1#ifndef _SCSI_SCSI_DEVICE_H
2#define _SCSI_SCSI_DEVICE_H
3
4#include <linux/device.h>
5#include <linux/list.h>
6#include <linux/spinlock.h>
7#include <linux/workqueue.h>
8#include <linux/blkdev.h>
9#include <scsi/scsi.h>
10#include <asm/atomic.h>
11
12struct request_queue;
13struct scsi_cmnd;
14struct scsi_lun;
15struct scsi_sense_hdr;
16
17struct 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
26
27
28
29
30
31enum scsi_device_state {
32 SDEV_CREATED = 1,
33
34 SDEV_RUNNING,
35
36 SDEV_CANCEL,
37
38 SDEV_DEL,
39
40 SDEV_QUIESCE,
41
42
43 SDEV_OFFLINE,
44
45 SDEV_BLOCK,
46
47
48
49 SDEV_CREATED_BLOCK,
50};
51
52enum scsi_device_event {
53 SDEV_EVT_MEDIA_CHANGE = 1,
54
55 SDEV_EVT_LAST = SDEV_EVT_MEDIA_CHANGE,
56 SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1
57};
58
59struct scsi_event {
60 enum scsi_device_event evt_type;
61 struct list_head node;
62
63
64
65
66};
67
68struct scsi_device {
69 struct Scsi_Host *host;
70 struct request_queue *request_queue;
71
72
73 struct list_head siblings;
74 struct list_head same_target_siblings;
75
76
77 unsigned int device_busy;
78
79 spinlock_t list_lock;
80 struct list_head cmd_list;
81 struct list_head starved_entry;
82 struct scsi_cmnd *current_cmnd;
83 unsigned short queue_depth;
84 unsigned short max_queue_depth;
85 unsigned short last_queue_full_depth;
86 unsigned short last_queue_full_count;
87 unsigned long last_queue_full_time;
88 unsigned long queue_ramp_up_period;
89#define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ)
90
91 unsigned long last_queue_ramp_up;
92
93 unsigned int id, lun, channel;
94
95 unsigned int manufacturer;
96
97 unsigned sector_size;
98
99 void *hostdata;
100 char type;
101 char scsi_level;
102 char inq_periph_qual;
103 unsigned char inquiry_len;
104 unsigned char * inquiry;
105 const char * vendor;
106 const char * model;
107 const char * rev;
108 unsigned char current_tag;
109 struct scsi_target *sdev_target;
110
111 unsigned int sdev_bflags;
112
113
114
115 unsigned writeable:1;
116 unsigned removable:1;
117 unsigned changed:1;
118 unsigned busy:1;
119 unsigned lockable:1;
120 unsigned locked:1;
121 unsigned borken:1;
122
123 unsigned disconnect:1;
124 unsigned soft_reset:1;
125 unsigned sdtr:1;
126 unsigned wdtr:1;
127 unsigned ppr:1;
128 unsigned tagged_supported:1;
129 unsigned simple_tags:1;
130 unsigned ordered_tags:1;
131 unsigned was_reset:1;
132
133 unsigned expecting_cc_ua:1;
134
135 unsigned use_10_for_rw:1;
136 unsigned use_10_for_ms:1;
137 unsigned skip_ms_page_8:1;
138 unsigned skip_ms_page_3f:1;
139 unsigned use_192_bytes_for_3f:1;
140 unsigned no_start_on_add:1;
141 unsigned allow_restart:1;
142 unsigned manage_start_stop:1;
143 unsigned start_stop_pwr_cond:1;
144 unsigned no_uld_attach:1;
145 unsigned select_no_atn:1;
146 unsigned fix_capacity:1;
147 unsigned guess_capacity:1;
148 unsigned retry_hwerror:1;
149 unsigned last_sector_bug:1;
150
151 unsigned no_read_disc_info:1;
152 unsigned no_read_capacity_16:1;
153 unsigned is_visible:1;
154
155 DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS);
156 struct list_head event_list;
157 struct work_struct event_work;
158
159 unsigned int device_blocked;
160
161 unsigned int max_device_blocked;
162#define SCSI_DEFAULT_DEVICE_BLOCKED 3
163
164 atomic_t iorequest_cnt;
165 atomic_t iodone_cnt;
166 atomic_t ioerr_cnt;
167
168 struct device sdev_gendev,
169 sdev_dev;
170
171 struct execute_work ew;
172
173 struct scsi_dh_data *scsi_dh_data;
174 enum scsi_device_state sdev_state;
175 unsigned long sdev_data[0];
176} __attribute__((aligned(sizeof(unsigned long))));
177
178struct scsi_dh_devlist {
179 char *vendor;
180 char *model;
181};
182
183typedef void (*activate_complete)(void *, int);
184struct scsi_device_handler {
185
186 struct list_head list;
187
188
189 struct module *module;
190 const char *name;
191 const struct scsi_dh_devlist *devlist;
192 int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
193 int (*attach)(struct scsi_device *);
194 void (*detach)(struct scsi_device *);
195 int (*activate)(struct scsi_device *, activate_complete, void *);
196 int (*prep_fn)(struct scsi_device *, struct request *);
197 int (*set_params)(struct scsi_device *, const char *);
