2 * sd.c Copyright (C) 1992 Drew Eckhardt
3 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
5 * Linux scsi disk driver
6 * Initial versions: Drew Eckhardt
7 * Subsequent revisions: Eric Youngdale
8 * Modification history:
9 * - Drew Eckhardt <drew@colorado.edu> original
10 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
11 * outstanding request, and other enhancements.
12 * Support loadable low-level scsi drivers.
13 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
14 * eight major numbers.
15 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
16 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
17 * sd_init and cleanups.
18 * - Alex Davis <letmein@erols.com> Fix problem where partition info
19 * not being read in sd_open. Fix problem where removable media
20 * could be ejected after sd_open.
21 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
22 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
23 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
24 * Support 32k/1M disks.
26 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
27 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
28 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
29 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
30 * - entering other commands: SCSI_LOG_HLQUEUE level 3
31 * Note: when the logging level is set by the user, it must be greater
32 * than the level indicated above to trigger output.
35 #include <linux/module.h>
37 #include <linux/kernel.h>
39 #include <linux/bio.h>
40 #include <linux/genhd.h>
41 #include <linux/hdreg.h>
42 #include <linux/errno.h>
43 #include <linux/idr.h>
44 #include <linux/interrupt.h>
45 #include <linux/init.h>
46 #include <linux/blkdev.h>
47 #include <linux/blkpg.h>
48 #include <linux/delay.h>
49 #include <linux/mutex.h>
50 #include <linux/string_helpers.h>
51 #include <linux/async.h>
52 #include <linux/slab.h>
53 #include <linux/sed-opal.h>
54 #include <linux/pm_runtime.h>
56 #include <linux/t10-pi.h>
57 #include <linux/uaccess.h>
58 #include <asm/unaligned.h>
60 #include <scsi/scsi.h>
61 #include <scsi/scsi_cmnd.h>
62 #include <scsi/scsi_dbg.h>
63 #include <scsi/scsi_device.h>
64 #include <scsi/scsi_driver.h>
65 #include <scsi/scsi_eh.h>
66 #include <scsi/scsi_host.h>
67 #include <scsi/scsi_ioctl.h>
68 #include <scsi/scsicam.h>
71 #include "scsi_priv.h"
72 #include "scsi_logging.h"
74 MODULE_AUTHOR("Eric Youngdale");
75 MODULE_DESCRIPTION("SCSI disk (sd) driver");
76 MODULE_LICENSE("GPL");
78 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
79 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
94 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
95 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
99 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
105 static void sd_config_discard(struct scsi_disk
*, unsigned int);
106 static void sd_config_write_same(struct scsi_disk
*);
107 static int sd_revalidate_disk(struct gendisk
*);
108 static void sd_unlock_native_capacity(struct gendisk
*disk
);
109 static int sd_probe(struct device
*);
110 static int sd_remove(struct device
*);
111 static void sd_shutdown(struct device
*);
112 static int sd_suspend_system(struct device
*);
113 static int sd_suspend_runtime(struct device
*);
114 static int sd_resume(struct device
*);
115 static void sd_rescan(struct device
*);
116 static int sd_init_command(struct scsi_cmnd
*SCpnt
);
117 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
118 static int sd_done(struct scsi_cmnd
*);
119 static void sd_eh_reset(struct scsi_cmnd
*);
120 static int sd_eh_action(struct scsi_cmnd
*, int);
121 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
122 static void scsi_disk_release(struct device
*cdev
);
123 static void sd_print_sense_hdr(struct scsi_disk
*, struct scsi_sense_hdr
*);
124 static void sd_print_result(const struct scsi_disk
*, const char *, int);
126 static DEFINE_SPINLOCK(sd_index_lock
);
127 static DEFINE_IDA(sd_index_ida
);
129 /* This semaphore is used to mediate the 0->1 reference get in the
130 * face of object destruction (i.e. we can't allow a get on an
131 * object after last put) */
132 static DEFINE_MUTEX(sd_ref_mutex
);
134 static struct kmem_cache
*sd_cdb_cache
;
135 static mempool_t
*sd_cdb_pool
;
137 static const char *sd_cache_types
[] = {
138 "write through", "none", "write back",
139 "write back, no read (daft)"
142 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
144 bool wc
= false, fua
= false;
152 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
156 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
157 const char *buf
, size_t count
)
159 int ct
, rcd
, wce
, sp
;
160 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
161 struct scsi_device
*sdp
= sdkp
->device
;
164 struct scsi_mode_data data
;
165 struct scsi_sense_hdr sshdr
;
166 static const char temp
[] = "temporary ";
169 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
170 /* no cache control on RBC devices; theoretically they
171 * can do it, but there's probably so many exceptions
172 * it's not worth the risk */
175 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
176 buf
+= sizeof(temp
) - 1;
177 sdkp
->cache_override
= 1;
179 sdkp
->cache_override
= 0;
182 ct
= sysfs_match_string(sd_cache_types
, buf
);
186 rcd
= ct
& 0x01 ? 1 : 0;
187 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
189 if (sdkp
->cache_override
) {
192 sd_set_flush_flag(sdkp
);
196 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
197 SD_MAX_RETRIES
, &data
, NULL
))
199 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
200 data
.block_descriptor_length
);
201 buffer_data
= buffer
+ data
.header_length
+
202 data
.block_descriptor_length
;
203 buffer_data
[2] &= ~0x05;
204 buffer_data
[2] |= wce
<< 2 | rcd
;
205 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
206 buffer_data
[0] &= ~0x80;
208 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
209 SD_MAX_RETRIES
, &data
, &sshdr
)) {
210 if (scsi_sense_valid(&sshdr
))
211 sd_print_sense_hdr(sdkp
, &sshdr
);
214 revalidate_disk(sdkp
->disk
);
219 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
222 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
223 struct scsi_device
*sdp
= sdkp
->device
;
225 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
229 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
230 const char *buf
, size_t count
)
232 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
233 struct scsi_device
*sdp
= sdkp
->device
;
235 if (!capable(CAP_SYS_ADMIN
))
238 sdp
->manage_start_stop
= simple_strtoul(buf
, NULL
, 10);
242 static DEVICE_ATTR_RW(manage_start_stop
);
245 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
247 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
249 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
253 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
254 const char *buf
, size_t count
)
256 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
257 struct scsi_device
*sdp
= sdkp
->device
;
259 if (!capable(CAP_SYS_ADMIN
))
262 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
265 sdp
->allow_restart
= simple_strtoul(buf
, NULL
, 10);
269 static DEVICE_ATTR_RW(allow_restart
);
272 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
274 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
275 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
277 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
279 static DEVICE_ATTR_RW(cache_type
);
282 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
284 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
286 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
288 static DEVICE_ATTR_RO(FUA
);
291 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
294 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
296 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
300 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
301 const char *buf
, size_t count
)
303 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
307 if (!capable(CAP_SYS_ADMIN
))
310 err
= kstrtouint(buf
, 10, &val
);
315 if (val
>= 0 && val
<= T10_PI_TYPE3_PROTECTION
)
316 sdkp
->protection_type
= val
;
320 static DEVICE_ATTR_RW(protection_type
);
323 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
326 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
327 struct scsi_device
*sdp
= sdkp
->device
;
328 unsigned int dif
, dix
;
330 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
331 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
333 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
339 return sprintf(buf
, "none\n");
341 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
343 static DEVICE_ATTR_RO(protection_mode
);
346 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
348 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
350 return sprintf(buf
, "%u\n", sdkp
->ATO
);
352 static DEVICE_ATTR_RO(app_tag_own
);
355 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
358 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
360 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
362 static DEVICE_ATTR_RO(thin_provisioning
);
364 /* sysfs_match_string() requires dense arrays */
365 static const char *lbp_mode
[] = {
366 [SD_LBP_FULL
] = "full",
367 [SD_LBP_UNMAP
] = "unmap",
368 [SD_LBP_WS16
] = "writesame_16",
369 [SD_LBP_WS10
] = "writesame_10",
370 [SD_LBP_ZERO
] = "writesame_zero",
371 [SD_LBP_DISABLE
] = "disabled",
375 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
378 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
380 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
384 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
385 const char *buf
, size_t count
)
387 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
388 struct scsi_device
*sdp
= sdkp
->device
;
391 if (!capable(CAP_SYS_ADMIN
))
394 if (sd_is_zoned(sdkp
)) {
395 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
399 if (sdp
->type
!= TYPE_DISK
)
402 mode
= sysfs_match_string(lbp_mode
, buf
);
406 sd_config_discard(sdkp
, mode
);
410 static DEVICE_ATTR_RW(provisioning_mode
);
412 /* sysfs_match_string() requires dense arrays */
413 static const char *zeroing_mode
[] = {
414 [SD_ZERO_WRITE
] = "write",
415 [SD_ZERO_WS
] = "writesame",
416 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
417 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
421 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
424 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
426 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
430 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
431 const char *buf
, size_t count
)
433 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
436 if (!capable(CAP_SYS_ADMIN
))
439 mode
= sysfs_match_string(zeroing_mode
, buf
);
443 sdkp
->zeroing_mode
= mode
;
447 static DEVICE_ATTR_RW(zeroing_mode
);
450 max_medium_access_timeouts_show(struct device
*dev
,
451 struct device_attribute
*attr
, char *buf
)
453 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
455 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
459 max_medium_access_timeouts_store(struct device
*dev
,
460 struct device_attribute
*attr
, const char *buf
,
463 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
466 if (!capable(CAP_SYS_ADMIN
))
469 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
471 return err
? err
: count
;
473 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
476 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
479 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
481 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
485 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
486 const char *buf
, size_t count
)
488 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
489 struct scsi_device
*sdp
= sdkp
->device
;
493 if (!capable(CAP_SYS_ADMIN
))
496 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
499 err
= kstrtoul(buf
, 10, &max
);
505 sdp
->no_write_same
= 1;
506 else if (max
<= SD_MAX_WS16_BLOCKS
) {
507 sdp
->no_write_same
= 0;
508 sdkp
->max_ws_blocks
= max
;
511 sd_config_write_same(sdkp
);
515 static DEVICE_ATTR_RW(max_write_same_blocks
);
517 static struct attribute
*sd_disk_attrs
[] = {
518 &dev_attr_cache_type
.attr
,
520 &dev_attr_allow_restart
.attr
,
521 &dev_attr_manage_start_stop
.attr
,
522 &dev_attr_protection_type
.attr
,
523 &dev_attr_protection_mode
.attr
,
524 &dev_attr_app_tag_own
.attr
,
525 &dev_attr_thin_provisioning
.attr
,
526 &dev_attr_provisioning_mode
.attr
,
527 &dev_attr_zeroing_mode
.attr
,
528 &dev_attr_max_write_same_blocks
.attr
,
529 &dev_attr_max_medium_access_timeouts
.attr
,
532 ATTRIBUTE_GROUPS(sd_disk
);
534 static struct class sd_disk_class
= {
536 .owner
= THIS_MODULE
,
537 .dev_release
= scsi_disk_release
,
538 .dev_groups
= sd_disk_groups
,
541 static const struct dev_pm_ops sd_pm_ops
= {
542 .suspend
= sd_suspend_system
,
544 .poweroff
= sd_suspend_system
,
545 .restore
= sd_resume
,
546 .runtime_suspend
= sd_suspend_runtime
,
547 .runtime_resume
= sd_resume
,
550 static struct scsi_driver sd_template
= {
553 .owner
= THIS_MODULE
,
556 .shutdown
= sd_shutdown
,
560 .init_command
= sd_init_command
,
561 .uninit_command
= sd_uninit_command
,
563 .eh_action
= sd_eh_action
,
564 .eh_reset
= sd_eh_reset
,
568 * Dummy kobj_map->probe function.
