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/hdreg.h>
42 #include <linux/errno.h>
43 #include <linux/idr.h>
44 #include <linux/interrupt.h>
45 #include <linux/init.h>
46 #include <linux/blkdev.h>
47 #include <linux/blkpg.h>
48 #include <linux/blk-pm.h>
49 #include <linux/delay.h>
50 #include <linux/major.h>
51 #include <linux/mutex.h>
52 #include <linux/string_helpers.h>
53 #include <linux/slab.h>
54 #include <linux/sed-opal.h>
55 #include <linux/pm_runtime.h>
57 #include <linux/t10-pi.h>
58 #include <linux/uaccess.h>
59 #include <asm/unaligned.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_dbg.h>
64 #include <scsi/scsi_device.h>
65 #include <scsi/scsi_driver.h>
66 #include <scsi/scsi_eh.h>
67 #include <scsi/scsi_host.h>
68 #include <scsi/scsi_ioctl.h>
69 #include <scsi/scsicam.h>
70 #include <scsi/scsi_common.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 void sd_shutdown(struct device
*);
108 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
109 static void scsi_disk_release(struct device
*cdev
);
111 static DEFINE_IDA(sd_index_ida
);
113 static mempool_t
*sd_page_pool
;
114 static struct lock_class_key sd_bio_compl_lkclass
;
116 static const char *sd_cache_types
[] = {
117 "write through", "none", "write back",
118 "write back, no read (daft)"
121 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
123 bool wc
= false, fua
= false;
131 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
135 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
136 const char *buf
, size_t count
)
138 int ct
, rcd
, wce
, sp
;
139 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
140 struct scsi_device
*sdp
= sdkp
->device
;
143 struct scsi_mode_data data
;
144 struct scsi_sense_hdr sshdr
;
145 static const char temp
[] = "temporary ";
148 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
149 /* no cache control on RBC devices; theoretically they
150 * can do it, but there's probably so many exceptions
151 * it's not worth the risk */
154 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
155 buf
+= sizeof(temp
) - 1;
156 sdkp
->cache_override
= 1;
158 sdkp
->cache_override
= 0;
161 ct
= sysfs_match_string(sd_cache_types
, buf
);
165 rcd
= ct
& 0x01 ? 1 : 0;
166 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
168 if (sdkp
->cache_override
) {
171 sd_set_flush_flag(sdkp
);
175 if (scsi_mode_sense(sdp
, 0x08, 8, 0, buffer
, sizeof(buffer
), SD_TIMEOUT
,
176 sdkp
->max_retries
, &data
, NULL
))
178 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
179 data
.block_descriptor_length
);
180 buffer_data
= buffer
+ data
.header_length
+
181 data
.block_descriptor_length
;
182 buffer_data
[2] &= ~0x05;
183 buffer_data
[2] |= wce
<< 2 | rcd
;
184 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
185 buffer_data
[0] &= ~0x80;
188 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
189 * received mode parameter buffer before doing MODE SELECT.
191 data
.device_specific
= 0;
193 if (scsi_mode_select(sdp
, 1, sp
, buffer_data
, len
, SD_TIMEOUT
,
194 sdkp
->max_retries
, &data
, &sshdr
)) {
195 if (scsi_sense_valid(&sshdr
))
196 sd_print_sense_hdr(sdkp
, &sshdr
);
199 sd_revalidate_disk(sdkp
->disk
);
204 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
207 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
208 struct scsi_device
*sdp
= sdkp
->device
;
210 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
214 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
215 const char *buf
, size_t count
)
217 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
218 struct scsi_device
*sdp
= sdkp
->device
;
221 if (!capable(CAP_SYS_ADMIN
))
224 if (kstrtobool(buf
, &v
))
227 sdp
->manage_start_stop
= v
;
231 static DEVICE_ATTR_RW(manage_start_stop
);
234 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
236 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
238 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
242 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
243 const char *buf
, size_t count
)
246 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
247 struct scsi_device
*sdp
= sdkp
->device
;
249 if (!capable(CAP_SYS_ADMIN
))
252 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
255 if (kstrtobool(buf
, &v
))
258 sdp
->allow_restart
= v
;
262 static DEVICE_ATTR_RW(allow_restart
);
265 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
267 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
268 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
270 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
272 static DEVICE_ATTR_RW(cache_type
);
275 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
277 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
279 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
281 static DEVICE_ATTR_RO(FUA
);
284 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
287 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
289 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
293 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
294 const char *buf
, size_t count
)
296 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
300 if (!capable(CAP_SYS_ADMIN
))
303 err
= kstrtouint(buf
, 10, &val
);
308 if (val
<= T10_PI_TYPE3_PROTECTION
)
309 sdkp
->protection_type
= val
;
313 static DEVICE_ATTR_RW(protection_type
);
316 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
319 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
320 struct scsi_device
*sdp
= sdkp
->device
;
321 unsigned int dif
, dix
;
323 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
324 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
326 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
332 return sprintf(buf
, "none\n");
334 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
336 static DEVICE_ATTR_RO(protection_mode
);
339 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
341 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
343 return sprintf(buf
, "%u\n", sdkp
->ATO
);
345 static DEVICE_ATTR_RO(app_tag_own
);
348 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
351 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
353 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
355 static DEVICE_ATTR_RO(thin_provisioning
);
357 /* sysfs_match_string() requires dense arrays */
358 static const char *lbp_mode
[] = {
359 [SD_LBP_FULL
] = "full",
360 [SD_LBP_UNMAP
] = "unmap",
361 [SD_LBP_WS16
] = "writesame_16",
362 [SD_LBP_WS10
] = "writesame_10",
363 [SD_LBP_ZERO
] = "writesame_zero",
364 [SD_LBP_DISABLE
] = "disabled",
368 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
371 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
373 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
377 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
378 const char *buf
, size_t count
)
380 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
381 struct scsi_device
*sdp
= sdkp
->device
;
384 if (!capable(CAP_SYS_ADMIN
))
387 if (sd_is_zoned(sdkp
)) {
388 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
392 if (sdp
->type
!= TYPE_DISK
)
395 mode
= sysfs_match_string(lbp_mode
, buf
);
399 sd_config_discard(sdkp
, mode
);
403 static DEVICE_ATTR_RW(provisioning_mode
);
405 /* sysfs_match_string() requires dense arrays */
406 static const char *zeroing_mode
[] = {
407 [SD_ZERO_WRITE
] = "write",
408 [SD_ZERO_WS
] = "writesame",
409 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
410 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
414 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
417 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
419 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
423 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
424 const char *buf
, size_t count
)
426 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
429 if (!capable(CAP_SYS_ADMIN
))
432 mode
= sysfs_match_string(zeroing_mode
, buf
);
436 sdkp
->zeroing_mode
= mode
;
440 static DEVICE_ATTR_RW(zeroing_mode
);
443 max_medium_access_timeouts_show(struct device
*dev
,
444 struct device_attribute
*attr
, char *buf
)
446 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
448 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
452 max_medium_access_timeouts_store(struct device
*dev
,
453 struct device_attribute
*attr
, const char *buf
,
456 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
459 if (!capable(CAP_SYS_ADMIN
))
462 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
464 return err
? err
: count
;
466 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
469 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
472 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
474 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
478 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
479 const char *buf
, size_t count
)
481 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
482 struct scsi_device
*sdp
= sdkp
->device
;
486 if (!capable(CAP_SYS_ADMIN
))
489 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
492 err
= kstrtoul(buf
, 10, &max
);
498 sdp
->no_write_same
= 1;
499 else if (max
<= SD_MAX_WS16_BLOCKS
) {
500 sdp
->no_write_same
= 0;
501 sdkp
->max_ws_blocks
= max
;
504 sd_config_write_same(sdkp
);
508 static DEVICE_ATTR_RW(max_write_same_blocks
);
511 zoned_cap_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
513 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
515 if (sdkp
->device
->type
== TYPE_ZBC
)
516 return sprintf(buf
, "host-managed\n");
517 if (sdkp
->zoned
== 1)
518 return sprintf(buf
, "host-aware\n");
519 if (sdkp
->zoned
== 2)
520 return sprintf(buf
, "drive-managed\n");
521 return sprintf(buf
, "none\n");
523 static DEVICE_ATTR_RO(zoned_cap
);
526 max_retries_store(struct device
*dev
, struct device_attribute
*attr
,
527 const char *buf
, size_t count
)
529 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
530 struct scsi_device
*sdev
= sdkp
->device
;
533 err
= kstrtoint(buf
, 10, &retries
);
537 if (retries
== SCSI_CMD_RETRIES_NO_LIMIT
|| retries
<= SD_MAX_RETRIES
) {
538 sdkp
->max_retries
= retries
;
542 sdev_printk(KERN_ERR
, sdev
, "max_retries must be between -1 and %d\n",
548 max_retries_show(struct device
*dev
, struct device_attribute
*attr
,
551 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
553 return sprintf(buf
, "%d\n", sdkp
->max_retries
);
556 static DEVICE_ATTR_RW(max_retries
);
558 static struct attribute
*sd_disk_attrs
[] = {
559 &dev_attr_cache_type
.attr
,
561 &dev_attr_allow_restart
.attr
,
562 &dev_attr_manage_start_stop
.attr
,
563 &dev_attr_protection_type
.attr
,
564 &dev_attr_protection_mode
.attr
,
565 &dev_attr_app_tag_own
.attr
,
566 &dev_attr_thin_provisioning
.attr
,
567 &dev_attr_provisioning_mode
.attr
,
568 &dev_attr_zeroing_mode
.attr
,
569 &dev_attr_max_write_same_blocks
.attr
,
570 &dev_attr_max_medium_access_timeouts
.attr
,
571 &dev_attr_zoned_cap
.attr
,
572 &dev_attr_max_retries
.attr
,
575 ATTRIBUTE_GROUPS(sd_disk
);
577 static struct class sd_disk_class
= {
579 .dev_release
= scsi_disk_release
,
580 .dev_groups
= sd_disk_groups
,
584 * Don't request a new module, as that could deadlock in multipath
587 static void sd_default_probe(dev_t devt
)
592 * Device no to disk mapping:
594 * major disc2 disc p1
595 * |............|.............|....|....| <- dev_t
598 * Inside a major, we have 16k disks, however mapped non-
599 * contiguously. The first 16 disks are for major0, the next
600 * ones with major1, ... Disk 256 is for major0 again, disk 272
602 * As we stay compatible with our numbering scheme, we can reuse
603 * the well-know SCSI majors 8, 65--71, 136--143.
605 static int sd_major(int major_idx
)
609 return SCSI_DISK0_MAJOR
;
611 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
613 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
616 return 0; /* shut up gcc */
620 #ifdef CONFIG_BLK_SED_OPAL
621 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
622 size_t len
, bool send
)
624 struct scsi_disk
*sdkp
= data
;
625 struct scsi_device
*sdev
= sdkp
->device
;
627 const struct scsi_exec_args exec_args
= {
628 .req_flags
= BLK_MQ_REQ_PM
,
632 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
634 put_unaligned_be16(spsp
, &cdb
[2]);
635 put_unaligned_be32(len
, &cdb
[6]);
637 ret
= scsi_execute_cmd(sdev
, cdb
, send
? REQ_OP_DRV_OUT
: REQ_OP_DRV_IN
,
638 buffer
, len
, SD_TIMEOUT
, sdkp
->max_retries
,
640 return ret
<= 0 ? ret
: -EIO
;
642 #endif /* CONFIG_BLK_SED_OPAL */
645 * Look up the DIX operation based on whether the command is read or
646 * write and whether dix and dif are enabled.
