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1da177e4 LT |
1 | /* |
2 | * device.h - generic, centralized driver model | |
3 | * | |
4 | * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org> | |
b4028437 GKH |
5 | * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de> |
6 | * Copyright (c) 2008-2009 Novell Inc. | |
1da177e4 LT |
7 | * |
8 | * This file is released under the GPLv2 | |
9 | * | |
10 | * See Documentation/driver-model/ for more information. | |
11 | */ | |
12 | ||
13 | #ifndef _DEVICE_H_ | |
14 | #define _DEVICE_H_ | |
15 | ||
1da177e4 LT |
16 | #include <linux/ioport.h> |
17 | #include <linux/kobject.h> | |
465c7a3a | 18 | #include <linux/klist.h> |
1da177e4 | 19 | #include <linux/list.h> |
d2a3b914 | 20 | #include <linux/lockdep.h> |
4a7fb636 | 21 | #include <linux/compiler.h> |
1da177e4 LT |
22 | #include <linux/types.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/pm.h> | |
1da177e4 | 25 | #include <asm/atomic.h> |
c6dbaef2 | 26 | #include <asm/device.h> |
1da177e4 | 27 | |
1da177e4 | 28 | struct device; |
fb069a5d | 29 | struct device_private; |
1da177e4 | 30 | struct device_driver; |
e5dd1278 | 31 | struct driver_private; |
1da177e4 | 32 | struct class; |
7c71448b | 33 | struct class_private; |
b8c5cec2 | 34 | struct bus_type; |
c6f7e72a | 35 | struct bus_type_private; |
d706c1b0 | 36 | struct device_node; |
b8c5cec2 KS |
37 | |
38 | struct bus_attribute { | |
39 | struct attribute attr; | |
d462943a GKH |
40 | ssize_t (*show)(struct bus_type *bus, char *buf); |
41 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); | |
b8c5cec2 KS |
42 | }; |
43 | ||
d462943a GKH |
44 | #define BUS_ATTR(_name, _mode, _show, _store) \ |
45 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
b8c5cec2 KS |
46 | |
47 | extern int __must_check bus_create_file(struct bus_type *, | |
48 | struct bus_attribute *); | |
49 | extern void bus_remove_file(struct bus_type *, struct bus_attribute *); | |
1da177e4 LT |
50 | |
51 | struct bus_type { | |
d462943a GKH |
52 | const char *name; |
53 | struct bus_attribute *bus_attrs; | |
54 | struct device_attribute *dev_attrs; | |
55 | struct driver_attribute *drv_attrs; | |
56 | ||
57 | int (*match)(struct device *dev, struct device_driver *drv); | |
58 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
59 | int (*probe)(struct device *dev); | |
60 | int (*remove)(struct device *dev); | |
61 | void (*shutdown)(struct device *dev); | |
62 | ||
63 | int (*suspend)(struct device *dev, pm_message_t state); | |
d462943a | 64 | int (*resume)(struct device *dev); |
b8c5cec2 | 65 | |
8150f32b | 66 | const struct dev_pm_ops *pm; |
1eede070 | 67 | |
c6f7e72a | 68 | struct bus_type_private *p; |
1da177e4 LT |
69 | }; |
70 | ||
d462943a GKH |
71 | extern int __must_check bus_register(struct bus_type *bus); |
72 | extern void bus_unregister(struct bus_type *bus); | |
1da177e4 | 73 | |
d462943a | 74 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
1da177e4 | 75 | |
1da177e4 LT |
76 | /* iterator helpers for buses */ |
77 | ||
d462943a GKH |
78 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
79 | int (*fn)(struct device *dev, void *data)); | |
80 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
81 | void *data, | |
82 | int (*match)(struct device *dev, void *data)); | |
1f9ffc04 GKH |
83 | struct device *bus_find_device_by_name(struct bus_type *bus, |
84 | struct device *start, | |
85 | const char *name); | |
1da177e4 | 86 | |
cc7447a5 JD |
87 | int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, |
88 | void *data, int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 89 | |
99178b03 GKH |
90 | void bus_sort_breadthfirst(struct bus_type *bus, |
91 | int (*compare)(const struct device *a, | |
92 | const struct device *b)); | |
116af378 BH |
93 | /* |
94 | * Bus notifiers: Get notified of addition/removal of devices | |
95 | * and binding/unbinding of drivers to devices. | |
96 | * In the long run, it should be a replacement for the platform | |
97 | * notify hooks. | |
98 | */ | |
