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1 : : #ifndef _SCSI_SCSI_DEVICE_H
2 : : #define _SCSI_SCSI_DEVICE_H
3 : :
4 : : #include <linux/list.h>
5 : : #include <linux/spinlock.h>
6 : : #include <linux/workqueue.h>
7 : : #include <linux/blkdev.h>
8 : : #include <scsi/scsi.h>
9 : : #include <linux/atomic.h>
10 : :
11 : : struct device;
12 : : struct request_queue;
13 : : struct scsi_cmnd;
14 : : struct scsi_lun;
15 : : struct scsi_sense_hdr;
16 : :
17 : : struct scsi_mode_data {
18 : : __u32 length;
19 : : __u16 block_descriptor_length;
20 : : __u8 medium_type;
21 : : __u8 device_specific;
22 : : __u8 header_length;
23 : : __u8 longlba:1;
24 : : };
25 : :
26 : : /*
27 : : * sdev state: If you alter this, you also need to alter scsi_sysfs.c
28 : : * (for the ascii descriptions) and the state model enforcer:
29 : : * scsi_lib:scsi_device_set_state().
30 : : */
31 : : enum scsi_device_state {
32 : : SDEV_CREATED = 1, /* device created but not added to sysfs
33 : : * Only internal commands allowed (for inq) */
34 : : SDEV_RUNNING, /* device properly configured
35 : : * All commands allowed */
36 : : SDEV_CANCEL, /* beginning to delete device
37 : : * Only error handler commands allowed */
38 : : SDEV_DEL, /* device deleted
39 : : * no commands allowed */
40 : : SDEV_QUIESCE, /* Device quiescent. No block commands
41 : : * will be accepted, only specials (which
42 : : * originate in the mid-layer) */
43 : : SDEV_OFFLINE, /* Device offlined (by error handling or
44 : : * user request */
45 : : SDEV_TRANSPORT_OFFLINE, /* Offlined by transport class error handler */
46 : : SDEV_BLOCK, /* Device blocked by scsi lld. No
47 : : * scsi commands from user or midlayer
48 : : * should be issued to the scsi
49 : : * lld. */
50 : : SDEV_CREATED_BLOCK, /* same as above but for created devices */
51 : : };
52 : :
53 : : enum scsi_device_event {
54 : : SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */
55 : : SDEV_EVT_INQUIRY_CHANGE_REPORTED, /* 3F 03 UA reported */
56 : : SDEV_EVT_CAPACITY_CHANGE_REPORTED, /* 2A 09 UA reported */
57 : : SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED, /* 38 07 UA reported */
58 : : SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */
59 : : SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */
60 : :
61 : : SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE,
62 : : SDEV_EVT_LAST = SDEV_EVT_LUN_CHANGE_REPORTED,
63 : :
64 : : SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1
65 : : };
66 : :
67 : : struct scsi_event {
68 : : enum scsi_device_event evt_type;
69 : : struct list_head node;
70 : :
71 : : /* put union of data structures, for non-simple event types,
72 : : * here
73 : : */
74 : : };
75 : :
76 : : struct scsi_device {
77 : : struct Scsi_Host *host;
78 : : struct request_queue *request_queue;
79 : :
80 : : /* the next two are protected by the host->host_lock */
81 : : struct list_head siblings; /* list of all devices on this host */
82 : : struct list_head same_target_siblings; /* just the devices sharing same target id */
83 : :
84 : : /* this is now protected by the request_queue->queue_lock */
85 : : unsigned int device_busy; /* commands actually active on
86 : : * low-level. protected by queue_lock. */
87 : : spinlock_t list_lock;
88 : : struct list_head cmd_list; /* queue of in use SCSI Command structures */
89 : : struct list_head starved_entry;
90 : : struct scsi_cmnd *current_cmnd; /* currently active command */
91 : : unsigned short queue_depth; /* How deep of a queue we want */
92 : : unsigned short max_queue_depth; /* max queue depth */
93 : : unsigned short last_queue_full_depth; /* These two are used by */
