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/pm_runtime.h>
55 #include <linux/t10-pi.h>
56 #include <linux/uaccess.h>
57 #include <asm/unaligned.h>
59 #include <scsi/scsi.h>
60 #include <scsi/scsi_cmnd.h>
61 #include <scsi/scsi_dbg.h>
62 #include <scsi/scsi_device.h>
63 #include <scsi/scsi_driver.h>
64 #include <scsi/scsi_eh.h>
65 #include <scsi/scsi_host.h>
66 #include <scsi/scsi_ioctl.h>
67 #include <scsi/scsicam.h>
70 #include "scsi_priv.h"
71 #include "scsi_logging.h"
73 MODULE_AUTHOR("Eric Youngdale");
74 MODULE_DESCRIPTION("SCSI disk (sd) driver");
75 MODULE_LICENSE("GPL");
77 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
78 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
79 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
93 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
94 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
95 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
98 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
104 static void sd_config_discard(struct scsi_disk
*, unsigned int);
105 static void sd_config_write_same(struct scsi_disk
*);
106 static int sd_revalidate_disk(struct gendisk
*);
107 static void sd_unlock_native_capacity(struct gendisk
*disk
);
108 static int sd_probe(struct device
*);
109 static int sd_remove(struct device
*);
110 static void sd_shutdown(struct device
*);
111 static int sd_suspend_system(struct device
*);
112 static int sd_suspend_runtime(struct device
*);
113 static int sd_resume(struct device
*);
114 static void sd_rescan(struct device
*);
115 static int sd_init_command(struct scsi_cmnd
*SCpnt
);
116 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
117 static int sd_done(struct scsi_cmnd
*);
118 static void sd_eh_reset(struct scsi_cmnd
*);
119 static int sd_eh_action(struct scsi_cmnd
*, int);
120 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
121 static void scsi_disk_release(struct device
*cdev
);
122 static void sd_print_sense_hdr(struct scsi_disk
*, struct scsi_sense_hdr
*);
123 static void sd_print_result(const struct scsi_disk
*, const char *, int);
125 static DEFINE_SPINLOCK(sd_index_lock
);
126 static DEFINE_IDA(sd_index_ida
);
128 /* This semaphore is used to mediate the 0->1 reference get in the
129 * face of object destruction (i.e. we can't allow a get on an
130 * object after last put) */
131 static DEFINE_MUTEX(sd_ref_mutex
);
133 static struct kmem_cache
*sd_cdb_cache
;
134 static mempool_t
*sd_cdb_pool
;
136 static const char *sd_cache_types
[] = {
137 "write through", "none", "write back",
138 "write back, no read (daft)"
141 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
143 bool wc
= false, fua
= false;
151 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
155 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
156 const char *buf
, size_t count
)
158 int i
, ct
= -1, rcd
, wce
, sp
;
159 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
160 struct scsi_device
*sdp
= sdkp
->device
;
163 struct scsi_mode_data data
;
164 struct scsi_sense_hdr sshdr
;
165 static const char temp
[] = "temporary ";
168 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
169 /* no cache control on RBC devices; theoretically they
170 * can do it, but there's probably so many exceptions
171 * it's not worth the risk */
174 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
175 buf
+= sizeof(temp
) - 1;
176 sdkp
->cache_override
= 1;
178 sdkp
->cache_override
= 0;
181 for (i
= 0; i
< ARRAY_SIZE(sd_cache_types
); i
++) {
182 len
= strlen(sd_cache_types
[i
]);
183 if (strncmp(sd_cache_types
[i
], buf
, len
) == 0 &&
191 rcd
= ct
& 0x01 ? 1 : 0;
192 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
194 if (sdkp
->cache_override
) {
197 sd_set_flush_flag(sdkp
);
201 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
202 SD_MAX_RETRIES
, &data
, NULL
))
204 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
205 data
.block_descriptor_length
);
206 buffer_data
= buffer
+ data
.header_length
+
207 data
.block_descriptor_length
;
208 buffer_data
[2] &= ~0x05;
209 buffer_data
[2] |= wce
<< 2 | rcd
;
210 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
211 buffer_data
[0] &= ~0x80;
213 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
214 SD_MAX_RETRIES
, &data
, &sshdr
)) {
215 if (scsi_sense_valid(&sshdr
))
216 sd_print_sense_hdr(sdkp
, &sshdr
);
219 revalidate_disk(sdkp
->disk
);
224 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
227 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
228 struct scsi_device
*sdp
= sdkp
->device
;
230 return snprintf(buf
, 20, "%u\n", sdp
->manage_start_stop
);
234 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
235 const char *buf
, size_t count
)
237 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
238 struct scsi_device
*sdp
= sdkp
->device
;
240 if (!capable(CAP_SYS_ADMIN
))
243 sdp
->manage_start_stop
= simple_strtoul(buf
, NULL
, 10);
247 static DEVICE_ATTR_RW(manage_start_stop
);
250 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
252 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
254 return snprintf(buf
, 40, "%d\n", sdkp
->device
->allow_restart
);
258 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
259 const char *buf
, size_t count
)
261 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
262 struct scsi_device
*sdp
= sdkp
->device
;
264 if (!capable(CAP_SYS_ADMIN
))
267 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
270 sdp
->allow_restart
= simple_strtoul(buf
, NULL
, 10);
274 static DEVICE_ATTR_RW(allow_restart
);
277 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
279 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
280 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
282 return snprintf(buf
, 40, "%s\n", sd_cache_types
[ct
]);
284 static DEVICE_ATTR_RW(cache_type
);
287 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
289 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
291 return snprintf(buf
, 20, "%u\n", sdkp
->DPOFUA
);
293 static DEVICE_ATTR_RO(FUA
);
296 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
299 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
301 return snprintf(buf
, 20, "%u\n", sdkp
->protection_type
);
305 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
306 const char *buf
, size_t count
)
308 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
312 if (!capable(CAP_SYS_ADMIN
))
315 err
= kstrtouint(buf
, 10, &val
);
320 if (val
>= 0 && val
<= T10_PI_TYPE3_PROTECTION
)
321 sdkp
->protection_type
= val
;
325 static DEVICE_ATTR_RW(protection_type
);
328 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
331 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
332 struct scsi_device
*sdp
= sdkp
->device
;
333 unsigned int dif
, dix
;
335 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
336 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
338 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
344 return snprintf(buf
, 20, "none\n");
346 return snprintf(buf
, 20, "%s%u\n", dix
? "dix" : "dif", dif
);
348 static DEVICE_ATTR_RO(protection_mode
);
351 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
353 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
355 return snprintf(buf
, 20, "%u\n", sdkp
->ATO
);
357 static DEVICE_ATTR_RO(app_tag_own
);
360 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
363 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
365 return snprintf(buf
, 20, "%u\n", sdkp
->lbpme
);
367 static DEVICE_ATTR_RO(thin_provisioning
);
369 static const char *lbp_mode
[] = {
370 [SD_LBP_FULL
] = "full",
371 [SD_LBP_UNMAP
] = "unmap",
372 [SD_LBP_WS16
] = "writesame_16",
373 [SD_LBP_WS10
] = "writesame_10",
374 [SD_LBP_ZERO
] = "writesame_zero",
375 [SD_LBP_DISABLE
] = "disabled",
379 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
382 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
384 return snprintf(buf
, 20, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
388 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
389 const char *buf
, size_t count
)
391 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
392 struct scsi_device
*sdp
= sdkp
->device
;
394 if (!capable(CAP_SYS_ADMIN
))
397 if (sd_is_zoned(sdkp
)) {
398 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
402 if (sdp
->type
!= TYPE_DISK
)
405 if (!strncmp(buf
, lbp_mode
[SD_LBP_UNMAP
], 20))
406 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
407 else if (!strncmp(buf
, lbp_mode
[SD_LBP_WS16
], 20))
408 sd_config_discard(sdkp
, SD_LBP_WS16
);
409 else if (!strncmp(buf
, lbp_mode
[SD_LBP_WS10
], 20))
410 sd_config_discard(sdkp
, SD_LBP_WS10
);
411 else if (!strncmp(buf
, lbp_mode
[SD_LBP_ZERO
], 20))
412 sd_config_discard(sdkp
, SD_LBP_ZERO
);
413 else if (!strncmp(buf
, lbp_mode
[SD_LBP_DISABLE
], 20))
414 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
420 static DEVICE_ATTR_RW(provisioning_mode
);
422 static const char *zeroing_mode
[] = {
423 [SD_ZERO_WRITE
] = "write",
424 [SD_ZERO_WS
] = "writesame",
425 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
426 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
430 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
433 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
435 return snprintf(buf
, 20, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
439 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
440 const char *buf
, size_t count
)
442 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
444 if (!capable(CAP_SYS_ADMIN
))
447 if (!strncmp(buf
, zeroing_mode
[SD_ZERO_WRITE
], 20))
448 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
449 else if (!strncmp(buf
, zeroing_mode
[SD_ZERO_WS
], 20))
450 sdkp
->zeroing_mode
= SD_ZERO_WS
;
451 else if (!strncmp(buf
, zeroing_mode
[SD_ZERO_WS16_UNMAP
], 20))
452 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
453 else if (!strncmp(buf
, zeroing_mode
[SD_ZERO_WS10_UNMAP
], 20))
454 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
460 static DEVICE_ATTR_RW(zeroing_mode
);
463 max_medium_access_timeouts_show(struct device
*dev
,
464 struct device_attribute
*attr
, char *buf
)
466 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
468 return snprintf(buf
, 20, "%u\n", sdkp
->max_medium_access_timeouts
);
472 max_medium_access_timeouts_store(struct device
*dev
,
473 struct device_attribute
*attr
, const char *buf
,
476 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
479 if (!capable(CAP_SYS_ADMIN
))
482 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
484 return err
? err
: count
;
486 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
489 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
492 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
494 return snprintf(buf
, 20, "%u\n", sdkp
->max_ws_blocks
);
498 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
499 const char *buf
, size_t count
)
501 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
502 struct scsi_device
*sdp
= sdkp
->device
;
506 if (!capable(CAP_SYS_ADMIN
))
509 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
512 err
= kstrtoul(buf
, 10, &max
);
518 sdp
->no_write_same
= 1;
519 else if (max
<= SD_MAX_WS16_BLOCKS
) {
520 sdp
->no_write_same
= 0;
521 sdkp
->max_ws_blocks
= max
;
524 sd_config_write_same(sdkp
);
528 static DEVICE_ATTR_RW(max_write_same_blocks
);
530 static struct attribute
*sd_disk_attrs
[] = {
531 &dev_attr_cache_type
.attr
,
533 &dev_attr_allow_restart
.attr
,
534 &dev_attr_manage_start_stop
.attr
,
535 &dev_attr_protection_type
.attr
,
536 &dev_attr_protection_mode
.attr
,
537 &dev_attr_app_tag_own
.attr
,
538 &dev_attr_thin_provisioning
.attr
,
539 &dev_attr_provisioning_mode
.attr
,
540 &dev_attr_zeroing_mode
.attr
,
541 &dev_attr_max_write_same_blocks
.attr
,
542 &dev_attr_max_medium_access_timeouts
.attr
,
545 ATTRIBUTE_GROUPS(sd_disk
);
547 static struct class sd_disk_class
= {
549 .owner
= THIS_MODULE
,
550 .dev_release
= scsi_disk_release
,
551 .dev_groups
= sd_disk_groups
,
554 static const struct dev_pm_ops sd_pm_ops
= {
555 .suspend
= sd_suspend_system
,
557 .poweroff
= sd_suspend_system
,
558 .restore
= sd_resume
,
559 .runtime_suspend
= sd_suspend_runtime
,
560 .runtime_resume
= sd_resume
,
563 static struct scsi_driver sd_template
= {
566 .owner
= THIS_MODULE
,
569 .shutdown
= sd_shutdown
,
573 .init_command
= sd_init_command
,
574 .uninit_command
= sd_uninit_command
,
576 .eh_action
= sd_eh_action
,
577 .eh_reset
= sd_eh_reset
,
581 * Dummy kobj_map->probe function.
