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/major.h>
52 #include <linux/mutex.h>
53 #include <linux/string_helpers.h>
54 #include <linux/async.h>
55 #include <linux/slab.h>
56 #include <linux/sed-opal.h>
57 #include <linux/pm_runtime.h>
59 #include <linux/t10-pi.h>
60 #include <linux/uaccess.h>
61 #include <asm/unaligned.h>
63 #include <scsi/scsi.h>
64 #include <scsi/scsi_cmnd.h>
65 #include <scsi/scsi_dbg.h>
66 #include <scsi/scsi_device.h>
67 #include <scsi/scsi_driver.h>
68 #include <scsi/scsi_eh.h>
69 #include <scsi/scsi_host.h>
70 #include <scsi/scsi_ioctl.h>
71 #include <scsi/scsicam.h>
74 #include "scsi_priv.h"
75 #include "scsi_logging.h"
77 MODULE_AUTHOR("Eric Youngdale");
78 MODULE_DESCRIPTION("SCSI disk (sd) driver");
79 MODULE_LICENSE("GPL");
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
94 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
95 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
96 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
98 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
99 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
100 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
104 static void sd_config_discard(struct scsi_disk
*, unsigned int);
105 static void sd_config_write_same(struct scsi_disk
*);
106 static int sd_revalidate_disk(struct gendisk
*);
107 static void sd_unlock_native_capacity(struct gendisk
*disk
);
108 static int sd_probe(struct device
*);
109 static int sd_remove(struct device
*);
110 static void sd_shutdown(struct device
*);
111 static int sd_suspend_system(struct device
*);
112 static int sd_suspend_runtime(struct device
*);
113 static int sd_resume(struct device
*);
114 static int sd_resume_runtime(struct device
*);
115 static void sd_rescan(struct device
*);
116 static blk_status_t
sd_init_command(struct scsi_cmnd
*SCpnt
);
117 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
118 static int sd_done(struct scsi_cmnd
*);
119 static void sd_eh_reset(struct scsi_cmnd
*);
120 static int sd_eh_action(struct scsi_cmnd
*, int);
121 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
122 static void scsi_disk_release(struct device
*cdev
);
124 static DEFINE_IDA(sd_index_ida
);
126 /* This semaphore is used to mediate the 0->1 reference get in the
127 * face of object destruction (i.e. we can't allow a get on an
128 * object after last put) */
129 static DEFINE_MUTEX(sd_ref_mutex
);
131 static struct kmem_cache
*sd_cdb_cache
;
132 static mempool_t
*sd_cdb_pool
;
133 static mempool_t
*sd_page_pool
;
134 static struct lock_class_key sd_bio_compl_lkclass
;
136 static const char *sd_cache_types
[] = {
137 "write through", "none", "write back",
138 "write back, no read (daft)"
141 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
143 bool wc
= false, fua
= false;
151 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
155 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
156 const char *buf
, size_t count
)
158 int ct
, rcd
, wce
, sp
;
159 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
160 struct scsi_device
*sdp
= sdkp
->device
;
163 struct scsi_mode_data data
;
164 struct scsi_sense_hdr sshdr
;
165 static const char temp
[] = "temporary ";
168 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
169 /* no cache control on RBC devices; theoretically they
170 * can do it, but there's probably so many exceptions
171 * it's not worth the risk */
174 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
175 buf
+= sizeof(temp
) - 1;
176 sdkp
->cache_override
= 1;
178 sdkp
->cache_override
= 0;
181 ct
= sysfs_match_string(sd_cache_types
, buf
);
185 rcd
= ct
& 0x01 ? 1 : 0;
186 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
188 if (sdkp
->cache_override
) {
191 sd_set_flush_flag(sdkp
);
195 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
196 sdkp
->max_retries
, &data
, NULL
))
198 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
199 data
.block_descriptor_length
);
200 buffer_data
= buffer
+ data
.header_length
+
201 data
.block_descriptor_length
;
202 buffer_data
[2] &= ~0x05;
203 buffer_data
[2] |= wce
<< 2 | rcd
;
204 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
205 buffer_data
[0] &= ~0x80;
208 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
209 * received mode parameter buffer before doing MODE SELECT.
211 data
.device_specific
= 0;
213 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
214 sdkp
->max_retries
, &data
, &sshdr
)) {
215 if (scsi_sense_valid(&sshdr
))
216 sd_print_sense_hdr(sdkp
, &sshdr
);
219 sd_revalidate_disk(sdkp
->disk
);
224 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
227 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
228 struct scsi_device
*sdp
= sdkp
->device
;
230 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
234 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
235 const char *buf
, size_t count
)
237 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
238 struct scsi_device
*sdp
= sdkp
->device
;
241 if (!capable(CAP_SYS_ADMIN
))
244 if (kstrtobool(buf
, &v
))
247 sdp
->manage_start_stop
= v
;
251 static DEVICE_ATTR_RW(manage_start_stop
);
254 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
256 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
258 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
262 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
263 const char *buf
, size_t count
)
266 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
267 struct scsi_device
*sdp
= sdkp
->device
;
269 if (!capable(CAP_SYS_ADMIN
))
272 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
275 if (kstrtobool(buf
, &v
))
278 sdp
->allow_restart
= v
;
282 static DEVICE_ATTR_RW(allow_restart
);
285 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
287 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
288 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
290 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
292 static DEVICE_ATTR_RW(cache_type
);
295 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
297 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
299 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
301 static DEVICE_ATTR_RO(FUA
);
304 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
307 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
309 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
313 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
314 const char *buf
, size_t count
)
316 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
320 if (!capable(CAP_SYS_ADMIN
))
323 err
= kstrtouint(buf
, 10, &val
);
328 if (val
<= T10_PI_TYPE3_PROTECTION
)
329 sdkp
->protection_type
= val
;
333 static DEVICE_ATTR_RW(protection_type
);
336 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
339 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
340 struct scsi_device
*sdp
= sdkp
->device
;
341 unsigned int dif
, dix
;
343 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
344 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
346 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
352 return sprintf(buf
, "none\n");
354 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
356 static DEVICE_ATTR_RO(protection_mode
);
359 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
361 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
363 return sprintf(buf
, "%u\n", sdkp
->ATO
);
365 static DEVICE_ATTR_RO(app_tag_own
);
368 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
371 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
373 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
375 static DEVICE_ATTR_RO(thin_provisioning
);
377 /* sysfs_match_string() requires dense arrays */
378 static const char *lbp_mode
[] = {
379 [SD_LBP_FULL
] = "full",
380 [SD_LBP_UNMAP
] = "unmap",
381 [SD_LBP_WS16
] = "writesame_16",
382 [SD_LBP_WS10
] = "writesame_10",
383 [SD_LBP_ZERO
] = "writesame_zero",
384 [SD_LBP_DISABLE
] = "disabled",
388 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
391 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
393 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
397 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
398 const char *buf
, size_t count
)
400 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
401 struct scsi_device
*sdp
= sdkp
->device
;
404 if (!capable(CAP_SYS_ADMIN
))
407 if (sd_is_zoned(sdkp
)) {
408 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
412 if (sdp
->type
!= TYPE_DISK
)
415 mode
= sysfs_match_string(lbp_mode
, buf
);
419 sd_config_discard(sdkp
, mode
);
423 static DEVICE_ATTR_RW(provisioning_mode
);
425 /* sysfs_match_string() requires dense arrays */
426 static const char *zeroing_mode
[] = {
427 [SD_ZERO_WRITE
] = "write",
428 [SD_ZERO_WS
] = "writesame",
429 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
430 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
434 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
437 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
439 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
443 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
444 const char *buf
, size_t count
)
446 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
449 if (!capable(CAP_SYS_ADMIN
))
452 mode
= sysfs_match_string(zeroing_mode
, buf
);
456 sdkp
->zeroing_mode
= mode
;
460 static DEVICE_ATTR_RW(zeroing_mode
);
463 max_medium_access_timeouts_show(struct device
*dev
,
464 struct device_attribute
*attr
, char *buf
)
466 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
468 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
472 max_medium_access_timeouts_store(struct device
*dev
,
473 struct device_attribute
*attr
, const char *buf
,
476 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
479 if (!capable(CAP_SYS_ADMIN
))
482 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
484 return err
? err
: count
;
486 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
489 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
492 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
494 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
498 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
499 const char *buf
, size_t count
)
501 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
502 struct scsi_device
*sdp
= sdkp
->device
;
506 if (!capable(CAP_SYS_ADMIN
))
509 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
512 err
= kstrtoul(buf
, 10, &max
);
518 sdp
->no_write_same
= 1;
519 else if (max
<= SD_MAX_WS16_BLOCKS
) {
520 sdp
->no_write_same
= 0;
521 sdkp
->max_ws_blocks
= max
;
524 sd_config_write_same(sdkp
);
528 static DEVICE_ATTR_RW(max_write_same_blocks
);
531 zoned_cap_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
533 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
535 if (sdkp
->device
->type
== TYPE_ZBC
)
536 return sprintf(buf
, "host-managed\n");
537 if (sdkp
->zoned
== 1)
538 return sprintf(buf
, "host-aware\n");
539 if (sdkp
->zoned
== 2)
540 return sprintf(buf
, "drive-managed\n");
541 return sprintf(buf
, "none\n");
543 static DEVICE_ATTR_RO(zoned_cap
);
546 max_retries_store(struct device
*dev
, struct device_attribute
*attr
,
547 const char *buf
, size_t count
)
549 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
550 struct scsi_device
*sdev
= sdkp
->device
;
553 err
= kstrtoint(buf
, 10, &retries
);
557 if (retries
== SCSI_CMD_RETRIES_NO_LIMIT
|| retries
<= SD_MAX_RETRIES
) {
558 sdkp
->max_retries
= retries
;
562 sdev_printk(KERN_ERR
, sdev
, "max_retries must be between -1 and %d\n",
568 max_retries_show(struct device
*dev
, struct device_attribute
*attr
,
571 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
573 return sprintf(buf
, "%d\n", sdkp
->max_retries
);
576 static DEVICE_ATTR_RW(max_retries
);
578 static struct attribute
*sd_disk_attrs
[] = {
579 &dev_attr_cache_type
.attr
,
581 &dev_attr_allow_restart
.attr
,
582 &dev_attr_manage_start_stop
.attr
,
583 &dev_attr_protection_type
.attr
,
584 &dev_attr_protection_mode
.attr
,
585 &dev_attr_app_tag_own
.attr
,
586 &dev_attr_thin_provisioning
.attr
,
587 &dev_attr_provisioning_mode
.attr
,
588 &dev_attr_zeroing_mode
.attr
,
589 &dev_attr_max_write_same_blocks
.attr
,
590 &dev_attr_max_medium_access_timeouts
.attr
,
591 &dev_attr_zoned_cap
.attr
,
592 &dev_attr_max_retries
.attr
,
595 ATTRIBUTE_GROUPS(sd_disk
);
597 static struct class sd_disk_class
= {
599 .owner
= THIS_MODULE
,
600 .dev_release
= scsi_disk_release
,
601 .dev_groups
= sd_disk_groups
,
604 static const struct dev_pm_ops sd_pm_ops
= {
605 .suspend
= sd_suspend_system
,
607 .poweroff
= sd_suspend_system
,
608 .restore
= sd_resume
,
609 .runtime_suspend
= sd_suspend_runtime
,
610 .runtime_resume
= sd_resume_runtime
,
613 static struct scsi_driver sd_template
= {
616 .owner
= THIS_MODULE
,
618 .probe_type
= PROBE_PREFER_ASYNCHRONOUS
,
620 .shutdown
= sd_shutdown
,
624 .init_command
= sd_init_command
,
625 .uninit_command
= sd_uninit_command
,
627 .eh_action
= sd_eh_action
,
628 .eh_reset
= sd_eh_reset
,
632 * Don't request a new module, as that could deadlock in multipath
635 static void sd_default_probe(dev_t devt
)
640 * Device no to disk mapping:
642 * major disc2 disc p1
643 * |............|.............|....|....| <- dev_t
646 * Inside a major, we have 16k disks, however mapped non-
647 * contiguously. The first 16 disks are for major0, the next
648 * ones with major1, ... Disk 256 is for major0 again, disk 272
650 * As we stay compatible with our numbering scheme, we can reuse
651 * the well-know SCSI majors 8, 65--71, 136--143.
