1 // SPDX-License-Identifier: GPL-2.0-only
3 * sd.c Copyright (C) 1992 Drew Eckhardt
4 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
6 * Linux scsi disk driver
7 * Initial versions: Drew Eckhardt
8 * Subsequent revisions: Eric Youngdale
9 * Modification history:
10 * - Drew Eckhardt <drew@colorado.edu> original
11 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
12 * outstanding request, and other enhancements.
13 * Support loadable low-level scsi drivers.
14 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
15 * eight major numbers.
16 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
17 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
18 * sd_init and cleanups.
19 * - Alex Davis <letmein@erols.com> Fix problem where partition info
20 * not being read in sd_open. Fix problem where removable media
21 * could be ejected after sd_open.
22 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
23 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
24 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
25 * Support 32k/1M disks.
27 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
28 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
29 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
30 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
31 * - entering other commands: SCSI_LOG_HLQUEUE level 3
32 * Note: when the logging level is set by the user, it must be greater
33 * than the level indicated above to trigger output.
36 #include <linux/module.h>
38 #include <linux/kernel.h>
40 #include <linux/bio.h>
41 #include <linux/genhd.h>
42 #include <linux/hdreg.h>
43 #include <linux/errno.h>
44 #include <linux/idr.h>
45 #include <linux/interrupt.h>
46 #include <linux/init.h>
47 #include <linux/blkdev.h>
48 #include <linux/blkpg.h>
49 #include <linux/blk-pm.h>
50 #include <linux/delay.h>
51 #include <linux/mutex.h>
52 #include <linux/string_helpers.h>
53 #include <linux/async.h>
54 #include <linux/slab.h>
55 #include <linux/sed-opal.h>
56 #include <linux/pm_runtime.h>
58 #include <linux/t10-pi.h>
59 #include <linux/uaccess.h>
60 #include <asm/unaligned.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_dbg.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_driver.h>
67 #include <scsi/scsi_eh.h>
68 #include <scsi/scsi_host.h>
69 #include <scsi/scsi_ioctl.h>
70 #include <scsi/scsicam.h>
73 #include "scsi_priv.h"
74 #include "scsi_logging.h"
76 MODULE_AUTHOR("Eric Youngdale");
77 MODULE_DESCRIPTION("SCSI disk (sd) driver");
78 MODULE_LICENSE("GPL");
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
94 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
95 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
98 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
99 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
103 static void sd_config_discard(struct scsi_disk
*, unsigned int);
104 static void sd_config_write_same(struct scsi_disk
*);
105 static int sd_revalidate_disk(struct gendisk
*);
106 static void sd_unlock_native_capacity(struct gendisk
*disk
);
107 static int sd_probe(struct device
*);
108 static int sd_remove(struct device
*);
109 static void sd_shutdown(struct device
*);
110 static int sd_suspend_system(struct device
*);
111 static int sd_suspend_runtime(struct device
*);
112 static int sd_resume(struct device
*);
113 static void sd_rescan(struct device
*);
114 static blk_status_t
sd_init_command(struct scsi_cmnd
*SCpnt
);
115 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
116 static int sd_done(struct scsi_cmnd
*);
117 static void sd_eh_reset(struct scsi_cmnd
*);
118 static int sd_eh_action(struct scsi_cmnd
*, int);
119 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
120 static void scsi_disk_release(struct device
*cdev
);
122 static DEFINE_IDA(sd_index_ida
);
124 /* This semaphore is used to mediate the 0->1 reference get in the
125 * face of object destruction (i.e. we can't allow a get on an
126 * object after last put) */
127 static DEFINE_MUTEX(sd_ref_mutex
);
129 static struct kmem_cache
*sd_cdb_cache
;
130 static mempool_t
*sd_cdb_pool
;
131 static mempool_t
*sd_page_pool
;
132 static struct lock_class_key sd_bio_compl_lkclass
;
134 static const char *sd_cache_types
[] = {
135 "write through", "none", "write back",
136 "write back, no read (daft)"
139 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
141 bool wc
= false, fua
= false;
149 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
153 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
154 const char *buf
, size_t count
)
156 int ct
, rcd
, wce
, sp
;
157 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
158 struct scsi_device
*sdp
= sdkp
->device
;
161 struct scsi_mode_data data
;
162 struct scsi_sense_hdr sshdr
;
163 static const char temp
[] = "temporary ";
166 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
167 /* no cache control on RBC devices; theoretically they
168 * can do it, but there's probably so many exceptions
169 * it's not worth the risk */
172 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
173 buf
+= sizeof(temp
) - 1;
174 sdkp
->cache_override
= 1;
176 sdkp
->cache_override
= 0;
179 ct
= sysfs_match_string(sd_cache_types
, buf
);
183 rcd
= ct
& 0x01 ? 1 : 0;
184 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
186 if (sdkp
->cache_override
) {
189 sd_set_flush_flag(sdkp
);
193 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
194 sdkp
->max_retries
, &data
, NULL
))
196 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
197 data
.block_descriptor_length
);
198 buffer_data
= buffer
+ data
.header_length
+
199 data
.block_descriptor_length
;
200 buffer_data
[2] &= ~0x05;
201 buffer_data
[2] |= wce
<< 2 | rcd
;
202 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
203 buffer_data
[0] &= ~0x80;
206 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
207 * received mode parameter buffer before doing MODE SELECT.
209 data
.device_specific
= 0;
211 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
212 sdkp
->max_retries
, &data
, &sshdr
)) {
213 if (scsi_sense_valid(&sshdr
))
214 sd_print_sense_hdr(sdkp
, &sshdr
);
217 sd_revalidate_disk(sdkp
->disk
);
222 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
225 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
226 struct scsi_device
*sdp
= sdkp
->device
;
228 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
232 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
233 const char *buf
, size_t count
)
235 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
236 struct scsi_device
*sdp
= sdkp
->device
;
239 if (!capable(CAP_SYS_ADMIN
))
242 if (kstrtobool(buf
, &v
))
245 sdp
->manage_start_stop
= v
;
249 static DEVICE_ATTR_RW(manage_start_stop
);
252 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
254 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
256 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
260 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
261 const char *buf
, size_t count
)
264 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
265 struct scsi_device
*sdp
= sdkp
->device
;
267 if (!capable(CAP_SYS_ADMIN
))
270 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
273 if (kstrtobool(buf
, &v
))
276 sdp
->allow_restart
= v
;
280 static DEVICE_ATTR_RW(allow_restart
);
283 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
285 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
286 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
288 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
290 static DEVICE_ATTR_RW(cache_type
);
293 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
295 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
297 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
299 static DEVICE_ATTR_RO(FUA
);
302 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
305 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
307 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
311 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
312 const char *buf
, size_t count
)
314 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
318 if (!capable(CAP_SYS_ADMIN
))
321 err
= kstrtouint(buf
, 10, &val
);
326 if (val
<= T10_PI_TYPE3_PROTECTION
)
327 sdkp
->protection_type
= val
;
331 static DEVICE_ATTR_RW(protection_type
);
334 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
337 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
338 struct scsi_device
*sdp
= sdkp
->device
;
339 unsigned int dif
, dix
;
341 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
342 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
344 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
350 return sprintf(buf
, "none\n");
352 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
354 static DEVICE_ATTR_RO(protection_mode
);
357 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
359 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
361 return sprintf(buf
, "%u\n", sdkp
->ATO
);
363 static DEVICE_ATTR_RO(app_tag_own
);
366 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
369 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
371 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
373 static DEVICE_ATTR_RO(thin_provisioning
);
375 /* sysfs_match_string() requires dense arrays */
376 static const char *lbp_mode
[] = {
377 [SD_LBP_FULL
] = "full",
378 [SD_LBP_UNMAP
] = "unmap",
379 [SD_LBP_WS16
] = "writesame_16",
380 [SD_LBP_WS10
] = "writesame_10",
381 [SD_LBP_ZERO
] = "writesame_zero",
382 [SD_LBP_DISABLE
] = "disabled",
386 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
389 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
391 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
395 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
396 const char *buf
, size_t count
)
398 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
399 struct scsi_device
*sdp
= sdkp
->device
;
402 if (!capable(CAP_SYS_ADMIN
))
405 if (sd_is_zoned(sdkp
)) {
406 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
410 if (sdp
->type
!= TYPE_DISK
)
413 mode
= sysfs_match_string(lbp_mode
, buf
);
417 sd_config_discard(sdkp
, mode
);
421 static DEVICE_ATTR_RW(provisioning_mode
);
423 /* sysfs_match_string() requires dense arrays */
424 static const char *zeroing_mode
[] = {
425 [SD_ZERO_WRITE
] = "write",
426 [SD_ZERO_WS
] = "writesame",
427 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
428 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
432 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
435 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
437 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
441 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
442 const char *buf
, size_t count
)
444 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
447 if (!capable(CAP_SYS_ADMIN
))
450 mode
= sysfs_match_string(zeroing_mode
, buf
);
454 sdkp
->zeroing_mode
= mode
;
458 static DEVICE_ATTR_RW(zeroing_mode
);
461 max_medium_access_timeouts_show(struct device
*dev
,
462 struct device_attribute
*attr
, char *buf
)
464 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
466 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
470 max_medium_access_timeouts_store(struct device
*dev
,
471 struct device_attribute
*attr
, const char *buf
,
474 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
477 if (!capable(CAP_SYS_ADMIN
))
480 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
482 return err
? err
: count
;
484 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
487 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
490 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
492 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
496 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
497 const char *buf
, size_t count
)
499 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
500 struct scsi_device
*sdp
= sdkp
->device
;
504 if (!capable(CAP_SYS_ADMIN
))
507 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
510 err
= kstrtoul(buf
, 10, &max
);
516 sdp
->no_write_same
= 1;
517 else if (max
<= SD_MAX_WS16_BLOCKS
) {
518 sdp
->no_write_same
= 0;
519 sdkp
->max_ws_blocks
= max
;
522 sd_config_write_same(sdkp
);
526 static DEVICE_ATTR_RW(max_write_same_blocks
);
529 zoned_cap_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
531 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
533 if (sdkp
->device
->type
== TYPE_ZBC
)
534 return sprintf(buf
, "host-managed\n");
535 if (sdkp
->zoned
== 1)
536 return sprintf(buf
, "host-aware\n");
537 if (sdkp
->zoned
== 2)
538 return sprintf(buf
, "drive-managed\n");
539 return sprintf(buf
, "none\n");
541 static DEVICE_ATTR_RO(zoned_cap
);
544 max_retries_store(struct device
*dev
, struct device_attribute
*attr
,
545 const char *buf
, size_t count
)
547 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
548 struct scsi_device
*sdev
= sdkp
->device
;
551 err
= kstrtoint(buf
, 10, &retries
);
555 if (retries
== SCSI_CMD_RETRIES_NO_LIMIT
|| retries
<= SD_MAX_RETRIES
) {
556 sdkp
->max_retries
= retries
;
560 sdev_printk(KERN_ERR
, sdev
, "max_retries must be between -1 and %d\n",
566 max_retries_show(struct device
*dev
, struct device_attribute
*attr
,
569 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
571 return sprintf(buf
, "%d\n", sdkp
->max_retries
);
574 static DEVICE_ATTR_RW(max_retries
);
576 static struct attribute
*sd_disk_attrs
[] = {
577 &dev_attr_cache_type
.attr
,
579 &dev_attr_allow_restart
.attr
,
580 &dev_attr_manage_start_stop
.attr
,
581 &dev_attr_protection_type
.attr
,
582 &dev_attr_protection_mode
.attr
,
583 &dev_attr_app_tag_own
.attr
,
584 &dev_attr_thin_provisioning
.attr
,
585 &dev_attr_provisioning_mode
.attr
,
586 &dev_attr_zeroing_mode
.attr
,
587 &dev_attr_max_write_same_blocks
.attr
,
588 &dev_attr_max_medium_access_timeouts
.attr
,
589 &dev_attr_zoned_cap
.attr
,
590 &dev_attr_max_retries
.attr
,
593 ATTRIBUTE_GROUPS(sd_disk
);
595 static struct class sd_disk_class
= {
597 .owner
= THIS_MODULE
,
598 .dev_release
= scsi_disk_release
,
599 .dev_groups
= sd_disk_groups
,
602 static const struct dev_pm_ops sd_pm_ops
= {
603 .suspend
= sd_suspend_system
,
605 .poweroff
= sd_suspend_system
,
606 .restore
= sd_resume
,
607 .runtime_suspend
= sd_suspend_runtime
,
608 .runtime_resume
= sd_resume
,
611 static struct scsi_driver sd_template
= {
614 .owner
= THIS_MODULE
,
616 .probe_type
= PROBE_PREFER_ASYNCHRONOUS
,
618 .shutdown
= sd_shutdown
,
622 .init_command
= sd_init_command
,
623 .uninit_command
= sd_uninit_command
,
625 .eh_action
= sd_eh_action
,
626 .eh_reset
= sd_eh_reset
,
630 * Don't request a new module, as that could deadlock in multipath
633 static void sd_default_probe(dev_t devt
)
638 * Device no to disk mapping:
640 * major disc2 disc p1
641 * |............|.............|....|....| <- dev_t
644 * Inside a major, we have 16k disks, however mapped non-
645 * contiguously. The first 16 disks are for major0, the next
646 * ones with major1, ... Disk 256 is for major0 again, disk 272
648 * As we stay compatible with our numbering scheme, we can reuse
649 * the well-know SCSI majors 8, 65--71, 136--143.
