1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _SCSI_SCSI_DEVICE_H
3 #define _SCSI_SCSI_DEVICE_H
5 #include <linux/list.h>
6 #include <linux/spinlock.h>
7 #include <linux/workqueue.h>
8 #include <linux/blkdev.h>
10 #include <linux/atomic.h>
11 #include <linux/sbitmap.h>
18 struct scsi_sense_hdr
;
20 typedef __u64 __bitwise blist_flags_t
;
22 #define SCSI_SENSE_BUFFERSIZE 96
24 struct scsi_mode_data
{
26 __u16 block_descriptor_length
;
34 * sdev state: If you alter this, you also need to alter scsi_sysfs.c
35 * (for the ascii descriptions) and the state model enforcer:
36 * scsi_lib:scsi_device_set_state().
38 enum scsi_device_state
{
39 SDEV_CREATED
= 1, /* device created but not added to sysfs
40 * Only internal commands allowed (for inq) */
41 SDEV_RUNNING
, /* device properly configured
42 * All commands allowed */
43 SDEV_CANCEL
, /* beginning to delete device
44 * Only error handler commands allowed */
45 SDEV_DEL
, /* device deleted
46 * no commands allowed */
47 SDEV_QUIESCE
, /* Device quiescent. No block commands
48 * will be accepted, only specials (which
49 * originate in the mid-layer) */
50 SDEV_OFFLINE
, /* Device offlined (by error handling or
52 SDEV_TRANSPORT_OFFLINE
, /* Offlined by transport class error handler */
53 SDEV_BLOCK
, /* Device blocked by scsi lld. No
54 * scsi commands from user or midlayer
55 * should be issued to the scsi
57 SDEV_CREATED_BLOCK
, /* same as above but for created devices */
61 SCSI_SCAN_INITIAL
= 0,
66 enum scsi_device_event
{
67 SDEV_EVT_MEDIA_CHANGE
= 1, /* media has changed */
68 SDEV_EVT_INQUIRY_CHANGE_REPORTED
, /* 3F 03 UA reported */
69 SDEV_EVT_CAPACITY_CHANGE_REPORTED
, /* 2A 09 UA reported */
70 SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED
, /* 38 07 UA reported */
71 SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED
, /* 2A 01 UA reported */
72 SDEV_EVT_LUN_CHANGE_REPORTED
, /* 3F 0E UA reported */
73 SDEV_EVT_ALUA_STATE_CHANGE_REPORTED
, /* 2A 06 UA reported */
74 SDEV_EVT_POWER_ON_RESET_OCCURRED
, /* 29 00 UA reported */
76 SDEV_EVT_FIRST
= SDEV_EVT_MEDIA_CHANGE
,
77 SDEV_EVT_LAST
= SDEV_EVT_POWER_ON_RESET_OCCURRED
,
79 SDEV_EVT_MAXBITS
= SDEV_EVT_LAST
+ 1
83 enum scsi_device_event evt_type
;
84 struct list_head node
;
86 /* put union of data structures, for non-simple event types,
92 * struct scsi_vpd - SCSI Vital Product Data
93 * @rcu: For kfree_rcu().
94 * @len: Length in bytes of @data.
95 * @data: VPD data as defined in various T10 SCSI standard documents.
