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_TRANSPORT_OFFLINE, "transport-offline" },
39 { SDEV_BLOCK, "blocked" },
40 { SDEV_CREATED_BLOCK, "created-blocked" },
43 const char *scsi_device_state_name(enum scsi_device_state state)
48 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
49 if (sdev_states[i].value == state) {
50 name = sdev_states[i].name;
58 enum scsi_host_state value;
61 { SHOST_CREATED, "created" },
62 { SHOST_RUNNING, "running" },
63 { SHOST_CANCEL, "cancel" },
64 { SHOST_DEL, "deleted" },
65 { SHOST_RECOVERY, "recovery" },
66 { SHOST_CANCEL_RECOVERY, "cancel/recovery" },
67 { SHOST_DEL_RECOVERY, "deleted/recovery", },
69 const char *scsi_host_state_name(enum scsi_host_state state)
74 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
75 if (shost_states[i].value == state) {
76 name = shost_states[i].name;
83 static int check_set(unsigned int *val, char *src)
87 if (strncmp(src, "-", 20) == 0) {
88 *val = SCAN_WILD_CARD;
91 * Doesn't check for int overflow
93 *val = simple_strtoul(src, &last, 0);
100 static int scsi_scan(struct Scsi_Host *shost, const char *str)
102 char s1[15], s2[15], s3[15], junk;
103 unsigned int channel, id, lun;
106 res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk);
109 if (check_set(&channel, s1))
111 if (check_set(&id, s2))
113 if (check_set(&lun, s3))
115 if (shost->transportt->user_scan)
116 res = shost->transportt->user_scan(shost, channel, id, lun);
118 res = scsi_scan_host_selected(shost, channel, id, lun, 1);
123 * shost_show_function: macro to create an attr function that can be used to
124 * show a non-bit field.
126 #define shost_show_function(name, field, format_string) \
128 show_##name (struct device *dev, struct device_attribute *attr, \
131 struct Scsi_Host *shost = class_to_shost(dev); \
132 return snprintf (buf, 20, format_string, shost->field); \
136 * shost_rd_attr: macro to create a function and attribute variable for a
139 #define shost_rd_attr2(name, field, format_string) \
140 shost_show_function(name, field, format_string) \
141 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
143 #define shost_rd_attr(field, format_string) \
144 shost_rd_attr2(field, field, format_string)
147 * Create the actual show/store functions and data structures.
151 store_scan(struct device *dev, struct device_attribute *attr,
152 const char *buf, size_t count)
154 struct Scsi_Host *shost = class_to_shost(dev);
157 res = scsi_scan(shost, buf);
162 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
165 store_shost_state(struct device *dev, struct device_attribute *attr,
166 const char *buf, size_t count)
169 struct Scsi_Host *shost = class_to_shost(dev);
170 enum scsi_host_state state = 0;
172 for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
173 const int len = strlen(shost_states[i].name);
174 if (strncmp(shost_states[i].name, buf, len) == 0 &&
176 state = shost_states[i].value;
183 if (scsi_host_set_state(shost, state))
189 show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
191 struct Scsi_Host *shost = class_to_shost(dev);
192 const char *name = scsi_host_state_name(shost->shost_state);
197 return snprintf(buf, 20, "%s\n", name);
200 /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
201 struct device_attribute dev_attr_hstate =
202 __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
205 show_shost_mode(unsigned int mode, char *buf)
209 if (mode & MODE_INITIATOR)
210 len = sprintf(buf, "%s", "Initiator");
212 if (mode & MODE_TARGET)
213 len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