569 * The default ->probe function will call modprobe, which is
570 * pointless as this module is already loaded.
572 static struct kobject
*sd_default_probe(dev_t devt
, int *partno
, void *data
)
578 * Device no to disk mapping:
580 * major disc2 disc p1
581 * |............|.............|....|....| <- dev_t
584 * Inside a major, we have 16k disks, however mapped non-
585 * contiguously. The first 16 disks are for major0, the next
586 * ones with major1, ... Disk 256 is for major0 again, disk 272
588 * As we stay compatible with our numbering scheme, we can reuse
589 * the well-know SCSI majors 8, 65--71, 136--143.
591 static int sd_major(int major_idx
)
595 return SCSI_DISK0_MAJOR
;
597 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
599 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
602 return 0; /* shut up gcc */
606 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
608 struct scsi_disk
*sdkp
= NULL
;
610 mutex_lock(&sd_ref_mutex
);
612 if (disk
->private_data
) {
613 sdkp
= scsi_disk(disk
);
614 if (scsi_device_get(sdkp
->device
) == 0)
615 get_device(&sdkp
->dev
);
619 mutex_unlock(&sd_ref_mutex
);
623 static void scsi_disk_put(struct scsi_disk
*sdkp
)
625 struct scsi_device
*sdev
= sdkp
->device
;
627 mutex_lock(&sd_ref_mutex
);
628 put_device(&sdkp
->dev
);
629 scsi_device_put(sdev
);
630 mutex_unlock(&sd_ref_mutex
);
633 #ifdef CONFIG_BLK_SED_OPAL
634 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
635 size_t len
, bool send
)
637 struct scsi_device
*sdev
= data
;
641 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
643 put_unaligned_be16(spsp
, &cdb
[2]);
644 put_unaligned_be32(len
, &cdb
[6]);
646 ret
= scsi_execute_req(sdev
, cdb
,
647 send
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
,
648 buffer
, len
, NULL
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
649 return ret
<= 0 ? ret
: -EIO
;
651 #endif /* CONFIG_BLK_SED_OPAL */
653 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
654 unsigned int dix
, unsigned int dif
)
656 struct bio
*bio
= scmd
->request
->bio
;
657 unsigned int prot_op
= sd_prot_op(rq_data_dir(scmd
->request
), dix
, dif
);
658 unsigned int protect
= 0;
660 if (dix
) { /* DIX Type 0, 1, 2, 3 */
661 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
662 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
664 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
665 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
668 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
669 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
671 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
672 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
675 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
676 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
678 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
679 protect
= 3 << 5; /* Disable target PI checking */
681 protect
= 1 << 5; /* Enable target PI checking */
684 scsi_set_prot_op(scmd
, prot_op
);
685 scsi_set_prot_type(scmd
, dif
);
686 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
691 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
693 struct request_queue
*q
= sdkp
->disk
->queue
;
694 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
695 unsigned int max_blocks
= 0;
697 q
->limits
.discard_alignment
=
698 sdkp
->unmap_alignment
* logical_block_size
;
699 q
->limits
.discard_granularity
=
700 max(sdkp
->physical_block_size
,
701 sdkp
->unmap_granularity
* logical_block_size
);
702 sdkp
->provisioning_mode
= mode
;
708 blk_queue_max_discard_sectors(q
, 0);
709 queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD
, q
);
713 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
714 (u32
)SD_MAX_WS16_BLOCKS
);
718 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
719 (u32
)SD_MAX_WS16_BLOCKS
);
723 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
724 (u32
)SD_MAX_WS10_BLOCKS
);
728 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
729 (u32
)SD_MAX_WS10_BLOCKS
);
733 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
734 queue_flag_set_unlocked(QUEUE_FLAG_DISCARD
, q
);
737 static int sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
739 struct scsi_device
*sdp
= cmd
->device
;
740 struct request
*rq
= cmd
->request
;
741 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
742 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
743 unsigned int data_len
= 24;
746 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
747 if (!rq
->special_vec
.bv_page
)
748 return BLKPREP_DEFER
;
749 rq
->special_vec
.bv_offset
= 0;
750 rq
->special_vec
.bv_len
= data_len
;
751 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
754 cmd
->cmnd
[0] = UNMAP
;
757 buf
= page_address(rq
->special_vec
.bv_page
);
758 put_unaligned_be16(6 + 16, &buf
[0]);
759 put_unaligned_be16(16, &buf
[2]);
760 put_unaligned_be64(sector
, &buf
[8]);
761 put_unaligned_be32(nr_sectors
, &buf
[16]);
763 cmd
->allowed
= SD_MAX_RETRIES
;
764 cmd
->transfersize
= data_len
;
765 rq
->timeout
= SD_TIMEOUT
;
766 scsi_req(rq
)->resid_len
= data_len
;
768 return scsi_init_io(cmd
);
771 static int sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
773 struct scsi_device
*sdp
= cmd
->device
;
774 struct request
*rq
= cmd
->request
;
775 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
776 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
777 u32 data_len
= sdp
->sector_size
;
779 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
780 if (!rq
->special_vec
.bv_page
)
781 return BLKPREP_DEFER
;
782 rq
->special_vec
.bv_offset
= 0;
783 rq
->special_vec
.bv_len
= data_len
;
784 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
787 cmd
->cmnd
[0] = WRITE_SAME_16
;
789 cmd
->cmnd
[1] = 0x8; /* UNMAP */
790 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
791 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
793 cmd
->allowed
= SD_MAX_RETRIES
;
794 cmd
->transfersize
= data_len
;
795 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
796 scsi_req(rq
)->resid_len
= data_len
;
798 return scsi_init_io(cmd
);
801 static int sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
803 struct scsi_device
*sdp
= cmd
->device
;
804 struct request
*rq
= cmd
->request
;
805 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
806 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
807 u32 data_len
= sdp
->sector_size
;
809 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
810 if (!rq
->special_vec
.bv_page
)
811 return BLKPREP_DEFER
;
812 rq
->special_vec
.bv_offset
= 0;
813 rq
->special_vec
.bv_len
= data_len
;
814 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
817 cmd
->cmnd
[0] = WRITE_SAME
;
819 cmd
->cmnd
[1] = 0x8; /* UNMAP */
820 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
821 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
823 cmd
->allowed
= SD_MAX_RETRIES
;
824 cmd
->transfersize
= data_len
;
825 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
826 scsi_req(rq
)->resid_len
= data_len
;
828 return scsi_init_io(cmd
);
831 static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
833 struct request
*rq
= cmd
->request
;
834 struct scsi_device
*sdp
= cmd
->device
;
835 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
836 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
837 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
840 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
841 switch (sdkp
->zeroing_mode
) {
842 case SD_ZERO_WS16_UNMAP
:
843 ret
= sd_setup_write_same16_cmnd(cmd
, true);
845 case SD_ZERO_WS10_UNMAP
:
846 ret
= sd_setup_write_same10_cmnd(cmd
, true);
851 if (sdp
->no_write_same
)
852 return BLKPREP_INVALID
;
854 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff)
855 ret
= sd_setup_write_same16_cmnd(cmd
, false);
857 ret
= sd_setup_write_same10_cmnd(cmd
, false);
860 if (sd_is_zoned(sdkp
) && ret
== BLKPREP_OK
)
861 return sd_zbc_write_lock_zone(cmd
);
866 static void sd_config_write_same(struct scsi_disk
*sdkp
)
868 struct request_queue
*q
= sdkp
->disk
->queue
;
869 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
871 if (sdkp
->device
->no_write_same
) {
872 sdkp
->max_ws_blocks
= 0;
876 /* Some devices can not handle block counts above 0xffff despite
877 * supporting WRITE SAME(16). Consequently we default to 64k
878 * blocks per I/O unless the device explicitly advertises a
881 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
882 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
883 (u32
)SD_MAX_WS16_BLOCKS
);
884 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
885 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
886 (u32
)SD_MAX_WS10_BLOCKS
);
888 sdkp
->device
->no_write_same
= 1;
889 sdkp
->max_ws_blocks
= 0;
892 if (sdkp
->lbprz
&& sdkp
->lbpws
)
893 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
894 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
895 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
896 else if (sdkp
->max_ws_blocks
)
897 sdkp
->zeroing_mode
= SD_ZERO_WS
;
899 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
902 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
903 (logical_block_size
>> 9));
904 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
905 (logical_block_size
>> 9));
909 * sd_setup_write_same_cmnd - write the same data to multiple blocks
910 * @cmd: command to prepare
912 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
913 * the preference indicated by the target device.
915 static int sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
917 struct request
*rq
= cmd
->request
;
918 struct scsi_device
*sdp
= cmd
->device
;
919 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
920 struct bio
*bio
= rq
->bio
;
921 sector_t sector
= blk_rq_pos(rq
);
922 unsigned int nr_sectors
= blk_rq_sectors(rq
);
923 unsigned int nr_bytes
= blk_rq_bytes(rq
);
926 if (sdkp
->device
->no_write_same
)
927 return BLKPREP_INVALID
;
929 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
931 if (sd_is_zoned(sdkp
)) {
932 ret
= sd_zbc_write_lock_zone(cmd
);
933 if (ret
!= BLKPREP_OK
)
937 sector
>>= ilog2(sdp
->sector_size
) - 9;
938 nr_sectors
>>= ilog2(sdp
->sector_size
) - 9;
940 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
942 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff) {
944 cmd
->cmnd
[0] = WRITE_SAME_16
;
945 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
946 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
949 cmd
->cmnd
[0] = WRITE_SAME
;
950 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
951 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
954 cmd
->transfersize
= sdp
->sector_size
;
955 cmd
->allowed
= SD_MAX_RETRIES
;
958 * For WRITE SAME the data transferred via the DATA OUT buffer is
959 * different from the amount of data actually written to the target.
961 * We set up __data_len to the amount of data transferred via the
962 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
963 * to transfer a single sector of data first, but then reset it to
964 * the amount of data to be written right after so that the I/O path
965 * knows how much to actually write.
