Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _SCSI_SCSI_DEVICE_H |
2 | #define _SCSI_SCSI_DEVICE_H | |
3 | ||
1da177e4 LT |
4 | #include <linux/list.h> |
5 | #include <linux/spinlock.h> | |
ffedb452 | 6 | #include <linux/workqueue.h> |
a4d04a4c | 7 | #include <linux/blkdev.h> |
d211f052 | 8 | #include <scsi/scsi.h> |
60063497 | 9 | #include <linux/atomic.h> |
1da177e4 | 10 | |
313162d0 | 11 | struct device; |
1da177e4 LT |
12 | struct request_queue; |
13 | struct scsi_cmnd; | |
e10fb91c | 14 | struct scsi_lun; |
ea73a9f2 | 15 | struct scsi_sense_hdr; |
1da177e4 | 16 | |
1cf72699 JB |
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 | ||
1da177e4 LT |
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 */ | |
1b8d2620 | 45 | SDEV_TRANSPORT_OFFLINE, /* Offlined by transport class error handler */ |
6f4267e3 JB |
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 */ | |
1da177e4 LT |
51 | }; |
52 | ||
a341cd0f JG |
53 | enum scsi_device_event { |
54 | SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */ | |
279afdfe EM |
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, | |
a341cd0f | 63 | |
a341cd0f JG |
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 | ||
1da177e4 LT |
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 | ||
71e75c97 | 84 | atomic_t device_busy; /* commands actually active on LLDD */ |
cd9070c9 CH |
85 | atomic_t device_blocked; /* Device returned QUEUE_FULL. */ |
86 | ||
1da177e4 LT |
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 */ | |
4a84067d | 92 | unsigned short max_queue_depth; /* max queue depth */ |
1da177e4 LT |
93 | unsigned short last_queue_full_depth; /* These two are used by */ |
94 | unsigned short last_queue_full_count; /* scsi_track_queue_full() */ | |
4a84067d VD |
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 */ | |
1da177e4 | 100 | |
9cb78c16 HR |
101 | unsigned int id, channel; |
102 | u64 lun; | |
1da177e4 LT |
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 */ | |
1da177e4 LT |
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 */ | |
7f23e146 JB |
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 */ | |
b3ae8780 HR |
116 | |
117 | #define SCSI_VPD_PG_LEN 255 | |
118 | int vpd_pg83_len; | |
119 | unsigned char *vpd_pg83; | |
120 | int vpd_pg80_len; | |
121 | unsigned char *vpd_pg80; | |
1da177e4 LT |
122 | unsigned char current_tag; /* current tag */ |
123 | struct scsi_target *sdev_target; /* used only for single_lun */ | |
124 | ||
125 | unsigned int sdev_bflags; /* black/white flags as also found in | |
126 | * scsi_devinfo.[hc]. For now used only to | |
127 | * pass settings from slave_alloc to scsi | |
128 | * core. */ | |
0816c925 | 129 | unsigned int eh_timeout; /* Error handling timeout */ |
1da177e4 LT |
130 | unsigned removable:1; |
131 | unsigned changed:1; /* Data invalid due to media change */ | |
132 | unsigned busy:1; /* Used to prevent races */ | |
133 | unsigned lockable:1; /* Able to prevent media removal */ | |
134 | unsigned locked:1; /* Media removal disabled */ | |
135 | unsigned borken:1; /* Tell the Seagate driver to be | |
136 | * painfully slow on this device */ | |
137 | unsigned disconnect:1; /* can disconnect */ | |
138 | unsigned soft_reset:1; /* Uses soft reset option */ | |
139 | unsigned sdtr:1; /* Device supports SDTR messages */ | |
140 | unsigned wdtr:1; /* Device supports WDTR messages */ | |
141 | unsigned ppr:1; /* Device supports PPR messages */ | |
142 | unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ | |
143 | unsigned simple_tags:1; /* simple queue tag messages are enabled */ | |
1da177e4 LT |
144 | unsigned was_reset:1; /* There was a bus reset on the bus for |
145 | * this device */ | |
146 | unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN | |
147 | * because we did a bus reset. */ | |
