4 * SCSI sysfs interface routines.
6 * Created to pull SCSI mid layer sysfs routines into one file.
9 #include <linux/module.h>
10 #include <linux/slab.h>
11 #include <linux/init.h>
12 #include <linux/blkdev.h>
13 #include <linux/device.h>
14 #include <linux/pm_runtime.h>
16 #include <scsi/scsi.h>
17 #include <scsi/scsi_device.h>
18 #include <scsi/scsi_host.h>
19 #include <scsi/scsi_tcq.h>
20 #include <scsi/scsi_transport.h>
21 #include <scsi/scsi_driver.h>
23 #include "scsi_priv.h"
24 #include "scsi_logging.h"
26 static struct device_type scsi_dev_type
;
29 enum scsi_device_state value
;
32 { SDEV_CREATED
, "created" },
33 { SDEV_RUNNING
, "running" },
34 { SDEV_CANCEL
, "cancel" },
35 { SDEV_DEL
, "deleted" },
36 { SDEV_QUIESCE
, "quiesce" },
37 { SDEV_OFFLINE
, "offline" },
38 { SDEV_BLOCK
, "blocked" },
39 { SDEV_CREATED_BLOCK
, "created-blocked" },
42 const char *scsi_device_state_name(enum scsi_device_state state
)
47 for (i
= 0; i
< ARRAY_SIZE(sdev_states
); i
++) {
48 if (sdev_states
[i
].value
== state
) {
49 name
= sdev_states
[i
].name
;
57 enum scsi_host_state value
;
60 { SHOST_CREATED
, "created" },
61 { SHOST_RUNNING
, "running" },
62 { SHOST_CANCEL
, "cancel" },
63 { SHOST_DEL
, "deleted" },
64 { SHOST_RECOVERY
, "recovery" },
65 { SHOST_CANCEL_RECOVERY
, "cancel/recovery" },
66 { SHOST_DEL_RECOVERY
, "deleted/recovery", },
68 const char *scsi_host_state_name(enum scsi_host_state state
)
73 for (i
= 0; i
< ARRAY_SIZE(shost_states
); i
++) {
74 if (shost_states
[i
].value
== state
) {
75 name
= shost_states
[i
].name
;
82 static int check_set(unsigned int *val
, char *src
)
86 if (strncmp(src
, "-", 20) == 0) {
87 *val
= SCAN_WILD_CARD
;
90 * Doesn't check for int overflow
92 *val
= simple_strtoul(src
, &last
, 0);
99 static int scsi_scan(struct Scsi_Host
*shost
, const char *str
)
101 char s1
[15], s2
[15], s3
[15], junk
;
102 unsigned int channel
, id
, lun
;
105 res
= sscanf(str
, "%10s %10s %10s %c", s1
, s2
, s3
, &junk
);
108 if (check_set(&channel
, s1
))
110 if (check_set(&id
, s2
))
112 if (check_set(&lun
, s3
))
114 if (shost
->transportt
->user_scan
)
115 res
= shost
->transportt
->user_scan(shost
, channel
, id
, lun
);
117 res
= scsi_scan_host_selected(shost
, channel
, id
, lun
, 1);
122 * shost_show_function: macro to create an attr function that can be used to
123 * show a non-bit field.
125 #define shost_show_function(name, field, format_string) \
127 show_##name (struct device *dev, struct device_attribute *attr, \
130 struct Scsi_Host *shost = class_to_shost(dev); \
131 return snprintf (buf, 20, format_string, shost->field); \
135 * shost_rd_attr: macro to create a function and attribute variable for a
138 #define shost_rd_attr2(name, field, format_string) \
139 shost_show_function(name, field, format_string) \
140 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
142 #define shost_rd_attr(field, format_string) \
143 shost_rd_attr2(field, field, format_string)
146 * Create the actual show/store functions and data structures.
