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 */ | |
6f4267e3 JB |
45 | SDEV_BLOCK, /* Device blocked by scsi lld. No |
46 | * scsi commands from user or midlayer | |
47 | * should be issued to the scsi | |
48 | * lld. */ | |
49 | SDEV_CREATED_BLOCK, /* same as above but for created devices */ | |
1da177e4 LT |
50 | }; |
51 | ||
a341cd0f JG |
52 | enum scsi_device_event { |
53 | SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */ | |
54 | ||
55 | SDEV_EVT_LAST = SDEV_EVT_MEDIA_CHANGE, | |
56 | SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1 | |
57 | }; | |
58 | ||
59 | struct scsi_event { | |
60 | enum scsi_device_event evt_type; | |
61 | struct list_head node; | |
62 | ||
63 | /* put union of data structures, for non-simple event types, | |
64 | * here | |
65 | */ | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | struct scsi_device { |
69 | struct Scsi_Host *host; | |
70 | struct request_queue *request_queue; | |
71 | ||
72 | /* the next two are protected by the host->host_lock */ | |
73 | struct list_head siblings; /* list of all devices on this host */ | |
74 | struct list_head same_target_siblings; /* just the devices sharing same target id */ | |
75 | ||
c2a9331c | 76 | /* this is now protected by the request_queue->queue_lock */ |
06f81ea8 | 77 | unsigned int device_busy; /* commands actually active on |
78 | * low-level. protected by queue_lock. */ | |
1da177e4 LT |
79 | spinlock_t list_lock; |
80 | struct list_head cmd_list; /* queue of in use SCSI Command structures */ | |
81 | struct list_head starved_entry; | |
82 | struct scsi_cmnd *current_cmnd; /* currently active command */ | |
83 | unsigned short queue_depth; /* How deep of a queue we want */ | |
4a84067d | 84 | unsigned short max_queue_depth; /* max queue depth */ |
1da177e4 LT |
85 | unsigned short last_queue_full_depth; /* These two are used by */ |
86 | unsigned short last_queue_full_count; /* scsi_track_queue_full() */ | |
4a84067d VD |
87 | unsigned long last_queue_full_time; /* last queue full time */ |
88 | unsigned long queue_ramp_up_period; /* ramp up period in jiffies */ | |
89 | #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ) | |
90 | ||
91 | unsigned long last_queue_ramp_up; /* last queue ramp up time */ | |
1da177e4 LT |
92 | |
93 | unsigned int id, lun, channel; | |
94 | ||
95 | unsigned int manufacturer; /* Manufacturer of device, for using | |
96 | * vendor-specific cmd's */ | |
97 | unsigned sector_size; /* size in bytes */ | |
98 | ||
99 | void *hostdata; /* available to low-level driver */ | |
1da177e4 LT |
100 | char type; |
101 | char scsi_level; | |
102 | char inq_periph_qual; /* PQ from INQUIRY data */ | |
103 | unsigned char inquiry_len; /* valid bytes in 'inquiry' */ | |
104 | unsigned char * inquiry; /* INQUIRY response data */ | |
7f23e146 JB |
105 | const char * vendor; /* [back_compat] point into 'inquiry' ... */ |
106 | const char * model; /* ... after scan; point to static string */ | |
107 | const char * rev; /* ... "nullnullnullnull" before scan */ | |
1da177e4 LT |
108 | unsigned char current_tag; /* current tag */ |
109 | struct scsi_target *sdev_target; /* used only for single_lun */ | |
110 | ||
111 | unsigned int sdev_bflags; /* black/white flags as also found in | |
112 | * scsi_devinfo.[hc]. For now used only to | |
113 | * pass settings from slave_alloc to scsi | |
114 | * core. */ | |
115 | unsigned writeable:1; | |
116 | unsigned removable:1; | |
117 | unsigned changed:1; /* Data invalid due to media change */ | |
