sshdr) &&
2028 sshdr.sense_key == ILLEGAL_REQUEST &&
2029 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
2030
2031 sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
2032 else
2033 sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n");
2034
2035defaults:
2036 sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n");
2037 sdkp->WCE = 0;
2038 sdkp->RCD = 0;
2039 sdkp->DPOFUA = 0;
2040}
2041
2042
2043
2044
2045
2046static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
2047{
2048 int res, offset;
2049 struct scsi_device *sdp = sdkp->device;
2050 struct scsi_mode_data data;
2051 struct scsi_sense_hdr sshdr;
2052
2053 if (sdp->type != TYPE_DISK)
2054 return;
2055
2056 if (sdkp->protection_type == 0)
2057 return;
2058
2059 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
2060 SD_MAX_RETRIES, &data, &sshdr);
2061
2062 if (!scsi_status_is_good(res) || !data.header_length ||
2063 data.length < 6) {
2064 sd_printk(KERN_WARNING, sdkp,
2065 "getting Control mode page failed, assume no ATO\n");
2066
2067 if (scsi_sense_valid(&sshdr))
2068 sd_print_sense_hdr(sdkp, &sshdr);
2069
2070 return;
2071 }
2072
2073 offset = data.header_length + data.block_descriptor_length;
2074
2075 if ((buffer[offset] & 0x3f) != 0x0a) {
2076 sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
2077 return;
2078 }
2079
2080 if ((buffer[offset + 5] & 0x80) == 0)
2081 return;
2082
2083 sdkp->ATO = 1;
2084
2085 return;
2086}
2087
2088
2089
2090
2091
2092static void sd_read_block_limits(struct scsi_disk *sdkp)
2093{
2094 struct request_queue *q = sdkp->disk->queue;
2095 unsigned int sector_sz = sdkp->device->sector_size;
2096 const int vpd_len = 64;
2097 unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
2098
2099 if (!buffer ||
2100
2101 scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
2102 goto out;
2103
2104 blk_queue_io_min(sdkp->disk->queue,
2105 get_unaligned_be16(&buffer[6]) * sector_sz);
2106 blk_queue_io_opt(sdkp->disk->queue,
2107 get_unaligned_be32(&buffer[12]) * sector_sz);
2108
2109
2110 if (sdkp->thin_provisioning && buffer[3] == 0x3c) {
2111 unsigned int lba_count, desc_count, granularity;
2112
2113 lba_count = get_unaligned_be32(&buffer[20]);
2114 desc_count = get_unaligned_be32(&buffer[24]);
2115
2116 if (lba_count && desc_count) {
2117 if (sdkp->tpvpd && !sdkp->tpu)
2118 sdkp->unmap = 0;
2119 else
2120 sdkp->unmap = 1;
2121 }
2122
2123 if (sdkp->tpvpd && !sdkp->tpu && !sdkp->tpws) {
2124 sd_printk(KERN_ERR, sdkp, "Thin provisioning is " \
2125 "enabled but neither TPU, nor TPWS are " \
2126 "set. Disabling discard!\n");
2127 goto out;
2128 }
2129
2130 if (lba_count)
2131 q->limits.max_discard_sectors =
2132 lba_count * sector_sz >> 9;
2133
2134 granularity = get_unaligned_be32(&buffer[28]);
2135
2136 if (granularity)
2137 q->limits.discard_granularity = granularity * sector_sz;
2138
2139 if (buffer[32] & 0x80)
2140 q->limits.discard_alignment =
2141 get_unaligned_be32(&buffer[32]) & ~(1 << 31);
2142 }
2143
2144 out:
2145 kfree(buffer);
2146}
2147
2148
2149
2150
2151
2152static void sd_read_block_characteristics(struct scsi_disk *sdkp)
2153{
2154 unsigned char *buffer;
2155 u16 rot;
2156 const int vpd_len = 64;
2157
2158 buffer = kmalloc(vpd_len, GFP_KERNEL);
2159
2160 if (!buffer ||
2161
2162 scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
2163 goto out;
2164
2165 rot = get_unaligned_be16(&buffer[4]);
2166
2167 if (rot == 1)
2168 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue);
2169
2170 out:
2171 kfree(buffer);
2172}
2173
2174
2175
2176
2177
2178static void sd_read_thin_provisioning(struct scsi_disk *sdkp)
2179{
2180 unsigned char *buffer;
2181 const int vpd_len = 8;
2182
2183 if (sdkp->thin_provisioning == 0)
2184 return;
2185
2186 buffer = kmalloc(vpd_len, GFP_KERNEL);
2187
2188 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
2189 goto out;
2190
2191 sdkp->tpvpd = 1;
2192 sdkp->tpu = (buffer[5] >> 7) & 1;
2193 sdkp->tpws = (buffer[5] >> 6) & 1;
2194
2195 out:
2196 kfree(buffer);
2197}
2198
2199static int sd_try_extended_inquiry(struct scsi_device *sdp)
2200{
2201
2202
2203
2204
2205
2206 if (sdp->scsi_level > SCSI_SPC_2)
2207 return 1;
2208 return 0;
2209}
2210
2211
2212
2213
2214
2215
2216static int sd_revalidate_disk(struct gendisk *disk)
2217{
2218 struct scsi_disk *sdkp = scsi_disk(disk);
2219 struct scsi_device *sdp = sdkp->device;
2220 unsigned char *buffer;
2221 unsigned flush = 0;
2222
2223 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
2224 "sd_revalidate_disk\n"));
2225
2226
2227
2228
2229
2230 if (!scsi_device_online(sdp))
2231 goto out;
2232
2233 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
2234 if (!buffer) {
2235 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
2236 "allocation failure.\n");
2237 goto out;
2238 }
2239
2240 sd_spinup_disk(sdkp);
2241
2242
2243
2244
2245
2246 if (sdkp->media_present) {
2247 sd_read_capacity(sdkp, buffer);
2248
2249 if (sd_try_extended_inquiry(sdp)) {
2250 sd_read_thin_provisioning(sdkp);
2251 sd_read_block_limits(sdkp);
2252 sd_read_block_characteristics(sdkp);
2253 }
2254
2255 sd_read_write_protect_flag(sdkp, buffer);
2256 sd_read_cache_type(sdkp, buffer);
2257 sd_read_app_tag_own(sdkp, buffer);
2258 }
2259
2260 sdkp->first_scan = 0;
2261
2262
2263
2264
2265
2266 if (sdkp->WCE) {
2267 flush |= REQ_FLUSH;
2268 if (sdkp->DPOFUA)
2269 flush |= REQ_FUA;
2270 }
2271
2272 blk_queue_flush(sdkp->disk->queue, flush);
2273
2274 set_capacity(disk, sdkp->capacity);
2275 kfree(buffer);
2276
2277 out:
2278 return 0;
2279}
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293static void sd_unlock_native_capacity(struct gendisk *disk)
2294{
2295 struct scsi_device *sdev = scsi_disk(disk)->device;
2296
2297 if (sdev->host->hostt->unlock_native_capacity)
2298 sdev->host->hostt->unlock_native_capacity(sdev);
2299}
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
2324{
2325 const int base = 'z' - 'a' + 1;
2326 char *begin = buf + strlen(prefix);
2327 char *end = buf + buflen;
2328 char *p;
2329 int unit;
2330
2331 p = end - 1;
2332 *p = '\0';
2333 unit = base;
2334 do {
2335 if (p == begin)
2336 return -EINVAL;
2337 *--p = 'a' + (index % unit);
2338 index = (index / unit) - 1;
2339 } while (index >= 0);
2340
2341 memmove(begin, p, end - p);
2342 memcpy(buf, prefix, strlen(prefix));
2343
2344 return 0;
2345}
2346
2347
2348
2349
2350static void sd_probe_async(void *data, async_cookie_t cookie)
2351{
2352 struct scsi_disk *sdkp = data;
2353 struct scsi_device *sdp;
2354 struct gendisk *gd;
2355 u32 index;
2356 struct device *dev;
2357
2358 sdp = sdkp->device;
2359 gd = sdkp->disk;
2360 index = sdkp->index;
2361 dev = &sdp->sdev_gendev;
2362
2363 gd->major = sd_major((index & 0xf0) >> 4);
2364 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
2365 gd->minors = SD_MINORS;
2366
2367 gd->fops = &sd_fops;
2368 gd->private_data = &sdkp->driver;
2369 gd->queue = sdkp->device->request_queue;
2370
2371
2372 sdp->sector_size = 512;
2373 sdkp->capacity = 0;
2374 sdkp->media_present = 1;
2375 sdkp->write_prot = 0;
2376 sdkp->WCE = 0;
2377 sdkp->RCD = 0;
2378 sdkp->ATO = 0;
2379 sdkp->first_scan = 1;
2380
2381 sd_revalidate_disk(gd);
2382
2383 blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
2384 blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn);
2385
2386 gd->driverfs_dev = &sdp->sdev_gendev;
2387 gd->flags = GENHD_FL_EXT_DEVT;
2388 if (sdp->removable) {
2389 gd->flags |= GENHD_FL_REMOVABLE;
2390 gd->events |= DISK_EVENT_MEDIA_CHANGE;
2391 }
2392
2393 add_disk(gd);
2394 sd_dif_config_host(sdkp);
2395
2396 sd_revalidate_disk(gd);
2397
2398 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