651 static int sd_major(int major_idx
)
655 return SCSI_DISK0_MAJOR
;
657 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
659 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
662 return 0; /* shut up gcc */
666 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
668 struct scsi_disk
*sdkp
= NULL
;
670 mutex_lock(&sd_ref_mutex
);
672 if (disk
->private_data
) {
673 sdkp
= scsi_disk(disk
);
674 if (scsi_device_get(sdkp
->device
) == 0)
675 get_device(&sdkp
->dev
);
679 mutex_unlock(&sd_ref_mutex
);
683 static void scsi_disk_put(struct scsi_disk
*sdkp
)
685 struct scsi_device
*sdev
= sdkp
->device
;
687 mutex_lock(&sd_ref_mutex
);
688 put_device(&sdkp
->dev
);
689 scsi_device_put(sdev
);
690 mutex_unlock(&sd_ref_mutex
);
693 #ifdef CONFIG_BLK_SED_OPAL
694 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
695 size_t len
, bool send
)
697 struct scsi_disk
*sdkp
= data
;
698 struct scsi_device
*sdev
= sdkp
->device
;
702 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
704 put_unaligned_be16(spsp
, &cdb
[2]);
705 put_unaligned_be32(len
, &cdb
[6]);
707 ret
= scsi_execute(sdev
, cdb
, send
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
,
708 buffer
, len
, NULL
, NULL
, SD_TIMEOUT
, sdkp
->max_retries
, 0,
710 return ret
<= 0 ? ret
: -EIO
;
712 #endif /* CONFIG_BLK_SED_OPAL */
715 * Look up the DIX operation based on whether the command is read or
716 * write and whether dix and dif are enabled.
718 static unsigned int sd_prot_op(bool write
, bool dix
, bool dif
)
720 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
721 static const unsigned int ops
[] = { /* wrt dix dif */
722 SCSI_PROT_NORMAL
, /* 0 0 0 */
723 SCSI_PROT_READ_STRIP
, /* 0 0 1 */
724 SCSI_PROT_READ_INSERT
, /* 0 1 0 */
725 SCSI_PROT_READ_PASS
, /* 0 1 1 */
726 SCSI_PROT_NORMAL
, /* 1 0 0 */
727 SCSI_PROT_WRITE_INSERT
, /* 1 0 1 */
728 SCSI_PROT_WRITE_STRIP
, /* 1 1 0 */
729 SCSI_PROT_WRITE_PASS
, /* 1 1 1 */
732 return ops
[write
<< 2 | dix
<< 1 | dif
];
736 * Returns a mask of the protection flags that are valid for a given DIX
739 static unsigned int sd_prot_flag_mask(unsigned int prot_op
)
741 static const unsigned int flag_mask
[] = {
742 [SCSI_PROT_NORMAL
] = 0,
744 [SCSI_PROT_READ_STRIP
] = SCSI_PROT_TRANSFER_PI
|
745 SCSI_PROT_GUARD_CHECK
|
746 SCSI_PROT_REF_CHECK
|
747 SCSI_PROT_REF_INCREMENT
,
749 [SCSI_PROT_READ_INSERT
] = SCSI_PROT_REF_INCREMENT
|
750 SCSI_PROT_IP_CHECKSUM
,
752 [SCSI_PROT_READ_PASS
] = SCSI_PROT_TRANSFER_PI
|
753 SCSI_PROT_GUARD_CHECK
|
754 SCSI_PROT_REF_CHECK
|
755 SCSI_PROT_REF_INCREMENT
|
756 SCSI_PROT_IP_CHECKSUM
,
758 [SCSI_PROT_WRITE_INSERT
] = SCSI_PROT_TRANSFER_PI
|
759 SCSI_PROT_REF_INCREMENT
,
761 [SCSI_PROT_WRITE_STRIP
] = SCSI_PROT_GUARD_CHECK
|
762 SCSI_PROT_REF_CHECK
|
763 SCSI_PROT_REF_INCREMENT
|
764 SCSI_PROT_IP_CHECKSUM
,
766 [SCSI_PROT_WRITE_PASS
] = SCSI_PROT_TRANSFER_PI
|
767 SCSI_PROT_GUARD_CHECK
|
768 SCSI_PROT_REF_CHECK
|
769 SCSI_PROT_REF_INCREMENT
|
770 SCSI_PROT_IP_CHECKSUM
,
773 return flag_mask
[prot_op
];
776 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
777 unsigned int dix
, unsigned int dif
)
779 struct bio
*bio
= scmd
->request
->bio
;
780 unsigned int prot_op
= sd_prot_op(rq_data_dir(scmd
->request
), dix
, dif
);
781 unsigned int protect
= 0;
783 if (dix
) { /* DIX Type 0, 1, 2, 3 */
784 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
785 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
787 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
788 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
791 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
792 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
794 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
795 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
798 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
799 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
801 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
802 protect
= 3 << 5; /* Disable target PI checking */
804 protect
= 1 << 5; /* Enable target PI checking */
807 scsi_set_prot_op(scmd
, prot_op
);
808 scsi_set_prot_type(scmd
, dif
);
809 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
814 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
816 struct request_queue
*q
= sdkp
->disk
->queue
;
817 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
818 unsigned int max_blocks
= 0;
820 q
->limits
.discard_alignment
=
821 sdkp
->unmap_alignment
* logical_block_size
;
822 q
->limits
.discard_granularity
=
823 max(sdkp
->physical_block_size
,
824 sdkp
->unmap_granularity
* logical_block_size
);
825 sdkp
->provisioning_mode
= mode
;
831 blk_queue_max_discard_sectors(q
, 0);
832 blk_queue_flag_clear(QUEUE_FLAG_DISCARD
, q
);
836 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
837 (u32
)SD_MAX_WS16_BLOCKS
);
841 if (sdkp
->device
->unmap_limit_for_ws
)
842 max_blocks
= sdkp
->max_unmap_blocks
;
844 max_blocks
= sdkp
->max_ws_blocks
;
846 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
850 if (sdkp
->device
->unmap_limit_for_ws
)
851 max_blocks
= sdkp
->max_unmap_blocks
;
853 max_blocks
= sdkp
->max_ws_blocks
;
855 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
859 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
860 (u32
)SD_MAX_WS10_BLOCKS
);
864 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
865 blk_queue_flag_set(QUEUE_FLAG_DISCARD
, q
);
868 static blk_status_t
sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
870 struct scsi_device
*sdp
= cmd
->device
;
871 struct request
*rq
= cmd
->request
;
872 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_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 unsigned int data_len
= 24;
878 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
879 if (!rq
->special_vec
.bv_page
)
880 return BLK_STS_RESOURCE
;
881 clear_highpage(rq
->special_vec
.bv_page
);
882 rq
->special_vec
.bv_offset
= 0;
883 rq
->special_vec
.bv_len
= data_len
;
884 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
887 cmd
->cmnd
[0] = UNMAP
;
890 buf
= bvec_virt(&rq
->special_vec
);
891 put_unaligned_be16(6 + 16, &buf
[0]);
892 put_unaligned_be16(16, &buf
[2]);
893 put_unaligned_be64(lba
, &buf
[8]);
894 put_unaligned_be32(nr_blocks
, &buf
[16]);
896 cmd
->allowed
= sdkp
->max_retries
;
897 cmd
->transfersize
= data_len
;
898 rq
->timeout
= SD_TIMEOUT
;
900 return scsi_alloc_sgtables(cmd
);
903 static blk_status_t
sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
,
906 struct scsi_device
*sdp
= cmd
->device
;
907 struct request
*rq
= cmd
->request
;
908 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
909 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
910 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
911 u32 data_len
= sdp
->sector_size
;
913 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
914 if (!rq
->special_vec
.bv_page
)
915 return BLK_STS_RESOURCE
;
916 clear_highpage(rq
->special_vec
.bv_page
);
917 rq
->special_vec
.bv_offset
= 0;
918 rq
->special_vec
.bv_len
= data_len
;
919 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
922 cmd
->cmnd
[0] = WRITE_SAME_16
;
924 cmd
->cmnd
[1] = 0x8; /* UNMAP */
925 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
926 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
928 cmd
->allowed
= sdkp
->max_retries
;
929 cmd
->transfersize
= data_len
;
930 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
932 return scsi_alloc_sgtables(cmd
);
935 static blk_status_t
sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
,
938 struct scsi_device
*sdp
= cmd
->device
;
939 struct request
*rq
= cmd
->request
;
940 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
941 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
942 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
943 u32 data_len
= sdp
->sector_size
;
945 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
946 if (!rq
->special_vec
.bv_page
)
947 return BLK_STS_RESOURCE
;
948 clear_highpage(rq
->special_vec
.bv_page
);
949 rq
->special_vec
.bv_offset
= 0;
950 rq
->special_vec
.bv_len
= data_len
;
951 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
954 cmd
->cmnd
[0] = WRITE_SAME
;
956 cmd
->cmnd
[1] = 0x8; /* UNMAP */
957 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
958 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
960 cmd
->allowed
= sdkp
->max_retries
;
961 cmd
->transfersize
= data_len
;
962 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
964 return scsi_alloc_sgtables(cmd
);
967 static blk_status_t
sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
969 struct request
*rq
= cmd
->request
;
970 struct scsi_device
*sdp
= cmd
->device
;
971 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
972 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
973 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
975 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
976 switch (sdkp
->zeroing_mode
) {
977 case SD_ZERO_WS16_UNMAP
:
978 return sd_setup_write_same16_cmnd(cmd
, true);
979 case SD_ZERO_WS10_UNMAP
:
980 return sd_setup_write_same10_cmnd(cmd
, true);
984 if (sdp
->no_write_same
) {
985 rq
->rq_flags
|= RQF_QUIET
;
986 return BLK_STS_TARGET
;
989 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff)
990 return sd_setup_write_same16_cmnd(cmd
, false);
992 return sd_setup_write_same10_cmnd(cmd
, false);
995 static void sd_config_write_same(struct scsi_disk
*sdkp
)
997 struct request_queue
*q
= sdkp
->disk
->queue
;
998 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
1000 if (sdkp
->device
->no_write_same
) {
1001 sdkp
->max_ws_blocks
= 0;
1005 /* Some devices can not handle block counts above 0xffff despite
1006 * supporting WRITE SAME(16). Consequently we default to 64k
1007 * blocks per I/O unless the device explicitly advertises a
1010 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
1011 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
1012 (u32
)SD_MAX_WS16_BLOCKS
);
1013 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
1014 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
1015 (u32
)SD_MAX_WS10_BLOCKS
);
1017 sdkp
->device
->no_write_same
= 1;
1018 sdkp
->max_ws_blocks
= 0;
1021 if (sdkp
->lbprz
&& sdkp
->lbpws
)
1022 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
1023 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
1024 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
1025 else if (sdkp
->max_ws_blocks
)
1026 sdkp
->zeroing_mode
= SD_ZERO_WS
;
1028 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
1030 if (sdkp
->max_ws_blocks
&&
1031 sdkp
->physical_block_size
> logical_block_size
) {
1033 * Reporting a maximum number of blocks that is not aligned
1034 * on the device physical size would cause a large write same
1035 * request to be split into physically unaligned chunks by
1036 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
1037 * even if the caller of these functions took care to align the
1038 * large request. So make sure the maximum reported is aligned
1039 * to the device physical block size. This is only an optional
1040 * optimization for regular disks, but this is mandatory to
1041 * avoid failure of large write same requests directed at
1042 * sequential write required zones of host-managed ZBC disks.
