2 * sd.c Copyright (C) 1992 Drew Eckhardt
3 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
5 * Linux scsi disk driver
6 * Initial versions: Drew Eckhardt
7 * Subsequent revisions: Eric Youngdale
8 * Modification history:
9 * - Drew Eckhardt <drew@colorado.edu> original
10 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
11 * outstanding request, and other enhancements.
12 * Support loadable low-level scsi drivers.
13 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
14 * eight major numbers.
15 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
16 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
17 * sd_init and cleanups.
18 * - Alex Davis <letmein@erols.com> Fix problem where partition info
19 * not being read in sd_open. Fix problem where removable media
20 * could be ejected after sd_open.
21 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
22 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
23 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
24 * Support 32k/1M disks.
26 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
27 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
28 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
29 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
30 * - entering other commands: SCSI_LOG_HLQUEUE level 3
31 * Note: when the logging level is set by the user, it must be greater
32 * than the level indicated above to trigger output.
35 #include <linux/module.h>
37 #include <linux/kernel.h>
39 #include <linux/bio.h>
40 #include <linux/genhd.h>
41 #include <linux/hdreg.h>
42 #include <linux/errno.h>
43 #include <linux/idr.h>
44 #include <linux/interrupt.h>
45 #include <linux/init.h>
46 #include <linux/blkdev.h>
47 #include <linux/blkpg.h>
48 #include <linux/delay.h>
49 #include <linux/mutex.h>
50 #include <linux/string_helpers.h>
51 #include <linux/async.h>
52 #include <linux/slab.h>
53 #include <linux/sed-opal.h>
54 #include <linux/pm_runtime.h>
56 #include <linux/t10-pi.h>
57 #include <linux/uaccess.h>
58 #include <asm/unaligned.h>
60 #include <scsi/scsi.h>
61 #include <scsi/scsi_cmnd.h>
62 #include <scsi/scsi_dbg.h>
63 #include <scsi/scsi_device.h>
64 #include <scsi/scsi_driver.h>
65 #include <scsi/scsi_eh.h>
66 #include <scsi/scsi_host.h>
67 #include <scsi/scsi_ioctl.h>
68 #include <scsi/scsicam.h>
71 #include "scsi_priv.h"
72 #include "scsi_logging.h"
74 MODULE_AUTHOR("Eric Youngdale");
75 MODULE_DESCRIPTION("SCSI disk (sd) driver");
76 MODULE_LICENSE("GPL");
78 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
79 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
94 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
95 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
99 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
105 static void sd_config_discard(struct scsi_disk
*, unsigned int);
106 static void sd_config_write_same(struct scsi_disk
*);
107 static int sd_revalidate_disk(struct gendisk
*);
108 static void sd_unlock_native_capacity(struct gendisk
*disk
);
109 static int sd_probe(struct device
*);
110 static int sd_remove(struct device
*);
111 static void sd_shutdown(struct device
*);
112 static int sd_suspend_system(struct device
*);
113 static int sd_suspend_runtime(struct device
*);
114 static int sd_resume(struct device
*);
115 static void sd_rescan(struct device
*);
116 static int sd_init_command(struct scsi_cmnd
*SCpnt
);
117 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
118 static int sd_done(struct scsi_cmnd
*);
119 static void sd_eh_reset(struct scsi_cmnd
*);
120 static int sd_eh_action(struct scsi_cmnd
*, int);
121 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
122 static void scsi_disk_release(struct device
*cdev
);
123 static void sd_print_sense_hdr(struct scsi_disk
*, struct scsi_sense_hdr
*);
124 static void sd_print_result(const struct scsi_disk
*, const char *, int);
126 static DEFINE_SPINLOCK(sd_index_lock
);
127 static DEFINE_IDA(sd_index_ida
);
129 /* This semaphore is used to mediate the 0->1 reference get in the
130 * face of object destruction (i.e. we can't allow a get on an
131 * object after last put) */
132 static DEFINE_MUTEX(sd_ref_mutex
);
134 static struct kmem_cache
*sd_cdb_cache
;
135 static mempool_t
*sd_cdb_pool
;
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 queue_flag_clear_unlocked(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 queue_flag_set_unlocked(QUEUE_FLAG_DISCARD
, q
);
754 static int 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 BLKPREP_DEFER
;
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 int sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
791 struct scsi_device
*sdp
= cmd
->device
;
792 struct request
*rq
= cmd
->request
;
793 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
794 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
795 u32 data_len
= sdp
->sector_size
;
797 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
798 if (!rq
->special_vec
.bv_page
)
799 return BLKPREP_DEFER
;
800 clear_highpage(rq
->special_vec
.bv_page
);
801 rq
->special_vec
.bv_offset
= 0;
802 rq
->special_vec
.bv_len
= data_len
;
803 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
806 cmd
->cmnd
[0] = WRITE_SAME_16
;
808 cmd
->cmnd
[1] = 0x8; /* UNMAP */
809 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
810 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
812 cmd
->allowed
= SD_MAX_RETRIES
;
813 cmd
->transfersize
= data_len
;
814 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
815 scsi_req(rq
)->resid_len
= data_len
;
817 return scsi_init_io(cmd
);
820 static int sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
822 struct scsi_device
*sdp
= cmd
->device
;
823 struct request
*rq
= cmd
->request
;
824 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
825 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
826 u32 data_len
= sdp
->sector_size
;
828 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
829 if (!rq
->special_vec
.bv_page
)
830 return BLKPREP_DEFER
;
831 clear_highpage(rq
->special_vec
.bv_page
);
832 rq
->special_vec
.bv_offset
= 0;
833 rq
->special_vec
.bv_len
= data_len
;
834 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
837 cmd
->cmnd
[0] = WRITE_SAME
;
839 cmd
->cmnd
[1] = 0x8; /* UNMAP */
840 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
841 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
843 cmd
->allowed
= SD_MAX_RETRIES
;
844 cmd
->transfersize
= data_len
;
845 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
846 scsi_req(rq
)->resid_len
= data_len
;
848 return scsi_init_io(cmd
);
851 static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
853 struct request
*rq
= cmd
->request
;
854 struct scsi_device
*sdp
= cmd
->device
;
855 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
856 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
857 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
860 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
861 switch (sdkp
->zeroing_mode
) {
862 case SD_ZERO_WS16_UNMAP
:
863 ret
= sd_setup_write_same16_cmnd(cmd
, true);
865 case SD_ZERO_WS10_UNMAP
:
866 ret
= sd_setup_write_same10_cmnd(cmd
, true);
871 if (sdp
->no_write_same
)
872 return BLKPREP_INVALID
;
874 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff)
875 ret
= sd_setup_write_same16_cmnd(cmd
, false);
877 ret
= sd_setup_write_same10_cmnd(cmd
, false);
880 if (sd_is_zoned(sdkp
) && ret
== BLKPREP_OK
)
881 return sd_zbc_write_lock_zone(cmd
);
886 static void sd_config_write_same(struct scsi_disk
*sdkp
)
888 struct request_queue
*q
= sdkp
->disk
->queue
;
889 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
891 if (sdkp
->device
->no_write_same
) {
892 sdkp
->max_ws_blocks
= 0;
896 /* Some devices can not handle block counts above 0xffff despite
897 * supporting WRITE SAME(16). Consequently we default to 64k
898 * blocks per I/O unless the device explicitly advertises a
901 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
902 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
903 (u32
)SD_MAX_WS16_BLOCKS
);
904 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
905 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
906 (u32
)SD_MAX_WS10_BLOCKS
);
908 sdkp
->device
->no_write_same
= 1;
909 sdkp
->max_ws_blocks
= 0;
912 if (sdkp
->lbprz
&& sdkp
->lbpws
)
913 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
914 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
915 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
916 else if (sdkp
->max_ws_blocks
)
917 sdkp
->zeroing_mode
= SD_ZERO_WS
;
919 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
921 if (sdkp
->max_ws_blocks
&&
922 sdkp
->physical_block_size
> logical_block_size
) {
924 * Reporting a maximum number of blocks that is not aligned
925 * on the device physical size would cause a large write same
926 * request to be split into physically unaligned chunks by
927 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
928 * even if the caller of these functions took care to align the
929 * large request. So make sure the maximum reported is aligned
930 * to the device physical block size. This is only an optional
931 * optimization for regular disks, but this is mandatory to
932 * avoid failure of large write same requests directed at
933 * sequential write required zones of host-managed ZBC disks.
935 sdkp
->max_ws_blocks
=
936 round_down(sdkp
->max_ws_blocks
,
937 bytes_to_logical(sdkp
->device
,
938 sdkp
->physical_block_size
));
942 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
943 (logical_block_size
>> 9));
944 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
945 (logical_block_size
>> 9));
949 * sd_setup_write_same_cmnd - write the same data to multiple blocks
950 * @cmd: command to prepare
952 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
953 * the preference indicated by the target device.
955 static int sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
957 struct request
*rq
= cmd
->request
;
958 struct scsi_device
*sdp
= cmd
->device
;
959 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
960 struct bio
*bio
= rq
->bio
;
961 sector_t sector
= blk_rq_pos(rq
);
962 unsigned int nr_sectors
= blk_rq_sectors(rq
);
963 unsigned int nr_bytes
= blk_rq_bytes(rq
);
966 if (sdkp
->device
->no_write_same
)
967 return BLKPREP_INVALID
;
969 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
971 if (sd_is_zoned(sdkp
)) {
972 ret
= sd_zbc_write_lock_zone(cmd
);
973 if (ret
!= BLKPREP_OK
)
977 sector
>>= ilog2(sdp
->sector_size
) - 9;
978 nr_sectors
>>= ilog2(sdp
->sector_size
) - 9;
980 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
982 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff) {
984 cmd
->cmnd
[0] = WRITE_SAME_16
;
985 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
986 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
989 cmd
->cmnd
[0] = WRITE_SAME
;
990 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
991 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
994 cmd
->transfersize
= sdp
->sector_size
;
995 cmd
->allowed
= SD_MAX_RETRIES
;
998 * For WRITE SAME the data transferred via the DATA OUT buffer is
999 * different from the amount of data actually written to the target.
