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/blk-pm.h>
49 #include <linux/delay.h>
50 #include <linux/mutex.h>
51 #include <linux/string_helpers.h>
52 #include <linux/async.h>
53 #include <linux/slab.h>
54 #include <linux/sed-opal.h>
55 #include <linux/pm_runtime.h>
57 #include <linux/t10-pi.h>
58 #include <linux/uaccess.h>
59 #include <asm/unaligned.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_dbg.h>
64 #include <scsi/scsi_device.h>
65 #include <scsi/scsi_driver.h>
66 #include <scsi/scsi_eh.h>
67 #include <scsi/scsi_host.h>
68 #include <scsi/scsi_ioctl.h>
69 #include <scsi/scsicam.h>
72 #include "scsi_priv.h"
73 #include "scsi_logging.h"
75 MODULE_AUTHOR("Eric Youngdale");
76 MODULE_DESCRIPTION("SCSI disk (sd) driver");
77 MODULE_LICENSE("GPL");
79 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
94 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
95 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
98 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
100 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
106 static void sd_config_discard(struct scsi_disk
*, unsigned int);
107 static void sd_config_write_same(struct scsi_disk
*);
108 static int sd_revalidate_disk(struct gendisk
*);
109 static void sd_unlock_native_capacity(struct gendisk
*disk
);
110 static int sd_probe(struct device
*);
111 static int sd_remove(struct device
*);
112 static void sd_shutdown(struct device
*);
113 static int sd_suspend_system(struct device
*);
114 static int sd_suspend_runtime(struct device
*);
115 static int sd_resume(struct device
*);
116 static void sd_rescan(struct device
*);
117 static blk_status_t
sd_init_command(struct scsi_cmnd
*SCpnt
);
118 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
119 static int sd_done(struct scsi_cmnd
*);
120 static void sd_eh_reset(struct scsi_cmnd
*);
121 static int sd_eh_action(struct scsi_cmnd
*, int);
122 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
123 static void scsi_disk_release(struct device
*cdev
);
124 static void sd_print_sense_hdr(struct scsi_disk
*, struct scsi_sense_hdr
*);
125 static void sd_print_result(const struct scsi_disk
*, const char *, int);
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
;
136 static mempool_t
*sd_page_pool
;
138 static const char *sd_cache_types
[] = {
139 "write through", "none", "write back",
140 "write back, no read (daft)"
143 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
145 bool wc
= false, fua
= false;
153 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
157 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
158 const char *buf
, size_t count
)
160 int ct
, rcd
, wce
, sp
;
161 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
162 struct scsi_device
*sdp
= sdkp
->device
;
165 struct scsi_mode_data data
;
166 struct scsi_sense_hdr sshdr
;
167 static const char temp
[] = "temporary ";
170 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
171 /* no cache control on RBC devices; theoretically they
172 * can do it, but there's probably so many exceptions
173 * it's not worth the risk */
176 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
177 buf
+= sizeof(temp
) - 1;
178 sdkp
->cache_override
= 1;
180 sdkp
->cache_override
= 0;
183 ct
= sysfs_match_string(sd_cache_types
, buf
);
187 rcd
= ct
& 0x01 ? 1 : 0;
188 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
190 if (sdkp
->cache_override
) {
193 sd_set_flush_flag(sdkp
);
197 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
198 SD_MAX_RETRIES
, &data
, NULL
))
200 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
201 data
.block_descriptor_length
);
202 buffer_data
= buffer
+ data
.header_length
+
203 data
.block_descriptor_length
;
204 buffer_data
[2] &= ~0x05;
205 buffer_data
[2] |= wce
<< 2 | rcd
;
206 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
207 buffer_data
[0] &= ~0x80;
209 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
210 SD_MAX_RETRIES
, &data
, &sshdr
)) {
211 if (scsi_sense_valid(&sshdr
))
212 sd_print_sense_hdr(sdkp
, &sshdr
);
215 revalidate_disk(sdkp
->disk
);
220 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
223 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
224 struct scsi_device
*sdp
= sdkp
->device
;
226 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
230 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
231 const char *buf
, size_t count
)
233 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
234 struct scsi_device
*sdp
= sdkp
->device
;
237 if (!capable(CAP_SYS_ADMIN
))
240 if (kstrtobool(buf
, &v
))
243 sdp
->manage_start_stop
= v
;
247 static DEVICE_ATTR_RW(manage_start_stop
);
250 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
252 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
254 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
258 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
259 const char *buf
, size_t count
)
262 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
263 struct scsi_device
*sdp
= sdkp
->device
;
265 if (!capable(CAP_SYS_ADMIN
))
268 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
271 if (kstrtobool(buf
, &v
))
274 sdp
->allow_restart
= v
;
278 static DEVICE_ATTR_RW(allow_restart
);
281 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
283 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
284 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
286 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
288 static DEVICE_ATTR_RW(cache_type
);
291 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
293 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
295 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
297 static DEVICE_ATTR_RO(FUA
);
300 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
303 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
305 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
309 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
310 const char *buf
, size_t count
)
312 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
316 if (!capable(CAP_SYS_ADMIN
))
319 err
= kstrtouint(buf
, 10, &val
);
324 if (val
<= T10_PI_TYPE3_PROTECTION
)
325 sdkp
->protection_type
= val
;
329 static DEVICE_ATTR_RW(protection_type
);
332 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
335 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
336 struct scsi_device
*sdp
= sdkp
->device
;
337 unsigned int dif
, dix
;
339 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
340 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
342 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
348 return sprintf(buf
, "none\n");
350 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
352 static DEVICE_ATTR_RO(protection_mode
);
355 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
357 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
359 return sprintf(buf
, "%u\n", sdkp
->ATO
);
361 static DEVICE_ATTR_RO(app_tag_own
);
364 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
367 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
369 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
371 static DEVICE_ATTR_RO(thin_provisioning
);
373 /* sysfs_match_string() requires dense arrays */
374 static const char *lbp_mode
[] = {
375 [SD_LBP_FULL
] = "full",
376 [SD_LBP_UNMAP
] = "unmap",
377 [SD_LBP_WS16
] = "writesame_16",
378 [SD_LBP_WS10
] = "writesame_10",
379 [SD_LBP_ZERO
] = "writesame_zero",
380 [SD_LBP_DISABLE
] = "disabled",
384 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
387 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
389 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
393 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
394 const char *buf
, size_t count
)
396 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
397 struct scsi_device
*sdp
= sdkp
->device
;
400 if (!capable(CAP_SYS_ADMIN
))
403 if (sd_is_zoned(sdkp
)) {
404 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
408 if (sdp
->type
!= TYPE_DISK
)
411 mode
= sysfs_match_string(lbp_mode
, buf
);
415 sd_config_discard(sdkp
, mode
);
419 static DEVICE_ATTR_RW(provisioning_mode
);
421 /* sysfs_match_string() requires dense arrays */
422 static const char *zeroing_mode
[] = {
423 [SD_ZERO_WRITE
] = "write",
424 [SD_ZERO_WS
] = "writesame",
425 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
426 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
430 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
433 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
435 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
439 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
440 const char *buf
, size_t count
)
442 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
445 if (!capable(CAP_SYS_ADMIN
))
448 mode
= sysfs_match_string(zeroing_mode
, buf
);
452 sdkp
->zeroing_mode
= mode
;
456 static DEVICE_ATTR_RW(zeroing_mode
);
459 max_medium_access_timeouts_show(struct device
*dev
,
460 struct device_attribute
*attr
, char *buf
)
462 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
464 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
468 max_medium_access_timeouts_store(struct device
*dev
,
469 struct device_attribute
*attr
, const char *buf
,
472 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
475 if (!capable(CAP_SYS_ADMIN
))
478 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
480 return err
? err
: count
;
482 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
485 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
488 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
490 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
494 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
495 const char *buf
, size_t count
)
497 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
498 struct scsi_device
*sdp
= sdkp
->device
;
502 if (!capable(CAP_SYS_ADMIN
))
505 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
508 err
= kstrtoul(buf
, 10, &max
);
514 sdp
->no_write_same
= 1;
515 else if (max
<= SD_MAX_WS16_BLOCKS
) {
516 sdp
->no_write_same
= 0;
517 sdkp
->max_ws_blocks
= max
;
520 sd_config_write_same(sdkp
);
524 static DEVICE_ATTR_RW(max_write_same_blocks
);
526 static struct attribute
*sd_disk_attrs
[] = {
527 &dev_attr_cache_type
.attr
,
529 &dev_attr_allow_restart
.attr
,
530 &dev_attr_manage_start_stop
.attr
,
531 &dev_attr_protection_type
.attr
,
532 &dev_attr_protection_mode
.attr
,
533 &dev_attr_app_tag_own
.attr
,
534 &dev_attr_thin_provisioning
.attr
,
535 &dev_attr_provisioning_mode
.attr
,
536 &dev_attr_zeroing_mode
.attr
,
537 &dev_attr_max_write_same_blocks
.attr
,
538 &dev_attr_max_medium_access_timeouts
.attr
,
541 ATTRIBUTE_GROUPS(sd_disk
);
543 static struct class sd_disk_class
= {
545 .owner
= THIS_MODULE
,
546 .dev_release
= scsi_disk_release
,
547 .dev_groups
= sd_disk_groups
,
550 static const struct dev_pm_ops sd_pm_ops
= {
551 .suspend
= sd_suspend_system
,
553 .poweroff
= sd_suspend_system
,
554 .restore
= sd_resume
,
555 .runtime_suspend
= sd_suspend_runtime
,
556 .runtime_resume
= sd_resume
,
559 static struct scsi_driver sd_template
= {
562 .owner
= THIS_MODULE
,
565 .shutdown
= sd_shutdown
,
569 .init_command
= sd_init_command
,
570 .uninit_command
= sd_uninit_command
,
572 .eh_action
= sd_eh_action
,
573 .eh_reset
= sd_eh_reset
,
577 * Dummy kobj_map->probe function.
578 * The default ->probe function will call modprobe, which is
579 * pointless as this module is already loaded.
581 static struct kobject
*sd_default_probe(dev_t devt
, int *partno
, void *data
)
587 * Device no to disk mapping:
589 * major disc2 disc p1
590 * |............|.............|....|....| <- dev_t
593 * Inside a major, we have 16k disks, however mapped non-
594 * contiguously. The first 16 disks are for major0, the next
595 * ones with major1, ... Disk 256 is for major0 again, disk 272
597 * As we stay compatible with our numbering scheme, we can reuse
598 * the well-know SCSI majors 8, 65--71, 136--143.