582 * The default ->probe function will call modprobe, which is
583 * pointless as this module is already loaded.
585 static struct kobject
*sd_default_probe(dev_t devt
, int *partno
, void *data
)
591 * Device no to disk mapping:
593 * major disc2 disc p1
594 * |............|.............|....|....| <- dev_t
597 * Inside a major, we have 16k disks, however mapped non-
598 * contiguously. The first 16 disks are for major0, the next
599 * ones with major1, ... Disk 256 is for major0 again, disk 272
601 * As we stay compatible with our numbering scheme, we can reuse
602 * the well-know SCSI majors 8, 65--71, 136--143.
604 static int sd_major(int major_idx
)
608 return SCSI_DISK0_MAJOR
;
610 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
612 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
615 return 0; /* shut up gcc */
619 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
621 struct scsi_disk
*sdkp
= NULL
;
623 mutex_lock(&sd_ref_mutex
);
625 if (disk
->private_data
) {
626 sdkp
= scsi_disk(disk
);
627 if (scsi_device_get(sdkp
->device
) == 0)
628 get_device(&sdkp
->dev
);
632 mutex_unlock(&sd_ref_mutex
);
636 static void scsi_disk_put(struct scsi_disk
*sdkp
)
638 struct scsi_device
*sdev
= sdkp
->device
;
640 mutex_lock(&sd_ref_mutex
);
641 put_device(&sdkp
->dev
);
642 scsi_device_put(sdev
);
643 mutex_unlock(&sd_ref_mutex
);
646 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
647 unsigned int dix
, unsigned int dif
)
649 struct bio
*bio
= scmd
->request
->bio
;
650 unsigned int prot_op
= sd_prot_op(rq_data_dir(scmd
->request
), dix
, dif
);
651 unsigned int protect
= 0;
653 if (dix
) { /* DIX Type 0, 1, 2, 3 */
654 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
655 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
657 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
658 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
661 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
662 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
664 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
665 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
668 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
669 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
671 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
672 protect
= 3 << 5; /* Disable target PI checking */
674 protect
= 1 << 5; /* Enable target PI checking */
677 scsi_set_prot_op(scmd
, prot_op
);
678 scsi_set_prot_type(scmd
, dif
);
679 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
684 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
686 struct request_queue
*q
= sdkp
->disk
->queue
;
687 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
688 unsigned int max_blocks
= 0;
690 q
->limits
.discard_alignment
=
691 sdkp
->unmap_alignment
* logical_block_size
;
692 q
->limits
.discard_granularity
=
693 max(sdkp
->physical_block_size
,
694 sdkp
->unmap_granularity
* logical_block_size
);
695 sdkp
->provisioning_mode
= mode
;
700 blk_queue_max_discard_sectors(q
, 0);
701 queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD
, q
);
705 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
706 (u32
)SD_MAX_WS16_BLOCKS
);
710 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
711 (u32
)SD_MAX_WS16_BLOCKS
);
715 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
716 (u32
)SD_MAX_WS10_BLOCKS
);
720 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
721 (u32
)SD_MAX_WS10_BLOCKS
);
725 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
726 queue_flag_set_unlocked(QUEUE_FLAG_DISCARD
, q
);
729 static int sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
731 struct scsi_device
*sdp
= cmd
->device
;
732 struct request
*rq
= cmd
->request
;
733 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
734 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
735 unsigned int data_len
= 24;
738 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
739 if (!rq
->special_vec
.bv_page
)
740 return BLKPREP_DEFER
;
741 rq
->special_vec
.bv_offset
= 0;
742 rq
->special_vec
.bv_len
= data_len
;
743 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
746 cmd
->cmnd
[0] = UNMAP
;
749 buf
= page_address(rq
->special_vec
.bv_page
);
750 put_unaligned_be16(6 + 16, &buf
[0]);
751 put_unaligned_be16(16, &buf
[2]);
752 put_unaligned_be64(sector
, &buf
[8]);
753 put_unaligned_be32(nr_sectors
, &buf
[16]);
755 cmd
->allowed
= SD_MAX_RETRIES
;
756 cmd
->transfersize
= data_len
;
757 rq
->timeout
= SD_TIMEOUT
;
758 scsi_req(rq
)->resid_len
= data_len
;
760 return scsi_init_io(cmd
);
763 static int sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
765 struct scsi_device
*sdp
= cmd
->device
;
766 struct request
*rq
= cmd
->request
;
767 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
768 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
769 u32 data_len
= sdp
->sector_size
;
771 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
772 if (!rq
->special_vec
.bv_page
)
773 return BLKPREP_DEFER
;
774 rq
->special_vec
.bv_offset
= 0;
775 rq
->special_vec
.bv_len
= data_len
;
776 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
779 cmd
->cmnd
[0] = WRITE_SAME_16
;
781 cmd
->cmnd
[1] = 0x8; /* UNMAP */
782 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
783 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
785 cmd
->allowed
= SD_MAX_RETRIES
;
786 cmd
->transfersize
= data_len
;
787 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
788 scsi_req(rq
)->resid_len
= data_len
;
790 return scsi_init_io(cmd
);
793 static int sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
, bool unmap
)
795 struct scsi_device
*sdp
= cmd
->device
;
796 struct request
*rq
= cmd
->request
;
797 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
798 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
799 u32 data_len
= sdp
->sector_size
;
801 rq
->special_vec
.bv_page
= alloc_page(GFP_ATOMIC
| __GFP_ZERO
);
802 if (!rq
->special_vec
.bv_page
)
803 return BLKPREP_DEFER
;
804 rq
->special_vec
.bv_offset
= 0;
805 rq
->special_vec
.bv_len
= data_len
;
806 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
809 cmd
->cmnd
[0] = WRITE_SAME
;
811 cmd
->cmnd
[1] = 0x8; /* UNMAP */
812 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
813 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
815 cmd
->allowed
= SD_MAX_RETRIES
;
816 cmd
->transfersize
= data_len
;
817 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
818 scsi_req(rq
)->resid_len
= data_len
;
820 return scsi_init_io(cmd
);
823 static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
825 struct request
*rq
= cmd
->request
;
826 struct scsi_device
*sdp
= cmd
->device
;
827 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
828 u64 sector
= blk_rq_pos(rq
) >> (ilog2(sdp
->sector_size
) - 9);
829 u32 nr_sectors
= blk_rq_sectors(rq
) >> (ilog2(sdp
->sector_size
) - 9);
832 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
833 switch (sdkp
->zeroing_mode
) {
834 case SD_ZERO_WS16_UNMAP
:
835 ret
= sd_setup_write_same16_cmnd(cmd
, true);
837 case SD_ZERO_WS10_UNMAP
:
838 ret
= sd_setup_write_same10_cmnd(cmd
, true);
843 if (sdp
->no_write_same
)
844 return BLKPREP_INVALID
;
846 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff)
847 ret
= sd_setup_write_same16_cmnd(cmd
, false);
849 ret
= sd_setup_write_same10_cmnd(cmd
, false);
852 if (sd_is_zoned(sdkp
) && ret
== BLKPREP_OK
)
853 return sd_zbc_write_lock_zone(cmd
);
858 static void sd_config_write_same(struct scsi_disk
*sdkp
)
860 struct request_queue
*q
= sdkp
->disk
->queue
;
861 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
863 if (sdkp
->device
->no_write_same
) {
864 sdkp
->max_ws_blocks
= 0;
868 /* Some devices can not handle block counts above 0xffff despite
869 * supporting WRITE SAME(16). Consequently we default to 64k
870 * blocks per I/O unless the device explicitly advertises a
873 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
874 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
875 (u32
)SD_MAX_WS16_BLOCKS
);
876 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
877 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
878 (u32
)SD_MAX_WS10_BLOCKS
);
880 sdkp
->device
->no_write_same
= 1;
881 sdkp
->max_ws_blocks
= 0;
884 if (sdkp
->lbprz
&& sdkp
->lbpws
)
885 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
886 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
887 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
888 else if (sdkp
->max_ws_blocks
)
889 sdkp
->zeroing_mode
= SD_ZERO_WS
;
891 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
894 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
895 (logical_block_size
>> 9));
896 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
897 (logical_block_size
>> 9));
901 * sd_setup_write_same_cmnd - write the same data to multiple blocks
902 * @cmd: command to prepare
904 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
905 * the preference indicated by the target device.
907 static int sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
909 struct request
*rq
= cmd
->request
;
910 struct scsi_device
*sdp
= cmd
->device
;
911 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
912 struct bio
*bio
= rq
->bio
;
913 sector_t sector
= blk_rq_pos(rq
);
914 unsigned int nr_sectors
= blk_rq_sectors(rq
);
915 unsigned int nr_bytes
= blk_rq_bytes(rq
);
918 if (sdkp
->device
->no_write_same
)
919 return BLKPREP_INVALID
;
921 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
923 if (sd_is_zoned(sdkp
)) {
924 ret
= sd_zbc_write_lock_zone(cmd
);
925 if (ret
!= BLKPREP_OK
)
929 sector
>>= ilog2(sdp
->sector_size
) - 9;
930 nr_sectors
>>= ilog2(sdp
->sector_size
) - 9;
932 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
934 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff) {
936 cmd
->cmnd
[0] = WRITE_SAME_16
;
937 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
938 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
941 cmd
->cmnd
[0] = WRITE_SAME
;
942 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
943 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
946 cmd
->transfersize
= sdp
->sector_size
;
947 cmd
->allowed
= SD_MAX_RETRIES
;
950 * For WRITE SAME the data transferred via the DATA OUT buffer is
951 * different from the amount of data actually written to the target.