100 unsigned char data
[];
104 struct Scsi_Host
*host
;
105 struct request_queue
*request_queue
;
107 /* the next two are protected by the host->host_lock */
108 struct list_head siblings
; /* list of all devices on this host */
109 struct list_head same_target_siblings
; /* just the devices sharing same target id */
111 struct sbitmap budget_map
;
112 atomic_t device_blocked
; /* Device returned QUEUE_FULL. */
115 spinlock_t list_lock
;
116 struct list_head starved_entry
;
117 unsigned short queue_depth
; /* How deep of a queue we want */
118 unsigned short max_queue_depth
; /* max queue depth */
119 unsigned short last_queue_full_depth
; /* These two are used by */
120 unsigned short last_queue_full_count
; /* scsi_track_queue_full() */
121 unsigned long last_queue_full_time
; /* last queue full time */
122 unsigned long queue_ramp_up_period
; /* ramp up period in jiffies */
123 #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ)
125 unsigned long last_queue_ramp_up
; /* last queue ramp up time */
127 unsigned int id
, channel
;
129 unsigned int manufacturer
; /* Manufacturer of device, for using
130 * vendor-specific cmd's */
131 unsigned sector_size
; /* size in bytes */
133 void *hostdata
; /* available to low-level driver */
136 char inq_periph_qual
; /* PQ from INQUIRY data */
137 struct mutex inquiry_mutex
;
138 unsigned char inquiry_len
; /* valid bytes in 'inquiry' */
139 unsigned char * inquiry
; /* INQUIRY response data */
140 const char * vendor
; /* [back_compat] point into 'inquiry' ... */
141 const char * model
; /* ... after scan; point to static string */
142 const char * rev
; /* ... "nullnullnullnull" before scan */
144 #define SCSI_VPD_PG_LEN 255
145 struct scsi_vpd __rcu
*vpd_pg0
;
146 struct scsi_vpd __rcu
*vpd_pg83
;
147 struct scsi_vpd __rcu
*vpd_pg80
;
148 struct scsi_vpd __rcu
*vpd_pg89
;
149 struct scsi_target
*sdev_target
;
151 blist_flags_t sdev_bflags
; /* black/white flags as also found in
152 * scsi_devinfo.[hc]. For now used only to
153 * pass settings from slave_alloc to scsi
155 unsigned int eh_timeout
; /* Error handling timeout */
156 unsigned removable
:1;
157 unsigned changed
:1; /* Data invalid due to media change */
158 unsigned busy
:1; /* Used to prevent races */
159 unsigned lockable
:1; /* Able to prevent media removal */
160 unsigned locked
:1; /* Media removal disabled */
161 unsigned borken
:1; /* Tell the Seagate driver to be
162 * painfully slow on this device */
163 unsigned disconnect
:1; /* can disconnect */
164 unsigned soft_reset
:1; /* Uses soft reset option */
165 unsigned sdtr
:1; /* Device supports SDTR messages */
166 unsigned wdtr
:1; /* Device supports WDTR messages */
167 unsigned ppr
:1; /* Device supports PPR messages */
168 unsigned tagged_supported
:1; /* Supports SCSI-II tagged queuing */
169 unsigned simple_tags
:1; /* simple queue tag messages are enabled */
170 unsigned was_reset
:1; /* There was a bus reset on the bus for
172 unsigned expecting_cc_ua
:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
173 * because we did a bus reset. */
174 unsigned use_10_for_rw
:1; /* first try 10-byte read / write */
175 unsigned use_10_for_ms
:1; /* first try 10-byte mode sense/select */
176 unsigned set_dbd_for_ms
:1; /* Set "DBD" field in mode sense */
177 unsigned no_report_opcodes
:1; /* no REPORT SUPPORTED OPERATION CODES */
178 unsigned no_write_same
:1; /* no WRITE SAME command */
179 unsigned use_16_for_rw
:1; /* Use read/write(16) over read/write(10) */
180 unsigned skip_ms_page_8
:1; /* do not use MODE SENSE page 0x08 */
181 unsigned skip_ms_page_3f
:1; /* do not use MODE SENSE page 0x3f */
182 unsigned skip_vpd_pages
:1; /* do not read VPD pages */
183 unsigned try_vpd_pages
:1; /* attempt to read VPD pages */
184 unsigned use_192_bytes_for_3f
:1; /* ask for 192 bytes from page 0x3f */
185 unsigned no_start_on_add
:1; /* do not issue start on add */
186 unsigned allow_restart
:1; /* issue START_UNIT in error handler */
187 unsigned manage_start_stop
:1; /* Let HLD (sd) manage start/stop */
188 unsigned start_stop_pwr_cond
:1; /* Set power cond. in START_STOP_UNIT */
189 unsigned no_uld_attach
:1; /* disable connecting to upper level drivers */
190 unsigned select_no_atn
:1;
191 unsigned fix_capacity
:1; /* READ_CAPACITY is too high by 1 */