215 len += sprintf(buf + len, "\n");
221 show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
224 struct Scsi_Host *shost = class_to_shost(dev);
225 unsigned int supported_mode = shost->hostt->supported_mode;
227 if (supported_mode == MODE_UNKNOWN)
228 /* by default this should be initiator */
229 supported_mode = MODE_INITIATOR;
231 return show_shost_mode(supported_mode, buf);
234 static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
237 show_shost_active_mode(struct device *dev,
238 struct device_attribute *attr, char *buf)
240 struct Scsi_Host *shost = class_to_shost(dev);
242 if (shost->active_mode == MODE_UNKNOWN)
243 return snprintf(buf, 20, "unknown\n");
245 return show_shost_mode(shost->active_mode, buf);
248 static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
250 static int check_reset_type(const char *str)
252 if (sysfs_streq(str, "adapter"))
253 return SCSI_ADAPTER_RESET;
254 else if (sysfs_streq(str, "firmware"))
255 return SCSI_FIRMWARE_RESET;
261 store_host_reset(struct device *dev, struct device_attribute *attr,
262 const char *buf, size_t count)
264 struct Scsi_Host *shost = class_to_shost(dev);
265 struct scsi_host_template *sht = shost->hostt;
269 type = check_reset_type(buf);
271 goto exit_store_host_reset;
274 ret = sht->host_reset(shost, type);
276 exit_store_host_reset:
282 static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
284 shost_rd_attr(unique_id, "%u\n");
285 shost_rd_attr(host_busy, "%hu\n");
286 shost_rd_attr(cmd_per_lun, "%hd\n");
287 shost_rd_attr(can_queue, "%hd\n");
288 shost_rd_attr(sg_tablesize, "%hu\n");
289 shost_rd_attr(sg_prot_tablesize, "%hu\n");
290 shost_rd_attr(unchecked_isa_dma, "%d\n");
291 shost_rd_attr(prot_capabilities, "%u\n");
292 shost_rd_attr(prot_guard_type, "%hd\n");
293 shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
295 static struct attribute *scsi_sysfs_shost_attrs[] = {
296 &dev_attr_unique_id.attr,
297 &dev_attr_host_busy.attr,
298 &dev_attr_cmd_per_lun.attr,
299 &dev_attr_can_queue.attr,
300 &dev_attr_sg_tablesize.attr,
301 &dev_attr_sg_prot_tablesize.attr,
302 &dev_attr_unchecked_isa_dma.attr,
303 &dev_attr_proc_name.attr,
305 &dev_attr_hstate.attr,
306 &dev_attr_supported_mode.attr,
307 &dev_attr_active_mode.attr,
308 &dev_attr_prot_capabilities.attr,
309 &dev_attr_prot_guard_type.attr,
310 &dev_attr_host_reset.attr,
314 struct attribute_group scsi_shost_attr_group = {
315 .attrs = scsi_sysfs_shost_attrs,
318 const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
319 &scsi_shost_attr_group,
323 static void scsi_device_cls_release(struct device *class_dev)
325 struct scsi_device *sdev;
327 sdev = class_to_sdev(class_dev);
328 put_device(&sdev->sdev_gendev);
331 static void scsi_device_dev_release_usercontext(struct work_struct *work)
333 struct scsi_device *sdev;
334 struct device *parent;
335 struct scsi_target *starget;
336 struct list_head *this, *tmp;
339 sdev = container_of(work, struct scsi_device, ew.work);
341 parent = sdev->sdev_gendev.parent;
342 starget = to_scsi_target(parent);
344 spin_lock_irqsave(sdev->host->host_lock, flags);
346 list_del(&sdev->siblings);
347 list_del(&sdev->same_target_siblings);
348 list_del(&sdev->starved_entry);
349 spin_unlock_irqrestore(sdev->host->host_lock, flags);
351 cancel_work_sync(&sdev->event_work);
353 list_for_each_safe(this, tmp, &sdev->event_list) {
354 struct scsi_event *evt;
356 evt = list_entry(this, struct scsi_event, node);
357 list_del(&evt->node);
361 blk_put_queue(sdev->request_queue);
362 /* NULL queue means the device can't be used */
363 sdev->request_queue = NULL;