953 * We set up __data_len to the amount of data transferred via the
954 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
955 * to transfer a single sector of data first, but then reset it to
956 * the amount of data to be written right after so that the I/O path
957 * knows how much to actually write.
959 rq
->__data_len
= sdp
->sector_size
;
960 ret
= scsi_init_io(cmd
);
961 rq
->__data_len
= nr_bytes
;
963 if (sd_is_zoned(sdkp
) && ret
!= BLKPREP_OK
)
964 sd_zbc_write_unlock_zone(cmd
);
969 static int sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
971 struct request
*rq
= cmd
->request
;
973 /* flush requests don't perform I/O, zero the S/G table */
974 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
976 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
978 cmd
->transfersize
= 0;
979 cmd
->allowed
= SD_MAX_RETRIES
;
981 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
985 static int sd_setup_read_write_cmnd(struct scsi_cmnd
*SCpnt
)
987 struct request
*rq
= SCpnt
->request
;
988 struct scsi_device
*sdp
= SCpnt
->device
;
989 struct gendisk
*disk
= rq
->rq_disk
;
990 struct scsi_disk
*sdkp
= scsi_disk(disk
);
991 sector_t block
= blk_rq_pos(rq
);
993 unsigned int this_count
= blk_rq_sectors(rq
);
994 unsigned int dif
, dix
;
995 bool zoned_write
= sd_is_zoned(sdkp
) && rq_data_dir(rq
) == WRITE
;
997 unsigned char protect
;
1000 ret
= sd_zbc_write_lock_zone(SCpnt
);
1001 if (ret
!= BLKPREP_OK
)
1005 ret
= scsi_init_io(SCpnt
);
1006 if (ret
!= BLKPREP_OK
)
1008 SCpnt
= rq
->special
;
1010 /* from here on until we're complete, any goto out
1011 * is used for a killable error condition */
1015 scmd_printk(KERN_INFO
, SCpnt
,
1016 "%s: block=%llu, count=%d\n",
1017 __func__
, (unsigned long long)block
, this_count
));
1019 if (!sdp
|| !scsi_device_online(sdp
) ||
1020 block
+ blk_rq_sectors(rq
) > get_capacity(disk
)) {
1021 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1022 "Finishing %u sectors\n",
1023 blk_rq_sectors(rq
)));
1024 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1025 "Retry with 0x%p\n", SCpnt
));
1031 * quietly refuse to do anything to a changed disc until
1032 * the changed bit has been reset
1034 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
1039 * Some SD card readers can't handle multi-sector accesses which touch
1040 * the last one or two hardware sectors. Split accesses as needed.
1042 threshold
= get_capacity(disk
) - SD_LAST_BUGGY_SECTORS
*
1043 (sdp
->sector_size
/ 512);
1045 if (unlikely(sdp
->last_sector_bug
&& block
+ this_count
> threshold
)) {
1046 if (block
< threshold
) {
1047 /* Access up to the threshold but not beyond */
1048 this_count
= threshold
- block
;
1050 /* Access only a single hardware sector */
1051 this_count
= sdp
->sector_size
/ 512;
1055 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
, "block=%llu\n",
1056 (unsigned long long)block
));
1059 * If we have a 1K hardware sectorsize, prevent access to single
1060 * 512 byte sectors. In theory we could handle this - in fact
1061 * the scsi cdrom driver must be able to handle this because
1062 * we typically use 1K blocksizes, and cdroms typically have
1063 * 2K hardware sectorsizes. Of course, things are simpler
1064 * with the cdrom, since it is read-only. For performance
1065 * reasons, the filesystems should be able to handle this
1066 * and not force the scsi disk driver to use bounce buffers
1069 if (sdp
->sector_size
== 1024) {
1070 if ((block
& 1) || (blk_rq_sectors(rq
) & 1)) {
1071 scmd_printk(KERN_ERR
, SCpnt
,
1072 "Bad block number requested\n");
1076 this_count
= this_count
>> 1;
1079 if (sdp
->sector_size
== 2048) {
1080 if ((block
& 3) || (blk_rq_sectors(rq
) & 3)) {
1081 scmd_printk(KERN_ERR
, SCpnt
,
1082 "Bad block number requested\n");
1086 this_count
= this_count
>> 2;
1089 if (sdp
->sector_size
== 4096) {
1090 if ((block
& 7) || (blk_rq_sectors(rq
) & 7)) {
1091 scmd_printk(KERN_ERR
, SCpnt
,
1092 "Bad block number requested\n");
1096 this_count
= this_count
>> 3;
1099 if (rq_data_dir(rq
) == WRITE
) {
1100 SCpnt
->cmnd
[0] = WRITE_6
;
1102 if (blk_integrity_rq(rq
))
1103 sd_dif_prepare(SCpnt
);
1105 } else if (rq_data_dir(rq
) == READ
) {
1106 SCpnt
->cmnd
[0] = READ_6
;
1108 scmd_printk(KERN_ERR
, SCpnt
, "Unknown command %d\n", req_op(rq
));
1112 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1113 "%s %d/%u 512 byte blocks.\n",
1114 (rq_data_dir(rq
) == WRITE
) ?
1115 "writing" : "reading", this_count
,
1116 blk_rq_sectors(rq
)));
1118 dix
= scsi_prot_sg_count(SCpnt
);
1119 dif
= scsi_host_dif_capable(SCpnt
->device
->host
, sdkp
->protection_type
);
1122 protect
= sd_setup_protect_cmnd(SCpnt
, dix
, dif
);
1126 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1127 SCpnt
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1129 if (unlikely(SCpnt
->cmnd
== NULL
)) {
1130 ret
= BLKPREP_DEFER
;
1134 SCpnt
->cmd_len
= SD_EXT_CDB_SIZE
;
1135 memset(SCpnt
->cmnd
, 0, SCpnt
->cmd_len
);
1136 SCpnt
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1137 SCpnt
->cmnd
[7] = 0x18;
1138 SCpnt
->cmnd
[9] = (rq_data_dir(rq
) == READ
) ? READ_32
: WRITE_32
;
1139 SCpnt
->cmnd
[10] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1142 SCpnt
->cmnd
[12] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1143 SCpnt
->cmnd
[13] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1144 SCpnt
->cmnd
[14] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1145 SCpnt
->cmnd
[15] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1146 SCpnt
->cmnd
[16] = (unsigned char) (block
>> 24) & 0xff;
1147 SCpnt
->cmnd
[17] = (unsigned char) (block
>> 16) & 0xff;
1148 SCpnt
->cmnd
[18] = (unsigned char) (block
>> 8) & 0xff;
1149 SCpnt
->cmnd
[19] = (unsigned char) block
& 0xff;
1151 /* Expected Indirect LBA */
1152 SCpnt
->cmnd
[20] = (unsigned char) (block
>> 24) & 0xff;
1153 SCpnt
->cmnd
[21] = (unsigned char) (block
>> 16) & 0xff;
1154 SCpnt
->cmnd
[22] = (unsigned char) (block
>> 8) & 0xff;
1155 SCpnt
->cmnd
[23] = (unsigned char) block
& 0xff;
1157 /* Transfer length */
1158 SCpnt
->cmnd
[28] = (unsigned char) (this_count
>> 24) & 0xff;
1159 SCpnt
->cmnd
[29] = (unsigned char) (this_count
>> 16) & 0xff;
1160 SCpnt
->cmnd
[30] = (unsigned char) (this_count
>> 8) & 0xff;
1161 SCpnt
->cmnd
[31] = (unsigned char) this_count
& 0xff;
1162 } else if (sdp
->use_16_for_rw
|| (this_count
> 0xffff)) {
1163 SCpnt
->cmnd
[0] += READ_16
- READ_6
;
1164 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1165 SCpnt
->cmnd
[2] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1166 SCpnt
->cmnd
[3] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1167 SCpnt
->cmnd
[4] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1168 SCpnt
->cmnd
[5] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1169 SCpnt
->cmnd
[6] = (unsigned char) (block
>> 24) & 0xff;
1170 SCpnt
->cmnd
[7] = (unsigned char) (block
>> 16) & 0xff;
1171 SCpnt
->cmnd
[8] = (unsigned char) (block
>> 8) & 0xff;
1172 SCpnt
->cmnd
[9] = (unsigned char) block
& 0xff;
1173 SCpnt
->cmnd
[10] = (unsigned char) (this_count
>> 24) & 0xff;
1174 SCpnt
->cmnd
[11] = (unsigned char) (this_count
>> 16) & 0xff;
1175 SCpnt
->cmnd
[12] = (unsigned char) (this_count
>> 8) & 0xff;
1176 SCpnt
->cmnd
[13] = (unsigned char) this_count
& 0xff;
1177 SCpnt
->cmnd
[14] = SCpnt
->cmnd
[15] = 0;
1178 } else if ((this_count
> 0xff) || (block
> 0x1fffff) ||
1179 scsi_device_protection(SCpnt
->device
) ||
1180 SCpnt
->device
->use_10_for_rw
) {
1181 SCpnt
->cmnd
[0] += READ_10
- READ_6
;
1182 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1183 SCpnt
->cmnd
[2] = (unsigned char) (block
>> 24) & 0xff;
1184 SCpnt
->cmnd
[3] = (unsigned char) (block
>> 16) & 0xff;
1185 SCpnt
->cmnd
[4] = (unsigned char) (block
>> 8) & 0xff;
1186 SCpnt
->cmnd
[5] = (unsigned char) block
& 0xff;
1187 SCpnt
->cmnd
[6] = SCpnt
->cmnd
[9] = 0;
1188 SCpnt
->cmnd
[7] = (unsigned char) (this_count
>> 8) & 0xff;
1189 SCpnt
->cmnd
[8] = (unsigned char) this_count
& 0xff;
1191 if (unlikely(rq
->cmd_flags
& REQ_FUA
)) {
1193 * This happens only if this drive failed
1194 * 10byte rw command with ILLEGAL_REQUEST
1195 * during operation and thus turned off
1198 scmd_printk(KERN_ERR
, SCpnt
,
1199 "FUA write on READ/WRITE(6) drive\n");
1203 SCpnt
->cmnd
[1] |= (unsigned char) ((block
>> 16) & 0x1f);
1204 SCpnt
->cmnd
[2] = (unsigned char) ((block
>> 8) & 0xff);
1205 SCpnt
->cmnd
[3] = (unsigned char) block
& 0xff;
1206 SCpnt
->cmnd
[4] = (unsigned char) this_count
;
1209 SCpnt
->sdb
.length
= this_count
* sdp
->sector_size
;
1212 * We shouldn't disconnect in the middle of a sector, so with a dumb
1213 * host adapter, it's safe to assume that we can at least transfer
1214 * this many bytes between each connect / disconnect.
