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 ; |
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 | spinlock_t list_lock; |
113 | struct list_head cmd_list; /* queue of in use SCSI Command structures */ |
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_pg83; |
144 | struct scsi_vpd __rcu *vpd_pg80; |
145 | unsigned char current_tag; /* current tag */ |
146 | struct scsi_target *sdev_target; /* used only for single_lun */ |
147 | |
148 | blist_flags_t sdev_bflags; /* black/white flags as also found in |
149 | * scsi_devinfo.[hc]. For now used only to |
150 | * pass settings from slave_alloc to scsi |
151 | * core. */ |
152 | unsigned int eh_timeout; /* Error handling timeout */ |
153 | unsigned removable:1; |
154 | unsigned changed:1; /* Data invalid due to media change */ |
155 | unsigned busy:1; /* Used to prevent races */ |
156 | unsigned lockable:1; /* Able to prevent media removal */ |
157 | unsigned locked:1; /* Media removal disabled */ |
158 | unsigned borken:1; /* Tell the Seagate driver to be |
159 | * painfully slow on this device */ |
160 | unsigned disconnect:1; /* can disconnect */ |
161 | unsigned soft_reset:1; /* Uses soft reset option */ |
162 | unsigned sdtr:1; /* Device supports SDTR messages */ |
163 | unsigned wdtr:1; /* Device supports WDTR messages */ |
164 | unsigned ppr:1; /* Device supports PPR messages */ |
165 | unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ |
166 | unsigned simple_tags:1; /* simple queue tag messages are enabled */ |
167 | unsigned was_reset:1; /* There was a bus reset on the bus for |
168 | * this device */ |
169 | unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN |
170 | * because we did a bus reset. */ |
171 | unsigned use_10_for_rw:1; /* first try 10-byte read / write */ |
172 | unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ |
173 | unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ |
174 | unsigned no_write_same:1; /* no WRITE SAME command */ |
175 | unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ |
176 | unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ |
177 | unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ |
178 | unsigned skip_vpd_pages:1; /* do not read VPD pages */ |
179 | unsigned try_vpd_pages:1; /* attempt to read VPD pages */ |
180 | unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ |
181 | unsigned no_start_on_add:1; /* do not issue start on add */ |
182 | unsigned allow_restart:1; /* issue START_UNIT in error handler */ |
183 | unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ |
184 | unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ |
185 | unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ |
186 | unsigned select_no_atn:1; |
187 | unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ |
188 | unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ |
189 | unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ |
190 | unsigned last_sector_bug:1; /* do not use multisector accesses on |
191 | SD_LAST_BUGGY_SECTORS */ |
192 | unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */ |
193 | unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */ |
194 | unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */ |
195 | unsigned security_supported:1; /* Supports Security Protocols */ |
196 | unsigned is_visible:1; /* is the device visible in sysfs */ |
197 | unsigned wce_default_on:1; /* Cache is ON by default */ |
198 | unsigned no_dif:1; /* T10 PI (DIF) should be disabled */ |
199 | unsigned broken_fua:1; /* Don't set FUA bit */ |
200 | unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */ |
201 | unsigned unmap_limit_for_ws:1; /* Use the UNMAP limit for WRITE SAME */ |
202 | |
203 | atomic_t disk_events_disable_depth; /* disable depth for disk events */ |
204 | |
205 | DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ |
206 | DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */ |
207 | struct list_head event_list; /* asserted events */ |
208 | struct work_struct event_work; |
209 | |
210 | unsigned int max_device_blocked; /* what device_blocked counts down from */ |
211 | #define SCSI_DEFAULT_DEVICE_BLOCKED 3 |
212 | |
213 | atomic_t iorequest_cnt; |
214 | atomic_t iodone_cnt; |
215 | atomic_t ioerr_cnt; |
216 | |
217 | struct device sdev_gendev, |
218 | sdev_dev; |
219 | |
220 | struct execute_work ew; /* used to get process context on put */ |
221 | struct work_struct requeue_work; |
222 | |
223 | struct scsi_device_handler *handler; |
224 | void *handler_data; |
225 | |
226 | unsigned char access_state; |
227 | struct mutex state_mutex; |
228 | enum scsi_device_state sdev_state; |
229 | struct task_struct *quiesced_by; |
230 | unsigned long sdev_data[0]; |
231 | } __attribute__((aligned(sizeof(unsigned long)))); |
232 | |
233 | #define to_scsi_device(d) \ |
234 | container_of(d, struct scsi_device, sdev_gendev) |
235 | #define class_to_sdev(d) \ |
236 | container_of(d, struct scsi_device, sdev_dev) |
237 | #define transport_class_to_sdev(class_dev) \ |
238 | to_scsi_device(class_dev->parent) |
239 | |
240 | #define sdev_dbg(sdev, fmt, a...) \ |
241 | dev_dbg(&(sdev)->sdev_gendev, fmt, ##a) |
242 | |
243 | /* |
244 | * like scmd_printk, but the device name is passed in |
245 | * as a string pointer |
246 | */ |
247 | __printf(4, 5) void |
248 | sdev_prefix_printk(const char *, const struct scsi_device *, const char *, |
249 | const char *, ...); |
250 | |
251 | #define sdev_printk(l, sdev, fmt, a...) \ |
252 | sdev_prefix_printk(l, sdev, NULL, fmt, ##a) |
253 | |
254 | __printf(3, 4) void |
255 | scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...); |
256 | |
257 | #define scmd_dbg(scmd, fmt, a...) \ |
258 | do { \ |
259 | if ((scmd)->request->rq_disk) \ |
260 | sdev_dbg((scmd)->device, "[%s] " fmt, \ |
261 | (scmd)->request->rq_disk->disk_name, ##a);\ |
262 | else \ |
263 | sdev_dbg((scmd)->device, fmt, ##a); \ |
264 | } while (0) |
265 | |
266 | enum scsi_target_state { |
267 | STARGET_CREATED = 1, |
268 | STARGET_RUNNING, |
269 | STARGET_REMOVE, |
270 | STARGET_CREATED_REMOVE, |
271 | STARGET_DEL, |
272 | }; |
273 | |
274 | /* |
275 | * scsi_target: representation of a scsi target, for now, this is only |
276 | * used for single_lun devices. If no one has active IO to the target, |
277 | * starget_sdev_user is NULL, else it points to the active sdev. |
278 | */ |
279 | struct scsi_target { |
280 | struct scsi_device *starget_sdev_user; |
281 | struct list_head siblings; |
282 | struct list_head devices; |
283 | struct device dev; |
284 | struct kref reap_ref; /* last put renders target invisible */ |
285 | unsigned int channel; |
286 | unsigned int id; /* target id ... replace |
287 | * scsi_device.id eventually */ |
288 | unsigned int create:1; /* signal that it needs to be added */ |
289 | unsigned int single_lun:1; /* Indicates we should only |
290 | * allow I/O to one of the luns |
291 | * for the device at a time. */ |
292 | unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f |
293 | * means no lun present. */ |
294 | unsigned int no_report_luns:1; /* Don't use |
295 | * REPORT LUNS for scanning. */ |
296 | unsigned int expecting_lun_change:1; /* A device has reported |
297 | * a 3F/0E UA, other devices on |
298 | * the same target will also. */ |
299 | /* commands actually active on LLD. */ |
300 | atomic_t target_busy; |
301 | atomic_t target_blocked; |
302 | |
303 | /* |
304 | * LLDs should set this in the slave_alloc host template callout. |
305 | * If set to zero then there is not limit. |
306 | */ |
307 | unsigned int can_queue; |
308 | unsigned int max_target_blocked; |
309 | #define SCSI_DEFAULT_TARGET_BLOCKED 3 |
310 | |
311 | char scsi_level; |
312 | enum scsi_target_state state; |
313 | void *hostdata; /* available to low-level driver */ |