600 static int sd_major(int major_idx
)
604 return SCSI_DISK0_MAJOR
;
606 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
608 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
611 return 0; /* shut up gcc */
615 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
617 struct scsi_disk
*sdkp
= NULL
;
619 mutex_lock(&sd_ref_mutex
);
621 if (disk
->private_data
) {
622 sdkp
= scsi_disk(disk
);
623 if (scsi_device_get(sdkp
->device
) == 0)
624 get_device(&sdkp
->dev
);
628 mutex_unlock(&sd_ref_mutex
);
632 static void scsi_disk_put(struct scsi_disk
*sdkp
)
634 struct scsi_device
*sdev
= sdkp
->device
;
636 mutex_lock(&sd_ref_mutex
);
637 put_device(&sdkp
->dev
);
638 scsi_device_put(sdev
);
639 mutex_unlock(&sd_ref_mutex
);
642 #ifdef CONFIG_BLK_SED_OPAL
643 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
644 size_t len
, bool send
)
646 struct scsi_device
*sdev
= data
;
650 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
652 put_unaligned_be16(spsp
, &cdb
[2]);
653 put_unaligned_be32(len
, &cdb
[6]);
655 ret
= scsi_execute_req(sdev
, cdb
,
656 send
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
,
657 buffer
, len
, NULL
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
658 return ret
<= 0 ? ret
: -EIO
;
660 #endif /* CONFIG_BLK_SED_OPAL */
662 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
663 unsigned int dix
, unsigned int dif
)
665 struct bio
*bio
= scmd
->request
->bio
;
666 unsigned int prot_op
= sd_prot_op(rq_data_dir(scmd
->request
), dix
, dif
);
667 unsigned int protect
= 0;
669 if (dix
) { /* DIX Type 0, 1, 2, 3 */
670 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
671 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
673 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
674 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
677 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
678 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
680 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
681 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
684 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
685 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
687 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
688 protect
= 3 << 5; /* Disable target PI checking */
690 protect
= 1 << 5; /* Enable target PI checking */
693 scsi_set_prot_op(scmd
, prot_op
);
694 scsi_set_prot_type(scmd
, dif
);
695 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
700 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
702 struct request_queue
*q
= sdkp
->disk
->queue
;
703 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
704 unsigned int max_blocks
= 0;
706 q
->limits
.discard_alignment
=
707 sdkp
->unmap_alignment
* logical_block_size
;
708 q
->limits
.discard_granularity
=
709 max(sdkp
->physical_block_size
,
710 sdkp
->unmap_granularity
* logical_block_size
);
711 sdkp
->provisioning_mode
= mode
;
717 blk_queue_max_discard_sectors(q
, 0);
718 blk_queue_flag_clear(QUEUE_FLAG_DISCARD
, q
);
722 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
723 (u32
)SD_MAX_WS16_BLOCKS
);
727 if (sdkp
->device
->unmap_limit_for_ws
)
728 max_blocks
= sdkp
->max_unmap_blocks
;
730 max_blocks
= sdkp
->max_ws_blocks
;
732 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
736 if (sdkp
->device
->unmap_limit_for_ws
)
737 max_blocks
= sdkp
->max_unmap_blocks
;
739 max_blocks
= sdkp
->max_ws_blocks
;
741 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
745 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
746 (u32
)SD_MAX_WS10_BLOCKS
);
750 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
751 blk_queue_flag_set(QUEUE_FLAG_DISCARD
, q
);
754 static blk_status_t
sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
756 struct scsi_device
*sdp
= cmd
->device
;
757 struct request
*rq
= cmd
->request
;
758 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
759 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
760 unsigned int data_len
= 24;
763 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
764 if (!rq
->special_vec
.bv_page
)
765 return BLK_STS_RESOURCE
;
766 clear_highpage(rq
->special_vec
.bv_page
);
767 rq
->special_vec
.bv_offset
= 0;
768 rq
->special_vec
.bv_len
= data_len
;
769 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
772 cmd
->cmnd
[0] = UNMAP
;
775 buf
= page_address(rq
->special_vec
.bv_page
);
776 put_unaligned_be16(6 + 16, &buf
[0]);
777 put_unaligned_be16(16, &buf
[2]);
778 put_unaligned_be64(sector
, &buf
[8]);
779 put_unaligned_be32(nr_sectors
, &buf
[16]);
781 cmd
->allowed
= SD_MAX_RETRIES
;
782 cmd
->transfersize
= data_len
;
783 rq
->timeout
= SD_TIMEOUT
;
784 scsi_req(rq
)->resid_len
= data_len
;
786 return scsi_init_io(cmd
);
789 static blk_status_t
sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
,
792 struct scsi_device
*sdp
= cmd
->device
;
793 struct request
*rq
= cmd
->request
;
794 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
795 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
796 u32 data_len
= sdp
->sector_size
;
798 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
799 if (!rq
->special_vec
.bv_page
)
800 return BLK_STS_RESOURCE
;
801 clear_highpage(rq
->special_vec
.bv_page
);
802 rq
->special_vec
.bv_offset
= 0;
803 rq
->special_vec
.bv_len
= data_len
;
804 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
807 cmd
->cmnd
[0] = WRITE_SAME_16
;
809 cmd
->cmnd
[1] = 0x8; /* UNMAP */
810 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
811 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
813 cmd
->allowed
= SD_MAX_RETRIES
;
814 cmd
->transfersize
= data_len
;
815 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
816 scsi_req(rq
)->resid_len
= data_len
;
818 return scsi_init_io(cmd
);
821 static blk_status_t
sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
,
824 struct scsi_device
*sdp
= cmd
->device
;
825 struct request
*rq
= cmd
->request
;
826 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
827 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
828 u32 data_len
= sdp
->sector_size
;
830 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
831 if (!rq
->special_vec
.bv_page
)
832 return BLK_STS_RESOURCE
;
833 clear_highpage(rq
->special_vec
.bv_page
);
834 rq
->special_vec
.bv_offset
= 0;
835 rq
->special_vec
.bv_len
= data_len
;
836 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
839 cmd
->cmnd
[0] = WRITE_SAME
;
841 cmd
->cmnd
[1] = 0x8; /* UNMAP */
842 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
843 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
845 cmd
->allowed
= SD_MAX_RETRIES
;
846 cmd
->transfersize
= data_len
;
847 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
848 scsi_req(rq
)->resid_len
= data_len
;
850 return scsi_init_io(cmd
);
853 static blk_status_t
sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
855 struct request
*rq
= cmd
->request
;
856 struct scsi_device
*sdp
= cmd
->device
;
857 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
858 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
859 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
861 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
862 switch (sdkp
->zeroing_mode
) {
863 case SD_ZERO_WS16_UNMAP
:
864 return sd_setup_write_same16_cmnd(cmd
, true);
865 case SD_ZERO_WS10_UNMAP
:
866 return sd_setup_write_same10_cmnd(cmd
, true);
870 if (sdp
->no_write_same
)
871 return BLK_STS_TARGET
;
873 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff)
874 return sd_setup_write_same16_cmnd(cmd
, false);
876 return sd_setup_write_same10_cmnd(cmd
, false);
879 static void sd_config_write_same(struct scsi_disk
*sdkp
)
881 struct request_queue
*q
= sdkp
->disk
->queue
;
882 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
884 if (sdkp
->device
->no_write_same
) {
885 sdkp
->max_ws_blocks
= 0;
889 /* Some devices can not handle block counts above 0xffff despite
890 * supporting WRITE SAME(16). Consequently we default to 64k
891 * blocks per I/O unless the device explicitly advertises a
894 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
895 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
896 (u32
)SD_MAX_WS16_BLOCKS
);
897 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
898 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
899 (u32
)SD_MAX_WS10_BLOCKS
);
901 sdkp
->device
->no_write_same
= 1;
902 sdkp
->max_ws_blocks
= 0;
905 if (sdkp
->lbprz
&& sdkp
->lbpws
)
906 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
907 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
908 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
909 else if (sdkp
->max_ws_blocks
)
910 sdkp
->zeroing_mode
= SD_ZERO_WS
;
912 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
914 if (sdkp
->max_ws_blocks
&&
915 sdkp
->physical_block_size
> logical_block_size
) {
917 * Reporting a maximum number of blocks that is not aligned
918 * on the device physical size would cause a large write same
919 * request to be split into physically unaligned chunks by
920 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
921 * even if the caller of these functions took care to align the
922 * large request. So make sure the maximum reported is aligned
923 * to the device physical block size. This is only an optional
924 * optimization for regular disks, but this is mandatory to
925 * avoid failure of large write same requests directed at
926 * sequential write required zones of host-managed ZBC disks.
928 sdkp
->max_ws_blocks
=
929 round_down(sdkp
->max_ws_blocks
,
930 bytes_to_logical(sdkp
->device
,
931 sdkp
->physical_block_size
));
935 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
936 (logical_block_size
>> 9));
937 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
938 (logical_block_size
>> 9));
942 * sd_setup_write_same_cmnd - write the same data to multiple blocks
943 * @cmd: command to prepare
945 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
946 * the preference indicated by the target device.
948 static blk_status_t
sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
950 struct request
*rq
= cmd
->request
;
951 struct scsi_device
*sdp
= cmd
->device
;
952 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
953 struct bio
*bio
= rq
->bio
;
954 sector_t sector
= blk_rq_pos(rq
);
955 unsigned int nr_sectors
= blk_rq_sectors(rq
);
956 unsigned int nr_bytes
= blk_rq_bytes(rq
);
959 if (sdkp
->device
->no_write_same
)
960 return BLK_STS_TARGET
;
962 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
964 sector
>>= ilog2(sdp
->sector_size
) - 9;
965 nr_sectors
>>= ilog2(sdp
->sector_size
) - 9;
967 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
969 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff) {
971 cmd
->cmnd
[0] = WRITE_SAME_16
;
972 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
973 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
976 cmd
->cmnd
[0] = WRITE_SAME
;
977 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
978 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
981 cmd
->transfersize
= sdp
->sector_size
;
982 cmd
->allowed
= SD_MAX_RETRIES
;
985 * For WRITE SAME the data transferred via the DATA OUT buffer is
986 * different from the amount of data actually written to the target.
988 * We set up __data_len to the amount of data transferred via the
989 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
990 * to transfer a single sector of data first, but then reset it to
991 * the amount of data to be written right after so that the I/O path
992 * knows how much to actually write.