1001 * We set up __data_len to the amount of data transferred via the
1002 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1003 * to transfer a single sector of data first, but then reset it to
1004 * the amount of data to be written right after so that the I/O path
1005 * knows how much to actually write.
1007 rq
->__data_len
= sdp
->sector_size
;
1008 ret
= scsi_init_io(cmd
);
1009 rq
->__data_len
= nr_bytes
;
1011 if (sd_is_zoned(sdkp
) && ret
!= BLKPREP_OK
)
1012 sd_zbc_write_unlock_zone(cmd
);
1017 static int sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
1019 struct request
*rq
= cmd
->request
;
1021 /* flush requests don't perform I/O, zero the S/G table */
1022 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
1024 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
1026 cmd
->transfersize
= 0;
1027 cmd
->allowed
= SD_MAX_RETRIES
;
1029 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1033 static int sd_setup_read_write_cmnd(struct scsi_cmnd
*SCpnt
)
1035 struct request
*rq
= SCpnt
->request
;
1036 struct scsi_device
*sdp
= SCpnt
->device
;
1037 struct gendisk
*disk
= rq
->rq_disk
;
1038 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1039 sector_t block
= blk_rq_pos(rq
);
1041 unsigned int this_count
= blk_rq_sectors(rq
);
1042 unsigned int dif
, dix
;
1043 bool zoned_write
= sd_is_zoned(sdkp
) && rq_data_dir(rq
) == WRITE
;
1045 unsigned char protect
;
1048 ret
= sd_zbc_write_lock_zone(SCpnt
);
1049 if (ret
!= BLKPREP_OK
)
1053 ret
= scsi_init_io(SCpnt
);
1054 if (ret
!= BLKPREP_OK
)
1056 WARN_ON_ONCE(SCpnt
!= rq
->special
);
1058 /* from here on until we're complete, any goto out
1059 * is used for a killable error condition */
1063 scmd_printk(KERN_INFO
, SCpnt
,
1064 "%s: block=%llu, count=%d\n",
1065 __func__
, (unsigned long long)block
, this_count
));
1067 if (!sdp
|| !scsi_device_online(sdp
) ||
1068 block
+ blk_rq_sectors(rq
) > get_capacity(disk
)) {
1069 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1070 "Finishing %u sectors\n",
1071 blk_rq_sectors(rq
)));
1072 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1073 "Retry with 0x%p\n", SCpnt
));
1079 * quietly refuse to do anything to a changed disc until
1080 * the changed bit has been reset
1082 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
1087 * Some SD card readers can't handle multi-sector accesses which touch
1088 * the last one or two hardware sectors. Split accesses as needed.
1090 threshold
= get_capacity(disk
) - SD_LAST_BUGGY_SECTORS
*
1091 (sdp
->sector_size
/ 512);
1093 if (unlikely(sdp
->last_sector_bug
&& block
+ this_count
> threshold
)) {
1094 if (block
< threshold
) {
1095 /* Access up to the threshold but not beyond */
1096 this_count
= threshold
- block
;
1098 /* Access only a single hardware sector */
1099 this_count
= sdp
->sector_size
/ 512;
1103 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
, "block=%llu\n",
1104 (unsigned long long)block
));
1107 * If we have a 1K hardware sectorsize, prevent access to single
1108 * 512 byte sectors. In theory we could handle this - in fact
1109 * the scsi cdrom driver must be able to handle this because
1110 * we typically use 1K blocksizes, and cdroms typically have
1111 * 2K hardware sectorsizes. Of course, things are simpler
1112 * with the cdrom, since it is read-only. For performance
1113 * reasons, the filesystems should be able to handle this
1114 * and not force the scsi disk driver to use bounce buffers
1117 if (sdp
->sector_size
== 1024) {
1118 if ((block
& 1) || (blk_rq_sectors(rq
) & 1)) {
1119 scmd_printk(KERN_ERR
, SCpnt
,
1120 "Bad block number requested\n");
1124 this_count
= this_count
>> 1;
1127 if (sdp
->sector_size
== 2048) {
1128 if ((block
& 3) || (blk_rq_sectors(rq
) & 3)) {
1129 scmd_printk(KERN_ERR
, SCpnt
,
1130 "Bad block number requested\n");
1134 this_count
= this_count
>> 2;
1137 if (sdp
->sector_size
== 4096) {
1138 if ((block
& 7) || (blk_rq_sectors(rq
) & 7)) {
1139 scmd_printk(KERN_ERR
, SCpnt
,
1140 "Bad block number requested\n");
1144 this_count
= this_count
>> 3;
1147 if (rq_data_dir(rq
) == WRITE
) {
1148 SCpnt
->cmnd
[0] = WRITE_6
;
1150 if (blk_integrity_rq(rq
))
1151 sd_dif_prepare(SCpnt
);
1153 } else if (rq_data_dir(rq
) == READ
) {
1154 SCpnt
->cmnd
[0] = READ_6
;
1156 scmd_printk(KERN_ERR
, SCpnt
, "Unknown command %d\n", req_op(rq
));
1160 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1161 "%s %d/%u 512 byte blocks.\n",
1162 (rq_data_dir(rq
) == WRITE
) ?
1163 "writing" : "reading", this_count
,
1164 blk_rq_sectors(rq
)));
1166 dix
= scsi_prot_sg_count(SCpnt
);
1167 dif
= scsi_host_dif_capable(SCpnt
->device
->host
, sdkp
->protection_type
);
1170 protect
= sd_setup_protect_cmnd(SCpnt
, dix
, dif
);
1174 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1175 SCpnt
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1177 if (unlikely(SCpnt
->cmnd
== NULL
)) {
1178 ret
= BLKPREP_DEFER
;
1182 SCpnt
->cmd_len
= SD_EXT_CDB_SIZE
;
1183 memset(SCpnt
->cmnd
, 0, SCpnt
->cmd_len
);
1184 SCpnt
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1185 SCpnt
->cmnd
[7] = 0x18;
1186 SCpnt
->cmnd
[9] = (rq_data_dir(rq
) == READ
) ? READ_32
: WRITE_32
;
1187 SCpnt
->cmnd
[10] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1190 SCpnt
->cmnd
[12] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1191 SCpnt
->cmnd
[13] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1192 SCpnt
->cmnd
[14] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1193 SCpnt
->cmnd
[15] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1194 SCpnt
->cmnd
[16] = (unsigned char) (block
>> 24) & 0xff;
1195 SCpnt
->cmnd
[17] = (unsigned char) (block
>> 16) & 0xff;
1196 SCpnt
->cmnd
[18] = (unsigned char) (block
>> 8) & 0xff;
1197 SCpnt
->cmnd
[19] = (unsigned char) block
& 0xff;
1199 /* Expected Indirect LBA */
1200 SCpnt
->cmnd
[20] = (unsigned char) (block
>> 24) & 0xff;
1201 SCpnt
->cmnd
[21] = (unsigned char) (block
>> 16) & 0xff;
1202 SCpnt
->cmnd
[22] = (unsigned char) (block
>> 8) & 0xff;
1203 SCpnt
->cmnd
[23] = (unsigned char) block
& 0xff;
1205 /* Transfer length */
1206 SCpnt
->cmnd
[28] = (unsigned char) (this_count
>> 24) & 0xff;
1207 SCpnt
->cmnd
[29] = (unsigned char) (this_count
>> 16) & 0xff;
1208 SCpnt
->cmnd
[30] = (unsigned char) (this_count
>> 8) & 0xff;
1209 SCpnt
->cmnd
[31] = (unsigned char) this_count
& 0xff;
1210 } else if (sdp
->use_16_for_rw
|| (this_count
> 0xffff)) {
1211 SCpnt
->cmnd
[0] += READ_16
- READ_6
;
1212 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1213 SCpnt
->cmnd
[2] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1214 SCpnt
->cmnd
[3] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1215 SCpnt
->cmnd
[4] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1216 SCpnt
->cmnd
[5] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1217 SCpnt
->cmnd
[6] = (unsigned char) (block
>> 24) & 0xff;
1218 SCpnt
->cmnd
[7] = (unsigned char) (block
>> 16) & 0xff;
1219 SCpnt
->cmnd
[8] = (unsigned char) (block
>> 8) & 0xff;
1220 SCpnt
->cmnd
[9] = (unsigned char) block
& 0xff;
1221 SCpnt
->cmnd
[10] = (unsigned char) (this_count
>> 24) & 0xff;
1222 SCpnt
->cmnd
[11] = (unsigned char) (this_count
>> 16) & 0xff;
1223 SCpnt
->cmnd
[12] = (unsigned char) (this_count
>> 8) & 0xff;
1224 SCpnt
->cmnd
[13] = (unsigned char) this_count
& 0xff;
1225 SCpnt
->cmnd
[14] = SCpnt
->cmnd
[15] = 0;
1226 } else if ((this_count
> 0xff) || (block
> 0x1fffff) ||
1227 scsi_device_protection(SCpnt
->device
) ||
1228 SCpnt
->device
->use_10_for_rw
) {
1229 SCpnt
->cmnd
[0] += READ_10
- READ_6
;
1230 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1231 SCpnt
->cmnd
[2] = (unsigned char) (block
>> 24) & 0xff;
1232 SCpnt
->cmnd
[3] = (unsigned char) (block
>> 16) & 0xff;
1233 SCpnt
->cmnd
[4] = (unsigned char) (block
>> 8) & 0xff;
1234 SCpnt
->cmnd
[5] = (unsigned char) block
& 0xff;
1235 SCpnt
->cmnd
[6] = SCpnt
->cmnd
[9] = 0;
1236 SCpnt
->cmnd
[7] = (unsigned char) (this_count
>> 8) & 0xff;
1237 SCpnt
->cmnd
[8] = (unsigned char) this_count
& 0xff;
1239 if (unlikely(rq
->cmd_flags
& REQ_FUA
)) {
1241 * This happens only if this drive failed
1242 * 10byte rw command with ILLEGAL_REQUEST
1243 * during operation and thus turned off
1246 scmd_printk(KERN_ERR
, SCpnt
,
1247 "FUA write on READ/WRITE(6) drive\n");
1251 SCpnt
->cmnd
[1] |= (unsigned char) ((block
>> 16) & 0x1f);
1252 SCpnt
->cmnd
[2] = (unsigned char) ((block
>> 8) & 0xff);
1253 SCpnt
->cmnd
[3] = (unsigned char) block
& 0xff;
1254 SCpnt
->cmnd
[4] = (unsigned char) this_count
;
1257 SCpnt
->sdb
.length
= this_count
* sdp
->sector_size
;
1260 * We shouldn't disconnect in the middle of a sector, so with a dumb
1261 * host adapter, it's safe to assume that we can at least transfer
1262 * this many bytes between each connect / disconnect.
