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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 */ | |
14c3e677 | 60 | SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, /* 2A 06 UA reported */ |
279afdfe EM |
61 | |
62 | SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE, | |
14c3e677 | 63 | SDEV_EVT_LAST = SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, |
a341cd0f | 64 | |
a341cd0f JG |
65 | SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1 |
66 | }; | |
67 | ||
68 | struct scsi_event { | |
69 | enum scsi_device_event evt_type; | |
70 | struct list_head node; | |
71 | ||
72 | /* put union of data structures, for non-simple event types, | |
73 | * here | |
74 | */ | |
75 | }; | |
76 | ||
1da177e4 LT |
77 | struct scsi_device { |
78 | struct Scsi_Host *host; | |
79 | struct request_queue *request_queue; | |
80 | ||
81 | /* the next two are protected by the host->host_lock */ | |
82 | struct list_head siblings; /* list of all devices on this host */ | |
83 | struct list_head same_target_siblings; /* just the devices sharing same target id */ | |
84 | ||
71e75c97 | 85 | atomic_t device_busy; /* commands actually active on LLDD */ |
cd9070c9 CH |
86 | atomic_t device_blocked; /* Device returned QUEUE_FULL. */ |
87 | ||
1da177e4 LT |
88 | spinlock_t list_lock; |
89 | struct list_head cmd_list; /* queue of in use SCSI Command structures */ | |
90 | struct list_head starved_entry; | |
91 | struct scsi_cmnd *current_cmnd; /* currently active command */ | |
92 | unsigned short queue_depth; /* How deep of a queue we want */ | |
4a84067d | 93 | unsigned short max_queue_depth; /* max queue depth */ |
1da177e4 LT |
94 | unsigned short last_queue_full_depth; /* These two are used by */ |
95 | unsigned short last_queue_full_count; /* scsi_track_queue_full() */ | |
4a84067d VD |
96 | unsigned long last_queue_full_time; /* last queue full time */ |
97 | unsigned long queue_ramp_up_period; /* ramp up period in jiffies */ | |
98 | #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ) | |
99 | ||
100 | unsigned long last_queue_ramp_up; /* last queue ramp up time */ | |
1da177e4 | 101 | |
9cb78c16 HR |
102 | unsigned int id, channel; |
103 | u64 lun; | |
1da177e4 LT |
104 | unsigned int manufacturer; /* Manufacturer of device, for using |
105 | * vendor-specific cmd's */ | |
106 | unsigned sector_size; /* size in bytes */ | |
107 | ||
108 | void *hostdata; /* available to low-level driver */ | |
1da177e4 LT |
109 | char type; |
110 | char scsi_level; | |
111 | char inq_periph_qual; /* PQ from INQUIRY data */ | |
112 | unsigned char inquiry_len; /* valid bytes in 'inquiry' */ | |
113 | unsigned char * inquiry; /* INQUIRY response data */ | |
7f23e146 JB |
114 | const char * vendor; /* [back_compat] point into 'inquiry' ... */ |
115 | const char * model; /* ... after scan; point to static string */ | |
116 | const char * rev; /* ... "nullnullnullnull" before scan */ | |
b3ae8780 HR |
117 | |
118 | #define SCSI_VPD_PG_LEN 255 | |
119 | int vpd_pg83_len; | |
120 | unsigned char *vpd_pg83; | |
121 | int vpd_pg80_len; | |
122 | unsigned char *vpd_pg80; | |
1da177e4 LT |
123 | unsigned char current_tag; /* current tag */ |
124 | struct scsi_target *sdev_target; /* used only for single_lun */ | |
125 | ||
126 | unsigned int sdev_bflags; /* black/white flags as also found in | |
127 | * scsi_devinfo.[hc]. For now used only to | |
128 | * pass settings from slave_alloc to scsi | |
129 | * core. */ | |
0816c925 | 130 | unsigned int eh_timeout; /* Error handling timeout */ |
1da177e4 LT |
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 */ | |
1da177e4 LT |
145 | unsigned was_reset:1; /* There was a bus reset on the bus for |
146 | * this device */ | |
147 | unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN | |
148 | * because we did a bus reset. */ | |
149 | unsigned use_10_for_rw:1; /* first try 10-byte read / write */ | |
150 | unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ | |
3c6bdaea | 151 | unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ |
5db44863 | 152 | unsigned no_write_same:1; /* no WRITE SAME command */ |