148 | unsigned use_10_for_rw:1; /* first try 10-byte read / write */ | |
149 | unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ | |
3c6bdaea | 150 | unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ |
5db44863 | 151 | unsigned no_write_same:1; /* no WRITE SAME command */ |
53ad570b | 152 | unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ |
1da177e4 LT |
153 | unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ |
154 | unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ | |
09b6b51b | 155 | unsigned skip_vpd_pages:1; /* do not read VPD pages */ |
c1d40a52 | 156 | unsigned try_vpd_pages:1; /* attempt to read VPD pages */ |
1da177e4 LT |
157 | unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ |
158 | unsigned no_start_on_add:1; /* do not issue start on add */ | |
159 | unsigned allow_restart:1; /* issue START_UNIT in error handler */ | |
c3c94c5a | 160 | unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ |
d2886ea3 | 161 | unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ |
1da177e4 LT |
162 | unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ |
163 | unsigned select_no_atn:1; | |
164 | unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ | |
61bf54b7 | 165 | unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ |
1da177e4 | 166 | unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ |
18351070 LT |
167 | unsigned last_sector_bug:1; /* do not use multisector accesses on |
168 | SD_LAST_BUGGY_SECTORS */ | |
8e04d805 | 169 | unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */ |
5ce524bd | 170 | unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */ |
6a0bdffa | 171 | unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */ |
860dc736 | 172 | unsigned is_visible:1; /* is the device visible in sysfs */ |
b81478d8 | 173 | unsigned wce_default_on:1; /* Cache is ON by default */ |
d974e426 | 174 | unsigned no_dif:1; /* T10 PI (DIF) should be disabled */ |
b14bf2d0 | 175 | unsigned broken_fua:1; /* Don't set FUA bit */ |
50c4e964 | 176 | unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */ |
1da177e4 | 177 | |
6f4c827e AL |
178 | atomic_t disk_events_disable_depth; /* disable depth for disk events */ |
179 | ||
a341cd0f | 180 | DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ |
279afdfe | 181 | DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */ |
a341cd0f JG |
182 | struct list_head event_list; /* asserted events */ |
183 | struct work_struct event_work; | |
184 | ||
1da177e4 LT |
185 | unsigned int max_device_blocked; /* what device_blocked counts down from */ |
186 | #define SCSI_DEFAULT_DEVICE_BLOCKED 3 | |
187 | ||
188 | atomic_t iorequest_cnt; | |
189 | atomic_t iodone_cnt; | |
190 | atomic_t ioerr_cnt; | |
191 | ||
ee959b00 TJ |
192 | struct device sdev_gendev, |
193 | sdev_dev; | |
1da177e4 | 194 | |
ffedb452 | 195 | struct execute_work ew; /* used to get process context on put */ |
9937a5e2 | 196 | struct work_struct requeue_work; |
ffedb452 | 197 | |
a6a8d9f8 | 198 | struct scsi_dh_data *scsi_dh_data; |
1da177e4 LT |
199 | enum scsi_device_state sdev_state; |
200 | unsigned long sdev_data[0]; | |
201 | } __attribute__((aligned(sizeof(unsigned long)))); | |
a6a8d9f8 | 202 | |
3ae31f6a | 203 | typedef void (*activate_complete)(void *, int); |
a6a8d9f8 CS |
204 | struct scsi_device_handler { |
205 | /* Used by the infrastructure */ | |
206 | struct list_head list; /* list of scsi_device_handlers */ | |
a6a8d9f8 CS |
207 | |
208 | /* Filled by the hardware handler */ | |
209 | struct module *module; | |
210 | const char *name; | |
211 | int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *); | |
1d520328 | 212 | struct scsi_dh_data *(*attach)(struct scsi_device *); |
765cbc6d | 213 | void (*detach)(struct scsi_device *); |
3ae31f6a | 214 | int (*activate)(struct scsi_device *, activate_complete, void *); |