1264 SCpnt
->transfersize
= sdp
->sector_size
;
1265 SCpnt
->underflow
= this_count
<< 9;
1266 SCpnt
->allowed
= SD_MAX_RETRIES
;
1269 * This indicates that the command is ready from our end to be
1274 if (zoned_write
&& ret
!= BLKPREP_OK
)
1275 sd_zbc_write_unlock_zone(SCpnt
);
1280 static int sd_init_command(struct scsi_cmnd
*cmd
)
1282 struct request
*rq
= cmd
->request
;
1284 switch (req_op(rq
)) {
1285 case REQ_OP_DISCARD
:
1286 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1288 return sd_setup_unmap_cmnd(cmd
);
1290 return sd_setup_write_same16_cmnd(cmd
, true);
1292 return sd_setup_write_same10_cmnd(cmd
, true);
1294 return sd_setup_write_same10_cmnd(cmd
, false);
1296 return BLKPREP_INVALID
;
1298 case REQ_OP_WRITE_ZEROES
:
1299 return sd_setup_write_zeroes_cmnd(cmd
);
1300 case REQ_OP_WRITE_SAME
:
1301 return sd_setup_write_same_cmnd(cmd
);
1303 return sd_setup_flush_cmnd(cmd
);
1306 return sd_setup_read_write_cmnd(cmd
);
1307 case REQ_OP_ZONE_REPORT
:
1308 return sd_zbc_setup_report_cmnd(cmd
);
1309 case REQ_OP_ZONE_RESET
:
1310 return sd_zbc_setup_reset_cmnd(cmd
);
1313 return BLKPREP_KILL
;
1317 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1319 struct request
*rq
= SCpnt
->request
;
1322 if (SCpnt
->flags
& SCMD_ZONE_WRITE_LOCK
)
1323 sd_zbc_write_unlock_zone(SCpnt
);
1325 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1326 mempool_free(rq
->special_vec
.bv_page
, sd_page_pool
);
1328 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1332 mempool_free(cmnd
, sd_cdb_pool
);
1337 * sd_open - open a scsi disk device
1338 * @bdev: Block device of the scsi disk to open
1339 * @mode: FMODE_* mask
1341 * Returns 0 if successful. Returns a negated errno value in case
1344 * Note: This can be called from a user context (e.g. fsck(1) )
1345 * or from within the kernel (e.g. as a result of a mount(1) ).
1346 * In the latter case @inode and @filp carry an abridged amount
1347 * of information as noted above.
1349 * Locking: called with bdev->bd_mutex held.
1351 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1353 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1354 struct scsi_device
*sdev
;
1360 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1362 sdev
= sdkp
->device
;
1365 * If the device is in error recovery, wait until it is done.
1366 * If the device is offline, then disallow any access to it.
1369 if (!scsi_block_when_processing_errors(sdev
))
1372 if (sdev
->removable
|| sdkp
->write_prot
)
1373 check_disk_change(bdev
);
1376 * If the drive is empty, just let the open fail.
1378 retval
= -ENOMEDIUM
;
1379 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1383 * If the device has the write protect tab set, have the open fail
1384 * if the user expects to be able to write to the thing.
1387 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1391 * It is possible that the disk changing stuff resulted in
1392 * the device being taken offline. If this is the case,
1393 * report this to the user, and don't pretend that the
1394 * open actually succeeded.
1397 if (!scsi_device_online(sdev
))
1400 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1401 if (scsi_block_when_processing_errors(sdev
))
1402 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1408 scsi_disk_put(sdkp
);
1413 * sd_release - invoked when the (last) close(2) is called on this
1415 * @disk: disk to release
1416 * @mode: FMODE_* mask
1420 * Note: may block (uninterruptible) if error recovery is underway
1423 * Locking: called with bdev->bd_mutex held.
1425 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1427 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1428 struct scsi_device
*sdev
= sdkp
->device
;
1430 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1432 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1433 if (scsi_block_when_processing_errors(sdev
))
1434 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1438 * XXX and what if there are packets in flight and this close()
1439 * XXX is followed by a "rmmod sd_mod"?
1442 scsi_disk_put(sdkp
);
1445 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1447 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1448 struct scsi_device
*sdp
= sdkp
->device
;
1449 struct Scsi_Host
*host
= sdp
->host
;
1450 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1453 /* default to most commonly used values */
1454 diskinfo
[0] = 0x40; /* 1 << 6 */
1455 diskinfo
[1] = 0x20; /* 1 << 5 */
1456 diskinfo
[2] = capacity
>> 11;
1458 /* override with calculated, extended default, or driver values */
1459 if (host
->hostt
->bios_param
)
1460 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1462 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1464 geo
->heads
= diskinfo
[0];
1465 geo
->sectors
= diskinfo
[1];
1466 geo
->cylinders
= diskinfo
[2];
1471 * sd_ioctl - process an ioctl
1472 * @bdev: target block device
1473 * @mode: FMODE_* mask
1474 * @cmd: ioctl command number
1475 * @arg: this is third argument given to ioctl(2) system call.
1476 * Often contains a pointer.
1478 * Returns 0 if successful (some ioctls return positive numbers on
1479 * success as well). Returns a negated errno value in case of error.
1481 * Note: most ioctls are forward onto the block subsystem or further
1482 * down in the scsi subsystem.
1484 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1485 unsigned int cmd
, unsigned long arg
)
1487 struct gendisk
*disk
= bdev
->bd_disk
;
1488 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1489 struct scsi_device
*sdp
= sdkp
->device
;
1490 void __user
*p
= (void __user
*)arg
;
1493 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1494 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1496 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1501 * If we are in the middle of error recovery, don't let anyone
1502 * else try and use this device. Also, if error recovery fails, it
1503 * may try and take the device offline, in which case all further
1504 * access to the device is prohibited.
1506 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1507 (mode
& FMODE_NDELAY
) != 0);
1511 if (is_sed_ioctl(cmd
))
1512 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1515 * Send SCSI addressing ioctls directly to mid level, send other
1516 * ioctls to block level and then onto mid level if they can't be
1520 case SCSI_IOCTL_GET_IDLUN
:
1521 case SCSI_IOCTL_GET_BUS_NUMBER
:
1522 error
= scsi_ioctl(sdp
, cmd
, p
);
1525 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1526 if (error
!= -ENOTTY
)
1528 error
= scsi_ioctl(sdp
, cmd
, p
);
1535 static void set_media_not_present(struct scsi_disk
*sdkp
)
1537 if (sdkp
->media_present
)
1538 sdkp
->device
->changed
= 1;
1540 if (sdkp
->device
->removable
) {
1541 sdkp
->media_present
= 0;
1546 static int media_not_present(struct scsi_disk
*sdkp
,
1547 struct scsi_sense_hdr
*sshdr
)
1549 if (!scsi_sense_valid(sshdr
))
1552 /* not invoked for commands that could return deferred errors */
1553 switch (sshdr
->sense_key
) {
1554 case UNIT_ATTENTION
:
1556 /* medium not present */
1557 if (sshdr
->asc
== 0x3A) {
1558 set_media_not_present(sdkp
);
1566 * sd_check_events - check media events
1567 * @disk: kernel device descriptor
1568 * @clearing: disk events currently being cleared
1570 * Returns mask of DISK_EVENT_*.
1572 * Note: this function is invoked from the block subsystem.
1574 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1576 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1577 struct scsi_device
*sdp
;
1584 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1587 * If the device is offline, don't send any commands - just pretend as
1588 * if the command failed. If the device ever comes back online, we
1589 * can deal with it then. It is only because of unrecoverable errors
1590 * that we would ever take a device offline in the first place.
1592 if (!scsi_device_online(sdp
)) {
1593 set_media_not_present(sdkp
);
1598 * Using TEST_UNIT_READY enables differentiation between drive with
1599 * no cartridge loaded - NOT READY, drive with changed cartridge -
1600 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1602 * Drives that auto spin down. eg iomega jaz 1G, will be started
1603 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1604 * sd_revalidate() is called.
