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);
831 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
832 switch (sdkp
->zeroing_mode
) {
833 case SD_ZERO_WS16_UNMAP
:
834 return sd_setup_write_same16_cmnd(cmd
, true);
835 case SD_ZERO_WS10_UNMAP
:
836 return sd_setup_write_same10_cmnd(cmd
, true);
840 if (sdp
->no_write_same
)
841 return BLKPREP_INVALID
;
842 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff)
843 return sd_setup_write_same16_cmnd(cmd
, false);
844 return sd_setup_write_same10_cmnd(cmd
, false);
847 static void sd_config_write_same(struct scsi_disk
*sdkp
)
849 struct request_queue
*q
= sdkp
->disk
->queue
;
850 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
852 if (sdkp
->device
->no_write_same
) {
853 sdkp
->max_ws_blocks
= 0;
857 /* Some devices can not handle block counts above 0xffff despite
858 * supporting WRITE SAME(16). Consequently we default to 64k
859 * blocks per I/O unless the device explicitly advertises a
862 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
863 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
864 (u32
)SD_MAX_WS16_BLOCKS
);
865 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
866 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
867 (u32
)SD_MAX_WS10_BLOCKS
);
869 sdkp
->device
->no_write_same
= 1;
870 sdkp
->max_ws_blocks
= 0;
873 if (sdkp
->lbprz
&& sdkp
->lbpws
)
874 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
875 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
876 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
877 else if (sdkp
->max_ws_blocks
)
878 sdkp
->zeroing_mode
= SD_ZERO_WS
;
880 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
883 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
884 (logical_block_size
>> 9));
885 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
886 (logical_block_size
>> 9));
890 * sd_setup_write_same_cmnd - write the same data to multiple blocks
891 * @cmd: command to prepare
893 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
894 * the preference indicated by the target device.
896 static int sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
898 struct request
*rq
= cmd
->request
;
899 struct scsi_device
*sdp
= cmd
->device
;
900 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
901 struct bio
*bio
= rq
->bio
;
902 sector_t sector
= blk_rq_pos(rq
);
903 unsigned int nr_sectors
= blk_rq_sectors(rq
);
904 unsigned int nr_bytes
= blk_rq_bytes(rq
);
907 if (sdkp
->device
->no_write_same
)
908 return BLKPREP_INVALID
;
910 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
912 if (sd_is_zoned(sdkp
)) {
913 ret
= sd_zbc_write_lock_zone(cmd
);
914 if (ret
!= BLKPREP_OK
)
918 sector
>>= ilog2(sdp
->sector_size
) - 9;
919 nr_sectors
>>= ilog2(sdp
->sector_size
) - 9;
921 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
923 if (sdkp
->ws16
|| sector
> 0xffffffff || nr_sectors
> 0xffff) {
925 cmd
->cmnd
[0] = WRITE_SAME_16
;
926 put_unaligned_be64(sector
, &cmd
->cmnd
[2]);
927 put_unaligned_be32(nr_sectors
, &cmd
->cmnd
[10]);
930 cmd
->cmnd
[0] = WRITE_SAME
;
931 put_unaligned_be32(sector
, &cmd
->cmnd
[2]);
932 put_unaligned_be16(nr_sectors
, &cmd
->cmnd
[7]);
935 cmd
->transfersize
= sdp
->sector_size
;
936 cmd
->allowed
= SD_MAX_RETRIES
;
939 * For WRITE SAME the data transferred via the DATA OUT buffer is
940 * different from the amount of data actually written to the target.
942 * We set up __data_len to the amount of data transferred via the
943 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
944 * to transfer a single sector of data first, but then reset it to
945 * the amount of data to be written right after so that the I/O path
946 * knows how much to actually write.
948 rq
->__data_len
= sdp
->sector_size
;
949 ret
= scsi_init_io(cmd
);
950 rq
->__data_len
= nr_bytes
;
954 static int sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
956 struct request
*rq
= cmd
->request
;
958 /* flush requests don't perform I/O, zero the S/G table */
959 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
961 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
963 cmd
->transfersize
= 0;
964 cmd
->allowed
= SD_MAX_RETRIES
;
966 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
970 static int sd_setup_read_write_cmnd(struct scsi_cmnd
*SCpnt
)
972 struct request
*rq
= SCpnt
->request
;
973 struct scsi_device
*sdp
= SCpnt
->device
;
974 struct gendisk
*disk
= rq
->rq_disk
;
975 struct scsi_disk
*sdkp
= scsi_disk(disk
);
976 sector_t block
= blk_rq_pos(rq
);
978 unsigned int this_count
= blk_rq_sectors(rq
);
979 unsigned int dif
, dix
;
980 bool zoned_write
= sd_is_zoned(sdkp
) && rq_data_dir(rq
) == WRITE
;
982 unsigned char protect
;
985 ret
= sd_zbc_write_lock_zone(SCpnt
);
986 if (ret
!= BLKPREP_OK
)
990 ret
= scsi_init_io(SCpnt
);
991 if (ret
!= BLKPREP_OK
)
995 /* from here on until we're complete, any goto out
996 * is used for a killable error condition */
1000 scmd_printk(KERN_INFO
, SCpnt
,
1001 "%s: block=%llu, count=%d\n",
1002 __func__
, (unsigned long long)block
, this_count
));
1004 if (!sdp
|| !scsi_device_online(sdp
) ||
1005 block
+ blk_rq_sectors(rq
) > get_capacity(disk
)) {
1006 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1007 "Finishing %u sectors\n",
1008 blk_rq_sectors(rq
)));
1009 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1010 "Retry with 0x%p\n", SCpnt
));
1016 * quietly refuse to do anything to a changed disc until
1017 * the changed bit has been reset
1019 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
1024 * Some SD card readers can't handle multi-sector accesses which touch
1025 * the last one or two hardware sectors. Split accesses as needed.
1027 threshold
= get_capacity(disk
) - SD_LAST_BUGGY_SECTORS
*
1028 (sdp
->sector_size
/ 512);
1030 if (unlikely(sdp
->last_sector_bug
&& block
+ this_count
> threshold
)) {
1031 if (block
< threshold
) {
1032 /* Access up to the threshold but not beyond */
1033 this_count
= threshold
- block
;
1035 /* Access only a single hardware sector */
1036 this_count
= sdp
->sector_size
/ 512;
1040 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
, "block=%llu\n",
1041 (unsigned long long)block
));
1044 * If we have a 1K hardware sectorsize, prevent access to single
1045 * 512 byte sectors. In theory we could handle this - in fact
1046 * the scsi cdrom driver must be able to handle this because
1047 * we typically use 1K blocksizes, and cdroms typically have
1048 * 2K hardware sectorsizes. Of course, things are simpler
1049 * with the cdrom, since it is read-only. For performance
1050 * reasons, the filesystems should be able to handle this
1051 * and not force the scsi disk driver to use bounce buffers
1054 if (sdp
->sector_size
== 1024) {
1055 if ((block
& 1) || (blk_rq_sectors(rq
) & 1)) {
1056 scmd_printk(KERN_ERR
, SCpnt
,
1057 "Bad block number requested\n");
1061 this_count
= this_count
>> 1;
1064 if (sdp
->sector_size
== 2048) {
1065 if ((block
& 3) || (blk_rq_sectors(rq
) & 3)) {
1066 scmd_printk(KERN_ERR
, SCpnt
,
1067 "Bad block number requested\n");
1071 this_count
= this_count
>> 2;
1074 if (sdp
->sector_size
== 4096) {
1075 if ((block
& 7) || (blk_rq_sectors(rq
) & 7)) {
1076 scmd_printk(KERN_ERR
, SCpnt
,
1077 "Bad block number requested\n");
1081 this_count
= this_count
>> 3;
1084 if (rq_data_dir(rq
) == WRITE
) {
1085 SCpnt
->cmnd
[0] = WRITE_6
;
1087 if (blk_integrity_rq(rq
))
1088 sd_dif_prepare(SCpnt
);
1090 } else if (rq_data_dir(rq
) == READ
) {
1091 SCpnt
->cmnd
[0] = READ_6
;
1093 scmd_printk(KERN_ERR
, SCpnt
, "Unknown command %d\n", req_op(rq
));
1097 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO
, SCpnt
,
1098 "%s %d/%u 512 byte blocks.\n",
1099 (rq_data_dir(rq
) == WRITE
) ?