365 scsi_target_reap(scsi_target(sdev));
367 kfree(sdev->inquiry);
374 static void scsi_device_dev_release(struct device *dev)
376 struct scsi_device *sdp = to_scsi_device(dev);
377 execute_in_process_context(scsi_device_dev_release_usercontext,
381 static struct class sdev_class = {
382 .name = "scsi_device",
383 .dev_release = scsi_device_cls_release,
386 /* all probing is done in the individual ->probe routines */
387 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
389 struct scsi_device *sdp;
391 if (dev->type != &scsi_dev_type)
394 sdp = to_scsi_device(dev);
395 if (sdp->no_uld_attach)
397 return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
400 static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
402 struct scsi_device *sdev;
404 if (dev->type != &scsi_dev_type)
407 sdev = to_scsi_device(dev);
409 add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
413 struct bus_type scsi_bus_type = {
415 .match = scsi_bus_match,
416 .uevent = scsi_bus_uevent,
418 .pm = &scsi_bus_pm_ops,
421 EXPORT_SYMBOL_GPL(scsi_bus_type);
423 int scsi_sysfs_register(void)
427 error = bus_register(&scsi_bus_type);
429 error = class_register(&sdev_class);
431 bus_unregister(&scsi_bus_type);
437 void scsi_sysfs_unregister(void)
439 class_unregister(&sdev_class);
440 bus_unregister(&scsi_bus_type);
444 * sdev_show_function: macro to create an attr function that can be used to
445 * show a non-bit field.
447 #define sdev_show_function(field, format_string) \
449 sdev_show_##field (struct device *dev, struct device_attribute *attr, \
452 struct scsi_device *sdev; \
453 sdev = to_scsi_device(dev); \
454 return snprintf (buf, 20, format_string, sdev->field); \
458 * sdev_rd_attr: macro to create a function and attribute variable for a
461 #define sdev_rd_attr(field, format_string) \
462 sdev_show_function(field, format_string) \
463 static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
467 * sdev_rw_attr: create a function and attribute variable for a
470 #define sdev_rw_attr(field, format_string) \
471 sdev_show_function(field, format_string) \
474 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
475 const char *buf, size_t count) \
477 struct scsi_device *sdev; \
478 sdev = to_scsi_device(dev); \
479 sscanf (buf, format_string, &sdev->field); \
482 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
484 /* Currently we don't export bit fields, but we might in future,
485 * so leave this code in */
488 * sdev_rd_attr: create a function and attribute variable for a
489 * read/write bit field.
491 #define sdev_rw_attr_bit(field) \
492 sdev_show_function(field, "%d\n") \
495 sdev_store_##field (struct device *dev, struct device_attribute *attr, \
496 const char *buf, size_t count) \
499 struct scsi_device *sdev; \
500 ret = scsi_sdev_check_buf_bit(buf); \
502 sdev = to_scsi_device(dev); \
508 static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
511 * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
512 * else return -EINVAL.
514 static int scsi_sdev_check_buf_bit(const char *buf)
516 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
519 else if (buf[0] == '0')
528 * Create the actual show/store functions and data structures.
530 sdev_rd_attr (device_blocked, "%d\n");
531 sdev_rd_attr (queue_depth, "%d\n");
532 sdev_rd_attr (device_busy, "%d\n");
533 sdev_rd_attr (type, "%d\n");
534 sdev_rd_attr (scsi_level, "%d\n");
535 sdev_rd_attr (vendor, "%.8s\n");
536 sdev_rd_attr (model, "%.16s\n");
537 sdev_rd_attr (rev, "%.4s\n");
540 * TODO: can we make these symlinks to the block layer ones?
