1 // SPDX-License-Identifier: GPL-2.0-only
3 * sd.c Copyright (C) 1992 Drew Eckhardt
4 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
6 * Linux scsi disk driver
7 * Initial versions: Drew Eckhardt
8 * Subsequent revisions: Eric Youngdale
9 * Modification history:
10 * - Drew Eckhardt <drew@colorado.edu> original
11 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
12 * outstanding request, and other enhancements.
13 * Support loadable low-level scsi drivers.
14 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
15 * eight major numbers.
16 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
17 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
18 * sd_init and cleanups.
19 * - Alex Davis <letmein@erols.com> Fix problem where partition info
20 * not being read in sd_open. Fix problem where removable media
21 * could be ejected after sd_open.
22 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
23 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
24 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
25 * Support 32k/1M disks.
27 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
28 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
29 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
30 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
31 * - entering other commands: SCSI_LOG_HLQUEUE level 3
32 * Note: when the logging level is set by the user, it must be greater
33 * than the level indicated above to trigger output.
36 #include <linux/module.h>
38 #include <linux/kernel.h>
40 #include <linux/bio.h>
41 #include <linux/genhd.h>
42 #include <linux/hdreg.h>
43 #include <linux/errno.h>
44 #include <linux/idr.h>
45 #include <linux/interrupt.h>
46 #include <linux/init.h>
47 #include <linux/blkdev.h>
48 #include <linux/blkpg.h>
49 #include <linux/blk-pm.h>
50 #include <linux/delay.h>
51 #include <linux/mutex.h>
52 #include <linux/string_helpers.h>
53 #include <linux/async.h>
54 #include <linux/slab.h>
55 #include <linux/sed-opal.h>
56 #include <linux/pm_runtime.h>
58 #include <linux/t10-pi.h>
59 #include <linux/uaccess.h>
60 #include <asm/unaligned.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_dbg.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_driver.h>
67 #include <scsi/scsi_eh.h>
68 #include <scsi/scsi_host.h>
69 #include <scsi/scsi_ioctl.h>
70 #include <scsi/scsicam.h>
73 #include "scsi_priv.h"
74 #include "scsi_logging.h"
76 MODULE_AUTHOR("Eric Youngdale");
77 MODULE_DESCRIPTION("SCSI disk (sd) driver");
78 MODULE_LICENSE("GPL");
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
94 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
95 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
98 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
99 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
103 static void sd_config_discard(struct scsi_disk
*, unsigned int);
104 static void sd_config_write_same(struct scsi_disk
*);
105 static int sd_revalidate_disk(struct gendisk
*);
106 static void sd_unlock_native_capacity(struct gendisk
*disk
);
107 static int sd_probe(struct device
*);
108 static int sd_remove(struct device
*);
109 static void sd_shutdown(struct device
*);
110 static int sd_suspend_system(struct device
*);
111 static int sd_suspend_runtime(struct device
*);
112 static int sd_resume(struct device
*);
113 static void sd_rescan(struct device
*);
114 static blk_status_t
sd_init_command(struct scsi_cmnd
*SCpnt
);
115 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
116 static int sd_done(struct scsi_cmnd
*);
117 static void sd_eh_reset(struct scsi_cmnd
*);
118 static int sd_eh_action(struct scsi_cmnd
*, int);
119 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
120 static void scsi_disk_release(struct device
*cdev
);
122 static DEFINE_IDA(sd_index_ida
);
124 /* This semaphore is used to mediate the 0->1 reference get in the
125 * face of object destruction (i.e. we can't allow a get on an
126 * object after last put) */
127 static DEFINE_MUTEX(sd_ref_mutex
);
129 static struct kmem_cache
*sd_cdb_cache
;
130 static mempool_t
*sd_cdb_pool
;
131 static mempool_t
*sd_page_pool
;
133 static const char *sd_cache_types
[] = {
134 "write through", "none", "write back",
135 "write back, no read (daft)"
138 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
140 bool wc
= false, fua
= false;
148 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
152 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
153 const char *buf
, size_t count
)
155 int ct
, rcd
, wce
, sp
;
156 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
157 struct scsi_device
*sdp
= sdkp
->device
;
160 struct scsi_mode_data data
;
161 struct scsi_sense_hdr sshdr
;
162 static const char temp
[] = "temporary ";
165 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
166 /* no cache control on RBC devices; theoretically they
167 * can do it, but there's probably so many exceptions
168 * it's not worth the risk */
171 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
172 buf
+= sizeof(temp
) - 1;
173 sdkp
->cache_override
= 1;
175 sdkp
->cache_override
= 0;
178 ct
= sysfs_match_string(sd_cache_types
, buf
);
182 rcd
= ct
& 0x01 ? 1 : 0;
183 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
185 if (sdkp
->cache_override
) {
188 sd_set_flush_flag(sdkp
);
192 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
193 sdkp
->max_retries
, &data
, NULL
))
195 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
196 data
.block_descriptor_length
);
197 buffer_data
= buffer
+ data
.header_length
+
198 data
.block_descriptor_length
;
199 buffer_data
[2] &= ~0x05;
200 buffer_data
[2] |= wce
<< 2 | rcd
;
201 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
202 buffer_data
[0] &= ~0x80;
205 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
206 * received mode parameter buffer before doing MODE SELECT.
208 data
.device_specific
= 0;
210 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
211 sdkp
->max_retries
, &data
, &sshdr
)) {
212 if (scsi_sense_valid(&sshdr
))
213 sd_print_sense_hdr(sdkp
, &sshdr
);
216 sd_revalidate_disk(sdkp
->disk
);
221 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
224 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
225 struct scsi_device
*sdp
= sdkp
->device
;
227 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
231 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
232 const char *buf
, size_t count
)
234 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
235 struct scsi_device
*sdp
= sdkp
->device
;
238 if (!capable(CAP_SYS_ADMIN
))
241 if (kstrtobool(buf
, &v
))
244 sdp
->manage_start_stop
= v
;
248 static DEVICE_ATTR_RW(manage_start_stop
);
251 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
253 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
255 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
259 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
260 const char *buf
, size_t count
)
263 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
264 struct scsi_device
*sdp
= sdkp
->device
;
266 if (!capable(CAP_SYS_ADMIN
))
269 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
272 if (kstrtobool(buf
, &v
))
275 sdp
->allow_restart
= v
;
279 static DEVICE_ATTR_RW(allow_restart
);
282 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
284 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
285 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
287 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
289 static DEVICE_ATTR_RW(cache_type
);
292 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
294 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
296 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
298 static DEVICE_ATTR_RO(FUA
);
301 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
304 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
306 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
310 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
311 const char *buf
, size_t count
)
313 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
317 if (!capable(CAP_SYS_ADMIN
))
320 err
= kstrtouint(buf
, 10, &val
);
325 if (val
<= T10_PI_TYPE3_PROTECTION
)
326 sdkp
->protection_type
= val
;
330 static DEVICE_ATTR_RW(protection_type
);
333 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
336 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
337 struct scsi_device
*sdp
= sdkp
->device
;
338 unsigned int dif
, dix
;
340 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
341 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
343 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
349 return sprintf(buf
, "none\n");
351 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
353 static DEVICE_ATTR_RO(protection_mode
);
356 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
358 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
360 return sprintf(buf
, "%u\n", sdkp
->ATO
);
362 static DEVICE_ATTR_RO(app_tag_own
);
365 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
368 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
370 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
372 static DEVICE_ATTR_RO(thin_provisioning
);
374 /* sysfs_match_string() requires dense arrays */
375 static const char *lbp_mode
[] = {
376 [SD_LBP_FULL
] = "full",
377 [SD_LBP_UNMAP
] = "unmap",
378 [SD_LBP_WS16
] = "writesame_16",
379 [SD_LBP_WS10
] = "writesame_10",
380 [SD_LBP_ZERO
] = "writesame_zero",
381 [SD_LBP_DISABLE
] = "disabled",
385 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
388 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
390 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
394 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
395 const char *buf
, size_t count
)
397 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
398 struct scsi_device
*sdp
= sdkp
->device
;
401 if (!capable(CAP_SYS_ADMIN
))
404 if (sd_is_zoned(sdkp
)) {
405 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
409 if (sdp
->type
!= TYPE_DISK
)
412 mode
= sysfs_match_string(lbp_mode
, buf
);
416 sd_config_discard(sdkp
, mode
);
420 static DEVICE_ATTR_RW(provisioning_mode
);
422 /* sysfs_match_string() requires dense arrays */
423 static const char *zeroing_mode
[] = {
424 [SD_ZERO_WRITE
] = "write",
425 [SD_ZERO_WS
] = "writesame",
426 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
427 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
431 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
434 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
436 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
440 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
441 const char *buf
, size_t count
)
443 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
446 if (!capable(CAP_SYS_ADMIN
))
449 mode
= sysfs_match_string(zeroing_mode
, buf
);
453 sdkp
->zeroing_mode
= mode
;
457 static DEVICE_ATTR_RW(zeroing_mode
);
460 max_medium_access_timeouts_show(struct device
*dev
,
461 struct device_attribute
*attr
, char *buf
)
463 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
465 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
469 max_medium_access_timeouts_store(struct device
*dev
,
470 struct device_attribute
*attr
, const char *buf
,
473 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
476 if (!capable(CAP_SYS_ADMIN
))
479 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
481 return err
? err
: count
;
483 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
486 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
489 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
491 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
495 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
496 const char *buf
, size_t count
)
498 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
499 struct scsi_device
*sdp
= sdkp
->device
;
503 if (!capable(CAP_SYS_ADMIN
))
506 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
509 err
= kstrtoul(buf
, 10, &max
);
515 sdp
->no_write_same
= 1;
516 else if (max
<= SD_MAX_WS16_BLOCKS
) {
517 sdp
->no_write_same
= 0;
518 sdkp
->max_ws_blocks
= max
;
521 sd_config_write_same(sdkp
);
525 static DEVICE_ATTR_RW(max_write_same_blocks
);
528 zoned_cap_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
530 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
532 if (sdkp
->device
->type
== TYPE_ZBC
)
533 return sprintf(buf
, "host-managed\n");
534 if (sdkp
->zoned
== 1)
535 return sprintf(buf
, "host-aware\n");
536 if (sdkp
->zoned
== 2)
537 return sprintf(buf
, "drive-managed\n");
538 return sprintf(buf
, "none\n");
540 static DEVICE_ATTR_RO(zoned_cap
);
543 max_retries_store(struct device
*dev
, struct device_attribute
*attr
,
544 const char *buf
, size_t count
)
546 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
547 struct scsi_device
*sdev
= sdkp
->device
;
550 err
= kstrtoint(buf
, 10, &retries
);
554 if (retries
== SCSI_CMD_RETRIES_NO_LIMIT
|| retries
<= SD_MAX_RETRIES
) {
555 sdkp
->max_retries
= retries
;
559 sdev_printk(KERN_ERR
, sdev
, "max_retries must be between -1 and %d\n",
565 max_retries_show(struct device
*dev
, struct device_attribute
*attr
,
568 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
570 return sprintf(buf
, "%d\n", sdkp
->max_retries
);
573 static DEVICE_ATTR_RW(max_retries
);
575 static struct attribute
*sd_disk_attrs
[] = {
576 &dev_attr_cache_type
.attr
,
578 &dev_attr_allow_restart
.attr
,
579 &dev_attr_manage_start_stop
.attr
,
580 &dev_attr_protection_type
.attr
,
581 &dev_attr_protection_mode
.attr
,
582 &dev_attr_app_tag_own
.attr
,
583 &dev_attr_thin_provisioning
.attr
,
584 &dev_attr_provisioning_mode
.attr
,
585 &dev_attr_zeroing_mode
.attr
,
586 &dev_attr_max_write_same_blocks
.attr
,
587 &dev_attr_max_medium_access_timeouts
.attr
,
588 &dev_attr_zoned_cap
.attr
,
589 &dev_attr_max_retries
.attr
,
592 ATTRIBUTE_GROUPS(sd_disk
);
594 static struct class sd_disk_class
= {
596 .owner
= THIS_MODULE
,
597 .dev_release
= scsi_disk_release
,
598 .dev_groups
= sd_disk_groups
,
601 static const struct dev_pm_ops sd_pm_ops
= {
602 .suspend
= sd_suspend_system
,
604 .poweroff
= sd_suspend_system
,
605 .restore
= sd_resume
,
606 .runtime_suspend
= sd_suspend_runtime
,
607 .runtime_resume
= sd_resume
,
610 static struct scsi_driver sd_template
= {
613 .owner
= THIS_MODULE
,
615 .probe_type
= PROBE_PREFER_ASYNCHRONOUS
,
617 .shutdown
= sd_shutdown
,
621 .init_command
= sd_init_command
,
622 .uninit_command
= sd_uninit_command
,
624 .eh_action
= sd_eh_action
,
625 .eh_reset
= sd_eh_reset
,
629 * Don't request a new module, as that could deadlock in multipath
632 static void sd_default_probe(dev_t devt
)
637 * Device no to disk mapping:
639 * major disc2 disc p1
640 * |............|.............|....|....| <- dev_t
643 * Inside a major, we have 16k disks, however mapped non-
644 * contiguously. The first 16 disks are for major0, the next
645 * ones with major1, ... Disk 256 is for major0 again, disk 272
647 * As we stay compatible with our numbering scheme, we can reuse
648 * the well-know SCSI majors 8, 65--71, 136--143.