99 | struct notifier_block; | |
100 | ||
101 | extern int bus_register_notifier(struct bus_type *bus, | |
102 | struct notifier_block *nb); | |
103 | extern int bus_unregister_notifier(struct bus_type *bus, | |
104 | struct notifier_block *nb); | |
105 | ||
106 | /* All 4 notifers below get called with the target struct device * | |
107 | * as an argument. Note that those functions are likely to be called | |
8e9394ce | 108 | * with the device lock held in the core, so be careful. |
116af378 BH |
109 | */ |
110 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
111 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
112 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
113 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
114 | unbound */ | |
309b7d60 JR |
115 | #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound |
116 | from the device */ | |
116af378 | 117 | |
0fed80f7 | 118 | extern struct kset *bus_get_kset(struct bus_type *bus); |
b249072e | 119 | extern struct klist *bus_get_device_klist(struct bus_type *bus); |
0fed80f7 | 120 | |
1da177e4 | 121 | struct device_driver { |
e5dd1278 GKH |
122 | const char *name; |
123 | struct bus_type *bus; | |
1da177e4 | 124 | |
e5dd1278 | 125 | struct module *owner; |
1a6f2a75 DT |
126 | const char *mod_name; /* used for built-in modules */ |
127 | ||
128 | bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ | |
1da177e4 | 129 | |
597b9d1e GL |
130 | #if defined(CONFIG_OF) |
131 | const struct of_device_id *of_match_table; | |
132 | #endif | |
133 | ||
d462943a GKH |
134 | int (*probe) (struct device *dev); |
135 | int (*remove) (struct device *dev); | |
136 | void (*shutdown) (struct device *dev); | |
137 | int (*suspend) (struct device *dev, pm_message_t state); | |
138 | int (*resume) (struct device *dev); | |
a4dbd674 | 139 | const struct attribute_group **groups; |
e5dd1278 | 140 | |
8150f32b | 141 | const struct dev_pm_ops *pm; |
1eede070 | 142 | |
e5dd1278 | 143 | struct driver_private *p; |
1da177e4 LT |
144 | }; |
145 | ||
146 | ||
d462943a GKH |
147 | extern int __must_check driver_register(struct device_driver *drv); |
148 | extern void driver_unregister(struct device_driver *drv); | |
1da177e4 | 149 | |
d462943a GKH |
150 | extern struct device_driver *get_driver(struct device_driver *drv); |
151 | extern void put_driver(struct device_driver *drv); | |
152 | extern struct device_driver *driver_find(const char *name, | |
153 | struct bus_type *bus); | |
d779249e | 154 | extern int driver_probe_done(void); |
b23530eb | 155 | extern void wait_for_device_probe(void); |
216773a7 | 156 | |
1da177e4 | 157 | |
405ae7d3 | 158 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
159 | |
160 | struct driver_attribute { | |
d462943a GKH |
161 | struct attribute attr; |
162 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
163 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
164 | size_t count); | |
1da177e4 LT |
165 | }; |
166 | ||
d462943a GKH |
167 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
168 | struct driver_attribute driver_attr_##_name = \ | |
169 | __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 170 | |
d462943a | 171 | extern int __must_check driver_create_file(struct device_driver *driver, |
099c2f21 | 172 | const struct driver_attribute *attr); |
d462943a | 173 | extern void driver_remove_file(struct device_driver *driver, |
099c2f21 | 174 | const struct driver_attribute *attr); |
1da177e4 | 175 | |
cbe9c595 GKH |
176 | extern int __must_check driver_add_kobj(struct device_driver *drv, |
177 | struct kobject *kobj, | |
178 | const char *fmt, ...); | |
179 | ||
d462943a GKH |
180 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
181 | struct device *start, | |
182 | void *data, | |
183 | int (*fn)(struct device *dev, | |
184 | void *)); | |
185 | struct device *driver_find_device(struct device_driver *drv, | |
186 | struct device *start, void *data, | |
187 | int (*match)(struct device *dev, void *data)); | |
fae3cd00 | 188 | |
1da177e4 LT |
189 | /* |