150 store_scan(struct device
*dev
, struct device_attribute
*attr
,
151 const char *buf
, size_t count
)
153 struct Scsi_Host
*shost
= class_to_shost(dev
);
156 res
= scsi_scan(shost
, buf
);
161 static DEVICE_ATTR(scan
, S_IWUSR
, NULL
, store_scan
);
164 store_shost_state(struct device
*dev
, struct device_attribute
*attr
,
165 const char *buf
, size_t count
)
168 struct Scsi_Host
*shost
= class_to_shost(dev
);
169 enum scsi_host_state state
= 0;
171 for (i
= 0; i
< ARRAY_SIZE(shost_states
); i
++) {
172 const int len
= strlen(shost_states
[i
].name
);
173 if (strncmp(shost_states
[i
].name
, buf
, len
) == 0 &&
175 state
= shost_states
[i
].value
;
182 if (scsi_host_set_state(shost
, state
))
188 show_shost_state(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
190 struct Scsi_Host
*shost
= class_to_shost(dev
);
191 const char *name
= scsi_host_state_name(shost
->shost_state
);
196 return snprintf(buf
, 20, "%s\n", name
);
199 /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
200 struct device_attribute dev_attr_hstate
=
201 __ATTR(state
, S_IRUGO
| S_IWUSR
, show_shost_state
, store_shost_state
);
204 show_shost_mode(unsigned int mode
, char *buf
)
208 if (mode
& MODE_INITIATOR
)
209 len
= sprintf(buf
, "%s", "Initiator");
211 if (mode
& MODE_TARGET
)
212 len
+= sprintf(buf
+ len
, "%s%s", len
? ", " : "", "Target");
214 len
+= sprintf(buf
+ len
, "\n");
220 show_shost_supported_mode(struct device
*dev
, struct device_attribute
*attr
,
223 struct Scsi_Host
*shost
= class_to_shost(dev
);
224 unsigned int supported_mode
= shost
->hostt
->supported_mode
;
226 if (supported_mode
== MODE_UNKNOWN
)
227 /* by default this should be initiator */
228 supported_mode
= MODE_INITIATOR
;
230 return show_shost_mode(supported_mode
, buf
);
233 static DEVICE_ATTR(supported_mode
, S_IRUGO
| S_IWUSR
, show_shost_supported_mode
, NULL
);
236 show_shost_active_mode(struct device
*dev
,
237 struct device_attribute
*attr
, char *buf
)
239 struct Scsi_Host
*shost
= class_to_shost(dev
);
241 if (shost
->active_mode
== MODE_UNKNOWN
)
242 return snprintf(buf
, 20, "unknown\n");
244 return show_shost_mode(shost
->active_mode
, buf
);
247 static DEVICE_ATTR(active_mode
, S_IRUGO
| S_IWUSR
, show_shost_active_mode
, NULL
);
249 shost_rd_attr(unique_id
, "%u\n");
250 shost_rd_attr(host_busy
, "%hu\n");
251 shost_rd_attr(cmd_per_lun
, "%hd\n");
252 shost_rd_attr(can_queue
, "%hd\n");
253 shost_rd_attr(sg_tablesize
, "%hu\n");
254 shost_rd_attr(unchecked_isa_dma
, "%d\n");
255 shost_rd_attr(prot_capabilities
, "%u\n");
256 shost_rd_attr(prot_guard_type
, "%hd\n");
257 shost_rd_attr2(proc_name
, hostt
->proc_name
, "%s\n");
259 static struct attribute
*scsi_sysfs_shost_attrs
[] = {
260 &dev_attr_unique_id
.attr
,
261 &dev_attr_host_busy
.attr
,
262 &dev_attr_cmd_per_lun
.attr
,
263 &dev_attr_can_queue
.attr
,
264 &dev_attr_sg_tablesize
.attr
,
265 &dev_attr_unchecked_isa_dma
.attr
,
266 &dev_attr_proc_name
.attr
,
268 &dev_attr_hstate
.attr
,
269 &dev_attr_supported_mode
.attr
,
270 &dev_attr_active_mode
.attr
,