648 static unsigned int sd_prot_op(bool write
, bool dix
, bool dif
)
650 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
651 static const unsigned int ops
[] = { /* wrt dix dif */
652 SCSI_PROT_NORMAL
, /* 0 0 0 */
653 SCSI_PROT_READ_STRIP
, /* 0 0 1 */
654 SCSI_PROT_READ_INSERT
, /* 0 1 0 */
655 SCSI_PROT_READ_PASS
, /* 0 1 1 */
656 SCSI_PROT_NORMAL
, /* 1 0 0 */
657 SCSI_PROT_WRITE_INSERT
, /* 1 0 1 */
658 SCSI_PROT_WRITE_STRIP
, /* 1 1 0 */
659 SCSI_PROT_WRITE_PASS
, /* 1 1 1 */
662 return ops
[write
<< 2 | dix
<< 1 | dif
];
666 * Returns a mask of the protection flags that are valid for a given DIX
669 static unsigned int sd_prot_flag_mask(unsigned int prot_op
)
671 static const unsigned int flag_mask
[] = {
672 [SCSI_PROT_NORMAL
] = 0,
674 [SCSI_PROT_READ_STRIP
] = SCSI_PROT_TRANSFER_PI
|
675 SCSI_PROT_GUARD_CHECK
|
676 SCSI_PROT_REF_CHECK
|
677 SCSI_PROT_REF_INCREMENT
,
679 [SCSI_PROT_READ_INSERT
] = SCSI_PROT_REF_INCREMENT
|
680 SCSI_PROT_IP_CHECKSUM
,
682 [SCSI_PROT_READ_PASS
] = SCSI_PROT_TRANSFER_PI
|
683 SCSI_PROT_GUARD_CHECK
|
684 SCSI_PROT_REF_CHECK
|
685 SCSI_PROT_REF_INCREMENT
|
686 SCSI_PROT_IP_CHECKSUM
,
688 [SCSI_PROT_WRITE_INSERT
] = SCSI_PROT_TRANSFER_PI
|
689 SCSI_PROT_REF_INCREMENT
,
691 [SCSI_PROT_WRITE_STRIP
] = SCSI_PROT_GUARD_CHECK
|
692 SCSI_PROT_REF_CHECK
|
693 SCSI_PROT_REF_INCREMENT
|
694 SCSI_PROT_IP_CHECKSUM
,
696 [SCSI_PROT_WRITE_PASS
] = SCSI_PROT_TRANSFER_PI
|
697 SCSI_PROT_GUARD_CHECK
|
698 SCSI_PROT_REF_CHECK
|
699 SCSI_PROT_REF_INCREMENT
|
700 SCSI_PROT_IP_CHECKSUM
,
703 return flag_mask
[prot_op
];
706 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
707 unsigned int dix
, unsigned int dif
)
709 struct request
*rq
= scsi_cmd_to_rq(scmd
);
710 struct bio
*bio
= rq
->bio
;
711 unsigned int prot_op
= sd_prot_op(rq_data_dir(rq
), dix
, dif
);
712 unsigned int protect
= 0;
714 if (dix
) { /* DIX Type 0, 1, 2, 3 */
715 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
716 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
718 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
719 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
722 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
723 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
725 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
726 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
729 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
730 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
732 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
733 protect
= 3 << 5; /* Disable target PI checking */
735 protect
= 1 << 5; /* Enable target PI checking */
738 scsi_set_prot_op(scmd
, prot_op
);
739 scsi_set_prot_type(scmd
, dif
);
740 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
745 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
747 struct request_queue
*q
= sdkp
->disk
->queue
;
748 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
749 unsigned int max_blocks
= 0;
751 q
->limits
.discard_alignment
=
752 sdkp
->unmap_alignment
* logical_block_size
;
753 q
->limits
.discard_granularity
=
754 max(sdkp
->physical_block_size
,
755 sdkp
->unmap_granularity
* logical_block_size
);
756 sdkp
->provisioning_mode
= mode
;
762 blk_queue_max_discard_sectors(q
, 0);
766 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
767 (u32
)SD_MAX_WS16_BLOCKS
);
771 if (sdkp
->device
->unmap_limit_for_ws
)
772 max_blocks
= sdkp
->max_unmap_blocks
;
774 max_blocks
= sdkp
->max_ws_blocks
;
776 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
780 if (sdkp
->device
->unmap_limit_for_ws
)
781 max_blocks
= sdkp
->max_unmap_blocks
;
783 max_blocks
= sdkp
->max_ws_blocks
;
785 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
789 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
790 (u32
)SD_MAX_WS10_BLOCKS
);
794 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
797 static void *sd_set_special_bvec(struct request
*rq
, unsigned int data_len
)
801 page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
804 clear_highpage(page
);
805 bvec_set_page(&rq
->special_vec
, page
, data_len
, 0);
806 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
807 return bvec_virt(&rq
->special_vec
);
810 static blk_status_t
sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
812 struct scsi_device
*sdp
= cmd
->device
;
813 struct request
*rq
= scsi_cmd_to_rq(cmd
);
814 struct scsi_disk
*sdkp
= scsi_disk(rq
->q
->disk
);
815 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
816 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
817 unsigned int data_len
= 24;
820 buf
= sd_set_special_bvec(rq
, data_len
);
822 return BLK_STS_RESOURCE
;
825 cmd
->cmnd
[0] = UNMAP
;
828 put_unaligned_be16(6 + 16, &buf
[0]);
829 put_unaligned_be16(16, &buf
[2]);
830 put_unaligned_be64(lba
, &buf
[8]);
831 put_unaligned_be32(nr_blocks
, &buf
[16]);
833 cmd
->allowed
= sdkp
->max_retries
;
834 cmd
->transfersize
= data_len
;
835 rq
->timeout
= SD_TIMEOUT
;
837 return scsi_alloc_sgtables(cmd
);
840 static blk_status_t
sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
,
843 struct scsi_device
*sdp
= cmd
->device
;
844 struct request
*rq
= scsi_cmd_to_rq(cmd
);
845 struct scsi_disk
*sdkp
= scsi_disk(rq
->q
->disk
);
846 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
847 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
848 u32 data_len
= sdp
->sector_size
;
850 if (!sd_set_special_bvec(rq
, data_len
))
851 return BLK_STS_RESOURCE
;
854 cmd
->cmnd
[0] = WRITE_SAME_16
;
856 cmd
->cmnd
[1] = 0x8; /* UNMAP */
857 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
858 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
860 cmd
->allowed
= sdkp
->max_retries
;
861 cmd
->transfersize
= data_len
;
862 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
864 return scsi_alloc_sgtables(cmd
);
867 static blk_status_t
sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
,
870 struct scsi_device
*sdp
= cmd
->device
;
871 struct request
*rq
= scsi_cmd_to_rq(cmd
);
872 struct scsi_disk
*sdkp
= scsi_disk(rq
->q
->disk
);
873 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
874 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
875 u32 data_len
= sdp
->sector_size
;
877 if (!sd_set_special_bvec(rq
, data_len
))
878 return BLK_STS_RESOURCE
;
881 cmd
->cmnd
[0] = WRITE_SAME
;
883 cmd
->cmnd
[1] = 0x8; /* UNMAP */
884 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
885 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
887 cmd
->allowed
= sdkp
->max_retries
;
888 cmd
->transfersize
= data_len
;
889 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
891 return scsi_alloc_sgtables(cmd
);
894 static blk_status_t
sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
896 struct request
*rq
= scsi_cmd_to_rq(cmd
);
897 struct scsi_device
*sdp
= cmd
->device
;
898 struct scsi_disk
*sdkp
= scsi_disk(rq
->q
->disk
);
899 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
900 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
902 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
903 switch (sdkp
->zeroing_mode
) {
904 case SD_ZERO_WS16_UNMAP
:
905 return sd_setup_write_same16_cmnd(cmd
, true);
906 case SD_ZERO_WS10_UNMAP
:
907 return sd_setup_write_same10_cmnd(cmd
, true);
911 if (sdp
->no_write_same
) {
912 rq
->rq_flags
|= RQF_QUIET
;
913 return BLK_STS_TARGET
;
916 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff)
917 return sd_setup_write_same16_cmnd(cmd
, false);
919 return sd_setup_write_same10_cmnd(cmd
, false);
922 static void sd_config_write_same(struct scsi_disk
*sdkp
)
924 struct request_queue
*q
= sdkp
->disk
->queue
;
925 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
927 if (sdkp
->device
->no_write_same
) {
928 sdkp
->max_ws_blocks
= 0;
932 /* Some devices can not handle block counts above 0xffff despite
933 * supporting WRITE SAME(16). Consequently we default to 64k
934 * blocks per I/O unless the device explicitly advertises a
937 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
938 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
939 (u32
)SD_MAX_WS16_BLOCKS
);
940 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
941 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
942 (u32
)SD_MAX_WS10_BLOCKS
);
944 sdkp
->device
->no_write_same
= 1;
945 sdkp
->max_ws_blocks
= 0;
948 if (sdkp
->lbprz
&& sdkp
->lbpws
)
949 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
950 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
951 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
952 else if (sdkp
->max_ws_blocks
)
953 sdkp
->zeroing_mode
= SD_ZERO_WS
;
955 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
957 if (sdkp
->max_ws_blocks
&&
958 sdkp
->physical_block_size
> logical_block_size
) {
960 * Reporting a maximum number of blocks that is not aligned
961 * on the device physical size would cause a large write same
962 * request to be split into physically unaligned chunks by
963 * __blkdev_issue_write_zeroes() even if the caller of this
964 * functions took care to align the large request. So make sure
965 * the maximum reported is aligned to the device physical block
966 * size. This is only an optional optimization for regular
967 * disks, but this is mandatory to avoid failure of large write
968 * same requests directed at sequential write required zones of
969 * host-managed ZBC disks.
971 sdkp
->max_ws_blocks
=
972 round_down(sdkp
->max_ws_blocks
,
973 bytes_to_logical(sdkp
->device
,
974 sdkp
->physical_block_size
));
978 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
979 (logical_block_size
>> 9));
982 static blk_status_t
sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
984 struct request
*rq
= scsi_cmd_to_rq(cmd
);
985 struct scsi_disk
*sdkp
= scsi_disk(rq
->q
->disk
);
987 /* flush requests don't perform I/O, zero the S/G table */
988 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
990 if (cmd
->device
->use_16_for_sync
) {
991 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE_16
;
994 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
997 cmd
->transfersize
= 0;
998 cmd
->allowed
= sdkp
->max_retries
;
1000 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1004 static blk_status_t
sd_setup_rw32_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1005 sector_t lba
, unsigned int nr_blocks
,
1006 unsigned char flags
, unsigned int dld
)
1008 cmd
->cmd_len
= SD_EXT_CDB_SIZE
;
1009 cmd
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1010 cmd
->cmnd
[7] = 0x18; /* Additional CDB len */
1011 cmd
->cmnd
[9] = write
? WRITE_32
: READ_32
;
1012 cmd
->cmnd
[10] = flags
;
1013 cmd
->cmnd
[11] = dld
& 0x07;
1014 put_unaligned_be64(lba
, &cmd
->cmnd
[12]);
1015 put_unaligned_be32(lba
, &cmd
->cmnd
[20]); /* Expected Indirect LBA */
1016 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[28]);
1021 static blk_status_t
sd_setup_rw16_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1022 sector_t lba
, unsigned int nr_blocks
,
1023 unsigned char flags
, unsigned int dld
)
1026 cmd
->cmnd
[0] = write
? WRITE_16
: READ_16
;
1027 cmd
->cmnd
[1] = flags
| ((dld
>> 2) & 0x01);
1028 cmd
->cmnd
[14] = (dld
& 0x03) << 6;
1030 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1031 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1036 static blk_status_t
sd_setup_rw10_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1037 sector_t lba
, unsigned int nr_blocks
,
1038 unsigned char flags
)
1041 cmd
->cmnd
[0] = write
? WRITE_10
: READ_10
;
1042 cmd
->cmnd
[1] = flags
;
1045 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1046 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1051 static blk_status_t
sd_setup_rw6_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1052 sector_t lba
, unsigned int nr_blocks
,
1053 unsigned char flags
)
1055 /* Avoid that 0 blocks gets translated into 256 blocks. */
1056 if (WARN_ON_ONCE(nr_blocks
== 0))
1057 return BLK_STS_IOERR
;
1059 if (unlikely(flags
& 0x8)) {
1061 * This happens only if this drive failed 10byte rw
1062 * command with ILLEGAL_REQUEST during operation and
1063 * thus turned off use_10_for_rw.
1065 scmd_printk(KERN_ERR
, cmd
, "FUA write on READ/WRITE(6) drive\n");
1066 return BLK_STS_IOERR
;
1070 cmd
->cmnd
[0] = write
? WRITE_6
: READ_6
;
1071 cmd
->cmnd
[1] = (lba
>> 16) & 0x1f;
1072 cmd
->cmnd
[2] = (lba
>> 8) & 0xff;
1073 cmd
->cmnd
[3] = lba
& 0xff;
1074 cmd
->cmnd
[4] = nr_blocks
;
1081 * Check if a command has a duration limit set. If it does, and the target
1082 * device supports CDL and the feature is enabled, return the limit
1083 * descriptor index to use. Return 0 (no limit) otherwise.