190 | * device classes | |
191 | */ | |
192 | struct class { | |
d462943a GKH |
193 | const char *name; |
194 | struct module *owner; | |
1da177e4 | 195 | |
d462943a | 196 | struct class_attribute *class_attrs; |
d462943a | 197 | struct device_attribute *dev_attrs; |
e105b8bf | 198 | struct kobject *dev_kobj; |
1da177e4 | 199 | |
d462943a | 200 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
e454cea2 | 201 | char *(*devnode)(struct device *dev, mode_t *mode); |
1da177e4 | 202 | |
d462943a GKH |
203 | void (*class_release)(struct class *class); |
204 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 205 | |
d462943a GKH |
206 | int (*suspend)(struct device *dev, pm_message_t state); |
207 | int (*resume)(struct device *dev); | |
1eede070 | 208 | |
bc451f20 EB |
209 | const struct kobj_ns_type_operations *ns_type; |
210 | const void *(*namespace)(struct device *dev); | |
211 | ||
8150f32b DT |
212 | const struct dev_pm_ops *pm; |
213 | ||
7c71448b | 214 | struct class_private *p; |
1da177e4 LT |
215 | }; |
216 | ||
5a3ceb86 TH |
217 | struct class_dev_iter { |
218 | struct klist_iter ki; | |
219 | const struct device_type *type; | |
220 | }; | |
221 | ||
e105b8bf DW |
222 | extern struct kobject *sysfs_dev_block_kobj; |
223 | extern struct kobject *sysfs_dev_char_kobj; | |
d2a3b914 MW |
224 | extern int __must_check __class_register(struct class *class, |
225 | struct lock_class_key *key); | |
d462943a | 226 | extern void class_unregister(struct class *class); |
d2a3b914 MW |
227 | |
228 | /* This is a #define to keep the compiler from merging different | |
229 | * instances of the __key variable */ | |
230 | #define class_register(class) \ | |
231 | ({ \ | |
232 | static struct lock_class_key __key; \ | |
233 | __class_register(class, &__key); \ | |
234 | }) | |
235 | ||
46227094 JD |
236 | struct class_compat; |
237 | struct class_compat *class_compat_register(const char *name); | |
238 | void class_compat_unregister(struct class_compat *cls); | |
239 | int class_compat_create_link(struct class_compat *cls, struct device *dev, | |
240 | struct device *device_link); | |
241 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, | |
242 | struct device *device_link); | |
243 | ||
5a3ceb86 TH |
244 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
245 | struct class *class, | |
246 | struct device *start, | |
247 | const struct device_type *type); | |
248 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
249 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
250 | ||
93562b53 GKH |
251 | extern int class_for_each_device(struct class *class, struct device *start, |
252 | void *data, | |
fd04897b | 253 | int (*fn)(struct device *dev, void *data)); |
695794ae GKH |
254 | extern struct device *class_find_device(struct class *class, |
255 | struct device *start, void *data, | |
fd04897b | 256 | int (*match)(struct device *, void *)); |
1da177e4 LT |
257 | |
258 | struct class_attribute { | |
d462943a | 259 | struct attribute attr; |
28812fe1 AK |
260 | ssize_t (*show)(struct class *class, struct class_attribute *attr, |
261 | char *buf); | |
262 | ssize_t (*store)(struct class *class, struct class_attribute *attr, | |
263 | const char *buf, size_t count); | |
1da177e4 LT |
264 | }; |
265 | ||
d462943a GKH |
266 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
267 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 268 | |
d462943a GKH |
269 | extern int __must_check class_create_file(struct class *class, |
270 | const struct class_attribute *attr); | |
271 | extern void class_remove_file(struct class *class, | |
272 | const struct class_attribute *attr); | |
1da177e4 | 273 | |
869dfc87 AK |
274 | /* Simple class attribute that is just a static string */ |
275 | ||
276 | struct class_attribute_string { | |
277 | struct class_attribute attr; | |
278 | char *str; | |
279 | }; | |
280 | ||
281 | /* Currently read-only only */ | |
282 | #define _CLASS_ATTR_STRING(_name, _mode, _str) \ | |
283 | { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } | |
284 | #define CLASS_ATTR_STRING(_name, _mode, _str) \ | |
285 | struct class_attribute_string class_attr_##_name = \ | |
286 | _CLASS_ATTR_STRING(_name, _mode, _str) | |
287 | ||
288 | extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, | |
289 | char *buf); | |
290 | ||
1da177e4 LT |
291 | struct class_interface { |
292 | struct list_head node; | |
293 | struct class *class; | |
294 | ||
c47ed219 GKH |
295 | int (*add_dev) (struct device *, struct class_interface *); |
296 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
297 | }; |
298 | ||
4a7fb636 | 299 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
300 | extern void class_interface_unregister(struct class_interface *); |
301 | ||
d2a3b914 MW |
302 | extern struct class * __must_check __class_create(struct module *owner, |
303 | const char *name, | |
304 | struct lock_class_key *key); | |
e9ba6365 | 305 | extern void class_destroy(struct class *cls); |
e9ba6365 | 306 | |
d2a3b914 MW |
307 | /* This is a #define to keep the compiler from merging different |
308 | * instances of the __key variable */ | |
309 | #define class_create(owner, name) \ | |
310 | ({ \ | |
311 | static struct lock_class_key __key; \ | |
312 | __class_create(owner, name, &__key); \ | |
313 | }) | |
314 | ||
414264f9 KS |
315 | /* |
316 | * The type of device, "struct device" is embedded in. A class | |
317 | * or bus can contain devices of different types | |
318 | * like "partitions" and "disks", "mouse" and "event". | |
319 | * This identifies the device type and carries type-specific | |
320 | * information, equivalent to the kobj_type of a kobject. | |
321 | * If "name" is specified, the uevent will contain it in | |
322 | * the DEVTYPE variable. | |
323 | */ | |
f9f852df | 324 | struct device_type { |
414264f9 | 325 | const char *name; |
a4dbd674 | 326 | const struct attribute_group **groups; |
7eff2e7a | 327 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
e454cea2 | 328 | char *(*devnode)(struct device *dev, mode_t *mode); |
f9f852df | 329 | void (*release)(struct device *dev); |
1eede070 | 330 | |
8150f32b | 331 | const struct dev_pm_ops *pm; |
f9f852df KS |
332 | }; |
333 | ||
a7fd6706 KS |
334 | /* interface for exporting device attributes */ |
335 | struct device_attribute { | |
336 | struct attribute attr; | |
337 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
338 | char *buf); | |
339 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
340 | const char *buf, size_t count); | |
341 | }; | |
342 | ||
d462943a GKH |
343 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
344 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
a7fd6706 | 345 | |
4a7fb636 | 346 | extern int __must_check device_create_file(struct device *device, |
66ecb92b | 347 | const struct device_attribute *entry); |
d462943a | 348 | extern void device_remove_file(struct device *dev, |
26579ab7 | 349 | const struct device_attribute *attr); |
2589f188 | 350 | extern int __must_check device_create_bin_file(struct device *dev, |
66ecb92b | 351 | const struct bin_attribute *attr); |
2589f188 | 352 | extern void device_remove_bin_file(struct device *dev, |
66ecb92b | 353 | const struct bin_attribute *attr); |
523ded71 | 354 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 355 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
356 | |
357 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
358 | #define device_schedule_callback(dev, func) \ | |
359 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
360 | |
361 | /* device resource management */ | |
362 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
363 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
364 | ||
365 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 366 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
367 | const char *name); |
368 | #define devres_alloc(release, size, gfp) \ | |
369 | __devres_alloc(release, size, gfp, #release) | |
370 | #else | |
d462943a | 371 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e TH |