94 : : unsigned short last_queue_full_count; /* scsi_track_queue_full() */
95 : : unsigned long last_queue_full_time; /* last queue full time */
96 : : unsigned long queue_ramp_up_period; /* ramp up period in jiffies */
97 : : #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ)
98 : :
99 : : unsigned long last_queue_ramp_up; /* last queue ramp up time */
100 : :
101 : : unsigned int id, lun, channel;
102 : :
103 : : unsigned int manufacturer; /* Manufacturer of device, for using
104 : : * vendor-specific cmd's */
105 : : unsigned sector_size; /* size in bytes */
106 : :
107 : : void *hostdata; /* available to low-level driver */
108 : : char type;
109 : : char scsi_level;
110 : : char inq_periph_qual; /* PQ from INQUIRY data */
111 : : unsigned char inquiry_len; /* valid bytes in 'inquiry' */
112 : : unsigned char * inquiry; /* INQUIRY response data */
113 : : const char * vendor; /* [back_compat] point into 'inquiry' ... */
114 : : const char * model; /* ... after scan; point to static string */
115 : : const char * rev; /* ... "nullnullnullnull" before scan */
116 : : unsigned char current_tag; /* current tag */
117 : : struct scsi_target *sdev_target; /* used only for single_lun */
118 : :
119 : : unsigned int sdev_bflags; /* black/white flags as also found in
120 : : * scsi_devinfo.[hc]. For now used only to
121 : : * pass settings from slave_alloc to scsi
122 : : * core. */
123 : : unsigned int eh_timeout; /* Error handling timeout */
124 : : unsigned writeable:1;
125 : : unsigned removable:1;
126 : : unsigned changed:1; /* Data invalid due to media change */
127 : : unsigned busy:1; /* Used to prevent races */
128 : : unsigned lockable:1; /* Able to prevent media removal */
129 : : unsigned locked:1; /* Media removal disabled */
130 : : unsigned borken:1; /* Tell the Seagate driver to be
131 : : * painfully slow on this device */
132 : : unsigned disconnect:1; /* can disconnect */
133 : : unsigned soft_reset:1; /* Uses soft reset option */
134 : : unsigned sdtr:1; /* Device supports SDTR messages */
135 : : unsigned wdtr:1; /* Device supports WDTR messages */
136 : : unsigned ppr:1; /* Device supports PPR messages */
137 : : unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */
138 : : unsigned simple_tags:1; /* simple queue tag messages are enabled */
139 : : unsigned ordered_tags:1;/* ordered queue tag messages are enabled */
140 : : unsigned was_reset:1; /* There was a bus reset on the bus for
141 : : * this device */
142 : : unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
143 : : * because we did a bus reset. */
144 : : unsigned use_10_for_rw:1; /* first try 10-byte read / write */
145 : : unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
146 : : unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */
147 : : unsigned no_write_same:1; /* no WRITE SAME command */
148 : : unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */
149 : : unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */
150 : : unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */
151 : : unsigned skip_vpd_pages:1; /* do not read VPD pages */
152 : : unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
153 : : unsigned no_start_on_add:1; /* do not issue start on add */
154 : : unsigned allow_restart:1; /* issue START_UNIT in error handler */
155 : : unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */
156 : : unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */
157 : : unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
158 : : unsigned select_no_atn:1;
159 : : unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */
160 : : unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */
161 : : unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */
162 : : unsigned last_sector_bug:1; /* do not use multisector accesses on
163 : : SD_LAST_BUGGY_SECTORS */
164 : : unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */
165 : : unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */
166 : : unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */
167 : : unsigned is_visible:1; /* is the device visible in sysfs */
168 : : unsigned wce_default_on:1; /* Cache is ON by default */
169 : : unsigned no_dif:1; /* T10 PI (DIF) should be disabled */
170 : :
171 : : atomic_t disk_events_disable_depth; /* disable depth for disk events */
172 : :
173 : : DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
174 : : DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */
175 : : struct list_head event_list; /* asserted events */
176 : : struct work_struct event_work;
177 : :
178 : : unsigned int device_blocked; /* Device returned QUEUE_FULL. */
179 : :
180 : : unsigned int max_device_blocked; /* what device_blocked counts down from */
181 : : #define SCSI_DEFAULT_DEVICE_BLOCKED 3
182 : :
183 : : atomic_t iorequest_cnt;
184 : : atomic_t iodone_cnt;
185 : : atomic_t ioerr_cnt;
186 : :
187 : : struct device sdev_gendev,
188 : : sdev_dev;
189 : :
190 : : struct execute_work ew; /* used to get process context on put */
191 : : struct work_struct requeue_work;
192 : :
193 : : struct scsi_dh_data *scsi_dh_data;
194 : : enum scsi_device_state sdev_state;
195 : : unsigned long sdev_data[0];
196 : : } __attribute__((aligned(sizeof(unsigned long))));
197 : :
198 : : struct scsi_dh_devlist {
199 : : char *vendor;
200 : : char *model;
201 : : };
202 : :
203 : : typedef void (*activate_complete)(void *, int);
204 : : struct scsi_device_handler {
205 : : /* Used by the infrastructure */
206 : : struct list_head list; /* list of scsi_device_handlers */
207 : :
208 : : /* Filled by the hardware handler */
209 : : struct module *module;
210 : : const char *name;
211 : : const struct scsi_dh_devlist *devlist;
212 : : int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
213 : : int (*attach)(struct scsi_device *);
214 : : void (*detach)(struct scsi_device *);
215 : : int (*activate)(struct scsi_device *, activate_complete, void *);
216 : : int (*prep_fn)(struct scsi_device *, struct request *);
217 : : int (*set_params)(struct scsi_device *, const char *);
218 : : bool (*match)(struct scsi_device *);
219 : : };
220 : :
221 : : struct scsi_dh_data {
222 : : struct scsi_device_handler *scsi_dh;
223 : : struct scsi_device *sdev;
224 : : struct kref kref;
225 : : char buf[0];
226 : : };
227 : :
228 : : #define to_scsi_device(d) \
229 : : container_of(d, struct scsi_device, sdev_gendev)
230 : : #define class_to_sdev(d) \
231 : : container_of(d, struct scsi_device, sdev_dev)
232 : : #define transport_class_to_sdev(class_dev) \
233 : : to_scsi_device(class_dev->parent)
234 : :
235 : : #define sdev_printk(prefix, sdev, fmt, a...) \
236 : : dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
237 : :
238 : : #define scmd_printk(prefix, scmd, fmt, a...) \
239 : : (scmd)->request->rq_disk ? \
240 : : sdev_printk(prefix, (scmd)->device, "[%s] " fmt, \
241 : : (scmd)->request->rq_disk->disk_name, ##a) : \
242 : : sdev_printk(prefix, (scmd)->device, fmt, ##a)
243 : :
244 : : enum scsi_target_state {
245 : : STARGET_CREATED = 1,
246 : : STARGET_RUNNING,
247 : : STARGET_DEL,
248 : : };
249 : :
250 : : /*
251 : : * scsi_target: representation of a scsi target, for now, this is only
252 : : * used for single_lun devices. If no one has active IO to the target,
253 : : * starget_sdev_user is NULL, else it points to the active sdev.
254 : : */
255 : : struct scsi_target {
256 : : struct scsi_device *starget_sdev_user;
257 : : struct list_head siblings;
258 : : struct list_head devices;
259 : : struct device dev;
260 : : unsigned int reap_ref; /* protected by the host lock */
261 : : unsigned int channel;
262 : : unsigned int id; /* target id ... replace
263 : : * scsi_device.id eventually */
264 : : unsigned int create:1; /* signal that it needs to be added */
265 : : unsigned int single_lun:1; /* Indicates we should only
266 : : * allow I/O to one of the luns
267 : : * for the device at a time. */
268 : : unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f
269 : : * means no lun present. */
270 : : unsigned int no_report_luns:1; /* Don't use
271 : : * REPORT LUNS for scanning. */
272 : : unsigned int expecting_lun_change:1; /* A device has reported
273 : : * a 3F/0E UA, other devices on
274 : : * the same target will also. */
275 : : /* commands actually active on LLD. protected by host lock. */
276 : : unsigned int target_busy;
277 : : /*
278 : : * LLDs should set this in the slave_alloc host template callout.
279 : : * If set to zero then there is not limit.
280 : : */
281 : : unsigned int can_queue;
282 : : unsigned int target_blocked;
283 : : unsigned int max_target_blocked;
284 : : #define SCSI_DEFAULT_TARGET_BLOCKED 3
285 : :
286 : : char scsi_level;
287 : : struct execute_work ew;
288 : : enum scsi_target_state state;
289 : : void *hostdata; /* available to low-level driver */
290 : : unsigned long starget_data[0]; /* for the transport */
291 : : /* starget_data must be the last element!!!! */
292 : : } __attribute__((aligned(sizeof(unsigned long))));
293 : :
294 : : #define to_scsi_target(d) container_of(d, struct scsi_target, dev)
295 : : static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
296 : : {
297 : : return to_scsi_target(sdev->sdev_gendev.parent);
298 : : }
299 : : #define transport_class_to_starget(class_dev) \
300 : : to_scsi_target(class_dev->parent)
301 : :
302 : : #define starget_printk(prefix, starget, fmt, a...) \
303 : : dev_printk(prefix, &(starget)->dev, fmt, ##a)
304 : :
305 : : extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
306 : : uint, uint, uint, void *hostdata);
307 : : extern int scsi_add_device(struct Scsi_Host *host, uint channel,
308 : : uint target, uint lun);
309 : : extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);
310 : : extern void scsi_remove_device(struct scsi_device *);
311 : : extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);
312 : :
313 : : extern int scsi_device_get(struct scsi_device *);
314 : : extern void scsi_device_put(struct scsi_device *);
315 : : extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
316 : : uint, uint, uint);
317 : : extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
318 : : uint, uint, uint);
319 : : extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
320 : : uint);
321 : : extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,
322 : : uint);
323 : : extern void starget_for_each_device(struct scsi_target *, void *,
324 : : void (*fn)(struct scsi_device *, void *));
325 : : extern void __starget_for_each_device(struct scsi_target *, void *,
326 : : void (*fn)(struct scsi_device *,
327 : : void *));
328 : :
329 : : /* only exposed to implement shost_for_each_device */
330 : : extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
331 : : struct scsi_device *);
332 : :
333 : : /**
334 : : * shost_for_each_device - iterate over all devices of a host
335 : : * @sdev: the &struct scsi_device to use as a cursor
336 : : * @shost: the &struct scsi_host to iterate over
337 : : *
338 : : * Iterator that returns each device attached to @shost. This loop
339 : : * takes a reference on each device and releases it at the end. If
340 : : * you break out of the loop, you must call scsi_device_put(sdev).
341 : : */
342 : : #define shost_for_each_device(sdev, shost) \
343 : : for ((sdev) = __scsi_iterate_devices((shost), NULL); \
344 : : (sdev); \
345 : : (sdev) = __scsi_iterate_devices((shost), (sdev)))
346 : :
347 : : /**
348 : : * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
349 : : * @sdev: the &struct scsi_device to use as a cursor
350 : : * @shost: the &struct scsi_host to iterate over
351 : : *
352 : : * Iterator that returns each device attached to @shost. It does _not_
353 : : * take a reference on the scsi_device, so the whole loop must be
354 : : * protected by shost->host_lock.
355 : : *
356 : : * Note: The only reason to use this is because you need to access the
357 : : * device list in interrupt context. Otherwise you really want to use
358 : : * shost_for_each_device instead.
359 : : */
360 : : #define __shost_for_each_device(sdev, shost) \
361 : : list_for_each_entry((sdev), &((shost)->__devices), siblings)
362 : :
363 : : extern void scsi_adjust_queue_depth(struct scsi_device *, int, int);
364 : : extern int scsi_track_queue_full(struct scsi_device *, int);
365 : :
366 : : extern int scsi_set_medium_removal(struct scsi_device *, char);
367 : :
368 : : extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
369 : : unsigned char *buffer, int len, int timeout,
370 : : int retries, struct scsi_mode_data *data,
371 : : struct scsi_sense_hdr *);
372 : : extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
373 : : int modepage, unsigned char *buffer, int len,
374 : : int timeout, int retries,
375 : : struct scsi_mode_data *data,
376 : : struct scsi_sense_hdr *);
377 : : extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
378 : : int retries, struct scsi_sense_hdr *sshdr);
379 : : extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf,
380 : : int buf_len);
381 : : extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
382 : : unsigned int len, unsigned char opcode);
383 : : extern int scsi_device_set_state(struct scsi_device *sdev,
384 : : enum scsi_device_state state);
385 : : extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
386 : : gfp_t gfpflags);
387 : : extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt);
388 : : extern void sdev_evt_send_simple(struct scsi_device *sdev,
389 : : enum scsi_device_event evt_type, gfp_t gfpflags);
390 : : extern int scsi_device_quiesce(struct scsi_device *sdev);
391 : : extern void scsi_device_resume(struct scsi_device *sdev);
392 : : extern void scsi_target_quiesce(struct scsi_target *);
393 : : extern void scsi_target_resume(struct scsi_target *);
394 : : extern void scsi_scan_target(struct device *parent, unsigned int channel,
395 : : unsigned int id, unsigned int lun, int rescan);
396 : : extern void scsi_target_reap(struct scsi_target *);
397 : : extern void scsi_target_block(struct device *);
398 : : extern void scsi_target_unblock(struct device *, enum scsi_device_state);
399 : : extern void scsi_remove_target(struct device *);
400 : : extern void int_to_scsilun(unsigned int, struct scsi_lun *);
401 : : extern int scsilun_to_int(struct scsi_lun *);
402 : : extern const char *scsi_device_state_name(enum scsi_device_state);
403 : : extern int scsi_is_sdev_device(const struct device *);
404 : : extern int scsi_is_target_device(const struct device *);
405 : : extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
406 : : int data_direction, void *buffer, unsigned bufflen,
407 : : unsigned char *sense, int timeout, int retries,
408 : : int flag, int *resid);
409 : : extern int scsi_execute_req_flags(struct scsi_device *sdev,
410 : : const unsigned char *cmd, int data_direction, void *buffer,
411 : : unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
412 : : int retries, int *resid, int flags);
413 : : static inline int scsi_execute_req(struct scsi_device *sdev,
414 : : const unsigned char *cmd, int data_direction, void *buffer,
415 : : unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
416 : : int retries, int *resid)
417 : : {
418 : 14876 : return scsi_execute_req_flags(sdev, cmd, data_direction, buffer,
419 : : bufflen, sshdr, timeout, retries, resid, 0);
420 : : }
421 : : extern void sdev_disable_disk_events(struct scsi_device *sdev);
