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
<= 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 if (sdkp
->device
->unmap_limit_for_ws
)
719 max_blocks
= sdkp
->max_unmap_blocks
;
721 max_blocks
= sdkp
->max_ws_blocks
;
723 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
727 if (sdkp
->device
->unmap_limit_for_ws
)
728 max_blocks
= sdkp
->max_unmap_blocks
;
730 max_blocks
= sdkp
->max_ws_blocks
;
732 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
736 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
737 (u32
)SD_MAX_WS10_BLOCKS
);
741 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
742 queue_flag_set_unlocked(QUEUE_FLAG_DISCARD
, q
);
745 static int sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
747 struct scsi_device
*sdp
= cmd
->device
;
748 struct request
*rq
= cmd
->request
;
749 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
750 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
751 unsigned int data_len
= 24;
754 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
755 if (!rq
->special_vec
.bv_page
)
756 return BLKPREP_DEFER
;
757 rq
->special_vec
.bv_offset
= 0;
758 rq
->special_vec
.bv_len
= data_len
;
759 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
762 cmd
->cmnd
[0] = UNMAP
;
765 buf
= page_address(rq
->special_vec
.bv_page
);
766 put_unaligned_be16(6 + 16, &buf
[0]);
767 put_unaligned_be16(16, &buf
[2]);
768 put_unaligned_be64(sector
, &buf
[8]);
769 put_unaligned_be32(nr_sectors
, &buf
[16]);
771 cmd
->allowed
= SD_MAX_RETRIES
;
772 cmd
->transfersize
= data_len
;
773 rq
->timeout
= SD_TIMEOUT
;
774 scsi_req(rq
)->resid_len
= data_len
;
776 return scsi_init_io(cmd
);
779 static int sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
781 struct scsi_device
*sdp
= cmd
->device
;
782 struct request
*rq
= cmd
->request
;
783 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
784 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
785 u32 data_len
= sdp
->sector_size
;
787 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
788 if (!rq
->special_vec
.bv_page
)
789 return BLKPREP_DEFER
;
790 rq
->special_vec
.bv_offset
= 0;
791 rq
->special_vec
.bv_len
= data_len
;
792 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
795 cmd
->cmnd
[0] = WRITE_SAME_16
;
797 cmd
->cmnd
[1] = 0x8; /* UNMAP */
798 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
799 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
801 cmd
->allowed
= SD_MAX_RETRIES
;
802 cmd
->transfersize
= data_len
;
803 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
804 scsi_req(rq
)->resid_len
= data_len
;
806 return scsi_init_io(cmd
);
809 static int sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
811 struct scsi_device
*sdp
= cmd
->device
;
812 struct request
*rq
= cmd
->request
;
813 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
814 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
815 u32 data_len
= sdp
->sector_size
;
817 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
818 if (!rq
->special_vec
.bv_page
)
819 return BLKPREP_DEFER
;
820 rq
->special_vec
.bv_offset
= 0;
821 rq
->special_vec
.bv_len
= data_len
;
822 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
825 cmd
->cmnd
[0] = WRITE_SAME
;
827 cmd
->cmnd
[1] = 0x8; /* UNMAP */
828 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
829 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
831 cmd
->allowed
= SD_MAX_RETRIES
;
832 cmd
->transfersize
= data_len
;
833 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
834 scsi_req(rq
)->resid_len
= data_len
;
836 return scsi_init_io(cmd
);
839 static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
841 struct request
*rq
= cmd
->request
;
842 struct scsi_device
*sdp
= cmd
->device
;
843 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
844 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
845 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
848 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
849 switch (sdkp
->zeroing_mode
) {
850 case SD_ZERO_WS16_UNMAP
:
851 ret
= sd_setup_write_same16_cmnd(cmd
, true);
853 case SD_ZERO_WS10_UNMAP
:
854 ret
= sd_setup_write_same10_cmnd(cmd
, true);
859 if (sdp
->no_write_same
)
860 return BLKPREP_INVALID
;
862 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff)
863 ret
= sd_setup_write_same16_cmnd(cmd
, false);
865 ret
= sd_setup_write_same10_cmnd(cmd
, false);
868 if (sd_is_zoned(sdkp
) && ret
== BLKPREP_OK
)
869 return sd_zbc_write_lock_zone(cmd
);
874 static void sd_config_write_same(struct scsi_disk
*sdkp
)
876 struct request_queue
*q
= sdkp
->disk
->queue
;
877 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
879 if (sdkp
->device
->no_write_same
) {
880 sdkp
->max_ws_blocks
= 0;
884 /* Some devices can not handle block counts above 0xffff despite
885 * supporting WRITE SAME(16). Consequently we default to 64k
886 * blocks per I/O unless the device explicitly advertises a
889 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
890 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
891 (u32
)SD_MAX_WS16_BLOCKS
);
892 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
893 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
894 (u32
)SD_MAX_WS10_BLOCKS
);
896 sdkp
->device
->no_write_same
= 1;
897 sdkp
->max_ws_blocks
= 0;
900 if (sdkp
->lbprz
&& sdkp
->lbpws
)
901 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
902 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
903 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
904 else if (sdkp
->max_ws_blocks
)
905 sdkp
->zeroing_mode
= SD_ZERO_WS
;
907 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
910 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
911 (logical_block_size
>> 9));
912 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
913 (logical_block_size
>> 9));
917 * sd_setup_write_same_cmnd - write the same data to multiple blocks
918 * @cmd: command to prepare
920 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
921 * the preference indicated by the target device.
923 static int sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
925 struct request
*rq
= cmd
->request
;
926 struct scsi_device
*sdp
= cmd
->device
;
927 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
928 struct bio
*bio
= rq
->bio
;
929 sector_t sector
= blk_rq_pos(rq
);
930 unsigned int nr_sectors
= blk_rq_sectors(rq
);
931 unsigned int nr_bytes
= blk_rq_bytes(rq
);
934 if (sdkp
->device
->no_write_same
)
935 return BLKPREP_INVALID
;
937 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
939 if (sd_is_zoned(sdkp
)) {
940 ret
= sd_zbc_write_lock_zone(cmd
);
941 if (ret
!= BLKPREP_OK
)
945 sector
>>= ilog2(sdp
->sector_size
) - 9;
946 nr_sectors
>>= ilog2(sdp
->sector_size
) - 9;
948 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
950 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff) {
952 cmd
->cmnd
[0] = WRITE_SAME_16
;
953 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
954 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
957 cmd
->cmnd
[0] = WRITE_SAME
;
958 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
959 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
962 cmd
->transfersize
= sdp
->sector_size
;
963 cmd
->allowed
= SD_MAX_RETRIES
;
966 * For WRITE SAME the data transferred via the DATA OUT buffer is
967 * different from the amount of data actually written to the target.
969 * We set up __data_len to the amount of data transferred via the
970 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
971 * to transfer a single sector of data first, but then reset it to
972 * the amount of data to be written right after so that the I/O path
973 * knows how much to actually write.
975 rq
->__data_len
= sdp
->sector_size
;
976 ret
= scsi_init_io(cmd
);
977 rq
->__data_len
= nr_bytes
;
979 if (sd_is_zoned(sdkp
) && ret
!= BLKPREP_OK
)
980 sd_zbc_write_unlock_zone(cmd
);
985 static int sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
987 struct request
*rq
= cmd
->request
;
989 /* flush requests don't perform I/O, zero the S/G table */
990 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
992 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
994 cmd
->transfersize
= 0;
995 cmd
->allowed
= SD_MAX_RETRIES
;
997 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1001 static int sd_setup_read_write_cmnd(struct scsi_cmnd
*SCpnt
)
1003 struct request
*rq
= SCpnt
->request
;
1004 struct scsi_device
*sdp
= SCpnt
->device
;
1005 struct gendisk
*disk
= rq
->rq_disk
;
1006 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1007 sector_t block
= blk_rq_pos(rq
);
1009 unsigned int this_count
= blk_rq_sectors(rq
);
1010 unsigned int dif
, dix
;
1011 bool zoned_write
= sd_is_zoned(sdkp
) && rq_data_dir(rq
) == WRITE
;
1013 unsigned char protect
;
1016 ret
= sd_zbc_write_lock_zone(SCpnt
);
1017 if (ret
!= BLKPREP_OK
)
1021 ret
= scsi_init_io(SCpnt
);
1022 if (ret
!= BLKPREP_OK
)
1024 WARN_ON_ONCE(SCpnt
!= rq
->special
);
1026 /* from here on until we're complete, any goto out
1027 * is used for a killable error condition */
1031 scmd_printk(KERN_INFO
, SCpnt
,
1032 "%s: block=%llu, count=%d\n",
1033 __func__
, (unsigned long long)block
, this_count
));
1035 if (!sdp
|| !scsi_device_online(sdp
) ||
1036 block
+ blk_rq_sectors(rq
) > get_capacity(disk
)) {
1037 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1038 "Finishing %u sectors\n",
1039 blk_rq_sectors(rq
)));
1040 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1041 "Retry with 0x%p\n", SCpnt
));
1047 * quietly refuse to do anything to a changed disc until
1048 * the changed bit has been reset
1050 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
1055 * Some SD card readers can't handle multi-sector accesses which touch
1056 * the last one or two hardware sectors. Split accesses as needed.
