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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _SCSI_SCSI_DEVICE_H |
3 | #define _SCSI_SCSI_DEVICE_H | |
4 | ||
1da177e4 LT |
5 | #include <linux/list.h> |
6 | #include <linux/spinlock.h> | |
ffedb452 | 7 | #include <linux/workqueue.h> |
a4d04a4c | 8 | #include <linux/blkdev.h> |
d211f052 | 9 | #include <scsi/scsi.h> |
60063497 | 10 | #include <linux/atomic.h> |
1da177e4 | 11 | |
313162d0 | 12 | struct device; |
1da177e4 LT |
13 | struct request_queue; |
14 | struct scsi_cmnd; | |
e10fb91c | 15 | struct scsi_lun; |
ea73a9f2 | 16 | struct scsi_sense_hdr; |
1da177e4 | 17 | |
5ebde469 HR |
18 | typedef unsigned int __bitwise blist_flags_t; |
19 | ||
1cf72699 JB |
20 | struct scsi_mode_data { |
21 | __u32 length; | |
22 | __u16 block_descriptor_length; | |
23 | __u8 medium_type; | |
24 | __u8 device_specific; | |
25 | __u8 header_length; | |
26 | __u8 longlba:1; | |
27 | }; | |
28 | ||
1da177e4 LT |
29 | /* |
30 | * sdev state: If you alter this, you also need to alter scsi_sysfs.c | |
31 | * (for the ascii descriptions) and the state model enforcer: | |
32 | * scsi_lib:scsi_device_set_state(). | |
33 | */ | |
34 | enum scsi_device_state { | |
35 | SDEV_CREATED = 1, /* device created but not added to sysfs | |
36 | * Only internal commands allowed (for inq) */ | |
37 | SDEV_RUNNING, /* device properly configured | |
38 | * All commands allowed */ | |
39 | SDEV_CANCEL, /* beginning to delete device | |
40 | * Only error handler commands allowed */ | |
41 | SDEV_DEL, /* device deleted | |
42 | * no commands allowed */ | |
43 | SDEV_QUIESCE, /* Device quiescent. No block commands | |
44 | * will be accepted, only specials (which | |
45 | * originate in the mid-layer) */ | |
46 | SDEV_OFFLINE, /* Device offlined (by error handling or | |
47 | * user request */ | |
1b8d2620 | 48 | SDEV_TRANSPORT_OFFLINE, /* Offlined by transport class error handler */ |
6f4267e3 JB |
49 | SDEV_BLOCK, /* Device blocked by scsi lld. No |
50 | * scsi commands from user or midlayer | |
51 | * should be issued to the scsi | |
52 | * lld. */ | |
53 | SDEV_CREATED_BLOCK, /* same as above but for created devices */ | |
1da177e4 LT |
54 | }; |
55 | ||
1d645088 HR |
56 | enum scsi_scan_mode { |
57 | SCSI_SCAN_INITIAL = 0, | |
58 | SCSI_SCAN_RESCAN, | |
59 | SCSI_SCAN_MANUAL, | |
60 | }; | |
61 | ||
a341cd0f JG |
62 | enum scsi_device_event { |
63 | SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */ | |
279afdfe EM |
64 | SDEV_EVT_INQUIRY_CHANGE_REPORTED, /* 3F 03 UA reported */ |
65 | SDEV_EVT_CAPACITY_CHANGE_REPORTED, /* 2A 09 UA reported */ | |
66 | SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED, /* 38 07 UA reported */ | |
67 | SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */ | |
68 | SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */ | |
14c3e677 | 69 | SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, /* 2A 06 UA reported */ |
cf3431bb | 70 | SDEV_EVT_POWER_ON_RESET_OCCURRED, /* 29 00 UA reported */ |
279afdfe EM |
71 | |
72 | SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE, | |
cf3431bb | 73 | SDEV_EVT_LAST = SDEV_EVT_POWER_ON_RESET_OCCURRED, |
a341cd0f | 74 | |
a341cd0f JG |
75 | SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1 |
76 | }; | |
77 | ||
78 | struct scsi_event { | |
79 | enum scsi_device_event evt_type; | |
80 | struct list_head node; | |
81 | ||
82 | /* put union of data structures, for non-simple event types, | |