1100 "writing" : "reading", this_count
,
1101 blk_rq_sectors(rq
)));
1103 dix
= scsi_prot_sg_count(SCpnt
);
1104 dif
= scsi_host_dif_capable(SCpnt
->device
->host
, sdkp
->protection_type
);
1107 protect
= sd_setup_protect_cmnd(SCpnt
, dix
, dif
);
1111 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1112 SCpnt
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1114 if (unlikely(SCpnt
->cmnd
== NULL
)) {
1115 ret
= BLKPREP_DEFER
;
1119 SCpnt
->cmd_len
= SD_EXT_CDB_SIZE
;
1120 memset(SCpnt
->cmnd
, 0, SCpnt
->cmd_len
);
1121 SCpnt
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1122 SCpnt
->cmnd
[7] = 0x18;
1123 SCpnt
->cmnd
[9] = (rq_data_dir(rq
) == READ
) ? READ_32
: WRITE_32
;
1124 SCpnt
->cmnd
[10] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1127 SCpnt
->cmnd
[12] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1128 SCpnt
->cmnd
[13] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1129 SCpnt
->cmnd
[14] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1130 SCpnt
->cmnd
[15] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1131 SCpnt
->cmnd
[16] = (unsigned char) (block
>> 24) & 0xff;
1132 SCpnt
->cmnd
[17] = (unsigned char) (block
>> 16) & 0xff;
1133 SCpnt
->cmnd
[18] = (unsigned char) (block
>> 8) & 0xff;
1134 SCpnt
->cmnd
[19] = (unsigned char) block
& 0xff;
1136 /* Expected Indirect LBA */
1137 SCpnt
->cmnd
[20] = (unsigned char) (block
>> 24) & 0xff;
1138 SCpnt
->cmnd
[21] = (unsigned char) (block
>> 16) & 0xff;
1139 SCpnt
->cmnd
[22] = (unsigned char) (block
>> 8) & 0xff;
1140 SCpnt
->cmnd
[23] = (unsigned char) block
& 0xff;
1142 /* Transfer length */
1143 SCpnt
->cmnd
[28] = (unsigned char) (this_count
>> 24) & 0xff;
1144 SCpnt
->cmnd
[29] = (unsigned char) (this_count
>> 16) & 0xff;
1145 SCpnt
->cmnd
[30] = (unsigned char) (this_count
>> 8) & 0xff;
1146 SCpnt
->cmnd
[31] = (unsigned char) this_count
& 0xff;
1147 } else if (sdp
->use_16_for_rw
|| (this_count
> 0xffff)) {
1148 SCpnt
->cmnd
[0] += READ_16
- READ_6
;
1149 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1150 SCpnt
->cmnd
[2] = sizeof(block
) > 4 ? (unsigned char) (block
>> 56) & 0xff : 0;
1151 SCpnt
->cmnd
[3] = sizeof(block
) > 4 ? (unsigned char) (block
>> 48) & 0xff : 0;
1152 SCpnt
->cmnd
[4] = sizeof(block
) > 4 ? (unsigned char) (block
>> 40) & 0xff : 0;
1153 SCpnt
->cmnd
[5] = sizeof(block
) > 4 ? (unsigned char) (block
>> 32) & 0xff : 0;
1154 SCpnt
->cmnd
[6] = (unsigned char) (block
>> 24) & 0xff;
1155 SCpnt
->cmnd
[7] = (unsigned char) (block
>> 16) & 0xff;
1156 SCpnt
->cmnd
[8] = (unsigned char) (block
>> 8) & 0xff;
1157 SCpnt
->cmnd
[9] = (unsigned char) block
& 0xff;
1158 SCpnt
->cmnd
[10] = (unsigned char) (this_count
>> 24) & 0xff;
1159 SCpnt
->cmnd
[11] = (unsigned char) (this_count
>> 16) & 0xff;
1160 SCpnt
->cmnd
[12] = (unsigned char) (this_count
>> 8) & 0xff;
1161 SCpnt
->cmnd
[13] = (unsigned char) this_count
& 0xff;
1162 SCpnt
->cmnd
[14] = SCpnt
->cmnd
[15] = 0;
1163 } else if ((this_count
> 0xff) || (block
> 0x1fffff) ||
1164 scsi_device_protection(SCpnt
->device
) ||
1165 SCpnt
->device
->use_10_for_rw
) {
1166 SCpnt
->cmnd
[0] += READ_10
- READ_6
;
1167 SCpnt
->cmnd
[1] = protect
| ((rq
->cmd_flags
& REQ_FUA
) ? 0x8 : 0);
1168 SCpnt
->cmnd
[2] = (unsigned char) (block
>> 24) & 0xff;
1169 SCpnt
->cmnd
[3] = (unsigned char) (block
>> 16) & 0xff;
1170 SCpnt
->cmnd
[4] = (unsigned char) (block
>> 8) & 0xff;
1171 SCpnt
->cmnd
[5] = (unsigned char) block
& 0xff;
1172 SCpnt
->cmnd
[6] = SCpnt
->cmnd
[9] = 0;
1173 SCpnt
->cmnd
[7] = (unsigned char) (this_count
>> 8) & 0xff;
1174 SCpnt
->cmnd
[8] = (unsigned char) this_count
& 0xff;
1176 if (unlikely(rq
->cmd_flags
& REQ_FUA
)) {
1178 * This happens only if this drive failed
1179 * 10byte rw command with ILLEGAL_REQUEST
1180 * during operation and thus turned off
1183 scmd_printk(KERN_ERR
, SCpnt
,
1184 "FUA write on READ/WRITE(6) drive\n");
1188 SCpnt
->cmnd
[1] |= (unsigned char) ((block
>> 16) & 0x1f);
1189 SCpnt
->cmnd
[2] = (unsigned char) ((block
>> 8) & 0xff);
1190 SCpnt
->cmnd
[3] = (unsigned char) block
& 0xff;
1191 SCpnt
->cmnd
[4] = (unsigned char) this_count
;
1194 SCpnt
->sdb
.length
= this_count
* sdp
->sector_size
;
1197 * We shouldn't disconnect in the middle of a sector, so with a dumb
1198 * host adapter, it's safe to assume that we can at least transfer
1199 * this many bytes between each connect / disconnect.
1201 SCpnt
->transfersize
= sdp
->sector_size
;
1202 SCpnt
->underflow
= this_count
<< 9;
1203 SCpnt
->allowed
= SD_MAX_RETRIES
;
1206 * This indicates that the command is ready from our end to be
1211 if (zoned_write
&& ret
!= BLKPREP_OK
)
1212 sd_zbc_write_unlock_zone(SCpnt
);
1217 static int sd_init_command(struct scsi_cmnd
*cmd
)
1219 struct request
*rq
= cmd
->request
;
1221 switch (req_op(rq
)) {
1222 case REQ_OP_DISCARD
:
1223 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1225 return sd_setup_unmap_cmnd(cmd
);
1227 return sd_setup_write_same16_cmnd(cmd
, true);
1229 return sd_setup_write_same10_cmnd(cmd
, true);
1231 return sd_setup_write_same10_cmnd(cmd
, false);
1233 return BLKPREP_INVALID
;
1235 case REQ_OP_WRITE_ZEROES
:
1236 return sd_setup_write_zeroes_cmnd(cmd
);
1237 case REQ_OP_WRITE_SAME
:
1238 return sd_setup_write_same_cmnd(cmd
);
1240 return sd_setup_flush_cmnd(cmd
);
1243 return sd_setup_read_write_cmnd(cmd
);
1244 case REQ_OP_ZONE_REPORT
:
1245 return sd_zbc_setup_report_cmnd(cmd
);
1246 case REQ_OP_ZONE_RESET
:
1247 return sd_zbc_setup_reset_cmnd(cmd
);
1253 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1255 struct request
*rq
= SCpnt
->request
;
1257 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1258 __free_page(rq
->special_vec
.bv_page
);
1260 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1261 mempool_free(SCpnt
->cmnd
, sd_cdb_pool
);
1268 * sd_open - open a scsi disk device
1269 * @bdev: Block device of the scsi disk to open
1270 * @mode: FMODE_* mask
1272 * Returns 0 if successful. Returns a negated errno value in case
1275 * Note: This can be called from a user context (e.g. fsck(1) )
1276 * or from within the kernel (e.g. as a result of a mount(1) ).
1277 * In the latter case @inode and @filp carry an abridged amount
1278 * of information as noted above.
1280 * Locking: called with bdev->bd_mutex held.
1282 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1284 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1285 struct scsi_device
*sdev
;
1291 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1293 sdev
= sdkp
->device
;
1296 * If the device is in error recovery, wait until it is done.
1297 * If the device is offline, then disallow any access to it.
1300 if (!scsi_block_when_processing_errors(sdev
))
1303 if (sdev
->removable
|| sdkp
->write_prot
)
1304 check_disk_change(bdev
);
1307 * If the drive is empty, just let the open fail.