1058 threshold
= get_capacity(disk
) - SD_LAST_BUGGY_SECTORS
*
1059 (sdp
->sector_size
/ 512);
1061 if (unlikely(sdp
->last_sector_bug
&& block
+ this_count
> threshold
)) {
1062 if (block
< threshold
) {
1063 /* Access up to the threshold but not beyond */
1064 this_count
= threshold
- block
;
1066 /* Access only a single hardware sector */
1067 this_count
= sdp
->sector_size
/ 512;
1071 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
, "block=%llu\n",
1072 (unsigned long long)block
));
1075 * If we have a 1K hardware sectorsize, prevent access to single
1076 * 512 byte sectors. In theory we could handle this - in fact
1077 * the scsi cdrom driver must be able to handle this because
1078 * we typically use 1K blocksizes, and cdroms typically have
1079 * 2K hardware sectorsizes. Of course, things are simpler
1080 * with the cdrom, since it is read-only. For performance
1081 * reasons, the filesystems should be able to handle this
1082 * and not force the scsi disk driver to use bounce buffers
1085 if (sdp
->sector_size
== 1024) {
1086 if ((block
& 1) || (blk_rq_sectors(rq
) & 1)) {
1087 scmd_printk(KERN_ERR
, SCpnt
,
1088 "Bad block number requested\n");
1092 this_count
= this_count
>> 1;
1095 if (sdp
->sector_size
== 2048) {
1096 if ((block
& 3) || (blk_rq_sectors(rq
) & 3)) {
1097 scmd_printk(KERN_ERR
, SCpnt
,
1098 "Bad block number requested\n");
1102 this_count
= this_count
>> 2;
1105 if (sdp
->sector_size
== 4096) {
1106 if ((block
& 7) || (blk_rq_sectors(rq
) & 7)) {
1107 scmd_printk(KERN_ERR
, SCpnt
,
1108 "Bad block number requested\n");
1112 this_count
= this_count
>> 3;
1115 if (rq_data_dir(rq
) == WRITE
) {
1116 SCpnt
->cmnd
[0] = WRITE_6
;
1118 if (blk_integrity_rq(rq
))
1119 sd_dif_prepare(SCpnt
);
1121 } else if (rq_data_dir(rq
) == READ
) {
1122 SCpnt
->cmnd
[0] = READ_6
;
1124 scmd_printk(KERN_ERR
, SCpnt
, "Unknown command %d\n", req_op(rq
));
1128 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1129 "%s %d/%u 512 byte blocks.\n",
1130 (rq_data_dir(rq
) == WRITE
) ?
1131 "writing" : "reading", this_count
,
1132 blk_rq_sectors(rq
)));
1134 dix
= scsi_prot_sg_count(SCpnt
);
1135 dif
= scsi_host_dif_capable(SCpnt
->device
->host
, sdkp
->protection_type
);
1138 protect
= sd_setup_protect_cmnd(SCpnt
, dix
, dif
);
1142 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1143 SCpnt
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1145 if (unlikely(SCpnt
->cmnd
== NULL
)) {
1146 ret
= BLKPREP_DEFER
;
1150 SCpnt
->cmd_len
= SD_EXT_CDB_SIZE
;
1151 memset(SCpnt
->cmnd
, 0, SCpnt
->cmd_len
);
1152 SCpnt
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1153 SCpnt
->cmnd
[7] = 0x18;
1154 SCpnt
->cmnd
[9] = (rq_data_dir(rq
) == READ
) ? READ_32
: WRITE_32
;
1155 SCpnt
->cmnd
[10] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1158 SCpnt
->cmnd
[12] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1159 SCpnt
->cmnd
[13] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1160 SCpnt
->cmnd
[14] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1161 SCpnt
->cmnd
[15] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1162 SCpnt
->cmnd
[16] = (unsigned char) (block
>> 24) & 0xff;
1163 SCpnt
->cmnd
[17] = (unsigned char) (block
>> 16) & 0xff;
1164 SCpnt
->cmnd
[18] = (unsigned char) (block
>> 8) & 0xff;
1165 SCpnt
->cmnd
[19] = (unsigned char) block
& 0xff;
1167 /* Expected Indirect LBA */
1168 SCpnt
->cmnd
[20] = (unsigned char) (block
>> 24) & 0xff;
1169 SCpnt
->cmnd
[21] = (unsigned char) (block
>> 16) & 0xff;
1170 SCpnt
->cmnd
[22] = (unsigned char) (block
>> 8) & 0xff;
1171 SCpnt
->cmnd
[23] = (unsigned char) block
& 0xff;
1173 /* Transfer length */
1174 SCpnt
->cmnd
[28] = (unsigned char) (this_count
>> 24) & 0xff;
1175 SCpnt
->cmnd
[29] = (unsigned char) (this_count
>> 16) & 0xff;
1176 SCpnt
->cmnd
[30] = (unsigned char) (this_count
>> 8) & 0xff;
1177 SCpnt
->cmnd
[31] = (unsigned char) this_count
& 0xff;
1178 } else if (sdp
->use_16_for_rw
|| (this_count
> 0xffff)) {
1179 SCpnt
->cmnd
[0] += READ_16
- READ_6
;
1180 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1181 SCpnt
->cmnd
[2] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1182 SCpnt
->cmnd
[3] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1183 SCpnt
->cmnd
[4] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1184 SCpnt
->cmnd
[5] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1185 SCpnt
->cmnd
[6] = (unsigned char) (block
>> 24) & 0xff;
1186 SCpnt
->cmnd
[7] = (unsigned char) (block
>> 16) & 0xff;
1187 SCpnt
->cmnd
[8] = (unsigned char) (block
>> 8) & 0xff;
1188 SCpnt
->cmnd
[9] = (unsigned char) block
& 0xff;
1189 SCpnt
->cmnd
[10] = (unsigned char) (this_count
>> 24) & 0xff;
1190 SCpnt
->cmnd
[11] = (unsigned char) (this_count
>> 16) & 0xff;
1191 SCpnt
->cmnd
[12] = (unsigned char) (this_count
>> 8) & 0xff;
1192 SCpnt
->cmnd
[13] = (unsigned char) this_count
& 0xff;
1193 SCpnt
->cmnd
[14] = SCpnt
->cmnd
[15] = 0;
1194 } else if ((this_count
> 0xff) || (block
> 0x1fffff) ||
1195 scsi_device_protection(SCpnt
->device
) ||
1196 SCpnt
->device
->use_10_for_rw
) {
1197 SCpnt
->cmnd
[0] += READ_10
- READ_6
;
1198 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1199 SCpnt
->cmnd
[2] = (unsigned char) (block
>> 24) & 0xff;
1200 SCpnt
->cmnd
[3] = (unsigned char) (block
>> 16) & 0xff;
1201 SCpnt
->cmnd
[4] = (unsigned char) (block
>> 8) & 0xff;
1202 SCpnt
->cmnd
[5] = (unsigned char) block
& 0xff;
1203 SCpnt
->cmnd
[6] = SCpnt
->cmnd
[9] = 0;
1204 SCpnt
->cmnd
[7] = (unsigned char) (this_count
>> 8) & 0xff;
1205 SCpnt
->cmnd
[8] = (unsigned char) this_count
& 0xff;
1207 if (unlikely(rq
->cmd_flags
& REQ_FUA
)) {
1209 * This happens only if this drive failed
1210 * 10byte rw command with ILLEGAL_REQUEST
1211 * during operation and thus turned off
1214 scmd_printk(KERN_ERR
, SCpnt
,
1215 "FUA write on READ/WRITE(6) drive\n");
1219 SCpnt
->cmnd
[1] |= (unsigned char) ((block
>> 16) & 0x1f);
1220 SCpnt
->cmnd
[2] = (unsigned char) ((block
>> 8) & 0xff);
1221 SCpnt
->cmnd
[3] = (unsigned char) block
& 0xff;
1222 SCpnt
->cmnd
[4] = (unsigned char) this_count
;
1225 SCpnt
->sdb
.length
= this_count
* sdp
->sector_size
;
1228 * We shouldn't disconnect in the middle of a sector, so with a dumb
1229 * host adapter, it's safe to assume that we can at least transfer
1230 * this many bytes between each connect / disconnect.