192 unsigned guess_capacity
:1; /* READ_CAPACITY might be too high by 1 */
193 unsigned retry_hwerror
:1; /* Retry HARDWARE_ERROR */
194 unsigned last_sector_bug
:1; /* do not use multisector accesses on
195 SD_LAST_BUGGY_SECTORS */
196 unsigned no_read_disc_info
:1; /* Avoid READ_DISC_INFO cmds */
197 unsigned no_read_capacity_16
:1; /* Avoid READ_CAPACITY_16 cmds */
198 unsigned try_rc_10_first
:1; /* Try READ_CAPACACITY_10 first */
199 unsigned security_supported
:1; /* Supports Security Protocols */
200 unsigned is_visible
:1; /* is the device visible in sysfs */
201 unsigned wce_default_on
:1; /* Cache is ON by default */
202 unsigned no_dif
:1; /* T10 PI (DIF) should be disabled */
203 unsigned broken_fua
:1; /* Don't set FUA bit */
204 unsigned lun_in_cdb
:1; /* Store LUN bits in CDB[1] */
205 unsigned unmap_limit_for_ws
:1; /* Use the UNMAP limit for WRITE SAME */
206 unsigned rpm_autosuspend
:1; /* Enable runtime autosuspend at device
208 unsigned ignore_media_change
:1; /* Ignore MEDIA CHANGE on resume */
209 unsigned silence_suspend
:1; /* Do not print runtime PM related messages */
211 bool offline_already
; /* Device offline message logged */
213 atomic_t disk_events_disable_depth
; /* disable depth for disk events */
215 DECLARE_BITMAP(supported_events
, SDEV_EVT_MAXBITS
); /* supported events */
216 DECLARE_BITMAP(pending_events
, SDEV_EVT_MAXBITS
); /* pending events */
217 struct list_head event_list
; /* asserted events */
218 struct work_struct event_work
;
220 unsigned int max_device_blocked
; /* what device_blocked counts down from */
221 #define SCSI_DEFAULT_DEVICE_BLOCKED 3
223 atomic_t iorequest_cnt
;
227 struct device sdev_gendev
,
230 struct execute_work ew
; /* used to get process context on put */
231 struct work_struct requeue_work
;
233 struct scsi_device_handler
*handler
;
236 size_t dma_drain_len
;
239 unsigned int sg_timeout
;
240 unsigned int sg_reserved_size
;
242 struct bsg_device
*bsg_dev
;
243 unsigned char access_state
;
244 struct mutex state_mutex
;
245 enum scsi_device_state sdev_state
;
246 struct task_struct
*quiesced_by
;
247 unsigned long sdev_data
[];
248 } __attribute__((aligned(sizeof(unsigned long))));
250 #define to_scsi_device(d) \
251 container_of(d, struct scsi_device, sdev_gendev)
252 #define class_to_sdev(d) \
253 container_of(d, struct scsi_device, sdev_dev)
254 #define transport_class_to_sdev(class_dev) \
255 to_scsi_device(class_dev->parent)
257 #define sdev_dbg(sdev, fmt, a...) \
258 dev_dbg(&(sdev)->sdev_gendev, fmt, ##a)
261 * like scmd_printk, but the device name is passed in
262 * as a string pointer
265 sdev_prefix_printk(const char *, const struct scsi_device
*, const char *,
268 #define sdev_printk(l, sdev, fmt, a...) \
269 sdev_prefix_printk(l, sdev, NULL, fmt, ##a)
272 scmd_printk(const char *, const struct scsi_cmnd
*, const char *, ...);
274 #define scmd_dbg(scmd, fmt, a...) \
276 struct request *__rq = scsi_cmd_to_rq((scmd)); \
279 sdev_dbg((scmd)->device, "[%s] " fmt, \
280 __rq->rq_disk->disk_name, ##a); \
282 sdev_dbg((scmd)->device, fmt, ##a); \
285 enum scsi_target_state
{
289 STARGET_CREATED_REMOVE
,
294 * scsi_target: representation of a scsi target, for now, this is only
295 * used for single_lun devices. If no one has active IO to the target,
296 * starget_sdev_user is NULL, else it points to the active sdev.
299 struct scsi_device
*starget_sdev_user
;
300 struct list_head siblings
;
301 struct list_head devices
;
303 struct kref reap_ref
; /* last put renders target invisible */
304 unsigned int channel
;
305 unsigned int id
; /* target id ... replace
306 * scsi_device.id eventually */
307 unsigned int create
:1; /* signal that it needs to be added */
308 unsigned int single_lun
:1; /* Indicates we should only
309 * allow I/O to one of the luns
310 * for the device at a time. */
311 unsigned int pdt_1f_for_no_lun
:1; /* PDT = 0x1f
312 * means no lun present. */
313 unsigned int no_report_luns
:1; /* Don't use
314 * REPORT LUNS for scanning. */
315 unsigned int expecting_lun_change
:1; /* A device has reported
316 * a 3F/0E UA, other devices on
317 * the same target will also. */
318 /* commands actually active on LLD. */
319 atomic_t target_busy
;
320 atomic_t target_blocked
;
323 * LLDs should set this in the slave_alloc host template callout.
324 * If set to zero then there is not limit.
326 unsigned int can_queue
;
327 unsigned int max_target_blocked
;
328 #define SCSI_DEFAULT_TARGET_BLOCKED 3
331 enum scsi_target_state state
;
332 void *hostdata
; /* available to low-level driver */
333 unsigned long starget_data
[]; /* for the transport */
334 /* starget_data must be the last element!!!! */
335 } __attribute__((aligned(sizeof(unsigned long))));
337 #define to_scsi_target(d) container_of(d, struct scsi_target, dev)
338 static inline struct scsi_target
*scsi_target(struct scsi_device
*sdev
)
340 return to_scsi_target(sdev
->sdev_gendev
.parent
);
342 #define transport_class_to_starget(class_dev) \
343 to_scsi_target(class_dev->parent)
345 #define starget_printk(prefix, starget, fmt, a...) \
346 dev_printk(prefix, &(starget)->dev, fmt, ##a)
348 extern struct scsi_device
*__scsi_add_device(struct Scsi_Host
*,
349 uint
, uint
, u64
, void *hostdata
);
350 extern int scsi_add_device(struct Scsi_Host
*host
, uint channel
,
351 uint target
, u64 lun
);
352 extern int scsi_register_device_handler(struct scsi_device_handler
*scsi_dh
);
353 extern void scsi_remove_device(struct scsi_device
*);
354 extern int scsi_unregister_device_handler(struct scsi_device_handler
*scsi_dh
);
355 void scsi_attach_vpd(struct scsi_device
*sdev
);
357 extern struct scsi_device
*scsi_device_from_queue(struct request_queue
*q
);
358 extern int __must_check
scsi_device_get(struct scsi_device
*);
359 extern void scsi_device_put(struct scsi_device
*);
360 extern struct scsi_device
*scsi_device_lookup(struct Scsi_Host
*,
362 extern struct scsi_device
*__scsi_device_lookup(struct Scsi_Host
*,
364 extern struct scsi_device
*scsi_device_lookup_by_target(struct scsi_target
*,
366 extern struct scsi_device
*__scsi_device_lookup_by_target(struct scsi_target
*,
368 extern void starget_for_each_device(struct scsi_target
*, void *,
369 void (*fn
)(struct scsi_device
*, void *));
370 extern void __starget_for_each_device(struct scsi_target
*, void *,
371 void (*fn
)(struct scsi_device
*,
374 /* only exposed to implement shost_for_each_device */
375 extern struct scsi_device
*__scsi_iterate_devices(struct Scsi_Host
*,
376 struct scsi_device
*);
379 * shost_for_each_device - iterate over all devices of a host
380 * @sdev: the &struct scsi_device to use as a cursor
381 * @shost: the &struct scsi_host to iterate over
383 * Iterator that returns each device attached to @shost. This loop
384 * takes a reference on each device and releases it at the end. If
385 * you break out of the loop, you must call scsi_device_put(sdev).
387 #define shost_for_each_device(sdev, shost) \
388 for ((sdev) = __scsi_iterate_devices((shost), NULL); \
390 (sdev) = __scsi_iterate_devices((shost), (sdev)))
393 * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
394 * @sdev: the &struct scsi_device to use as a cursor
395 * @shost: the &struct scsi_host to iterate over
397 * Iterator that returns each device attached to @shost. It does _not_
398 * take a reference on the scsi_device, so the whole loop must be
399 * protected by shost->host_lock.
401 * Note: The only reason to use this is because you need to access the
402 * device list in interrupt context. Otherwise you really want to use
403 * shost_for_each_device instead.
405 #define __shost_for_each_device(sdev, shost) \
406 list_for_each_entry((sdev), &((shost)->__devices), siblings)
408 extern int scsi_change_queue_depth(struct scsi_device
*, int);
409 extern int scsi_track_queue_full(struct scsi_device
*, int);
411 extern int scsi_set_medium_removal(struct scsi_device
*, char);
413 extern int scsi_mode_sense(struct scsi_device
*sdev
, int dbd
, int modepage
,
414 unsigned char *buffer
, int len
, int timeout
,
415 int retries
, struct scsi_mode_data
*data
,
416 struct scsi_sense_hdr
*);
417 extern int scsi_mode_select(struct scsi_device
*sdev
, int pf
, int sp
,
418 int modepage
, unsigned char *buffer
, int len
,
419 int timeout
, int retries
,
420 struct scsi_mode_data
*data
,
421 struct scsi_sense_hdr
*);
422 extern int scsi_test_unit_ready(struct scsi_device
*sdev
, int timeout
,
423 int retries
, struct scsi_sense_hdr
*sshdr
);
424 extern int scsi_get_vpd_page(struct scsi_device
*, u8 page
, unsigned char *buf
,
426 extern int scsi_report_opcode(struct scsi_device
*sdev
, unsigned char *buffer
,
427 unsigned int len
, unsigned char opcode
);
428 extern int scsi_device_set_state(struct scsi_device
*sdev
,
429 enum scsi_device_state state
);
430 extern struct scsi_event
*sdev_evt_alloc(enum scsi_device_event evt_type
,
432 extern void sdev_evt_send(struct scsi_device
*sdev
, struct scsi_event
*evt
);
433 extern void sdev_evt_send_simple(struct scsi_device
*sdev
,
434 enum scsi_device_event evt_type
, gfp_t gfpflags
);
435 extern int scsi_device_quiesce(struct scsi_device
*sdev
);
436 extern void scsi_device_resume(struct scsi_device
*sdev
);
437 extern void scsi_target_quiesce(struct scsi_target
*);
438 extern void scsi_target_resume(struct scsi_target
*);
439 extern void scsi_scan_target(struct device
*parent
, unsigned int channel
,
440 unsigned int id
, u64 lun
,
441 enum scsi_scan_mode rescan
);
442 extern void scsi_target_reap(struct scsi_target
*);
443 extern void scsi_target_block(struct device
*);
444 extern void scsi_target_unblock(struct device
*, enum scsi_device_state
);
445 extern void scsi_remove_target(struct device
*);
446 extern const char *scsi_device_state_name(enum scsi_device_state
);
447 extern int scsi_is_sdev_device(const struct device
*);
448 extern int scsi_is_target_device(const struct device
*);
449 extern void scsi_sanitize_inquiry_string(unsigned char *s
, int len
);
450 extern int __scsi_execute(struct scsi_device
*sdev
, const unsigned char *cmd
,
451 int data_direction
, void *buffer
, unsigned bufflen
,
452 unsigned char *sense
, struct scsi_sense_hdr
*sshdr
,
453 int timeout
, int retries
, u64 flags
,
454 req_flags_t rq_flags
, int *resid
);
455 /* Make sure any sense buffer is the correct size. */
456 #define scsi_execute(sdev, cmd, data_direction, buffer, bufflen, sense, \
457 sshdr, timeout, retries, flags, rq_flags, resid) \
459 BUILD_BUG_ON((sense) != NULL && \
460 sizeof(sense) != SCSI_SENSE_BUFFERSIZE); \
461 __scsi_execute(sdev, cmd, data_direction, buffer, bufflen, \
462 sense, sshdr, timeout, retries, flags, rq_flags, \
465 static inline int scsi_execute_req(struct scsi_device
*sdev
,
466 const unsigned char *cmd
, int data_direction
, void *buffer
,
467 unsigned bufflen
, struct scsi_sense_hdr
*sshdr
, int timeout
,
468 int retries
, int *resid
)
470 return scsi_execute(sdev
, cmd
, data_direction
, buffer
,
471 bufflen
, NULL
, sshdr
, timeout
, retries
, 0, 0, resid
);
473 extern void sdev_disable_disk_events(struct scsi_device
*sdev
);
474 extern void sdev_enable_disk_events(struct scsi_device
*sdev
);
475 extern int scsi_vpd_lun_id(struct scsi_device
*, char *, size_t);
476 extern int scsi_vpd_tpg_id(struct scsi_device
*, int *);
479 extern int scsi_autopm_get_device(struct scsi_device
*);
480 extern void scsi_autopm_put_device(struct scsi_device
*);
482 static inline int scsi_autopm_get_device(struct scsi_device
*d
) { return 0; }
483 static inline void scsi_autopm_put_device(struct scsi_device
*d
) {}
484 #endif /* CONFIG_PM */
486 static inline int __must_check
scsi_device_reprobe(struct scsi_device
*sdev
)
488 return device_reprobe(&sdev
->sdev_gendev
);
491 static inline unsigned int sdev_channel(struct scsi_device
*sdev
)
493 return sdev
->channel
;
496 static inline unsigned int sdev_id(struct scsi_device
*sdev
)
501 #define scmd_id(scmd) sdev_id((scmd)->device)
502 #define scmd_channel(scmd) sdev_channel((scmd)->device)
505 * checks for positions of the SCSI state machine
507 static inline int scsi_device_online(struct scsi_device
*sdev
)
509 return (sdev
->sdev_state
!= SDEV_OFFLINE
&&
510 sdev
->sdev_state
!= SDEV_TRANSPORT_OFFLINE
&&
511 sdev
->sdev_state
!= SDEV_DEL
);
513 static inline int scsi_device_blocked(struct scsi_device
*sdev
)
515 return sdev
->sdev_state
== SDEV_BLOCK
||
516 sdev
->sdev_state
== SDEV_CREATED_BLOCK
;
518 static inline int scsi_device_created(struct scsi_device
*sdev
)
520 return sdev
->sdev_state
== SDEV_CREATED
||
521 sdev
->sdev_state
== SDEV_CREATED_BLOCK
;
524 int scsi_internal_device_block_nowait(struct scsi_device
*sdev
);
525 int scsi_internal_device_unblock_nowait(struct scsi_device
*sdev
,
526 enum scsi_device_state new_state
);
528 /* accessor functions for the SCSI parameters */
529 static inline int scsi_device_sync(struct scsi_device
*sdev
)
533 static inline int scsi_device_wide(struct scsi_device
*sdev
)
537 static inline int scsi_device_dt(struct scsi_device
*sdev
)
541 static inline int scsi_device_dt_only(struct scsi_device
*sdev
)
543 if (sdev
->inquiry_len
< 57)
545 return (sdev
->inquiry
[56] & 0x0c) == 0x04;
547 static inline int scsi_device_ius(struct scsi_device
*sdev
)
549 if (sdev
->inquiry_len
< 57)
551 return sdev
->inquiry
[56] & 0x01;
553 static inline int scsi_device_qas(struct scsi_device
*sdev
)
555 if (sdev
->inquiry_len
< 57)
557 return sdev
->inquiry
[56] & 0x02;
559 static inline int scsi_device_enclosure(struct scsi_device
*sdev
)
561 return sdev
->inquiry
? (sdev
->inquiry
[6] & (1<<6)) : 1;
564 static inline int scsi_device_protection(struct scsi_device
*sdev
)
569 return sdev
->scsi_level
> SCSI_2
&& sdev
->inquiry
[5] & (1<<0);
572 static inline int scsi_device_tpgs(struct scsi_device
*sdev
)
574 return sdev
->inquiry
? (sdev
->inquiry
[5] >> 4) & 0x3 : 0;
578 * scsi_device_supports_vpd - test if a device supports VPD pages
579 * @sdev: the &struct scsi_device to test
581 * If the 'try_vpd_pages' flag is set it takes precedence.
582 * Otherwise we will assume VPD pages are supported if the
583 * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set.
585 static inline int scsi_device_supports_vpd(struct scsi_device
*sdev
)
587 /* Attempt VPD inquiry if the device blacklist explicitly calls
590 if (sdev
->try_vpd_pages
)
593 * Although VPD inquiries can go to SCSI-2 type devices,
594 * some USB ones crash on receiving them, and the pages
595 * we currently ask for are mandatory for SPC-2 and beyond
597 if (sdev
->scsi_level
>= SCSI_SPC_2
&& !sdev
->skip_vpd_pages
)
602 static inline int scsi_device_busy(struct scsi_device
*sdev
)
604 return sbitmap_weight(&sdev
->budget_map
);
607 #define MODULE_ALIAS_SCSI_DEVICE(type) \
608 MODULE_ALIAS("scsi:t-" __stringify(type) "*")
609 #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
611 #endif /* _SCSI_SCSI_DEVICE_H */