314 | unsigned long starget_data[0]; /* for the transport */ |
315 | /* starget_data must be the last element!!!! */ |
316 | } __attribute__((aligned(sizeof(unsigned long)))); |
317 | |
318 | #define to_scsi_target(d) container_of(d, struct scsi_target, dev) |
319 | static inline struct scsi_target *scsi_target(struct scsi_device *sdev) |
320 | { |
321 | return to_scsi_target(sdev->sdev_gendev.parent); |
322 | } |
323 | #define transport_class_to_starget(class_dev) \ |
324 | to_scsi_target(class_dev->parent) |
325 | |
326 | #define starget_printk(prefix, starget, fmt, a...) \ |
327 | dev_printk(prefix, &(starget)->dev, fmt, ##a) |
328 | |
329 | extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, |
330 | uint, uint, u64, void *hostdata); |
331 | extern int scsi_add_device(struct Scsi_Host *host, uint channel, |
332 | uint target, u64 lun); |
333 | extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); |
334 | extern void scsi_remove_device(struct scsi_device *); |
335 | extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); |
336 | void scsi_attach_vpd(struct scsi_device *sdev); |
337 | |
338 | extern struct scsi_device *scsi_device_from_queue(struct request_queue *q); |
339 | extern int __must_check scsi_device_get(struct scsi_device *); |
340 | extern void scsi_device_put(struct scsi_device *); |
341 | extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, |
342 | uint, uint, u64); |
343 | extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, |
344 | uint, uint, u64); |
345 | extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, |
346 | u64); |
347 | extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, |
348 | u64); |
349 | extern void starget_for_each_device(struct scsi_target *, void *, |
350 | void (*fn)(struct scsi_device *, void *)); |
351 | extern void __starget_for_each_device(struct scsi_target *, void *, |
352 | void (*fn)(struct scsi_device *, |
353 | void *)); |
354 | |
355 | /* only exposed to implement shost_for_each_device */ |
356 | extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, |
357 | struct scsi_device *); |
358 | |
359 | /** |
360 | * shost_for_each_device - iterate over all devices of a host |
361 | * @sdev: the &struct scsi_device to use as a cursor |
362 | * @shost: the &struct scsi_host to iterate over |
363 | * |
364 | * Iterator that returns each device attached to @shost. This loop |
365 | * takes a reference on each device and releases it at the end. If |
366 | * you break out of the loop, you must call scsi_device_put(sdev). |
367 | */ |
368 | #define shost_for_each_device(sdev, shost) \ |
369 | for ((sdev) = __scsi_iterate_devices((shost), NULL); \ |
370 | (sdev); \ |
371 | (sdev) = __scsi_iterate_devices((shost), (sdev))) |
372 | |
373 | /** |
374 | * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) |
375 | * @sdev: the &struct scsi_device to use as a cursor |
376 | * @shost: the &struct scsi_host to iterate over |
377 | * |
378 | * Iterator that returns each device attached to @shost. It does _not_ |
379 | * take a reference on the scsi_device, so the whole loop must be |
380 | * protected by shost->host_lock. |
381 | * |
382 | * Note: The only reason to use this is because you need to access the |
383 | * device list in interrupt context. Otherwise you really want to use |
384 | * shost_for_each_device instead. |
385 | */ |
386 | #define __shost_for_each_device(sdev, shost) \ |
387 | list_for_each_entry((sdev), &((shost)->__devices), siblings) |
388 | |
389 | extern int scsi_change_queue_depth(struct scsi_device *, int); |
390 | extern int scsi_track_queue_full(struct scsi_device *, int); |
391 | |
392 | extern int scsi_set_medium_removal(struct scsi_device *, char); |
393 | |
394 | extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, |
395 | unsigned char *buffer, int len, int timeout, |
396 | int retries, struct scsi_mode_data *data, |