967 rq
->__data_len
= sdp
->sector_size
;
968 ret
= scsi_init_io(cmd
);
969 rq
->__data_len
= nr_bytes
;
971 if (sd_is_zoned(sdkp
) && ret
!= BLKPREP_OK
)
972 sd_zbc_write_unlock_zone(cmd
);
977 static int sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
979 struct request
*rq
= cmd
->request
;
981 /* flush requests don't perform I/O, zero the S/G table */
982 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
984 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
986 cmd
->transfersize
= 0;
987 cmd
->allowed
= SD_MAX_RETRIES
;
989 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
993 static int sd_setup_read_write_cmnd(struct scsi_cmnd
*SCpnt
)
995 struct request
*rq
= SCpnt
->request
;
996 struct scsi_device
*sdp
= SCpnt
->device
;
997 struct gendisk
*disk
= rq
->rq_disk
;
998 struct scsi_disk
*sdkp
= scsi_disk(disk
);
999 sector_t block
= blk_rq_pos(rq
);
1001 unsigned int this_count
= blk_rq_sectors(rq
);
1002 unsigned int dif
, dix
;
1003 bool zoned_write
= sd_is_zoned(sdkp
) && rq_data_dir(rq
) == WRITE
;
1005 unsigned char protect
;
1008 ret
= sd_zbc_write_lock_zone(SCpnt
);
1009 if (ret
!= BLKPREP_OK
)
1013 ret
= scsi_init_io(SCpnt
);
1014 if (ret
!= BLKPREP_OK
)
1016 SCpnt
= rq
->special
;
1018 /* from here on until we're complete, any goto out
1019 * is used for a killable error condition */
1023 scmd_printk(KERN_INFO
, SCpnt
,
1024 "%s: block=%llu, count=%d\n",
1025 __func__
, (unsigned long long)block
, this_count
));
1027 if (!sdp
|| !scsi_device_online(sdp
) ||
1028 block
+ blk_rq_sectors(rq
) > get_capacity(disk
)) {
1029 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1030 "Finishing %u sectors\n",
1031 blk_rq_sectors(rq
)));
1032 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1033 "Retry with 0x%p\n", SCpnt
));
1039 * quietly refuse to do anything to a changed disc until
1040 * the changed bit has been reset
1042 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
1047 * Some SD card readers can't handle multi-sector accesses which touch
1048 * the last one or two hardware sectors. Split accesses as needed.
1050 threshold
= get_capacity(disk
) - SD_LAST_BUGGY_SECTORS
*
1051 (sdp
->sector_size
/ 512);
1053 if (unlikely(sdp
->last_sector_bug
&& block
+ this_count
> threshold
)) {
1054 if (block
< threshold
) {
1055 /* Access up to the threshold but not beyond */
1056 this_count
= threshold
- block
;
1058 /* Access only a single hardware sector */
1059 this_count
= sdp
->sector_size
/ 512;
1063 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
, "block=%llu\n",
1064 (unsigned long long)block
));
1067 * If we have a 1K hardware sectorsize, prevent access to single
1068 * 512 byte sectors. In theory we could handle this - in fact
1069 * the scsi cdrom driver must be able to handle this because
1070 * we typically use 1K blocksizes, and cdroms typically have
1071 * 2K hardware sectorsizes. Of course, things are simpler
1072 * with the cdrom, since it is read-only. For performance
1073 * reasons, the filesystems should be able to handle this
1074 * and not force the scsi disk driver to use bounce buffers
1077 if (sdp
->sector_size
== 1024) {
1078 if ((block
& 1) || (blk_rq_sectors(rq
) & 1)) {
1079 scmd_printk(KERN_ERR
, SCpnt
,
1080 "Bad block number requested\n");
1084 this_count
= this_count
>> 1;
1087 if (sdp
->sector_size
== 2048) {
1088 if ((block
& 3) || (blk_rq_sectors(rq
) & 3)) {
1089 scmd_printk(KERN_ERR
, SCpnt
,
1090 "Bad block number requested\n");
1094 this_count
= this_count
>> 2;
1097 if (sdp
->sector_size
== 4096) {
1098 if ((block
& 7) || (blk_rq_sectors(rq
) & 7)) {
1099 scmd_printk(KERN_ERR
, SCpnt
,
1100 "Bad block number requested\n");
1104 this_count
= this_count
>> 3;
1107 if (rq_data_dir(rq
) == WRITE
) {
1108 SCpnt
->cmnd
[0] = WRITE_6
;
1110 if (blk_integrity_rq(rq
))
1111 sd_dif_prepare(SCpnt
);
1113 } else if (rq_data_dir(rq
) == READ
) {
1114 SCpnt
->cmnd
[0] = READ_6
;
1116 scmd_printk(KERN_ERR
, SCpnt
, "Unknown command %d\n", req_op(rq
));
1120 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1121 "%s %d/%u 512 byte blocks.\n",
1122 (rq_data_dir(rq
) == WRITE
) ?
1123 "writing" : "reading", this_count
,
1124 blk_rq_sectors(rq
)));
1126 dix
= scsi_prot_sg_count(SCpnt
);
1127 dif
= scsi_host_dif_capable(SCpnt
->device
->host
, sdkp
->protection_type
);
1130 protect
= sd_setup_protect_cmnd(SCpnt
, dix
, dif
);
1134 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1135 SCpnt
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1137 if (unlikely(SCpnt
->cmnd
== NULL
)) {
1138 ret
= BLKPREP_DEFER
;
1142 SCpnt
->cmd_len
= SD_EXT_CDB_SIZE
;
1143 memset(SCpnt
->cmnd
, 0, SCpnt
->cmd_len
);
1144 SCpnt
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1145 SCpnt
->cmnd
[7] = 0x18;
1146 SCpnt
->cmnd
[9] = (rq_data_dir(rq
) == READ
) ? READ_32
: WRITE_32
;
1147 SCpnt
->cmnd
[10] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1150 SCpnt
->cmnd
[12] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1151 SCpnt
->cmnd
[13] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1152 SCpnt
->cmnd
[14] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1153 SCpnt
->cmnd
[15] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1154 SCpnt
->cmnd
[16] = (unsigned char) (block
>> 24) & 0xff;
1155 SCpnt
->cmnd
[17] = (unsigned char) (block
>> 16) & 0xff;
1156 SCpnt
->cmnd
[18] = (unsigned char) (block
>> 8) & 0xff;
1157 SCpnt
->cmnd
[19] = (unsigned char) block
& 0xff;
1159 /* Expected Indirect LBA */
1160 SCpnt
->cmnd
[20] = (unsigned char) (block
>> 24) & 0xff;
1161 SCpnt
->cmnd
[21] = (unsigned char) (block
>> 16) & 0xff;
1162 SCpnt
->cmnd
[22] = (unsigned char) (block
>> 8) & 0xff;
1163 SCpnt
->cmnd
[23] = (unsigned char) block
& 0xff;
1165 /* Transfer length */
1166 SCpnt
->cmnd
[28] = (unsigned char) (this_count
>> 24) & 0xff;
1167 SCpnt
->cmnd
[29] = (unsigned char) (this_count
>> 16) & 0xff;
1168 SCpnt
->cmnd
[30] = (unsigned char) (this_count
>> 8) & 0xff;
1169 SCpnt
->cmnd
[31] = (unsigned char) this_count
& 0xff;
1170 } else if (sdp
->use_16_for_rw
|| (this_count
> 0xffff)) {
1171 SCpnt
->cmnd
[0] += READ_16
- READ_6
;
1172 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1173 SCpnt
->cmnd
[2] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1174 SCpnt
->cmnd
[3] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1175 SCpnt
->cmnd
[4] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1176 SCpnt
->cmnd
[5] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1177 SCpnt
->cmnd
[6] = (unsigned char) (block
>> 24) & 0xff;
1178 SCpnt
->cmnd
[7] = (unsigned char) (block
>> 16) & 0xff;
1179 SCpnt
->cmnd
[8] = (unsigned char) (block
>> 8) & 0xff;
1180 SCpnt
->cmnd
[9] = (unsigned char) block
& 0xff;
1181 SCpnt
->cmnd
[10] = (unsigned char) (this_count
>> 24) & 0xff;
1182 SCpnt
->cmnd
[11] = (unsigned char) (this_count
>> 16) & 0xff;
1183 SCpnt
->cmnd
[12] = (unsigned char) (this_count
>> 8) & 0xff;
1184 SCpnt
->cmnd
[13] = (unsigned char) this_count
& 0xff;
1185 SCpnt
->cmnd
[14] = SCpnt
->cmnd
[15] = 0;
1186 } else if ((this_count
> 0xff) || (block
> 0x1fffff) ||
1187 scsi_device_protection(SCpnt
->device
) ||
1188 SCpnt
->device
->use_10_for_rw
) {
1189 SCpnt
->cmnd
[0] += READ_10
- READ_6
;
1190 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1191 SCpnt
->cmnd
[2] = (unsigned char) (block
>> 24) & 0xff;
1192 SCpnt
->cmnd
[3] = (unsigned char) (block
>> 16) & 0xff;
1193 SCpnt
->cmnd
[4] = (unsigned char) (block
>> 8) & 0xff;
1194 SCpnt
->cmnd
[5] = (unsigned char) block
& 0xff;
1195 SCpnt
->cmnd
[6] = SCpnt
->cmnd
[9] = 0;
1196 SCpnt
->cmnd
[7] = (unsigned char) (this_count
>> 8) & 0xff;
1197 SCpnt
->cmnd
[8] = (unsigned char) this_count
& 0xff;
1199 if (unlikely(rq
->cmd_flags
& REQ_FUA
)) {
1201 * This happens only if this drive failed
1202 * 10byte rw command with ILLEGAL_REQUEST
1203 * during operation and thus turned off
1206 scmd_printk(KERN_ERR
, SCpnt
,
1207 "FUA write on READ/WRITE(6) drive\n");
1211 SCpnt
->cmnd
[1] |= (unsigned char) ((block
>> 16) & 0x1f);
1212 SCpnt
->cmnd
[2] = (unsigned char) ((block
>> 8) & 0xff);
1213 SCpnt
->cmnd
[3] = (unsigned char) block
& 0xff;
1214 SCpnt
->cmnd
[4] = (unsigned char) this_count
;
1217 SCpnt
->sdb
.length
= this_count
* sdp
->sector_size
;
1220 * We shouldn't disconnect in the middle of a sector, so with a dumb
1221 * host adapter, it's safe to assume that we can at least transfer
1222 * this many bytes between each connect / disconnect.
