Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0 */
2 : #ifndef _SCSI_SCSI_DEVICE_H
3 : #define _SCSI_SCSI_DEVICE_H
4 :
5 : #include <linux/list.h>
6 : #include <linux/spinlock.h>
7 : #include <linux/workqueue.h>
8 : #include <linux/blkdev.h>
9 : #include <scsi/scsi.h>
10 : #include <linux/atomic.h>
11 :
12 : struct device;
13 : struct request_queue;
14 : struct scsi_cmnd;
15 : struct scsi_lun;
16 : struct scsi_sense_hdr;
17 :
18 : typedef __u64 __bitwise blist_flags_t;
19 :
20 : #define SCSI_SENSE_BUFFERSIZE 96
21 :
22 : struct scsi_mode_data {
23 : __u32 length;
24 : __u16 block_descriptor_length;
25 : __u8 medium_type;
26 : __u8 device_specific;
27 : __u8 header_length;
28 : __u8 longlba:1;
29 : };
30 :
31 : /*
32 : * sdev state: If you alter this, you also need to alter scsi_sysfs.c
33 : * (for the ascii descriptions) and the state model enforcer:
34 : * scsi_lib:scsi_device_set_state().
35 : */
36 : enum scsi_device_state {
37 : SDEV_CREATED = 1, /* device created but not added to sysfs
38 : * Only internal commands allowed (for inq) */
39 : SDEV_RUNNING, /* device properly configured
40 : * All commands allowed */
41 : SDEV_CANCEL, /* beginning to delete device
42 : * Only error handler commands allowed */
43 : SDEV_DEL, /* device deleted
44 : * no commands allowed */
45 : SDEV_QUIESCE, /* Device quiescent. No block commands
46 : * will be accepted, only specials (which
47 : * originate in the mid-layer) */
48 : SDEV_OFFLINE, /* Device offlined (by error handling or
49 : * user request */
50 : SDEV_TRANSPORT_OFFLINE, /* Offlined by transport class error handler */
51 : SDEV_BLOCK, /* Device blocked by scsi lld. No
52 : * scsi commands from user or midlayer
53 : * should be issued to the scsi
54 : * lld. */
55 : SDEV_CREATED_BLOCK, /* same as above but for created devices */
56 : };
57 :
58 : enum scsi_scan_mode {
59 : SCSI_SCAN_INITIAL = 0,
60 : SCSI_SCAN_RESCAN,
61 : SCSI_SCAN_MANUAL,
62 : };
63 :
64 : enum scsi_device_event {
65 : SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */
66 : SDEV_EVT_INQUIRY_CHANGE_REPORTED, /* 3F 03 UA reported */
67 : SDEV_EVT_CAPACITY_CHANGE_REPORTED, /* 2A 09 UA reported */
68 : SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED, /* 38 07 UA reported */
69 : SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */
70 : SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */
71 : SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, /* 2A 06 UA reported */
72 : SDEV_EVT_POWER_ON_RESET_OCCURRED, /* 29 00 UA reported */
73 :
74 : SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE,
75 : SDEV_EVT_LAST = SDEV_EVT_POWER_ON_RESET_OCCURRED,
76 :
77 : SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1
78 : };
79 :
80 : struct scsi_event {
81 : enum scsi_device_event evt_type;
82 : struct list_head node;
83 :
84 : /* put union of data structures, for non-simple event types,
85 : * here
86 : */
87 : };
88 :
89 : /**
90 : * struct scsi_vpd - SCSI Vital Product Data
91 : * @rcu: For kfree_rcu().
92 : * @len: Length in bytes of @data.
93 : * @data: VPD data as defined in various T10 SCSI standard documents.