1606 if (scsi_block_when_processing_errors(sdp
)) {
1607 struct scsi_sense_hdr sshdr
= { 0, };
1609 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1612 /* failed to execute TUR, assume media not present */
1613 if (host_byte(retval
)) {
1614 set_media_not_present(sdkp
);
1618 if (media_not_present(sdkp
, &sshdr
))
1623 * For removable scsi disk we have to recognise the presence
1624 * of a disk in the drive.
1626 if (!sdkp
->media_present
)
1628 sdkp
->media_present
= 1;
1631 * sdp->changed is set under the following conditions:
1633 * Medium present state has changed in either direction.
1634 * Device has indicated UNIT_ATTENTION.
1636 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1638 scsi_disk_put(sdkp
);
1642 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1645 struct scsi_device
*sdp
= sdkp
->device
;
1646 const int timeout
= sdp
->request_queue
->rq_timeout
1647 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1648 struct scsi_sense_hdr my_sshdr
;
1650 if (!scsi_device_online(sdp
))
1653 /* caller might not be interested in sense, but we need it */
1657 for (retries
= 3; retries
> 0; --retries
) {
1658 unsigned char cmd
[10] = { 0 };
1660 cmd
[0] = SYNCHRONIZE_CACHE
;
1662 * Leave the rest of the command zero to indicate
1665 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1666 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1672 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1674 if (driver_byte(res
) & DRIVER_SENSE
)
1675 sd_print_sense_hdr(sdkp
, sshdr
);
1677 /* we need to evaluate the error return */
1678 if (scsi_sense_valid(sshdr
) &&
1679 (sshdr
->asc
== 0x3a || /* medium not present */
1680 sshdr
->asc
== 0x20)) /* invalid command */
1681 /* this is no error here */
1684 switch (host_byte(res
)) {
1685 /* ignore errors due to racing a disconnection */
1686 case DID_BAD_TARGET
:
1687 case DID_NO_CONNECT
:
1689 /* signal the upper layer it might try again */
1693 case DID_SOFT_ERROR
:
1702 static void sd_rescan(struct device
*dev
)
1704 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1706 revalidate_disk(sdkp
->disk
);
1710 #ifdef CONFIG_COMPAT
1712 * This gets directly called from VFS. When the ioctl
1713 * is not recognized we go back to the other translation paths.
1715 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1716 unsigned int cmd
, unsigned long arg
)
1718 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1721 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1722 (mode
& FMODE_NDELAY
) != 0);
1727 * Let the static ioctl translation table take care of it.
1729 if (!sdev
->host
->hostt
->compat_ioctl
)
1730 return -ENOIOCTLCMD
;
1731 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1735 static char sd_pr_type(enum pr_type type
)
1738 case PR_WRITE_EXCLUSIVE
:
1740 case PR_EXCLUSIVE_ACCESS
:
1742 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1744 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1746 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1748 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1755 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1756 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1758 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1759 struct scsi_sense_hdr sshdr
;
1761 u8 cmd
[16] = { 0, };
1762 u8 data
[24] = { 0, };
1764 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1767 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1769 put_unaligned_be64(key
, &data
[0]);
1770 put_unaligned_be64(sa_key
, &data
[8]);
1773 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1774 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1776 if ((driver_byte(result
) & DRIVER_SENSE
) &&
1777 (scsi_sense_valid(&sshdr
))) {
1778 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1779 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1785 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1788 if (flags
& ~PR_FL_IGNORE_KEY
)
1790 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1791 old_key
, new_key
, 0,
1792 (1 << 0) /* APTPL */);
1795 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1800 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1803 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1805 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1808 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1809 enum pr_type type
, bool abort
)
1811 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1812 sd_pr_type(type
), 0);
1815 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1817 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1820 static const struct pr_ops sd_pr_ops
= {
1821 .pr_register
= sd_pr_register
,
1822 .pr_reserve
= sd_pr_reserve
,
1823 .pr_release
= sd_pr_release
,
1824 .pr_preempt
= sd_pr_preempt
,
1825 .pr_clear
= sd_pr_clear
,
1828 static const struct block_device_operations sd_fops
= {
1829 .owner
= THIS_MODULE
,
1831 .release
= sd_release
,
1833 .getgeo
= sd_getgeo
,
1834 #ifdef CONFIG_COMPAT
1835 .compat_ioctl
= sd_compat_ioctl
,
1837 .check_events
= sd_check_events
,
1838 .revalidate_disk
= sd_revalidate_disk
,
1839 .unlock_native_capacity
= sd_unlock_native_capacity
,
1840 .pr_ops
= &sd_pr_ops
,
1844 * sd_eh_reset - reset error handling callback
1845 * @scmd: sd-issued command that has failed
1847 * This function is called by the SCSI midlayer before starting
1848 * SCSI EH. When counting medium access failures we have to be
1849 * careful to register it only only once per device and SCSI EH run;
1850 * there might be several timed out commands which will cause the
1851 * 'max_medium_access_timeouts' counter to trigger after the first
1852 * SCSI EH run already and set the device to offline.
1853 * So this function resets the internal counter before starting SCSI EH.
1855 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1857 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1859 /* New SCSI EH run, reset gate variable */
1860 sdkp
->ignore_medium_access_errors
= false;
1864 * sd_eh_action - error handling callback
1865 * @scmd: sd-issued command that has failed
1866 * @eh_disp: The recovery disposition suggested by the midlayer
1868 * This function is called by the SCSI midlayer upon completion of an
1869 * error test command (currently TEST UNIT READY). The result of sending
1870 * the eh command is passed in eh_disp. We're looking for devices that
1871 * fail medium access commands but are OK with non access commands like
1872 * test unit ready (so wrongly see the device as having a successful
1875 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1877 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1878 struct scsi_device
*sdev
= scmd
->device
;
1880 if (!scsi_device_online(sdev
) ||
1881 !scsi_medium_access_command(scmd
) ||
1882 host_byte(scmd
->result
) != DID_TIME_OUT
||
1887 * The device has timed out executing a medium access command.
1888 * However, the TEST UNIT READY command sent during error
1889 * handling completed successfully. Either the device is in the
1890 * process of recovering or has it suffered an internal failure
1891 * that prevents access to the storage medium.
1893 if (!sdkp
->ignore_medium_access_errors
) {
1894 sdkp
->medium_access_timed_out
++;
1895 sdkp
->ignore_medium_access_errors
= true;
1899 * If the device keeps failing read/write commands but TEST UNIT
1900 * READY always completes successfully we assume that medium
1901 * access is no longer possible and take the device offline.
1903 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1904 scmd_printk(KERN_ERR
, scmd
,
1905 "Medium access timeout failure. Offlining disk!\n");
1906 mutex_lock(&sdev
->state_mutex
);
1907 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1908 mutex_unlock(&sdev
->state_mutex
);
1916 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1918 struct request
*req
= scmd
->request
;
1919 struct scsi_device
*sdev
= scmd
->device
;
1920 unsigned int transferred
, good_bytes
;
1921 u64 start_lba
, end_lba
, bad_lba
;
1924 * Some commands have a payload smaller than the device logical
1925 * block size (e.g. INQUIRY on a 4K disk).
1927 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1930 /* Check if we have a 'bad_lba' information */
1931 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1932 SCSI_SENSE_BUFFERSIZE
,
1937 * If the bad lba was reported incorrectly, we have no idea where
1940 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1941 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1942 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1946 * resid is optional but mostly filled in. When it's unused,
1947 * its value is zero, so we assume the whole buffer transferred
1949 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1951 /* This computation should always be done in terms of the
1952 * resolution of the device's medium.
1954 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1956 return min(good_bytes
, transferred
);
1960 * sd_done - bottom half handler: called when the lower level
1961 * driver has completed (successfully or otherwise) a scsi command.
1962 * @SCpnt: mid-level's per command structure.
1964 * Note: potentially run from within an ISR. Must not block.