994 rq
->__data_len
= sdp
->sector_size
;
995 ret
= scsi_init_io(cmd
);
996 rq
->__data_len
= nr_bytes
;
1001 static blk_status_t
sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
1003 struct request
*rq
= cmd
->request
;
1005 /* flush requests don't perform I/O, zero the S/G table */
1006 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
1008 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
1010 cmd
->transfersize
= 0;
1011 cmd
->allowed
= SD_MAX_RETRIES
;
1013 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1017 static blk_status_t
sd_setup_read_write_cmnd(struct scsi_cmnd
*SCpnt
)
1019 struct request
*rq
= SCpnt
->request
;
1020 struct scsi_device
*sdp
= SCpnt
->device
;
1021 struct gendisk
*disk
= rq
->rq_disk
;
1022 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1023 sector_t block
= blk_rq_pos(rq
);
1025 unsigned int this_count
= blk_rq_sectors(rq
);
1026 unsigned int dif
, dix
;
1027 unsigned char protect
;
1030 ret
= scsi_init_io(SCpnt
);
1031 if (ret
!= BLK_STS_OK
)
1033 WARN_ON_ONCE(SCpnt
!= rq
->special
);
1036 scmd_printk(KERN_INFO
, SCpnt
,
1037 "%s: block=%llu, count=%d\n",
1038 __func__
, (unsigned long long)block
, this_count
));
1040 if (!sdp
|| !scsi_device_online(sdp
) ||
1041 block
+ blk_rq_sectors(rq
) > get_capacity(disk
)) {
1042 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1043 "Finishing %u sectors\n",
1044 blk_rq_sectors(rq
)));
1045 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1046 "Retry with 0x%p\n", SCpnt
));
1047 return BLK_STS_IOERR
;
1052 * quietly refuse to do anything to a changed disc until
1053 * the changed bit has been reset
1055 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
1056 return BLK_STS_IOERR
;
1060 * Some SD card readers can't handle multi-sector accesses which touch
1061 * the last one or two hardware sectors. Split accesses as needed.
1063 threshold
= get_capacity(disk
) - SD_LAST_BUGGY_SECTORS
*
1064 (sdp
->sector_size
/ 512);
1066 if (unlikely(sdp
->last_sector_bug
&& block
+ this_count
> threshold
)) {
1067 if (block
< threshold
) {
1068 /* Access up to the threshold but not beyond */
1069 this_count
= threshold
- block
;
1071 /* Access only a single hardware sector */
1072 this_count
= sdp
->sector_size
/ 512;
1076 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
, "block=%llu\n",
1077 (unsigned long long)block
));
1080 * If we have a 1K hardware sectorsize, prevent access to single
1081 * 512 byte sectors. In theory we could handle this - in fact
1082 * the scsi cdrom driver must be able to handle this because
1083 * we typically use 1K blocksizes, and cdroms typically have
1084 * 2K hardware sectorsizes. Of course, things are simpler
1085 * with the cdrom, since it is read-only. For performance
1086 * reasons, the filesystems should be able to handle this
1087 * and not force the scsi disk driver to use bounce buffers
1090 if (sdp
->sector_size
== 1024) {
1091 if ((block
& 1) || (blk_rq_sectors(rq
) & 1)) {
1092 scmd_printk(KERN_ERR
, SCpnt
,
1093 "Bad block number requested\n");
1094 return BLK_STS_IOERR
;
1097 this_count
= this_count
>> 1;
1099 if (sdp
->sector_size
== 2048) {
1100 if ((block
& 3) || (blk_rq_sectors(rq
) & 3)) {
1101 scmd_printk(KERN_ERR
, SCpnt
,
1102 "Bad block number requested\n");
1103 return BLK_STS_IOERR
;
1106 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");
1112 return BLK_STS_IOERR
;
1115 this_count
= this_count
>> 3;
1117 if (rq_data_dir(rq
) == WRITE
) {
1118 SCpnt
->cmnd
[0] = WRITE_6
;
1120 if (blk_integrity_rq(rq
))
1121 t10_pi_prepare(SCpnt
->request
, sdkp
->protection_type
);
1123 } else if (rq_data_dir(rq
) == READ
) {
1124 SCpnt
->cmnd
[0] = READ_6
;
1126 scmd_printk(KERN_ERR
, SCpnt
, "Unknown command %d\n", req_op(rq
));
1127 return BLK_STS_IOERR
;
1130 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1131 "%s %d/%u 512 byte blocks.\n",
1132 (rq_data_dir(rq
) == WRITE
) ?
1133 "writing" : "reading", this_count
,
1134 blk_rq_sectors(rq
)));
1136 dix
= scsi_prot_sg_count(SCpnt
);
1137 dif
= scsi_host_dif_capable(SCpnt
->device
->host
, sdkp
->protection_type
);
1140 protect
= sd_setup_protect_cmnd(SCpnt
, dix
, dif
);
1144 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1145 SCpnt
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1147 if (unlikely(!SCpnt
->cmnd
))
1148 return BLK_STS_RESOURCE
;
1150 SCpnt
->cmd_len
= SD_EXT_CDB_SIZE
;
1151 memset(SCpnt
->cmnd
, 0, SCpnt
->cmd_len
);
1152 SCpnt
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1153 SCpnt
->cmnd
[7] = 0x18;
1154 SCpnt
->cmnd
[9] = (rq_data_dir(rq
) == READ
) ? READ_32
: WRITE_32
;
1155 SCpnt
->cmnd
[10] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1158 SCpnt
->cmnd
[12] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1159 SCpnt
->cmnd
[13] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1160 SCpnt
->cmnd
[14] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1161 SCpnt
->cmnd
[15] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1162 SCpnt
->cmnd
[16] = (unsigned char) (block
>> 24) & 0xff;
1163 SCpnt
->cmnd
[17] = (unsigned char) (block
>> 16) & 0xff;
1164 SCpnt
->cmnd
[18] = (unsigned char) (block
>> 8) & 0xff;
1165 SCpnt
->cmnd
[19] = (unsigned char) block
& 0xff;
1167 /* Expected Indirect LBA */
1168 SCpnt
->cmnd
[20] = (unsigned char) (block
>> 24) & 0xff;
1169 SCpnt
->cmnd
[21] = (unsigned char) (block
>> 16) & 0xff;
1170 SCpnt
->cmnd
[22] = (unsigned char) (block
>> 8) & 0xff;
1171 SCpnt
->cmnd
[23] = (unsigned char) block
& 0xff;
1173 /* Transfer length */
1174 SCpnt
->cmnd
[28] = (unsigned char) (this_count
>> 24) & 0xff;
1175 SCpnt
->cmnd
[29] = (unsigned char) (this_count
>> 16) & 0xff;
1176 SCpnt
->cmnd
[30] = (unsigned char) (this_count
>> 8) & 0xff;
1177 SCpnt
->cmnd
[31] = (unsigned char) this_count
& 0xff;
1178 } else if (sdp
->use_16_for_rw
|| (this_count
> 0xffff)) {
1179 SCpnt
->cmnd
[0] += READ_16
- READ_6
;
1180 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1181 SCpnt
->cmnd
[2] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1182 SCpnt
->cmnd
[3] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1183 SCpnt
->cmnd
[4] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1184 SCpnt
->cmnd
[5] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1185 SCpnt
->cmnd
[6] = (unsigned char) (block
>> 24) & 0xff;
1186 SCpnt
->cmnd
[7] = (unsigned char) (block
>> 16) & 0xff;
1187 SCpnt
->cmnd
[8] = (unsigned char) (block
>> 8) & 0xff;
1188 SCpnt
->cmnd
[9] = (unsigned char) block
& 0xff;
1189 SCpnt
->cmnd
[10] = (unsigned char) (this_count
>> 24) & 0xff;
1190 SCpnt
->cmnd
[11] = (unsigned char) (this_count
>> 16) & 0xff;
1191 SCpnt
->cmnd
[12] = (unsigned char) (this_count
>> 8) & 0xff;
1192 SCpnt
->cmnd
[13] = (unsigned char) this_count
& 0xff;
1193 SCpnt
->cmnd
[14] = SCpnt
->cmnd
[15] = 0;
1194 } else if ((this_count
> 0xff) || (block
> 0x1fffff) ||
1195 scsi_device_protection(SCpnt
->device
) ||
1196 SCpnt
->device
->use_10_for_rw
) {
1197 SCpnt
->cmnd
[0] += READ_10
- READ_6
;
1198 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1199 SCpnt
->cmnd
[2] = (unsigned char) (block
>> 24) & 0xff;
1200 SCpnt
->cmnd
[3] = (unsigned char) (block
>> 16) & 0xff;
1201 SCpnt
->cmnd
[4] = (unsigned char) (block
>> 8) & 0xff;
1202 SCpnt
->cmnd
[5] = (unsigned char) block
& 0xff;
1203 SCpnt
->cmnd
[6] = SCpnt
->cmnd
[9] = 0;
1204 SCpnt
->cmnd
[7] = (unsigned char) (this_count
>> 8) & 0xff;
1205 SCpnt
->cmnd
[8] = (unsigned char) this_count
& 0xff;
1207 if (unlikely(rq
->cmd_flags
& REQ_FUA
)) {
1209 * This happens only if this drive failed
1210 * 10byte rw command with ILLEGAL_REQUEST
1211 * during operation and thus turned off
1214 scmd_printk(KERN_ERR
, SCpnt
,
1215 "FUA write on READ/WRITE(6) drive\n");
1216 return BLK_STS_IOERR
;
1219 SCpnt
->cmnd
[1] |= (unsigned char) ((block
>> 16) & 0x1f);
1220 SCpnt
->cmnd
[2] = (unsigned char) ((block
>> 8) & 0xff);
1221 SCpnt
->cmnd
[3] = (unsigned char) block
& 0xff;
1222 SCpnt
->cmnd
[4] = (unsigned char) this_count
;
1225 SCpnt
->sdb
.length
= this_count
* sdp
->sector_size
;
1228 * We shouldn't disconnect in the middle of a sector, so with a dumb
1229 * host adapter, it's safe to assume that we can at least transfer
1230 * this many bytes between each connect / disconnect.
1232 SCpnt
->transfersize
= sdp
->sector_size
;
1233 SCpnt
->underflow
= this_count
<< 9;
1234 SCpnt
->allowed
= SD_MAX_RETRIES
;
1237 * This indicates that the command is ready from our end to be
1243 static blk_status_t
sd_init_command(struct scsi_cmnd
*cmd
)
1245 struct request
*rq
= cmd
->request
;
1247 switch (req_op(rq
)) {
1248 case REQ_OP_DISCARD
:
1249 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1251 return sd_setup_unmap_cmnd(cmd
);
1253 return sd_setup_write_same16_cmnd(cmd
, true);
1255 return sd_setup_write_same10_cmnd(cmd
, true);
1257 return sd_setup_write_same10_cmnd(cmd
, false);
1259 return BLK_STS_TARGET
;
1261 case REQ_OP_WRITE_ZEROES
:
1262 return sd_setup_write_zeroes_cmnd(cmd
);
1263 case REQ_OP_WRITE_SAME
:
1264 return sd_setup_write_same_cmnd(cmd
);
1266 return sd_setup_flush_cmnd(cmd
);
1269 return sd_setup_read_write_cmnd(cmd
);
1270 case REQ_OP_ZONE_RESET
:
1271 return sd_zbc_setup_reset_cmnd(cmd
);
1274 return BLK_STS_NOTSUPP
;
1278 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1280 struct request
*rq
= SCpnt
->request
;
1283 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1284 mempool_free(rq
->special_vec
.bv_page
, sd_page_pool
);
1286 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1290 mempool_free(cmnd
, sd_cdb_pool
);
1295 * sd_open - open a scsi disk device
1296 * @bdev: Block device of the scsi disk to open
1297 * @mode: FMODE_* mask
1299 * Returns 0 if successful. Returns a negated errno value in case
1302 * Note: This can be called from a user context (e.g. fsck(1) )
1303 * or from within the kernel (e.g. as a result of a mount(1) ).