271 &dev_attr_prot_capabilities
.attr
,
272 &dev_attr_prot_guard_type
.attr
,
276 struct attribute_group scsi_shost_attr_group
= {
277 .attrs
= scsi_sysfs_shost_attrs
,
280 const struct attribute_group
*scsi_sysfs_shost_attr_groups
[] = {
281 &scsi_shost_attr_group
,
285 static void scsi_device_cls_release(struct device
*class_dev
)
287 struct scsi_device
*sdev
;
289 sdev
= class_to_sdev(class_dev
);
290 put_device(&sdev
->sdev_gendev
);
293 static void scsi_device_dev_release_usercontext(struct work_struct
*work
)
295 struct scsi_device
*sdev
;
296 struct device
*parent
;
297 struct scsi_target
*starget
;
298 struct list_head
*this, *tmp
;
301 sdev
= container_of(work
, struct scsi_device
, ew
.work
);
303 parent
= sdev
->sdev_gendev
.parent
;
304 starget
= to_scsi_target(parent
);
306 spin_lock_irqsave(sdev
->host
->host_lock
, flags
);
308 list_del(&sdev
->siblings
);
309 list_del(&sdev
->same_target_siblings
);
310 list_del(&sdev
->starved_entry
);
311 spin_unlock_irqrestore(sdev
->host
->host_lock
, flags
);
313 cancel_work_sync(&sdev
->event_work
);
315 list_for_each_safe(this, tmp
, &sdev
->event_list
) {
316 struct scsi_event
*evt
;
318 evt
= list_entry(this, struct scsi_event
, node
);
319 list_del(&evt
->node
);
323 if (sdev
->request_queue
) {
324 sdev
->request_queue
->queuedata
= NULL
;
325 /* user context needed to free queue */
326 scsi_free_queue(sdev
->request_queue
);
327 /* temporary expedient, try to catch use of queue lock
328 * after free of sdev */
329 sdev
->request_queue
= NULL
;
332 scsi_target_reap(scsi_target(sdev
));
334 kfree(sdev
->inquiry
);
341 static void scsi_device_dev_release(struct device
*dev
)
343 struct scsi_device
*sdp
= to_scsi_device(dev
);
344 execute_in_process_context(scsi_device_dev_release_usercontext
,
348 static struct class sdev_class
= {
349 .name
= "scsi_device",
350 .dev_release
= scsi_device_cls_release
,
353 /* all probing is done in the individual ->probe routines */
354 static int scsi_bus_match(struct device
*dev
, struct device_driver
*gendrv
)
356 struct scsi_device
*sdp
;
358 if (dev
->type
!= &scsi_dev_type
)
361 sdp
= to_scsi_device(dev
);
362 if (sdp
->no_uld_attach
)
364 return (sdp
->inq_periph_qual
== SCSI_INQ_PQ_CON
)? 1: 0;
367 static int scsi_bus_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
369 struct scsi_device
*sdev
;
371 if (dev
->type
!= &scsi_dev_type
)
374 sdev
= to_scsi_device(dev
);
376 add_uevent_var(env
, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT
, sdev
->type
);
380 struct bus_type scsi_bus_type
= {
382 .match
= scsi_bus_match
,
383 .uevent
= scsi_bus_uevent
,
385 .pm
= &scsi_bus_pm_ops
,
388 EXPORT_SYMBOL_GPL(scsi_bus_type
);
390 int scsi_sysfs_register(void)
394 error
= bus_register(&scsi_bus_type
);
396 error
= class_register(&sdev_class
);
398 bus_unregister(&scsi_bus_type
);
404 void scsi_sysfs_unregister(void)
406 class_unregister(&sdev_class
);
407 bus_unregister(&scsi_bus_type
);
411 * sdev_show_function: macro to create an attr function that can be used to
412 * show a non-bit field.