397 | struct scsi_sense_hdr *); |
398 | extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, |
399 | int modepage, unsigned char *buffer, int len, |
400 | int timeout, int retries, |
401 | struct scsi_mode_data *data, |
402 | struct scsi_sense_hdr *); |
403 | extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, |
404 | int retries, struct scsi_sense_hdr *sshdr); |
405 | extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, |
406 | int buf_len); |
407 | extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, |
408 | unsigned int len, unsigned char opcode); |
409 | extern int scsi_device_set_state(struct scsi_device *sdev, |
410 | enum scsi_device_state state); |
411 | extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, |
412 | gfp_t gfpflags); |
413 | extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); |
414 | extern void sdev_evt_send_simple(struct scsi_device *sdev, |
415 | enum scsi_device_event evt_type, gfp_t gfpflags); |
416 | extern int scsi_device_quiesce(struct scsi_device *sdev); |
417 | extern void scsi_device_resume(struct scsi_device *sdev); |
418 | extern void scsi_target_quiesce(struct scsi_target *); |
419 | extern void scsi_target_resume(struct scsi_target *); |
420 | extern void scsi_scan_target(struct device *parent, unsigned int channel, |
421 | unsigned int id, u64 lun, |
422 | enum scsi_scan_mode rescan); |
423 | extern void scsi_target_reap(struct scsi_target *); |
424 | extern void scsi_target_block(struct device *); |
425 | extern void scsi_target_unblock(struct device *, enum scsi_device_state); |
426 | extern void scsi_remove_target(struct device *); |
427 | extern const char *scsi_device_state_name(enum scsi_device_state); |
428 | extern int scsi_is_sdev_device(const struct device *); |
429 | extern int scsi_is_target_device(const struct device *); |
430 | extern void scsi_sanitize_inquiry_string(unsigned char *s, int len); |
431 | extern int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, |
432 | int data_direction, void *buffer, unsigned bufflen, |
433 | unsigned char *sense, struct scsi_sense_hdr *sshdr, |
434 | int timeout, int retries, u64 flags, |
435 | req_flags_t rq_flags, int *resid); |
436 | /* Make sure any sense buffer is the correct size. */ |
437 | #define scsi_execute(sdev, cmd, data_direction, buffer, bufflen, sense, \ |
438 | sshdr, timeout, retries, flags, rq_flags, resid) \ |
439 | ({ \ |
440 | BUILD_BUG_ON((sense) != NULL && \ |
441 | sizeof(sense) != SCSI_SENSE_BUFFERSIZE); \ |
442 | __scsi_execute(sdev, cmd, data_direction, buffer, bufflen, \ |
443 | sense, sshdr, timeout, retries, flags, rq_flags, \ |
444 | resid); \ |
445 | }) |
446 | static inline int scsi_execute_req(struct scsi_device *sdev, |
447 | const unsigned char *cmd, int data_direction, void *buffer, |
448 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, |
449 | int retries, int *resid) |
450 | { |
451 | return scsi_execute(sdev, cmd, data_direction, buffer, |
452 | bufflen, NULL, sshdr, timeout, retries, 0, 0, resid); |
453 | } |
454 | extern void sdev_disable_disk_events(struct scsi_device *sdev); |
455 | extern void sdev_enable_disk_events(struct scsi_device *sdev); |
456 | extern int scsi_vpd_lun_id(struct scsi_device *, char *, size_t); |
457 | extern int scsi_vpd_tpg_id(struct scsi_device *, int *); |
458 | |
459 | #ifdef CONFIG_PM |
460 | extern int scsi_autopm_get_device(struct scsi_device *); |
461 | extern void scsi_autopm_put_device(struct scsi_device *); |
462 | #else |
463 | static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } |
464 | static inline void scsi_autopm_put_device(struct scsi_device *d) {} |
465 | #endif /* CONFIG_PM */ |
466 | |
467 | static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) |
468 | { |
469 | return device_reprobe(&sdev->sdev_gendev); |
470 | } |
471 | |
472 | static inline unsigned int sdev_channel(struct scsi_device *sdev) |
473 | { |
474 | return sdev->channel; |
475 | } |
476 | |
477 | static inline unsigned int sdev_id(struct scsi_device *sdev) |
478 | { |
479 | return sdev->id; |
480 | } |
481 | |
482 | #define scmd_id(scmd) sdev_id((scmd)->device) |
483 | #define scmd_channel(scmd) sdev_channel((scmd)->device) |
484 | |
485 | /* |
486 | * checks for positions of the SCSI state machine |
487 | */ |
488 | static inline int scsi_device_online(struct scsi_device *sdev) |
489 | { |
490 | return (sdev->sdev_state != SDEV_OFFLINE && |
491 | sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && |
492 | sdev->sdev_state != SDEV_DEL); |
493 | } |
494 | static inline int scsi_device_blocked(struct scsi_device *sdev) |
495 | { |
496 | return sdev->sdev_state == SDEV_BLOCK || |
497 | sdev->sdev_state == SDEV_CREATED_BLOCK; |
498 | } |
499 | static inline int scsi_device_created(struct scsi_device *sdev) |
500 | { |
501 | return sdev->sdev_state == SDEV_CREATED || |
502 | sdev->sdev_state == SDEV_CREATED_BLOCK; |
503 | } |
504 | |
505 | int scsi_internal_device_block_nowait(struct scsi_device *sdev); |
506 | int scsi_internal_device_unblock_nowait(struct scsi_device *sdev, |
507 | enum scsi_device_state new_state); |
508 | |
509 | /* accessor functions for the SCSI parameters */ |
510 | static inline int scsi_device_sync(struct scsi_device *sdev) |
511 | { |
512 | return sdev->sdtr; |
513 | } |
514 | static inline int scsi_device_wide(struct scsi_device *sdev) |
515 | { |
516 | return sdev->wdtr; |
517 | } |
518 | static inline int scsi_device_dt(struct scsi_device *sdev) |
519 | { |
520 | return sdev->ppr; |
521 | } |
522 | static inline int scsi_device_dt_only(struct scsi_device *sdev) |
523 | { |
524 | if (sdev->inquiry_len < 57) |
525 | return 0; |
526 | return (sdev->inquiry[56] & 0x0c) == 0x04; |
527 | } |
528 | static inline int scsi_device_ius(struct scsi_device *sdev) |
529 | { |
530 | if (sdev->inquiry_len < 57) |
531 | return 0; |
532 | return sdev->inquiry[56] & 0x01; |
533 | } |
534 | static inline int scsi_device_qas(struct scsi_device *sdev) |
535 | { |
536 | if (sdev->inquiry_len < 57) |
537 | return 0; |
538 | return sdev->inquiry[56] & 0x02; |
539 | } |
540 | static inline int scsi_device_enclosure(struct scsi_device *sdev) |
541 | { |
542 | return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; |
543 | } |
544 | |
545 | static inline int scsi_device_protection(struct scsi_device *sdev) |
546 | { |
547 | if (sdev->no_dif) |
548 | return 0; |
549 | |
550 | return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); |
551 | } |
552 | |
553 | static inline int scsi_device_tpgs(struct scsi_device *sdev) |
554 | { |
555 | return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; |
556 | } |
557 | |
558 | /** |
559 | * scsi_device_supports_vpd - test if a device supports VPD pages |
560 | * @sdev: the &struct scsi_device to test |
561 | * |
562 | * If the 'try_vpd_pages' flag is set it takes precedence. |
563 | * Otherwise we will assume VPD pages are supported if the |
564 | * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set. |
565 | */ |
566 | static inline int scsi_device_supports_vpd(struct scsi_device *sdev) |
567 | { |
568 | /* Attempt VPD inquiry if the device blacklist explicitly calls |
569 | * for it. |
570 | */ |
571 | if (sdev->try_vpd_pages) |
572 | return 1; |
573 | /* |
574 | * Although VPD inquiries can go to SCSI-2 type devices, |
575 | * some USB ones crash on receiving them, and the pages |
576 | * we currently ask for are mandatory for SPC-2 and beyond |
577 | */ |
578 | if (sdev->scsi_level >= SCSI_SPC_2 && !sdev->skip_vpd_pages) |
579 | return 1; |
580 | return 0; |
581 | } |
582 | |
583 | #define MODULE_ALIAS_SCSI_DEVICE(type) \ |
584 | MODULE_ALIAS("scsi:t-" __stringify(type) "*") |
585 | #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" |
586 | |
587 | #endif /* _SCSI_SCSI_DEVICE_H */ |
588 | |