372 | #endif |
373 | extern void devres_free(void *res); | |
374 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 375 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 376 | dr_match_t match, void *match_data); |
d462943a GKH |
377 | extern void *devres_get(struct device *dev, void *new_res, |
378 | dr_match_t match, void *match_data); | |
379 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
380 | dr_match_t match, void *match_data); | |
9ac7849e TH |
381 | extern int devres_destroy(struct device *dev, dr_release_t release, |
382 | dr_match_t match, void *match_data); | |
383 | ||
384 | /* devres group */ | |
385 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
386 | gfp_t gfp); | |
387 | extern void devres_close_group(struct device *dev, void *id); | |
388 | extern void devres_remove_group(struct device *dev, void *id); | |
389 | extern int devres_release_group(struct device *dev, void *id); | |
390 | ||
391 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
392 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
393 | extern void devm_kfree(struct device *dev, void *p); | |
394 | ||
6b7b6510 FT |
395 | struct device_dma_parameters { |
396 | /* | |
397 | * a low level driver may set these to teach IOMMU code about | |
398 | * sg limitations. | |
399 | */ | |
400 | unsigned int max_segment_size; | |
401 | unsigned long segment_boundary_mask; | |
402 | }; | |
403 | ||
1da177e4 | 404 | struct device { |
49a4ec18 | 405 | struct device *parent; |
1da177e4 | 406 | |
fb069a5d GKH |
407 | struct device_private *p; |
408 | ||
1da177e4 | 409 | struct kobject kobj; |
c906a48a | 410 | const char *init_name; /* initial name of the device */ |
f9f852df | 411 | struct device_type *type; |
1da177e4 | 412 | |
3142788b | 413 | struct mutex mutex; /* mutex to synchronize calls to |
af70316a PM |
414 | * its driver. |
415 | */ | |
416 | ||
d462943a | 417 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
418 | struct device_driver *driver; /* which driver has allocated this |
419 | device */ | |
e67c8562 GKH |
420 | void *platform_data; /* Platform specific data, device |
421 | core doesn't touch it */ | |
1da177e4 LT |
422 | struct dev_pm_info power; |
423 | ||
87348136 CH |
424 | #ifdef CONFIG_NUMA |
425 | int numa_node; /* NUMA node this device is close to */ | |
426 | #endif | |
1da177e4 LT |
427 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
428 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
429 | alloc_coherent mappings as | |
430 | not all hardware supports | |
431 | 64 bit addresses for consistent | |
432 | allocations such descriptors. */ | |
433 | ||
6b7b6510 FT |
434 | struct device_dma_parameters *dma_parms; |
435 | ||
1da177e4 LT |
436 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
437 | ||
438 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
439 | override */ | |
c6dbaef2 BH |
440 | /* arch specific additions */ |
441 | struct dev_archdata archdata; | |
d706c1b0 GL |
442 | #ifdef CONFIG_OF |
443 | struct device_node *of_node; | |
444 | #endif | |
1da177e4 | 445 | |
929d2fa5 MW |
446 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
447 | ||
9ac7849e TH |
448 | spinlock_t devres_lock; |
449 | struct list_head devres_head; | |
450 | ||
5a3ceb86 | 451 | struct klist_node knode_class; |
b7a3e813 | 452 | struct class *class; |
a4dbd674 | 453 | const struct attribute_group **groups; /* optional groups */ |
23681e47 | 454 | |
d462943a | 455 | void (*release)(struct device *dev); |
1da177e4 LT |
456 | }; |
457 | ||
9a3df1f7 AS |
458 | /* Get the wakeup routines, which depend on struct device */ |
459 | #include <linux/pm_wakeup.h> | |
460 | ||
bf9ca69f | 461 | static inline const char *dev_name(const struct device *dev) |
06916639 | 462 | { |
a636ee7f PM |
463 | /* Use the init name until the kobject becomes available */ |
464 | if (dev->init_name) | |
465 | return dev->init_name; | |
466 | ||
1fa5ae85 | 467 | return kobject_name(&dev->kobj); |
06916639 KS |
468 | } |
469 | ||
413c239f SR |