1304 * In the latter case @inode and @filp carry an abridged amount
1305 * of information as noted above.
1307 * Locking: called with bdev->bd_mutex held.
1309 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1311 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1312 struct scsi_device
*sdev
;
1318 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1320 sdev
= sdkp
->device
;
1323 * If the device is in error recovery, wait until it is done.
1324 * If the device is offline, then disallow any access to it.
1327 if (!scsi_block_when_processing_errors(sdev
))
1330 if (sdev
->removable
|| sdkp
->write_prot
)
1331 check_disk_change(bdev
);
1334 * If the drive is empty, just let the open fail.
1336 retval
= -ENOMEDIUM
;
1337 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1341 * If the device has the write protect tab set, have the open fail
1342 * if the user expects to be able to write to the thing.
1345 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1349 * It is possible that the disk changing stuff resulted in
1350 * the device being taken offline. If this is the case,
1351 * report this to the user, and don't pretend that the
1352 * open actually succeeded.
1355 if (!scsi_device_online(sdev
))
1358 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1359 if (scsi_block_when_processing_errors(sdev
))
1360 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1366 scsi_disk_put(sdkp
);
1371 * sd_release - invoked when the (last) close(2) is called on this
1373 * @disk: disk to release
1374 * @mode: FMODE_* mask
1378 * Note: may block (uninterruptible) if error recovery is underway
1381 * Locking: called with bdev->bd_mutex held.
1383 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1385 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1386 struct scsi_device
*sdev
= sdkp
->device
;
1388 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1390 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1391 if (scsi_block_when_processing_errors(sdev
))
1392 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1396 * XXX and what if there are packets in flight and this close()
1397 * XXX is followed by a "rmmod sd_mod"?
1400 scsi_disk_put(sdkp
);
1403 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1405 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1406 struct scsi_device
*sdp
= sdkp
->device
;
1407 struct Scsi_Host
*host
= sdp
->host
;
1408 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1411 /* default to most commonly used values */
1412 diskinfo
[0] = 0x40; /* 1 << 6 */
1413 diskinfo
[1] = 0x20; /* 1 << 5 */
1414 diskinfo
[2] = capacity
>> 11;
1416 /* override with calculated, extended default, or driver values */
1417 if (host
->hostt
->bios_param
)
1418 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1420 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1422 geo
->heads
= diskinfo
[0];
1423 geo
->sectors
= diskinfo
[1];
1424 geo
->cylinders
= diskinfo
[2];
1429 * sd_ioctl - process an ioctl
1430 * @bdev: target block device
1431 * @mode: FMODE_* mask
1432 * @cmd: ioctl command number
1433 * @arg: this is third argument given to ioctl(2) system call.
1434 * Often contains a pointer.
1436 * Returns 0 if successful (some ioctls return positive numbers on
1437 * success as well). Returns a negated errno value in case of error.
1439 * Note: most ioctls are forward onto the block subsystem or further
1440 * down in the scsi subsystem.
1442 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1443 unsigned int cmd
, unsigned long arg
)
1445 struct gendisk
*disk
= bdev
->bd_disk
;
1446 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1447 struct scsi_device
*sdp
= sdkp
->device
;
1448 void __user
*p
= (void __user
*)arg
;
1451 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1452 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1454 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1459 * If we are in the middle of error recovery, don't let anyone
1460 * else try and use this device. Also, if error recovery fails, it
1461 * may try and take the device offline, in which case all further
1462 * access to the device is prohibited.
1464 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1465 (mode
& FMODE_NDELAY
) != 0);
1469 if (is_sed_ioctl(cmd
))
1470 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1473 * Send SCSI addressing ioctls directly to mid level, send other
1474 * ioctls to block level and then onto mid level if they can't be
1478 case SCSI_IOCTL_GET_IDLUN
:
1479 case SCSI_IOCTL_GET_BUS_NUMBER
:
1480 error
= scsi_ioctl(sdp
, cmd
, p
);
1483 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1484 if (error
!= -ENOTTY
)
1486 error
= scsi_ioctl(sdp
, cmd
, p
);
1493 static void set_media_not_present(struct scsi_disk
*sdkp
)
1495 if (sdkp
->media_present
)
1496 sdkp
->device
->changed
= 1;
1498 if (sdkp
->device
->removable
) {
1499 sdkp
->media_present
= 0;
1504 static int media_not_present(struct scsi_disk
*sdkp
,
1505 struct scsi_sense_hdr
*sshdr
)
1507 if (!scsi_sense_valid(sshdr
))
1510 /* not invoked for commands that could return deferred errors */
1511 switch (sshdr
->sense_key
) {
1512 case UNIT_ATTENTION
:
1514 /* medium not present */
1515 if (sshdr
->asc
== 0x3A) {
1516 set_media_not_present(sdkp
);
1524 * sd_check_events - check media events
1525 * @disk: kernel device descriptor
1526 * @clearing: disk events currently being cleared
1528 * Returns mask of DISK_EVENT_*.
1530 * Note: this function is invoked from the block subsystem.
1532 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1534 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1535 struct scsi_device
*sdp
;
1542 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1545 * If the device is offline, don't send any commands - just pretend as
1546 * if the command failed. If the device ever comes back online, we
1547 * can deal with it then. It is only because of unrecoverable errors
1548 * that we would ever take a device offline in the first place.
1550 if (!scsi_device_online(sdp
)) {
1551 set_media_not_present(sdkp
);
1556 * Using TEST_UNIT_READY enables differentiation between drive with
1557 * no cartridge loaded - NOT READY, drive with changed cartridge -
1558 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1560 * Drives that auto spin down. eg iomega jaz 1G, will be started
1561 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1562 * sd_revalidate() is called.
1564 if (scsi_block_when_processing_errors(sdp
)) {
1565 struct scsi_sense_hdr sshdr
= { 0, };
1567 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1570 /* failed to execute TUR, assume media not present */
1571 if (host_byte(retval
)) {
1572 set_media_not_present(sdkp
);
1576 if (media_not_present(sdkp
, &sshdr
))
1581 * For removable scsi disk we have to recognise the presence
1582 * of a disk in the drive.
1584 if (!sdkp
->media_present
)
1586 sdkp
->media_present
= 1;
1589 * sdp->changed is set under the following conditions:
1591 * Medium present state has changed in either direction.
1592 * Device has indicated UNIT_ATTENTION.
1594 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1596 scsi_disk_put(sdkp
);
1600 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1603 struct scsi_device
*sdp
= sdkp
->device
;
1604 const int timeout
= sdp
->request_queue
->rq_timeout
1605 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1606 struct scsi_sense_hdr my_sshdr
;
1608 if (!scsi_device_online(sdp
))
1611 /* caller might not be interested in sense, but we need it */
1615 for (retries
= 3; retries
> 0; --retries
) {
1616 unsigned char cmd
[10] = { 0 };
1618 cmd
[0] = SYNCHRONIZE_CACHE
;
1620 * Leave the rest of the command zero to indicate
1623 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1624 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1630 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1632 if (driver_byte(res
) == DRIVER_SENSE
)
1633 sd_print_sense_hdr(sdkp
, sshdr
);
1635 /* we need to evaluate the error return */
1636 if (scsi_sense_valid(sshdr
) &&
1637 (sshdr
->asc
== 0x3a || /* medium not present */
1638 sshdr
->asc
== 0x20)) /* invalid command */
1639 /* this is no error here */
1642 switch (host_byte(res
)) {
1643 /* ignore errors due to racing a disconnection */
1644 case DID_BAD_TARGET
:
1645 case DID_NO_CONNECT
:
1647 /* signal the upper layer it might try again */
1651 case DID_SOFT_ERROR
:
1660 static void sd_rescan(struct device
*dev
)
1662 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1664 revalidate_disk(sdkp
->disk
);
1668 #ifdef CONFIG_COMPAT
1670 * This gets directly called from VFS. When the ioctl
1671 * is not recognized we go back to the other translation paths.
1673 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1674 unsigned int cmd
, unsigned long arg
)
1676 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1679 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1680 (mode
& FMODE_NDELAY
) != 0);
1685 * Let the static ioctl translation table take care of it.
1687 if (!sdev
->host
->hostt
->compat_ioctl
)
1688 return -ENOIOCTLCMD
;
1689 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1693 static char sd_pr_type(enum pr_type type
)
1696 case PR_WRITE_EXCLUSIVE
:
1698 case PR_EXCLUSIVE_ACCESS
:
1700 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1702 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1704 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1706 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1713 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1714 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1716 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1717 struct scsi_sense_hdr sshdr
;
1719 u8 cmd
[16] = { 0, };
1720 u8 data
[24] = { 0, };
1722 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1725 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1727 put_unaligned_be64(key
, &data
[0]);
1728 put_unaligned_be64(sa_key
, &data
[8]);
1731 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1732 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1734 if (driver_byte(result
) == DRIVER_SENSE
&&
1735 scsi_sense_valid(&sshdr
)) {
1736 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1737 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1743 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1746 if (flags
& ~PR_FL_IGNORE_KEY
)
1748 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1749 old_key
, new_key
, 0,
1750 (1 << 0) /* APTPL */);
1753 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1758 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1761 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1763 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1766 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1767 enum pr_type type
, bool abort
)
1769 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1770 sd_pr_type(type
), 0);
1773 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1775 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1778 static const struct pr_ops sd_pr_ops
= {
1779 .pr_register
= sd_pr_register
,
1780 .pr_reserve
= sd_pr_reserve
,
1781 .pr_release
= sd_pr_release
,
1782 .pr_preempt
= sd_pr_preempt
,
1783 .pr_clear
= sd_pr_clear
,
1786 static const struct block_device_operations sd_fops
= {
1787 .owner
= THIS_MODULE
,
1789 .release
= sd_release
,
1791 .getgeo
= sd_getgeo
,
1792 #ifdef CONFIG_COMPAT
1793 .compat_ioctl
= sd_compat_ioctl
,
1795 .check_events
= sd_check_events
,
1796 .revalidate_disk
= sd_revalidate_disk
,
1797 .unlock_native_capacity
= sd_unlock_native_capacity
,
1798 .report_zones
= sd_zbc_report_zones
,
1799 .pr_ops
= &sd_pr_ops
,
1803 * sd_eh_reset - reset error handling callback
1804 * @scmd: sd-issued command that has failed
1806 * This function is called by the SCSI midlayer before starting
1807 * SCSI EH. When counting medium access failures we have to be
1808 * careful to register it only only once per device and SCSI EH run;
1809 * there might be several timed out commands which will cause the
1810 * 'max_medium_access_timeouts' counter to trigger after the first
1811 * SCSI EH run already and set the device to offline.