1085 static int sd_cdl_dld(struct scsi_disk
*sdkp
, struct scsi_cmnd
*scmd
)
1087 struct scsi_device
*sdp
= sdkp
->device
;
1090 if (!sdp
->cdl_supported
|| !sdp
->cdl_enable
)
1094 * Use "no limit" if the request ioprio does not specify a duration
1097 hint
= IOPRIO_PRIO_HINT(req_get_ioprio(scsi_cmd_to_rq(scmd
)));
1098 if (hint
< IOPRIO_HINT_DEV_DURATION_LIMIT_1
||
1099 hint
> IOPRIO_HINT_DEV_DURATION_LIMIT_7
)
1102 return (hint
- IOPRIO_HINT_DEV_DURATION_LIMIT_1
) + 1;
1105 static blk_status_t
sd_setup_read_write_cmnd(struct scsi_cmnd
*cmd
)
1107 struct request
*rq
= scsi_cmd_to_rq(cmd
);
1108 struct scsi_device
*sdp
= cmd
->device
;
1109 struct scsi_disk
*sdkp
= scsi_disk(rq
->q
->disk
);
1110 sector_t lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1112 unsigned int nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1113 unsigned int mask
= logical_to_sectors(sdp
, 1) - 1;
1114 bool write
= rq_data_dir(rq
) == WRITE
;
1115 unsigned char protect
, fua
;
1121 ret
= scsi_alloc_sgtables(cmd
);
1122 if (ret
!= BLK_STS_OK
)
1125 ret
= BLK_STS_IOERR
;
1126 if (!scsi_device_online(sdp
) || sdp
->changed
) {
1127 scmd_printk(KERN_ERR
, cmd
, "device offline or changed\n");
1131 if (blk_rq_pos(rq
) + blk_rq_sectors(rq
) > get_capacity(rq
->q
->disk
)) {
1132 scmd_printk(KERN_ERR
, cmd
, "access beyond end of device\n");
1136 if ((blk_rq_pos(rq
) & mask
) || (blk_rq_sectors(rq
) & mask
)) {
1137 scmd_printk(KERN_ERR
, cmd
, "request not aligned to the logical block size\n");
1142 * Some SD card readers can't handle accesses which touch the
1143 * last one or two logical blocks. Split accesses as needed.
1145 threshold
= sdkp
->capacity
- SD_LAST_BUGGY_SECTORS
;
1147 if (unlikely(sdp
->last_sector_bug
&& lba
+ nr_blocks
> threshold
)) {
1148 if (lba
< threshold
) {
1149 /* Access up to the threshold but not beyond */
1150 nr_blocks
= threshold
- lba
;
1152 /* Access only a single logical block */
1157 if (req_op(rq
) == REQ_OP_ZONE_APPEND
) {
1158 ret
= sd_zbc_prepare_zone_append(cmd
, &lba
, nr_blocks
);
1163 fua
= rq
->cmd_flags
& REQ_FUA
? 0x8 : 0;
1164 dix
= scsi_prot_sg_count(cmd
);
1165 dif
= scsi_host_dif_capable(cmd
->device
->host
, sdkp
->protection_type
);
1166 dld
= sd_cdl_dld(sdkp
, cmd
);
1169 protect
= sd_setup_protect_cmnd(cmd
, dix
, dif
);
1173 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1174 ret
= sd_setup_rw32_cmnd(cmd
, write
, lba
, nr_blocks
,
1175 protect
| fua
, dld
);
1176 } else if (sdp
->use_16_for_rw
|| (nr_blocks
> 0xffff)) {
1177 ret
= sd_setup_rw16_cmnd(cmd
, write
, lba
, nr_blocks
,
1178 protect
| fua
, dld
);
1179 } else if ((nr_blocks
> 0xff) || (lba
> 0x1fffff) ||
1180 sdp
->use_10_for_rw
|| protect
) {
1181 ret
= sd_setup_rw10_cmnd(cmd
, write
, lba
, nr_blocks
,
1184 ret
= sd_setup_rw6_cmnd(cmd
, write
, lba
, nr_blocks
,
1188 if (unlikely(ret
!= BLK_STS_OK
))
1192 * We shouldn't disconnect in the middle of a sector, so with a dumb
1193 * host adapter, it's safe to assume that we can at least transfer
1194 * this many bytes between each connect / disconnect.
1196 cmd
->transfersize
= sdp
->sector_size
;
1197 cmd
->underflow
= nr_blocks
<< 9;
1198 cmd
->allowed
= sdkp
->max_retries
;
1199 cmd
->sdb
.length
= nr_blocks
* sdp
->sector_size
;
1202 scmd_printk(KERN_INFO
, cmd
,
1203 "%s: block=%llu, count=%d\n", __func__
,
1204 (unsigned long long)blk_rq_pos(rq
),
1205 blk_rq_sectors(rq
)));
1207 scmd_printk(KERN_INFO
, cmd
,
1208 "%s %d/%u 512 byte blocks.\n",
1209 write
? "writing" : "reading", nr_blocks
,
1210 blk_rq_sectors(rq
)));
1213 * This indicates that the command is ready from our end to be queued.
1217 scsi_free_sgtables(cmd
);
1221 static blk_status_t
sd_init_command(struct scsi_cmnd
*cmd
)
1223 struct request
*rq
= scsi_cmd_to_rq(cmd
);
1225 switch (req_op(rq
)) {
1226 case REQ_OP_DISCARD
:
1227 switch (scsi_disk(rq
->q
->disk
)->provisioning_mode
) {
1229 return sd_setup_unmap_cmnd(cmd
);
1231 return sd_setup_write_same16_cmnd(cmd
, true);
1233 return sd_setup_write_same10_cmnd(cmd
, true);
1235 return sd_setup_write_same10_cmnd(cmd
, false);
1237 return BLK_STS_TARGET
;
1239 case REQ_OP_WRITE_ZEROES
:
1240 return sd_setup_write_zeroes_cmnd(cmd
);
1242 return sd_setup_flush_cmnd(cmd
);
1245 case REQ_OP_ZONE_APPEND
:
1246 return sd_setup_read_write_cmnd(cmd
);
1247 case REQ_OP_ZONE_RESET
:
1248 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1250 case REQ_OP_ZONE_RESET_ALL
:
1251 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1253 case REQ_OP_ZONE_OPEN
:
1254 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_OPEN_ZONE
, false);
1255 case REQ_OP_ZONE_CLOSE
:
1256 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_CLOSE_ZONE
, false);
1257 case REQ_OP_ZONE_FINISH
:
1258 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_FINISH_ZONE
, false);
1261 return BLK_STS_NOTSUPP
;
1265 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1267 struct request
*rq
= scsi_cmd_to_rq(SCpnt
);
1269 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1270 mempool_free(rq
->special_vec
.bv_page
, sd_page_pool
);
1273 static bool sd_need_revalidate(struct gendisk
*disk
, struct scsi_disk
*sdkp
)
1275 if (sdkp
->device
->removable
|| sdkp
->write_prot
) {
1276 if (disk_check_media_change(disk
))
1281 * Force a full rescan after ioctl(BLKRRPART). While the disk state has
1282 * nothing to do with partitions, BLKRRPART is used to force a full
1283 * revalidate after things like a format for historical reasons.
1285 return test_bit(GD_NEED_PART_SCAN
, &disk
->state
);
1289 * sd_open - open a scsi disk device
1290 * @disk: disk to open
1293 * Returns 0 if successful. Returns a negated errno value in case
1296 * Note: This can be called from a user context (e.g. fsck(1) )
1297 * or from within the kernel (e.g. as a result of a mount(1) ).
1298 * In the latter case @inode and @filp carry an abridged amount
1299 * of information as noted above.
1301 * Locking: called with disk->open_mutex held.
1303 static int sd_open(struct gendisk
*disk
, blk_mode_t mode
)
1305 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1306 struct scsi_device
*sdev
= sdkp
->device
;
1309 if (scsi_device_get(sdev
))
1312 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1315 * If the device is in error recovery, wait until it is done.
1316 * If the device is offline, then disallow any access to it.
1319 if (!scsi_block_when_processing_errors(sdev
))
1322 if (sd_need_revalidate(disk
, sdkp
))
1323 sd_revalidate_disk(disk
);
1326 * If the drive is empty, just let the open fail.
1328 retval
= -ENOMEDIUM
;
1329 if (sdev
->removable
&& !sdkp
->media_present
&&
1330 !(mode
& BLK_OPEN_NDELAY
))
1334 * If the device has the write protect tab set, have the open fail
1335 * if the user expects to be able to write to the thing.
1338 if (sdkp
->write_prot
&& (mode
& BLK_OPEN_WRITE
))
1342 * It is possible that the disk changing stuff resulted in
1343 * the device being taken offline. If this is the case,
1344 * report this to the user, and don't pretend that the
1345 * open actually succeeded.
1348 if (!scsi_device_online(sdev
))
1351 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1352 if (scsi_block_when_processing_errors(sdev
))
1353 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1359 scsi_device_put(sdev
);
1364 * sd_release - invoked when the (last) close(2) is called on this
1366 * @disk: disk to release
1370 * Note: may block (uninterruptible) if error recovery is underway
1373 * Locking: called with disk->open_mutex held.
1375 static void sd_release(struct gendisk
*disk
)
1377 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1378 struct scsi_device
*sdev
= sdkp
->device
;
1380 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1382 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1383 if (scsi_block_when_processing_errors(sdev
))
1384 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1387 scsi_device_put(sdev
);
1390 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1392 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1393 struct scsi_device
*sdp
= sdkp
->device
;
1394 struct Scsi_Host
*host
= sdp
->host
;
1395 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1398 /* default to most commonly used values */
1399 diskinfo
[0] = 0x40; /* 1 << 6 */
1400 diskinfo
[1] = 0x20; /* 1 << 5 */
1401 diskinfo
[2] = capacity
>> 11;
1403 /* override with calculated, extended default, or driver values */
1404 if (host
->hostt
->bios_param
)
1405 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1407 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1409 geo
->heads
= diskinfo
[0];
1410 geo
->sectors
= diskinfo
[1];
1411 geo
->cylinders
= diskinfo
[2];
1416 * sd_ioctl - process an ioctl
1417 * @bdev: target block device
1419 * @cmd: ioctl command number
1420 * @arg: this is third argument given to ioctl(2) system call.
1421 * Often contains a pointer.
1423 * Returns 0 if successful (some ioctls return positive numbers on
1424 * success as well). Returns a negated errno value in case of error.
1426 * Note: most ioctls are forward onto the block subsystem or further
1427 * down in the scsi subsystem.
1429 static int sd_ioctl(struct block_device
*bdev
, blk_mode_t mode
,
1430 unsigned int cmd
, unsigned long arg
)
1432 struct gendisk
*disk
= bdev
->bd_disk
;
1433 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1434 struct scsi_device
*sdp
= sdkp
->device
;
1435 void __user
*p
= (void __user
*)arg
;
1438 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1439 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1441 if (bdev_is_partition(bdev
) && !capable(CAP_SYS_RAWIO
))
1442 return -ENOIOCTLCMD
;
1445 * If we are in the middle of error recovery, don't let anyone
1446 * else try and use this device. Also, if error recovery fails, it
1447 * may try and take the device offline, in which case all further
1448 * access to the device is prohibited.
1450 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1451 (mode
& BLK_OPEN_NDELAY
));
1455 if (is_sed_ioctl(cmd
))
1456 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1457 return scsi_ioctl(sdp
, mode
& BLK_OPEN_WRITE
, cmd
, p
);
1460 static void set_media_not_present(struct scsi_disk
*sdkp
)
1462 if (sdkp
->media_present
)
1463 sdkp
->device
->changed
= 1;
1465 if (sdkp
->device
->removable
) {
1466 sdkp
->media_present
= 0;
1471 static int media_not_present(struct scsi_disk
*sdkp
,
1472 struct scsi_sense_hdr
*sshdr
)
1474 if (!scsi_sense_valid(sshdr
))
1477 /* not invoked for commands that could return deferred errors */
1478 switch (sshdr
->sense_key
) {
1479 case UNIT_ATTENTION
:
1481 /* medium not present */
1482 if (sshdr
->asc
== 0x3A) {
1483 set_media_not_present(sdkp
);
1491 * sd_check_events - check media events
1492 * @disk: kernel device descriptor
1493 * @clearing: disk events currently being cleared
1495 * Returns mask of DISK_EVENT_*.
