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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 | ||
c2a9331c | 84 | /* this is now protected by the request_queue->queue_lock */ |
06f81ea8 | 85 | unsigned int device_busy; /* commands actually active on |
86 | * low-level. protected by queue_lock. */ | |
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 LT |
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 */ | |
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 writeable:1; |
131 | unsigned removable:1; | |
132 | unsigned changed:1; /* Data invalid due to media change */ | |
133 | unsigned busy:1; /* Used to prevent races */ | |
134 | unsigned lockable:1; /* Able to prevent media removal */ | |
135 | unsigned locked:1; /* Media removal disabled */ | |
136 | unsigned borken:1; /* Tell the Seagate driver to be | |
137 | * painfully slow on this device */ | |
138 | unsigned disconnect:1; /* can disconnect */ | |
139 | unsigned soft_reset:1; /* Uses soft reset option */ | |
140 | unsigned sdtr:1; /* Device supports SDTR messages */ | |
141 | unsigned wdtr:1; /* Device supports WDTR messages */ | |
142 | unsigned ppr:1; /* Device supports PPR messages */ | |
143 | unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ | |
144 | unsigned simple_tags:1; /* simple queue tag messages are enabled */ | |
145 | unsigned ordered_tags:1;/* ordered queue tag messages are enabled */ | |
1da177e4 LT |
146 | unsigned was_reset:1; /* There was a bus reset on the bus for |
147 | * this device */ | |
148 | unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN | |
149 | * because we did a bus reset. */ | |
150 | unsigned use_10_for_rw:1; /* first try 10-byte read / write */ | |
151 | unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ | |
3c6bdaea | 152 | unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ |
5db44863 | 153 | unsigned no_write_same:1; /* no WRITE SAME command */ |
53ad570b | 154 | unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ |
1da177e4 LT |
155 | unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ |
156 | unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ | |
09b6b51b | 157 | unsigned skip_vpd_pages:1; /* do not read VPD pages */ |
1da177e4 LT |
158 | unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ |
159 | unsigned no_start_on_add:1; /* do not issue start on add */ | |
160 | unsigned allow_restart:1; /* issue START_UNIT in error handler */ | |
c3c94c5a | 161 | unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ |
d2886ea3 | 162 | unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ |
1da177e4 LT |
163 | unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ |
164 | unsigned select_no_atn:1; | |
165 | unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ | |
61bf54b7 | 166 | unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ |
1da177e4 | 167 | unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ |
18351070 LT |
168 | unsigned last_sector_bug:1; /* do not use multisector accesses on |
169 | SD_LAST_BUGGY_SECTORS */ | |
8e04d805 | 170 | unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */ |
5ce524bd | 171 | unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */ |
6a0bdffa | 172 | unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */ |
860dc736 | 173 | unsigned is_visible:1; /* is the device visible in sysfs */ |
b81478d8 | 174 | unsigned wce_default_on:1; /* Cache is ON by default */ |
d974e426 | 175 | unsigned no_dif:1; /* T10 PI (DIF) should be disabled */ |
b14bf2d0 | 176 | unsigned broken_fua:1; /* Don't set FUA bit */ |
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 device_blocked; /* Device returned QUEUE_FULL. */ |
186 | ||
187 | unsigned int max_device_blocked; /* what device_blocked counts down from */ | |
188 | #define SCSI_DEFAULT_DEVICE_BLOCKED 3 | |
189 | ||
190 | atomic_t iorequest_cnt; | |
191 | atomic_t iodone_cnt; | |
192 | atomic_t ioerr_cnt; | |
193 | ||
ee959b00 TJ |
194 | struct device sdev_gendev, |
195 | sdev_dev; | |
1da177e4 | 196 | |