198};
199
200struct scsi_dh_data {
201 struct scsi_device_handler *scsi_dh;
202 struct scsi_device *sdev;
203 struct kref kref;
204 char buf[0];
205};
206
207#define to_scsi_device(d) \
208 container_of(d, struct scsi_device, sdev_gendev)
209#define class_to_sdev(d) \
210 container_of(d, struct scsi_device, sdev_dev)
211#define transport_class_to_sdev(class_dev) \
212 to_scsi_device(class_dev->parent)
213
214#define sdev_printk(prefix, sdev, fmt, a...) \
215 dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
216
217#define scmd_printk(prefix, scmd, fmt, a...) \
218 (scmd)->request->rq_disk ? \
219 sdev_printk(prefix, (scmd)->device, "[%s] " fmt, \
220 (scmd)->request->rq_disk->disk_name, ##a) : \
221 sdev_printk(prefix, (scmd)->device, fmt, ##a)
222
223enum scsi_target_state {
224 STARGET_CREATED = 1,
225 STARGET_RUNNING,
226 STARGET_DEL,
227};
228
229
230
231
232
233
234struct scsi_target {
235 struct scsi_device *starget_sdev_user;
236 struct list_head siblings;
237 struct list_head devices;
238 struct device dev;
239 unsigned int reap_ref;
240 unsigned int channel;
241 unsigned int id;
242
243 unsigned int create:1;
244 unsigned int single_lun:1;
245
246
247 unsigned int pdt_1f_for_no_lun;
248
249
250 unsigned int target_busy;
251
252
253
254
255 unsigned int can_queue;
256 unsigned int target_blocked;
257 unsigned int max_target_blocked;
258#define SCSI_DEFAULT_TARGET_BLOCKED 3
259
260 char scsi_level;
261 struct execute_work ew;
262 enum scsi_target_state state;
263 void *hostdata;
264 unsigned long starget_data[0];
265
266} __attribute__((aligned(sizeof(unsigned long))));
267
268#define to_scsi_target(d) container_of(d, struct scsi_target, dev)
269static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
270{
271 return to_scsi_target(sdev->sdev_gendev.parent);
272}
273#define transport_class_to_starget(class_dev) \
274 to_scsi_target(class_dev->parent)
275
276#define starget_printk(prefix, starget, fmt, a...) \
277 dev_printk(prefix, &(starget)->dev, fmt, ##a)
278
279extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
280 uint, uint, uint, void *hostdata);
281extern int scsi_add_device(struct Scsi_Host *host, uint channel,
282 uint target, uint lun);
283extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);
284extern void scsi_remove_device(struct scsi_device *);
285extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);
286
287extern int scsi_device_get(struct scsi_device *);
288extern void scsi_device_put(struct scsi_device *);
289extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
290 uint, uint, uint);
291extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
292 uint, uint, uint);
293extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
294 uint);
295extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,
296 uint);
297extern void starget_for_each_device(struct scsi_target *, void *,
298 void (*fn)(struct scsi_device *, void *));
299extern void __starget_for_each_device(struct scsi_target *, void *,
300 void (*fn)(struct scsi_device *,
301 void *));
302
303
304extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
305 struct scsi_device *);
306
307
308
309
310
311
312
313
314
315
316#define shost_for_each_device(sdev, shost) \
317 for ((sdev) = __scsi_iterate_devices((shost), NULL); \
318 (sdev); \
319 (sdev) = __scsi_iterate_devices((shost), (sdev)))
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334#define __shost_for_each_device(sdev, shost) \
335 list_for_each_entry((sdev), &((shost)->__devices), siblings)
336
337extern void scsi_adjust_queue_depth(struct scsi_device *, int, int);
338extern int scsi_track_queue_full(struct scsi_device *, int);
339
340extern int scsi_set_medium_removal(struct scsi_device *, char);
341
342extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
343 unsigned char *buffer, int len, int timeout,
344 int retries, struct scsi_mode_data *data,
345 struct scsi_sense_hdr *);
346extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
347 int modepage, unsigned char *buffer, int len,
348 int timeout, int retries,
349 struct scsi_mode_data *data,
350 struct scsi_sense_hdr *);
351extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
352 int retries, struct scsi_sense_hdr *sshdr);
353extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf,
354 int buf_len);
355extern int scsi_device_set_state(struct scsi_device *sdev,
356 enum scsi_device_state state);
357extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
358 gfp_t gfpflags);
359extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt);
360extern void sdev_evt_send_simple(struct scsi_device *sdev,
361 enum scsi_device_event evt_type, gfp_t gfpflags);
362extern int scsi_device_quiesce(struct scsi_device *sdev);
363extern void scsi_device_resume(struct scsi_device *sdev);
364extern void scsi_target_quiesce(struct scsi_target *);
365extern void scsi_target_resume(struct scsi_target *);
366extern void scsi_scan_target(struct device *parent, unsigned int channel,
367 unsigned int id, unsigned int lun, int rescan);
368extern void scsi_target_reap(struct scsi_target *);
369extern void scsi_target_block(struct device *);
370extern void scsi_target_unblock(struct device *);
371extern void scsi_remove_target(struct device *);
372extern void int_to_scsilun(unsigned int, struct scsi_lun *);
373extern int scsilun_to_int(struct scsi_lun *);
374extern const char *scsi_device_state_name(enum scsi_device_state);
375extern int scsi_is_sdev_device(const struct device *);
376extern int scsi_is_target_device(const struct device *);
377extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
378 int data_direction, void *buffer, unsigned bufflen,
379 unsigned char *sense, int timeout, int retries,
380 int flag, int *resid);
381extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
382 int data_direction, void *buffer, unsigned bufflen,
383 struct scsi_sense_hdr *, int timeout, int retries,
384 int *resid);
385
386#ifdef CONFIG_PM_RUNTIME
387extern int scsi_autopm_get_device(struct scsi_device *);
388extern void scsi_autopm_put_device(struct scsi_device *);
389#else
390static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; }
391static inline void scsi_autopm_put_device(struct scsi_device *d) {}
392#endif
393
394static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)
395{
396 return device_reprobe(&sdev->sdev_gendev);
397}
398
399static inline unsigned int sdev_channel(struct scsi_device *sdev)
400{
401 return sdev->channel;
402}
403
404static inline unsigned int sdev_id(struct scsi_device *sdev)
405{
406 return sdev->id;
407}
408
409#define scmd_id(scmd) sdev_id((scmd)->device)
410#define scmd_channel(scmd) sdev_channel((scmd)->device)
411
412
413
414
415static inline int scsi_device_online(struct scsi_device *sdev)
416{
417 return (sdev->sdev_state != SDEV_OFFLINE &&
418 sdev->sdev_state != SDEV_DEL);
419}
420static inline int scsi_device_blocked(struct scsi_device *sdev)
421{
422 return sdev->sdev_state == SDEV_BLOCK ||
423 sdev->sdev_state == SDEV_CREATED_BLOCK;
424}
425static inline int scsi_device_created(struct scsi_device *sdev)
426{
427 return sdev->sdev_state == SDEV_CREATED ||
428 sdev->sdev_state == SDEV_CREATED_BLOCK;
429}
430
431
432static inline int scsi_device_sync(struct scsi_device *sdev)
433{
434 return sdev->sdtr;
435}
436static inline int scsi_device_wide(struct scsi_device *sdev)
437{
438 return sdev->wdtr;
439}
440static inline int scsi_device_dt(struct scsi_device *sdev)
441{
442 return sdev->ppr;
443}
444static inline int scsi_device_dt_only(struct scsi_device *sdev)
445{
446 if (sdev->inquiry_len < 57)
447 return 0;
448 return (sdev->inquiry[56] & 0x0c) == 0x04;
449}
450static inline int scsi_device_ius(struct scsi_device *sdev)
451{
452 if (sdev->inquiry_len < 57)
453 return 0;
454 return sdev->inquiry[56] & 0x01;
455}
456static inline int scsi_device_qas(struct scsi_device *sdev)
457{
458 if (sdev->inquiry_len < 57)
459 return 0;
460 return sdev->inquiry[56] & 0x02;
461}
462static inline int scsi_device_enclosure(struct scsi_device *sdev)
463{
464 return sdev->inquiry[6] & (1<<6);
465}
466
467static inline int scsi_device_protection(struct scsi_device *sdev)
468{
469 return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0);
470}
471
472#define MODULE_ALIAS_SCSI_DEVICE(type) \
473 MODULE_ALIAS("scsi:t-" __stringify(type) "*")
474#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
475
476#endif
477