Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scsi_sysfs.c | |
3 | * | |
4 | * SCSI sysfs interface routines. | |
5 | * | |
6 | * Created to pull SCSI mid layer sysfs routines into one file. | |
7 | */ | |
8 | ||
1da177e4 | 9 | #include <linux/module.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
1da177e4 LT |
11 | #include <linux/init.h> |
12 | #include <linux/blkdev.h> | |
13 | #include <linux/device.h> | |
bc4f2401 | 14 | #include <linux/pm_runtime.h> |
1da177e4 LT |
15 | |
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> | |
44818efb | 21 | #include <scsi/scsi_driver.h> |
1da177e4 LT |
22 | |
23 | #include "scsi_priv.h" | |
24 | #include "scsi_logging.h" | |
25 | ||
b0ed4336 HR |
26 | static struct device_type scsi_dev_type; |
27 | ||
0ad78200 | 28 | static const struct { |
1da177e4 LT |
29 | enum scsi_device_state value; |
30 | char *name; | |
31 | } sdev_states[] = { | |
32 | { SDEV_CREATED, "created" }, | |
33 | { SDEV_RUNNING, "running" }, | |
34 | { SDEV_CANCEL, "cancel" }, | |
35 | { SDEV_DEL, "deleted" }, | |
36 | { SDEV_QUIESCE, "quiesce" }, | |
37 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 38 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 39 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 40 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
41 | }; |
42 | ||
43 | const char *scsi_device_state_name(enum scsi_device_state state) | |
44 | { | |
45 | int i; | |
46 | char *name = NULL; | |
47 | ||
6391a113 | 48 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
49 | if (sdev_states[i].value == state) { |
50 | name = sdev_states[i].name; | |
51 | break; | |
52 | } | |
53 | } | |
54 | return name; | |
55 | } | |
56 | ||
0ad78200 | 57 | static const struct { |
d3301874 MA |
58 | enum scsi_host_state value; |
59 | char *name; | |
60 | } shost_states[] = { | |
61 | { SHOST_CREATED, "created" }, | |
62 | { SHOST_RUNNING, "running" }, | |
63 | { SHOST_CANCEL, "cancel" }, | |
64 | { SHOST_DEL, "deleted" }, | |
65 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
66 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
67 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
68 | }; |
69 | const char *scsi_host_state_name(enum scsi_host_state state) | |
70 | { | |
71 | int i; | |
72 | char *name = NULL; | |
73 | ||
6391a113 | 74 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
75 | if (shost_states[i].value == state) { |
76 | name = shost_states[i].name; | |
77 | break; | |
78 | } | |
79 | } | |
80 | return name; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | static int check_set(unsigned int *val, char *src) |
84 | { | |
85 | char *last; | |
86 | ||
87 | if (strncmp(src, "-", 20) == 0) { | |
88 | *val = SCAN_WILD_CARD; | |
89 | } else { | |
90 | /* | |
91 | * Doesn't check for int overflow | |
92 | */ | |
93 | *val = simple_strtoul(src, &last, 0); | |
94 | if (*last != '\0') | |
95 | return 1; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
101 | { | |
102 | char s1[15], s2[15], s3[15], junk; | |
103 | unsigned int channel, id, lun; | |
104 | int res; | |
105 | ||
106 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
107 | if (res != 3) | |
108 | return -EINVAL; | |
109 | if (check_set(&channel, s1)) | |
110 | return -EINVAL; | |
111 | if (check_set(&id, s2)) | |
112 | return -EINVAL; | |
113 | if (check_set(&lun, s3)) | |
114 | return -EINVAL; | |
e02f3f59 CH |
115 | if (shost->transportt->user_scan) |
116 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
117 | else | |
118 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
119 | return res; |
120 | } | |
121 | ||
122 | /* | |
123 | * shost_show_function: macro to create an attr function that can be used to | |
124 | * show a non-bit field. | |
125 | */ | |
126 | #define shost_show_function(name, field, format_string) \ | |
127 | static ssize_t \ | |
ee959b00 TJ |
128 | show_##name (struct device *dev, struct device_attribute *attr, \ |
129 | char *buf) \ | |
1da177e4 | 130 | { \ |
ee959b00 | 131 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
132 | return snprintf (buf, 20, format_string, shost->field); \ |
133 | } | |
134 | ||
135 | /* | |
136 | * shost_rd_attr: macro to create a function and attribute variable for a | |
137 | * read only field. | |
138 | */ | |
139 | #define shost_rd_attr2(name, field, format_string) \ | |
140 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 141 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
142 | |
143 | #define shost_rd_attr(field, format_string) \ | |
144 | shost_rd_attr2(field, field, format_string) | |
145 | ||
146 | /* | |
147 | * Create the actual show/store functions and data structures. | |
148 | */ | |
149 | ||
ee959b00 TJ |
150 | static ssize_t |
151 | store_scan(struct device *dev, struct device_attribute *attr, | |
152 | const char *buf, size_t count) | |
1da177e4 | 153 | { |
ee959b00 | 154 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
155 | int res; |