118 | unsigned busy:1; /* Used to prevent races */ | |
119 | unsigned lockable:1; /* Able to prevent media removal */ | |
120 | unsigned locked:1; /* Media removal disabled */ | |
121 | unsigned borken:1; /* Tell the Seagate driver to be | |
122 | * painfully slow on this device */ | |
123 | unsigned disconnect:1; /* can disconnect */ | |
124 | unsigned soft_reset:1; /* Uses soft reset option */ | |
125 | unsigned sdtr:1; /* Device supports SDTR messages */ | |
126 | unsigned wdtr:1; /* Device supports WDTR messages */ | |
127 | unsigned ppr:1; /* Device supports PPR messages */ | |
128 | unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ | |
129 | unsigned simple_tags:1; /* simple queue tag messages are enabled */ | |
130 | unsigned ordered_tags:1;/* ordered queue tag messages are enabled */ | |
1da177e4 LT |
131 | unsigned was_reset:1; /* There was a bus reset on the bus for |
132 | * this device */ | |
133 | unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN | |
134 | * because we did a bus reset. */ | |
135 | unsigned use_10_for_rw:1; /* first try 10-byte read / write */ | |
136 | unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ | |
137 | unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ | |
138 | unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ | |
09b6b51b | 139 | unsigned skip_vpd_pages:1; /* do not read VPD pages */ |
1da177e4 LT |
140 | unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ |
141 | unsigned no_start_on_add:1; /* do not issue start on add */ | |
142 | unsigned allow_restart:1; /* issue START_UNIT in error handler */ | |
c3c94c5a | 143 | unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ |
d2886ea3 | 144 | unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ |
1da177e4 LT |
145 | unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ |
146 | unsigned select_no_atn:1; | |
147 | unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ | |
61bf54b7 | 148 | unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ |
1da177e4 | 149 | unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ |
18351070 LT |
150 | unsigned last_sector_bug:1; /* do not use multisector accesses on |
151 | SD_LAST_BUGGY_SECTORS */ | |
8e04d805 | 152 | unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */ |
5ce524bd | 153 | unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */ |
860dc736 | 154 | unsigned is_visible:1; /* is the device visible in sysfs */ |
1da177e4 | 155 | |
a341cd0f JG |
156 | DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ |
157 | struct list_head event_list; /* asserted events */ | |
158 | struct work_struct event_work; | |
159 | ||
1da177e4 LT |
160 | unsigned int device_blocked; /* Device returned QUEUE_FULL. */ |
161 | ||
162 | unsigned int max_device_blocked; /* what device_blocked counts down from */ | |
163 | #define SCSI_DEFAULT_DEVICE_BLOCKED 3 | |
164 | ||
165 | atomic_t iorequest_cnt; | |
166 | atomic_t iodone_cnt; | |
167 | atomic_t ioerr_cnt; | |
168 | ||
ee959b00 TJ |
169 | struct device sdev_gendev, |
170 | sdev_dev; | |
1da177e4 | 171 | |
ffedb452 | 172 | struct execute_work ew; /* used to get process context on put */ |
9937a5e2 | 173 | struct work_struct requeue_work; |
ffedb452 | 174 | |
a6a8d9f8 | 175 | struct scsi_dh_data *scsi_dh_data; |
1da177e4 LT |
176 | enum scsi_device_state sdev_state; |
177 | unsigned long sdev_data[0]; | |
178 | } __attribute__((aligned(sizeof(unsigned long)))); | |
a6a8d9f8 | 179 | |
765cbc6d HR |
180 | struct scsi_dh_devlist { |
181 | char *vendor; | |
182 | char *model; | |
183 | }; | |
184 | ||