1812 * So this function resets the internal counter before starting SCSI EH.
1814 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1816 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1818 /* New SCSI EH run, reset gate variable */
1819 sdkp
->ignore_medium_access_errors
= false;
1823 * sd_eh_action - error handling callback
1824 * @scmd: sd-issued command that has failed
1825 * @eh_disp: The recovery disposition suggested by the midlayer
1827 * This function is called by the SCSI midlayer upon completion of an
1828 * error test command (currently TEST UNIT READY). The result of sending
1829 * the eh command is passed in eh_disp. We're looking for devices that
1830 * fail medium access commands but are OK with non access commands like
1831 * test unit ready (so wrongly see the device as having a successful
1834 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1836 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1837 struct scsi_device
*sdev
= scmd
->device
;
1839 if (!scsi_device_online(sdev
) ||
1840 !scsi_medium_access_command(scmd
) ||
1841 host_byte(scmd
->result
) != DID_TIME_OUT
||
1846 * The device has timed out executing a medium access command.
1847 * However, the TEST UNIT READY command sent during error
1848 * handling completed successfully. Either the device is in the
1849 * process of recovering or has it suffered an internal failure
1850 * that prevents access to the storage medium.
1852 if (!sdkp
->ignore_medium_access_errors
) {
1853 sdkp
->medium_access_timed_out
++;
1854 sdkp
->ignore_medium_access_errors
= true;
1858 * If the device keeps failing read/write commands but TEST UNIT
1859 * READY always completes successfully we assume that medium
1860 * access is no longer possible and take the device offline.
1862 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1863 scmd_printk(KERN_ERR
, scmd
,
1864 "Medium access timeout failure. Offlining disk!\n");
1865 mutex_lock(&sdev
->state_mutex
);
1866 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1867 mutex_unlock(&sdev
->state_mutex
);
1875 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1877 struct request
*req
= scmd
->request
;
1878 struct scsi_device
*sdev
= scmd
->device
;
1879 unsigned int transferred
, good_bytes
;
1880 u64 start_lba
, end_lba
, bad_lba
;
1883 * Some commands have a payload smaller than the device logical
1884 * block size (e.g. INQUIRY on a 4K disk).
1886 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1889 /* Check if we have a 'bad_lba' information */
1890 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1891 SCSI_SENSE_BUFFERSIZE
,
1896 * If the bad lba was reported incorrectly, we have no idea where
1899 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1900 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1901 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1905 * resid is optional but mostly filled in. When it's unused,
1906 * its value is zero, so we assume the whole buffer transferred
1908 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1910 /* This computation should always be done in terms of the
1911 * resolution of the device's medium.
1913 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1915 return min(good_bytes
, transferred
);
1919 * sd_done - bottom half handler: called when the lower level
1920 * driver has completed (successfully or otherwise) a scsi command.
1921 * @SCpnt: mid-level's per command structure.
1923 * Note: potentially run from within an ISR. Must not block.
1925 static int sd_done(struct scsi_cmnd
*SCpnt
)
1927 int result
= SCpnt
->result
;
1928 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1929 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1931 struct scsi_sense_hdr sshdr
;
1932 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1933 struct request
*req
= SCpnt
->request
;
1934 int sense_valid
= 0;
1935 int sense_deferred
= 0;
1937 switch (req_op(req
)) {
1938 case REQ_OP_DISCARD
:
1939 case REQ_OP_WRITE_ZEROES
:
1940 case REQ_OP_WRITE_SAME
:
1941 case REQ_OP_ZONE_RESET
:
1943 good_bytes
= blk_rq_bytes(req
);
1944 scsi_set_resid(SCpnt
, 0);
1947 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1952 * In case of bogus fw or device, we could end up having
1953 * an unaligned partial completion. Check this here and force
1956 resid
= scsi_get_resid(SCpnt
);
1957 if (resid
& (sector_size
- 1)) {
1958 sd_printk(KERN_INFO
, sdkp
,
1959 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1960 resid
, sector_size
);
1961 resid
= min(scsi_bufflen(SCpnt
),
1962 round_up(resid
, sector_size
));
1963 scsi_set_resid(SCpnt
, resid
);
1968 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
1970 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
1972 sdkp
->medium_access_timed_out
= 0;
1974 if (driver_byte(result
) != DRIVER_SENSE
&&
1975 (!sense_valid
|| sense_deferred
))
1978 switch (sshdr
.sense_key
) {
1979 case HARDWARE_ERROR
:
1981 good_bytes
= sd_completed_bytes(SCpnt
);
1983 case RECOVERED_ERROR
:
1984 good_bytes
= scsi_bufflen(SCpnt
);
1987 /* This indicates a false check condition, so ignore it. An
1988 * unknown amount of data was transferred so treat it as an
1992 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
1994 case ABORTED_COMMAND
:
1995 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
1996 good_bytes
= sd_completed_bytes(SCpnt
);
1998 case ILLEGAL_REQUEST
:
1999 switch (sshdr
.asc
) {
2000 case 0x10: /* DIX: Host detected corruption */
2001 good_bytes
= sd_completed_bytes(SCpnt
);
2003 case 0x20: /* INVALID COMMAND OPCODE */
2004 case 0x24: /* INVALID FIELD IN CDB */
2005 switch (SCpnt
->cmnd
[0]) {
2007 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2011 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2012 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2014 sdkp
->device
->no_write_same
= 1;
2015 sd_config_write_same(sdkp
);
2016 req
->rq_flags
|= RQF_QUIET
;
2027 if (sd_is_zoned(sdkp
))
2028 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2030 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2031 "sd_done: completed %d of %d bytes\n",
2032 good_bytes
, scsi_bufflen(SCpnt
)));
2034 if (rq_data_dir(SCpnt
->request
) == READ
&& scsi_prot_sg_count(SCpnt
) &&
2036 t10_pi_complete(SCpnt
->request
, sdkp
->protection_type
,
2037 good_bytes
/ scsi_prot_interval(SCpnt
));
2043 * spinup disk - called only in sd_revalidate_disk()
2046 sd_spinup_disk(struct scsi_disk
*sdkp
)
2048 unsigned char cmd
[10];
2049 unsigned long spintime_expire
= 0;
2050 int retries
, spintime
;
2051 unsigned int the_result
;
2052 struct scsi_sense_hdr sshdr
;
2053 int sense_valid
= 0;
2057 /* Spin up drives, as required. Only do this at boot time */
2058 /* Spinup needs to be done for module loads too. */
2063 cmd
[0] = TEST_UNIT_READY
;
2064 memset((void *) &cmd
[1], 0, 9);
2066 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2069 SD_MAX_RETRIES
, NULL
);
2072 * If the drive has indicated to us that it
2073 * doesn't have any media in it, don't bother
2074 * with any more polling.
2076 if (media_not_present(sdkp
, &sshdr
))
2080 sense_valid
= scsi_sense_valid(&sshdr
);
2082 } while (retries
< 3 &&
2083 (!scsi_status_is_good(the_result
) ||
2084 ((driver_byte(the_result
) == DRIVER_SENSE
) &&
2085 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2087 if (driver_byte(the_result
) != DRIVER_SENSE
) {
2088 /* no sense, TUR either succeeded or failed
2089 * with a status error */
2090 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2091 sd_print_result(sdkp
, "Test Unit Ready failed",
2098 * The device does not want the automatic start to be issued.
2100 if (sdkp
->device
->no_start_on_add
)
2103 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2104 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2105 break; /* manual intervention required */
2106 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2107 break; /* standby */
2108 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2109 break; /* unavailable */
2110 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2111 break; /* sanitize in progress */
2113 * Issue command to spin up drive when not ready
2116 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2117 cmd
[0] = START_STOP
;
2118 cmd
[1] = 1; /* Return immediately */
2119 memset((void *) &cmd
[2], 0, 8);
2120 cmd
[4] = 1; /* Start spin cycle */
2121 if (sdkp
->device
->start_stop_pwr_cond
)
2123 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2125 SD_TIMEOUT
, SD_MAX_RETRIES
,
2127 spintime_expire
= jiffies
+ 100 * HZ
;
2130 /* Wait 1 second for next try */
2132 printk(KERN_CONT
".");
2135 * Wait for USB flash devices with slow firmware.
2136 * Yes, this sense key/ASC combination shouldn't
2137 * occur here. It's characteristic of these devices.
2139 } else if (sense_valid
&&
2140 sshdr
.sense_key
== UNIT_ATTENTION
&&
2141 sshdr
.asc
== 0x28) {
2143 spintime_expire
= jiffies
+ 5 * HZ
;
2146 /* Wait 1 second for next try */
2149 /* we don't understand the sense code, so it's
2150 * probably pointless to loop */
2152 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2153 sd_print_sense_hdr(sdkp
, &sshdr
);
2158 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2161 if (scsi_status_is_good(the_result
))
2162 printk(KERN_CONT
"ready\n");
2164 printk(KERN_CONT
"not responding...\n");
2169 * Determine whether disk supports Data Integrity Field.
2171 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2173 struct scsi_device
*sdp
= sdkp
->device
;
2177 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2180 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2182 if (type
> T10_PI_TYPE3_PROTECTION
)
2184 else if (scsi_host_dif_capable(sdp
->host
, type
))
2187 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2190 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2191 " protection type %u. Disabling disk!\n",
2195 sd_printk(KERN_NOTICE
, sdkp
,
2196 "Enabling DIF Type %u protection\n", type
);
2199 sd_printk(KERN_NOTICE
, sdkp
,
2200 "Disabling DIF Type %u protection\n", type
);
2204 sdkp
->protection_type
= type
;
2209 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2210 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2213 if (driver_byte(the_result
) == DRIVER_SENSE
)
2214 sd_print_sense_hdr(sdkp
, sshdr
);
2216 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2219 * Set dirty bit for removable devices if not ready -
2220 * sometimes drives will not report this properly.
2222 if (sdp
->removable
&&
2223 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2224 set_media_not_present(sdkp
);
2227 * We used to set media_present to 0 here to indicate no media
2228 * in the drive, but some drives fail read capacity even with
2229 * media present, so we can't do that.