83 | * here | |
84 | */ | |
85 | }; | |
86 | ||
ccf1e004 BVA |
87 | /** |
88 | * struct scsi_vpd - SCSI Vital Product Data | |
89 | * @rcu: For kfree_rcu(). | |
90 | * @len: Length in bytes of @data. | |
91 | * @data: VPD data as defined in various T10 SCSI standard documents. | |
92 | */ | |
93 | struct scsi_vpd { | |
94 | struct rcu_head rcu; | |
95 | int len; | |
96 | unsigned char data[]; | |
97 | }; | |
98 | ||
1da177e4 LT |
99 | struct scsi_device { |
100 | struct Scsi_Host *host; | |
101 | struct request_queue *request_queue; | |
102 | ||
103 | /* the next two are protected by the host->host_lock */ | |
104 | struct list_head siblings; /* list of all devices on this host */ | |
105 | struct list_head same_target_siblings; /* just the devices sharing same target id */ | |
106 | ||
71e75c97 | 107 | atomic_t device_busy; /* commands actually active on LLDD */ |
cd9070c9 CH |
108 | atomic_t device_blocked; /* Device returned QUEUE_FULL. */ |
109 | ||
1da177e4 LT |
110 | spinlock_t list_lock; |
111 | struct list_head cmd_list; /* queue of in use SCSI Command structures */ | |
112 | struct list_head starved_entry; | |
1da177e4 | 113 | unsigned short queue_depth; /* How deep of a queue we want */ |
4a84067d | 114 | unsigned short max_queue_depth; /* max queue depth */ |
1da177e4 LT |
115 | unsigned short last_queue_full_depth; /* These two are used by */ |
116 | unsigned short last_queue_full_count; /* scsi_track_queue_full() */ | |
4a84067d VD |
117 | unsigned long last_queue_full_time; /* last queue full time */ |
118 | unsigned long queue_ramp_up_period; /* ramp up period in jiffies */ | |
119 | #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ) | |
120 | ||
121 | unsigned long last_queue_ramp_up; /* last queue ramp up time */ | |
1da177e4 | 122 | |
9cb78c16 HR |
123 | unsigned int id, channel; |
124 | u64 lun; | |
1da177e4 LT |
125 | unsigned int manufacturer; /* Manufacturer of device, for using |
126 | * vendor-specific cmd's */ | |
127 | unsigned sector_size; /* size in bytes */ | |
128 | ||
129 | void *hostdata; /* available to low-level driver */ | |
c2e872a2 | 130 | unsigned char type; |
1da177e4 LT |
131 | char scsi_level; |
132 | char inq_periph_qual; /* PQ from INQUIRY data */ | |
09e2b0b1 | 133 | struct mutex inquiry_mutex; |
1da177e4 LT |
134 | unsigned char inquiry_len; /* valid bytes in 'inquiry' */ |
135 | unsigned char * inquiry; /* INQUIRY response data */ | |
7f23e146 JB |
136 | const char * vendor; /* [back_compat] point into 'inquiry' ... */ |
137 | const char * model; /* ... after scan; point to static string */ | |
138 | const char * rev; /* ... "nullnullnullnull" before scan */ | |
b3ae8780 HR |
139 | |
140 | #define SCSI_VPD_PG_LEN 255 | |
ccf1e004 BVA |
141 | struct scsi_vpd __rcu *vpd_pg83; |
142 | struct scsi_vpd __rcu *vpd_pg80; | |
1da177e4 LT |
143 | unsigned char current_tag; /* current tag */ |
144 | struct scsi_target *sdev_target; /* used only for single_lun */ | |
145 | ||
5ebde469 | 146 | blist_flags_t sdev_bflags; /* black/white flags as also found in |
1da177e4 LT |
147 | * scsi_devinfo.[hc]. For now used only to |
148 | * pass settings from slave_alloc to scsi | |
149 | * core. */ | |
0816c925 | 150 | unsigned int eh_timeout; /* Error handling timeout */ |
1da177e4 LT |
151 | unsigned removable:1; |
152 | unsigned changed:1; /* Data invalid due to media change */ | |
153 | unsigned busy:1; /* Used to prevent races */ | |