1216 SCpnt
->transfersize
= sdp
->sector_size
;
1217 SCpnt
->underflow
= this_count
<< 9;
1218 SCpnt
->allowed
= SD_MAX_RETRIES
;
1221 * This indicates that the command is ready from our end to be
1226 if (zoned_write
&& ret
!= BLKPREP_OK
)
1227 sd_zbc_write_unlock_zone(SCpnt
);
1232 static int sd_init_command(struct scsi_cmnd
*cmd
)
1234 struct request
*rq
= cmd
->request
;
1236 switch (req_op(rq
)) {
1237 case REQ_OP_DISCARD
:
1238 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1240 return sd_setup_unmap_cmnd(cmd
);
1242 return sd_setup_write_same16_cmnd(cmd
, true);
1244 return sd_setup_write_same10_cmnd(cmd
, true);
1246 return sd_setup_write_same10_cmnd(cmd
, false);
1248 return BLKPREP_INVALID
;
1250 case REQ_OP_WRITE_ZEROES
:
1251 return sd_setup_write_zeroes_cmnd(cmd
);
1252 case REQ_OP_WRITE_SAME
:
1253 return sd_setup_write_same_cmnd(cmd
);
1255 return sd_setup_flush_cmnd(cmd
);
1258 return sd_setup_read_write_cmnd(cmd
);
1259 case REQ_OP_ZONE_REPORT
:
1260 return sd_zbc_setup_report_cmnd(cmd
);
1261 case REQ_OP_ZONE_RESET
:
1262 return sd_zbc_setup_reset_cmnd(cmd
);
1268 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1270 struct request
*rq
= SCpnt
->request
;
1272 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1273 __free_page(rq
->special_vec
.bv_page
);
1275 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1276 mempool_free(SCpnt
->cmnd
, sd_cdb_pool
);
1283 * sd_open - open a scsi disk device
1284 * @bdev: Block device of the scsi disk to open
1285 * @mode: FMODE_* mask
1287 * Returns 0 if successful. Returns a negated errno value in case
1290 * Note: This can be called from a user context (e.g. fsck(1) )
1291 * or from within the kernel (e.g. as a result of a mount(1) ).
1292 * In the latter case @inode and @filp carry an abridged amount
1293 * of information as noted above.
1295 * Locking: called with bdev->bd_mutex held.
1297 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1299 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1300 struct scsi_device
*sdev
;
1306 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1308 sdev
= sdkp
->device
;
1311 * If the device is in error recovery, wait until it is done.
1312 * If the device is offline, then disallow any access to it.
1315 if (!scsi_block_when_processing_errors(sdev
))
1318 if (sdev
->removable
|| sdkp
->write_prot
)
1319 check_disk_change(bdev
);
1322 * If the drive is empty, just let the open fail.
1324 retval
= -ENOMEDIUM
;
1325 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1329 * If the device has the write protect tab set, have the open fail
1330 * if the user expects to be able to write to the thing.
1333 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1337 * It is possible that the disk changing stuff resulted in
1338 * the device being taken offline. If this is the case,
1339 * report this to the user, and don't pretend that the
1340 * open actually succeeded.
1343 if (!scsi_device_online(sdev
))
1346 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1347 if (scsi_block_when_processing_errors(sdev
))
1348 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1354 scsi_disk_put(sdkp
);
1359 * sd_release - invoked when the (last) close(2) is called on this
1361 * @disk: disk to release
1362 * @mode: FMODE_* mask
1366 * Note: may block (uninterruptible) if error recovery is underway
1369 * Locking: called with bdev->bd_mutex held.
1371 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1373 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1374 struct scsi_device
*sdev
= sdkp
->device
;
1376 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1378 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1379 if (scsi_block_when_processing_errors(sdev
))
1380 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1384 * XXX and what if there are packets in flight and this close()
1385 * XXX is followed by a "rmmod sd_mod"?
1388 scsi_disk_put(sdkp
);
1391 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1393 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1394 struct scsi_device
*sdp
= sdkp
->device
;
1395 struct Scsi_Host
*host
= sdp
->host
;
1396 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1399 /* default to most commonly used values */
1400 diskinfo
[0] = 0x40; /* 1 << 6 */
1401 diskinfo
[1] = 0x20; /* 1 << 5 */
1402 diskinfo
[2] = capacity
>> 11;
1404 /* override with calculated, extended default, or driver values */
1405 if (host
->hostt
->bios_param
)
1406 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1408 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1410 geo
->heads
= diskinfo
[0];
1411 geo
->sectors
= diskinfo
[1];
1412 geo
->cylinders
= diskinfo
[2];
1417 * sd_ioctl - process an ioctl
1418 * @bdev: target block device
1419 * @mode: FMODE_* mask
1420 * @cmd: ioctl command number
1421 * @arg: this is third argument given to ioctl(2) system call.
1422 * Often contains a pointer.
1424 * Returns 0 if successful (some ioctls return positive numbers on
1425 * success as well). Returns a negated errno value in case of error.
1427 * Note: most ioctls are forward onto the block subsystem or further
1428 * down in the scsi subsystem.
1430 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1431 unsigned int cmd
, unsigned long arg
)
1433 struct gendisk
*disk
= bdev
->bd_disk
;
1434 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1435 struct scsi_device
*sdp
= sdkp
->device
;
1436 void __user
*p
= (void __user
*)arg
;
1439 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1440 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1442 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1447 * If we are in the middle of error recovery, don't let anyone
1448 * else try and use this device. Also, if error recovery fails, it
1449 * may try and take the device offline, in which case all further
1450 * access to the device is prohibited.
1452 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1453 (mode
& FMODE_NDELAY
) != 0);
1458 * Send SCSI addressing ioctls directly to mid level, send other
1459 * ioctls to block level and then onto mid level if they can't be
1463 case SCSI_IOCTL_GET_IDLUN
:
1464 case SCSI_IOCTL_GET_BUS_NUMBER
:
1465 error
= scsi_ioctl(sdp
, cmd
, p
);
1468 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1469 if (error
!= -ENOTTY
)
1471 error
= scsi_ioctl(sdp
, cmd
, p
);
1478 static void set_media_not_present(struct scsi_disk
*sdkp
)
1480 if (sdkp
->media_present
)
1481 sdkp
->device
->changed
= 1;
1483 if (sdkp
->device
->removable
) {
1484 sdkp
->media_present
= 0;
1489 static int media_not_present(struct scsi_disk
*sdkp
,
1490 struct scsi_sense_hdr
*sshdr
)
1492 if (!scsi_sense_valid(sshdr
))
1495 /* not invoked for commands that could return deferred errors */
1496 switch (sshdr
->sense_key
) {
1497 case UNIT_ATTENTION
:
1499 /* medium not present */
1500 if (sshdr
->asc
== 0x3A) {
1501 set_media_not_present(sdkp
);
1509 * sd_check_events - check media events
1510 * @disk: kernel device descriptor
1511 * @clearing: disk events currently being cleared
1513 * Returns mask of DISK_EVENT_*.
1515 * Note: this function is invoked from the block subsystem.
1517 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1519 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1520 struct scsi_device
*sdp
;
1527 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1530 * If the device is offline, don't send any commands - just pretend as
1531 * if the command failed. If the device ever comes back online, we
1532 * can deal with it then. It is only because of unrecoverable errors
1533 * that we would ever take a device offline in the first place.
1535 if (!scsi_device_online(sdp
)) {
1536 set_media_not_present(sdkp
);
1541 * Using TEST_UNIT_READY enables differentiation between drive with
1542 * no cartridge loaded - NOT READY, drive with changed cartridge -
1543 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1545 * Drives that auto spin down. eg iomega jaz 1G, will be started
1546 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1547 * sd_revalidate() is called.
1549 if (scsi_block_when_processing_errors(sdp
)) {
1550 struct scsi_sense_hdr sshdr
= { 0, };
1552 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1555 /* failed to execute TUR, assume media not present */
1556 if (host_byte(retval
)) {
1557 set_media_not_present(sdkp
);
1561 if (media_not_present(sdkp
, &sshdr
))
1566 * For removable scsi disk we have to recognise the presence
1567 * of a disk in the drive.
1569 if (!sdkp
->media_present
)
1571 sdkp
->media_present
= 1;
1574 * sdp->changed is set under the following conditions:
1576 * Medium present state has changed in either direction.
1577 * Device has indicated UNIT_ATTENTION.
1579 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1581 scsi_disk_put(sdkp
);
1585 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1588 struct scsi_device
*sdp
= sdkp
->device
;
1589 const int timeout
= sdp
->request_queue
->rq_timeout
1590 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1591 struct scsi_sense_hdr my_sshdr
;
1593 if (!scsi_device_online(sdp
))
1596 /* caller might not be interested in sense, but we need it */
1600 for (retries
= 3; retries
> 0; --retries
) {
1601 unsigned char cmd
[10] = { 0 };
1603 cmd
[0] = SYNCHRONIZE_CACHE
;
1605 * Leave the rest of the command zero to indicate
1608 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1609 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1615 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1617 if (driver_byte(res
) & DRIVER_SENSE
)
1618 sd_print_sense_hdr(sdkp
, sshdr
);
1620 /* we need to evaluate the error return */
1621 if (scsi_sense_valid(sshdr
) &&
1622 (sshdr
->asc
== 0x3a || /* medium not present */
1623 sshdr
->asc
== 0x20)) /* invalid command */
1624 /* this is no error here */
1627 switch (host_byte(res
)) {
1628 /* ignore errors due to racing a disconnection */
1629 case DID_BAD_TARGET
:
1630 case DID_NO_CONNECT
:
1632 /* signal the upper layer it might try again */
1636 case DID_SOFT_ERROR
:
1645 static void sd_rescan(struct device
*dev
)
1647 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1649 revalidate_disk(sdkp
->disk
);
1653 #ifdef CONFIG_COMPAT
1655 * This gets directly called from VFS. When the ioctl
1656 * is not recognized we go back to the other translation paths.
1658 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1659 unsigned int cmd
, unsigned long arg
)
1661 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1664 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1665 (mode
& FMODE_NDELAY
) != 0);
1670 * Let the static ioctl translation table take care of it.