2231 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2235 #if RC16_LEN > SD_BUF_SIZE
2236 #error RC16_LEN must not be more than SD_BUF_SIZE
2239 #define READ_CAPACITY_RETRIES_ON_RESET 10
2242 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2243 * and the reported logical block size is bigger than 512 bytes. Note
2244 * that last_sector is a u64 and therefore logical_to_sectors() is not
2247 static bool sd_addressable_capacity(u64 lba
, unsigned int sector_size
)
2249 u64 last_sector
= (lba
+ 1ULL) << (ilog2(sector_size
) - 9);
2251 if (sizeof(sector_t
) == 4 && last_sector
> U32_MAX
)
2257 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2258 unsigned char *buffer
)
2260 unsigned char cmd
[16];
2261 struct scsi_sense_hdr sshdr
;
2262 int sense_valid
= 0;
2264 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2265 unsigned int alignment
;
2266 unsigned long long lba
;
2267 unsigned sector_size
;
2269 if (sdp
->no_read_capacity_16
)
2274 cmd
[0] = SERVICE_ACTION_IN_16
;
2275 cmd
[1] = SAI_READ_CAPACITY_16
;
2277 memset(buffer
, 0, RC16_LEN
);
2279 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2280 buffer
, RC16_LEN
, &sshdr
,
2281 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2283 if (media_not_present(sdkp
, &sshdr
))
2287 sense_valid
= scsi_sense_valid(&sshdr
);
2289 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2290 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2292 /* Invalid Command Operation Code or
2293 * Invalid Field in CDB, just retry
2294 * silently with RC10 */
2297 sshdr
.sense_key
== UNIT_ATTENTION
&&
2298 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2299 /* Device reset might occur several times,
2300 * give it one more chance */
2301 if (--reset_retries
> 0)
2306 } while (the_result
&& retries
);
2309 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2310 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2314 sector_size
= get_unaligned_be32(&buffer
[8]);
2315 lba
= get_unaligned_be64(&buffer
[0]);
2317 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2322 if (!sd_addressable_capacity(lba
, sector_size
)) {
2323 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2324 "kernel compiled with support for large block "
2330 /* Logical blocks per physical block exponent */
2331 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2334 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2336 /* Lowest aligned logical block */
2337 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2338 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2339 if (alignment
&& sdkp
->first_scan
)
2340 sd_printk(KERN_NOTICE
, sdkp
,
2341 "physical block alignment offset: %u\n", alignment
);
2343 if (buffer
[14] & 0x80) { /* LBPME */
2346 if (buffer
[14] & 0x40) /* LBPRZ */
2349 sd_config_discard(sdkp
, SD_LBP_WS16
);
2352 sdkp
->capacity
= lba
+ 1;
2356 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2357 unsigned char *buffer
)
2359 unsigned char cmd
[16];
2360 struct scsi_sense_hdr sshdr
;
2361 int sense_valid
= 0;
2363 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2365 unsigned sector_size
;
2368 cmd
[0] = READ_CAPACITY
;
2369 memset(&cmd
[1], 0, 9);
2370 memset(buffer
, 0, 8);
2372 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2374 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2376 if (media_not_present(sdkp
, &sshdr
))
2380 sense_valid
= scsi_sense_valid(&sshdr
);
2382 sshdr
.sense_key
== UNIT_ATTENTION
&&
2383 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2384 /* Device reset might occur several times,
2385 * give it one more chance */
2386 if (--reset_retries
> 0)
2391 } while (the_result
&& retries
);
2394 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2395 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2399 sector_size
= get_unaligned_be32(&buffer
[4]);
2400 lba
= get_unaligned_be32(&buffer
[0]);
2402 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2403 /* Some buggy (usb cardreader) devices return an lba of
2404 0xffffffff when the want to report a size of 0 (with
2405 which they really mean no media is present) */
2407 sdkp
->physical_block_size
= sector_size
;
2411 if (!sd_addressable_capacity(lba
, sector_size
)) {
2412 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2413 "kernel compiled with support for large block "
2419 sdkp
->capacity
= lba
+ 1;
2420 sdkp
->physical_block_size
= sector_size
;
2424 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2426 if (sdp
->host
->max_cmd_len
< 16)
2428 if (sdp
->try_rc_10_first
)
2430 if (sdp
->scsi_level
> SCSI_SPC_2
)
2432 if (scsi_device_protection(sdp
))
2438 * read disk capacity
2441 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2444 struct scsi_device
*sdp
= sdkp
->device
;
2446 if (sd_try_rc16_first(sdp
)) {
2447 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2448 if (sector_size
== -EOVERFLOW
)
2450 if (sector_size
== -ENODEV
)
2452 if (sector_size
< 0)
2453 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2454 if (sector_size
< 0)
2457 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2458 if (sector_size
== -EOVERFLOW
)
2460 if (sector_size
< 0)
2462 if ((sizeof(sdkp
->capacity
) > 4) &&
2463 (sdkp
->capacity
> 0xffffffffULL
)) {
2464 int old_sector_size
= sector_size
;
2465 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2466 "Trying to use READ CAPACITY(16).\n");
2467 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2468 if (sector_size
< 0) {
2469 sd_printk(KERN_NOTICE
, sdkp
,
2470 "Using 0xffffffff as device size\n");
2471 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2472 sector_size
= old_sector_size
;
2475 /* Remember that READ CAPACITY(16) succeeded */
2476 sdp
->try_rc_10_first
= 0;
2480 /* Some devices are known to return the total number of blocks,
2481 * not the highest block number. Some devices have versions
2482 * which do this and others which do not. Some devices we might
2483 * suspect of doing this but we don't know for certain.
2485 * If we know the reported capacity is wrong, decrement it. If
2486 * we can only guess, then assume the number of blocks is even
2487 * (usually true but not always) and err on the side of lowering
2490 if (sdp
->fix_capacity
||
2491 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2492 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2493 "from its reported value: %llu\n",
2494 (unsigned long long) sdkp
->capacity
);
2499 if (sector_size
== 0) {
2501 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2505 if (sector_size
!= 512 &&
2506 sector_size
!= 1024 &&
2507 sector_size
!= 2048 &&
2508 sector_size
!= 4096) {
2509 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2512 * The user might want to re-format the drive with
2513 * a supported sectorsize. Once this happens, it
2514 * would be relatively trivial to set the thing up.
2515 * For this reason, we leave the thing in the table.
2519 * set a bogus sector size so the normal read/write
2520 * logic in the block layer will eventually refuse any
2521 * request on this device without tripping over power
2522 * of two sector size assumptions
2526 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2527 blk_queue_physical_block_size(sdp
->request_queue
,
2528 sdkp
->physical_block_size
);
2529 sdkp
->device
->sector_size
= sector_size
;
2531 if (sdkp
->capacity
> 0xffffffff)
2532 sdp
->use_16_for_rw
= 1;
2537 * Print disk capacity
2540 sd_print_capacity(struct scsi_disk
*sdkp
,
2541 sector_t old_capacity
)
2543 int sector_size
= sdkp
->device
->sector_size
;
2544 char cap_str_2
[10], cap_str_10
[10];
2546 string_get_size(sdkp
->capacity
, sector_size
,
2547 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2548 string_get_size(sdkp
->capacity
, sector_size
,
2549 STRING_UNITS_10
, cap_str_10
,
2550 sizeof(cap_str_10
));
2552 if (sdkp
->first_scan
|| old_capacity
!= sdkp
->capacity
) {
2553 sd_printk(KERN_NOTICE
, sdkp
,
2554 "%llu %d-byte logical blocks: (%s/%s)\n",
2555 (unsigned long long)sdkp
->capacity
,
2556 sector_size
, cap_str_10
, cap_str_2
);
2558 if (sdkp
->physical_block_size
!= sector_size
)
2559 sd_printk(KERN_NOTICE
, sdkp
,
2560 "%u-byte physical blocks\n",
2561 sdkp
->physical_block_size
);
2563 sd_zbc_print_zones(sdkp
);
2567 /* called with buffer of length 512 */
2569 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2570 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2571 struct scsi_sense_hdr
*sshdr
)
2573 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2574 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2579 * read write protect setting, if possible - called only in sd_revalidate_disk()
2580 * called with buffer of length SD_BUF_SIZE
2583 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2586 struct scsi_device
*sdp
= sdkp
->device
;
2587 struct scsi_mode_data data
;
2588 int disk_ro
= get_disk_ro(sdkp
->disk
);
2589 int old_wp
= sdkp
->write_prot
;
2591 set_disk_ro(sdkp
->disk
, 0);
2592 if (sdp
->skip_ms_page_3f
) {
2593 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2597 if (sdp
->use_192_bytes_for_3f
) {
2598 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2601 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2602 * We have to start carefully: some devices hang if we ask
2603 * for more than is available.
2605 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2608 * Second attempt: ask for page 0 When only page 0 is
2609 * implemented, a request for page 3F may return Sense Key
2610 * 5: Illegal Request, Sense Code 24: Invalid field in
2613 if (!scsi_status_is_good(res
))
2614 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2617 * Third attempt: ask 255 bytes, as we did earlier.
2619 if (!scsi_status_is_good(res
))
2620 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2624 if (!scsi_status_is_good(res
)) {
2625 sd_first_printk(KERN_WARNING
, sdkp
,
2626 "Test WP failed, assume Write Enabled\n");
2628 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2629 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
|| disk_ro
);
2630 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2631 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2632 sdkp
->write_prot
? "on" : "off");
2633 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2639 * sd_read_cache_type - called only from sd_revalidate_disk()
2640 * called with buffer of length SD_BUF_SIZE
2643 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2646 struct scsi_device
*sdp
= sdkp
->device
;
2651 struct scsi_mode_data data
;
2652 struct scsi_sense_hdr sshdr
;
2653 int old_wce
= sdkp
->WCE
;
2654 int old_rcd
= sdkp
->RCD
;
2655 int old_dpofua
= sdkp
->DPOFUA
;
2658 if (sdkp
->cache_override
)
2662 if (sdp
->skip_ms_page_8
) {
2663 if (sdp
->type
== TYPE_RBC
)
2666 if (sdp
->skip_ms_page_3f
)
2669 if (sdp
->use_192_bytes_for_3f
)
2673 } else if (sdp
->type
== TYPE_RBC
) {
2681 /* cautiously ask */
2682 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2685 if (!scsi_status_is_good(res
))
2688 if (!data
.header_length
) {
2691 sd_first_printk(KERN_ERR
, sdkp
,
2692 "Missing header in MODE_SENSE response\n");
2695 /* that went OK, now ask for the proper length */
2699 * We're only interested in the first three bytes, actually.
2700 * But the data cache page is defined for the first 20.
2704 else if (len
> SD_BUF_SIZE
) {
2705 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2706 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2709 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2713 if (len
> first_len
)
2714 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2717 if (scsi_status_is_good(res
)) {
2718 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2720 while (offset
< len
) {
2721 u8 page_code
= buffer
[offset
] & 0x3F;
2722 u8 spf
= buffer
[offset
] & 0x40;
2724 if (page_code
== 8 || page_code
== 6) {
2725 /* We're interested only in the first 3 bytes.