1309 retval
= -ENOMEDIUM
;
1310 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1314 * If the device has the write protect tab set, have the open fail
1315 * if the user expects to be able to write to the thing.
1318 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1322 * It is possible that the disk changing stuff resulted in
1323 * the device being taken offline. If this is the case,
1324 * report this to the user, and don't pretend that the
1325 * open actually succeeded.
1328 if (!scsi_device_online(sdev
))
1331 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1332 if (scsi_block_when_processing_errors(sdev
))
1333 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1339 scsi_disk_put(sdkp
);
1344 * sd_release - invoked when the (last) close(2) is called on this
1346 * @disk: disk to release
1347 * @mode: FMODE_* mask
1351 * Note: may block (uninterruptible) if error recovery is underway
1354 * Locking: called with bdev->bd_mutex held.
1356 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1358 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1359 struct scsi_device
*sdev
= sdkp
->device
;
1361 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1363 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1364 if (scsi_block_when_processing_errors(sdev
))
1365 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1369 * XXX and what if there are packets in flight and this close()
1370 * XXX is followed by a "rmmod sd_mod"?
1373 scsi_disk_put(sdkp
);
1376 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1378 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1379 struct scsi_device
*sdp
= sdkp
->device
;
1380 struct Scsi_Host
*host
= sdp
->host
;
1381 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1384 /* default to most commonly used values */
1385 diskinfo
[0] = 0x40; /* 1 << 6 */
1386 diskinfo
[1] = 0x20; /* 1 << 5 */
1387 diskinfo
[2] = capacity
>> 11;
1389 /* override with calculated, extended default, or driver values */
1390 if (host
->hostt
->bios_param
)
1391 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1393 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1395 geo
->heads
= diskinfo
[0];
1396 geo
->sectors
= diskinfo
[1];
1397 geo
->cylinders
= diskinfo
[2];
1402 * sd_ioctl - process an ioctl
1403 * @bdev: target block device
1404 * @mode: FMODE_* mask
1405 * @cmd: ioctl command number
1406 * @arg: this is third argument given to ioctl(2) system call.
1407 * Often contains a pointer.
1409 * Returns 0 if successful (some ioctls return positive numbers on
1410 * success as well). Returns a negated errno value in case of error.
1412 * Note: most ioctls are forward onto the block subsystem or further
1413 * down in the scsi subsystem.
1415 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1416 unsigned int cmd
, unsigned long arg
)
1418 struct gendisk
*disk
= bdev
->bd_disk
;
1419 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1420 struct scsi_device
*sdp
= sdkp
->device
;
1421 void __user
*p
= (void __user
*)arg
;
1424 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1425 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1427 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1432 * If we are in the middle of error recovery, don't let anyone
1433 * else try and use this device. Also, if error recovery fails, it
1434 * may try and take the device offline, in which case all further
1435 * access to the device is prohibited.
1437 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1438 (mode
& FMODE_NDELAY
) != 0);
1443 * Send SCSI addressing ioctls directly to mid level, send other
1444 * ioctls to block level and then onto mid level if they can't be
1448 case SCSI_IOCTL_GET_IDLUN
:
1449 case SCSI_IOCTL_GET_BUS_NUMBER
:
1450 error
= scsi_ioctl(sdp
, cmd
, p
);
1453 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1454 if (error
!= -ENOTTY
)
1456 error
= scsi_ioctl(sdp
, cmd
, p
);
1463 static void set_media_not_present(struct scsi_disk
*sdkp
)
1465 if (sdkp
->media_present
)
1466 sdkp
->device
->changed
= 1;
1468 if (sdkp
->device
->removable
) {
1469 sdkp
->media_present
= 0;
1474 static int media_not_present(struct scsi_disk
*sdkp
,
1475 struct scsi_sense_hdr
*sshdr
)
1477 if (!scsi_sense_valid(sshdr
))
1480 /* not invoked for commands that could return deferred errors */
1481 switch (sshdr
->sense_key
) {
1482 case UNIT_ATTENTION
:
1484 /* medium not present */
1485 if (sshdr
->asc
== 0x3A) {
1486 set_media_not_present(sdkp
);
1494 * sd_check_events - check media events
1495 * @disk: kernel device descriptor
1496 * @clearing: disk events currently being cleared
1498 * Returns mask of DISK_EVENT_*.
1500 * Note: this function is invoked from the block subsystem.
1502 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1504 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1505 struct scsi_device
*sdp
;
1512 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1515 * If the device is offline, don't send any commands - just pretend as
1516 * if the command failed. If the device ever comes back online, we
1517 * can deal with it then. It is only because of unrecoverable errors
1518 * that we would ever take a device offline in the first place.
1520 if (!scsi_device_online(sdp
)) {
1521 set_media_not_present(sdkp
);
1526 * Using TEST_UNIT_READY enables differentiation between drive with
1527 * no cartridge loaded - NOT READY, drive with changed cartridge -
1528 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1530 * Drives that auto spin down. eg iomega jaz 1G, will be started
1531 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1532 * sd_revalidate() is called.
1534 if (scsi_block_when_processing_errors(sdp
)) {
1535 struct scsi_sense_hdr sshdr
= { 0, };
1537 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1540 /* failed to execute TUR, assume media not present */
1541 if (host_byte(retval
)) {
1542 set_media_not_present(sdkp
);
1546 if (media_not_present(sdkp
, &sshdr
))
1551 * For removable scsi disk we have to recognise the presence
1552 * of a disk in the drive.
1554 if (!sdkp
->media_present
)
1556 sdkp
->media_present
= 1;
1559 * sdp->changed is set under the following conditions:
1561 * Medium present state has changed in either direction.
1562 * Device has indicated UNIT_ATTENTION.
1564 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1566 scsi_disk_put(sdkp
);
1570 static int sd_sync_cache(struct scsi_disk
*sdkp
)
1573 struct scsi_device
*sdp
= sdkp
->device
;
1574 const int timeout
= sdp
->request_queue
->rq_timeout
1575 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1576 struct scsi_sense_hdr sshdr
;
1578 if (!scsi_device_online(sdp
))
1581 for (retries
= 3; retries
> 0; --retries
) {
1582 unsigned char cmd
[10] = { 0 };
1584 cmd
[0] = SYNCHRONIZE_CACHE
;
1586 * Leave the rest of the command zero to indicate
1589 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
1590 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1596 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1598 if (driver_byte(res
) & DRIVER_SENSE
)
1599 sd_print_sense_hdr(sdkp
, &sshdr
);
1600 /* we need to evaluate the error return */
1601 if (scsi_sense_valid(&sshdr
) &&
1602 (sshdr
.asc
== 0x3a || /* medium not present */
1603 sshdr
.asc
== 0x20)) /* invalid command */
1604 /* this is no error here */
1607 switch (host_byte(res
)) {
1608 /* ignore errors due to racing a disconnection */
1609 case DID_BAD_TARGET
:
1610 case DID_NO_CONNECT
:
1612 /* signal the upper layer it might try again */
1616 case DID_SOFT_ERROR
:
1625 static void sd_rescan(struct device
*dev
)
1627 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1629 revalidate_disk(sdkp
->disk
);
1633 #ifdef CONFIG_COMPAT
1635 * This gets directly called from VFS. When the ioctl
1636 * is not recognized we go back to the other translation paths.
1638 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1639 unsigned int cmd
, unsigned long arg
)
1641 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1644 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1645 (mode
& FMODE_NDELAY
) != 0);
1650 * Let the static ioctl translation table take care of it.