1232 SCpnt
->transfersize
= sdp
->sector_size
;
1233 SCpnt
->underflow
= this_count
<< 9;
1234 SCpnt
->allowed
= SD_MAX_RETRIES
;
1237 * This indicates that the command is ready from our end to be
1242 if (zoned_write
&& ret
!= BLKPREP_OK
)
1243 sd_zbc_write_unlock_zone(SCpnt
);
1248 static int sd_init_command(struct scsi_cmnd
*cmd
)
1250 struct request
*rq
= cmd
->request
;
1252 switch (req_op(rq
)) {
1253 case REQ_OP_DISCARD
:
1254 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1256 return sd_setup_unmap_cmnd(cmd
);
1258 return sd_setup_write_same16_cmnd(cmd
, true);
1260 return sd_setup_write_same10_cmnd(cmd
, true);
1262 return sd_setup_write_same10_cmnd(cmd
, false);
1264 return BLKPREP_INVALID
;
1266 case REQ_OP_WRITE_ZEROES
:
1267 return sd_setup_write_zeroes_cmnd(cmd
);
1268 case REQ_OP_WRITE_SAME
:
1269 return sd_setup_write_same_cmnd(cmd
);
1271 return sd_setup_flush_cmnd(cmd
);
1274 return sd_setup_read_write_cmnd(cmd
);
1275 case REQ_OP_ZONE_REPORT
:
1276 return sd_zbc_setup_report_cmnd(cmd
);
1277 case REQ_OP_ZONE_RESET
:
1278 return sd_zbc_setup_reset_cmnd(cmd
);
1284 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1286 struct request
*rq
= SCpnt
->request
;
1288 if (SCpnt
->flags
& SCMD_ZONE_WRITE_LOCK
)
1289 sd_zbc_write_unlock_zone(SCpnt
);
1291 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1292 __free_page(rq
->special_vec
.bv_page
);
1294 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1295 mempool_free(SCpnt
->cmnd
, sd_cdb_pool
);
1302 * sd_open - open a scsi disk device
1303 * @bdev: Block device of the scsi disk to open
1304 * @mode: FMODE_* mask
1306 * Returns 0 if successful. Returns a negated errno value in case
1309 * Note: This can be called from a user context (e.g. fsck(1) )
1310 * or from within the kernel (e.g. as a result of a mount(1) ).
1311 * In the latter case @inode and @filp carry an abridged amount
1312 * of information as noted above.
1314 * Locking: called with bdev->bd_mutex held.
1316 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1318 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1319 struct scsi_device
*sdev
;
1325 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1327 sdev
= sdkp
->device
;
1330 * If the device is in error recovery, wait until it is done.
1331 * If the device is offline, then disallow any access to it.
1334 if (!scsi_block_when_processing_errors(sdev
))
1337 if (sdev
->removable
|| sdkp
->write_prot
)
1338 check_disk_change(bdev
);
1341 * If the drive is empty, just let the open fail.
1343 retval
= -ENOMEDIUM
;
1344 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1348 * If the device has the write protect tab set, have the open fail
1349 * if the user expects to be able to write to the thing.
1352 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1356 * It is possible that the disk changing stuff resulted in
1357 * the device being taken offline. If this is the case,
1358 * report this to the user, and don't pretend that the
1359 * open actually succeeded.
1362 if (!scsi_device_online(sdev
))
1365 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1366 if (scsi_block_when_processing_errors(sdev
))
1367 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1373 scsi_disk_put(sdkp
);
1378 * sd_release - invoked when the (last) close(2) is called on this
1380 * @disk: disk to release
1381 * @mode: FMODE_* mask
1385 * Note: may block (uninterruptible) if error recovery is underway
1388 * Locking: called with bdev->bd_mutex held.
1390 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1392 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1393 struct scsi_device
*sdev
= sdkp
->device
;
1395 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1397 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1398 if (scsi_block_when_processing_errors(sdev
))
1399 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1403 * XXX and what if there are packets in flight and this close()
1404 * XXX is followed by a "rmmod sd_mod"?
1407 scsi_disk_put(sdkp
);
1410 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1412 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1413 struct scsi_device
*sdp
= sdkp
->device
;
1414 struct Scsi_Host
*host
= sdp
->host
;
1415 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1418 /* default to most commonly used values */
1419 diskinfo
[0] = 0x40; /* 1 << 6 */
1420 diskinfo
[1] = 0x20; /* 1 << 5 */
1421 diskinfo
[2] = capacity
>> 11;
1423 /* override with calculated, extended default, or driver values */
1424 if (host
->hostt
->bios_param
)
1425 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1427 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1429 geo
->heads
= diskinfo
[0];
1430 geo
->sectors
= diskinfo
[1];
1431 geo
->cylinders
= diskinfo
[2];
1436 * sd_ioctl - process an ioctl
1437 * @bdev: target block device
1438 * @mode: FMODE_* mask
1439 * @cmd: ioctl command number
1440 * @arg: this is third argument given to ioctl(2) system call.
1441 * Often contains a pointer.
1443 * Returns 0 if successful (some ioctls return positive numbers on
1444 * success as well). Returns a negated errno value in case of error.
1446 * Note: most ioctls are forward onto the block subsystem or further
1447 * down in the scsi subsystem.
1449 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1450 unsigned int cmd
, unsigned long arg
)
1452 struct gendisk
*disk
= bdev
->bd_disk
;
1453 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1454 struct scsi_device
*sdp
= sdkp
->device
;
1455 void __user
*p
= (void __user
*)arg
;
1458 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1459 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1461 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1466 * If we are in the middle of error recovery, don't let anyone
1467 * else try and use this device. Also, if error recovery fails, it
1468 * may try and take the device offline, in which case all further
1469 * access to the device is prohibited.
1471 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1472 (mode
& FMODE_NDELAY
) != 0);
1476 if (is_sed_ioctl(cmd
))
1477 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1480 * Send SCSI addressing ioctls directly to mid level, send other
1481 * ioctls to block level and then onto mid level if they can't be
1485 case SCSI_IOCTL_GET_IDLUN
:
1486 case SCSI_IOCTL_GET_BUS_NUMBER
:
1487 error
= scsi_ioctl(sdp
, cmd
, p
);
1490 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1491 if (error
!= -ENOTTY
)
1493 error
= scsi_ioctl(sdp
, cmd
, p
);
1500 static void set_media_not_present(struct scsi_disk
*sdkp
)
1502 if (sdkp
->media_present
)
1503 sdkp
->device
->changed
= 1;
1505 if (sdkp
->device
->removable
) {
1506 sdkp
->media_present
= 0;
1511 static int media_not_present(struct scsi_disk
*sdkp
,
1512 struct scsi_sense_hdr
*sshdr
)
1514 if (!scsi_sense_valid(sshdr
))
1517 /* not invoked for commands that could return deferred errors */
1518 switch (sshdr
->sense_key
) {
1519 case UNIT_ATTENTION
:
1521 /* medium not present */
1522 if (sshdr
->asc
== 0x3A) {
1523 set_media_not_present(sdkp
);
1531 * sd_check_events - check media events
1532 * @disk: kernel device descriptor
1533 * @clearing: disk events currently being cleared
1535 * Returns mask of DISK_EVENT_*.
1537 * Note: this function is invoked from the block subsystem.
1539 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1541 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1542 struct scsi_device
*sdp
;
1549 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1552 * If the device is offline, don't send any commands - just pretend as
1553 * if the command failed. If the device ever comes back online, we
1554 * can deal with it then. It is only because of unrecoverable errors
1555 * that we would ever take a device offline in the first place.
1557 if (!scsi_device_online(sdp
)) {
1558 set_media_not_present(sdkp
);
1563 * Using TEST_UNIT_READY enables differentiation between drive with
1564 * no cartridge loaded - NOT READY, drive with changed cartridge -
1565 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1567 * Drives that auto spin down. eg iomega jaz 1G, will be started
1568 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1569 * sd_revalidate() is called.
1571 if (scsi_block_when_processing_errors(sdp
)) {
1572 struct scsi_sense_hdr sshdr
= { 0, };
1574 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1577 /* failed to execute TUR, assume media not present */
1578 if (host_byte(retval
)) {
1579 set_media_not_present(sdkp
);
1583 if (media_not_present(sdkp
, &sshdr
))
1588 * For removable scsi disk we have to recognise the presence
1589 * of a disk in the drive.
1591 if (!sdkp
->media_present
)
1593 sdkp
->media_present
= 1;
1596 * sdp->changed is set under the following conditions:
1598 * Medium present state has changed in either direction.
1599 * Device has indicated UNIT_ATTENTION.
1601 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1603 scsi_disk_put(sdkp
);
1607 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1610 struct scsi_device
*sdp
= sdkp
->device
;
1611 const int timeout
= sdp
->request_queue
->rq_timeout
1612 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1613 struct scsi_sense_hdr my_sshdr
;
1615 if (!scsi_device_online(sdp
))
1618 /* caller might not be interested in sense, but we need it */
1622 for (retries
= 3; retries
> 0; --retries
) {
1623 unsigned char cmd
[10] = { 0 };
1625 cmd
[0] = SYNCHRONIZE_CACHE
;
1627 * Leave the rest of the command zero to indicate
1630 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1631 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1637 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1639 if (driver_byte(res
) & DRIVER_SENSE
)
1640 sd_print_sense_hdr(sdkp
, sshdr
);
1642 /* we need to evaluate the error return */
1643 if (scsi_sense_valid(sshdr
) &&
1644 (sshdr
->asc
== 0x3a || /* medium not present */
1645 sshdr
->asc
== 0x20)) /* invalid command */
1646 /* this is no error here */
1649 switch (host_byte(res
)) {
1650 /* ignore errors due to racing a disconnection */
1651 case DID_BAD_TARGET
:
1652 case DID_NO_CONNECT
:
1654 /* signal the upper layer it might try again */
1658 case DID_SOFT_ERROR
:
1667 static void sd_rescan(struct device
*dev
)
1669 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1671 revalidate_disk(sdkp
->disk
);
1675 #ifdef CONFIG_COMPAT
1677 * This gets directly called from VFS. When the ioctl
1678 * is not recognized we go back to the other translation paths.