1497 * Note: this function is invoked from the block subsystem.
1499 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1501 struct scsi_disk
*sdkp
= disk
->private_data
;
1502 struct scsi_device
*sdp
;
1510 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1513 * If the device is offline, don't send any commands - just pretend as
1514 * if the command failed. If the device ever comes back online, we
1515 * can deal with it then. It is only because of unrecoverable errors
1516 * that we would ever take a device offline in the first place.
1518 if (!scsi_device_online(sdp
)) {
1519 set_media_not_present(sdkp
);
1524 * Using TEST_UNIT_READY enables differentiation between drive with
1525 * no cartridge loaded - NOT READY, drive with changed cartridge -
1526 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1528 * Drives that auto spin down. eg iomega jaz 1G, will be started
1529 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1530 * sd_revalidate() is called.
1532 if (scsi_block_when_processing_errors(sdp
)) {
1533 struct scsi_sense_hdr sshdr
= { 0, };
1535 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, sdkp
->max_retries
,
1538 /* failed to execute TUR, assume media not present */
1539 if (retval
< 0 || host_byte(retval
)) {
1540 set_media_not_present(sdkp
);
1544 if (media_not_present(sdkp
, &sshdr
))
1549 * For removable scsi disk we have to recognise the presence
1550 * of a disk in the drive.
1552 if (!sdkp
->media_present
)
1554 sdkp
->media_present
= 1;
1557 * sdp->changed is set under the following conditions:
1559 * Medium present state has changed in either direction.
1560 * Device has indicated UNIT_ATTENTION.
1562 disk_changed
= sdp
->changed
;
1564 return disk_changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1567 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1570 struct scsi_device
*sdp
= sdkp
->device
;
1571 const int timeout
= sdp
->request_queue
->rq_timeout
1572 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1573 struct scsi_sense_hdr my_sshdr
;
1574 const struct scsi_exec_args exec_args
= {
1575 .req_flags
= BLK_MQ_REQ_PM
,
1576 /* caller might not be interested in sense, but we need it */
1577 .sshdr
= sshdr
? : &my_sshdr
,
1580 if (!scsi_device_online(sdp
))
1583 sshdr
= exec_args
.sshdr
;
1585 for (retries
= 3; retries
> 0; --retries
) {
1586 unsigned char cmd
[16] = { 0 };
1588 if (sdp
->use_16_for_sync
)
1589 cmd
[0] = SYNCHRONIZE_CACHE_16
;
1591 cmd
[0] = SYNCHRONIZE_CACHE
;
1593 * Leave the rest of the command zero to indicate
1596 res
= scsi_execute_cmd(sdp
, cmd
, REQ_OP_DRV_IN
, NULL
, 0,
1597 timeout
, sdkp
->max_retries
, &exec_args
);
1603 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1608 if (scsi_status_is_check_condition(res
) &&
1609 scsi_sense_valid(sshdr
)) {
1610 sd_print_sense_hdr(sdkp
, sshdr
);
1612 /* we need to evaluate the error return */
1613 if (sshdr
->asc
== 0x3a || /* medium not present */
1614 sshdr
->asc
== 0x20 || /* invalid command */
1615 (sshdr
->asc
== 0x74 && sshdr
->ascq
== 0x71)) /* drive is password locked */
1616 /* this is no error here */
1620 switch (host_byte(res
)) {
1621 /* ignore errors due to racing a disconnection */
1622 case DID_BAD_TARGET
:
1623 case DID_NO_CONNECT
:
1625 /* signal the upper layer it might try again */
1629 case DID_SOFT_ERROR
:
1638 static void sd_rescan(struct device
*dev
)
1640 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1642 sd_revalidate_disk(sdkp
->disk
);
1645 static int sd_get_unique_id(struct gendisk
*disk
, u8 id
[16],
1646 enum blk_unique_id type
)
1648 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
1649 const struct scsi_vpd
*vpd
;
1650 const unsigned char *d
;
1651 int ret
= -ENXIO
, len
;
1654 vpd
= rcu_dereference(sdev
->vpd_pg83
);
1659 for (d
= vpd
->data
+ 4; d
< vpd
->data
+ vpd
->len
; d
+= d
[3] + 4) {
1660 /* we only care about designators with LU association */
1661 if (((d
[1] >> 4) & 0x3) != 0x00)
1663 if ((d
[1] & 0xf) != type
)
1667 * Only exit early if a 16-byte descriptor was found. Otherwise
1668 * keep looking as one with more entropy might still show up.
1671 if (len
!= 8 && len
!= 12 && len
!= 16)
1674 memcpy(id
, d
+ 4, len
);
1683 static int sd_scsi_to_pr_err(struct scsi_sense_hdr
*sshdr
, int result
)
1685 switch (host_byte(result
)) {
1686 case DID_TRANSPORT_MARGINAL
:
1687 case DID_TRANSPORT_DISRUPTED
:
1689 return PR_STS_RETRY_PATH_FAILURE
;
1690 case DID_NO_CONNECT
:
1691 return PR_STS_PATH_FAILED
;
1692 case DID_TRANSPORT_FAILFAST
:
1693 return PR_STS_PATH_FAST_FAILED
;
1696 switch (status_byte(result
)) {
1697 case SAM_STAT_RESERVATION_CONFLICT
:
1698 return PR_STS_RESERVATION_CONFLICT
;
1699 case SAM_STAT_CHECK_CONDITION
:
1700 if (!scsi_sense_valid(sshdr
))
1701 return PR_STS_IOERR
;
1703 if (sshdr
->sense_key
== ILLEGAL_REQUEST
&&
1704 (sshdr
->asc
== 0x26 || sshdr
->asc
== 0x24))
1709 return PR_STS_IOERR
;
1713 static int sd_pr_in_command(struct block_device
*bdev
, u8 sa
,
1714 unsigned char *data
, int data_len
)
1716 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1717 struct scsi_device
*sdev
= sdkp
->device
;
1718 struct scsi_sense_hdr sshdr
;
1719 u8 cmd
[10] = { PERSISTENT_RESERVE_IN
, sa
};
1720 const struct scsi_exec_args exec_args
= {
1725 put_unaligned_be16(data_len
, &cmd
[7]);
1727 result
= scsi_execute_cmd(sdev
, cmd
, REQ_OP_DRV_IN
, data
, data_len
,
1728 SD_TIMEOUT
, sdkp
->max_retries
, &exec_args
);
1729 if (scsi_status_is_check_condition(result
) &&
1730 scsi_sense_valid(&sshdr
)) {
1731 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1732 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1738 return sd_scsi_to_pr_err(&sshdr
, result
);
1741 static int sd_pr_read_keys(struct block_device
*bdev
, struct pr_keys
*keys_info
)
1743 int result
, i
, data_offset
, num_copy_keys
;
1744 u32 num_keys
= keys_info
->num_keys
;
1745 int data_len
= num_keys
* 8 + 8;
1748 data
= kzalloc(data_len
, GFP_KERNEL
);
1752 result
= sd_pr_in_command(bdev
, READ_KEYS
, data
, data_len
);
1756 keys_info
->generation
= get_unaligned_be32(&data
[0]);
1757 keys_info
->num_keys
= get_unaligned_be32(&data
[4]) / 8;
1760 num_copy_keys
= min(num_keys
, keys_info
->num_keys
);
1762 for (i
= 0; i
< num_copy_keys
; i
++) {
1763 keys_info
->keys
[i
] = get_unaligned_be64(&data
[data_offset
]);
1772 static int sd_pr_read_reservation(struct block_device
*bdev
,
1773 struct pr_held_reservation
*rsv
)
1775 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1776 struct scsi_device
*sdev
= sdkp
->device
;
1780 result
= sd_pr_in_command(bdev
, READ_RESERVATION
, data
, sizeof(data
));
1784 len
= get_unaligned_be32(&data
[4]);
1788 /* Make sure we have at least the key and type */
1790 sdev_printk(KERN_INFO
, sdev
,
1791 "READ RESERVATION failed due to short return buffer of %d bytes\n",
1796 rsv
->generation
= get_unaligned_be32(&data
[0]);
1797 rsv
->key
= get_unaligned_be64(&data
[8]);
1798 rsv
->type
= scsi_pr_type_to_block(data
[21] & 0x0f);
1802 static int sd_pr_out_command(struct block_device
*bdev
, u8 sa
, u64 key
,
1803 u64 sa_key
, enum scsi_pr_type type
, u8 flags
)
1805 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1806 struct scsi_device
*sdev
= sdkp
->device
;
1807 struct scsi_sense_hdr sshdr
;
1808 const struct scsi_exec_args exec_args
= {
1812 u8 cmd
[16] = { 0, };
1813 u8 data
[24] = { 0, };
1815 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1818 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1820 put_unaligned_be64(key
, &data
[0]);
1821 put_unaligned_be64(sa_key
, &data
[8]);
1824 result
= scsi_execute_cmd(sdev
, cmd
, REQ_OP_DRV_OUT
, &data
,
1825 sizeof(data
), SD_TIMEOUT
, sdkp
->max_retries
,
1828 if (scsi_status_is_check_condition(result
) &&
1829 scsi_sense_valid(&sshdr
)) {
1830 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1831 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1837 return sd_scsi_to_pr_err(&sshdr
, result
);
1840 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1843 if (flags
& ~PR_FL_IGNORE_KEY
)
1845 return sd_pr_out_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1846 old_key
, new_key
, 0,
1847 (1 << 0) /* APTPL */);
1850 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1855 return sd_pr_out_command(bdev
, 0x01, key
, 0,
1856 block_pr_type_to_scsi(type
), 0);
1859 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1861 return sd_pr_out_command(bdev
, 0x02, key
, 0,
1862 block_pr_type_to_scsi(type
), 0);
1865 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1866 enum pr_type type
, bool abort
)
1868 return sd_pr_out_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1869 block_pr_type_to_scsi(type
), 0);
1872 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1874 return sd_pr_out_command(bdev
, 0x03, key
, 0, 0, 0);
1877 static const struct pr_ops sd_pr_ops
= {
1878 .pr_register
= sd_pr_register
,
1879 .pr_reserve
= sd_pr_reserve
,
1880 .pr_release
= sd_pr_release
,
1881 .pr_preempt
= sd_pr_preempt
,
1882 .pr_clear
= sd_pr_clear
,
1883 .pr_read_keys
= sd_pr_read_keys
,
1884 .pr_read_reservation
= sd_pr_read_reservation
,
1887 static void scsi_disk_free_disk(struct gendisk
*disk
)
1889 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1891 put_device(&sdkp
->disk_dev
);
1894 static const struct block_device_operations sd_fops
= {
1895 .owner
= THIS_MODULE
,
1897 .release
= sd_release
,
1899 .getgeo
= sd_getgeo
,
1900 .compat_ioctl
= blkdev_compat_ptr_ioctl
,
1901 .check_events
= sd_check_events
,
1902 .unlock_native_capacity
= sd_unlock_native_capacity
,
1903 .report_zones
= sd_zbc_report_zones
,
1904 .get_unique_id
= sd_get_unique_id
,
1905 .free_disk
= scsi_disk_free_disk
,
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(scsi_cmd_to_rq(scmd
)->q
->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(scsi_cmd_to_rq(scmd
)->q
->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
= scsi_cmd_to_rq(scmd
);
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 request
*req
= scsi_cmd_to_rq(SCpnt
);
2040 struct scsi_disk
*sdkp
= scsi_disk(req
->q
->disk
);
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_ZONE_RESET
:
2048 case REQ_OP_ZONE_RESET_ALL
:
2049 case REQ_OP_ZONE_OPEN
:
2050 case REQ_OP_ZONE_CLOSE
:
2051 case REQ_OP_ZONE_FINISH
:
2053 good_bytes
= blk_rq_bytes(req
);
2054 scsi_set_resid(SCpnt
, 0);
2057 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
2062 * In case of bogus fw or device, we could end up having
2063 * an unaligned partial completion. Check this here and force
2066 resid
= scsi_get_resid(SCpnt
);
2067 if (resid
& (sector_size
- 1)) {
2068 sd_printk(KERN_INFO
, sdkp
,
2069 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2070 resid
, sector_size
);
2071 scsi_print_command(SCpnt
);
2072 resid
= min(scsi_bufflen(SCpnt
),
2073 round_up(resid
, sector_size
));
2074 scsi_set_resid(SCpnt
, resid
);
2079 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
2081 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
2083 sdkp
->medium_access_timed_out
= 0;
2085 if (!scsi_status_is_check_condition(result
) &&
2086 (!sense_valid
|| sense_deferred
))
2089 switch (sshdr
.sense_key
) {
2090 case HARDWARE_ERROR
:
2092 good_bytes
= sd_completed_bytes(SCpnt
);
2094 case RECOVERED_ERROR
:
2095 good_bytes
= scsi_bufflen(SCpnt
);
2098 /* This indicates a false check condition, so ignore it. An
2099 * unknown amount of data was transferred so treat it as an
2103 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2105 case ABORTED_COMMAND
:
2106 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2107 good_bytes
= sd_completed_bytes(SCpnt
);
2109 case ILLEGAL_REQUEST
:
2110 switch (sshdr
.asc
) {
2111 case 0x10: /* DIX: Host detected corruption */
2112 good_bytes
= sd_completed_bytes(SCpnt
);
2114 case 0x20: /* INVALID COMMAND OPCODE */
2115 case 0x24: /* INVALID FIELD IN CDB */
2116 switch (SCpnt
->cmnd
[0]) {
2118 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2122 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2123 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2125 sdkp
->device
->no_write_same
= 1;
2126 sd_config_write_same(sdkp
);
2127 req
->rq_flags
|= RQF_QUIET
;
2138 if (sd_is_zoned(sdkp
))
2139 good_bytes
= sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2141 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2142 "sd_done: completed %d of %d bytes\n",
2143 good_bytes
, scsi_bufflen(SCpnt
)));
2149 * spinup disk - called only in sd_revalidate_disk()
2152 sd_spinup_disk(struct scsi_disk
*sdkp
)
2154 unsigned char cmd
[10];
2155 unsigned long spintime_expire
= 0;
2156 int retries
, spintime
;
2157 unsigned int the_result
;
2158 struct scsi_sense_hdr sshdr
;
2159 const struct scsi_exec_args exec_args
= {
2162 int sense_valid
= 0;
2166 /* Spin up drives, as required. Only do this at boot time */
2167 /* Spinup needs to be done for module loads too. */
2172 bool media_was_present
= sdkp
->media_present
;
2174 cmd
[0] = TEST_UNIT_READY
;
2175 memset((void *) &cmd
[1], 0, 9);
2177 the_result
= scsi_execute_cmd(sdkp
->device
, cmd
,
2178 REQ_OP_DRV_IN
, NULL
, 0,
2184 * If the drive has indicated to us that it
2185 * doesn't have any media in it, don't bother
2186 * with any more polling.