1044 sdkp
->max_ws_blocks
=
1045 round_down(sdkp
->max_ws_blocks
,
1046 bytes_to_logical(sdkp
->device
,
1047 sdkp
->physical_block_size
));
1051 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
1052 (logical_block_size
>> 9));
1053 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
1054 (logical_block_size
>> 9));
1058 * sd_setup_write_same_cmnd - write the same data to multiple blocks
1059 * @cmd: command to prepare
1061 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
1062 * the preference indicated by the target device.
1064 static blk_status_t
sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
1066 struct request
*rq
= cmd
->request
;
1067 struct scsi_device
*sdp
= cmd
->device
;
1068 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1069 struct bio
*bio
= rq
->bio
;
1070 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1071 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1074 if (sdkp
->device
->no_write_same
)
1075 return BLK_STS_TARGET
;
1077 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
1079 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
1081 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff) {
1083 cmd
->cmnd
[0] = WRITE_SAME_16
;
1084 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1085 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1088 cmd
->cmnd
[0] = WRITE_SAME
;
1089 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1090 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1093 cmd
->transfersize
= sdp
->sector_size
;
1094 cmd
->allowed
= sdkp
->max_retries
;
1097 * For WRITE SAME the data transferred via the DATA OUT buffer is
1098 * different from the amount of data actually written to the target.
1100 * We set up __data_len to the amount of data transferred via the
1101 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1102 * to transfer a single sector of data first, but then reset it to
1103 * the amount of data to be written right after so that the I/O path
1104 * knows how much to actually write.
1106 rq
->__data_len
= sdp
->sector_size
;
1107 ret
= scsi_alloc_sgtables(cmd
);
1108 rq
->__data_len
= blk_rq_bytes(rq
);
1113 static blk_status_t
sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
1115 struct request
*rq
= cmd
->request
;
1116 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1118 /* flush requests don't perform I/O, zero the S/G table */
1119 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
1121 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
1123 cmd
->transfersize
= 0;
1124 cmd
->allowed
= sdkp
->max_retries
;
1126 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1130 static blk_status_t
sd_setup_rw32_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1131 sector_t lba
, unsigned int nr_blocks
,
1132 unsigned char flags
)
1134 cmd
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1135 if (unlikely(cmd
->cmnd
== NULL
))
1136 return BLK_STS_RESOURCE
;
1138 cmd
->cmd_len
= SD_EXT_CDB_SIZE
;
1139 memset(cmd
->cmnd
, 0, cmd
->cmd_len
);
1141 cmd
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1142 cmd
->cmnd
[7] = 0x18; /* Additional CDB len */
1143 cmd
->cmnd
[9] = write
? WRITE_32
: READ_32
;
1144 cmd
->cmnd
[10] = flags
;
1145 put_unaligned_be64(lba
, &cmd
->cmnd
[12]);
1146 put_unaligned_be32(lba
, &cmd
->cmnd
[20]); /* Expected Indirect LBA */
1147 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[28]);
1152 static blk_status_t
sd_setup_rw16_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1153 sector_t lba
, unsigned int nr_blocks
,
1154 unsigned char flags
)
1157 cmd
->cmnd
[0] = write
? WRITE_16
: READ_16
;
1158 cmd
->cmnd
[1] = flags
;
1161 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1162 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1167 static blk_status_t
sd_setup_rw10_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1168 sector_t lba
, unsigned int nr_blocks
,
1169 unsigned char flags
)
1172 cmd
->cmnd
[0] = write
? WRITE_10
: READ_10
;
1173 cmd
->cmnd
[1] = flags
;
1176 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1177 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1182 static blk_status_t
sd_setup_rw6_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1183 sector_t lba
, unsigned int nr_blocks
,
1184 unsigned char flags
)
1186 /* Avoid that 0 blocks gets translated into 256 blocks. */
1187 if (WARN_ON_ONCE(nr_blocks
== 0))
1188 return BLK_STS_IOERR
;
1190 if (unlikely(flags
& 0x8)) {
1192 * This happens only if this drive failed 10byte rw
1193 * command with ILLEGAL_REQUEST during operation and
1194 * thus turned off use_10_for_rw.
1196 scmd_printk(KERN_ERR
, cmd
, "FUA write on READ/WRITE(6) drive\n");
1197 return BLK_STS_IOERR
;
1201 cmd
->cmnd
[0] = write
? WRITE_6
: READ_6
;
1202 cmd
->cmnd
[1] = (lba
>> 16) & 0x1f;
1203 cmd
->cmnd
[2] = (lba
>> 8) & 0xff;
1204 cmd
->cmnd
[3] = lba
& 0xff;
1205 cmd
->cmnd
[4] = nr_blocks
;
1211 static blk_status_t
sd_setup_read_write_cmnd(struct scsi_cmnd
*cmd
)
1213 struct request
*rq
= cmd
->request
;
1214 struct scsi_device
*sdp
= cmd
->device
;
1215 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1216 sector_t lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1218 unsigned int nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1219 unsigned int mask
= logical_to_sectors(sdp
, 1) - 1;
1220 bool write
= rq_data_dir(rq
) == WRITE
;
1221 unsigned char protect
, fua
;
1226 ret
= scsi_alloc_sgtables(cmd
);
1227 if (ret
!= BLK_STS_OK
)
1230 ret
= BLK_STS_IOERR
;
1231 if (!scsi_device_online(sdp
) || sdp
->changed
) {
1232 scmd_printk(KERN_ERR
, cmd
, "device offline or changed\n");
1236 if (blk_rq_pos(rq
) + blk_rq_sectors(rq
) > get_capacity(rq
->rq_disk
)) {
1237 scmd_printk(KERN_ERR
, cmd
, "access beyond end of device\n");
1241 if ((blk_rq_pos(rq
) & mask
) || (blk_rq_sectors(rq
) & mask
)) {
1242 scmd_printk(KERN_ERR
, cmd
, "request not aligned to the logical block size\n");
1247 * Some SD card readers can't handle accesses which touch the
1248 * last one or two logical blocks. Split accesses as needed.
1250 threshold
= sdkp
->capacity
- SD_LAST_BUGGY_SECTORS
;
1252 if (unlikely(sdp
->last_sector_bug
&& lba
+ nr_blocks
> threshold
)) {
1253 if (lba
< threshold
) {
1254 /* Access up to the threshold but not beyond */
1255 nr_blocks
= threshold
- lba
;
1257 /* Access only a single logical block */
1262 if (req_op(rq
) == REQ_OP_ZONE_APPEND
) {
1263 ret
= sd_zbc_prepare_zone_append(cmd
, &lba
, nr_blocks
);
1268 fua
= rq
->cmd_flags
& REQ_FUA
? 0x8 : 0;
1269 dix
= scsi_prot_sg_count(cmd
);
1270 dif
= scsi_host_dif_capable(cmd
->device
->host
, sdkp
->protection_type
);
1273 protect
= sd_setup_protect_cmnd(cmd
, dix
, dif
);
1277 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1278 ret
= sd_setup_rw32_cmnd(cmd
, write
, lba
, nr_blocks
,
1280 } else if (sdp
->use_16_for_rw
|| (nr_blocks
> 0xffff)) {
1281 ret
= sd_setup_rw16_cmnd(cmd
, write
, lba
, nr_blocks
,
1283 } else if ((nr_blocks
> 0xff) || (lba
> 0x1fffff) ||
1284 sdp
->use_10_for_rw
|| protect
) {
1285 ret
= sd_setup_rw10_cmnd(cmd
, write
, lba
, nr_blocks
,
1288 ret
= sd_setup_rw6_cmnd(cmd
, write
, lba
, nr_blocks
,
1292 if (unlikely(ret
!= BLK_STS_OK
))
1296 * We shouldn't disconnect in the middle of a sector, so with a dumb
1297 * host adapter, it's safe to assume that we can at least transfer
1298 * this many bytes between each connect / disconnect.
1300 cmd
->transfersize
= sdp
->sector_size
;
1301 cmd
->underflow
= nr_blocks
<< 9;
1302 cmd
->allowed
= sdkp
->max_retries
;
1303 cmd
->sdb
.length
= nr_blocks
* sdp
->sector_size
;
1306 scmd_printk(KERN_INFO
, cmd
,
1307 "%s: block=%llu, count=%d\n", __func__
,
1308 (unsigned long long)blk_rq_pos(rq
),
1309 blk_rq_sectors(rq
)));
1311 scmd_printk(KERN_INFO
, cmd
,
1312 "%s %d/%u 512 byte blocks.\n",
1313 write
? "writing" : "reading", nr_blocks
,
1314 blk_rq_sectors(rq
)));
1317 * This indicates that the command is ready from our end to be queued.