1966 static int sd_done(struct scsi_cmnd
*SCpnt
)
1968 int result
= SCpnt
->result
;
1969 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1970 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1972 struct scsi_sense_hdr sshdr
;
1973 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1974 struct request
*req
= SCpnt
->request
;
1975 int sense_valid
= 0;
1976 int sense_deferred
= 0;
1978 switch (req_op(req
)) {
1979 case REQ_OP_DISCARD
:
1980 case REQ_OP_WRITE_ZEROES
:
1981 case REQ_OP_WRITE_SAME
:
1982 case REQ_OP_ZONE_RESET
:
1984 good_bytes
= blk_rq_bytes(req
);
1985 scsi_set_resid(SCpnt
, 0);
1988 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1991 case REQ_OP_ZONE_REPORT
:
1993 good_bytes
= scsi_bufflen(SCpnt
)
1994 - scsi_get_resid(SCpnt
);
1995 scsi_set_resid(SCpnt
, 0);
1998 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
2003 * In case of bogus fw or device, we could end up having
2004 * an unaligned partial completion. Check this here and force
2007 resid
= scsi_get_resid(SCpnt
);
2008 if (resid
& (sector_size
- 1)) {
2009 sd_printk(KERN_INFO
, sdkp
,
2010 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2011 resid
, sector_size
);
2012 resid
= min(scsi_bufflen(SCpnt
),
2013 round_up(resid
, sector_size
));
2014 scsi_set_resid(SCpnt
, resid
);
2019 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
2021 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
2023 sdkp
->medium_access_timed_out
= 0;
2025 if (driver_byte(result
) != DRIVER_SENSE
&&
2026 (!sense_valid
|| sense_deferred
))
2029 switch (sshdr
.sense_key
) {
2030 case HARDWARE_ERROR
:
2032 good_bytes
= sd_completed_bytes(SCpnt
);
2034 case RECOVERED_ERROR
:
2035 good_bytes
= scsi_bufflen(SCpnt
);
2038 /* This indicates a false check condition, so ignore it. An
2039 * unknown amount of data was transferred so treat it as an
2043 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2045 case ABORTED_COMMAND
:
2046 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2047 good_bytes
= sd_completed_bytes(SCpnt
);
2049 case ILLEGAL_REQUEST
:
2050 switch (sshdr
.asc
) {
2051 case 0x10: /* DIX: Host detected corruption */
2052 good_bytes
= sd_completed_bytes(SCpnt
);
2054 case 0x20: /* INVALID COMMAND OPCODE */
2055 case 0x24: /* INVALID FIELD IN CDB */
2056 switch (SCpnt
->cmnd
[0]) {
2058 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2062 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2063 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2065 sdkp
->device
->no_write_same
= 1;
2066 sd_config_write_same(sdkp
);
2067 req
->__data_len
= blk_rq_bytes(req
);
2068 req
->rq_flags
|= RQF_QUIET
;
2079 if (sd_is_zoned(sdkp
))
2080 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2082 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2083 "sd_done: completed %d of %d bytes\n",
2084 good_bytes
, scsi_bufflen(SCpnt
)));
2086 if (rq_data_dir(SCpnt
->request
) == READ
&& scsi_prot_sg_count(SCpnt
))
2087 sd_dif_complete(SCpnt
, good_bytes
);
2093 * spinup disk - called only in sd_revalidate_disk()
2096 sd_spinup_disk(struct scsi_disk
*sdkp
)
2098 unsigned char cmd
[10];
2099 unsigned long spintime_expire
= 0;
2100 int retries
, spintime
;
2101 unsigned int the_result
;
2102 struct scsi_sense_hdr sshdr
;
2103 int sense_valid
= 0;
2107 /* Spin up drives, as required. Only do this at boot time */
2108 /* Spinup needs to be done for module loads too. */
2113 cmd
[0] = TEST_UNIT_READY
;
2114 memset((void *) &cmd
[1], 0, 9);
2116 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2119 SD_MAX_RETRIES
, NULL
);
2122 * If the drive has indicated to us that it
2123 * doesn't have any media in it, don't bother
2124 * with any more polling.
2126 if (media_not_present(sdkp
, &sshdr
))
2130 sense_valid
= scsi_sense_valid(&sshdr
);
2132 } while (retries
< 3 &&
2133 (!scsi_status_is_good(the_result
) ||
2134 ((driver_byte(the_result
) & DRIVER_SENSE
) &&
2135 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2137 if ((driver_byte(the_result
) & DRIVER_SENSE
) == 0) {
2138 /* no sense, TUR either succeeded or failed
2139 * with a status error */
2140 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2141 sd_print_result(sdkp
, "Test Unit Ready failed",
2148 * The device does not want the automatic start to be issued.
2150 if (sdkp
->device
->no_start_on_add
)
2153 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2154 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2155 break; /* manual intervention required */
2156 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2157 break; /* standby */
2158 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2159 break; /* unavailable */
2160 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2161 break; /* sanitize in progress */
2163 * Issue command to spin up drive when not ready
2166 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2167 cmd
[0] = START_STOP
;
2168 cmd
[1] = 1; /* Return immediately */
2169 memset((void *) &cmd
[2], 0, 8);
2170 cmd
[4] = 1; /* Start spin cycle */
2171 if (sdkp
->device
->start_stop_pwr_cond
)
2173 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2175 SD_TIMEOUT
, SD_MAX_RETRIES
,
2177 spintime_expire
= jiffies
+ 100 * HZ
;
2180 /* Wait 1 second for next try */
2185 * Wait for USB flash devices with slow firmware.
2186 * Yes, this sense key/ASC combination shouldn't
2187 * occur here. It's characteristic of these devices.
2189 } else if (sense_valid
&&
2190 sshdr
.sense_key
== UNIT_ATTENTION
&&
2191 sshdr
.asc
== 0x28) {
2193 spintime_expire
= jiffies
+ 5 * HZ
;
2196 /* Wait 1 second for next try */
2199 /* we don't understand the sense code, so it's
2200 * probably pointless to loop */
2202 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2203 sd_print_sense_hdr(sdkp
, &sshdr
);
2208 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2211 if (scsi_status_is_good(the_result
))
2214 printk("not responding...\n");
2219 * Determine whether disk supports Data Integrity Field.
2221 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2223 struct scsi_device
*sdp
= sdkp
->device
;
2227 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2230 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2232 if (type
> T10_PI_TYPE3_PROTECTION
)
2234 else if (scsi_host_dif_capable(sdp
->host
, type
))
2237 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2240 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2241 " protection type %u. Disabling disk!\n",
2245 sd_printk(KERN_NOTICE
, sdkp
,
2246 "Enabling DIF Type %u protection\n", type
);
2249 sd_printk(KERN_NOTICE
, sdkp
,
2250 "Disabling DIF Type %u protection\n", type
);
2254 sdkp
->protection_type
= type
;
2259 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2260 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2263 if (driver_byte(the_result
) & DRIVER_SENSE
)
2264 sd_print_sense_hdr(sdkp
, sshdr
);
2266 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2269 * Set dirty bit for removable devices if not ready -
2270 * sometimes drives will not report this properly.
2272 if (sdp
->removable
&&
2273 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2274 set_media_not_present(sdkp
);
2277 * We used to set media_present to 0 here to indicate no media
2278 * in the drive, but some drives fail read capacity even with
2279 * media present, so we can't do that.
2281 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2285 #if RC16_LEN > SD_BUF_SIZE
2286 #error RC16_LEN must not be more than SD_BUF_SIZE
2289 #define READ_CAPACITY_RETRIES_ON_RESET 10
2292 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2293 * and the reported logical block size is bigger than 512 bytes. Note
2294 * that last_sector is a u64 and therefore logical_to_sectors() is not
2297 static bool sd_addressable_capacity(u64 lba
, unsigned int sector_size
)
2299 u64 last_sector
= (lba
+ 1ULL) << (ilog2(sector_size
) - 9);
2301 if (sizeof(sector_t
) == 4 && last_sector
> U32_MAX
)
2307 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2308 unsigned char *buffer
)
2310 unsigned char cmd
[16];
2311 struct scsi_sense_hdr sshdr
;
2312 int sense_valid
= 0;
2314 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2315 unsigned int alignment
;
2316 unsigned long long lba
;
2317 unsigned sector_size
;
2319 if (sdp
->no_read_capacity_16
)
2324 cmd
[0] = SERVICE_ACTION_IN_16
;
2325 cmd
[1] = SAI_READ_CAPACITY_16
;
2327 memset(buffer
, 0, RC16_LEN
);
2329 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2330 buffer
, RC16_LEN
, &sshdr
,
2331 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2333 if (media_not_present(sdkp
, &sshdr
))
2337 sense_valid
= scsi_sense_valid(&sshdr
);
2339 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2340 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2342 /* Invalid Command Operation Code or
2343 * Invalid Field in CDB, just retry
2344 * silently with RC10 */
2347 sshdr
.sense_key
== UNIT_ATTENTION
&&
2348 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2349 /* Device reset might occur several times,
2350 * give it one more chance */
2351 if (--reset_retries
> 0)
2356 } while (the_result
&& retries
);
2359 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2360 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2364 sector_size
= get_unaligned_be32(&buffer
[8]);
2365 lba
= get_unaligned_be64(&buffer
[0]);
2367 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2372 if (!sd_addressable_capacity(lba
, sector_size
)) {
2373 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2374 "kernel compiled with support for large block "
2380 /* Logical blocks per physical block exponent */
2381 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2384 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2386 /* Lowest aligned logical block */
2387 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2388 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2389 if (alignment
&& sdkp
->first_scan
)
2390 sd_printk(KERN_NOTICE
, sdkp
,
2391 "physical block alignment offset: %u\n", alignment
);
2393 if (buffer
[14] & 0x80) { /* LBPME */
2396 if (buffer
[14] & 0x40) /* LBPRZ */
2399 sd_config_discard(sdkp
, SD_LBP_WS16
);
2402 sdkp
->capacity
= lba
+ 1;
2406 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2407 unsigned char *buffer
)
2409 unsigned char cmd
[16];
2410 struct scsi_sense_hdr sshdr
;
2411 int sense_valid
= 0;
2413 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2415 unsigned sector_size
;
2418 cmd
[0] = READ_CAPACITY
;
2419 memset(&cmd
[1], 0, 9);
2420 memset(buffer
, 0, 8);
2422 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2424 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2426 if (media_not_present(sdkp
, &sshdr
))
2430 sense_valid
= scsi_sense_valid(&sshdr
);
2432 sshdr
.sense_key
== UNIT_ATTENTION
&&
2433 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2434 /* Device reset might occur several times,
2435 * give it one more chance */
2436 if (--reset_retries
> 0)
2441 } while (the_result
&& retries
);
2444 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2445 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2449 sector_size
= get_unaligned_be32(&buffer
[4]);
2450 lba
= get_unaligned_be32(&buffer
[0]);
2452 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2453 /* Some buggy (usb cardreader) devices return an lba of
2454 0xffffffff when the want to report a size of 0 (with
2455 which they really mean no media is present) */
2457 sdkp
->physical_block_size
= sector_size
;
2461 if (!sd_addressable_capacity(lba
, sector_size
)) {
2462 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2463 "kernel compiled with support for large block "
2469 sdkp
->capacity
= lba
+ 1;
2470 sdkp
->physical_block_size
= sector_size
;
2474 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2476 if (sdp
->host
->max_cmd_len
< 16)
2478 if (sdp
->try_rc_10_first
)
2480 if (sdp
->scsi_level
> SCSI_SPC_2
)
2482 if (scsi_device_protection(sdp
))
2488 * read disk capacity
2491 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2494 struct scsi_device
*sdp
= sdkp
->device
;
2496 if (sd_try_rc16_first(sdp
)) {
2497 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2498 if (sector_size
== -EOVERFLOW
)
2500 if (sector_size
== -ENODEV
)
2502 if (sector_size
< 0)
2503 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2504 if (sector_size
< 0)
2507 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2508 if (sector_size
== -EOVERFLOW
)
2510 if (sector_size
< 0)
2512 if ((sizeof(sdkp
->capacity
) > 4) &&
2513 (sdkp
->capacity
> 0xffffffffULL
)) {
2514 int old_sector_size
= sector_size
;
2515 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2516 "Trying to use READ CAPACITY(16).\n");
2517 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2518 if (sector_size
< 0) {
2519 sd_printk(KERN_NOTICE
, sdkp
,
2520 "Using 0xffffffff as device size\n");
2521 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2522 sector_size
= old_sector_size
;
2525 /* Remember that READ CAPACITY(16) succeeded */
2526 sdp
->try_rc_10_first
= 0;
2530 /* Some devices are known to return the total number of blocks,
2531 * not the highest block number. Some devices have versions
2532 * which do this and others which do not. Some devices we might
2533 * suspect of doing this but we don't know for certain.