414 #define sdev_show_function(field, format_string) \
416 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
419 struct scsi_device *sdev; \
420 sdev = to_scsi_device(dev); \
421 return snprintf (buf, 20, format_string, sdev->field); \
425 * sdev_rd_attr: macro to create a function and attribute variable for a
428 #define sdev_rd_attr(field, format_string) \
429 sdev_show_function(field, format_string) \
430 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
434 * sdev_rw_attr: create a function and attribute variable for a
437 #define sdev_rw_attr(field, format_string) \
438 sdev_show_function(field, format_string) \
441 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
442 const char *buf, size_t count) \
444 struct scsi_device *sdev; \
445 sdev = to_scsi_device(dev); \
446 sscanf (buf, format_string, &sdev->field); \
449 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
451 /* Currently we don't export bit fields, but we might in future,
452 * so leave this code in */
455 * sdev_rd_attr: create a function and attribute variable for a
456 * read/write bit field.
458 #define sdev_rw_attr_bit(field) \
459 sdev_show_function(field, "%d\n") \
462 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
463 const char *buf, size_t count) \
466 struct scsi_device *sdev; \
467 ret = scsi_sdev_check_buf_bit(buf); \
469 sdev = to_scsi_device(dev); \
475 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
478 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
479 * else return -EINVAL.
481 static int scsi_sdev_check_buf_bit(const char *buf
)
483 if ((buf
[1] == '\0') || ((buf
[1] == '\n') && (buf
[2] == '\0'))) {
486 else if (buf
[0] == '0')
495 * Create the actual show/store functions and data structures.
497 sdev_rd_attr (device_blocked
, "%d\n");
498 sdev_rd_attr (queue_depth
, "%d\n");
499 sdev_rd_attr (type
, "%d\n");
500 sdev_rd_attr (scsi_level
, "%d\n");
501 sdev_rd_attr (vendor
, "%.8s\n");
502 sdev_rd_attr (model
, "%.16s\n");
503 sdev_rd_attr (rev
, "%.4s\n");
506 * TODO: can we make these symlinks to the block layer ones?
509 sdev_show_timeout (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
511 struct scsi_device
*sdev
;
512 sdev
= to_scsi_device(dev
);
513 return snprintf(buf
, 20, "%d\n", sdev
->request_queue
->rq_timeout
/ HZ
);
517 sdev_store_timeout (struct device
*dev
, struct device_attribute
*attr
,
518 const char *buf
, size_t count
)
520 struct scsi_device
*sdev
;
522 sdev
= to_scsi_device(dev
);
523 sscanf (buf
, "%d\n", &timeout
);
524 blk_queue_rq_timeout(sdev
->request_queue
, timeout
* HZ
);
527 static DEVICE_ATTR(timeout
, S_IRUGO
| S_IWUSR
, sdev_show_timeout
, sdev_store_timeout
);
530 store_rescan_field (struct device
*dev
, struct device_attribute
*attr
,
531 const char *buf
, size_t count
)
533 scsi_rescan_device(dev
);
536 static DEVICE_ATTR(rescan
, S_IWUSR
, NULL
, store_rescan_field
);
538 static void sdev_store_delete_callback(struct device
*dev
)
540 scsi_remove_device(to_scsi_device(dev
));
544 sdev_store_delete(struct device
*dev
, struct device_attribute
*attr
,
545 const char *buf
, size_t count
)
549 /* An attribute cannot be unregistered by one of its own methods,
550 * so we have to use this roundabout approach.