1680 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1681 unsigned int cmd
, unsigned long arg
)
1683 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1686 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1687 (mode
& FMODE_NDELAY
) != 0);
1692 * Let the static ioctl translation table take care of it.
1694 if (!sdev
->host
->hostt
->compat_ioctl
)
1695 return -ENOIOCTLCMD
;
1696 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1700 static char sd_pr_type(enum pr_type type
)
1703 case PR_WRITE_EXCLUSIVE
:
1705 case PR_EXCLUSIVE_ACCESS
:
1707 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1709 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1711 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1713 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1720 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1721 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1723 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1724 struct scsi_sense_hdr sshdr
;
1726 u8 cmd
[16] = { 0, };
1727 u8 data
[24] = { 0, };
1729 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1732 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1734 put_unaligned_be64(key
, &data
[0]);
1735 put_unaligned_be64(sa_key
, &data
[8]);
1738 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1739 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1741 if ((driver_byte(result
) & DRIVER_SENSE
) &&
1742 (scsi_sense_valid(&sshdr
))) {
1743 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1744 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1750 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1753 if (flags
& ~PR_FL_IGNORE_KEY
)
1755 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1756 old_key
, new_key
, 0,
1757 (1 << 0) /* APTPL */);
1760 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1765 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1768 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1770 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1773 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1774 enum pr_type type
, bool abort
)
1776 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1777 sd_pr_type(type
), 0);
1780 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1782 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1785 static const struct pr_ops sd_pr_ops
= {
1786 .pr_register
= sd_pr_register
,
1787 .pr_reserve
= sd_pr_reserve
,
1788 .pr_release
= sd_pr_release
,
1789 .pr_preempt
= sd_pr_preempt
,
1790 .pr_clear
= sd_pr_clear
,
1793 static const struct block_device_operations sd_fops
= {
1794 .owner
= THIS_MODULE
,
1796 .release
= sd_release
,
1798 .getgeo
= sd_getgeo
,
1799 #ifdef CONFIG_COMPAT
1800 .compat_ioctl
= sd_compat_ioctl
,
1802 .check_events
= sd_check_events
,
1803 .revalidate_disk
= sd_revalidate_disk
,
1804 .unlock_native_capacity
= sd_unlock_native_capacity
,
1805 .pr_ops
= &sd_pr_ops
,
1809 * sd_eh_reset - reset error handling callback
1810 * @scmd: sd-issued command that has failed
1812 * This function is called by the SCSI midlayer before starting
1813 * SCSI EH. When counting medium access failures we have to be
1814 * careful to register it only only once per device and SCSI EH run;
1815 * there might be several timed out commands which will cause the
1816 * 'max_medium_access_timeouts' counter to trigger after the first
1817 * SCSI EH run already and set the device to offline.
1818 * So this function resets the internal counter before starting SCSI EH.
1820 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1822 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1824 /* New SCSI EH run, reset gate variable */
1825 sdkp
->ignore_medium_access_errors
= false;
1829 * sd_eh_action - error handling callback
1830 * @scmd: sd-issued command that has failed
1831 * @eh_disp: The recovery disposition suggested by the midlayer
1833 * This function is called by the SCSI midlayer upon completion of an
1834 * error test command (currently TEST UNIT READY). The result of sending
1835 * the eh command is passed in eh_disp. We're looking for devices that
1836 * fail medium access commands but are OK with non access commands like
1837 * test unit ready (so wrongly see the device as having a successful
1840 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1842 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1843 struct scsi_device
*sdev
= scmd
->device
;
1845 if (!scsi_device_online(sdev
) ||
1846 !scsi_medium_access_command(scmd
) ||
1847 host_byte(scmd
->result
) != DID_TIME_OUT
||
1852 * The device has timed out executing a medium access command.
1853 * However, the TEST UNIT READY command sent during error
1854 * handling completed successfully. Either the device is in the
1855 * process of recovering or has it suffered an internal failure
1856 * that prevents access to the storage medium.
1858 if (!sdkp
->ignore_medium_access_errors
) {
1859 sdkp
->medium_access_timed_out
++;
1860 sdkp
->ignore_medium_access_errors
= true;
1864 * If the device keeps failing read/write commands but TEST UNIT
1865 * READY always completes successfully we assume that medium
1866 * access is no longer possible and take the device offline.
1868 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1869 scmd_printk(KERN_ERR
, scmd
,
1870 "Medium access timeout failure. Offlining disk!\n");
1871 mutex_lock(&sdev
->state_mutex
);
1872 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1873 mutex_unlock(&sdev
->state_mutex
);
1881 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1883 struct request
*req
= scmd
->request
;
1884 struct scsi_device
*sdev
= scmd
->device
;
1885 unsigned int transferred
, good_bytes
;
1886 u64 start_lba
, end_lba
, bad_lba
;
1889 * Some commands have a payload smaller than the device logical
1890 * block size (e.g. INQUIRY on a 4K disk).
1892 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1895 /* Check if we have a 'bad_lba' information */
1896 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1897 SCSI_SENSE_BUFFERSIZE
,
1902 * If the bad lba was reported incorrectly, we have no idea where
1905 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1906 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1907 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1911 * resid is optional but mostly filled in. When it's unused,
1912 * its value is zero, so we assume the whole buffer transferred
1914 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1916 /* This computation should always be done in terms of the
1917 * resolution of the device's medium.
1919 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1921 return min(good_bytes
, transferred
);
1925 * sd_done - bottom half handler: called when the lower level
1926 * driver has completed (successfully or otherwise) a scsi command.
1927 * @SCpnt: mid-level's per command structure.
1929 * Note: potentially run from within an ISR. Must not block.
1931 static int sd_done(struct scsi_cmnd
*SCpnt
)
1933 int result
= SCpnt
->result
;
1934 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1935 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1937 struct scsi_sense_hdr sshdr
;
1938 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1939 struct request
*req
= SCpnt
->request
;
1940 int sense_valid
= 0;
1941 int sense_deferred
= 0;
1943 switch (req_op(req
)) {
1944 case REQ_OP_DISCARD
:
1945 case REQ_OP_WRITE_ZEROES
:
1946 case REQ_OP_WRITE_SAME
:
1947 case REQ_OP_ZONE_RESET
:
1949 good_bytes
= blk_rq_bytes(req
);
1950 scsi_set_resid(SCpnt
, 0);
1953 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1956 case REQ_OP_ZONE_REPORT
:
1958 good_bytes
= scsi_bufflen(SCpnt
)
1959 - scsi_get_resid(SCpnt
);
1960 scsi_set_resid(SCpnt
, 0);
1963 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1968 * In case of bogus fw or device, we could end up having
1969 * an unaligned partial completion. Check this here and force
1972 resid
= scsi_get_resid(SCpnt
);
1973 if (resid
& (sector_size
- 1)) {
1974 sd_printk(KERN_INFO
, sdkp
,
1975 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1976 resid
, sector_size
);
1977 resid
= min(scsi_bufflen(SCpnt
),
1978 round_up(resid
, sector_size
));
1979 scsi_set_resid(SCpnt
, resid
);
1984 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
1986 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
1988 sdkp
->medium_access_timed_out
= 0;
1990 if (driver_byte(result
) != DRIVER_SENSE
&&
1991 (!sense_valid
|| sense_deferred
))
1994 switch (sshdr
.sense_key
) {
1995 case HARDWARE_ERROR
:
1997 good_bytes
= sd_completed_bytes(SCpnt
);
1999 case RECOVERED_ERROR
:
2000 good_bytes
= scsi_bufflen(SCpnt
);
2003 /* This indicates a false check condition, so ignore it. An
2004 * unknown amount of data was transferred so treat it as an
2008 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2010 case ABORTED_COMMAND
:
2011 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2012 good_bytes
= sd_completed_bytes(SCpnt
);
2014 case ILLEGAL_REQUEST
:
2015 switch (sshdr
.asc
) {
2016 case 0x10: /* DIX: Host detected corruption */
2017 good_bytes
= sd_completed_bytes(SCpnt
);
2019 case 0x20: /* INVALID COMMAND OPCODE */
2020 case 0x24: /* INVALID FIELD IN CDB */
2021 switch (SCpnt
->cmnd
[0]) {
2023 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2027 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2028 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2030 sdkp
->device
->no_write_same
= 1;
2031 sd_config_write_same(sdkp
);
2032 req
->__data_len
= blk_rq_bytes(req
);
2033 req
->rq_flags
|= RQF_QUIET
;
2044 if (sd_is_zoned(sdkp
))
2045 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2047 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2048 "sd_done: completed %d of %d bytes\n",
2049 good_bytes
, scsi_bufflen(SCpnt
)));
2051 if (rq_data_dir(SCpnt
->request
) == READ
&& scsi_prot_sg_count(SCpnt
))
2052 sd_dif_complete(SCpnt
, good_bytes
);
2058 * spinup disk - called only in sd_revalidate_disk()
2061 sd_spinup_disk(struct scsi_disk
*sdkp
)
2063 unsigned char cmd
[10];
2064 unsigned long spintime_expire
= 0;
2065 int retries
, spintime
;
2066 unsigned int the_result
;
2067 struct scsi_sense_hdr sshdr
;
2068 int sense_valid
= 0;
2072 /* Spin up drives, as required. Only do this at boot time */
2073 /* Spinup needs to be done for module loads too. */
2078 cmd
[0] = TEST_UNIT_READY
;
2079 memset((void *) &cmd
[1], 0, 9);
2081 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2084 SD_MAX_RETRIES
, NULL
);
2087 * If the drive has indicated to us that it
2088 * doesn't have any media in it, don't bother
2089 * with any more polling.