2727 if (len
- offset
<= 2) {
2728 sd_first_printk(KERN_ERR
, sdkp
,
2729 "Incomplete mode parameter "
2733 modepage
= page_code
;
2737 /* Go to the next page */
2738 if (spf
&& len
- offset
> 3)
2739 offset
+= 4 + (buffer
[offset
+2] << 8) +
2741 else if (!spf
&& len
- offset
> 1)
2742 offset
+= 2 + buffer
[offset
+1];
2744 sd_first_printk(KERN_ERR
, sdkp
,
2746 "parameter data\n");
2752 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2756 if (modepage
== 8) {
2757 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2758 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2760 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2764 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2765 if (sdp
->broken_fua
) {
2766 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2768 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2769 !sdkp
->device
->use_16_for_rw
) {
2770 sd_first_printk(KERN_NOTICE
, sdkp
,
2771 "Uses READ/WRITE(6), disabling FUA\n");
2775 /* No cache flush allowed for write protected devices */
2776 if (sdkp
->WCE
&& sdkp
->write_prot
)
2779 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2780 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2781 sd_printk(KERN_NOTICE
, sdkp
,
2782 "Write cache: %s, read cache: %s, %s\n",
2783 sdkp
->WCE
? "enabled" : "disabled",
2784 sdkp
->RCD
? "disabled" : "enabled",
2785 sdkp
->DPOFUA
? "supports DPO and FUA"
2786 : "doesn't support DPO or FUA");
2792 if (scsi_sense_valid(&sshdr
) &&
2793 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2794 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2795 /* Invalid field in CDB */
2796 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2798 sd_first_printk(KERN_ERR
, sdkp
,
2799 "Asking for cache data failed\n");
2802 if (sdp
->wce_default_on
) {
2803 sd_first_printk(KERN_NOTICE
, sdkp
,
2804 "Assuming drive cache: write back\n");
2807 sd_first_printk(KERN_ERR
, sdkp
,
2808 "Assuming drive cache: write through\n");
2816 * The ATO bit indicates whether the DIF application tag is available
2817 * for use by the operating system.
2819 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2822 struct scsi_device
*sdp
= sdkp
->device
;
2823 struct scsi_mode_data data
;
2824 struct scsi_sense_hdr sshdr
;
2826 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2829 if (sdkp
->protection_type
== 0)
2832 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2833 SD_MAX_RETRIES
, &data
, &sshdr
);
2835 if (!scsi_status_is_good(res
) || !data
.header_length
||
2837 sd_first_printk(KERN_WARNING
, sdkp
,
2838 "getting Control mode page failed, assume no ATO\n");
2840 if (scsi_sense_valid(&sshdr
))
2841 sd_print_sense_hdr(sdkp
, &sshdr
);
2846 offset
= data
.header_length
+ data
.block_descriptor_length
;
2848 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2849 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2853 if ((buffer
[offset
+ 5] & 0x80) == 0)
2862 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2863 * @sdkp: disk to query
2865 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2867 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2868 const int vpd_len
= 64;
2869 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2872 /* Block Limits VPD */
2873 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2876 blk_queue_io_min(sdkp
->disk
->queue
,
2877 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2879 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2880 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2882 if (buffer
[3] == 0x3c) {
2883 unsigned int lba_count
, desc_count
;
2885 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2890 lba_count
= get_unaligned_be32(&buffer
[20]);
2891 desc_count
= get_unaligned_be32(&buffer
[24]);
2893 if (lba_count
&& desc_count
)
2894 sdkp
->max_unmap_blocks
= lba_count
;
2896 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2898 if (buffer
[32] & 0x80)
2899 sdkp
->unmap_alignment
=
2900 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2902 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2904 if (sdkp
->max_unmap_blocks
)
2905 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2907 sd_config_discard(sdkp
, SD_LBP_WS16
);
2909 } else { /* LBP VPD page tells us what to use */
2910 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2911 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2912 else if (sdkp
->lbpws
)
2913 sd_config_discard(sdkp
, SD_LBP_WS16
);
2914 else if (sdkp
->lbpws10
)
2915 sd_config_discard(sdkp
, SD_LBP_WS10
);
2917 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2926 * sd_read_block_characteristics - Query block dev. characteristics
2927 * @sdkp: disk to query
2929 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2931 struct request_queue
*q
= sdkp
->disk
->queue
;
2932 unsigned char *buffer
;
2934 const int vpd_len
= 64;
2936 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2939 /* Block Device Characteristics VPD */
2940 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2943 rot
= get_unaligned_be16(&buffer
[4]);
2946 blk_queue_flag_set(QUEUE_FLAG_NONROT
, q
);
2947 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM
, q
);
2949 blk_queue_flag_clear(QUEUE_FLAG_NONROT
, q
);
2950 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM
, q
);
2953 if (sdkp
->device
->type
== TYPE_ZBC
) {
2955 q
->limits
.zoned
= BLK_ZONED_HM
;
2957 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2958 if (sdkp
->zoned
== 1)
2960 q
->limits
.zoned
= BLK_ZONED_HA
;
2963 * Treat drive-managed devices as
2964 * regular block devices.
2966 q
->limits
.zoned
= BLK_ZONED_NONE
;
2968 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
2969 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
2970 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
2977 * sd_read_block_provisioning - Query provisioning VPD page
2978 * @sdkp: disk to query
2980 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
2982 unsigned char *buffer
;
2983 const int vpd_len
= 8;
2985 if (sdkp
->lbpme
== 0)
2988 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2990 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
2994 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
2995 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2996 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3002 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3004 struct scsi_device
*sdev
= sdkp
->device
;
3006 if (sdev
->host
->no_write_same
) {
3007 sdev
->no_write_same
= 1;
3012 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3013 /* too large values might cause issues with arcmsr */
3014 int vpd_buf_len
= 64;
3016 sdev
->no_report_opcodes
= 1;
3018 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3019 * CODES is unsupported and the device has an ATA
3020 * Information VPD page (SAT).
3022 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3023 sdev
->no_write_same
= 1;
3026 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3029 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3033 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3035 struct scsi_device
*sdev
= sdkp
->device
;
3037 if (!sdev
->security_supported
)
3040 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3041 SECURITY_PROTOCOL_IN
) == 1 &&
3042 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3043 SECURITY_PROTOCOL_OUT
) == 1)
3048 * sd_revalidate_disk - called the first time a new disk is seen,
3049 * performs disk spin up, read_capacity, etc.
3050 * @disk: struct gendisk we care about
3052 static int sd_revalidate_disk(struct gendisk
*disk
)
3054 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3055 struct scsi_device
*sdp
= sdkp
->device
;
3056 struct request_queue
*q
= sdkp
->disk
->queue
;
3057 sector_t old_capacity
= sdkp
->capacity
;
3058 unsigned char *buffer
;
3059 unsigned int dev_max
, rw_max
;
3061 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3062 "sd_revalidate_disk\n"));
3065 * If the device is offline, don't try and read capacity or any
3066 * of the other niceties.
3068 if (!scsi_device_online(sdp
))
3071 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3073 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3074 "allocation failure.\n");
3078 sd_spinup_disk(sdkp
);
3081 * Without media there is no reason to ask; moreover, some devices
3082 * react badly if we do.
3084 if (sdkp
->media_present
) {
3085 sd_read_capacity(sdkp
, buffer
);
3087 if (scsi_device_supports_vpd(sdp
)) {
3088 sd_read_block_provisioning(sdkp
);
3089 sd_read_block_limits(sdkp
);
3090 sd_read_block_characteristics(sdkp
);
3091 sd_zbc_read_zones(sdkp
, buffer
);
3094 sd_print_capacity(sdkp
, old_capacity
);
3096 sd_read_write_protect_flag(sdkp
, buffer
);
3097 sd_read_cache_type(sdkp
, buffer
);
3098 sd_read_app_tag_own(sdkp
, buffer
);
3099 sd_read_write_same(sdkp
, buffer
);
3100 sd_read_security(sdkp
, buffer
);
3104 * We now have all cache related info, determine how we deal
3105 * with flush requests.
3107 sd_set_flush_flag(sdkp
);
3109 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3110 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3112 /* Some devices report a maximum block count for READ/WRITE requests. */
3113 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3114 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3117 * Determine the device's preferred I/O size for reads and writes
3118 * unless the reported value is unreasonably small, large, or
3121 if (sdkp
->opt_xfer_blocks
&&
3122 sdkp
->opt_xfer_blocks
<= dev_max
&&
3123 sdkp
->opt_xfer_blocks
<= SD_DEF_XFER_BLOCKS
&&
3124 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
) >= PAGE_SIZE
) {
3125 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3126 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3128 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3129 (sector_t
)BLK_DEF_MAX_SECTORS
);
3131 /* Do not exceed controller limit */
3132 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3135 * Only update max_sectors if previously unset or if the current value
3136 * exceeds the capabilities of the hardware.
3138 if (sdkp
->first_scan
||
3139 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3140 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3141 q
->limits
.max_sectors
= rw_max
;
3143 sdkp
->first_scan
= 0;
3145 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3146 sd_config_write_same(sdkp
);
3154 * sd_unlock_native_capacity - unlock native capacity
3155 * @disk: struct gendisk to set capacity for
3157 * Block layer calls this function if it detects that partitions
3158 * on @disk reach beyond the end of the device. If the SCSI host
3159 * implements ->unlock_native_capacity() method, it's invoked to
3160 * give it a chance to adjust the device capacity.
3163 * Defined by block layer. Might sleep.
3165 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3167 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3169 if (sdev
->host
->hostt
->unlock_native_capacity
)
3170 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3174 * sd_format_disk_name - format disk name
3175 * @prefix: name prefix - ie. "sd" for SCSI disks
3176 * @index: index of the disk to format name for
3177 * @buf: output buffer
3178 * @buflen: length of the output buffer
3180 * SCSI disk names starts at sda. The 26th device is sdz and the
3181 * 27th is sdaa. The last one for two lettered suffix is sdzz
3182 * which is followed by sdaaa.
3184 * This is basically 26 base counting with one extra 'nil' entry
3185 * at the beginning from the second digit on and can be
3186 * determined using similar method as 26 base conversion with the
3187 * index shifted -1 after each digit is computed.
3193 * 0 on success, -errno on failure.