653 static int sd_major(int major_idx
)
657 return SCSI_DISK0_MAJOR
;
659 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
661 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
664 return 0; /* shut up gcc */
668 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
670 struct scsi_disk
*sdkp
= NULL
;
672 mutex_lock(&sd_ref_mutex
);
674 if (disk
->private_data
) {
675 sdkp
= scsi_disk(disk
);
676 if (scsi_device_get(sdkp
->device
) == 0)
677 get_device(&sdkp
->dev
);
681 mutex_unlock(&sd_ref_mutex
);
685 static void scsi_disk_put(struct scsi_disk
*sdkp
)
687 struct scsi_device
*sdev
= sdkp
->device
;
689 mutex_lock(&sd_ref_mutex
);
690 put_device(&sdkp
->dev
);
691 scsi_device_put(sdev
);
692 mutex_unlock(&sd_ref_mutex
);
695 #ifdef CONFIG_BLK_SED_OPAL
696 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
697 size_t len
, bool send
)
699 struct scsi_disk
*sdkp
= data
;
700 struct scsi_device
*sdev
= sdkp
->device
;
704 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
706 put_unaligned_be16(spsp
, &cdb
[2]);
707 put_unaligned_be32(len
, &cdb
[6]);
709 ret
= scsi_execute(sdev
, cdb
, send
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
,
710 buffer
, len
, NULL
, NULL
, SD_TIMEOUT
, sdkp
->max_retries
, 0,
712 return ret
<= 0 ? ret
: -EIO
;
714 #endif /* CONFIG_BLK_SED_OPAL */
717 * Look up the DIX operation based on whether the command is read or
718 * write and whether dix and dif are enabled.
720 static unsigned int sd_prot_op(bool write
, bool dix
, bool dif
)
722 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
723 static const unsigned int ops
[] = { /* wrt dix dif */
724 SCSI_PROT_NORMAL
, /* 0 0 0 */
725 SCSI_PROT_READ_STRIP
, /* 0 0 1 */
726 SCSI_PROT_READ_INSERT
, /* 0 1 0 */
727 SCSI_PROT_READ_PASS
, /* 0 1 1 */
728 SCSI_PROT_NORMAL
, /* 1 0 0 */
729 SCSI_PROT_WRITE_INSERT
, /* 1 0 1 */
730 SCSI_PROT_WRITE_STRIP
, /* 1 1 0 */
731 SCSI_PROT_WRITE_PASS
, /* 1 1 1 */
734 return ops
[write
<< 2 | dix
<< 1 | dif
];
738 * Returns a mask of the protection flags that are valid for a given DIX
741 static unsigned int sd_prot_flag_mask(unsigned int prot_op
)
743 static const unsigned int flag_mask
[] = {
744 [SCSI_PROT_NORMAL
] = 0,
746 [SCSI_PROT_READ_STRIP
] = SCSI_PROT_TRANSFER_PI
|
747 SCSI_PROT_GUARD_CHECK
|
748 SCSI_PROT_REF_CHECK
|
749 SCSI_PROT_REF_INCREMENT
,
751 [SCSI_PROT_READ_INSERT
] = SCSI_PROT_REF_INCREMENT
|
752 SCSI_PROT_IP_CHECKSUM
,
754 [SCSI_PROT_READ_PASS
] = SCSI_PROT_TRANSFER_PI
|
755 SCSI_PROT_GUARD_CHECK
|
756 SCSI_PROT_REF_CHECK
|
757 SCSI_PROT_REF_INCREMENT
|
758 SCSI_PROT_IP_CHECKSUM
,
760 [SCSI_PROT_WRITE_INSERT
] = SCSI_PROT_TRANSFER_PI
|
761 SCSI_PROT_REF_INCREMENT
,
763 [SCSI_PROT_WRITE_STRIP
] = SCSI_PROT_GUARD_CHECK
|
764 SCSI_PROT_REF_CHECK
|
765 SCSI_PROT_REF_INCREMENT
|
766 SCSI_PROT_IP_CHECKSUM
,
768 [SCSI_PROT_WRITE_PASS
] = SCSI_PROT_TRANSFER_PI
|
769 SCSI_PROT_GUARD_CHECK
|
770 SCSI_PROT_REF_CHECK
|
771 SCSI_PROT_REF_INCREMENT
|
772 SCSI_PROT_IP_CHECKSUM
,
775 return flag_mask
[prot_op
];
778 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
779 unsigned int dix
, unsigned int dif
)
781 struct request
*rq
= scsi_cmd_to_rq(scmd
);
782 struct bio
*bio
= rq
->bio
;
783 unsigned int prot_op
= sd_prot_op(rq_data_dir(rq
), dix
, dif
);
784 unsigned int protect
= 0;
786 if (dix
) { /* DIX Type 0, 1, 2, 3 */
787 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
788 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
790 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
791 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
794 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
795 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
797 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
798 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
801 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
802 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
804 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
805 protect
= 3 << 5; /* Disable target PI checking */
807 protect
= 1 << 5; /* Enable target PI checking */
810 scsi_set_prot_op(scmd
, prot_op
);
811 scsi_set_prot_type(scmd
, dif
);
812 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
817 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
819 struct request_queue
*q
= sdkp
->disk
->queue
;
820 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
821 unsigned int max_blocks
= 0;
823 q
->limits
.discard_alignment
=
824 sdkp
->unmap_alignment
* logical_block_size
;
825 q
->limits
.discard_granularity
=
826 max(sdkp
->physical_block_size
,
827 sdkp
->unmap_granularity
* logical_block_size
);
828 sdkp
->provisioning_mode
= mode
;
834 blk_queue_max_discard_sectors(q
, 0);
835 blk_queue_flag_clear(QUEUE_FLAG_DISCARD
, q
);
839 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
840 (u32
)SD_MAX_WS16_BLOCKS
);
844 if (sdkp
->device
->unmap_limit_for_ws
)
845 max_blocks
= sdkp
->max_unmap_blocks
;
847 max_blocks
= sdkp
->max_ws_blocks
;
849 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
853 if (sdkp
->device
->unmap_limit_for_ws
)
854 max_blocks
= sdkp
->max_unmap_blocks
;
856 max_blocks
= sdkp
->max_ws_blocks
;
858 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
862 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
863 (u32
)SD_MAX_WS10_BLOCKS
);
867 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
868 blk_queue_flag_set(QUEUE_FLAG_DISCARD
, q
);
871 static blk_status_t
sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
873 struct scsi_device
*sdp
= cmd
->device
;
874 struct request
*rq
= scsi_cmd_to_rq(cmd
);
875 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
876 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
877 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
878 unsigned int data_len
= 24;
881 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
882 if (!rq
->special_vec
.bv_page
)
883 return BLK_STS_RESOURCE
;
884 clear_highpage(rq
->special_vec
.bv_page
);
885 rq
->special_vec
.bv_offset
= 0;
886 rq
->special_vec
.bv_len
= data_len
;
887 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
890 cmd
->cmnd
[0] = UNMAP
;
893 buf
= bvec_virt(&rq
->special_vec
);
894 put_unaligned_be16(6 + 16, &buf
[0]);
895 put_unaligned_be16(16, &buf
[2]);
896 put_unaligned_be64(lba
, &buf
[8]);
897 put_unaligned_be32(nr_blocks
, &buf
[16]);
899 cmd
->allowed
= sdkp
->max_retries
;
900 cmd
->transfersize
= data_len
;
901 rq
->timeout
= SD_TIMEOUT
;
903 return scsi_alloc_sgtables(cmd
);
906 static blk_status_t
sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
,
909 struct scsi_device
*sdp
= cmd
->device
;
910 struct request
*rq
= scsi_cmd_to_rq(cmd
);
911 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
912 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
913 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
914 u32 data_len
= sdp
->sector_size
;
916 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
917 if (!rq
->special_vec
.bv_page
)
918 return BLK_STS_RESOURCE
;
919 clear_highpage(rq
->special_vec
.bv_page
);
920 rq
->special_vec
.bv_offset
= 0;
921 rq
->special_vec
.bv_len
= data_len
;
922 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
925 cmd
->cmnd
[0] = WRITE_SAME_16
;
927 cmd
->cmnd
[1] = 0x8; /* UNMAP */
928 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
929 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
931 cmd
->allowed
= sdkp
->max_retries
;
932 cmd
->transfersize
= data_len
;
933 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
935 return scsi_alloc_sgtables(cmd
);
938 static blk_status_t
sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
,
941 struct scsi_device
*sdp
= cmd
->device
;
942 struct request
*rq
= scsi_cmd_to_rq(cmd
);
943 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
944 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
945 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
946 u32 data_len
= sdp
->sector_size
;
948 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
949 if (!rq
->special_vec
.bv_page
)
950 return BLK_STS_RESOURCE
;
951 clear_highpage(rq
->special_vec
.bv_page
);
952 rq
->special_vec
.bv_offset
= 0;
953 rq
->special_vec
.bv_len
= data_len
;
954 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
957 cmd
->cmnd
[0] = WRITE_SAME
;
959 cmd
->cmnd
[1] = 0x8; /* UNMAP */
960 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
961 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
963 cmd
->allowed
= sdkp
->max_retries
;
964 cmd
->transfersize
= data_len
;
965 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
967 return scsi_alloc_sgtables(cmd
);
970 static blk_status_t
sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
972 struct request
*rq
= scsi_cmd_to_rq(cmd
);
973 struct scsi_device
*sdp
= cmd
->device
;
974 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
975 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
976 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
978 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
979 switch (sdkp
->zeroing_mode
) {
980 case SD_ZERO_WS16_UNMAP
:
981 return sd_setup_write_same16_cmnd(cmd
, true);
982 case SD_ZERO_WS10_UNMAP
:
983 return sd_setup_write_same10_cmnd(cmd
, true);
987 if (sdp
->no_write_same
) {
988 rq
->rq_flags
|= RQF_QUIET
;
989 return BLK_STS_TARGET
;
992 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff)
993 return sd_setup_write_same16_cmnd(cmd
, false);
995 return sd_setup_write_same10_cmnd(cmd
, false);
998 static void sd_config_write_same(struct scsi_disk
*sdkp
)
1000 struct request_queue
*q
= sdkp
->disk
->queue
;
1001 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
1003 if (sdkp
->device
->no_write_same
) {
1004 sdkp
->max_ws_blocks
= 0;
1008 /* Some devices can not handle block counts above 0xffff despite
1009 * supporting WRITE SAME(16). Consequently we default to 64k
1010 * blocks per I/O unless the device explicitly advertises a
1013 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
1014 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
1015 (u32
)SD_MAX_WS16_BLOCKS
);
1016 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
1017 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
1018 (u32
)SD_MAX_WS10_BLOCKS
);
1020 sdkp
->device
->no_write_same
= 1;
1021 sdkp
->max_ws_blocks
= 0;
1024 if (sdkp
->lbprz
&& sdkp
->lbpws
)
1025 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
1026 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
1027 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
1028 else if (sdkp
->max_ws_blocks
)
1029 sdkp
->zeroing_mode
= SD_ZERO_WS
;
1031 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
1033 if (sdkp
->max_ws_blocks
&&
1034 sdkp
->physical_block_size
> logical_block_size
) {
1036 * Reporting a maximum number of blocks that is not aligned
1037 * on the device physical size would cause a large write same
1038 * request to be split into physically unaligned chunks by
1039 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
1040 * even if the caller of these functions took care to align the
1041 * large request. So make sure the maximum reported is aligned
1042 * to the device physical block size. This is only an optional
1043 * optimization for regular disks, but this is mandatory to
1044 * avoid failure of large write same requests directed at
1045 * sequential write required zones of host-managed ZBC disks.
