2 * sd.c Copyright (C) 1992 Drew Eckhardt
3 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
5 * Linux scsi disk driver
6 * Initial versions: Drew Eckhardt
7 * Subsequent revisions: Eric Youngdale
8 * Modification history:
9 * - Drew Eckhardt <drew@colorado.edu> original
10 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
11 * outstanding request, and other enhancements.
12 * Support loadable low-level scsi drivers.
13 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
14 * eight major numbers.
15 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
16 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
17 * sd_init and cleanups.
18 * - Alex Davis <letmein@erols.com> Fix problem where partition info
19 * not being read in sd_open. Fix problem where removable media
20 * could be ejected after sd_open.
21 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
22 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
23 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
24 * Support 32k/1M disks.
26 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
27 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
28 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
29 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
30 * - entering other commands: SCSI_LOG_HLQUEUE level 3
31 * Note: when the logging level is set by the user, it must be greater
32 * than the level indicated above to trigger output.
35 #include <linux/module.h>
37 #include <linux/kernel.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 <linux/sed-opal.h>
54 #include <linux/pm_runtime.h>
56 #include <linux/t10-pi.h>
57 #include <linux/uaccess.h>
58 #include <asm/unaligned.h>
60 #include <scsi/scsi.h>
61 #include <scsi/scsi_cmnd.h>
62 #include <scsi/scsi_dbg.h>
63 #include <scsi/scsi_device.h>
64 #include <scsi/scsi_driver.h>
65 #include <scsi/scsi_eh.h>
66 #include <scsi/scsi_host.h>
67 #include <scsi/scsi_ioctl.h>
68 #include <scsi/scsicam.h>
71 #include "scsi_priv.h"
72 #include "scsi_logging.h"
74 MODULE_AUTHOR("Eric Youngdale");
75 MODULE_DESCRIPTION("SCSI disk (sd) driver");
76 MODULE_LICENSE("GPL");
78 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
79 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
94 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
95 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
99 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
105 static void sd_config_discard(struct scsi_disk
*, unsigned int);
106 static void sd_config_write_same(struct scsi_disk
*);
107 static int sd_revalidate_disk(struct gendisk
*);
108 static void sd_unlock_native_capacity(struct gendisk
*disk
);
109 static int sd_probe(struct device
*);
110 static int sd_remove(struct device
*);
111 static void sd_shutdown(struct device
*);
112 static int sd_suspend_system(struct device
*);
113 static int sd_suspend_runtime(struct device
*);
114 static int sd_resume(struct device
*);
115 static void sd_rescan(struct device
*);
116 static int sd_init_command(struct scsi_cmnd
*SCpnt
);
117 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
118 static int sd_done(struct scsi_cmnd
*);
119 static void sd_eh_reset(struct scsi_cmnd
*);
120 static int sd_eh_action(struct scsi_cmnd
*, int);
121 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
122 static void scsi_disk_release(struct device
*cdev
);
123 static void sd_print_sense_hdr(struct scsi_disk
*, struct scsi_sense_hdr
*);
124 static void sd_print_result(const struct scsi_disk
*, const char *, int);
126 static DEFINE_SPINLOCK(sd_index_lock
);
127 static DEFINE_IDA(sd_index_ida
);
129 /* This semaphore is used to mediate the 0->1 reference get in the
130 * face of object destruction (i.e. we can't allow a get on an
131 * object after last put) */
132 static DEFINE_MUTEX(sd_ref_mutex
);
134 static struct kmem_cache
*sd_cdb_cache
;
135 static mempool_t
*sd_cdb_pool
;
137 static const char *sd_cache_types
[] = {
138 "write through", "none", "write back",
139 "write back, no read (daft)"
142 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
144 bool wc
= false, fua
= false;
152 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
156 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
157 const char *buf
, size_t count
)
159 int ct
, rcd
, wce
, sp
;
160 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
161 struct scsi_device
*sdp
= sdkp
->device
;
164 struct scsi_mode_data data
;
165 struct scsi_sense_hdr sshdr
;
166 static const char temp
[] = "temporary ";
169 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
170 /* no cache control on RBC devices; theoretically they
171 * can do it, but there's probably so many exceptions
172 * it's not worth the risk */
175 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
176 buf
+= sizeof(temp
) - 1;
177 sdkp
->cache_override
= 1;
179 sdkp
->cache_override
= 0;
182 ct
= sysfs_match_string(sd_cache_types
, buf
);
186 rcd
= ct
& 0x01 ? 1 : 0;
187 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
189 if (sdkp
->cache_override
) {
192 sd_set_flush_flag(sdkp
);
196 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
197 SD_MAX_RETRIES
, &data
, NULL
))
199 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
200 data
.block_descriptor_length
);
201 buffer_data
= buffer
+ data
.header_length
+
202 data
.block_descriptor_length
;
203 buffer_data
[2] &= ~0x05;
204 buffer_data
[2] |= wce
<< 2 | rcd
;
205 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
206 buffer_data
[0] &= ~0x80;
208 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
209 SD_MAX_RETRIES
, &data
, &sshdr
)) {
210 if (scsi_sense_valid(&sshdr
))
211 sd_print_sense_hdr(sdkp
, &sshdr
);
214 revalidate_disk(sdkp
->disk
);
219 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
222 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
223 struct scsi_device
*sdp
= sdkp
->device
;
225 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
229 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
230 const char *buf
, size_t count
)
232 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
233 struct scsi_device
*sdp
= sdkp
->device
;
236 if (!capable(CAP_SYS_ADMIN
))
239 if (kstrtobool(buf
, &v
))
242 sdp
->manage_start_stop
= v
;
246 static DEVICE_ATTR_RW(manage_start_stop
);
249 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
251 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
253 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
257 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
258 const char *buf
, size_t count
)
261 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
262 struct scsi_device
*sdp
= sdkp
->device
;
264 if (!capable(CAP_SYS_ADMIN
))
267 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
270 if (kstrtobool(buf
, &v
))
273 sdp
->allow_restart
= v
;
277 static DEVICE_ATTR_RW(allow_restart
);
280 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
282 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
283 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
285 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
287 static DEVICE_ATTR_RW(cache_type
);
290 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
292 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
294 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
296 static DEVICE_ATTR_RO(FUA
);
299 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
302 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
304 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
308 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
309 const char *buf
, size_t count
)
311 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
315 if (!capable(CAP_SYS_ADMIN
))
318 err
= kstrtouint(buf
, 10, &val
);
323 if (val
<= T10_PI_TYPE3_PROTECTION
)
324 sdkp
->protection_type
= val
;
328 static DEVICE_ATTR_RW(protection_type
);
331 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
334 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
335 struct scsi_device
*sdp
= sdkp
->device
;
336 unsigned int dif
, dix
;
338 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
339 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
341 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
347 return sprintf(buf
, "none\n");
349 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
351 static DEVICE_ATTR_RO(protection_mode
);
354 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
356 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
358 return sprintf(buf
, "%u\n", sdkp
->ATO
);
360 static DEVICE_ATTR_RO(app_tag_own
);
363 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
366 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
368 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
370 static DEVICE_ATTR_RO(thin_provisioning
);
372 /* sysfs_match_string() requires dense arrays */
373 static const char *lbp_mode
[] = {
374 [SD_LBP_FULL
] = "full",
375 [SD_LBP_UNMAP
] = "unmap",
376 [SD_LBP_WS16
] = "writesame_16",
377 [SD_LBP_WS10
] = "writesame_10",
378 [SD_LBP_ZERO
] = "writesame_zero",
379 [SD_LBP_DISABLE
] = "disabled",
383 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
386 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
388 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
392 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
393 const char *buf
, size_t count
)
395 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
396 struct scsi_device
*sdp
= sdkp
->device
;
399 if (!capable(CAP_SYS_ADMIN
))
402 if (sd_is_zoned(sdkp
)) {
403 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
407 if (sdp
->type
!= TYPE_DISK
)
410 mode
= sysfs_match_string(lbp_mode
, buf
);
414 sd_config_discard(sdkp
, mode
);
418 static DEVICE_ATTR_RW(provisioning_mode
);
420 /* sysfs_match_string() requires dense arrays */
421 static const char *zeroing_mode
[] = {
422 [SD_ZERO_WRITE
] = "write",
423 [SD_ZERO_WS
] = "writesame",
424 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
425 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
429 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
432 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
434 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
438 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
439 const char *buf
, size_t count
)
441 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
444 if (!capable(CAP_SYS_ADMIN
))
447 mode
= sysfs_match_string(zeroing_mode
, buf
);
451 sdkp
->zeroing_mode
= mode
;
455 static DEVICE_ATTR_RW(zeroing_mode
);
458 max_medium_access_timeouts_show(struct device
*dev
,
459 struct device_attribute
*attr
, char *buf
)
461 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
463 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
467 max_medium_access_timeouts_store(struct device
*dev
,
468 struct device_attribute
*attr
, const char *buf
,
471 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
474 if (!capable(CAP_SYS_ADMIN
))
477 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
479 return err
? err
: count
;
481 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
484 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
487 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
489 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
493 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
494 const char *buf
, size_t count
)
496 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
497 struct scsi_device
*sdp
= sdkp
->device
;
501 if (!capable(CAP_SYS_ADMIN
))
504 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
507 err
= kstrtoul(buf
, 10, &max
);
513 sdp
->no_write_same
= 1;
514 else if (max
<= SD_MAX_WS16_BLOCKS
) {
515 sdp
->no_write_same
= 0;
516 sdkp
->max_ws_blocks
= max
;
519 sd_config_write_same(sdkp
);
523 static DEVICE_ATTR_RW(max_write_same_blocks
);
525 static struct attribute
*sd_disk_attrs
[] = {
526 &dev_attr_cache_type
.attr
,
528 &dev_attr_allow_restart
.attr
,
529 &dev_attr_manage_start_stop
.attr
,
530 &dev_attr_protection_type
.attr
,
531 &dev_attr_protection_mode
.attr
,
532 &dev_attr_app_tag_own
.attr
,
533 &dev_attr_thin_provisioning
.attr
,
534 &dev_attr_provisioning_mode
.attr
,
535 &dev_attr_zeroing_mode
.attr
,
536 &dev_attr_max_write_same_blocks
.attr
,
537 &dev_attr_max_medium_access_timeouts
.attr
,
540 ATTRIBUTE_GROUPS(sd_disk
);
542 static struct class sd_disk_class
= {
544 .owner
= THIS_MODULE
,
545 .dev_release
= scsi_disk_release
,
546 .dev_groups
= sd_disk_groups
,
549 static const struct dev_pm_ops sd_pm_ops
= {
550 .suspend
= sd_suspend_system
,
552 .poweroff
= sd_suspend_system
,
553 .restore
= sd_resume
,
554 .runtime_suspend
= sd_suspend_runtime
,
555 .runtime_resume
= sd_resume
,
558 static struct scsi_driver sd_template
= {
561 .owner
= THIS_MODULE
,
564 .shutdown
= sd_shutdown
,
568 .init_command
= sd_init_command
,
569 .uninit_command
= sd_uninit_command
,
571 .eh_action
= sd_eh_action
,
572 .eh_reset
= sd_eh_reset
,
576 * Dummy kobj_map->probe function.