1224 SCpnt
->transfersize
= sdp
->sector_size
;
1225 SCpnt
->underflow
= this_count
<< 9;
1226 SCpnt
->allowed
= SD_MAX_RETRIES
;
1229 * This indicates that the command is ready from our end to be
1234 if (zoned_write
&& ret
!= BLKPREP_OK
)
1235 sd_zbc_write_unlock_zone(SCpnt
);
1240 static int sd_init_command(struct scsi_cmnd
*cmd
)
1242 struct request
*rq
= cmd
->request
;
1244 switch (req_op(rq
)) {
1245 case REQ_OP_DISCARD
:
1246 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1248 return sd_setup_unmap_cmnd(cmd
);
1250 return sd_setup_write_same16_cmnd(cmd
, true);
1252 return sd_setup_write_same10_cmnd(cmd
, true);
1254 return sd_setup_write_same10_cmnd(cmd
, false);
1256 return BLKPREP_INVALID
;
1258 case REQ_OP_WRITE_ZEROES
:
1259 return sd_setup_write_zeroes_cmnd(cmd
);
1260 case REQ_OP_WRITE_SAME
:
1261 return sd_setup_write_same_cmnd(cmd
);
1263 return sd_setup_flush_cmnd(cmd
);
1266 return sd_setup_read_write_cmnd(cmd
);
1267 case REQ_OP_ZONE_REPORT
:
1268 return sd_zbc_setup_report_cmnd(cmd
);
1269 case REQ_OP_ZONE_RESET
:
1270 return sd_zbc_setup_reset_cmnd(cmd
);
1276 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1278 struct request
*rq
= SCpnt
->request
;
1280 if (SCpnt
->flags
& SCMD_ZONE_WRITE_LOCK
)
1281 sd_zbc_write_unlock_zone(SCpnt
);
1283 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1284 __free_page(rq
->special_vec
.bv_page
);
1286 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1287 mempool_free(SCpnt
->cmnd
, sd_cdb_pool
);
1294 * sd_open - open a scsi disk device
1295 * @bdev: Block device of the scsi disk to open
1296 * @mode: FMODE_* mask
1298 * Returns 0 if successful. Returns a negated errno value in case
1301 * Note: This can be called from a user context (e.g. fsck(1) )
1302 * or from within the kernel (e.g. as a result of a mount(1) ).
1303 * In the latter case @inode and @filp carry an abridged amount
1304 * of information as noted above.
1306 * Locking: called with bdev->bd_mutex held.
1308 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1310 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1311 struct scsi_device
*sdev
;
1317 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1319 sdev
= sdkp
->device
;
1322 * If the device is in error recovery, wait until it is done.
1323 * If the device is offline, then disallow any access to it.
1326 if (!scsi_block_when_processing_errors(sdev
))
1329 if (sdev
->removable
|| sdkp
->write_prot
)
1330 check_disk_change(bdev
);
1333 * If the drive is empty, just let the open fail.
1335 retval
= -ENOMEDIUM
;
1336 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1340 * If the device has the write protect tab set, have the open fail
1341 * if the user expects to be able to write to the thing.
1344 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1348 * It is possible that the disk changing stuff resulted in
1349 * the device being taken offline. If this is the case,
1350 * report this to the user, and don't pretend that the
1351 * open actually succeeded.
1354 if (!scsi_device_online(sdev
))
1357 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1358 if (scsi_block_when_processing_errors(sdev
))
1359 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1365 scsi_disk_put(sdkp
);
1370 * sd_release - invoked when the (last) close(2) is called on this
1372 * @disk: disk to release
1373 * @mode: FMODE_* mask
1377 * Note: may block (uninterruptible) if error recovery is underway
1380 * Locking: called with bdev->bd_mutex held.
1382 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1384 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1385 struct scsi_device
*sdev
= sdkp
->device
;
1387 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1389 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1390 if (scsi_block_when_processing_errors(sdev
))
1391 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1395 * XXX and what if there are packets in flight and this close()
1396 * XXX is followed by a "rmmod sd_mod"?
1399 scsi_disk_put(sdkp
);
1402 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1404 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1405 struct scsi_device
*sdp
= sdkp
->device
;
1406 struct Scsi_Host
*host
= sdp
->host
;
1407 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1410 /* default to most commonly used values */
1411 diskinfo
[0] = 0x40; /* 1 << 6 */
1412 diskinfo
[1] = 0x20; /* 1 << 5 */
1413 diskinfo
[2] = capacity
>> 11;
1415 /* override with calculated, extended default, or driver values */
1416 if (host
->hostt
->bios_param
)
1417 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1419 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1421 geo
->heads
= diskinfo
[0];
1422 geo
->sectors
= diskinfo
[1];
1423 geo
->cylinders
= diskinfo
[2];
1428 * sd_ioctl - process an ioctl
1429 * @bdev: target block device
1430 * @mode: FMODE_* mask
1431 * @cmd: ioctl command number
1432 * @arg: this is third argument given to ioctl(2) system call.
1433 * Often contains a pointer.
1435 * Returns 0 if successful (some ioctls return positive numbers on
1436 * success as well). Returns a negated errno value in case of error.
1438 * Note: most ioctls are forward onto the block subsystem or further
1439 * down in the scsi subsystem.
1441 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1442 unsigned int cmd
, unsigned long arg
)
1444 struct gendisk
*disk
= bdev
->bd_disk
;
1445 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1446 struct scsi_device
*sdp
= sdkp
->device
;
1447 void __user
*p
= (void __user
*)arg
;
1450 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1451 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1453 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1458 * If we are in the middle of error recovery, don't let anyone
1459 * else try and use this device. Also, if error recovery fails, it
1460 * may try and take the device offline, in which case all further
1461 * access to the device is prohibited.
1463 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1464 (mode
& FMODE_NDELAY
) != 0);
1468 if (is_sed_ioctl(cmd
))
1469 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1472 * Send SCSI addressing ioctls directly to mid level, send other
1473 * ioctls to block level and then onto mid level if they can't be
1477 case SCSI_IOCTL_GET_IDLUN
:
1478 case SCSI_IOCTL_GET_BUS_NUMBER
:
1479 error
= scsi_ioctl(sdp
, cmd
, p
);
1482 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1483 if (error
!= -ENOTTY
)
1485 error
= scsi_ioctl(sdp
, cmd
, p
);
1492 static void set_media_not_present(struct scsi_disk
*sdkp
)
1494 if (sdkp
->media_present
)
1495 sdkp
->device
->changed
= 1;
1497 if (sdkp
->device
->removable
) {
1498 sdkp
->media_present
= 0;
1503 static int media_not_present(struct scsi_disk
*sdkp
,
1504 struct scsi_sense_hdr
*sshdr
)
1506 if (!scsi_sense_valid(sshdr
))
1509 /* not invoked for commands that could return deferred errors */
1510 switch (sshdr
->sense_key
) {
1511 case UNIT_ATTENTION
:
1513 /* medium not present */
1514 if (sshdr
->asc
== 0x3A) {
1515 set_media_not_present(sdkp
);
1523 * sd_check_events - check media events
1524 * @disk: kernel device descriptor
1525 * @clearing: disk events currently being cleared
1527 * Returns mask of DISK_EVENT_*.
1529 * Note: this function is invoked from the block subsystem.
1531 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1533 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1534 struct scsi_device
*sdp
;
1541 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1544 * If the device is offline, don't send any commands - just pretend as
1545 * if the command failed. If the device ever comes back online, we
1546 * can deal with it then. It is only because of unrecoverable errors
1547 * that we would ever take a device offline in the first place.
1549 if (!scsi_device_online(sdp
)) {
1550 set_media_not_present(sdkp
);
1555 * Using TEST_UNIT_READY enables differentiation between drive with
1556 * no cartridge loaded - NOT READY, drive with changed cartridge -
1557 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1559 * Drives that auto spin down. eg iomega jaz 1G, will be started
1560 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1561 * sd_revalidate() is called.
1563 if (scsi_block_when_processing_errors(sdp
)) {
1564 struct scsi_sense_hdr sshdr
= { 0, };
1566 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1569 /* failed to execute TUR, assume media not present */
1570 if (host_byte(retval
)) {
1571 set_media_not_present(sdkp
);
1575 if (media_not_present(sdkp
, &sshdr
))
1580 * For removable scsi disk we have to recognise the presence
1581 * of a disk in the drive.
1583 if (!sdkp
->media_present
)
1585 sdkp
->media_present
= 1;
1588 * sdp->changed is set under the following conditions:
1590 * Medium present state has changed in either direction.
1591 * Device has indicated UNIT_ATTENTION.
1593 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1595 scsi_disk_put(sdkp
);
1599 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1602 struct scsi_device
*sdp
= sdkp
->device
;
1603 const int timeout
= sdp
->request_queue
->rq_timeout
1604 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1605 struct scsi_sense_hdr my_sshdr
;
1607 if (!scsi_device_online(sdp
))
1610 /* caller might not be interested in sense, but we need it */
1614 for (retries
= 3; retries
> 0; --retries
) {
1615 unsigned char cmd
[10] = { 0 };
1617 cmd
[0] = SYNCHRONIZE_CACHE
;
1619 * Leave the rest of the command zero to indicate
1622 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1623 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1629 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1631 if (driver_byte(res
) & DRIVER_SENSE
)
1632 sd_print_sense_hdr(sdkp
, sshdr
);
1634 /* we need to evaluate the error return */
1635 if (scsi_sense_valid(sshdr
) &&
1636 (sshdr
->asc
== 0x3a || /* medium not present */
1637 sshdr
->asc
== 0x20)) /* invalid command */
1638 /* this is no error here */
1641 switch (host_byte(res
)) {
1642 /* ignore errors due to racing a disconnection */
1643 case DID_BAD_TARGET
:
1644 case DID_NO_CONNECT
:
1646 /* signal the upper layer it might try again */
1650 case DID_SOFT_ERROR
:
1659 static void sd_rescan(struct device
*dev
)
1661 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1663 revalidate_disk(sdkp
->disk
);
1667 #ifdef CONFIG_COMPAT
1669 * This gets directly called from VFS. When the ioctl
1670 * is not recognized we go back to the other translation paths.
1672 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1673 unsigned int cmd
, unsigned long arg
)
1675 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1678 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1679 (mode
& FMODE_NDELAY
) != 0);
1684 * Let the static ioctl translation table take care of it.
1686 if (!sdev
->host
->hostt
->compat_ioctl
)
1687 return -ENOIOCTLCMD
;
1688 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1692 static char sd_pr_type(enum pr_type type
)
1695 case PR_WRITE_EXCLUSIVE
:
1697 case PR_EXCLUSIVE_ACCESS
:
1699 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1701 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1703 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1705 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1712 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1713 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1715 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1716 struct scsi_sense_hdr sshdr
;
1718 u8 cmd
[16] = { 0, };
1719 u8 data
[24] = { 0, };
1721 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1724 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1726 put_unaligned_be64(key
, &data
[0]);
1727 put_unaligned_be64(sa_key
, &data
[8]);
1730 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1731 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1733 if ((driver_byte(result
) & DRIVER_SENSE
) &&
1734 (scsi_sense_valid(&sshdr
))) {
1735 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1736 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1742 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1745 if (flags
& ~PR_FL_IGNORE_KEY
)
1747 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1748 old_key
, new_key
, 0,
1749 (1 << 0) /* APTPL */);
1752 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1757 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1760 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1762 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1765 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1766 enum pr_type type
, bool abort
)
1768 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1769 sd_pr_type(type
), 0);
1772 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1774 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1777 static const struct pr_ops sd_pr_ops
= {
1778 .pr_register
= sd_pr_register
,
1779 .pr_reserve
= sd_pr_reserve
,
1780 .pr_release
= sd_pr_release
,
1781 .pr_preempt
= sd_pr_preempt
,
1782 .pr_clear
= sd_pr_clear
,
1785 static const struct block_device_operations sd_fops
= {
1786 .owner
= THIS_MODULE
,
1788 .release
= sd_release
,
1790 .getgeo
= sd_getgeo
,
1791 #ifdef CONFIG_COMPAT
1792 .compat_ioctl
= sd_compat_ioctl
,
1794 .check_events
= sd_check_events
,
1795 .revalidate_disk
= sd_revalidate_disk
,
1796 .unlock_native_capacity
= sd_unlock_native_capacity
,
1797 .pr_ops
= &sd_pr_ops
,
1801 * sd_eh_reset - reset error handling callback
1802 * @scmd: sd-issued command that has failed
1804 * This function is called by the SCSI midlayer before starting
1805 * SCSI EH. When counting medium access failures we have to be
1806 * careful to register it only only once per device and SCSI EH run;
1807 * there might be several timed out commands which will cause the
1808 * 'max_medium_access_timeouts' counter to trigger after the first
1809 * SCSI EH run already and set the device to offline.