552 rc
= device_schedule_callback(dev
, sdev_store_delete_callback
);
557 static DEVICE_ATTR(delete, S_IWUSR
, NULL
, sdev_store_delete
);
560 store_state_field(struct device
*dev
, struct device_attribute
*attr
,
561 const char *buf
, size_t count
)
564 struct scsi_device
*sdev
= to_scsi_device(dev
);
565 enum scsi_device_state state
= 0;
567 for (i
= 0; i
< ARRAY_SIZE(sdev_states
); i
++) {
568 const int len
= strlen(sdev_states
[i
].name
);
569 if (strncmp(sdev_states
[i
].name
, buf
, len
) == 0 &&
571 state
= sdev_states
[i
].value
;
578 if (scsi_device_set_state(sdev
, state
))
584 show_state_field(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
586 struct scsi_device
*sdev
= to_scsi_device(dev
);
587 const char *name
= scsi_device_state_name(sdev
->sdev_state
);
592 return snprintf(buf
, 20, "%s\n", name
);
595 static DEVICE_ATTR(state
, S_IRUGO
| S_IWUSR
, show_state_field
, store_state_field
);
598 show_queue_type_field(struct device
*dev
, struct device_attribute
*attr
,
601 struct scsi_device
*sdev
= to_scsi_device(dev
);
602 const char *name
= "none";
604 if (sdev
->ordered_tags
)
606 else if (sdev
->simple_tags
)
609 return snprintf(buf
, 20, "%s\n", name
);
612 static DEVICE_ATTR(queue_type
, S_IRUGO
, show_queue_type_field
, NULL
);
615 show_iostat_counterbits(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
617 return snprintf(buf
, 20, "%d\n", (int)sizeof(atomic_t
) * 8);
620 static DEVICE_ATTR(iocounterbits
, S_IRUGO
, show_iostat_counterbits
, NULL
);
622 #define show_sdev_iostat(field) \
624 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
627 struct scsi_device *sdev = to_scsi_device(dev); \
628 unsigned long long count = atomic_read(&sdev->field); \
629 return snprintf(buf, 20, "0x%llx\n", count); \
631 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
633 show_sdev_iostat(iorequest_cnt
);
634 show_sdev_iostat(iodone_cnt
);
635 show_sdev_iostat(ioerr_cnt
);
638 sdev_show_modalias(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
640 struct scsi_device
*sdev
;
641 sdev
= to_scsi_device(dev
);
642 return snprintf (buf
, 20, SCSI_DEVICE_MODALIAS_FMT
"\n", sdev
->type
);
644 static DEVICE_ATTR(modalias
, S_IRUGO
, sdev_show_modalias
, NULL
);
646 #define DECLARE_EVT_SHOW(name, Cap_name) \
648 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
651 struct scsi_device *sdev = to_scsi_device(dev); \
652 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
653 return snprintf(buf, 20, "%d\n", val); \
656 #define DECLARE_EVT_STORE(name, Cap_name) \
658 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
659 const char *buf, size_t count) \
661 struct scsi_device *sdev = to_scsi_device(dev); \
662 int val = simple_strtoul(buf, NULL, 0); \
664 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
666 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
672 #define DECLARE_EVT(name, Cap_name) \
673 DECLARE_EVT_SHOW(name, Cap_name) \
674 DECLARE_EVT_STORE(name, Cap_name) \
675 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
676 sdev_store_evt_##name);
677 #define REF_EVT(name) &dev_attr_evt_##name.attr
679 DECLARE_EVT(media_change
, MEDIA_CHANGE
)
681 /* Default template for device attributes. May NOT be modified */
682 static struct attribute
*scsi_sdev_attrs
[] = {
683 &dev_attr_device_blocked
.attr
,
685 &dev_attr_scsi_level
.attr
,
686 &dev_attr_vendor
.attr
,
687 &dev_attr_model
.attr
,
689 &dev_attr_rescan
.attr
,
690 &dev_attr_delete
.attr
,
691 &dev_attr_state
.attr
,
692 &dev_attr_timeout
.attr
,
693 &dev_attr_iocounterbits
.attr
,
694 &dev_attr_iorequest_cnt
.attr
,
695 &dev_attr_iodone_cnt
.attr
,
696 &dev_attr_ioerr_cnt
.attr
,
697 &dev_attr_modalias
.attr
,
698 REF_EVT(media_change
),