470 | extern int dev_set_name(struct device *dev, const char *name, ...) |
471 | __attribute__((format(printf, 2, 3))); | |
472 | ||
87348136 CH |
473 | #ifdef CONFIG_NUMA |
474 | static inline int dev_to_node(struct device *dev) | |
475 | { | |
476 | return dev->numa_node; | |
477 | } | |
478 | static inline void set_dev_node(struct device *dev, int node) | |
479 | { | |
480 | dev->numa_node = node; | |
481 | } | |
482 | #else | |
483 | static inline int dev_to_node(struct device *dev) | |
484 | { | |
485 | return -1; | |
486 | } | |
487 | static inline void set_dev_node(struct device *dev, int node) | |
488 | { | |
489 | } | |
490 | #endif | |
491 | ||
f67f129e ML |
492 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) |
493 | { | |
494 | return dev->kobj.uevent_suppress; | |
495 | } | |
496 | ||
497 | static inline void dev_set_uevent_suppress(struct device *dev, int val) | |
498 | { | |
499 | dev->kobj.uevent_suppress = val; | |
500 | } | |
501 | ||
d305ef5d DR |
502 | static inline int device_is_registered(struct device *dev) |
503 | { | |
3f62e570 | 504 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
505 | } |
506 | ||
5af84b82 RW |
507 | static inline void device_enable_async_suspend(struct device *dev) |
508 | { | |
509 | if (dev->power.status == DPM_ON) | |
510 | dev->power.async_suspend = true; | |
511 | } | |
512 | ||
5a2eb858 RW |
513 | static inline void device_disable_async_suspend(struct device *dev) |
514 | { | |
515 | if (dev->power.status == DPM_ON) | |
516 | dev->power.async_suspend = false; | |
517 | } | |
518 | ||
519 | static inline bool device_async_suspend_enabled(struct device *dev) | |
520 | { | |
521 | return !!dev->power.async_suspend; | |
522 | } | |
523 | ||
8e9394ce GKH |
524 | static inline void device_lock(struct device *dev) |
525 | { | |
3142788b | 526 | mutex_lock(&dev->mutex); |
8e9394ce GKH |
527 | } |
528 | ||
529 | static inline int device_trylock(struct device *dev) | |
530 | { | |
3142788b | 531 | return mutex_trylock(&dev->mutex); |
8e9394ce GKH |
532 | } |
533 | ||
534 | static inline void device_unlock(struct device *dev) | |
535 | { | |
3142788b | 536 | mutex_unlock(&dev->mutex); |
8e9394ce GKH |
537 | } |
538 | ||
1f21782e AB |
539 | void driver_init(void); |
540 | ||
1da177e4 LT |
541 | /* |
542 | * High level routines for use by the bus drivers | |
543 | */ | |
d462943a GKH |
544 | extern int __must_check device_register(struct device *dev); |
545 | extern void device_unregister(struct device *dev); | |
546 | extern void device_initialize(struct device *dev); | |
547 | extern int __must_check device_add(struct device *dev); | |
548 | extern void device_del(struct device *dev); | |
549 | extern int device_for_each_child(struct device *dev, void *data, | |
550 | int (*fn)(struct device *dev, void *data)); | |
551 | extern struct device *device_find_child(struct device *dev, void *data, | |
552 | int (*match)(struct device *dev, void *data)); | |
a2de48ca | 553 | extern int device_rename(struct device *dev, char *new_name); |
ffa6a705 CH |
554 | extern int device_move(struct device *dev, struct device *new_parent, |
555 | enum dpm_order dpm_order); | |
e454cea2 KS |
556 | extern const char *device_get_devnode(struct device *dev, |
557 | mode_t *mode, const char **tmp); | |
b4028437 GKH |
558 | extern void *dev_get_drvdata(const struct device *dev); |
559 | extern void dev_set_drvdata(struct device *dev, void *data); | |
1da177e4 | 560 | |
0aa0dc41 MM |
561 | /* |
562 | * Root device objects for grouping under /sys/devices | |
563 | */ | |
564 | extern struct device *__root_device_register(const char *name, | |
565 | struct module *owner); | |
566 | static inline struct device *root_device_register(const char *name) | |
567 | { | |
568 | return __root_device_register(name, THIS_MODULE); | |
569 | } | |
570 | extern void root_device_unregister(struct device *root); | |
571 | ||
a5b8b1ad MB |
572 | static inline void *dev_get_platdata(const struct device *dev) |
573 | { | |
574 | return dev->platform_data; | |
575 | } | |