1047 sdkp
->max_ws_blocks
=
1048 round_down(sdkp
->max_ws_blocks
,
1049 bytes_to_logical(sdkp
->device
,
1050 sdkp
->physical_block_size
));
1054 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
1055 (logical_block_size
>> 9));
1056 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
1057 (logical_block_size
>> 9));
1061 * sd_setup_write_same_cmnd - write the same data to multiple blocks
1062 * @cmd: command to prepare
1064 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
1065 * the preference indicated by the target device.
1067 static blk_status_t
sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
1069 struct request
*rq
= scsi_cmd_to_rq(cmd
);
1070 struct scsi_device
*sdp
= cmd
->device
;
1071 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1072 struct bio
*bio
= rq
->bio
;
1073 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1074 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1077 if (sdkp
->device
->no_write_same
)
1078 return BLK_STS_TARGET
;
1080 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
1082 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
1084 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff) {
1086 cmd
->cmnd
[0] = WRITE_SAME_16
;
1087 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1088 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1091 cmd
->cmnd
[0] = WRITE_SAME
;
1092 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1093 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1096 cmd
->transfersize
= sdp
->sector_size
;
1097 cmd
->allowed
= sdkp
->max_retries
;
1100 * For WRITE SAME the data transferred via the DATA OUT buffer is
1101 * different from the amount of data actually written to the target.
1103 * We set up __data_len to the amount of data transferred via the
1104 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1105 * to transfer a single sector of data first, but then reset it to
1106 * the amount of data to be written right after so that the I/O path
1107 * knows how much to actually write.
1109 rq
->__data_len
= sdp
->sector_size
;
1110 ret
= scsi_alloc_sgtables(cmd
);
1111 rq
->__data_len
= blk_rq_bytes(rq
);
1116 static blk_status_t
sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
1118 struct request
*rq
= scsi_cmd_to_rq(cmd
);
1119 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1121 /* flush requests don't perform I/O, zero the S/G table */
1122 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
1124 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
1126 cmd
->transfersize
= 0;
1127 cmd
->allowed
= sdkp
->max_retries
;
1129 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1133 static blk_status_t
sd_setup_rw32_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1134 sector_t lba
, unsigned int nr_blocks
,
1135 unsigned char flags
)
1137 cmd
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1138 if (unlikely(cmd
->cmnd
== NULL
))
1139 return BLK_STS_RESOURCE
;
1141 cmd
->cmd_len
= SD_EXT_CDB_SIZE
;
1142 memset(cmd
->cmnd
, 0, cmd
->cmd_len
);
1144 cmd
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1145 cmd
->cmnd
[7] = 0x18; /* Additional CDB len */
1146 cmd
->cmnd
[9] = write
? WRITE_32
: READ_32
;
1147 cmd
->cmnd
[10] = flags
;
1148 put_unaligned_be64(lba
, &cmd
->cmnd
[12]);
1149 put_unaligned_be32(lba
, &cmd
->cmnd
[20]); /* Expected Indirect LBA */
1150 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[28]);
1155 static blk_status_t
sd_setup_rw16_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1156 sector_t lba
, unsigned int nr_blocks
,
1157 unsigned char flags
)
1160 cmd
->cmnd
[0] = write
? WRITE_16
: READ_16
;
1161 cmd
->cmnd
[1] = flags
;
1164 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1165 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1170 static blk_status_t
sd_setup_rw10_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1171 sector_t lba
, unsigned int nr_blocks
,
1172 unsigned char flags
)
1175 cmd
->cmnd
[0] = write
? WRITE_10
: READ_10
;
1176 cmd
->cmnd
[1] = flags
;
1179 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1180 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1185 static blk_status_t
sd_setup_rw6_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1186 sector_t lba
, unsigned int nr_blocks
,
1187 unsigned char flags
)
1189 /* Avoid that 0 blocks gets translated into 256 blocks. */
1190 if (WARN_ON_ONCE(nr_blocks
== 0))
1191 return BLK_STS_IOERR
;
1193 if (unlikely(flags
& 0x8)) {
1195 * This happens only if this drive failed 10byte rw
1196 * command with ILLEGAL_REQUEST during operation and
1197 * thus turned off use_10_for_rw.
1199 scmd_printk(KERN_ERR
, cmd
, "FUA write on READ/WRITE(6) drive\n");
1200 return BLK_STS_IOERR
;
1204 cmd
->cmnd
[0] = write
? WRITE_6
: READ_6
;
1205 cmd
->cmnd
[1] = (lba
>> 16) & 0x1f;
1206 cmd
->cmnd
[2] = (lba
>> 8) & 0xff;
1207 cmd
->cmnd
[3] = lba
& 0xff;
1208 cmd
->cmnd
[4] = nr_blocks
;
1214 static blk_status_t
sd_setup_read_write_cmnd(struct scsi_cmnd
*cmd
)
1216 struct request
*rq
= scsi_cmd_to_rq(cmd
);
1217 struct scsi_device
*sdp
= cmd
->device
;
1218 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1219 sector_t lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1221 unsigned int nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1222 unsigned int mask
= logical_to_sectors(sdp
, 1) - 1;
1223 bool write
= rq_data_dir(rq
) == WRITE
;
1224 unsigned char protect
, fua
;
1229 ret
= scsi_alloc_sgtables(cmd
);
1230 if (ret
!= BLK_STS_OK
)
1233 ret
= BLK_STS_IOERR
;
1234 if (!scsi_device_online(sdp
) || sdp
->changed
) {
1235 scmd_printk(KERN_ERR
, cmd
, "device offline or changed\n");
1239 if (blk_rq_pos(rq
) + blk_rq_sectors(rq
) > get_capacity(rq
->rq_disk
)) {
1240 scmd_printk(KERN_ERR
, cmd
, "access beyond end of device\n");
1244 if ((blk_rq_pos(rq
) & mask
) || (blk_rq_sectors(rq
) & mask
)) {
1245 scmd_printk(KERN_ERR
, cmd
, "request not aligned to the logical block size\n");
1250 * Some SD card readers can't handle accesses which touch the
1251 * last one or two logical blocks. Split accesses as needed.
1253 threshold
= sdkp
->capacity
- SD_LAST_BUGGY_SECTORS
;
1255 if (unlikely(sdp
->last_sector_bug
&& lba
+ nr_blocks
> threshold
)) {
1256 if (lba
< threshold
) {
1257 /* Access up to the threshold but not beyond */
1258 nr_blocks
= threshold
- lba
;
1260 /* Access only a single logical block */
1265 if (req_op(rq
) == REQ_OP_ZONE_APPEND
) {
1266 ret
= sd_zbc_prepare_zone_append(cmd
, &lba
, nr_blocks
);
1271 fua
= rq
->cmd_flags
& REQ_FUA
? 0x8 : 0;
1272 dix
= scsi_prot_sg_count(cmd
);
1273 dif
= scsi_host_dif_capable(cmd
->device
->host
, sdkp
->protection_type
);
1276 protect
= sd_setup_protect_cmnd(cmd
, dix
, dif
);
1280 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1281 ret
= sd_setup_rw32_cmnd(cmd
, write
, lba
, nr_blocks
,
1283 } else if (sdp
->use_16_for_rw
|| (nr_blocks
> 0xffff)) {
1284 ret
= sd_setup_rw16_cmnd(cmd
, write
, lba
, nr_blocks
,
1286 } else if ((nr_blocks
> 0xff) || (lba
> 0x1fffff) ||
1287 sdp
->use_10_for_rw
|| protect
) {
1288 ret
= sd_setup_rw10_cmnd(cmd
, write
, lba
, nr_blocks
,
1291 ret
= sd_setup_rw6_cmnd(cmd
, write
, lba
, nr_blocks
,
1295 if (unlikely(ret
!= BLK_STS_OK
))
1299 * We shouldn't disconnect in the middle of a sector, so with a dumb
1300 * host adapter, it's safe to assume that we can at least transfer
1301 * this many bytes between each connect / disconnect.
1303 cmd
->transfersize
= sdp
->sector_size
;
1304 cmd
->underflow
= nr_blocks
<< 9;
1305 cmd
->allowed
= sdkp
->max_retries
;
1306 cmd
->sdb
.length
= nr_blocks
* sdp
->sector_size
;
1309 scmd_printk(KERN_INFO
, cmd
,
1310 "%s: block=%llu, count=%d\n", __func__
,
1311 (unsigned long long)blk_rq_pos(rq
),
1312 blk_rq_sectors(rq
)));
1314 scmd_printk(KERN_INFO
, cmd
,
1315 "%s %d/%u 512 byte blocks.\n",
1316 write
? "writing" : "reading", nr_blocks
,
1317 blk_rq_sectors(rq
)));
1320 * This indicates that the command is ready from our end to be queued.
1324 scsi_free_sgtables(cmd
);
1328 static blk_status_t
sd_init_command(struct scsi_cmnd
*cmd
)
1330 struct request
*rq
= scsi_cmd_to_rq(cmd
);
1332 switch (req_op(rq
)) {
1333 case REQ_OP_DISCARD
:
1334 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1336 return sd_setup_unmap_cmnd(cmd
);
1338 return sd_setup_write_same16_cmnd(cmd
, true);
1340 return sd_setup_write_same10_cmnd(cmd
, true);
1342 return sd_setup_write_same10_cmnd(cmd
, false);
1344 return BLK_STS_TARGET
;
1346 case REQ_OP_WRITE_ZEROES
:
1347 return sd_setup_write_zeroes_cmnd(cmd
);
1348 case REQ_OP_WRITE_SAME
:
1349 return sd_setup_write_same_cmnd(cmd
);
1351 return sd_setup_flush_cmnd(cmd
);
1354 case REQ_OP_ZONE_APPEND
:
1355 return sd_setup_read_write_cmnd(cmd
);
1356 case REQ_OP_ZONE_RESET
:
1357 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1359 case REQ_OP_ZONE_RESET_ALL
:
1360 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_RESET_WRITE_POINTER
,
1362 case REQ_OP_ZONE_OPEN
:
1363 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_OPEN_ZONE
, false);
1364 case REQ_OP_ZONE_CLOSE
:
1365 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_CLOSE_ZONE
, false);
1366 case REQ_OP_ZONE_FINISH
:
1367 return sd_zbc_setup_zone_mgmt_cmnd(cmd
, ZO_FINISH_ZONE
, false);
1370 return BLK_STS_NOTSUPP
;
1374 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1376 struct request
*rq
= scsi_cmd_to_rq(SCpnt
);
1379 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1380 mempool_free(rq
->special_vec
.bv_page
, sd_page_pool
);
1382 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1386 mempool_free(cmnd
, sd_cdb_pool
);
1390 static bool sd_need_revalidate(struct block_device
*bdev
,
1391 struct scsi_disk
*sdkp
)
1393 if (sdkp
->device
->removable
|| sdkp
->write_prot
) {
1394 if (bdev_check_media_change(bdev
))
1399 * Force a full rescan after ioctl(BLKRRPART). While the disk state has
1400 * nothing to do with partitions, BLKRRPART is used to force a full
1401 * revalidate after things like a format for historical reasons.
1403 return test_bit(GD_NEED_PART_SCAN
, &bdev
->bd_disk
->state
);
1407 * sd_open - open a scsi disk device
1408 * @bdev: Block device of the scsi disk to open
1409 * @mode: FMODE_* mask
1411 * Returns 0 if successful. Returns a negated errno value in case
1414 * Note: This can be called from a user context (e.g. fsck(1) )
1415 * or from within the kernel (e.g. as a result of a mount(1) ).
1416 * In the latter case @inode and @filp carry an abridged amount
1417 * of information as noted above.
1419 * Locking: called with bdev->bd_disk->open_mutex held.
1421 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1423 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1424 struct scsi_device
*sdev
;
1430 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1432 sdev
= sdkp
->device
;
1435 * If the device is in error recovery, wait until it is done.
1436 * If the device is offline, then disallow any access to it.
1439 if (!scsi_block_when_processing_errors(sdev
))
1442 if (sd_need_revalidate(bdev
, sdkp
))
1443 sd_revalidate_disk(bdev
->bd_disk
);
1446 * If the drive is empty, just let the open fail.
1448 retval
= -ENOMEDIUM
;
1449 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1453 * If the device has the write protect tab set, have the open fail
1454 * if the user expects to be able to write to the thing.
1457 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1461 * It is possible that the disk changing stuff resulted in
1462 * the device being taken offline. If this is the case,
1463 * report this to the user, and don't pretend that the
1464 * open actually succeeded.
1467 if (!scsi_device_online(sdev
))
1470 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1471 if (scsi_block_when_processing_errors(sdev
))
1472 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1478 scsi_disk_put(sdkp
);
1483 * sd_release - invoked when the (last) close(2) is called on this
1485 * @disk: disk to release
1486 * @mode: FMODE_* mask
1490 * Note: may block (uninterruptible) if error recovery is underway
1493 * Locking: called with bdev->bd_disk->open_mutex held.
1495 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1497 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1498 struct scsi_device
*sdev
= sdkp
->device
;
1500 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1502 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1503 if (scsi_block_when_processing_errors(sdev
))
1504 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1507 scsi_disk_put(sdkp
);
1510 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1512 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1513 struct scsi_device
*sdp
= sdkp
->device
;
1514 struct Scsi_Host
*host
= sdp
->host
;
1515 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1518 /* default to most commonly used values */
1519 diskinfo
[0] = 0x40; /* 1 << 6 */
1520 diskinfo
[1] = 0x20; /* 1 << 5 */
1521 diskinfo
[2] = capacity
>> 11;
1523 /* override with calculated, extended default, or driver values */
1524 if (host
->hostt
->bios_param
)
1525 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1527 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1529 geo
->heads
= diskinfo
[0];
1530 geo
->sectors
= diskinfo
[1];
1531 geo
->cylinders
= diskinfo
[2];
1536 * sd_ioctl - process an ioctl
1537 * @bdev: target block device
1538 * @mode: FMODE_* mask
1539 * @cmd: ioctl command number
1540 * @arg: this is third argument given to ioctl(2) system call.
1541 * Often contains a pointer.
1543 * Returns 0 if successful (some ioctls return positive numbers on
1544 * success as well). Returns a negated errno value in case of error.
1546 * Note: most ioctls are forward onto the block subsystem or further
1547 * down in the scsi subsystem.
1549 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1550 unsigned int cmd
, unsigned long arg
)
1552 struct gendisk
*disk
= bdev
->bd_disk
;
1553 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1554 struct scsi_device
*sdp
= sdkp
->device
;
1555 void __user
*p
= (void __user
*)arg
;
1558 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1559 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1561 if (bdev_is_partition(bdev
) && !capable(CAP_SYS_RAWIO
))
1562 return -ENOIOCTLCMD
;
1565 * If we are in the middle of error recovery, don't let anyone
1566 * else try and use this device. Also, if error recovery fails, it
1567 * may try and take the device offline, in which case all further
1568 * access to the device is prohibited.
1570 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1571 (mode
& FMODE_NDELAY
) != 0);
1575 if (is_sed_ioctl(cmd
))
1576 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1577 return scsi_ioctl(sdp
, disk
, mode
, cmd
, p
);
1580 static void set_media_not_present(struct scsi_disk
*sdkp
)
1582 if (sdkp
->media_present
)
1583 sdkp
->device
->changed
= 1;
1585 if (sdkp
->device
->removable
) {
1586 sdkp
->media_present
= 0;
1591 static int media_not_present(struct scsi_disk
*sdkp
,
1592 struct scsi_sense_hdr
*sshdr
)
1594 if (!scsi_sense_valid(sshdr
))
1597 /* not invoked for commands that could return deferred errors */
1598 switch (sshdr
->sense_key
) {
1599 case UNIT_ATTENTION
:
1601 /* medium not present */
1602 if (sshdr
->asc
== 0x3A) {
1603 set_media_not_present(sdkp
);
1611 * sd_check_events - check media events
1612 * @disk: kernel device descriptor
1613 * @clearing: disk events currently being cleared
1615 * Returns mask of DISK_EVENT_*.
1617 * Note: this function is invoked from the block subsystem.
1619 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1621 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1622 struct scsi_device
*sdp
;
1630 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1633 * If the device is offline, don't send any commands - just pretend as
1634 * if the command failed. If the device ever comes back online, we
1635 * can deal with it then. It is only because of unrecoverable errors
1636 * that we would ever take a device offline in the first place.
1638 if (!scsi_device_online(sdp
)) {
1639 set_media_not_present(sdkp
);
1644 * Using TEST_UNIT_READY enables differentiation between drive with
1645 * no cartridge loaded - NOT READY, drive with changed cartridge -
1646 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1648 * Drives that auto spin down. eg iomega jaz 1G, will be started
1649 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1650 * sd_revalidate() is called.
1652 if (scsi_block_when_processing_errors(sdp
)) {
1653 struct scsi_sense_hdr sshdr
= { 0, };
1655 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, sdkp
->max_retries
,
1658 /* failed to execute TUR, assume media not present */
1659 if (retval
< 0 || host_byte(retval
)) {
1660 set_media_not_present(sdkp
);
1664 if (media_not_present(sdkp
, &sshdr
))
1669 * For removable scsi disk we have to recognise the presence
1670 * of a disk in the drive.
1672 if (!sdkp
->media_present
)
1674 sdkp
->media_present
= 1;
1677 * sdp->changed is set under the following conditions:
1679 * Medium present state has changed in either direction.
1680 * Device has indicated UNIT_ATTENTION.
1682 disk_changed
= sdp
->changed
;
1684 scsi_disk_put(sdkp
);
1685 return disk_changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1688 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1691 struct scsi_device
*sdp
= sdkp
->device
;
1692 const int timeout
= sdp
->request_queue
->rq_timeout
1693 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1694 struct scsi_sense_hdr my_sshdr
;
1696 if (!scsi_device_online(sdp
))
1699 /* caller might not be interested in sense, but we need it */
1703 for (retries
= 3; retries
> 0; --retries
) {
1704 unsigned char cmd
[10] = { 0 };
1706 cmd
[0] = SYNCHRONIZE_CACHE
;
1708 * Leave the rest of the command zero to indicate
1711 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1712 timeout
, sdkp
->max_retries
, 0, RQF_PM
, NULL
);
1718 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1723 if (scsi_status_is_check_condition(res
) &&
1724 scsi_sense_valid(sshdr
)) {
1725 sd_print_sense_hdr(sdkp
, sshdr
);
1727 /* we need to evaluate the error return */
1728 if (sshdr
->asc
== 0x3a || /* medium not present */
1729 sshdr
->asc
== 0x20 || /* invalid command */
1730 (sshdr
->asc
== 0x74 && sshdr
->ascq
== 0x71)) /* drive is password locked */
1731 /* this is no error here */
1735 switch (host_byte(res
)) {
1736 /* ignore errors due to racing a disconnection */
1737 case DID_BAD_TARGET
:
1738 case DID_NO_CONNECT
:
1740 /* signal the upper layer it might try again */
1744 case DID_SOFT_ERROR
:
1753 static void sd_rescan(struct device
*dev
)
1755 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1757 sd_revalidate_disk(sdkp
->disk
);
1760 static char sd_pr_type(enum pr_type type
)
1763 case PR_WRITE_EXCLUSIVE
:
1765 case PR_EXCLUSIVE_ACCESS
:
1767 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1769 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1771 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1773 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1780 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1781 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1783 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1784 struct scsi_device
*sdev
= sdkp
->device
;
1785 struct scsi_sense_hdr sshdr
;
1787 u8 cmd
[16] = { 0, };
1788 u8 data
[24] = { 0, };
1790 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1793 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1795 put_unaligned_be64(key
, &data
[0]);
1796 put_unaligned_be64(sa_key
, &data
[8]);
1799 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1800 &sshdr
, SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
1802 if (scsi_status_is_check_condition(result
) &&
1803 scsi_sense_valid(&sshdr
)) {
1804 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1805 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1811 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1814 if (flags
& ~PR_FL_IGNORE_KEY
)
1816 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1817 old_key
, new_key
, 0,
1818 (1 << 0) /* APTPL */);
1821 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1826 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1829 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1831 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1834 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1835 enum pr_type type
, bool abort
)
1837 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1838 sd_pr_type(type
), 0);
1841 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1843 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1846 static const struct pr_ops sd_pr_ops
= {
1847 .pr_register
= sd_pr_register
,
1848 .pr_reserve
= sd_pr_reserve
,
1849 .pr_release
= sd_pr_release
,
1850 .pr_preempt
= sd_pr_preempt
,
1851 .pr_clear
= sd_pr_clear
,
1854 static const struct block_device_operations sd_fops
= {
1855 .owner
= THIS_MODULE
,
1857 .release
= sd_release
,
1859 .getgeo
= sd_getgeo
,
1860 .compat_ioctl
= blkdev_compat_ptr_ioctl
,
1861 .check_events
= sd_check_events
,
1862 .unlock_native_capacity
= sd_unlock_native_capacity
,
1863 .report_zones
= sd_zbc_report_zones
,
1864 .pr_ops
= &sd_pr_ops
,
1868 * sd_eh_reset - reset error handling callback
1869 * @scmd: sd-issued command that has failed
1871 * This function is called by the SCSI midlayer before starting
1872 * SCSI EH. When counting medium access failures we have to be
1873 * careful to register it only only once per device and SCSI EH run;
1874 * there might be several timed out commands which will cause the
1875 * 'max_medium_access_timeouts' counter to trigger after the first
1876 * SCSI EH run already and set the device to offline.
1877 * So this function resets the internal counter before starting SCSI EH.