2535 * If we know the reported capacity is wrong, decrement it. If
2536 * we can only guess, then assume the number of blocks is even
2537 * (usually true but not always) and err on the side of lowering
2540 if (sdp
->fix_capacity
||
2541 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2542 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2543 "from its reported value: %llu\n",
2544 (unsigned long long) sdkp
->capacity
);
2549 if (sector_size
== 0) {
2551 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2555 if (sector_size
!= 512 &&
2556 sector_size
!= 1024 &&
2557 sector_size
!= 2048 &&
2558 sector_size
!= 4096) {
2559 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2562 * The user might want to re-format the drive with
2563 * a supported sectorsize. Once this happens, it
2564 * would be relatively trivial to set the thing up.
2565 * For this reason, we leave the thing in the table.
2569 * set a bogus sector size so the normal read/write
2570 * logic in the block layer will eventually refuse any
2571 * request on this device without tripping over power
2572 * of two sector size assumptions
2576 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2577 blk_queue_physical_block_size(sdp
->request_queue
,
2578 sdkp
->physical_block_size
);
2579 sdkp
->device
->sector_size
= sector_size
;
2581 if (sdkp
->capacity
> 0xffffffff)
2582 sdp
->use_16_for_rw
= 1;
2587 * Print disk capacity
2590 sd_print_capacity(struct scsi_disk
*sdkp
,
2591 sector_t old_capacity
)
2593 int sector_size
= sdkp
->device
->sector_size
;
2594 char cap_str_2
[10], cap_str_10
[10];
2596 string_get_size(sdkp
->capacity
, sector_size
,
2597 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2598 string_get_size(sdkp
->capacity
, sector_size
,
2599 STRING_UNITS_10
, cap_str_10
,
2600 sizeof(cap_str_10
));
2602 if (sdkp
->first_scan
|| old_capacity
!= sdkp
->capacity
) {
2603 sd_printk(KERN_NOTICE
, sdkp
,
2604 "%llu %d-byte logical blocks: (%s/%s)\n",
2605 (unsigned long long)sdkp
->capacity
,
2606 sector_size
, cap_str_10
, cap_str_2
);
2608 if (sdkp
->physical_block_size
!= sector_size
)
2609 sd_printk(KERN_NOTICE
, sdkp
,
2610 "%u-byte physical blocks\n",
2611 sdkp
->physical_block_size
);
2613 sd_zbc_print_zones(sdkp
);
2617 /* called with buffer of length 512 */
2619 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2620 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2621 struct scsi_sense_hdr
*sshdr
)
2623 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2624 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2629 * read write protect setting, if possible - called only in sd_revalidate_disk()
2630 * called with buffer of length SD_BUF_SIZE
2633 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2636 struct scsi_device
*sdp
= sdkp
->device
;
2637 struct scsi_mode_data data
;
2638 int disk_ro
= get_disk_ro(sdkp
->disk
);
2639 int old_wp
= sdkp
->write_prot
;
2641 set_disk_ro(sdkp
->disk
, 0);
2642 if (sdp
->skip_ms_page_3f
) {
2643 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2647 if (sdp
->use_192_bytes_for_3f
) {
2648 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2651 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2652 * We have to start carefully: some devices hang if we ask
2653 * for more than is available.
2655 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2658 * Second attempt: ask for page 0 When only page 0 is
2659 * implemented, a request for page 3F may return Sense Key
2660 * 5: Illegal Request, Sense Code 24: Invalid field in
2663 if (!scsi_status_is_good(res
))
2664 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2667 * Third attempt: ask 255 bytes, as we did earlier.
2669 if (!scsi_status_is_good(res
))
2670 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2674 if (!scsi_status_is_good(res
)) {
2675 sd_first_printk(KERN_WARNING
, sdkp
,
2676 "Test WP failed, assume Write Enabled\n");
2678 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2679 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
|| disk_ro
);
2680 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2681 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2682 sdkp
->write_prot
? "on" : "off");
2683 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2689 * sd_read_cache_type - called only from sd_revalidate_disk()
2690 * called with buffer of length SD_BUF_SIZE
2693 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2696 struct scsi_device
*sdp
= sdkp
->device
;
2701 struct scsi_mode_data data
;
2702 struct scsi_sense_hdr sshdr
;
2703 int old_wce
= sdkp
->WCE
;
2704 int old_rcd
= sdkp
->RCD
;
2705 int old_dpofua
= sdkp
->DPOFUA
;
2708 if (sdkp
->cache_override
)
2712 if (sdp
->skip_ms_page_8
) {
2713 if (sdp
->type
== TYPE_RBC
)
2716 if (sdp
->skip_ms_page_3f
)
2719 if (sdp
->use_192_bytes_for_3f
)
2723 } else if (sdp
->type
== TYPE_RBC
) {
2731 /* cautiously ask */
2732 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2735 if (!scsi_status_is_good(res
))
2738 if (!data
.header_length
) {
2741 sd_first_printk(KERN_ERR
, sdkp
,
2742 "Missing header in MODE_SENSE response\n");
2745 /* that went OK, now ask for the proper length */
2749 * We're only interested in the first three bytes, actually.
2750 * But the data cache page is defined for the first 20.
2754 else if (len
> SD_BUF_SIZE
) {
2755 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2756 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2759 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2763 if (len
> first_len
)
2764 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2767 if (scsi_status_is_good(res
)) {
2768 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2770 while (offset
< len
) {
2771 u8 page_code
= buffer
[offset
] & 0x3F;
2772 u8 spf
= buffer
[offset
] & 0x40;
2774 if (page_code
== 8 || page_code
== 6) {
2775 /* We're interested only in the first 3 bytes.
2777 if (len
- offset
<= 2) {
2778 sd_first_printk(KERN_ERR
, sdkp
,
2779 "Incomplete mode parameter "
2783 modepage
= page_code
;
2787 /* Go to the next page */
2788 if (spf
&& len
- offset
> 3)
2789 offset
+= 4 + (buffer
[offset
+2] << 8) +
2791 else if (!spf
&& len
- offset
> 1)
2792 offset
+= 2 + buffer
[offset
+1];
2794 sd_first_printk(KERN_ERR
, sdkp
,
2796 "parameter data\n");
2802 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2806 if (modepage
== 8) {
2807 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2808 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2810 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2814 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2815 if (sdp
->broken_fua
) {
2816 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2818 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2819 !sdkp
->device
->use_16_for_rw
) {
2820 sd_first_printk(KERN_NOTICE
, sdkp
,
2821 "Uses READ/WRITE(6), disabling FUA\n");
2825 /* No cache flush allowed for write protected devices */
2826 if (sdkp
->WCE
&& sdkp
->write_prot
)
2829 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2830 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2831 sd_printk(KERN_NOTICE
, sdkp
,
2832 "Write cache: %s, read cache: %s, %s\n",
2833 sdkp
->WCE
? "enabled" : "disabled",
2834 sdkp
->RCD
? "disabled" : "enabled",
2835 sdkp
->DPOFUA
? "supports DPO and FUA"
2836 : "doesn't support DPO or FUA");
2842 if (scsi_sense_valid(&sshdr
) &&
2843 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2844 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2845 /* Invalid field in CDB */
2846 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2848 sd_first_printk(KERN_ERR
, sdkp
,
2849 "Asking for cache data failed\n");
2852 if (sdp
->wce_default_on
) {
2853 sd_first_printk(KERN_NOTICE
, sdkp
,
2854 "Assuming drive cache: write back\n");
2857 sd_first_printk(KERN_ERR
, sdkp
,
2858 "Assuming drive cache: write through\n");
2866 * The ATO bit indicates whether the DIF application tag is available
2867 * for use by the operating system.