702 static struct attribute_group scsi_sdev_attr_group
= {
703 .attrs
= scsi_sdev_attrs
,
706 static const struct attribute_group
*scsi_sdev_attr_groups
[] = {
707 &scsi_sdev_attr_group
,
712 sdev_store_queue_depth_rw(struct device
*dev
, struct device_attribute
*attr
,
713 const char *buf
, size_t count
)
716 struct scsi_device
*sdev
= to_scsi_device(dev
);
717 struct scsi_host_template
*sht
= sdev
->host
->hostt
;
719 if (!sht
->change_queue_depth
)
722 depth
= simple_strtoul(buf
, NULL
, 0);
727 retval
= sht
->change_queue_depth(sdev
, depth
,
728 SCSI_QDEPTH_DEFAULT
);
732 sdev
->max_queue_depth
= sdev
->queue_depth
;
737 static struct device_attribute sdev_attr_queue_depth_rw
=
738 __ATTR(queue_depth
, S_IRUGO
| S_IWUSR
, sdev_show_queue_depth
,
739 sdev_store_queue_depth_rw
);
742 sdev_show_queue_ramp_up_period(struct device
*dev
,
743 struct device_attribute
*attr
,
746 struct scsi_device
*sdev
;
747 sdev
= to_scsi_device(dev
);
748 return snprintf(buf
, 20, "%u\n",
749 jiffies_to_msecs(sdev
->queue_ramp_up_period
));
753 sdev_store_queue_ramp_up_period(struct device
*dev
,
754 struct device_attribute
*attr
,
755 const char *buf
, size_t count
)
757 struct scsi_device
*sdev
= to_scsi_device(dev
);
758 unsigned long period
;
760 if (strict_strtoul(buf
, 10, &period
))
763 sdev
->queue_ramp_up_period
= msecs_to_jiffies(period
);
767 static struct device_attribute sdev_attr_queue_ramp_up_period
=
768 __ATTR(queue_ramp_up_period
, S_IRUGO
| S_IWUSR
,
769 sdev_show_queue_ramp_up_period
,
770 sdev_store_queue_ramp_up_period
);
773 sdev_store_queue_type_rw(struct device
*dev
, struct device_attribute
*attr
,
774 const char *buf
, size_t count
)
776 struct scsi_device
*sdev
= to_scsi_device(dev
);
777 struct scsi_host_template
*sht
= sdev
->host
->hostt
;
778 int tag_type
= 0, retval
;
779 int prev_tag_type
= scsi_get_tag_type(sdev
);
781 if (!sdev
->tagged_supported
|| !sht
->change_queue_type
)
784 if (strncmp(buf
, "ordered", 7) == 0)
785 tag_type
= MSG_ORDERED_TAG
;
786 else if (strncmp(buf
, "simple", 6) == 0)
787 tag_type
= MSG_SIMPLE_TAG
;
788 else if (strncmp(buf
, "none", 4) != 0)
791 if (tag_type
== prev_tag_type
)
794 retval
= sht
->change_queue_type(sdev
, tag_type
);
801 static int scsi_target_add(struct scsi_target
*starget
)
805 if (starget
->state
!= STARGET_CREATED
)
808 error
= device_add(&starget
->dev
);
810 dev_err(&starget
->dev
, "target device_add failed, error %d\n", error
);
813 transport_add_device(&starget
->dev
);
814 starget
->state
= STARGET_RUNNING
;
816 pm_runtime_set_active(&starget
->dev
);
817 pm_runtime_enable(&starget
->dev
);
818 device_enable_async_suspend(&starget
->dev
);
823 static struct device_attribute sdev_attr_queue_type_rw
=
824 __ATTR(queue_type
, S_IRUGO
| S_IWUSR
, show_queue_type_field
,
825 sdev_store_queue_type_rw
);
828 * scsi_sysfs_add_sdev - add scsi device to sysfs
829 * @sdev: scsi_device to add
832 * 0 on Success / non-zero on Failure
834 int scsi_sysfs_add_sdev(struct scsi_device
*sdev
)
837 struct request_queue
*rq
= sdev
->request_queue
;
838 struct scsi_target
*starget
= sdev
->sdev_target
;
840 error
= scsi_device_set_state(sdev
, SDEV_RUNNING
);
844 error
= scsi_target_add(starget
);
848 transport_configure_device(&starget
->dev
);
850 device_enable_async_suspend(&sdev
->sdev_gendev
);
851 scsi_autopm_get_target(starget
);
852 pm_runtime_set_active(&sdev
->sdev_gendev
);
853 pm_runtime_forbid(&sdev
->sdev_gendev
);
854 pm_runtime_enable(&sdev
->sdev_gendev
);
855 scsi_autopm_put_target(starget
);
857 /* The following call will keep sdev active indefinitely, until
858 * its driver does a corresponding scsi_autopm_pm_device(). Only
859 * drivers supporting autosuspend will do this.