156 | ||
157 | res = scsi_scan(shost, buf); | |
158 | if (res == 0) | |
159 | res = count; | |
160 | return res; | |
161 | }; | |
ee959b00 | 162 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 163 | |
d3301874 | 164 | static ssize_t |
ee959b00 TJ |
165 | store_shost_state(struct device *dev, struct device_attribute *attr, |
166 | const char *buf, size_t count) | |
d3301874 MA |
167 | { |
168 | int i; | |
ee959b00 | 169 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
170 | enum scsi_host_state state = 0; |
171 | ||
6391a113 | 172 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
173 | const int len = strlen(shost_states[i].name); |
174 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
175 | buf[len] == '\n') { | |
176 | state = shost_states[i].value; | |
177 | break; | |
178 | } | |
179 | } | |
180 | if (!state) | |
181 | return -EINVAL; | |
182 | ||
183 | if (scsi_host_set_state(shost, state)) | |
184 | return -EINVAL; | |
185 | return count; | |
186 | } | |
187 | ||
188 | static ssize_t | |
ee959b00 | 189 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 190 | { |
ee959b00 | 191 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
192 | const char *name = scsi_host_state_name(shost->shost_state); |
193 | ||
194 | if (!name) | |
195 | return -EINVAL; | |
196 | ||
197 | return snprintf(buf, 20, "%s\n", name); | |
198 | } | |
199 | ||
ee959b00 TJ |
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); | |
d3301874 | 203 | |
5dc2b89e FT |
204 | static ssize_t |
205 | show_shost_mode(unsigned int mode, char *buf) | |
206 | { | |
207 | ssize_t len = 0; | |
208 | ||
209 | if (mode & MODE_INITIATOR) | |
210 | len = sprintf(buf, "%s", "Initiator"); | |
211 | ||
212 | if (mode & MODE_TARGET) | |
213 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
214 | ||
215 | len += sprintf(buf + len, "\n"); | |
216 | ||
217 | return len; | |
218 | } | |
219 | ||
ee959b00 TJ |
220 | static ssize_t |
221 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
222 | char *buf) | |
5dc2b89e | 223 | { |
ee959b00 | 224 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 225 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 226 | |
7a39ac3f JB |
227 | if (supported_mode == MODE_UNKNOWN) |
228 | /* by default this should be initiator */ | |
229 | supported_mode = MODE_INITIATOR; | |
230 | ||
231 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
232 | } |
233 | ||
ee959b00 | 234 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 235 | |
ee959b00 TJ |
236 | static ssize_t |
237 | show_shost_active_mode(struct device *dev, | |
238 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 239 | { |
ee959b00 | 240 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
241 | |
242 | if (shost->active_mode == MODE_UNKNOWN) | |
243 | return snprintf(buf, 20, "unknown\n"); | |
244 | else | |
245 | return show_shost_mode(shost->active_mode, buf); | |
246 | } | |
247 | ||
ee959b00 | 248 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 249 | |
072f19b4 | 250 | static int check_reset_type(const char *str) |
29443691 | 251 | { |
072f19b4 | 252 | if (sysfs_streq(str, "adapter")) |
29443691 | 253 | return SCSI_ADAPTER_RESET; |
072f19b4 | 254 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
255 | return SCSI_FIRMWARE_RESET; |
256 | else | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static ssize_t | |
261 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
262 | const char *buf, size_t count) | |
263 | { | |
264 | struct Scsi_Host *shost = class_to_shost(dev); | |
265 | struct scsi_host_template *sht = shost->hostt; | |
266 | int ret = -EINVAL; | |
29443691 VC |
267 | int type; |
268 | ||
072f19b4 | 269 | type = check_reset_type(buf); |
29443691 VC |
270 | if (!type) |
271 | goto exit_store_host_reset; | |
272 | ||
273 | if (sht->host_reset) | |
274 | ret = sht->host_reset(shost, type); | |
275 | ||
276 | exit_store_host_reset: | |
277 | if (ret == 0) | |
278 | ret = count; | |
279 | return ret; | |
280 | } | |
281 | ||
282 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
283 | ||
1da177e4 LT |
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"); | |
ed632da8 | 287 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 288 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 289 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 290 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
291 | shost_rd_attr(prot_capabilities, "%u\n"); |
292 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
293 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
294 | ||
f7120a4f HR |
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, | |
13f05c8d | 301 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
302 | &dev_attr_unchecked_isa_dma.attr, |
303 | &dev_attr_proc_name.attr, | |
304 | &dev_attr_scan.attr, | |
305 | &dev_attr_hstate.attr, | |
306 | &dev_attr_supported_mode.attr, | |
307 | &dev_attr_active_mode.attr, | |
4469f987 MP |