3ae31f6a | 185 | typedef void (*activate_complete)(void *, int); |
a6a8d9f8 CS |
186 | struct scsi_device_handler { |
187 | /* Used by the infrastructure */ | |
188 | struct list_head list; /* list of scsi_device_handlers */ | |
a6a8d9f8 CS |
189 | |
190 | /* Filled by the hardware handler */ | |
191 | struct module *module; | |
192 | const char *name; | |
765cbc6d | 193 | const struct scsi_dh_devlist *devlist; |
a6a8d9f8 | 194 | int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *); |
765cbc6d HR |
195 | int (*attach)(struct scsi_device *); |
196 | void (*detach)(struct scsi_device *); | |
3ae31f6a | 197 | int (*activate)(struct scsi_device *, activate_complete, void *); |
a6a8d9f8 | 198 | int (*prep_fn)(struct scsi_device *, struct request *); |
18ee70c9 | 199 | int (*set_params)(struct scsi_device *, const char *); |
6c3633d0 | 200 | bool (*match)(struct scsi_device *); |
a6a8d9f8 CS |
201 | }; |
202 | ||
203 | struct scsi_dh_data { | |
204 | struct scsi_device_handler *scsi_dh; | |
6c10db72 CS |
205 | struct scsi_device *sdev; |
206 | struct kref kref; | |
a6a8d9f8 CS |
207 | char buf[0]; |
208 | }; | |
209 | ||
1da177e4 LT |
210 | #define to_scsi_device(d) \ |
211 | container_of(d, struct scsi_device, sdev_gendev) | |
212 | #define class_to_sdev(d) \ | |
ee959b00 | 213 | container_of(d, struct scsi_device, sdev_dev) |
1da177e4 | 214 | #define transport_class_to_sdev(class_dev) \ |
ee959b00 | 215 | to_scsi_device(class_dev->parent) |
1da177e4 | 216 | |
9ccfc756 JB |
217 | #define sdev_printk(prefix, sdev, fmt, a...) \ |
218 | dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a) | |
219 | ||
a4d04a4c MP |
220 | #define scmd_printk(prefix, scmd, fmt, a...) \ |
221 | (scmd)->request->rq_disk ? \ | |
222 | sdev_printk(prefix, (scmd)->device, "[%s] " fmt, \ | |
223 | (scmd)->request->rq_disk->disk_name, ##a) : \ | |
224 | sdev_printk(prefix, (scmd)->device, fmt, ##a) | |
01d7b3b8 | 225 | |
ffedb452 | 226 | enum scsi_target_state { |
643eb2d9 JB |
227 | STARGET_CREATED = 1, |
228 | STARGET_RUNNING, | |
ffedb452 JB |
229 | STARGET_DEL, |
230 | }; | |
231 | ||
1da177e4 LT |
232 | /* |
233 | * scsi_target: representation of a scsi target, for now, this is only | |
234 | * used for single_lun devices. If no one has active IO to the target, | |
235 | * starget_sdev_user is NULL, else it points to the active sdev. | |
236 | */ | |
237 | struct scsi_target { | |
238 | struct scsi_device *starget_sdev_user; | |
239 | struct list_head siblings; | |
240 | struct list_head devices; | |
241 | struct device dev; | |
242 | unsigned int reap_ref; /* protected by the host lock */ | |
243 | unsigned int channel; | |
244 | unsigned int id; /* target id ... replace | |
245 | * scsi_device.id eventually */ | |
1bfc5d9d | 246 | unsigned int create:1; /* signal that it needs to be added */ |
25d7c363 TB |
247 | unsigned int single_lun:1; /* Indicates we should only |
248 | * allow I/O to one of the luns | |
249 | * for the device at a time. */ | |
de8c46bf AS |
250 | unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f |
251 | * means no lun present. */ | |
09b6b51b AS |
252 | unsigned int no_report_luns:1; /* Don't use |
253 | * REPORT LUNS for scanning. */ | |
f0c0a376 MC |
254 | /* commands actually active on LLD. protected by host lock. */ |
255 | unsigned int target_busy; | |
256 | /* | |
257 | * LLDs should set this in the slave_alloc host template callout. | |
258 | * If set to zero then there is not limit. | |
259 | */ | |
260 | unsigned int can_queue; | |
261 | unsigned int target_blocked; | |