3195 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3197 const int base
= 'z' - 'a' + 1;
3198 char *begin
= buf
+ strlen(prefix
);
3199 char *end
= buf
+ buflen
;
3209 *--p
= 'a' + (index
% unit
);
3210 index
= (index
/ unit
) - 1;
3211 } while (index
>= 0);
3213 memmove(begin
, p
, end
- p
);
3214 memcpy(buf
, prefix
, strlen(prefix
));
3220 * The asynchronous part of sd_probe
3222 static void sd_probe_async(void *data
, async_cookie_t cookie
)
3224 struct scsi_disk
*sdkp
= data
;
3225 struct scsi_device
*sdp
;
3232 index
= sdkp
->index
;
3233 dev
= &sdp
->sdev_gendev
;
3235 gd
->major
= sd_major((index
& 0xf0) >> 4);
3236 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3238 gd
->fops
= &sd_fops
;
3239 gd
->private_data
= &sdkp
->driver
;
3240 gd
->queue
= sdkp
->device
->request_queue
;
3242 /* defaults, until the device tells us otherwise */
3243 sdp
->sector_size
= 512;
3245 sdkp
->media_present
= 1;
3246 sdkp
->write_prot
= 0;
3247 sdkp
->cache_override
= 0;
3251 sdkp
->first_scan
= 1;
3252 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3254 sd_revalidate_disk(gd
);
3256 gd
->flags
= GENHD_FL_EXT_DEVT
;
3257 if (sdp
->removable
) {
3258 gd
->flags
|= GENHD_FL_REMOVABLE
;
3259 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3262 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3263 device_add_disk(dev
, gd
, NULL
);
3265 sd_dif_config_host(sdkp
);
3267 sd_revalidate_disk(gd
);
3269 if (sdkp
->security
) {
3270 sdkp
->opal_dev
= init_opal_dev(sdp
, &sd_sec_submit
);
3272 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3275 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3276 sdp
->removable
? "removable " : "");
3277 scsi_autopm_put_device(sdp
);
3278 put_device(&sdkp
->dev
);
3282 * sd_probe - called during driver initialization and whenever a
3283 * new scsi device is attached to the system. It is called once
3284 * for each scsi device (not just disks) present.
3285 * @dev: pointer to device object
3287 * Returns 0 if successful (or not interested in this scsi device
3288 * (e.g. scanner)); 1 when there is an error.
3290 * Note: this function is invoked from the scsi mid-level.
3291 * This function sets up the mapping between a given
3292 * <host,channel,id,lun> (found in sdp) and new device name
3293 * (e.g. /dev/sda). More precisely it is the block device major
3294 * and minor number that is chosen here.
3296 * Assume sd_probe is not re-entrant (for time being)
3297 * Also think about sd_probe() and sd_remove() running coincidentally.
3299 static int sd_probe(struct device
*dev
)
3301 struct scsi_device
*sdp
= to_scsi_device(dev
);
3302 struct scsi_disk
*sdkp
;
3307 scsi_autopm_get_device(sdp
);
3309 if (sdp
->type
!= TYPE_DISK
&&
3310 sdp
->type
!= TYPE_ZBC
&&
3311 sdp
->type
!= TYPE_MOD
&&
3312 sdp
->type
!= TYPE_RBC
)
3315 #ifndef CONFIG_BLK_DEV_ZONED
3316 if (sdp
->type
== TYPE_ZBC
)
3319 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3323 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3327 gd
= alloc_disk(SD_MINORS
);
3331 index
= ida_alloc(&sd_index_ida
, GFP_KERNEL
);
3333 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3337 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3339 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3340 goto out_free_index
;
3344 sdkp
->driver
= &sd_template
;
3346 sdkp
->index
= index
;
3347 atomic_set(&sdkp
->openers
, 0);
3348 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3350 if (!sdp
->request_queue
->rq_timeout
) {
3351 if (sdp
->type
!= TYPE_MOD
)
3352 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3354 blk_queue_rq_timeout(sdp
->request_queue
,
3358 device_initialize(&sdkp
->dev
);
3359 sdkp
->dev
.parent
= dev
;
3360 sdkp
->dev
.class = &sd_disk_class
;
3361 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3363 error
= device_add(&sdkp
->dev
);
3365 goto out_free_index
;
3368 dev_set_drvdata(dev
, sdkp
);
3370 get_device(&sdkp
->dev
); /* prevent release before async_schedule */
3371 async_schedule_domain(sd_probe_async
, sdkp
, &scsi_sd_probe_domain
);
3376 ida_free(&sd_index_ida
, index
);
3382 scsi_autopm_put_device(sdp
);
3387 * sd_remove - called whenever a scsi disk (previously recognized by
3388 * sd_probe) is detached from the system. It is called (potentially
3389 * multiple times) during sd module unload.
3390 * @dev: pointer to device object
3392 * Note: this function is invoked from the scsi mid-level.
3393 * This function potentially frees up a device name (e.g. /dev/sdc)
3394 * that could be re-used by a subsequent sd_probe().
3395 * This function is not called when the built-in sd driver is "exit-ed".
3397 static int sd_remove(struct device
*dev
)
3399 struct scsi_disk
*sdkp
;
3402 sdkp
= dev_get_drvdata(dev
);
3403 devt
= disk_devt(sdkp
->disk
);
3404 scsi_autopm_get_device(sdkp
->device
);
3406 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3407 async_synchronize_full_domain(&scsi_sd_probe_domain
);
3408 device_del(&sdkp
->dev
);
3409 del_gendisk(sdkp
->disk
);
3412 free_opal_dev(sdkp
->opal_dev
);
3414 blk_register_region(devt
, SD_MINORS
, NULL
,
3415 sd_default_probe
, NULL
, NULL
);
3417 mutex_lock(&sd_ref_mutex
);
3418 dev_set_drvdata(dev
, NULL
);
3419 put_device(&sdkp
->dev
);
3420 mutex_unlock(&sd_ref_mutex
);
3426 * scsi_disk_release - Called to free the scsi_disk structure
3427 * @dev: pointer to embedded class device
3429 * sd_ref_mutex must be held entering this routine. Because it is
3430 * called on last put, you should always use the scsi_disk_get()
3431 * scsi_disk_put() helpers which manipulate the semaphore directly
3432 * and never do a direct put_device.
3434 static void scsi_disk_release(struct device
*dev
)
3436 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3437 struct gendisk
*disk
= sdkp
->disk
;
3439 ida_free(&sd_index_ida
, sdkp
->index
);
3441 disk
->private_data
= NULL
;
3443 put_device(&sdkp
->device
->sdev_gendev
);
3448 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3450 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3451 struct scsi_sense_hdr sshdr
;
3452 struct scsi_device
*sdp
= sdkp
->device
;
3456 cmd
[4] |= 1; /* START */
3458 if (sdp
->start_stop_pwr_cond
)
3459 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3461 if (!scsi_device_online(sdp
))
3464 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3465 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3467 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3468 if (driver_byte(res
) == DRIVER_SENSE
)
3469 sd_print_sense_hdr(sdkp
, &sshdr
);
3470 if (scsi_sense_valid(&sshdr
) &&
3471 /* 0x3a is medium not present */
3476 /* SCSI error codes must not go to the generic layer */
3484 * Send a SYNCHRONIZE CACHE instruction down to the device through
3485 * the normal SCSI command structure. Wait for the command to
3488 static void sd_shutdown(struct device
*dev
)
3490 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3493 return; /* this can happen */
3495 if (pm_runtime_suspended(dev
))
3498 if (sdkp
->WCE
&& sdkp
->media_present
) {
3499 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3500 sd_sync_cache(sdkp
, NULL
);
3503 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3504 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3505 sd_start_stop_device(sdkp
, 0);
3509 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3511 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3512 struct scsi_sense_hdr sshdr
;
3515 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3518 if (sdkp
->WCE
&& sdkp
->media_present
) {
3519 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3520 ret
= sd_sync_cache(sdkp
, &sshdr
);
3523 /* ignore OFFLINE device */
3527 if (!scsi_sense_valid(&sshdr
) ||
3528 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3532 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3533 * doesn't support sync. There's not much to do and
3534 * suspend shouldn't fail.
3540 if (sdkp
->device
->manage_start_stop
) {
3541 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3542 /* an error is not worth aborting a system sleep */
3543 ret
= sd_start_stop_device(sdkp
, 0);
3544 if (ignore_stop_errors
)
3551 static int sd_suspend_system(struct device
*dev
)
3553 return sd_suspend_common(dev
, true);
3556 static int sd_suspend_runtime(struct device
*dev
)
3558 return sd_suspend_common(dev
, false);
3561 static int sd_resume(struct device
*dev
)
3563 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3566 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3569 if (!sdkp
->device
->manage_start_stop
)
3572 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3573 ret
= sd_start_stop_device(sdkp
, 1);
3575 opal_unlock_from_suspend(sdkp
->opal_dev
);
3580 * init_sd - entry point for this driver (both when built in or when
3583 * Note: this function registers this driver with the scsi mid-level.
3585 static int __init
init_sd(void)
3587 int majors
= 0, i
, err
;
3589 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3591 for (i
= 0; i
< SD_MAJORS
; i
++) {
3592 if (register_blkdev(sd_major(i
), "sd") != 0)
3595 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3596 sd_default_probe
, NULL
, NULL
);
3602 err
= class_register(&sd_disk_class
);
3606 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3608 if (!sd_cdb_cache
) {
3609 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3614 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3616 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3621 sd_page_pool
= mempool_create_page_pool(SD_MEMPOOL_SIZE
, 0);
3622 if (!sd_page_pool
) {
3623 printk(KERN_ERR
"sd: can't init discard page pool\n");
3628 err
= scsi_register_driver(&sd_template
.gendrv
);
3630 goto err_out_driver
;
3635 mempool_destroy(sd_page_pool
);
3638 mempool_destroy(sd_cdb_pool
);
3641 kmem_cache_destroy(sd_cdb_cache
);
3644 class_unregister(&sd_disk_class
);
3646 for (i
= 0; i
< SD_MAJORS
; i
++)
3647 unregister_blkdev(sd_major(i
), "sd");
3652 * exit_sd - exit point for this driver (when it is a module).
3654 * Note: this function unregisters this driver from the scsi mid-level.
3656 static void __exit
exit_sd(void)
3660 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3662 scsi_unregister_driver(&sd_template
.gendrv
);
3663 mempool_destroy(sd_cdb_pool
);
3664 mempool_destroy(sd_page_pool
);
3665 kmem_cache_destroy(sd_cdb_cache
);
3667 class_unregister(&sd_disk_class
);
3669 for (i
= 0; i
< SD_MAJORS
; i
++) {
3670 blk_unregister_region(sd_major(i
), SD_MINORS
);
3671 unregister_blkdev(sd_major(i
), "sd");
3675 module_init(init_sd
);
3676 module_exit(exit_sd
);
3678 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3679 struct scsi_sense_hdr
*sshdr
)
3681 scsi_print_sense_hdr(sdkp
->device
,
3682 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3685 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3688 const char *hb_string
= scsi_hostbyte_string(result
);
3689 const char *db_string
= scsi_driverbyte_string(result
);
3691 if (hb_string
|| db_string
)
3692 sd_printk(KERN_INFO
, sdkp
,
3693 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3694 hb_string
? hb_string
: "invalid",
3695 db_string
? db_string
: "invalid");
3697 sd_printk(KERN_INFO
, sdkp
,
3698 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3699 msg
, host_byte(result
), driver_byte(result
));