2188 if (media_not_present(sdkp
, &sshdr
)) {
2189 if (media_was_present
)
2190 sd_printk(KERN_NOTICE
, sdkp
, "Media removed, stopped polling\n");
2195 sense_valid
= scsi_sense_valid(&sshdr
);
2197 } while (retries
< 3 &&
2198 (!scsi_status_is_good(the_result
) ||
2199 (scsi_status_is_check_condition(the_result
) &&
2200 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2202 if (!scsi_status_is_check_condition(the_result
)) {
2203 /* no sense, TUR either succeeded or failed
2204 * with a status error */
2205 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2206 sd_print_result(sdkp
, "Test Unit Ready failed",
2213 * The device does not want the automatic start to be issued.
2215 if (sdkp
->device
->no_start_on_add
)
2218 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2219 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2220 break; /* manual intervention required */
2221 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2222 break; /* standby */
2223 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2224 break; /* unavailable */
2225 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2226 break; /* sanitize in progress */
2228 * Issue command to spin up drive when not ready
2231 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2232 cmd
[0] = START_STOP
;
2233 cmd
[1] = 1; /* Return immediately */
2234 memset((void *) &cmd
[2], 0, 8);
2235 cmd
[4] = 1; /* Start spin cycle */
2236 if (sdkp
->device
->start_stop_pwr_cond
)
2238 scsi_execute_cmd(sdkp
->device
, cmd
,
2239 REQ_OP_DRV_IN
, NULL
, 0,
2240 SD_TIMEOUT
, sdkp
->max_retries
,
2242 spintime_expire
= jiffies
+ 100 * HZ
;
2245 /* Wait 1 second for next try */
2247 printk(KERN_CONT
".");
2250 * Wait for USB flash devices with slow firmware.
2251 * Yes, this sense key/ASC combination shouldn't
2252 * occur here. It's characteristic of these devices.
2254 } else if (sense_valid
&&
2255 sshdr
.sense_key
== UNIT_ATTENTION
&&
2256 sshdr
.asc
== 0x28) {
2258 spintime_expire
= jiffies
+ 5 * HZ
;
2261 /* Wait 1 second for next try */
2264 /* we don't understand the sense code, so it's
2265 * probably pointless to loop */
2267 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2268 sd_print_sense_hdr(sdkp
, &sshdr
);
2273 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2276 if (scsi_status_is_good(the_result
))
2277 printk(KERN_CONT
"ready\n");
2279 printk(KERN_CONT
"not responding...\n");
2284 * Determine whether disk supports Data Integrity Field.
2286 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2288 struct scsi_device
*sdp
= sdkp
->device
;
2291 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0) {
2292 sdkp
->protection_type
= 0;
2296 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2298 if (type
> T10_PI_TYPE3_PROTECTION
) {
2299 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2300 " protection type %u. Disabling disk!\n",
2302 sdkp
->protection_type
= 0;
2306 sdkp
->protection_type
= type
;
2311 static void sd_config_protection(struct scsi_disk
*sdkp
)
2313 struct scsi_device
*sdp
= sdkp
->device
;
2315 sd_dif_config_host(sdkp
);
2317 if (!sdkp
->protection_type
)
2320 if (!scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
)) {
2321 sd_first_printk(KERN_NOTICE
, sdkp
,
2322 "Disabling DIF Type %u protection\n",
2323 sdkp
->protection_type
);
2324 sdkp
->protection_type
= 0;
2327 sd_first_printk(KERN_NOTICE
, sdkp
, "Enabling DIF Type %u protection\n",
2328 sdkp
->protection_type
);
2331 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2332 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2336 sd_print_sense_hdr(sdkp
, sshdr
);
2338 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2341 * Set dirty bit for removable devices if not ready -
2342 * sometimes drives will not report this properly.
2344 if (sdp
->removable
&&
2345 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2346 set_media_not_present(sdkp
);
2349 * We used to set media_present to 0 here to indicate no media
2350 * in the drive, but some drives fail read capacity even with
2351 * media present, so we can't do that.
2353 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2357 #if RC16_LEN > SD_BUF_SIZE
2358 #error RC16_LEN must not be more than SD_BUF_SIZE
2361 #define READ_CAPACITY_RETRIES_ON_RESET 10
2363 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2364 unsigned char *buffer
)
2366 unsigned char cmd
[16];
2367 struct scsi_sense_hdr sshdr
;
2368 const struct scsi_exec_args exec_args
= {
2371 int sense_valid
= 0;
2373 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2374 unsigned int alignment
;
2375 unsigned long long lba
;
2376 unsigned sector_size
;
2378 if (sdp
->no_read_capacity_16
)
2383 cmd
[0] = SERVICE_ACTION_IN_16
;
2384 cmd
[1] = SAI_READ_CAPACITY_16
;
2386 memset(buffer
, 0, RC16_LEN
);
2388 the_result
= scsi_execute_cmd(sdp
, cmd
, REQ_OP_DRV_IN
,
2389 buffer
, RC16_LEN
, SD_TIMEOUT
,
2390 sdkp
->max_retries
, &exec_args
);
2392 if (media_not_present(sdkp
, &sshdr
))
2395 if (the_result
> 0) {
2396 sense_valid
= scsi_sense_valid(&sshdr
);
2398 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2399 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2401 /* Invalid Command Operation Code or
2402 * Invalid Field in CDB, just retry
2403 * silently with RC10 */
2406 sshdr
.sense_key
== UNIT_ATTENTION
&&
2407 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2408 /* Device reset might occur several times,
2409 * give it one more chance */
2410 if (--reset_retries
> 0)
2415 } while (the_result
&& retries
);
2418 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2419 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2423 sector_size
= get_unaligned_be32(&buffer
[8]);
2424 lba
= get_unaligned_be64(&buffer
[0]);
2426 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2431 /* Logical blocks per physical block exponent */
2432 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2435 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2437 /* Lowest aligned logical block */
2438 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2439 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2440 if (alignment
&& sdkp
->first_scan
)
2441 sd_printk(KERN_NOTICE
, sdkp
,
2442 "physical block alignment offset: %u\n", alignment
);
2444 if (buffer
[14] & 0x80) { /* LBPME */
2447 if (buffer
[14] & 0x40) /* LBPRZ */
2450 sd_config_discard(sdkp
, SD_LBP_WS16
);
2453 sdkp
->capacity
= lba
+ 1;
2457 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2458 unsigned char *buffer
)
2460 unsigned char cmd
[16];
2461 struct scsi_sense_hdr sshdr
;
2462 const struct scsi_exec_args exec_args
= {
2465 int sense_valid
= 0;
2467 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2469 unsigned sector_size
;
2472 cmd
[0] = READ_CAPACITY
;
2473 memset(&cmd
[1], 0, 9);
2474 memset(buffer
, 0, 8);
2476 the_result
= scsi_execute_cmd(sdp
, cmd
, REQ_OP_DRV_IN
, buffer
,
2477 8, SD_TIMEOUT
, sdkp
->max_retries
,
2480 if (media_not_present(sdkp
, &sshdr
))
2483 if (the_result
> 0) {
2484 sense_valid
= scsi_sense_valid(&sshdr
);
2486 sshdr
.sense_key
== UNIT_ATTENTION
&&
2487 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2488 /* Device reset might occur several times,
2489 * give it one more chance */
2490 if (--reset_retries
> 0)
2495 } while (the_result
&& retries
);
2498 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2499 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2503 sector_size
= get_unaligned_be32(&buffer
[4]);
2504 lba
= get_unaligned_be32(&buffer
[0]);
2506 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2507 /* Some buggy (usb cardreader) devices return an lba of
2508 0xffffffff when the want to report a size of 0 (with
2509 which they really mean no media is present) */
2511 sdkp
->physical_block_size
= sector_size
;
2515 sdkp
->capacity
= lba
+ 1;
2516 sdkp
->physical_block_size
= sector_size
;
2520 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2522 if (sdp
->host
->max_cmd_len
< 16)
2524 if (sdp
->try_rc_10_first
)
2526 if (sdp
->scsi_level
> SCSI_SPC_2
)
2528 if (scsi_device_protection(sdp
))
2534 * read disk capacity
2537 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2540 struct scsi_device
*sdp
= sdkp
->device
;
2542 if (sd_try_rc16_first(sdp
)) {
2543 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2544 if (sector_size
== -EOVERFLOW
)
2546 if (sector_size
== -ENODEV
)
2548 if (sector_size
< 0)
2549 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2550 if (sector_size
< 0)
2553 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2554 if (sector_size
== -EOVERFLOW
)
2556 if (sector_size
< 0)
2558 if ((sizeof(sdkp
->capacity
) > 4) &&
2559 (sdkp
->capacity
> 0xffffffffULL
)) {
2560 int old_sector_size
= sector_size
;
2561 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2562 "Trying to use READ CAPACITY(16).\n");
2563 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2564 if (sector_size
< 0) {
2565 sd_printk(KERN_NOTICE
, sdkp
,
2566 "Using 0xffffffff as device size\n");
2567 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2568 sector_size
= old_sector_size
;
2571 /* Remember that READ CAPACITY(16) succeeded */
2572 sdp
->try_rc_10_first
= 0;
2576 /* Some devices are known to return the total number of blocks,
2577 * not the highest block number. Some devices have versions
2578 * which do this and others which do not. Some devices we might
2579 * suspect of doing this but we don't know for certain.