650 static int sd_major(int major_idx
)
654 return SCSI_DISK0_MAJOR
;
656 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
658 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
661 return 0; /* shut up gcc */
665 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
667 struct scsi_disk
*sdkp
= NULL
;
669 mutex_lock(&sd_ref_mutex
);
671 if (disk
->private_data
) {
672 sdkp
= scsi_disk(disk
);
673 if (scsi_device_get(sdkp
->device
) == 0)
674 get_device(&sdkp
->dev
);
678 mutex_unlock(&sd_ref_mutex
);
682 static void scsi_disk_put(struct scsi_disk
*sdkp
)
684 struct scsi_device
*sdev
= sdkp
->device
;
686 mutex_lock(&sd_ref_mutex
);
687 put_device(&sdkp
->dev
);
688 scsi_device_put(sdev
);
689 mutex_unlock(&sd_ref_mutex
);
692 #ifdef CONFIG_BLK_SED_OPAL
693 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
694 size_t len
, bool send
)
696 struct scsi_disk
*sdkp
= data
;
697 struct scsi_device
*sdev
= sdkp
->device
;
701 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
703 put_unaligned_be16(spsp
, &cdb
[2]);
704 put_unaligned_be32(len
, &cdb
[6]);
706 ret
= scsi_execute(sdev
, cdb
, send
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
,
707 buffer
, len
, NULL
, NULL
, SD_TIMEOUT
, sdkp
->max_retries
, 0,
709 return ret
<= 0 ? ret
: -EIO
;
711 #endif /* CONFIG_BLK_SED_OPAL */
714 * Look up the DIX operation based on whether the command is read or
715 * write and whether dix and dif are enabled.
717 static unsigned int sd_prot_op(bool write
, bool dix
, bool dif
)
719 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
720 static const unsigned int ops
[] = { /* wrt dix dif */
721 SCSI_PROT_NORMAL
, /* 0 0 0 */
722 SCSI_PROT_READ_STRIP
, /* 0 0 1 */
723 SCSI_PROT_READ_INSERT
, /* 0 1 0 */
724 SCSI_PROT_READ_PASS
, /* 0 1 1 */
725 SCSI_PROT_NORMAL
, /* 1 0 0 */
726 SCSI_PROT_WRITE_INSERT
, /* 1 0 1 */
727 SCSI_PROT_WRITE_STRIP
, /* 1 1 0 */
728 SCSI_PROT_WRITE_PASS
, /* 1 1 1 */
731 return ops
[write
<< 2 | dix
<< 1 | dif
];
735 * Returns a mask of the protection flags that are valid for a given DIX
738 static unsigned int sd_prot_flag_mask(unsigned int prot_op
)
740 static const unsigned int flag_mask
[] = {
741 [SCSI_PROT_NORMAL
] = 0,
743 [SCSI_PROT_READ_STRIP
] = SCSI_PROT_TRANSFER_PI
|
744 SCSI_PROT_GUARD_CHECK
|
745 SCSI_PROT_REF_CHECK
|
746 SCSI_PROT_REF_INCREMENT
,
748 [SCSI_PROT_READ_INSERT
] = SCSI_PROT_REF_INCREMENT
|
749 SCSI_PROT_IP_CHECKSUM
,
751 [SCSI_PROT_READ_PASS
] = SCSI_PROT_TRANSFER_PI
|
752 SCSI_PROT_GUARD_CHECK
|
753 SCSI_PROT_REF_CHECK
|
754 SCSI_PROT_REF_INCREMENT
|
755 SCSI_PROT_IP_CHECKSUM
,
757 [SCSI_PROT_WRITE_INSERT
] = SCSI_PROT_TRANSFER_PI
|
758 SCSI_PROT_REF_INCREMENT
,
760 [SCSI_PROT_WRITE_STRIP
] = SCSI_PROT_GUARD_CHECK
|
761 SCSI_PROT_REF_CHECK
|
762 SCSI_PROT_REF_INCREMENT
|
763 SCSI_PROT_IP_CHECKSUM
,
765 [SCSI_PROT_WRITE_PASS
] = SCSI_PROT_TRANSFER_PI
|
766 SCSI_PROT_GUARD_CHECK
|
767 SCSI_PROT_REF_CHECK
|
768 SCSI_PROT_REF_INCREMENT
|
769 SCSI_PROT_IP_CHECKSUM
,
772 return flag_mask
[prot_op
];
775 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
776 unsigned int dix
, unsigned int dif
)
778 struct bio
*bio
= scmd
->request
->bio
;
779 unsigned int prot_op
= sd_prot_op(rq_data_dir(scmd
->request
), dix
, dif
);
780 unsigned int protect
= 0;
782 if (dix
) { /* DIX Type 0, 1, 2, 3 */
783 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
784 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
786 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
787 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
790 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
791 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
793 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
794 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
797 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
798 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
800 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
801 protect
= 3 << 5; /* Disable target PI checking */
803 protect
= 1 << 5; /* Enable target PI checking */
806 scsi_set_prot_op(scmd
, prot_op
);
807 scsi_set_prot_type(scmd
, dif
);
808 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
813 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
815 struct request_queue
*q
= sdkp
->disk
->queue
;
816 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
817 unsigned int max_blocks
= 0;
819 q
->limits
.discard_alignment
=
820 sdkp
->unmap_alignment
* logical_block_size
;
821 q
->limits
.discard_granularity
=
822 max(sdkp
->physical_block_size
,
823 sdkp
->unmap_granularity
* logical_block_size
);
824 sdkp
->provisioning_mode
= mode
;
830 blk_queue_max_discard_sectors(q
, 0);
831 blk_queue_flag_clear(QUEUE_FLAG_DISCARD
, q
);
835 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
836 (u32
)SD_MAX_WS16_BLOCKS
);
840 if (sdkp
->device
->unmap_limit_for_ws
)
841 max_blocks
= sdkp
->max_unmap_blocks
;
843 max_blocks
= sdkp
->max_ws_blocks
;
845 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
849 if (sdkp
->device
->unmap_limit_for_ws
)
850 max_blocks
= sdkp
->max_unmap_blocks
;
852 max_blocks
= sdkp
->max_ws_blocks
;
854 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
858 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
859 (u32
)SD_MAX_WS10_BLOCKS
);
863 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
864 blk_queue_flag_set(QUEUE_FLAG_DISCARD
, q
);
867 static blk_status_t
sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
869 struct scsi_device
*sdp
= cmd
->device
;
870 struct request
*rq
= cmd
->request
;
871 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
872 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
873 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
874 unsigned int data_len
= 24;
877 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
878 if (!rq
->special_vec
.bv_page
)
879 return BLK_STS_RESOURCE
;
880 clear_highpage(rq
->special_vec
.bv_page
);
881 rq
->special_vec
.bv_offset
= 0;
882 rq
->special_vec
.bv_len
= data_len
;
883 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
886 cmd
->cmnd
[0] = UNMAP
;
889 buf
= page_address(rq
->special_vec
.bv_page
);
890 put_unaligned_be16(6 + 16, &buf
[0]);
891 put_unaligned_be16(16, &buf
[2]);
892 put_unaligned_be64(lba
, &buf
[8]);
893 put_unaligned_be32(nr_blocks
, &buf
[16]);
895 cmd
->allowed
= sdkp
->max_retries
;
896 cmd
->transfersize
= data_len
;
897 rq
->timeout
= SD_TIMEOUT
;
899 return scsi_alloc_sgtables(cmd
);
902 static blk_status_t
sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
,
905 struct scsi_device
*sdp
= cmd
->device
;
906 struct request
*rq
= cmd
->request
;
907 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
908 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
909 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
910 u32 data_len
= sdp
->sector_size
;
912 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
913 if (!rq
->special_vec
.bv_page
)
914 return BLK_STS_RESOURCE
;
915 clear_highpage(rq
->special_vec
.bv_page
);
916 rq
->special_vec
.bv_offset
= 0;
917 rq
->special_vec
.bv_len
= data_len
;
918 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
921 cmd
->cmnd
[0] = WRITE_SAME_16
;
923 cmd
->cmnd
[1] = 0x8; /* UNMAP */
924 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
925 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
927 cmd
->allowed
= sdkp
->max_retries
;
928 cmd
->transfersize
= data_len
;
929 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
931 return scsi_alloc_sgtables(cmd
);
934 static blk_status_t
sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
,
937 struct scsi_device
*sdp
= cmd
->device
;
938 struct request
*rq
= cmd
->request
;
939 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
940 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
941 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
942 u32 data_len
= sdp
->sector_size
;
944 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
945 if (!rq
->special_vec
.bv_page
)
946 return BLK_STS_RESOURCE
;
947 clear_highpage(rq
->special_vec
.bv_page
);
948 rq
->special_vec
.bv_offset
= 0;
949 rq
->special_vec
.bv_len
= data_len
;
950 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
953 cmd
->cmnd
[0] = WRITE_SAME
;
955 cmd
->cmnd
[1] = 0x8; /* UNMAP */
956 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
957 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
959 cmd
->allowed
= sdkp
->max_retries
;
960 cmd
->transfersize
= data_len
;
961 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
963 return scsi_alloc_sgtables(cmd
);
966 static blk_status_t
sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
968 struct request
*rq
= cmd
->request
;
969 struct scsi_device
*sdp
= cmd
->device
;
970 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
971 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
972 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
974 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
975 switch (sdkp
->zeroing_mode
) {
976 case SD_ZERO_WS16_UNMAP
:
977 return sd_setup_write_same16_cmnd(cmd
, true);
978 case SD_ZERO_WS10_UNMAP
:
979 return sd_setup_write_same10_cmnd(cmd
, true);
983 if (sdp
->no_write_same
) {
984 rq
->rq_flags
|= RQF_QUIET
;
985 return BLK_STS_TARGET
;
988 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff)
989 return sd_setup_write_same16_cmnd(cmd
, false);
991 return sd_setup_write_same10_cmnd(cmd
, false);
994 static void sd_config_write_same(struct scsi_disk
*sdkp
)
996 struct request_queue
*q
= sdkp
->disk
->queue
;
997 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
999 if (sdkp
->device
->no_write_same
) {
1000 sdkp
->max_ws_blocks
= 0;
1004 /* Some devices can not handle block counts above 0xffff despite
1005 * supporting WRITE SAME(16). Consequently we default to 64k
1006 * blocks per I/O unless the device explicitly advertises a
1009 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
1010 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
1011 (u32
)SD_MAX_WS16_BLOCKS
);
1012 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
1013 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
1014 (u32
)SD_MAX_WS10_BLOCKS
);
1016 sdkp
->device
->no_write_same
= 1;
1017 sdkp
->max_ws_blocks
= 0;
1020 if (sdkp
->lbprz
&& sdkp
->lbpws
)
1021 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
1022 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
1023 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
1024 else if (sdkp
->max_ws_blocks
)
1025 sdkp
->zeroing_mode
= SD_ZERO_WS
;
1027 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
1029 if (sdkp
->max_ws_blocks
&&
1030 sdkp
->physical_block_size
> logical_block_size
) {
1032 * Reporting a maximum number of blocks that is not aligned
1033 * on the device physical size would cause a large write same
1034 * request to be split into physically unaligned chunks by
1035 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
1036 * even if the caller of these functions took care to align the
1037 * large request. So make sure the maximum reported is aligned
1038 * to the device physical block size. This is only an optional
1039 * optimization for regular disks, but this is mandatory to
1040 * avoid failure of large write same requests directed at
1041 * sequential write required zones of host-managed ZBC disks.