1652 if (!sdev
->host
->hostt
->compat_ioctl
)
1653 return -ENOIOCTLCMD
;
1654 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1658 static char sd_pr_type(enum pr_type type
)
1661 case PR_WRITE_EXCLUSIVE
:
1663 case PR_EXCLUSIVE_ACCESS
:
1665 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1667 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1669 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1671 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1678 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1679 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1681 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1682 struct scsi_sense_hdr sshdr
;
1684 u8 cmd
[16] = { 0, };
1685 u8 data
[24] = { 0, };
1687 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1690 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1692 put_unaligned_be64(key
, &data
[0]);
1693 put_unaligned_be64(sa_key
, &data
[8]);
1696 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1697 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1699 if ((driver_byte(result
) & DRIVER_SENSE
) &&
1700 (scsi_sense_valid(&sshdr
))) {
1701 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1702 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1708 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1711 if (flags
& ~PR_FL_IGNORE_KEY
)
1713 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1714 old_key
, new_key
, 0,
1715 (1 << 0) /* APTPL */);
1718 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1723 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1726 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1728 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1731 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1732 enum pr_type type
, bool abort
)
1734 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1735 sd_pr_type(type
), 0);
1738 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1740 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1743 static const struct pr_ops sd_pr_ops
= {
1744 .pr_register
= sd_pr_register
,
1745 .pr_reserve
= sd_pr_reserve
,
1746 .pr_release
= sd_pr_release
,
1747 .pr_preempt
= sd_pr_preempt
,
1748 .pr_clear
= sd_pr_clear
,
1751 static const struct block_device_operations sd_fops
= {
1752 .owner
= THIS_MODULE
,
1754 .release
= sd_release
,
1756 .getgeo
= sd_getgeo
,
1757 #ifdef CONFIG_COMPAT
1758 .compat_ioctl
= sd_compat_ioctl
,
1760 .check_events
= sd_check_events
,
1761 .revalidate_disk
= sd_revalidate_disk
,
1762 .unlock_native_capacity
= sd_unlock_native_capacity
,
1763 .pr_ops
= &sd_pr_ops
,
1767 * sd_eh_reset - reset error handling callback
1768 * @scmd: sd-issued command that has failed
1770 * This function is called by the SCSI midlayer before starting
1771 * SCSI EH. When counting medium access failures we have to be
1772 * careful to register it only only once per device and SCSI EH run;
1773 * there might be several timed out commands which will cause the
1774 * 'max_medium_access_timeouts' counter to trigger after the first
1775 * SCSI EH run already and set the device to offline.
1776 * So this function resets the internal counter before starting SCSI EH.
1778 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1780 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1782 /* New SCSI EH run, reset gate variable */
1783 sdkp
->ignore_medium_access_errors
= false;
1787 * sd_eh_action - error handling callback
1788 * @scmd: sd-issued command that has failed
1789 * @eh_disp: The recovery disposition suggested by the midlayer
1791 * This function is called by the SCSI midlayer upon completion of an
1792 * error test command (currently TEST UNIT READY). The result of sending
1793 * the eh command is passed in eh_disp. We're looking for devices that
1794 * fail medium access commands but are OK with non access commands like
1795 * test unit ready (so wrongly see the device as having a successful
1798 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1800 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1802 if (!scsi_device_online(scmd
->device
) ||
1803 !scsi_medium_access_command(scmd
) ||
1804 host_byte(scmd
->result
) != DID_TIME_OUT
||
1809 * The device has timed out executing a medium access command.
1810 * However, the TEST UNIT READY command sent during error
1811 * handling completed successfully. Either the device is in the
1812 * process of recovering or has it suffered an internal failure
1813 * that prevents access to the storage medium.
1815 if (!sdkp
->ignore_medium_access_errors
) {
1816 sdkp
->medium_access_timed_out
++;
1817 sdkp
->ignore_medium_access_errors
= true;
1821 * If the device keeps failing read/write commands but TEST UNIT
1822 * READY always completes successfully we assume that medium
1823 * access is no longer possible and take the device offline.
1825 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1826 scmd_printk(KERN_ERR
, scmd
,
1827 "Medium access timeout failure. Offlining disk!\n");
1828 scsi_device_set_state(scmd
->device
, SDEV_OFFLINE
);
1836 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1838 struct request
*req
= scmd
->request
;
1839 struct scsi_device
*sdev
= scmd
->device
;
1840 unsigned int transferred
, good_bytes
;
1841 u64 start_lba
, end_lba
, bad_lba
;
1844 * Some commands have a payload smaller than the device logical
1845 * block size (e.g. INQUIRY on a 4K disk).
1847 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1850 /* Check if we have a 'bad_lba' information */
1851 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1852 SCSI_SENSE_BUFFERSIZE
,
1857 * If the bad lba was reported incorrectly, we have no idea where
1860 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1861 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1862 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1866 * resid is optional but mostly filled in. When it's unused,
1867 * its value is zero, so we assume the whole buffer transferred
1869 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1871 /* This computation should always be done in terms of the
1872 * resolution of the device's medium.
1874 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1876 return min(good_bytes
, transferred
);
1880 * sd_done - bottom half handler: called when the lower level
1881 * driver has completed (successfully or otherwise) a scsi command.
1882 * @SCpnt: mid-level's per command structure.
1884 * Note: potentially run from within an ISR. Must not block.
1886 static int sd_done(struct scsi_cmnd
*SCpnt
)
1888 int result
= SCpnt
->result
;
1889 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1890 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1892 struct scsi_sense_hdr sshdr
;
1893 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1894 struct request
*req
= SCpnt
->request
;
1895 int sense_valid
= 0;
1896 int sense_deferred
= 0;
1898 switch (req_op(req
)) {
1899 case REQ_OP_DISCARD
:
1900 case REQ_OP_WRITE_ZEROES
:
1901 case REQ_OP_WRITE_SAME
:
1902 case REQ_OP_ZONE_RESET
:
1904 good_bytes
= blk_rq_bytes(req
);
1905 scsi_set_resid(SCpnt
, 0);
1908 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1911 case REQ_OP_ZONE_REPORT
:
1913 good_bytes
= scsi_bufflen(SCpnt
)
1914 - scsi_get_resid(SCpnt
);
1915 scsi_set_resid(SCpnt
, 0);
1918 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1923 * In case of bogus fw or device, we could end up having
1924 * an unaligned partial completion. Check this here and force
1927 resid
= scsi_get_resid(SCpnt
);
1928 if (resid
& (sector_size
- 1)) {
1929 sd_printk(KERN_INFO
, sdkp
,
1930 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1931 resid
, sector_size
);
1932 resid
= min(scsi_bufflen(SCpnt
),
1933 round_up(resid
, sector_size
));
1934 scsi_set_resid(SCpnt
, resid
);
1939 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
1941 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
1943 sdkp
->medium_access_timed_out
= 0;
1945 if (driver_byte(result
) != DRIVER_SENSE
&&
1946 (!sense_valid
|| sense_deferred
))
1949 switch (sshdr
.sense_key
) {
1950 case HARDWARE_ERROR
:
1952 good_bytes
= sd_completed_bytes(SCpnt
);
1954 case RECOVERED_ERROR
:
1955 good_bytes
= scsi_bufflen(SCpnt
);
1958 /* This indicates a false check condition, so ignore it. An
1959 * unknown amount of data was transferred so treat it as an
1963 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
1965 case ABORTED_COMMAND
:
1966 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
1967 good_bytes
= sd_completed_bytes(SCpnt
);
1969 case ILLEGAL_REQUEST
:
1970 switch (sshdr
.asc
) {
1971 case 0x10: /* DIX: Host detected corruption */
1972 good_bytes
= sd_completed_bytes(SCpnt
);
1974 case 0x20: /* INVALID COMMAND OPCODE */
1975 case 0x24: /* INVALID FIELD IN CDB */
1976 switch (SCpnt
->cmnd
[0]) {
1978 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
1982 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
1983 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
1985 sdkp
->device
->no_write_same
= 1;
1986 sd_config_write_same(sdkp
);
1987 req
->__data_len
= blk_rq_bytes(req
);
1988 req
->rq_flags
|= RQF_QUIET
;
1999 if (sd_is_zoned(sdkp
))
2000 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2002 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2003 "sd_done: completed %d of %d bytes\n",
2004 good_bytes
, scsi_bufflen(SCpnt
)));
2006 if (rq_data_dir(SCpnt
->request
) == READ
&& scsi_prot_sg_count(SCpnt
))
2007 sd_dif_complete(SCpnt
, good_bytes
);
2013 * spinup disk - called only in sd_revalidate_disk()
2016 sd_spinup_disk(struct scsi_disk
*sdkp
)
2018 unsigned char cmd
[10];
2019 unsigned long spintime_expire
= 0;
2020 int retries
, spintime
;
2021 unsigned int the_result
;
2022 struct scsi_sense_hdr sshdr
;
2023 int sense_valid
= 0;
2027 /* Spin up drives, as required. Only do this at boot time */
2028 /* Spinup needs to be done for module loads too. */
2033 cmd
[0] = TEST_UNIT_READY
;
2034 memset((void *) &cmd
[1], 0, 9);
2036 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2039 SD_MAX_RETRIES
, NULL
);
2042 * If the drive has indicated to us that it
2043 * doesn't have any media in it, don't bother
2044 * with any more polling.
2046 if (media_not_present(sdkp
, &sshdr
))
2050 sense_valid
= scsi_sense_valid(&sshdr
);
2052 } while (retries
< 3 &&
2053 (!scsi_status_is_good(the_result
) ||
2054 ((driver_byte(the_result
) & DRIVER_SENSE
) &&
2055 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2057 if ((driver_byte(the_result
) & DRIVER_SENSE
) == 0) {
2058 /* no sense, TUR either succeeded or failed
2059 * with a status error */
2060 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2061 sd_print_result(sdkp
, "Test Unit Ready failed",
2068 * The device does not want the automatic start to be issued.