543 sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
545 struct scsi_device *sdev;
546 sdev = to_scsi_device(dev);
547 return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
551 sdev_store_timeout (struct device *dev, struct device_attribute *attr,
552 const char *buf, size_t count)
554 struct scsi_device *sdev;
556 sdev = to_scsi_device(dev);
557 sscanf (buf, "%d\n", &timeout);
558 blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
561 static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
564 sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
566 struct scsi_device *sdev;
567 sdev = to_scsi_device(dev);
568 return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
572 sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
573 const char *buf, size_t count)
575 struct scsi_device *sdev;
576 unsigned int eh_timeout;
579 if (!capable(CAP_SYS_ADMIN))
582 sdev = to_scsi_device(dev);
583 err = kstrtouint(buf, 10, &eh_timeout);
586 sdev->eh_timeout = eh_timeout * HZ;
590 static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
593 store_rescan_field (struct device *dev, struct device_attribute *attr,
594 const char *buf, size_t count)
596 scsi_rescan_device(dev);
599 static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
601 static void sdev_store_delete_callback(struct device *dev)
603 scsi_remove_device(to_scsi_device(dev));
607 sdev_store_delete(struct device *dev, struct device_attribute *attr,
608 const char *buf, size_t count)
612 /* An attribute cannot be unregistered by one of its own methods,
613 * so we have to use this roundabout approach.
615 rc = device_schedule_callback(dev, sdev_store_delete_callback);
620 static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
623 store_state_field(struct device *dev, struct device_attribute *attr,
624 const char *buf, size_t count)
627 struct scsi_device *sdev = to_scsi_device(dev);
628 enum scsi_device_state state = 0;
630 for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
631 const int len = strlen(sdev_states[i].name);
632 if (strncmp(sdev_states[i].name, buf, len) == 0 &&
634 state = sdev_states[i].value;
641 if (scsi_device_set_state(sdev, state))
647 show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
649 struct scsi_device *sdev = to_scsi_device(dev);
650 const char *name = scsi_device_state_name(sdev->sdev_state);
655 return snprintf(buf, 20, "%s\n", name);
658 static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
661 show_queue_type_field(struct device *dev, struct device_attribute *attr,
664 struct scsi_device *sdev = to_scsi_device(dev);
665 const char *name = "none";
667 if (sdev->ordered_tags)
669 else if (sdev->simple_tags)
672 return snprintf(buf, 20, "%s\n", name);
675 static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
678 show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
680 return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
683 static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
685 #define show_sdev_iostat(field) \
687 show_iostat_##field(struct device *dev, struct device_attribute *attr, \
690 struct scsi_device *sdev = to_scsi_device(dev); \
691 unsigned long long count = atomic_read(&sdev->field); \
692 return snprintf(buf, 20, "0x%llx\n", count); \
694 static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
696 show_sdev_iostat(iorequest_cnt);
697 show_sdev_iostat(iodone_cnt);
698 show_sdev_iostat(ioerr_cnt);
701 sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
703 struct scsi_device *sdev;
704 sdev = to_scsi_device(dev);
705 return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
707 static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
709 #define DECLARE_EVT_SHOW(name, Cap_name) \
711 sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
714 struct scsi_device *sdev = to_scsi_device(dev); \
715 int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
716 return snprintf(buf, 20, "%d\n", val); \
719 #define DECLARE_EVT_STORE(name, Cap_name) \
721 sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
722 const char *buf, size_t count) \
724 struct scsi_device *sdev = to_scsi_device(dev); \
725 int val = simple_strtoul(buf, NULL, 0); \
727 clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
729 set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
735 #define DECLARE_EVT(name, Cap_name) \
736 DECLARE_EVT_SHOW(name, Cap_name) \
737 DECLARE_EVT_STORE(name, Cap_name) \
738 static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
739 sdev_store_evt_##name);
740 #define REF_EVT(name) &dev_attr_evt_##name.attr
742 DECLARE_EVT(media_change, MEDIA_CHANGE)