1043 sdkp
->max_ws_blocks
=
1044 round_down(sdkp
->max_ws_blocks
,
1045 bytes_to_logical(sdkp
->device
,
1046 sdkp
->physical_block_size
));
1050 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
1051 (logical_block_size
>> 9));
1052 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
1053 (logical_block_size
>> 9));
1057 * sd_setup_write_same_cmnd - write the same data to multiple blocks
1058 * @cmd: command to prepare
1060 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
1061 * the preference indicated by the target device.
1063 static blk_status_t
sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
1065 struct request
*rq
= cmd
->request
;
1066 struct scsi_device
*sdp
= cmd
->device
;
1067 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1068 struct bio
*bio
= rq
->bio
;
1069 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1070 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1073 if (sdkp
->device
->no_write_same
)
1074 return BLK_STS_TARGET
;
1076 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
1078 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
1080 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff) {
1082 cmd
->cmnd
[0] = WRITE_SAME_16
;
1083 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1084 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1087 cmd
->cmnd
[0] = WRITE_SAME
;
1088 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1089 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1092 cmd
->transfersize
= sdp
->sector_size
;
1093 cmd
->allowed
= sdkp
->max_retries
;
1096 * For WRITE SAME the data transferred via the DATA OUT buffer is
1097 * different from the amount of data actually written to the target.
1099 * We set up __data_len to the amount of data transferred via the
1100 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1101 * to transfer a single sector of data first, but then reset it to
1102 * the amount of data to be written right after so that the I/O path
1103 * knows how much to actually write.
1105 rq
->__data_len
= sdp
->sector_size
;
1106 ret
= scsi_alloc_sgtables(cmd
);
1107 rq
->__data_len
= blk_rq_bytes(rq
);
1112 static blk_status_t
sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
1114 struct request
*rq
= cmd
->request
;
1115 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1117 /* flush requests don't perform I/O, zero the S/G table */
1118 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
1120 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
1122 cmd
->transfersize
= 0;
1123 cmd
->allowed
= sdkp
->max_retries
;
1125 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1129 static blk_status_t
sd_setup_rw32_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1130 sector_t lba
, unsigned int nr_blocks
,
1131 unsigned char flags
)
1133 cmd
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1134 if (unlikely(cmd
->cmnd
== NULL
))
1135 return BLK_STS_RESOURCE
;
1137 cmd
->cmd_len
= SD_EXT_CDB_SIZE
;
1138 memset(cmd
->cmnd
, 0, cmd
->cmd_len
);
1140 cmd
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1141 cmd
->cmnd
[7] = 0x18; /* Additional CDB len */
1142 cmd
->cmnd
[9] = write
? WRITE_32
: READ_32
;
1143 cmd
->cmnd
[10] = flags
;
1144 put_unaligned_be64(lba
, &cmd
->cmnd
[12]);
1145 put_unaligned_be32(lba
, &cmd
->cmnd
[20]); /* Expected Indirect LBA */
1146 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[28]);
1151 static blk_status_t
sd_setup_rw16_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1152 sector_t lba
, unsigned int nr_blocks
,
1153 unsigned char flags
)
1156 cmd
->cmnd
[0] = write
? WRITE_16
: READ_16
;
1157 cmd
->cmnd
[1] = flags
;
1160 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1161 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1166 static blk_status_t
sd_setup_rw10_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1167 sector_t lba
, unsigned int nr_blocks
,
1168 unsigned char flags
)
1171 cmd
->cmnd
[0] = write
? WRITE_10
: READ_10
;
1172 cmd
->cmnd
[1] = flags
;
1175 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1176 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1181 static blk_status_t
sd_setup_rw6_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1182 sector_t lba
, unsigned int nr_blocks
,
1183 unsigned char flags
)
1185 /* Avoid that 0 blocks gets translated into 256 blocks. */
1186 if (WARN_ON_ONCE(nr_blocks
== 0))
1187 return BLK_STS_IOERR
;
1189 if (unlikely(flags
& 0x8)) {
1191 * This happens only if this drive failed 10byte rw
1192 * command with ILLEGAL_REQUEST during operation and
1193 * thus turned off use_10_for_rw.
1195 scmd_printk(KERN_ERR
, cmd
, "FUA write on READ/WRITE(6) drive\n");
1196 return BLK_STS_IOERR
;
1200 cmd
->cmnd
[0] = write
? WRITE_6
: READ_6
;
1201 cmd
->cmnd
[1] = (lba
>> 16) & 0x1f;
1202 cmd
->cmnd
[2] = (lba
>> 8) & 0xff;
1203 cmd
->cmnd
[3] = lba
& 0xff;
1204 cmd
->cmnd
[4] = nr_blocks
;
1210 static blk_status_t
sd_setup_read_write_cmnd(struct scsi_cmnd
*cmd
)
1212 struct request
*rq
= cmd
->request
;
1213 struct scsi_device
*sdp
= cmd
->device
;
1214 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1215 sector_t lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1217 unsigned int nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1218 unsigned int mask
= logical_to_sectors(sdp
, 1) - 1;
1219 bool write
= rq_data_dir(rq
) == WRITE
;
1220 unsigned char protect
, fua
;
1225 ret
= scsi_alloc_sgtables(cmd
);
1226 if (ret
!= BLK_STS_OK
)
1229 ret
= BLK_STS_IOERR
;
1230 if (!scsi_device_online(sdp
) || sdp
->changed
) {
1231 scmd_printk(KERN_ERR
, cmd
, "device offline or changed\n");
1235 if (blk_rq_pos(rq
) + blk_rq_sectors(rq
) > get_capacity(rq
->rq_disk
)) {
1236 scmd_printk(KERN_ERR
, cmd
, "access beyond end of device\n");
1240 if ((blk_rq_pos(rq
) & mask
) || (blk_rq_sectors(rq
) & mask
)) {
1241 scmd_printk(KERN_ERR
, cmd
, "request not aligned to the logical block size\n");
1246 * Some SD card readers can't handle accesses which touch the
1247 * last one or two logical blocks. Split accesses as needed.
1249 threshold
= sdkp
->capacity
- SD_LAST_BUGGY_SECTORS
;
1251 if (unlikely(sdp
->last_sector_bug
&& lba
+ nr_blocks
> threshold
)) {
1252 if (lba
< threshold
) {
1253 /* Access up to the threshold but not beyond */
1254 nr_blocks
= threshold
- lba
;
1256 /* Access only a single logical block */
1261 if (req_op(rq
) == REQ_OP_ZONE_APPEND
) {
1262 ret
= sd_zbc_prepare_zone_append(cmd
, &lba
, nr_blocks
);
1267 fua
= rq
->cmd_flags
& REQ_FUA
? 0x8 : 0;
1268 dix
= scsi_prot_sg_count(cmd
);
1269 dif
= scsi_host_dif_capable(cmd
->device
->host
, sdkp
->protection_type
);
1272 protect
= sd_setup_protect_cmnd(cmd
, dix
, dif
);
1276 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1277 ret
= sd_setup_rw32_cmnd(cmd
, write
, lba
, nr_blocks
,
1279 } else if (sdp
->use_16_for_rw
|| (nr_blocks
> 0xffff)) {
1280 ret
= sd_setup_rw16_cmnd(cmd
, write
, lba
, nr_blocks
,
1282 } else if ((nr_blocks
> 0xff) || (lba
> 0x1fffff) ||
1283 sdp
->use_10_for_rw
|| protect
) {
1284 ret
= sd_setup_rw10_cmnd(cmd
, write
, lba
, nr_blocks
,
1287 ret
= sd_setup_rw6_cmnd(cmd
, write
, lba
, nr_blocks
,
1291 if (unlikely(ret
!= BLK_STS_OK
))
1295 * We shouldn't disconnect in the middle of a sector, so with a dumb
1296 * host adapter, it's safe to assume that we can at least transfer
1297 * this many bytes between each connect / disconnect.
1299 cmd
->transfersize
= sdp
->sector_size
;
1300 cmd
->underflow
= nr_blocks
<< 9;
1301 cmd
->allowed
= sdkp
->max_retries
;
1302 cmd
->sdb
.length
= nr_blocks
* sdp
->sector_size
;
1305 scmd_printk(KERN_INFO
, cmd
,
1306 "%s: block=%llu, count=%d\n", __func__
,
1307 (unsigned long long)blk_rq_pos(rq
),
1308 blk_rq_sectors(rq
)));
1310 scmd_printk(KERN_INFO
, cmd
,
1311 "%s %d/%u 512 byte blocks.\n",
1312 write
? "writing" : "reading", nr_blocks
,
1313 blk_rq_sectors(rq
)));
1316 * This indicates that the command is ready from our end to be queued.