1879 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1881 struct scsi_disk
*sdkp
= scsi_disk(scsi_cmd_to_rq(scmd
)->rq_disk
);
1883 /* New SCSI EH run, reset gate variable */
1884 sdkp
->ignore_medium_access_errors
= false;
1888 * sd_eh_action - error handling callback
1889 * @scmd: sd-issued command that has failed
1890 * @eh_disp: The recovery disposition suggested by the midlayer
1892 * This function is called by the SCSI midlayer upon completion of an
1893 * error test command (currently TEST UNIT READY). The result of sending
1894 * the eh command is passed in eh_disp. We're looking for devices that
1895 * fail medium access commands but are OK with non access commands like
1896 * test unit ready (so wrongly see the device as having a successful
1899 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1901 struct scsi_disk
*sdkp
= scsi_disk(scsi_cmd_to_rq(scmd
)->rq_disk
);
1902 struct scsi_device
*sdev
= scmd
->device
;
1904 if (!scsi_device_online(sdev
) ||
1905 !scsi_medium_access_command(scmd
) ||
1906 host_byte(scmd
->result
) != DID_TIME_OUT
||
1911 * The device has timed out executing a medium access command.
1912 * However, the TEST UNIT READY command sent during error
1913 * handling completed successfully. Either the device is in the
1914 * process of recovering or has it suffered an internal failure
1915 * that prevents access to the storage medium.
1917 if (!sdkp
->ignore_medium_access_errors
) {
1918 sdkp
->medium_access_timed_out
++;
1919 sdkp
->ignore_medium_access_errors
= true;
1923 * If the device keeps failing read/write commands but TEST UNIT
1924 * READY always completes successfully we assume that medium
1925 * access is no longer possible and take the device offline.
1927 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1928 scmd_printk(KERN_ERR
, scmd
,
1929 "Medium access timeout failure. Offlining disk!\n");
1930 mutex_lock(&sdev
->state_mutex
);
1931 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1932 mutex_unlock(&sdev
->state_mutex
);
1940 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1942 struct request
*req
= scsi_cmd_to_rq(scmd
);
1943 struct scsi_device
*sdev
= scmd
->device
;
1944 unsigned int transferred
, good_bytes
;
1945 u64 start_lba
, end_lba
, bad_lba
;
1948 * Some commands have a payload smaller than the device logical
1949 * block size (e.g. INQUIRY on a 4K disk).
1951 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1954 /* Check if we have a 'bad_lba' information */
1955 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1956 SCSI_SENSE_BUFFERSIZE
,
1961 * If the bad lba was reported incorrectly, we have no idea where
1964 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1965 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1966 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1970 * resid is optional but mostly filled in. When it's unused,
1971 * its value is zero, so we assume the whole buffer transferred
1973 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1975 /* This computation should always be done in terms of the
1976 * resolution of the device's medium.
1978 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1980 return min(good_bytes
, transferred
);
1984 * sd_done - bottom half handler: called when the lower level
1985 * driver has completed (successfully or otherwise) a scsi command.
1986 * @SCpnt: mid-level's per command structure.
1988 * Note: potentially run from within an ISR. Must not block.
1990 static int sd_done(struct scsi_cmnd
*SCpnt
)
1992 int result
= SCpnt
->result
;
1993 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1994 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1996 struct scsi_sense_hdr sshdr
;
1997 struct request
*req
= scsi_cmd_to_rq(SCpnt
);
1998 struct scsi_disk
*sdkp
= scsi_disk(req
->rq_disk
);
1999 int sense_valid
= 0;
2000 int sense_deferred
= 0;
2002 switch (req_op(req
)) {
2003 case REQ_OP_DISCARD
:
2004 case REQ_OP_WRITE_ZEROES
:
2005 case REQ_OP_WRITE_SAME
:
2006 case REQ_OP_ZONE_RESET
:
2007 case REQ_OP_ZONE_RESET_ALL
:
2008 case REQ_OP_ZONE_OPEN
:
2009 case REQ_OP_ZONE_CLOSE
:
2010 case REQ_OP_ZONE_FINISH
:
2012 good_bytes
= blk_rq_bytes(req
);
2013 scsi_set_resid(SCpnt
, 0);
2016 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
2021 * In case of bogus fw or device, we could end up having
2022 * an unaligned partial completion. Check this here and force
2025 resid
= scsi_get_resid(SCpnt
);
2026 if (resid
& (sector_size
- 1)) {
2027 sd_printk(KERN_INFO
, sdkp
,
2028 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2029 resid
, sector_size
);
2030 scsi_print_command(SCpnt
);
2031 resid
= min(scsi_bufflen(SCpnt
),
2032 round_up(resid
, sector_size
));
2033 scsi_set_resid(SCpnt
, resid
);
2038 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
2040 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
2042 sdkp
->medium_access_timed_out
= 0;
2044 if (!scsi_status_is_check_condition(result
) &&
2045 (!sense_valid
|| sense_deferred
))
2048 switch (sshdr
.sense_key
) {
2049 case HARDWARE_ERROR
:
2051 good_bytes
= sd_completed_bytes(SCpnt
);
2053 case RECOVERED_ERROR
:
2054 good_bytes
= scsi_bufflen(SCpnt
);
2057 /* This indicates a false check condition, so ignore it. An
2058 * unknown amount of data was transferred so treat it as an
2062 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2064 case ABORTED_COMMAND
:
2065 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2066 good_bytes
= sd_completed_bytes(SCpnt
);
2068 case ILLEGAL_REQUEST
:
2069 switch (sshdr
.asc
) {
2070 case 0x10: /* DIX: Host detected corruption */
2071 good_bytes
= sd_completed_bytes(SCpnt
);
2073 case 0x20: /* INVALID COMMAND OPCODE */
2074 case 0x24: /* INVALID FIELD IN CDB */
2075 switch (SCpnt
->cmnd
[0]) {
2077 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2081 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2082 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2084 sdkp
->device
->no_write_same
= 1;
2085 sd_config_write_same(sdkp
);
2086 req
->rq_flags
|= RQF_QUIET
;
2097 if (sd_is_zoned(sdkp
))
2098 good_bytes
= sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2100 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2101 "sd_done: completed %d of %d bytes\n",
2102 good_bytes
, scsi_bufflen(SCpnt
)));
2108 * spinup disk - called only in sd_revalidate_disk()
2111 sd_spinup_disk(struct scsi_disk
*sdkp
)
2113 unsigned char cmd
[10];
2114 unsigned long spintime_expire
= 0;
2115 int retries
, spintime
;
2116 unsigned int the_result
;
2117 struct scsi_sense_hdr sshdr
;
2118 int sense_valid
= 0;
2122 /* Spin up drives, as required. Only do this at boot time */
2123 /* Spinup needs to be done for module loads too. */
2128 bool media_was_present
= sdkp
->media_present
;
2130 cmd
[0] = TEST_UNIT_READY
;
2131 memset((void *) &cmd
[1], 0, 9);
2133 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2136 sdkp
->max_retries
, NULL
);
2139 * If the drive has indicated to us that it
2140 * doesn't have any media in it, don't bother
2141 * with any more polling.
2143 if (media_not_present(sdkp
, &sshdr
)) {
2144 if (media_was_present
)
2145 sd_printk(KERN_NOTICE
, sdkp
, "Media removed, stopped polling\n");
2150 sense_valid
= scsi_sense_valid(&sshdr
);
2152 } while (retries
< 3 &&
2153 (!scsi_status_is_good(the_result
) ||
2154 (scsi_status_is_check_condition(the_result
) &&
2155 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2157 if (!scsi_status_is_check_condition(the_result
)) {
2158 /* no sense, TUR either succeeded or failed
2159 * with a status error */
2160 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2161 sd_print_result(sdkp
, "Test Unit Ready failed",
2168 * The device does not want the automatic start to be issued.
2170 if (sdkp
->device
->no_start_on_add
)
2173 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2174 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2175 break; /* manual intervention required */
2176 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2177 break; /* standby */
2178 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2179 break; /* unavailable */
2180 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2181 break; /* sanitize in progress */
2183 * Issue command to spin up drive when not ready
2186 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2187 cmd
[0] = START_STOP
;
2188 cmd
[1] = 1; /* Return immediately */
2189 memset((void *) &cmd
[2], 0, 8);
2190 cmd
[4] = 1; /* Start spin cycle */
2191 if (sdkp
->device
->start_stop_pwr_cond
)
2193 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2195 SD_TIMEOUT
, sdkp
->max_retries
,
2197 spintime_expire
= jiffies
+ 100 * HZ
;
2200 /* Wait 1 second for next try */
2202 printk(KERN_CONT
".");
2205 * Wait for USB flash devices with slow firmware.
2206 * Yes, this sense key/ASC combination shouldn't
2207 * occur here. It's characteristic of these devices.
2209 } else if (sense_valid
&&
2210 sshdr
.sense_key
== UNIT_ATTENTION
&&
2211 sshdr
.asc
== 0x28) {
2213 spintime_expire
= jiffies
+ 5 * HZ
;
2216 /* Wait 1 second for next try */
2219 /* we don't understand the sense code, so it's
2220 * probably pointless to loop */
2222 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2223 sd_print_sense_hdr(sdkp
, &sshdr
);
2228 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2231 if (scsi_status_is_good(the_result
))
2232 printk(KERN_CONT
"ready\n");
2234 printk(KERN_CONT
"not responding...\n");
2239 * Determine whether disk supports Data Integrity Field.
2241 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2243 struct scsi_device
*sdp
= sdkp
->device
;
2247 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0) {
2248 sdkp
->protection_type
= 0;
2252 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2254 if (type
> T10_PI_TYPE3_PROTECTION
)
2256 else if (scsi_host_dif_capable(sdp
->host
, type
))
2259 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2262 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2263 " protection type %u. Disabling disk!\n",
2267 sd_printk(KERN_NOTICE
, sdkp
,
2268 "Enabling DIF Type %u protection\n", type
);
2271 sd_printk(KERN_NOTICE
, sdkp
,
2272 "Disabling DIF Type %u protection\n", type
);
2276 sdkp
->protection_type
= type
;
2281 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2282 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2286 sd_print_sense_hdr(sdkp
, sshdr
);
2288 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2291 * Set dirty bit for removable devices if not ready -
2292 * sometimes drives will not report this properly.
2294 if (sdp
->removable
&&
2295 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2296 set_media_not_present(sdkp
);
2299 * We used to set media_present to 0 here to indicate no media
2300 * in the drive, but some drives fail read capacity even with
2301 * media present, so we can't do that.