94 : */
95 : struct scsi_vpd {
96 : struct rcu_head rcu;
97 : int len;
98 : unsigned char data[];
99 : };
100 :
101 : struct scsi_device {
102 : struct Scsi_Host *host;
103 : struct request_queue *request_queue;
104 :
105 : /* the next two are protected by the host->host_lock */
106 : struct list_head siblings; /* list of all devices on this host */
107 : struct list_head same_target_siblings; /* just the devices sharing same target id */
108 :
109 : atomic_t device_busy; /* commands actually active on LLDD */
110 : atomic_t device_blocked; /* Device returned QUEUE_FULL. */
111 :
112 : atomic_t restarts;
113 : spinlock_t list_lock;
114 : struct list_head starved_entry;
115 : unsigned short queue_depth; /* How deep of a queue we want */
116 : unsigned short max_queue_depth; /* max queue depth */
117 : unsigned short last_queue_full_depth; /* These two are used by */
118 : unsigned short last_queue_full_count; /* scsi_track_queue_full() */
119 : unsigned long last_queue_full_time; /* last queue full time */
120 : unsigned long queue_ramp_up_period; /* ramp up period in jiffies */
121 : #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ)
122 :
123 : unsigned long last_queue_ramp_up; /* last queue ramp up time */
124 :
125 : unsigned int id, channel;
126 : u64 lun;
127 : unsigned int manufacturer; /* Manufacturer of device, for using
128 : * vendor-specific cmd's */
129 : unsigned sector_size; /* size in bytes */
130 :
131 : void *hostdata; /* available to low-level driver */
132 : unsigned char type;
133 : char scsi_level;
134 : char inq_periph_qual; /* PQ from INQUIRY data */
135 : struct mutex inquiry_mutex;
136 : unsigned char inquiry_len; /* valid bytes in 'inquiry' */
137 : unsigned char * inquiry; /* INQUIRY response data */
138 : const char * vendor; /* [back_compat] point into 'inquiry' ... */
139 : const char * model; /* ... after scan; point to static string */
140 : const char * rev; /* ... "nullnullnullnull" before scan */
141 :
142 : #define SCSI_VPD_PG_LEN 255
143 : struct scsi_vpd __rcu *vpd_pg0;
144 : struct scsi_vpd __rcu *vpd_pg83;
145 : struct scsi_vpd __rcu *vpd_pg80;
146 : struct scsi_vpd __rcu *vpd_pg89;
147 : unsigned char current_tag; /* current tag */
148 : struct scsi_target *sdev_target; /* used only for single_lun */
149 :
150 : blist_flags_t sdev_bflags; /* black/white flags as also found in
151 : * scsi_devinfo.[hc]. For now used only to
152 : * pass settings from slave_alloc to scsi
153 : * core. */
154 : unsigned int eh_timeout; /* Error handling timeout */
155 : unsigned removable:1;
156 : unsigned changed:1; /* Data invalid due to media change */
157 : unsigned busy:1; /* Used to prevent races */
158 : unsigned lockable:1; /* Able to prevent media removal */
159 : unsigned locked:1; /* Media removal disabled */
160 : unsigned borken:1; /* Tell the Seagate driver to be
161 : * painfully slow on this device */
162 : unsigned disconnect:1; /* can disconnect */
163 : unsigned soft_reset:1; /* Uses soft reset option */
164 : unsigned sdtr:1; /* Device supports SDTR messages */
165 : unsigned wdtr:1; /* Device supports WDTR messages */
166 : unsigned ppr:1; /* Device supports PPR messages */
167 : unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */
168 : unsigned simple_tags:1; /* simple queue tag messages are enabled */
169 : unsigned was_reset:1; /* There was a bus reset on the bus for
170 : * this device */
171 : unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
172 : * because we did a bus reset. */
173 : unsigned use_10_for_rw:1; /* first try 10-byte read / write */
174 : unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
175 : unsigned set_dbd_for_ms:1; /* Set "DBD" field in mode sense */
176 : unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */
177 : unsigned no_write_same:1; /* no WRITE SAME command */
178 : unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */
179 : unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */
180 : unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */
181 : unsigned skip_vpd_pages:1; /* do not read VPD pages */
182 : unsigned try_vpd_pages:1; /* attempt to read VPD pages */