1320 scsi_free_sgtables(cmd
);
1324 static blk_status_t
sd_init_command(struct scsi_cmnd
*cmd
)
1326 struct request
*rq
= cmd
->request
;
1328 switch (req_op(rq
)) {
1329 case REQ_OP_DISCARD
:
1330 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1332 return sd_setup_unmap_cmnd(cmd
);
1334 return sd_setup_write_same16_cmnd(cmd
, true);
1336 return sd_setup_write_same10_cmnd(cmd
, true);
1338 return sd_setup_write_same10_cmnd(cmd
, false);
1340 return BLK_STS_TARGET
;
1342 case REQ_OP_WRITE_ZEROES
:
1343 return sd_setup_write_zeroes_cmnd(cmd
);
1344 case REQ_OP_WRITE_SAME
:
1345 return sd_setup_write_same_cmnd(cmd
);
1347 return sd_setup_flush_cmnd(cmd
);
1350 case REQ_OP_ZONE_APPEND
:
1351 return sd_setup_read_write_cmnd(cmd
);
1352 case REQ_OP_ZONE_RESET
:
1353 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1355 case REQ_OP_ZONE_RESET_ALL
:
1356 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1358 case REQ_OP_ZONE_OPEN
:
1359 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_OPEN_ZONE
, false);
1360 case REQ_OP_ZONE_CLOSE
:
1361 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_CLOSE_ZONE
, false);
1362 case REQ_OP_ZONE_FINISH
:
1363 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_FINISH_ZONE
, false);
1366 return BLK_STS_NOTSUPP
;
1370 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1372 struct request
*rq
= SCpnt
->request
;
1375 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1376 mempool_free(rq
->special_vec
.bv_page
, sd_page_pool
);
1378 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1382 mempool_free(cmnd
, sd_cdb_pool
);
1386 static bool sd_need_revalidate(struct block_device
*bdev
,
1387 struct scsi_disk
*sdkp
)
1389 if (sdkp
->device
->removable
|| sdkp
->write_prot
) {
1390 if (bdev_check_media_change(bdev
))
1395 * Force a full rescan after ioctl(BLKRRPART). While the disk state has
1396 * nothing to do with partitions, BLKRRPART is used to force a full
1397 * revalidate after things like a format for historical reasons.
1399 return test_bit(GD_NEED_PART_SCAN
, &bdev
->bd_disk
->state
);
1403 * sd_open - open a scsi disk device
1404 * @bdev: Block device of the scsi disk to open
1405 * @mode: FMODE_* mask
1407 * Returns 0 if successful. Returns a negated errno value in case
1410 * Note: This can be called from a user context (e.g. fsck(1) )
1411 * or from within the kernel (e.g. as a result of a mount(1) ).
1412 * In the latter case @inode and @filp carry an abridged amount
1413 * of information as noted above.
1415 * Locking: called with bdev->bd_disk->open_mutex held.
1417 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1419 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1420 struct scsi_device
*sdev
;
1426 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1428 sdev
= sdkp
->device
;
1431 * If the device is in error recovery, wait until it is done.
1432 * If the device is offline, then disallow any access to it.
1435 if (!scsi_block_when_processing_errors(sdev
))
1438 if (sd_need_revalidate(bdev
, sdkp
))
1439 sd_revalidate_disk(bdev
->bd_disk
);
1442 * If the drive is empty, just let the open fail.
1444 retval
= -ENOMEDIUM
;
1445 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1449 * If the device has the write protect tab set, have the open fail
1450 * if the user expects to be able to write to the thing.
1453 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1457 * It is possible that the disk changing stuff resulted in
1458 * the device being taken offline. If this is the case,
1459 * report this to the user, and don't pretend that the
1460 * open actually succeeded.
1463 if (!scsi_device_online(sdev
))
1466 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1467 if (scsi_block_when_processing_errors(sdev
))
1468 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1474 scsi_disk_put(sdkp
);
1479 * sd_release - invoked when the (last) close(2) is called on this
1481 * @disk: disk to release
1482 * @mode: FMODE_* mask
1486 * Note: may block (uninterruptible) if error recovery is underway
1489 * Locking: called with bdev->bd_disk->open_mutex held.
1491 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1493 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1494 struct scsi_device
*sdev
= sdkp
->device
;
1496 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1498 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1499 if (scsi_block_when_processing_errors(sdev
))
1500 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1503 scsi_disk_put(sdkp
);
1506 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1508 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1509 struct scsi_device
*sdp
= sdkp
->device
;
1510 struct Scsi_Host
*host
= sdp
->host
;
1511 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1514 /* default to most commonly used values */
1515 diskinfo
[0] = 0x40; /* 1 << 6 */
1516 diskinfo
[1] = 0x20; /* 1 << 5 */
1517 diskinfo
[2] = capacity
>> 11;
1519 /* override with calculated, extended default, or driver values */
1520 if (host
->hostt
->bios_param
)
1521 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1523 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1525 geo
->heads
= diskinfo
[0];
1526 geo
->sectors
= diskinfo
[1];
1527 geo
->cylinders
= diskinfo
[2];
1532 * sd_ioctl_common - process an ioctl
1533 * @bdev: target block device
1534 * @mode: FMODE_* mask
1535 * @cmd: ioctl command number
1536 * @p: this is third argument given to ioctl(2) system call.
1537 * Often contains a pointer.
1539 * Returns 0 if successful (some ioctls return positive numbers on
1540 * success as well). Returns a negated errno value in case of error.
1542 * Note: most ioctls are forward onto the block subsystem or further
1543 * down in the scsi subsystem.
1545 static int sd_ioctl_common(struct block_device
*bdev
, fmode_t mode
,
1546 unsigned int cmd
, void __user
*p
)
1548 struct gendisk
*disk
= bdev
->bd_disk
;
1549 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1550 struct scsi_device
*sdp
= sdkp
->device
;
1553 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1554 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1556 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1561 * If we are in the middle of error recovery, don't let anyone
1562 * else try and use this device. Also, if error recovery fails, it
1563 * may try and take the device offline, in which case all further
1564 * access to the device is prohibited.
1566 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1567 (mode
& FMODE_NDELAY
) != 0);
1571 if (is_sed_ioctl(cmd
))
1572 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1575 * Send SCSI addressing ioctls directly to mid level, send other
1576 * ioctls to block level and then onto mid level if they can't be
1580 case SCSI_IOCTL_GET_IDLUN
:
1581 case SCSI_IOCTL_GET_BUS_NUMBER
:
1582 error
= scsi_ioctl(sdp
, cmd
, p
);
1585 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1592 static void set_media_not_present(struct scsi_disk
*sdkp
)
1594 if (sdkp
->media_present
)
1595 sdkp
->device
->changed
= 1;
1597 if (sdkp
->device
->removable
) {
1598 sdkp
->media_present
= 0;
1603 static int media_not_present(struct scsi_disk
*sdkp
,
1604 struct scsi_sense_hdr
*sshdr
)
1606 if (!scsi_sense_valid(sshdr
))
1609 /* not invoked for commands that could return deferred errors */
1610 switch (sshdr
->sense_key
) {
1611 case UNIT_ATTENTION
:
1613 /* medium not present */
1614 if (sshdr
->asc
== 0x3A) {
1615 set_media_not_present(sdkp
);
1623 * sd_check_events - check media events
1624 * @disk: kernel device descriptor
1625 * @clearing: disk events currently being cleared
1627 * Returns mask of DISK_EVENT_*.
1629 * Note: this function is invoked from the block subsystem.
1631 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1633 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1634 struct scsi_device
*sdp
;
1642 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1645 * If the device is offline, don't send any commands - just pretend as
1646 * if the command failed. If the device ever comes back online, we
1647 * can deal with it then. It is only because of unrecoverable errors
1648 * that we would ever take a device offline in the first place.
1650 if (!scsi_device_online(sdp
)) {
1651 set_media_not_present(sdkp
);
1656 * Using TEST_UNIT_READY enables differentiation between drive with
1657 * no cartridge loaded - NOT READY, drive with changed cartridge -
1658 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1660 * Drives that auto spin down. eg iomega jaz 1G, will be started
1661 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1662 * sd_revalidate() is called.
1664 if (scsi_block_when_processing_errors(sdp
)) {
1665 struct scsi_sense_hdr sshdr
= { 0, };
1667 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, sdkp
->max_retries
,
1670 /* failed to execute TUR, assume media not present */
1671 if (retval
< 0 || host_byte(retval
)) {
1672 set_media_not_present(sdkp
);
1676 if (media_not_present(sdkp
, &sshdr
))
1681 * For removable scsi disk we have to recognise the presence
1682 * of a disk in the drive.
1684 if (!sdkp
->media_present
)
1686 sdkp
->media_present
= 1;
1689 * sdp->changed is set under the following conditions:
1691 * Medium present state has changed in either direction.
1692 * Device has indicated UNIT_ATTENTION.
1694 disk_changed
= sdp
->changed
;
1696 scsi_disk_put(sdkp
);
1697 return disk_changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1700 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1703 struct scsi_device
*sdp
= sdkp
->device
;
1704 const int timeout
= sdp
->request_queue
->rq_timeout
1705 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1706 struct scsi_sense_hdr my_sshdr
;
1708 if (!scsi_device_online(sdp
))
1711 /* caller might not be interested in sense, but we need it */
1715 for (retries
= 3; retries
> 0; --retries
) {
1716 unsigned char cmd
[10] = { 0 };
1718 cmd
[0] = SYNCHRONIZE_CACHE
;
1720 * Leave the rest of the command zero to indicate
1723 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1724 timeout
, sdkp
->max_retries
, 0, RQF_PM
, NULL
);
1730 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1735 if (scsi_status_is_check_condition(res
) &&
1736 scsi_sense_valid(sshdr
)) {
1737 sd_print_sense_hdr(sdkp
, sshdr
);
1739 /* we need to evaluate the error return */
1740 if (sshdr
->asc
== 0x3a || /* medium not present */
1741 sshdr
->asc
== 0x20 || /* invalid command */
1742 (sshdr
->asc
== 0x74 && sshdr
->ascq
== 0x71)) /* drive is password locked */
1743 /* this is no error here */
1747 switch (host_byte(res
)) {
1748 /* ignore errors due to racing a disconnection */
1749 case DID_BAD_TARGET
:
1750 case DID_NO_CONNECT
:
1752 /* signal the upper layer it might try again */
1756 case DID_SOFT_ERROR
:
1765 static void sd_rescan(struct device
*dev
)
1767 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1769 sd_revalidate_disk(sdkp
->disk
);
1772 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1773 unsigned int cmd
, unsigned long arg
)
1775 void __user
*p
= (void __user
*)arg
;
1778 ret
= sd_ioctl_common(bdev
, mode
, cmd
, p
);
1782 return scsi_ioctl(scsi_disk(bdev
->bd_disk
)->device
, cmd
, p
);
1785 #ifdef CONFIG_COMPAT
1786 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1787 unsigned int cmd
, unsigned long arg
)
1789 void __user
*p
= compat_ptr(arg
);
1792 ret
= sd_ioctl_common(bdev
, mode
, cmd
, p
);
1796 return scsi_compat_ioctl(scsi_disk(bdev
->bd_disk
)->device
, cmd
, p
);
1800 static char sd_pr_type(enum pr_type type
)
1803 case PR_WRITE_EXCLUSIVE
:
1805 case PR_EXCLUSIVE_ACCESS
:
1807 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1809 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1811 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1813 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1820 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1821 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1823 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1824 struct scsi_device
*sdev
= sdkp
->device
;
1825 struct scsi_sense_hdr sshdr
;
1827 u8 cmd
[16] = { 0, };
1828 u8 data
[24] = { 0, };
1830 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1833 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1835 put_unaligned_be64(key
, &data
[0]);
1836 put_unaligned_be64(sa_key
, &data
[8]);
1839 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1840 &sshdr
, SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
1842 if (scsi_status_is_check_condition(result
) &&
1843 scsi_sense_valid(&sshdr
)) {
1844 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1845 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1851 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1854 if (flags
& ~PR_FL_IGNORE_KEY
)
1856 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1857 old_key
, new_key
, 0,
1858 (1 << 0) /* APTPL */);
1861 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1866 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1869 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1871 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1874 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1875 enum pr_type type
, bool abort
)
1877 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1878 sd_pr_type(type
), 0);
1881 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1883 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1886 static const struct pr_ops sd_pr_ops
= {
1887 .pr_register
= sd_pr_register
,
1888 .pr_reserve
= sd_pr_reserve
,
1889 .pr_release
= sd_pr_release
,
1890 .pr_preempt
= sd_pr_preempt
,
1891 .pr_clear
= sd_pr_clear
,
1894 static const struct block_device_operations sd_fops
= {
1895 .owner
= THIS_MODULE
,
1897 .release
= sd_release
,
1899 .getgeo
= sd_getgeo
,
1900 #ifdef CONFIG_COMPAT
1901 .compat_ioctl
= sd_compat_ioctl
,
1903 .check_events
= sd_check_events
,
1904 .unlock_native_capacity
= sd_unlock_native_capacity
,
1905 .report_zones
= sd_zbc_report_zones
,
1906 .pr_ops
= &sd_pr_ops
,
1910 * sd_eh_reset - reset error handling callback
1911 * @scmd: sd-issued command that has failed
1913 * This function is called by the SCSI midlayer before starting
1914 * SCSI EH. When counting medium access failures we have to be
1915 * careful to register it only only once per device and SCSI EH run;
1916 * there might be several timed out commands which will cause the
1917 * 'max_medium_access_timeouts' counter to trigger after the first
1918 * SCSI EH run already and set the device to offline.