308 | &dev_attr_prot_capabilities.attr, |
309 | &dev_attr_prot_guard_type.attr, | |
29443691 | 310 | &dev_attr_host_reset.attr, |
f7120a4f HR |
311 | NULL |
312 | }; | |
313 | ||
314 | struct attribute_group scsi_shost_attr_group = { | |
315 | .attrs = scsi_sysfs_shost_attrs, | |
316 | }; | |
317 | ||
a4dbd674 | 318 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 319 | &scsi_shost_attr_group, |
1da177e4 LT |
320 | NULL |
321 | }; | |
322 | ||
ee959b00 | 323 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
324 | { |
325 | struct scsi_device *sdev; | |
326 | ||
327 | sdev = class_to_sdev(class_dev); | |
328 | put_device(&sdev->sdev_gendev); | |
329 | } | |
330 | ||
65f27f38 | 331 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
332 | { |
333 | struct scsi_device *sdev; | |
334 | struct device *parent; | |
a341cd0f | 335 | struct list_head *this, *tmp; |
1da177e4 LT |
336 | unsigned long flags; |
337 | ||
65f27f38 DH |
338 | sdev = container_of(work, struct scsi_device, ew.work); |
339 | ||
340 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
341 | |
342 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
343 | list_del(&sdev->siblings); |
344 | list_del(&sdev->same_target_siblings); | |
345 | list_del(&sdev->starved_entry); | |
346 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
347 | ||
a341cd0f JG |
348 | cancel_work_sync(&sdev->event_work); |
349 | ||
350 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
351 | struct scsi_event *evt; | |
352 | ||
353 | evt = list_entry(this, struct scsi_event, node); | |
354 | list_del(&evt->node); | |
355 | kfree(evt); | |
356 | } | |
357 | ||
e73e079b | 358 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
359 | /* NULL queue means the device can't be used */ |
360 | sdev->request_queue = NULL; | |
1da177e4 | 361 | |
1da177e4 LT |
362 | kfree(sdev->inquiry); |
363 | kfree(sdev); | |
364 | ||
365 | if (parent) | |
366 | put_device(parent); | |
367 | } | |
368 | ||
65110b21 JB |
369 | static void scsi_device_dev_release(struct device *dev) |
370 | { | |
ffedb452 | 371 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 372 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 373 | &sdp->ew); |
65110b21 JB |
374 | } |
375 | ||
52c1da39 | 376 | static struct class sdev_class = { |
1da177e4 | 377 | .name = "scsi_device", |
ee959b00 | 378 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
379 | }; |
380 | ||
381 | /* all probing is done in the individual ->probe routines */ | |
382 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
383 | { | |
b0ed4336 HR |
384 | struct scsi_device *sdp; |
385 | ||
386 | if (dev->type != &scsi_dev_type) | |
387 | return 0; | |
388 | ||
389 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
390 | if (sdp->no_uld_attach) |
391 | return 0; | |
392 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
393 | } | |
394 | ||
7eff2e7a | 395 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 396 | { |
1f42ea7b JB |
397 | struct scsi_device *sdev; |
398 | ||
399 | if (dev->type != &scsi_dev_type) | |
400 | return 0; | |
401 | ||
402 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 403 | |
7eff2e7a | 404 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
405 | return 0; |
406 | } | |
407 | ||
1da177e4 LT |
408 | struct bus_type scsi_bus_type = { |
409 | .name = "scsi", | |
410 | .match = scsi_bus_match, | |
d7b8bcb0 | 411 | .uevent = scsi_bus_uevent, |
aa338601 | 412 | #ifdef CONFIG_PM |
db5bd1e0 | 413 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 414 | #endif |
1da177e4 | 415 | }; |
a6a8d9f8 | 416 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
417 | |
418 | int scsi_sysfs_register(void) | |
419 | { | |
420 | int error; | |
421 | ||
422 | error = bus_register(&scsi_bus_type); | |
423 | if (!error) { | |
424 | error = class_register(&sdev_class); | |
425 | if (error) | |
426 | bus_unregister(&scsi_bus_type); | |
427 | } | |
428 | ||
429 | return error; | |
430 | } | |
431 | ||
432 | void scsi_sysfs_unregister(void) | |
433 | { | |
434 | class_unregister(&sdev_class); | |
435 | bus_unregister(&scsi_bus_type); | |
436 | } | |
437 | ||
438 | /* | |
439 | * sdev_show_function: macro to create an attr function that can be used to | |
440 | * show a non-bit field. | |
441 | */ | |
442 | #define sdev_show_function(field, format_string) \ | |
443 | static ssize_t \ | |
ee959b00 TJ |
444 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
445 | char *buf) \ | |
1da177e4 LT |
446 | { \ |
447 | struct scsi_device *sdev; \ | |
448 | sdev = to_scsi_device(dev); \ | |
449 | return snprintf (buf, 20, format_string, sdev->field); \ | |
450 | } \ | |
451 | ||
452 | /* | |
453 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
454 | * read only field. | |
455 | */ | |
456 | #define sdev_rd_attr(field, format_string) \ | |
457 | sdev_show_function(field, format_string) \ | |
458 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
459 | ||
460 | ||