2303 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2307 #if RC16_LEN > SD_BUF_SIZE
2308 #error RC16_LEN must not be more than SD_BUF_SIZE
2311 #define READ_CAPACITY_RETRIES_ON_RESET 10
2313 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2314 unsigned char *buffer
)
2316 unsigned char cmd
[16];
2317 struct scsi_sense_hdr sshdr
;
2318 int sense_valid
= 0;
2320 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2321 unsigned int alignment
;
2322 unsigned long long lba
;
2323 unsigned sector_size
;
2325 if (sdp
->no_read_capacity_16
)
2330 cmd
[0] = SERVICE_ACTION_IN_16
;
2331 cmd
[1] = SAI_READ_CAPACITY_16
;
2333 memset(buffer
, 0, RC16_LEN
);
2335 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2336 buffer
, RC16_LEN
, &sshdr
,
2337 SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
2339 if (media_not_present(sdkp
, &sshdr
))
2342 if (the_result
> 0) {
2343 sense_valid
= scsi_sense_valid(&sshdr
);
2345 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2346 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2348 /* Invalid Command Operation Code or
2349 * Invalid Field in CDB, just retry
2350 * silently with RC10 */
2353 sshdr
.sense_key
== UNIT_ATTENTION
&&
2354 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2355 /* Device reset might occur several times,
2356 * give it one more chance */
2357 if (--reset_retries
> 0)
2362 } while (the_result
&& retries
);
2365 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2366 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2370 sector_size
= get_unaligned_be32(&buffer
[8]);
2371 lba
= get_unaligned_be64(&buffer
[0]);
2373 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2378 /* Logical blocks per physical block exponent */
2379 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2382 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2384 /* Lowest aligned logical block */
2385 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2386 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2387 if (alignment
&& sdkp
->first_scan
)
2388 sd_printk(KERN_NOTICE
, sdkp
,
2389 "physical block alignment offset: %u\n", alignment
);
2391 if (buffer
[14] & 0x80) { /* LBPME */
2394 if (buffer
[14] & 0x40) /* LBPRZ */
2397 sd_config_discard(sdkp
, SD_LBP_WS16
);
2400 sdkp
->capacity
= lba
+ 1;
2404 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2405 unsigned char *buffer
)
2407 unsigned char cmd
[16];
2408 struct scsi_sense_hdr sshdr
;
2409 int sense_valid
= 0;
2411 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2413 unsigned sector_size
;
2416 cmd
[0] = READ_CAPACITY
;
2417 memset(&cmd
[1], 0, 9);
2418 memset(buffer
, 0, 8);
2420 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2422 SD_TIMEOUT
, sdkp
->max_retries
, NULL
);
2424 if (media_not_present(sdkp
, &sshdr
))
2427 if (the_result
> 0) {
2428 sense_valid
= scsi_sense_valid(&sshdr
);
2430 sshdr
.sense_key
== UNIT_ATTENTION
&&
2431 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2432 /* Device reset might occur several times,
2433 * give it one more chance */
2434 if (--reset_retries
> 0)
2439 } while (the_result
&& retries
);
2442 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2443 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2447 sector_size
= get_unaligned_be32(&buffer
[4]);
2448 lba
= get_unaligned_be32(&buffer
[0]);
2450 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2451 /* Some buggy (usb cardreader) devices return an lba of
2452 0xffffffff when the want to report a size of 0 (with
2453 which they really mean no media is present) */
2455 sdkp
->physical_block_size
= sector_size
;
2459 sdkp
->capacity
= lba
+ 1;
2460 sdkp
->physical_block_size
= sector_size
;
2464 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2466 if (sdp
->host
->max_cmd_len
< 16)
2468 if (sdp
->try_rc_10_first
)
2470 if (sdp
->scsi_level
> SCSI_SPC_2
)
2472 if (scsi_device_protection(sdp
))
2478 * read disk capacity
2481 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2484 struct scsi_device
*sdp
= sdkp
->device
;
2486 if (sd_try_rc16_first(sdp
)) {
2487 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2488 if (sector_size
== -EOVERFLOW
)
2490 if (sector_size
== -ENODEV
)
2492 if (sector_size
< 0)
2493 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2494 if (sector_size
< 0)
2497 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2498 if (sector_size
== -EOVERFLOW
)
2500 if (sector_size
< 0)
2502 if ((sizeof(sdkp
->capacity
) > 4) &&
2503 (sdkp
->capacity
> 0xffffffffULL
)) {
2504 int old_sector_size
= sector_size
;
2505 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2506 "Trying to use READ CAPACITY(16).\n");
2507 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2508 if (sector_size
< 0) {
2509 sd_printk(KERN_NOTICE
, sdkp
,
2510 "Using 0xffffffff as device size\n");
2511 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2512 sector_size
= old_sector_size
;
2515 /* Remember that READ CAPACITY(16) succeeded */
2516 sdp
->try_rc_10_first
= 0;
2520 /* Some devices are known to return the total number of blocks,
2521 * not the highest block number. Some devices have versions
2522 * which do this and others which do not. Some devices we might
2523 * suspect of doing this but we don't know for certain.
2525 * If we know the reported capacity is wrong, decrement it. If
2526 * we can only guess, then assume the number of blocks is even
2527 * (usually true but not always) and err on the side of lowering
2530 if (sdp
->fix_capacity
||
2531 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2532 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2533 "from its reported value: %llu\n",
2534 (unsigned long long) sdkp
->capacity
);
2539 if (sector_size
== 0) {
2541 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2545 if (sector_size
!= 512 &&
2546 sector_size
!= 1024 &&
2547 sector_size
!= 2048 &&
2548 sector_size
!= 4096) {
2549 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2552 * The user might want to re-format the drive with
2553 * a supported sectorsize. Once this happens, it
2554 * would be relatively trivial to set the thing up.
2555 * For this reason, we leave the thing in the table.
2559 * set a bogus sector size so the normal read/write
2560 * logic in the block layer will eventually refuse any
2561 * request on this device without tripping over power
2562 * of two sector size assumptions
2566 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2567 blk_queue_physical_block_size(sdp
->request_queue
,
2568 sdkp
->physical_block_size
);
2569 sdkp
->device
->sector_size
= sector_size
;
2571 if (sdkp
->capacity
> 0xffffffff)
2572 sdp
->use_16_for_rw
= 1;
2577 * Print disk capacity
2580 sd_print_capacity(struct scsi_disk
*sdkp
,
2581 sector_t old_capacity
)
2583 int sector_size
= sdkp
->device
->sector_size
;
2584 char cap_str_2
[10], cap_str_10
[10];
2586 if (!sdkp
->first_scan
&& old_capacity
== sdkp
->capacity
)
2589 string_get_size(sdkp
->capacity
, sector_size
,
2590 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2591 string_get_size(sdkp
->capacity
, sector_size
,
2592 STRING_UNITS_10
, cap_str_10
, sizeof(cap_str_10
));
2594 sd_printk(KERN_NOTICE
, sdkp
,
2595 "%llu %d-byte logical blocks: (%s/%s)\n",
2596 (unsigned long long)sdkp
->capacity
,
2597 sector_size
, cap_str_10
, cap_str_2
);
2599 if (sdkp
->physical_block_size
!= sector_size
)
2600 sd_printk(KERN_NOTICE
, sdkp
,
2601 "%u-byte physical blocks\n",
2602 sdkp
->physical_block_size
);
2605 /* called with buffer of length 512 */
2607 sd_do_mode_sense(struct scsi_disk
*sdkp
, int dbd
, int modepage
,
2608 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2609 struct scsi_sense_hdr
*sshdr
)
2612 * If we must use MODE SENSE(10), make sure that the buffer length
2613 * is at least 8 bytes so that the mode sense header fits.
2615 if (sdkp
->device
->use_10_for_ms
&& len
< 8)
2618 return scsi_mode_sense(sdkp
->device
, dbd
, modepage
, buffer
, len
,
2619 SD_TIMEOUT
, sdkp
->max_retries
, data
,
2624 * read write protect setting, if possible - called only in sd_revalidate_disk()
2625 * called with buffer of length SD_BUF_SIZE
2628 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2631 struct scsi_device
*sdp
= sdkp
->device
;
2632 struct scsi_mode_data data
;
2633 int old_wp
= sdkp
->write_prot
;
2635 set_disk_ro(sdkp
->disk
, 0);
2636 if (sdp
->skip_ms_page_3f
) {
2637 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2641 if (sdp
->use_192_bytes_for_3f
) {
2642 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2645 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2646 * We have to start carefully: some devices hang if we ask
2647 * for more than is available.
2649 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2652 * Second attempt: ask for page 0 When only page 0 is
2653 * implemented, a request for page 3F may return Sense Key
2654 * 5: Illegal Request, Sense Code 24: Invalid field in
2658 res
= sd_do_mode_sense(sdkp
, 0, 0, buffer
, 4, &data
, NULL
);
2661 * Third attempt: ask 255 bytes, as we did earlier.
2664 res
= sd_do_mode_sense(sdkp
, 0, 0x3F, buffer
, 255,
2669 sd_first_printk(KERN_WARNING
, sdkp
,
2670 "Test WP failed, assume Write Enabled\n");
2672 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2673 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2674 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2675 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2676 sdkp
->write_prot
? "on" : "off");
2677 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2683 * sd_read_cache_type - called only from sd_revalidate_disk()
2684 * called with buffer of length SD_BUF_SIZE
2687 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2690 struct scsi_device
*sdp
= sdkp
->device
;
2695 struct scsi_mode_data data
;
2696 struct scsi_sense_hdr sshdr
;
2697 int old_wce
= sdkp
->WCE
;
2698 int old_rcd
= sdkp
->RCD
;
2699 int old_dpofua
= sdkp
->DPOFUA
;
2702 if (sdkp
->cache_override
)
2706 if (sdp
->skip_ms_page_8
) {
2707 if (sdp
->type
== TYPE_RBC
)
2710 if (sdp
->skip_ms_page_3f
)
2713 if (sdp
->use_192_bytes_for_3f
)
2717 } else if (sdp
->type
== TYPE_RBC
) {
2725 /* cautiously ask */
2726 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, first_len
,
2732 if (!data
.header_length
) {
2735 sd_first_printk(KERN_ERR
, sdkp
,
2736 "Missing header in MODE_SENSE response\n");
2739 /* that went OK, now ask for the proper length */
2743 * We're only interested in the first three bytes, actually.
2744 * But the data cache page is defined for the first 20.
2748 else if (len
> SD_BUF_SIZE
) {
2749 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2750 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2753 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2757 if (len
> first_len
)
2758 res
= sd_do_mode_sense(sdkp
, dbd
, modepage
, buffer
, len
,
2762 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2764 while (offset
< len
) {
2765 u8 page_code
= buffer
[offset
] & 0x3F;
2766 u8 spf
= buffer
[offset
] & 0x40;
2768 if (page_code
== 8 || page_code
== 6) {
2769 /* We're interested only in the first 3 bytes.
2771 if (len
- offset
<= 2) {
2772 sd_first_printk(KERN_ERR
, sdkp
,
2773 "Incomplete mode parameter "
2777 modepage
= page_code
;
2781 /* Go to the next page */
2782 if (spf
&& len
- offset
> 3)
2783 offset
+= 4 + (buffer
[offset
+2] << 8) +
2785 else if (!spf
&& len
- offset
> 1)
2786 offset
+= 2 + buffer
[offset
+1];
2788 sd_first_printk(KERN_ERR
, sdkp
,
2790 "parameter data\n");
2796 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2800 if (modepage
== 8) {
2801 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2802 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2804 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2808 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2809 if (sdp
->broken_fua
) {
2810 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2812 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2813 !sdkp
->device
->use_16_for_rw
) {
2814 sd_first_printk(KERN_NOTICE
, sdkp
,
2815 "Uses READ/WRITE(6), disabling FUA\n");
2819 /* No cache flush allowed for write protected devices */
2820 if (sdkp
->WCE
&& sdkp
->write_prot
)
2823 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2824 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2825 sd_printk(KERN_NOTICE
, sdkp
,
2826 "Write cache: %s, read cache: %s, %s\n",
2827 sdkp
->WCE
? "enabled" : "disabled",
2828 sdkp
->RCD
? "disabled" : "enabled",
2829 sdkp
->DPOFUA
? "supports DPO and FUA"
2830 : "doesn't support DPO or FUA");
2836 if (scsi_sense_valid(&sshdr
) &&
2837 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2838 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2839 /* Invalid field in CDB */
2840 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2842 sd_first_printk(KERN_ERR
, sdkp
,
2843 "Asking for cache data failed\n");
2846 if (sdp
->wce_default_on
) {
2847 sd_first_printk(KERN_NOTICE
, sdkp
,
2848 "Assuming drive cache: write back\n");
2851 sd_first_printk(KERN_ERR
, sdkp
,
2852 "Assuming drive cache: write through\n");
2860 * The ATO bit indicates whether the DIF application tag is available
2861 * for use by the operating system.