2399 sdp->removable ? "removable " : "");
2400 scsi_autopm_put_device(sdp);
2401 put_device(&sdkp->dev);
2402}
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422static int sd_probe(struct device *dev)
2423{
2424 struct scsi_device *sdp = to_scsi_device(dev);
2425 struct scsi_disk *sdkp;
2426 struct gendisk *gd;
2427 int index;
2428 int error;
2429
2430 error = -ENODEV;
2431 if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC)
2432 goto out;
2433
2434 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2435 "sd_attach\n"));
2436
2437 error = -ENOMEM;
2438 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
2439 if (!sdkp)
2440 goto out;
2441
2442 gd = alloc_disk(SD_MINORS);
2443 if (!gd)
2444 goto out_free;
2445
2446 do {
2447 if (!ida_pre_get(&sd_index_ida, GFP_KERNEL))
2448 goto out_put;
2449
2450 spin_lock(&sd_index_lock);
2451 error = ida_get_new(&sd_index_ida, &index);
2452 spin_unlock(&sd_index_lock);
2453 } while (error == -EAGAIN);
2454
2455 if (error)
2456 goto out_put;
2457
2458 if (index >= SD_MAX_DISKS) {
2459 error = -ENODEV;
2460 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name space exhausted.\n");
2461 goto out_free_index;
2462 }
2463
2464 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
2465 if (error)
2466 goto out_free_index;
2467
2468 sdkp->device = sdp;
2469 sdkp->driver = &sd_template;
2470 sdkp->disk = gd;
2471 sdkp->index = index;
2472 atomic_set(&sdkp->openers, 0);
2473
2474 if (!sdp->request_queue->rq_timeout) {
2475 if (sdp->type != TYPE_MOD)
2476 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
2477 else
2478 blk_queue_rq_timeout(sdp->request_queue,
2479 SD_MOD_TIMEOUT);
2480 }
2481
2482 device_initialize(&sdkp->dev);
2483 sdkp->dev.parent = dev;
2484 sdkp->dev.class = &sd_disk_class;
2485 dev_set_name(&sdkp->dev, dev_name(dev));
2486
2487 if (device_add(&sdkp->dev))
2488 goto out_free_index;
2489
2490 get_device(dev);
2491 dev_set_drvdata(dev, sdkp);
2492
2493 get_device(&sdkp->dev);
2494 async_schedule(sd_probe_async, sdkp);
2495
2496 return 0;
2497
2498 out_free_index:
2499 spin_lock(&sd_index_lock);
2500 ida_remove(&sd_index_ida, index);
2501 spin_unlock(&sd_index_lock);
2502 out_put:
2503 put_disk(gd);
2504 out_free:
2505 kfree(sdkp);
2506 out:
2507 return error;
2508}
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521static int sd_remove(struct device *dev)
2522{
2523 struct scsi_disk *sdkp;
2524
2525 sdkp = dev_get_drvdata(dev);
2526 scsi_autopm_get_device(sdkp->device);
2527
2528 async_synchronize_full();
2529 blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn);
2530 blk_queue_unprep_rq(sdkp->device->request_queue, NULL);
2531 device_del(&sdkp->dev);
2532 del_gendisk(sdkp->disk);
2533 sd_shutdown(dev);
2534
2535 mutex_lock(&sd_ref_mutex);
2536 dev_set_drvdata(dev, NULL);
2537 put_device(&sdkp->dev);
2538 mutex_unlock(&sd_ref_mutex);
2539
2540 return 0;
2541}
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552static void scsi_disk_release(struct device *dev)
2553{
2554 struct scsi_disk *sdkp = to_scsi_disk(dev);
2555 struct gendisk *disk = sdkp->disk;
2556
2557 spin_lock(&sd_index_lock);
2558 ida_remove(&sd_index_ida, sdkp->index);
2559 spin_unlock(&sd_index_lock);
2560
2561 disk->private_data = NULL;
2562 put_disk(disk);
2563 put_device(&sdkp->device->sdev_gendev);
2564
2565 kfree(sdkp);
2566}
2567
2568static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
2569{
2570 unsigned char cmd[6] = { START_STOP };
2571 struct scsi_sense_hdr sshdr;
2572 struct scsi_device *sdp = sdkp->device;
2573 int res;
2574
2575 if (start)
2576 cmd[4] |= 1;
2577
2578 if (sdp->start_stop_pwr_cond)
2579 cmd[4] |= start ? 1 << 4 : 3 << 4;
2580
2581 if (!scsi_device_online(sdp))
2582 return -ENODEV;
2583
2584 res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