2581 * If we know the reported capacity is wrong, decrement it. If
2582 * we can only guess, then assume the number of blocks is even
2583 * (usually true but not always) and err on the side of lowering
2586 if (sdp
->fix_capacity
||
2587 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2588 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2589 "from its reported value: %llu\n",
2590 (unsigned long long) sdkp
->capacity
);
2595 if (sector_size
== 0) {
2597 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2601 if (sector_size
!= 512 &&
2602 sector_size
!= 1024 &&
2603 sector_size
!= 2048 &&
2604 sector_size
!= 4096) {
2605 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2608 * The user might want to re-format the drive with
2609 * a supported sectorsize. Once this happens, it
2610 * would be relatively trivial to set the thing up.
2611 * For this reason, we leave the thing in the table.
2615 * set a bogus sector size so the normal read/write
2616 * logic in the block layer will eventually refuse any
2617 * request on this device without tripping over power
2618 * of two sector size assumptions
2622 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2623 blk_queue_physical_block_size(sdp
->request_queue
,
2624 sdkp
->physical_block_size
);
2625 sdkp
->device
->sector_size
= sector_size
;
2627 if (sdkp
->capacity
> 0xffffffff)
2628 sdp
->use_16_for_rw
= 1;
2633 * Print disk capacity
2636 sd_print_capacity(struct scsi_disk
*sdkp
,
2637 sector_t old_capacity
)
2639 int sector_size
= sdkp
->device
->sector_size
;
2640 char cap_str_2
[10], cap_str_10
[10];
2642 if (!sdkp
->first_scan
&& old_capacity
== sdkp
->capacity
)
2645 string_get_size(sdkp
->capacity
, sector_size
,
2646 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2647 string_get_size(sdkp
->capacity
, sector_size
,
2648 STRING_UNITS_10
, cap_str_10
, sizeof(cap_str_10
));
2650 sd_printk(KERN_NOTICE
, sdkp
,
2651 "%llu %d-byte logical blocks: (%s/%s)\n",
2652 (unsigned long long)sdkp
->capacity
,
2653 sector_size
, cap_str_10
, cap_str_2
);
2655 if (sdkp
->physical_block_size
!= sector_size
)
2656 sd_printk(KERN_NOTICE
, sdkp
,
2657 "%u-byte physical blocks\n",
2658 sdkp
->physical_block_size
);
2661 /* called with buffer of length 512 */
2663 sd_do_mode_sense(struct scsi_disk
*sdkp
, int dbd
, int modepage
,
2664 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2665 struct scsi_sense_hdr
*sshdr
)
2668 * If we must use MODE SENSE(10), make sure that the buffer length
2669 * is at least 8 bytes so that the mode sense header fits.
2671 if (sdkp
->device
->use_10_for_ms
&& len
< 8)
2674 return scsi_mode_sense(sdkp
->device
, dbd
, modepage
, 0, buffer
, len
,
2675 SD_TIMEOUT
, sdkp
->max_retries
, data
, sshdr
);
2679 * read write protect setting, if possible - called only in sd_revalidate_disk()
2680 * called with buffer of length SD_BUF_SIZE
2683 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2686 struct scsi_device
*sdp
= sdkp
->device
;
2687 struct scsi_mode_data data
;
2688 int old_wp
= sdkp
->write_prot
;
2690 set_disk_ro(sdkp
->disk
, 0);
2691 if (sdp
->skip_ms_page_3f
) {
2692 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2696 if (sdp
->use_192_bytes_for_3f
) {
2697 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2700 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2701 * We have to start carefully: some devices hang if we ask
2702 * for more than is available.
2704 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2707 * Second attempt: ask for page 0 When only page 0 is
2708 * implemented, a request for page 3F may return Sense Key
2709 * 5: Illegal Request, Sense Code 24: Invalid field in
2713 res
= sd_do_mode_sense(sdkp
, 0, 0, buffer
, 4, &data
, NULL
);
2716 * Third attempt: ask 255 bytes, as we did earlier.
2719 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 255,
2724 sd_first_printk(KERN_WARNING
, sdkp
,
2725 "Test WP failed, assume Write Enabled\n");
2727 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2728 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2729 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2730 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2731 sdkp
->write_prot
? "on" : "off");
2732 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2738 * sd_read_cache_type - called only from sd_revalidate_disk()
2739 * called with buffer of length SD_BUF_SIZE
2742 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2745 struct scsi_device
*sdp
= sdkp
->device
;
2750 struct scsi_mode_data data
;
2751 struct scsi_sense_hdr sshdr
;
2752 int old_wce
= sdkp
->WCE
;
2753 int old_rcd
= sdkp
->RCD
;
2754 int old_dpofua
= sdkp
->DPOFUA
;
2757 if (sdkp
->cache_override
)
2761 if (sdp
->skip_ms_page_8
) {
2762 if (sdp
->type
== TYPE_RBC
)
2765 if (sdp
->skip_ms_page_3f
)
2768 if (sdp
->use_192_bytes_for_3f
)
2772 } else if (sdp
->type
== TYPE_RBC
) {
2780 /* cautiously ask */
2781 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, first_len
,
2787 if (!data
.header_length
) {
2790 sd_first_printk(KERN_ERR
, sdkp
,
2791 "Missing header in MODE_SENSE response\n");
2794 /* that went OK, now ask for the proper length */
2798 * We're only interested in the first three bytes, actually.
2799 * But the data cache page is defined for the first 20.
2803 else if (len
> SD_BUF_SIZE
) {
2804 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2805 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2808 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2812 if (len
> first_len
)
2813 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, len
,
2817 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2819 while (offset
< len
) {
2820 u8 page_code
= buffer
[offset
] & 0x3F;
2821 u8 spf
= buffer
[offset
] & 0x40;
2823 if (page_code
== 8 || page_code
== 6) {
2824 /* We're interested only in the first 3 bytes.
2826 if (len
- offset
<= 2) {
2827 sd_first_printk(KERN_ERR
, sdkp
,
2828 "Incomplete mode parameter "
2832 modepage
= page_code
;
2836 /* Go to the next page */
2837 if (spf
&& len
- offset
> 3)
2838 offset
+= 4 + (buffer
[offset
+2] << 8) +
2840 else if (!spf
&& len
- offset
> 1)
2841 offset
+= 2 + buffer
[offset
+1];
2843 sd_first_printk(KERN_ERR
, sdkp
,
2845 "parameter data\n");
2851 sd_first_printk(KERN_WARNING
, sdkp
,
2852 "No Caching mode page found\n");
2856 if (modepage
== 8) {
2857 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2858 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2860 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2864 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2865 if (sdp
->broken_fua
) {
2866 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2868 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2869 !sdkp
->device
->use_16_for_rw
) {
2870 sd_first_printk(KERN_NOTICE
, sdkp
,
2871 "Uses READ/WRITE(6), disabling FUA\n");
2875 /* No cache flush allowed for write protected devices */
2876 if (sdkp
->WCE
&& sdkp
->write_prot
)
2879 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2880 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2881 sd_printk(KERN_NOTICE
, sdkp
,
2882 "Write cache: %s, read cache: %s, %s\n",
2883 sdkp
->WCE
? "enabled" : "disabled",
2884 sdkp
->RCD
? "disabled" : "enabled",
2885 sdkp
->DPOFUA
? "supports DPO and FUA"
2886 : "doesn't support DPO or FUA");
2892 if (scsi_sense_valid(&sshdr
) &&
2893 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2894 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2895 /* Invalid field in CDB */
2896 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2898 sd_first_printk(KERN_ERR
, sdkp
,
2899 "Asking for cache data failed\n");
2902 if (sdp
->wce_default_on
) {
2903 sd_first_printk(KERN_NOTICE
, sdkp
,
2904 "Assuming drive cache: write back\n");
2907 sd_first_printk(KERN_WARNING
, sdkp
,
2908 "Assuming drive cache: write through\n");
2916 * The ATO bit indicates whether the DIF application tag is available
2917 * for use by the operating system.
2919 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2922 struct scsi_device
*sdp
= sdkp
->device
;
2923 struct scsi_mode_data data
;
2924 struct scsi_sense_hdr sshdr
;
2926 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2929 if (sdkp
->protection_type
== 0)
2932 res
= scsi_mode_sense(sdp
, 1, 0x0a, 0, buffer
, 36, SD_TIMEOUT
,
2933 sdkp
->max_retries
, &data
, &sshdr
);
2935 if (res
< 0 || !data
.header_length
||
2937 sd_first_printk(KERN_WARNING
, sdkp
,
2938 "getting Control mode page failed, assume no ATO\n");
2940 if (scsi_sense_valid(&sshdr
))
2941 sd_print_sense_hdr(sdkp
, &sshdr
);
2946 offset
= data
.header_length
+ data
.block_descriptor_length
;
2948 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2949 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2953 if ((buffer
[offset
+ 5] & 0x80) == 0)
2962 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2963 * @sdkp: disk to query
2965 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2967 struct scsi_vpd
*vpd
;
2971 vpd
= rcu_dereference(sdkp
->device
->vpd_pgb0
);
2972 if (!vpd
|| vpd
->len
< 16)
2975 sdkp
->min_xfer_blocks
= get_unaligned_be16(&vpd
->data
[6]);
2976 sdkp
->max_xfer_blocks
= get_unaligned_be32(&vpd
->data
[8]);
2977 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&vpd
->data
[12]);
2979 if (vpd
->len
>= 64) {
2980 unsigned int lba_count
, desc_count
;
2982 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&vpd
->data
[36]);
2987 lba_count
= get_unaligned_be32(&vpd
->data
[20]);
2988 desc_count
= get_unaligned_be32(&vpd
->data
[24]);
2990 if (lba_count
&& desc_count
)
2991 sdkp
->max_unmap_blocks
= lba_count
;
2993 sdkp
->unmap_granularity
= get_unaligned_be32(&vpd
->data
[28]);
2995 if (vpd
->data
[32] & 0x80)
2996 sdkp
->unmap_alignment
=
2997 get_unaligned_be32(&vpd
->data
[32]) & ~(1 << 31);
2999 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
3001 if (sdkp
->max_unmap_blocks
)
3002 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
3004 sd_config_discard(sdkp
, SD_LBP_WS16
);
3006 } else { /* LBP VPD page tells us what to use */
3007 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
3008 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
3009 else if (sdkp
->lbpws
)
3010 sd_config_discard(sdkp
, SD_LBP_WS16
);
3011 else if (sdkp
->lbpws10
)
3012 sd_config_discard(sdkp
, SD_LBP_WS10
);
3014 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
3023 * sd_read_block_characteristics - Query block dev. characteristics
3024 * @sdkp: disk to query
3026 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
3028 struct request_queue
*q
= sdkp
->disk
->queue
;
3029 struct scsi_vpd
*vpd
;
3034 vpd
= rcu_dereference(sdkp
->device
->vpd_pgb1
);
3036 if (!vpd
|| vpd
->len
< 8) {
3041 rot
= get_unaligned_be16(&vpd
->data
[4]);
3042 zoned
= (vpd
->data
[8] >> 4) & 3;
3046 blk_queue_flag_set(QUEUE_FLAG_NONROT
, q
);
3047 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM
, q
);
3050 if (sdkp
->device
->type
== TYPE_ZBC
) {
3052 * Host-managed: Per ZBC and ZAC specifications, writes in
3053 * sequential write required zones of host-managed devices must
3054 * be aligned to the device physical block size.