461 | /* | |
160e7f67 | 462 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
463 | * read/write field. |
464 | */ | |
465 | #define sdev_rw_attr(field, format_string) \ | |
466 | sdev_show_function(field, format_string) \ | |
467 | \ | |
468 | static ssize_t \ | |
ee959b00 TJ |
469 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
470 | const char *buf, size_t count) \ | |
1da177e4 LT |
471 | { \ |
472 | struct scsi_device *sdev; \ | |
473 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 474 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
475 | return count; \ |
476 | } \ | |
477 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
478 | ||
479 | /* Currently we don't export bit fields, but we might in future, | |
480 | * so leave this code in */ | |
481 | #if 0 | |
482 | /* | |
483 | * sdev_rd_attr: create a function and attribute variable for a | |
484 | * read/write bit field. | |
485 | */ | |
486 | #define sdev_rw_attr_bit(field) \ | |
487 | sdev_show_function(field, "%d\n") \ | |
488 | \ | |
489 | static ssize_t \ | |
ee959b00 TJ |
490 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
491 | const char *buf, size_t count) \ | |
1da177e4 LT |
492 | { \ |
493 | int ret; \ | |
494 | struct scsi_device *sdev; \ | |
495 | ret = scsi_sdev_check_buf_bit(buf); \ | |
496 | if (ret >= 0) { \ | |
497 | sdev = to_scsi_device(dev); \ | |
498 | sdev->field = ret; \ | |
499 | ret = count; \ | |
500 | } \ | |
501 | return ret; \ | |
502 | } \ | |
503 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
504 | ||
505 | /* | |
506 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
507 | * else return -EINVAL. | |
508 | */ | |
509 | static int scsi_sdev_check_buf_bit(const char *buf) | |
510 | { | |
511 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
512 | if (buf[0] == '1') | |
513 | return 1; | |
514 | else if (buf[0] == '0') | |
515 | return 0; | |
516 | else | |
517 | return -EINVAL; | |
518 | } else | |
519 | return -EINVAL; | |
520 | } | |
521 | #endif | |
522 | /* | |
523 | * Create the actual show/store functions and data structures. | |
524 | */ | |
525 | sdev_rd_attr (device_blocked, "%d\n"); | |
526 | sdev_rd_attr (queue_depth, "%d\n"); | |
527 | sdev_rd_attr (type, "%d\n"); | |
528 | sdev_rd_attr (scsi_level, "%d\n"); | |
529 | sdev_rd_attr (vendor, "%.8s\n"); | |
530 | sdev_rd_attr (model, "%.16s\n"); | |
531 | sdev_rd_attr (rev, "%.4s\n"); | |
532 | ||
242f9dcb JA |
533 | /* |
534 | * TODO: can we make these symlinks to the block layer ones? | |
535 | */ | |
1da177e4 | 536 | static ssize_t |
10523b3b | 537 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
538 | { |
539 | struct scsi_device *sdev; | |
540 | sdev = to_scsi_device(dev); | |
242f9dcb | 541 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
542 | } |
543 | ||
544 | static ssize_t | |
ee959b00 TJ |
545 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
546 | const char *buf, size_t count) | |
1da177e4 LT |
547 | { |
548 | struct scsi_device *sdev; | |
549 | int timeout; | |
550 | sdev = to_scsi_device(dev); | |
551 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 552 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
553 | return count; |
554 | } | |
555 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
556 | ||
557 | static ssize_t | |
ee959b00 TJ |
558 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
559 | const char *buf, size_t count) | |
1da177e4 LT |
560 | { |
561 | scsi_rescan_device(dev); | |
562 | return count; | |
563 | } | |
564 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
565 | ||
d9a9cdfb AS |
566 | static void sdev_store_delete_callback(struct device *dev) |
567 | { | |
568 | scsi_remove_device(to_scsi_device(dev)); | |
569 | } | |
570 | ||
ee959b00 TJ |
571 | static ssize_t |
572 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
573 | const char *buf, size_t count) | |
1da177e4 | 574 | { |
d9a9cdfb AS |
575 | int rc; |
576 | ||
577 | /* An attribute cannot be unregistered by one of its own methods, | |
578 | * so we have to use this roundabout approach. | |
579 | */ | |
580 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
581 | if (rc) | |
582 | count = rc; | |
1da177e4 LT |
583 | return count; |
584 | }; | |
585 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
586 | ||
587 | static ssize_t | |
ee959b00 TJ |
588 | store_state_field(struct device *dev, struct device_attribute *attr, |
589 | const char *buf, size_t count) | |
1da177e4 LT |
590 | { |
591 | int i; | |
592 | struct scsi_device *sdev = to_scsi_device(dev); | |
593 | enum scsi_device_state state = 0; | |
594 | ||
6391a113 | 595 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
596 | const int len = strlen(sdev_states[i].name); |
597 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
598 | buf[len] == '\n') { | |
599 | state = sdev_states[i].value; | |
600 | break; | |
601 | } | |
602 | } | |
603 | if (!state) | |
604 | return -EINVAL; | |