154 | unsigned lockable:1; /* Able to prevent media removal */ | |
155 | unsigned locked:1; /* Media removal disabled */ | |
156 | unsigned borken:1; /* Tell the Seagate driver to be | |
157 | * painfully slow on this device */ | |
158 | unsigned disconnect:1; /* can disconnect */ | |
159 | unsigned soft_reset:1; /* Uses soft reset option */ | |
160 | unsigned sdtr:1; /* Device supports SDTR messages */ | |
161 | unsigned wdtr:1; /* Device supports WDTR messages */ | |
162 | unsigned ppr:1; /* Device supports PPR messages */ | |
163 | unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ | |
164 | unsigned simple_tags:1; /* simple queue tag messages are enabled */ | |
1da177e4 LT |
165 | unsigned was_reset:1; /* There was a bus reset on the bus for |
166 | * this device */ | |
167 | unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN | |
168 | * because we did a bus reset. */ | |
169 | unsigned use_10_for_rw:1; /* first try 10-byte read / write */ | |
170 | unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ | |
3c6bdaea | 171 | unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ |
5db44863 | 172 | unsigned no_write_same:1; /* no WRITE SAME command */ |
53ad570b | 173 | unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ |
1da177e4 LT |
174 | unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ |
175 | unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ | |
09b6b51b | 176 | unsigned skip_vpd_pages:1; /* do not read VPD pages */ |
c1d40a52 | 177 | unsigned try_vpd_pages:1; /* attempt to read VPD pages */ |
1da177e4 LT |
178 | unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ |
179 | unsigned no_start_on_add:1; /* do not issue start on add */ | |
180 | unsigned allow_restart:1; /* issue START_UNIT in error handler */ | |
c3c94c5a | 181 | unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ |
d2886ea3 | 182 | unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ |
1da177e4 LT |
183 | unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ |
184 | unsigned select_no_atn:1; | |
185 | unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ | |
61bf54b7 | 186 | unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ |
1da177e4 | 187 | unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ |
18351070 LT |
188 | unsigned last_sector_bug:1; /* do not use multisector accesses on |
189 | SD_LAST_BUGGY_SECTORS */ | |
8e04d805 | 190 | unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */ |
5ce524bd | 191 | unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */ |
6a0bdffa | 192 | unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */ |
d80210f2 | 193 | unsigned security_supported:1; /* Supports Security Protocols */ |
860dc736 | 194 | unsigned is_visible:1; /* is the device visible in sysfs */ |
b81478d8 | 195 | unsigned wce_default_on:1; /* Cache is ON by default */ |
d974e426 | 196 | unsigned no_dif:1; /* T10 PI (DIF) should be disabled */ |
b14bf2d0 | 197 | unsigned broken_fua:1; /* Don't set FUA bit */ |
50c4e964 | 198 | unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */ |
28a0bc41 | 199 | unsigned unmap_limit_for_ws:1; /* Use the UNMAP limit for WRITE SAME */ |
1da177e4 | 200 | |
6f4c827e AL |
201 | atomic_t disk_events_disable_depth; /* disable depth for disk events */ |
202 | ||
a341cd0f | 203 | DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ |
279afdfe | 204 | DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */ |
a341cd0f JG |
205 | struct list_head event_list; /* asserted events */ |
206 | struct work_struct event_work; | |
207 | ||
1da177e4 LT |
208 | unsigned int max_device_blocked; /* what device_blocked counts down from */ |
209 | #define SCSI_DEFAULT_DEVICE_BLOCKED 3 | |
210 | ||
211 | atomic_t iorequest_cnt; | |
212 | atomic_t iodone_cnt; | |
213 | atomic_t ioerr_cnt; | |
214 | ||
ee959b00 TJ |
215 | struct device sdev_gendev, |
216 | sdev_dev; | |
1da177e4 | 217 | |
ffedb452 | 218 | struct execute_work ew; /* used to get process context on put */ |
9937a5e2 | 219 | struct work_struct requeue_work; |
ffedb452 | 220 | |
ee14c674 CH |
221 | struct scsi_device_handler *handler; |
222 | void *handler_data; | |
223 | ||
77c9df96 | 224 | unsigned char access_state; |
0db6ca8a | 225 | struct mutex state_mutex; |
1da177e4 | 226 | enum scsi_device_state sdev_state; |
3a0a5299 | 227 | struct task_struct *quiesced_by; |
1da177e4 LT |
228 | unsigned long sdev_data[0]; |
229 | } __attribute__((aligned(sizeof(unsigned long)))); | |
a6a8d9f8 | 230 | |
1da177e4 LT |
231 | #define to_scsi_device(d) \ |
232 | container_of(d, struct scsi_device, sdev_gendev) | |
233 | #define class_to_sdev(d) \ | |
ee959b00 | 234 | container_of(d, struct scsi_device, sdev_dev) |
1da177e4 | 235 | #define transport_class_to_sdev(class_dev) \ |
ee959b00 | 236 | to_scsi_device(class_dev->parent) |
1da177e4 | 237 | |
3af74a3c DW |
238 | #define sdev_dbg(sdev, fmt, a...) \ |
239 | dev_dbg(&(sdev)->sdev_gendev, fmt, ##a) | |
240 | ||
22e0d994 HR |
241 | /* |
242 | * like scmd_printk, but the device name is passed in | |
243 | * as a string pointer | |
244 | */ | |
9c4a6b1e | 245 | __printf(4, 5) void |
6a806cbc CH |
246 | sdev_prefix_printk(const char *, const struct scsi_device *, const char *, |
247 | const char *, ...); | |
ded85c19 HR |
248 | |
249 | #define sdev_printk(l, sdev, fmt, a...) \ | |
250 | sdev_prefix_printk(l, sdev, NULL, fmt, ##a) | |
251 | ||
9c4a6b1e | 252 | __printf(3, 4) void |
6a806cbc | 253 | scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...); |
01d7b3b8 | 254 | |
3af74a3c DW |
255 | #define scmd_dbg(scmd, fmt, a...) \ |
256 | do { \ | |
257 | if ((scmd)->request->rq_disk) \ | |
258 | sdev_dbg((scmd)->device, "[%s] " fmt, \ | |
259 | (scmd)->request->rq_disk->disk_name, ##a);\ | |
260 | else \ | |
261 | sdev_dbg((scmd)->device, fmt, ##a); \ | |
262 | } while (0) | |
263 | ||
ffedb452 | 264 | enum scsi_target_state { |
643eb2d9 JB |
265 | STARGET_CREATED = 1, |
266 | STARGET_RUNNING, | |
f05795d3 | 267 | STARGET_REMOVE, |
f9279c96 | 268 | STARGET_CREATED_REMOVE, |
ffedb452 JB |
269 | STARGET_DEL, |
270 | }; | |
271 | ||
1da177e4 LT |
272 | /* |
273 | * scsi_target: representation of a scsi target, for now, this is only | |
274 | * used for single_lun devices. If no one has active IO to the target, | |
275 | * starget_sdev_user is NULL, else it points to the active sdev. | |
276 | */ | |
277 | struct scsi_target { | |
278 | struct scsi_device *starget_sdev_user; | |
279 | struct list_head siblings; | |
280 | struct list_head devices; | |
281 | struct device dev; | |
e63ed0d7 | 282 | struct kref reap_ref; /* last put renders target invisible */ |
1da177e4 LT |
283 | unsigned int channel; |
284 | unsigned int id; /* target id ... replace | |
285 | * scsi_device.id eventually */ | |
1bfc5d9d | 286 | unsigned int create:1; /* signal that it needs to be added */ |
25d7c363 TB |
287 | unsigned int single_lun:1; /* Indicates we should only |
288 | * allow I/O to one of the luns | |