a6a8d9f8 | 215 | int (*prep_fn)(struct scsi_device *, struct request *); |
18ee70c9 | 216 | int (*set_params)(struct scsi_device *, const char *); |
6c3633d0 | 217 | bool (*match)(struct scsi_device *); |
a6a8d9f8 CS |
218 | }; |
219 | ||
220 | struct scsi_dh_data { | |
221 | struct scsi_device_handler *scsi_dh; | |
6c10db72 CS |
222 | struct scsi_device *sdev; |
223 | struct kref kref; | |
a6a8d9f8 CS |
224 | }; |
225 | ||
1da177e4 LT |
226 | #define to_scsi_device(d) \ |
227 | container_of(d, struct scsi_device, sdev_gendev) | |
228 | #define class_to_sdev(d) \ | |
ee959b00 | 229 | container_of(d, struct scsi_device, sdev_dev) |
1da177e4 | 230 | #define transport_class_to_sdev(class_dev) \ |
ee959b00 | 231 | to_scsi_device(class_dev->parent) |
1da177e4 | 232 | |
3af74a3c DW |
233 | #define sdev_dbg(sdev, fmt, a...) \ |
234 | dev_dbg(&(sdev)->sdev_gendev, fmt, ##a) | |
235 | ||
22e0d994 HR |
236 | /* |
237 | * like scmd_printk, but the device name is passed in | |
238 | * as a string pointer | |
239 | */ | |
9c4a6b1e | 240 | __printf(4, 5) void |
6a806cbc CH |
241 | sdev_prefix_printk(const char *, const struct scsi_device *, const char *, |
242 | const char *, ...); | |
ded85c19 HR |
243 | |
244 | #define sdev_printk(l, sdev, fmt, a...) \ | |
245 | sdev_prefix_printk(l, sdev, NULL, fmt, ##a) | |
246 | ||
9c4a6b1e | 247 | __printf(3, 4) void |
6a806cbc | 248 | scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...); |
01d7b3b8 | 249 | |
3af74a3c DW |
250 | #define scmd_dbg(scmd, fmt, a...) \ |
251 | do { \ | |
252 | if ((scmd)->request->rq_disk) \ | |
253 | sdev_dbg((scmd)->device, "[%s] " fmt, \ | |
254 | (scmd)->request->rq_disk->disk_name, ##a);\ | |
255 | else \ | |
256 | sdev_dbg((scmd)->device, fmt, ##a); \ | |
257 | } while (0) | |
258 | ||
ffedb452 | 259 | enum scsi_target_state { |
643eb2d9 JB |
260 | STARGET_CREATED = 1, |
261 | STARGET_RUNNING, | |
ffedb452 JB |
262 | STARGET_DEL, |
263 | }; | |
264 | ||
1da177e4 LT |
265 | /* |
266 | * scsi_target: representation of a scsi target, for now, this is only | |
267 | * used for single_lun devices. If no one has active IO to the target, | |
268 | * starget_sdev_user is NULL, else it points to the active sdev. | |
269 | */ | |
270 | struct scsi_target { | |
271 | struct scsi_device *starget_sdev_user; | |
272 | struct list_head siblings; | |
273 | struct list_head devices; | |
274 | struct device dev; | |
e63ed0d7 | 275 | struct kref reap_ref; /* last put renders target invisible */ |
1da177e4 LT |
276 | unsigned int channel; |
277 | unsigned int id; /* target id ... replace | |
278 | * scsi_device.id eventually */ | |
1bfc5d9d | 279 | unsigned int create:1; /* signal that it needs to be added */ |
25d7c363 TB |
280 | unsigned int single_lun:1; /* Indicates we should only |
281 | * allow I/O to one of the luns | |
282 | * for the device at a time. */ | |
de8c46bf AS |
283 | unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f |
284 | * means no lun present. */ | |
09b6b51b AS |
285 | unsigned int no_report_luns:1; /* Don't use |
286 | * REPORT LUNS for scanning. */ | |
279afdfe EM |
287 | unsigned int expecting_lun_change:1; /* A device has reported |
288 | * a 3F/0E UA, other devices on | |
289 | * the same target will also. */ | |
7ae65c0f CH |
290 | /* commands actually active on LLD. */ |
291 | atomic_t target_busy; | |
cd9070c9 CH |
292 | atomic_t target_blocked; |
293 | ||
f0c0a376 MC |
294 | /* |
295 | * LLDs should set this in the slave_alloc host template callout. | |
296 | * If set to zero then there is not limit. | |
297 | */ | |
298 | unsigned int can_queue; | |
f0c0a376 MC |
299 | unsigned int max_target_blocked; |
300 | #define SCSI_DEFAULT_TARGET_BLOCKED 3 | |
1bfc5d9d | 301 | |
6f3a2024 | 302 | char scsi_level; |
ffedb452 | 303 | enum scsi_target_state state; |