1919 * So this function resets the internal counter before starting SCSI EH.
1921 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1923 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1925 /* New SCSI EH run, reset gate variable */
1926 sdkp
->ignore_medium_access_errors
= false;
1930 * sd_eh_action - error handling callback
1931 * @scmd: sd-issued command that has failed
1932 * @eh_disp: The recovery disposition suggested by the midlayer
1934 * This function is called by the SCSI midlayer upon completion of an
1935 * error test command (currently TEST UNIT READY). The result of sending
1936 * the eh command is passed in eh_disp. We're looking for devices that
1937 * fail medium access commands but are OK with non access commands like
1938 * test unit ready (so wrongly see the device as having a successful
1941 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1943 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1944 struct scsi_device
*sdev
= scmd
->device
;
1946 if (!scsi_device_online(sdev
) ||
1947 !scsi_medium_access_command(scmd
) ||
1948 host_byte(scmd
->result
) != DID_TIME_OUT
||
1953 * The device has timed out executing a medium access command.
1954 * However, the TEST UNIT READY command sent during error
1955 * handling completed successfully. Either the device is in the
1956 * process of recovering or has it suffered an internal failure
1957 * that prevents access to the storage medium.
1959 if (!sdkp
->ignore_medium_access_errors
) {
1960 sdkp
->medium_access_timed_out
++;
1961 sdkp
->ignore_medium_access_errors
= true;
1965 * If the device keeps failing read/write commands but TEST UNIT
1966 * READY always completes successfully we assume that medium
1967 * access is no longer possible and take the device offline.
1969 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1970 scmd_printk(KERN_ERR
, scmd
,
1971 "Medium access timeout failure. Offlining disk!\n");
1972 mutex_lock(&sdev
->state_mutex
);
1973 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1974 mutex_unlock(&sdev
->state_mutex
);
1982 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1984 struct request
*req
= scmd
->request
;
1985 struct scsi_device
*sdev
= scmd
->device
;
1986 unsigned int transferred
, good_bytes
;
1987 u64 start_lba
, end_lba
, bad_lba
;
1990 * Some commands have a payload smaller than the device logical
1991 * block size (e.g. INQUIRY on a 4K disk).
1993 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1996 /* Check if we have a 'bad_lba' information */
1997 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1998 SCSI_SENSE_BUFFERSIZE
,
2003 * If the bad lba was reported incorrectly, we have no idea where
2006 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
2007 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
2008 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
2012 * resid is optional but mostly filled in. When it's unused,
2013 * its value is zero, so we assume the whole buffer transferred
2015 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
2017 /* This computation should always be done in terms of the
2018 * resolution of the device's medium.
2020 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
2022 return min(good_bytes
, transferred
);
2026 * sd_done - bottom half handler: called when the lower level
2027 * driver has completed (successfully or otherwise) a scsi command.
2028 * @SCpnt: mid-level's per command structure.
2030 * Note: potentially run from within an ISR. Must not block.
2032 static int sd_done(struct scsi_cmnd
*SCpnt
)
2034 int result
= SCpnt
->result
;
2035 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
2036 unsigned int sector_size
= SCpnt
->device
->sector_size
;
2038 struct scsi_sense_hdr sshdr
;
2039 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
2040 struct request
*req
= SCpnt
->request
;
2041 int sense_valid
= 0;
2042 int sense_deferred
= 0;
2044 switch (req_op(req
)) {
2045 case REQ_OP_DISCARD
:
2046 case REQ_OP_WRITE_ZEROES
:
2047 case REQ_OP_WRITE_SAME
:
2048 case REQ_OP_ZONE_RESET
:
2049 case REQ_OP_ZONE_RESET_ALL
:
2050 case REQ_OP_ZONE_OPEN
:
2051 case REQ_OP_ZONE_CLOSE
:
2052 case REQ_OP_ZONE_FINISH
:
2054 good_bytes
= blk_rq_bytes(req
);
2055 scsi_set_resid(SCpnt
, 0);
2058 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
2063 * In case of bogus fw or device, we could end up having
2064 * an unaligned partial completion. Check this here and force
2067 resid
= scsi_get_resid(SCpnt
);
2068 if (resid
& (sector_size
- 1)) {
2069 sd_printk(KERN_INFO
, sdkp
,
2070 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2071 resid
, sector_size
);
2072 scsi_print_command(SCpnt
);
2073 resid
= min(scsi_bufflen(SCpnt
),
2074 round_up(resid
, sector_size
));
2075 scsi_set_resid(SCpnt
, resid
);
2080 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
2082 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
2084 sdkp
->medium_access_timed_out
= 0;
2086 if (!scsi_status_is_check_condition(result
) &&
2087 (!sense_valid
|| sense_deferred
))
2090 switch (sshdr
.sense_key
) {
2091 case HARDWARE_ERROR
:
2093 good_bytes
= sd_completed_bytes(SCpnt
);
2095 case RECOVERED_ERROR
:
2096 good_bytes
= scsi_bufflen(SCpnt
);
2099 /* This indicates a false check condition, so ignore it. An
2100 * unknown amount of data was transferred so treat it as an
2104 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2106 case ABORTED_COMMAND
:
2107 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2108 good_bytes
= sd_completed_bytes(SCpnt
);
2110 case ILLEGAL_REQUEST
:
2111 switch (sshdr
.asc
) {
2112 case 0x10: /* DIX: Host detected corruption */
2113 good_bytes
= sd_completed_bytes(SCpnt
);
2115 case 0x20: /* INVALID COMMAND OPCODE */
2116 case 0x24: /* INVALID FIELD IN CDB */
2117 switch (SCpnt
->cmnd
[0]) {
2119 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2123 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2124 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2126 sdkp
->device
->no_write_same
= 1;
2127 sd_config_write_same(sdkp
);
2128 req
->rq_flags
|= RQF_QUIET
;
2139 if (sd_is_zoned(sdkp
))
2140 good_bytes
= sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2142 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2143 "sd_done: completed %d of %d bytes\n",
2144 good_bytes
, scsi_bufflen(SCpnt
)));
2150 * spinup disk - called only in sd_revalidate_disk()
2153 sd_spinup_disk(struct scsi_disk
*sdkp
)
2155 unsigned char cmd
[10];
2156 unsigned long spintime_expire
= 0;
2157 int retries
, spintime
;
2158 unsigned int the_result
;
2159 struct scsi_sense_hdr sshdr
;
2160 int sense_valid
= 0;
2164 /* Spin up drives, as required. Only do this at boot time */
2165 /* Spinup needs to be done for module loads too. */
2170 cmd
[0] = TEST_UNIT_READY
;
2171 memset((void *) &cmd
[1], 0, 9);
2173 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2176 sdkp
->max_retries
, NULL
);
2179 * If the drive has indicated to us that it
2180 * doesn't have any media in it, don't bother
2181 * with any more polling.
2183 if (media_not_present(sdkp
, &sshdr
))
2187 sense_valid
= scsi_sense_valid(&sshdr
);
2189 } while (retries
< 3 &&
2190 (!scsi_status_is_good(the_result
) ||
2191 (scsi_status_is_check_condition(the_result
) &&
2192 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2194 if (!scsi_status_is_check_condition(the_result
)) {
2195 /* no sense, TUR either succeeded or failed
2196 * with a status error */
2197 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2198 sd_print_result(sdkp
, "Test Unit Ready failed",
2205 * The device does not want the automatic start to be issued.
2207 if (sdkp
->device
->no_start_on_add
)
2210 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2211 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2212 break; /* manual intervention required */
2213 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2214 break; /* standby */
2215 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2216 break; /* unavailable */
2217 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2218 break; /* sanitize in progress */
2220 * Issue command to spin up drive when not ready
2223 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2224 cmd
[0] = START_STOP
;
2225 cmd
[1] = 1; /* Return immediately */
2226 memset((void *) &cmd
[2], 0, 8);
2227 cmd
[4] = 1; /* Start spin cycle */
2228 if (sdkp
->device
->start_stop_pwr_cond
)
2230 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2232 SD_TIMEOUT
, sdkp
->max_retries
,
2234 spintime_expire
= jiffies
+ 100 * HZ
;
2237 /* Wait 1 second for next try */
2239 printk(KERN_CONT
".");
2242 * Wait for USB flash devices with slow firmware.
2243 * Yes, this sense key/ASC combination shouldn't
2244 * occur here. It's characteristic of these devices.
2246 } else if (sense_valid
&&
2247 sshdr
.sense_key
== UNIT_ATTENTION
&&
2248 sshdr
.asc
== 0x28) {
2250 spintime_expire
= jiffies
+ 5 * HZ
;
2253 /* Wait 1 second for next try */
2256 /* we don't understand the sense code, so it's
2257 * probably pointless to loop */
2259 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2260 sd_print_sense_hdr(sdkp
, &sshdr
);
2265 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2268 if (scsi_status_is_good(the_result
))
2269 printk(KERN_CONT
"ready\n");
2271 printk(KERN_CONT
"not responding...\n");
2276 * Determine whether disk supports Data Integrity Field.
2278 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2280 struct scsi_device
*sdp
= sdkp
->device
;
2284 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0) {
2285 sdkp
->protection_type
= 0;
2289 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2291 if (type
> T10_PI_TYPE3_PROTECTION
)
2293 else if (scsi_host_dif_capable(sdp
->host
, type
))
2296 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2299 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2300 " protection type %u. Disabling disk!\n",
2304 sd_printk(KERN_NOTICE
, sdkp
,
2305 "Enabling DIF Type %u protection\n", type
);
2308 sd_printk(KERN_NOTICE
, sdkp
,
2309 "Disabling DIF Type %u protection\n", type
);
2313 sdkp
->protection_type
= type
;
2318 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2319 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2323 sd_print_sense_hdr(sdkp
, sshdr
);
2325 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2328 * Set dirty bit for removable devices if not ready -
2329 * sometimes drives will not report this properly.
2331 if (sdp
->removable
&&
2332 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2333 set_media_not_present(sdkp
);
2336 * We used to set media_present to 0 here to indicate no media
2337 * in the drive, but some drives fail read capacity even with
2338 * media present, so we can't do that.