1672 if (!sdev
->host
->hostt
->compat_ioctl
)
1673 return -ENOIOCTLCMD
;
1674 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1678 static char sd_pr_type(enum pr_type type
)
1681 case PR_WRITE_EXCLUSIVE
:
1683 case PR_EXCLUSIVE_ACCESS
:
1685 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1687 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1689 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1691 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1698 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1699 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1701 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1702 struct scsi_sense_hdr sshdr
;
1704 u8 cmd
[16] = { 0, };
1705 u8 data
[24] = { 0, };
1707 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1710 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1712 put_unaligned_be64(key
, &data
[0]);
1713 put_unaligned_be64(sa_key
, &data
[8]);
1716 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1717 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1719 if ((driver_byte(result
) & DRIVER_SENSE
) &&
1720 (scsi_sense_valid(&sshdr
))) {
1721 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1722 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1728 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1731 if (flags
& ~PR_FL_IGNORE_KEY
)
1733 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1734 old_key
, new_key
, 0,
1735 (1 << 0) /* APTPL */);
1738 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1743 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1746 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1748 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1751 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1752 enum pr_type type
, bool abort
)
1754 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1755 sd_pr_type(type
), 0);
1758 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1760 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1763 static const struct pr_ops sd_pr_ops
= {
1764 .pr_register
= sd_pr_register
,
1765 .pr_reserve
= sd_pr_reserve
,
1766 .pr_release
= sd_pr_release
,
1767 .pr_preempt
= sd_pr_preempt
,
1768 .pr_clear
= sd_pr_clear
,
1771 static const struct block_device_operations sd_fops
= {
1772 .owner
= THIS_MODULE
,
1774 .release
= sd_release
,
1776 .getgeo
= sd_getgeo
,
1777 #ifdef CONFIG_COMPAT
1778 .compat_ioctl
= sd_compat_ioctl
,
1780 .check_events
= sd_check_events
,
1781 .revalidate_disk
= sd_revalidate_disk
,
1782 .unlock_native_capacity
= sd_unlock_native_capacity
,
1783 .pr_ops
= &sd_pr_ops
,
1787 * sd_eh_reset - reset error handling callback
1788 * @scmd: sd-issued command that has failed
1790 * This function is called by the SCSI midlayer before starting
1791 * SCSI EH. When counting medium access failures we have to be
1792 * careful to register it only only once per device and SCSI EH run;
1793 * there might be several timed out commands which will cause the
1794 * 'max_medium_access_timeouts' counter to trigger after the first
1795 * SCSI EH run already and set the device to offline.
1796 * So this function resets the internal counter before starting SCSI EH.
1798 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1800 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1802 /* New SCSI EH run, reset gate variable */
1803 sdkp
->ignore_medium_access_errors
= false;
1807 * sd_eh_action - error handling callback
1808 * @scmd: sd-issued command that has failed
1809 * @eh_disp: The recovery disposition suggested by the midlayer
1811 * This function is called by the SCSI midlayer upon completion of an
1812 * error test command (currently TEST UNIT READY). The result of sending
1813 * the eh command is passed in eh_disp. We're looking for devices that
1814 * fail medium access commands but are OK with non access commands like
1815 * test unit ready (so wrongly see the device as having a successful
1818 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1820 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1822 if (!scsi_device_online(scmd
->device
) ||
1823 !scsi_medium_access_command(scmd
) ||
1824 host_byte(scmd
->result
) != DID_TIME_OUT
||
1829 * The device has timed out executing a medium access command.
1830 * However, the TEST UNIT READY command sent during error
1831 * handling completed successfully. Either the device is in the
1832 * process of recovering or has it suffered an internal failure
1833 * that prevents access to the storage medium.
1835 if (!sdkp
->ignore_medium_access_errors
) {
1836 sdkp
->medium_access_timed_out
++;
1837 sdkp
->ignore_medium_access_errors
= true;
1841 * If the device keeps failing read/write commands but TEST UNIT
1842 * READY always completes successfully we assume that medium
1843 * access is no longer possible and take the device offline.
1845 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1846 scmd_printk(KERN_ERR
, scmd
,
1847 "Medium access timeout failure. Offlining disk!\n");
1848 scsi_device_set_state(scmd
->device
, SDEV_OFFLINE
);
1856 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1858 struct request
*req
= scmd
->request
;
1859 struct scsi_device
*sdev
= scmd
->device
;
1860 unsigned int transferred
, good_bytes
;
1861 u64 start_lba
, end_lba
, bad_lba
;
1864 * Some commands have a payload smaller than the device logical
1865 * block size (e.g. INQUIRY on a 4K disk).
1867 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1870 /* Check if we have a 'bad_lba' information */
1871 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1872 SCSI_SENSE_BUFFERSIZE
,
1877 * If the bad lba was reported incorrectly, we have no idea where
1880 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1881 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1882 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1886 * resid is optional but mostly filled in. When it's unused,
1887 * its value is zero, so we assume the whole buffer transferred
1889 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1891 /* This computation should always be done in terms of the
1892 * resolution of the device's medium.
1894 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1896 return min(good_bytes
, transferred
);
1900 * sd_done - bottom half handler: called when the lower level
1901 * driver has completed (successfully or otherwise) a scsi command.
1902 * @SCpnt: mid-level's per command structure.
1904 * Note: potentially run from within an ISR. Must not block.
1906 static int sd_done(struct scsi_cmnd
*SCpnt
)
1908 int result
= SCpnt
->result
;
1909 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1910 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1912 struct scsi_sense_hdr sshdr
;
1913 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1914 struct request
*req
= SCpnt
->request
;
1915 int sense_valid
= 0;
1916 int sense_deferred
= 0;
1918 switch (req_op(req
)) {
1919 case REQ_OP_DISCARD
:
1920 case REQ_OP_WRITE_ZEROES
:
1921 case REQ_OP_WRITE_SAME
:
1922 case REQ_OP_ZONE_RESET
:
1924 good_bytes
= blk_rq_bytes(req
);
1925 scsi_set_resid(SCpnt
, 0);
1928 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1931 case REQ_OP_ZONE_REPORT
:
1933 good_bytes
= scsi_bufflen(SCpnt
)
1934 - scsi_get_resid(SCpnt
);
1935 scsi_set_resid(SCpnt
, 0);
1938 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1943 * In case of bogus fw or device, we could end up having
1944 * an unaligned partial completion. Check this here and force
1947 resid
= scsi_get_resid(SCpnt
);
1948 if (resid
& (sector_size
- 1)) {
1949 sd_printk(KERN_INFO
, sdkp
,
1950 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1951 resid
, sector_size
);
1952 resid
= min(scsi_bufflen(SCpnt
),
1953 round_up(resid
, sector_size
));
1954 scsi_set_resid(SCpnt
, resid
);
1959 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
1961 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
1963 sdkp
->medium_access_timed_out
= 0;
1965 if (driver_byte(result
) != DRIVER_SENSE
&&
1966 (!sense_valid
|| sense_deferred
))
1969 switch (sshdr
.sense_key
) {
1970 case HARDWARE_ERROR
:
1972 good_bytes
= sd_completed_bytes(SCpnt
);
1974 case RECOVERED_ERROR
:
1975 good_bytes
= scsi_bufflen(SCpnt
);
1978 /* This indicates a false check condition, so ignore it. An
1979 * unknown amount of data was transferred so treat it as an
1983 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
1985 case ABORTED_COMMAND
:
1986 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
1987 good_bytes
= sd_completed_bytes(SCpnt
);
1989 case ILLEGAL_REQUEST
:
1990 switch (sshdr
.asc
) {
1991 case 0x10: /* DIX: Host detected corruption */
1992 good_bytes
= sd_completed_bytes(SCpnt
);
1994 case 0x20: /* INVALID COMMAND OPCODE */
1995 case 0x24: /* INVALID FIELD IN CDB */
1996 switch (SCpnt
->cmnd
[0]) {
1998 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2002 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2003 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2005 sdkp
->device
->no_write_same
= 1;
2006 sd_config_write_same(sdkp
);
2007 req
->__data_len
= blk_rq_bytes(req
);
2008 req
->rq_flags
|= RQF_QUIET
;
2019 if (sd_is_zoned(sdkp
))
2020 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2022 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2023 "sd_done: completed %d of %d bytes\n",
2024 good_bytes
, scsi_bufflen(SCpnt
)));
2026 if (rq_data_dir(SCpnt
->request
) == READ
&& scsi_prot_sg_count(SCpnt
))
2027 sd_dif_complete(SCpnt
, good_bytes
);
2033 * spinup disk - called only in sd_revalidate_disk()
2036 sd_spinup_disk(struct scsi_disk
*sdkp
)
2038 unsigned char cmd
[10];
2039 unsigned long spintime_expire
= 0;
2040 int retries
, spintime
;
2041 unsigned int the_result
;
2042 struct scsi_sense_hdr sshdr
;
2043 int sense_valid
= 0;
2047 /* Spin up drives, as required. Only do this at boot time */
2048 /* Spinup needs to be done for module loads too. */
2053 cmd
[0] = TEST_UNIT_READY
;
2054 memset((void *) &cmd
[1], 0, 9);
2056 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2059 SD_MAX_RETRIES
, NULL
);
2062 * If the drive has indicated to us that it
2063 * doesn't have any media in it, don't bother
2064 * with any more polling.
2066 if (media_not_present(sdkp
, &sshdr
))
2070 sense_valid
= scsi_sense_valid(&sshdr
);
2072 } while (retries
< 3 &&
2073 (!scsi_status_is_good(the_result
) ||
2074 ((driver_byte(the_result
) & DRIVER_SENSE
) &&
2075 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2077 if ((driver_byte(the_result
) & DRIVER_SENSE
) == 0) {
2078 /* no sense, TUR either succeeded or failed
2079 * with a status error */
2080 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2081 sd_print_result(sdkp
, "Test Unit Ready failed",
2088 * The device does not want the automatic start to be issued.
2090 if (sdkp
->device
->no_start_on_add
)
2093 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2094 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2095 break; /* manual intervention required */
2096 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2097 break; /* standby */
2098 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2099 break; /* unavailable */
2101 * Issue command to spin up drive when not ready
2104 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2105 cmd
[0] = START_STOP
;
2106 cmd
[1] = 1; /* Return immediately */
2107 memset((void *) &cmd
[2], 0, 8);
2108 cmd
[4] = 1; /* Start spin cycle */
2109 if (sdkp
->device
->start_stop_pwr_cond
)
2111 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2113 SD_TIMEOUT
, SD_MAX_RETRIES
,
2115 spintime_expire
= jiffies
+ 100 * HZ
;
2118 /* Wait 1 second for next try */
2123 * Wait for USB flash devices with slow firmware.
2124 * Yes, this sense key/ASC combination shouldn't
2125 * occur here. It's characteristic of these devices.
2127 } else if (sense_valid
&&
2128 sshdr
.sense_key
== UNIT_ATTENTION
&&
2129 sshdr
.asc
== 0x28) {
2131 spintime_expire
= jiffies
+ 5 * HZ
;
2134 /* Wait 1 second for next try */
2137 /* we don't understand the sense code, so it's
2138 * probably pointless to loop */
2140 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2141 sd_print_sense_hdr(sdkp
, &sshdr
);
2146 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2149 if (scsi_status_is_good(the_result
))
2152 printk("not responding...\n");
2157 * Determine whether disk supports Data Integrity Field.
2159 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2161 struct scsi_device
*sdp
= sdkp
->device
;
2165 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2168 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2170 if (type
> T10_PI_TYPE3_PROTECTION
)
2172 else if (scsi_host_dif_capable(sdp
->host
, type
))
2175 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2178 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2179 " protection type %u. Disabling disk!\n",
2183 sd_printk(KERN_NOTICE
, sdkp
,
2184 "Enabling DIF Type %u protection\n", type
);
2187 sd_printk(KERN_NOTICE
, sdkp
,
2188 "Disabling DIF Type %u protection\n", type
);
2192 sdkp
->protection_type
= type
;
2197 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2198 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2201 if (driver_byte(the_result
) & DRIVER_SENSE
)
2202 sd_print_sense_hdr(sdkp
, sshdr
);
2204 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2207 * Set dirty bit for removable devices if not ready -
2208 * sometimes drives will not report this properly.