53ad570b | 153 | unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ |
1da177e4 LT |
154 | unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ |
155 | unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ | |
09b6b51b | 156 | unsigned skip_vpd_pages:1; /* do not read VPD pages */ |
c1d40a52 | 157 | unsigned try_vpd_pages:1; /* attempt to 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 */ |
50c4e964 | 177 | unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */ |
1da177e4 | 178 | |
6f4c827e AL |
179 | atomic_t disk_events_disable_depth; /* disable depth for disk events */ |
180 | ||
a341cd0f | 181 | DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ |
279afdfe | 182 | DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */ |
a341cd0f JG |
183 | struct list_head event_list; /* asserted events */ |
184 | struct work_struct event_work; | |
185 | ||
1da177e4 LT |
186 | unsigned int max_device_blocked; /* what device_blocked counts down from */ |
187 | #define SCSI_DEFAULT_DEVICE_BLOCKED 3 | |
188 | ||
189 | atomic_t iorequest_cnt; | |
190 | atomic_t iodone_cnt; | |
191 | atomic_t ioerr_cnt; | |
192 | ||
ee959b00 TJ |
193 | struct device sdev_gendev, |
194 | sdev_dev; | |
1da177e4 | 195 | |
ffedb452 | 196 | struct execute_work ew; /* used to get process context on put */ |
9937a5e2 | 197 | struct work_struct requeue_work; |
ffedb452 | 198 | |
ee14c674 CH |
199 | struct scsi_device_handler *handler; |
200 | void *handler_data; | |
201 | ||
1da177e4 LT |
202 | enum scsi_device_state sdev_state; |
203 | unsigned long sdev_data[0]; | |
204 | } __attribute__((aligned(sizeof(unsigned long)))); | |
a6a8d9f8 | 205 | |
1da177e4 LT |
206 | #define to_scsi_device(d) \ |
207 | container_of(d, struct scsi_device, sdev_gendev) | |
208 | #define class_to_sdev(d) \ | |
ee959b00 | 209 | container_of(d, struct scsi_device, sdev_dev) |
1da177e4 | 210 | #define transport_class_to_sdev(class_dev) \ |
ee959b00 | 211 | to_scsi_device(class_dev->parent) |
1da177e4 | 212 | |
3af74a3c DW |
213 | #define sdev_dbg(sdev, fmt, a...) \ |
214 | dev_dbg(&(sdev)->sdev_gendev, fmt, ##a) | |
215 | ||
22e0d994 HR |
216 | /* |
217 | * like scmd_printk, but the device name is passed in | |
218 | * as a string pointer | |
219 | */ | |
9c4a6b1e | 220 | __printf(4, 5) void |
6a806cbc CH |
221 | sdev_prefix_printk(const char *, const struct scsi_device *, const char *, |
222 | const char *, ...); | |
ded85c19 HR |
223 | |
224 | #define sdev_printk(l, sdev, fmt, a...) \ | |
225 | sdev_prefix_printk(l, sdev, NULL, fmt, ##a) | |
226 | ||
9c4a6b1e | 227 | __printf(3, 4) void |
6a806cbc | 228 | scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...); |
01d7b3b8 | 229 | |
3af74a3c DW |
230 | #define scmd_dbg(scmd, fmt, a...) \ |
231 | do { \ | |
232 | if ((scmd)->request->rq_disk) \ | |
233 | sdev_dbg((scmd)->device, "[%s] " fmt, \ | |
234 | (scmd)->request->rq_disk->disk_name, ##a);\ | |
235 | else \ | |
236 | sdev_dbg((scmd)->device, fmt, ##a); \ | |
237 | } while (0) | |
238 | ||
ffedb452 | 239 | enum scsi_target_state { |
643eb2d9 JB |
240 | STARGET_CREATED = 1, |
241 | STARGET_RUNNING, | |
ffedb452 JB |
242 | STARGET_DEL, |
243 | }; | |
244 | ||
1da177e4 LT |
245 | /* |
246 | * scsi_target: representation of a scsi target, for now, this is only | |
247 | * used for single_lun devices. If no one has active IO to the target, | |
248 | * starget_sdev_user is NULL, else it points to the active sdev. | |
249 | */ | |
250 | struct scsi_target { | |
251 | struct scsi_device *starget_sdev_user; | |
252 | struct list_head siblings; | |
253 | struct list_head devices; | |
254 | struct device dev; | |
e63ed0d7 | 255 | struct kref reap_ref; /* last put renders target invisible */ |
1da177e4 LT |
256 | unsigned int channel; |
257 | unsigned int id; /* target id ... replace | |
258 | * scsi_device.id eventually */ | |
1bfc5d9d | 259 | unsigned int create:1; /* signal that it needs to be added */ |
25d7c363 TB |
260 | unsigned int single_lun:1; /* Indicates we should only |
261 | * allow I/O to one of the luns | |
262 | * for the device at a time. */ | |