2340 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2344 #if RC16_LEN > SD_BUF_SIZE
2345 #error RC16_LEN must not be more than SD_BUF_SIZE
2348 #define READ_CAPACITY_RETRIES_ON_RESET 10
2350 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2351 unsigned char *buffer
)
2353 unsigned char cmd
[16];
2354 struct scsi_sense_hdr sshdr
;
2355 int sense_valid
= 0;
2357 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2358 unsigned int alignment
;
2359 unsigned long long lba
;
2360 unsigned sector_size
;
2362 if (sdp
->no_read_capacity_16
)
2367 cmd
[0] = SERVICE_ACTION_IN_16
;
2368 cmd
[1] = SAI_READ_CAPACITY_16
;
2370 memset(buffer
, 0, RC16_LEN
);
2372 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2373 buffer
, RC16_LEN
, &sshdr
,
2374 SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
2376 if (media_not_present(sdkp
, &sshdr
))
2379 if (the_result
> 0) {
2380 sense_valid
= scsi_sense_valid(&sshdr
);
2382 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2383 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2385 /* Invalid Command Operation Code or
2386 * Invalid Field in CDB, just retry
2387 * silently with RC10 */
2390 sshdr
.sense_key
== UNIT_ATTENTION
&&
2391 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2392 /* Device reset might occur several times,
2393 * give it one more chance */
2394 if (--reset_retries
> 0)
2399 } while (the_result
&& retries
);
2402 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2403 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2407 sector_size
= get_unaligned_be32(&buffer
[8]);
2408 lba
= get_unaligned_be64(&buffer
[0]);
2410 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2415 /* Logical blocks per physical block exponent */
2416 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2419 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2421 /* Lowest aligned logical block */
2422 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2423 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2424 if (alignment
&& sdkp
->first_scan
)
2425 sd_printk(KERN_NOTICE
, sdkp
,
2426 "physical block alignment offset: %u\n", alignment
);
2428 if (buffer
[14] & 0x80) { /* LBPME */
2431 if (buffer
[14] & 0x40) /* LBPRZ */
2434 sd_config_discard(sdkp
, SD_LBP_WS16
);
2437 sdkp
->capacity
= lba
+ 1;
2441 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2442 unsigned char *buffer
)
2444 unsigned char cmd
[16];
2445 struct scsi_sense_hdr sshdr
;
2446 int sense_valid
= 0;
2448 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2450 unsigned sector_size
;
2453 cmd
[0] = READ_CAPACITY
;
2454 memset(&cmd
[1], 0, 9);
2455 memset(buffer
, 0, 8);
2457 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2459 SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
2461 if (media_not_present(sdkp
, &sshdr
))
2464 if (the_result
> 0) {
2465 sense_valid
= scsi_sense_valid(&sshdr
);
2467 sshdr
.sense_key
== UNIT_ATTENTION
&&
2468 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2469 /* Device reset might occur several times,
2470 * give it one more chance */
2471 if (--reset_retries
> 0)
2476 } while (the_result
&& retries
);
2479 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2480 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2484 sector_size
= get_unaligned_be32(&buffer
[4]);
2485 lba
= get_unaligned_be32(&buffer
[0]);
2487 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2488 /* Some buggy (usb cardreader) devices return an lba of
2489 0xffffffff when the want to report a size of 0 (with
2490 which they really mean no media is present) */
2492 sdkp
->physical_block_size
= sector_size
;
2496 sdkp
->capacity
= lba
+ 1;
2497 sdkp
->physical_block_size
= sector_size
;
2501 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2503 if (sdp
->host
->max_cmd_len
< 16)
2505 if (sdp
->try_rc_10_first
)
2507 if (sdp
->scsi_level
> SCSI_SPC_2
)
2509 if (scsi_device_protection(sdp
))
2515 * read disk capacity
2518 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2521 struct scsi_device
*sdp
= sdkp
->device
;
2523 if (sd_try_rc16_first(sdp
)) {
2524 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2525 if (sector_size
== -EOVERFLOW
)
2527 if (sector_size
== -ENODEV
)
2529 if (sector_size
< 0)
2530 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2531 if (sector_size
< 0)
2534 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2535 if (sector_size
== -EOVERFLOW
)
2537 if (sector_size
< 0)
2539 if ((sizeof(sdkp
->capacity
) > 4) &&
2540 (sdkp
->capacity
> 0xffffffffULL
)) {
2541 int old_sector_size
= sector_size
;
2542 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2543 "Trying to use READ CAPACITY(16).\n");
2544 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2545 if (sector_size
< 0) {
2546 sd_printk(KERN_NOTICE
, sdkp
,
2547 "Using 0xffffffff as device size\n");
2548 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2549 sector_size
= old_sector_size
;
2552 /* Remember that READ CAPACITY(16) succeeded */
2553 sdp
->try_rc_10_first
= 0;
2557 /* Some devices are known to return the total number of blocks,
2558 * not the highest block number. Some devices have versions
2559 * which do this and others which do not. Some devices we might
2560 * suspect of doing this but we don't know for certain.
2562 * If we know the reported capacity is wrong, decrement it. If
2563 * we can only guess, then assume the number of blocks is even
2564 * (usually true but not always) and err on the side of lowering
2567 if (sdp
->fix_capacity
||
2568 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2569 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2570 "from its reported value: %llu\n",
2571 (unsigned long long) sdkp
->capacity
);
2576 if (sector_size
== 0) {
2578 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2582 if (sector_size
!= 512 &&
2583 sector_size
!= 1024 &&
2584 sector_size
!= 2048 &&
2585 sector_size
!= 4096) {
2586 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2589 * The user might want to re-format the drive with
2590 * a supported sectorsize. Once this happens, it
2591 * would be relatively trivial to set the thing up.
2592 * For this reason, we leave the thing in the table.
2596 * set a bogus sector size so the normal read/write
2597 * logic in the block layer will eventually refuse any
2598 * request on this device without tripping over power
2599 * of two sector size assumptions
2603 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2604 blk_queue_physical_block_size(sdp
->request_queue
,
2605 sdkp
->physical_block_size
);
2606 sdkp
->device
->sector_size
= sector_size
;
2608 if (sdkp
->capacity
> 0xffffffff)
2609 sdp
->use_16_for_rw
= 1;
2614 * Print disk capacity
2617 sd_print_capacity(struct scsi_disk
*sdkp
,
2618 sector_t old_capacity
)
2620 int sector_size
= sdkp
->device
->sector_size
;
2621 char cap_str_2
[10], cap_str_10
[10];
2623 if (!sdkp
->first_scan
&& old_capacity
== sdkp
->capacity
)
2626 string_get_size(sdkp
->capacity
, sector_size
,
2627 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2628 string_get_size(sdkp
->capacity
, sector_size
,
2629 STRING_UNITS_10
, cap_str_10
, sizeof(cap_str_10
));
2631 sd_printk(KERN_NOTICE
, sdkp
,
2632 "%llu %d-byte logical blocks: (%s/%s)\n",
2633 (unsigned long long)sdkp
->capacity
,
2634 sector_size
, cap_str_10
, cap_str_2
);
2636 if (sdkp
->physical_block_size
!= sector_size
)
2637 sd_printk(KERN_NOTICE
, sdkp
,
2638 "%u-byte physical blocks\n",
2639 sdkp
->physical_block_size
);
2642 /* called with buffer of length 512 */
2644 sd_do_mode_sense(struct scsi_disk
*sdkp
, int dbd
, int modepage
,
2645 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2646 struct scsi_sense_hdr
*sshdr
)
2648 return scsi_mode_sense(sdkp
->device
, dbd
, modepage
, buffer
, len
,
2649 SD_TIMEOUT
, sdkp
->max_retries
, data
,
2654 * read write protect setting, if possible - called only in sd_revalidate_disk()
2655 * called with buffer of length SD_BUF_SIZE
2658 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2661 struct scsi_device
*sdp
= sdkp
->device
;
2662 struct scsi_mode_data data
;
2663 int old_wp
= sdkp
->write_prot
;
2665 set_disk_ro(sdkp
->disk
, 0);
2666 if (sdp
->skip_ms_page_3f
) {
2667 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2671 if (sdp
->use_192_bytes_for_3f
) {
2672 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2675 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2676 * We have to start carefully: some devices hang if we ask
2677 * for more than is available.
2679 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2682 * Second attempt: ask for page 0 When only page 0 is
2683 * implemented, a request for page 3F may return Sense Key
2684 * 5: Illegal Request, Sense Code 24: Invalid field in
2688 res
= sd_do_mode_sense(sdkp
, 0, 0, buffer
, 4, &data
, NULL
);
2691 * Third attempt: ask 255 bytes, as we did earlier.
2694 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 255,
2699 sd_first_printk(KERN_WARNING
, sdkp
,
2700 "Test WP failed, assume Write Enabled\n");
2702 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2703 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2704 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2705 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2706 sdkp
->write_prot
? "on" : "off");
2707 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2713 * sd_read_cache_type - called only from sd_revalidate_disk()
2714 * called with buffer of length SD_BUF_SIZE
2717 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2720 struct scsi_device
*sdp
= sdkp
->device
;
2725 struct scsi_mode_data data
;
2726 struct scsi_sense_hdr sshdr
;
2727 int old_wce
= sdkp
->WCE
;
2728 int old_rcd
= sdkp
->RCD
;
2729 int old_dpofua
= sdkp
->DPOFUA
;
2732 if (sdkp
->cache_override
)
2736 if (sdp
->skip_ms_page_8
) {
2737 if (sdp
->type
== TYPE_RBC
)
2740 if (sdp
->skip_ms_page_3f
)
2743 if (sdp
->use_192_bytes_for_3f
)
2747 } else if (sdp
->type
== TYPE_RBC
) {
2755 /* cautiously ask */
2756 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, first_len
,
2762 if (!data
.header_length
) {
2765 sd_first_printk(KERN_ERR
, sdkp
,
2766 "Missing header in MODE_SENSE response\n");
2769 /* that went OK, now ask for the proper length */
2773 * We're only interested in the first three bytes, actually.
2774 * But the data cache page is defined for the first 20.
2778 else if (len
> SD_BUF_SIZE
) {
2779 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2780 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2783 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2787 if (len
> first_len
)
2788 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, len
,
2792 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2794 while (offset
< len
) {
2795 u8 page_code
= buffer
[offset
] & 0x3F;
2796 u8 spf
= buffer
[offset
] & 0x40;
2798 if (page_code
== 8 || page_code
== 6) {
2799 /* We're interested only in the first 3 bytes.
2801 if (len
- offset
<= 2) {
2802 sd_first_printk(KERN_ERR
, sdkp
,
2803 "Incomplete mode parameter "
2807 modepage
= page_code
;
2811 /* Go to the next page */
2812 if (spf
&& len
- offset
> 3)
2813 offset
+= 4 + (buffer
[offset
+2] << 8) +
2815 else if (!spf
&& len
- offset
> 1)
2816 offset
+= 2 + buffer
[offset
+1];
2818 sd_first_printk(KERN_ERR
, sdkp
,
2820 "parameter data\n");
2826 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2830 if (modepage
== 8) {
2831 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2832 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2834 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2838 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2839 if (sdp
->broken_fua
) {
2840 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2842 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2843 !sdkp
->device
->use_16_for_rw
) {
2844 sd_first_printk(KERN_NOTICE
, sdkp
,
2845 "Uses READ/WRITE(6), disabling FUA\n");
2849 /* No cache flush allowed for write protected devices */
2850 if (sdkp
->WCE
&& sdkp
->write_prot
)
2853 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2854 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2855 sd_printk(KERN_NOTICE
, sdkp
,
2856 "Write cache: %s, read cache: %s, %s\n",
2857 sdkp
->WCE
? "enabled" : "disabled",
2858 sdkp
->RCD
? "disabled" : "enabled",
2859 sdkp
->DPOFUA
? "supports DPO and FUA"
2860 : "doesn't support DPO or FUA");
2866 if (scsi_sense_valid(&sshdr
) &&
2867 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2868 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2869 /* Invalid field in CDB */
2870 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2872 sd_first_printk(KERN_ERR
, sdkp
,
2873 "Asking for cache data failed\n");
2876 if (sdp
->wce_default_on
) {
2877 sd_first_printk(KERN_NOTICE
, sdkp
,
2878 "Assuming drive cache: write back\n");
2881 sd_first_printk(KERN_ERR
, sdkp
,
2882 "Assuming drive cache: write through\n");
2890 * The ATO bit indicates whether the DIF application tag is available
2891 * for use by the operating system.