861 scsi_autopm_get_device(sdev
);
863 error
= device_add(&sdev
->sdev_gendev
);
865 printk(KERN_INFO
"error 1\n");
868 device_enable_async_suspend(&sdev
->sdev_dev
);
869 error
= device_add(&sdev
->sdev_dev
);
871 printk(KERN_INFO
"error 2\n");
872 device_del(&sdev
->sdev_gendev
);
875 transport_add_device(&sdev
->sdev_gendev
);
876 sdev
->is_visible
= 1;
878 /* create queue files, which may be writable, depending on the host */
879 if (sdev
->host
->hostt
->change_queue_depth
) {
880 error
= device_create_file(&sdev
->sdev_gendev
,
881 &sdev_attr_queue_depth_rw
);
882 error
= device_create_file(&sdev
->sdev_gendev
,
883 &sdev_attr_queue_ramp_up_period
);
886 error
= device_create_file(&sdev
->sdev_gendev
, &dev_attr_queue_depth
);
890 if (sdev
->host
->hostt
->change_queue_type
)
891 error
= device_create_file(&sdev
->sdev_gendev
, &sdev_attr_queue_type_rw
);
893 error
= device_create_file(&sdev
->sdev_gendev
, &dev_attr_queue_type
);
897 error
= bsg_register_queue(rq
, &sdev
->sdev_gendev
, NULL
, NULL
);
900 /* we're treating error on bsg register as non-fatal,
901 * so pretend nothing went wrong */
902 sdev_printk(KERN_INFO
, sdev
,
903 "Failed to register bsg queue, errno=%d\n", error
);
905 /* add additional host specific attributes */
906 if (sdev
->host
->hostt
->sdev_attrs
) {
907 for (i
= 0; sdev
->host
->hostt
->sdev_attrs
[i
]; i
++) {
908 error
= device_create_file(&sdev
->sdev_gendev
,
909 sdev
->host
->hostt
->sdev_attrs
[i
]);
918 void __scsi_remove_device(struct scsi_device
*sdev
)
920 struct device
*dev
= &sdev
->sdev_gendev
;
922 if (sdev
->is_visible
) {
923 if (scsi_device_set_state(sdev
, SDEV_CANCEL
) != 0)
926 bsg_unregister_queue(sdev
->request_queue
);
927 device_unregister(&sdev
->sdev_dev
);
928 transport_remove_device(dev
);
931 put_device(&sdev
->sdev_dev
);
932 scsi_device_set_state(sdev
, SDEV_DEL
);
933 if (sdev
->host
->hostt
->slave_destroy
)
934 sdev
->host
->hostt
->slave_destroy(sdev
);
935 transport_destroy_device(dev
);
940 * scsi_remove_device - unregister a device from the scsi bus
941 * @sdev: scsi_device to unregister
943 void scsi_remove_device(struct scsi_device
*sdev
)
945 struct Scsi_Host
*shost
= sdev
->host
;
947 mutex_lock(&shost
->scan_mutex
);
948 __scsi_remove_device(sdev
);
949 mutex_unlock(&shost
->scan_mutex
);
951 EXPORT_SYMBOL(scsi_remove_device
);
953 static void __scsi_remove_target(struct scsi_target
*starget
)
955 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
957 struct scsi_device
*sdev
;
959 spin_lock_irqsave(shost
->host_lock
, flags
);
962 list_for_each_entry(sdev
, &shost
->__devices
, siblings
) {
963 if (sdev
->channel
!= starget
->channel
||
964 sdev
->id
!= starget
->id
||
965 sdev
->sdev_state
== SDEV_DEL
)
967 spin_unlock_irqrestore(shost
->host_lock
, flags
);
968 scsi_remove_device(sdev
);
969 spin_lock_irqsave(shost
->host_lock
, flags
);
972 spin_unlock_irqrestore(shost
->host_lock
, flags
);
973 scsi_target_reap(starget
);
976 static int __remove_child (struct device
* dev
, void * data
)
978 if (scsi_is_target_device(dev