2070 if (sdkp
->device
->no_start_on_add
)
2073 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2074 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2075 break; /* manual intervention required */
2076 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2077 break; /* standby */
2078 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2079 break; /* unavailable */
2081 * Issue command to spin up drive when not ready
2084 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2085 cmd
[0] = START_STOP
;
2086 cmd
[1] = 1; /* Return immediately */
2087 memset((void *) &cmd
[2], 0, 8);
2088 cmd
[4] = 1; /* Start spin cycle */
2089 if (sdkp
->device
->start_stop_pwr_cond
)
2091 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2093 SD_TIMEOUT
, SD_MAX_RETRIES
,
2095 spintime_expire
= jiffies
+ 100 * HZ
;
2098 /* Wait 1 second for next try */
2103 * Wait for USB flash devices with slow firmware.
2104 * Yes, this sense key/ASC combination shouldn't
2105 * occur here. It's characteristic of these devices.
2107 } else if (sense_valid
&&
2108 sshdr
.sense_key
== UNIT_ATTENTION
&&
2109 sshdr
.asc
== 0x28) {
2111 spintime_expire
= jiffies
+ 5 * HZ
;
2114 /* Wait 1 second for next try */
2117 /* we don't understand the sense code, so it's
2118 * probably pointless to loop */
2120 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2121 sd_print_sense_hdr(sdkp
, &sshdr
);
2126 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2129 if (scsi_status_is_good(the_result
))
2132 printk("not responding...\n");
2137 * Determine whether disk supports Data Integrity Field.
2139 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2141 struct scsi_device
*sdp
= sdkp
->device
;
2145 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2148 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2150 if (type
> T10_PI_TYPE3_PROTECTION
)
2152 else if (scsi_host_dif_capable(sdp
->host
, type
))
2155 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2158 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2159 " protection type %u. Disabling disk!\n",
2163 sd_printk(KERN_NOTICE
, sdkp
,
2164 "Enabling DIF Type %u protection\n", type
);
2167 sd_printk(KERN_NOTICE
, sdkp
,
2168 "Disabling DIF Type %u protection\n", type
);
2172 sdkp
->protection_type
= type
;
2177 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2178 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2181 if (driver_byte(the_result
) & DRIVER_SENSE
)
2182 sd_print_sense_hdr(sdkp
, sshdr
);
2184 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2187 * Set dirty bit for removable devices if not ready -
2188 * sometimes drives will not report this properly.
2190 if (sdp
->removable
&&
2191 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2192 set_media_not_present(sdkp
);
2195 * We used to set media_present to 0 here to indicate no media
2196 * in the drive, but some drives fail read capacity even with
2197 * media present, so we can't do that.
2199 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2203 #if RC16_LEN > SD_BUF_SIZE
2204 #error RC16_LEN must not be more than SD_BUF_SIZE
2207 #define READ_CAPACITY_RETRIES_ON_RESET 10
2210 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2211 * and the reported logical block size is bigger than 512 bytes. Note
2212 * that last_sector is a u64 and therefore logical_to_sectors() is not
2215 static bool sd_addressable_capacity(u64 lba
, unsigned int sector_size
)
2217 u64 last_sector
= (lba
+ 1ULL) << (ilog2(sector_size
) - 9);
2219 if (sizeof(sector_t
) == 4 && last_sector
> U32_MAX
)
2225 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2226 unsigned char *buffer
)
2228 unsigned char cmd
[16];
2229 struct scsi_sense_hdr sshdr
;
2230 int sense_valid
= 0;
2232 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2233 unsigned int alignment
;
2234 unsigned long long lba
;
2235 unsigned sector_size
;
2237 if (sdp
->no_read_capacity_16
)
2242 cmd
[0] = SERVICE_ACTION_IN_16
;
2243 cmd
[1] = SAI_READ_CAPACITY_16
;
2245 memset(buffer
, 0, RC16_LEN
);
2247 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2248 buffer
, RC16_LEN
, &sshdr
,
2249 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2251 if (media_not_present(sdkp
, &sshdr
))
2255 sense_valid
= scsi_sense_valid(&sshdr
);
2257 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2258 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2260 /* Invalid Command Operation Code or
2261 * Invalid Field in CDB, just retry
2262 * silently with RC10 */
2265 sshdr
.sense_key
== UNIT_ATTENTION
&&
2266 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2267 /* Device reset might occur several times,
2268 * give it one more chance */
2269 if (--reset_retries
> 0)
2274 } while (the_result
&& retries
);
2277 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2278 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2282 sector_size
= get_unaligned_be32(&buffer
[8]);
2283 lba
= get_unaligned_be64(&buffer
[0]);
2285 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2290 if (!sd_addressable_capacity(lba
, sector_size
)) {
2291 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2292 "kernel compiled with support for large block "
2298 /* Logical blocks per physical block exponent */
2299 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2302 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2304 /* Lowest aligned logical block */
2305 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2306 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2307 if (alignment
&& sdkp
->first_scan
)
2308 sd_printk(KERN_NOTICE
, sdkp
,
2309 "physical block alignment offset: %u\n", alignment
);
2311 if (buffer
[14] & 0x80) { /* LBPME */
2314 if (buffer
[14] & 0x40) /* LBPRZ */
2317 sd_config_discard(sdkp
, SD_LBP_WS16
);
2320 sdkp
->capacity
= lba
+ 1;
2324 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2325 unsigned char *buffer
)
2327 unsigned char cmd
[16];
2328 struct scsi_sense_hdr sshdr
;
2329 int sense_valid
= 0;
2331 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2333 unsigned sector_size
;
2336 cmd
[0] = READ_CAPACITY
;
2337 memset(&cmd
[1], 0, 9);
2338 memset(buffer
, 0, 8);
2340 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2342 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2344 if (media_not_present(sdkp
, &sshdr
))
2348 sense_valid
= scsi_sense_valid(&sshdr
);
2350 sshdr
.sense_key
== UNIT_ATTENTION
&&
2351 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2352 /* Device reset might occur several times,
2353 * give it one more chance */
2354 if (--reset_retries
> 0)
2359 } while (the_result
&& retries
);
2362 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2363 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2367 sector_size
= get_unaligned_be32(&buffer
[4]);
2368 lba
= get_unaligned_be32(&buffer
[0]);
2370 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2371 /* Some buggy (usb cardreader) devices return an lba of
2372 0xffffffff when the want to report a size of 0 (with
2373 which they really mean no media is present) */
2375 sdkp
->physical_block_size
= sector_size
;
2379 if (!sd_addressable_capacity(lba
, sector_size
)) {
2380 sd_printk(KERN_ERR
, sdkp
, "Too big for this kernel. Use a "
2381 "kernel compiled with support for large block "
2387 sdkp
->capacity
= lba
+ 1;
2388 sdkp
->physical_block_size
= sector_size
;
2392 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2394 if (sdp
->host
->max_cmd_len
< 16)
2396 if (sdp
->try_rc_10_first
)
2398 if (sdp
->scsi_level
> SCSI_SPC_2
)
2400 if (scsi_device_protection(sdp
))
2406 * read disk capacity
2409 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2412 struct scsi_device
*sdp
= sdkp
->device
;
2414 if (sd_try_rc16_first(sdp
)) {
2415 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2416 if (sector_size
== -EOVERFLOW
)
2418 if (sector_size
== -ENODEV
)
2420 if (sector_size
< 0)
2421 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2422 if (sector_size
< 0)
2425 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2426 if (sector_size
== -EOVERFLOW
)
2428 if (sector_size
< 0)
2430 if ((sizeof(sdkp
->capacity
) > 4) &&
2431 (sdkp
->capacity
> 0xffffffffULL
)) {
2432 int old_sector_size
= sector_size
;
2433 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2434 "Trying to use READ CAPACITY(16).\n");
2435 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2436 if (sector_size
< 0) {
2437 sd_printk(KERN_NOTICE
, sdkp
,
2438 "Using 0xffffffff as device size\n");
2439 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2440 sector_size
= old_sector_size
;
2446 /* Some devices are known to return the total number of blocks,
2447 * not the highest block number. Some devices have versions
2448 * which do this and others which do not. Some devices we might
2449 * suspect of doing this but we don't know for certain.
2451 * If we know the reported capacity is wrong, decrement it. If
2452 * we can only guess, then assume the number of blocks is even
2453 * (usually true but not always) and err on the side of lowering
2456 if (sdp
->fix_capacity
||
2457 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2458 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2459 "from its reported value: %llu\n",
2460 (unsigned long long) sdkp
->capacity
);
2465 if (sector_size
== 0) {
2467 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2471 if (sector_size
!= 512 &&
2472 sector_size
!= 1024 &&
2473 sector_size
!= 2048 &&
2474 sector_size
!= 4096) {
2475 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2478 * The user might want to re-format the drive with
2479 * a supported sectorsize. Once this happens, it
2480 * would be relatively trivial to set the thing up.