577 * The default ->probe function will call modprobe, which is
578 * pointless as this module is already loaded.
580 static struct kobject
*sd_default_probe(dev_t devt
, int *partno
, void *data
)
586 * Device no to disk mapping:
588 * major disc2 disc p1
589 * |............|.............|....|....| <- dev_t
592 * Inside a major, we have 16k disks, however mapped non-
593 * contiguously. The first 16 disks are for major0, the next
594 * ones with major1, ... Disk 256 is for major0 again, disk 272
596 * As we stay compatible with our numbering scheme, we can reuse
597 * the well-know SCSI majors 8, 65--71, 136--143.
599 static int sd_major(int major_idx
)
603 return SCSI_DISK0_MAJOR
;
605 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
607 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
610 return 0; /* shut up gcc */
614 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
616 struct scsi_disk
*sdkp
= NULL
;
618 mutex_lock(&sd_ref_mutex
);
620 if (disk
->private_data
) {
621 sdkp
= scsi_disk(disk
);
622 if (scsi_device_get(sdkp
->device
) == 0)
623 get_device(&sdkp
->dev
);
627 mutex_unlock(&sd_ref_mutex
);
631 static void scsi_disk_put(struct scsi_disk
*sdkp
)
633 struct scsi_device
*sdev
= sdkp
->device
;
635 mutex_lock(&sd_ref_mutex
);
636 put_device(&sdkp
->dev
);
637 scsi_device_put(sdev
);
638 mutex_unlock(&sd_ref_mutex
);
641 #ifdef CONFIG_BLK_SED_OPAL
642 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
643 size_t len
, bool send
)
645 struct scsi_device
*sdev
= data
;
649 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
651 put_unaligned_be16(spsp
, &cdb
[2]);
652 put_unaligned_be32(len
, &cdb
[6]);
654 ret
= scsi_execute_req(sdev
, cdb
,
655 send
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
,
656 buffer
, len
, NULL
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
657 return ret
<= 0 ? ret
: -EIO
;
659 #endif /* CONFIG_BLK_SED_OPAL */
661 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
662 unsigned int dix
, unsigned int dif
)
664 struct bio
*bio
= scmd
->request
->bio
;
665 unsigned int prot_op
= sd_prot_op(rq_data_dir(scmd
->request
), dix
, dif
);
666 unsigned int protect
= 0;
668 if (dix
) { /* DIX Type 0, 1, 2, 3 */
669 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
670 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
672 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
673 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
676 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
677 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
679 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
680 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
683 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
684 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
686 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
687 protect
= 3 << 5; /* Disable target PI checking */
689 protect
= 1 << 5; /* Enable target PI checking */
692 scsi_set_prot_op(scmd
, prot_op
);
693 scsi_set_prot_type(scmd
, dif
);
694 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
699 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
701 struct request_queue
*q
= sdkp
->disk
->queue
;
702 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
703 unsigned int max_blocks
= 0;
705 q
->limits
.discard_alignment
=
706 sdkp
->unmap_alignment
* logical_block_size
;
707 q
->limits
.discard_granularity
=
708 max(sdkp
->physical_block_size
,
709 sdkp
->unmap_granularity
* logical_block_size
);
710 sdkp
->provisioning_mode
= mode
;
716 blk_queue_max_discard_sectors(q
, 0);
717 blk_queue_flag_clear(QUEUE_FLAG_DISCARD
, q
);
721 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
722 (u32
)SD_MAX_WS16_BLOCKS
);
726 if (sdkp
->device
->unmap_limit_for_ws
)
727 max_blocks
= sdkp
->max_unmap_blocks
;
729 max_blocks
= sdkp
->max_ws_blocks
;
731 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
735 if (sdkp
->device
->unmap_limit_for_ws
)
736 max_blocks
= sdkp
->max_unmap_blocks
;
738 max_blocks
= sdkp
->max_ws_blocks
;
740 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
744 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
745 (u32
)SD_MAX_WS10_BLOCKS
);
749 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
750 blk_queue_flag_set(QUEUE_FLAG_DISCARD
, q
);
753 static int sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
755 struct scsi_device
*sdp
= cmd
->device
;
756 struct request
*rq
= cmd
->request
;
757 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
758 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
759 unsigned int data_len
= 24;
762 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
763 if (!rq
->special_vec
.bv_page
)
764 return BLKPREP_DEFER
;
765 rq
->special_vec
.bv_offset
= 0;
766 rq
->special_vec
.bv_len
= data_len
;
767 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
770 cmd
->cmnd
[0] = UNMAP
;
773 buf
= page_address(rq
->special_vec
.bv_page
);
774 put_unaligned_be16(6 + 16, &buf
[0]);
775 put_unaligned_be16(16, &buf
[2]);
776 put_unaligned_be64(sector
, &buf
[8]);
777 put_unaligned_be32(nr_sectors
, &buf
[16]);
779 cmd
->allowed
= SD_MAX_RETRIES
;
780 cmd
->transfersize
= data_len
;
781 rq
->timeout
= SD_TIMEOUT
;
782 scsi_req(rq
)->resid_len
= data_len
;
784 return scsi_init_io(cmd
);
787 static int sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
789 struct scsi_device
*sdp
= cmd
->device
;
790 struct request
*rq
= cmd
->request
;
791 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
792 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
793 u32 data_len
= sdp
->sector_size
;
795 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
796 if (!rq
->special_vec
.bv_page
)
797 return BLKPREP_DEFER
;
798 rq
->special_vec
.bv_offset
= 0;
799 rq
->special_vec
.bv_len
= data_len
;
800 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
803 cmd
->cmnd
[0] = WRITE_SAME_16
;
805 cmd
->cmnd
[1] = 0x8; /* UNMAP */
806 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
807 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
809 cmd
->allowed
= SD_MAX_RETRIES
;
810 cmd
->transfersize
= data_len
;
811 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
812 scsi_req(rq
)->resid_len
= data_len
;
814 return scsi_init_io(cmd
);
817 static int sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
819 struct scsi_device
*sdp
= cmd
->device
;
820 struct request
*rq
= cmd
->request
;
821 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
822 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
823 u32 data_len
= sdp
->sector_size
;
825 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
826 if (!rq
->special_vec
.bv_page
)
827 return BLKPREP_DEFER
;
828 rq
->special_vec
.bv_offset
= 0;
829 rq
->special_vec
.bv_len
= data_len
;
830 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
833 cmd
->cmnd
[0] = WRITE_SAME
;
835 cmd
->cmnd
[1] = 0x8; /* UNMAP */
836 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
837 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
839 cmd
->allowed
= SD_MAX_RETRIES
;
840 cmd
->transfersize
= data_len
;
841 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
842 scsi_req(rq
)->resid_len
= data_len
;
844 return scsi_init_io(cmd
);
847 static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
849 struct request
*rq
= cmd
->request
;
850 struct scsi_device
*sdp
= cmd
->device
;
851 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
852 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
853 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
855 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
856 switch (sdkp
->zeroing_mode
) {
857 case SD_ZERO_WS16_UNMAP
:
858 return sd_setup_write_same16_cmnd(cmd
, true);
859 case SD_ZERO_WS10_UNMAP
:
860 return sd_setup_write_same10_cmnd(cmd
, true);
864 if (sdp
->no_write_same
)
865 return BLKPREP_INVALID
;
867 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff)
868 return sd_setup_write_same16_cmnd(cmd
, false);
870 return sd_setup_write_same10_cmnd(cmd
, false);
873 static void sd_config_write_same(struct scsi_disk
*sdkp
)
875 struct request_queue
*q
= sdkp
->disk
->queue
;
876 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
878 if (sdkp
->device
->no_write_same
) {
879 sdkp
->max_ws_blocks
= 0;
883 /* Some devices can not handle block counts above 0xffff despite
884 * supporting WRITE SAME(16). Consequently we default to 64k
885 * blocks per I/O unless the device explicitly advertises a
888 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
889 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
890 (u32
)SD_MAX_WS16_BLOCKS
);
891 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
892 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
893 (u32
)SD_MAX_WS10_BLOCKS
);
895 sdkp
->device
->no_write_same
= 1;
896 sdkp
->max_ws_blocks
= 0;
899 if (sdkp
->lbprz
&& sdkp
->lbpws
)
900 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
901 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
902 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
903 else if (sdkp
->max_ws_blocks
)
904 sdkp
->zeroing_mode
= SD_ZERO_WS
;
906 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
908 if (sdkp
->max_ws_blocks
&&
909 sdkp
->physical_block_size
> logical_block_size
) {
911 * Reporting a maximum number of blocks that is not aligned
912 * on the device physical size would cause a large write same
913 * request to be split into physically unaligned chunks by
914 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
915 * even if the caller of these functions took care to align the
916 * large request. So make sure the maximum reported is aligned
917 * to the device physical block size. This is only an optional
918 * optimization for regular disks, but this is mandatory to
919 * avoid failure of large write same requests directed at
920 * sequential write required zones of host-managed ZBC disks.
922 sdkp
->max_ws_blocks
=
923 round_down(sdkp
->max_ws_blocks
,
924 bytes_to_logical(sdkp
->device
,
925 sdkp
->physical_block_size
));
929 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
930 (logical_block_size
>> 9));
931 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
932 (logical_block_size
>> 9));
936 * sd_setup_write_same_cmnd - write the same data to multiple blocks
937 * @cmd: command to prepare
939 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
940 * the preference indicated by the target device.
942 static int sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
944 struct request
*rq
= cmd
->request
;
945 struct scsi_device
*sdp
= cmd
->device
;
946 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
947 struct bio
*bio
= rq
->bio
;
948 sector_t sector
= blk_rq_pos(rq
);
949 unsigned int nr_sectors
= blk_rq_sectors(rq
);
950 unsigned int nr_bytes
= blk_rq_bytes(rq
);
953 if (sdkp
->device
->no_write_same
)
954 return BLKPREP_INVALID
;
956 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
958 sector
>>= ilog2(sdp
->sector_size
) - 9;
959 nr_sectors
>>= ilog2(sdp
->sector_size
) - 9;
961 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
963 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff) {
965 cmd
->cmnd
[0] = WRITE_SAME_16
;
966 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
967 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
970 cmd
->cmnd
[0] = WRITE_SAME
;
971 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
972 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
975 cmd
->transfersize
= sdp
->sector_size
;
976 cmd
->allowed
= SD_MAX_RETRIES
;
979 * For WRITE SAME the data transferred via the DATA OUT buffer is
980 * different from the amount of data actually written to the target.
982 * We set up __data_len to the amount of data transferred via the
983 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
984 * to transfer a single sector of data first, but then reset it to
985 * the amount of data to be written right after so that the I/O path
986 * knows how much to actually write.
988 rq
->__data_len
= sdp
->sector_size
;
989 ret
= scsi_init_io(cmd
);
990 rq
->__data_len
= nr_bytes
;
995 static int sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
997 struct request
*rq
= cmd
->request
;
999 /* flush requests don't perform I/O, zero the S/G table */
1000 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
1002 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
1004 cmd
->transfersize
= 0;
1005 cmd
->allowed
= SD_MAX_RETRIES
;
1007 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1011 static int sd_setup_read_write_cmnd(struct scsi_cmnd
*SCpnt
)
1013 struct request
*rq
= SCpnt
->request
;
1014 struct scsi_device
*sdp
= SCpnt
->device
;
1015 struct gendisk
*disk
= rq
->rq_disk
;
1016 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1017 sector_t block
= blk_rq_pos(rq
);
1019 unsigned int this_count
= blk_rq_sectors(rq
);
1020 unsigned int dif
, dix
;
1022 unsigned char protect
;
1024 ret
= scsi_init_io(SCpnt
);
1025 if (ret
!= BLKPREP_OK
)
1027 WARN_ON_ONCE(SCpnt
!= rq
->special
);
1029 /* from here on until we're complete, any goto out
1030 * is used for a killable error condition */
1034 scmd_printk(KERN_INFO
, SCpnt
,
1035 "%s: block=%llu, count=%d\n",
1036 __func__
, (unsigned long long)block
, this_count
));
1038 if (!sdp
|| !scsi_device_online(sdp
) ||
1039 block
+ blk_rq_sectors(rq
) > get_capacity(disk
)) {
1040 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1041 "Finishing %u sectors\n",
1042 blk_rq_sectors(rq
)));
1043 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1044 "Retry with 0x%p\n", SCpnt
));
1050 * quietly refuse to do anything to a changed disc until
1051 * the changed bit has been reset
1053 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
1058 * Some SD card readers can't handle multi-sector accesses which touch
1059 * the last one or two hardware sectors. Split accesses as needed.
1061 threshold
= get_capacity(disk
) - SD_LAST_BUGGY_SECTORS
*
1062 (sdp
->sector_size
/ 512);
1064 if (unlikely(sdp
->last_sector_bug
&& block
+ this_count
> threshold
)) {
1065 if (block
< threshold
) {
1066 /* Access up to the threshold but not beyond */
1067 this_count
= threshold
- block
;
1069 /* Access only a single hardware sector */
1070 this_count
= sdp
->sector_size
/ 512;
1074 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
, "block=%llu\n",
1075 (unsigned long long)block
));
1078 * If we have a 1K hardware sectorsize, prevent access to single
1079 * 512 byte sectors. In theory we could handle this - in fact
1080 * the scsi cdrom driver must be able to handle this because
1081 * we typically use 1K blocksizes, and cdroms typically have
1082 * 2K hardware sectorsizes. Of course, things are simpler
1083 * with the cdrom, since it is read-only. For performance
1084 * reasons, the filesystems should be able to handle this
1085 * and not force the scsi disk driver to use bounce buffers
1088 if (sdp
->sector_size
== 1024) {
1089 if ((block
& 1) || (blk_rq_sectors(rq
) & 1)) {
1090 scmd_printk(KERN_ERR
, SCpnt
,
1091 "Bad block number requested\n");
1095 this_count
= this_count
>> 1;
1098 if (sdp
->sector_size
== 2048) {
1099 if ((block
& 3) || (blk_rq_sectors(rq
) & 3)) {
1100 scmd_printk(KERN_ERR
, SCpnt
,
1101 "Bad block number requested\n");
1105 this_count
= this_count
>> 2;
1108 if (sdp
->sector_size
== 4096) {
1109 if ((block
& 7) || (blk_rq_sectors(rq
) & 7)) {
1110 scmd_printk(KERN_ERR
, SCpnt
,
1111 "Bad block number requested\n");
1115 this_count
= this_count
>> 3;
1118 if (rq_data_dir(rq
) == WRITE
) {
1119 SCpnt
->cmnd
[0] = WRITE_6
;
1121 if (blk_integrity_rq(rq
))
1122 t10_pi_prepare(SCpnt
->request
, sdkp
->protection_type
);
1124 } else if (rq_data_dir(rq
) == READ
) {
1125 SCpnt
->cmnd
[0] = READ_6
;
1127 scmd_printk(KERN_ERR
, SCpnt
, "Unknown command %d\n", req_op(rq
));
1131 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1132 "%s %d/%u 512 byte blocks.\n",
1133 (rq_data_dir(rq
) == WRITE
) ?
1134 "writing" : "reading", this_count
,
1135 blk_rq_sectors(rq
)));
1137 dix
= scsi_prot_sg_count(SCpnt
);
1138 dif
= scsi_host_dif_capable(SCpnt
->device
->host
, sdkp
->protection_type
);
1141 protect
= sd_setup_protect_cmnd(SCpnt
, dix
, dif
);
1145 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1146 SCpnt
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1148 if (unlikely(SCpnt
->cmnd
== NULL
)) {
1149 ret
= BLKPREP_DEFER
;
1153 SCpnt
->cmd_len
= SD_EXT_CDB_SIZE
;
1154 memset(SCpnt
->cmnd
, 0, SCpnt
->cmd_len
);
1155 SCpnt
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1156 SCpnt
->cmnd
[7] = 0x18;
1157 SCpnt
->cmnd
[9] = (rq_data_dir(rq
) == READ
) ? READ_32
: WRITE_32
;
1158 SCpnt
->cmnd
[10] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1161 SCpnt
->cmnd
[12] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1162 SCpnt
->cmnd
[13] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1163 SCpnt
->cmnd
[14] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1164 SCpnt
->cmnd
[15] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1165 SCpnt
->cmnd
[16] = (unsigned char) (block
>> 24) & 0xff;
1166 SCpnt
->cmnd
[17] = (unsigned char) (block
>> 16) & 0xff;
1167 SCpnt
->cmnd
[18] = (unsigned char) (block
>> 8) & 0xff;
1168 SCpnt
->cmnd
[19] = (unsigned char) block
& 0xff;
1170 /* Expected Indirect LBA */
1171 SCpnt
->cmnd
[20] = (unsigned char) (block
>> 24) & 0xff;
1172 SCpnt
->cmnd
[21] = (unsigned char) (block
>> 16) & 0xff;
1173 SCpnt
->cmnd
[22] = (unsigned char) (block
>> 8) & 0xff;
1174 SCpnt
->cmnd
[23] = (unsigned char) block
& 0xff;
1176 /* Transfer length */
1177 SCpnt
->cmnd
[28] = (unsigned char) (this_count
>> 24) & 0xff;
1178 SCpnt
->cmnd
[29] = (unsigned char) (this_count
>> 16) & 0xff;
1179 SCpnt
->cmnd
[30] = (unsigned char) (this_count
>> 8) & 0xff;
1180 SCpnt
->cmnd
[31] = (unsigned char) this_count
& 0xff;
1181 } else if (sdp
->use_16_for_rw
|| (this_count
> 0xffff)) {
1182 SCpnt
->cmnd
[0] += READ_16
- READ_6
;
1183 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1184 SCpnt
->cmnd
[2] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1185 SCpnt
->cmnd
[3] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1186 SCpnt
->cmnd
[4] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1187 SCpnt
->cmnd
[5] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1188 SCpnt
->cmnd
[6] = (unsigned char) (block
>> 24) & 0xff;
1189 SCpnt
->cmnd
[7] = (unsigned char) (block
>> 16) & 0xff;
1190 SCpnt
->cmnd
[8] = (unsigned char) (block
>> 8) & 0xff;
1191 SCpnt
->cmnd
[9] = (unsigned char) block
& 0xff;
1192 SCpnt
->cmnd
[10] = (unsigned char) (this_count
>> 24) & 0xff;
1193 SCpnt
->cmnd
[11] = (unsigned char) (this_count
>> 16) & 0xff;
1194 SCpnt
->cmnd
[12] = (unsigned char) (this_count
>> 8) & 0xff;
1195 SCpnt
->cmnd
[13] = (unsigned char) this_count
& 0xff;
1196 SCpnt
->cmnd
[14] = SCpnt
->cmnd
[15] = 0;
1197 } else if ((this_count
> 0xff) || (block
> 0x1fffff) ||
1198 scsi_device_protection(SCpnt
->device
) ||
1199 SCpnt
->device
->use_10_for_rw
) {
1200 SCpnt
->cmnd
[0] += READ_10
- READ_6
;
1201 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1202 SCpnt
->cmnd
[2] = (unsigned char) (block
>> 24) & 0xff;
1203 SCpnt
->cmnd
[3] = (unsigned char) (block
>> 16) & 0xff;
1204 SCpnt
->cmnd
[4] = (unsigned char) (block
>> 8) & 0xff;
1205 SCpnt
->cmnd
[5] = (unsigned char) block
& 0xff;
1206 SCpnt
->cmnd
[6] = SCpnt
->cmnd
[9] = 0;
1207 SCpnt
->cmnd
[7] = (unsigned char) (this_count
>> 8) & 0xff;
1208 SCpnt
->cmnd
[8] = (unsigned char) this_count
& 0xff;
1210 if (unlikely(rq
->cmd_flags
& REQ_FUA
)) {
1212 * This happens only if this drive failed
1213 * 10byte rw command with ILLEGAL_REQUEST
1214 * during operation and thus turned off
1217 scmd_printk(KERN_ERR
, SCpnt
,
1218 "FUA write on READ/WRITE(6) drive\n");
1222 SCpnt
->cmnd
[1] |= (unsigned char) ((block
>> 16) & 0x1f);
1223 SCpnt
->cmnd
[2] = (unsigned char) ((block
>> 8) & 0xff);
1224 SCpnt
->cmnd
[3] = (unsigned char) block
& 0xff;
1225 SCpnt
->cmnd
[4] = (unsigned char) this_count
;
1228 SCpnt
->sdb
.length
= this_count
* sdp
->sector_size
;
1231 * We shouldn't disconnect in the middle of a sector, so with a dumb
1232 * host adapter, it's safe to assume that we can at least transfer
1233 * this many bytes between each connect / disconnect.
1235 SCpnt
->transfersize
= sdp
->sector_size
;
1236 SCpnt
->underflow
= this_count
<< 9;
1237 SCpnt
->allowed
= SD_MAX_RETRIES
;
1240 * This indicates that the command is ready from our end to be
1248 static int sd_init_command(struct scsi_cmnd
*cmd
)
1250 struct request
*rq
= cmd
->request
;
1252 switch (req_op(rq
)) {
1253 case REQ_OP_DISCARD
:
1254 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1256 return sd_setup_unmap_cmnd(cmd
);
1258 return sd_setup_write_same16_cmnd(cmd
, true);
1260 return sd_setup_write_same10_cmnd(cmd
, true);
1262 return sd_setup_write_same10_cmnd(cmd
, false);
1264 return BLKPREP_INVALID
;
1266 case REQ_OP_WRITE_ZEROES
:
1267 return sd_setup_write_zeroes_cmnd(cmd
);
1268 case REQ_OP_WRITE_SAME
:
1269 return sd_setup_write_same_cmnd(cmd
);
1271 return sd_setup_flush_cmnd(cmd
);
1274 return sd_setup_read_write_cmnd(cmd
);
1275 case REQ_OP_ZONE_REPORT
:
1276 return sd_zbc_setup_report_cmnd(cmd
);
1277 case REQ_OP_ZONE_RESET
:
1278 return sd_zbc_setup_reset_cmnd(cmd
);
1284 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1286 struct request
*rq
= SCpnt
->request
;
1289 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1290 __free_page(rq
->special_vec
.bv_page
);
1292 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1296 mempool_free(cmnd
, sd_cdb_pool
);
1301 * sd_open - open a scsi disk device
1302 * @bdev: Block device of the scsi disk to open
1303 * @mode: FMODE_* mask
1305 * Returns 0 if successful. Returns a negated errno value in case
1308 * Note: This can be called from a user context (e.g. fsck(1) )
1309 * or from within the kernel (e.g. as a result of a mount(1) ).
1310 * In the latter case @inode and @filp carry an abridged amount
1311 * of information as noted above.
1313 * Locking: called with bdev->bd_mutex held.
1315 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1317 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1318 struct scsi_device
*sdev
;
1324 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1326 sdev
= sdkp
->device
;
1329 * If the device is in error recovery, wait until it is done.
1330 * If the device is offline, then disallow any access to it.
1333 if (!scsi_block_when_processing_errors(sdev
))
1336 if (sdev
->removable
|| sdkp
->write_prot
)
1337 check_disk_change(bdev
);
1340 * If the drive is empty, just let the open fail.
1342 retval
= -ENOMEDIUM
;
1343 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1347 * If the device has the write protect tab set, have the open fail
1348 * if the user expects to be able to write to the thing.
1351 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1355 * It is possible that the disk changing stuff resulted in
1356 * the device being taken offline. If this is the case,
1357 * report this to the user, and don't pretend that the
1358 * open actually succeeded.
1361 if (!scsi_device_online(sdev
))
1364 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1365 if (scsi_block_when_processing_errors(sdev
))
1366 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1372 scsi_disk_put(sdkp
);
1377 * sd_release - invoked when the (last) close(2) is called on this
1379 * @disk: disk to release
1380 * @mode: FMODE_* mask
1384 * Note: may block (uninterruptible) if error recovery is underway
1387 * Locking: called with bdev->bd_mutex held.
1389 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1391 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1392 struct scsi_device
*sdev
= sdkp
->device
;
1394 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1396 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1397 if (scsi_block_when_processing_errors(sdev
))
1398 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1402 * XXX and what if there are packets in flight and this close()
1403 * XXX is followed by a "rmmod sd_mod"?
1406 scsi_disk_put(sdkp
);
1409 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1411 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1412 struct scsi_device
*sdp
= sdkp
->device
;
1413 struct Scsi_Host
*host
= sdp
->host
;
1414 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1417 /* default to most commonly used values */
1418 diskinfo
[0] = 0x40; /* 1 << 6 */
1419 diskinfo
[1] = 0x20; /* 1 << 5 */
1420 diskinfo
[2] = capacity
>> 11;
1422 /* override with calculated, extended default, or driver values */
1423 if (host
->hostt
->bios_param
)
1424 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1426 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1428 geo
->heads
= diskinfo
[0];
1429 geo
->sectors
= diskinfo
[1];
1430 geo
->cylinders
= diskinfo
[2];
1435 * sd_ioctl - process an ioctl
1436 * @bdev: target block device
1437 * @mode: FMODE_* mask
1438 * @cmd: ioctl command number
1439 * @arg: this is third argument given to ioctl(2) system call.
1440 * Often contains a pointer.
1442 * Returns 0 if successful (some ioctls return positive numbers on
1443 * success as well). Returns a negated errno value in case of error.
1445 * Note: most ioctls are forward onto the block subsystem or further
1446 * down in the scsi subsystem.
1448 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1449 unsigned int cmd
, unsigned long arg
)
1451 struct gendisk
*disk
= bdev
->bd_disk
;
1452 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1453 struct scsi_device
*sdp
= sdkp
->device
;
1454 void __user
*p
= (void __user
*)arg
;
1457 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1458 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1460 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1465 * If we are in the middle of error recovery, don't let anyone
1466 * else try and use this device. Also, if error recovery fails, it
1467 * may try and take the device offline, in which case all further
1468 * access to the device is prohibited.
1470 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1471 (mode
& FMODE_NDELAY
) != 0);
1475 if (is_sed_ioctl(cmd
))
1476 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1479 * Send SCSI addressing ioctls directly to mid level, send other
1480 * ioctls to block level and then onto mid level if they can't be
1484 case SCSI_IOCTL_GET_IDLUN
:
1485 case SCSI_IOCTL_GET_BUS_NUMBER
:
1486 error
= scsi_ioctl(sdp
, cmd
, p
);
1489 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1490 if (error
!= -ENOTTY
)
1492 error
= scsi_ioctl(sdp
, cmd
, p
);
1499 static void set_media_not_present(struct scsi_disk
*sdkp
)
1501 if (sdkp
->media_present
)
1502 sdkp
->device
->changed
= 1;
1504 if (sdkp
->device
->removable
) {
1505 sdkp
->media_present
= 0;
1510 static int media_not_present(struct scsi_disk
*sdkp
,
1511 struct scsi_sense_hdr
*sshdr
)
1513 if (!scsi_sense_valid(sshdr
))
1516 /* not invoked for commands that could return deferred errors */
1517 switch (sshdr
->sense_key
) {
1518 case UNIT_ATTENTION
:
1520 /* medium not present */
1521 if (sshdr
->asc
== 0x3A) {
1522 set_media_not_present(sdkp
);
1530 * sd_check_events - check media events
1531 * @disk: kernel device descriptor
1532 * @clearing: disk events currently being cleared
1534 * Returns mask of DISK_EVENT_*.
1536 * Note: this function is invoked from the block subsystem.
1538 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1540 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1541 struct scsi_device
*sdp
;
1548 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1551 * If the device is offline, don't send any commands - just pretend as
1552 * if the command failed. If the device ever comes back online, we
1553 * can deal with it then. It is only because of unrecoverable errors
1554 * that we would ever take a device offline in the first place.
1556 if (!scsi_device_online(sdp
)) {
1557 set_media_not_present(sdkp
);
1562 * Using TEST_UNIT_READY enables differentiation between drive with
1563 * no cartridge loaded - NOT READY, drive with changed cartridge -
1564 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1566 * Drives that auto spin down. eg iomega jaz 1G, will be started
1567 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1568 * sd_revalidate() is called.
1570 if (scsi_block_when_processing_errors(sdp
)) {
1571 struct scsi_sense_hdr sshdr
= { 0, };
1573 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1576 /* failed to execute TUR, assume media not present */
1577 if (host_byte(retval
)) {
1578 set_media_not_present(sdkp
);
1582 if (media_not_present(sdkp
, &sshdr
))
1587 * For removable scsi disk we have to recognise the presence
1588 * of a disk in the drive.
1590 if (!sdkp
->media_present
)
1592 sdkp
->media_present
= 1;
1595 * sdp->changed is set under the following conditions:
1597 * Medium present state has changed in either direction.
1598 * Device has indicated UNIT_ATTENTION.
1600 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1602 scsi_disk_put(sdkp
);
1606 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1609 struct scsi_device
*sdp
= sdkp
->device
;
1610 const int timeout
= sdp
->request_queue
->rq_timeout
1611 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1612 struct scsi_sense_hdr my_sshdr
;
1614 if (!scsi_device_online(sdp
))
1617 /* caller might not be interested in sense, but we need it */
1621 for (retries
= 3; retries
> 0; --retries
) {
1622 unsigned char cmd
[10] = { 0 };
1624 cmd
[0] = SYNCHRONIZE_CACHE
;
1626 * Leave the rest of the command zero to indicate
1629 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1630 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1636 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1638 if (driver_byte(res
) == DRIVER_SENSE
)
1639 sd_print_sense_hdr(sdkp
, sshdr
);
1641 /* we need to evaluate the error return */
1642 if (scsi_sense_valid(sshdr
) &&
1643 (sshdr
->asc
== 0x3a || /* medium not present */
1644 sshdr
->asc
== 0x20)) /* invalid command */
1645 /* this is no error here */
1648 switch (host_byte(res
)) {
1649 /* ignore errors due to racing a disconnection */
1650 case DID_BAD_TARGET
:
1651 case DID_NO_CONNECT
:
1653 /* signal the upper layer it might try again */
1657 case DID_SOFT_ERROR
:
1666 static void sd_rescan(struct device
*dev
)
1668 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1670 revalidate_disk(sdkp
->disk
);
1674 #ifdef CONFIG_COMPAT
1676 * This gets directly called from VFS. When the ioctl
1677 * is not recognized we go back to the other translation paths.
1679 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1680 unsigned int cmd
, unsigned long arg
)
1682 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1685 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1686 (mode
& FMODE_NDELAY
) != 0);
1691 * Let the static ioctl translation table take care of it.
1693 if (!sdev
->host
->hostt
->compat_ioctl
)
1694 return -ENOIOCTLCMD
;
1695 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1699 static char sd_pr_type(enum pr_type type
)
1702 case PR_WRITE_EXCLUSIVE
:
1704 case PR_EXCLUSIVE_ACCESS
:
1706 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1708 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1710 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1712 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1719 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1720 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1722 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1723 struct scsi_sense_hdr sshdr
;
1725 u8 cmd
[16] = { 0, };
1726 u8 data
[24] = { 0, };
1728 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1731 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1733 put_unaligned_be64(key
, &data
[0]);
1734 put_unaligned_be64(sa_key
, &data
[8]);
1737 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1738 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1740 if (driver_byte(result
) == DRIVER_SENSE
&&
1741 scsi_sense_valid(&sshdr
)) {
1742 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1743 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1749 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1752 if (flags
& ~PR_FL_IGNORE_KEY
)
1754 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1755 old_key
, new_key
, 0,
1756 (1 << 0) /* APTPL */);
1759 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1764 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1767 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1769 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1772 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1773 enum pr_type type
, bool abort
)
1775 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1776 sd_pr_type(type
), 0);
1779 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1781 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1784 static const struct pr_ops sd_pr_ops
= {
1785 .pr_register
= sd_pr_register
,
1786 .pr_reserve
= sd_pr_reserve
,
1787 .pr_release
= sd_pr_release
,
1788 .pr_preempt
= sd_pr_preempt
,
1789 .pr_clear
= sd_pr_clear
,
1792 static const struct block_device_operations sd_fops
= {
1793 .owner
= THIS_MODULE
,
1795 .release
= sd_release
,
1797 .getgeo
= sd_getgeo
,
1798 #ifdef CONFIG_COMPAT
1799 .compat_ioctl
= sd_compat_ioctl
,
1801 .check_events
= sd_check_events
,
1802 .revalidate_disk
= sd_revalidate_disk
,
1803 .unlock_native_capacity
= sd_unlock_native_capacity
,
1804 .pr_ops
= &sd_pr_ops
,
1808 * sd_eh_reset - reset error handling callback
1809 * @scmd: sd-issued command that has failed
1811 * This function is called by the SCSI midlayer before starting
1812 * SCSI EH. When counting medium access failures we have to be
1813 * careful to register it only only once per device and SCSI EH run;
1814 * there might be several timed out commands which will cause the
1815 * 'max_medium_access_timeouts' counter to trigger after the first
1816 * SCSI EH run already and set the device to offline.
1817 * So this function resets the internal counter before starting SCSI EH.
1819 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1821 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1823 /* New SCSI EH run, reset gate variable */
1824 sdkp
->ignore_medium_access_errors
= false;
1828 * sd_eh_action - error handling callback
1829 * @scmd: sd-issued command that has failed
1830 * @eh_disp: The recovery disposition suggested by the midlayer
1832 * This function is called by the SCSI midlayer upon completion of an
1833 * error test command (currently TEST UNIT READY). The result of sending
1834 * the eh command is passed in eh_disp. We're looking for devices that
1835 * fail medium access commands but are OK with non access commands like
1836 * test unit ready (so wrongly see the device as having a successful
1839 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1841 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1842 struct scsi_device
*sdev
= scmd
->device
;
1844 if (!scsi_device_online(sdev
) ||
1845 !scsi_medium_access_command(scmd
) ||
1846 host_byte(scmd
->result
) != DID_TIME_OUT
||
1851 * The device has timed out executing a medium access command.
1852 * However, the TEST UNIT READY command sent during error
1853 * handling completed successfully. Either the device is in the
1854 * process of recovering or has it suffered an internal failure
1855 * that prevents access to the storage medium.
1857 if (!sdkp
->ignore_medium_access_errors
) {
1858 sdkp
->medium_access_timed_out
++;
1859 sdkp
->ignore_medium_access_errors
= true;
1863 * If the device keeps failing read/write commands but TEST UNIT
1864 * READY always completes successfully we assume that medium
1865 * access is no longer possible and take the device offline.
1867 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1868 scmd_printk(KERN_ERR
, scmd
,
1869 "Medium access timeout failure. Offlining disk!\n");
1870 mutex_lock(&sdev
->state_mutex
);
1871 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1872 mutex_unlock(&sdev
->state_mutex
);
1880 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1882 struct request
*req
= scmd
->request
;
1883 struct scsi_device
*sdev
= scmd
->device
;
1884 unsigned int transferred
, good_bytes
;
1885 u64 start_lba
, end_lba
, bad_lba
;
1888 * Some commands have a payload smaller than the device logical
1889 * block size (e.g. INQUIRY on a 4K disk).
1891 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1894 /* Check if we have a 'bad_lba' information */
1895 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1896 SCSI_SENSE_BUFFERSIZE
,
1901 * If the bad lba was reported incorrectly, we have no idea where
1904 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1905 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1906 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1910 * resid is optional but mostly filled in. When it's unused,
1911 * its value is zero, so we assume the whole buffer transferred
1913 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1915 /* This computation should always be done in terms of the
1916 * resolution of the device's medium.
1918 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1920 return min(good_bytes
, transferred
);
1924 * sd_done - bottom half handler: called when the lower level
1925 * driver has completed (successfully or otherwise) a scsi command.
1926 * @SCpnt: mid-level's per command structure.
1928 * Note: potentially run from within an ISR. Must not block.
1930 static int sd_done(struct scsi_cmnd
*SCpnt
)
1932 int result
= SCpnt
->result
;
1933 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1934 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1936 struct scsi_sense_hdr sshdr
;
1937 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1938 struct request
*req
= SCpnt
->request
;
1939 int sense_valid
= 0;
1940 int sense_deferred
= 0;
1942 switch (req_op(req
)) {
1943 case REQ_OP_DISCARD
:
1944 case REQ_OP_WRITE_ZEROES
:
1945 case REQ_OP_WRITE_SAME
:
1946 case REQ_OP_ZONE_RESET
:
1948 good_bytes
= blk_rq_bytes(req
);
1949 scsi_set_resid(SCpnt
, 0);
1952 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1955 case REQ_OP_ZONE_REPORT
:
1957 good_bytes
= scsi_bufflen(SCpnt
)
1958 - scsi_get_resid(SCpnt
);
1959 scsi_set_resid(SCpnt
, 0);
1962 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1967 * In case of bogus fw or device, we could end up having
1968 * an unaligned partial completion. Check this here and force
1971 resid
= scsi_get_resid(SCpnt
);
1972 if (resid
& (sector_size
- 1)) {
1973 sd_printk(KERN_INFO
, sdkp
,
1974 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1975 resid
, sector_size
);
1976 resid
= min(scsi_bufflen(SCpnt
),
1977 round_up(resid
, sector_size
));
1978 scsi_set_resid(SCpnt
, resid
);
1983 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
1985 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
1987 sdkp
->medium_access_timed_out
= 0;
1989 if (driver_byte(result
) != DRIVER_SENSE
&&
1990 (!sense_valid
|| sense_deferred
))
1993 switch (sshdr
.sense_key
) {
1994 case HARDWARE_ERROR
:
1996 good_bytes
= sd_completed_bytes(SCpnt
);
1998 case RECOVERED_ERROR
:
1999 good_bytes
= scsi_bufflen(SCpnt
);
2002 /* This indicates a false check condition, so ignore it. An
2003 * unknown amount of data was transferred so treat it as an
2007 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2009 case ABORTED_COMMAND
:
2010 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2011 good_bytes
= sd_completed_bytes(SCpnt
);
2013 case ILLEGAL_REQUEST
:
2014 switch (sshdr
.asc
) {
2015 case 0x10: /* DIX: Host detected corruption */
2016 good_bytes
= sd_completed_bytes(SCpnt
);
2018 case 0x20: /* INVALID COMMAND OPCODE */
2019 case 0x24: /* INVALID FIELD IN CDB */
2020 switch (SCpnt
->cmnd
[0]) {
2022 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2026 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2027 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2029 sdkp
->device
->no_write_same
= 1;
2030 sd_config_write_same(sdkp
);
2031 req
->rq_flags
|= RQF_QUIET
;
2042 if (sd_is_zoned(sdkp
))
2043 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2045 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2046 "sd_done: completed %d of %d bytes\n",
2047 good_bytes
, scsi_bufflen(SCpnt
)));
2049 if (rq_data_dir(SCpnt
->request
) == READ
&& scsi_prot_sg_count(SCpnt
) &&
2051 t10_pi_complete(SCpnt
->request
, sdkp
->protection_type
,
2052 good_bytes
/ scsi_prot_interval(SCpnt
));
2058 * spinup disk - called only in sd_revalidate_disk()
2061 sd_spinup_disk(struct scsi_disk
*sdkp
)
2063 unsigned char cmd
[10];
2064 unsigned long spintime_expire
= 0;
2065 int retries
, spintime
;
2066 unsigned int the_result
;
2067 struct scsi_sense_hdr sshdr
;
2068 int sense_valid
= 0;
2072 /* Spin up drives, as required. Only do this at boot time */
2073 /* Spinup needs to be done for module loads too. */
2078 cmd
[0] = TEST_UNIT_READY
;
2079 memset((void *) &cmd
[1], 0, 9);
2081 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2084 SD_MAX_RETRIES
, NULL
);
2087 * If the drive has indicated to us that it
2088 * doesn't have any media in it, don't bother
2089 * with any more polling.
2091 if (media_not_present(sdkp
, &sshdr
))
2095 sense_valid
= scsi_sense_valid(&sshdr
);
2097 } while (retries
< 3 &&
2098 (!scsi_status_is_good(the_result
) ||
2099 ((driver_byte(the_result
) == DRIVER_SENSE
) &&
2100 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2102 if (driver_byte(the_result
) != DRIVER_SENSE
) {
2103 /* no sense, TUR either succeeded or failed
2104 * with a status error */
2105 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2106 sd_print_result(sdkp
, "Test Unit Ready failed",
2113 * The device does not want the automatic start to be issued.
2115 if (sdkp
->device
->no_start_on_add
)
2118 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2119 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2120 break; /* manual intervention required */
2121 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2122 break; /* standby */
2123 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2124 break; /* unavailable */
2125 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2126 break; /* sanitize in progress */
2128 * Issue command to spin up drive when not ready
2131 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2132 cmd
[0] = START_STOP
;
2133 cmd
[1] = 1; /* Return immediately */
2134 memset((void *) &cmd
[2], 0, 8);
2135 cmd
[4] = 1; /* Start spin cycle */
2136 if (sdkp
->device
->start_stop_pwr_cond
)
2138 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2140 SD_TIMEOUT
, SD_MAX_RETRIES
,
2142 spintime_expire
= jiffies
+ 100 * HZ
;
2145 /* Wait 1 second for next try */
2147 printk(KERN_CONT
".");
2150 * Wait for USB flash devices with slow firmware.
2151 * Yes, this sense key/ASC combination shouldn't
2152 * occur here. It's characteristic of these devices.
2154 } else if (sense_valid
&&
2155 sshdr
.sense_key
== UNIT_ATTENTION
&&
2156 sshdr
.asc
== 0x28) {
2158 spintime_expire
= jiffies
+ 5 * HZ
;
2161 /* Wait 1 second for next try */
2164 /* we don't understand the sense code, so it's
2165 * probably pointless to loop */
2167 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2168 sd_print_sense_hdr(sdkp
, &sshdr
);
2173 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2176 if (scsi_status_is_good(the_result
))
2177 printk(KERN_CONT
"ready\n");
2179 printk(KERN_CONT
"not responding...\n");
2184 * Determine whether disk supports Data Integrity Field.
2186 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2188 struct scsi_device
*sdp
= sdkp
->device
;
2192 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2195 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2197 if (type
> T10_PI_TYPE3_PROTECTION
)
2199 else if (scsi_host_dif_capable(sdp
->host
, type
))
2202 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2205 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2206 " protection type %u. Disabling disk!\n",
2210 sd_printk(KERN_NOTICE
, sdkp
,
2211 "Enabling DIF Type %u protection\n", type
);
2214 sd_printk(KERN_NOTICE
, sdkp
,
2215 "Disabling DIF Type %u protection\n", type
);
2219 sdkp
->protection_type
= type
;
2224 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2225 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2228 if (driver_byte(the_result
) == DRIVER_SENSE
)
2229 sd_print_sense_hdr(sdkp
, sshdr
);
2231 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2234 * Set dirty bit for removable devices if not ready -
2235 * sometimes drives will not report this properly.
2237 if (sdp
->removable
&&
2238 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2239 set_media_not_present(sdkp
);
2242 * We used to set media_present to 0 here to indicate no media
2243 * in the drive, but some drives fail read capacity even with
2244 * media present, so we can't do that.
2246 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2250 #if RC16_LEN > SD_BUF_SIZE
2251 #error RC16_LEN must not be more than SD_BUF_SIZE
2254 #define READ_CAPACITY_RETRIES_ON_RESET 10
2257 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2258 * and the reported logical block size is bigger than 512 bytes. Note
2259 * that last_sector is a u64 and therefore logical_to_sectors() is not
2262 static bool sd_addressable_capacity(u64 lba
, unsigned int sector_size
)
2264 u64 last_sector
= (lba
+ 1ULL) << (ilog2(sector_size
) - 9);
2266 if (sizeof(sector_t
) == 4 && last_sector
> U32_MAX
)
2272 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2273 unsigned char *buffer
)
2275 unsigned char cmd
[16];
2276 struct scsi_sense_hdr sshdr
;
2277 int sense_valid
= 0;
2279 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2280 unsigned int alignment
;
2281 unsigned long long lba
;
2282 unsigned sector_size
;
2284 if (sdp
->no_read_capacity_16
)
2289 cmd
[0] = SERVICE_ACTION_IN_16
;
2290 cmd
[1] = SAI_READ_CAPACITY_16
;
2292 memset(buffer
, 0, RC16_LEN
);
2294 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2295 buffer
, RC16_LEN
, &sshdr
,
2296 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2298 if (media_not_present(sdkp
, &sshdr
))
2302 sense_valid
= scsi_sense_valid(&sshdr
);
2304 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2305 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2307 /* Invalid Command Operation Code or
2308 * Invalid Field in CDB, just retry
2309 * silently with RC10 */
2312 sshdr
.sense_key
== UNIT_ATTENTION
&&
2313 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2314 /* Device reset might occur several times,
2315 * give it one more chance */
2316 if (--reset_retries
> 0)
2321 } while (the_result
&& retries
);
2324 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2325 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2329 sector_size
= get_unaligned_be32(&buffer
[8]);
2330 lba
= get_unaligned_be64(&buffer
[0]);
2332 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2337 if (!sd_addressable_capacity(lba
, sector_size
)) {
2338 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2339 "kernel compiled with support for large block "
2345 /* Logical blocks per physical block exponent */
2346 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2349 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2351 /* Lowest aligned logical block */
2352 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2353 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2354 if (alignment
&& sdkp
->first_scan
)
2355 sd_printk(KERN_NOTICE
, sdkp
,
2356 "physical block alignment offset: %u\n", alignment
);
2358 if (buffer
[14] & 0x80) { /* LBPME */
2361 if (buffer
[14] & 0x40) /* LBPRZ */
2364 sd_config_discard(sdkp
, SD_LBP_WS16
);
2367 sdkp
->capacity
= lba
+ 1;
2371 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2372 unsigned char *buffer
)
2374 unsigned char cmd
[16];
2375 struct scsi_sense_hdr sshdr
;
2376 int sense_valid
= 0;
2378 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2380 unsigned sector_size
;
2383 cmd
[0] = READ_CAPACITY
;
2384 memset(&cmd
[1], 0, 9);
2385 memset(buffer
, 0, 8);
2387 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2389 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2391 if (media_not_present(sdkp
, &sshdr
))
2395 sense_valid
= scsi_sense_valid(&sshdr
);
2397 sshdr
.sense_key
== UNIT_ATTENTION
&&
2398 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2399 /* Device reset might occur several times,
2400 * give it one more chance */
2401 if (--reset_retries
> 0)
2406 } while (the_result
&& retries
);
2409 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2410 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2414 sector_size
= get_unaligned_be32(&buffer
[4]);
2415 lba
= get_unaligned_be32(&buffer
[0]);
2417 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2418 /* Some buggy (usb cardreader) devices return an lba of
2419 0xffffffff when the want to report a size of 0 (with
2420 which they really mean no media is present) */
2422 sdkp
->physical_block_size
= sector_size
;
2426 if (!sd_addressable_capacity(lba
, sector_size
)) {
2427 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2428 "kernel compiled with support for large block "
2434 sdkp
->capacity
= lba
+ 1;
2435 sdkp
->physical_block_size
= sector_size
;
2439 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2441 if (sdp
->host
->max_cmd_len
< 16)
2443 if (sdp
->try_rc_10_first
)
2445 if (sdp
->scsi_level
> SCSI_SPC_2
)
2447 if (scsi_device_protection(sdp
))
2453 * read disk capacity
2456 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2459 struct scsi_device
*sdp
= sdkp
->device
;
2461 if (sd_try_rc16_first(sdp
)) {
2462 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2463 if (sector_size
== -EOVERFLOW
)
2465 if (sector_size
== -ENODEV
)
2467 if (sector_size
< 0)
2468 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2469 if (sector_size
< 0)
2472 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2473 if (sector_size
== -EOVERFLOW
)
2475 if (sector_size
< 0)
2477 if ((sizeof(sdkp
->capacity
) > 4) &&
2478 (sdkp
->capacity
> 0xffffffffULL
)) {
2479 int old_sector_size
= sector_size
;
2480 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2481 "Trying to use READ CAPACITY(16).\n");
2482 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2483 if (sector_size
< 0) {
2484 sd_printk(KERN_NOTICE
, sdkp
,
2485 "Using 0xffffffff as device size\n");
2486 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2487 sector_size
= old_sector_size
;
2490 /* Remember that READ CAPACITY(16) succeeded */
2491 sdp
->try_rc_10_first
= 0;
2495 /* Some devices are known to return the total number of blocks,
2496 * not the highest block number. Some devices have versions
2497 * which do this and others which do not. Some devices we might
2498 * suspect of doing this but we don't know for certain.
2500 * If we know the reported capacity is wrong, decrement it. If
2501 * we can only guess, then assume the number of blocks is even
2502 * (usually true but not always) and err on the side of lowering
2505 if (sdp
->fix_capacity
||
2506 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2507 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2508 "from its reported value: %llu\n",
2509 (unsigned long long) sdkp
->capacity
);
2514 if (sector_size
== 0) {
2516 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2520 if (sector_size
!= 512 &&
2521 sector_size
!= 1024 &&
2522 sector_size
!= 2048 &&
2523 sector_size
!= 4096) {
2524 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2527 * The user might want to re-format the drive with
2528 * a supported sectorsize. Once this happens, it
2529 * would be relatively trivial to set the thing up.
2530 * For this reason, we leave the thing in the table.
2534 * set a bogus sector size so the normal read/write
2535 * logic in the block layer will eventually refuse any
2536 * request on this device without tripping over power
2537 * of two sector size assumptions
2541 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2542 blk_queue_physical_block_size(sdp
->request_queue
,
2543 sdkp
->physical_block_size
);
2544 sdkp
->device
->sector_size
= sector_size
;
2546 if (sdkp
->capacity
> 0xffffffff)
2547 sdp
->use_16_for_rw
= 1;
2552 * Print disk capacity
2555 sd_print_capacity(struct scsi_disk
*sdkp
,
2556 sector_t old_capacity
)
2558 int sector_size
= sdkp
->device
->sector_size
;
2559 char cap_str_2
[10], cap_str_10
[10];
2561 string_get_size(sdkp
->capacity
, sector_size
,
2562 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2563 string_get_size(sdkp
->capacity
, sector_size
,
2564 STRING_UNITS_10
, cap_str_10
,
2565 sizeof(cap_str_10
));
2567 if (sdkp
->first_scan
|| old_capacity
!= sdkp
->capacity
) {
2568 sd_printk(KERN_NOTICE
, sdkp
,
2569 "%llu %d-byte logical blocks: (%s/%s)\n",
2570 (unsigned long long)sdkp
->capacity
,
2571 sector_size
, cap_str_10
, cap_str_2
);
2573 if (sdkp
->physical_block_size
!= sector_size
)
2574 sd_printk(KERN_NOTICE
, sdkp
,
2575 "%u-byte physical blocks\n",
2576 sdkp
->physical_block_size
);
2578 sd_zbc_print_zones(sdkp
);
2582 /* called with buffer of length 512 */
2584 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2585 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2586 struct scsi_sense_hdr
*sshdr
)
2588 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2589 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2594 * read write protect setting, if possible - called only in sd_revalidate_disk()
2595 * called with buffer of length SD_BUF_SIZE
2598 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2601 struct scsi_device
*sdp
= sdkp
->device
;
2602 struct scsi_mode_data data
;
2603 int disk_ro
= get_disk_ro(sdkp
->disk
);
2604 int old_wp
= sdkp
->write_prot
;
2606 set_disk_ro(sdkp
->disk
, 0);
2607 if (sdp
->skip_ms_page_3f
) {
2608 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2612 if (sdp
->use_192_bytes_for_3f
) {
2613 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2616 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2617 * We have to start carefully: some devices hang if we ask
2618 * for more than is available.
2620 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2623 * Second attempt: ask for page 0 When only page 0 is
2624 * implemented, a request for page 3F may return Sense Key
2625 * 5: Illegal Request, Sense Code 24: Invalid field in
2628 if (!scsi_status_is_good(res
))
2629 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2632 * Third attempt: ask 255 bytes, as we did earlier.
2634 if (!scsi_status_is_good(res
))
2635 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2639 if (!scsi_status_is_good(res
)) {
2640 sd_first_printk(KERN_WARNING
, sdkp
,
2641 "Test WP failed, assume Write Enabled\n");
2643 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2644 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
|| disk_ro
);
2645 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2646 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2647 sdkp
->write_prot
? "on" : "off");
2648 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2654 * sd_read_cache_type - called only from sd_revalidate_disk()
2655 * called with buffer of length SD_BUF_SIZE
2658 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2661 struct scsi_device
*sdp
= sdkp
->device
;
2666 struct scsi_mode_data data
;
2667 struct scsi_sense_hdr sshdr
;
2668 int old_wce
= sdkp
->WCE
;
2669 int old_rcd
= sdkp
->RCD
;
2670 int old_dpofua
= sdkp
->DPOFUA
;
2673 if (sdkp
->cache_override
)
2677 if (sdp
->skip_ms_page_8
) {
2678 if (sdp
->type
== TYPE_RBC
)
2681 if (sdp
->skip_ms_page_3f
)
2684 if (sdp
->use_192_bytes_for_3f
)
2688 } else if (sdp
->type
== TYPE_RBC
) {
2696 /* cautiously ask */
2697 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2700 if (!scsi_status_is_good(res
))
2703 if (!data
.header_length
) {
2706 sd_first_printk(KERN_ERR
, sdkp
,
2707 "Missing header in MODE_SENSE response\n");
2710 /* that went OK, now ask for the proper length */
2714 * We're only interested in the first three bytes, actually.
2715 * But the data cache page is defined for the first 20.
2719 else if (len
> SD_BUF_SIZE
) {
2720 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2721 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2724 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2728 if (len
> first_len
)
2729 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2732 if (scsi_status_is_good(res
)) {
2733 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2735 while (offset
< len
) {
2736 u8 page_code
= buffer
[offset
] & 0x3F;
2737 u8 spf
= buffer
[offset
] & 0x40;
2739 if (page_code
== 8 || page_code
== 6) {
2740 /* We're interested only in the first 3 bytes.
2742 if (len
- offset
<= 2) {
2743 sd_first_printk(KERN_ERR
, sdkp
,
2744 "Incomplete mode parameter "
2748 modepage
= page_code
;
2752 /* Go to the next page */
2753 if (spf
&& len
- offset
> 3)
2754 offset
+= 4 + (buffer
[offset
+2] << 8) +
2756 else if (!spf
&& len
- offset
> 1)
2757 offset
+= 2 + buffer
[offset
+1];
2759 sd_first_printk(KERN_ERR
, sdkp
,
2761 "parameter data\n");
2767 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2771 if (modepage
== 8) {
2772 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2773 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2775 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2779 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2780 if (sdp
->broken_fua
) {
2781 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2783 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2784 !sdkp
->device
->use_16_for_rw
) {
2785 sd_first_printk(KERN_NOTICE
, sdkp
,
2786 "Uses READ/WRITE(6), disabling FUA\n");
2790 /* No cache flush allowed for write protected devices */
2791 if (sdkp
->WCE
&& sdkp
->write_prot
)
2794 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2795 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2796 sd_printk(KERN_NOTICE
, sdkp
,
2797 "Write cache: %s, read cache: %s, %s\n",
2798 sdkp
->WCE
? "enabled" : "disabled",
2799 sdkp
->RCD
? "disabled" : "enabled",
2800 sdkp
->DPOFUA
? "supports DPO and FUA"
2801 : "doesn't support DPO or FUA");
2807 if (scsi_sense_valid(&sshdr
) &&
2808 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2809 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2810 /* Invalid field in CDB */
2811 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2813 sd_first_printk(KERN_ERR
, sdkp
,
2814 "Asking for cache data failed\n");
2817 if (sdp
->wce_default_on
) {
2818 sd_first_printk(KERN_NOTICE
, sdkp
,
2819 "Assuming drive cache: write back\n");
2822 sd_first_printk(KERN_ERR
, sdkp
,
2823 "Assuming drive cache: write through\n");
2831 * The ATO bit indicates whether the DIF application tag is available
2832 * for use by the operating system.
2834 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2837 struct scsi_device
*sdp
= sdkp
->device
;
2838 struct scsi_mode_data data
;
2839 struct scsi_sense_hdr sshdr
;
2841 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2844 if (sdkp
->protection_type
== 0)
2847 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2848 SD_MAX_RETRIES
, &data
, &sshdr
);
2850 if (!scsi_status_is_good(res
) || !data
.header_length
||
2852 sd_first_printk(KERN_WARNING
, sdkp
,
2853 "getting Control mode page failed, assume no ATO\n");
2855 if (scsi_sense_valid(&sshdr
))
2856 sd_print_sense_hdr(sdkp
, &sshdr
);
2861 offset
= data
.header_length
+ data
.block_descriptor_length
;
2863 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2864 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2868 if ((buffer
[offset
+ 5] & 0x80) == 0)
2877 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2878 * @sdkp: disk to query
2880 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2882 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2883 const int vpd_len
= 64;
2884 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2887 /* Block Limits VPD */
2888 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2891 blk_queue_io_min(sdkp
->disk
->queue
,
2892 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2894 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2895 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2897 if (buffer
[3] == 0x3c) {
2898 unsigned int lba_count
, desc_count
;
2900 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2905 lba_count
= get_unaligned_be32(&buffer
[20]);
2906 desc_count
= get_unaligned_be32(&buffer
[24]);
2908 if (lba_count
&& desc_count
)
2909 sdkp
->max_unmap_blocks
= lba_count
;
2911 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2913 if (buffer
[32] & 0x80)
2914 sdkp
->unmap_alignment
=
2915 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2917 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2919 if (sdkp
->max_unmap_blocks
)
2920 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2922 sd_config_discard(sdkp
, SD_LBP_WS16
);
2924 } else { /* LBP VPD page tells us what to use */
2925 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2926 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2927 else if (sdkp
->lbpws
)
2928 sd_config_discard(sdkp
, SD_LBP_WS16
);
2929 else if (sdkp
->lbpws10
)
2930 sd_config_discard(sdkp
, SD_LBP_WS10
);
2932 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2941 * sd_read_block_characteristics - Query block dev. characteristics
2942 * @sdkp: disk to query
2944 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2946 struct request_queue
*q
= sdkp
->disk
->queue
;
2947 unsigned char *buffer
;
2949 const int vpd_len
= 64;
2951 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2954 /* Block Device Characteristics VPD */
2955 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2958 rot
= get_unaligned_be16(&buffer
[4]);
2961 blk_queue_flag_set(QUEUE_FLAG_NONROT
, q
);
2962 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM
, q
);
2965 if (sdkp
->device
->type
== TYPE_ZBC
) {
2967 q
->limits
.zoned
= BLK_ZONED_HM
;
2969 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2970 if (sdkp
->zoned
== 1)
2972 q
->limits
.zoned
= BLK_ZONED_HA
;
2975 * Treat drive-managed devices as
2976 * regular block devices.
2978 q
->limits
.zoned
= BLK_ZONED_NONE
;
2980 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
2981 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
2982 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
2989 * sd_read_block_provisioning - Query provisioning VPD page
2990 * @sdkp: disk to query
2992 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
2994 unsigned char *buffer
;
2995 const int vpd_len
= 8;
2997 if (sdkp
->lbpme
== 0)
3000 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
3002 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
3006 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
3007 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3008 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3014 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3016 struct scsi_device
*sdev
= sdkp
->device
;
3018 if (sdev
->host
->no_write_same
) {
3019 sdev
->no_write_same
= 1;
3024 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3025 /* too large values might cause issues with arcmsr */
3026 int vpd_buf_len
= 64;
3028 sdev
->no_report_opcodes
= 1;
3030 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3031 * CODES is unsupported and the device has an ATA
3032 * Information VPD page (SAT).
3034 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3035 sdev
->no_write_same
= 1;
3038 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3041 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3045 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3047 struct scsi_device
*sdev
= sdkp
->device
;
3049 if (!sdev
->security_supported
)
3052 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3053 SECURITY_PROTOCOL_IN
) == 1 &&
3054 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3055 SECURITY_PROTOCOL_OUT
) == 1)
3060 * sd_revalidate_disk - called the first time a new disk is seen,
3061 * performs disk spin up, read_capacity, etc.
3062 * @disk: struct gendisk we care about
3064 static int sd_revalidate_disk(struct gendisk
*disk
)
3066 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3067 struct scsi_device
*sdp
= sdkp
->device
;
3068 struct request_queue
*q
= sdkp
->disk
->queue
;
3069 sector_t old_capacity
= sdkp
->capacity
;
3070 unsigned char *buffer
;
3071 unsigned int dev_max
, rw_max
;
3073 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3074 "sd_revalidate_disk\n"));
3077 * If the device is offline, don't try and read capacity or any
3078 * of the other niceties.
3080 if (!scsi_device_online(sdp
))
3083 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3085 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3086 "allocation failure.\n");
3090 sd_spinup_disk(sdkp
);
3093 * Without media there is no reason to ask; moreover, some devices
3094 * react badly if we do.
3096 if (sdkp
->media_present
) {
3097 sd_read_capacity(sdkp
, buffer
);
3099 if (scsi_device_supports_vpd(sdp
)) {
3100 sd_read_block_provisioning(sdkp
);
3101 sd_read_block_limits(sdkp
);
3102 sd_read_block_characteristics(sdkp
);
3103 sd_zbc_read_zones(sdkp
, buffer
);
3106 sd_print_capacity(sdkp
, old_capacity
);
3108 sd_read_write_protect_flag(sdkp
, buffer
);
3109 sd_read_cache_type(sdkp
, buffer
);
3110 sd_read_app_tag_own(sdkp
, buffer
);
3111 sd_read_write_same(sdkp
, buffer
);
3112 sd_read_security(sdkp
, buffer
);
3116 * We now have all cache related info, determine how we deal
3117 * with flush requests.
3119 sd_set_flush_flag(sdkp
);
3121 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3122 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3124 /* Some devices report a maximum block count for READ/WRITE requests. */
3125 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3126 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3129 * Determine the device's preferred I/O size for reads and writes
3130 * unless the reported value is unreasonably small, large, or
3133 if (sdkp
->opt_xfer_blocks
&&
3134 sdkp
->opt_xfer_blocks
<= dev_max
&&
3135 sdkp
->opt_xfer_blocks
<= SD_DEF_XFER_BLOCKS
&&
3136 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
) >= PAGE_SIZE
) {
3137 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3138 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3140 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3141 (sector_t
)BLK_DEF_MAX_SECTORS
);
3143 /* Do not exceed controller limit */
3144 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3147 * Only update max_sectors if previously unset or if the current value
3148 * exceeds the capabilities of the hardware.
3150 if (sdkp
->first_scan
||
3151 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3152 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3153 q
->limits
.max_sectors
= rw_max
;
3155 sdkp
->first_scan
= 0;
3157 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3158 sd_config_write_same(sdkp
);
3166 * sd_unlock_native_capacity - unlock native capacity
3167 * @disk: struct gendisk to set capacity for
3169 * Block layer calls this function if it detects that partitions
3170 * on @disk reach beyond the end of the device. If the SCSI host
3171 * implements ->unlock_native_capacity() method, it's invoked to
3172 * give it a chance to adjust the device capacity.
3175 * Defined by block layer. Might sleep.
3177 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3179 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3181 if (sdev
->host
->hostt
->unlock_native_capacity
)
3182 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3186 * sd_format_disk_name - format disk name
3187 * @prefix: name prefix - ie. "sd" for SCSI disks
3188 * @index: index of the disk to format name for
3189 * @buf: output buffer
3190 * @buflen: length of the output buffer
3192 * SCSI disk names starts at sda. The 26th device is sdz and the
3193 * 27th is sdaa. The last one for two lettered suffix is sdzz
3194 * which is followed by sdaaa.
3196 * This is basically 26 base counting with one extra 'nil' entry
3197 * at the beginning from the second digit on and can be
3198 * determined using similar method as 26 base conversion with the
3199 * index shifted -1 after each digit is computed.
3205 * 0 on success, -errno on failure.
3207 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3209 const int base
= 'z' - 'a' + 1;
3210 char *begin
= buf
+ strlen(prefix
);
3211 char *end
= buf
+ buflen
;
3221 *--p
= 'a' + (index
% unit
);
3222 index
= (index
/ unit
) - 1;
3223 } while (index
>= 0);
3225 memmove(begin
, p
, end
- p
);
3226 memcpy(buf
, prefix
, strlen(prefix
));
3232 * The asynchronous part of sd_probe
3234 static void sd_probe_async(void *data
, async_cookie_t cookie
)
3236 struct scsi_disk
*sdkp
= data
;
3237 struct scsi_device
*sdp
;
3244 index
= sdkp
->index
;
3245 dev
= &sdp
->sdev_gendev
;
3247 gd
->major
= sd_major((index
& 0xf0) >> 4);
3248 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3250 gd
->fops
= &sd_fops
;
3251 gd
->private_data
= &sdkp
->driver
;
3252 gd
->queue
= sdkp
->device
->request_queue
;
3254 /* defaults, until the device tells us otherwise */
3255 sdp
->sector_size
= 512;
3257 sdkp
->media_present
= 1;
3258 sdkp
->write_prot
= 0;
3259 sdkp
->cache_override
= 0;
3263 sdkp
->first_scan
= 1;
3264 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3266 sd_revalidate_disk(gd
);
3268 gd
->flags
= GENHD_FL_EXT_DEVT
;
3269 if (sdp
->removable
) {
3270 gd
->flags
|= GENHD_FL_REMOVABLE
;
3271 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3274 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3275 device_add_disk(dev
, gd
);
3277 sd_dif_config_host(sdkp
);
3279 sd_revalidate_disk(gd
);
3281 if (sdkp
->security
) {
3282 sdkp
->opal_dev
= init_opal_dev(sdp
, &sd_sec_submit
);
3284 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3287 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3288 sdp
->removable
? "removable " : "");
3289 scsi_autopm_put_device(sdp
);
3290 put_device(&sdkp
->dev
);
3294 * sd_probe - called during driver initialization and whenever a
3295 * new scsi device is attached to the system. It is called once
3296 * for each scsi device (not just disks) present.
3297 * @dev: pointer to device object
3299 * Returns 0 if successful (or not interested in this scsi device
3300 * (e.g. scanner)); 1 when there is an error.
3302 * Note: this function is invoked from the scsi mid-level.
3303 * This function sets up the mapping between a given
3304 * <host,channel,id,lun> (found in sdp) and new device name
3305 * (e.g. /dev/sda). More precisely it is the block device major
3306 * and minor number that is chosen here.
3308 * Assume sd_probe is not re-entrant (for time being)
3309 * Also think about sd_probe() and sd_remove() running coincidentally.
3311 static int sd_probe(struct device
*dev
)
3313 struct scsi_device
*sdp
= to_scsi_device(dev
);
3314 struct scsi_disk
*sdkp
;
3319 scsi_autopm_get_device(sdp
);
3321 if (sdp
->type
!= TYPE_DISK
&&
3322 sdp
->type
!= TYPE_ZBC
&&
3323 sdp
->type
!= TYPE_MOD
&&
3324 sdp
->type
!= TYPE_RBC
)
3327 #ifndef CONFIG_BLK_DEV_ZONED
3328 if (sdp
->type
== TYPE_ZBC
)
3331 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3335 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3339 gd
= alloc_disk(SD_MINORS
);
3344 if (!ida_pre_get(&sd_index_ida
, GFP_KERNEL
))
3347 spin_lock(&sd_index_lock
);
3348 error
= ida_get_new(&sd_index_ida
, &index
);
3349 spin_unlock(&sd_index_lock
);
3350 } while (error
== -EAGAIN
);
3353 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3357 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3359 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3360 goto out_free_index
;
3364 sdkp
->driver
= &sd_template
;
3366 sdkp
->index
= index
;
3367 atomic_set(&sdkp
->openers
, 0);
3368 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3370 if (!sdp
->request_queue
->rq_timeout
) {
3371 if (sdp
->type
!= TYPE_MOD
)
3372 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3374 blk_queue_rq_timeout(sdp
->request_queue
,
3378 device_initialize(&sdkp
->dev
);
3379 sdkp
->dev
.parent
= dev
;
3380 sdkp
->dev
.class = &sd_disk_class
;
3381 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3383 error
= device_add(&sdkp
->dev
);
3385 goto out_free_index
;
3388 dev_set_drvdata(dev
, sdkp
);
3390 get_device(&sdkp
->dev
); /* prevent release before async_schedule */
3391 async_schedule_domain(sd_probe_async
, sdkp
, &scsi_sd_probe_domain
);
3396 spin_lock(&sd_index_lock
);
3397 ida_remove(&sd_index_ida
, index
);
3398 spin_unlock(&sd_index_lock
);
3404 scsi_autopm_put_device(sdp
);
3409 * sd_remove - called whenever a scsi disk (previously recognized by
3410 * sd_probe) is detached from the system. It is called (potentially
3411 * multiple times) during sd module unload.
3412 * @dev: pointer to device object
3414 * Note: this function is invoked from the scsi mid-level.
3415 * This function potentially frees up a device name (e.g. /dev/sdc)
3416 * that could be re-used by a subsequent sd_probe().
3417 * This function is not called when the built-in sd driver is "exit-ed".
3419 static int sd_remove(struct device
*dev
)
3421 struct scsi_disk
*sdkp
;
3424 sdkp
= dev_get_drvdata(dev
);
3425 devt
= disk_devt(sdkp
->disk
);
3426 scsi_autopm_get_device(sdkp
->device
);
3428 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3429 async_synchronize_full_domain(&scsi_sd_probe_domain
);
3430 device_del(&sdkp
->dev
);
3431 del_gendisk(sdkp
->disk
);
3434 sd_zbc_remove(sdkp
);
3436 free_opal_dev(sdkp
->opal_dev
);
3438 blk_register_region(devt
, SD_MINORS
, NULL
,
3439 sd_default_probe
, NULL
, NULL
);
3441 mutex_lock(&sd_ref_mutex
);
3442 dev_set_drvdata(dev
, NULL
);
3443 put_device(&sdkp
->dev
);
3444 mutex_unlock(&sd_ref_mutex
);
3450 * scsi_disk_release - Called to free the scsi_disk structure
3451 * @dev: pointer to embedded class device
3453 * sd_ref_mutex must be held entering this routine. Because it is
3454 * called on last put, you should always use the scsi_disk_get()
3455 * scsi_disk_put() helpers which manipulate the semaphore directly
3456 * and never do a direct put_device.
3458 static void scsi_disk_release(struct device
*dev
)
3460 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3461 struct gendisk
*disk
= sdkp
->disk
;
3463 spin_lock(&sd_index_lock
);
3464 ida_remove(&sd_index_ida
, sdkp
->index
);
3465 spin_unlock(&sd_index_lock
);
3467 disk
->private_data
= NULL
;
3469 put_device(&sdkp
->device
->sdev_gendev
);
3474 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3476 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3477 struct scsi_sense_hdr sshdr
;
3478 struct scsi_device
*sdp
= sdkp
->device
;
3482 cmd
[4] |= 1; /* START */
3484 if (sdp
->start_stop_pwr_cond
)
3485 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3487 if (!scsi_device_online(sdp
))
3490 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3491 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3493 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3494 if (driver_byte(res
) == DRIVER_SENSE
)
3495 sd_print_sense_hdr(sdkp
, &sshdr
);
3496 if (scsi_sense_valid(&sshdr
) &&
3497 /* 0x3a is medium not present */
3502 /* SCSI error codes must not go to the generic layer */
3510 * Send a SYNCHRONIZE CACHE instruction down to the device through
3511 * the normal SCSI command structure. Wait for the command to
3514 static void sd_shutdown(struct device
*dev
)
3516 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3519 return; /* this can happen */
3521 if (pm_runtime_suspended(dev
))
3524 if (sdkp
->WCE
&& sdkp
->media_present
) {
3525 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3526 sd_sync_cache(sdkp
, NULL
);
3529 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3530 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3531 sd_start_stop_device(sdkp
, 0);
3535 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3537 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3538 struct scsi_sense_hdr sshdr
;
3541 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3544 if (sdkp
->WCE
&& sdkp
->media_present
) {
3545 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3546 ret
= sd_sync_cache(sdkp
, &sshdr
);
3549 /* ignore OFFLINE device */
3553 if (!scsi_sense_valid(&sshdr
) ||
3554 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3558 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3559 * doesn't support sync. There's not much to do and
3560 * suspend shouldn't fail.
3566 if (sdkp
->device
->manage_start_stop
) {
3567 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3568 /* an error is not worth aborting a system sleep */
3569 ret
= sd_start_stop_device(sdkp
, 0);
3570 if (ignore_stop_errors
)
3577 static int sd_suspend_system(struct device
*dev
)
3579 return sd_suspend_common(dev
, true);
3582 static int sd_suspend_runtime(struct device
*dev
)
3584 return sd_suspend_common(dev
, false);
3587 static int sd_resume(struct device
*dev
)
3589 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3592 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3595 if (!sdkp
->device
->manage_start_stop
)
3598 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3599 ret
= sd_start_stop_device(sdkp
, 1);
3601 opal_unlock_from_suspend(sdkp
->opal_dev
);
3606 * init_sd - entry point for this driver (both when built in or when
3609 * Note: this function registers this driver with the scsi mid-level.
3611 static int __init
init_sd(void)
3613 int majors
= 0, i
, err
;
3615 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3617 for (i
= 0; i
< SD_MAJORS
; i
++) {
3618 if (register_blkdev(sd_major(i
), "sd") != 0)
3621 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3622 sd_default_probe
, NULL
, NULL
);
3628 err
= class_register(&sd_disk_class
);
3632 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3634 if (!sd_cdb_cache
) {
3635 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3640 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3642 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3647 err
= scsi_register_driver(&sd_template
.gendrv
);
3649 goto err_out_driver
;
3654 mempool_destroy(sd_cdb_pool
);
3657 kmem_cache_destroy(sd_cdb_cache
);
3660 class_unregister(&sd_disk_class
);
3662 for (i
= 0; i
< SD_MAJORS
; i
++)
3663 unregister_blkdev(sd_major(i
), "sd");
3668 * exit_sd - exit point for this driver (when it is a module).
3670 * Note: this function unregisters this driver from the scsi mid-level.
3672 static void __exit
exit_sd(void)
3676 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3678 scsi_unregister_driver(&sd_template
.gendrv
);
3679 mempool_destroy(sd_cdb_pool
);
3680 kmem_cache_destroy(sd_cdb_cache
);
3682 class_unregister(&sd_disk_class
);
3684 for (i
= 0; i
< SD_MAJORS
; i
++) {
3685 blk_unregister_region(sd_major(i
), SD_MINORS
);
3686 unregister_blkdev(sd_major(i
), "sd");
3690 module_init(init_sd
);
3691 module_exit(exit_sd
);
3693 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3694 struct scsi_sense_hdr
*sshdr
)
3696 scsi_print_sense_hdr(sdkp
->device
,
3697 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3700 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3703 const char *hb_string
= scsi_hostbyte_string(result
);
3704 const char *db_string
= scsi_driverbyte_string(result
);
3706 if (hb_string
|| db_string
)
3707 sd_printk(KERN_INFO
, sdkp
,
3708 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3709 hb_string
? hb_string
: "invalid",
3710 db_string
? db_string
: "invalid");
3712 sd_printk(KERN_INFO
, sdkp
,
3713 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3714 msg
, host_byte(result
), driver_byte(result
));