de8c46bf AS |
263 | unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f |
264 | * means no lun present. */ | |
09b6b51b AS |
265 | unsigned int no_report_luns:1; /* Don't use |
266 | * REPORT LUNS for scanning. */ | |
279afdfe EM |
267 | unsigned int expecting_lun_change:1; /* A device has reported |
268 | * a 3F/0E UA, other devices on | |
269 | * the same target will also. */ | |
7ae65c0f CH |
270 | /* commands actually active on LLD. */ |
271 | atomic_t target_busy; | |
cd9070c9 CH |
272 | atomic_t target_blocked; |
273 | ||
f0c0a376 MC |
274 | /* |
275 | * LLDs should set this in the slave_alloc host template callout. | |
276 | * If set to zero then there is not limit. | |
277 | */ | |
278 | unsigned int can_queue; | |
f0c0a376 MC |
279 | unsigned int max_target_blocked; |
280 | #define SCSI_DEFAULT_TARGET_BLOCKED 3 | |
1bfc5d9d | 281 | |
6f3a2024 | 282 | char scsi_level; |
ffedb452 | 283 | enum scsi_target_state state; |
a283bd37 JB |
284 | void *hostdata; /* available to low-level driver */ |
285 | unsigned long starget_data[0]; /* for the transport */ | |
286 | /* starget_data must be the last element!!!! */ | |
1da177e4 LT |
287 | } __attribute__((aligned(sizeof(unsigned long)))); |
288 | ||
289 | #define to_scsi_target(d) container_of(d, struct scsi_target, dev) | |
290 | static inline struct scsi_target *scsi_target(struct scsi_device *sdev) | |
291 | { | |
292 | return to_scsi_target(sdev->sdev_gendev.parent); | |
293 | } | |
294 | #define transport_class_to_starget(class_dev) \ | |
ee959b00 | 295 | to_scsi_target(class_dev->parent) |
1da177e4 | 296 | |
9ccfc756 JB |
297 | #define starget_printk(prefix, starget, fmt, a...) \ |
298 | dev_printk(prefix, &(starget)->dev, fmt, ##a) | |
299 | ||
1da177e4 | 300 | extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, |
9cb78c16 | 301 | uint, uint, u64, void *hostdata); |
146f7262 | 302 | extern int scsi_add_device(struct Scsi_Host *host, uint channel, |
9cb78c16 | 303 | uint target, u64 lun); |
a6a8d9f8 | 304 | extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); |
1da177e4 | 305 | extern void scsi_remove_device(struct scsi_device *); |
a6a8d9f8 | 306 | extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); |
b3ae8780 | 307 | void scsi_attach_vpd(struct scsi_device *sdev); |
1da177e4 LT |
308 | |
309 | extern int scsi_device_get(struct scsi_device *); | |
310 | extern void scsi_device_put(struct scsi_device *); | |
311 | extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, | |
9cb78c16 | 312 | uint, uint, u64); |
1da177e4 | 313 | extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, |
9cb78c16 | 314 | uint, uint, u64); |
1da177e4 | 315 | extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, |
9cb78c16 | 316 | u64); |
1da177e4 | 317 | extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, |
9cb78c16 | 318 | u64); |
1da177e4 LT |
319 | extern void starget_for_each_device(struct scsi_target *, void *, |
320 | void (*fn)(struct scsi_device *, void *)); | |
522939d4 MR |
321 | extern void __starget_for_each_device(struct scsi_target *, void *, |
322 | void (*fn)(struct scsi_device *, | |
323 | void *)); | |
1da177e4 LT |
324 | |
325 | /* only exposed to implement shost_for_each_device */ | |
326 | extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, | |
327 | struct scsi_device *); | |
328 | ||
329 | /** | |
3e082a91 MW |
330 | * shost_for_each_device - iterate over all devices of a host |
331 | * @sdev: the &struct scsi_device to use as a cursor | |
332 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 333 | * |
3e082a91 MW |
334 | * Iterator that returns each device attached to @shost. This loop |
335 | * takes a reference on each device and releases it at the end. If | |
336 | * you break out of the loop, you must call scsi_device_put(sdev). | |
1da177e4 LT |
337 | */ |
338 | #define shost_for_each_device(sdev, shost) \ | |
339 | for ((sdev) = __scsi_iterate_devices((shost), NULL); \ | |
340 | (sdev); \ | |
341 | (sdev) = __scsi_iterate_devices((shost), (sdev))) | |
342 | ||
343 | /** | |
3e082a91 MW |
344 | * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) |
345 | * @sdev: the &struct scsi_device to use as a cursor | |
346 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 347 | * |
3e082a91 MW |
348 | * Iterator that returns each device attached to @shost. It does _not_ |
349 | * take a reference on the scsi_device, so the whole loop must be | |
350 | * protected by shost->host_lock. | |
1da177e4 | 351 | * |
3e082a91 MW |
352 | * Note: The only reason to use this is because you need to access the |
353 | * device list in interrupt context. Otherwise you really want to use | |
354 | * shost_for_each_device instead. | |
1da177e4 LT |
355 | */ |
356 | #define __shost_for_each_device(sdev, shost) \ | |
357 | list_for_each_entry((sdev), &((shost)->__devices), siblings) | |
358 | ||
db5ed4df | 359 | extern int scsi_change_queue_depth(struct scsi_device *, int); |
1da177e4 LT |
360 | extern int scsi_track_queue_full(struct scsi_device *, int); |
361 | ||
362 | extern int scsi_set_medium_removal(struct scsi_device *, char); | |
363 | ||
364 | extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, | |
365 | unsigned char *buffer, int len, int timeout, | |
1cf72699 | 366 | int retries, struct scsi_mode_data *data, |
ea73a9f2 | 367 | struct scsi_sense_hdr *); |
5baba830 JB |
368 | extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, |
369 | int modepage, unsigned char *buffer, int len, | |
370 | int timeout, int retries, | |
371 | struct scsi_mode_data *data, | |
372 | struct scsi_sense_hdr *); | |
1da177e4 | 373 | extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, |
001aac25 | 374 | int retries, struct scsi_sense_hdr *sshdr); |
e3deec09 JB |
375 | extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, |
376 | int buf_len); | |
3c6bdaea MP |
377 | extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, |
378 | unsigned int len, unsigned char opcode); | |
1da177e4 LT |
379 | extern int scsi_device_set_state(struct scsi_device *sdev, |
380 | enum scsi_device_state state); | |
a341cd0f JG |
381 | extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, |
382 | gfp_t gfpflags); | |
383 | extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); | |
384 | extern void sdev_evt_send_simple(struct scsi_device *sdev, | |
385 | enum scsi_device_event evt_type, gfp_t gfpflags); | |
1da177e4 LT |
386 | extern int scsi_device_quiesce(struct scsi_device *sdev); |
387 | extern void scsi_device_resume(struct scsi_device *sdev); | |
388 | extern void scsi_target_quiesce(struct scsi_target *); | |
389 | extern void scsi_target_resume(struct scsi_target *); | |
390 | extern void scsi_scan_target(struct device *parent, unsigned int channel, | |
9cb78c16 | 391 | unsigned int id, u64 lun, int rescan); |
1da177e4 LT |
392 | extern void scsi_target_reap(struct scsi_target *); |
393 | extern void scsi_target_block(struct device *); | |
5d9fb5cc | 394 | extern void scsi_target_unblock(struct device *, enum scsi_device_state); |
1da177e4 LT |
395 | extern void scsi_remove_target(struct device *); |
396 | extern const char *scsi_device_state_name(enum scsi_device_state); | |
397 | extern int scsi_is_sdev_device(const struct device *); | |
398 | extern int scsi_is_target_device(const struct device *); | |
33aa687d JB |
399 | extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, |
400 | int data_direction, void *buffer, unsigned bufflen, | |
401 | unsigned char *sense, int timeout, int retries, | |
2bfad21e | 402 | u64 flags, int *resid); |
9b21493c LM |
403 | extern int scsi_execute_req_flags(struct scsi_device *sdev, |
404 | const unsigned char *cmd, int data_direction, void *buffer, | |
405 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, | |
2bfad21e | 406 | int retries, int *resid, u64 flags); |
9b21493c LM |
407 | static inline int scsi_execute_req(struct scsi_device *sdev, |
408 | const unsigned char *cmd, int data_direction, void *buffer, | |
409 | unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, | |
410 | int retries, int *resid) | |
411 | { | |
412 | return scsi_execute_req_flags(sdev, cmd, data_direction, buffer, | |
413 | bufflen, sshdr, timeout, retries, resid, 0); | |
414 | } | |
6f4c827e AL |
415 | extern void sdev_disable_disk_events(struct scsi_device *sdev); |
416 | extern void sdev_enable_disk_events(struct scsi_device *sdev); | |
33aa687d | 417 | |
4f7ad521 | 418 | #ifdef CONFIG_PM |
bc4f2401 AS |
419 | extern int scsi_autopm_get_device(struct scsi_device *); |
420 | extern void scsi_autopm_put_device(struct scsi_device *); | |
421 | #else | |
422 | static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } | |
423 | static inline void scsi_autopm_put_device(struct scsi_device *d) {} | |
4f7ad521 | 424 | #endif /* CONFIG_PM */ |
bc4f2401 | 425 | |
cb5d9e09 | 426 | static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) |
e28482c5 | 427 | { |
cb5d9e09 | 428 | return device_reprobe(&sdev->sdev_gendev); |
e28482c5 JB |
429 | } |
430 | ||
01d7b3b8 JG |
431 | static inline unsigned int sdev_channel(struct scsi_device *sdev) |
432 | { | |
433 | return sdev->channel; | |
434 | } | |
435 | ||
436 | static inline unsigned int sdev_id(struct scsi_device *sdev) | |
437 | { | |
438 | return sdev->id; | |
439 | } | |
440 | ||
441 | #define scmd_id(scmd) sdev_id((scmd)->device) | |
442 | #define scmd_channel(scmd) sdev_channel((scmd)->device) | |
443 | ||
0f1d87a2 JB |
444 | /* |
445 | * checks for positions of the SCSI state machine | |
446 | */ | |
1da177e4 LT |
447 | static inline int scsi_device_online(struct scsi_device *sdev) |
448 | { | |
0762a482 | 449 | return (sdev->sdev_state != SDEV_OFFLINE && |
1b8d2620 | 450 | sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && |
0762a482 | 451 | sdev->sdev_state != SDEV_DEL); |
1da177e4 | 452 | } |
0f1d87a2 JB |
453 | static inline int scsi_device_blocked(struct scsi_device *sdev) |
454 | { | |
6f4267e3 JB |
455 | return sdev->sdev_state == SDEV_BLOCK || |
456 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 JB |
457 | } |
458 | static inline int scsi_device_created(struct scsi_device *sdev) | |
459 | { | |
6f4267e3 JB |
460 | return sdev->sdev_state == SDEV_CREATED || |
461 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 | 462 | } |
1da177e4 LT |
463 | |
464 | /* accessor functions for the SCSI parameters */ | |
465 | static inline int scsi_device_sync(struct scsi_device *sdev) | |
466 | { | |
467 | return sdev->sdtr; | |
468 | } | |
469 | static inline int scsi_device_wide(struct scsi_device *sdev) | |
470 | { | |
471 | return sdev->wdtr; | |
472 | } | |
473 | static inline int scsi_device_dt(struct scsi_device *sdev) | |
474 | { | |
475 | return sdev->ppr; | |
476 | } | |
477 | static inline int scsi_device_dt_only(struct scsi_device *sdev) | |
478 | { | |
479 | if (sdev->inquiry_len < 57) | |
480 | return 0; | |
481 | return (sdev->inquiry[56] & 0x0c) == 0x04; | |
482 | } | |
483 | static inline int scsi_device_ius(struct scsi_device *sdev) | |
484 | { | |
485 | if (sdev->inquiry_len < 57) | |
486 | return 0; | |
487 | return sdev->inquiry[56] & 0x01; | |
488 | } | |
489 | static inline int scsi_device_qas(struct scsi_device *sdev) | |
490 | { | |
491 | if (sdev->inquiry_len < 57) | |
492 | return 0; | |
493 | return sdev->inquiry[56] & 0x02; | |
494 | } | |
b30c2fc1 JB |
495 | static inline int scsi_device_enclosure(struct scsi_device *sdev) |
496 | { | |
d1e12de8 | 497 | return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; |
b30c2fc1 | 498 | } |
d7b8bcb0 | 499 | |
7027ad72 MP |
500 | static inline int scsi_device_protection(struct scsi_device *sdev) |
501 | { | |
d974e426 MP |
502 | if (sdev->no_dif) |
503 | return 0; | |
504 | ||
d211f052 | 505 | return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); |
7027ad72 MP |
506 | } |
507 | ||
d7c48feb HR |
508 | static inline int scsi_device_tpgs(struct scsi_device *sdev) |
509 | { | |
510 | return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; | |
511 | } | |
512 | ||
d7b8bcb0 MT |
513 | #define MODULE_ALIAS_SCSI_DEVICE(type) \ |
514 | MODULE_ALIAS("scsi:t-" __stringify(type) "*") | |
515 | #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" | |
516 | ||
1da177e4 | 517 | #endif /* _SCSI_SCSI_DEVICE_H */ |