1810 * So this function resets the internal counter before starting SCSI EH.
1812 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1814 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1816 /* New SCSI EH run, reset gate variable */
1817 sdkp
->ignore_medium_access_errors
= false;
1821 * sd_eh_action - error handling callback
1822 * @scmd: sd-issued command that has failed
1823 * @eh_disp: The recovery disposition suggested by the midlayer
1825 * This function is called by the SCSI midlayer upon completion of an
1826 * error test command (currently TEST UNIT READY). The result of sending
1827 * the eh command is passed in eh_disp. We're looking for devices that
1828 * fail medium access commands but are OK with non access commands like
1829 * test unit ready (so wrongly see the device as having a successful
1832 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1834 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1835 struct scsi_device
*sdev
= scmd
->device
;
1837 if (!scsi_device_online(sdev
) ||
1838 !scsi_medium_access_command(scmd
) ||
1839 host_byte(scmd
->result
) != DID_TIME_OUT
||
1844 * The device has timed out executing a medium access command.
1845 * However, the TEST UNIT READY command sent during error
1846 * handling completed successfully. Either the device is in the
1847 * process of recovering or has it suffered an internal failure
1848 * that prevents access to the storage medium.
1850 if (!sdkp
->ignore_medium_access_errors
) {
1851 sdkp
->medium_access_timed_out
++;
1852 sdkp
->ignore_medium_access_errors
= true;
1856 * If the device keeps failing read/write commands but TEST UNIT
1857 * READY always completes successfully we assume that medium
1858 * access is no longer possible and take the device offline.
1860 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1861 scmd_printk(KERN_ERR
, scmd
,
1862 "Medium access timeout failure. Offlining disk!\n");
1863 mutex_lock(&sdev
->state_mutex
);
1864 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1865 mutex_unlock(&sdev
->state_mutex
);
1873 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1875 struct request
*req
= scmd
->request
;
1876 struct scsi_device
*sdev
= scmd
->device
;
1877 unsigned int transferred
, good_bytes
;
1878 u64 start_lba
, end_lba
, bad_lba
;
1881 * Some commands have a payload smaller than the device logical
1882 * block size (e.g. INQUIRY on a 4K disk).
1884 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1887 /* Check if we have a 'bad_lba' information */
1888 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1889 SCSI_SENSE_BUFFERSIZE
,
1894 * If the bad lba was reported incorrectly, we have no idea where
1897 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1898 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1899 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1903 * resid is optional but mostly filled in. When it's unused,
1904 * its value is zero, so we assume the whole buffer transferred
1906 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1908 /* This computation should always be done in terms of the
1909 * resolution of the device's medium.
1911 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1913 return min(good_bytes
, transferred
);
1917 * sd_done - bottom half handler: called when the lower level
1918 * driver has completed (successfully or otherwise) a scsi command.
1919 * @SCpnt: mid-level's per command structure.
1921 * Note: potentially run from within an ISR. Must not block.
1923 static int sd_done(struct scsi_cmnd
*SCpnt
)
1925 int result
= SCpnt
->result
;
1926 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1927 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1929 struct scsi_sense_hdr sshdr
;
1930 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1931 struct request
*req
= SCpnt
->request
;
1932 int sense_valid
= 0;
1933 int sense_deferred
= 0;
1935 switch (req_op(req
)) {
1936 case REQ_OP_DISCARD
:
1937 case REQ_OP_WRITE_ZEROES
:
1938 case REQ_OP_WRITE_SAME
:
1939 case REQ_OP_ZONE_RESET
:
1941 good_bytes
= blk_rq_bytes(req
);
1942 scsi_set_resid(SCpnt
, 0);
1945 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1948 case REQ_OP_ZONE_REPORT
:
1950 good_bytes
= scsi_bufflen(SCpnt
)
1951 - scsi_get_resid(SCpnt
);
1952 scsi_set_resid(SCpnt
, 0);
1955 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1960 * In case of bogus fw or device, we could end up having
1961 * an unaligned partial completion. Check this here and force
1964 resid
= scsi_get_resid(SCpnt
);
1965 if (resid
& (sector_size
- 1)) {
1966 sd_printk(KERN_INFO
, sdkp
,
1967 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1968 resid
, sector_size
);
1969 resid
= min(scsi_bufflen(SCpnt
),
1970 round_up(resid
, sector_size
));
1971 scsi_set_resid(SCpnt
, resid
);
1976 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
1978 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
1980 sdkp
->medium_access_timed_out
= 0;
1982 if (driver_byte(result
) != DRIVER_SENSE
&&
1983 (!sense_valid
|| sense_deferred
))
1986 switch (sshdr
.sense_key
) {
1987 case HARDWARE_ERROR
:
1989 good_bytes
= sd_completed_bytes(SCpnt
);
1991 case RECOVERED_ERROR
:
1992 good_bytes
= scsi_bufflen(SCpnt
);
1995 /* This indicates a false check condition, so ignore it. An
1996 * unknown amount of data was transferred so treat it as an
2000 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2002 case ABORTED_COMMAND
:
2003 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2004 good_bytes
= sd_completed_bytes(SCpnt
);
2006 case ILLEGAL_REQUEST
:
2007 switch (sshdr
.asc
) {
2008 case 0x10: /* DIX: Host detected corruption */
2009 good_bytes
= sd_completed_bytes(SCpnt
);
2011 case 0x20: /* INVALID COMMAND OPCODE */
2012 case 0x24: /* INVALID FIELD IN CDB */
2013 switch (SCpnt
->cmnd
[0]) {
2015 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2019 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2020 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2022 sdkp
->device
->no_write_same
= 1;
2023 sd_config_write_same(sdkp
);
2024 req
->__data_len
= blk_rq_bytes(req
);
2025 req
->rq_flags
|= RQF_QUIET
;
2036 if (sd_is_zoned(sdkp
))
2037 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2039 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2040 "sd_done: completed %d of %d bytes\n",
2041 good_bytes
, scsi_bufflen(SCpnt
)));
2043 if (rq_data_dir(SCpnt
->request
) == READ
&& scsi_prot_sg_count(SCpnt
))
2044 sd_dif_complete(SCpnt
, good_bytes
);
2050 * spinup disk - called only in sd_revalidate_disk()
2053 sd_spinup_disk(struct scsi_disk
*sdkp
)
2055 unsigned char cmd
[10];
2056 unsigned long spintime_expire
= 0;
2057 int retries
, spintime
;
2058 unsigned int the_result
;
2059 struct scsi_sense_hdr sshdr
;
2060 int sense_valid
= 0;
2064 /* Spin up drives, as required. Only do this at boot time */
2065 /* Spinup needs to be done for module loads too. */
2070 cmd
[0] = TEST_UNIT_READY
;
2071 memset((void *) &cmd
[1], 0, 9);
2073 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2076 SD_MAX_RETRIES
, NULL
);
2079 * If the drive has indicated to us that it
2080 * doesn't have any media in it, don't bother
2081 * with any more polling.
2083 if (media_not_present(sdkp
, &sshdr
))
2087 sense_valid
= scsi_sense_valid(&sshdr
);
2089 } while (retries
< 3 &&
2090 (!scsi_status_is_good(the_result
) ||
2091 ((driver_byte(the_result
) & DRIVER_SENSE
) &&
2092 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2094 if ((driver_byte(the_result
) & DRIVER_SENSE
) == 0) {
2095 /* no sense, TUR either succeeded or failed
2096 * with a status error */
2097 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2098 sd_print_result(sdkp
, "Test Unit Ready failed",
2105 * The device does not want the automatic start to be issued.
2107 if (sdkp
->device
->no_start_on_add
)
2110 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2111 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2112 break; /* manual intervention required */
2113 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2114 break; /* standby */
2115 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2116 break; /* unavailable */
2118 * Issue command to spin up drive when not ready
2121 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2122 cmd
[0] = START_STOP
;
2123 cmd
[1] = 1; /* Return immediately */
2124 memset((void *) &cmd
[2], 0, 8);
2125 cmd
[4] = 1; /* Start spin cycle */
2126 if (sdkp
->device
->start_stop_pwr_cond
)
2128 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2130 SD_TIMEOUT
, SD_MAX_RETRIES
,
2132 spintime_expire
= jiffies
+ 100 * HZ
;
2135 /* Wait 1 second for next try */
2140 * Wait for USB flash devices with slow firmware.
2141 * Yes, this sense key/ASC combination shouldn't
2142 * occur here. It's characteristic of these devices.
2144 } else if (sense_valid
&&
2145 sshdr
.sense_key
== UNIT_ATTENTION
&&
2146 sshdr
.asc
== 0x28) {
2148 spintime_expire
= jiffies
+ 5 * HZ
;
2151 /* Wait 1 second for next try */
2154 /* we don't understand the sense code, so it's
2155 * probably pointless to loop */
2157 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2158 sd_print_sense_hdr(sdkp
, &sshdr
);
2163 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2166 if (scsi_status_is_good(the_result
))
2169 printk("not responding...\n");
2174 * Determine whether disk supports Data Integrity Field.
2176 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2178 struct scsi_device
*sdp
= sdkp
->device
;
2182 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2185 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2187 if (type
> T10_PI_TYPE3_PROTECTION
)
2189 else if (scsi_host_dif_capable(sdp
->host
, type
))
2192 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2195 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2196 " protection type %u. Disabling disk!\n",
2200 sd_printk(KERN_NOTICE
, sdkp
,
2201 "Enabling DIF Type %u protection\n", type
);
2204 sd_printk(KERN_NOTICE
, sdkp
,
2205 "Disabling DIF Type %u protection\n", type
);
2209 sdkp
->protection_type
= type
;
2214 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2215 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2218 if (driver_byte(the_result
) & DRIVER_SENSE
)
2219 sd_print_sense_hdr(sdkp
, sshdr
);
2221 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2224 * Set dirty bit for removable devices if not ready -
2225 * sometimes drives will not report this properly.