183 : unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
184 : unsigned no_start_on_add:1; /* do not issue start on add */
185 : unsigned allow_restart:1; /* issue START_UNIT in error handler */
186 : unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */
187 : unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */
188 : unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
189 : unsigned select_no_atn:1;
190 : unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */
191 : unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */
192 : unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */
193 : unsigned last_sector_bug:1; /* do not use multisector accesses on
194 : SD_LAST_BUGGY_SECTORS */
195 : unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */
196 : unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */
197 : unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */
198 : unsigned security_supported:1; /* Supports Security Protocols */
199 : unsigned is_visible:1; /* is the device visible in sysfs */
200 : unsigned wce_default_on:1; /* Cache is ON by default */
201 : unsigned no_dif:1; /* T10 PI (DIF) should be disabled */
202 : unsigned broken_fua:1; /* Don't set FUA bit */
203 : unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */
204 : unsigned unmap_limit_for_ws:1; /* Use the UNMAP limit for WRITE SAME */
205 : unsigned rpm_autosuspend:1; /* Enable runtime autosuspend at device
206 : * creation time */
207 :
208 : bool offline_already; /* Device offline message logged */
209 :
210 : atomic_t disk_events_disable_depth; /* disable depth for disk events */
211 :
212 : DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
213 : DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */
214 : struct list_head event_list; /* asserted events */
215 : struct work_struct event_work;
216 :
217 : unsigned int max_device_blocked; /* what device_blocked counts down from */
218 : #define SCSI_DEFAULT_DEVICE_BLOCKED 3
219 :
220 : atomic_t iorequest_cnt;
221 : atomic_t iodone_cnt;
222 : atomic_t ioerr_cnt;
223 :
224 : struct device sdev_gendev,
225 : sdev_dev;
226 :
227 : struct execute_work ew; /* used to get process context on put */
228 : struct work_struct requeue_work;
229 :
230 : struct scsi_device_handler *handler;
231 : void *handler_data;
232 :
233 : size_t dma_drain_len;
234 : void *dma_drain_buf;
235 :
236 : unsigned char access_state;
237 : struct mutex state_mutex;
238 : enum scsi_device_state sdev_state;
239 : struct task_struct *quiesced_by;
240 : unsigned long sdev_data[];
241 : } __attribute__((aligned(sizeof(unsigned long))));
242 :
243 : #define to_scsi_device(d) \
244 : container_of(d, struct scsi_device, sdev_gendev)
245 : #define class_to_sdev(d) \
246 : container_of(d, struct scsi_device, sdev_dev)
247 : #define transport_class_to_sdev(class_dev) \
248 : to_scsi_device(class_dev->parent)
249 :
250 : #define sdev_dbg(sdev, fmt, a...) \
251 : dev_dbg(&(sdev)->sdev_gendev, fmt, ##a)
252 :
253 : /*
254 : * like scmd_printk, but the device name is passed in
255 : * as a string pointer
256 : */
257 : __printf(4, 5) void
258 : sdev_prefix_printk(const char *, const struct scsi_device *, const char *,
259 : const char *, ...);
260 :
261 : #define sdev_printk(l, sdev, fmt, a...) \
262 : sdev_prefix_printk(l, sdev, NULL, fmt, ##a)
263 :
264 : __printf(3, 4) void
265 : scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...);
266 :
267 : #define scmd_dbg(scmd, fmt, a...) \
268 : do { \
269 : if ((scmd)->request->rq_disk) \
270 : sdev_dbg((scmd)->device, "[%s] " fmt, \
271 : (scmd)->request->rq_disk->disk_name, ##a);\
272 : else \
273 : sdev_dbg((scmd)->device, fmt, ##a); \
274 : } while (0)
275 :
276 : enum scsi_target_state {
277 : STARGET_CREATED = 1,
278 : STARGET_RUNNING,
279 : STARGET_REMOVE,
280 : STARGET_CREATED_REMOVE,
281 : STARGET_DEL,
282 : };
283 :
284 : /*
285 : * scsi_target: representation of a scsi target, for now, this is only
286 : * used for single_lun devices. If no one has active IO to the target,
287 : * starget_sdev_user is NULL, else it points to the active sdev.
288 : */
289 : struct scsi_target {
290 : struct scsi_device *starget_sdev_user;
291 : struct list_head siblings;
292 : struct list_head devices;
293 : struct device dev;
294 : struct kref reap_ref; /* last put renders target invisible */
295 : unsigned int channel;
296 : unsigned int id; /* target id ... replace
297 : * scsi_device.id eventually */
298 : unsigned int create:1; /* signal that it needs to be added */
299 : unsigned int single_lun:1; /* Indicates we should only
300 : * allow I/O to one of the luns
301 : * for the device at a time. */
302 : unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f
303 : * means no lun present. */
304 : unsigned int no_report_luns:1; /* Don't use
305 : * REPORT LUNS for scanning. */
306 : unsigned int expecting_lun_change:1; /* A device has reported
307 : * a 3F/0E UA, other devices on
308 : * the same target will also. */
309 : /* commands actually active on LLD. */
310 : atomic_t target_busy;
311 : atomic_t target_blocked;
312 :
313 : /*
314 : * LLDs should set this in the slave_alloc host template callout.
315 : * If set to zero then there is not limit.
316 : */
317 : unsigned int can_queue;
318 : unsigned int max_target_blocked;
319 : #define SCSI_DEFAULT_TARGET_BLOCKED 3
320 :
321 : char scsi_level;
322 : enum scsi_target_state state;
323 : void *hostdata; /* available to low-level driver */
324 : unsigned long starget_data[]; /* for the transport */
325 : /* starget_data must be the last element!!!! */
326 : } __attribute__((aligned(sizeof(unsigned long))));
327 :
328 : #define to_scsi_target(d) container_of(d, struct scsi_target, dev)
329 0 : static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
330 : {
331 0 : return to_scsi_target(sdev->sdev_gendev.parent);
332 : }
333 : #define transport_class_to_starget(class_dev) \
334 : to_scsi_target(class_dev->parent)
335 :
336 : #define starget_printk(prefix, starget, fmt, a...) \
337 : dev_printk(prefix, &(starget)->dev, fmt, ##a)
338 :
339 : extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
340 : uint, uint, u64, void *hostdata);
341 : extern int scsi_add_device(struct Scsi_Host *host, uint channel,
342 : uint target, u64 lun);
343 : extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);
344 : extern void scsi_remove_device(struct scsi_device *);
345 : extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);
346 : void scsi_attach_vpd(struct scsi_device *sdev);
347 :
348 : extern struct scsi_device *scsi_device_from_queue(struct request_queue *q);
349 : extern int __must_check scsi_device_get(struct scsi_device *);
350 : extern void scsi_device_put(struct scsi_device *);
351 : extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
352 : uint, uint, u64);
353 : extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
354 : uint, uint, u64);
355 : extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
356 : u64);
357 : extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,
358 : u64);
359 : extern void starget_for_each_device(struct scsi_target *, void *,
360 : void (*fn)(struct scsi_device *, void *));
361 : extern void __starget_for_each_device(struct scsi_target *, void *,
362 : void (*fn)(struct scsi_device *,
363 : void *));
364 :
365 : /* only exposed to implement shost_for_each_device */
366 : extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
367 : struct scsi_device *);
368 :
369 : /**
370 : * shost_for_each_device - iterate over all devices of a host
371 : * @sdev: the &struct scsi_device to use as a cursor
372 : * @shost: the &struct scsi_host to iterate over
373 : *
374 : * Iterator that returns each device attached to @shost. This loop
375 : * takes a reference on each device and releases it at the end. If
376 : * you break out of the loop, you must call scsi_device_put(sdev).
377 : */
378 : #define shost_for_each_device(sdev, shost) \
379 : for ((sdev) = __scsi_iterate_devices((shost), NULL); \
380 : (sdev); \
381 : (sdev) = __scsi_iterate_devices((shost), (sdev)))
382 :
383 : /**
384 : * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
385 : * @sdev: the &struct scsi_device to use as a cursor
386 : * @shost: the &struct scsi_host to iterate over
387 : *
388 : * Iterator that returns each device attached to @shost. It does _not_
389 : * take a reference on the scsi_device, so the whole loop must be
390 : * protected by shost->host_lock.
391 : *
392 : * Note: The only reason to use this is because you need to access the
393 : * device list in interrupt context. Otherwise you really want to use
394 : * shost_for_each_device instead.