2893 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2896 struct scsi_device
*sdp
= sdkp
->device
;
2897 struct scsi_mode_data data
;
2898 struct scsi_sense_hdr sshdr
;
2900 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2903 if (sdkp
->protection_type
== 0)
2906 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2907 sdkp
->max_retries
, &data
, &sshdr
);
2909 if (res
< 0 || !data
.header_length
||
2911 sd_first_printk(KERN_WARNING
, sdkp
,
2912 "getting Control mode page failed, assume no ATO\n");
2914 if (scsi_sense_valid(&sshdr
))
2915 sd_print_sense_hdr(sdkp
, &sshdr
);
2920 offset
= data
.header_length
+ data
.block_descriptor_length
;
2922 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2923 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2927 if ((buffer
[offset
+ 5] & 0x80) == 0)
2936 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2937 * @sdkp: disk to query
2939 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2941 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2942 const int vpd_len
= 64;
2943 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2946 /* Block Limits VPD */
2947 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2950 blk_queue_io_min(sdkp
->disk
->queue
,
2951 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2953 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2954 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2956 if (buffer
[3] == 0x3c) {
2957 unsigned int lba_count
, desc_count
;
2959 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2964 lba_count
= get_unaligned_be32(&buffer
[20]);
2965 desc_count
= get_unaligned_be32(&buffer
[24]);
2967 if (lba_count
&& desc_count
)
2968 sdkp
->max_unmap_blocks
= lba_count
;
2970 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2972 if (buffer
[32] & 0x80)
2973 sdkp
->unmap_alignment
=
2974 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2976 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2978 if (sdkp
->max_unmap_blocks
)
2979 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2981 sd_config_discard(sdkp
, SD_LBP_WS16
);
2983 } else { /* LBP VPD page tells us what to use */
2984 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2985 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2986 else if (sdkp
->lbpws
)
2987 sd_config_discard(sdkp
, SD_LBP_WS16
);
2988 else if (sdkp
->lbpws10
)
2989 sd_config_discard(sdkp
, SD_LBP_WS10
);
2991 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
3000 * sd_read_block_characteristics - Query block dev. characteristics
3001 * @sdkp: disk to query
3003 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
3005 struct request_queue
*q
= sdkp
->disk
->queue
;
3006 unsigned char *buffer
;
3008 const int vpd_len
= 64;
3010 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
3013 /* Block Device Characteristics VPD */
3014 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
3017 rot
= get_unaligned_be16(&buffer
[4]);
3020 blk_queue_flag_set(QUEUE_FLAG_NONROT
, q
);
3021 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM
, q
);
3024 if (sdkp
->device
->type
== TYPE_ZBC
) {
3026 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_HM
);
3028 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
3029 if (sdkp
->zoned
== 1) {
3031 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_HA
);
3033 /* Regular disk or drive managed disk */
3034 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_NONE
);
3038 if (!sdkp
->first_scan
)
3041 if (blk_queue_is_zoned(q
)) {
3042 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
3043 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
3045 if (sdkp
->zoned
== 1)
3046 sd_printk(KERN_NOTICE
, sdkp
,
3047 "Host-aware SMR disk used as regular disk\n");
3048 else if (sdkp
->zoned
== 2)
3049 sd_printk(KERN_NOTICE
, sdkp
,
3050 "Drive-managed SMR disk\n");
3058 * sd_read_block_provisioning - Query provisioning VPD page
3059 * @sdkp: disk to query
3061 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
3063 unsigned char *buffer
;
3064 const int vpd_len
= 8;
3066 if (sdkp
->lbpme
== 0)
3069 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
3071 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
3075 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
3076 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3077 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3083 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3085 struct scsi_device
*sdev
= sdkp
->device
;
3087 if (sdev
->host
->no_write_same
) {
3088 sdev
->no_write_same
= 1;
3093 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3094 /* too large values might cause issues with arcmsr */
3095 int vpd_buf_len
= 64;
3097 sdev
->no_report_opcodes
= 1;
3099 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3100 * CODES is unsupported and the device has an ATA
3101 * Information VPD page (SAT).
3103 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3104 sdev
->no_write_same
= 1;
3107 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3110 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3114 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3116 struct scsi_device
*sdev
= sdkp
->device
;
3118 if (!sdev
->security_supported
)
3121 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3122 SECURITY_PROTOCOL_IN
) == 1 &&
3123 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3124 SECURITY_PROTOCOL_OUT
) == 1)
3129 * Determine the device's preferred I/O size for reads and writes
3130 * unless the reported value is unreasonably small, large, not a
3131 * multiple of the physical block size, or simply garbage.
3133 static bool sd_validate_opt_xfer_size(struct scsi_disk
*sdkp
,
3134 unsigned int dev_max
)
3136 struct scsi_device
*sdp
= sdkp
->device
;
3137 unsigned int opt_xfer_bytes
=
3138 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3140 if (sdkp
->opt_xfer_blocks
== 0)
3143 if (sdkp
->opt_xfer_blocks
> dev_max
) {
3144 sd_first_printk(KERN_WARNING
, sdkp
,
3145 "Optimal transfer size %u logical blocks " \
3146 "> dev_max (%u logical blocks)\n",
3147 sdkp
->opt_xfer_blocks
, dev_max
);
3151 if (sdkp
->opt_xfer_blocks
> SD_DEF_XFER_BLOCKS
) {
3152 sd_first_printk(KERN_WARNING
, sdkp
,
3153 "Optimal transfer size %u logical blocks " \
3154 "> sd driver limit (%u logical blocks)\n",
3155 sdkp
->opt_xfer_blocks
, SD_DEF_XFER_BLOCKS
);
3159 if (opt_xfer_bytes
< PAGE_SIZE
) {
3160 sd_first_printk(KERN_WARNING
, sdkp
,
3161 "Optimal transfer size %u bytes < " \
3162 "PAGE_SIZE (%u bytes)\n",
3163 opt_xfer_bytes
, (unsigned int)PAGE_SIZE
);
3167 if (opt_xfer_bytes
& (sdkp
->physical_block_size
- 1)) {
3168 sd_first_printk(KERN_WARNING
, sdkp
,
3169 "Optimal transfer size %u bytes not a " \
3170 "multiple of physical block size (%u bytes)\n",
3171 opt_xfer_bytes
, sdkp
->physical_block_size
);
3175 sd_first_printk(KERN_INFO
, sdkp
, "Optimal transfer size %u bytes\n",
3181 * sd_revalidate_disk - called the first time a new disk is seen,
3182 * performs disk spin up, read_capacity, etc.
3183 * @disk: struct gendisk we care about
3185 static int sd_revalidate_disk(struct gendisk
*disk
)
3187 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3188 struct scsi_device
*sdp
= sdkp
->device
;
3189 struct request_queue
*q
= sdkp
->disk
->queue
;
3190 sector_t old_capacity
= sdkp
->capacity
;
3191 unsigned char *buffer
;
3192 unsigned int dev_max
, rw_max
;
3194 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3195 "sd_revalidate_disk\n"));
3198 * If the device is offline, don't try and read capacity or any
3199 * of the other niceties.
3201 if (!scsi_device_online(sdp
))
3204 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3206 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3207 "allocation failure.\n");
3211 sd_spinup_disk(sdkp
);
3214 * Without media there is no reason to ask; moreover, some devices
3215 * react badly if we do.
3217 if (sdkp
->media_present
) {
3218 sd_read_capacity(sdkp
, buffer
);
3221 * set the default to rotational. All non-rotational devices
3222 * support the block characteristics VPD page, which will
3223 * cause this to be updated correctly and any device which
3224 * doesn't support it should be treated as rotational.
3226 blk_queue_flag_clear(QUEUE_FLAG_NONROT
, q
);
3227 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM
, q
);
3229 if (scsi_device_supports_vpd(sdp
)) {
3230 sd_read_block_provisioning(sdkp
);
3231 sd_read_block_limits(sdkp
);
3232 sd_read_block_characteristics(sdkp
);
3233 sd_zbc_read_zones(sdkp
, buffer
);
3236 sd_print_capacity(sdkp
, old_capacity
);
3238 sd_read_write_protect_flag(sdkp
, buffer
);
3239 sd_read_cache_type(sdkp
, buffer
);
3240 sd_read_app_tag_own(sdkp
, buffer
);
3241 sd_read_write_same(sdkp
, buffer
);
3242 sd_read_security(sdkp
, buffer
);
3246 * We now have all cache related info, determine how we deal
3247 * with flush requests.
3249 sd_set_flush_flag(sdkp
);
3251 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3252 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3254 /* Some devices report a maximum block count for READ/WRITE requests. */
3255 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3256 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3258 if (sd_validate_opt_xfer_size(sdkp
, dev_max
)) {
3259 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3260 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3262 q
->limits
.io_opt
= 0;
3263 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3264 (sector_t
)BLK_DEF_MAX_SECTORS
);
3267 /* Do not exceed controller limit */
3268 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3271 * Only update max_sectors if previously unset or if the current value
3272 * exceeds the capabilities of the hardware.
3274 if (sdkp
->first_scan
||
3275 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3276 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3277 q
->limits
.max_sectors
= rw_max
;
3279 sdkp
->first_scan
= 0;
3281 set_capacity_and_notify(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3282 sd_config_write_same(sdkp
);
3286 * For a zoned drive, revalidating the zones can be done only once
3287 * the gendisk capacity is set. So if this fails, set back the gendisk
3290 if (sd_zbc_revalidate_zones(sdkp
))
3291 set_capacity_and_notify(disk
, 0);
3298 * sd_unlock_native_capacity - unlock native capacity
3299 * @disk: struct gendisk to set capacity for
3301 * Block layer calls this function if it detects that partitions
3302 * on @disk reach beyond the end of the device. If the SCSI host
3303 * implements ->unlock_native_capacity() method, it's invoked to
3304 * give it a chance to adjust the device capacity.
3307 * Defined by block layer. Might sleep.
3309 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3311 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3313 if (sdev
->host
->hostt
->unlock_native_capacity
)
3314 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3318 * sd_format_disk_name - format disk name
3319 * @prefix: name prefix - ie. "sd" for SCSI disks
3320 * @index: index of the disk to format name for
3321 * @buf: output buffer
3322 * @buflen: length of the output buffer
3324 * SCSI disk names starts at sda. The 26th device is sdz and the
3325 * 27th is sdaa. The last one for two lettered suffix is sdzz
3326 * which is followed by sdaaa.
3328 * This is basically 26 base counting with one extra 'nil' entry
3329 * at the beginning from the second digit on and can be
3330 * determined using similar method as 26 base conversion with the
3331 * index shifted -1 after each digit is computed.
3337 * 0 on success, -errno on failure.