2091 if (media_not_present(sdkp
, &sshdr
))
2095 sense_valid
= scsi_sense_valid(&sshdr
);
2097 } while (retries
< 3 &&
2098 (!scsi_status_is_good(the_result
) ||
2099 ((driver_byte(the_result
) & DRIVER_SENSE
) &&
2100 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2102 if ((driver_byte(the_result
) & DRIVER_SENSE
) == 0) {
2103 /* no sense, TUR either succeeded or failed
2104 * with a status error */
2105 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2106 sd_print_result(sdkp
, "Test Unit Ready failed",
2113 * The device does not want the automatic start to be issued.
2115 if (sdkp
->device
->no_start_on_add
)
2118 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2119 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2120 break; /* manual intervention required */
2121 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2122 break; /* standby */
2123 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2124 break; /* unavailable */
2126 * Issue command to spin up drive when not ready
2129 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2130 cmd
[0] = START_STOP
;
2131 cmd
[1] = 1; /* Return immediately */
2132 memset((void *) &cmd
[2], 0, 8);
2133 cmd
[4] = 1; /* Start spin cycle */
2134 if (sdkp
->device
->start_stop_pwr_cond
)
2136 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2138 SD_TIMEOUT
, SD_MAX_RETRIES
,
2140 spintime_expire
= jiffies
+ 100 * HZ
;
2143 /* Wait 1 second for next try */
2148 * Wait for USB flash devices with slow firmware.
2149 * Yes, this sense key/ASC combination shouldn't
2150 * occur here. It's characteristic of these devices.
2152 } else if (sense_valid
&&
2153 sshdr
.sense_key
== UNIT_ATTENTION
&&
2154 sshdr
.asc
== 0x28) {
2156 spintime_expire
= jiffies
+ 5 * HZ
;
2159 /* Wait 1 second for next try */
2162 /* we don't understand the sense code, so it's
2163 * probably pointless to loop */
2165 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2166 sd_print_sense_hdr(sdkp
, &sshdr
);
2171 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2174 if (scsi_status_is_good(the_result
))
2177 printk("not responding...\n");
2182 * Determine whether disk supports Data Integrity Field.
2184 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2186 struct scsi_device
*sdp
= sdkp
->device
;
2190 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2193 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2195 if (type
> T10_PI_TYPE3_PROTECTION
)
2197 else if (scsi_host_dif_capable(sdp
->host
, type
))
2200 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2203 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2204 " protection type %u. Disabling disk!\n",
2208 sd_printk(KERN_NOTICE
, sdkp
,
2209 "Enabling DIF Type %u protection\n", type
);
2212 sd_printk(KERN_NOTICE
, sdkp
,
2213 "Disabling DIF Type %u protection\n", type
);
2217 sdkp
->protection_type
= type
;
2222 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2223 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2226 if (driver_byte(the_result
) & DRIVER_SENSE
)
2227 sd_print_sense_hdr(sdkp
, sshdr
);
2229 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2232 * Set dirty bit for removable devices if not ready -
2233 * sometimes drives will not report this properly.
2235 if (sdp
->removable
&&
2236 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2237 set_media_not_present(sdkp
);
2240 * We used to set media_present to 0 here to indicate no media
2241 * in the drive, but some drives fail read capacity even with
2242 * media present, so we can't do that.
2244 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2248 #if RC16_LEN > SD_BUF_SIZE
2249 #error RC16_LEN must not be more than SD_BUF_SIZE
2252 #define READ_CAPACITY_RETRIES_ON_RESET 10
2255 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2256 * and the reported logical block size is bigger than 512 bytes. Note
2257 * that last_sector is a u64 and therefore logical_to_sectors() is not
2260 static bool sd_addressable_capacity(u64 lba
, unsigned int sector_size
)
2262 u64 last_sector
= (lba
+ 1ULL) << (ilog2(sector_size
) - 9);
2264 if (sizeof(sector_t
) == 4 && last_sector
> U32_MAX
)
2270 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2271 unsigned char *buffer
)
2273 unsigned char cmd
[16];
2274 struct scsi_sense_hdr sshdr
;
2275 int sense_valid
= 0;
2277 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2278 unsigned int alignment
;
2279 unsigned long long lba
;
2280 unsigned sector_size
;
2282 if (sdp
->no_read_capacity_16
)
2287 cmd
[0] = SERVICE_ACTION_IN_16
;
2288 cmd
[1] = SAI_READ_CAPACITY_16
;
2290 memset(buffer
, 0, RC16_LEN
);
2292 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2293 buffer
, RC16_LEN
, &sshdr
,
2294 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2296 if (media_not_present(sdkp
, &sshdr
))
2300 sense_valid
= scsi_sense_valid(&sshdr
);
2302 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2303 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2305 /* Invalid Command Operation Code or
2306 * Invalid Field in CDB, just retry
2307 * silently with RC10 */
2310 sshdr
.sense_key
== UNIT_ATTENTION
&&
2311 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2312 /* Device reset might occur several times,
2313 * give it one more chance */
2314 if (--reset_retries
> 0)
2319 } while (the_result
&& retries
);
2322 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2323 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2327 sector_size
= get_unaligned_be32(&buffer
[8]);
2328 lba
= get_unaligned_be64(&buffer
[0]);
2330 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2335 if (!sd_addressable_capacity(lba
, sector_size
)) {
2336 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2337 "kernel compiled with support for large block "
2343 /* Logical blocks per physical block exponent */
2344 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2347 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2349 /* Lowest aligned logical block */
2350 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2351 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2352 if (alignment
&& sdkp
->first_scan
)
2353 sd_printk(KERN_NOTICE
, sdkp
,
2354 "physical block alignment offset: %u\n", alignment
);
2356 if (buffer
[14] & 0x80) { /* LBPME */
2359 if (buffer
[14] & 0x40) /* LBPRZ */
2362 sd_config_discard(sdkp
, SD_LBP_WS16
);
2365 sdkp
->capacity
= lba
+ 1;
2369 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2370 unsigned char *buffer
)
2372 unsigned char cmd
[16];
2373 struct scsi_sense_hdr sshdr
;
2374 int sense_valid
= 0;
2376 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2378 unsigned sector_size
;
2381 cmd
[0] = READ_CAPACITY
;
2382 memset(&cmd
[1], 0, 9);
2383 memset(buffer
, 0, 8);
2385 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2387 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2389 if (media_not_present(sdkp
, &sshdr
))
2393 sense_valid
= scsi_sense_valid(&sshdr
);
2395 sshdr
.sense_key
== UNIT_ATTENTION
&&
2396 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2397 /* Device reset might occur several times,
2398 * give it one more chance */
2399 if (--reset_retries
> 0)
2404 } while (the_result
&& retries
);
2407 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2408 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2412 sector_size
= get_unaligned_be32(&buffer
[4]);
2413 lba
= get_unaligned_be32(&buffer
[0]);
2415 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2416 /* Some buggy (usb cardreader) devices return an lba of
2417 0xffffffff when the want to report a size of 0 (with
2418 which they really mean no media is present) */
2420 sdkp
->physical_block_size
= sector_size
;
2424 if (!sd_addressable_capacity(lba
, sector_size
)) {
2425 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2426 "kernel compiled with support for large block "
2432 sdkp
->capacity
= lba
+ 1;
2433 sdkp
->physical_block_size
= sector_size
;
2437 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2439 if (sdp
->host
->max_cmd_len
< 16)
2441 if (sdp
->try_rc_10_first
)
2443 if (sdp
->scsi_level
> SCSI_SPC_2
)
2445 if (scsi_device_protection(sdp
))
2451 * read disk capacity
2454 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2457 struct scsi_device
*sdp
= sdkp
->device
;
2459 if (sd_try_rc16_first(sdp
)) {
2460 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2461 if (sector_size
== -EOVERFLOW
)
2463 if (sector_size
== -ENODEV
)
2465 if (sector_size
< 0)
2466 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2467 if (sector_size
< 0)
2470 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2471 if (sector_size
== -EOVERFLOW
)
2473 if (sector_size
< 0)
2475 if ((sizeof(sdkp
->capacity
) > 4) &&
2476 (sdkp
->capacity
> 0xffffffffULL
)) {
2477 int old_sector_size
= sector_size
;
2478 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2479 "Trying to use READ CAPACITY(16).\n");
2480 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2481 if (sector_size
< 0) {
2482 sd_printk(KERN_NOTICE
, sdkp
,
2483 "Using 0xffffffff as device size\n");
2484 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2485 sector_size
= old_sector_size
;
2491 /* Some devices are known to return the total number of blocks,
2492 * not the highest block number. Some devices have versions
2493 * which do this and others which do not. Some devices we might
2494 * suspect of doing this but we don't know for certain.
2496 * If we know the reported capacity is wrong, decrement it. If
2497 * we can only guess, then assume the number of blocks is even
2498 * (usually true but not always) and err on the side of lowering
2501 if (sdp
->fix_capacity
||
2502 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2503 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2504 "from its reported value: %llu\n",
2505 (unsigned long long) sdkp
->capacity
);
2510 if (sector_size
== 0) {
2512 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2516 if (sector_size
!= 512 &&
2517 sector_size
!= 1024 &&
2518 sector_size
!= 2048 &&
2519 sector_size
!= 4096) {
2520 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2523 * The user might want to re-format the drive with
2524 * a supported sectorsize. Once this happens, it
2525 * would be relatively trivial to set the thing up.
2526 * For this reason, we leave the thing in the table.
2530 * set a bogus sector size so the normal read/write
2531 * logic in the block layer will eventually refuse any
2532 * request on this device without tripping over power
2533 * of two sector size assumptions
2537 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2538 blk_queue_physical_block_size(sdp
->request_queue
,
2539 sdkp
->physical_block_size
);
2540 sdkp
->device
->sector_size
= sector_size
;
2542 if (sdkp
->capacity
> 0xffffffff)
2543 sdp
->use_16_for_rw
= 1;
2548 * Print disk capacity
2551 sd_print_capacity(struct scsi_disk
*sdkp
,
2552 sector_t old_capacity
)
2554 int sector_size
= sdkp
->device
->sector_size
;
2555 char cap_str_2
[10], cap_str_10
[10];
2557 string_get_size(sdkp
->capacity
, sector_size
,
2558 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2559 string_get_size(sdkp
->capacity
, sector_size
,
2560 STRING_UNITS_10
, cap_str_10
,
2561 sizeof(cap_str_10
));
2563 if (sdkp
->first_scan
|| old_capacity
!= sdkp
->capacity
) {
2564 sd_printk(KERN_NOTICE
, sdkp
,
2565 "%llu %d-byte logical blocks: (%s/%s)\n",
2566 (unsigned long long)sdkp
->capacity
,
2567 sector_size
, cap_str_10
, cap_str_2
);
2569 if (sdkp
->physical_block_size
!= sector_size
)
2570 sd_printk(KERN_NOTICE
, sdkp
,
2571 "%u-byte physical blocks\n",
2572 sdkp
->physical_block_size
);
2574 sd_zbc_print_zones(sdkp
);
2578 /* called with buffer of length 512 */
2580 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2581 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2582 struct scsi_sense_hdr
*sshdr
)
2584 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2585 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2590 * read write protect setting, if possible - called only in sd_revalidate_disk()
2591 * called with buffer of length SD_BUF_SIZE
2594 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2597 struct scsi_device
*sdp
= sdkp
->device
;
2598 struct scsi_mode_data data
;
2599 int old_wp
= sdkp
->write_prot
;
2601 set_disk_ro(sdkp
->disk
, 0);
2602 if (sdp
->skip_ms_page_3f
) {
2603 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2607 if (sdp
->use_192_bytes_for_3f
) {
2608 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2611 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2612 * We have to start carefully: some devices hang if we ask
2613 * for more than is available.
2615 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2618 * Second attempt: ask for page 0 When only page 0 is
2619 * implemented, a request for page 3F may return Sense Key
2620 * 5: Illegal Request, Sense Code 24: Invalid field in
2623 if (!scsi_status_is_good(res
))
2624 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2627 * Third attempt: ask 255 bytes, as we did earlier.
2629 if (!scsi_status_is_good(res
))
2630 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2634 if (!scsi_status_is_good(res
)) {
2635 sd_first_printk(KERN_WARNING
, sdkp
,
2636 "Test WP failed, assume Write Enabled\n");
2638 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2639 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2640 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2641 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2642 sdkp
->write_prot
? "on" : "off");
2643 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2649 * sd_read_cache_type - called only from sd_revalidate_disk()
2650 * called with buffer of length SD_BUF_SIZE
2653 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2656 struct scsi_device
*sdp
= sdkp
->device
;
2661 struct scsi_mode_data data
;
2662 struct scsi_sense_hdr sshdr
;
2663 int old_wce
= sdkp
->WCE
;
2664 int old_rcd
= sdkp
->RCD
;
2665 int old_dpofua
= sdkp
->DPOFUA
;
2668 if (sdkp
->cache_override
)
2672 if (sdp
->skip_ms_page_8
) {
2673 if (sdp
->type
== TYPE_RBC
)
2676 if (sdp
->skip_ms_page_3f
)
2679 if (sdp
->use_192_bytes_for_3f
)
2683 } else if (sdp
->type
== TYPE_RBC
) {
2691 /* cautiously ask */
2692 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2695 if (!scsi_status_is_good(res
))
2698 if (!data
.header_length
) {
2701 sd_first_printk(KERN_ERR
, sdkp
,
2702 "Missing header in MODE_SENSE response\n");
2705 /* that went OK, now ask for the proper length */
2709 * We're only interested in the first three bytes, actually.
2710 * But the data cache page is defined for the first 20.
2714 else if (len
> SD_BUF_SIZE
) {
2715 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2716 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2719 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2723 if (len
> first_len
)
2724 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2727 if (scsi_status_is_good(res
)) {
2728 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2730 while (offset
< len
) {
2731 u8 page_code
= buffer
[offset
] & 0x3F;
2732 u8 spf
= buffer
[offset
] & 0x40;
2734 if (page_code
== 8 || page_code
== 6) {
2735 /* We're interested only in the first 3 bytes.
2737 if (len
- offset
<= 2) {
2738 sd_first_printk(KERN_ERR
, sdkp
,
2739 "Incomplete mode parameter "
2743 modepage
= page_code
;
2747 /* Go to the next page */
2748 if (spf
&& len
- offset
> 3)
2749 offset
+= 4 + (buffer
[offset
+2] << 8) +
2751 else if (!spf
&& len
- offset
> 1)
2752 offset
+= 2 + buffer
[offset
+1];
2754 sd_first_printk(KERN_ERR
, sdkp
,
2756 "parameter data\n");
2762 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2766 if (modepage
== 8) {
2767 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2768 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2770 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2774 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2775 if (sdp
->broken_fua
) {
2776 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2778 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2779 !sdkp
->device
->use_16_for_rw
) {
2780 sd_first_printk(KERN_NOTICE
, sdkp
,
2781 "Uses READ/WRITE(6), disabling FUA\n");
2785 /* No cache flush allowed for write protected devices */
2786 if (sdkp
->WCE
&& sdkp
->write_prot
)
2789 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2790 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2791 sd_printk(KERN_NOTICE
, sdkp
,
2792 "Write cache: %s, read cache: %s, %s\n",
2793 sdkp
->WCE
? "enabled" : "disabled",
2794 sdkp
->RCD
? "disabled" : "enabled",
2795 sdkp
->DPOFUA
? "supports DPO and FUA"
2796 : "doesn't support DPO or FUA");
2802 if (scsi_sense_valid(&sshdr
) &&
2803 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2804 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2805 /* Invalid field in CDB */
2806 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2808 sd_first_printk(KERN_ERR
, sdkp
,
2809 "Asking for cache data failed\n");
2812 if (sdp
->wce_default_on
) {
2813 sd_first_printk(KERN_NOTICE
, sdkp
,
2814 "Assuming drive cache: write back\n");
2817 sd_first_printk(KERN_ERR
, sdkp
,
2818 "Assuming drive cache: write through\n");
2826 * The ATO bit indicates whether the DIF application tag is available
2827 * for use by the operating system.
2829 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2832 struct scsi_device
*sdp
= sdkp
->device
;
2833 struct scsi_mode_data data
;
2834 struct scsi_sense_hdr sshdr
;
2836 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2839 if (sdkp
->protection_type
== 0)
2842 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2843 SD_MAX_RETRIES
, &data
, &sshdr
);
2845 if (!scsi_status_is_good(res
) || !data
.header_length
||
2847 sd_first_printk(KERN_WARNING
, sdkp
,
2848 "getting Control mode page failed, assume no ATO\n");
2850 if (scsi_sense_valid(&sshdr
))
2851 sd_print_sense_hdr(sdkp
, &sshdr
);
2856 offset
= data
.header_length
+ data
.block_descriptor_length
;
2858 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2859 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2863 if ((buffer
[offset
+ 5] & 0x80) == 0)
2872 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2873 * @sdkp: disk to query
2875 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2877 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2878 const int vpd_len
= 64;
2879 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2882 /* Block Limits VPD */
2883 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2886 blk_queue_io_min(sdkp
->disk
->queue
,
2887 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2889 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2890 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2892 if (buffer
[3] == 0x3c) {
2893 unsigned int lba_count
, desc_count
;
2895 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2900 lba_count
= get_unaligned_be32(&buffer
[20]);
2901 desc_count
= get_unaligned_be32(&buffer
[24]);
2903 if (lba_count
&& desc_count
)
2904 sdkp
->max_unmap_blocks
= lba_count
;
2906 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2908 if (buffer
[32] & 0x80)
2909 sdkp
->unmap_alignment
=
2910 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2912 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2914 if (sdkp
->max_unmap_blocks
)
2915 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2917 sd_config_discard(sdkp
, SD_LBP_WS16
);
2919 } else { /* LBP VPD page tells us what to use */
2920 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2921 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2922 else if (sdkp
->lbpws
)
2923 sd_config_discard(sdkp
, SD_LBP_WS16
);
2924 else if (sdkp
->lbpws10
)
2925 sd_config_discard(sdkp
, SD_LBP_WS10
);
2927 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2936 * sd_read_block_characteristics - Query block dev. characteristics
2937 * @sdkp: disk to query
2939 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2941 struct request_queue
*q
= sdkp
->disk
->queue
;
2942 unsigned char *buffer
;
2944 const int vpd_len
= 64;
2946 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2949 /* Block Device Characteristics VPD */
2950 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2953 rot
= get_unaligned_be16(&buffer
[4]);
2956 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
, q
);
2957 queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM
, q
);
2960 if (sdkp
->device
->type
== TYPE_ZBC
) {
2962 q
->limits
.zoned
= BLK_ZONED_HM
;
2964 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2965 if (sdkp
->zoned
== 1)
2967 q
->limits
.zoned
= BLK_ZONED_HA
;
2970 * Treat drive-managed devices as
2971 * regular block devices.
2973 q
->limits
.zoned
= BLK_ZONED_NONE
;
2975 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
2976 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
2977 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
2984 * sd_read_block_provisioning - Query provisioning VPD page
2985 * @sdkp: disk to query
2987 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
2989 unsigned char *buffer
;
2990 const int vpd_len
= 8;
2992 if (sdkp
->lbpme
== 0)
2995 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2997 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
3001 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
3002 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3003 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3009 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3011 struct scsi_device
*sdev
= sdkp
->device
;
3013 if (sdev
->host
->no_write_same
) {
3014 sdev
->no_write_same
= 1;
3019 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3020 /* too large values might cause issues with arcmsr */
3021 int vpd_buf_len
= 64;
3023 sdev
->no_report_opcodes
= 1;
3025 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3026 * CODES is unsupported and the device has an ATA
3027 * Information VPD page (SAT).
3029 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3030 sdev
->no_write_same
= 1;
3033 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3036 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3040 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3042 struct scsi_device
*sdev
= sdkp
->device
;
3044 if (!sdev
->security_supported
)
3047 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3048 SECURITY_PROTOCOL_IN
) == 1 &&
3049 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3050 SECURITY_PROTOCOL_OUT
) == 1)
3055 * sd_revalidate_disk - called the first time a new disk is seen,
3056 * performs disk spin up, read_capacity, etc.
3057 * @disk: struct gendisk we care about
3059 static int sd_revalidate_disk(struct gendisk
*disk
)
3061 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3062 struct scsi_device
*sdp
= sdkp
->device
;
3063 struct request_queue
*q
= sdkp
->disk
->queue
;
3064 sector_t old_capacity
= sdkp
->capacity
;
3065 unsigned char *buffer
;
3066 unsigned int dev_max
, rw_max
;
3068 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3069 "sd_revalidate_disk\n"));
3072 * If the device is offline, don't try and read capacity or any
3073 * of the other niceties.
3075 if (!scsi_device_online(sdp
))
3078 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3080 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3081 "allocation failure.\n");
3085 sd_spinup_disk(sdkp
);
3088 * Without media there is no reason to ask; moreover, some devices
3089 * react badly if we do.
3091 if (sdkp
->media_present
) {
3092 sd_read_capacity(sdkp
, buffer
);
3094 if (scsi_device_supports_vpd(sdp
)) {
3095 sd_read_block_provisioning(sdkp
);
3096 sd_read_block_limits(sdkp
);
3097 sd_read_block_characteristics(sdkp
);
3098 sd_zbc_read_zones(sdkp
, buffer
);
3101 sd_print_capacity(sdkp
, old_capacity
);
3103 sd_read_write_protect_flag(sdkp
, buffer
);
3104 sd_read_cache_type(sdkp
, buffer
);
3105 sd_read_app_tag_own(sdkp
, buffer
);
3106 sd_read_write_same(sdkp
, buffer
);
3107 sd_read_security(sdkp
, buffer
);
3111 * We now have all cache related info, determine how we deal
3112 * with flush requests.
3114 sd_set_flush_flag(sdkp
);
3116 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3117 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3119 /* Some devices report a maximum block count for READ/WRITE requests. */
3120 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3121 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3124 * Determine the device's preferred I/O size for reads and writes
3125 * unless the reported value is unreasonably small, large, or
3128 if (sdkp
->opt_xfer_blocks
&&
3129 sdkp
->opt_xfer_blocks
<= dev_max
&&
3130 sdkp
->opt_xfer_blocks
<= SD_DEF_XFER_BLOCKS
&&
3131 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
) >= PAGE_SIZE
) {
3132 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3133 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3135 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3136 (sector_t
)BLK_DEF_MAX_SECTORS
);
3138 /* Do not exceed controller limit */
3139 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3142 * Only update max_sectors if previously unset or if the current value
3143 * exceeds the capabilities of the hardware.
3145 if (sdkp
->first_scan
||
3146 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3147 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3148 q
->limits
.max_sectors
= rw_max
;
3150 sdkp
->first_scan
= 0;
3152 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3153 sd_config_write_same(sdkp
);
3161 * sd_unlock_native_capacity - unlock native capacity
3162 * @disk: struct gendisk to set capacity for
3164 * Block layer calls this function if it detects that partitions
3165 * on @disk reach beyond the end of the device. If the SCSI host
3166 * implements ->unlock_native_capacity() method, it's invoked to
3167 * give it a chance to adjust the device capacity.
3170 * Defined by block layer. Might sleep.
3172 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3174 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3176 if (sdev
->host
->hostt
->unlock_native_capacity
)
3177 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3181 * sd_format_disk_name - format disk name
3182 * @prefix: name prefix - ie. "sd" for SCSI disks
3183 * @index: index of the disk to format name for
3184 * @buf: output buffer
3185 * @buflen: length of the output buffer
3187 * SCSI disk names starts at sda. The 26th device is sdz and the
3188 * 27th is sdaa. The last one for two lettered suffix is sdzz
3189 * which is followed by sdaaa.
3191 * This is basically 26 base counting with one extra 'nil' entry
3192 * at the beginning from the second digit on and can be
3193 * determined using similar method as 26 base conversion with the
3194 * index shifted -1 after each digit is computed.
3200 * 0 on success, -errno on failure.
3202 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3204 const int base
= 'z' - 'a' + 1;
3205 char *begin
= buf
+ strlen(prefix
);
3206 char *end
= buf
+ buflen
;
3216 *--p
= 'a' + (index
% unit
);
3217 index
= (index
/ unit
) - 1;
3218 } while (index
>= 0);
3220 memmove(begin
, p
, end
- p
);
3221 memcpy(buf
, prefix
, strlen(prefix
));
3227 * The asynchronous part of sd_probe
3229 static void sd_probe_async(void *data
, async_cookie_t cookie
)
3231 struct scsi_disk
*sdkp
= data
;
3232 struct scsi_device
*sdp
;
3239 index
= sdkp
->index
;
3240 dev
= &sdp
->sdev_gendev
;
3242 gd
->major
= sd_major((index
& 0xf0) >> 4);
3243 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3245 gd
->fops
= &sd_fops
;
3246 gd
->private_data
= &sdkp
->driver
;
3247 gd
->queue
= sdkp
->device
->request_queue
;
3249 /* defaults, until the device tells us otherwise */
3250 sdp
->sector_size
= 512;
3252 sdkp
->media_present
= 1;
3253 sdkp
->write_prot
= 0;
3254 sdkp
->cache_override
= 0;
3258 sdkp
->first_scan
= 1;
3259 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3261 sd_revalidate_disk(gd
);
3263 gd
->flags
= GENHD_FL_EXT_DEVT
;
3264 if (sdp
->removable
) {
3265 gd
->flags
|= GENHD_FL_REMOVABLE
;
3266 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3269 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3270 device_add_disk(dev
, gd
);
3272 sd_dif_config_host(sdkp
);
3274 sd_revalidate_disk(gd
);
3276 if (sdkp
->security
) {
3277 sdkp
->opal_dev
= init_opal_dev(sdp
, &sd_sec_submit
);
3279 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3282 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3283 sdp
->removable
? "removable " : "");
3284 scsi_autopm_put_device(sdp
);
3285 put_device(&sdkp
->dev
);
3289 * sd_probe - called during driver initialization and whenever a
3290 * new scsi device is attached to the system. It is called once
3291 * for each scsi device (not just disks) present.
3292 * @dev: pointer to device object
3294 * Returns 0 if successful (or not interested in this scsi device
3295 * (e.g. scanner)); 1 when there is an error.
3297 * Note: this function is invoked from the scsi mid-level.
3298 * This function sets up the mapping between a given
3299 * <host,channel,id,lun> (found in sdp) and new device name
3300 * (e.g. /dev/sda). More precisely it is the block device major
3301 * and minor number that is chosen here.
3303 * Assume sd_probe is not re-entrant (for time being)
3304 * Also think about sd_probe() and sd_remove() running coincidentally.
3306 static int sd_probe(struct device
*dev
)
3308 struct scsi_device
*sdp
= to_scsi_device(dev
);
3309 struct scsi_disk
*sdkp
;
3314 scsi_autopm_get_device(sdp
);
3316 if (sdp
->type
!= TYPE_DISK
&&
3317 sdp
->type
!= TYPE_ZBC
&&
3318 sdp
->type
!= TYPE_MOD
&&
3319 sdp
->type
!= TYPE_RBC
)
3322 #ifndef CONFIG_BLK_DEV_ZONED
3323 if (sdp
->type
== TYPE_ZBC
)
3326 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3330 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3334 gd
= alloc_disk(SD_MINORS
);
3339 if (!ida_pre_get(&sd_index_ida
, GFP_KERNEL
))
3342 spin_lock(&sd_index_lock
);
3343 error
= ida_get_new(&sd_index_ida
, &index
);
3344 spin_unlock(&sd_index_lock
);
3345 } while (error
== -EAGAIN
);
3348 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3352 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3354 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3355 goto out_free_index
;
3359 sdkp
->driver
= &sd_template
;
3361 sdkp
->index
= index
;
3362 atomic_set(&sdkp
->openers
, 0);
3363 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3365 if (!sdp
->request_queue
->rq_timeout
) {
3366 if (sdp
->type
!= TYPE_MOD
)
3367 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3369 blk_queue_rq_timeout(sdp
->request_queue
,
3373 device_initialize(&sdkp
->dev
);
3374 sdkp
->dev
.parent
= dev
;
3375 sdkp
->dev
.class = &sd_disk_class
;
3376 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3378 error
= device_add(&sdkp
->dev
);
3380 goto out_free_index
;
3383 dev_set_drvdata(dev
, sdkp
);
3385 get_device(&sdkp
->dev
); /* prevent release before async_schedule */
3386 async_schedule_domain(sd_probe_async
, sdkp
, &scsi_sd_probe_domain
);
3391 spin_lock(&sd_index_lock
);
3392 ida_remove(&sd_index_ida
, index
);
3393 spin_unlock(&sd_index_lock
);
3399 scsi_autopm_put_device(sdp
);
3404 * sd_remove - called whenever a scsi disk (previously recognized by
3405 * sd_probe) is detached from the system. It is called (potentially
3406 * multiple times) during sd module unload.
3407 * @dev: pointer to device object
3409 * Note: this function is invoked from the scsi mid-level.
3410 * This function potentially frees up a device name (e.g. /dev/sdc)
3411 * that could be re-used by a subsequent sd_probe().
3412 * This function is not called when the built-in sd driver is "exit-ed".
3414 static int sd_remove(struct device
*dev
)
3416 struct scsi_disk
*sdkp
;
3419 sdkp
= dev_get_drvdata(dev
);
3420 devt
= disk_devt(sdkp
->disk
);
3421 scsi_autopm_get_device(sdkp
->device
);
3423 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3424 async_synchronize_full_domain(&scsi_sd_probe_domain
);
3425 device_del(&sdkp
->dev
);
3426 del_gendisk(sdkp
->disk
);
3429 sd_zbc_remove(sdkp
);
3431 free_opal_dev(sdkp
->opal_dev
);
3433 blk_register_region(devt
, SD_MINORS
, NULL
,
3434 sd_default_probe
, NULL
, NULL
);
3436 mutex_lock(&sd_ref_mutex
);
3437 dev_set_drvdata(dev
, NULL
);
3438 put_device(&sdkp
->dev
);
3439 mutex_unlock(&sd_ref_mutex
);
3445 * scsi_disk_release - Called to free the scsi_disk structure
3446 * @dev: pointer to embedded class device
3448 * sd_ref_mutex must be held entering this routine. Because it is
3449 * called on last put, you should always use the scsi_disk_get()
3450 * scsi_disk_put() helpers which manipulate the semaphore directly
3451 * and never do a direct put_device.
3453 static void scsi_disk_release(struct device
*dev
)
3455 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3456 struct gendisk
*disk
= sdkp
->disk
;
3458 spin_lock(&sd_index_lock
);
3459 ida_remove(&sd_index_ida
, sdkp
->index
);
3460 spin_unlock(&sd_index_lock
);
3462 disk
->private_data
= NULL
;
3464 put_device(&sdkp
->device
->sdev_gendev
);
3469 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3471 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3472 struct scsi_sense_hdr sshdr
;
3473 struct scsi_device
*sdp
= sdkp
->device
;
3477 cmd
[4] |= 1; /* START */
3479 if (sdp
->start_stop_pwr_cond
)
3480 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3482 if (!scsi_device_online(sdp
))
3485 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3486 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3488 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3489 if (driver_byte(res
) & DRIVER_SENSE
)
3490 sd_print_sense_hdr(sdkp
, &sshdr
);
3491 if (scsi_sense_valid(&sshdr
) &&
3492 /* 0x3a is medium not present */
3497 /* SCSI error codes must not go to the generic layer */
3505 * Send a SYNCHRONIZE CACHE instruction down to the device through
3506 * the normal SCSI command structure. Wait for the command to
3509 static void sd_shutdown(struct device
*dev
)
3511 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3514 return; /* this can happen */
3516 if (pm_runtime_suspended(dev
))
3519 if (sdkp
->WCE
&& sdkp
->media_present
) {
3520 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3521 sd_sync_cache(sdkp
, NULL
);
3524 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3525 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3526 sd_start_stop_device(sdkp
, 0);
3530 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3532 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3533 struct scsi_sense_hdr sshdr
;
3536 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3539 if (sdkp
->WCE
&& sdkp
->media_present
) {
3540 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3541 ret
= sd_sync_cache(sdkp
, &sshdr
);
3544 /* ignore OFFLINE device */
3548 if (!scsi_sense_valid(&sshdr
) ||
3549 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3553 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3554 * doesn't support sync. There's not much to do and
3555 * suspend shouldn't fail.
3561 if (sdkp
->device
->manage_start_stop
) {
3562 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3563 /* an error is not worth aborting a system sleep */
3564 ret
= sd_start_stop_device(sdkp
, 0);
3565 if (ignore_stop_errors
)
3572 static int sd_suspend_system(struct device
*dev
)
3574 return sd_suspend_common(dev
, true);
3577 static int sd_suspend_runtime(struct device
*dev
)
3579 return sd_suspend_common(dev
, false);
3582 static int sd_resume(struct device
*dev
)
3584 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3587 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3590 if (!sdkp
->device
->manage_start_stop
)
3593 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3594 ret
= sd_start_stop_device(sdkp
, 1);
3596 opal_unlock_from_suspend(sdkp
->opal_dev
);
3601 * init_sd - entry point for this driver (both when built in or when
3604 * Note: this function registers this driver with the scsi mid-level.
3606 static int __init
init_sd(void)
3608 int majors
= 0, i
, err
;
3610 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3612 for (i
= 0; i
< SD_MAJORS
; i
++) {
3613 if (register_blkdev(sd_major(i
), "sd") != 0)
3616 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3617 sd_default_probe
, NULL
, NULL
);
3623 err
= class_register(&sd_disk_class
);
3627 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3629 if (!sd_cdb_cache
) {
3630 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3635 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3637 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3642 err
= scsi_register_driver(&sd_template
.gendrv
);
3644 goto err_out_driver
;
3649 mempool_destroy(sd_cdb_pool
);
3652 kmem_cache_destroy(sd_cdb_cache
);
3655 class_unregister(&sd_disk_class
);
3657 for (i
= 0; i
< SD_MAJORS
; i
++)
3658 unregister_blkdev(sd_major(i
), "sd");
3663 * exit_sd - exit point for this driver (when it is a module).
3665 * Note: this function unregisters this driver from the scsi mid-level.
3667 static void __exit
exit_sd(void)
3671 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3673 scsi_unregister_driver(&sd_template
.gendrv
);
3674 mempool_destroy(sd_cdb_pool
);
3675 kmem_cache_destroy(sd_cdb_cache
);
3677 class_unregister(&sd_disk_class
);
3679 for (i
= 0; i
< SD_MAJORS
; i
++) {
3680 blk_unregister_region(sd_major(i
), SD_MINORS
);
3681 unregister_blkdev(sd_major(i
), "sd");
3685 module_init(init_sd
);
3686 module_exit(exit_sd
);
3688 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3689 struct scsi_sense_hdr
*sshdr
)
3691 scsi_print_sense_hdr(sdkp
->device
,
3692 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3695 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3698 const char *hb_string
= scsi_hostbyte_string(result
);
3699 const char *db_string
= scsi_driverbyte_string(result
);
3701 if (hb_string
|| db_string
)
3702 sd_printk(KERN_INFO
, sdkp
,
3703 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3704 hb_string
? hb_string
: "invalid",
3705 db_string
? db_string
: "invalid");
3707 sd_printk(KERN_INFO
, sdkp
,
3708 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3709 msg
, host_byte(result
), driver_byte(result
));