3056 disk_set_zoned(sdkp
->disk
, BLK_ZONED_HM
);
3057 blk_queue_zone_write_granularity(q
, sdkp
->physical_block_size
);
3059 sdkp
->zoned
= zoned
;
3060 if (sdkp
->zoned
== 1) {
3062 disk_set_zoned(sdkp
->disk
, BLK_ZONED_HA
);
3064 /* Regular disk or drive managed disk */
3065 disk_set_zoned(sdkp
->disk
, BLK_ZONED_NONE
);
3069 if (!sdkp
->first_scan
)
3072 if (blk_queue_is_zoned(q
)) {
3073 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
3074 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
3076 if (sdkp
->zoned
== 1)
3077 sd_printk(KERN_NOTICE
, sdkp
,
3078 "Host-aware SMR disk used as regular disk\n");
3079 else if (sdkp
->zoned
== 2)
3080 sd_printk(KERN_NOTICE
, sdkp
,
3081 "Drive-managed SMR disk\n");
3086 * sd_read_block_provisioning - Query provisioning VPD page
3087 * @sdkp: disk to query
3089 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
3091 struct scsi_vpd
*vpd
;
3093 if (sdkp
->lbpme
== 0)
3097 vpd
= rcu_dereference(sdkp
->device
->vpd_pgb2
);
3099 if (!vpd
|| vpd
->len
< 8) {
3105 sdkp
->lbpu
= (vpd
->data
[5] >> 7) & 1; /* UNMAP */
3106 sdkp
->lbpws
= (vpd
->data
[5] >> 6) & 1; /* WRITE SAME(16) w/ UNMAP */
3107 sdkp
->lbpws10
= (vpd
->data
[5] >> 5) & 1; /* WRITE SAME(10) w/ UNMAP */
3111 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3113 struct scsi_device
*sdev
= sdkp
->device
;
3115 if (sdev
->host
->no_write_same
) {
3116 sdev
->no_write_same
= 1;
3121 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
, 0) < 0) {
3122 struct scsi_vpd
*vpd
;
3124 sdev
->no_report_opcodes
= 1;
3126 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3127 * CODES is unsupported and the device has an ATA
3128 * Information VPD page (SAT).
3131 vpd
= rcu_dereference(sdev
->vpd_pg89
);
3133 sdev
->no_write_same
= 1;
3137 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
, 0) == 1)
3140 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
, 0) == 1)
3144 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3146 struct scsi_device
*sdev
= sdkp
->device
;
3148 if (!sdev
->security_supported
)
3151 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3152 SECURITY_PROTOCOL_IN
, 0) == 1 &&
3153 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3154 SECURITY_PROTOCOL_OUT
, 0) == 1)
3158 static inline sector_t
sd64_to_sectors(struct scsi_disk
*sdkp
, u8
*buf
)
3160 return logical_to_sectors(sdkp
->device
, get_unaligned_be64(buf
));
3164 * sd_read_cpr - Query concurrent positioning ranges
3165 * @sdkp: disk to query
3167 static void sd_read_cpr(struct scsi_disk
*sdkp
)
3169 struct blk_independent_access_ranges
*iars
= NULL
;
3170 unsigned char *buffer
= NULL
;
3171 unsigned int nr_cpr
= 0;
3172 int i
, vpd_len
, buf_len
= SD_BUF_SIZE
;
3176 * We need to have the capacity set first for the block layer to be
3177 * able to check the ranges.
3179 if (sdkp
->first_scan
)
3182 if (!sdkp
->capacity
)
3186 * Concurrent Positioning Ranges VPD: there can be at most 256 ranges,
3187 * leading to a maximum page size of 64 + 256*32 bytes.
3189 buf_len
= 64 + 256*32;
3190 buffer
= kmalloc(buf_len
, GFP_KERNEL
);
3191 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb9, buffer
, buf_len
))
3194 /* We must have at least a 64B header and one 32B range descriptor */
3195 vpd_len
= get_unaligned_be16(&buffer
[2]) + 4;
3196 if (vpd_len
> buf_len
|| vpd_len
< 64 + 32 || (vpd_len
& 31)) {
3197 sd_printk(KERN_ERR
, sdkp
,
3198 "Invalid Concurrent Positioning Ranges VPD page\n");
3202 nr_cpr
= (vpd_len
- 64) / 32;
3208 iars
= disk_alloc_independent_access_ranges(sdkp
->disk
, nr_cpr
);
3215 for (i
= 0; i
< nr_cpr
; i
++, desc
+= 32) {
3217 sd_printk(KERN_ERR
, sdkp
,
3218 "Invalid Concurrent Positioning Range number\n");
3223 iars
->ia_range
[i
].sector
= sd64_to_sectors(sdkp
, desc
+ 8);
3224 iars
->ia_range
[i
].nr_sectors
= sd64_to_sectors(sdkp
, desc
+ 16);
3228 disk_set_independent_access_ranges(sdkp
->disk
, iars
);
3229 if (nr_cpr
&& sdkp
->nr_actuators
!= nr_cpr
) {
3230 sd_printk(KERN_NOTICE
, sdkp
,
3231 "%u concurrent positioning ranges\n", nr_cpr
);
3232 sdkp
->nr_actuators
= nr_cpr
;
3238 static bool sd_validate_min_xfer_size(struct scsi_disk
*sdkp
)
3240 struct scsi_device
*sdp
= sdkp
->device
;
3241 unsigned int min_xfer_bytes
=
3242 logical_to_bytes(sdp
, sdkp
->min_xfer_blocks
);
3244 if (sdkp
->min_xfer_blocks
== 0)
3247 if (min_xfer_bytes
& (sdkp
->physical_block_size
- 1)) {
3248 sd_first_printk(KERN_WARNING
, sdkp
,
3249 "Preferred minimum I/O size %u bytes not a " \
3250 "multiple of physical block size (%u bytes)\n",
3251 min_xfer_bytes
, sdkp
->physical_block_size
);
3252 sdkp
->min_xfer_blocks
= 0;
3256 sd_first_printk(KERN_INFO
, sdkp
, "Preferred minimum I/O size %u bytes\n",
3262 * Determine the device's preferred I/O size for reads and writes
3263 * unless the reported value is unreasonably small, large, not a
3264 * multiple of the physical block size, or simply garbage.
3266 static bool sd_validate_opt_xfer_size(struct scsi_disk
*sdkp
,
3267 unsigned int dev_max
)
3269 struct scsi_device
*sdp
= sdkp
->device
;
3270 unsigned int opt_xfer_bytes
=
3271 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3272 unsigned int min_xfer_bytes
=
3273 logical_to_bytes(sdp
, sdkp
->min_xfer_blocks
);
3275 if (sdkp
->opt_xfer_blocks
== 0)
3278 if (sdkp
->opt_xfer_blocks
> dev_max
) {
3279 sd_first_printk(KERN_WARNING
, sdkp
,
3280 "Optimal transfer size %u logical blocks " \
3281 "> dev_max (%u logical blocks)\n",
3282 sdkp
->opt_xfer_blocks
, dev_max
);
3286 if (sdkp
->opt_xfer_blocks
> SD_DEF_XFER_BLOCKS
) {
3287 sd_first_printk(KERN_WARNING
, sdkp
,
3288 "Optimal transfer size %u logical blocks " \
3289 "> sd driver limit (%u logical blocks)\n",
3290 sdkp
->opt_xfer_blocks
, SD_DEF_XFER_BLOCKS
);
3294 if (opt_xfer_bytes
< PAGE_SIZE
) {
3295 sd_first_printk(KERN_WARNING
, sdkp
,
3296 "Optimal transfer size %u bytes < " \
3297 "PAGE_SIZE (%u bytes)\n",
3298 opt_xfer_bytes
, (unsigned int)PAGE_SIZE
);
3302 if (min_xfer_bytes
&& opt_xfer_bytes
% min_xfer_bytes
) {
3303 sd_first_printk(KERN_WARNING
, sdkp
,
3304 "Optimal transfer size %u bytes not a " \
3305 "multiple of preferred minimum block " \
3306 "size (%u bytes)\n",
3307 opt_xfer_bytes
, min_xfer_bytes
);
3311 if (opt_xfer_bytes
& (sdkp
->physical_block_size
- 1)) {
3312 sd_first_printk(KERN_WARNING
, sdkp
,
3313 "Optimal transfer size %u bytes not a " \
3314 "multiple of physical block size (%u bytes)\n",
3315 opt_xfer_bytes
, sdkp
->physical_block_size
);
3319 sd_first_printk(KERN_INFO
, sdkp
, "Optimal transfer size %u bytes\n",
3325 * sd_revalidate_disk - called the first time a new disk is seen,
3326 * performs disk spin up, read_capacity, etc.
3327 * @disk: struct gendisk we care about
3329 static int sd_revalidate_disk(struct gendisk
*disk
)
3331 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3332 struct scsi_device
*sdp
= sdkp
->device
;
3333 struct request_queue
*q
= sdkp
->disk
->queue
;
3334 sector_t old_capacity
= sdkp
->capacity
;
3335 unsigned char *buffer
;
3336 unsigned int dev_max
, rw_max
;
3338 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3339 "sd_revalidate_disk\n"));
3342 * If the device is offline, don't try and read capacity or any
3343 * of the other niceties.
3345 if (!scsi_device_online(sdp
))
3348 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3350 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3351 "allocation failure.\n");
3355 sd_spinup_disk(sdkp
);
3358 * Without media there is no reason to ask; moreover, some devices
3359 * react badly if we do.
3361 if (sdkp
->media_present
) {
3362 sd_read_capacity(sdkp
, buffer
);
3365 * set the default to rotational. All non-rotational devices
3366 * support the block characteristics VPD page, which will
3367 * cause this to be updated correctly and any device which
3368 * doesn't support it should be treated as rotational.
3370 blk_queue_flag_clear(QUEUE_FLAG_NONROT
, q
);
3371 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM
, q
);
3373 if (scsi_device_supports_vpd(sdp
)) {
3374 sd_read_block_provisioning(sdkp
);
3375 sd_read_block_limits(sdkp
);
3376 sd_read_block_characteristics(sdkp
);
3377 sd_zbc_read_zones(sdkp
, buffer
);
3381 sd_print_capacity(sdkp
, old_capacity
);
3383 sd_read_write_protect_flag(sdkp
, buffer
);
3384 sd_read_cache_type(sdkp
, buffer
);
3385 sd_read_app_tag_own(sdkp
, buffer
);
3386 sd_read_write_same(sdkp
, buffer
);
3387 sd_read_security(sdkp
, buffer
);
3388 sd_config_protection(sdkp
);
3392 * We now have all cache related info, determine how we deal
3393 * with flush requests.
3395 sd_set_flush_flag(sdkp
);
3397 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3398 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3400 /* Some devices report a maximum block count for READ/WRITE requests. */
3401 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3402 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3404 if (sd_validate_min_xfer_size(sdkp
))
3405 blk_queue_io_min(sdkp
->disk
->queue
,
3406 logical_to_bytes(sdp
, sdkp
->min_xfer_blocks
));
3408 blk_queue_io_min(sdkp
->disk
->queue
, 0);
3410 if (sd_validate_opt_xfer_size(sdkp
, dev_max
)) {
3411 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3412 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3414 q
->limits
.io_opt
= 0;
3415 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3416 (sector_t
)BLK_DEF_MAX_SECTORS
);
3420 * Limit default to SCSI host optimal sector limit if set. There may be
3421 * an impact on performance for when the size of a request exceeds this
3424 rw_max
= min_not_zero(rw_max
, sdp
->host
->opt_sectors
);
3426 /* Do not exceed controller limit */
3427 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3430 * Only update max_sectors if previously unset or if the current value
3431 * exceeds the capabilities of the hardware.
3433 if (sdkp
->first_scan
||
3434 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3435 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3436 q
->limits
.max_sectors
= rw_max
;
3438 sdkp
->first_scan
= 0;
3440 set_capacity_and_notify(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3441 sd_config_write_same(sdkp
);
3445 * For a zoned drive, revalidating the zones can be done only once
3446 * the gendisk capacity is set. So if this fails, set back the gendisk
3449 if (sd_zbc_revalidate_zones(sdkp
))
3450 set_capacity_and_notify(disk
, 0);
3457 * sd_unlock_native_capacity - unlock native capacity
3458 * @disk: struct gendisk to set capacity for
3460 * Block layer calls this function if it detects that partitions
3461 * on @disk reach beyond the end of the device. If the SCSI host
3462 * implements ->unlock_native_capacity() method, it's invoked to
3463 * give it a chance to adjust the device capacity.
3466 * Defined by block layer. Might sleep.
3468 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3470 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3472 if (sdev
->host
->hostt
->unlock_native_capacity
)
3473 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3477 * sd_format_disk_name - format disk name
3478 * @prefix: name prefix - ie. "sd" for SCSI disks
3479 * @index: index of the disk to format name for
3480 * @buf: output buffer
3481 * @buflen: length of the output buffer
3483 * SCSI disk names starts at sda. The 26th device is sdz and the
3484 * 27th is sdaa. The last one for two lettered suffix is sdzz
3485 * which is followed by sdaaa.
3487 * This is basically 26 base counting with one extra 'nil' entry
3488 * at the beginning from the second digit on and can be
3489 * determined using similar method as 26 base conversion with the
3490 * index shifted -1 after each digit is computed.