422 : : extern void sdev_enable_disk_events(struct scsi_device *sdev);
423 : :
424 : : #ifdef CONFIG_PM_RUNTIME
425 : : extern int scsi_autopm_get_device(struct scsi_device *);
426 : : extern void scsi_autopm_put_device(struct scsi_device *);
427 : : #else
428 : : static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; }
429 : : static inline void scsi_autopm_put_device(struct scsi_device *d) {}
430 : : #endif /* CONFIG_PM_RUNTIME */
431 : :
432 : : static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)
433 : : {
434 : : return device_reprobe(&sdev->sdev_gendev);
435 : : }
436 : :
437 : : static inline unsigned int sdev_channel(struct scsi_device *sdev)
438 : : {
439 : : return sdev->channel;
440 : : }
441 : :
442 : : static inline unsigned int sdev_id(struct scsi_device *sdev)
443 : : {
444 : : return sdev->id;
445 : : }
446 : :
447 : : #define scmd_id(scmd) sdev_id((scmd)->device)
448 : : #define scmd_channel(scmd) sdev_channel((scmd)->device)
449 : :
450 : : /*
451 : : * checks for positions of the SCSI state machine
452 : : */
453 : : static inline int scsi_device_online(struct scsi_device *sdev)
454 : : {
455 : 0 : return (sdev->sdev_state != SDEV_OFFLINE &&
456 : 1205937 : sdev->sdev_state != SDEV_TRANSPORT_OFFLINE &&
457 : : sdev->sdev_state != SDEV_DEL);
458 : : }
459 : : static inline int scsi_device_blocked(struct scsi_device *sdev)
460 : : {
461 : 401979 : return sdev->sdev_state == SDEV_BLOCK ||
462 : : sdev->sdev_state == SDEV_CREATED_BLOCK;
463 : : }
464 : : static inline int scsi_device_created(struct scsi_device *sdev)
465 : : {
466 : 0 : return sdev->sdev_state == SDEV_CREATED ||
467 : : sdev->sdev_state == SDEV_CREATED_BLOCK;
468 : : }
469 : :
470 : : /* accessor functions for the SCSI parameters */
471 : : static inline int scsi_device_sync(struct scsi_device *sdev)
472 : : {
473 : : return sdev->sdtr;
474 : : }
475 : : static inline int scsi_device_wide(struct scsi_device *sdev)
476 : : {
477 : : return sdev->wdtr;
478 : : }
479 : : static inline int scsi_device_dt(struct scsi_device *sdev)
480 : : {
481 : : return sdev->ppr;
482 : : }
483 : : static inline int scsi_device_dt_only(struct scsi_device *sdev)
484 : : {
485 : : if (sdev->inquiry_len < 57)
486 : : return 0;
487 : : return (sdev->inquiry[56] & 0x0c) == 0x04;
488 : : }
489 : : static inline int scsi_device_ius(struct scsi_device *sdev)
490 : : {
491 : : if (sdev->inquiry_len < 57)
492 : : return 0;
493 : : return sdev->inquiry[56] & 0x01;
494 : : }
495 : : static inline int scsi_device_qas(struct scsi_device *sdev)
496 : : {
497 : : if (sdev->inquiry_len < 57)
498 : : return 0;
499 : : return sdev->inquiry[56] & 0x02;
500 : : }
501 : : static inline int scsi_device_enclosure(struct scsi_device *sdev)
502 : : {
503 : : return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1;
504 : : }
505 : :
506 : : static inline int scsi_device_protection(struct scsi_device *sdev)
507 : : {
508 [ # # ][ # # ]: 4689 : if (sdev->no_dif)
[ + - ]
509 : : return 0;
510 : :
511 [ # # ][ # # ]: 4689 : return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0);
[ # # ][ # # ]
[ + - ][ + - ]
512 : : }
513 : :
514 : : static inline int scsi_device_tpgs(struct scsi_device *sdev)
515 : : {
516 : : return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0;
517 : : }
518 : :
519 : : #define MODULE_ALIAS_SCSI_DEVICE(type) \
520 : : MODULE_ALIAS("scsi:t-" __stringify(type) "*")
521 : : #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
522 : :
523 : : #endif /* _SCSI_SCSI_DEVICE_H */
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