2481 * For this reason, we leave the thing in the table.
2485 * set a bogus sector size so the normal read/write
2486 * logic in the block layer will eventually refuse any
2487 * request on this device without tripping over power
2488 * of two sector size assumptions
2492 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2493 blk_queue_physical_block_size(sdp
->request_queue
,
2494 sdkp
->physical_block_size
);
2495 sdkp
->device
->sector_size
= sector_size
;
2497 if (sdkp
->capacity
> 0xffffffff)
2498 sdp
->use_16_for_rw
= 1;
2503 * Print disk capacity
2506 sd_print_capacity(struct scsi_disk
*sdkp
,
2507 sector_t old_capacity
)
2509 int sector_size
= sdkp
->device
->sector_size
;
2510 char cap_str_2
[10], cap_str_10
[10];
2512 string_get_size(sdkp
->capacity
, sector_size
,
2513 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2514 string_get_size(sdkp
->capacity
, sector_size
,
2515 STRING_UNITS_10
, cap_str_10
,
2516 sizeof(cap_str_10
));
2518 if (sdkp
->first_scan
|| old_capacity
!= sdkp
->capacity
) {
2519 sd_printk(KERN_NOTICE
, sdkp
,
2520 "%llu %d-byte logical blocks: (%s/%s)\n",
2521 (unsigned long long)sdkp
->capacity
,
2522 sector_size
, cap_str_10
, cap_str_2
);
2524 if (sdkp
->physical_block_size
!= sector_size
)
2525 sd_printk(KERN_NOTICE
, sdkp
,
2526 "%u-byte physical blocks\n",
2527 sdkp
->physical_block_size
);
2529 sd_zbc_print_zones(sdkp
);
2533 /* called with buffer of length 512 */
2535 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2536 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2537 struct scsi_sense_hdr
*sshdr
)
2539 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2540 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2545 * read write protect setting, if possible - called only in sd_revalidate_disk()
2546 * called with buffer of length SD_BUF_SIZE
2549 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2552 struct scsi_device
*sdp
= sdkp
->device
;
2553 struct scsi_mode_data data
;
2554 int old_wp
= sdkp
->write_prot
;
2556 set_disk_ro(sdkp
->disk
, 0);
2557 if (sdp
->skip_ms_page_3f
) {
2558 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2562 if (sdp
->use_192_bytes_for_3f
) {
2563 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2566 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2567 * We have to start carefully: some devices hang if we ask
2568 * for more than is available.
2570 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2573 * Second attempt: ask for page 0 When only page 0 is
2574 * implemented, a request for page 3F may return Sense Key
2575 * 5: Illegal Request, Sense Code 24: Invalid field in
2578 if (!scsi_status_is_good(res
))
2579 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2582 * Third attempt: ask 255 bytes, as we did earlier.
2584 if (!scsi_status_is_good(res
))
2585 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2589 if (!scsi_status_is_good(res
)) {
2590 sd_first_printk(KERN_WARNING
, sdkp
,
2591 "Test WP failed, assume Write Enabled\n");
2593 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2594 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2595 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2596 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2597 sdkp
->write_prot
? "on" : "off");
2598 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2604 * sd_read_cache_type - called only from sd_revalidate_disk()
2605 * called with buffer of length SD_BUF_SIZE
2608 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2611 struct scsi_device
*sdp
= sdkp
->device
;
2616 struct scsi_mode_data data
;
2617 struct scsi_sense_hdr sshdr
;
2618 int old_wce
= sdkp
->WCE
;
2619 int old_rcd
= sdkp
->RCD
;
2620 int old_dpofua
= sdkp
->DPOFUA
;
2623 if (sdkp
->cache_override
)
2627 if (sdp
->skip_ms_page_8
) {
2628 if (sdp
->type
== TYPE_RBC
)
2631 if (sdp
->skip_ms_page_3f
)
2634 if (sdp
->use_192_bytes_for_3f
)
2638 } else if (sdp
->type
== TYPE_RBC
) {
2646 /* cautiously ask */
2647 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2650 if (!scsi_status_is_good(res
))
2653 if (!data
.header_length
) {
2656 sd_first_printk(KERN_ERR
, sdkp
,
2657 "Missing header in MODE_SENSE response\n");
2660 /* that went OK, now ask for the proper length */
2664 * We're only interested in the first three bytes, actually.
2665 * But the data cache page is defined for the first 20.
2669 else if (len
> SD_BUF_SIZE
) {
2670 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2671 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2674 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2678 if (len
> first_len
)
2679 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2682 if (scsi_status_is_good(res
)) {
2683 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2685 while (offset
< len
) {
2686 u8 page_code
= buffer
[offset
] & 0x3F;
2687 u8 spf
= buffer
[offset
] & 0x40;
2689 if (page_code
== 8 || page_code
== 6) {
2690 /* We're interested only in the first 3 bytes.
2692 if (len
- offset
<= 2) {
2693 sd_first_printk(KERN_ERR
, sdkp
,
2694 "Incomplete mode parameter "
2698 modepage
= page_code
;
2702 /* Go to the next page */
2703 if (spf
&& len
- offset
> 3)
2704 offset
+= 4 + (buffer
[offset
+2] << 8) +
2706 else if (!spf
&& len
- offset
> 1)
2707 offset
+= 2 + buffer
[offset
+1];
2709 sd_first_printk(KERN_ERR
, sdkp
,
2711 "parameter data\n");
2717 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2721 if (modepage
== 8) {
2722 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2723 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2725 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2729 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2730 if (sdp
->broken_fua
) {
2731 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2733 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2734 !sdkp
->device
->use_16_for_rw
) {
2735 sd_first_printk(KERN_NOTICE
, sdkp
,
2736 "Uses READ/WRITE(6), disabling FUA\n");
2740 /* No cache flush allowed for write protected devices */
2741 if (sdkp
->WCE
&& sdkp
->write_prot
)
2744 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2745 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2746 sd_printk(KERN_NOTICE
, sdkp
,
2747 "Write cache: %s, read cache: %s, %s\n",
2748 sdkp
->WCE
? "enabled" : "disabled",
2749 sdkp
->RCD
? "disabled" : "enabled",
2750 sdkp
->DPOFUA
? "supports DPO and FUA"
2751 : "doesn't support DPO or FUA");
2757 if (scsi_sense_valid(&sshdr
) &&
2758 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2759 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2760 /* Invalid field in CDB */
2761 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2763 sd_first_printk(KERN_ERR
, sdkp
,
2764 "Asking for cache data failed\n");
2767 if (sdp
->wce_default_on
) {
2768 sd_first_printk(KERN_NOTICE
, sdkp
,
2769 "Assuming drive cache: write back\n");
2772 sd_first_printk(KERN_ERR
, sdkp
,
2773 "Assuming drive cache: write through\n");
2781 * The ATO bit indicates whether the DIF application tag is available
2782 * for use by the operating system.
2784 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2787 struct scsi_device
*sdp
= sdkp
->device
;
2788 struct scsi_mode_data data
;
2789 struct scsi_sense_hdr sshdr
;
2791 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2794 if (sdkp
->protection_type
== 0)
2797 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2798 SD_MAX_RETRIES
, &data
, &sshdr
);
2800 if (!scsi_status_is_good(res
) || !data
.header_length
||
2802 sd_first_printk(KERN_WARNING
, sdkp
,
2803 "getting Control mode page failed, assume no ATO\n");
2805 if (scsi_sense_valid(&sshdr
))
2806 sd_print_sense_hdr(sdkp
, &sshdr
);
2811 offset
= data
.header_length
+ data
.block_descriptor_length
;
2813 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2814 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2818 if ((buffer
[offset
+ 5] & 0x80) == 0)
2827 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2828 * @sdkp: disk to query
2830 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2832 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2833 const int vpd_len
= 64;
2834 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2837 /* Block Limits VPD */
2838 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2841 blk_queue_io_min(sdkp
->disk
->queue
,
2842 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2844 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2845 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2847 if (buffer
[3] == 0x3c) {
2848 unsigned int lba_count
, desc_count
;
2850 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2855 lba_count
= get_unaligned_be32(&buffer
[20]);
2856 desc_count
= get_unaligned_be32(&buffer
[24]);
2858 if (lba_count
&& desc_count
)
2859 sdkp
->max_unmap_blocks
= lba_count
;
2861 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2863 if (buffer
[32] & 0x80)
2864 sdkp
->unmap_alignment
=
2865 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2867 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2869 if (sdkp
->max_unmap_blocks
)
2870 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2872 sd_config_discard(sdkp
, SD_LBP_WS16
);
2874 } else { /* LBP VPD page tells us what to use */
2875 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2876 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2877 else if (sdkp
->lbpws
)
2878 sd_config_discard(sdkp
, SD_LBP_WS16
);
2879 else if (sdkp
->lbpws10
)
2880 sd_config_discard(sdkp
, SD_LBP_WS10
);
2881 else if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2882 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2884 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2893 * sd_read_block_characteristics - Query block dev. characteristics
2894 * @sdkp: disk to query
2896 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2898 struct request_queue
*q
= sdkp
->disk
->queue
;
2899 unsigned char *buffer
;
2901 const int vpd_len
= 64;
2903 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2906 /* Block Device Characteristics VPD */
2907 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2910 rot
= get_unaligned_be16(&buffer
[4]);
2913 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
, q
);
2914 queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM
, q
);
2917 if (sdkp
->device
->type
== TYPE_ZBC
) {
2919 q
->limits
.zoned
= BLK_ZONED_HM
;
2921 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2922 if (sdkp
->zoned
== 1)
2924 q
->limits
.zoned
= BLK_ZONED_HA
;
2927 * Treat drive-managed devices as
2928 * regular block devices.