262 | unsigned int max_target_blocked; | |
263 | #define SCSI_DEFAULT_TARGET_BLOCKED 3 | |
1bfc5d9d | 264 | |
6f3a2024 | 265 | char scsi_level; |
ffedb452 JB |
266 | struct execute_work ew; |
267 | enum scsi_target_state state; | |
a283bd37 JB |
268 | void *hostdata; /* available to low-level driver */ |
269 | unsigned long starget_data[0]; /* for the transport */ | |
270 | /* starget_data must be the last element!!!! */ | |
1da177e4 LT |
271 | } __attribute__((aligned(sizeof(unsigned long)))); |
272 | ||
273 | #define to_scsi_target(d) container_of(d, struct scsi_target, dev) | |
274 | static inline struct scsi_target *scsi_target(struct scsi_device *sdev) | |
275 | { | |
276 | return to_scsi_target(sdev->sdev_gendev.parent); | |
277 | } | |
278 | #define transport_class_to_starget(class_dev) \ | |
ee959b00 | 279 | to_scsi_target(class_dev->parent) |
1da177e4 | 280 | |
9ccfc756 JB |
281 | #define starget_printk(prefix, starget, fmt, a...) \ |
282 | dev_printk(prefix, &(starget)->dev, fmt, ##a) | |
283 | ||
1da177e4 LT |
284 | extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, |
285 | uint, uint, uint, void *hostdata); | |
146f7262 JB |
286 | extern int scsi_add_device(struct Scsi_Host *host, uint channel, |
287 | uint target, uint lun); | |
a6a8d9f8 | 288 | extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); |
1da177e4 | 289 | extern void scsi_remove_device(struct scsi_device *); |
a6a8d9f8 | 290 | extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); |
1da177e4 LT |
291 | |
292 | extern int scsi_device_get(struct scsi_device *); | |
293 | extern void scsi_device_put(struct scsi_device *); | |
294 | extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, | |
295 | uint, uint, uint); | |
296 | extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, | |
297 | uint, uint, uint); | |
298 | extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, | |
299 | uint); | |
300 | extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, | |
301 | uint); | |
302 | extern void starget_for_each_device(struct scsi_target *, void *, | |
303 | void (*fn)(struct scsi_device *, void *)); | |
522939d4 MR |
304 | extern void __starget_for_each_device(struct scsi_target *, void *, |
305 | void (*fn)(struct scsi_device *, | |
306 | void *)); | |
1da177e4 LT |
307 | |
308 | /* only exposed to implement shost_for_each_device */ | |
309 | extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, | |
310 | struct scsi_device *); | |
311 | ||
312 | /** | |
3e082a91 MW |
313 | * shost_for_each_device - iterate over all devices of a host |
314 | * @sdev: the &struct scsi_device to use as a cursor | |
315 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 316 | * |
3e082a91 MW |
317 | * Iterator that returns each device attached to @shost. This loop |
318 | * takes a reference on each device and releases it at the end. If | |
319 | * you break out of the loop, you must call scsi_device_put(sdev). | |
1da177e4 LT |
320 | */ |
321 | #define shost_for_each_device(sdev, shost) \ | |
322 | for ((sdev) = __scsi_iterate_devices((shost), NULL); \ | |
323 | (sdev); \ | |
324 | (sdev) = __scsi_iterate_devices((shost), (sdev))) | |
325 | ||
326 | /** | |
3e082a91 MW |
327 | * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) |
328 | * @sdev: the &struct scsi_device to use as a cursor | |
329 | * @shost: the &struct scsi_host to iterate over | |
1da177e4 | 330 | * |
3e082a91 MW |
331 | * Iterator that returns each device attached to @shost. It does _not_ |
332 | * take a reference on the scsi_device, so the whole loop must be | |
333 | * protected by shost->host_lock. | |
1da177e4 | 334 | * |
3e082a91 MW |
335 | * Note: The only reason to use this is because you need to access the |
336 | * device list in interrupt context. Otherwise you really want to use | |
337 | * shost_for_each_device instead. | |
1da177e4 LT |
338 | */ |
339 | #define __shost_for_each_device(sdev, shost) \ | |
340 | list_for_each_entry((sdev), &((shost)->__devices), siblings) | |
341 | ||
342 | extern void scsi_adjust_queue_depth(struct scsi_device *, int, int); | |
343 | extern int scsi_track_queue_full(struct scsi_device *, int); | |
344 | ||
345 | extern int scsi_set_medium_removal(struct scsi_device *, char); | |
346 | ||
347 | extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, | |
348 | unsigned char *buffer, int len, int timeout, | |
1cf72699 | 349 | int retries, struct scsi_mode_data *data, |
ea73a9f2 | 350 | struct scsi_sense_hdr *); |
5baba830 JB |
351 | extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, |
352 | int modepage, unsigned char *buffer, int len, | |
353 | int timeout, int retries, | |
354 | struct scsi_mode_data *data, | |
355 | struct scsi_sense_hdr *); | |
1da177e4 | 356 | extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, |
001aac25 | 357 | int retries, struct scsi_sense_hdr *sshdr); |
e3deec09 JB |
358 | extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, |
359 | int buf_len); | |
1da177e4 LT |
360 | extern int scsi_device_set_state(struct scsi_device *sdev, |
361 | enum scsi_device_state state); | |
a341cd0f JG |
362 | extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, |
363 | gfp_t gfpflags); | |
364 | extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); | |
365 | extern void sdev_evt_send_simple(struct scsi_device *sdev, | |
366 | enum scsi_device_event evt_type, gfp_t gfpflags); | |
1da177e4 LT |
367 | extern int scsi_device_quiesce(struct scsi_device *sdev); |
368 | extern void scsi_device_resume(struct scsi_device *sdev); | |
369 | extern void scsi_target_quiesce(struct scsi_target *); | |
370 | extern void scsi_target_resume(struct scsi_target *); | |
371 | extern void scsi_scan_target(struct device *parent, unsigned int channel, | |
372 | unsigned int id, unsigned int lun, int rescan); | |
373 | extern void scsi_target_reap(struct scsi_target *); | |
374 | extern void scsi_target_block(struct device *); | |
375 | extern void scsi_target_unblock(struct device *); | |
376 | extern void scsi_remove_target(struct device *); | |
2f4701d8 | 377 | extern void int_to_scsilun(unsigned int, struct scsi_lun *); |
462b7859 | 378 | extern int scsilun_to_int(struct scsi_lun *); |
1da177e4 LT |
379 | extern const char *scsi_device_state_name(enum scsi_device_state); |
380 | extern int scsi_is_sdev_device(const struct device *); | |
381 | extern int scsi_is_target_device(const struct device *); | |
33aa687d JB |
382 | extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, |
383 | int data_direction, void *buffer, unsigned bufflen, | |
384 | unsigned char *sense, int timeout, int retries, | |
f4f4e47e | 385 | int flag, int *resid); |
ea73a9f2 JB |
386 | extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd, |
387 | int data_direction, void *buffer, unsigned bufflen, | |
f4f4e47e FT |
388 | struct scsi_sense_hdr *, int timeout, int retries, |
389 | int *resid); | |
33aa687d | 390 | |
bc4f2401 AS |
391 | #ifdef CONFIG_PM_RUNTIME |
392 | extern int scsi_autopm_get_device(struct scsi_device *); | |
393 | extern void scsi_autopm_put_device(struct scsi_device *); | |
394 | #else | |
395 | static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } | |
396 | static inline void scsi_autopm_put_device(struct scsi_device *d) {} | |
397 | #endif /* CONFIG_PM_RUNTIME */ | |
398 | ||
cb5d9e09 | 399 | static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) |
e28482c5 | 400 | { |
cb5d9e09 | 401 | return device_reprobe(&sdev->sdev_gendev); |
e28482c5 JB |
402 | } |
403 | ||
01d7b3b8 JG |
404 | static inline unsigned int sdev_channel(struct scsi_device *sdev) |
405 | { | |
406 | return sdev->channel; | |
407 | } | |
408 | ||
409 | static inline unsigned int sdev_id(struct scsi_device *sdev) | |
410 | { | |
411 | return sdev->id; | |
412 | } | |
413 | ||
414 | #define scmd_id(scmd) sdev_id((scmd)->device) | |
415 | #define scmd_channel(scmd) sdev_channel((scmd)->device) | |
416 | ||
0f1d87a2 JB |
417 | /* |
418 | * checks for positions of the SCSI state machine | |
419 | */ | |
1da177e4 LT |
420 | static inline int scsi_device_online(struct scsi_device *sdev) |
421 | { | |
0762a482 HR |
422 | return (sdev->sdev_state != SDEV_OFFLINE && |
423 | sdev->sdev_state != SDEV_DEL); | |
1da177e4 | 424 | } |
0f1d87a2 JB |
425 | static inline int scsi_device_blocked(struct scsi_device *sdev) |
426 | { | |
6f4267e3 JB |
427 | return sdev->sdev_state == SDEV_BLOCK || |
428 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 JB |
429 | } |
430 | static inline int scsi_device_created(struct scsi_device *sdev) | |
431 | { | |
6f4267e3 JB |
432 | return sdev->sdev_state == SDEV_CREATED || |
433 | sdev->sdev_state == SDEV_CREATED_BLOCK; | |
0f1d87a2 | 434 | } |
1da177e4 LT |
435 | |
436 | /* accessor functions for the SCSI parameters */ | |
437 | static inline int scsi_device_sync(struct scsi_device *sdev) | |
438 | { | |
439 | return sdev->sdtr; | |
440 | } | |
441 | static inline int scsi_device_wide(struct scsi_device *sdev) | |
442 | { | |
443 | return sdev->wdtr; | |
444 | } | |
445 | static inline int scsi_device_dt(struct scsi_device *sdev) | |
446 | { | |
447 | return sdev->ppr; | |
448 | } | |
449 | static inline int scsi_device_dt_only(struct scsi_device *sdev) | |
450 | { | |
451 | if (sdev->inquiry_len < 57) | |
452 | return 0; | |
453 | return (sdev->inquiry[56] & 0x0c) == 0x04; | |
454 | } | |
455 | static inline int scsi_device_ius(struct scsi_device *sdev) | |
456 | { | |
457 | if (sdev->inquiry_len < 57) | |
458 | return 0; | |
459 | return sdev->inquiry[56] & 0x01; | |
460 | } | |
461 | static inline int scsi_device_qas(struct scsi_device *sdev) | |
462 | { | |
463 | if (sdev->inquiry_len < 57) | |
464 | return 0; | |
465 | return sdev->inquiry[56] & 0x02; | |
466 | } | |
b30c2fc1 JB |
467 | static inline int scsi_device_enclosure(struct scsi_device *sdev) |
468 | { | |
d1e12de8 | 469 | return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; |
b30c2fc1 | 470 | } |
d7b8bcb0 | 471 | |
7027ad72 MP |
472 | static inline int scsi_device_protection(struct scsi_device *sdev) |
473 | { | |
d211f052 | 474 | return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); |
7027ad72 MP |
475 | } |
476 | ||
d7c48feb HR |
477 | static inline int scsi_device_tpgs(struct scsi_device *sdev) |
478 | { | |
479 | return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; | |
480 | } | |
481 | ||
d7b8bcb0 MT |
482 | #define MODULE_ALIAS_SCSI_DEVICE(type) \ |
483 | MODULE_ALIAS("scsi:t-" __stringify(type) "*") | |
484 | #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" | |
485 | ||
1da177e4 | 486 | #endif /* _SCSI_SCSI_DEVICE_H */ |