))
979 __scsi_remove_target(to_scsi_target(dev
));
984 * scsi_remove_target - try to remove a target and all its devices
985 * @dev: generic starget or parent of generic stargets to be removed
987 * Note: This is slightly racy. It is possible that if the user
988 * requests the addition of another device then the target won't be
991 void scsi_remove_target(struct device
*dev
)
995 if (scsi_is_target_device(dev
)) {
996 __scsi_remove_target(to_scsi_target(dev
));
1000 rdev
= get_device(dev
);
1001 device_for_each_child(dev
, NULL
, __remove_child
);
1004 EXPORT_SYMBOL(scsi_remove_target
);
1006 int scsi_register_driver(struct device_driver
*drv
)
1008 drv
->bus
= &scsi_bus_type
;
1010 return driver_register(drv
);
1012 EXPORT_SYMBOL(scsi_register_driver
);
1014 int scsi_register_interface(struct class_interface
*intf
)
1016 intf
->class = &sdev_class
;
1018 return class_interface_register(intf
);
1020 EXPORT_SYMBOL(scsi_register_interface
);
1023 * scsi_sysfs_add_host - add scsi host to subsystem
1024 * @shost: scsi host struct to add to subsystem
1026 int scsi_sysfs_add_host(struct Scsi_Host
*shost
)
1030 /* add host specific attributes */
1031 if (shost
->hostt
->shost_attrs
) {
1032 for (i
= 0; shost
->hostt
->shost_attrs
[i
]; i
++) {
1033 error
= device_create_file(&shost
->shost_dev
,
1034 shost
->hostt
->shost_attrs
[i
]);
1040 transport_register_device(&shost
->shost_gendev
);
1041 transport_configure_device(&shost
->shost_gendev
);
1045 static struct device_type scsi_dev_type
= {
1046 .name
= "scsi_device",
1047 .release
= scsi_device_dev_release
,
1048 .groups
= scsi_sdev_attr_groups
,
1051 void scsi_sysfs_device_initialize(struct scsi_device
*sdev
)
1053 unsigned long flags
;
1054 struct Scsi_Host
*shost
= sdev
->host
;
1055 struct scsi_target
*starget
= sdev
->sdev_target
;
1057 device_initialize(&sdev
->sdev_gendev
);
1058 sdev
->sdev_gendev
.bus
= &scsi_bus_type
;
1059 sdev
->sdev_gendev
.type
= &scsi_dev_type
;
1060 dev_set_name(&sdev
->sdev_gendev
, "%d:%d:%d:%d",
1061 sdev
->host
->host_no
, sdev
->channel
, sdev
->id
, sdev
->lun
);
1063 device_initialize(&sdev
->sdev_dev
);
1064 sdev
->sdev_dev
.parent
= get_device(&sdev
->sdev_gendev
);
1065 sdev
->sdev_dev
.class = &sdev_class
;
1066 dev_set_name(&sdev
->sdev_dev
, "%d:%d:%d:%d",
1067 sdev
->host
->host_no
, sdev
->channel
, sdev
->id
, sdev
->lun
);
1068 sdev
->scsi_level
= starget
->scsi_level
;
1069 transport_setup_device(&sdev
->sdev_gendev
);
1070 spin_lock_irqsave(shost
->host_lock
, flags
);
1071 list_add_tail(&sdev
->same_target_siblings
, &starget
->devices
);
1072 list_add_tail(&sdev
->siblings
, &shost
->__devices
);
1073 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1076 int scsi_is_sdev_device(const struct device
*dev
)
1078 return dev
->type
== &scsi_dev_type
;
1080 EXPORT_SYMBOL(scsi_is_sdev_device
);
1082 /* A blank transport template that is used in drivers that don't
1083 * yet implement Transport Attributes */
1084 struct scsi_transport_template blank_transport_template
= { { { {NULL
, }, }, }, };