2930 q
->limits
.zoned
= BLK_ZONED_NONE
;
2932 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
2933 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
2934 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
2941 * sd_read_block_provisioning - Query provisioning VPD page
2942 * @sdkp: disk to query
2944 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
2946 unsigned char *buffer
;
2947 const int vpd_len
= 8;
2949 if (sdkp
->lbpme
== 0)
2952 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2954 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
2958 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
2959 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2960 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
2966 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2968 struct scsi_device
*sdev
= sdkp
->device
;
2970 if (sdev
->host
->no_write_same
) {
2971 sdev
->no_write_same
= 1;
2976 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
2977 /* too large values might cause issues with arcmsr */
2978 int vpd_buf_len
= 64;
2980 sdev
->no_report_opcodes
= 1;
2982 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
2983 * CODES is unsupported and the device has an ATA
2984 * Information VPD page (SAT).
2986 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
2987 sdev
->no_write_same
= 1;
2990 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
2993 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
2998 * sd_revalidate_disk - called the first time a new disk is seen,
2999 * performs disk spin up, read_capacity, etc.
3000 * @disk: struct gendisk we care about
3002 static int sd_revalidate_disk(struct gendisk
*disk
)
3004 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3005 struct scsi_device
*sdp
= sdkp
->device
;
3006 struct request_queue
*q
= sdkp
->disk
->queue
;
3007 sector_t old_capacity
= sdkp
->capacity
;
3008 unsigned char *buffer
;
3009 unsigned int dev_max
, rw_max
;
3011 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3012 "sd_revalidate_disk\n"));
3015 * If the device is offline, don't try and read capacity or any
3016 * of the other niceties.
3018 if (!scsi_device_online(sdp
))
3021 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3023 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3024 "allocation failure.\n");
3028 sd_spinup_disk(sdkp
);
3031 * Without media there is no reason to ask; moreover, some devices
3032 * react badly if we do.
3034 if (sdkp
->media_present
) {
3035 sd_read_capacity(sdkp
, buffer
);
3037 if (scsi_device_supports_vpd(sdp
)) {
3038 sd_read_block_provisioning(sdkp
);
3039 sd_read_block_limits(sdkp
);
3040 sd_read_block_characteristics(sdkp
);
3041 sd_zbc_read_zones(sdkp
, buffer
);
3044 sd_print_capacity(sdkp
, old_capacity
);
3046 sd_read_write_protect_flag(sdkp
, buffer
);
3047 sd_read_cache_type(sdkp
, buffer
);
3048 sd_read_app_tag_own(sdkp
, buffer
);
3049 sd_read_write_same(sdkp
, buffer
);
3052 sdkp
->first_scan
= 0;
3055 * We now have all cache related info, determine how we deal
3056 * with flush requests.
3058 sd_set_flush_flag(sdkp
);
3060 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3061 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3063 /* Some devices report a maximum block count for READ/WRITE requests. */
3064 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3065 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3068 * Use the device's preferred I/O size for reads and writes
3069 * unless the reported value is unreasonably small, large, or
3072 if (sdkp
->opt_xfer_blocks
&&
3073 sdkp
->opt_xfer_blocks
<= dev_max
&&
3074 sdkp
->opt_xfer_blocks
<= SD_DEF_XFER_BLOCKS
&&
3075 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
) >= PAGE_SIZE
) {
3076 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3077 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3079 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3080 (sector_t
)BLK_DEF_MAX_SECTORS
);
3082 /* Combine with controller limits */
3083 q
->limits
.max_sectors
= min(rw_max
, queue_max_hw_sectors(q
));
3085 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3086 sd_config_write_same(sdkp
);
3094 * sd_unlock_native_capacity - unlock native capacity
3095 * @disk: struct gendisk to set capacity for
3097 * Block layer calls this function if it detects that partitions
3098 * on @disk reach beyond the end of the device. If the SCSI host
3099 * implements ->unlock_native_capacity() method, it's invoked to
3100 * give it a chance to adjust the device capacity.
3103 * Defined by block layer. Might sleep.
3105 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3107 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3109 if (sdev
->host
->hostt
->unlock_native_capacity
)
3110 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3114 * sd_format_disk_name - format disk name
3115 * @prefix: name prefix - ie. "sd" for SCSI disks
3116 * @index: index of the disk to format name for
3117 * @buf: output buffer
3118 * @buflen: length of the output buffer
3120 * SCSI disk names starts at sda. The 26th device is sdz and the
3121 * 27th is sdaa. The last one for two lettered suffix is sdzz
3122 * which is followed by sdaaa.
3124 * This is basically 26 base counting with one extra 'nil' entry
3125 * at the beginning from the second digit on and can be
3126 * determined using similar method as 26 base conversion with the
3127 * index shifted -1 after each digit is computed.
3133 * 0 on success, -errno on failure.
3135 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3137 const int base
= 'z' - 'a' + 1;
3138 char *begin
= buf
+ strlen(prefix
);
3139 char *end
= buf
+ buflen
;
3149 *--p
= 'a' + (index
% unit
);
3150 index
= (index
/ unit
) - 1;
3151 } while (index
>= 0);
3153 memmove(begin
, p
, end
- p
);
3154 memcpy(buf
, prefix
, strlen(prefix
));
3160 * The asynchronous part of sd_probe
3162 static void sd_probe_async(void *data
, async_cookie_t cookie
)
3164 struct scsi_disk
*sdkp
= data
;
3165 struct scsi_device
*sdp
;
3172 index
= sdkp
->index
;
3173 dev
= &sdp
->sdev_gendev
;
3175 gd
->major
= sd_major((index
& 0xf0) >> 4);
3176 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3177 gd
->minors
= SD_MINORS
;
3179 gd
->fops
= &sd_fops
;
3180 gd
->private_data
= &sdkp
->driver
;
3181 gd
->queue
= sdkp
->device
->request_queue
;
3183 /* defaults, until the device tells us otherwise */
3184 sdp
->sector_size
= 512;
3186 sdkp
->media_present
= 1;
3187 sdkp
->write_prot
= 0;
3188 sdkp
->cache_override
= 0;
3192 sdkp
->first_scan
= 1;
3193 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3195 sd_revalidate_disk(gd
);
3197 gd
->flags
= GENHD_FL_EXT_DEVT
;
3198 if (sdp
->removable
) {
3199 gd
->flags
|= GENHD_FL_REMOVABLE
;
3200 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3203 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3204 device_add_disk(dev
, gd
);
3206 sd_dif_config_host(sdkp
);
3208 sd_revalidate_disk(gd
);
3210 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3211 sdp
->removable
? "removable " : "");
3212 scsi_autopm_put_device(sdp
);
3213 put_device(&sdkp
->dev
);
3217 * sd_probe - called during driver initialization and whenever a
3218 * new scsi device is attached to the system. It is called once
3219 * for each scsi device (not just disks) present.
3220 * @dev: pointer to device object
3222 * Returns 0 if successful (or not interested in this scsi device
3223 * (e.g. scanner)); 1 when there is an error.
3225 * Note: this function is invoked from the scsi mid-level.
3226 * This function sets up the mapping between a given
3227 * <host,channel,id,lun> (found in sdp) and new device name
3228 * (e.g. /dev/sda). More precisely it is the block device major
3229 * and minor number that is chosen here.
3231 * Assume sd_probe is not re-entrant (for time being)
3232 * Also think about sd_probe() and sd_remove() running coincidentally.
3234 static int sd_probe(struct device
*dev
)
3236 struct scsi_device
*sdp
= to_scsi_device(dev
);
3237 struct scsi_disk
*sdkp
;
3242 scsi_autopm_get_device(sdp
);
3244 if (sdp
->type
!= TYPE_DISK
&&
3245 sdp
->type
!= TYPE_ZBC
&&
3246 sdp
->type
!= TYPE_MOD
&&
3247 sdp
->type
!= TYPE_RBC
)
3250 #ifndef CONFIG_BLK_DEV_ZONED
3251 if (sdp
->type
== TYPE_ZBC
)
3254 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3258 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3262 gd
= alloc_disk(SD_MINORS
);
3267 if (!ida_pre_get(&sd_index_ida
, GFP_KERNEL
))
3270 spin_lock(&sd_index_lock
);
3271 error
= ida_get_new(&sd_index_ida
, &index
);
3272 spin_unlock(&sd_index_lock
);
3273 } while (error
== -EAGAIN
);
3276 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3280 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3282 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3283 goto out_free_index
;
3287 sdkp
->driver
= &sd_template
;
3289 sdkp
->index
= index
;
3290 atomic_set(&sdkp
->openers
, 0);
3291 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3293 if (!sdp
->request_queue
->rq_timeout
) {
3294 if (sdp
->type
!= TYPE_MOD
)
3295 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3297 blk_queue_rq_timeout(sdp
->request_queue
,
3301 device_initialize(&sdkp
->dev
);
3302 sdkp
->dev
.parent
= dev
;
3303 sdkp
->dev
.class = &sd_disk_class
;
3304 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3306 error
= device_add(&sdkp
->dev
);
3308 goto out_free_index
;
3311 dev_set_drvdata(dev
, sdkp
);
3313 get_device(&sdkp
->dev
); /* prevent release before async_schedule */
3314 async_schedule_domain(sd_probe_async
, sdkp
, &scsi_sd_probe_domain
);
3319 spin_lock(&sd_index_lock
);
3320 ida_remove(&sd_index_ida
, index
);
3321 spin_unlock(&sd_index_lock
);
3327 scsi_autopm_put_device(sdp
);
3332 * sd_remove - called whenever a scsi disk (previously recognized by
3333 * sd_probe) is detached from the system. It is called (potentially
3334 * multiple times) during sd module unload.
3335 * @dev: pointer to device object
3337 * Note: this function is invoked from the scsi mid-level.
3338 * This function potentially frees up a device name (e.g. /dev/sdc)
3339 * that could be re-used by a subsequent sd_probe().
3340 * This function is not called when the built-in sd driver is "exit-ed".
3342 static int sd_remove(struct device
*dev
)
3344 struct scsi_disk
*sdkp
;
3347 sdkp
= dev_get_drvdata(dev
);
3348 devt
= disk_devt(sdkp
->disk
);
3349 scsi_autopm_get_device(sdkp
->device
);
3351 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3352 async_synchronize_full_domain(&scsi_sd_probe_domain
);
3353 device_del(&sdkp
->dev
);
3354 del_gendisk(sdkp
->disk
);
3357 sd_zbc_remove(sdkp
);
3359 blk_register_region(devt
, SD_MINORS
, NULL
,
3360 sd_default_probe
, NULL
, NULL
);
3362 mutex_lock(&sd_ref_mutex
);
3363 dev_set_drvdata(dev
, NULL
);
3364 put_device(&sdkp
->dev
);
3365 mutex_unlock(&sd_ref_mutex
);
3371 * scsi_disk_release - Called to free the scsi_disk structure
3372 * @dev: pointer to embedded class device
3374 * sd_ref_mutex must be held entering this routine. Because it is
3375 * called on last put, you should always use the scsi_disk_get()
3376 * scsi_disk_put() helpers which manipulate the semaphore directly
3377 * and never do a direct put_device.
3379 static void scsi_disk_release(struct device
*dev
)
3381 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3382 struct gendisk
*disk
= sdkp
->disk
;
3384 spin_lock(&sd_index_lock
);
3385 ida_remove(&sd_index_ida
, sdkp
->index
);
3386 spin_unlock(&sd_index_lock
);
3388 disk
->private_data
= NULL
;
3390 put_device(&sdkp
->device
->sdev_gendev
);
3395 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3397 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3398 struct scsi_sense_hdr sshdr
;
3399 struct scsi_device
*sdp
= sdkp
->device
;
3403 cmd
[4] |= 1; /* START */
3405 if (sdp
->start_stop_pwr_cond
)
3406 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3408 if (!scsi_device_online(sdp
))
3411 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3412 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3414 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3415 if (driver_byte(res
) & DRIVER_SENSE
)
3416 sd_print_sense_hdr(sdkp
, &sshdr
);
3417 if (scsi_sense_valid(&sshdr
) &&
3418 /* 0x3a is medium not present */
3423 /* SCSI error codes must not go to the generic layer */
3431 * Send a SYNCHRONIZE CACHE instruction down to the device through
3432 * the normal SCSI command structure. Wait for the command to
3435 static void sd_shutdown(struct device
*dev
)
3437 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3440 return; /* this can happen */
3442 if (pm_runtime_suspended(dev
))
3445 if (sdkp
->WCE
&& sdkp
->media_present
) {
3446 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3447 sd_sync_cache(sdkp
);
3450 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3451 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3452 sd_start_stop_device(sdkp
, 0);
3456 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3458 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3461 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3464 if (sdkp
->WCE
&& sdkp
->media_present
) {
3465 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3466 ret
= sd_sync_cache(sdkp
);
3468 /* ignore OFFLINE device */
3475 if (sdkp
->device
->manage_start_stop
) {
3476 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3477 /* an error is not worth aborting a system sleep */
3478 ret
= sd_start_stop_device(sdkp
, 0);
3479 if (ignore_stop_errors
)
3487 static int sd_suspend_system(struct device
*dev
)
3489 return sd_suspend_common(dev
, true);
3492 static int sd_suspend_runtime(struct device
*dev
)
3494 return sd_suspend_common(dev
, false);
3497 static int sd_resume(struct device
*dev
)
3499 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3501 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3504 if (!sdkp
->device
->manage_start_stop
)
3507 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3508 return sd_start_stop_device(sdkp
, 1);
3512 * init_sd - entry point for this driver (both when built in or when
3515 * Note: this function registers this driver with the scsi mid-level.
3517 static int __init
init_sd(void)
3519 int majors
= 0, i
, err
;
3521 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3523 for (i
= 0; i
< SD_MAJORS
; i
++) {
3524 if (register_blkdev(sd_major(i
), "sd") != 0)
3527 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3528 sd_default_probe
, NULL
, NULL
);
3534 err
= class_register(&sd_disk_class
);
3538 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3540 if (!sd_cdb_cache
) {
3541 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3546 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3548 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3553 err
= scsi_register_driver(&sd_template
.gendrv
);
3555 goto err_out_driver
;
3560 mempool_destroy(sd_cdb_pool
);
3563 kmem_cache_destroy(sd_cdb_cache
);
3566 class_unregister(&sd_disk_class
);
3568 for (i
= 0; i
< SD_MAJORS
; i
++)
3569 unregister_blkdev(sd_major(i
), "sd");
3574 * exit_sd - exit point for this driver (when it is a module).
3576 * Note: this function unregisters this driver from the scsi mid-level.
3578 static void __exit
exit_sd(void)
3582 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3584 scsi_unregister_driver(&sd_template
.gendrv
);
3585 mempool_destroy(sd_cdb_pool
);
3586 kmem_cache_destroy(sd_cdb_cache
);
3588 class_unregister(&sd_disk_class
);
3590 for (i
= 0; i
< SD_MAJORS
; i
++) {
3591 blk_unregister_region(sd_major(i
), SD_MINORS
);
3592 unregister_blkdev(sd_major(i
), "sd");
3596 module_init(init_sd
);
3597 module_exit(exit_sd
);
3599 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3600 struct scsi_sense_hdr
*sshdr
)
3602 scsi_print_sense_hdr(sdkp
->device
,
3603 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3606 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3609 const char *hb_string
= scsi_hostbyte_string(result
);
3610 const char *db_string
= scsi_driverbyte_string(result
);
3612 if (hb_string
|| db_string
)
3613 sd_printk(KERN_INFO
, sdkp
,
3614 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3615 hb_string
? hb_string
: "invalid",
3616 db_string
? db_string
: "invalid");
3618 sd_printk(KERN_INFO
, sdkp
,
3619 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3620 msg
, host_byte(result
), driver_byte(result
));