2227 if (sdp
->removable
&&
2228 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2229 set_media_not_present(sdkp
);
2232 * We used to set media_present to 0 here to indicate no media
2233 * in the drive, but some drives fail read capacity even with
2234 * media present, so we can't do that.
2236 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2240 #if RC16_LEN > SD_BUF_SIZE
2241 #error RC16_LEN must not be more than SD_BUF_SIZE
2244 #define READ_CAPACITY_RETRIES_ON_RESET 10
2247 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2248 * and the reported logical block size is bigger than 512 bytes. Note
2249 * that last_sector is a u64 and therefore logical_to_sectors() is not
2252 static bool sd_addressable_capacity(u64 lba
, unsigned int sector_size
)
2254 u64 last_sector
= (lba
+ 1ULL) << (ilog2(sector_size
) - 9);
2256 if (sizeof(sector_t
) == 4 && last_sector
> U32_MAX
)
2262 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2263 unsigned char *buffer
)
2265 unsigned char cmd
[16];
2266 struct scsi_sense_hdr sshdr
;
2267 int sense_valid
= 0;
2269 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2270 unsigned int alignment
;
2271 unsigned long long lba
;
2272 unsigned sector_size
;
2274 if (sdp
->no_read_capacity_16
)
2279 cmd
[0] = SERVICE_ACTION_IN_16
;
2280 cmd
[1] = SAI_READ_CAPACITY_16
;
2282 memset(buffer
, 0, RC16_LEN
);
2284 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2285 buffer
, RC16_LEN
, &sshdr
,
2286 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2288 if (media_not_present(sdkp
, &sshdr
))
2292 sense_valid
= scsi_sense_valid(&sshdr
);
2294 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2295 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2297 /* Invalid Command Operation Code or
2298 * Invalid Field in CDB, just retry
2299 * silently with RC10 */
2302 sshdr
.sense_key
== UNIT_ATTENTION
&&
2303 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2304 /* Device reset might occur several times,
2305 * give it one more chance */
2306 if (--reset_retries
> 0)
2311 } while (the_result
&& retries
);
2314 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2315 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2319 sector_size
= get_unaligned_be32(&buffer
[8]);
2320 lba
= get_unaligned_be64(&buffer
[0]);
2322 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2327 if (!sd_addressable_capacity(lba
, sector_size
)) {
2328 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2329 "kernel compiled with support for large block "
2335 /* Logical blocks per physical block exponent */
2336 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2339 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2341 /* Lowest aligned logical block */
2342 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2343 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2344 if (alignment
&& sdkp
->first_scan
)
2345 sd_printk(KERN_NOTICE
, sdkp
,
2346 "physical block alignment offset: %u\n", alignment
);
2348 if (buffer
[14] & 0x80) { /* LBPME */
2351 if (buffer
[14] & 0x40) /* LBPRZ */
2354 sd_config_discard(sdkp
, SD_LBP_WS16
);
2357 sdkp
->capacity
= lba
+ 1;
2361 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2362 unsigned char *buffer
)
2364 unsigned char cmd
[16];
2365 struct scsi_sense_hdr sshdr
;
2366 int sense_valid
= 0;
2368 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2370 unsigned sector_size
;
2373 cmd
[0] = READ_CAPACITY
;
2374 memset(&cmd
[1], 0, 9);
2375 memset(buffer
, 0, 8);
2377 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2379 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2381 if (media_not_present(sdkp
, &sshdr
))
2385 sense_valid
= scsi_sense_valid(&sshdr
);
2387 sshdr
.sense_key
== UNIT_ATTENTION
&&
2388 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2389 /* Device reset might occur several times,
2390 * give it one more chance */
2391 if (--reset_retries
> 0)
2396 } while (the_result
&& retries
);
2399 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2400 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2404 sector_size
= get_unaligned_be32(&buffer
[4]);
2405 lba
= get_unaligned_be32(&buffer
[0]);
2407 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2408 /* Some buggy (usb cardreader) devices return an lba of
2409 0xffffffff when the want to report a size of 0 (with
2410 which they really mean no media is present) */
2412 sdkp
->physical_block_size
= sector_size
;
2416 if (!sd_addressable_capacity(lba
, sector_size
)) {
2417 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2418 "kernel compiled with support for large block "
2424 sdkp
->capacity
= lba
+ 1;
2425 sdkp
->physical_block_size
= sector_size
;
2429 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2431 if (sdp
->host
->max_cmd_len
< 16)
2433 if (sdp
->try_rc_10_first
)
2435 if (sdp
->scsi_level
> SCSI_SPC_2
)
2437 if (scsi_device_protection(sdp
))
2443 * read disk capacity
2446 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2449 struct scsi_device
*sdp
= sdkp
->device
;
2451 if (sd_try_rc16_first(sdp
)) {
2452 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2453 if (sector_size
== -EOVERFLOW
)
2455 if (sector_size
== -ENODEV
)
2457 if (sector_size
< 0)
2458 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2459 if (sector_size
< 0)
2462 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2463 if (sector_size
== -EOVERFLOW
)
2465 if (sector_size
< 0)
2467 if ((sizeof(sdkp
->capacity
) > 4) &&
2468 (sdkp
->capacity
> 0xffffffffULL
)) {
2469 int old_sector_size
= sector_size
;
2470 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2471 "Trying to use READ CAPACITY(16).\n");
2472 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2473 if (sector_size
< 0) {
2474 sd_printk(KERN_NOTICE
, sdkp
,
2475 "Using 0xffffffff as device size\n");
2476 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2477 sector_size
= old_sector_size
;
2483 /* Some devices are known to return the total number of blocks,
2484 * not the highest block number. Some devices have versions
2485 * which do this and others which do not. Some devices we might
2486 * suspect of doing this but we don't know for certain.
2488 * If we know the reported capacity is wrong, decrement it. If
2489 * we can only guess, then assume the number of blocks is even
2490 * (usually true but not always) and err on the side of lowering
2493 if (sdp
->fix_capacity
||
2494 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2495 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2496 "from its reported value: %llu\n",
2497 (unsigned long long) sdkp
->capacity
);
2502 if (sector_size
== 0) {
2504 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2508 if (sector_size
!= 512 &&
2509 sector_size
!= 1024 &&
2510 sector_size
!= 2048 &&
2511 sector_size
!= 4096) {
2512 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2515 * The user might want to re-format the drive with
2516 * a supported sectorsize. Once this happens, it
2517 * would be relatively trivial to set the thing up.
2518 * For this reason, we leave the thing in the table.
2522 * set a bogus sector size so the normal read/write
2523 * logic in the block layer will eventually refuse any
2524 * request on this device without tripping over power
2525 * of two sector size assumptions
2529 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2530 blk_queue_physical_block_size(sdp
->request_queue
,
2531 sdkp
->physical_block_size
);
2532 sdkp
->device
->sector_size
= sector_size
;
2534 if (sdkp
->capacity
> 0xffffffff)
2535 sdp
->use_16_for_rw
= 1;
2540 * Print disk capacity
2543 sd_print_capacity(struct scsi_disk
*sdkp
,
2544 sector_t old_capacity
)
2546 int sector_size
= sdkp
->device
->sector_size
;
2547 char cap_str_2
[10], cap_str_10
[10];
2549 string_get_size(sdkp
->capacity
, sector_size
,
2550 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2551 string_get_size(sdkp
->capacity
, sector_size
,
2552 STRING_UNITS_10
, cap_str_10
,
2553 sizeof(cap_str_10
));
2555 if (sdkp
->first_scan
|| old_capacity
!= sdkp
->capacity
) {
2556 sd_printk(KERN_NOTICE
, sdkp
,
2557 "%llu %d-byte logical blocks: (%s/%s)\n",
2558 (unsigned long long)sdkp
->capacity
,
2559 sector_size
, cap_str_10
, cap_str_2
);
2561 if (sdkp
->physical_block_size
!= sector_size
)
2562 sd_printk(KERN_NOTICE
, sdkp
,
2563 "%u-byte physical blocks\n",
2564 sdkp
->physical_block_size
);
2566 sd_zbc_print_zones(sdkp
);
2570 /* called with buffer of length 512 */
2572 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2573 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2574 struct scsi_sense_hdr
*sshdr
)
2576 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2577 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2582 * read write protect setting, if possible - called only in sd_revalidate_disk()
2583 * called with buffer of length SD_BUF_SIZE
2586 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2589 struct scsi_device
*sdp
= sdkp
->device
;
2590 struct scsi_mode_data data
;
2591 int old_wp
= sdkp
->write_prot
;
2593 set_disk_ro(sdkp
->disk
, 0);
2594 if (sdp
->skip_ms_page_3f
) {
2595 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2599 if (sdp
->use_192_bytes_for_3f
) {
2600 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2603 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2604 * We have to start carefully: some devices hang if we ask
2605 * for more than is available.
2607 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2610 * Second attempt: ask for page 0 When only page 0 is
2611 * implemented, a request for page 3F may return Sense Key
2612 * 5: Illegal Request, Sense Code 24: Invalid field in
2615 if (!scsi_status_is_good(res
))
2616 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2619 * Third attempt: ask 255 bytes, as we did earlier.
2621 if (!scsi_status_is_good(res
))
2622 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2626 if (!scsi_status_is_good(res
)) {
2627 sd_first_printk(KERN_WARNING
, sdkp
,
2628 "Test WP failed, assume Write Enabled\n");
2630 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2631 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2632 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2633 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2634 sdkp
->write_prot
? "on" : "off");
2635 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2641 * sd_read_cache_type - called only from sd_revalidate_disk()
2642 * called with buffer of length SD_BUF_SIZE
2645 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2648 struct scsi_device
*sdp
= sdkp
->device
;
2653 struct scsi_mode_data data
;
2654 struct scsi_sense_hdr sshdr
;
2655 int old_wce
= sdkp
->WCE
;
2656 int old_rcd
= sdkp
->RCD
;
2657 int old_dpofua
= sdkp
->DPOFUA
;
2660 if (sdkp
->cache_override
)
2664 if (sdp
->skip_ms_page_8
) {
2665 if (sdp
->type
== TYPE_RBC
)
2668 if (sdp
->skip_ms_page_3f
)
2671 if (sdp
->use_192_bytes_for_3f
)
2675 } else if (sdp
->type
== TYPE_RBC
) {
2683 /* cautiously ask */
2684 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2687 if (!scsi_status_is_good(res
))
2690 if (!data
.header_length
) {
2693 sd_first_printk(KERN_ERR
, sdkp
,
2694 "Missing header in MODE_SENSE response\n");
2697 /* that went OK, now ask for the proper length */
2701 * We're only interested in the first three bytes, actually.
2702 * But the data cache page is defined for the first 20.
2706 else if (len
> SD_BUF_SIZE
) {
2707 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2708 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2711 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2715 if (len
> first_len
)
2716 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2719 if (scsi_status_is_good(res
)) {
2720 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2722 while (offset
< len
) {
2723 u8 page_code
= buffer
[offset
] & 0x3F;
2724 u8 spf
= buffer
[offset
] & 0x40;
2726 if (page_code
== 8 || page_code
== 6) {
2727 /* We're interested only in the first 3 bytes.
2729 if (len
- offset
<= 2) {
2730 sd_first_printk(KERN_ERR
, sdkp
,
2731 "Incomplete mode parameter "
2735 modepage
= page_code
;
2739 /* Go to the next page */
2740 if (spf
&& len
- offset
> 3)
2741 offset
+= 4 + (buffer
[offset
+2] << 8) +
2743 else if (!spf
&& len
- offset
> 1)
2744 offset
+= 2 + buffer
[offset
+1];
2746 sd_first_printk(KERN_ERR
, sdkp
,
2748 "parameter data\n");
2754 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2758 if (modepage
== 8) {
2759 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2760 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2762 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2766 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2767 if (sdp
->broken_fua
) {
2768 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2770 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2771 !sdkp
->device
->use_16_for_rw
) {
2772 sd_first_printk(KERN_NOTICE
, sdkp
,
2773 "Uses READ/WRITE(6), disabling FUA\n");
2777 /* No cache flush allowed for write protected devices */
2778 if (sdkp
->WCE
&& sdkp
->write_prot
)
2781 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2782 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2783 sd_printk(KERN_NOTICE
, sdkp
,
2784 "Write cache: %s, read cache: %s, %s\n",
2785 sdkp
->WCE
? "enabled" : "disabled",
2786 sdkp
->RCD
? "disabled" : "enabled",
2787 sdkp
->DPOFUA
? "supports DPO and FUA"
2788 : "doesn't support DPO or FUA");
2794 if (scsi_sense_valid(&sshdr
) &&
2795 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2796 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2797 /* Invalid field in CDB */
2798 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2800 sd_first_printk(KERN_ERR
, sdkp
,
2801 "Asking for cache data failed\n");
2804 if (sdp
->wce_default_on
) {
2805 sd_first_printk(KERN_NOTICE
, sdkp
,
2806 "Assuming drive cache: write back\n");
2809 sd_first_printk(KERN_ERR
, sdkp
,
2810 "Assuming drive cache: write through\n");
2818 * The ATO bit indicates whether the DIF application tag is available
2819 * for use by the operating system.
2821 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2824 struct scsi_device
*sdp
= sdkp
->device
;
2825 struct scsi_mode_data data
;
2826 struct scsi_sense_hdr sshdr
;
2828 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2831 if (sdkp
->protection_type
== 0)
2834 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2835 SD_MAX_RETRIES
, &data
, &sshdr
);
2837 if (!scsi_status_is_good(res
) || !data
.header_length
||
2839 sd_first_printk(KERN_WARNING
, sdkp
,
2840 "getting Control mode page failed, assume no ATO\n");
2842 if (scsi_sense_valid(&sshdr
))
2843 sd_print_sense_hdr(sdkp
, &sshdr
);
2848 offset
= data
.header_length
+ data
.block_descriptor_length
;
2850 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2851 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2855 if ((buffer
[offset
+ 5] & 0x80) == 0)
2864 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2865 * @sdkp: disk to query
2867 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2869 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2870 const int vpd_len
= 64;
2871 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2874 /* Block Limits VPD */
2875 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2878 blk_queue_io_min(sdkp
->disk
->queue
,
2879 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2881 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2882 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2884 if (buffer
[3] == 0x3c) {
2885 unsigned int lba_count
, desc_count
;
2887 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2892 lba_count
= get_unaligned_be32(&buffer
[20]);
2893 desc_count
= get_unaligned_be32(&buffer
[24]);
2895 if (lba_count
&& desc_count
)
2896 sdkp
->max_unmap_blocks
= lba_count
;
2898 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2900 if (buffer
[32] & 0x80)
2901 sdkp
->unmap_alignment
=
2902 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2904 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2906 if (sdkp
->max_unmap_blocks
)
2907 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2909 sd_config_discard(sdkp
, SD_LBP_WS16
);
2911 } else { /* LBP VPD page tells us what to use */
2912 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2913 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2914 else if (sdkp
->lbpws
)
2915 sd_config_discard(sdkp
, SD_LBP_WS16
);
2916 else if (sdkp
->lbpws10
)
2917 sd_config_discard(sdkp
, SD_LBP_WS10
);
2918 else if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2919 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2921 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2930 * sd_read_block_characteristics - Query block dev. characteristics
2931 * @sdkp: disk to query
2933 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2935 struct request_queue
*q
= sdkp
->disk
->queue
;
2936 unsigned char *buffer
;
2938 const int vpd_len
= 64;
2940 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2943 /* Block Device Characteristics VPD */
2944 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2947 rot
= get_unaligned_be16(&buffer
[4]);
2950 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
, q
);
2951 queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM
, q
);
2954 if (sdkp
->device
->type
== TYPE_ZBC
) {
2956 q
->limits
.zoned
= BLK_ZONED_HM
;
2958 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2959 if (sdkp
->zoned
== 1)
2961 q
->limits
.zoned
= BLK_ZONED_HA
;
2964 * Treat drive-managed devices as
2965 * regular block devices.
2967 q
->limits
.zoned
= BLK_ZONED_NONE
;
2969 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
2970 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
2971 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
2978 * sd_read_block_provisioning - Query provisioning VPD page
2979 * @sdkp: disk to query
2981 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
2983 unsigned char *buffer
;
2984 const int vpd_len
= 8;
2986 if (sdkp
->lbpme
== 0)
2989 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2991 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
2995 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
2996 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2997 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3003 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3005 struct scsi_device
*sdev
= sdkp
->device
;
3007 if (sdev
->host
->no_write_same
) {
3008 sdev
->no_write_same
= 1;
3013 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3014 /* too large values might cause issues with arcmsr */
3015 int vpd_buf_len
= 64;
3017 sdev
->no_report_opcodes
= 1;
3019 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3020 * CODES is unsupported and the device has an ATA
3021 * Information VPD page (SAT).
3023 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3024 sdev
->no_write_same
= 1;
3027 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3030 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3034 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3036 struct scsi_device
*sdev
= sdkp
->device
;
3038 if (!sdev
->security_supported
)
3041 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3042 SECURITY_PROTOCOL_IN
) == 1 &&
3043 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3044 SECURITY_PROTOCOL_OUT
) == 1)
3049 * sd_revalidate_disk - called the first time a new disk is seen,
3050 * performs disk spin up, read_capacity, etc.
3051 * @disk: struct gendisk we care about
3053 static int sd_revalidate_disk(struct gendisk
*disk
)
3055 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3056 struct scsi_device
*sdp
= sdkp
->device
;
3057 struct request_queue
*q
= sdkp
->disk
->queue
;
3058 sector_t old_capacity
= sdkp
->capacity
;
3059 unsigned char *buffer
;
3060 unsigned int dev_max
, rw_max
;
3062 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3063 "sd_revalidate_disk\n"));
3066 * If the device is offline, don't try and read capacity or any
3067 * of the other niceties.
3069 if (!scsi_device_online(sdp
))
3072 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3074 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3075 "allocation failure.\n");
3079 sd_spinup_disk(sdkp
);
3082 * Without media there is no reason to ask; moreover, some devices
3083 * react badly if we do.
3085 if (sdkp
->media_present
) {
3086 sd_read_capacity(sdkp
, buffer
);
3088 if (scsi_device_supports_vpd(sdp
)) {
3089 sd_read_block_provisioning(sdkp
);
3090 sd_read_block_limits(sdkp
);
3091 sd_read_block_characteristics(sdkp
);
3092 sd_zbc_read_zones(sdkp
, buffer
);
3095 sd_print_capacity(sdkp
, old_capacity
);
3097 sd_read_write_protect_flag(sdkp
, buffer
);
3098 sd_read_cache_type(sdkp
, buffer
);
3099 sd_read_app_tag_own(sdkp
, buffer
);
3100 sd_read_write_same(sdkp
, buffer
);
3101 sd_read_security(sdkp
, buffer
);
3104 sdkp
->first_scan
= 0;
3107 * We now have all cache related info, determine how we deal
3108 * with flush requests.
3110 sd_set_flush_flag(sdkp
);
3112 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3113 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3115 /* Some devices report a maximum block count for READ/WRITE requests. */
3116 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3117 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3120 * Use the device's preferred I/O size for reads and writes
3121 * unless the reported value is unreasonably small, large, or
3124 if (sdkp
->opt_xfer_blocks
&&
3125 sdkp
->opt_xfer_blocks
<= dev_max
&&
3126 sdkp
->opt_xfer_blocks
<= SD_DEF_XFER_BLOCKS
&&
3127 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
) >= PAGE_SIZE
) {
3128 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3129 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3131 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3132 (sector_t
)BLK_DEF_MAX_SECTORS
);
3134 /* Combine with controller limits */
3135 q
->limits
.max_sectors
= min(rw_max
, queue_max_hw_sectors(q
));
3137 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3138 sd_config_write_same(sdkp
);
3146 * sd_unlock_native_capacity - unlock native capacity
3147 * @disk: struct gendisk to set capacity for
3149 * Block layer calls this function if it detects that partitions
3150 * on @disk reach beyond the end of the device. If the SCSI host
3151 * implements ->unlock_native_capacity() method, it's invoked to
3152 * give it a chance to adjust the device capacity.
3155 * Defined by block layer. Might sleep.
3157 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3159 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3161 if (sdev
->host
->hostt
->unlock_native_capacity
)
3162 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3166 * sd_format_disk_name - format disk name
3167 * @prefix: name prefix - ie. "sd" for SCSI disks
3168 * @index: index of the disk to format name for
3169 * @buf: output buffer
3170 * @buflen: length of the output buffer
3172 * SCSI disk names starts at sda. The 26th device is sdz and the
3173 * 27th is sdaa. The last one for two lettered suffix is sdzz
3174 * which is followed by sdaaa.
3176 * This is basically 26 base counting with one extra 'nil' entry
3177 * at the beginning from the second digit on and can be
3178 * determined using similar method as 26 base conversion with the
3179 * index shifted -1 after each digit is computed.
3185 * 0 on success, -errno on failure.