743 DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
744 DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
745 DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
746 DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
747 DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
749 /* Default template for device attributes. May NOT be modified */
750 static struct attribute *scsi_sdev_attrs[] = {
751 &dev_attr_device_blocked.attr,
753 &dev_attr_scsi_level.attr,
754 &dev_attr_device_busy.attr,
755 &dev_attr_vendor.attr,
756 &dev_attr_model.attr,
758 &dev_attr_rescan.attr,
759 &dev_attr_delete.attr,
760 &dev_attr_state.attr,
761 &dev_attr_timeout.attr,
762 &dev_attr_eh_timeout.attr,
763 &dev_attr_iocounterbits.attr,
764 &dev_attr_iorequest_cnt.attr,
765 &dev_attr_iodone_cnt.attr,
766 &dev_attr_ioerr_cnt.attr,
767 &dev_attr_modalias.attr,
768 REF_EVT(media_change),
769 REF_EVT(inquiry_change_reported),
770 REF_EVT(capacity_change_reported),
771 REF_EVT(soft_threshold_reached),
772 REF_EVT(mode_parameter_change_reported),
773 REF_EVT(lun_change_reported),
777 static struct attribute_group scsi_sdev_attr_group = {
778 .attrs = scsi_sdev_attrs,
781 static const struct attribute_group *scsi_sdev_attr_groups[] = {
782 &scsi_sdev_attr_group,
787 sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
788 const char *buf, size_t count)
791 struct scsi_device *sdev = to_scsi_device(dev);
792 struct scsi_host_template *sht = sdev->host->hostt;
794 if (!sht->change_queue_depth)
797 depth = simple_strtoul(buf, NULL, 0);
802 retval = sht->change_queue_depth(sdev, depth,
803 SCSI_QDEPTH_DEFAULT);
807 sdev->max_queue_depth = sdev->queue_depth;
812 static struct device_attribute sdev_attr_queue_depth_rw =
813 __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
814 sdev_store_queue_depth_rw);
817 sdev_show_queue_ramp_up_period(struct device *dev,
818 struct device_attribute *attr,
821 struct scsi_device *sdev;
822 sdev = to_scsi_device(dev);
823 return snprintf(buf, 20, "%u\n",
824 jiffies_to_msecs(sdev->queue_ramp_up_period));
828 sdev_store_queue_ramp_up_period(struct device *dev,
829 struct device_attribute *attr,
830 const char *buf, size_t count)
832 struct scsi_device *sdev = to_scsi_device(dev);
833 unsigned long period;
835 if (strict_strtoul(buf, 10, &period))
838 sdev->queue_ramp_up_period = msecs_to_jiffies(period);
842 static struct device_attribute sdev_attr_queue_ramp_up_period =
843 __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
844 sdev_show_queue_ramp_up_period,
845 sdev_store_queue_ramp_up_period);
848 sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
849 const char *buf, size_t count)
851 struct scsi_device *sdev = to_scsi_device(dev);
852 struct scsi_host_template *sht = sdev->host->hostt;
853 int tag_type = 0, retval;
854 int prev_tag_type = scsi_get_tag_type(sdev);
856 if (!sdev->tagged_supported || !sht->change_queue_type)
859 if (strncmp(buf, "ordered", 7) == 0)
860 tag_type = MSG_ORDERED_TAG;
861 else if (strncmp(buf, "simple", 6) == 0)
862 tag_type = MSG_SIMPLE_TAG;
863 else if (strncmp(buf, "none", 4) != 0)
866 if (tag_type == prev_tag_type)
869 retval = sht->change_queue_type(sdev, tag_type);
876 static int scsi_target_add(struct scsi_target *starget)
880 if (starget->state != STARGET_CREATED)
883 error = device_add(&starget->dev);
885 dev_err(&starget->dev, "target device_add failed, error %d\n", error);
888 transport_add_device(&starget->dev);
889 starget->state = STARGET_RUNNING;
891 pm_runtime_set_active(&starget->dev);
892 pm_runtime_enable(&starget->dev);
893 device_enable_async_suspend(&starget->dev);
898 static struct device_attribute sdev_attr_queue_type_rw =
899 __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
900 sdev_store_queue_type_rw);
903 * scsi_sysfs_add_sdev - add scsi device to sysfs
904 * @sdev: scsi_device to add
907 * 0 on Success / non-zero on Failure
909 int scsi_sysfs_add_sdev(struct scsi_device *sdev)
912 struct request_queue *rq = sdev->request_queue;
913 struct scsi_target *starget = sdev->sdev_target;
915 error = scsi_device_set_state(sdev, SDEV_RUNNING);
919 error = scsi_target_add(starget);
923 transport_configure_device(&starget->dev);
925 device_enable_async_suspend(&sdev->sdev_gendev);
926 scsi_autopm_get_target(starget);
927 pm_runtime_set_active(&sdev->sdev_gendev);
928 pm_runtime_forbid(&sdev->sdev_gendev);
929 pm_runtime_enable(&sdev->sdev_gendev);
930 scsi_autopm_put_target(starget);
932 /* The following call will keep sdev active indefinitely, until
933 * its driver does a corresponding scsi_autopm_pm_device(). Only
934 * drivers supporting autosuspend will do this.