395 : */
396 : #define __shost_for_each_device(sdev, shost) \
397 : list_for_each_entry((sdev), &((shost)->__devices), siblings)
398 :
399 : extern int scsi_change_queue_depth(struct scsi_device *, int);
400 : extern int scsi_track_queue_full(struct scsi_device *, int);
401 :
402 : extern int scsi_set_medium_removal(struct scsi_device *, char);
403 :
404 : extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
405 : unsigned char *buffer, int len, int timeout,
406 : int retries, struct scsi_mode_data *data,
407 : struct scsi_sense_hdr *);
408 : extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
409 : int modepage, unsigned char *buffer, int len,
410 : int timeout, int retries,
411 : struct scsi_mode_data *data,
412 : struct scsi_sense_hdr *);
413 : extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
414 : int retries, struct scsi_sense_hdr *sshdr);
415 : extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf,
416 : int buf_len);
417 : extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
418 : unsigned int len, unsigned char opcode);
419 : extern int scsi_device_set_state(struct scsi_device *sdev,
420 : enum scsi_device_state state);
421 : extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
422 : gfp_t gfpflags);
423 : extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt);
424 : extern void sdev_evt_send_simple(struct scsi_device *sdev,
425 : enum scsi_device_event evt_type, gfp_t gfpflags);
426 : extern int scsi_device_quiesce(struct scsi_device *sdev);
427 : extern void scsi_device_resume(struct scsi_device *sdev);
428 : extern void scsi_target_quiesce(struct scsi_target *);
429 : extern void scsi_target_resume(struct scsi_target *);
430 : extern void scsi_scan_target(struct device *parent, unsigned int channel,
431 : unsigned int id, u64 lun,
432 : enum scsi_scan_mode rescan);
433 : extern void scsi_target_reap(struct scsi_target *);
434 : extern void scsi_target_block(struct device *);
435 : extern void scsi_target_unblock(struct device *, enum scsi_device_state);
436 : extern void scsi_remove_target(struct device *);
437 : extern const char *scsi_device_state_name(enum scsi_device_state);
438 : extern int scsi_is_sdev_device(const struct device *);
439 : extern int scsi_is_target_device(const struct device *);
440 : extern void scsi_sanitize_inquiry_string(unsigned char *s, int len);
441 : extern int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
442 : int data_direction, void *buffer, unsigned bufflen,
443 : unsigned char *sense, struct scsi_sense_hdr *sshdr,
444 : int timeout, int retries, u64 flags,
445 : req_flags_t rq_flags, int *resid);
446 : /* Make sure any sense buffer is the correct size. */
447 : #define scsi_execute(sdev, cmd, data_direction, buffer, bufflen, sense, \
448 : sshdr, timeout, retries, flags, rq_flags, resid) \
449 : ({ \
450 : BUILD_BUG_ON((sense) != NULL && \
451 : sizeof(sense) != SCSI_SENSE_BUFFERSIZE); \
452 : __scsi_execute(sdev, cmd, data_direction, buffer, bufflen, \
453 : sense, sshdr, timeout, retries, flags, rq_flags, \
454 : resid); \
455 : })
456 0 : static inline int scsi_execute_req(struct scsi_device *sdev,
457 : const unsigned char *cmd, int data_direction, void *buffer,
458 : unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
459 : int retries, int *resid)
460 : {
461 0 : return scsi_execute(sdev, cmd, data_direction, buffer,
462 : bufflen, NULL, sshdr, timeout, retries, 0, 0, resid);
463 : }
464 : extern void sdev_disable_disk_events(struct scsi_device *sdev);
465 : extern void sdev_enable_disk_events(struct scsi_device *sdev);
466 : extern int scsi_vpd_lun_id(struct scsi_device *, char *, size_t);
467 : extern int scsi_vpd_tpg_id(struct scsi_device *, int *);
468 :
469 : #ifdef CONFIG_PM
470 : extern int scsi_autopm_get_device(struct scsi_device *);
471 : extern void scsi_autopm_put_device(struct scsi_device *);
472 : #else
473 0 : static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; }
474 0 : static inline void scsi_autopm_put_device(struct scsi_device *d) {}
475 : #endif /* CONFIG_PM */
476 :
477 : static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)
478 : {
479 : return device_reprobe(&sdev->sdev_gendev);
480 : }
481 :
482 0 : static inline unsigned int sdev_channel(struct scsi_device *sdev)
483 : {
484 0 : return sdev->channel;
485 : }
486 :
487 0 : static inline unsigned int sdev_id(struct scsi_device *sdev)
488 : {
489 0 : return sdev->id;
490 : }
491 :
492 : #define scmd_id(scmd) sdev_id((scmd)->device)
493 : #define scmd_channel(scmd) sdev_channel((scmd)->device)
494 :
495 : /*
496 : * checks for positions of the SCSI state machine
497 : */
498 0 : static inline int scsi_device_online(struct scsi_device *sdev)
499 : {
500 0 : return (sdev->sdev_state != SDEV_OFFLINE &&
501 0 : sdev->sdev_state != SDEV_TRANSPORT_OFFLINE &&
502 : sdev->sdev_state != SDEV_DEL);
503 : }
504 0 : static inline int scsi_device_blocked(struct scsi_device *sdev)
505 : {
506 0 : return sdev->sdev_state == SDEV_BLOCK ||
507 : sdev->sdev_state == SDEV_CREATED_BLOCK;
508 : }
509 0 : static inline int scsi_device_created(struct scsi_device *sdev)
510 : {
511 0 : return sdev->sdev_state == SDEV_CREATED ||
512 : sdev->sdev_state == SDEV_CREATED_BLOCK;
513 : }
514 :
515 : int scsi_internal_device_block_nowait(struct scsi_device *sdev);
516 : int scsi_internal_device_unblock_nowait(struct scsi_device *sdev,
517 : enum scsi_device_state new_state);
518 :
519 : /* accessor functions for the SCSI parameters */
520 : static inline int scsi_device_sync(struct scsi_device *sdev)
521 : {
522 : return sdev->sdtr;
523 : }
524 : static inline int scsi_device_wide(struct scsi_device *sdev)
525 : {
526 : return sdev->wdtr;
527 : }
528 : static inline int scsi_device_dt(struct scsi_device *sdev)
529 : {
530 : return sdev->ppr;
531 : }
532 : static inline int scsi_device_dt_only(struct scsi_device *sdev)
533 : {
534 : if (sdev->inquiry_len < 57)
535 : return 0;
536 : return (sdev->inquiry[56] & 0x0c) == 0x04;
537 : }
538 : static inline int scsi_device_ius(struct scsi_device *sdev)
539 : {
540 : if (sdev->inquiry_len < 57)
541 : return 0;
542 : return sdev->inquiry[56] & 0x01;
543 : }
544 : static inline int scsi_device_qas(struct scsi_device *sdev)
545 : {
546 : if (sdev->inquiry_len < 57)
547 : return 0;
548 : return sdev->inquiry[56] & 0x02;
549 : }
550 : static inline int scsi_device_enclosure(struct scsi_device *sdev)
551 : {
552 : return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1;
553 : }
554 :
555 0 : static inline int scsi_device_protection(struct scsi_device *sdev)
556 : {
557 0 : if (sdev->no_dif)
558 : return 0;
559 :
560 0 : return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0);
561 : }
562 :
563 : static inline int scsi_device_tpgs(struct scsi_device *sdev)
564 : {
565 : return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0;
566 : }
567 :
568 : /**
569 : * scsi_device_supports_vpd - test if a device supports VPD pages
570 : * @sdev: the &struct scsi_device to test
571 : *
572 : * If the 'try_vpd_pages' flag is set it takes precedence.
573 : * Otherwise we will assume VPD pages are supported if the
574 : * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set.
575 : */
576 0 : static inline int scsi_device_supports_vpd(struct scsi_device *sdev)
577 : {
578 : /* Attempt VPD inquiry if the device blacklist explicitly calls
579 : * for it.
580 : */
581 0 : if (sdev->try_vpd_pages)
582 : return 1;
583 : /*
584 : * Although VPD inquiries can go to SCSI-2 type devices,
585 : * some USB ones crash on receiving them, and the pages
586 : * we currently ask for are mandatory for SPC-2 and beyond
587 : */
588 0 : if (sdev->scsi_level >= SCSI_SPC_2 && !sdev->skip_vpd_pages)
589 : return 1;
590 : return 0;
591 : }
592 :
593 : #define MODULE_ALIAS_SCSI_DEVICE(type) \
594 : MODULE_ALIAS("scsi:t-" __stringify(type) "*")
595 : #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
596 :
597 : #endif /* _SCSI_SCSI_DEVICE_H */
|