2210 if (sdp
->removable
&&
2211 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2212 set_media_not_present(sdkp
);
2215 * We used to set media_present to 0 here to indicate no media
2216 * in the drive, but some drives fail read capacity even with
2217 * media present, so we can't do that.
2219 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2223 #if RC16_LEN > SD_BUF_SIZE
2224 #error RC16_LEN must not be more than SD_BUF_SIZE
2227 #define READ_CAPACITY_RETRIES_ON_RESET 10
2230 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2231 * and the reported logical block size is bigger than 512 bytes. Note
2232 * that last_sector is a u64 and therefore logical_to_sectors() is not
2235 static bool sd_addressable_capacity(u64 lba
, unsigned int sector_size
)
2237 u64 last_sector
= (lba
+ 1ULL) << (ilog2(sector_size
) - 9);
2239 if (sizeof(sector_t
) == 4 && last_sector
> U32_MAX
)
2245 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2246 unsigned char *buffer
)
2248 unsigned char cmd
[16];
2249 struct scsi_sense_hdr sshdr
;
2250 int sense_valid
= 0;
2252 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2253 unsigned int alignment
;
2254 unsigned long long lba
;
2255 unsigned sector_size
;
2257 if (sdp
->no_read_capacity_16
)
2262 cmd
[0] = SERVICE_ACTION_IN_16
;
2263 cmd
[1] = SAI_READ_CAPACITY_16
;
2265 memset(buffer
, 0, RC16_LEN
);
2267 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2268 buffer
, RC16_LEN
, &sshdr
,
2269 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2271 if (media_not_present(sdkp
, &sshdr
))
2275 sense_valid
= scsi_sense_valid(&sshdr
);
2277 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2278 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2280 /* Invalid Command Operation Code or
2281 * Invalid Field in CDB, just retry
2282 * silently with RC10 */
2285 sshdr
.sense_key
== UNIT_ATTENTION
&&
2286 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2287 /* Device reset might occur several times,
2288 * give it one more chance */
2289 if (--reset_retries
> 0)
2294 } while (the_result
&& retries
);
2297 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2298 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2302 sector_size
= get_unaligned_be32(&buffer
[8]);
2303 lba
= get_unaligned_be64(&buffer
[0]);
2305 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2310 if (!sd_addressable_capacity(lba
, sector_size
)) {
2311 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2312 "kernel compiled with support for large block "
2318 /* Logical blocks per physical block exponent */
2319 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2322 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2324 /* Lowest aligned logical block */
2325 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2326 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2327 if (alignment
&& sdkp
->first_scan
)
2328 sd_printk(KERN_NOTICE
, sdkp
,
2329 "physical block alignment offset: %u\n", alignment
);
2331 if (buffer
[14] & 0x80) { /* LBPME */
2334 if (buffer
[14] & 0x40) /* LBPRZ */
2337 sd_config_discard(sdkp
, SD_LBP_WS16
);
2340 sdkp
->capacity
= lba
+ 1;
2344 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2345 unsigned char *buffer
)
2347 unsigned char cmd
[16];
2348 struct scsi_sense_hdr sshdr
;
2349 int sense_valid
= 0;
2351 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2353 unsigned sector_size
;
2356 cmd
[0] = READ_CAPACITY
;
2357 memset(&cmd
[1], 0, 9);
2358 memset(buffer
, 0, 8);
2360 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2362 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2364 if (media_not_present(sdkp
, &sshdr
))
2368 sense_valid
= scsi_sense_valid(&sshdr
);
2370 sshdr
.sense_key
== UNIT_ATTENTION
&&
2371 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2372 /* Device reset might occur several times,
2373 * give it one more chance */
2374 if (--reset_retries
> 0)
2379 } while (the_result
&& retries
);
2382 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2383 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2387 sector_size
= get_unaligned_be32(&buffer
[4]);
2388 lba
= get_unaligned_be32(&buffer
[0]);
2390 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2391 /* Some buggy (usb cardreader) devices return an lba of
2392 0xffffffff when the want to report a size of 0 (with
2393 which they really mean no media is present) */
2395 sdkp
->physical_block_size
= sector_size
;
2399 if (!sd_addressable_capacity(lba
, sector_size
)) {
2400 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2401 "kernel compiled with support for large block "
2407 sdkp
->capacity
= lba
+ 1;
2408 sdkp
->physical_block_size
= sector_size
;
2412 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2414 if (sdp
->host
->max_cmd_len
< 16)
2416 if (sdp
->try_rc_10_first
)
2418 if (sdp
->scsi_level
> SCSI_SPC_2
)
2420 if (scsi_device_protection(sdp
))
2426 * read disk capacity
2429 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2432 struct scsi_device
*sdp
= sdkp
->device
;
2434 if (sd_try_rc16_first(sdp
)) {
2435 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2436 if (sector_size
== -EOVERFLOW
)
2438 if (sector_size
== -ENODEV
)
2440 if (sector_size
< 0)
2441 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2442 if (sector_size
< 0)
2445 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2446 if (sector_size
== -EOVERFLOW
)
2448 if (sector_size
< 0)
2450 if ((sizeof(sdkp
->capacity
) > 4) &&
2451 (sdkp
->capacity
> 0xffffffffULL
)) {
2452 int old_sector_size
= sector_size
;
2453 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2454 "Trying to use READ CAPACITY(16).\n");
2455 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2456 if (sector_size
< 0) {
2457 sd_printk(KERN_NOTICE
, sdkp
,
2458 "Using 0xffffffff as device size\n");
2459 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2460 sector_size
= old_sector_size
;
2466 /* Some devices are known to return the total number of blocks,
2467 * not the highest block number. Some devices have versions
2468 * which do this and others which do not. Some devices we might
2469 * suspect of doing this but we don't know for certain.
2471 * If we know the reported capacity is wrong, decrement it. If
2472 * we can only guess, then assume the number of blocks is even
2473 * (usually true but not always) and err on the side of lowering
2476 if (sdp
->fix_capacity
||
2477 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2478 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2479 "from its reported value: %llu\n",
2480 (unsigned long long) sdkp
->capacity
);
2485 if (sector_size
== 0) {
2487 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2491 if (sector_size
!= 512 &&
2492 sector_size
!= 1024 &&
2493 sector_size
!= 2048 &&
2494 sector_size
!= 4096) {
2495 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2498 * The user might want to re-format the drive with
2499 * a supported sectorsize. Once this happens, it
2500 * would be relatively trivial to set the thing up.
2501 * For this reason, we leave the thing in the table.
2505 * set a bogus sector size so the normal read/write
2506 * logic in the block layer will eventually refuse any
2507 * request on this device without tripping over power
2508 * of two sector size assumptions
2512 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2513 blk_queue_physical_block_size(sdp
->request_queue
,
2514 sdkp
->physical_block_size
);
2515 sdkp
->device
->sector_size
= sector_size
;
2517 if (sdkp
->capacity
> 0xffffffff)
2518 sdp
->use_16_for_rw
= 1;
2523 * Print disk capacity
2526 sd_print_capacity(struct scsi_disk
*sdkp
,
2527 sector_t old_capacity
)
2529 int sector_size
= sdkp
->device
->sector_size
;
2530 char cap_str_2
[10], cap_str_10
[10];
2532 string_get_size(sdkp
->capacity
, sector_size
,
2533 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2534 string_get_size(sdkp
->capacity
, sector_size
,
2535 STRING_UNITS_10
, cap_str_10
,
2536 sizeof(cap_str_10
));
2538 if (sdkp
->first_scan
|| old_capacity
!= sdkp
->capacity
) {
2539 sd_printk(KERN_NOTICE
, sdkp
,
2540 "%llu %d-byte logical blocks: (%s/%s)\n",
2541 (unsigned long long)sdkp
->capacity
,
2542 sector_size
, cap_str_10
, cap_str_2
);
2544 if (sdkp
->physical_block_size
!= sector_size
)
2545 sd_printk(KERN_NOTICE
, sdkp
,
2546 "%u-byte physical blocks\n",
2547 sdkp
->physical_block_size
);
2549 sd_zbc_print_zones(sdkp
);
2553 /* called with buffer of length 512 */
2555 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2556 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2557 struct scsi_sense_hdr
*sshdr
)
2559 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2560 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2565 * read write protect setting, if possible - called only in sd_revalidate_disk()
2566 * called with buffer of length SD_BUF_SIZE
2569 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2572 struct scsi_device
*sdp
= sdkp
->device
;
2573 struct scsi_mode_data data
;
2574 int old_wp
= sdkp
->write_prot
;
2576 set_disk_ro(sdkp
->disk
, 0);
2577 if (sdp
->skip_ms_page_3f
) {
2578 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2582 if (sdp
->use_192_bytes_for_3f
) {
2583 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2586 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2587 * We have to start carefully: some devices hang if we ask
2588 * for more than is available.
2590 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2593 * Second attempt: ask for page 0 When only page 0 is
2594 * implemented, a request for page 3F may return Sense Key
2595 * 5: Illegal Request, Sense Code 24: Invalid field in
2598 if (!scsi_status_is_good(res
))
2599 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2602 * Third attempt: ask 255 bytes, as we did earlier.
2604 if (!scsi_status_is_good(res
))
2605 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2609 if (!scsi_status_is_good(res
)) {
2610 sd_first_printk(KERN_WARNING
, sdkp
,
2611 "Test WP failed, assume Write Enabled\n");
2613 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2614 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2615 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2616 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2617 sdkp
->write_prot
? "on" : "off");
2618 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2624 * sd_read_cache_type - called only from sd_revalidate_disk()
2625 * called with buffer of length SD_BUF_SIZE
2628 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2631 struct scsi_device
*sdp
= sdkp
->device
;
2636 struct scsi_mode_data data
;
2637 struct scsi_sense_hdr sshdr
;
2638 int old_wce
= sdkp
->WCE
;
2639 int old_rcd
= sdkp
->RCD
;
2640 int old_dpofua
= sdkp
->DPOFUA
;
2643 if (sdkp
->cache_override
)
2647 if (sdp
->skip_ms_page_8
) {
2648 if (sdp
->type
== TYPE_RBC
)
2651 if (sdp
->skip_ms_page_3f
)
2654 if (sdp
->use_192_bytes_for_3f
)
2658 } else if (sdp
->type
== TYPE_RBC
) {
2666 /* cautiously ask */
2667 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2670 if (!scsi_status_is_good(res
))
2673 if (!data
.header_length
) {
2676 sd_first_printk(KERN_ERR
, sdkp
,
2677 "Missing header in MODE_SENSE response\n");
2680 /* that went OK, now ask for the proper length */
2684 * We're only interested in the first three bytes, actually.
2685 * But the data cache page is defined for the first 20.
2689 else if (len
> SD_BUF_SIZE
) {
2690 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2691 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2694 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2698 if (len
> first_len
)
2699 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2702 if (scsi_status_is_good(res
)) {
2703 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2705 while (offset
< len
) {
2706 u8 page_code
= buffer
[offset
] & 0x3F;
2707 u8 spf
= buffer
[offset
] & 0x40;
2709 if (page_code
== 8 || page_code
== 6) {
2710 /* We're interested only in the first 3 bytes.
2712 if (len
- offset
<= 2) {
2713 sd_first_printk(KERN_ERR
, sdkp
,
2714 "Incomplete mode parameter "
2718 modepage
= page_code
;
2722 /* Go to the next page */
2723 if (spf
&& len
- offset
> 3)
2724 offset
+= 4 + (buffer
[offset
+2] << 8) +
2726 else if (!spf
&& len
- offset
> 1)
2727 offset
+= 2 + buffer
[offset
+1];
2729 sd_first_printk(KERN_ERR
, sdkp
,
2731 "parameter data\n");
2737 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2741 if (modepage
== 8) {
2742 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2743 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2745 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2749 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2750 if (sdp
->broken_fua
) {
2751 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2753 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2754 !sdkp
->device
->use_16_for_rw
) {
2755 sd_first_printk(KERN_NOTICE
, sdkp
,
2756 "Uses READ/WRITE(6), disabling FUA\n");
2760 /* No cache flush allowed for write protected devices */
2761 if (sdkp
->WCE
&& sdkp
->write_prot
)
2764 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2765 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2766 sd_printk(KERN_NOTICE
, sdkp
,
2767 "Write cache: %s, read cache: %s, %s\n",
2768 sdkp
->WCE
? "enabled" : "disabled",
2769 sdkp
->RCD
? "disabled" : "enabled",
2770 sdkp
->DPOFUA
? "supports DPO and FUA"
2771 : "doesn't support DPO or FUA");
2777 if (scsi_sense_valid(&sshdr
) &&
2778 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2779 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2780 /* Invalid field in CDB */
2781 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2783 sd_first_printk(KERN_ERR
, sdkp
,
2784 "Asking for cache data failed\n");
2787 if (sdp
->wce_default_on
) {
2788 sd_first_printk(KERN_NOTICE
, sdkp
,
2789 "Assuming drive cache: write back\n");
2792 sd_first_printk(KERN_ERR
, sdkp
,
2793 "Assuming drive cache: write through\n");
2801 * The ATO bit indicates whether the DIF application tag is available
2802 * for use by the operating system.
2804 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2807 struct scsi_device
*sdp
= sdkp
->device
;
2808 struct scsi_mode_data data
;
2809 struct scsi_sense_hdr sshdr
;
2811 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2814 if (sdkp
->protection_type
== 0)
2817 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2818 SD_MAX_RETRIES
, &data
, &sshdr
);
2820 if (!scsi_status_is_good(res
) || !data
.header_length
||
2822 sd_first_printk(KERN_WARNING
, sdkp
,
2823 "getting Control mode page failed, assume no ATO\n");
2825 if (scsi_sense_valid(&sshdr
))
2826 sd_print_sense_hdr(sdkp
, &sshdr
);
2831 offset
= data
.header_length
+ data
.block_descriptor_length
;
2833 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2834 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2838 if ((buffer
[offset
+ 5] & 0x80) == 0)
2847 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2848 * @sdkp: disk to query
2850 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2852 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2853 const int vpd_len
= 64;
2854 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2857 /* Block Limits VPD */
2858 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2861 blk_queue_io_min(sdkp
->disk
->queue
,
2862 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2864 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2865 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2867 if (buffer
[3] == 0x3c) {
2868 unsigned int lba_count
, desc_count
;
2870 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2875 lba_count
= get_unaligned_be32(&buffer
[20]);
2876 desc_count
= get_unaligned_be32(&buffer
[24]);
2878 if (lba_count
&& desc_count
)
2879 sdkp
->max_unmap_blocks
= lba_count
;
2881 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2883 if (buffer
[32] & 0x80)
2884 sdkp
->unmap_alignment
=
2885 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2887 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2889 if (sdkp
->max_unmap_blocks
)
2890 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2892 sd_config_discard(sdkp
, SD_LBP_WS16
);
2894 } else { /* LBP VPD page tells us what to use */
2895 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2896 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2897 else if (sdkp
->lbpws
)
2898 sd_config_discard(sdkp
, SD_LBP_WS16
);
2899 else if (sdkp
->lbpws10
)
2900 sd_config_discard(sdkp
, SD_LBP_WS10
);
2901 else if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2902 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2904 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2913 * sd_read_block_characteristics - Query block dev. characteristics
2914 * @sdkp: disk to query
2916 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2918 struct request_queue
*q
= sdkp
->disk
->queue
;
2919 unsigned char *buffer
;
2921 const int vpd_len
= 64;
2923 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2926 /* Block Device Characteristics VPD */
2927 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2930 rot
= get_unaligned_be16(&buffer
[4]);
2933 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
, q
);
2934 queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM
, q
);
2937 if (sdkp
->device
->type
== TYPE_ZBC
) {
2939 q
->limits
.zoned
= BLK_ZONED_HM
;
2941 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2942 if (sdkp
->zoned
== 1)
2944 q
->limits
.zoned
= BLK_ZONED_HA
;
2947 * Treat drive-managed devices as
2948 * regular block devices.
2950 q
->limits
.zoned
= BLK_ZONED_NONE
;
2952 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
2953 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
2954 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
2961 * sd_read_block_provisioning - Query provisioning VPD page
2962 * @sdkp: disk to query
2964 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
2966 unsigned char *buffer
;
2967 const int vpd_len
= 8;
2969 if (sdkp
->lbpme
== 0)
2972 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2974 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
2978 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
2979 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2980 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
2986 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2988 struct scsi_device
*sdev
= sdkp
->device
;
2990 if (sdev
->host
->no_write_same
) {
2991 sdev
->no_write_same
= 1;
2996 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
2997 /* too large values might cause issues with arcmsr */
2998 int vpd_buf_len
= 64;
3000 sdev
->no_report_opcodes
= 1;
3002 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3003 * CODES is unsupported and the device has an ATA
3004 * Information VPD page (SAT).
3006 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3007 sdev
->no_write_same
= 1;
3010 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3013 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3018 * sd_revalidate_disk - called the first time a new disk is seen,
3019 * performs disk spin up, read_capacity, etc.
3020 * @disk: struct gendisk we care about
3022 static int sd_revalidate_disk(struct gendisk
*disk
)
3024 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3025 struct scsi_device
*sdp
= sdkp
->device
;
3026 struct request_queue
*q
= sdkp
->disk
->queue
;
3027 sector_t old_capacity
= sdkp
->capacity
;
3028 unsigned char *buffer
;
3029 unsigned int dev_max
, rw_max
;
3031 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3032 "sd_revalidate_disk\n"));
3035 * If the device is offline, don't try and read capacity or any
3036 * of the other niceties.
3038 if (!scsi_device_online(sdp
))
3041 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3043 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3044 "allocation failure.\n");
3048 sd_spinup_disk(sdkp
);
3051 * Without media there is no reason to ask; moreover, some devices
3052 * react badly if we do.
3054 if (sdkp
->media_present
) {
3055 sd_read_capacity(sdkp
, buffer
);
3057 if (scsi_device_supports_vpd(sdp
)) {
3058 sd_read_block_provisioning(sdkp
);
3059 sd_read_block_limits(sdkp
);
3060 sd_read_block_characteristics(sdkp
);
3061 sd_zbc_read_zones(sdkp
, buffer
);
3064 sd_print_capacity(sdkp
, old_capacity
);
3066 sd_read_write_protect_flag(sdkp
, buffer
);
3067 sd_read_cache_type(sdkp
, buffer
);
3068 sd_read_app_tag_own(sdkp
, buffer
);
3069 sd_read_write_same(sdkp
, buffer
);
3072 sdkp
->first_scan
= 0;
3075 * We now have all cache related info, determine how we deal
3076 * with flush requests.
3078 sd_set_flush_flag(sdkp
);
3080 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3081 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3083 /* Some devices report a maximum block count for READ/WRITE requests. */
3084 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3085 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3088 * Use the device's preferred I/O size for reads and writes
3089 * unless the reported value is unreasonably small, large, or
3092 if (sdkp
->opt_xfer_blocks
&&
3093 sdkp
->opt_xfer_blocks
<= dev_max
&&
3094 sdkp
->opt_xfer_blocks
<= SD_DEF_XFER_BLOCKS
&&
3095 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
) >= PAGE_SIZE
) {
3096 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3097 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3099 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3100 (sector_t
)BLK_DEF_MAX_SECTORS
);
3102 /* Combine with controller limits */
3103 q
->limits
.max_sectors
= min(rw_max
, queue_max_hw_sectors(q
));
3105 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3106 sd_config_write_same(sdkp
);
3114 * sd_unlock_native_capacity - unlock native capacity
3115 * @disk: struct gendisk to set capacity for
3117 * Block layer calls this function if it detects that partitions
3118 * on @disk reach beyond the end of the device. If the SCSI host
3119 * implements ->unlock_native_capacity() method, it's invoked to
3120 * give it a chance to adjust the device capacity.
3123 * Defined by block layer. Might sleep.
3125 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3127 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3129 if (sdev
->host
->hostt
->unlock_native_capacity
)
3130 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3134 * sd_format_disk_name - format disk name
3135 * @prefix: name prefix - ie. "sd" for SCSI disks
3136 * @index: index of the disk to format name for
3137 * @buf: output buffer
3138 * @buflen: length of the output buffer
3140 * SCSI disk names starts at sda. The 26th device is sdz and the
3141 * 27th is sdaa. The last one for two lettered suffix is sdzz
3142 * which is followed by sdaaa.
3144 * This is basically 26 base counting with one extra 'nil' entry
3145 * at the beginning from the second digit on and can be
3146 * determined using similar method as 26 base conversion with the
3147 * index shifted -1 after each digit is computed.
3153 * 0 on success, -errno on failure.
3155 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3157 const int base
= 'z' - 'a' + 1;
3158 char *begin
= buf
+ strlen(prefix
);
3159 char *end
= buf
+ buflen
;
3169 *--p
= 'a' + (index
% unit
);
3170 index
= (index
/ unit
) - 1;
3171 } while (index
>= 0);
3173 memmove(begin
, p
, end
- p
);
3174 memcpy(buf
, prefix
, strlen(prefix
));
3180 * The asynchronous part of sd_probe
3182 static void sd_probe_async(void *data
, async_cookie_t cookie
)
3184 struct scsi_disk
*sdkp
= data
;
3185 struct scsi_device
*sdp
;
3192 index
= sdkp
->index
;
3193 dev
= &sdp
->sdev_gendev
;
3195 gd
->major
= sd_major((index
& 0xf0) >> 4);
3196 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3197 gd
->minors
= SD_MINORS
;
3199 gd
->fops
= &sd_fops
;
3200 gd
->private_data
= &sdkp
->driver
;
3201 gd
->queue
= sdkp
->device
->request_queue
;
3203 /* defaults, until the device tells us otherwise */
3204 sdp
->sector_size
= 512;
3206 sdkp
->media_present
= 1;
3207 sdkp
->write_prot
= 0;
3208 sdkp
->cache_override
= 0;
3212 sdkp
->first_scan
= 1;
3213 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3215 sd_revalidate_disk(gd
);
3217 gd
->flags
= GENHD_FL_EXT_DEVT
;
3218 if (sdp
->removable
) {
3219 gd
->flags
|= GENHD_FL_REMOVABLE
;
3220 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3223 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3224 device_add_disk(dev
, gd
);
3226 sd_dif_config_host(sdkp
);
3228 sd_revalidate_disk(gd
);
3230 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3231 sdp
->removable
? "removable " : "");
3232 scsi_autopm_put_device(sdp
);
3233 put_device(&sdkp
->dev
);
3237 * sd_probe - called during driver initialization and whenever a
3238 * new scsi device is attached to the system. It is called once
3239 * for each scsi device (not just disks) present.
3240 * @dev: pointer to device object
3242 * Returns 0 if successful (or not interested in this scsi device
3243 * (e.g. scanner)); 1 when there is an error.
3245 * Note: this function is invoked from the scsi mid-level.
3246 * This function sets up the mapping between a given
3247 * <host,channel,id,lun> (found in sdp) and new device name
3248 * (e.g. /dev/sda). More precisely it is the block device major
3249 * and minor number that is chosen here.
3251 * Assume sd_probe is not re-entrant (for time being)
3252 * Also think about sd_probe() and sd_remove() running coincidentally.
3254 static int sd_probe(struct device
*dev
)
3256 struct scsi_device
*sdp
= to_scsi_device(dev
);
3257 struct scsi_disk
*sdkp
;
3262 scsi_autopm_get_device(sdp
);
3264 if (sdp
->type
!= TYPE_DISK
&&
3265 sdp
->type
!= TYPE_ZBC
&&
3266 sdp
->type
!= TYPE_MOD
&&
3267 sdp
->type
!= TYPE_RBC
)
3270 #ifndef CONFIG_BLK_DEV_ZONED
3271 if (sdp
->type
== TYPE_ZBC
)
3274 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3278 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3282 gd
= alloc_disk(SD_MINORS
);
3287 if (!ida_pre_get(&sd_index_ida
, GFP_KERNEL
))
3290 spin_lock(&sd_index_lock
);
3291 error
= ida_get_new(&sd_index_ida
, &index
);
3292 spin_unlock(&sd_index_lock
);
3293 } while (error
== -EAGAIN
);
3296 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3300 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3302 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3303 goto out_free_index
;
3307 sdkp
->driver
= &sd_template
;
3309 sdkp
->index
= index
;
3310 atomic_set(&sdkp
->openers
, 0);
3311 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3313 if (!sdp
->request_queue
->rq_timeout
) {
3314 if (sdp
->type
!= TYPE_MOD
)
3315 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3317 blk_queue_rq_timeout(sdp
->request_queue
,
3321 device_initialize(&sdkp
->dev
);
3322 sdkp
->dev
.parent
= dev
;
3323 sdkp
->dev
.class = &sd_disk_class
;
3324 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3326 error
= device_add(&sdkp
->dev
);
3328 goto out_free_index
;
3331 dev_set_drvdata(dev
, sdkp
);
3333 get_device(&sdkp
->dev
); /* prevent release before async_schedule */
3334 async_schedule_domain(sd_probe_async
, sdkp
, &scsi_sd_probe_domain
);
3339 spin_lock(&sd_index_lock
);
3340 ida_remove(&sd_index_ida
, index
);
3341 spin_unlock(&sd_index_lock
);
3347 scsi_autopm_put_device(sdp
);
3352 * sd_remove - called whenever a scsi disk (previously recognized by
3353 * sd_probe) is detached from the system. It is called (potentially
3354 * multiple times) during sd module unload.
3355 * @dev: pointer to device object
3357 * Note: this function is invoked from the scsi mid-level.
3358 * This function potentially frees up a device name (e.g. /dev/sdc)
3359 * that could be re-used by a subsequent sd_probe().
3360 * This function is not called when the built-in sd driver is "exit-ed".
3362 static int sd_remove(struct device
*dev
)
3364 struct scsi_disk
*sdkp
;
3367 sdkp
= dev_get_drvdata(dev
);
3368 devt
= disk_devt(sdkp
->disk
);
3369 scsi_autopm_get_device(sdkp
->device
);
3371 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3372 async_synchronize_full_domain(&scsi_sd_probe_domain
);
3373 device_del(&sdkp
->dev
);
3374 del_gendisk(sdkp
->disk
);
3377 sd_zbc_remove(sdkp
);
3379 blk_register_region(devt
, SD_MINORS
, NULL
,
3380 sd_default_probe
, NULL
, NULL
);
3382 mutex_lock(&sd_ref_mutex
);
3383 dev_set_drvdata(dev
, NULL
);
3384 put_device(&sdkp
->dev
);
3385 mutex_unlock(&sd_ref_mutex
);
3391 * scsi_disk_release - Called to free the scsi_disk structure
3392 * @dev: pointer to embedded class device
3394 * sd_ref_mutex must be held entering this routine. Because it is
3395 * called on last put, you should always use the scsi_disk_get()
3396 * scsi_disk_put() helpers which manipulate the semaphore directly
3397 * and never do a direct put_device.
3399 static void scsi_disk_release(struct device
*dev
)
3401 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3402 struct gendisk
*disk
= sdkp
->disk
;
3404 spin_lock(&sd_index_lock
);
3405 ida_remove(&sd_index_ida
, sdkp
->index
);
3406 spin_unlock(&sd_index_lock
);
3408 disk
->private_data
= NULL
;
3410 put_device(&sdkp
->device
->sdev_gendev
);
3415 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3417 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3418 struct scsi_sense_hdr sshdr
;
3419 struct scsi_device
*sdp
= sdkp
->device
;
3423 cmd
[4] |= 1; /* START */
3425 if (sdp
->start_stop_pwr_cond
)
3426 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3428 if (!scsi_device_online(sdp
))
3431 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3432 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3434 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3435 if (driver_byte(res
) & DRIVER_SENSE
)
3436 sd_print_sense_hdr(sdkp
, &sshdr
);
3437 if (scsi_sense_valid(&sshdr
) &&
3438 /* 0x3a is medium not present */
3443 /* SCSI error codes must not go to the generic layer */
3451 * Send a SYNCHRONIZE CACHE instruction down to the device through
3452 * the normal SCSI command structure. Wait for the command to
3455 static void sd_shutdown(struct device
*dev
)
3457 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3460 return; /* this can happen */
3462 if (pm_runtime_suspended(dev
))
3465 if (sdkp
->WCE
&& sdkp
->media_present
) {
3466 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3467 sd_sync_cache(sdkp
, NULL
);
3470 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3471 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3472 sd_start_stop_device(sdkp
, 0);
3476 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3478 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3479 struct scsi_sense_hdr sshdr
;
3482 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3485 if (sdkp
->WCE
&& sdkp
->media_present
) {
3486 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3487 ret
= sd_sync_cache(sdkp
, &sshdr
);
3490 /* ignore OFFLINE device */
3494 if (!scsi_sense_valid(&sshdr
) ||
3495 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3499 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3500 * doesn't support sync. There's not much to do and
3501 * suspend shouldn't fail.
3507 if (sdkp
->device
->manage_start_stop
) {
3508 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3509 /* an error is not worth aborting a system sleep */
3510 ret
= sd_start_stop_device(sdkp
, 0);
3511 if (ignore_stop_errors
)
3518 static int sd_suspend_system(struct device
*dev
)
3520 return sd_suspend_common(dev
, true);
3523 static int sd_suspend_runtime(struct device
*dev
)
3525 return sd_suspend_common(dev
, false);
3528 static int sd_resume(struct device
*dev
)
3530 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3532 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3535 if (!sdkp
->device
->manage_start_stop
)
3538 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3539 return sd_start_stop_device(sdkp
, 1);
3543 * init_sd - entry point for this driver (both when built in or when
3546 * Note: this function registers this driver with the scsi mid-level.
3548 static int __init
init_sd(void)
3550 int majors
= 0, i
, err
;
3552 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3554 for (i
= 0; i
< SD_MAJORS
; i
++) {
3555 if (register_blkdev(sd_major(i
), "sd") != 0)
3558 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3559 sd_default_probe
, NULL
, NULL
);
3565 err
= class_register(&sd_disk_class
);
3569 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3571 if (!sd_cdb_cache
) {
3572 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3577 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3579 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3584 err
= scsi_register_driver(&sd_template
.gendrv
);
3586 goto err_out_driver
;
3591 mempool_destroy(sd_cdb_pool
);
3594 kmem_cache_destroy(sd_cdb_cache
);
3597 class_unregister(&sd_disk_class
);
3599 for (i
= 0; i
< SD_MAJORS
; i
++)
3600 unregister_blkdev(sd_major(i
), "sd");
3605 * exit_sd - exit point for this driver (when it is a module).
3607 * Note: this function unregisters this driver from the scsi mid-level.
3609 static void __exit
exit_sd(void)
3613 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3615 scsi_unregister_driver(&sd_template
.gendrv
);
3616 mempool_destroy(sd_cdb_pool
);
3617 kmem_cache_destroy(sd_cdb_cache
);
3619 class_unregister(&sd_disk_class
);
3621 for (i
= 0; i
< SD_MAJORS
; i
++) {
3622 blk_unregister_region(sd_major(i
), SD_MINORS
);
3623 unregister_blkdev(sd_major(i
), "sd");
3627 module_init(init_sd
);
3628 module_exit(exit_sd
);
3630 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3631 struct scsi_sense_hdr
*sshdr
)
3633 scsi_print_sense_hdr(sdkp
->device
,
3634 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3637 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3640 const char *hb_string
= scsi_hostbyte_string(result
);
3641 const char *db_string
= scsi_driverbyte_string(result
);
3643 if (hb_string
|| db_string
)
3644 sd_printk(KERN_INFO
, sdkp
,
3645 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3646 hb_string
? hb_string
: "invalid",
3647 db_string
? db_string
: "invalid");
3649 sd_printk(KERN_INFO
, sdkp
,
3650 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3651 msg
, host_byte(result
), driver_byte(result
));