2585 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2586 if (res) {
2587 sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n");
2588 sd_print_result(sdkp, res);
2589 if (driver_byte(res) & DRIVER_SENSE)
2590 sd_print_sense_hdr(sdkp, &sshdr);
2591 }
2592
2593 return res;
2594}
2595
2596
2597
2598
2599
2600
2601static void sd_shutdown(struct device *dev)
2602{
2603 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
2604
2605 if (!sdkp)
2606 return;
2607
2608 if (sdkp->WCE) {
2609 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
2610 sd_sync_cache(sdkp);
2611 }
2612
2613 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
2614 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
2615 sd_start_stop_device(sdkp, 0);
2616 }
2617
2618 scsi_disk_put(sdkp);
2619}
2620
2621static int sd_suspend(struct device *dev, pm_message_t mesg)
2622{
2623 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
2624 int ret = 0;
2625
2626 if (!sdkp)
2627 return 0;
2628
2629 if (sdkp->WCE) {
2630 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
2631 ret = sd_sync_cache(sdkp);
2632 if (ret)
2633 goto done;
2634 }
2635
2636 if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) {
2637 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
2638 ret = sd_start_stop_device(sdkp, 0);
2639 }
2640
2641done:
2642 scsi_disk_put(sdkp);
2643 return ret;
2644}
2645
2646static int sd_resume(struct device *dev)
2647{
2648 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
2649 int ret = 0;
2650
2651 if (!sdkp->device->manage_start_stop)
2652 goto done;
2653
2654 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
2655 ret = sd_start_stop_device(sdkp, 1);
2656
2657done:
2658 scsi_disk_put(sdkp);
2659 return ret;
2660}
2661
2662
2663
2664
2665
2666
2667
2668static int __init init_sd(void)
2669{
2670 int majors = 0, i, err;
2671
2672 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
2673
2674 for (i = 0; i < SD_MAJORS; i++)
2675 if (register_blkdev(sd_major(i), "sd") == 0)
2676 majors++;
2677
2678 if (!majors)
2679 return -ENODEV;
2680
2681 err = class_register(&sd_disk_class);
2682 if (err)
2683 goto err_out;
2684
2685 err = scsi_register_driver(&sd_template.gendrv);
2686 if (err)
2687 goto err_out_class;
2688
2689 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
2690 0, 0, NULL);
2691 if (!sd_cdb_cache) {
2692 printk(KERN_ERR "sd: can't init extended cdb cache\n");
2693 goto err_out_class;
2694 }
2695
2696 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
2697 if (!sd_cdb_pool) {
2698 printk(KERN_ERR "sd: can't init extended cdb pool\n");
2699 goto err_out_cache;
2700 }
2701
2702 return 0;
2703
2704err_out_cache:
2705 kmem_cache_destroy(sd_cdb_cache);
2706
2707err_out_class:
2708 class_unregister(&sd_disk_class);
2709err_out:
2710 for (i = 0; i < SD_MAJORS; i++)
2711 unregister_blkdev(sd_major(i), "sd");
2712 return err;
2713}
2714
2715
2716
2717
2718
2719
2720static void __exit exit_sd(void)
2721{
2722 int i;
2723
2724 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
2725
2726 mempool_destroy(sd_cdb_pool);
2727 kmem_cache_destroy(sd_cdb_cache);
2728
2729 scsi_unregister_driver(&sd_template.gendrv);
2730 class_unregister(&sd_disk_class);
2731
2732 for (i = 0; i < SD_MAJORS; i++)
2733 unregister_blkdev(sd_major(i), "sd");
2734}
2735
2736module_init(init_sd);
2737module_exit(exit_sd);
2738
2739static void sd_print_sense_hdr(struct scsi_disk *sdkp,
2740 struct scsi_sense_hdr *sshdr)
2741{
2742 sd_printk(KERN_INFO, sdkp, " ");
2743 scsi_show_sense_hdr(sshdr);
2744 sd_printk(KERN_INFO, sdkp, " ");
2745 scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
2746}
2747
2748static void sd_print_result(struct scsi_disk *sdkp, int result)
2749{
2750 sd_printk(KERN_INFO, sdkp, " ");
2751 scsi_show_result(result);
2752}
2753
2754