576 | ||
1da177e4 LT |
577 | /* |
578 | * Manual binding of a device to driver. See drivers/base/bus.c | |
579 | * for information on use. | |
580 | */ | |
f86db396 | 581 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
582 | extern void device_release_driver(struct device *dev); |
583 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
584 | extern int __must_check driver_attach(struct device_driver *drv); |
585 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 586 | |
23681e47 GKH |
587 | /* |
588 | * Easy functions for dynamically creating devices on the fly | |
589 | */ | |
8882b394 GKH |
590 | extern struct device *device_create_vargs(struct class *cls, |
591 | struct device *parent, | |
592 | dev_t devt, | |
593 | void *drvdata, | |
594 | const char *fmt, | |
595 | va_list vargs); | |
4e106739 GKH |
596 | extern struct device *device_create(struct class *cls, struct device *parent, |
597 | dev_t devt, void *drvdata, | |
598 | const char *fmt, ...) | |
8882b394 | 599 | __attribute__((format(printf, 5, 6))); |
23681e47 | 600 | extern void device_destroy(struct class *cls, dev_t devt); |
1da177e4 | 601 | |
1da177e4 LT |
602 | /* |
603 | * Platform "fixup" functions - allow the platform to have their say | |
604 | * about devices and actions that the general device layer doesn't | |
605 | * know about. | |
606 | */ | |
607 | /* Notify platform of device discovery */ | |
d462943a | 608 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 609 | |
d462943a | 610 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
611 | |
612 | ||
613 | /** | |
614 | * get_device - atomically increment the reference count for the device. | |
615 | * | |
616 | */ | |
d462943a GKH |
617 | extern struct device *get_device(struct device *dev); |
618 | extern void put_device(struct device *dev); | |
1da177e4 | 619 | |
d4d5291c | 620 | extern void wait_for_device_probe(void); |
1da177e4 | 621 | |
2b2af54a KS |
622 | #ifdef CONFIG_DEVTMPFS |
623 | extern int devtmpfs_create_node(struct device *dev); | |
624 | extern int devtmpfs_delete_node(struct device *dev); | |
073120cc | 625 | extern int devtmpfs_mount(const char *mntdir); |
2b2af54a KS |
626 | #else |
627 | static inline int devtmpfs_create_node(struct device *dev) { return 0; } | |
628 | static inline int devtmpfs_delete_node(struct device *dev) { return 0; } | |
629 | static inline int devtmpfs_mount(const char *mountpoint) { return 0; } | |
630 | #endif | |
631 | ||
116f232b | 632 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
633 | extern void device_shutdown(void); |
634 | ||
58b3b71d RW |
635 | /* drivers/base/sys.c */ |
636 | extern void sysdev_shutdown(void); | |
637 | ||
1da177e4 | 638 | /* debugging and troubleshooting/diagnostic helpers. */ |
bf9ca69f | 639 | extern const char *dev_driver_string(const struct device *dev); |
99bcf217 JP |
640 | |
641 | ||
642 | #ifdef CONFIG_PRINTK | |
643 | ||
644 | extern int dev_printk(const char *level, const struct device *dev, | |
645 | const char *fmt, ...) | |
646 | __attribute__ ((format (printf, 3, 4))); | |
647 | extern int dev_emerg(const struct device *dev, const char *fmt, ...) | |
648 | __attribute__ ((format (printf, 2, 3))); | |
649 | extern int dev_alert(const struct device *dev, const char *fmt, ...) | |
650 | __attribute__ ((format (printf, 2, 3))); | |
651 | extern int dev_crit(const struct device *dev, const char *fmt, ...) | |
652 | __attribute__ ((format (printf, 2, 3))); | |
653 | extern int dev_err(const struct device *dev, const char *fmt, ...) | |
654 | __attribute__ ((format (printf, 2, 3))); | |
655 | extern int dev_warn(const struct device *dev, const char *fmt, ...) | |
656 | __attribute__ ((format (printf, 2, 3))); | |
657 | extern int dev_notice(const struct device *dev, const char *fmt, ...) | |
658 | __attribute__ ((format (printf, 2, 3))); | |
659 | extern int _dev_info(const struct device *dev, const char *fmt, ...) | |
660 | __attribute__ ((format (printf, 2, 3))); | |
661 | ||
662 | #else | |
663 | ||
664 | static inline int dev_printk(const char *level, const struct device *dev, | |
665 | const char *fmt, ...) | |
666 | __attribute__ ((format (printf, 3, 4))); | |
667 | static inline int dev_printk(const char *level, const struct device *dev, | |
668 | const char *fmt, ...) | |
669 | { return 0; } | |
670 | ||
671 | static inline int dev_emerg(const struct device *dev, const char *fmt, ...) | |
672 | __attribute__ ((format (printf, 2, 3))); | |
673 | static inline int dev_emerg(const struct device *dev, const char *fmt, ...) | |
674 | { return 0; } | |
675 | static inline int dev_crit(const struct device *dev, const char *fmt, ...) | |
676 | __attribute__ ((format (printf, 2, 3))); | |
677 | static inline int dev_crit(const struct device *dev, const char *fmt, ...) | |
678 | { return 0; } | |
679 | static inline int dev_alert(const struct device *dev, const char *fmt, ...) | |
680 | __attribute__ ((format (printf, 2, 3))); | |
681 | static inline int dev_alert(const struct device *dev, const char *fmt, ...) | |
682 | { return 0; } | |
683 | static inline int dev_err(const struct device *dev, const char *fmt, ...) | |
684 | __attribute__ ((format (printf, 2, 3))); | |
685 | static inline int dev_err(const struct device *dev, const char *fmt, ...) | |
686 | { return 0; } | |
687 | static inline int dev_warn(const struct device *dev, const char *fmt, ...) | |
688 | __attribute__ ((format (printf, 2, 3))); | |
689 | static inline int dev_warn(const struct device *dev, const char *fmt, ...) | |
690 | { return 0; } | |
691 | static inline int dev_notice(const struct device *dev, const char *fmt, ...) | |
692 | __attribute__ ((format (printf, 2, 3))); | |
693 | static inline int dev_notice(const struct device *dev, const char *fmt, ...) | |
694 | { return 0; } | |
695 | static inline int _dev_info(const struct device *dev, const char *fmt, ...) | |
696 | __attribute__ ((format (printf, 2, 3))); | |
697 | static inline int _dev_info(const struct device *dev, const char *fmt, ...) | |
698 | { return 0; } | |
699 | ||
700 | #endif | |
701 | ||
702 | /* | |
703 | * Stupid hackaround for existing uses of non-printk uses dev_info | |
704 | * | |
705 | * Note that the definition of dev_info below is actually _dev_info | |
706 | * and a macro is used to avoid redefining dev_info | |
707 | */ | |
708 | ||
709 | #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg) | |
7b8712e5 | 710 | |
d0d85ff9 CH |
711 | #if defined(DEBUG) |
712 | #define dev_dbg(dev, format, arg...) \ | |
99bcf217 | 713 | dev_printk(KERN_DEBUG, dev, format, ##arg) |
e9d376f0 | 714 | #elif defined(CONFIG_DYNAMIC_DEBUG) |
99bcf217 JP |
715 | #define dev_dbg(dev, format, ...) \ |
716 | do { \ | |
346e15be | 717 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ |
99bcf217 | 718 | } while (0) |
1da177e4 | 719 | #else |
99bcf217 JP |
720 | #define dev_dbg(dev, format, arg...) \ |
721 | ({ \ | |
722 | if (0) \ | |
723 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
724 | 0; \ | |
725 | }) | |
1da177e4 LT |
726 | #endif |
727 | ||
aebdc3b4 DB |
728 | #ifdef VERBOSE_DEBUG |
729 | #define dev_vdbg dev_dbg | |
730 | #else | |
99bcf217 JP |
731 | #define dev_vdbg(dev, format, arg...) \ |
732 | ({ \ | |
733 | if (0) \ | |
734 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
735 | 0; \ | |
736 | }) | |
aebdc3b4 DB |
737 | #endif |
738 | ||
e6139662 AV |
739 | /* |
740 | * dev_WARN() acts like dev_printk(), but with the key difference | |
741 | * of using a WARN/WARN_ON to get the message out, including the | |
742 | * file/line information and a backtrace. | |
743 | */ | |
744 | #define dev_WARN(dev, format, arg...) \ | |
745 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
746 | ||
1da177e4 LT |
747 | /* Create alias, so I can be autoloaded. */ |
748 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
749 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
750 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
751 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
752 | #endif /* _DEVICE_H_ */ |