1321 scsi_free_sgtables(cmd
);
1325 static blk_status_t
sd_init_command(struct scsi_cmnd
*cmd
)
1327 struct request
*rq
= cmd
->request
;
1329 switch (req_op(rq
)) {
1330 case REQ_OP_DISCARD
:
1331 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1333 return sd_setup_unmap_cmnd(cmd
);
1335 return sd_setup_write_same16_cmnd(cmd
, true);
1337 return sd_setup_write_same10_cmnd(cmd
, true);
1339 return sd_setup_write_same10_cmnd(cmd
, false);
1341 return BLK_STS_TARGET
;
1343 case REQ_OP_WRITE_ZEROES
:
1344 return sd_setup_write_zeroes_cmnd(cmd
);
1345 case REQ_OP_WRITE_SAME
:
1346 return sd_setup_write_same_cmnd(cmd
);
1348 return sd_setup_flush_cmnd(cmd
);
1351 case REQ_OP_ZONE_APPEND
:
1352 return sd_setup_read_write_cmnd(cmd
);
1353 case REQ_OP_ZONE_RESET
:
1354 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1356 case REQ_OP_ZONE_RESET_ALL
:
1357 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1359 case REQ_OP_ZONE_OPEN
:
1360 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_OPEN_ZONE
, false);
1361 case REQ_OP_ZONE_CLOSE
:
1362 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_CLOSE_ZONE
, false);
1363 case REQ_OP_ZONE_FINISH
:
1364 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_FINISH_ZONE
, false);
1367 return BLK_STS_NOTSUPP
;
1371 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1373 struct request
*rq
= SCpnt
->request
;
1376 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1377 mempool_free(rq
->special_vec
.bv_page
, sd_page_pool
);
1379 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1383 mempool_free(cmnd
, sd_cdb_pool
);
1387 static bool sd_need_revalidate(struct block_device
*bdev
,
1388 struct scsi_disk
*sdkp
)
1390 if (sdkp
->device
->removable
|| sdkp
->write_prot
) {
1391 if (bdev_check_media_change(bdev
))
1396 * Force a full rescan after ioctl(BLKRRPART). While the disk state has
1397 * nothing to do with partitions, BLKRRPART is used to force a full
1398 * revalidate after things like a format for historical reasons.
1400 return test_bit(GD_NEED_PART_SCAN
, &bdev
->bd_disk
->state
);
1404 * sd_open - open a scsi disk device
1405 * @bdev: Block device of the scsi disk to open
1406 * @mode: FMODE_* mask
1408 * Returns 0 if successful. Returns a negated errno value in case
1411 * Note: This can be called from a user context (e.g. fsck(1) )
1412 * or from within the kernel (e.g. as a result of a mount(1) ).
1413 * In the latter case @inode and @filp carry an abridged amount
1414 * of information as noted above.
1416 * Locking: called with bdev->bd_disk->open_mutex held.
1418 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1420 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1421 struct scsi_device
*sdev
;
1427 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1429 sdev
= sdkp
->device
;
1432 * If the device is in error recovery, wait until it is done.
1433 * If the device is offline, then disallow any access to it.
1436 if (!scsi_block_when_processing_errors(sdev
))
1439 if (sd_need_revalidate(bdev
, sdkp
))
1440 sd_revalidate_disk(bdev
->bd_disk
);
1443 * If the drive is empty, just let the open fail.
1445 retval
= -ENOMEDIUM
;
1446 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1450 * If the device has the write protect tab set, have the open fail
1451 * if the user expects to be able to write to the thing.
1454 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1458 * It is possible that the disk changing stuff resulted in
1459 * the device being taken offline. If this is the case,
1460 * report this to the user, and don't pretend that the
1461 * open actually succeeded.
1464 if (!scsi_device_online(sdev
))
1467 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1468 if (scsi_block_when_processing_errors(sdev
))
1469 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1475 scsi_disk_put(sdkp
);
1480 * sd_release - invoked when the (last) close(2) is called on this
1482 * @disk: disk to release
1483 * @mode: FMODE_* mask
1487 * Note: may block (uninterruptible) if error recovery is underway
1490 * Locking: called with bdev->bd_disk->open_mutex held.
1492 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1494 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1495 struct scsi_device
*sdev
= sdkp
->device
;
1497 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1499 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1500 if (scsi_block_when_processing_errors(sdev
))
1501 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1504 scsi_disk_put(sdkp
);
1507 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1509 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1510 struct scsi_device
*sdp
= sdkp
->device
;
1511 struct Scsi_Host
*host
= sdp
->host
;
1512 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1515 /* default to most commonly used values */
1516 diskinfo
[0] = 0x40; /* 1 << 6 */
1517 diskinfo
[1] = 0x20; /* 1 << 5 */
1518 diskinfo
[2] = capacity
>> 11;
1520 /* override with calculated, extended default, or driver values */
1521 if (host
->hostt
->bios_param
)
1522 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1524 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1526 geo
->heads
= diskinfo
[0];
1527 geo
->sectors
= diskinfo
[1];
1528 geo
->cylinders
= diskinfo
[2];
1533 * sd_ioctl_common - process an ioctl
1534 * @bdev: target block device
1535 * @mode: FMODE_* mask
1536 * @cmd: ioctl command number
1537 * @p: this is third argument given to ioctl(2) system call.
1538 * Often contains a pointer.
1540 * Returns 0 if successful (some ioctls return positive numbers on
1541 * success as well). Returns a negated errno value in case of error.
1543 * Note: most ioctls are forward onto the block subsystem or further
1544 * down in the scsi subsystem.
1546 static int sd_ioctl_common(struct block_device
*bdev
, fmode_t mode
,
1547 unsigned int cmd
, void __user
*p
)
1549 struct gendisk
*disk
= bdev
->bd_disk
;
1550 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1551 struct scsi_device
*sdp
= sdkp
->device
;
1554 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1555 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1557 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1562 * If we are in the middle of error recovery, don't let anyone
1563 * else try and use this device. Also, if error recovery fails, it
1564 * may try and take the device offline, in which case all further
1565 * access to the device is prohibited.
1567 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1568 (mode
& FMODE_NDELAY
) != 0);
1572 if (is_sed_ioctl(cmd
))
1573 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1576 * Send SCSI addressing ioctls directly to mid level, send other
1577 * ioctls to block level and then onto mid level if they can't be
1581 case SCSI_IOCTL_GET_IDLUN
:
1582 case SCSI_IOCTL_GET_BUS_NUMBER
:
1583 error
= scsi_ioctl(sdp
, cmd
, p
);
1586 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1593 static void set_media_not_present(struct scsi_disk
*sdkp
)
1595 if (sdkp
->media_present
)
1596 sdkp
->device
->changed
= 1;
1598 if (sdkp
->device
->removable
) {
1599 sdkp
->media_present
= 0;
1604 static int media_not_present(struct scsi_disk
*sdkp
,
1605 struct scsi_sense_hdr
*sshdr
)
1607 if (!scsi_sense_valid(sshdr
))
1610 /* not invoked for commands that could return deferred errors */
1611 switch (sshdr
->sense_key
) {
1612 case UNIT_ATTENTION
:
1614 /* medium not present */
1615 if (sshdr
->asc
== 0x3A) {
1616 set_media_not_present(sdkp
);
1624 * sd_check_events - check media events
1625 * @disk: kernel device descriptor
1626 * @clearing: disk events currently being cleared
1628 * Returns mask of DISK_EVENT_*.
1630 * Note: this function is invoked from the block subsystem.
1632 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1634 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1635 struct scsi_device
*sdp
;
1643 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1646 * If the device is offline, don't send any commands - just pretend as
1647 * if the command failed. If the device ever comes back online, we
1648 * can deal with it then. It is only because of unrecoverable errors
1649 * that we would ever take a device offline in the first place.
1651 if (!scsi_device_online(sdp
)) {
1652 set_media_not_present(sdkp
);
1657 * Using TEST_UNIT_READY enables differentiation between drive with
1658 * no cartridge loaded - NOT READY, drive with changed cartridge -
1659 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1661 * Drives that auto spin down. eg iomega jaz 1G, will be started
1662 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1663 * sd_revalidate() is called.
1665 if (scsi_block_when_processing_errors(sdp
)) {
1666 struct scsi_sense_hdr sshdr
= { 0, };
1668 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, sdkp
->max_retries
,
1671 /* failed to execute TUR, assume media not present */
1672 if (retval
< 0 || host_byte(retval
)) {
1673 set_media_not_present(sdkp
);
1677 if (media_not_present(sdkp
, &sshdr
))
1682 * For removable scsi disk we have to recognise the presence
1683 * of a disk in the drive.
1685 if (!sdkp
->media_present
)
1687 sdkp
->media_present
= 1;
1690 * sdp->changed is set under the following conditions:
1692 * Medium present state has changed in either direction.
1693 * Device has indicated UNIT_ATTENTION.
1695 disk_changed
= sdp
->changed
;
1697 scsi_disk_put(sdkp
);
1698 return disk_changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1701 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1704 struct scsi_device
*sdp
= sdkp
->device
;
1705 const int timeout
= sdp
->request_queue
->rq_timeout
1706 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1707 struct scsi_sense_hdr my_sshdr
;
1709 if (!scsi_device_online(sdp
))
1712 /* caller might not be interested in sense, but we need it */
1716 for (retries
= 3; retries
> 0; --retries
) {
1717 unsigned char cmd
[10] = { 0 };
1719 cmd
[0] = SYNCHRONIZE_CACHE
;
1721 * Leave the rest of the command zero to indicate
1724 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1725 timeout
, sdkp
->max_retries
, 0, RQF_PM
, NULL
);
1731 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1736 if (scsi_status_is_check_condition(res
) &&
1737 scsi_sense_valid(sshdr
)) {
1738 sd_print_sense_hdr(sdkp
, sshdr
);
1740 /* we need to evaluate the error return */
1741 if (sshdr
->asc
== 0x3a || /* medium not present */
1742 sshdr
->asc
== 0x20 || /* invalid command */
1743 (sshdr
->asc
== 0x74 && sshdr
->ascq
== 0x71)) /* drive is password locked */
1744 /* this is no error here */
1748 switch (host_byte(res
)) {
1749 /* ignore errors due to racing a disconnection */
1750 case DID_BAD_TARGET
:
1751 case DID_NO_CONNECT
:
1753 /* signal the upper layer it might try again */
1757 case DID_SOFT_ERROR
:
1766 static void sd_rescan(struct device
*dev
)
1768 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1770 sd_revalidate_disk(sdkp
->disk
);
1773 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1774 unsigned int cmd
, unsigned long arg
)
1776 void __user
*p
= (void __user
*)arg
;
1779 ret
= sd_ioctl_common(bdev
, mode
, cmd
, p
);
1783 return scsi_ioctl(scsi_disk(bdev
->bd_disk
)->device
, cmd
, p
);
1786 #ifdef CONFIG_COMPAT
1787 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1788 unsigned int cmd
, unsigned long arg
)
1790 void __user
*p
= compat_ptr(arg
);
1793 ret
= sd_ioctl_common(bdev
, mode
, cmd
, p
);
1797 return scsi_compat_ioctl(scsi_disk(bdev
->bd_disk
)->device
, cmd
, p
);
1801 static char sd_pr_type(enum pr_type type
)
1804 case PR_WRITE_EXCLUSIVE
:
1806 case PR_EXCLUSIVE_ACCESS
:
1808 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1810 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1812 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1814 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1821 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1822 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1824 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1825 struct scsi_device
*sdev
= sdkp
->device
;
1826 struct scsi_sense_hdr sshdr
;
1828 u8 cmd
[16] = { 0, };
1829 u8 data
[24] = { 0, };
1831 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1834 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1836 put_unaligned_be64(key
, &data
[0]);
1837 put_unaligned_be64(sa_key
, &data
[8]);
1840 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1841 &sshdr
, SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
1843 if (scsi_status_is_check_condition(result
) &&
1844 scsi_sense_valid(&sshdr
)) {
1845 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1846 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1852 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1855 if (flags
& ~PR_FL_IGNORE_KEY
)
1857 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1858 old_key
, new_key
, 0,
1859 (1 << 0) /* APTPL */);
1862 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1867 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1870 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1872 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1875 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1876 enum pr_type type
, bool abort
)
1878 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1879 sd_pr_type(type
), 0);
1882 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1884 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1887 static const struct pr_ops sd_pr_ops
= {
1888 .pr_register
= sd_pr_register
,
1889 .pr_reserve
= sd_pr_reserve
,
1890 .pr_release
= sd_pr_release
,
1891 .pr_preempt
= sd_pr_preempt
,
1892 .pr_clear
= sd_pr_clear
,
1895 static const struct block_device_operations sd_fops
= {
1896 .owner
= THIS_MODULE
,
1898 .release
= sd_release
,
1900 .getgeo
= sd_getgeo
,
1901 #ifdef CONFIG_COMPAT
1902 .compat_ioctl
= sd_compat_ioctl
,
1904 .check_events
= sd_check_events
,
1905 .unlock_native_capacity
= sd_unlock_native_capacity
,
1906 .report_zones
= sd_zbc_report_zones
,
1907 .pr_ops
= &sd_pr_ops
,
1911 * sd_eh_reset - reset error handling callback
1912 * @scmd: sd-issued command that has failed
1914 * This function is called by the SCSI midlayer before starting
1915 * SCSI EH. When counting medium access failures we have to be
1916 * careful to register it only only once per device and SCSI EH run;
1917 * there might be several timed out commands which will cause the
1918 * 'max_medium_access_timeouts' counter to trigger after the first
1919 * SCSI EH run already and set the device to offline.