605 | ||
606 | if (scsi_device_set_state(sdev, state)) | |
607 | return -EINVAL; | |
608 | return count; | |
609 | } | |
610 | ||
611 | static ssize_t | |
10523b3b | 612 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
613 | { |
614 | struct scsi_device *sdev = to_scsi_device(dev); | |
615 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
616 | ||
617 | if (!name) | |
618 | return -EINVAL; | |
619 | ||
620 | return snprintf(buf, 20, "%s\n", name); | |
621 | } | |
622 | ||
623 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
624 | ||
625 | static ssize_t | |
ee959b00 TJ |
626 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
627 | char *buf) | |
1da177e4 LT |
628 | { |
629 | struct scsi_device *sdev = to_scsi_device(dev); | |
630 | const char *name = "none"; | |
631 | ||
632 | if (sdev->ordered_tags) | |
633 | name = "ordered"; | |
634 | else if (sdev->simple_tags) | |
635 | name = "simple"; | |
636 | ||
637 | return snprintf(buf, 20, "%s\n", name); | |
638 | } | |
639 | ||
640 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
641 | ||
642 | static ssize_t | |
ee959b00 | 643 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
644 | { |
645 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
646 | } | |
647 | ||
648 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
649 | ||
650 | #define show_sdev_iostat(field) \ | |
651 | static ssize_t \ | |
ee959b00 TJ |
652 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
653 | char *buf) \ | |
1da177e4 LT |
654 | { \ |
655 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
656 | unsigned long long count = atomic_read(&sdev->field); \ | |
657 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
658 | } \ | |
659 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
660 | ||
661 | show_sdev_iostat(iorequest_cnt); | |
662 | show_sdev_iostat(iodone_cnt); | |
663 | show_sdev_iostat(ioerr_cnt); | |
664 | ||
d7b8bcb0 MT |
665 | static ssize_t |
666 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
667 | { | |
668 | struct scsi_device *sdev; | |
669 | sdev = to_scsi_device(dev); | |
670 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
671 | } | |
672 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 673 | |
a341cd0f JG |
674 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
675 | static ssize_t \ | |
676 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 677 | char *buf) \ |
a341cd0f JG |
678 | { \ |
679 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
680 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
681 | return snprintf(buf, 20, "%d\n", val); \ | |
682 | } | |
683 | ||
684 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
685 | static ssize_t \ | |
ee959b00 | 686 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
687 | const char *buf, size_t count) \ |
688 | { \ | |
689 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
690 | int val = simple_strtoul(buf, NULL, 0); \ | |
691 | if (val == 0) \ | |
692 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
693 | else if (val == 1) \ | |
694 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
695 | else \ | |
696 | return -EINVAL; \ | |
697 | return count; \ | |
698 | } | |
699 | ||
700 | #define DECLARE_EVT(name, Cap_name) \ | |
701 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
702 | DECLARE_EVT_STORE(name, Cap_name) \ | |
703 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
704 | sdev_store_evt_##name); | |
705 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
706 | ||
707 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
708 | ||
1da177e4 | 709 | /* Default template for device attributes. May NOT be modified */ |
bfd12944 KS |
710 | static struct attribute *scsi_sdev_attrs[] = { |
711 | &dev_attr_device_blocked.attr, | |
712 | &dev_attr_type.attr, | |
713 | &dev_attr_scsi_level.attr, | |
714 | &dev_attr_vendor.attr, | |
715 | &dev_attr_model.attr, | |
716 | &dev_attr_rev.attr, | |
717 | &dev_attr_rescan.attr, | |
718 | &dev_attr_delete.attr, | |
719 | &dev_attr_state.attr, | |
720 | &dev_attr_timeout.attr, | |
721 | &dev_attr_iocounterbits.attr, | |
722 | &dev_attr_iorequest_cnt.attr, | |
723 | &dev_attr_iodone_cnt.attr, | |
724 | &dev_attr_ioerr_cnt.attr, | |
725 | &dev_attr_modalias.attr, | |
a341cd0f | 726 | REF_EVT(media_change), |
bfd12944 KS |
727 | NULL |
728 | }; | |
729 | ||
730 | static struct attribute_group scsi_sdev_attr_group = { | |
731 | .attrs = scsi_sdev_attrs, | |
732 | }; | |
733 | ||
a4dbd674 | 734 | static const struct attribute_group *scsi_sdev_attr_groups[] = { |
bfd12944 | 735 | &scsi_sdev_attr_group, |
1da177e4 LT |
736 | NULL |
737 | }; | |
738 | ||
ee959b00 TJ |
739 | static ssize_t |
740 | sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, | |
741 | const char *buf, size_t count) | |
1da177e4 LT |
742 | { |
743 | int depth, retval; | |
744 | struct scsi_device *sdev = to_scsi_device(dev); | |
745 | struct scsi_host_template *sht = sdev->host->hostt; | |
746 | ||
747 | if (!sht->change_queue_depth) | |
748 | return -EINVAL; | |
749 | ||
750 | depth = simple_strtoul(buf, NULL, 0); | |
751 | ||
752 | if (depth < 1) | |
753 | return -EINVAL; | |
754 | ||
e881a172 MC |
755 | retval = sht->change_queue_depth(sdev, depth, |
756 | SCSI_QDEPTH_DEFAULT); | |
1da177e4 LT |
757 | if (retval < 0) |
758 | return retval; | |
759 | ||
4a84067d VD |
760 | sdev->max_queue_depth = sdev->queue_depth; |
761 | ||
1da177e4 LT |
762 | return count; |
763 | } | |
764 | ||
765 | static struct device_attribute sdev_attr_queue_depth_rw = | |
766 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
767 | sdev_store_queue_depth_rw); | |
768 | ||
4a84067d VD |
769 | static ssize_t |
770 | sdev_show_queue_ramp_up_period(struct device *dev, | |
771 | struct device_attribute *attr, | |
772 | char *buf) | |
773 | { | |
774 | struct scsi_device *sdev; | |
775 | sdev = to_scsi_device(dev); | |
776 | return snprintf(buf, 20, "%u\n", | |
777 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
778 | } | |
779 | ||
780 | static ssize_t | |
781 | sdev_store_queue_ramp_up_period(struct device *dev, | |
782 | struct device_attribute *attr, | |
783 | const char *buf, size_t count) | |
784 | { | |
785 | struct scsi_device *sdev = to_scsi_device(dev); | |
786 | unsigned long period; | |
787 | ||
788 | if (strict_strtoul(buf, 10, &period)) | |
789 | return -EINVAL; | |
790 | ||
791 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
792 | return period; | |
793 | } | |
794 | ||
795 | static struct device_attribute sdev_attr_queue_ramp_up_period = | |
796 | __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, | |
797 | sdev_show_queue_ramp_up_period, | |
798 | sdev_store_queue_ramp_up_period); | |
799 | ||
ee959b00 TJ |
800 | static ssize_t |
801 | sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, | |
802 | const char *buf, size_t count) | |
1da177e4 LT |
803 | { |
804 | struct scsi_device *sdev = to_scsi_device(dev); | |
805 | struct scsi_host_template *sht = sdev->host->hostt; | |
806 | int tag_type = 0, retval; | |
807 | int prev_tag_type = scsi_get_tag_type(sdev); | |
808 | ||
809 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
810 | return -EINVAL; | |
811 | ||
812 | if (strncmp(buf, "ordered", 7) == 0) | |
813 | tag_type = MSG_ORDERED_TAG; | |
814 | else if (strncmp(buf, "simple", 6) == 0) | |
815 | tag_type = MSG_SIMPLE_TAG; | |
816 | else if (strncmp(buf, "none", 4) != 0) | |
817 | return -EINVAL; | |
818 | ||
819 | if (tag_type == prev_tag_type) | |
820 | return count; | |
821 | ||
822 | retval = sht->change_queue_type(sdev, tag_type); | |
823 | if (retval < 0) | |
824 | return retval; | |
825 | ||
826 | return count; | |
827 | } | |
828 | ||
643eb2d9 JB |
829 | static int scsi_target_add(struct scsi_target *starget) |
830 | { | |
831 | int error; | |
832 | ||
833 | if (starget->state != STARGET_CREATED) | |
834 | return 0; | |
835 | ||
836 | error = device_add(&starget->dev); | |
837 | if (error) { | |
838 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
839 | return error; |
840 | } | |
841 | transport_add_device(&starget->dev); | |
842 | starget->state = STARGET_RUNNING; | |
843 | ||
bc4f2401 AS |
844 | pm_runtime_set_active(&starget->dev); |
845 | pm_runtime_enable(&starget->dev); | |
846 | device_enable_async_suspend(&starget->dev); | |
847 | ||
643eb2d9 JB |
848 | return 0; |
849 | } | |
850 | ||
1da177e4 LT |
851 | static struct device_attribute sdev_attr_queue_type_rw = |
852 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
853 | sdev_store_queue_type_rw); | |
854 | ||
1da177e4 LT |
855 | /** |
856 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
857 | * @sdev: scsi_device to add | |
858 | * | |
859 | * Return value: | |
860 | * 0 on Success / non-zero on Failure | |
861 | **/ | |
862 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
863 | { | |
864 | int error, i; | |
80ed71ce | 865 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 866 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 867 | |
ee37e09d AS |
868 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
869 | if (error) | |
1da177e4 LT |
870 | return error; |
871 | ||
643eb2d9 JB |
872 | error = scsi_target_add(starget); |
873 | if (error) | |
874 | return error; | |
875 | ||
876 | transport_configure_device(&starget->dev); | |
bc4f2401 | 877 | |
4cb077d9 | 878 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
879 | scsi_autopm_get_target(starget); |
880 | pm_runtime_set_active(&sdev->sdev_gendev); | |
881 | pm_runtime_forbid(&sdev->sdev_gendev); | |
882 | pm_runtime_enable(&sdev->sdev_gendev); | |
883 | scsi_autopm_put_target(starget); | |
884 | ||
885 | /* The following call will keep sdev active indefinitely, until | |
886 | * its driver does a corresponding scsi_autopm_pm_device(). Only | |
887 | * drivers supporting autosuspend will do this. | |
888 | */ | |
889 | scsi_autopm_get_device(sdev); | |