2863 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2866 struct scsi_device
*sdp
= sdkp
->device
;
2867 struct scsi_mode_data data
;
2868 struct scsi_sense_hdr sshdr
;
2870 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2873 if (sdkp
->protection_type
== 0)
2876 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2877 sdkp
->max_retries
, &data
, &sshdr
);
2879 if (res
< 0 || !data
.header_length
||
2881 sd_first_printk(KERN_WARNING
, sdkp
,
2882 "getting Control mode page failed, assume no ATO\n");
2884 if (scsi_sense_valid(&sshdr
))
2885 sd_print_sense_hdr(sdkp
, &sshdr
);
2890 offset
= data
.header_length
+ data
.block_descriptor_length
;
2892 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2893 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2897 if ((buffer
[offset
+ 5] & 0x80) == 0)
2906 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2907 * @sdkp: disk to query
2909 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2911 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2912 const int vpd_len
= 64;
2913 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2916 /* Block Limits VPD */
2917 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2920 blk_queue_io_min(sdkp
->disk
->queue
,
2921 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2923 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2924 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2926 if (buffer
[3] == 0x3c) {
2927 unsigned int lba_count
, desc_count
;
2929 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2934 lba_count
= get_unaligned_be32(&buffer
[20]);
2935 desc_count
= get_unaligned_be32(&buffer
[24]);
2937 if (lba_count
&& desc_count
)
2938 sdkp
->max_unmap_blocks
= lba_count
;
2940 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2942 if (buffer
[32] & 0x80)
2943 sdkp
->unmap_alignment
=
2944 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2946 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2948 if (sdkp
->max_unmap_blocks
)
2949 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2951 sd_config_discard(sdkp
, SD_LBP_WS16
);
2953 } else { /* LBP VPD page tells us what to use */
2954 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2955 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2956 else if (sdkp
->lbpws
)
2957 sd_config_discard(sdkp
, SD_LBP_WS16
);
2958 else if (sdkp
->lbpws10
)
2959 sd_config_discard(sdkp
, SD_LBP_WS10
);
2961 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2970 * sd_read_block_characteristics - Query block dev. characteristics
2971 * @sdkp: disk to query
2973 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2975 struct request_queue
*q
= sdkp
->disk
->queue
;
2976 unsigned char *buffer
;
2978 const int vpd_len
= 64;
2980 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2983 /* Block Device Characteristics VPD */
2984 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2987 rot
= get_unaligned_be16(&buffer
[4]);
2990 blk_queue_flag_set(QUEUE_FLAG_NONROT
, q
);
2991 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM
, q
);
2994 if (sdkp
->device
->type
== TYPE_ZBC
) {
2996 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_HM
);
2998 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2999 if (sdkp
->zoned
== 1) {
3001 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_HA
);
3003 /* Regular disk or drive managed disk */
3004 blk_queue_set_zoned(sdkp
->disk
, BLK_ZONED_NONE
);
3008 if (!sdkp
->first_scan
)
3011 if (blk_queue_is_zoned(q
)) {
3012 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
3013 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
3015 if (sdkp
->zoned
== 1)
3016 sd_printk(KERN_NOTICE
, sdkp
,
3017 "Host-aware SMR disk used as regular disk\n");
3018 else if (sdkp
->zoned
== 2)
3019 sd_printk(KERN_NOTICE
, sdkp
,
3020 "Drive-managed SMR disk\n");
3028 * sd_read_block_provisioning - Query provisioning VPD page
3029 * @sdkp: disk to query
3031 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
3033 unsigned char *buffer
;
3034 const int vpd_len
= 8;
3036 if (sdkp
->lbpme
== 0)
3039 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
3041 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
3045 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
3046 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3047 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
3053 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3055 struct scsi_device
*sdev
= sdkp
->device
;
3057 if (sdev
->host
->no_write_same
) {
3058 sdev
->no_write_same
= 1;
3063 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
3064 /* too large values might cause issues with arcmsr */
3065 int vpd_buf_len
= 64;
3067 sdev
->no_report_opcodes
= 1;
3069 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3070 * CODES is unsupported and the device has an ATA
3071 * Information VPD page (SAT).
3073 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3074 sdev
->no_write_same
= 1;
3077 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3080 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3084 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3086 struct scsi_device
*sdev
= sdkp
->device
;
3088 if (!sdev
->security_supported
)
3091 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3092 SECURITY_PROTOCOL_IN
) == 1 &&
3093 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3094 SECURITY_PROTOCOL_OUT
) == 1)
3099 * Determine the device's preferred I/O size for reads and writes
3100 * unless the reported value is unreasonably small, large, not a
3101 * multiple of the physical block size, or simply garbage.
3103 static bool sd_validate_opt_xfer_size(struct scsi_disk
*sdkp
,
3104 unsigned int dev_max
)
3106 struct scsi_device
*sdp
= sdkp
->device
;
3107 unsigned int opt_xfer_bytes
=
3108 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3110 if (sdkp
->opt_xfer_blocks
== 0)
3113 if (sdkp
->opt_xfer_blocks
> dev_max
) {
3114 sd_first_printk(KERN_WARNING
, sdkp
,
3115 "Optimal transfer size %u logical blocks " \
3116 "> dev_max (%u logical blocks)\n",
3117 sdkp
->opt_xfer_blocks
, dev_max
);
3121 if (sdkp
->opt_xfer_blocks
> SD_DEF_XFER_BLOCKS
) {
3122 sd_first_printk(KERN_WARNING
, sdkp
,
3123 "Optimal transfer size %u logical blocks " \
3124 "> sd driver limit (%u logical blocks)\n",
3125 sdkp
->opt_xfer_blocks
, SD_DEF_XFER_BLOCKS
);
3129 if (opt_xfer_bytes
< PAGE_SIZE
) {
3130 sd_first_printk(KERN_WARNING
, sdkp
,
3131 "Optimal transfer size %u bytes < " \
3132 "PAGE_SIZE (%u bytes)\n",
3133 opt_xfer_bytes
, (unsigned int)PAGE_SIZE
);
3137 if (opt_xfer_bytes
& (sdkp
->physical_block_size
- 1)) {
3138 sd_first_printk(KERN_WARNING
, sdkp
,
3139 "Optimal transfer size %u bytes not a " \
3140 "multiple of physical block size (%u bytes)\n",
3141 opt_xfer_bytes
, sdkp
->physical_block_size
);
3145 sd_first_printk(KERN_INFO
, sdkp
, "Optimal transfer size %u bytes\n",
3151 * sd_revalidate_disk - called the first time a new disk is seen,
3152 * performs disk spin up, read_capacity, etc.
3153 * @disk: struct gendisk we care about
3155 static int sd_revalidate_disk(struct gendisk
*disk
)
3157 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3158 struct scsi_device
*sdp
= sdkp
->device
;
3159 struct request_queue
*q
= sdkp
->disk
->queue
;
3160 sector_t old_capacity
= sdkp
->capacity
;
3161 unsigned char *buffer
;
3162 unsigned int dev_max
, rw_max
;
3164 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3165 "sd_revalidate_disk\n"));
3168 * If the device is offline, don't try and read capacity or any
3169 * of the other niceties.
3171 if (!scsi_device_online(sdp
))
3174 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3176 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3177 "allocation failure.\n");
3181 sd_spinup_disk(sdkp
);
3184 * Without media there is no reason to ask; moreover, some devices
3185 * react badly if we do.
3187 if (sdkp
->media_present
) {
3188 sd_read_capacity(sdkp
, buffer
);
3191 * set the default to rotational. All non-rotational devices
3192 * support the block characteristics VPD page, which will
3193 * cause this to be updated correctly and any device which
3194 * doesn't support it should be treated as rotational.
3196 blk_queue_flag_clear(QUEUE_FLAG_NONROT
, q
);
3197 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM
, q
);
3199 if (scsi_device_supports_vpd(sdp
)) {
3200 sd_read_block_provisioning(sdkp
);
3201 sd_read_block_limits(sdkp
);
3202 sd_read_block_characteristics(sdkp
);
3203 sd_zbc_read_zones(sdkp
, buffer
);
3206 sd_print_capacity(sdkp
, old_capacity
);
3208 sd_read_write_protect_flag(sdkp
, buffer
);
3209 sd_read_cache_type(sdkp
, buffer
);
3210 sd_read_app_tag_own(sdkp
, buffer
);
3211 sd_read_write_same(sdkp
, buffer
);
3212 sd_read_security(sdkp
, buffer
);
3216 * We now have all cache related info, determine how we deal
3217 * with flush requests.
3219 sd_set_flush_flag(sdkp
);
3221 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3222 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3224 /* Some devices report a maximum block count for READ/WRITE requests. */
3225 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3226 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3228 if (sd_validate_opt_xfer_size(sdkp
, dev_max
)) {
3229 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3230 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3232 q
->limits
.io_opt
= 0;
3233 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3234 (sector_t
)BLK_DEF_MAX_SECTORS
);
3237 /* Do not exceed controller limit */
3238 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3241 * Only update max_sectors if previously unset or if the current value
3242 * exceeds the capabilities of the hardware.
3244 if (sdkp
->first_scan
||
3245 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3246 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3247 q
->limits
.max_sectors
= rw_max
;
3249 sdkp
->first_scan
= 0;
3251 set_capacity_and_notify(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3252 sd_config_write_same(sdkp
);
3256 * For a zoned drive, revalidating the zones can be done only once
3257 * the gendisk capacity is set. So if this fails, set back the gendisk
3260 if (sd_zbc_revalidate_zones(sdkp
))
3261 set_capacity_and_notify(disk
, 0);
3268 * sd_unlock_native_capacity - unlock native capacity
3269 * @disk: struct gendisk to set capacity for
3271 * Block layer calls this function if it detects that partitions
3272 * on @disk reach beyond the end of the device. If the SCSI host
3273 * implements ->unlock_native_capacity() method, it's invoked to
3274 * give it a chance to adjust the device capacity.
3277 * Defined by block layer. Might sleep.
3279 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3281 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3283 if (sdev
->host
->hostt
->unlock_native_capacity
)
3284 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3288 * sd_format_disk_name - format disk name
3289 * @prefix: name prefix - ie. "sd" for SCSI disks
3290 * @index: index of the disk to format name for
3291 * @buf: output buffer
3292 * @buflen: length of the output buffer
3294 * SCSI disk names starts at sda. The 26th device is sdz and the
3295 * 27th is sdaa. The last one for two lettered suffix is sdzz
3296 * which is followed by sdaaa.
3298 * This is basically 26 base counting with one extra 'nil' entry
3299 * at the beginning from the second digit on and can be
3300 * determined using similar method as 26 base conversion with the
3301 * index shifted -1 after each digit is computed.
3307 * 0 on success, -errno on failure.
3309 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3311 const int base
= 'z' - 'a' + 1;
3312 char *begin
= buf
+ strlen(prefix
);
3313 char *end
= buf
+ buflen
;
3323 *--p
= 'a' + (index
% unit
);
3324 index
= (index
/ unit
) - 1;
3325 } while (index
>= 0);
3327 memmove(begin
, p
, end
- p
);
3328 memcpy(buf
, prefix
, strlen(prefix
));
3334 * sd_probe - called during driver initialization and whenever a
3335 * new scsi device is attached to the system. It is called once
3336 * for each scsi device (not just disks) present.
3337 * @dev: pointer to device object
3339 * Returns 0 if successful (or not interested in this scsi device
3340 * (e.g. scanner)); 1 when there is an error.
3342 * Note: this function is invoked from the scsi mid-level.