3496 * 0 on success, -errno on failure.
3498 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3500 const int base
= 'z' - 'a' + 1;
3501 char *begin
= buf
+ strlen(prefix
);
3502 char *end
= buf
+ buflen
;
3512 *--p
= 'a' + (index
% unit
);
3513 index
= (index
/ unit
) - 1;
3514 } while (index
>= 0);
3516 memmove(begin
, p
, end
- p
);
3517 memcpy(buf
, prefix
, strlen(prefix
));
3523 * sd_probe - called during driver initialization and whenever a
3524 * new scsi device is attached to the system. It is called once
3525 * for each scsi device (not just disks) present.
3526 * @dev: pointer to device object
3528 * Returns 0 if successful (or not interested in this scsi device
3529 * (e.g. scanner)); 1 when there is an error.
3531 * Note: this function is invoked from the scsi mid-level.
3532 * This function sets up the mapping between a given
3533 * <host,channel,id,lun> (found in sdp) and new device name
3534 * (e.g. /dev/sda). More precisely it is the block device major
3535 * and minor number that is chosen here.
3537 * Assume sd_probe is not re-entrant (for time being)
3538 * Also think about sd_probe() and sd_remove() running coincidentally.
3540 static int sd_probe(struct device
*dev
)
3542 struct scsi_device
*sdp
= to_scsi_device(dev
);
3543 struct scsi_disk
*sdkp
;
3548 scsi_autopm_get_device(sdp
);
3550 if (sdp
->type
!= TYPE_DISK
&&
3551 sdp
->type
!= TYPE_ZBC
&&
3552 sdp
->type
!= TYPE_MOD
&&
3553 sdp
->type
!= TYPE_RBC
)
3556 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED
) && sdp
->type
== TYPE_ZBC
) {
3557 sdev_printk(KERN_WARNING
, sdp
,
3558 "Unsupported ZBC host-managed device.\n");
3562 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3566 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3570 gd
= blk_mq_alloc_disk_for_queue(sdp
->request_queue
,
3571 &sd_bio_compl_lkclass
);
3575 index
= ida_alloc(&sd_index_ida
, GFP_KERNEL
);
3577 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3581 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3583 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3584 goto out_free_index
;
3589 sdkp
->index
= index
;
3590 sdkp
->max_retries
= SD_MAX_RETRIES
;
3591 atomic_set(&sdkp
->openers
, 0);
3592 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3594 if (!sdp
->request_queue
->rq_timeout
) {
3595 if (sdp
->type
!= TYPE_MOD
)
3596 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3598 blk_queue_rq_timeout(sdp
->request_queue
,
3602 device_initialize(&sdkp
->disk_dev
);
3603 sdkp
->disk_dev
.parent
= get_device(dev
);
3604 sdkp
->disk_dev
.class = &sd_disk_class
;
3605 dev_set_name(&sdkp
->disk_dev
, "%s", dev_name(dev
));
3607 error
= device_add(&sdkp
->disk_dev
);
3609 put_device(&sdkp
->disk_dev
);
3613 dev_set_drvdata(dev
, sdkp
);
3615 gd
->major
= sd_major((index
& 0xf0) >> 4);
3616 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3617 gd
->minors
= SD_MINORS
;
3619 gd
->fops
= &sd_fops
;
3620 gd
->private_data
= sdkp
;
3622 /* defaults, until the device tells us otherwise */
3623 sdp
->sector_size
= 512;
3625 sdkp
->media_present
= 1;
3626 sdkp
->write_prot
= 0;
3627 sdkp
->cache_override
= 0;
3631 sdkp
->first_scan
= 1;
3632 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3634 sd_revalidate_disk(gd
);
3636 if (sdp
->removable
) {
3637 gd
->flags
|= GENHD_FL_REMOVABLE
;
3638 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3639 gd
->event_flags
= DISK_EVENT_FLAG_POLL
| DISK_EVENT_FLAG_UEVENT
;
3642 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3643 if (sdp
->rpm_autosuspend
) {
3644 pm_runtime_set_autosuspend_delay(dev
,
3645 sdp
->host
->hostt
->rpm_autosuspend_delay
);
3648 error
= device_add_disk(dev
, gd
, NULL
);
3650 put_device(&sdkp
->disk_dev
);
3655 if (sdkp
->security
) {
3656 sdkp
->opal_dev
= init_opal_dev(sdkp
, &sd_sec_submit
);
3658 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3661 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3662 sdp
->removable
? "removable " : "");
3663 scsi_autopm_put_device(sdp
);
3668 ida_free(&sd_index_ida
, index
);
3674 scsi_autopm_put_device(sdp
);
3679 * sd_remove - called whenever a scsi disk (previously recognized by
3680 * sd_probe) is detached from the system. It is called (potentially
3681 * multiple times) during sd module unload.
3682 * @dev: pointer to device object
3684 * Note: this function is invoked from the scsi mid-level.
3685 * This function potentially frees up a device name (e.g. /dev/sdc)
3686 * that could be re-used by a subsequent sd_probe().
3687 * This function is not called when the built-in sd driver is "exit-ed".
3689 static int sd_remove(struct device
*dev
)
3691 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3693 scsi_autopm_get_device(sdkp
->device
);
3695 device_del(&sdkp
->disk_dev
);
3696 del_gendisk(sdkp
->disk
);
3699 put_disk(sdkp
->disk
);
3703 static void scsi_disk_release(struct device
*dev
)
3705 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3707 ida_free(&sd_index_ida
, sdkp
->index
);
3708 sd_zbc_free_zone_info(sdkp
);
3709 put_device(&sdkp
->device
->sdev_gendev
);
3710 free_opal_dev(sdkp
->opal_dev
);
3715 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3717 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3718 struct scsi_sense_hdr sshdr
;
3719 const struct scsi_exec_args exec_args
= {
3721 .req_flags
= BLK_MQ_REQ_PM
,
3723 struct scsi_device
*sdp
= sdkp
->device
;
3727 cmd
[4] |= 1; /* START */
3729 if (sdp
->start_stop_pwr_cond
)
3730 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3732 if (!scsi_device_online(sdp
))
3735 res
= scsi_execute_cmd(sdp
, cmd
, REQ_OP_DRV_IN
, NULL
, 0, SD_TIMEOUT
,
3736 sdkp
->max_retries
, &exec_args
);
3738 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3739 if (res
> 0 && scsi_sense_valid(&sshdr
)) {
3740 sd_print_sense_hdr(sdkp
, &sshdr
);
3741 /* 0x3a is medium not present */
3742 if (sshdr
.asc
== 0x3a)
3747 /* SCSI error codes must not go to the generic layer */
3755 * Send a SYNCHRONIZE CACHE instruction down to the device through
3756 * the normal SCSI command structure. Wait for the command to
3759 static void sd_shutdown(struct device
*dev
)
3761 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3764 return; /* this can happen */
3766 if (pm_runtime_suspended(dev
))
3769 if (sdkp
->WCE
&& sdkp
->media_present
) {
3770 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3771 sd_sync_cache(sdkp
, NULL
);
3774 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3775 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3776 sd_start_stop_device(sdkp
, 0);
3780 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3782 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3783 struct scsi_sense_hdr sshdr
;
3786 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3789 if (sdkp
->WCE
&& sdkp
->media_present
) {
3790 if (!sdkp
->device
->silence_suspend
)
3791 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3792 ret
= sd_sync_cache(sdkp
, &sshdr
);
3795 /* ignore OFFLINE device */
3799 if (!scsi_sense_valid(&sshdr
) ||
3800 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3804 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3805 * doesn't support sync. There's not much to do and
3806 * suspend shouldn't fail.
3812 if (sdkp
->device
->manage_start_stop
) {
3813 if (!sdkp
->device
->silence_suspend
)
3814 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3815 /* an error is not worth aborting a system sleep */
3816 ret
= sd_start_stop_device(sdkp
, 0);
3817 if (ignore_stop_errors
)
3824 static int sd_suspend_system(struct device
*dev
)
3826 if (pm_runtime_suspended(dev
))
3829 return sd_suspend_common(dev
, true);
3832 static int sd_suspend_runtime(struct device
*dev
)
3834 return sd_suspend_common(dev
, false);
3837 static int sd_resume(struct device
*dev
)
3839 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3842 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3845 if (!sdkp
->device
->manage_start_stop
)
3848 if (!sdkp
->device
->no_start_on_resume
) {
3849 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3850 ret
= sd_start_stop_device(sdkp
, 1);
3854 opal_unlock_from_suspend(sdkp
->opal_dev
);
3858 static int sd_resume_system(struct device
*dev
)
3860 if (pm_runtime_suspended(dev
))
3863 return sd_resume(dev
);
3866 static int sd_resume_runtime(struct device
*dev
)
3868 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3869 struct scsi_device
*sdp
;
3871 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3876 if (sdp
->ignore_media_change
) {
3877 /* clear the device's sense data */
3878 static const u8 cmd
[10] = { REQUEST_SENSE
};
3879 const struct scsi_exec_args exec_args
= {
3880 .req_flags
= BLK_MQ_REQ_PM
,
3883 if (scsi_execute_cmd(sdp
, cmd
, REQ_OP_DRV_IN
, NULL
, 0,
3884 sdp
->request_queue
->rq_timeout
, 1,
3886 sd_printk(KERN_NOTICE
, sdkp
,
3887 "Failed to clear sense data\n");
3890 return sd_resume(dev
);
3893 static const struct dev_pm_ops sd_pm_ops
= {
3894 .suspend
= sd_suspend_system
,
3895 .resume
= sd_resume_system
,
3896 .poweroff
= sd_suspend_system
,
3897 .restore
= sd_resume_system
,
3898 .runtime_suspend
= sd_suspend_runtime
,
3899 .runtime_resume
= sd_resume_runtime
,
3902 static struct scsi_driver sd_template
= {
3905 .owner
= THIS_MODULE
,
3907 .probe_type
= PROBE_PREFER_ASYNCHRONOUS
,
3908 .remove
= sd_remove
,
3909 .shutdown
= sd_shutdown
,
3912 .rescan
= sd_rescan
,
3913 .init_command
= sd_init_command
,
3914 .uninit_command
= sd_uninit_command
,
3916 .eh_action
= sd_eh_action
,
3917 .eh_reset
= sd_eh_reset
,
3921 * init_sd - entry point for this driver (both when built in or when
3924 * Note: this function registers this driver with the scsi mid-level.
3926 static int __init
init_sd(void)
3928 int majors
= 0, i
, err
;
3930 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3932 for (i
= 0; i
< SD_MAJORS
; i
++) {
3933 if (__register_blkdev(sd_major(i
), "sd", sd_default_probe
))
3941 err
= class_register(&sd_disk_class
);
3945 sd_page_pool
= mempool_create_page_pool(SD_MEMPOOL_SIZE
, 0);
3946 if (!sd_page_pool
) {
3947 printk(KERN_ERR
"sd: can't init discard page pool\n");
3952 err
= scsi_register_driver(&sd_template
.gendrv
);
3954 goto err_out_driver
;
3959 mempool_destroy(sd_page_pool
);
3961 class_unregister(&sd_disk_class
);
3963 for (i
= 0; i
< SD_MAJORS
; i
++)
3964 unregister_blkdev(sd_major(i
), "sd");
3969 * exit_sd - exit point for this driver (when it is a module).
3971 * Note: this function unregisters this driver from the scsi mid-level.
3973 static void __exit
exit_sd(void)
3977 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3979 scsi_unregister_driver(&sd_template
.gendrv
);
3980 mempool_destroy(sd_page_pool
);
3982 class_unregister(&sd_disk_class
);
3984 for (i
= 0; i
< SD_MAJORS
; i
++)
3985 unregister_blkdev(sd_major(i
), "sd");
3988 module_init(init_sd
);
3989 module_exit(exit_sd
);
3991 void sd_print_sense_hdr(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
3993 scsi_print_sense_hdr(sdkp
->device
,
3994 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3997 void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
, int result
)
3999 const char *hb_string
= scsi_hostbyte_string(result
);
4002 sd_printk(KERN_INFO
, sdkp
,
4003 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
4004 hb_string
? hb_string
: "invalid",
4007 sd_printk(KERN_INFO
, sdkp
,
4008 "%s: Result: hostbyte=0x%02x driverbyte=%s\n",
4009 msg
, host_byte(result
), "DRIVER_OK");