890 | ||
1da177e4 LT |
891 | error = device_add(&sdev->sdev_gendev); |
892 | if (error) { | |
73d8c34f AS |
893 | sdev_printk(KERN_INFO, sdev, |
894 | "failed to add device: %d\n", error); | |
ee37e09d | 895 | return error; |
1da177e4 | 896 | } |
4cb077d9 | 897 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 898 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 899 | if (error) { |
73d8c34f AS |
900 | sdev_printk(KERN_INFO, sdev, |
901 | "failed to add class device: %d\n", error); | |
860dc736 | 902 | device_del(&sdev->sdev_gendev); |
ee37e09d | 903 | return error; |
1da177e4 | 904 | } |
860dc736 JB |
905 | transport_add_device(&sdev->sdev_gendev); |
906 | sdev->is_visible = 1; | |
1da177e4 | 907 | |
bfd12944 | 908 | /* create queue files, which may be writable, depending on the host */ |
4a84067d VD |
909 | if (sdev->host->hostt->change_queue_depth) { |
910 | error = device_create_file(&sdev->sdev_gendev, | |
911 | &sdev_attr_queue_depth_rw); | |
912 | error = device_create_file(&sdev->sdev_gendev, | |
913 | &sdev_attr_queue_ramp_up_period); | |
914 | } | |
bfd12944 KS |
915 | else |
916 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); | |
860dc736 | 917 | if (error) |
ee37e09d | 918 | return error; |
860dc736 | 919 | |
bfd12944 KS |
920 | if (sdev->host->hostt->change_queue_type) |
921 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); | |
922 | else | |
923 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); | |
860dc736 | 924 | if (error) |
ee37e09d | 925 | return error; |
bfd12944 | 926 | |
97f46ae4 | 927 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
928 | |
929 | if (error) | |
860dc736 JB |
930 | /* we're treating error on bsg register as non-fatal, |
931 | * so pretend nothing went wrong */ | |
80ed71ce JB |
932 | sdev_printk(KERN_INFO, sdev, |
933 | "Failed to register bsg queue, errno=%d\n", error); | |
934 | ||
bfd12944 | 935 | /* add additional host specific attributes */ |
1da177e4 LT |
936 | if (sdev->host->hostt->sdev_attrs) { |
937 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 938 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 939 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 940 | if (error) |
ee37e09d | 941 | return error; |
1da177e4 LT |
942 | } |
943 | } | |
1da177e4 | 944 | |
1da177e4 LT |
945 | return error; |
946 | } | |
947 | ||
903f4fed | 948 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 949 | { |
df133c21 JB |
950 | struct device *dev = &sdev->sdev_gendev; |
951 | ||
860dc736 JB |
952 | if (sdev->is_visible) { |
953 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
954 | return; | |
1da177e4 | 955 | |
860dc736 JB |
956 | bsg_unregister_queue(sdev->request_queue); |
957 | device_unregister(&sdev->sdev_dev); | |
958 | transport_remove_device(dev); | |
959 | device_del(dev); | |
960 | } else | |
961 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
962 | |
963 | /* | |
964 | * Stop accepting new requests and wait until all queuecommand() and | |
965 | * scsi_run_queue() invocations have finished before tearing down the | |
966 | * device. | |
967 | */ | |
1da177e4 | 968 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
969 | blk_cleanup_queue(sdev->request_queue); |
970 | cancel_work_sync(&sdev->requeue_work); | |
971 | ||
1da177e4 LT |
972 | if (sdev->host->hostt->slave_destroy) |
973 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 974 | transport_destroy_device(dev); |
86cbfb56 | 975 | |
c3c8d397 JB |
976 | /* |
977 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
978 | * remoed sysfs visibility from the device, so make the target | |
979 | * invisible if this was the last device underneath it. | |
980 | */ | |
981 | scsi_target_reap(scsi_target(sdev)); | |
982 | ||
df133c21 | 983 | put_device(dev); |
903f4fed AS |
984 | } |
985 | ||
986 | /** | |
987 | * scsi_remove_device - unregister a device from the scsi bus | |
988 | * @sdev: scsi_device to unregister | |
989 | **/ | |
990 | void scsi_remove_device(struct scsi_device *sdev) | |
991 | { | |
54195002 AS |
992 | struct Scsi_Host *shost = sdev->host; |
993 | ||
0b950672 | 994 | mutex_lock(&shost->scan_mutex); |
903f4fed | 995 | __scsi_remove_device(sdev); |
0b950672 | 996 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
997 | } |
998 | EXPORT_SYMBOL(scsi_remove_device); | |
999 | ||
44818efb | 1000 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1001 | { |
1002 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1003 | unsigned long flags; | |
a64358db | 1004 | struct scsi_device *sdev; |
1da177e4 LT |
1005 | |
1006 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1007 | restart: |
1008 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1009 | if (sdev->channel != starget->channel || |
a64358db | 1010 | sdev->id != starget->id || |
546ae796 | 1011 | scsi_device_get(sdev)) |
1da177e4 LT |
1012 | continue; |
1013 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1014 | scsi_remove_device(sdev); | |