1920 * So this function resets the internal counter before starting SCSI EH.
1922 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1924 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1926 /* New SCSI EH run, reset gate variable */
1927 sdkp
->ignore_medium_access_errors
= false;
1931 * sd_eh_action - error handling callback
1932 * @scmd: sd-issued command that has failed
1933 * @eh_disp: The recovery disposition suggested by the midlayer
1935 * This function is called by the SCSI midlayer upon completion of an
1936 * error test command (currently TEST UNIT READY). The result of sending
1937 * the eh command is passed in eh_disp. We're looking for devices that
1938 * fail medium access commands but are OK with non access commands like
1939 * test unit ready (so wrongly see the device as having a successful
1942 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1944 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1945 struct scsi_device
*sdev
= scmd
->device
;
1947 if (!scsi_device_online(sdev
) ||
1948 !scsi_medium_access_command(scmd
) ||
1949 host_byte(scmd
->result
) != DID_TIME_OUT
||
1954 * The device has timed out executing a medium access command.
1955 * However, the TEST UNIT READY command sent during error
1956 * handling completed successfully. Either the device is in the
1957 * process of recovering or has it suffered an internal failure
1958 * that prevents access to the storage medium.
1960 if (!sdkp
->ignore_medium_access_errors
) {
1961 sdkp
->medium_access_timed_out
++;
1962 sdkp
->ignore_medium_access_errors
= true;
1966 * If the device keeps failing read/write commands but TEST UNIT
1967 * READY always completes successfully we assume that medium
1968 * access is no longer possible and take the device offline.
1970 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1971 scmd_printk(KERN_ERR
, scmd
,
1972 "Medium access timeout failure. Offlining disk!\n");
1973 mutex_lock(&sdev
->state_mutex
);
1974 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1975 mutex_unlock(&sdev
->state_mutex
);
1983 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1985 struct request
*req
= scmd
->request
;
1986 struct scsi_device
*sdev
= scmd
->device
;
1987 unsigned int transferred
, good_bytes
;
1988 u64 start_lba
, end_lba
, bad_lba
;
1991 * Some commands have a payload smaller than the device logical
1992 * block size (e.g. INQUIRY on a 4K disk).
1994 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1997 /* Check if we have a 'bad_lba' information */
1998 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1999 SCSI_SENSE_BUFFERSIZE
,
2004 * If the bad lba was reported incorrectly, we have no idea where
2007 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
2008 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
2009 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
2013 * resid is optional but mostly filled in. When it's unused,
2014 * its value is zero, so we assume the whole buffer transferred
2016 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
2018 /* This computation should always be done in terms of the
2019 * resolution of the device's medium.
2021 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
2023 return min(good_bytes
, transferred
);
2027 * sd_done - bottom half handler: called when the lower level
2028 * driver has completed (successfully or otherwise) a scsi command.
2029 * @SCpnt: mid-level's per command structure.
2031 * Note: potentially run from within an ISR. Must not block.
2033 static int sd_done(struct scsi_cmnd
*SCpnt
)
2035 int result
= SCpnt
->result
;
2036 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
2037 unsigned int sector_size
= SCpnt
->device
->sector_size
;
2039 struct scsi_sense_hdr sshdr
;
2040 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
2041 struct request
*req
= SCpnt
->request
;
2042 int sense_valid
= 0;
2043 int sense_deferred
= 0;
2045 switch (req_op(req
)) {
2046 case REQ_OP_DISCARD
:
2047 case REQ_OP_WRITE_ZEROES
:
2048 case REQ_OP_WRITE_SAME
:
2049 case REQ_OP_ZONE_RESET
:
2050 case REQ_OP_ZONE_RESET_ALL
:
2051 case REQ_OP_ZONE_OPEN
:
2052 case REQ_OP_ZONE_CLOSE
:
2053 case REQ_OP_ZONE_FINISH
:
2055 good_bytes
= blk_rq_bytes(req
);
2056 scsi_set_resid(SCpnt
, 0);
2059 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
2064 * In case of bogus fw or device, we could end up having
2065 * an unaligned partial completion. Check this here and force
2068 resid
= scsi_get_resid(SCpnt
);
2069 if (resid
& (sector_size
- 1)) {
2070 sd_printk(KERN_INFO
, sdkp
,
2071 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2072 resid
, sector_size
);
2073 scsi_print_command(SCpnt
);
2074 resid
= min(scsi_bufflen(SCpnt
),
2075 round_up(resid
, sector_size
));
2076 scsi_set_resid(SCpnt
, resid
);
2081 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
2083 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
2085 sdkp
->medium_access_timed_out
= 0;
2087 if (!scsi_status_is_check_condition(result
) &&
2088 (!sense_valid
|| sense_deferred
))
2091 switch (sshdr
.sense_key
) {
2092 case HARDWARE_ERROR
:
2094 good_bytes
= sd_completed_bytes(SCpnt
);
2096 case RECOVERED_ERROR
:
2097 good_bytes
= scsi_bufflen(SCpnt
);
2100 /* This indicates a false check condition, so ignore it. An
2101 * unknown amount of data was transferred so treat it as an
2105 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2107 case ABORTED_COMMAND
:
2108 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2109 good_bytes
= sd_completed_bytes(SCpnt
);
2111 case ILLEGAL_REQUEST
:
2112 switch (sshdr
.asc
) {
2113 case 0x10: /* DIX: Host detected corruption */
2114 good_bytes
= sd_completed_bytes(SCpnt
);
2116 case 0x20: /* INVALID COMMAND OPCODE */
2117 case 0x24: /* INVALID FIELD IN CDB */
2118 switch (SCpnt
->cmnd
[0]) {
2120 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2124 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2125 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2127 sdkp
->device
->no_write_same
= 1;
2128 sd_config_write_same(sdkp
);
2129 req
->rq_flags
|= RQF_QUIET
;
2140 if (sd_is_zoned(sdkp
))
2141 good_bytes
= sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2143 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2144 "sd_done: completed %d of %d bytes\n",
2145 good_bytes
, scsi_bufflen(SCpnt
)));
2151 * spinup disk - called only in sd_revalidate_disk()
2154 sd_spinup_disk(struct scsi_disk
*sdkp
)
2156 unsigned char cmd
[10];
2157 unsigned long spintime_expire
= 0;
2158 int retries
, spintime
;
2159 unsigned int the_result
;
2160 struct scsi_sense_hdr sshdr
;
2161 int sense_valid
= 0;
2165 /* Spin up drives, as required. Only do this at boot time */
2166 /* Spinup needs to be done for module loads too. */
2171 cmd
[0] = TEST_UNIT_READY
;
2172 memset((void *) &cmd
[1], 0, 9);
2174 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2177 sdkp
->max_retries
, NULL
);
2180 * If the drive has indicated to us that it
2181 * doesn't have any media in it, don't bother
2182 * with any more polling.
2184 if (media_not_present(sdkp
, &sshdr
))
2188 sense_valid
= scsi_sense_valid(&sshdr
);
2190 } while (retries
< 3 &&
2191 (!scsi_status_is_good(the_result
) ||
2192 (scsi_status_is_check_condition(the_result
) &&
2193 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2195 if (!scsi_status_is_check_condition(the_result
)) {
2196 /* no sense, TUR either succeeded or failed
2197 * with a status error */
2198 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2199 sd_print_result(sdkp
, "Test Unit Ready failed",
2206 * The device does not want the automatic start to be issued.
2208 if (sdkp
->device
->no_start_on_add
)
2211 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2212 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2213 break; /* manual intervention required */
2214 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2215 break; /* standby */
2216 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2217 break; /* unavailable */
2218 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2219 break; /* sanitize in progress */
2221 * Issue command to spin up drive when not ready
2224 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2225 cmd
[0] = START_STOP
;
2226 cmd
[1] = 1; /* Return immediately */
2227 memset((void *) &cmd
[2], 0, 8);
2228 cmd
[4] = 1; /* Start spin cycle */
2229 if (sdkp
->device
->start_stop_pwr_cond
)
2231 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2233 SD_TIMEOUT
, sdkp
->max_retries
,
2235 spintime_expire
= jiffies
+ 100 * HZ
;
2238 /* Wait 1 second for next try */
2240 printk(KERN_CONT
".");
2243 * Wait for USB flash devices with slow firmware.
2244 * Yes, this sense key/ASC combination shouldn't
2245 * occur here. It's characteristic of these devices.
2247 } else if (sense_valid
&&
2248 sshdr
.sense_key
== UNIT_ATTENTION
&&
2249 sshdr
.asc
== 0x28) {
2251 spintime_expire
= jiffies
+ 5 * HZ
;
2254 /* Wait 1 second for next try */
2257 /* we don't understand the sense code, so it's
2258 * probably pointless to loop */
2260 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2261 sd_print_sense_hdr(sdkp
, &sshdr
);
2266 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2269 if (scsi_status_is_good(the_result
))
2270 printk(KERN_CONT
"ready\n");
2272 printk(KERN_CONT
"not responding...\n");
2277 * Determine whether disk supports Data Integrity Field.
2279 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2281 struct scsi_device
*sdp
= sdkp
->device
;
2285 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0) {
2286 sdkp
->protection_type
= 0;
2290 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2292 if (type
> T10_PI_TYPE3_PROTECTION
)
2294 else if (scsi_host_dif_capable(sdp
->host
, type
))
2297 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2300 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2301 " protection type %u. Disabling disk!\n",
2305 sd_printk(KERN_NOTICE
, sdkp
,
2306 "Enabling DIF Type %u protection\n", type
);
2309 sd_printk(KERN_NOTICE
, sdkp
,
2310 "Disabling DIF Type %u protection\n", type
);
2314 sdkp
->protection_type
= type
;
2319 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2320 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2324 sd_print_sense_hdr(sdkp
, sshdr
);
2326 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2329 * Set dirty bit for removable devices if not ready -
2330 * sometimes drives will not report this properly.
2332 if (sdp
->removable
&&
2333 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2334 set_media_not_present(sdkp
);
2337 * We used to set media_present to 0 here to indicate no media
2338 * in the drive, but some drives fail read capacity even with
2339 * media present, so we can't do that.
2341 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2345 #if RC16_LEN > SD_BUF_SIZE
2346 #error RC16_LEN must not be more than SD_BUF_SIZE
2349 #define READ_CAPACITY_RETRIES_ON_RESET 10
2351 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2352 unsigned char *buffer
)
2354 unsigned char cmd
[16];
2355 struct scsi_sense_hdr sshdr
;
2356 int sense_valid
= 0;
2358 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2359 unsigned int alignment
;
2360 unsigned long long lba
;
2361 unsigned sector_size
;
2363 if (sdp
->no_read_capacity_16
)
2368 cmd
[0] = SERVICE_ACTION_IN_16
;
2369 cmd
[1] = SAI_READ_CAPACITY_16
;
2371 memset(buffer
, 0, RC16_LEN
);
2373 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2374 buffer
, RC16_LEN
, &sshdr
,
2375 SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
2377 if (media_not_present(sdkp
, &sshdr
))
2380 if (the_result
> 0) {
2381 sense_valid
= scsi_sense_valid(&sshdr
);
2383 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2384 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2386 /* Invalid Command Operation Code or
2387 * Invalid Field in CDB, just retry
2388 * silently with RC10 */
2391 sshdr
.sense_key
== UNIT_ATTENTION
&&
2392 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2393 /* Device reset might occur several times,
2394 * give it one more chance */
2395 if (--reset_retries
> 0)
2400 } while (the_result
&& retries
);
2403 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2404 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2408 sector_size
= get_unaligned_be32(&buffer
[8]);
2409 lba
= get_unaligned_be64(&buffer
[0]);
2411 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2416 /* Logical blocks per physical block exponent */
2417 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2420 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2422 /* Lowest aligned logical block */
2423 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2424 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2425 if (alignment
&& sdkp
->first_scan
)
2426 sd_printk(KERN_NOTICE
, sdkp
,
2427 "physical block alignment offset: %u\n", alignment
);
2429 if (buffer
[14] & 0x80) { /* LBPME */
2432 if (buffer
[14] & 0x40) /* LBPRZ */
2435 sd_config_discard(sdkp
, SD_LBP_WS16
);
2438 sdkp
->capacity
= lba
+ 1;
2442 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2443 unsigned char *buffer
)
2445 unsigned char cmd
[16];
2446 struct scsi_sense_hdr sshdr
;
2447 int sense_valid
= 0;
2449 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2451 unsigned sector_size
;
2454 cmd
[0] = READ_CAPACITY
;
2455 memset(&cmd
[1], 0, 9);
2456 memset(buffer
, 0, 8);
2458 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2460 SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
2462 if (media_not_present(sdkp
, &sshdr
))
2465 if (the_result
> 0) {
2466 sense_valid
= scsi_sense_valid(&sshdr
);
2468 sshdr
.sense_key
== UNIT_ATTENTION
&&
2469 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2470 /* Device reset might occur several times,
2471 * give it one more chance */
2472 if (--reset_retries
> 0)
2477 } while (the_result
&& retries
);
2480 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2481 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2485 sector_size
= get_unaligned_be32(&buffer
[4]);
2486 lba
= get_unaligned_be32(&buffer
[0]);
2488 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2489 /* Some buggy (usb cardreader) devices return an lba of
2490 0xffffffff when the want to report a size of 0 (with
2491 which they really mean no media is present) */
2493 sdkp
->physical_block_size
= sector_size
;
2497 sdkp
->capacity
= lba
+ 1;
2498 sdkp
->physical_block_size
= sector_size
;
2502 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2504 if (sdp
->host
->max_cmd_len
< 16)
2506 if (sdp
->try_rc_10_first
)
2508 if (sdp
->scsi_level
> SCSI_SPC_2
)
2510 if (scsi_device_protection(sdp
))
2516 * read disk capacity
2519 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2522 struct scsi_device
*sdp
= sdkp
->device
;
2524 if (sd_try_rc16_first(sdp
)) {
2525 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2526 if (sector_size
== -EOVERFLOW
)
2528 if (sector_size
== -ENODEV
)
2530 if (sector_size
< 0)
2531 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2532 if (sector_size
< 0)
2535 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2536 if (sector_size
== -EOVERFLOW
)
2538 if (sector_size
< 0)
2540 if ((sizeof(sdkp
->capacity
) > 4) &&
2541 (sdkp
->capacity
> 0xffffffffULL
)) {
2542 int old_sector_size
= sector_size
;
2543 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2544 "Trying to use READ CAPACITY(16).\n");
2545 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2546 if (sector_size
< 0) {
2547 sd_printk(KERN_NOTICE
, sdkp
,
2548 "Using 0xffffffff as device size\n");
2549 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2550 sector_size
= old_sector_size
;
2553 /* Remember that READ CAPACITY(16) succeeded */
2554 sdp
->try_rc_10_first
= 0;
2558 /* Some devices are known to return the total number of blocks,
2559 * not the highest block number. Some devices have versions
2560 * which do this and others which do not. Some devices we might
2561 * suspect of doing this but we don't know for certain.
2563 * If we know the reported capacity is wrong, decrement it. If
2564 * we can only guess, then assume the number of blocks is even
2565 * (usually true but not always) and err on the side of lowering
2568 if (sdp
->fix_capacity
||
2569 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2570 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2571 "from its reported value: %llu\n",
2572 (unsigned long long) sdkp
->capacity
);
2577 if (sector_size
== 0) {
2579 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2583 if (sector_size
!= 512 &&
2584 sector_size
!= 1024 &&
2585 sector_size
!= 2048 &&
2586 sector_size
!= 4096) {
2587 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2590 * The user might want to re-format the drive with
2591 * a supported sectorsize. Once this happens, it
2592 * would be relatively trivial to set the thing up.
2593 * For this reason, we leave the thing in the table.
2597 * set a bogus sector size so the normal read/write
2598 * logic in the block layer will eventually refuse any
2599 * request on this device without tripping over power
2600 * of two sector size assumptions
2604 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2605 blk_queue_physical_block_size(sdp
->request_queue
,
2606 sdkp
->physical_block_size
);
2607 sdkp
->device
->sector_size
= sector_size
;
2609 if (sdkp
->capacity
> 0xffffffff)
2610 sdp
->use_16_for_rw
= 1;
2615 * Print disk capacity
2618 sd_print_capacity(struct scsi_disk
*sdkp
,
2619 sector_t old_capacity
)
2621 int sector_size
= sdkp
->device
->sector_size
;
2622 char cap_str_2
[10], cap_str_10
[10];
2624 if (!sdkp
->first_scan
&& old_capacity
== sdkp
->capacity
)
2627 string_get_size(sdkp
->capacity
, sector_size
,
2628 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2629 string_get_size(sdkp
->capacity
, sector_size
,
2630 STRING_UNITS_10
, cap_str_10
, sizeof(cap_str_10
));
2632 sd_printk(KERN_NOTICE
, sdkp
,
2633 "%llu %d-byte logical blocks: (%s/%s)\n",
2634 (unsigned long long)sdkp
->capacity
,
2635 sector_size
, cap_str_10
, cap_str_2
);
2637 if (sdkp
->physical_block_size
!= sector_size
)
2638 sd_printk(KERN_NOTICE
, sdkp
,
2639 "%u-byte physical blocks\n",
2640 sdkp
->physical_block_size
);
2643 /* called with buffer of length 512 */
2645 sd_do_mode_sense(struct scsi_disk
*sdkp
, int dbd
, int modepage
,
2646 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2647 struct scsi_sense_hdr
*sshdr
)
2649 return scsi_mode_sense(sdkp
->device
, dbd
, modepage
, buffer
, len
,
2650 SD_TIMEOUT
, sdkp
->max_retries
, data
,
2655 * read write protect setting, if possible - called only in sd_revalidate_disk()
2656 * called with buffer of length SD_BUF_SIZE
2659 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2662 struct scsi_device
*sdp
= sdkp
->device
;
2663 struct scsi_mode_data data
;
2664 int old_wp
= sdkp
->write_prot
;
2666 set_disk_ro(sdkp
->disk
, 0);
2667 if (sdp
->skip_ms_page_3f
) {
2668 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2672 if (sdp
->use_192_bytes_for_3f
) {
2673 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2676 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2677 * We have to start carefully: some devices hang if we ask
2678 * for more than is available.
2680 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2683 * Second attempt: ask for page 0 When only page 0 is
2684 * implemented, a request for page 3F may return Sense Key
2685 * 5: Illegal Request, Sense Code 24: Invalid field in
2689 res
= sd_do_mode_sense(sdkp
, 0, 0, buffer
, 4, &data
, NULL
);
2692 * Third attempt: ask 255 bytes, as we did earlier.
2695 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 255,
2700 sd_first_printk(KERN_WARNING
, sdkp
,
2701 "Test WP failed, assume Write Enabled\n");
2703 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2704 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2705 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2706 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2707 sdkp
->write_prot
? "on" : "off");
2708 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2714 * sd_read_cache_type - called only from sd_revalidate_disk()
2715 * called with buffer of length SD_BUF_SIZE
2718 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2721 struct scsi_device
*sdp
= sdkp
->device
;
2726 struct scsi_mode_data data
;
2727 struct scsi_sense_hdr sshdr
;
2728 int old_wce
= sdkp
->WCE
;
2729 int old_rcd
= sdkp
->RCD
;
2730 int old_dpofua
= sdkp
->DPOFUA
;
2733 if (sdkp
->cache_override
)
2737 if (sdp
->skip_ms_page_8
) {
2738 if (sdp
->type
== TYPE_RBC
)
2741 if (sdp
->skip_ms_page_3f
)
2744 if (sdp
->use_192_bytes_for_3f
)
2748 } else if (sdp
->type
== TYPE_RBC
) {
2756 /* cautiously ask */
2757 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, first_len
,
2763 if (!data
.header_length
) {
2766 sd_first_printk(KERN_ERR
, sdkp
,
2767 "Missing header in MODE_SENSE response\n");
2770 /* that went OK, now ask for the proper length */
2774 * We're only interested in the first three bytes, actually.
2775 * But the data cache page is defined for the first 20.
2779 else if (len
> SD_BUF_SIZE
) {
2780 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2781 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2784 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2788 if (len
> first_len
)
2789 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, len
,
2793 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2795 while (offset
< len
) {
2796 u8 page_code
= buffer
[offset
] & 0x3F;
2797 u8 spf
= buffer
[offset
] & 0x40;
2799 if (page_code
== 8 || page_code
== 6) {
2800 /* We're interested only in the first 3 bytes.
2802 if (len
- offset
<= 2) {
2803 sd_first_printk(KERN_ERR
, sdkp
,
2804 "Incomplete mode parameter "
2808 modepage
= page_code
;
2812 /* Go to the next page */
2813 if (spf
&& len
- offset
> 3)
2814 offset
+= 4 + (buffer
[offset
+2] << 8) +
2816 else if (!spf
&& len
- offset
> 1)
2817 offset
+= 2 + buffer
[offset
+1];
2819 sd_first_printk(KERN_ERR
, sdkp
,
2821 "parameter data\n");
2827 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2831 if (modepage
== 8) {
2832 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2833 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2835 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2839 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2840 if (sdp
->broken_fua
) {
2841 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2843 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2844 !sdkp
->device
->use_16_for_rw
) {
2845 sd_first_printk(KERN_NOTICE
, sdkp
,
2846 "Uses READ/WRITE(6), disabling FUA\n");
2850 /* No cache flush allowed for write protected devices */
2851 if (sdkp
->WCE
&& sdkp
->write_prot
)
2854 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2855 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2856 sd_printk(KERN_NOTICE
, sdkp
,
2857 "Write cache: %s, read cache: %s, %s\n",
2858 sdkp
->WCE
? "enabled" : "disabled",
2859 sdkp
->RCD
? "disabled" : "enabled",
2860 sdkp
->DPOFUA
? "supports DPO and FUA"
2861 : "doesn't support DPO or FUA");
2867 if (scsi_sense_valid(&sshdr
) &&
2868 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2869 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2870 /* Invalid field in CDB */
2871 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2873 sd_first_printk(KERN_ERR
, sdkp
,
2874 "Asking for cache data failed\n");
2877 if (sdp
->wce_default_on
) {
2878 sd_first_printk(KERN_NOTICE
, sdkp
,
2879 "Assuming drive cache: write back\n");
2882 sd_first_printk(KERN_ERR
, sdkp
,
2883 "Assuming drive cache: write through\n");
2891 * The ATO bit indicates whether the DIF application tag is available
2892 * for use by the operating system.
2894 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2897 struct scsi_device
*sdp
= sdkp
->device
;
2898 struct scsi_mode_data data
;
2899 struct scsi_sense_hdr sshdr
;
2901 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2904 if (sdkp
->protection_type
== 0)
2907 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2908 sdkp
->max_retries
, &data
, &sshdr
);
2910 if (res
< 0 || !data
.header_length
||
2912 sd_first_printk(KERN_WARNING
, sdkp
,
2913 "getting Control mode page failed, assume no ATO\n");
2915 if (scsi_sense_valid(&sshdr
))
2916 sd_print_sense_hdr(sdkp
, &sshdr
);
2921 offset
= data
.header_length
+ data
.block_descriptor_length
;
2923 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2924 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2928 if ((buffer
[offset
+ 5] & 0x80) == 0)
2937 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2938 * @sdkp: disk to query
2940 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2942 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2943 const int vpd_len
= 64;
2944 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2947 /* Block Limits VPD */
2948 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2951 blk_queue_io_min(sdkp
->disk
->queue
,
2952 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2954 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2955 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2957 if (buffer
[3] == 0x3c) {
2958 unsigned int lba_count
, desc_count
;
2960 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2965 lba_count
= get_unaligned_be32(&buffer
[20]);
2966 desc_count
= get_unaligned_be32(&buffer
[24]);
2968 if (lba_count
&& desc_count
)
2969 sdkp
->max_unmap_blocks
= lba_count
;
2971 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2973 if (buffer
[32] & 0x80)
2974 sdkp
->unmap_alignment
=
2975 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2977 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2979 if (sdkp
->max_unmap_blocks
)
2980 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2982 sd_config_discard(sdkp
, SD_LBP_WS16
);
2984 } else { /* LBP VPD page tells us what to use */
2985 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2986 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2987 else if (sdkp
->lbpws
)
2988 sd_config_discard(sdkp
, SD_LBP_WS16
);
2989 else if (sdkp
->lbpws10
)
2990 sd_config_discard(sdkp
, SD_LBP_WS10
);
2992 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
3001 * sd_read_block_characteristics - Query block dev. characteristics
3002 * @sdkp: disk to query
3004 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
3006 struct request_queue
*q
= sdkp
->disk
->queue
;
3007 unsigned char *buffer
;
3009 const int vpd_len
= 64;
3011 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
3014 /* Block Device Characteristics VPD */
3015 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
3018 rot
= get_unaligned_be16(&buffer
[4]);
3021 blk_queue_flag_set(QUEUE_FLAG_NONROT
, q
);
3022 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM
, q
);
3025 if (sdkp
->device
->type
== TYPE_ZBC
) {
3027 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_HM
);
3029 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
3030 if (sdkp
->zoned
== 1) {
3032 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_HA
);
3034 /* Regular disk or drive managed disk */
3035 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_NONE
);
3039 if (!sdkp
->first_scan
)
3042 if (blk_queue_is_zoned(q
)) {
3043 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
3044 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
3046 if (sdkp
->zoned
== 1)
3047 sd_printk(KERN_NOTICE
, sdkp
,
3048 "Host-aware SMR disk used as regular disk\n");
3049 else if (sdkp
->zoned
== 2)
3050 sd_printk(KERN_NOTICE
, sdkp
,
3051 "Drive-managed SMR disk\n");
3059 * sd_read_block_provisioning - Query provisioning VPD page
3060 * @sdkp: disk to query
3062 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
3064 unsigned char *buffer
;
3065 const int vpd_len
= 8;
3067 if (sdkp
->lbpme
== 0)
3070 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
3072 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
3076 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
3077 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3078 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3084 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3086 struct scsi_device
*sdev
= sdkp
->device
;
3088 if (sdev
->host
->no_write_same
) {
3089 sdev
->no_write_same
= 1;
3094 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3095 /* too large values might cause issues with arcmsr */
3096 int vpd_buf_len
= 64;
3098 sdev
->no_report_opcodes
= 1;
3100 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3101 * CODES is unsupported and the device has an ATA
3102 * Information VPD page (SAT).
3104 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3105 sdev
->no_write_same
= 1;
3108 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3111 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3115 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3117 struct scsi_device
*sdev
= sdkp
->device
;
3119 if (!sdev
->security_supported
)
3122 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3123 SECURITY_PROTOCOL_IN
) == 1 &&
3124 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3125 SECURITY_PROTOCOL_OUT
) == 1)
3130 * Determine the device's preferred I/O size for reads and writes
3131 * unless the reported value is unreasonably small, large, not a
3132 * multiple of the physical block size, or simply garbage.
3134 static bool sd_validate_opt_xfer_size(struct scsi_disk
*sdkp
,
3135 unsigned int dev_max
)
3137 struct scsi_device
*sdp
= sdkp
->device
;
3138 unsigned int opt_xfer_bytes
=
3139 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3141 if (sdkp
->opt_xfer_blocks
== 0)
3144 if (sdkp
->opt_xfer_blocks
> dev_max
) {
3145 sd_first_printk(KERN_WARNING
, sdkp
,
3146 "Optimal transfer size %u logical blocks " \
3147 "> dev_max (%u logical blocks)\n",
3148 sdkp
->opt_xfer_blocks
, dev_max
);
3152 if (sdkp
->opt_xfer_blocks
> SD_DEF_XFER_BLOCKS
) {
3153 sd_first_printk(KERN_WARNING
, sdkp
,
3154 "Optimal transfer size %u logical blocks " \
3155 "> sd driver limit (%u logical blocks)\n",
3156 sdkp
->opt_xfer_blocks
, SD_DEF_XFER_BLOCKS
);
3160 if (opt_xfer_bytes
< PAGE_SIZE
) {
3161 sd_first_printk(KERN_WARNING
, sdkp
,
3162 "Optimal transfer size %u bytes < " \
3163 "PAGE_SIZE (%u bytes)\n",
3164 opt_xfer_bytes
, (unsigned int)PAGE_SIZE
);
3168 if (opt_xfer_bytes
& (sdkp
->physical_block_size
- 1)) {
3169 sd_first_printk(KERN_WARNING
, sdkp
,
3170 "Optimal transfer size %u bytes not a " \
3171 "multiple of physical block size (%u bytes)\n",
3172 opt_xfer_bytes
, sdkp
->physical_block_size
);
3176 sd_first_printk(KERN_INFO
, sdkp
, "Optimal transfer size %u bytes\n",
3182 * sd_revalidate_disk - called the first time a new disk is seen,
3183 * performs disk spin up, read_capacity, etc.
3184 * @disk: struct gendisk we care about
3186 static int sd_revalidate_disk(struct gendisk
*disk
)
3188 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3189 struct scsi_device
*sdp
= sdkp
->device
;
3190 struct request_queue
*q
= sdkp
->disk
->queue
;
3191 sector_t old_capacity
= sdkp
->capacity
;
3192 unsigned char *buffer
;
3193 unsigned int dev_max
, rw_max
;
3195 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3196 "sd_revalidate_disk\n"));
3199 * If the device is offline, don't try and read capacity or any
3200 * of the other niceties.
3202 if (!scsi_device_online(sdp
))
3205 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3207 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3208 "allocation failure.\n");
3212 sd_spinup_disk(sdkp
);
3215 * Without media there is no reason to ask; moreover, some devices
3216 * react badly if we do.
3218 if (sdkp
->media_present
) {
3219 sd_read_capacity(sdkp
, buffer
);
3222 * set the default to rotational. All non-rotational devices
3223 * support the block characteristics VPD page, which will
3224 * cause this to be updated correctly and any device which
3225 * doesn't support it should be treated as rotational.
3227 blk_queue_flag_clear(QUEUE_FLAG_NONROT
, q
);
3228 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM
, q
);
3230 if (scsi_device_supports_vpd(sdp
)) {
3231 sd_read_block_provisioning(sdkp
);
3232 sd_read_block_limits(sdkp
);
3233 sd_read_block_characteristics(sdkp
);
3234 sd_zbc_read_zones(sdkp
, buffer
);
3237 sd_print_capacity(sdkp
, old_capacity
);
3239 sd_read_write_protect_flag(sdkp
, buffer
);
3240 sd_read_cache_type(sdkp
, buffer
);
3241 sd_read_app_tag_own(sdkp
, buffer
);
3242 sd_read_write_same(sdkp
, buffer
);
3243 sd_read_security(sdkp
, buffer
);
3247 * We now have all cache related info, determine how we deal
3248 * with flush requests.
3250 sd_set_flush_flag(sdkp
);
3252 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3253 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3255 /* Some devices report a maximum block count for READ/WRITE requests. */
3256 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3257 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3259 if (sd_validate_opt_xfer_size(sdkp
, dev_max
)) {
3260 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3261 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3263 q
->limits
.io_opt
= 0;
3264 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3265 (sector_t
)BLK_DEF_MAX_SECTORS
);
3268 /* Do not exceed controller limit */
3269 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3272 * Only update max_sectors if previously unset or if the current value
3273 * exceeds the capabilities of the hardware.
3275 if (sdkp
->first_scan
||
3276 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3277 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3278 q
->limits
.max_sectors
= rw_max
;
3280 sdkp
->first_scan
= 0;
3282 set_capacity_and_notify(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3283 sd_config_write_same(sdkp
);
3287 * For a zoned drive, revalidating the zones can be done only once
3288 * the gendisk capacity is set. So if this fails, set back the gendisk
3291 if (sd_zbc_revalidate_zones(sdkp
))
3292 set_capacity_and_notify(disk
, 0);
3299 * sd_unlock_native_capacity - unlock native capacity
3300 * @disk: struct gendisk to set capacity for
3302 * Block layer calls this function if it detects that partitions
3303 * on @disk reach beyond the end of the device. If the SCSI host
3304 * implements ->unlock_native_capacity() method, it's invoked to
3305 * give it a chance to adjust the device capacity.
3308 * Defined by block layer. Might sleep.
3310 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3312 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3314 if (sdev
->host
->hostt
->unlock_native_capacity
)
3315 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3319 * sd_format_disk_name - format disk name
3320 * @prefix: name prefix - ie. "sd" for SCSI disks
3321 * @index: index of the disk to format name for
3322 * @buf: output buffer
3323 * @buflen: length of the output buffer
3325 * SCSI disk names starts at sda. The 26th device is sdz and the
3326 * 27th is sdaa. The last one for two lettered suffix is sdzz
3327 * which is followed by sdaaa.
3329 * This is basically 26 base counting with one extra 'nil' entry
3330 * at the beginning from the second digit on and can be
3331 * determined using similar method as 26 base conversion with the
3332 * index shifted -1 after each digit is computed.
3338 * 0 on success, -errno on failure.