a283bd37 JB |
304 | void *hostdata; /* available to low-level driver */ |
305 | unsigned long starget_data[0]; /* for the transport */ | |
306 | /* starget_data must be the last element!!!! */ | |
1da177e4 LT |
307 | } __attribute__((aligned(sizeof(unsigned long)))); |
308 | ||
309 | #define to_scsi_target(d) container_of(d, struct scsi_target, dev) | |
310 | static inline struct scsi_target *scsi_target(struct scsi_device *sdev) | |
311 | { | |
312 | return to_scsi_target(sdev->sdev_gendev.parent); | |
313 | } | |
314 | #define transport_class_to_starget(class_dev) \ | |
ee959b00 | 315 | to_scsi_target(class_dev->parent) |
1da177e4 | 316 | |
9ccfc756 JB |
317 | #define starget_printk(prefix, starget, fmt, a...) \ |
318 | dev_printk(prefix, &(starget)->dev, fmt, ##a) | |
319 | ||
1da177e4 | 320 | extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, |
9cb78c16 | 321 | uint, uint, u64, void *hostdata); |
146f7262 | 322 | extern int scsi_add_device(struct Scsi_Host *host, uint channel, |
9cb78c16 | 323 | uint target, u64 lun); |
a6a8d9f8 | 324 | extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); |
1da177e4 | 325 | extern void scsi_remove_device(struct scsi_device *); |
a6a8d9f8 | 326 | extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); |
b3ae8780 | 327 | void scsi_attach_vpd(struct scsi_device *sdev); |
1da177e4 LT |
328 | |
329 | extern int scsi_device_get(struct scsi_device *); | |
330 | extern void scsi_device_put(struct scsi_device *); | |
331 | extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, | |
9cb78c16 | 332 | uint, uint, u64); |
1da177e4 | 333 | extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, |
9cb78c16 | 334 | uint, uint, u64); |
1da177e4 | 335 | extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, |
9cb78c16 | 336 | u64); |
1da177e4 | 337 | extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, |
9cb78c16 | 338 | u64); |
1da177e4 LT |
339 | extern void starget_for_each_device(struct scsi_target *, void *, |
340 | void (*fn)(struct scsi_device *, void *)); | |
522939d4 MR |
341 | extern void __starget_for_each_device(struct scsi_target *, void *, |
342 | void (*fn)(struct scsi_device *, | |
343 | void *)); | |
1da177e4 LT |
344 | |
345 | /* only exposed to implement shost_for_each_device */ | |
346 | extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, | |
347 | struct scsi_device *); | |
348 | ||
349 | /** | |
3e082a91 MW |
350 | * shost_for_each_device - iterate over all devices of a host |
351 | * @sdev: the &struct scsi_device to use as a cursor | |
352 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 353 | * |
3e082a91 MW |
354 | * Iterator that returns each device attached to @shost. This loop |
355 | * takes a reference on each device and releases it at the end. If | |
356 | * you break out of the loop, you must call scsi_device_put(sdev). | |
1da177e4 LT |
357 | */ |
358 | #define shost_for_each_device(sdev, shost) \ | |
359 | for ((sdev) = __scsi_iterate_devices((shost), NULL); \ | |
360 | (sdev); \ | |
361 | (sdev) = __scsi_iterate_devices((shost), (sdev))) | |
362 | ||
363 | /** | |
3e082a91 MW |
364 | * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) |
365 | * @sdev: the &struct scsi_device to use as a cursor | |
366 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 367 | * |
3e082a91 MW |
368 | * Iterator that returns each device attached to @shost. It does _not_ |
369 | * take a reference on the scsi_device, so the whole loop must be | |
370 | * protected by shost->host_lock. | |
1da177e4 | 371 | * |
3e082a91 MW |
372 | * Note: The only reason to use this is because you need to access the |
373 | * device list in interrupt context. Otherwise you really want to use | |
374 | * shost_for_each_device instead. | |
1da177e4 LT |
375 | */ |
376 | #define __shost_for_each_device(sdev, shost) \ | |