3339 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3341 const int base
= 'z' - 'a' + 1;
3342 char *begin
= buf
+ strlen(prefix
);
3343 char *end
= buf
+ buflen
;
3353 *--p
= 'a' + (index
% unit
);
3354 index
= (index
/ unit
) - 1;
3355 } while (index
>= 0);
3357 memmove(begin
, p
, end
- p
);
3358 memcpy(buf
, prefix
, strlen(prefix
));
3364 * sd_probe - called during driver initialization and whenever a
3365 * new scsi device is attached to the system. It is called once
3366 * for each scsi device (not just disks) present.
3367 * @dev: pointer to device object
3369 * Returns 0 if successful (or not interested in this scsi device
3370 * (e.g. scanner)); 1 when there is an error.
3372 * Note: this function is invoked from the scsi mid-level.
3373 * This function sets up the mapping between a given
3374 * <host,channel,id,lun> (found in sdp) and new device name
3375 * (e.g. /dev/sda). More precisely it is the block device major
3376 * and minor number that is chosen here.
3378 * Assume sd_probe is not re-entrant (for time being)
3379 * Also think about sd_probe() and sd_remove() running coincidentally.
3381 static int sd_probe(struct device
*dev
)
3383 struct scsi_device
*sdp
= to_scsi_device(dev
);
3384 struct scsi_disk
*sdkp
;
3389 scsi_autopm_get_device(sdp
);
3391 if (sdp
->type
!= TYPE_DISK
&&
3392 sdp
->type
!= TYPE_ZBC
&&
3393 sdp
->type
!= TYPE_MOD
&&
3394 sdp
->type
!= TYPE_RBC
)
3397 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED
) && sdp
->type
== TYPE_ZBC
) {
3398 sdev_printk(KERN_WARNING
, sdp
,
3399 "Unsupported ZBC host-managed device.\n");
3403 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3407 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3411 gd
= alloc_disk(SD_MINORS
);
3415 index
= ida_alloc(&sd_index_ida
, GFP_KERNEL
);
3417 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3421 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3423 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3424 goto out_free_index
;
3428 sdkp
->driver
= &sd_template
;
3430 sdkp
->index
= index
;
3431 sdkp
->max_retries
= SD_MAX_RETRIES
;
3432 atomic_set(&sdkp
->openers
, 0);
3433 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3435 if (!sdp
->request_queue
->rq_timeout
) {
3436 if (sdp
->type
!= TYPE_MOD
)
3437 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3439 blk_queue_rq_timeout(sdp
->request_queue
,
3443 device_initialize(&sdkp
->dev
);
3444 sdkp
->dev
.parent
= dev
;
3445 sdkp
->dev
.class = &sd_disk_class
;
3446 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3448 error
= device_add(&sdkp
->dev
);
3450 goto out_free_index
;
3453 dev_set_drvdata(dev
, sdkp
);
3455 gd
->major
= sd_major((index
& 0xf0) >> 4);
3456 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3458 gd
->fops
= &sd_fops
;
3459 gd
->private_data
= &sdkp
->driver
;
3460 gd
->queue
= sdkp
->device
->request_queue
;
3462 /* defaults, until the device tells us otherwise */
3463 sdp
->sector_size
= 512;
3465 sdkp
->media_present
= 1;
3466 sdkp
->write_prot
= 0;
3467 sdkp
->cache_override
= 0;
3471 sdkp
->first_scan
= 1;
3472 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3474 sd_revalidate_disk(gd
);
3476 gd
->flags
= GENHD_FL_EXT_DEVT
;
3477 if (sdp
->removable
) {
3478 gd
->flags
|= GENHD_FL_REMOVABLE
;
3479 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3480 gd
->event_flags
= DISK_EVENT_FLAG_POLL
| DISK_EVENT_FLAG_UEVENT
;
3483 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3484 if (sdp
->rpm_autosuspend
) {
3485 pm_runtime_set_autosuspend_delay(dev
,
3486 sdp
->host
->hostt
->rpm_autosuspend_delay
);
3488 device_add_disk(dev
, gd
, NULL
);
3490 sd_dif_config_host(sdkp
);
3492 sd_revalidate_disk(gd
);
3494 if (sdkp
->security
) {
3495 sdkp
->opal_dev
= init_opal_dev(sdkp
, &sd_sec_submit
);
3497 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3500 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3501 sdp
->removable
? "removable " : "");
3502 scsi_autopm_put_device(sdp
);
3507 ida_free(&sd_index_ida
, index
);
3511 sd_zbc_release_disk(sdkp
);
3514 scsi_autopm_put_device(sdp
);
3519 * sd_remove - called whenever a scsi disk (previously recognized by
3520 * sd_probe) is detached from the system. It is called (potentially
3521 * multiple times) during sd module unload.
3522 * @dev: pointer to device object
3524 * Note: this function is invoked from the scsi mid-level.
3525 * This function potentially frees up a device name (e.g. /dev/sdc)
3526 * that could be re-used by a subsequent sd_probe().
3527 * This function is not called when the built-in sd driver is "exit-ed".
3529 static int sd_remove(struct device
*dev
)
3531 struct scsi_disk
*sdkp
;
3533 sdkp
= dev_get_drvdata(dev
);
3534 scsi_autopm_get_device(sdkp
->device
);
3536 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3537 device_del(&sdkp
->dev
);
3538 del_gendisk(sdkp
->disk
);
3541 free_opal_dev(sdkp
->opal_dev
);
3543 mutex_lock(&sd_ref_mutex
);
3544 dev_set_drvdata(dev
, NULL
);
3545 put_device(&sdkp
->dev
);
3546 mutex_unlock(&sd_ref_mutex
);
3552 * scsi_disk_release - Called to free the scsi_disk structure
3553 * @dev: pointer to embedded class device
3555 * sd_ref_mutex must be held entering this routine. Because it is
3556 * called on last put, you should always use the scsi_disk_get()
3557 * scsi_disk_put() helpers which manipulate the semaphore directly
3558 * and never do a direct put_device.
3560 static void scsi_disk_release(struct device
*dev
)
3562 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3563 struct gendisk
*disk
= sdkp
->disk
;
3564 struct request_queue
*q
= disk
->queue
;
3566 ida_free(&sd_index_ida
, sdkp
->index
);
3569 * Wait until all requests that are in progress have completed.
3570 * This is necessary to avoid that e.g. scsi_end_request() crashes
3571 * due to clearing the disk->private_data pointer. Wait from inside
3572 * scsi_disk_release() instead of from sd_release() to avoid that
3573 * freezing and unfreezing the request queue affects user space I/O
3574 * in case multiple processes open a /dev/sd... node concurrently.
3576 blk_mq_freeze_queue(q
);
3577 blk_mq_unfreeze_queue(q
);
3579 disk
->private_data
= NULL
;
3581 put_device(&sdkp
->device
->sdev_gendev
);
3583 sd_zbc_release_disk(sdkp
);
3588 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3590 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3591 struct scsi_sense_hdr sshdr
;
3592 struct scsi_device
*sdp
= sdkp
->device
;
3596 cmd
[4] |= 1; /* START */
3598 if (sdp
->start_stop_pwr_cond
)
3599 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3601 if (!scsi_device_online(sdp
))
3604 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3605 SD_TIMEOUT
, sdkp
->max_retries
, 0, RQF_PM
, NULL
);
3607 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3608 if (res
> 0 && scsi_sense_valid(&sshdr
)) {
3609 sd_print_sense_hdr(sdkp
, &sshdr
);
3610 /* 0x3a is medium not present */
3611 if (sshdr
.asc
== 0x3a)
3616 /* SCSI error codes must not go to the generic layer */
3624 * Send a SYNCHRONIZE CACHE instruction down to the device through
3625 * the normal SCSI command structure. Wait for the command to
3628 static void sd_shutdown(struct device
*dev
)
3630 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3633 return; /* this can happen */
3635 if (pm_runtime_suspended(dev
))
3638 if (sdkp
->WCE
&& sdkp
->media_present
) {
3639 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3640 sd_sync_cache(sdkp
, NULL
);
3643 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3644 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3645 sd_start_stop_device(sdkp
, 0);
3649 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3651 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3652 struct scsi_sense_hdr sshdr
;
3655 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3658 if (sdkp
->WCE
&& sdkp
->media_present
) {
3659 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3660 ret
= sd_sync_cache(sdkp
, &sshdr
);
3663 /* ignore OFFLINE device */
3667 if (!scsi_sense_valid(&sshdr
) ||
3668 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3672 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3673 * doesn't support sync. There's not much to do and
3674 * suspend shouldn't fail.
3680 if (sdkp
->device
->manage_start_stop
) {
3681 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3682 /* an error is not worth aborting a system sleep */
3683 ret
= sd_start_stop_device(sdkp
, 0);
3684 if (ignore_stop_errors
)
3691 static int sd_suspend_system(struct device
*dev
)
3693 return sd_suspend_common(dev
, true);
3696 static int sd_suspend_runtime(struct device
*dev
)
3698 return sd_suspend_common(dev
, false);
3701 static int sd_resume(struct device
*dev
)
3703 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3706 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3709 if (!sdkp
->device
->manage_start_stop
)
3712 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3713 ret
= sd_start_stop_device(sdkp
, 1);
3715 opal_unlock_from_suspend(sdkp
->opal_dev
);
3720 * init_sd - entry point for this driver (both when built in or when
3723 * Note: this function registers this driver with the scsi mid-level.
3725 static int __init
init_sd(void)
3727 int majors
= 0, i
, err
;
3729 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3731 for (i
= 0; i
< SD_MAJORS
; i
++) {
3732 if (__register_blkdev(sd_major(i
), "sd", sd_default_probe
))
3740 err
= class_register(&sd_disk_class
);
3744 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3746 if (!sd_cdb_cache
) {
3747 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3752 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3754 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3759 sd_page_pool
= mempool_create_page_pool(SD_MEMPOOL_SIZE
, 0);
3760 if (!sd_page_pool
) {
3761 printk(KERN_ERR
"sd: can't init discard page pool\n");
3766 err
= scsi_register_driver(&sd_template
.gendrv
);
3768 goto err_out_driver
;
3773 mempool_destroy(sd_page_pool
);
3776 mempool_destroy(sd_cdb_pool
);
3779 kmem_cache_destroy(sd_cdb_cache
);
3782 class_unregister(&sd_disk_class
);
3784 for (i
= 0; i
< SD_MAJORS
; i
++)
3785 unregister_blkdev(sd_major(i
), "sd");
3790 * exit_sd - exit point for this driver (when it is a module).
3792 * Note: this function unregisters this driver from the scsi mid-level.
3794 static void __exit
exit_sd(void)
3798 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3800 scsi_unregister_driver(&sd_template
.gendrv
);
3801 mempool_destroy(sd_cdb_pool
);
3802 mempool_destroy(sd_page_pool
);
3803 kmem_cache_destroy(sd_cdb_cache
);
3805 class_unregister(&sd_disk_class
);
3807 for (i
= 0; i
< SD_MAJORS
; i
++)
3808 unregister_blkdev(sd_major(i
), "sd");
3811 module_init(init_sd
);
3812 module_exit(exit_sd
);
3814 void sd_print_sense_hdr(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
3816 scsi_print_sense_hdr(sdkp
->device
,
3817 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3820 void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
, int result
)
3822 const char *hb_string
= scsi_hostbyte_string(result
);
3825 sd_printk(KERN_INFO
, sdkp
,
3826 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3827 hb_string
? hb_string
: "invalid",
3830 sd_printk(KERN_INFO
, sdkp
,
3831 "%s: Result: hostbyte=0x%02x driverbyte=%s\n",
3832 msg
, host_byte(result
), "DRIVER_OK");