3340 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3342 const int base
= 'z' - 'a' + 1;
3343 char *begin
= buf
+ strlen(prefix
);
3344 char *end
= buf
+ buflen
;
3354 *--p
= 'a' + (index
% unit
);
3355 index
= (index
/ unit
) - 1;
3356 } while (index
>= 0);
3358 memmove(begin
, p
, end
- p
);
3359 memcpy(buf
, prefix
, strlen(prefix
));
3365 * sd_probe - called during driver initialization and whenever a
3366 * new scsi device is attached to the system. It is called once
3367 * for each scsi device (not just disks) present.
3368 * @dev: pointer to device object
3370 * Returns 0 if successful (or not interested in this scsi device
3371 * (e.g. scanner)); 1 when there is an error.
3373 * Note: this function is invoked from the scsi mid-level.
3374 * This function sets up the mapping between a given
3375 * <host,channel,id,lun> (found in sdp) and new device name
3376 * (e.g. /dev/sda). More precisely it is the block device major
3377 * and minor number that is chosen here.
3379 * Assume sd_probe is not re-entrant (for time being)
3380 * Also think about sd_probe() and sd_remove() running coincidentally.
3382 static int sd_probe(struct device
*dev
)
3384 struct scsi_device
*sdp
= to_scsi_device(dev
);
3385 struct scsi_disk
*sdkp
;
3390 scsi_autopm_get_device(sdp
);
3392 if (sdp
->type
!= TYPE_DISK
&&
3393 sdp
->type
!= TYPE_ZBC
&&
3394 sdp
->type
!= TYPE_MOD
&&
3395 sdp
->type
!= TYPE_RBC
)
3398 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED
) && sdp
->type
== TYPE_ZBC
) {
3399 sdev_printk(KERN_WARNING
, sdp
,
3400 "Unsupported ZBC host-managed device.\n");
3404 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3408 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3412 gd
= __alloc_disk_node(sdp
->request_queue
, NUMA_NO_NODE
,
3413 &sd_bio_compl_lkclass
);
3417 index
= ida_alloc(&sd_index_ida
, GFP_KERNEL
);
3419 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3423 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3425 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3426 goto out_free_index
;
3430 sdkp
->driver
= &sd_template
;
3432 sdkp
->index
= index
;
3433 sdkp
->max_retries
= SD_MAX_RETRIES
;
3434 atomic_set(&sdkp
->openers
, 0);
3435 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3437 if (!sdp
->request_queue
->rq_timeout
) {
3438 if (sdp
->type
!= TYPE_MOD
)
3439 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3441 blk_queue_rq_timeout(sdp
->request_queue
,
3445 device_initialize(&sdkp
->dev
);
3446 sdkp
->dev
.parent
= dev
;
3447 sdkp
->dev
.class = &sd_disk_class
;
3448 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3450 error
= device_add(&sdkp
->dev
);
3452 goto out_free_index
;
3455 dev_set_drvdata(dev
, sdkp
);
3457 gd
->major
= sd_major((index
& 0xf0) >> 4);
3458 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3459 gd
->minors
= SD_MINORS
;
3461 gd
->fops
= &sd_fops
;
3462 gd
->private_data
= &sdkp
->driver
;
3464 /* defaults, until the device tells us otherwise */
3465 sdp
->sector_size
= 512;
3467 sdkp
->media_present
= 1;
3468 sdkp
->write_prot
= 0;
3469 sdkp
->cache_override
= 0;
3473 sdkp
->first_scan
= 1;
3474 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3476 sd_revalidate_disk(gd
);
3478 gd
->flags
= GENHD_FL_EXT_DEVT
;
3479 if (sdp
->removable
) {
3480 gd
->flags
|= GENHD_FL_REMOVABLE
;
3481 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3482 gd
->event_flags
= DISK_EVENT_FLAG_POLL
| DISK_EVENT_FLAG_UEVENT
;
3485 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3486 if (sdp
->rpm_autosuspend
) {
3487 pm_runtime_set_autosuspend_delay(dev
,
3488 sdp
->host
->hostt
->rpm_autosuspend_delay
);
3490 device_add_disk(dev
, gd
, NULL
);
3492 sd_dif_config_host(sdkp
);
3494 sd_revalidate_disk(gd
);
3496 if (sdkp
->security
) {
3497 sdkp
->opal_dev
= init_opal_dev(sdkp
, &sd_sec_submit
);
3499 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3502 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3503 sdp
->removable
? "removable " : "");
3504 scsi_autopm_put_device(sdp
);
3509 ida_free(&sd_index_ida
, index
);
3513 sd_zbc_release_disk(sdkp
);
3516 scsi_autopm_put_device(sdp
);
3521 * sd_remove - called whenever a scsi disk (previously recognized by
3522 * sd_probe) is detached from the system. It is called (potentially
3523 * multiple times) during sd module unload.
3524 * @dev: pointer to device object
3526 * Note: this function is invoked from the scsi mid-level.
3527 * This function potentially frees up a device name (e.g. /dev/sdc)
3528 * that could be re-used by a subsequent sd_probe().
3529 * This function is not called when the built-in sd driver is "exit-ed".
3531 static int sd_remove(struct device
*dev
)
3533 struct scsi_disk
*sdkp
;
3535 sdkp
= dev_get_drvdata(dev
);
3536 scsi_autopm_get_device(sdkp
->device
);
3538 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3539 device_del(&sdkp
->dev
);
3540 del_gendisk(sdkp
->disk
);
3543 free_opal_dev(sdkp
->opal_dev
);
3545 mutex_lock(&sd_ref_mutex
);
3546 dev_set_drvdata(dev
, NULL
);
3547 put_device(&sdkp
->dev
);
3548 mutex_unlock(&sd_ref_mutex
);
3554 * scsi_disk_release - Called to free the scsi_disk structure
3555 * @dev: pointer to embedded class device
3557 * sd_ref_mutex must be held entering this routine. Because it is
3558 * called on last put, you should always use the scsi_disk_get()
3559 * scsi_disk_put() helpers which manipulate the semaphore directly
3560 * and never do a direct put_device.
3562 static void scsi_disk_release(struct device
*dev
)
3564 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3565 struct gendisk
*disk
= sdkp
->disk
;
3566 struct request_queue
*q
= disk
->queue
;
3568 ida_free(&sd_index_ida
, sdkp
->index
);
3571 * Wait until all requests that are in progress have completed.
3572 * This is necessary to avoid that e.g. scsi_end_request() crashes
3573 * due to clearing the disk->private_data pointer. Wait from inside
3574 * scsi_disk_release() instead of from sd_release() to avoid that
3575 * freezing and unfreezing the request queue affects user space I/O
3576 * in case multiple processes open a /dev/sd... node concurrently.
3578 blk_mq_freeze_queue(q
);
3579 blk_mq_unfreeze_queue(q
);
3581 disk
->private_data
= NULL
;
3583 put_device(&sdkp
->device
->sdev_gendev
);
3585 sd_zbc_release_disk(sdkp
);
3590 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3592 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3593 struct scsi_sense_hdr sshdr
;
3594 struct scsi_device
*sdp
= sdkp
->device
;
3598 cmd
[4] |= 1; /* START */
3600 if (sdp
->start_stop_pwr_cond
)
3601 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3603 if (!scsi_device_online(sdp
))
3606 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3607 SD_TIMEOUT
, sdkp
->max_retries
, 0, RQF_PM
, NULL
);
3609 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3610 if (res
> 0 && scsi_sense_valid(&sshdr
)) {
3611 sd_print_sense_hdr(sdkp
, &sshdr
);
3612 /* 0x3a is medium not present */
3613 if (sshdr
.asc
== 0x3a)
3618 /* SCSI error codes must not go to the generic layer */
3626 * Send a SYNCHRONIZE CACHE instruction down to the device through
3627 * the normal SCSI command structure. Wait for the command to
3630 static void sd_shutdown(struct device
*dev
)
3632 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3635 return; /* this can happen */
3637 if (pm_runtime_suspended(dev
))
3640 if (sdkp
->WCE
&& sdkp
->media_present
) {
3641 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3642 sd_sync_cache(sdkp
, NULL
);
3645 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3646 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3647 sd_start_stop_device(sdkp
, 0);
3651 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3653 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3654 struct scsi_sense_hdr sshdr
;
3657 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3660 if (sdkp
->WCE
&& sdkp
->media_present
) {
3661 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3662 ret
= sd_sync_cache(sdkp
, &sshdr
);
3665 /* ignore OFFLINE device */
3669 if (!scsi_sense_valid(&sshdr
) ||
3670 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3674 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3675 * doesn't support sync. There's not much to do and
3676 * suspend shouldn't fail.
3682 if (sdkp
->device
->manage_start_stop
) {
3683 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3684 /* an error is not worth aborting a system sleep */
3685 ret
= sd_start_stop_device(sdkp
, 0);
3686 if (ignore_stop_errors
)
3693 static int sd_suspend_system(struct device
*dev
)
3695 return sd_suspend_common(dev
, true);
3698 static int sd_suspend_runtime(struct device
*dev
)
3700 return sd_suspend_common(dev
, false);
3703 static int sd_resume(struct device
*dev
)
3705 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3708 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3711 if (!sdkp
->device
->manage_start_stop
)
3714 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3715 ret
= sd_start_stop_device(sdkp
, 1);
3717 opal_unlock_from_suspend(sdkp
->opal_dev
);
3722 * init_sd - entry point for this driver (both when built in or when
3725 * Note: this function registers this driver with the scsi mid-level.
3727 static int __init
init_sd(void)
3729 int majors
= 0, i
, err
;
3731 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3733 for (i
= 0; i
< SD_MAJORS
; i
++) {
3734 if (__register_blkdev(sd_major(i
), "sd", sd_default_probe
))
3742 err
= class_register(&sd_disk_class
);
3746 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3748 if (!sd_cdb_cache
) {
3749 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3754 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3756 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3761 sd_page_pool
= mempool_create_page_pool(SD_MEMPOOL_SIZE
, 0);
3762 if (!sd_page_pool
) {
3763 printk(KERN_ERR
"sd: can't init discard page pool\n");
3768 err
= scsi_register_driver(&sd_template
.gendrv
);
3770 goto err_out_driver
;
3775 mempool_destroy(sd_page_pool
);
3778 mempool_destroy(sd_cdb_pool
);
3781 kmem_cache_destroy(sd_cdb_cache
);
3784 class_unregister(&sd_disk_class
);
3786 for (i
= 0; i
< SD_MAJORS
; i
++)
3787 unregister_blkdev(sd_major(i
), "sd");
3792 * exit_sd - exit point for this driver (when it is a module).
3794 * Note: this function unregisters this driver from the scsi mid-level.
3796 static void __exit
exit_sd(void)
3800 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3802 scsi_unregister_driver(&sd_template
.gendrv
);
3803 mempool_destroy(sd_cdb_pool
);
3804 mempool_destroy(sd_page_pool
);
3805 kmem_cache_destroy(sd_cdb_cache
);
3807 class_unregister(&sd_disk_class
);
3809 for (i
= 0; i
< SD_MAJORS
; i
++)
3810 unregister_blkdev(sd_major(i
), "sd");
3813 module_init(init_sd
);
3814 module_exit(exit_sd
);
3816 void sd_print_sense_hdr(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
3818 scsi_print_sense_hdr(sdkp
->device
,
3819 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3822 void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
, int result
)
3824 const char *hb_string
= scsi_hostbyte_string(result
);
3827 sd_printk(KERN_INFO
, sdkp
,
3828 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3829 hb_string
? hb_string
: "invalid",
3832 sd_printk(KERN_INFO
, sdkp
,
3833 "%s: Result: hostbyte=0x%02x driverbyte=%s\n",
3834 msg
, host_byte(result
), "DRIVER_OK");