3187 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3189 const int base
= 'z' - 'a' + 1;
3190 char *begin
= buf
+ strlen(prefix
);
3191 char *end
= buf
+ buflen
;
3201 *--p
= 'a' + (index
% unit
);
3202 index
= (index
/ unit
) - 1;
3203 } while (index
>= 0);
3205 memmove(begin
, p
, end
- p
);
3206 memcpy(buf
, prefix
, strlen(prefix
));
3212 * The asynchronous part of sd_probe
3214 static void sd_probe_async(void *data
, async_cookie_t cookie
)
3216 struct scsi_disk
*sdkp
= data
;
3217 struct scsi_device
*sdp
;
3224 index
= sdkp
->index
;
3225 dev
= &sdp
->sdev_gendev
;
3227 gd
->major
= sd_major((index
& 0xf0) >> 4);
3228 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3229 gd
->minors
= SD_MINORS
;
3231 gd
->fops
= &sd_fops
;
3232 gd
->private_data
= &sdkp
->driver
;
3233 gd
->queue
= sdkp
->device
->request_queue
;
3235 /* defaults, until the device tells us otherwise */
3236 sdp
->sector_size
= 512;
3238 sdkp
->media_present
= 1;
3239 sdkp
->write_prot
= 0;
3240 sdkp
->cache_override
= 0;
3244 sdkp
->first_scan
= 1;
3245 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3247 sd_revalidate_disk(gd
);
3249 gd
->flags
= GENHD_FL_EXT_DEVT
;
3250 if (sdp
->removable
) {
3251 gd
->flags
|= GENHD_FL_REMOVABLE
;
3252 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3255 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3256 device_add_disk(dev
, gd
);
3258 sd_dif_config_host(sdkp
);
3260 sd_revalidate_disk(gd
);
3262 if (sdkp
->security
) {
3263 sdkp
->opal_dev
= init_opal_dev(sdp
, &sd_sec_submit
);
3265 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3268 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3269 sdp
->removable
? "removable " : "");
3270 scsi_autopm_put_device(sdp
);
3271 put_device(&sdkp
->dev
);
3275 * sd_probe - called during driver initialization and whenever a
3276 * new scsi device is attached to the system. It is called once
3277 * for each scsi device (not just disks) present.
3278 * @dev: pointer to device object
3280 * Returns 0 if successful (or not interested in this scsi device
3281 * (e.g. scanner)); 1 when there is an error.
3283 * Note: this function is invoked from the scsi mid-level.
3284 * This function sets up the mapping between a given
3285 * <host,channel,id,lun> (found in sdp) and new device name
3286 * (e.g. /dev/sda). More precisely it is the block device major
3287 * and minor number that is chosen here.
3289 * Assume sd_probe is not re-entrant (for time being)
3290 * Also think about sd_probe() and sd_remove() running coincidentally.
3292 static int sd_probe(struct device
*dev
)
3294 struct scsi_device
*sdp
= to_scsi_device(dev
);
3295 struct scsi_disk
*sdkp
;
3300 scsi_autopm_get_device(sdp
);
3302 if (sdp
->type
!= TYPE_DISK
&&
3303 sdp
->type
!= TYPE_ZBC
&&
3304 sdp
->type
!= TYPE_MOD
&&
3305 sdp
->type
!= TYPE_RBC
)
3308 #ifndef CONFIG_BLK_DEV_ZONED
3309 if (sdp
->type
== TYPE_ZBC
)
3312 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3316 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3320 gd
= alloc_disk(SD_MINORS
);
3325 if (!ida_pre_get(&sd_index_ida
, GFP_KERNEL
))
3328 spin_lock(&sd_index_lock
);
3329 error
= ida_get_new(&sd_index_ida
, &index
);
3330 spin_unlock(&sd_index_lock
);
3331 } while (error
== -EAGAIN
);
3334 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3338 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3340 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3341 goto out_free_index
;
3345 sdkp
->driver
= &sd_template
;
3347 sdkp
->index
= index
;
3348 atomic_set(&sdkp
->openers
, 0);
3349 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3351 if (!sdp
->request_queue
->rq_timeout
) {
3352 if (sdp
->type
!= TYPE_MOD
)
3353 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3355 blk_queue_rq_timeout(sdp
->request_queue
,
3359 device_initialize(&sdkp
->dev
);
3360 sdkp
->dev
.parent
= dev
;
3361 sdkp
->dev
.class = &sd_disk_class
;
3362 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3364 error
= device_add(&sdkp
->dev
);
3366 goto out_free_index
;
3369 dev_set_drvdata(dev
, sdkp
);
3371 get_device(&sdkp
->dev
); /* prevent release before async_schedule */
3372 async_schedule_domain(sd_probe_async
, sdkp
, &scsi_sd_probe_domain
);
3377 spin_lock(&sd_index_lock
);
3378 ida_remove(&sd_index_ida
, index
);
3379 spin_unlock(&sd_index_lock
);
3385 scsi_autopm_put_device(sdp
);
3390 * sd_remove - called whenever a scsi disk (previously recognized by
3391 * sd_probe) is detached from the system. It is called (potentially
3392 * multiple times) during sd module unload.
3393 * @dev: pointer to device object
3395 * Note: this function is invoked from the scsi mid-level.
3396 * This function potentially frees up a device name (e.g. /dev/sdc)
3397 * that could be re-used by a subsequent sd_probe().
3398 * This function is not called when the built-in sd driver is "exit-ed".
3400 static int sd_remove(struct device
*dev
)
3402 struct scsi_disk
*sdkp
;
3405 sdkp
= dev_get_drvdata(dev
);
3406 devt
= disk_devt(sdkp
->disk
);
3407 scsi_autopm_get_device(sdkp
->device
);
3409 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3410 async_synchronize_full_domain(&scsi_sd_probe_domain
);
3411 device_del(&sdkp
->dev
);
3412 del_gendisk(sdkp
->disk
);
3415 sd_zbc_remove(sdkp
);
3417 free_opal_dev(sdkp
->opal_dev
);
3419 blk_register_region(devt
, SD_MINORS
, NULL
,
3420 sd_default_probe
, NULL
, NULL
);
3422 mutex_lock(&sd_ref_mutex
);
3423 dev_set_drvdata(dev
, NULL
);
3424 put_device(&sdkp
->dev
);
3425 mutex_unlock(&sd_ref_mutex
);
3431 * scsi_disk_release - Called to free the scsi_disk structure
3432 * @dev: pointer to embedded class device
3434 * sd_ref_mutex must be held entering this routine. Because it is
3435 * called on last put, you should always use the scsi_disk_get()
3436 * scsi_disk_put() helpers which manipulate the semaphore directly
3437 * and never do a direct put_device.
3439 static void scsi_disk_release(struct device
*dev
)
3441 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3442 struct gendisk
*disk
= sdkp
->disk
;
3444 spin_lock(&sd_index_lock
);
3445 ida_remove(&sd_index_ida
, sdkp
->index
);
3446 spin_unlock(&sd_index_lock
);
3448 disk
->private_data
= NULL
;
3450 put_device(&sdkp
->device
->sdev_gendev
);
3455 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3457 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3458 struct scsi_sense_hdr sshdr
;
3459 struct scsi_device
*sdp
= sdkp
->device
;
3463 cmd
[4] |= 1; /* START */
3465 if (sdp
->start_stop_pwr_cond
)
3466 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3468 if (!scsi_device_online(sdp
))
3471 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3472 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3474 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3475 if (driver_byte(res
) & DRIVER_SENSE
)
3476 sd_print_sense_hdr(sdkp
, &sshdr
);
3477 if (scsi_sense_valid(&sshdr
) &&
3478 /* 0x3a is medium not present */
3483 /* SCSI error codes must not go to the generic layer */
3491 * Send a SYNCHRONIZE CACHE instruction down to the device through
3492 * the normal SCSI command structure. Wait for the command to
3495 static void sd_shutdown(struct device
*dev
)
3497 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3500 return; /* this can happen */
3502 if (pm_runtime_suspended(dev
))
3505 if (sdkp
->WCE
&& sdkp
->media_present
) {
3506 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3507 sd_sync_cache(sdkp
, NULL
);
3510 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3511 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3512 sd_start_stop_device(sdkp
, 0);
3516 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3518 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3519 struct scsi_sense_hdr sshdr
;
3522 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3525 if (sdkp
->WCE
&& sdkp
->media_present
) {
3526 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3527 ret
= sd_sync_cache(sdkp
, &sshdr
);
3530 /* ignore OFFLINE device */
3534 if (!scsi_sense_valid(&sshdr
) ||
3535 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3539 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3540 * doesn't support sync. There's not much to do and
3541 * suspend shouldn't fail.
3547 if (sdkp
->device
->manage_start_stop
) {
3548 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3549 /* an error is not worth aborting a system sleep */
3550 ret
= sd_start_stop_device(sdkp
, 0);
3551 if (ignore_stop_errors
)
3558 static int sd_suspend_system(struct device
*dev
)
3560 return sd_suspend_common(dev
, true);
3563 static int sd_suspend_runtime(struct device
*dev
)
3565 return sd_suspend_common(dev
, false);
3568 static int sd_resume(struct device
*dev
)
3570 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3573 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3576 if (!sdkp
->device
->manage_start_stop
)
3579 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3580 ret
= sd_start_stop_device(sdkp
, 1);
3582 opal_unlock_from_suspend(sdkp
->opal_dev
);
3587 * init_sd - entry point for this driver (both when built in or when
3590 * Note: this function registers this driver with the scsi mid-level.
3592 static int __init
init_sd(void)
3594 int majors
= 0, i
, err
;
3596 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3598 for (i
= 0; i
< SD_MAJORS
; i
++) {
3599 if (register_blkdev(sd_major(i
), "sd") != 0)
3602 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3603 sd_default_probe
, NULL
, NULL
);
3609 err
= class_register(&sd_disk_class
);
3613 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3615 if (!sd_cdb_cache
) {
3616 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3621 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3623 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3628 err
= scsi_register_driver(&sd_template
.gendrv
);
3630 goto err_out_driver
;
3635 mempool_destroy(sd_cdb_pool
);
3638 kmem_cache_destroy(sd_cdb_cache
);
3641 class_unregister(&sd_disk_class
);
3643 for (i
= 0; i
< SD_MAJORS
; i
++)
3644 unregister_blkdev(sd_major(i
), "sd");
3649 * exit_sd - exit point for this driver (when it is a module).
3651 * Note: this function unregisters this driver from the scsi mid-level.
3653 static void __exit
exit_sd(void)
3657 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3659 scsi_unregister_driver(&sd_template
.gendrv
);
3660 mempool_destroy(sd_cdb_pool
);
3661 kmem_cache_destroy(sd_cdb_cache
);
3663 class_unregister(&sd_disk_class
);
3665 for (i
= 0; i
< SD_MAJORS
; i
++) {
3666 blk_unregister_region(sd_major(i
), SD_MINORS
);
3667 unregister_blkdev(sd_major(i
), "sd");
3671 module_init(init_sd
);
3672 module_exit(exit_sd
);
3674 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3675 struct scsi_sense_hdr
*sshdr
)
3677 scsi_print_sense_hdr(sdkp
->device
,
3678 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3681 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3684 const char *hb_string
= scsi_hostbyte_string(result
);
3685 const char *db_string
= scsi_driverbyte_string(result
);
3687 if (hb_string
|| db_string
)
3688 sd_printk(KERN_INFO
, sdkp
,
3689 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3690 hb_string
? hb_string
: "invalid",
3691 db_string
? db_string
: "invalid");
3693 sd_printk(KERN_INFO
, sdkp
,
3694 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3695 msg
, host_byte(result
), driver_byte(result
));