289 | * for the device at a time. */ | |
de8c46bf AS |
290 | unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f |
291 | * means no lun present. */ | |
09b6b51b AS |
292 | unsigned int no_report_luns:1; /* Don't use |
293 | * REPORT LUNS for scanning. */ | |
279afdfe EM |
294 | unsigned int expecting_lun_change:1; /* A device has reported |
295 | * a 3F/0E UA, other devices on | |
296 | * the same target will also. */ | |
7ae65c0f CH |
297 | /* commands actually active on LLD. */ |
298 | atomic_t target_busy; | |
cd9070c9 CH |
299 | atomic_t target_blocked; |
300 | ||
f0c0a376 MC |
301 | /* |
302 | * LLDs should set this in the slave_alloc host template callout. | |
303 | * If set to zero then there is not limit. | |
304 | */ | |
305 | unsigned int can_queue; | |
f0c0a376 MC |
306 | unsigned int max_target_blocked; |
307 | #define SCSI_DEFAULT_TARGET_BLOCKED 3 | |
1bfc5d9d | 308 | |
6f3a2024 | 309 | char scsi_level; |
ffedb452 | 310 | enum scsi_target_state state; |
a283bd37 JB |
311 | void *hostdata; /* available to low-level driver */ |
312 | unsigned long starget_data[0]; /* for the transport */ | |
313 | /* starget_data must be the last element!!!! */ | |
1da177e4 LT |
314 | } __attribute__((aligned(sizeof(unsigned long)))); |
315 | ||
316 | #define to_scsi_target(d) container_of(d, struct scsi_target, dev) | |
317 | static inline struct scsi_target *scsi_target(struct scsi_device *sdev) | |
318 | { | |
319 | return to_scsi_target(sdev->sdev_gendev.parent); | |
320 | } | |
321 | #define transport_class_to_starget(class_dev) \ | |
ee959b00 | 322 | to_scsi_target(class_dev->parent) |
1da177e4 | 323 | |
9ccfc756 JB |
324 | #define starget_printk(prefix, starget, fmt, a...) \ |
325 | dev_printk(prefix, &(starget)->dev, fmt, ##a) | |
326 | ||
1da177e4 | 327 | extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, |
9cb78c16 | 328 | uint, uint, u64, void *hostdata); |
146f7262 | 329 | extern int scsi_add_device(struct Scsi_Host *host, uint channel, |
9cb78c16 | 330 | uint target, u64 lun); |
a6a8d9f8 | 331 | extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); |
1da177e4 | 332 | extern void scsi_remove_device(struct scsi_device *); |
a6a8d9f8 | 333 | extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); |
b3ae8780 | 334 | void scsi_attach_vpd(struct scsi_device *sdev); |
1da177e4 | 335 | |
857de6e0 | 336 | extern struct scsi_device *scsi_device_from_queue(struct request_queue *q); |
ed12e031 | 337 | extern int __must_check scsi_device_get(struct scsi_device *); |
1da177e4 LT |
338 | extern void scsi_device_put(struct scsi_device *); |
339 | extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, | |
9cb78c16 | 340 | uint, uint, u64); |
1da177e4 | 341 | extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, |
9cb78c16 | 342 | uint, uint, u64); |
1da177e4 | 343 | extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, |
9cb78c16 | 344 | u64); |
1da177e4 | 345 | extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, |
9cb78c16 | 346 | u64); |
1da177e4 LT |
347 | extern void starget_for_each_device(struct scsi_target *, void *, |
348 | void (*fn)(struct scsi_device *, void *)); | |
522939d4 MR |
349 | extern void __starget_for_each_device(struct scsi_target *, void *, |
350 | void (*fn)(struct scsi_device *, | |
351 | void *)); | |
1da177e4 LT |
352 | |
353 | /* only exposed to implement shost_for_each_device */ | |
354 | extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, | |
355 | struct scsi_device *); | |
356 | ||
357 | /** | |
3e082a91 MW |
358 | * shost_for_each_device - iterate over all devices of a host |
359 | * @sdev: the &struct scsi_device to use as a cursor | |
360 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 361 | * |
3e082a91 MW |
362 | * Iterator that returns each device attached to @shost. This loop |
363 | * takes a reference on each device and releases it at the end. If | |
364 | * you break out of the loop, you must call scsi_device_put(sdev). | |
1da177e4 LT |
365 | */ |
366 | #define shost_for_each_device(sdev, shost) \ | |
367 | for ((sdev) = __scsi_iterate_devices((shost), NULL); \ | |
368 | (sdev); \ | |
369 | (sdev) = __scsi_iterate_devices((shost), (sdev))) | |
370 | ||
371 | /** | |
3e082a91 MW |
372 | * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) |
373 | * @sdev: the &struct scsi_device to use as a cursor | |
374 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 375 | * |
3e082a91 MW |
376 | * Iterator that returns each device attached to @shost. It does _not_ |
377 | * take a reference on the scsi_device, so the whole loop must be | |
378 | * protected by shost->host_lock. | |
1da177e4 | 379 | * |
3e082a91 MW |
380 | * Note: The only reason to use this is because you need to access the |
381 | * device list in interrupt context. Otherwise you really want to use | |
382 | * shost_for_each_device instead. | |
1da177e4 LT |
383 | */ |
384 | #define __shost_for_each_device(sdev, shost) \ | |
385 | list_for_each_entry((sdev), &((shost)->__devices), siblings) | |
386 | ||
db5ed4df | 387 | extern int scsi_change_queue_depth(struct scsi_device *, int); |
1da177e4 LT |
388 | extern int scsi_track_queue_full(struct scsi_device *, int); |
389 | ||
390 | extern int scsi_set_medium_removal(struct scsi_device *, char); | |
391 | ||
392 | extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, | |
393 | unsigned char *buffer, int len, int timeout, | |
1cf72699 | 394 | int retries, struct scsi_mode_data *data, |
ea73a9f2 | 395 | struct scsi_sense_hdr *); |
5baba830 JB |
396 | extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, |
397 | int modepage, unsigned char *buffer, int len, | |
398 | int timeout, int retries, | |
399 | struct scsi_mode_data *data, | |
400 | struct scsi_sense_hdr *); | |
1da177e4 | 401 | extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, |
001aac25 | 402 | int retries, struct scsi_sense_hdr *sshdr); |
e3deec09 JB |
403 | extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, |
404 | int buf_len); | |
3c6bdaea MP |
405 | extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, |
406 | unsigned int len, unsigned char opcode); | |
1da177e4 LT |
407 | extern int scsi_device_set_state(struct scsi_device *sdev, |
408 | enum scsi_device_state state); | |
a341cd0f JG |
409 | extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, |
410 | gfp_t gfpflags); | |
411 | extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); | |
412 | extern void sdev_evt_send_simple(struct scsi_device *sdev, | |
413 | enum scsi_device_event evt_type, gfp_t gfpflags); | |
1da177e4 LT |
414 | extern int scsi_device_quiesce(struct scsi_device *sdev); |
415 | extern void scsi_device_resume(struct scsi_device *sdev); | |
416 | extern void scsi_target_quiesce(struct scsi_target *); | |
417 | extern void scsi_target_resume(struct scsi_target *); | |
418 | extern void scsi_scan_target(struct device *parent, unsigned int channel, | |