377 | list_for_each_entry((sdev), &((shost)->__devices), siblings) | |
378 | ||
db5ed4df | 379 | extern int scsi_change_queue_depth(struct scsi_device *, int); |
1da177e4 LT |
380 | extern int scsi_track_queue_full(struct scsi_device *, int); |
381 | ||
382 | extern int scsi_set_medium_removal(struct scsi_device *, char); | |
383 | ||
384 | extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, | |
385 | unsigned char *buffer, int len, int timeout, | |
1cf72699 | 386 | int retries, struct scsi_mode_data *data, |
ea73a9f2 | 387 | struct scsi_sense_hdr *); |
5baba830 JB |
388 | extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, |
389 | int modepage, unsigned char *buffer, int len, | |
390 | int timeout, int retries, | |
391 | struct scsi_mode_data *data, | |
392 | struct scsi_sense_hdr *); | |
1da177e4 | 393 | extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, |
001aac25 | 394 | int retries, struct scsi_sense_hdr *sshdr); |
e3deec09 JB |
395 | extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, |
396 | int buf_len); | |
3c6bdaea MP |
397 | extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, |
398 | unsigned int len, unsigned char opcode); | |
1da177e4 LT |
399 | extern int scsi_device_set_state(struct scsi_device *sdev, |
400 | enum scsi_device_state state); | |
a341cd0f JG |
401 | extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, |
402 | gfp_t gfpflags); | |
403 | extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); | |
404 | extern void sdev_evt_send_simple(struct scsi_device *sdev, | |
405 | enum scsi_device_event evt_type, gfp_t gfpflags); | |
1da177e4 LT |
406 | extern int scsi_device_quiesce(struct scsi_device *sdev); |
407 | extern void scsi_device_resume(struct scsi_device *sdev); | |
408 | extern void scsi_target_quiesce(struct scsi_target *); | |
409 | extern void scsi_target_resume(struct scsi_target *); | |
410 | extern void scsi_scan_target(struct device *parent, unsigned int channel, | |
9cb78c16 | 411 | unsigned int id, u64 lun, int rescan); |
1da177e4 LT |
412 | extern void scsi_target_reap(struct scsi_target *); |
413 | extern void scsi_target_block(struct device *); | |
5d9fb5cc | 414 | extern void scsi_target_unblock(struct device *, enum scsi_device_state); |
1da177e4 | 415 | extern void scsi_remove_target(struct device *); |
9cb78c16 HR |
416 | extern void int_to_scsilun(u64, struct scsi_lun *); |
417 | extern u64 scsilun_to_int(struct scsi_lun *); | |
1da177e4 LT |
418 | extern const char *scsi_device_state_name(enum scsi_device_state); |
419 | extern int scsi_is_sdev_device(const struct device *); | |
420 | extern int scsi_is_target_device(const struct device *); | |
33aa687d JB |
421 | extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, |
422 | int data_direction, void *buffer, unsigned bufflen, | |
423 | unsigned char *sense, int timeout, int retries, | |
2bfad21e | 424 | u64 flags, int *resid); |
9b21493c LM |
425 | extern int scsi_execute_req_flags(struct scsi_device *sdev, |
426 | const unsigned char *cmd, int data_direction, void *buffer, | |
427 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, | |
2bfad21e | 428 | int retries, int *resid, u64 flags); |
9b21493c LM |
429 | static inline int scsi_execute_req(struct scsi_device *sdev, |
430 | const unsigned char *cmd, int data_direction, void *buffer, | |
431 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, | |
432 | int retries, int *resid) | |
433 | { | |
434 | return scsi_execute_req_flags(sdev, cmd, data_direction, buffer, | |
435 | bufflen, sshdr, timeout, retries, resid, 0); | |
436 | } | |
6f4c827e AL |
437 | extern void sdev_disable_disk_events(struct scsi_device *sdev); |
438 | extern void sdev_enable_disk_events(struct scsi_device *sdev); | |
33aa687d | 439 | |
4f7ad521 | 440 | #ifdef CONFIG_PM |
bc4f2401 AS |
441 | extern int scsi_autopm_get_device(struct scsi_device *); |
442 | extern void scsi_autopm_put_device(struct scsi_device *); | |
443 | #else | |
444 | static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } | |
445 | static inline void scsi_autopm_put_device(struct scsi_device *d) {} | |
4f7ad521 | 446 | #endif /* CONFIG_PM */ |
bc4f2401 | 447 | |
cb5d9e09 | 448 | static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) |
e28482c5 | 449 | { |
cb5d9e09 | 450 | return device_reprobe(&sdev->sdev_gendev); |
e28482c5 JB |
451 | } |
452 | ||
01d7b3b8 JG |
453 | static inline unsigned int sdev_channel(struct scsi_device *sdev) |
454 | { | |
455 | return sdev->channel; | |
456 | } | |
457 | ||
458 | static inline unsigned int sdev_id(struct scsi_device *sdev) | |
459 | { | |
460 | return sdev->id; | |
461 | } | |
462 | ||
463 | #define scmd_id(scmd) sdev_id((scmd)->device) | |
464 | #define scmd_channel(scmd) sdev_channel((scmd)->device) | |
465 | ||
0f1d87a2 JB |
466 | /* |
467 | * checks for positions of the SCSI state machine | |
468 | */ | |
1da177e4 LT |
469 | static inline int scsi_device_online(struct scsi_device *sdev) |
470 | { | |
0762a482 | 471 | return (sdev->sdev_state != SDEV_OFFLINE && |
1b8d2620 | 472 | sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && |
0762a482 | 473 | sdev->sdev_state != SDEV_DEL); |
1da177e4 | 474 | } |
0f1d87a2 JB |
475 | static inline int scsi_device_blocked(struct scsi_device *sdev) |
476 | { | |
6f4267e3 JB |
477 | return sdev->sdev_state == SDEV_BLOCK || |
478 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 JB |
479 | } |
480 | static inline int scsi_device_created(struct scsi_device *sdev) | |
481 | { | |
6f4267e3 JB |
482 | return sdev->sdev_state == SDEV_CREATED || |
483 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 | 484 | } |
1da177e4 LT |
485 | |
486 | /* accessor functions for the SCSI parameters */ | |
487 | static inline int scsi_device_sync(struct scsi_device *sdev) | |
488 | { | |
489 | return sdev->sdtr; | |
490 | } | |
491 | static inline int scsi_device_wide(struct scsi_device *sdev) | |
492 | { | |
493 | return sdev->wdtr; | |
494 | } | |
495 | static inline int scsi_device_dt(struct scsi_device *sdev) | |
496 | { | |
497 | return sdev->ppr; | |
498 | } | |
499 | static inline int scsi_device_dt_only(struct scsi_device *sdev) | |
500 | { | |
501 | if (sdev->inquiry_len < 57) | |
502 | return 0; | |
503 | return (sdev->inquiry[56] & 0x0c) == 0x04; | |
504 | } | |
505 | static inline int scsi_device_ius(struct scsi_device *sdev) | |
506 | { | |
507 | if (sdev->inquiry_len < 57) | |
508 | return 0; | |
509 | return sdev->inquiry[56] & 0x01; | |
510 | } | |
511 | static inline int scsi_device_qas(struct scsi_device *sdev) | |
512 | { | |
513 | if (sdev->inquiry_len < 57) | |
514 | return 0; | |
515 | return sdev->inquiry[56] & 0x02; | |
516 | } | |
b30c2fc1 JB |
517 | static inline int scsi_device_enclosure(struct scsi_device *sdev) |
518 | { | |
d1e12de8 | 519 | return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; |
b30c2fc1 | 520 | } |
d7b8bcb0 | 521 | |
7027ad72 MP |
522 | static inline int scsi_device_protection(struct scsi_device *sdev) |
523 | { | |
d974e426 MP |
524 | if (sdev->no_dif) |
525 | return 0; | |
526 | ||
d211f052 | 527 | return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); |
7027ad72 MP |
528 | } |
529 | ||
d7c48feb HR |
530 | static inline int scsi_device_tpgs(struct scsi_device *sdev) |
531 | { | |
532 | return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; | |
533 | } | |
534 | ||
d7b8bcb0 MT |
535 | #define MODULE_ALIAS_SCSI_DEVICE(type) \ |
536 | MODULE_ALIAS("scsi:t-" __stringify(type) "*") | |
537 | #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" | |
538 | ||
1da177e4 | 539 | #endif /* _SCSI_SCSI_DEVICE_H */ |