3343 * This function sets up the mapping between a given
3344 * <host,channel,id,lun> (found in sdp) and new device name
3345 * (e.g. /dev/sda). More precisely it is the block device major
3346 * and minor number that is chosen here.
3348 * Assume sd_probe is not re-entrant (for time being)
3349 * Also think about sd_probe() and sd_remove() running coincidentally.
3351 static int sd_probe(struct device
*dev
)
3353 struct scsi_device
*sdp
= to_scsi_device(dev
);
3354 struct scsi_disk
*sdkp
;
3359 scsi_autopm_get_device(sdp
);
3361 if (sdp
->type
!= TYPE_DISK
&&
3362 sdp
->type
!= TYPE_ZBC
&&
3363 sdp
->type
!= TYPE_MOD
&&
3364 sdp
->type
!= TYPE_RBC
)
3367 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED
) && sdp
->type
== TYPE_ZBC
) {
3368 sdev_printk(KERN_WARNING
, sdp
,
3369 "Unsupported ZBC host-managed device.\n");
3373 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3377 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3381 gd
= __alloc_disk_node(sdp
->request_queue
, NUMA_NO_NODE
,
3382 &sd_bio_compl_lkclass
);
3386 index
= ida_alloc(&sd_index_ida
, GFP_KERNEL
);
3388 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3392 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3394 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3395 goto out_free_index
;
3399 sdkp
->driver
= &sd_template
;
3401 sdkp
->index
= index
;
3402 sdkp
->max_retries
= SD_MAX_RETRIES
;
3403 atomic_set(&sdkp
->openers
, 0);
3404 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3406 if (!sdp
->request_queue
->rq_timeout
) {
3407 if (sdp
->type
!= TYPE_MOD
)
3408 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3410 blk_queue_rq_timeout(sdp
->request_queue
,
3414 device_initialize(&sdkp
->dev
);
3415 sdkp
->dev
.parent
= get_device(dev
);
3416 sdkp
->dev
.class = &sd_disk_class
;
3417 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3419 error
= device_add(&sdkp
->dev
);
3421 put_device(&sdkp
->dev
);
3425 dev_set_drvdata(dev
, sdkp
);
3427 gd
->major
= sd_major((index
& 0xf0) >> 4);
3428 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3429 gd
->minors
= SD_MINORS
;
3431 gd
->fops
= &sd_fops
;
3432 gd
->private_data
= &sdkp
->driver
;
3434 /* defaults, until the device tells us otherwise */
3435 sdp
->sector_size
= 512;
3437 sdkp
->media_present
= 1;
3438 sdkp
->write_prot
= 0;
3439 sdkp
->cache_override
= 0;
3443 sdkp
->first_scan
= 1;
3444 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3446 sd_revalidate_disk(gd
);
3448 gd
->flags
= GENHD_FL_EXT_DEVT
;
3449 if (sdp
->removable
) {
3450 gd
->flags
|= GENHD_FL_REMOVABLE
;
3451 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3452 gd
->event_flags
= DISK_EVENT_FLAG_POLL
| DISK_EVENT_FLAG_UEVENT
;
3455 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3456 if (sdp
->rpm_autosuspend
) {
3457 pm_runtime_set_autosuspend_delay(dev
,
3458 sdp
->host
->hostt
->rpm_autosuspend_delay
);
3460 device_add_disk(dev
, gd
, NULL
);
3462 sd_dif_config_host(sdkp
);
3464 sd_revalidate_disk(gd
);
3466 if (sdkp
->security
) {
3467 sdkp
->opal_dev
= init_opal_dev(sdkp
, &sd_sec_submit
);
3469 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3472 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3473 sdp
->removable
? "removable " : "");
3474 scsi_autopm_put_device(sdp
);
3479 ida_free(&sd_index_ida
, index
);
3485 scsi_autopm_put_device(sdp
);
3490 * sd_remove - called whenever a scsi disk (previously recognized by
3491 * sd_probe) is detached from the system. It is called (potentially
3492 * multiple times) during sd module unload.
3493 * @dev: pointer to device object
3495 * Note: this function is invoked from the scsi mid-level.
3496 * This function potentially frees up a device name (e.g. /dev/sdc)
3497 * that could be re-used by a subsequent sd_probe().
3498 * This function is not called when the built-in sd driver is "exit-ed".
3500 static int sd_remove(struct device
*dev
)
3502 struct scsi_disk
*sdkp
;
3504 sdkp
= dev_get_drvdata(dev
);
3505 scsi_autopm_get_device(sdkp
->device
);
3507 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3508 device_del(&sdkp
->dev
);
3509 del_gendisk(sdkp
->disk
);
3512 free_opal_dev(sdkp
->opal_dev
);
3514 mutex_lock(&sd_ref_mutex
);
3515 dev_set_drvdata(dev
, NULL
);
3516 put_device(&sdkp
->dev
);
3517 mutex_unlock(&sd_ref_mutex
);
3523 * scsi_disk_release - Called to free the scsi_disk structure
3524 * @dev: pointer to embedded class device
3526 * sd_ref_mutex must be held entering this routine. Because it is
3527 * called on last put, you should always use the scsi_disk_get()
3528 * scsi_disk_put() helpers which manipulate the semaphore directly
3529 * and never do a direct put_device.
3531 static void scsi_disk_release(struct device
*dev
)
3533 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3534 struct gendisk
*disk
= sdkp
->disk
;
3535 struct request_queue
*q
= disk
->queue
;
3537 ida_free(&sd_index_ida
, sdkp
->index
);
3540 * Wait until all requests that are in progress have completed.
3541 * This is necessary to avoid that e.g. scsi_end_request() crashes
3542 * due to clearing the disk->private_data pointer. Wait from inside
3543 * scsi_disk_release() instead of from sd_release() to avoid that
3544 * freezing and unfreezing the request queue affects user space I/O
3545 * in case multiple processes open a /dev/sd... node concurrently.
3547 blk_mq_freeze_queue(q
);
3548 blk_mq_unfreeze_queue(q
);
3550 disk
->private_data
= NULL
;
3552 put_device(&sdkp
->device
->sdev_gendev
);
3554 sd_zbc_release_disk(sdkp
);
3559 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3561 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3562 struct scsi_sense_hdr sshdr
;
3563 struct scsi_device
*sdp
= sdkp
->device
;
3567 cmd
[4] |= 1; /* START */
3569 if (sdp
->start_stop_pwr_cond
)
3570 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3572 if (!scsi_device_online(sdp
))
3575 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3576 SD_TIMEOUT
, sdkp
->max_retries
, 0, RQF_PM
, NULL
);
3578 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3579 if (res
> 0 && scsi_sense_valid(&sshdr
)) {
3580 sd_print_sense_hdr(sdkp
, &sshdr
);
3581 /* 0x3a is medium not present */
3582 if (sshdr
.asc
== 0x3a)
3587 /* SCSI error codes must not go to the generic layer */
3595 * Send a SYNCHRONIZE CACHE instruction down to the device through
3596 * the normal SCSI command structure. Wait for the command to
3599 static void sd_shutdown(struct device
*dev
)
3601 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3604 return; /* this can happen */
3606 if (pm_runtime_suspended(dev
))
3609 if (sdkp
->WCE
&& sdkp
->media_present
) {
3610 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3611 sd_sync_cache(sdkp
, NULL
);
3614 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3615 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3616 sd_start_stop_device(sdkp
, 0);
3620 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3622 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3623 struct scsi_sense_hdr sshdr
;
3626 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3629 if (sdkp
->WCE
&& sdkp
->media_present
) {
3630 if (!sdkp
->device
->silence_suspend
)
3631 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3632 ret
= sd_sync_cache(sdkp
, &sshdr
);
3635 /* ignore OFFLINE device */
3639 if (!scsi_sense_valid(&sshdr
) ||
3640 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3644 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3645 * doesn't support sync. There's not much to do and
3646 * suspend shouldn't fail.
3652 if (sdkp
->device
->manage_start_stop
) {
3653 if (!sdkp
->device
->silence_suspend
)
3654 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3655 /* an error is not worth aborting a system sleep */
3656 ret
= sd_start_stop_device(sdkp
, 0);
3657 if (ignore_stop_errors
)
3664 static int sd_suspend_system(struct device
*dev
)
3666 return sd_suspend_common(dev
, true);
3669 static int sd_suspend_runtime(struct device
*dev
)
3671 return sd_suspend_common(dev
, false);
3674 static int sd_resume(struct device
*dev
)
3676 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3679 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3682 if (!sdkp
->device
->manage_start_stop
)
3685 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3686 ret
= sd_start_stop_device(sdkp
, 1);
3688 opal_unlock_from_suspend(sdkp
->opal_dev
);
3692 static int sd_resume_runtime(struct device
*dev
)
3694 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3695 struct scsi_device
*sdp
;
3697 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3702 if (sdp
->ignore_media_change
) {
3703 /* clear the device's sense data */
3704 static const u8 cmd
[10] = { REQUEST_SENSE
};
3706 if (scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
,
3707 NULL
, sdp
->request_queue
->rq_timeout
, 1, 0,
3709 sd_printk(KERN_NOTICE
, sdkp
,
3710 "Failed to clear sense data\n");
3713 return sd_resume(dev
);
3717 * init_sd - entry point for this driver (both when built in or when
3720 * Note: this function registers this driver with the scsi mid-level.
3722 static int __init
init_sd(void)
3724 int majors
= 0, i
, err
;
3726 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3728 for (i
= 0; i
< SD_MAJORS
; i
++) {
3729 if (__register_blkdev(sd_major(i
), "sd", sd_default_probe
))
3737 err
= class_register(&sd_disk_class
);
3741 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3743 if (!sd_cdb_cache
) {
3744 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3749 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3751 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3756 sd_page_pool
= mempool_create_page_pool(SD_MEMPOOL_SIZE
, 0);
3757 if (!sd_page_pool
) {
3758 printk(KERN_ERR
"sd: can't init discard page pool\n");
3763 err
= scsi_register_driver(&sd_template
.gendrv
);
3765 goto err_out_driver
;
3770 mempool_destroy(sd_page_pool
);
3773 mempool_destroy(sd_cdb_pool
);
3776 kmem_cache_destroy(sd_cdb_cache
);
3779 class_unregister(&sd_disk_class
);
3781 for (i
= 0; i
< SD_MAJORS
; i
++)
3782 unregister_blkdev(sd_major(i
), "sd");
3787 * exit_sd - exit point for this driver (when it is a module).
3789 * Note: this function unregisters this driver from the scsi mid-level.
3791 static void __exit
exit_sd(void)
3795 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3797 scsi_unregister_driver(&sd_template
.gendrv
);
3798 mempool_destroy(sd_cdb_pool
);
3799 mempool_destroy(sd_page_pool
);
3800 kmem_cache_destroy(sd_cdb_cache
);
3802 class_unregister(&sd_disk_class
);
3804 for (i
= 0; i
< SD_MAJORS
; i
++)
3805 unregister_blkdev(sd_major(i
), "sd");
3808 module_init(init_sd
);
3809 module_exit(exit_sd
);
3811 void sd_print_sense_hdr(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
3813 scsi_print_sense_hdr(sdkp
->device
,
3814 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3817 void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
, int result
)
3819 const char *hb_string
= scsi_hostbyte_string(result
);
3822 sd_printk(KERN_INFO
, sdkp
,
3823 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3824 hb_string
? hb_string
: "invalid",
3827 sd_printk(KERN_INFO
, sdkp
,
3828 "%s: Result: hostbyte=0x%02x driverbyte=%s\n",
3829 msg
, host_byte(result
), "DRIVER_OK");