2869 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2872 struct scsi_device
*sdp
= sdkp
->device
;
2873 struct scsi_mode_data data
;
2874 struct scsi_sense_hdr sshdr
;
2876 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2879 if (sdkp
->protection_type
== 0)
2882 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2883 SD_MAX_RETRIES
, &data
, &sshdr
);
2885 if (!scsi_status_is_good(res
) || !data
.header_length
||
2887 sd_first_printk(KERN_WARNING
, sdkp
,
2888 "getting Control mode page failed, assume no ATO\n");
2890 if (scsi_sense_valid(&sshdr
))
2891 sd_print_sense_hdr(sdkp
, &sshdr
);
2896 offset
= data
.header_length
+ data
.block_descriptor_length
;
2898 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2899 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2903 if ((buffer
[offset
+ 5] & 0x80) == 0)
2912 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2913 * @sdkp: disk to query
2915 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2917 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2918 const int vpd_len
= 64;
2919 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2922 /* Block Limits VPD */
2923 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2926 blk_queue_io_min(sdkp
->disk
->queue
,
2927 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2929 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2930 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2932 if (buffer
[3] == 0x3c) {
2933 unsigned int lba_count
, desc_count
;
2935 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2940 lba_count
= get_unaligned_be32(&buffer
[20]);
2941 desc_count
= get_unaligned_be32(&buffer
[24]);
2943 if (lba_count
&& desc_count
)
2944 sdkp
->max_unmap_blocks
= lba_count
;
2946 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2948 if (buffer
[32] & 0x80)
2949 sdkp
->unmap_alignment
=
2950 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2952 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2954 if (sdkp
->max_unmap_blocks
)
2955 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2957 sd_config_discard(sdkp
, SD_LBP_WS16
);
2959 } else { /* LBP VPD page tells us what to use */
2960 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2961 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2962 else if (sdkp
->lbpws
)
2963 sd_config_discard(sdkp
, SD_LBP_WS16
);
2964 else if (sdkp
->lbpws10
)
2965 sd_config_discard(sdkp
, SD_LBP_WS10
);
2967 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2976 * sd_read_block_characteristics - Query block dev. characteristics
2977 * @sdkp: disk to query
2979 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2981 struct request_queue
*q
= sdkp
->disk
->queue
;
2982 unsigned char *buffer
;
2984 const int vpd_len
= 64;
2986 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2989 /* Block Device Characteristics VPD */
2990 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2993 rot
= get_unaligned_be16(&buffer
[4]);
2996 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
, q
);
2997 queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM
, q
);
3000 if (sdkp
->device
->type
== TYPE_ZBC
) {
3002 q
->limits
.zoned
= BLK_ZONED_HM
;
3004 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
3005 if (sdkp
->zoned
== 1)
3007 q
->limits
.zoned
= BLK_ZONED_HA
;
3010 * Treat drive-managed devices as
3011 * regular block devices.
3013 q
->limits
.zoned
= BLK_ZONED_NONE
;
3015 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
3016 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
3017 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
3024 * sd_read_block_provisioning - Query provisioning VPD page
3025 * @sdkp: disk to query
3027 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
3029 unsigned char *buffer
;
3030 const int vpd_len
= 8;
3032 if (sdkp
->lbpme
== 0)
3035 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
3037 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
3041 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
3042 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3043 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3049 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3051 struct scsi_device
*sdev
= sdkp
->device
;
3053 if (sdev
->host
->no_write_same
) {
3054 sdev
->no_write_same
= 1;
3059 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3060 /* too large values might cause issues with arcmsr */
3061 int vpd_buf_len
= 64;
3063 sdev
->no_report_opcodes
= 1;
3065 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3066 * CODES is unsupported and the device has an ATA
3067 * Information VPD page (SAT).
3069 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3070 sdev
->no_write_same
= 1;
3073 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3076 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3080 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3082 struct scsi_device
*sdev
= sdkp
->device
;
3084 if (!sdev
->security_supported
)
3087 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3088 SECURITY_PROTOCOL_IN
) == 1 &&
3089 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3090 SECURITY_PROTOCOL_OUT
) == 1)
3095 * sd_revalidate_disk - called the first time a new disk is seen,
3096 * performs disk spin up, read_capacity, etc.
3097 * @disk: struct gendisk we care about
3099 static int sd_revalidate_disk(struct gendisk
*disk
)
3101 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3102 struct scsi_device
*sdp
= sdkp
->device
;
3103 struct request_queue
*q
= sdkp
->disk
->queue
;
3104 sector_t old_capacity
= sdkp
->capacity
;
3105 unsigned char *buffer
;
3106 unsigned int dev_max
, rw_max
;
3108 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3109 "sd_revalidate_disk\n"));
3112 * If the device is offline, don't try and read capacity or any
3113 * of the other niceties.
3115 if (!scsi_device_online(sdp
))
3118 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3120 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3121 "allocation failure.\n");
3125 sd_spinup_disk(sdkp
);
3128 * Without media there is no reason to ask; moreover, some devices
3129 * react badly if we do.
3131 if (sdkp
->media_present
) {
3132 sd_read_capacity(sdkp
, buffer
);
3134 if (scsi_device_supports_vpd(sdp
)) {
3135 sd_read_block_provisioning(sdkp
);
3136 sd_read_block_limits(sdkp
);
3137 sd_read_block_characteristics(sdkp
);
3138 sd_zbc_read_zones(sdkp
, buffer
);
3141 sd_print_capacity(sdkp
, old_capacity
);
3143 sd_read_write_protect_flag(sdkp
, buffer
);
3144 sd_read_cache_type(sdkp
, buffer
);
3145 sd_read_app_tag_own(sdkp
, buffer
);
3146 sd_read_write_same(sdkp
, buffer
);
3147 sd_read_security(sdkp
, buffer
);
3151 * We now have all cache related info, determine how we deal
3152 * with flush requests.
3154 sd_set_flush_flag(sdkp
);
3156 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3157 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3159 /* Some devices report a maximum block count for READ/WRITE requests. */
3160 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3161 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3164 * Determine the device's preferred I/O size for reads and writes
3165 * unless the reported value is unreasonably small, large, or
3168 if (sdkp
->opt_xfer_blocks
&&
3169 sdkp
->opt_xfer_blocks
<= dev_max
&&
3170 sdkp
->opt_xfer_blocks
<= SD_DEF_XFER_BLOCKS
&&
3171 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
) >= PAGE_SIZE
) {
3172 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3173 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3175 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3176 (sector_t
)BLK_DEF_MAX_SECTORS
);
3178 /* Do not exceed controller limit */
3179 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3182 * Only update max_sectors if previously unset or if the current value
3183 * exceeds the capabilities of the hardware.
3185 if (sdkp
->first_scan
||
3186 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3187 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3188 q
->limits
.max_sectors
= rw_max
;
3190 sdkp
->first_scan
= 0;
3192 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3193 sd_config_write_same(sdkp
);
3201 * sd_unlock_native_capacity - unlock native capacity
3202 * @disk: struct gendisk to set capacity for
3204 * Block layer calls this function if it detects that partitions
3205 * on @disk reach beyond the end of the device. If the SCSI host
3206 * implements ->unlock_native_capacity() method, it's invoked to
3207 * give it a chance to adjust the device capacity.
3210 * Defined by block layer. Might sleep.
3212 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3214 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3216 if (sdev
->host
->hostt
->unlock_native_capacity
)
3217 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3221 * sd_format_disk_name - format disk name
3222 * @prefix: name prefix - ie. "sd" for SCSI disks
3223 * @index: index of the disk to format name for
3224 * @buf: output buffer
3225 * @buflen: length of the output buffer
3227 * SCSI disk names starts at sda. The 26th device is sdz and the
3228 * 27th is sdaa. The last one for two lettered suffix is sdzz
3229 * which is followed by sdaaa.
3231 * This is basically 26 base counting with one extra 'nil' entry
3232 * at the beginning from the second digit on and can be
3233 * determined using similar method as 26 base conversion with the
3234 * index shifted -1 after each digit is computed.
3240 * 0 on success, -errno on failure.
3242 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3244 const int base
= 'z' - 'a' + 1;
3245 char *begin
= buf
+ strlen(prefix
);
3246 char *end
= buf
+ buflen
;
3256 *--p
= 'a' + (index
% unit
);
3257 index
= (index
/ unit
) - 1;
3258 } while (index
>= 0);
3260 memmove(begin
, p
, end
- p
);
3261 memcpy(buf
, prefix
, strlen(prefix
));
3267 * The asynchronous part of sd_probe
3269 static void sd_probe_async(void *data
, async_cookie_t cookie
)
3271 struct scsi_disk
*sdkp
= data
;
3272 struct scsi_device
*sdp
;
3279 index
= sdkp
->index
;
3280 dev
= &sdp
->sdev_gendev
;
3282 gd
->major
= sd_major((index
& 0xf0) >> 4);
3283 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3285 gd
->fops
= &sd_fops
;
3286 gd
->private_data
= &sdkp
->driver
;
3287 gd
->queue
= sdkp
->device
->request_queue
;
3289 /* defaults, until the device tells us otherwise */
3290 sdp
->sector_size
= 512;
3292 sdkp
->media_present
= 1;
3293 sdkp
->write_prot
= 0;
3294 sdkp
->cache_override
= 0;
3298 sdkp
->first_scan
= 1;
3299 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3301 sd_revalidate_disk(gd
);
3303 gd
->flags
= GENHD_FL_EXT_DEVT
;
3304 if (sdp
->removable
) {
3305 gd
->flags
|= GENHD_FL_REMOVABLE
;
3306 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3309 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3310 device_add_disk(dev
, gd
);
3312 sd_dif_config_host(sdkp
);
3314 sd_revalidate_disk(gd
);
3316 if (sdkp
->security
) {
3317 sdkp
->opal_dev
= init_opal_dev(sdp
, &sd_sec_submit
);
3319 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3322 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3323 sdp
->removable
? "removable " : "");
3324 scsi_autopm_put_device(sdp
);
3325 put_device(&sdkp
->dev
);
3329 * sd_probe - called during driver initialization and whenever a
3330 * new scsi device is attached to the system. It is called once
3331 * for each scsi device (not just disks) present.
3332 * @dev: pointer to device object
3334 * Returns 0 if successful (or not interested in this scsi device
3335 * (e.g. scanner)); 1 when there is an error.