936 scsi_autopm_get_device(sdev);
938 error = device_add(&sdev->sdev_gendev);
940 sdev_printk(KERN_INFO, sdev,
941 "failed to add device: %d\n", error);
944 device_enable_async_suspend(&sdev->sdev_dev);
945 error = device_add(&sdev->sdev_dev);
947 sdev_printk(KERN_INFO, sdev,
948 "failed to add class device: %d\n", error);
949 device_del(&sdev->sdev_gendev);
952 transport_add_device(&sdev->sdev_gendev);
953 sdev->is_visible = 1;
955 /* create queue files, which may be writable, depending on the host */
956 if (sdev->host->hostt->change_queue_depth) {
957 error = device_create_file(&sdev->sdev_gendev,
958 &sdev_attr_queue_depth_rw);
959 error = device_create_file(&sdev->sdev_gendev,
960 &sdev_attr_queue_ramp_up_period);
963 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
967 if (sdev->host->hostt->change_queue_type)
968 error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
970 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
974 error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
977 /* we're treating error on bsg register as non-fatal,
978 * so pretend nothing went wrong */
979 sdev_printk(KERN_INFO, sdev,
980 "Failed to register bsg queue, errno=%d\n", error);
982 /* add additional host specific attributes */
983 if (sdev->host->hostt->sdev_attrs) {
984 for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
985 error = device_create_file(&sdev->sdev_gendev,
986 sdev->host->hostt->sdev_attrs[i]);
995 void __scsi_remove_device(struct scsi_device *sdev)
997 struct device *dev = &sdev->sdev_gendev;
999 if (sdev->is_visible) {
1000 if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
1003 bsg_unregister_queue(sdev->request_queue);
1004 device_unregister(&sdev->sdev_dev);
1005 transport_remove_device(dev);
1008 put_device(&sdev->sdev_dev);
1011 * Stop accepting new requests and wait until all queuecommand() and
1012 * scsi_run_queue() invocations have finished before tearing down the
1015 scsi_device_set_state(sdev, SDEV_DEL);
1016 blk_cleanup_queue(sdev->request_queue);
1017 cancel_work_sync(&sdev->requeue_work);
1019 if (sdev->host->hostt->slave_destroy)
1020 sdev->host->hostt->slave_destroy(sdev);
1021 transport_destroy_device(dev);
1027 * scsi_remove_device - unregister a device from the scsi bus
1028 * @sdev: scsi_device to unregister
1030 void scsi_remove_device(struct scsi_device *sdev)
1032 struct Scsi_Host *shost = sdev->host;
1034 mutex_lock(&shost->scan_mutex);
1035 __scsi_remove_device(sdev);
1036 mutex_unlock(&shost->scan_mutex);
1038 EXPORT_SYMBOL(scsi_remove_device);
1040 static void __scsi_remove_target(struct scsi_target *starget)
1042 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1043 unsigned long flags;
1044 struct scsi_device *sdev;
1046 spin_lock_irqsave(shost->host_lock, flags);
1048 list_for_each_entry(sdev, &shost->__devices, siblings) {
1049 if (sdev->channel != starget->channel ||
1050 sdev->id != starget->id ||
1051 scsi_device_get(sdev))
1053 spin_unlock_irqrestore(shost->host_lock, flags);
1054 scsi_remove_device(sdev);
1055 scsi_device_put(sdev);
1056 spin_lock_irqsave(shost->host_lock, flags);
1059 spin_unlock_irqrestore(shost->host_lock, flags);
1063 * scsi_remove_target - try to remove a target and all its devices
1064 * @dev: generic starget or parent of generic stargets to be removed
1066 * Note: This is slightly racy. It is possible that if the user
1067 * requests the addition of another device then the target won't be
1070 void scsi_remove_target(struct device *dev)
1072 struct Scsi_Host *shost = dev_to_shost(dev->parent);
1073 struct scsi_target *starget, *last = NULL;
1074 unsigned long flags;
1076 /* remove targets being careful to lookup next entry before
1079 spin_lock_irqsave(shost->host_lock, flags);
1080 list_for_each_entry(starget, &shost->__targets, siblings) {
1081 if (starget->state == STARGET_DEL)
1083 if (starget->dev.parent == dev || &starget->dev == dev) {
1084 /* assuming new targets arrive at the end */
1085 starget->reap_ref++;
1086 spin_unlock_irqrestore(shost->host_lock, flags);
1088 scsi_target_reap(last);
1090 __scsi_remove_target(starget);
1091 spin_lock_irqsave(shost->host_lock, flags);
1094 spin_unlock_irqrestore(shost->host_lock, flags);
1097 scsi_target_reap(last);
1099 EXPORT_SYMBOL(scsi_remove_target);
1101 int scsi_register_driver(struct device_driver *drv)
1103 drv->bus = &scsi_bus_type;
1105 return driver_register(drv);
1107 EXPORT_SYMBOL(scsi_register_driver);
1109 int scsi_register_interface(struct class_interface *intf)
1111 intf->class = &sdev_class;
1113 return class_interface_register(intf);
1115 EXPORT_SYMBOL(scsi_register_interface);
1118 * scsi_sysfs_add_host - add scsi host to subsystem
1119 * @shost: scsi host struct to add to subsystem
1121 int scsi_sysfs_add_host(struct Scsi_Host *shost)
1125 /* add host specific attributes */
1126 if (shost->hostt->shost_attrs) {
1127 for (i = 0; shost->hostt->shost_attrs[i]; i++) {
1128 error = device_create_file(&shost->shost_dev,
1129 shost->hostt->shost_attrs[i]);
1135 transport_register_device(&shost->shost_gendev);
1136 transport_configure_device(&shost->shost_gendev);
1140 static struct device_type scsi_dev_type = {
1141 .name = "scsi_device",
1142 .release = scsi_device_dev_release,
1143 .groups = scsi_sdev_attr_groups,
1146 void scsi_sysfs_device_initialize(struct scsi_device *sdev)
1148 unsigned long flags;
1149 struct Scsi_Host *shost = sdev->host;
1150 struct scsi_target *starget = sdev->sdev_target;
1152 device_initialize(&sdev->sdev_gendev);
1153 sdev->sdev_gendev.bus = &scsi_bus_type;
1154 sdev->sdev_gendev.type = &scsi_dev_type;
1155 dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
1156 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1158 device_initialize(&sdev->sdev_dev);
1159 sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
1160 sdev->sdev_dev.class = &sdev_class;
1161 dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
1162 sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
1163 sdev->scsi_level = starget->scsi_level;
1164 transport_setup_device(&sdev->sdev_gendev);
1165 spin_lock_irqsave(shost->host_lock, flags);
1166 list_add_tail(&sdev->same_target_siblings, &starget->devices);
1167 list_add_tail(&sdev->siblings, &shost->__devices);
1168 spin_unlock_irqrestore(shost->host_lock, flags);
1171 int scsi_is_sdev_device(const struct device *dev)
1173 return dev->type == &scsi_dev_type;
1175 EXPORT_SYMBOL(scsi_is_sdev_device);
1177 /* A blank transport template that is used in drivers that don't
1178 * yet implement Transport Attributes */
1179 struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };