1 // SPDX-License-Identifier: GPL-2.0-only
3 * sd.c Copyright (C) 1992 Drew Eckhardt
4 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
6 * Linux scsi disk driver
7 * Initial versions: Drew Eckhardt
8 * Subsequent revisions: Eric Youngdale
9 * Modification history:
10 * - Drew Eckhardt <drew@colorado.edu> original
11 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
12 * outstanding request, and other enhancements.
13 * Support loadable low-level scsi drivers.
14 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
15 * eight major numbers.
16 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
17 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
18 * sd_init and cleanups.
19 * - Alex Davis <letmein@erols.com> Fix problem where partition info
20 * not being read in sd_open. Fix problem where removable media
21 * could be ejected after sd_open.
22 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
23 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
24 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
25 * Support 32k/1M disks.
27 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
28 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
29 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
30 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
31 * - entering other commands: SCSI_LOG_HLQUEUE level 3
32 * Note: when the logging level is set by the user, it must be greater
33 * than the level indicated above to trigger output.
36 #include <linux/module.h>
38 #include <linux/kernel.h>
40 #include <linux/bio.h>
41 #include <linux/genhd.h>
42 #include <linux/hdreg.h>
43 #include <linux/errno.h>
44 #include <linux/idr.h>
45 #include <linux/interrupt.h>
46 #include <linux/init.h>
47 #include <linux/blkdev.h>
48 #include <linux/blkpg.h>
49 #include <linux/blk-pm.h>
50 #include <linux/delay.h>
51 #include <linux/mutex.h>
52 #include <linux/string_helpers.h>
53 #include <linux/async.h>
54 #include <linux/slab.h>
55 #include <linux/sed-opal.h>
56 #include <linux/pm_runtime.h>
58 #include <linux/t10-pi.h>
59 #include <linux/uaccess.h>
60 #include <asm/unaligned.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_dbg.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_driver.h>
67 #include <scsi/scsi_eh.h>
68 #include <scsi/scsi_host.h>
69 #include <scsi/scsi_ioctl.h>
70 #include <scsi/scsicam.h>
73 #include "scsi_priv.h"
74 #include "scsi_logging.h"
76 MODULE_AUTHOR("Eric Youngdale");
77 MODULE_DESCRIPTION("SCSI disk (sd) driver");
78 MODULE_LICENSE("GPL");
80 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR
);
81 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR
);
82 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR
);
83 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR
);
84 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR
);
85 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR
);
86 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR
);
87 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR
);
88 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR
);
89 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR
);
90 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR
);
91 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR
);
92 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR
);
93 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR
);
94 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR
);
95 MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR
);
96 MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK
);
97 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD
);
98 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC
);
99 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC
);
101 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
107 static void sd_config_discard(struct scsi_disk
*, unsigned int);
108 static void sd_config_write_same(struct scsi_disk
*);
109 static int sd_revalidate_disk(struct gendisk
*);
110 static void sd_unlock_native_capacity(struct gendisk
*disk
);
111 static int sd_probe(struct device
*);
112 static int sd_remove(struct device
*);
113 static void sd_shutdown(struct device
*);
114 static int sd_suspend_system(struct device
*);
115 static int sd_suspend_runtime(struct device
*);
116 static int sd_resume(struct device
*);
117 static void sd_rescan(struct device
*);
118 static blk_status_t
sd_init_command(struct scsi_cmnd
*SCpnt
);
119 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
);
120 static int sd_done(struct scsi_cmnd
*);
121 static void sd_eh_reset(struct scsi_cmnd
*);
122 static int sd_eh_action(struct scsi_cmnd
*, int);
123 static void sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
);
124 static void scsi_disk_release(struct device
*cdev
);
125 static void sd_print_sense_hdr(struct scsi_disk
*, struct scsi_sense_hdr
*);
126 static void sd_print_result(const struct scsi_disk
*, const char *, int);
128 static DEFINE_IDA(sd_index_ida
);
130 /* This semaphore is used to mediate the 0->1 reference get in the
131 * face of object destruction (i.e. we can't allow a get on an
132 * object after last put) */
133 static DEFINE_MUTEX(sd_ref_mutex
);
135 static struct kmem_cache
*sd_cdb_cache
;
136 static mempool_t
*sd_cdb_pool
;
137 static mempool_t
*sd_page_pool
;
139 static const char *sd_cache_types
[] = {
140 "write through", "none", "write back",
141 "write back, no read (daft)"
144 static void sd_set_flush_flag(struct scsi_disk
*sdkp
)
146 bool wc
= false, fua
= false;
154 blk_queue_write_cache(sdkp
->disk
->queue
, wc
, fua
);
158 cache_type_store(struct device
*dev
, struct device_attribute
*attr
,
159 const char *buf
, size_t count
)
161 int ct
, rcd
, wce
, sp
;
162 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
163 struct scsi_device
*sdp
= sdkp
->device
;
166 struct scsi_mode_data data
;
167 struct scsi_sense_hdr sshdr
;
168 static const char temp
[] = "temporary ";
171 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
172 /* no cache control on RBC devices; theoretically they
173 * can do it, but there's probably so many exceptions
174 * it's not worth the risk */
177 if (strncmp(buf
, temp
, sizeof(temp
) - 1) == 0) {
178 buf
+= sizeof(temp
) - 1;
179 sdkp
->cache_override
= 1;
181 sdkp
->cache_override
= 0;
184 ct
= sysfs_match_string(sd_cache_types
, buf
);
188 rcd
= ct
& 0x01 ? 1 : 0;
189 wce
= (ct
& 0x02) && !sdkp
->write_prot
? 1 : 0;
191 if (sdkp
->cache_override
) {
194 sd_set_flush_flag(sdkp
);
198 if (scsi_mode_sense(sdp
, 0x08, 8, buffer
, sizeof(buffer
), SD_TIMEOUT
,
199 SD_MAX_RETRIES
, &data
, NULL
))
201 len
= min_t(size_t, sizeof(buffer
), data
.length
- data
.header_length
-
202 data
.block_descriptor_length
);
203 buffer_data
= buffer
+ data
.header_length
+
204 data
.block_descriptor_length
;
205 buffer_data
[2] &= ~0x05;
206 buffer_data
[2] |= wce
<< 2 | rcd
;
207 sp
= buffer_data
[0] & 0x80 ? 1 : 0;
208 buffer_data
[0] &= ~0x80;
211 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
212 * received mode parameter buffer before doing MODE SELECT.
214 data
.device_specific
= 0;
216 if (scsi_mode_select(sdp
, 1, sp
, 8, buffer_data
, len
, SD_TIMEOUT
,
217 SD_MAX_RETRIES
, &data
, &sshdr
)) {
218 if (scsi_sense_valid(&sshdr
))
219 sd_print_sense_hdr(sdkp
, &sshdr
);
222 revalidate_disk(sdkp
->disk
);
227 manage_start_stop_show(struct device
*dev
, struct device_attribute
*attr
,
230 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
231 struct scsi_device
*sdp
= sdkp
->device
;
233 return sprintf(buf
, "%u\n", sdp
->manage_start_stop
);
237 manage_start_stop_store(struct device
*dev
, struct device_attribute
*attr
,
238 const char *buf
, size_t count
)
240 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
241 struct scsi_device
*sdp
= sdkp
->device
;
244 if (!capable(CAP_SYS_ADMIN
))
247 if (kstrtobool(buf
, &v
))
250 sdp
->manage_start_stop
= v
;
254 static DEVICE_ATTR_RW(manage_start_stop
);
257 allow_restart_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
259 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
261 return sprintf(buf
, "%u\n", sdkp
->device
->allow_restart
);
265 allow_restart_store(struct device
*dev
, struct device_attribute
*attr
,
266 const char *buf
, size_t count
)
269 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
270 struct scsi_device
*sdp
= sdkp
->device
;
272 if (!capable(CAP_SYS_ADMIN
))
275 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
278 if (kstrtobool(buf
, &v
))
281 sdp
->allow_restart
= v
;
285 static DEVICE_ATTR_RW(allow_restart
);
288 cache_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
290 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
291 int ct
= sdkp
->RCD
+ 2*sdkp
->WCE
;
293 return sprintf(buf
, "%s\n", sd_cache_types
[ct
]);
295 static DEVICE_ATTR_RW(cache_type
);
298 FUA_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
300 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
302 return sprintf(buf
, "%u\n", sdkp
->DPOFUA
);
304 static DEVICE_ATTR_RO(FUA
);
307 protection_type_show(struct device
*dev
, struct device_attribute
*attr
,
310 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
312 return sprintf(buf
, "%u\n", sdkp
->protection_type
);
316 protection_type_store(struct device
*dev
, struct device_attribute
*attr
,
317 const char *buf
, size_t count
)
319 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
323 if (!capable(CAP_SYS_ADMIN
))
326 err
= kstrtouint(buf
, 10, &val
);
331 if (val
<= T10_PI_TYPE3_PROTECTION
)
332 sdkp
->protection_type
= val
;
336 static DEVICE_ATTR_RW(protection_type
);
339 protection_mode_show(struct device
*dev
, struct device_attribute
*attr
,
342 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
343 struct scsi_device
*sdp
= sdkp
->device
;
344 unsigned int dif
, dix
;
346 dif
= scsi_host_dif_capable(sdp
->host
, sdkp
->protection_type
);
347 dix
= scsi_host_dix_capable(sdp
->host
, sdkp
->protection_type
);
349 if (!dix
&& scsi_host_dix_capable(sdp
->host
, T10_PI_TYPE0_PROTECTION
)) {
355 return sprintf(buf
, "none\n");
357 return sprintf(buf
, "%s%u\n", dix
? "dix" : "dif", dif
);
359 static DEVICE_ATTR_RO(protection_mode
);
362 app_tag_own_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
364 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
366 return sprintf(buf
, "%u\n", sdkp
->ATO
);
368 static DEVICE_ATTR_RO(app_tag_own
);
371 thin_provisioning_show(struct device
*dev
, struct device_attribute
*attr
,
374 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
376 return sprintf(buf
, "%u\n", sdkp
->lbpme
);
378 static DEVICE_ATTR_RO(thin_provisioning
);
380 /* sysfs_match_string() requires dense arrays */
381 static const char *lbp_mode
[] = {
382 [SD_LBP_FULL
] = "full",
383 [SD_LBP_UNMAP
] = "unmap",
384 [SD_LBP_WS16
] = "writesame_16",
385 [SD_LBP_WS10
] = "writesame_10",
386 [SD_LBP_ZERO
] = "writesame_zero",
387 [SD_LBP_DISABLE
] = "disabled",
391 provisioning_mode_show(struct device
*dev
, struct device_attribute
*attr
,
394 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
396 return sprintf(buf
, "%s\n", lbp_mode
[sdkp
->provisioning_mode
]);
400 provisioning_mode_store(struct device
*dev
, struct device_attribute
*attr
,
401 const char *buf
, size_t count
)
403 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
404 struct scsi_device
*sdp
= sdkp
->device
;
407 if (!capable(CAP_SYS_ADMIN
))
410 if (sd_is_zoned(sdkp
)) {
411 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
415 if (sdp
->type
!= TYPE_DISK
)
418 mode
= sysfs_match_string(lbp_mode
, buf
);
422 sd_config_discard(sdkp
, mode
);
426 static DEVICE_ATTR_RW(provisioning_mode
);
428 /* sysfs_match_string() requires dense arrays */
429 static const char *zeroing_mode
[] = {
430 [SD_ZERO_WRITE
] = "write",
431 [SD_ZERO_WS
] = "writesame",
432 [SD_ZERO_WS16_UNMAP
] = "writesame_16_unmap",
433 [SD_ZERO_WS10_UNMAP
] = "writesame_10_unmap",
437 zeroing_mode_show(struct device
*dev
, struct device_attribute
*attr
,
440 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
442 return sprintf(buf
, "%s\n", zeroing_mode
[sdkp
->zeroing_mode
]);
446 zeroing_mode_store(struct device
*dev
, struct device_attribute
*attr
,
447 const char *buf
, size_t count
)
449 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
452 if (!capable(CAP_SYS_ADMIN
))
455 mode
= sysfs_match_string(zeroing_mode
, buf
);
459 sdkp
->zeroing_mode
= mode
;
463 static DEVICE_ATTR_RW(zeroing_mode
);
466 max_medium_access_timeouts_show(struct device
*dev
,
467 struct device_attribute
*attr
, char *buf
)
469 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
471 return sprintf(buf
, "%u\n", sdkp
->max_medium_access_timeouts
);
475 max_medium_access_timeouts_store(struct device
*dev
,
476 struct device_attribute
*attr
, const char *buf
,
479 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
482 if (!capable(CAP_SYS_ADMIN
))
485 err
= kstrtouint(buf
, 10, &sdkp
->max_medium_access_timeouts
);
487 return err
? err
: count
;
489 static DEVICE_ATTR_RW(max_medium_access_timeouts
);
492 max_write_same_blocks_show(struct device
*dev
, struct device_attribute
*attr
,
495 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
497 return sprintf(buf
, "%u\n", sdkp
->max_ws_blocks
);
501 max_write_same_blocks_store(struct device
*dev
, struct device_attribute
*attr
,
502 const char *buf
, size_t count
)
504 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
505 struct scsi_device
*sdp
= sdkp
->device
;
509 if (!capable(CAP_SYS_ADMIN
))
512 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
515 err
= kstrtoul(buf
, 10, &max
);
521 sdp
->no_write_same
= 1;
522 else if (max
<= SD_MAX_WS16_BLOCKS
) {
523 sdp
->no_write_same
= 0;
524 sdkp
->max_ws_blocks
= max
;
527 sd_config_write_same(sdkp
);
531 static DEVICE_ATTR_RW(max_write_same_blocks
);
533 static struct attribute
*sd_disk_attrs
[] = {
534 &dev_attr_cache_type
.attr
,
536 &dev_attr_allow_restart
.attr
,
537 &dev_attr_manage_start_stop
.attr
,
538 &dev_attr_protection_type
.attr
,
539 &dev_attr_protection_mode
.attr
,
540 &dev_attr_app_tag_own
.attr
,
541 &dev_attr_thin_provisioning
.attr
,
542 &dev_attr_provisioning_mode
.attr
,
543 &dev_attr_zeroing_mode
.attr
,
544 &dev_attr_max_write_same_blocks
.attr
,
545 &dev_attr_max_medium_access_timeouts
.attr
,
548 ATTRIBUTE_GROUPS(sd_disk
);
550 static struct class sd_disk_class
= {
552 .owner
= THIS_MODULE
,
553 .dev_release
= scsi_disk_release
,
554 .dev_groups
= sd_disk_groups
,
557 static const struct dev_pm_ops sd_pm_ops
= {
558 .suspend
= sd_suspend_system
,
560 .poweroff
= sd_suspend_system
,
561 .restore
= sd_resume
,
562 .runtime_suspend
= sd_suspend_runtime
,
563 .runtime_resume
= sd_resume
,
566 static struct scsi_driver sd_template
= {
569 .owner
= THIS_MODULE
,
571 .probe_type
= PROBE_PREFER_ASYNCHRONOUS
,
573 .shutdown
= sd_shutdown
,
577 .init_command
= sd_init_command
,
578 .uninit_command
= sd_uninit_command
,
580 .eh_action
= sd_eh_action
,
581 .eh_reset
= sd_eh_reset
,
585 * Dummy kobj_map->probe function.