3337 * Note: this function is invoked from the scsi mid-level.
3338 * This function sets up the mapping between a given
3339 * <host,channel,id,lun> (found in sdp) and new device name
3340 * (e.g. /dev/sda). More precisely it is the block device major
3341 * and minor number that is chosen here.
3343 * Assume sd_probe is not re-entrant (for time being)
3344 * Also think about sd_probe() and sd_remove() running coincidentally.
3346 static int sd_probe(struct device
*dev
)
3348 struct scsi_device
*sdp
= to_scsi_device(dev
);
3349 struct scsi_disk
*sdkp
;
3354 scsi_autopm_get_device(sdp
);
3356 if (sdp
->type
!= TYPE_DISK
&&
3357 sdp
->type
!= TYPE_ZBC
&&
3358 sdp
->type
!= TYPE_MOD
&&
3359 sdp
->type
!= TYPE_RBC
)
3362 #ifndef CONFIG_BLK_DEV_ZONED
3363 if (sdp
->type
== TYPE_ZBC
)
3366 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3370 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3374 gd
= alloc_disk(SD_MINORS
);
3379 if (!ida_pre_get(&sd_index_ida
, GFP_KERNEL
))
3382 spin_lock(&sd_index_lock
);
3383 error
= ida_get_new(&sd_index_ida
, &index
);
3384 spin_unlock(&sd_index_lock
);
3385 } while (error
== -EAGAIN
);
3388 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3392 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3394 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3395 goto out_free_index
;
3399 sdkp
->driver
= &sd_template
;
3401 sdkp
->index
= index
;
3402 atomic_set(&sdkp
->openers
, 0);
3403 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3405 if (!sdp
->request_queue
->rq_timeout
) {
3406 if (sdp
->type
!= TYPE_MOD
)
3407 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3409 blk_queue_rq_timeout(sdp
->request_queue
,
3413 device_initialize(&sdkp
->dev
);
3414 sdkp
->dev
.parent
= dev
;
3415 sdkp
->dev
.class = &sd_disk_class
;
3416 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3418 error
= device_add(&sdkp
->dev
);
3420 goto out_free_index
;
3423 dev_set_drvdata(dev
, sdkp
);
3425 get_device(&sdkp
->dev
); /* prevent release before async_schedule */
3426 async_schedule_domain(sd_probe_async
, sdkp
, &scsi_sd_probe_domain
);
3431 spin_lock(&sd_index_lock
);
3432 ida_remove(&sd_index_ida
, index
);
3433 spin_unlock(&sd_index_lock
);
3439 scsi_autopm_put_device(sdp
);
3444 * sd_remove - called whenever a scsi disk (previously recognized by
3445 * sd_probe) is detached from the system. It is called (potentially
3446 * multiple times) during sd module unload.
3447 * @dev: pointer to device object
3449 * Note: this function is invoked from the scsi mid-level.
3450 * This function potentially frees up a device name (e.g. /dev/sdc)
3451 * that could be re-used by a subsequent sd_probe().
3452 * This function is not called when the built-in sd driver is "exit-ed".
3454 static int sd_remove(struct device
*dev
)
3456 struct scsi_disk
*sdkp
;
3459 sdkp
= dev_get_drvdata(dev
);
3460 devt
= disk_devt(sdkp
->disk
);
3461 scsi_autopm_get_device(sdkp
->device
);
3463 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3464 async_synchronize_full_domain(&scsi_sd_probe_domain
);
3465 device_del(&sdkp
->dev
);
3466 del_gendisk(sdkp
->disk
);
3469 sd_zbc_remove(sdkp
);
3471 free_opal_dev(sdkp
->opal_dev
);
3473 blk_register_region(devt
, SD_MINORS
, NULL
,
3474 sd_default_probe
, NULL
, NULL
);
3476 mutex_lock(&sd_ref_mutex
);
3477 dev_set_drvdata(dev
, NULL
);
3478 put_device(&sdkp
->dev
);
3479 mutex_unlock(&sd_ref_mutex
);
3485 * scsi_disk_release - Called to free the scsi_disk structure
3486 * @dev: pointer to embedded class device
3488 * sd_ref_mutex must be held entering this routine. Because it is
3489 * called on last put, you should always use the scsi_disk_get()
3490 * scsi_disk_put() helpers which manipulate the semaphore directly
3491 * and never do a direct put_device.
3493 static void scsi_disk_release(struct device
*dev
)
3495 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3496 struct gendisk
*disk
= sdkp
->disk
;
3498 spin_lock(&sd_index_lock
);
3499 ida_remove(&sd_index_ida
, sdkp
->index
);
3500 spin_unlock(&sd_index_lock
);
3502 disk
->private_data
= NULL
;
3504 put_device(&sdkp
->device
->sdev_gendev
);
3509 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3511 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3512 struct scsi_sense_hdr sshdr
;
3513 struct scsi_device
*sdp
= sdkp
->device
;
3517 cmd
[4] |= 1; /* START */
3519 if (sdp
->start_stop_pwr_cond
)
3520 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3522 if (!scsi_device_online(sdp
))
3525 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3526 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3528 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3529 if (driver_byte(res
) & DRIVER_SENSE
)
3530 sd_print_sense_hdr(sdkp
, &sshdr
);
3531 if (scsi_sense_valid(&sshdr
) &&
3532 /* 0x3a is medium not present */
3537 /* SCSI error codes must not go to the generic layer */
3545 * Send a SYNCHRONIZE CACHE instruction down to the device through
3546 * the normal SCSI command structure. Wait for the command to
3549 static void sd_shutdown(struct device
*dev
)
3551 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3554 return; /* this can happen */
3556 if (pm_runtime_suspended(dev
))
3559 if (sdkp
->WCE
&& sdkp
->media_present
) {
3560 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3561 sd_sync_cache(sdkp
, NULL
);
3564 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3565 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3566 sd_start_stop_device(sdkp
, 0);
3570 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3572 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3573 struct scsi_sense_hdr sshdr
;
3576 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3579 if (sdkp
->WCE
&& sdkp
->media_present
) {
3580 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3581 ret
= sd_sync_cache(sdkp
, &sshdr
);
3584 /* ignore OFFLINE device */
3588 if (!scsi_sense_valid(&sshdr
) ||
3589 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3593 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3594 * doesn't support sync. There's not much to do and
3595 * suspend shouldn't fail.
3601 if (sdkp
->device
->manage_start_stop
) {
3602 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3603 /* an error is not worth aborting a system sleep */
3604 ret
= sd_start_stop_device(sdkp
, 0);
3605 if (ignore_stop_errors
)
3612 static int sd_suspend_system(struct device
*dev
)
3614 return sd_suspend_common(dev
, true);
3617 static int sd_suspend_runtime(struct device
*dev
)
3619 return sd_suspend_common(dev
, false);
3622 static int sd_resume(struct device
*dev
)
3624 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3627 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3630 if (!sdkp
->device
->manage_start_stop
)
3633 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3634 ret
= sd_start_stop_device(sdkp
, 1);
3636 opal_unlock_from_suspend(sdkp
->opal_dev
);
3641 * init_sd - entry point for this driver (both when built in or when
3644 * Note: this function registers this driver with the scsi mid-level.
3646 static int __init
init_sd(void)
3648 int majors
= 0, i
, err
;
3650 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3652 for (i
= 0; i
< SD_MAJORS
; i
++) {
3653 if (register_blkdev(sd_major(i
), "sd") != 0)
3656 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3657 sd_default_probe
, NULL
, NULL
);
3663 err
= class_register(&sd_disk_class
);
3667 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3669 if (!sd_cdb_cache
) {
3670 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3675 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3677 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3682 sd_page_pool
= mempool_create_page_pool(SD_MEMPOOL_SIZE
, 0);
3683 if (!sd_page_pool
) {
3684 printk(KERN_ERR
"sd: can't init discard page pool\n");
3689 err
= scsi_register_driver(&sd_template
.gendrv
);
3691 goto err_out_driver
;
3696 mempool_destroy(sd_page_pool
);
3699 mempool_destroy(sd_cdb_pool
);
3702 kmem_cache_destroy(sd_cdb_cache
);
3705 class_unregister(&sd_disk_class
);
3707 for (i
= 0; i
< SD_MAJORS
; i
++)
3708 unregister_blkdev(sd_major(i
), "sd");
3713 * exit_sd - exit point for this driver (when it is a module).
3715 * Note: this function unregisters this driver from the scsi mid-level.
3717 static void __exit
exit_sd(void)
3721 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3723 scsi_unregister_driver(&sd_template
.gendrv
);
3724 mempool_destroy(sd_cdb_pool
);
3725 mempool_destroy(sd_page_pool
);
3726 kmem_cache_destroy(sd_cdb_cache
);
3728 class_unregister(&sd_disk_class
);
3730 for (i
= 0; i
< SD_MAJORS
; i
++) {
3731 blk_unregister_region(sd_major(i
), SD_MINORS
);
3732 unregister_blkdev(sd_major(i
), "sd");
3736 module_init(init_sd
);
3737 module_exit(exit_sd
);
3739 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3740 struct scsi_sense_hdr
*sshdr
)
3742 scsi_print_sense_hdr(sdkp
->device
,
3743 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3746 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3749 const char *hb_string
= scsi_hostbyte_string(result
);
3750 const char *db_string
= scsi_driverbyte_string(result
);
3752 if (hb_string
|| db_string
)
3753 sd_printk(KERN_INFO
, sdkp
,
3754 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3755 hb_string
? hb_string
: "invalid",
3756 db_string
? db_string
: "invalid");
3758 sd_printk(KERN_INFO
, sdkp
,
3759 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3760 msg
, host_byte(result
), driver_byte(result
));