1d645088 HR |
419 | unsigned int id, u64 lun, |
420 | enum scsi_scan_mode rescan); | |
1da177e4 LT |
421 | extern void scsi_target_reap(struct scsi_target *); |
422 | extern void scsi_target_block(struct device *); | |
5d9fb5cc | 423 | extern void scsi_target_unblock(struct device *, enum scsi_device_state); |
1da177e4 LT |
424 | extern void scsi_remove_target(struct device *); |
425 | extern const char *scsi_device_state_name(enum scsi_device_state); | |
426 | extern int scsi_is_sdev_device(const struct device *); | |
427 | extern int scsi_is_target_device(const struct device *); | |
3846470a | 428 | extern void scsi_sanitize_inquiry_string(unsigned char *s, int len); |
33aa687d JB |
429 | extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, |
430 | int data_direction, void *buffer, unsigned bufflen, | |
76aaf87b CH |
431 | unsigned char *sense, struct scsi_sense_hdr *sshdr, |
432 | int timeout, int retries, u64 flags, | |
433 | req_flags_t rq_flags, int *resid); | |
9b21493c LM |
434 | static inline int scsi_execute_req(struct scsi_device *sdev, |
435 | const unsigned char *cmd, int data_direction, void *buffer, | |
436 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, | |
437 | int retries, int *resid) | |
438 | { | |
fcbfffe2 CH |
439 | return scsi_execute(sdev, cmd, data_direction, buffer, |
440 | bufflen, NULL, sshdr, timeout, retries, 0, 0, resid); | |
9b21493c | 441 | } |
6f4c827e AL |
442 | extern void sdev_disable_disk_events(struct scsi_device *sdev); |
443 | extern void sdev_enable_disk_events(struct scsi_device *sdev); | |
9983bed3 | 444 | extern int scsi_vpd_lun_id(struct scsi_device *, char *, size_t); |
a8aa3978 | 445 | extern int scsi_vpd_tpg_id(struct scsi_device *, int *); |
33aa687d | 446 | |
4f7ad521 | 447 | #ifdef CONFIG_PM |
bc4f2401 AS |
448 | extern int scsi_autopm_get_device(struct scsi_device *); |
449 | extern void scsi_autopm_put_device(struct scsi_device *); | |
450 | #else | |
451 | static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } | |
452 | static inline void scsi_autopm_put_device(struct scsi_device *d) {} | |
4f7ad521 | 453 | #endif /* CONFIG_PM */ |
bc4f2401 | 454 | |
cb5d9e09 | 455 | static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) |
e28482c5 | 456 | { |
cb5d9e09 | 457 | return device_reprobe(&sdev->sdev_gendev); |
e28482c5 JB |
458 | } |
459 | ||
01d7b3b8 JG |
460 | static inline unsigned int sdev_channel(struct scsi_device *sdev) |
461 | { | |
462 | return sdev->channel; | |
463 | } | |
464 | ||
465 | static inline unsigned int sdev_id(struct scsi_device *sdev) | |
466 | { | |
467 | return sdev->id; | |
468 | } | |
469 | ||
470 | #define scmd_id(scmd) sdev_id((scmd)->device) | |
471 | #define scmd_channel(scmd) sdev_channel((scmd)->device) | |
472 | ||
0f1d87a2 JB |
473 | /* |
474 | * checks for positions of the SCSI state machine | |
475 | */ | |
1da177e4 LT |
476 | static inline int scsi_device_online(struct scsi_device *sdev) |
477 | { | |
0762a482 | 478 | return (sdev->sdev_state != SDEV_OFFLINE && |
1b8d2620 | 479 | sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && |
0762a482 | 480 | sdev->sdev_state != SDEV_DEL); |
1da177e4 | 481 | } |
0f1d87a2 JB |
482 | static inline int scsi_device_blocked(struct scsi_device *sdev) |
483 | { | |
6f4267e3 JB |
484 | return sdev->sdev_state == SDEV_BLOCK || |
485 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 JB |
486 | } |
487 | static inline int scsi_device_created(struct scsi_device *sdev) | |
488 | { | |
6f4267e3 JB |
489 | return sdev->sdev_state == SDEV_CREATED || |
490 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 | 491 | } |
1da177e4 | 492 | |
551eb598 | 493 | int scsi_internal_device_block_nowait(struct scsi_device *sdev); |
43f7571b BVA |
494 | int scsi_internal_device_unblock_nowait(struct scsi_device *sdev, |
495 | enum scsi_device_state new_state); | |
8893cf6c | 496 | |
1da177e4 LT |
497 | /* accessor functions for the SCSI parameters */ |
498 | static inline int scsi_device_sync(struct scsi_device *sdev) | |
499 | { | |
500 | return sdev->sdtr; | |
501 | } | |
502 | static inline int scsi_device_wide(struct scsi_device *sdev) | |
503 | { | |
504 | return sdev->wdtr; | |
505 | } | |
506 | static inline int scsi_device_dt(struct scsi_device *sdev) | |
507 | { | |
508 | return sdev->ppr; | |
509 | } | |
510 | static inline int scsi_device_dt_only(struct scsi_device *sdev) | |
511 | { | |
512 | if (sdev->inquiry_len < 57) | |
513 | return 0; | |
514 | return (sdev->inquiry[56] & 0x0c) == 0x04; | |
515 | } | |
516 | static inline int scsi_device_ius(struct scsi_device *sdev) | |
517 | { | |
518 | if (sdev->inquiry_len < 57) | |
519 | return 0; | |
520 | return sdev->inquiry[56] & 0x01; | |
521 | } | |
522 | static inline int scsi_device_qas(struct scsi_device *sdev) | |
523 | { | |
524 | if (sdev->inquiry_len < 57) | |
525 | return 0; | |
526 | return sdev->inquiry[56] & 0x02; | |
527 | } | |
b30c2fc1 JB |
528 | static inline int scsi_device_enclosure(struct scsi_device *sdev) |
529 | { | |
d1e12de8 | 530 | return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; |
b30c2fc1 | 531 | } |
d7b8bcb0 | 532 | |
7027ad72 MP |
533 | static inline int scsi_device_protection(struct scsi_device *sdev) |
534 | { | |
d974e426 MP |
535 | if (sdev->no_dif) |
536 | return 0; | |
537 | ||
d211f052 | 538 | return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); |
7027ad72 MP |
539 | } |
540 | ||
d7c48feb HR |
541 | static inline int scsi_device_tpgs(struct scsi_device *sdev) |
542 | { | |
543 | return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; | |
544 | } | |
545 | ||
5ddfe085 HR |
546 | /** |
547 | * scsi_device_supports_vpd - test if a device supports VPD pages | |
548 | * @sdev: the &struct scsi_device to test | |
549 | * | |
550 | * If the 'try_vpd_pages' flag is set it takes precedence. | |
551 | * Otherwise we will assume VPD pages are supported if the | |
552 | * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set. | |
553 | */ | |
554 | static inline int scsi_device_supports_vpd(struct scsi_device *sdev) | |
555 | { | |
556 | /* Attempt VPD inquiry if the device blacklist explicitly calls | |
557 | * for it. | |
558 | */ | |
559 | if (sdev->try_vpd_pages) | |
560 | return 1; | |
561 | /* | |
562 | * Although VPD inquiries can go to SCSI-2 type devices, | |
563 | * some USB ones crash on receiving them, and the pages | |
e4c36ad7 | 564 | * we currently ask for are mandatory for SPC-2 and beyond |
5ddfe085 | 565 | */ |
e4c36ad7 | 566 | if (sdev->scsi_level >= SCSI_SPC_2 && !sdev->skip_vpd_pages) |
5ddfe085 HR |
567 | return 1; |
568 | return 0; | |
569 | } | |
570 | ||
d7b8bcb0 MT |
571 | #define MODULE_ALIAS_SCSI_DEVICE(type) \ |
572 | MODULE_ALIAS("scsi:t-" __stringify(type) "*") | |
573 | #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" | |
574 | ||
1da177e4 | 575 | #endif /* _SCSI_SCSI_DEVICE_H */ |