586 * The default ->probe function will call modprobe, which is
587 * pointless as this module is already loaded.
589 static struct kobject
*sd_default_probe(dev_t devt
, int *partno
, void *data
)
595 * Device no to disk mapping:
597 * major disc2 disc p1
598 * |............|.............|....|....| <- dev_t
601 * Inside a major, we have 16k disks, however mapped non-
602 * contiguously. The first 16 disks are for major0, the next
603 * ones with major1, ... Disk 256 is for major0 again, disk 272
605 * As we stay compatible with our numbering scheme, we can reuse
606 * the well-know SCSI majors 8, 65--71, 136--143.
608 static int sd_major(int major_idx
)
612 return SCSI_DISK0_MAJOR
;
614 return SCSI_DISK1_MAJOR
+ major_idx
- 1;
616 return SCSI_DISK8_MAJOR
+ major_idx
- 8;
619 return 0; /* shut up gcc */
623 static struct scsi_disk
*scsi_disk_get(struct gendisk
*disk
)
625 struct scsi_disk
*sdkp
= NULL
;
627 mutex_lock(&sd_ref_mutex
);
629 if (disk
->private_data
) {
630 sdkp
= scsi_disk(disk
);
631 if (scsi_device_get(sdkp
->device
) == 0)
632 get_device(&sdkp
->dev
);
636 mutex_unlock(&sd_ref_mutex
);
640 static void scsi_disk_put(struct scsi_disk
*sdkp
)
642 struct scsi_device
*sdev
= sdkp
->device
;
644 mutex_lock(&sd_ref_mutex
);
645 put_device(&sdkp
->dev
);
646 scsi_device_put(sdev
);
647 mutex_unlock(&sd_ref_mutex
);
650 #ifdef CONFIG_BLK_SED_OPAL
651 static int sd_sec_submit(void *data
, u16 spsp
, u8 secp
, void *buffer
,
652 size_t len
, bool send
)
654 struct scsi_device
*sdev
= data
;
658 cdb
[0] = send
? SECURITY_PROTOCOL_OUT
: SECURITY_PROTOCOL_IN
;
660 put_unaligned_be16(spsp
, &cdb
[2]);
661 put_unaligned_be32(len
, &cdb
[6]);
663 ret
= scsi_execute_req(sdev
, cdb
,
664 send
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
,
665 buffer
, len
, NULL
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
666 return ret
<= 0 ? ret
: -EIO
;
668 #endif /* CONFIG_BLK_SED_OPAL */
671 * Look up the DIX operation based on whether the command is read or
672 * write and whether dix and dif are enabled.
674 static unsigned int sd_prot_op(bool write
, bool dix
, bool dif
)
676 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
677 static const unsigned int ops
[] = { /* wrt dix dif */
678 SCSI_PROT_NORMAL
, /* 0 0 0 */
679 SCSI_PROT_READ_STRIP
, /* 0 0 1 */
680 SCSI_PROT_READ_INSERT
, /* 0 1 0 */
681 SCSI_PROT_READ_PASS
, /* 0 1 1 */
682 SCSI_PROT_NORMAL
, /* 1 0 0 */
683 SCSI_PROT_WRITE_INSERT
, /* 1 0 1 */
684 SCSI_PROT_WRITE_STRIP
, /* 1 1 0 */
685 SCSI_PROT_WRITE_PASS
, /* 1 1 1 */
688 return ops
[write
<< 2 | dix
<< 1 | dif
];
692 * Returns a mask of the protection flags that are valid for a given DIX
695 static unsigned int sd_prot_flag_mask(unsigned int prot_op
)
697 static const unsigned int flag_mask
[] = {
698 [SCSI_PROT_NORMAL
] = 0,
700 [SCSI_PROT_READ_STRIP
] = SCSI_PROT_TRANSFER_PI
|
701 SCSI_PROT_GUARD_CHECK
|
702 SCSI_PROT_REF_CHECK
|
703 SCSI_PROT_REF_INCREMENT
,
705 [SCSI_PROT_READ_INSERT
] = SCSI_PROT_REF_INCREMENT
|
706 SCSI_PROT_IP_CHECKSUM
,
708 [SCSI_PROT_READ_PASS
] = SCSI_PROT_TRANSFER_PI
|
709 SCSI_PROT_GUARD_CHECK
|
710 SCSI_PROT_REF_CHECK
|
711 SCSI_PROT_REF_INCREMENT
|
712 SCSI_PROT_IP_CHECKSUM
,
714 [SCSI_PROT_WRITE_INSERT
] = SCSI_PROT_TRANSFER_PI
|
715 SCSI_PROT_REF_INCREMENT
,
717 [SCSI_PROT_WRITE_STRIP
] = SCSI_PROT_GUARD_CHECK
|
718 SCSI_PROT_REF_CHECK
|
719 SCSI_PROT_REF_INCREMENT
|
720 SCSI_PROT_IP_CHECKSUM
,
722 [SCSI_PROT_WRITE_PASS
] = SCSI_PROT_TRANSFER_PI
|
723 SCSI_PROT_GUARD_CHECK
|
724 SCSI_PROT_REF_CHECK
|
725 SCSI_PROT_REF_INCREMENT
|
726 SCSI_PROT_IP_CHECKSUM
,
729 return flag_mask
[prot_op
];
732 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd
*scmd
,
733 unsigned int dix
, unsigned int dif
)
735 struct bio
*bio
= scmd
->request
->bio
;
736 unsigned int prot_op
= sd_prot_op(rq_data_dir(scmd
->request
), dix
, dif
);
737 unsigned int protect
= 0;
739 if (dix
) { /* DIX Type 0, 1, 2, 3 */
740 if (bio_integrity_flagged(bio
, BIP_IP_CHECKSUM
))
741 scmd
->prot_flags
|= SCSI_PROT_IP_CHECKSUM
;
743 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
744 scmd
->prot_flags
|= SCSI_PROT_GUARD_CHECK
;
747 if (dif
!= T10_PI_TYPE3_PROTECTION
) { /* DIX/DIF Type 0, 1, 2 */
748 scmd
->prot_flags
|= SCSI_PROT_REF_INCREMENT
;
750 if (bio_integrity_flagged(bio
, BIP_CTRL_NOCHECK
) == false)
751 scmd
->prot_flags
|= SCSI_PROT_REF_CHECK
;
754 if (dif
) { /* DIX/DIF Type 1, 2, 3 */
755 scmd
->prot_flags
|= SCSI_PROT_TRANSFER_PI
;
757 if (bio_integrity_flagged(bio
, BIP_DISK_NOCHECK
))
758 protect
= 3 << 5; /* Disable target PI checking */
760 protect
= 1 << 5; /* Enable target PI checking */
763 scsi_set_prot_op(scmd
, prot_op
);
764 scsi_set_prot_type(scmd
, dif
);
765 scmd
->prot_flags
&= sd_prot_flag_mask(prot_op
);
770 static void sd_config_discard(struct scsi_disk
*sdkp
, unsigned int mode
)
772 struct request_queue
*q
= sdkp
->disk
->queue
;
773 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
774 unsigned int max_blocks
= 0;
776 q
->limits
.discard_alignment
=
777 sdkp
->unmap_alignment
* logical_block_size
;
778 q
->limits
.discard_granularity
=
779 max(sdkp
->physical_block_size
,
780 sdkp
->unmap_granularity
* logical_block_size
);
781 sdkp
->provisioning_mode
= mode
;
787 blk_queue_max_discard_sectors(q
, 0);
788 blk_queue_flag_clear(QUEUE_FLAG_DISCARD
, q
);
792 max_blocks
= min_not_zero(sdkp
->max_unmap_blocks
,
793 (u32
)SD_MAX_WS16_BLOCKS
);
797 if (sdkp
->device
->unmap_limit_for_ws
)
798 max_blocks
= sdkp
->max_unmap_blocks
;
800 max_blocks
= sdkp
->max_ws_blocks
;
802 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS16_BLOCKS
);
806 if (sdkp
->device
->unmap_limit_for_ws
)
807 max_blocks
= sdkp
->max_unmap_blocks
;
809 max_blocks
= sdkp
->max_ws_blocks
;
811 max_blocks
= min_not_zero(max_blocks
, (u32
)SD_MAX_WS10_BLOCKS
);
815 max_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
816 (u32
)SD_MAX_WS10_BLOCKS
);
820 blk_queue_max_discard_sectors(q
, max_blocks
* (logical_block_size
>> 9));
821 blk_queue_flag_set(QUEUE_FLAG_DISCARD
, q
);
824 static blk_status_t
sd_setup_unmap_cmnd(struct scsi_cmnd
*cmd
)
826 struct scsi_device
*sdp
= cmd
->device
;
827 struct request
*rq
= cmd
->request
;
828 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
829 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
830 unsigned int data_len
= 24;
833 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
834 if (!rq
->special_vec
.bv_page
)
835 return BLK_STS_RESOURCE
;
836 clear_highpage(rq
->special_vec
.bv_page
);
837 rq
->special_vec
.bv_offset
= 0;
838 rq
->special_vec
.bv_len
= data_len
;
839 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
842 cmd
->cmnd
[0] = UNMAP
;
845 buf
= page_address(rq
->special_vec
.bv_page
);
846 put_unaligned_be16(6 + 16, &buf
[0]);
847 put_unaligned_be16(16, &buf
[2]);
848 put_unaligned_be64(lba
, &buf
[8]);
849 put_unaligned_be32(nr_blocks
, &buf
[16]);
851 cmd
->allowed
= SD_MAX_RETRIES
;
852 cmd
->transfersize
= data_len
;
853 rq
->timeout
= SD_TIMEOUT
;
855 return scsi_init_io(cmd
);
858 static blk_status_t
sd_setup_write_same16_cmnd(struct scsi_cmnd
*cmd
,
861 struct scsi_device
*sdp
= cmd
->device
;
862 struct request
*rq
= cmd
->request
;
863 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
864 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
865 u32 data_len
= sdp
->sector_size
;
867 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
868 if (!rq
->special_vec
.bv_page
)
869 return BLK_STS_RESOURCE
;
870 clear_highpage(rq
->special_vec
.bv_page
);
871 rq
->special_vec
.bv_offset
= 0;
872 rq
->special_vec
.bv_len
= data_len
;
873 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
876 cmd
->cmnd
[0] = WRITE_SAME_16
;
878 cmd
->cmnd
[1] = 0x8; /* UNMAP */
879 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
880 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
882 cmd
->allowed
= SD_MAX_RETRIES
;
883 cmd
->transfersize
= data_len
;
884 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
886 return scsi_init_io(cmd
);
889 static blk_status_t
sd_setup_write_same10_cmnd(struct scsi_cmnd
*cmd
,
892 struct scsi_device
*sdp
= cmd
->device
;
893 struct request
*rq
= cmd
->request
;
894 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
895 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
896 u32 data_len
= sdp
->sector_size
;
898 rq
->special_vec
.bv_page
= mempool_alloc(sd_page_pool
, GFP_ATOMIC
);
899 if (!rq
->special_vec
.bv_page
)
900 return BLK_STS_RESOURCE
;
901 clear_highpage(rq
->special_vec
.bv_page
);
902 rq
->special_vec
.bv_offset
= 0;
903 rq
->special_vec
.bv_len
= data_len
;
904 rq
->rq_flags
|= RQF_SPECIAL_PAYLOAD
;
907 cmd
->cmnd
[0] = WRITE_SAME
;
909 cmd
->cmnd
[1] = 0x8; /* UNMAP */
910 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
911 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
913 cmd
->allowed
= SD_MAX_RETRIES
;
914 cmd
->transfersize
= data_len
;
915 rq
->timeout
= unmap
? SD_TIMEOUT
: SD_WRITE_SAME_TIMEOUT
;
917 return scsi_init_io(cmd
);
920 static blk_status_t
sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd
)
922 struct request
*rq
= cmd
->request
;
923 struct scsi_device
*sdp
= cmd
->device
;
924 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
925 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
926 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
928 if (!(rq
->cmd_flags
& REQ_NOUNMAP
)) {
929 switch (sdkp
->zeroing_mode
) {
930 case SD_ZERO_WS16_UNMAP
:
931 return sd_setup_write_same16_cmnd(cmd
, true);
932 case SD_ZERO_WS10_UNMAP
:
933 return sd_setup_write_same10_cmnd(cmd
, true);
937 if (sdp
->no_write_same
)
938 return BLK_STS_TARGET
;
940 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff)
941 return sd_setup_write_same16_cmnd(cmd
, false);
943 return sd_setup_write_same10_cmnd(cmd
, false);
946 static void sd_config_write_same(struct scsi_disk
*sdkp
)
948 struct request_queue
*q
= sdkp
->disk
->queue
;
949 unsigned int logical_block_size
= sdkp
->device
->sector_size
;
951 if (sdkp
->device
->no_write_same
) {
952 sdkp
->max_ws_blocks
= 0;
956 /* Some devices can not handle block counts above 0xffff despite
957 * supporting WRITE SAME(16). Consequently we default to 64k
958 * blocks per I/O unless the device explicitly advertises a
961 if (sdkp
->max_ws_blocks
> SD_MAX_WS10_BLOCKS
)
962 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
963 (u32
)SD_MAX_WS16_BLOCKS
);
964 else if (sdkp
->ws16
|| sdkp
->ws10
|| sdkp
->device
->no_report_opcodes
)
965 sdkp
->max_ws_blocks
= min_not_zero(sdkp
->max_ws_blocks
,
966 (u32
)SD_MAX_WS10_BLOCKS
);
968 sdkp
->device
->no_write_same
= 1;
969 sdkp
->max_ws_blocks
= 0;
972 if (sdkp
->lbprz
&& sdkp
->lbpws
)
973 sdkp
->zeroing_mode
= SD_ZERO_WS16_UNMAP
;
974 else if (sdkp
->lbprz
&& sdkp
->lbpws10
)
975 sdkp
->zeroing_mode
= SD_ZERO_WS10_UNMAP
;
976 else if (sdkp
->max_ws_blocks
)
977 sdkp
->zeroing_mode
= SD_ZERO_WS
;
979 sdkp
->zeroing_mode
= SD_ZERO_WRITE
;
981 if (sdkp
->max_ws_blocks
&&
982 sdkp
->physical_block_size
> logical_block_size
) {
984 * Reporting a maximum number of blocks that is not aligned
985 * on the device physical size would cause a large write same
986 * request to be split into physically unaligned chunks by
987 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
988 * even if the caller of these functions took care to align the
989 * large request. So make sure the maximum reported is aligned
990 * to the device physical block size. This is only an optional
991 * optimization for regular disks, but this is mandatory to
992 * avoid failure of large write same requests directed at
993 * sequential write required zones of host-managed ZBC disks.
995 sdkp
->max_ws_blocks
=
996 round_down(sdkp
->max_ws_blocks
,
997 bytes_to_logical(sdkp
->device
,
998 sdkp
->physical_block_size
));
1002 blk_queue_max_write_same_sectors(q
, sdkp
->max_ws_blocks
*
1003 (logical_block_size
>> 9));
1004 blk_queue_max_write_zeroes_sectors(q
, sdkp
->max_ws_blocks
*
1005 (logical_block_size
>> 9));
1009 * sd_setup_write_same_cmnd - write the same data to multiple blocks
1010 * @cmd: command to prepare
1012 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
1013 * the preference indicated by the target device.
1015 static blk_status_t
sd_setup_write_same_cmnd(struct scsi_cmnd
*cmd
)
1017 struct request
*rq
= cmd
->request
;
1018 struct scsi_device
*sdp
= cmd
->device
;
1019 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1020 struct bio
*bio
= rq
->bio
;
1021 u64 lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1022 u32 nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1025 if (sdkp
->device
->no_write_same
)
1026 return BLK_STS_TARGET
;
1028 BUG_ON(bio_offset(bio
) || bio_iovec(bio
).bv_len
!= sdp
->sector_size
);
1030 rq
->timeout
= SD_WRITE_SAME_TIMEOUT
;
1032 if (sdkp
->ws16
|| lba
> 0xffffffff || nr_blocks
> 0xffff) {
1034 cmd
->cmnd
[0] = WRITE_SAME_16
;
1035 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1036 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1039 cmd
->cmnd
[0] = WRITE_SAME
;
1040 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1041 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1044 cmd
->transfersize
= sdp
->sector_size
;
1045 cmd
->allowed
= SD_MAX_RETRIES
;
1048 * For WRITE SAME the data transferred via the DATA OUT buffer is
1049 * different from the amount of data actually written to the target.
1051 * We set up __data_len to the amount of data transferred via the
1052 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1053 * to transfer a single sector of data first, but then reset it to
1054 * the amount of data to be written right after so that the I/O path
1055 * knows how much to actually write.
1057 rq
->__data_len
= sdp
->sector_size
;
1058 ret
= scsi_init_io(cmd
);
1059 rq
->__data_len
= blk_rq_bytes(rq
);
1064 static blk_status_t
sd_setup_flush_cmnd(struct scsi_cmnd
*cmd
)
1066 struct request
*rq
= cmd
->request
;
1068 /* flush requests don't perform I/O, zero the S/G table */
1069 memset(&cmd
->sdb
, 0, sizeof(cmd
->sdb
));
1071 cmd
->cmnd
[0] = SYNCHRONIZE_CACHE
;
1073 cmd
->transfersize
= 0;
1074 cmd
->allowed
= SD_MAX_RETRIES
;
1076 rq
->timeout
= rq
->q
->rq_timeout
* SD_FLUSH_TIMEOUT_MULTIPLIER
;
1080 static blk_status_t
sd_setup_rw32_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1081 sector_t lba
, unsigned int nr_blocks
,
1082 unsigned char flags
)
1084 cmd
->cmnd
= mempool_alloc(sd_cdb_pool
, GFP_ATOMIC
);
1085 if (unlikely(cmd
->cmnd
== NULL
))
1086 return BLK_STS_RESOURCE
;
1088 cmd
->cmd_len
= SD_EXT_CDB_SIZE
;
1089 memset(cmd
->cmnd
, 0, cmd
->cmd_len
);
1091 cmd
->cmnd
[0] = VARIABLE_LENGTH_CMD
;
1092 cmd
->cmnd
[7] = 0x18; /* Additional CDB len */
1093 cmd
->cmnd
[9] = write
? WRITE_32
: READ_32
;
1094 cmd
->cmnd
[10] = flags
;
1095 put_unaligned_be64(lba
, &cmd
->cmnd
[12]);
1096 put_unaligned_be32(lba
, &cmd
->cmnd
[20]); /* Expected Indirect LBA */
1097 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[28]);
1102 static blk_status_t
sd_setup_rw16_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1103 sector_t lba
, unsigned int nr_blocks
,
1104 unsigned char flags
)
1107 cmd
->cmnd
[0] = write
? WRITE_16
: READ_16
;
1108 cmd
->cmnd
[1] = flags
;
1111 put_unaligned_be64(lba
, &cmd
->cmnd
[2]);
1112 put_unaligned_be32(nr_blocks
, &cmd
->cmnd
[10]);
1117 static blk_status_t
sd_setup_rw10_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1118 sector_t lba
, unsigned int nr_blocks
,
1119 unsigned char flags
)
1122 cmd
->cmnd
[0] = write
? WRITE_10
: READ_10
;
1123 cmd
->cmnd
[1] = flags
;
1126 put_unaligned_be32(lba
, &cmd
->cmnd
[2]);
1127 put_unaligned_be16(nr_blocks
, &cmd
->cmnd
[7]);
1132 static blk_status_t
sd_setup_rw6_cmnd(struct scsi_cmnd
*cmd
, bool write
,
1133 sector_t lba
, unsigned int nr_blocks
,
1134 unsigned char flags
)
1136 /* Avoid that 0 blocks gets translated into 256 blocks. */
1137 if (WARN_ON_ONCE(nr_blocks
== 0))
1138 return BLK_STS_IOERR
;
1140 if (unlikely(flags
& 0x8)) {
1142 * This happens only if this drive failed 10byte rw
1143 * command with ILLEGAL_REQUEST during operation and
1144 * thus turned off use_10_for_rw.
1146 scmd_printk(KERN_ERR
, cmd
, "FUA write on READ/WRITE(6) drive\n");
1147 return BLK_STS_IOERR
;
1151 cmd
->cmnd
[0] = write
? WRITE_6
: READ_6
;
1152 cmd
->cmnd
[1] = (lba
>> 16) & 0x1f;
1153 cmd
->cmnd
[2] = (lba
>> 8) & 0xff;
1154 cmd
->cmnd
[3] = lba
& 0xff;
1155 cmd
->cmnd
[4] = nr_blocks
;
1161 static blk_status_t
sd_setup_read_write_cmnd(struct scsi_cmnd
*cmd
)
1163 struct request
*rq
= cmd
->request
;
1164 struct scsi_device
*sdp
= cmd
->device
;
1165 struct scsi_disk
*sdkp
= scsi_disk(rq
->rq_disk
);
1166 sector_t lba
= sectors_to_logical(sdp
, blk_rq_pos(rq
));
1168 unsigned int nr_blocks
= sectors_to_logical(sdp
, blk_rq_sectors(rq
));
1170 unsigned int mask
= logical_to_sectors(sdp
, 1) - 1;
1171 bool write
= rq_data_dir(rq
) == WRITE
;
1172 unsigned char protect
, fua
;
1175 ret
= scsi_init_io(cmd
);
1176 if (ret
!= BLK_STS_OK
)
1179 if (!scsi_device_online(sdp
) || sdp
->changed
) {
1180 scmd_printk(KERN_ERR
, cmd
, "device offline or changed\n");
1181 return BLK_STS_IOERR
;
1184 if (blk_rq_pos(rq
) + blk_rq_sectors(rq
) > get_capacity(rq
->rq_disk
)) {
1185 scmd_printk(KERN_ERR
, cmd
, "access beyond end of device\n");
1186 return BLK_STS_IOERR
;
1189 if ((blk_rq_pos(rq
) & mask
) || (blk_rq_sectors(rq
) & mask
)) {
1190 scmd_printk(KERN_ERR
, cmd
, "request not aligned to the logical block size\n");
1191 return BLK_STS_IOERR
;
1195 * Some SD card readers can't handle accesses which touch the
1196 * last one or two logical blocks. Split accesses as needed.
1198 threshold
= sdkp
->capacity
- SD_LAST_BUGGY_SECTORS
;
1200 if (unlikely(sdp
->last_sector_bug
&& lba
+ nr_blocks
> threshold
)) {
1201 if (lba
< threshold
) {
1202 /* Access up to the threshold but not beyond */
1203 nr_blocks
= threshold
- lba
;
1205 /* Access only a single logical block */
1210 fua
= rq
->cmd_flags
& REQ_FUA
? 0x8 : 0;
1211 dix
= scsi_prot_sg_count(cmd
);
1212 dif
= scsi_host_dif_capable(cmd
->device
->host
, sdkp
->protection_type
);
1215 protect
= sd_setup_protect_cmnd(cmd
, dix
, dif
);
1219 if (protect
&& sdkp
->protection_type
== T10_PI_TYPE2_PROTECTION
) {
1220 ret
= sd_setup_rw32_cmnd(cmd
, write
, lba
, nr_blocks
,
1222 } else if (sdp
->use_16_for_rw
|| (nr_blocks
> 0xffff)) {
1223 ret
= sd_setup_rw16_cmnd(cmd
, write
, lba
, nr_blocks
,
1225 } else if ((nr_blocks
> 0xff) || (lba
> 0x1fffff) ||
1226 sdp
->use_10_for_rw
|| protect
) {
1227 ret
= sd_setup_rw10_cmnd(cmd
, write
, lba
, nr_blocks
,
1230 ret
= sd_setup_rw6_cmnd(cmd
, write
, lba
, nr_blocks
,
1234 if (unlikely(ret
!= BLK_STS_OK
))
1238 * We shouldn't disconnect in the middle of a sector, so with a dumb
1239 * host adapter, it's safe to assume that we can at least transfer
1240 * this many bytes between each connect / disconnect.
1242 cmd
->transfersize
= sdp
->sector_size
;
1243 cmd
->underflow
= nr_blocks
<< 9;
1244 cmd
->allowed
= SD_MAX_RETRIES
;
1245 cmd
->sdb
.length
= nr_blocks
* sdp
->sector_size
;
1248 scmd_printk(KERN_INFO
, cmd
,
1249 "%s: block=%llu, count=%d\n", __func__
,
1250 (unsigned long long)blk_rq_pos(rq
),
1251 blk_rq_sectors(rq
)));
1253 scmd_printk(KERN_INFO
, cmd
,
1254 "%s %d/%u 512 byte blocks.\n",
1255 write
? "writing" : "reading", nr_blocks
,
1256 blk_rq_sectors(rq
)));
1259 * This indicates that the command is ready from our end to be
1265 static blk_status_t
sd_init_command(struct scsi_cmnd
*cmd
)
1267 struct request
*rq
= cmd
->request
;
1269 switch (req_op(rq
)) {
1270 case REQ_OP_DISCARD
:
1271 switch (scsi_disk(rq
->rq_disk
)->provisioning_mode
) {
1273 return sd_setup_unmap_cmnd(cmd
);
1275 return sd_setup_write_same16_cmnd(cmd
, true);
1277 return sd_setup_write_same10_cmnd(cmd
, true);
1279 return sd_setup_write_same10_cmnd(cmd
, false);
1281 return BLK_STS_TARGET
;
1283 case REQ_OP_WRITE_ZEROES
:
1284 return sd_setup_write_zeroes_cmnd(cmd
);
1285 case REQ_OP_WRITE_SAME
:
1286 return sd_setup_write_same_cmnd(cmd
);
1288 return sd_setup_flush_cmnd(cmd
);
1291 return sd_setup_read_write_cmnd(cmd
);
1292 case REQ_OP_ZONE_RESET
:
1293 return sd_zbc_setup_reset_cmnd(cmd
, false);
1294 case REQ_OP_ZONE_RESET_ALL
:
1295 return sd_zbc_setup_reset_cmnd(cmd
, true);
1298 return BLK_STS_NOTSUPP
;
1302 static void sd_uninit_command(struct scsi_cmnd
*SCpnt
)
1304 struct request
*rq
= SCpnt
->request
;
1307 if (rq
->rq_flags
& RQF_SPECIAL_PAYLOAD
)
1308 mempool_free(rq
->special_vec
.bv_page
, sd_page_pool
);
1310 if (SCpnt
->cmnd
!= scsi_req(rq
)->cmd
) {
1314 mempool_free(cmnd
, sd_cdb_pool
);
1319 * sd_open - open a scsi disk device
1320 * @bdev: Block device of the scsi disk to open
1321 * @mode: FMODE_* mask
1323 * Returns 0 if successful. Returns a negated errno value in case
1326 * Note: This can be called from a user context (e.g. fsck(1) )
1327 * or from within the kernel (e.g. as a result of a mount(1) ).
1328 * In the latter case @inode and @filp carry an abridged amount
1329 * of information as noted above.
1331 * Locking: called with bdev->bd_mutex held.
1333 static int sd_open(struct block_device
*bdev
, fmode_t mode
)
1335 struct scsi_disk
*sdkp
= scsi_disk_get(bdev
->bd_disk
);
1336 struct scsi_device
*sdev
;
1342 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_open\n"));
1344 sdev
= sdkp
->device
;
1347 * If the device is in error recovery, wait until it is done.
1348 * If the device is offline, then disallow any access to it.
1351 if (!scsi_block_when_processing_errors(sdev
))
1354 if (sdev
->removable
|| sdkp
->write_prot
)
1355 check_disk_change(bdev
);
1358 * If the drive is empty, just let the open fail.
1360 retval
= -ENOMEDIUM
;
1361 if (sdev
->removable
&& !sdkp
->media_present
&& !(mode
& FMODE_NDELAY
))
1365 * If the device has the write protect tab set, have the open fail
1366 * if the user expects to be able to write to the thing.
1369 if (sdkp
->write_prot
&& (mode
& FMODE_WRITE
))
1373 * It is possible that the disk changing stuff resulted in
1374 * the device being taken offline. If this is the case,
1375 * report this to the user, and don't pretend that the
1376 * open actually succeeded.
1379 if (!scsi_device_online(sdev
))
1382 if ((atomic_inc_return(&sdkp
->openers
) == 1) && sdev
->removable
) {
1383 if (scsi_block_when_processing_errors(sdev
))
1384 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_PREVENT
);
1390 scsi_disk_put(sdkp
);
1395 * sd_release - invoked when the (last) close(2) is called on this
1397 * @disk: disk to release
1398 * @mode: FMODE_* mask
1402 * Note: may block (uninterruptible) if error recovery is underway
1405 * Locking: called with bdev->bd_mutex held.
1407 static void sd_release(struct gendisk
*disk
, fmode_t mode
)
1409 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1410 struct scsi_device
*sdev
= sdkp
->device
;
1412 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_release\n"));
1414 if (atomic_dec_return(&sdkp
->openers
) == 0 && sdev
->removable
) {
1415 if (scsi_block_when_processing_errors(sdev
))
1416 scsi_set_medium_removal(sdev
, SCSI_REMOVAL_ALLOW
);
1419 scsi_disk_put(sdkp
);
1422 static int sd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
1424 struct scsi_disk
*sdkp
= scsi_disk(bdev
->bd_disk
);
1425 struct scsi_device
*sdp
= sdkp
->device
;
1426 struct Scsi_Host
*host
= sdp
->host
;
1427 sector_t capacity
= logical_to_sectors(sdp
, sdkp
->capacity
);
1430 /* default to most commonly used values */
1431 diskinfo
[0] = 0x40; /* 1 << 6 */
1432 diskinfo
[1] = 0x20; /* 1 << 5 */
1433 diskinfo
[2] = capacity
>> 11;
1435 /* override with calculated, extended default, or driver values */
1436 if (host
->hostt
->bios_param
)
1437 host
->hostt
->bios_param(sdp
, bdev
, capacity
, diskinfo
);
1439 scsicam_bios_param(bdev
, capacity
, diskinfo
);
1441 geo
->heads
= diskinfo
[0];
1442 geo
->sectors
= diskinfo
[1];
1443 geo
->cylinders
= diskinfo
[2];
1448 * sd_ioctl - process an ioctl
1449 * @bdev: target block device
1450 * @mode: FMODE_* mask
1451 * @cmd: ioctl command number
1452 * @arg: this is third argument given to ioctl(2) system call.
1453 * Often contains a pointer.
1455 * Returns 0 if successful (some ioctls return positive numbers on
1456 * success as well). Returns a negated errno value in case of error.
1458 * Note: most ioctls are forward onto the block subsystem or further
1459 * down in the scsi subsystem.
1461 static int sd_ioctl(struct block_device
*bdev
, fmode_t mode
,
1462 unsigned int cmd
, unsigned long arg
)
1464 struct gendisk
*disk
= bdev
->bd_disk
;
1465 struct scsi_disk
*sdkp
= scsi_disk(disk
);
1466 struct scsi_device
*sdp
= sdkp
->device
;
1467 void __user
*p
= (void __user
*)arg
;
1470 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO
, sdkp
, "sd_ioctl: disk=%s, "
1471 "cmd=0x%x\n", disk
->disk_name
, cmd
));
1473 error
= scsi_verify_blk_ioctl(bdev
, cmd
);
1478 * If we are in the middle of error recovery, don't let anyone
1479 * else try and use this device. Also, if error recovery fails, it
1480 * may try and take the device offline, in which case all further
1481 * access to the device is prohibited.
1483 error
= scsi_ioctl_block_when_processing_errors(sdp
, cmd
,
1484 (mode
& FMODE_NDELAY
) != 0);
1488 if (is_sed_ioctl(cmd
))
1489 return sed_ioctl(sdkp
->opal_dev
, cmd
, p
);
1492 * Send SCSI addressing ioctls directly to mid level, send other
1493 * ioctls to block level and then onto mid level if they can't be
1497 case SCSI_IOCTL_GET_IDLUN
:
1498 case SCSI_IOCTL_GET_BUS_NUMBER
:
1499 error
= scsi_ioctl(sdp
, cmd
, p
);
1502 error
= scsi_cmd_blk_ioctl(bdev
, mode
, cmd
, p
);
1503 if (error
!= -ENOTTY
)
1505 error
= scsi_ioctl(sdp
, cmd
, p
);
1512 static void set_media_not_present(struct scsi_disk
*sdkp
)
1514 if (sdkp
->media_present
)
1515 sdkp
->device
->changed
= 1;
1517 if (sdkp
->device
->removable
) {
1518 sdkp
->media_present
= 0;
1523 static int media_not_present(struct scsi_disk
*sdkp
,
1524 struct scsi_sense_hdr
*sshdr
)
1526 if (!scsi_sense_valid(sshdr
))
1529 /* not invoked for commands that could return deferred errors */
1530 switch (sshdr
->sense_key
) {
1531 case UNIT_ATTENTION
:
1533 /* medium not present */
1534 if (sshdr
->asc
== 0x3A) {
1535 set_media_not_present(sdkp
);
1543 * sd_check_events - check media events
1544 * @disk: kernel device descriptor
1545 * @clearing: disk events currently being cleared
1547 * Returns mask of DISK_EVENT_*.
1549 * Note: this function is invoked from the block subsystem.
1551 static unsigned int sd_check_events(struct gendisk
*disk
, unsigned int clearing
)
1553 struct scsi_disk
*sdkp
= scsi_disk_get(disk
);
1554 struct scsi_device
*sdp
;
1561 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
, "sd_check_events\n"));
1564 * If the device is offline, don't send any commands - just pretend as
1565 * if the command failed. If the device ever comes back online, we
1566 * can deal with it then. It is only because of unrecoverable errors
1567 * that we would ever take a device offline in the first place.
1569 if (!scsi_device_online(sdp
)) {
1570 set_media_not_present(sdkp
);
1575 * Using TEST_UNIT_READY enables differentiation between drive with
1576 * no cartridge loaded - NOT READY, drive with changed cartridge -
1577 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1579 * Drives that auto spin down. eg iomega jaz 1G, will be started
1580 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1581 * sd_revalidate() is called.
1583 if (scsi_block_when_processing_errors(sdp
)) {
1584 struct scsi_sense_hdr sshdr
= { 0, };
1586 retval
= scsi_test_unit_ready(sdp
, SD_TIMEOUT
, SD_MAX_RETRIES
,
1589 /* failed to execute TUR, assume media not present */
1590 if (host_byte(retval
)) {
1591 set_media_not_present(sdkp
);
1595 if (media_not_present(sdkp
, &sshdr
))
1600 * For removable scsi disk we have to recognise the presence
1601 * of a disk in the drive.
1603 if (!sdkp
->media_present
)
1605 sdkp
->media_present
= 1;
1608 * sdp->changed is set under the following conditions:
1610 * Medium present state has changed in either direction.
1611 * Device has indicated UNIT_ATTENTION.
1613 retval
= sdp
->changed
? DISK_EVENT_MEDIA_CHANGE
: 0;
1615 scsi_disk_put(sdkp
);
1619 static int sd_sync_cache(struct scsi_disk
*sdkp
, struct scsi_sense_hdr
*sshdr
)
1622 struct scsi_device
*sdp
= sdkp
->device
;
1623 const int timeout
= sdp
->request_queue
->rq_timeout
1624 * SD_FLUSH_TIMEOUT_MULTIPLIER
;
1625 struct scsi_sense_hdr my_sshdr
;
1627 if (!scsi_device_online(sdp
))
1630 /* caller might not be interested in sense, but we need it */
1634 for (retries
= 3; retries
> 0; --retries
) {
1635 unsigned char cmd
[10] = { 0 };
1637 cmd
[0] = SYNCHRONIZE_CACHE
;
1639 * Leave the rest of the command zero to indicate
1642 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, sshdr
,
1643 timeout
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
1649 sd_print_result(sdkp
, "Synchronize Cache(10) failed", res
);
1651 if (driver_byte(res
) == DRIVER_SENSE
)
1652 sd_print_sense_hdr(sdkp
, sshdr
);
1654 /* we need to evaluate the error return */
1655 if (scsi_sense_valid(sshdr
) &&
1656 (sshdr
->asc
== 0x3a || /* medium not present */
1657 sshdr
->asc
== 0x20)) /* invalid command */
1658 /* this is no error here */
1661 switch (host_byte(res
)) {
1662 /* ignore errors due to racing a disconnection */
1663 case DID_BAD_TARGET
:
1664 case DID_NO_CONNECT
:
1666 /* signal the upper layer it might try again */
1670 case DID_SOFT_ERROR
:
1679 static void sd_rescan(struct device
*dev
)
1681 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
1683 revalidate_disk(sdkp
->disk
);
1687 #ifdef CONFIG_COMPAT
1689 * This gets directly called from VFS. When the ioctl
1690 * is not recognized we go back to the other translation paths.
1692 static int sd_compat_ioctl(struct block_device
*bdev
, fmode_t mode
,
1693 unsigned int cmd
, unsigned long arg
)
1695 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1698 error
= scsi_ioctl_block_when_processing_errors(sdev
, cmd
,
1699 (mode
& FMODE_NDELAY
) != 0);
1704 * Let the static ioctl translation table take care of it.
1706 if (!sdev
->host
->hostt
->compat_ioctl
)
1707 return -ENOIOCTLCMD
;
1708 return sdev
->host
->hostt
->compat_ioctl(sdev
, cmd
, (void __user
*)arg
);
1712 static char sd_pr_type(enum pr_type type
)
1715 case PR_WRITE_EXCLUSIVE
:
1717 case PR_EXCLUSIVE_ACCESS
:
1719 case PR_WRITE_EXCLUSIVE_REG_ONLY
:
1721 case PR_EXCLUSIVE_ACCESS_REG_ONLY
:
1723 case PR_WRITE_EXCLUSIVE_ALL_REGS
:
1725 case PR_EXCLUSIVE_ACCESS_ALL_REGS
:
1732 static int sd_pr_command(struct block_device
*bdev
, u8 sa
,
1733 u64 key
, u64 sa_key
, u8 type
, u8 flags
)
1735 struct scsi_device
*sdev
= scsi_disk(bdev
->bd_disk
)->device
;
1736 struct scsi_sense_hdr sshdr
;
1738 u8 cmd
[16] = { 0, };
1739 u8 data
[24] = { 0, };
1741 cmd
[0] = PERSISTENT_RESERVE_OUT
;
1744 put_unaligned_be32(sizeof(data
), &cmd
[5]);
1746 put_unaligned_be64(key
, &data
[0]);
1747 put_unaligned_be64(sa_key
, &data
[8]);
1750 result
= scsi_execute_req(sdev
, cmd
, DMA_TO_DEVICE
, &data
, sizeof(data
),
1751 &sshdr
, SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
1753 if (driver_byte(result
) == DRIVER_SENSE
&&
1754 scsi_sense_valid(&sshdr
)) {
1755 sdev_printk(KERN_INFO
, sdev
, "PR command failed: %d\n", result
);
1756 scsi_print_sense_hdr(sdev
, NULL
, &sshdr
);
1762 static int sd_pr_register(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1765 if (flags
& ~PR_FL_IGNORE_KEY
)
1767 return sd_pr_command(bdev
, (flags
& PR_FL_IGNORE_KEY
) ? 0x06 : 0x00,
1768 old_key
, new_key
, 0,
1769 (1 << 0) /* APTPL */);
1772 static int sd_pr_reserve(struct block_device
*bdev
, u64 key
, enum pr_type type
,
1777 return sd_pr_command(bdev
, 0x01, key
, 0, sd_pr_type(type
), 0);
1780 static int sd_pr_release(struct block_device
*bdev
, u64 key
, enum pr_type type
)
1782 return sd_pr_command(bdev
, 0x02, key
, 0, sd_pr_type(type
), 0);
1785 static int sd_pr_preempt(struct block_device
*bdev
, u64 old_key
, u64 new_key
,
1786 enum pr_type type
, bool abort
)
1788 return sd_pr_command(bdev
, abort
? 0x05 : 0x04, old_key
, new_key
,
1789 sd_pr_type(type
), 0);
1792 static int sd_pr_clear(struct block_device
*bdev
, u64 key
)
1794 return sd_pr_command(bdev
, 0x03, key
, 0, 0, 0);
1797 static const struct pr_ops sd_pr_ops
= {
1798 .pr_register
= sd_pr_register
,
1799 .pr_reserve
= sd_pr_reserve
,
1800 .pr_release
= sd_pr_release
,
1801 .pr_preempt
= sd_pr_preempt
,
1802 .pr_clear
= sd_pr_clear
,
1805 static const struct block_device_operations sd_fops
= {
1806 .owner
= THIS_MODULE
,
1808 .release
= sd_release
,
1810 .getgeo
= sd_getgeo
,
1811 #ifdef CONFIG_COMPAT
1812 .compat_ioctl
= sd_compat_ioctl
,
1814 .check_events
= sd_check_events
,
1815 .revalidate_disk
= sd_revalidate_disk
,
1816 .unlock_native_capacity
= sd_unlock_native_capacity
,
1817 .report_zones
= sd_zbc_report_zones
,
1818 .pr_ops
= &sd_pr_ops
,
1822 * sd_eh_reset - reset error handling callback
1823 * @scmd: sd-issued command that has failed
1825 * This function is called by the SCSI midlayer before starting
1826 * SCSI EH. When counting medium access failures we have to be
1827 * careful to register it only only once per device and SCSI EH run;
1828 * there might be several timed out commands which will cause the
1829 * 'max_medium_access_timeouts' counter to trigger after the first
1830 * SCSI EH run already and set the device to offline.
1831 * So this function resets the internal counter before starting SCSI EH.
1833 static void sd_eh_reset(struct scsi_cmnd
*scmd
)
1835 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1837 /* New SCSI EH run, reset gate variable */
1838 sdkp
->ignore_medium_access_errors
= false;
1842 * sd_eh_action - error handling callback
1843 * @scmd: sd-issued command that has failed
1844 * @eh_disp: The recovery disposition suggested by the midlayer
1846 * This function is called by the SCSI midlayer upon completion of an
1847 * error test command (currently TEST UNIT READY). The result of sending
1848 * the eh command is passed in eh_disp. We're looking for devices that
1849 * fail medium access commands but are OK with non access commands like
1850 * test unit ready (so wrongly see the device as having a successful
1853 static int sd_eh_action(struct scsi_cmnd
*scmd
, int eh_disp
)
1855 struct scsi_disk
*sdkp
= scsi_disk(scmd
->request
->rq_disk
);
1856 struct scsi_device
*sdev
= scmd
->device
;
1858 if (!scsi_device_online(sdev
) ||
1859 !scsi_medium_access_command(scmd
) ||
1860 host_byte(scmd
->result
) != DID_TIME_OUT
||
1865 * The device has timed out executing a medium access command.
1866 * However, the TEST UNIT READY command sent during error
1867 * handling completed successfully. Either the device is in the
1868 * process of recovering or has it suffered an internal failure
1869 * that prevents access to the storage medium.
1871 if (!sdkp
->ignore_medium_access_errors
) {
1872 sdkp
->medium_access_timed_out
++;
1873 sdkp
->ignore_medium_access_errors
= true;
1877 * If the device keeps failing read/write commands but TEST UNIT
1878 * READY always completes successfully we assume that medium
1879 * access is no longer possible and take the device offline.
1881 if (sdkp
->medium_access_timed_out
>= sdkp
->max_medium_access_timeouts
) {
1882 scmd_printk(KERN_ERR
, scmd
,
1883 "Medium access timeout failure. Offlining disk!\n");
1884 mutex_lock(&sdev
->state_mutex
);
1885 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
1886 mutex_unlock(&sdev
->state_mutex
);
1894 static unsigned int sd_completed_bytes(struct scsi_cmnd
*scmd
)
1896 struct request
*req
= scmd
->request
;
1897 struct scsi_device
*sdev
= scmd
->device
;
1898 unsigned int transferred
, good_bytes
;
1899 u64 start_lba
, end_lba
, bad_lba
;
1902 * Some commands have a payload smaller than the device logical
1903 * block size (e.g. INQUIRY on a 4K disk).
1905 if (scsi_bufflen(scmd
) <= sdev
->sector_size
)
1908 /* Check if we have a 'bad_lba' information */
1909 if (!scsi_get_sense_info_fld(scmd
->sense_buffer
,
1910 SCSI_SENSE_BUFFERSIZE
,
1915 * If the bad lba was reported incorrectly, we have no idea where
1918 start_lba
= sectors_to_logical(sdev
, blk_rq_pos(req
));
1919 end_lba
= start_lba
+ bytes_to_logical(sdev
, scsi_bufflen(scmd
));
1920 if (bad_lba
< start_lba
|| bad_lba
>= end_lba
)
1924 * resid is optional but mostly filled in. When it's unused,
1925 * its value is zero, so we assume the whole buffer transferred
1927 transferred
= scsi_bufflen(scmd
) - scsi_get_resid(scmd
);
1929 /* This computation should always be done in terms of the
1930 * resolution of the device's medium.
1932 good_bytes
= logical_to_bytes(sdev
, bad_lba
- start_lba
);
1934 return min(good_bytes
, transferred
);
1938 * sd_done - bottom half handler: called when the lower level
1939 * driver has completed (successfully or otherwise) a scsi command.
1940 * @SCpnt: mid-level's per command structure.
1942 * Note: potentially run from within an ISR. Must not block.
1944 static int sd_done(struct scsi_cmnd
*SCpnt
)
1946 int result
= SCpnt
->result
;
1947 unsigned int good_bytes
= result
? 0 : scsi_bufflen(SCpnt
);
1948 unsigned int sector_size
= SCpnt
->device
->sector_size
;
1950 struct scsi_sense_hdr sshdr
;
1951 struct scsi_disk
*sdkp
= scsi_disk(SCpnt
->request
->rq_disk
);
1952 struct request
*req
= SCpnt
->request
;
1953 int sense_valid
= 0;
1954 int sense_deferred
= 0;
1956 switch (req_op(req
)) {
1957 case REQ_OP_DISCARD
:
1958 case REQ_OP_WRITE_ZEROES
:
1959 case REQ_OP_WRITE_SAME
:
1960 case REQ_OP_ZONE_RESET
:
1961 case REQ_OP_ZONE_RESET_ALL
:
1963 good_bytes
= blk_rq_bytes(req
);
1964 scsi_set_resid(SCpnt
, 0);
1967 scsi_set_resid(SCpnt
, blk_rq_bytes(req
));
1972 * In case of bogus fw or device, we could end up having
1973 * an unaligned partial completion. Check this here and force
1976 resid
= scsi_get_resid(SCpnt
);
1977 if (resid
& (sector_size
- 1)) {
1978 sd_printk(KERN_INFO
, sdkp
,
1979 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1980 resid
, sector_size
);
1981 scsi_print_command(SCpnt
);
1982 resid
= min(scsi_bufflen(SCpnt
),
1983 round_up(resid
, sector_size
));
1984 scsi_set_resid(SCpnt
, resid
);
1989 sense_valid
= scsi_command_normalize_sense(SCpnt
, &sshdr
);
1991 sense_deferred
= scsi_sense_is_deferred(&sshdr
);
1993 sdkp
->medium_access_timed_out
= 0;
1995 if (driver_byte(result
) != DRIVER_SENSE
&&
1996 (!sense_valid
|| sense_deferred
))
1999 switch (sshdr
.sense_key
) {
2000 case HARDWARE_ERROR
:
2002 good_bytes
= sd_completed_bytes(SCpnt
);
2004 case RECOVERED_ERROR
:
2005 good_bytes
= scsi_bufflen(SCpnt
);
2008 /* This indicates a false check condition, so ignore it. An
2009 * unknown amount of data was transferred so treat it as an
2013 memset(SCpnt
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2015 case ABORTED_COMMAND
:
2016 if (sshdr
.asc
== 0x10) /* DIF: Target detected corruption */
2017 good_bytes
= sd_completed_bytes(SCpnt
);
2019 case ILLEGAL_REQUEST
:
2020 switch (sshdr
.asc
) {
2021 case 0x10: /* DIX: Host detected corruption */
2022 good_bytes
= sd_completed_bytes(SCpnt
);
2024 case 0x20: /* INVALID COMMAND OPCODE */
2025 case 0x24: /* INVALID FIELD IN CDB */
2026 switch (SCpnt
->cmnd
[0]) {
2028 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2032 if (SCpnt
->cmnd
[1] & 8) { /* UNMAP */
2033 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2035 sdkp
->device
->no_write_same
= 1;
2036 sd_config_write_same(sdkp
);
2037 req
->rq_flags
|= RQF_QUIET
;
2048 if (sd_is_zoned(sdkp
))
2049 sd_zbc_complete(SCpnt
, good_bytes
, &sshdr
);
2051 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO
, SCpnt
,
2052 "sd_done: completed %d of %d bytes\n",
2053 good_bytes
, scsi_bufflen(SCpnt
)));
2059 * spinup disk - called only in sd_revalidate_disk()
2062 sd_spinup_disk(struct scsi_disk
*sdkp
)
2064 unsigned char cmd
[10];
2065 unsigned long spintime_expire
= 0;
2066 int retries
, spintime
;
2067 unsigned int the_result
;
2068 struct scsi_sense_hdr sshdr
;
2069 int sense_valid
= 0;
2073 /* Spin up drives, as required. Only do this at boot time */
2074 /* Spinup needs to be done for module loads too. */
2079 cmd
[0] = TEST_UNIT_READY
;
2080 memset((void *) &cmd
[1], 0, 9);
2082 the_result
= scsi_execute_req(sdkp
->device
, cmd
,
2085 SD_MAX_RETRIES
, NULL
);
2088 * If the drive has indicated to us that it
2089 * doesn't have any media in it, don't bother
2090 * with any more polling.
2092 if (media_not_present(sdkp
, &sshdr
))
2096 sense_valid
= scsi_sense_valid(&sshdr
);
2098 } while (retries
< 3 &&
2099 (!scsi_status_is_good(the_result
) ||
2100 ((driver_byte(the_result
) == DRIVER_SENSE
) &&
2101 sense_valid
&& sshdr
.sense_key
== UNIT_ATTENTION
)));
2103 if (driver_byte(the_result
) != DRIVER_SENSE
) {
2104 /* no sense, TUR either succeeded or failed
2105 * with a status error */
2106 if(!spintime
&& !scsi_status_is_good(the_result
)) {
2107 sd_print_result(sdkp
, "Test Unit Ready failed",
2114 * The device does not want the automatic start to be issued.
2116 if (sdkp
->device
->no_start_on_add
)
2119 if (sense_valid
&& sshdr
.sense_key
== NOT_READY
) {
2120 if (sshdr
.asc
== 4 && sshdr
.ascq
== 3)
2121 break; /* manual intervention required */
2122 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xb)
2123 break; /* standby */
2124 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0xc)
2125 break; /* unavailable */
2126 if (sshdr
.asc
== 4 && sshdr
.ascq
== 0x1b)
2127 break; /* sanitize in progress */
2129 * Issue command to spin up drive when not ready
2132 sd_printk(KERN_NOTICE
, sdkp
, "Spinning up disk...");
2133 cmd
[0] = START_STOP
;
2134 cmd
[1] = 1; /* Return immediately */
2135 memset((void *) &cmd
[2], 0, 8);
2136 cmd
[4] = 1; /* Start spin cycle */
2137 if (sdkp
->device
->start_stop_pwr_cond
)
2139 scsi_execute_req(sdkp
->device
, cmd
, DMA_NONE
,
2141 SD_TIMEOUT
, SD_MAX_RETRIES
,
2143 spintime_expire
= jiffies
+ 100 * HZ
;
2146 /* Wait 1 second for next try */
2148 printk(KERN_CONT
".");
2151 * Wait for USB flash devices with slow firmware.
2152 * Yes, this sense key/ASC combination shouldn't
2153 * occur here. It's characteristic of these devices.
2155 } else if (sense_valid
&&
2156 sshdr
.sense_key
== UNIT_ATTENTION
&&
2157 sshdr
.asc
== 0x28) {
2159 spintime_expire
= jiffies
+ 5 * HZ
;
2162 /* Wait 1 second for next try */
2165 /* we don't understand the sense code, so it's
2166 * probably pointless to loop */
2168 sd_printk(KERN_NOTICE
, sdkp
, "Unit Not Ready\n");
2169 sd_print_sense_hdr(sdkp
, &sshdr
);
2174 } while (spintime
&& time_before_eq(jiffies
, spintime_expire
));
2177 if (scsi_status_is_good(the_result
))
2178 printk(KERN_CONT
"ready\n");
2180 printk(KERN_CONT
"not responding...\n");
2185 * Determine whether disk supports Data Integrity Field.
2187 static int sd_read_protection_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2189 struct scsi_device
*sdp
= sdkp
->device
;
2193 if (scsi_device_protection(sdp
) == 0 || (buffer
[12] & 1) == 0)
2196 type
= ((buffer
[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2198 if (type
> T10_PI_TYPE3_PROTECTION
)
2200 else if (scsi_host_dif_capable(sdp
->host
, type
))
2203 if (sdkp
->first_scan
|| type
!= sdkp
->protection_type
)
2206 sd_printk(KERN_ERR
, sdkp
, "formatted with unsupported" \
2207 " protection type %u. Disabling disk!\n",
2211 sd_printk(KERN_NOTICE
, sdkp
,
2212 "Enabling DIF Type %u protection\n", type
);
2215 sd_printk(KERN_NOTICE
, sdkp
,
2216 "Disabling DIF Type %u protection\n", type
);
2220 sdkp
->protection_type
= type
;
2225 static void read_capacity_error(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2226 struct scsi_sense_hdr
*sshdr
, int sense_valid
,
2229 if (driver_byte(the_result
) == DRIVER_SENSE
)
2230 sd_print_sense_hdr(sdkp
, sshdr
);
2232 sd_printk(KERN_NOTICE
, sdkp
, "Sense not available.\n");
2235 * Set dirty bit for removable devices if not ready -
2236 * sometimes drives will not report this properly.
2238 if (sdp
->removable
&&
2239 sense_valid
&& sshdr
->sense_key
== NOT_READY
)
2240 set_media_not_present(sdkp
);
2243 * We used to set media_present to 0 here to indicate no media
2244 * in the drive, but some drives fail read capacity even with
2245 * media present, so we can't do that.
2247 sdkp
->capacity
= 0; /* unknown mapped to zero - as usual */
2251 #if RC16_LEN > SD_BUF_SIZE
2252 #error RC16_LEN must not be more than SD_BUF_SIZE
2255 #define READ_CAPACITY_RETRIES_ON_RESET 10
2257 static int read_capacity_16(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2258 unsigned char *buffer
)
2260 unsigned char cmd
[16];
2261 struct scsi_sense_hdr sshdr
;
2262 int sense_valid
= 0;
2264 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2265 unsigned int alignment
;
2266 unsigned long long lba
;
2267 unsigned sector_size
;
2269 if (sdp
->no_read_capacity_16
)
2274 cmd
[0] = SERVICE_ACTION_IN_16
;
2275 cmd
[1] = SAI_READ_CAPACITY_16
;
2277 memset(buffer
, 0, RC16_LEN
);
2279 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2280 buffer
, RC16_LEN
, &sshdr
,
2281 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2283 if (media_not_present(sdkp
, &sshdr
))
2287 sense_valid
= scsi_sense_valid(&sshdr
);
2289 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2290 (sshdr
.asc
== 0x20 || sshdr
.asc
== 0x24) &&
2292 /* Invalid Command Operation Code or
2293 * Invalid Field in CDB, just retry
2294 * silently with RC10 */
2297 sshdr
.sense_key
== UNIT_ATTENTION
&&
2298 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2299 /* Device reset might occur several times,
2300 * give it one more chance */
2301 if (--reset_retries
> 0)
2306 } while (the_result
&& retries
);
2309 sd_print_result(sdkp
, "Read Capacity(16) failed", the_result
);
2310 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2314 sector_size
= get_unaligned_be32(&buffer
[8]);
2315 lba
= get_unaligned_be64(&buffer
[0]);
2317 if (sd_read_protection_type(sdkp
, buffer
) < 0) {
2322 /* Logical blocks per physical block exponent */
2323 sdkp
->physical_block_size
= (1 << (buffer
[13] & 0xf)) * sector_size
;
2326 sdkp
->rc_basis
= (buffer
[12] >> 4) & 0x3;
2328 /* Lowest aligned logical block */
2329 alignment
= ((buffer
[14] & 0x3f) << 8 | buffer
[15]) * sector_size
;
2330 blk_queue_alignment_offset(sdp
->request_queue
, alignment
);
2331 if (alignment
&& sdkp
->first_scan
)
2332 sd_printk(KERN_NOTICE
, sdkp
,
2333 "physical block alignment offset: %u\n", alignment
);
2335 if (buffer
[14] & 0x80) { /* LBPME */
2338 if (buffer
[14] & 0x40) /* LBPRZ */
2341 sd_config_discard(sdkp
, SD_LBP_WS16
);
2344 sdkp
->capacity
= lba
+ 1;
2348 static int read_capacity_10(struct scsi_disk
*sdkp
, struct scsi_device
*sdp
,
2349 unsigned char *buffer
)
2351 unsigned char cmd
[16];
2352 struct scsi_sense_hdr sshdr
;
2353 int sense_valid
= 0;
2355 int retries
= 3, reset_retries
= READ_CAPACITY_RETRIES_ON_RESET
;
2357 unsigned sector_size
;
2360 cmd
[0] = READ_CAPACITY
;
2361 memset(&cmd
[1], 0, 9);
2362 memset(buffer
, 0, 8);
2364 the_result
= scsi_execute_req(sdp
, cmd
, DMA_FROM_DEVICE
,
2366 SD_TIMEOUT
, SD_MAX_RETRIES
, NULL
);
2368 if (media_not_present(sdkp
, &sshdr
))
2372 sense_valid
= scsi_sense_valid(&sshdr
);
2374 sshdr
.sense_key
== UNIT_ATTENTION
&&
2375 sshdr
.asc
== 0x29 && sshdr
.ascq
== 0x00)
2376 /* Device reset might occur several times,
2377 * give it one more chance */
2378 if (--reset_retries
> 0)
2383 } while (the_result
&& retries
);
2386 sd_print_result(sdkp
, "Read Capacity(10) failed", the_result
);
2387 read_capacity_error(sdkp
, sdp
, &sshdr
, sense_valid
, the_result
);
2391 sector_size
= get_unaligned_be32(&buffer
[4]);
2392 lba
= get_unaligned_be32(&buffer
[0]);
2394 if (sdp
->no_read_capacity_16
&& (lba
== 0xffffffff)) {
2395 /* Some buggy (usb cardreader) devices return an lba of
2396 0xffffffff when the want to report a size of 0 (with
2397 which they really mean no media is present) */
2399 sdkp
->physical_block_size
= sector_size
;
2403 sdkp
->capacity
= lba
+ 1;
2404 sdkp
->physical_block_size
= sector_size
;
2408 static int sd_try_rc16_first(struct scsi_device
*sdp
)
2410 if (sdp
->host
->max_cmd_len
< 16)
2412 if (sdp
->try_rc_10_first
)
2414 if (sdp
->scsi_level
> SCSI_SPC_2
)
2416 if (scsi_device_protection(sdp
))
2422 * read disk capacity
2425 sd_read_capacity(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2428 struct scsi_device
*sdp
= sdkp
->device
;
2430 if (sd_try_rc16_first(sdp
)) {
2431 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2432 if (sector_size
== -EOVERFLOW
)
2434 if (sector_size
== -ENODEV
)
2436 if (sector_size
< 0)
2437 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2438 if (sector_size
< 0)
2441 sector_size
= read_capacity_10(sdkp
, sdp
, buffer
);
2442 if (sector_size
== -EOVERFLOW
)
2444 if (sector_size
< 0)
2446 if ((sizeof(sdkp
->capacity
) > 4) &&
2447 (sdkp
->capacity
> 0xffffffffULL
)) {
2448 int old_sector_size
= sector_size
;
2449 sd_printk(KERN_NOTICE
, sdkp
, "Very big device. "
2450 "Trying to use READ CAPACITY(16).\n");
2451 sector_size
= read_capacity_16(sdkp
, sdp
, buffer
);
2452 if (sector_size
< 0) {
2453 sd_printk(KERN_NOTICE
, sdkp
,
2454 "Using 0xffffffff as device size\n");
2455 sdkp
->capacity
= 1 + (sector_t
) 0xffffffff;
2456 sector_size
= old_sector_size
;
2459 /* Remember that READ CAPACITY(16) succeeded */
2460 sdp
->try_rc_10_first
= 0;
2464 /* Some devices are known to return the total number of blocks,
2465 * not the highest block number. Some devices have versions
2466 * which do this and others which do not. Some devices we might
2467 * suspect of doing this but we don't know for certain.
2469 * If we know the reported capacity is wrong, decrement it. If
2470 * we can only guess, then assume the number of blocks is even
2471 * (usually true but not always) and err on the side of lowering
2474 if (sdp
->fix_capacity
||
2475 (sdp
->guess_capacity
&& (sdkp
->capacity
& 0x01))) {
2476 sd_printk(KERN_INFO
, sdkp
, "Adjusting the sector count "
2477 "from its reported value: %llu\n",
2478 (unsigned long long) sdkp
->capacity
);
2483 if (sector_size
== 0) {
2485 sd_printk(KERN_NOTICE
, sdkp
, "Sector size 0 reported, "
2489 if (sector_size
!= 512 &&
2490 sector_size
!= 1024 &&
2491 sector_size
!= 2048 &&
2492 sector_size
!= 4096) {
2493 sd_printk(KERN_NOTICE
, sdkp
, "Unsupported sector size %d.\n",
2496 * The user might want to re-format the drive with
2497 * a supported sectorsize. Once this happens, it
2498 * would be relatively trivial to set the thing up.
2499 * For this reason, we leave the thing in the table.
2503 * set a bogus sector size so the normal read/write
2504 * logic in the block layer will eventually refuse any
2505 * request on this device without tripping over power
2506 * of two sector size assumptions
2510 blk_queue_logical_block_size(sdp
->request_queue
, sector_size
);
2511 blk_queue_physical_block_size(sdp
->request_queue
,
2512 sdkp
->physical_block_size
);
2513 sdkp
->device
->sector_size
= sector_size
;
2515 if (sdkp
->capacity
> 0xffffffff)
2516 sdp
->use_16_for_rw
= 1;
2521 * Print disk capacity
2524 sd_print_capacity(struct scsi_disk
*sdkp
,
2525 sector_t old_capacity
)
2527 int sector_size
= sdkp
->device
->sector_size
;
2528 char cap_str_2
[10], cap_str_10
[10];
2530 if (!sdkp
->first_scan
&& old_capacity
== sdkp
->capacity
)
2533 string_get_size(sdkp
->capacity
, sector_size
,
2534 STRING_UNITS_2
, cap_str_2
, sizeof(cap_str_2
));
2535 string_get_size(sdkp
->capacity
, sector_size
,
2536 STRING_UNITS_10
, cap_str_10
, sizeof(cap_str_10
));
2538 sd_printk(KERN_NOTICE
, sdkp
,
2539 "%llu %d-byte logical blocks: (%s/%s)\n",
2540 (unsigned long long)sdkp
->capacity
,
2541 sector_size
, cap_str_10
, cap_str_2
);
2543 if (sdkp
->physical_block_size
!= sector_size
)
2544 sd_printk(KERN_NOTICE
, sdkp
,
2545 "%u-byte physical blocks\n",
2546 sdkp
->physical_block_size
);
2548 sd_zbc_print_zones(sdkp
);
2551 /* called with buffer of length 512 */
2553 sd_do_mode_sense(struct scsi_device
*sdp
, int dbd
, int modepage
,
2554 unsigned char *buffer
, int len
, struct scsi_mode_data
*data
,
2555 struct scsi_sense_hdr
*sshdr
)
2557 return scsi_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2558 SD_TIMEOUT
, SD_MAX_RETRIES
, data
,
2563 * read write protect setting, if possible - called only in sd_revalidate_disk()
2564 * called with buffer of length SD_BUF_SIZE
2567 sd_read_write_protect_flag(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2570 struct scsi_device
*sdp
= sdkp
->device
;
2571 struct scsi_mode_data data
;
2572 int old_wp
= sdkp
->write_prot
;
2574 set_disk_ro(sdkp
->disk
, 0);
2575 if (sdp
->skip_ms_page_3f
) {
2576 sd_first_printk(KERN_NOTICE
, sdkp
, "Assuming Write Enabled\n");
2580 if (sdp
->use_192_bytes_for_3f
) {
2581 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 192, &data
, NULL
);
2584 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2585 * We have to start carefully: some devices hang if we ask
2586 * for more than is available.
2588 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 4, &data
, NULL
);
2591 * Second attempt: ask for page 0 When only page 0 is
2592 * implemented, a request for page 3F may return Sense Key
2593 * 5: Illegal Request, Sense Code 24: Invalid field in
2596 if (!scsi_status_is_good(res
))
2597 res
= sd_do_mode_sense(sdp
, 0, 0, buffer
, 4, &data
, NULL
);
2600 * Third attempt: ask 255 bytes, as we did earlier.
2602 if (!scsi_status_is_good(res
))
2603 res
= sd_do_mode_sense(sdp
, 0, 0x3F, buffer
, 255,
2607 if (!scsi_status_is_good(res
)) {
2608 sd_first_printk(KERN_WARNING
, sdkp
,
2609 "Test WP failed, assume Write Enabled\n");
2611 sdkp
->write_prot
= ((data
.device_specific
& 0x80) != 0);
2612 set_disk_ro(sdkp
->disk
, sdkp
->write_prot
);
2613 if (sdkp
->first_scan
|| old_wp
!= sdkp
->write_prot
) {
2614 sd_printk(KERN_NOTICE
, sdkp
, "Write Protect is %s\n",
2615 sdkp
->write_prot
? "on" : "off");
2616 sd_printk(KERN_DEBUG
, sdkp
, "Mode Sense: %4ph\n", buffer
);
2622 * sd_read_cache_type - called only from sd_revalidate_disk()
2623 * called with buffer of length SD_BUF_SIZE
2626 sd_read_cache_type(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2629 struct scsi_device
*sdp
= sdkp
->device
;
2634 struct scsi_mode_data data
;
2635 struct scsi_sense_hdr sshdr
;
2636 int old_wce
= sdkp
->WCE
;
2637 int old_rcd
= sdkp
->RCD
;
2638 int old_dpofua
= sdkp
->DPOFUA
;
2641 if (sdkp
->cache_override
)
2645 if (sdp
->skip_ms_page_8
) {
2646 if (sdp
->type
== TYPE_RBC
)
2649 if (sdp
->skip_ms_page_3f
)
2652 if (sdp
->use_192_bytes_for_3f
)
2656 } else if (sdp
->type
== TYPE_RBC
) {
2664 /* cautiously ask */
2665 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, first_len
,
2668 if (!scsi_status_is_good(res
))
2671 if (!data
.header_length
) {
2674 sd_first_printk(KERN_ERR
, sdkp
,
2675 "Missing header in MODE_SENSE response\n");
2678 /* that went OK, now ask for the proper length */
2682 * We're only interested in the first three bytes, actually.
2683 * But the data cache page is defined for the first 20.
2687 else if (len
> SD_BUF_SIZE
) {
2688 sd_first_printk(KERN_NOTICE
, sdkp
, "Truncating mode parameter "
2689 "data from %d to %d bytes\n", len
, SD_BUF_SIZE
);
2692 if (modepage
== 0x3F && sdp
->use_192_bytes_for_3f
)
2696 if (len
> first_len
)
2697 res
= sd_do_mode_sense(sdp
, dbd
, modepage
, buffer
, len
,
2700 if (scsi_status_is_good(res
)) {
2701 int offset
= data
.header_length
+ data
.block_descriptor_length
;
2703 while (offset
< len
) {
2704 u8 page_code
= buffer
[offset
] & 0x3F;
2705 u8 spf
= buffer
[offset
] & 0x40;
2707 if (page_code
== 8 || page_code
== 6) {
2708 /* We're interested only in the first 3 bytes.
2710 if (len
- offset
<= 2) {
2711 sd_first_printk(KERN_ERR
, sdkp
,
2712 "Incomplete mode parameter "
2716 modepage
= page_code
;
2720 /* Go to the next page */
2721 if (spf
&& len
- offset
> 3)
2722 offset
+= 4 + (buffer
[offset
+2] << 8) +
2724 else if (!spf
&& len
- offset
> 1)
2725 offset
+= 2 + buffer
[offset
+1];
2727 sd_first_printk(KERN_ERR
, sdkp
,
2729 "parameter data\n");
2735 sd_first_printk(KERN_ERR
, sdkp
, "No Caching mode page found\n");
2739 if (modepage
== 8) {
2740 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x04) != 0);
2741 sdkp
->RCD
= ((buffer
[offset
+ 2] & 0x01) != 0);
2743 sdkp
->WCE
= ((buffer
[offset
+ 2] & 0x01) == 0);
2747 sdkp
->DPOFUA
= (data
.device_specific
& 0x10) != 0;
2748 if (sdp
->broken_fua
) {
2749 sd_first_printk(KERN_NOTICE
, sdkp
, "Disabling FUA\n");
2751 } else if (sdkp
->DPOFUA
&& !sdkp
->device
->use_10_for_rw
&&
2752 !sdkp
->device
->use_16_for_rw
) {
2753 sd_first_printk(KERN_NOTICE
, sdkp
,
2754 "Uses READ/WRITE(6), disabling FUA\n");
2758 /* No cache flush allowed for write protected devices */
2759 if (sdkp
->WCE
&& sdkp
->write_prot
)
2762 if (sdkp
->first_scan
|| old_wce
!= sdkp
->WCE
||
2763 old_rcd
!= sdkp
->RCD
|| old_dpofua
!= sdkp
->DPOFUA
)
2764 sd_printk(KERN_NOTICE
, sdkp
,
2765 "Write cache: %s, read cache: %s, %s\n",
2766 sdkp
->WCE
? "enabled" : "disabled",
2767 sdkp
->RCD
? "disabled" : "enabled",
2768 sdkp
->DPOFUA
? "supports DPO and FUA"
2769 : "doesn't support DPO or FUA");
2775 if (scsi_sense_valid(&sshdr
) &&
2776 sshdr
.sense_key
== ILLEGAL_REQUEST
&&
2777 sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x0)
2778 /* Invalid field in CDB */
2779 sd_first_printk(KERN_NOTICE
, sdkp
, "Cache data unavailable\n");
2781 sd_first_printk(KERN_ERR
, sdkp
,
2782 "Asking for cache data failed\n");
2785 if (sdp
->wce_default_on
) {
2786 sd_first_printk(KERN_NOTICE
, sdkp
,
2787 "Assuming drive cache: write back\n");
2790 sd_first_printk(KERN_ERR
, sdkp
,
2791 "Assuming drive cache: write through\n");
2799 * The ATO bit indicates whether the DIF application tag is available
2800 * for use by the operating system.
2802 static void sd_read_app_tag_own(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2805 struct scsi_device
*sdp
= sdkp
->device
;
2806 struct scsi_mode_data data
;
2807 struct scsi_sense_hdr sshdr
;
2809 if (sdp
->type
!= TYPE_DISK
&& sdp
->type
!= TYPE_ZBC
)
2812 if (sdkp
->protection_type
== 0)
2815 res
= scsi_mode_sense(sdp
, 1, 0x0a, buffer
, 36, SD_TIMEOUT
,
2816 SD_MAX_RETRIES
, &data
, &sshdr
);
2818 if (!scsi_status_is_good(res
) || !data
.header_length
||
2820 sd_first_printk(KERN_WARNING
, sdkp
,
2821 "getting Control mode page failed, assume no ATO\n");
2823 if (scsi_sense_valid(&sshdr
))
2824 sd_print_sense_hdr(sdkp
, &sshdr
);
2829 offset
= data
.header_length
+ data
.block_descriptor_length
;
2831 if ((buffer
[offset
] & 0x3f) != 0x0a) {
2832 sd_first_printk(KERN_ERR
, sdkp
, "ATO Got wrong page\n");
2836 if ((buffer
[offset
+ 5] & 0x80) == 0)
2845 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2846 * @sdkp: disk to query
2848 static void sd_read_block_limits(struct scsi_disk
*sdkp
)
2850 unsigned int sector_sz
= sdkp
->device
->sector_size
;
2851 const int vpd_len
= 64;
2852 unsigned char *buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2855 /* Block Limits VPD */
2856 scsi_get_vpd_page(sdkp
->device
, 0xb0, buffer
, vpd_len
))
2859 blk_queue_io_min(sdkp
->disk
->queue
,
2860 get_unaligned_be16(&buffer
[6]) * sector_sz
);
2862 sdkp
->max_xfer_blocks
= get_unaligned_be32(&buffer
[8]);
2863 sdkp
->opt_xfer_blocks
= get_unaligned_be32(&buffer
[12]);
2865 if (buffer
[3] == 0x3c) {
2866 unsigned int lba_count
, desc_count
;
2868 sdkp
->max_ws_blocks
= (u32
)get_unaligned_be64(&buffer
[36]);
2873 lba_count
= get_unaligned_be32(&buffer
[20]);
2874 desc_count
= get_unaligned_be32(&buffer
[24]);
2876 if (lba_count
&& desc_count
)
2877 sdkp
->max_unmap_blocks
= lba_count
;
2879 sdkp
->unmap_granularity
= get_unaligned_be32(&buffer
[28]);
2881 if (buffer
[32] & 0x80)
2882 sdkp
->unmap_alignment
=
2883 get_unaligned_be32(&buffer
[32]) & ~(1 << 31);
2885 if (!sdkp
->lbpvpd
) { /* LBP VPD page not provided */
2887 if (sdkp
->max_unmap_blocks
)
2888 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2890 sd_config_discard(sdkp
, SD_LBP_WS16
);
2892 } else { /* LBP VPD page tells us what to use */
2893 if (sdkp
->lbpu
&& sdkp
->max_unmap_blocks
)
2894 sd_config_discard(sdkp
, SD_LBP_UNMAP
);
2895 else if (sdkp
->lbpws
)
2896 sd_config_discard(sdkp
, SD_LBP_WS16
);
2897 else if (sdkp
->lbpws10
)
2898 sd_config_discard(sdkp
, SD_LBP_WS10
);
2900 sd_config_discard(sdkp
, SD_LBP_DISABLE
);
2909 * sd_read_block_characteristics - Query block dev. characteristics
2910 * @sdkp: disk to query
2912 static void sd_read_block_characteristics(struct scsi_disk
*sdkp
)
2914 struct request_queue
*q
= sdkp
->disk
->queue
;
2915 unsigned char *buffer
;
2917 const int vpd_len
= 64;
2919 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2922 /* Block Device Characteristics VPD */
2923 scsi_get_vpd_page(sdkp
->device
, 0xb1, buffer
, vpd_len
))
2926 rot
= get_unaligned_be16(&buffer
[4]);
2929 blk_queue_flag_set(QUEUE_FLAG_NONROT
, q
);
2930 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM
, q
);
2933 if (sdkp
->device
->type
== TYPE_ZBC
) {
2935 q
->limits
.zoned
= BLK_ZONED_HM
;
2937 sdkp
->zoned
= (buffer
[8] >> 4) & 3;
2938 if (sdkp
->zoned
== 1)
2940 q
->limits
.zoned
= BLK_ZONED_HA
;
2943 * Treat drive-managed devices as
2944 * regular block devices.
2946 q
->limits
.zoned
= BLK_ZONED_NONE
;
2948 if (blk_queue_is_zoned(q
) && sdkp
->first_scan
)
2949 sd_printk(KERN_NOTICE
, sdkp
, "Host-%s zoned block device\n",
2950 q
->limits
.zoned
== BLK_ZONED_HM
? "managed" : "aware");
2957 * sd_read_block_provisioning - Query provisioning VPD page
2958 * @sdkp: disk to query
2960 static void sd_read_block_provisioning(struct scsi_disk
*sdkp
)
2962 unsigned char *buffer
;
2963 const int vpd_len
= 8;
2965 if (sdkp
->lbpme
== 0)
2968 buffer
= kmalloc(vpd_len
, GFP_KERNEL
);
2970 if (!buffer
|| scsi_get_vpd_page(sdkp
->device
, 0xb2, buffer
, vpd_len
))
2974 sdkp
->lbpu
= (buffer
[5] >> 7) & 1; /* UNMAP */
2975 sdkp
->lbpws
= (buffer
[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2976 sdkp
->lbpws10
= (buffer
[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
2982 static void sd_read_write_same(struct scsi_disk
*sdkp
, unsigned char *buffer
)
2984 struct scsi_device
*sdev
= sdkp
->device
;
2986 if (sdev
->host
->no_write_same
) {
2987 sdev
->no_write_same
= 1;
2992 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, INQUIRY
) < 0) {
2993 /* too large values might cause issues with arcmsr */
2994 int vpd_buf_len
= 64;
2996 sdev
->no_report_opcodes
= 1;
2998 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
2999 * CODES is unsupported and the device has an ATA
3000 * Information VPD page (SAT).
3002 if (!scsi_get_vpd_page(sdev
, 0x89, buffer
, vpd_buf_len
))
3003 sdev
->no_write_same
= 1;
3006 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME_16
) == 1)
3009 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
, WRITE_SAME
) == 1)
3013 static void sd_read_security(struct scsi_disk
*sdkp
, unsigned char *buffer
)
3015 struct scsi_device
*sdev
= sdkp
->device
;
3017 if (!sdev
->security_supported
)
3020 if (scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3021 SECURITY_PROTOCOL_IN
) == 1 &&
3022 scsi_report_opcode(sdev
, buffer
, SD_BUF_SIZE
,
3023 SECURITY_PROTOCOL_OUT
) == 1)
3028 * Determine the device's preferred I/O size for reads and writes
3029 * unless the reported value is unreasonably small, large, not a
3030 * multiple of the physical block size, or simply garbage.
3032 static bool sd_validate_opt_xfer_size(struct scsi_disk
*sdkp
,
3033 unsigned int dev_max
)
3035 struct scsi_device
*sdp
= sdkp
->device
;
3036 unsigned int opt_xfer_bytes
=
3037 logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3039 if (sdkp
->opt_xfer_blocks
== 0)
3042 if (sdkp
->opt_xfer_blocks
> dev_max
) {
3043 sd_first_printk(KERN_WARNING
, sdkp
,
3044 "Optimal transfer size %u logical blocks " \
3045 "> dev_max (%u logical blocks)\n",
3046 sdkp
->opt_xfer_blocks
, dev_max
);
3050 if (sdkp
->opt_xfer_blocks
> SD_DEF_XFER_BLOCKS
) {
3051 sd_first_printk(KERN_WARNING
, sdkp
,
3052 "Optimal transfer size %u logical blocks " \
3053 "> sd driver limit (%u logical blocks)\n",
3054 sdkp
->opt_xfer_blocks
, SD_DEF_XFER_BLOCKS
);
3058 if (opt_xfer_bytes
< PAGE_SIZE
) {
3059 sd_first_printk(KERN_WARNING
, sdkp
,
3060 "Optimal transfer size %u bytes < " \
3061 "PAGE_SIZE (%u bytes)\n",
3062 opt_xfer_bytes
, (unsigned int)PAGE_SIZE
);
3066 if (opt_xfer_bytes
& (sdkp
->physical_block_size
- 1)) {
3067 sd_first_printk(KERN_WARNING
, sdkp
,
3068 "Optimal transfer size %u bytes not a " \
3069 "multiple of physical block size (%u bytes)\n",
3070 opt_xfer_bytes
, sdkp
->physical_block_size
);
3074 sd_first_printk(KERN_INFO
, sdkp
, "Optimal transfer size %u bytes\n",
3080 * sd_revalidate_disk - called the first time a new disk is seen,
3081 * performs disk spin up, read_capacity, etc.
3082 * @disk: struct gendisk we care about
3084 static int sd_revalidate_disk(struct gendisk
*disk
)
3086 struct scsi_disk
*sdkp
= scsi_disk(disk
);
3087 struct scsi_device
*sdp
= sdkp
->device
;
3088 struct request_queue
*q
= sdkp
->disk
->queue
;
3089 sector_t old_capacity
= sdkp
->capacity
;
3090 unsigned char *buffer
;
3091 unsigned int dev_max
, rw_max
;
3093 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO
, sdkp
,
3094 "sd_revalidate_disk\n"));
3097 * If the device is offline, don't try and read capacity or any
3098 * of the other niceties.
3100 if (!scsi_device_online(sdp
))
3103 buffer
= kmalloc(SD_BUF_SIZE
, GFP_KERNEL
);
3105 sd_printk(KERN_WARNING
, sdkp
, "sd_revalidate_disk: Memory "
3106 "allocation failure.\n");
3110 sd_spinup_disk(sdkp
);
3113 * Without media there is no reason to ask; moreover, some devices
3114 * react badly if we do.
3116 if (sdkp
->media_present
) {
3117 sd_read_capacity(sdkp
, buffer
);
3120 * set the default to rotational. All non-rotational devices
3121 * support the block characteristics VPD page, which will
3122 * cause this to be updated correctly and any device which
3123 * doesn't support it should be treated as rotational.
3125 blk_queue_flag_clear(QUEUE_FLAG_NONROT
, q
);
3126 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM
, q
);
3128 if (scsi_device_supports_vpd(sdp
)) {
3129 sd_read_block_provisioning(sdkp
);
3130 sd_read_block_limits(sdkp
);
3131 sd_read_block_characteristics(sdkp
);
3132 sd_zbc_read_zones(sdkp
, buffer
);
3135 sd_print_capacity(sdkp
, old_capacity
);
3137 sd_read_write_protect_flag(sdkp
, buffer
);
3138 sd_read_cache_type(sdkp
, buffer
);
3139 sd_read_app_tag_own(sdkp
, buffer
);
3140 sd_read_write_same(sdkp
, buffer
);
3141 sd_read_security(sdkp
, buffer
);
3145 * We now have all cache related info, determine how we deal
3146 * with flush requests.
3148 sd_set_flush_flag(sdkp
);
3150 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3151 dev_max
= sdp
->use_16_for_rw
? SD_MAX_XFER_BLOCKS
: SD_DEF_XFER_BLOCKS
;
3153 /* Some devices report a maximum block count for READ/WRITE requests. */
3154 dev_max
= min_not_zero(dev_max
, sdkp
->max_xfer_blocks
);
3155 q
->limits
.max_dev_sectors
= logical_to_sectors(sdp
, dev_max
);
3157 if (sd_validate_opt_xfer_size(sdkp
, dev_max
)) {
3158 q
->limits
.io_opt
= logical_to_bytes(sdp
, sdkp
->opt_xfer_blocks
);
3159 rw_max
= logical_to_sectors(sdp
, sdkp
->opt_xfer_blocks
);
3161 rw_max
= min_not_zero(logical_to_sectors(sdp
, dev_max
),
3162 (sector_t
)BLK_DEF_MAX_SECTORS
);
3164 /* Do not exceed controller limit */
3165 rw_max
= min(rw_max
, queue_max_hw_sectors(q
));
3168 * Only update max_sectors if previously unset or if the current value
3169 * exceeds the capabilities of the hardware.
3171 if (sdkp
->first_scan
||
3172 q
->limits
.max_sectors
> q
->limits
.max_dev_sectors
||
3173 q
->limits
.max_sectors
> q
->limits
.max_hw_sectors
)
3174 q
->limits
.max_sectors
= rw_max
;
3176 sdkp
->first_scan
= 0;
3178 set_capacity(disk
, logical_to_sectors(sdp
, sdkp
->capacity
));
3179 sd_config_write_same(sdkp
);
3187 * sd_unlock_native_capacity - unlock native capacity
3188 * @disk: struct gendisk to set capacity for
3190 * Block layer calls this function if it detects that partitions
3191 * on @disk reach beyond the end of the device. If the SCSI host
3192 * implements ->unlock_native_capacity() method, it's invoked to
3193 * give it a chance to adjust the device capacity.
3196 * Defined by block layer. Might sleep.
3198 static void sd_unlock_native_capacity(struct gendisk
*disk
)
3200 struct scsi_device
*sdev
= scsi_disk(disk
)->device
;
3202 if (sdev
->host
->hostt
->unlock_native_capacity
)
3203 sdev
->host
->hostt
->unlock_native_capacity(sdev
);
3207 * sd_format_disk_name - format disk name
3208 * @prefix: name prefix - ie. "sd" for SCSI disks
3209 * @index: index of the disk to format name for
3210 * @buf: output buffer
3211 * @buflen: length of the output buffer
3213 * SCSI disk names starts at sda. The 26th device is sdz and the
3214 * 27th is sdaa. The last one for two lettered suffix is sdzz
3215 * which is followed by sdaaa.
3217 * This is basically 26 base counting with one extra 'nil' entry
3218 * at the beginning from the second digit on and can be
3219 * determined using similar method as 26 base conversion with the
3220 * index shifted -1 after each digit is computed.
3226 * 0 on success, -errno on failure.
3228 static int sd_format_disk_name(char *prefix
, int index
, char *buf
, int buflen
)
3230 const int base
= 'z' - 'a' + 1;
3231 char *begin
= buf
+ strlen(prefix
);
3232 char *end
= buf
+ buflen
;
3242 *--p
= 'a' + (index
% unit
);
3243 index
= (index
/ unit
) - 1;
3244 } while (index
>= 0);
3246 memmove(begin
, p
, end
- p
);
3247 memcpy(buf
, prefix
, strlen(prefix
));
3253 * sd_probe - called during driver initialization and whenever a
3254 * new scsi device is attached to the system. It is called once
3255 * for each scsi device (not just disks) present.
3256 * @dev: pointer to device object
3258 * Returns 0 if successful (or not interested in this scsi device
3259 * (e.g. scanner)); 1 when there is an error.
3261 * Note: this function is invoked from the scsi mid-level.
3262 * This function sets up the mapping between a given
3263 * <host,channel,id,lun> (found in sdp) and new device name
3264 * (e.g. /dev/sda). More precisely it is the block device major
3265 * and minor number that is chosen here.
3267 * Assume sd_probe is not re-entrant (for time being)
3268 * Also think about sd_probe() and sd_remove() running coincidentally.
3270 static int sd_probe(struct device
*dev
)
3272 struct scsi_device
*sdp
= to_scsi_device(dev
);
3273 struct scsi_disk
*sdkp
;
3278 scsi_autopm_get_device(sdp
);
3280 if (sdp
->type
!= TYPE_DISK
&&
3281 sdp
->type
!= TYPE_ZBC
&&
3282 sdp
->type
!= TYPE_MOD
&&
3283 sdp
->type
!= TYPE_RBC
)
3286 #ifndef CONFIG_BLK_DEV_ZONED
3287 if (sdp
->type
== TYPE_ZBC
)
3290 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO
, sdp
,
3294 sdkp
= kzalloc(sizeof(*sdkp
), GFP_KERNEL
);
3298 gd
= alloc_disk(SD_MINORS
);
3302 index
= ida_alloc(&sd_index_ida
, GFP_KERNEL
);
3304 sdev_printk(KERN_WARNING
, sdp
, "sd_probe: memory exhausted.\n");
3308 error
= sd_format_disk_name("sd", index
, gd
->disk_name
, DISK_NAME_LEN
);
3310 sdev_printk(KERN_WARNING
, sdp
, "SCSI disk (sd) name length exceeded.\n");
3311 goto out_free_index
;
3315 sdkp
->driver
= &sd_template
;
3317 sdkp
->index
= index
;
3318 atomic_set(&sdkp
->openers
, 0);
3319 atomic_set(&sdkp
->device
->ioerr_cnt
, 0);
3321 if (!sdp
->request_queue
->rq_timeout
) {
3322 if (sdp
->type
!= TYPE_MOD
)
3323 blk_queue_rq_timeout(sdp
->request_queue
, SD_TIMEOUT
);
3325 blk_queue_rq_timeout(sdp
->request_queue
,
3329 device_initialize(&sdkp
->dev
);
3330 sdkp
->dev
.parent
= dev
;
3331 sdkp
->dev
.class = &sd_disk_class
;
3332 dev_set_name(&sdkp
->dev
, "%s", dev_name(dev
));
3334 error
= device_add(&sdkp
->dev
);
3336 goto out_free_index
;
3339 dev_set_drvdata(dev
, sdkp
);
3341 gd
->major
= sd_major((index
& 0xf0) >> 4);
3342 gd
->first_minor
= ((index
& 0xf) << 4) | (index
& 0xfff00);
3344 gd
->fops
= &sd_fops
;
3345 gd
->private_data
= &sdkp
->driver
;
3346 gd
->queue
= sdkp
->device
->request_queue
;
3348 /* defaults, until the device tells us otherwise */
3349 sdp
->sector_size
= 512;
3351 sdkp
->media_present
= 1;
3352 sdkp
->write_prot
= 0;
3353 sdkp
->cache_override
= 0;
3357 sdkp
->first_scan
= 1;
3358 sdkp
->max_medium_access_timeouts
= SD_MAX_MEDIUM_TIMEOUTS
;
3360 sd_revalidate_disk(gd
);
3362 gd
->flags
= GENHD_FL_EXT_DEVT
;
3363 if (sdp
->removable
) {
3364 gd
->flags
|= GENHD_FL_REMOVABLE
;
3365 gd
->events
|= DISK_EVENT_MEDIA_CHANGE
;
3366 gd
->event_flags
= DISK_EVENT_FLAG_POLL
| DISK_EVENT_FLAG_UEVENT
;
3369 blk_pm_runtime_init(sdp
->request_queue
, dev
);
3370 device_add_disk(dev
, gd
, NULL
);
3372 sd_dif_config_host(sdkp
);
3374 sd_revalidate_disk(gd
);
3376 if (sdkp
->security
) {
3377 sdkp
->opal_dev
= init_opal_dev(sdp
, &sd_sec_submit
);
3379 sd_printk(KERN_NOTICE
, sdkp
, "supports TCG Opal\n");
3382 sd_printk(KERN_NOTICE
, sdkp
, "Attached SCSI %sdisk\n",
3383 sdp
->removable
? "removable " : "");
3384 scsi_autopm_put_device(sdp
);
3389 ida_free(&sd_index_ida
, index
);
3395 scsi_autopm_put_device(sdp
);
3400 * sd_remove - called whenever a scsi disk (previously recognized by
3401 * sd_probe) is detached from the system. It is called (potentially
3402 * multiple times) during sd module unload.
3403 * @dev: pointer to device object
3405 * Note: this function is invoked from the scsi mid-level.
3406 * This function potentially frees up a device name (e.g. /dev/sdc)
3407 * that could be re-used by a subsequent sd_probe().
3408 * This function is not called when the built-in sd driver is "exit-ed".
3410 static int sd_remove(struct device
*dev
)
3412 struct scsi_disk
*sdkp
;
3415 sdkp
= dev_get_drvdata(dev
);
3416 devt
= disk_devt(sdkp
->disk
);
3417 scsi_autopm_get_device(sdkp
->device
);
3419 async_synchronize_full_domain(&scsi_sd_pm_domain
);
3420 device_del(&sdkp
->dev
);
3421 del_gendisk(sdkp
->disk
);
3424 free_opal_dev(sdkp
->opal_dev
);
3426 blk_register_region(devt
, SD_MINORS
, NULL
,
3427 sd_default_probe
, NULL
, NULL
);
3429 mutex_lock(&sd_ref_mutex
);
3430 dev_set_drvdata(dev
, NULL
);
3431 put_device(&sdkp
->dev
);
3432 mutex_unlock(&sd_ref_mutex
);
3438 * scsi_disk_release - Called to free the scsi_disk structure
3439 * @dev: pointer to embedded class device
3441 * sd_ref_mutex must be held entering this routine. Because it is
3442 * called on last put, you should always use the scsi_disk_get()
3443 * scsi_disk_put() helpers which manipulate the semaphore directly
3444 * and never do a direct put_device.
3446 static void scsi_disk_release(struct device
*dev
)
3448 struct scsi_disk
*sdkp
= to_scsi_disk(dev
);
3449 struct gendisk
*disk
= sdkp
->disk
;
3450 struct request_queue
*q
= disk
->queue
;
3452 ida_free(&sd_index_ida
, sdkp
->index
);
3455 * Wait until all requests that are in progress have completed.
3456 * This is necessary to avoid that e.g. scsi_end_request() crashes
3457 * due to clearing the disk->private_data pointer. Wait from inside
3458 * scsi_disk_release() instead of from sd_release() to avoid that
3459 * freezing and unfreezing the request queue affects user space I/O
3460 * in case multiple processes open a /dev/sd... node concurrently.
3462 blk_mq_freeze_queue(q
);
3463 blk_mq_unfreeze_queue(q
);
3465 disk
->private_data
= NULL
;
3467 put_device(&sdkp
->device
->sdev_gendev
);
3472 static int sd_start_stop_device(struct scsi_disk
*sdkp
, int start
)
3474 unsigned char cmd
[6] = { START_STOP
}; /* START_VALID */
3475 struct scsi_sense_hdr sshdr
;
3476 struct scsi_device
*sdp
= sdkp
->device
;
3480 cmd
[4] |= 1; /* START */
3482 if (sdp
->start_stop_pwr_cond
)
3483 cmd
[4] |= start
? 1 << 4 : 3 << 4; /* Active or Standby */
3485 if (!scsi_device_online(sdp
))
3488 res
= scsi_execute(sdp
, cmd
, DMA_NONE
, NULL
, 0, NULL
, &sshdr
,
3489 SD_TIMEOUT
, SD_MAX_RETRIES
, 0, RQF_PM
, NULL
);
3491 sd_print_result(sdkp
, "Start/Stop Unit failed", res
);
3492 if (driver_byte(res
) == DRIVER_SENSE
)
3493 sd_print_sense_hdr(sdkp
, &sshdr
);
3494 if (scsi_sense_valid(&sshdr
) &&
3495 /* 0x3a is medium not present */
3500 /* SCSI error codes must not go to the generic layer */
3508 * Send a SYNCHRONIZE CACHE instruction down to the device through
3509 * the normal SCSI command structure. Wait for the command to
3512 static void sd_shutdown(struct device
*dev
)
3514 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3517 return; /* this can happen */
3519 if (pm_runtime_suspended(dev
))
3522 if (sdkp
->WCE
&& sdkp
->media_present
) {
3523 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3524 sd_sync_cache(sdkp
, NULL
);
3527 if (system_state
!= SYSTEM_RESTART
&& sdkp
->device
->manage_start_stop
) {
3528 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3529 sd_start_stop_device(sdkp
, 0);
3533 static int sd_suspend_common(struct device
*dev
, bool ignore_stop_errors
)
3535 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3536 struct scsi_sense_hdr sshdr
;
3539 if (!sdkp
) /* E.g.: runtime suspend following sd_remove() */
3542 if (sdkp
->WCE
&& sdkp
->media_present
) {
3543 sd_printk(KERN_NOTICE
, sdkp
, "Synchronizing SCSI cache\n");
3544 ret
= sd_sync_cache(sdkp
, &sshdr
);
3547 /* ignore OFFLINE device */
3551 if (!scsi_sense_valid(&sshdr
) ||
3552 sshdr
.sense_key
!= ILLEGAL_REQUEST
)
3556 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3557 * doesn't support sync. There's not much to do and
3558 * suspend shouldn't fail.
3564 if (sdkp
->device
->manage_start_stop
) {
3565 sd_printk(KERN_NOTICE
, sdkp
, "Stopping disk\n");
3566 /* an error is not worth aborting a system sleep */
3567 ret
= sd_start_stop_device(sdkp
, 0);
3568 if (ignore_stop_errors
)
3575 static int sd_suspend_system(struct device
*dev
)
3577 return sd_suspend_common(dev
, true);
3580 static int sd_suspend_runtime(struct device
*dev
)
3582 return sd_suspend_common(dev
, false);
3585 static int sd_resume(struct device
*dev
)
3587 struct scsi_disk
*sdkp
= dev_get_drvdata(dev
);
3590 if (!sdkp
) /* E.g.: runtime resume at the start of sd_probe() */
3593 if (!sdkp
->device
->manage_start_stop
)
3596 sd_printk(KERN_NOTICE
, sdkp
, "Starting disk\n");
3597 ret
= sd_start_stop_device(sdkp
, 1);
3599 opal_unlock_from_suspend(sdkp
->opal_dev
);
3604 * init_sd - entry point for this driver (both when built in or when
3607 * Note: this function registers this driver with the scsi mid-level.
3609 static int __init
init_sd(void)
3611 int majors
= 0, i
, err
;
3613 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3615 for (i
= 0; i
< SD_MAJORS
; i
++) {
3616 if (register_blkdev(sd_major(i
), "sd") != 0)
3619 blk_register_region(sd_major(i
), SD_MINORS
, NULL
,
3620 sd_default_probe
, NULL
, NULL
);
3626 err
= class_register(&sd_disk_class
);
3630 sd_cdb_cache
= kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE
,
3632 if (!sd_cdb_cache
) {
3633 printk(KERN_ERR
"sd: can't init extended cdb cache\n");
3638 sd_cdb_pool
= mempool_create_slab_pool(SD_MEMPOOL_SIZE
, sd_cdb_cache
);
3640 printk(KERN_ERR
"sd: can't init extended cdb pool\n");
3645 sd_page_pool
= mempool_create_page_pool(SD_MEMPOOL_SIZE
, 0);
3646 if (!sd_page_pool
) {
3647 printk(KERN_ERR
"sd: can't init discard page pool\n");
3652 err
= scsi_register_driver(&sd_template
.gendrv
);
3654 goto err_out_driver
;
3659 mempool_destroy(sd_page_pool
);
3662 mempool_destroy(sd_cdb_pool
);
3665 kmem_cache_destroy(sd_cdb_cache
);
3668 class_unregister(&sd_disk_class
);
3670 for (i
= 0; i
< SD_MAJORS
; i
++)
3671 unregister_blkdev(sd_major(i
), "sd");
3676 * exit_sd - exit point for this driver (when it is a module).
3678 * Note: this function unregisters this driver from the scsi mid-level.
3680 static void __exit
exit_sd(void)
3684 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3686 scsi_unregister_driver(&sd_template
.gendrv
);
3687 mempool_destroy(sd_cdb_pool
);
3688 mempool_destroy(sd_page_pool
);
3689 kmem_cache_destroy(sd_cdb_cache
);
3691 class_unregister(&sd_disk_class
);
3693 for (i
= 0; i
< SD_MAJORS
; i
++) {
3694 blk_unregister_region(sd_major(i
), SD_MINORS
);
3695 unregister_blkdev(sd_major(i
), "sd");
3699 module_init(init_sd
);
3700 module_exit(exit_sd
);
3702 static void sd_print_sense_hdr(struct scsi_disk
*sdkp
,
3703 struct scsi_sense_hdr
*sshdr
)
3705 scsi_print_sense_hdr(sdkp
->device
,
3706 sdkp
->disk
? sdkp
->disk
->disk_name
: NULL
, sshdr
);
3709 static void sd_print_result(const struct scsi_disk
*sdkp
, const char *msg
,
3712 const char *hb_string
= scsi_hostbyte_string(result
);
3713 const char *db_string
= scsi_driverbyte_string(result
);
3715 if (hb_string
|| db_string
)
3716 sd_printk(KERN_INFO
, sdkp
,
3717 "%s: Result: hostbyte=%s driverbyte=%s\n", msg
,
3718 hb_string
? hb_string
: "invalid",
3719 db_string
? db_string
: "invalid");
3721 sd_printk(KERN_INFO
, sdkp
,
3722 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3723 msg
, host_byte(result
), driver_byte(result
));