ffedb452 | 197 | struct execute_work ew; /* used to get process context on put */ |
9937a5e2 | 198 | struct work_struct requeue_work; |
ffedb452 | 199 | |
a6a8d9f8 | 200 | struct scsi_dh_data *scsi_dh_data; |
1da177e4 LT |
201 | enum scsi_device_state sdev_state; |
202 | unsigned long sdev_data[0]; | |
203 | } __attribute__((aligned(sizeof(unsigned long)))); | |
a6a8d9f8 | 204 | |
765cbc6d HR |
205 | struct scsi_dh_devlist { |
206 | char *vendor; | |
207 | char *model; | |
208 | }; | |
209 | ||
3ae31f6a | 210 | typedef void (*activate_complete)(void *, int); |
a6a8d9f8 CS |
211 | struct scsi_device_handler { |
212 | /* Used by the infrastructure */ | |
213 | struct list_head list; /* list of scsi_device_handlers */ | |
a6a8d9f8 CS |
214 | |
215 | /* Filled by the hardware handler */ | |
216 | struct module *module; | |
217 | const char *name; | |
765cbc6d | 218 | const struct scsi_dh_devlist *devlist; |
a6a8d9f8 | 219 | int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *); |
765cbc6d HR |
220 | int (*attach)(struct scsi_device *); |
221 | void (*detach)(struct scsi_device *); | |
3ae31f6a | 222 | int (*activate)(struct scsi_device *, activate_complete, void *); |
a6a8d9f8 | 223 | int (*prep_fn)(struct scsi_device *, struct request *); |
18ee70c9 | 224 | int (*set_params)(struct scsi_device *, const char *); |
6c3633d0 | 225 | bool (*match)(struct scsi_device *); |
a6a8d9f8 CS |
226 | }; |
227 | ||
228 | struct scsi_dh_data { | |
229 | struct scsi_device_handler *scsi_dh; | |
6c10db72 CS |
230 | struct scsi_device *sdev; |
231 | struct kref kref; | |
a6a8d9f8 CS |
232 | char buf[0]; |
233 | }; | |
234 | ||
1da177e4 LT |
235 | #define to_scsi_device(d) \ |
236 | container_of(d, struct scsi_device, sdev_gendev) | |
237 | #define class_to_sdev(d) \ | |
ee959b00 | 238 | container_of(d, struct scsi_device, sdev_dev) |
1da177e4 | 239 | #define transport_class_to_sdev(class_dev) \ |
ee959b00 | 240 | to_scsi_device(class_dev->parent) |
1da177e4 | 241 | |
9ccfc756 JB |
242 | #define sdev_printk(prefix, sdev, fmt, a...) \ |
243 | dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a) | |
244 | ||
3af74a3c DW |
245 | #define sdev_dbg(sdev, fmt, a...) \ |
246 | dev_dbg(&(sdev)->sdev_gendev, fmt, ##a) | |
247 | ||
a4d04a4c MP |
248 | #define scmd_printk(prefix, scmd, fmt, a...) \ |
249 | (scmd)->request->rq_disk ? \ | |
250 | sdev_printk(prefix, (scmd)->device, "[%s] " fmt, \ | |
251 | (scmd)->request->rq_disk->disk_name, ##a) : \ | |
252 | sdev_printk(prefix, (scmd)->device, fmt, ##a) | |
01d7b3b8 | 253 | |
3af74a3c DW |
254 | #define scmd_dbg(scmd, fmt, a...) \ |
255 | do { \ | |
256 | if ((scmd)->request->rq_disk) \ | |
257 | sdev_dbg((scmd)->device, "[%s] " fmt, \ | |
258 | (scmd)->request->rq_disk->disk_name, ##a);\ | |
259 | else \ | |
260 | sdev_dbg((scmd)->device, fmt, ##a); \ | |
261 | } while (0) | |
262 | ||
ffedb452 | 263 | enum scsi_target_state { |
643eb2d9 JB |
264 | STARGET_CREATED = 1, |
265 | STARGET_RUNNING, | |
ffedb452 JB |
266 | STARGET_DEL, |
267 | }; | |
268 | ||
1da177e4 LT |
269 | /* |
270 | * scsi_target: representation of a scsi target, for now, this is only | |
271 | * used for single_lun devices. If no one has active IO to the target, | |
272 | * starget_sdev_user is NULL, else it points to the active sdev. | |
273 | */ | |
274 | struct scsi_target { | |
275 | struct scsi_device *starget_sdev_user; | |
276 | struct list_head siblings; | |
277 | struct list_head devices; | |
278 | struct device dev; | |
e63ed0d7 | 279 | struct kref reap_ref; /* last put renders target invisible */ |
1da177e4 LT |
280 | unsigned int channel; |
281 | unsigned int id; /* target id ... replace | |
282 | * scsi_device.id eventually */ | |
1bfc5d9d | 283 | unsigned int create:1; /* signal that it needs to be added */ |
25d7c363 TB |
284 | unsigned int single_lun:1; /* Indicates we should only |
285 | * allow I/O to one of the luns | |
286 | * for the device at a time. */ | |
de8c46bf AS |
287 | unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f |
288 | * means no lun present. */ | |
09b6b51b AS |
289 | unsigned int no_report_luns:1; /* Don't use |
290 | * REPORT LUNS for scanning. */ | |
279afdfe EM |
291 | unsigned int expecting_lun_change:1; /* A device has reported |
292 | * a 3F/0E UA, other devices on | |
293 | * the same target will also. */ | |
f0c0a376 MC |
294 | /* commands actually active on LLD. protected by host lock. */ |
295 | unsigned int target_busy; | |
296 | /* | |
297 | * LLDs should set this in the slave_alloc host template callout. | |
298 | * If set to zero then there is not limit. | |
299 | */ | |
300 | unsigned int can_queue; | |
301 | unsigned int target_blocked; | |
302 | unsigned int max_target_blocked; | |
303 | #define SCSI_DEFAULT_TARGET_BLOCKED 3 | |
1bfc5d9d | 304 | |
6f3a2024 | 305 | char scsi_level; |
ffedb452 | 306 | enum scsi_target_state state; |
a283bd37 JB |
307 | void *hostdata; /* available to low-level driver */ |
308 | unsigned long starget_data[0]; /* for the transport */ | |
309 | /* starget_data must be the last element!!!! */ | |
1da177e4 LT |
310 | } __attribute__((aligned(sizeof(unsigned long)))); |
311 | ||
312 | #define to_scsi_target(d) container_of(d, struct scsi_target, dev) | |
313 | static inline struct scsi_target *scsi_target(struct scsi_device *sdev) | |
314 | { | |
315 | return to_scsi_target(sdev->sdev_gendev.parent); | |
316 | } | |
317 | #define transport_class_to_starget(class_dev) \ | |
ee959b00 | 318 | to_scsi_target(class_dev->parent) |
1da177e4 | 319 | |
9ccfc756 JB |
320 | #define starget_printk(prefix, starget, fmt, a...) \ |
321 | dev_printk(prefix, &(starget)->dev, fmt, ##a) | |
322 | ||
1da177e4 LT |
323 | extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, |
324 | uint, uint, uint, void *hostdata); | |
146f7262 JB |
325 | extern int scsi_add_device(struct Scsi_Host *host, uint channel, |
326 | uint target, uint lun); | |
a6a8d9f8 | 327 | extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); |
1da177e4 | 328 | extern void scsi_remove_device(struct scsi_device *); |
a6a8d9f8 | 329 | extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); |
b3ae8780 | 330 | void scsi_attach_vpd(struct scsi_device *sdev); |
1da177e4 LT |
331 | |
332 | extern int scsi_device_get(struct scsi_device *); | |
333 | extern void scsi_device_put(struct scsi_device *); | |
334 | extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, | |
335 | uint, uint, uint); | |
336 | extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, | |
337 | uint, uint, uint); | |
338 | extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, | |
339 | uint); | |
340 | extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, | |
341 | uint); | |
342 | extern void starget_for_each_device(struct scsi_target *, void *, | |
343 | void (*fn)(struct scsi_device *, void *)); | |
522939d4 MR |
344 | extern void __starget_for_each_device(struct scsi_target *, void *, |
345 | void (*fn)(struct scsi_device *, | |
346 | void *)); | |
1da177e4 LT |
347 | |
348 | /* only exposed to implement shost_for_each_device */ | |
349 | extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, | |
350 | struct scsi_device *); | |
351 | ||
352 | /** | |
3e082a91 MW |
353 | * shost_for_each_device - iterate over all devices of a host |
354 | * @sdev: the &struct scsi_device to use as a cursor | |
355 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 356 | * |
3e082a91 MW |
357 | * Iterator that returns each device attached to @shost. This loop |
358 | * takes a reference on each device and releases it at the end. If | |
359 | * you break out of the loop, you must call scsi_device_put(sdev). | |
1da177e4 LT |
360 | */ |
361 | #define shost_for_each_device(sdev, shost) \ | |
362 | for ((sdev) = __scsi_iterate_devices((shost), NULL); \ | |
363 | (sdev); \ | |
364 | (sdev) = __scsi_iterate_devices((shost), (sdev))) | |
365 | ||
366 | /** | |
3e082a91 MW |
367 | * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) |
368 | * @sdev: the &struct scsi_device to use as a cursor | |
369 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 370 | * |
3e082a91 MW |
371 | * Iterator that returns each device attached to @shost. It does _not_ |
372 | * take a reference on the scsi_device, so the whole loop must be | |
373 | * protected by shost->host_lock. | |
1da177e4 | 374 | * |
3e082a91 MW |
375 | * Note: The only reason to use this is because you need to access the |
376 | * device list in interrupt context. Otherwise you really want to use | |
377 | * shost_for_each_device instead. | |
1da177e4 LT |
378 | */ |
379 | #define __shost_for_each_device(sdev, shost) \ | |
380 | list_for_each_entry((sdev), &((shost)->__devices), siblings) | |
381 | ||
382 | extern void scsi_adjust_queue_depth(struct scsi_device *, int, int); | |
383 | extern int scsi_track_queue_full(struct scsi_device *, int); | |
384 | ||
385 | extern int scsi_set_medium_removal(struct scsi_device *, char); | |
386 | ||
387 | extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, | |
388 | unsigned char *buffer, int len, int timeout, | |
1cf72699 | 389 | int retries, struct scsi_mode_data *data, |
ea73a9f2 | 390 | struct scsi_sense_hdr *); |
5baba830 JB |
391 | extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, |
392 | int modepage, unsigned char *buffer, int len, | |
393 | int timeout, int retries, | |
394 | struct scsi_mode_data *data, | |
395 | struct scsi_sense_hdr *); | |
1da177e4 | 396 | extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, |
001aac25 | 397 | int retries, struct scsi_sense_hdr *sshdr); |
e3deec09 JB |
398 | extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, |
399 | int buf_len); | |
3c6bdaea MP |
400 | extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, |
401 | unsigned int len, unsigned char opcode); | |
1da177e4 LT |
402 | extern int scsi_device_set_state(struct scsi_device *sdev, |
403 | enum scsi_device_state state); | |
a341cd0f JG |
404 | extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, |
405 | gfp_t gfpflags); | |
406 | extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); | |
407 | extern void sdev_evt_send_simple(struct scsi_device *sdev, | |
408 | enum scsi_device_event evt_type, gfp_t gfpflags); | |
1da177e4 LT |
409 | extern int scsi_device_quiesce(struct scsi_device *sdev); |
410 | extern void scsi_device_resume(struct scsi_device *sdev); | |
411 | extern void scsi_target_quiesce(struct scsi_target *); | |
412 | extern void scsi_target_resume(struct scsi_target *); | |
413 | extern void scsi_scan_target(struct device *parent, unsigned int channel, | |
414 | unsigned int id, unsigned int lun, int rescan); | |
415 | extern void scsi_target_reap(struct scsi_target *); | |
416 | extern void scsi_target_block(struct device *); | |
5d9fb5cc | 417 | extern void scsi_target_unblock(struct device *, enum scsi_device_state); |
1da177e4 | 418 | extern void scsi_remove_target(struct device *); |
2f4701d8 | 419 | extern void int_to_scsilun(unsigned int, struct scsi_lun *); |
462b7859 | 420 | extern int scsilun_to_int(struct scsi_lun *); |
1da177e4 LT |
421 | extern const char *scsi_device_state_name(enum scsi_device_state); |
422 | extern int scsi_is_sdev_device(const struct device *); | |
423 | extern int scsi_is_target_device(const struct device *); | |
33aa687d JB |
424 | extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, |
425 | int data_direction, void *buffer, unsigned bufflen, | |
426 | unsigned char *sense, int timeout, int retries, | |
2bfad21e | 427 | u64 flags, int *resid); |
9b21493c LM |
428 | extern int scsi_execute_req_flags(struct scsi_device *sdev, |
429 | const unsigned char *cmd, int data_direction, void *buffer, | |
430 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, | |
2bfad21e | 431 | int retries, int *resid, u64 flags); |
9b21493c LM |
432 | static inline int scsi_execute_req(struct scsi_device *sdev, |
433 | const unsigned char *cmd, int data_direction, void *buffer, | |
434 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, | |
435 | int retries, int *resid) | |
436 | { | |
437 | return scsi_execute_req_flags(sdev, cmd, data_direction, buffer, | |
438 | bufflen, sshdr, timeout, retries, resid, 0); | |
439 | } | |
6f4c827e AL |
440 | extern void sdev_disable_disk_events(struct scsi_device *sdev); |
441 | extern void sdev_enable_disk_events(struct scsi_device *sdev); | |
33aa687d | 442 | |
bc4f2401 AS |
443 | #ifdef CONFIG_PM_RUNTIME |
444 | extern int scsi_autopm_get_device(struct scsi_device *); | |
445 | extern void scsi_autopm_put_device(struct scsi_device *); | |
446 | #else | |
447 | static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } | |
448 | static inline void scsi_autopm_put_device(struct scsi_device *d) {} | |
449 | #endif /* CONFIG_PM_RUNTIME */ | |
450 | ||
cb5d9e09 | 451 | static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) |
e28482c5 | 452 | { |
cb5d9e09 | 453 | return device_reprobe(&sdev->sdev_gendev); |
e28482c5 JB |
454 | } |
455 | ||
01d7b3b8 JG |
456 | static inline unsigned int sdev_channel(struct scsi_device *sdev) |
457 | { | |
458 | return sdev->channel; | |
459 | } | |
460 | ||
461 | static inline unsigned int sdev_id(struct scsi_device *sdev) | |
462 | { | |
463 | return sdev->id; | |
464 | } | |
465 | ||
466 | #define scmd_id(scmd) sdev_id((scmd)->device) | |
467 | #define scmd_channel(scmd) sdev_channel((scmd)->device) | |
468 | ||
0f1d87a2 JB |
469 | /* |
470 | * checks for positions of the SCSI state machine | |
471 | */ | |
1da177e4 LT |
472 | static inline int scsi_device_online(struct scsi_device *sdev) |
473 | { | |
0762a482 | 474 | return (sdev->sdev_state != SDEV_OFFLINE && |
1b8d2620 | 475 | sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && |
0762a482 | 476 | sdev->sdev_state != SDEV_DEL); |
1da177e4 | 477 | } |
0f1d87a2 JB |
478 | static inline int scsi_device_blocked(struct scsi_device *sdev) |
479 | { | |
6f4267e3 JB |
480 | return sdev->sdev_state == SDEV_BLOCK || |
481 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 JB |
482 | } |
483 | static inline int scsi_device_created(struct scsi_device *sdev) | |
484 | { | |
6f4267e3 JB |
485 | return sdev->sdev_state == SDEV_CREATED || |
486 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 | 487 | } |
1da177e4 LT |
488 | |
489 | /* accessor functions for the SCSI parameters */ | |
490 | static inline int scsi_device_sync(struct scsi_device *sdev) | |
491 | { | |
492 | return sdev->sdtr; | |
493 | } | |
494 | static inline int scsi_device_wide(struct scsi_device *sdev) | |
495 | { | |
496 | return sdev->wdtr; | |
497 | } | |
498 | static inline int scsi_device_dt(struct scsi_device *sdev) | |
499 | { | |
500 | return sdev->ppr; | |
501 | } | |
502 | static inline int scsi_device_dt_only(struct scsi_device *sdev) | |
503 | { | |
504 | if (sdev->inquiry_len < 57) | |
505 | return 0; | |
506 | return (sdev->inquiry[56] & 0x0c) == 0x04; | |
507 | } | |
508 | static inline int scsi_device_ius(struct scsi_device *sdev) | |
509 | { | |
510 | if (sdev->inquiry_len < 57) | |
511 | return 0; | |
512 | return sdev->inquiry[56] & 0x01; | |
513 | } | |
514 | static inline int scsi_device_qas(struct scsi_device *sdev) | |
515 | { | |
516 | if (sdev->inquiry_len < 57) | |
517 | return 0; | |
518 | return sdev->inquiry[56] & 0x02; | |
519 | } | |
b30c2fc1 JB |
520 | static inline int scsi_device_enclosure(struct scsi_device *sdev) |
521 | { | |
d1e12de8 | 522 | return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; |
b30c2fc1 | 523 | } |
d7b8bcb0 | 524 | |
7027ad72 MP |
525 | static inline int scsi_device_protection(struct scsi_device *sdev) |
526 | { | |
d974e426 MP |
527 | if (sdev->no_dif) |
528 | return 0; | |
529 | ||
d211f052 | 530 | return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); |
7027ad72 MP |
531 | } |
532 | ||
d7c48feb HR |
533 | static inline int scsi_device_tpgs(struct scsi_device *sdev) |
534 | { | |
535 | return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; | |
536 | } | |
537 | ||
d7b8bcb0 MT |
538 | #define MODULE_ALIAS_SCSI_DEVICE(type) \ |
539 | MODULE_ALIAS("scsi:t-" __stringify(type) "*") | |
540 | #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" | |
541 | ||
1da177e4 | 542 | #endif /* _SCSI_SCSI_DEVICE_H */ |