546ae796 | 1015 | scsi_device_put(sdev); |
1da177e4 | 1016 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1017 | goto restart; |
1da177e4 LT |
1018 | } |
1019 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 PM |
1020 | } |
1021 | ||
1da177e4 LT |
1022 | /** |
1023 | * scsi_remove_target - try to remove a target and all its devices | |
1024 | * @dev: generic starget or parent of generic stargets to be removed | |
1025 | * | |
1026 | * Note: This is slightly racy. It is possible that if the user | |
1027 | * requests the addition of another device then the target won't be | |
1028 | * removed. | |
1029 | */ | |
1030 | void scsi_remove_target(struct device *dev) | |
1031 | { | |
3b661a92 | 1032 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
2544cce1 | 1033 | struct scsi_target *starget; |
3b661a92 DW |
1034 | unsigned long flags; |
1035 | ||
2544cce1 | 1036 | restart: |
3b661a92 DW |
1037 | spin_lock_irqsave(shost->host_lock, flags); |
1038 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
1039 | if (starget->state == STARGET_DEL) | |
1040 | continue; | |
1041 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
c3c8d397 | 1042 | kref_get(&starget->reap_ref); |
bc3f02a7 | 1043 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1044 | __scsi_remove_target(starget); |
2544cce1 CH |
1045 | scsi_target_reap(starget); |
1046 | goto restart; | |
3b661a92 | 1047 | } |
1da177e4 | 1048 | } |
3b661a92 | 1049 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1050 | } |
1051 | EXPORT_SYMBOL(scsi_remove_target); | |
1052 | ||
1053 | int scsi_register_driver(struct device_driver *drv) | |
1054 | { | |
1055 | drv->bus = &scsi_bus_type; | |
1056 | ||
1057 | return driver_register(drv); | |
1058 | } | |
1059 | EXPORT_SYMBOL(scsi_register_driver); | |
1060 | ||
1061 | int scsi_register_interface(struct class_interface *intf) | |
1062 | { | |
1063 | intf->class = &sdev_class; | |
1064 | ||
1065 | return class_interface_register(intf); | |
1066 | } | |
1067 | EXPORT_SYMBOL(scsi_register_interface); | |
1068 | ||
1da177e4 LT |
1069 | /** |
1070 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1071 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1072 | **/ |
1073 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1074 | { | |
1075 | int error, i; | |
1076 | ||
f7120a4f | 1077 | /* add host specific attributes */ |
1da177e4 LT |
1078 | if (shost->hostt->shost_attrs) { |
1079 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1080 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1081 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1082 | if (error) |
1083 | return error; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1088 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1089 | return 0; |
1090 | } | |
1091 | ||
bfd12944 KS |
1092 | static struct device_type scsi_dev_type = { |
1093 | .name = "scsi_device", | |
1094 | .release = scsi_device_dev_release, | |
1095 | .groups = scsi_sdev_attr_groups, | |
1096 | }; | |
1097 | ||
1da177e4 LT |
1098 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1099 | { | |
1100 | unsigned long flags; | |
1101 | struct Scsi_Host *shost = sdev->host; | |
1102 | struct scsi_target *starget = sdev->sdev_target; | |
1103 | ||
1104 | device_initialize(&sdev->sdev_gendev); | |
1105 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1106 | sdev->sdev_gendev.type = &scsi_dev_type; |
71610f55 KS |
1107 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d", |
1108 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
1109 | ||
ee959b00 | 1110 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1111 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1112 | sdev->sdev_dev.class = &sdev_class; |
71610f55 KS |
1113 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d", |
1114 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 1115 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
1116 | transport_setup_device(&sdev->sdev_gendev); |
1117 | spin_lock_irqsave(shost->host_lock, flags); | |
1118 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1119 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1120 | spin_unlock_irqrestore(shost->host_lock, flags); | |
c3c8d397 JB |
1121 | /* |
1122 | * device can now only be removed via __scsi_remove_device() so hold | |
1123 | * the target. Target will be held in CREATED state until something | |
1124 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1125 | */ | |
1126 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | int scsi_is_sdev_device(const struct device *dev) | |
1130 | { | |
13ba9bcb | 1131 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1132 | } |
1133 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1134 | ||
1135 | /* A blank transport template that is used in drivers that don't | |
1136 | * yet implement Transport Attributes */ | |
1137 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |