1 /* 2 * device.h - generic, centralized driver model 3 * 4 * Copyright (c) 2001-2003 Patrick Mochel <[email protected]> 5 * Copyright (c) 2004-2009 Greg Kroah-Hartman <[email protected]> 6 * Copyright (c) 2008-2009 Novell Inc. 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 16 #include <linux/ioport.h> 17 #include <linux/kobject.h> 18 #include <linux/klist.h> 19 #include <linux/list.h> 20 #include <linux/lockdep.h> 21 #include <linux/compiler.h> 22 #include <linux/types.h> 23 #include <linux/module.h> 24 #include <linux/pm.h> 25 #include <asm/atomic.h> 26 #include <asm/device.h> 27 28 struct device; 29 struct device_private; 30 struct device_driver; 31 struct driver_private; 32 struct class; 33 struct class_private; 34 struct bus_type; 35 struct bus_type_private; 36 struct device_node; 37 38 struct bus_attribute { 39 struct attribute attr; 40 ssize_t (*show)(struct bus_type *bus, char *buf); 41 ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); 42 }; 43 44 #define BUS_ATTR(_name, _mode, _show, _store) \ 45 struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) 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 *); 50 51 struct bus_type { 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); 64 int (*resume)(struct device *dev); 65 66 const struct dev_pm_ops *pm; 67 68 struct bus_type_private *p; 69 }; 70 71 extern int __must_check bus_register(struct bus_type *bus); 72 extern void bus_unregister(struct bus_type *bus); 73 74 extern int __must_check bus_rescan_devices(struct bus_type *bus); 75 76 /* iterator helpers for buses */ 77 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)); 83 struct device *bus_find_device_by_name(struct bus_type *bus, 84 struct device *start, 85 const char *name); 86 87 int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, 88 void *data, int (*fn)(struct device_driver *, void *)); 89 90 void bus_sort_breadthfirst(struct bus_type *bus, 91 int (*compare)(const struct device *a, 92 const struct device *b)); 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 108 * with the device lock held in the core, so be careful. 109 */ 110 #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ 111 #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ 112 #define BUS_NOTIFY_BIND_DRIVER 0x00000003 /* driver about to be 113 bound */ 114 #define BUS_NOTIFY_BOUND_DRIVER 0x00000004 /* driver bound to device */ 115 #define BUS_NOTIFY_UNBIND_DRIVER 0x00000005 /* driver about to be 116 unbound */ 117 #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000006 /* driver is unbound 118 from the device */ 119 120 extern struct kset *bus_get_kset(struct bus_type *bus); 121 extern struct klist *bus_get_device_klist(struct bus_type *bus); 122 123 struct device_driver { 124 const char *name; 125 struct bus_type *bus; 126 127 struct module *owner; 128 const char *mod_name; /* used for built-in modules */ 129 130 bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ 131 132 #if defined(CONFIG_OF) 133 const struct of_device_id *of_match_table; 134 #endif 135 136 int (*probe) (struct device *dev); 137 int (*remove) (struct device *dev); 138 void (*shutdown) (struct device *dev); 139 int (*suspend) (struct device *dev, pm_message_t state); 140 int (*resume) (struct device *dev); 141 const struct attribute_group **groups; 142 143 const struct dev_pm_ops *pm; 144 145 struct driver_private *p; 146 }; 147 148 149 extern int __must_check driver_register(struct device_driver *drv); 150 extern void driver_unregister(struct device_driver *drv); 151 152 extern struct device_driver *get_driver(struct device_driver *drv); 153 extern void put_driver(struct device_driver *drv); 154 extern struct device_driver *driver_find(const char *name, 155 struct bus_type *bus); 156 extern int driver_probe_done(void); 157 extern void wait_for_device_probe(void); 158 159 160 /* sysfs interface for exporting driver attributes */ 161 162 struct driver_attribute { 163 struct attribute attr; 164 ssize_t (*show)(struct device_driver *driver, char *buf); 165 ssize_t (*store)(struct device_driver *driver, const char *buf, 166 size_t count); 167 }; 168 169 #define DRIVER_ATTR(_name, _mode, _show, _store) \ 170 struct driver_attribute driver_attr_##_name = \ 171 __ATTR(_name, _mode, _show, _store) 172 173 extern int __must_check driver_create_file(struct device_driver *driver, 174 const struct driver_attribute *attr); 175 extern void driver_remove_file(struct device_driver *driver, 176 const struct driver_attribute *attr); 177 178 extern int __must_check driver_add_kobj(struct device_driver *drv, 179 struct kobject *kobj, 180 const char *fmt, ...); 181 182 extern int __must_check driver_for_each_device(struct device_driver *drv, 183 struct device *start, 184 void *data, 185 int (*fn)(struct device *dev, 186 void *)); 187 struct device *driver_find_device(struct device_driver *drv, 188 struct device *start, void *data, 189 int (*match)(struct device *dev, void *data)); 190 191 /* 192 * device classes 193 */ 194 struct class { 195 const char *name; 196 struct module *owner; 197 198 struct class_attribute *class_attrs; 199 struct device_attribute *dev_attrs; 200 struct kobject *dev_kobj; 201 202 int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); 203 char *(*devnode)(struct device *dev, mode_t *mode); 204 205 void (*class_release)(struct class *class); 206 void (*dev_release)(struct device *dev); 207 208 int (*suspend)(struct device *dev, pm_message_t state); 209 int (*resume)(struct device *dev); 210 211 const struct kobj_ns_type_operations *ns_type; 212 const void *(*namespace)(struct device *dev); 213 214 const struct dev_pm_ops *pm; 215 216 struct class_private *p; 217 }; 218 219 struct class_dev_iter { 220 struct klist_iter ki; 221 const struct device_type *type; 222 }; 223 224 extern struct kobject *sysfs_dev_block_kobj; 225 extern struct kobject *sysfs_dev_char_kobj; 226 extern int __must_check __class_register(struct class *class, 227 struct lock_class_key *key); 228 extern void class_unregister(struct class *class); 229 230 /* This is a #define to keep the compiler from merging different 231 * instances of the __key variable */ 232 #define class_register(class) \ 233 ({ \ 234 static struct lock_class_key __key; \ 235 __class_register(class, &__key); \ 236 }) 237 238 struct class_compat; 239 struct class_compat *class_compat_register(const char *name); 240 void class_compat_unregister(struct class_compat *cls); 241 int class_compat_create_link(struct class_compat *cls, struct device *dev, 242 struct device *device_link); 243 void class_compat_remove_link(struct class_compat *cls, struct device *dev, 244 struct device *device_link); 245 246 extern void class_dev_iter_init(struct class_dev_iter *iter, 247 struct class *class, 248 struct device *start, 249 const struct device_type *type); 250 extern struct device *class_dev_iter_next(struct class_dev_iter *iter); 251 extern void class_dev_iter_exit(struct class_dev_iter *iter); 252 253 extern int class_for_each_device(struct class *class, struct device *start, 254 void *data, 255 int (*fn)(struct device *dev, void *data)); 256 extern struct device *class_find_device(struct class *class, 257 struct device *start, void *data, 258 int (*match)(struct device *, void *)); 259 260 struct class_attribute { 261 struct attribute attr; 262 ssize_t (*show)(struct class *class, struct class_attribute *attr, 263 char *buf); 264 ssize_t (*store)(struct class *class, struct class_attribute *attr, 265 const char *buf, size_t count); 266 }; 267 268 #define CLASS_ATTR(_name, _mode, _show, _store) \ 269 struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) 270 271 extern int __must_check class_create_file(struct class *class, 272 const struct class_attribute *attr); 273 extern void class_remove_file(struct class *class, 274 const struct class_attribute *attr); 275 276 /* Simple class attribute that is just a static string */ 277 278 struct class_attribute_string { 279 struct class_attribute attr; 280 char *str; 281 }; 282 283 /* Currently read-only only */ 284 #define _CLASS_ATTR_STRING(_name, _mode, _str) \ 285 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } 286 #define CLASS_ATTR_STRING(_name, _mode, _str) \ 287 struct class_attribute_string class_attr_##_name = \ 288 _CLASS_ATTR_STRING(_name, _mode, _str) 289 290 extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, 291 char *buf); 292 293 struct class_interface { 294 struct list_head node; 295 struct class *class; 296 297 int (*add_dev) (struct device *, struct class_interface *); 298 void (*remove_dev) (struct device *, struct class_interface *); 299 }; 300 301 extern int __must_check class_interface_register(struct class_interface *); 302 extern void class_interface_unregister(struct class_interface *); 303 304 extern struct class * __must_check __class_create(struct module *owner, 305 const char *name, 306 struct lock_class_key *key); 307 extern void class_destroy(struct class *cls); 308 309 /* This is a #define to keep the compiler from merging different 310 * instances of the __key variable */ 311 #define class_create(owner, name) \ 312 ({ \ 313 static struct lock_class_key __key; \ 314 __class_create(owner, name, &__key); \ 315 }) 316 317 /* 318 * The type of device, "struct device" is embedded in. A class 319 * or bus can contain devices of different types 320 * like "partitions" and "disks", "mouse" and "event". 321 * This identifies the device type and carries type-specific 322 * information, equivalent to the kobj_type of a kobject. 323 * If "name" is specified, the uevent will contain it in 324 * the DEVTYPE variable. 325 */ 326 struct device_type { 327 const char *name; 328 const struct attribute_group **groups; 329 int (*uevent)(struct device *dev, struct kobj_uevent_env *env); 330 char *(*devnode)(struct device *dev, mode_t *mode); 331 void (*release)(struct device *dev); 332 333 const struct dev_pm_ops *pm; 334 }; 335 336 /* interface for exporting device attributes */ 337 struct device_attribute { 338 struct attribute attr; 339 ssize_t (*show)(struct device *dev, struct device_attribute *attr, 340 char *buf); 341 ssize_t (*store)(struct device *dev, struct device_attribute *attr, 342 const char *buf, size_t count); 343 }; 344 345 #define DEVICE_ATTR(_name, _mode, _show, _store) \ 346 struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) 347 348 extern int __must_check device_create_file(struct device *device, 349 const struct device_attribute *entry); 350 extern void device_remove_file(struct device *dev, 351 const struct device_attribute *attr); 352 extern int __must_check device_create_bin_file(struct device *dev, 353 const struct bin_attribute *attr); 354 extern void device_remove_bin_file(struct device *dev, 355 const struct bin_attribute *attr); 356 extern int device_schedule_callback_owner(struct device *dev, 357 void (*func)(struct device *dev), struct module *owner); 358 359 /* This is a macro to avoid include problems with THIS_MODULE */ 360 #define device_schedule_callback(dev, func) \ 361 device_schedule_callback_owner(dev, func, THIS_MODULE) 362 363 /* device resource management */ 364 typedef void (*dr_release_t)(struct device *dev, void *res); 365 typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); 366 367 #ifdef CONFIG_DEBUG_DEVRES 368 extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, 369 const char *name); 370 #define devres_alloc(release, size, gfp) \ 371 __devres_alloc(release, size, gfp, #release) 372 #else 373 extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); 374 #endif 375 extern void devres_free(void *res); 376 extern void devres_add(struct device *dev, void *res); 377 extern void *devres_find(struct device *dev, dr_release_t release, 378 dr_match_t match, void *match_data); 379 extern void *devres_get(struct device *dev, void *new_res, 380 dr_match_t match, void *match_data); 381 extern void *devres_remove(struct device *dev, dr_release_t release, 382 dr_match_t match, void *match_data); 383 extern int devres_destroy(struct device *dev, dr_release_t release, 384 dr_match_t match, void *match_data); 385 386 /* devres group */ 387 extern void * __must_check devres_open_group(struct device *dev, void *id, 388 gfp_t gfp); 389 extern void devres_close_group(struct device *dev, void *id); 390 extern void devres_remove_group(struct device *dev, void *id); 391 extern int devres_release_group(struct device *dev, void *id); 392 393 /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ 394 extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); 395 extern void devm_kfree(struct device *dev, void *p); 396 397 struct device_dma_parameters { 398 /* 399 * a low level driver may set these to teach IOMMU code about 400 * sg limitations. 401 */ 402 unsigned int max_segment_size; 403 unsigned long segment_boundary_mask; 404 }; 405 406 struct device { 407 struct device *parent; 408 409 struct device_private *p; 410 411 struct kobject kobj; 412 const char *init_name; /* initial name of the device */ 413 struct device_type *type; 414 415 struct mutex mutex; /* mutex to synchronize calls to 416 * its driver. 417 */ 418 419 struct bus_type *bus; /* type of bus device is on */ 420 struct device_driver *driver; /* which driver has allocated this 421 device */ 422 void *platform_data; /* Platform specific data, device 423 core doesn't touch it */ 424 struct dev_pm_info power; 425 426 #ifdef CONFIG_NUMA 427 int numa_node; /* NUMA node this device is close to */ 428 #endif 429 u64 *dma_mask; /* dma mask (if dma'able device) */ 430 u64 coherent_dma_mask;/* Like dma_mask, but for 431 alloc_coherent mappings as 432 not all hardware supports 433 64 bit addresses for consistent 434 allocations such descriptors. */ 435 436 struct device_dma_parameters *dma_parms; 437 438 struct list_head dma_pools; /* dma pools (if dma'ble) */ 439 440 struct dma_coherent_mem *dma_mem; /* internal for coherent mem 441 override */ 442 /* arch specific additions */ 443 struct dev_archdata archdata; 444 #ifdef CONFIG_OF 445 struct device_node *of_node; 446 #endif 447 448 dev_t devt; /* dev_t, creates the sysfs "dev" */ 449 450 spinlock_t devres_lock; 451 struct list_head devres_head; 452 453 struct klist_node knode_class; 454 struct class *class; 455 const struct attribute_group **groups; /* optional groups */ 456 457 void (*release)(struct device *dev); 458 }; 459 460 /* Get the wakeup routines, which depend on struct device */ 461 #include <linux/pm_wakeup.h> 462 463 static inline const char *dev_name(const struct device *dev) 464 { 465 /* Use the init name until the kobject becomes available */ 466 if (dev->init_name) 467 return dev->init_name; 468 469 return kobject_name(&dev->kobj); 470 } 471 472 extern int dev_set_name(struct device *dev, const char *name, ...) 473 __attribute__((format(printf, 2, 3))); 474 475 #ifdef CONFIG_NUMA 476 static inline int dev_to_node(struct device *dev) 477 { 478 return dev->numa_node; 479 } 480 static inline void set_dev_node(struct device *dev, int node) 481 { 482 dev->numa_node = node; 483 } 484 #else 485 static inline int dev_to_node(struct device *dev) 486 { 487 return -1; 488 } 489 static inline void set_dev_node(struct device *dev, int node) 490 { 491 } 492 #endif 493 494 static inline unsigned int dev_get_uevent_suppress(const struct device *dev) 495 { 496 return dev->kobj.uevent_suppress; 497 } 498 499 static inline void dev_set_uevent_suppress(struct device *dev, int val) 500 { 501 dev->kobj.uevent_suppress = val; 502 } 503 504 static inline int device_is_registered(struct device *dev) 505 { 506 return dev->kobj.state_in_sysfs; 507 } 508 509 static inline void device_enable_async_suspend(struct device *dev) 510 { 511 if (dev->power.status == DPM_ON) 512 dev->power.async_suspend = true; 513 } 514 515 static inline void device_disable_async_suspend(struct device *dev) 516 { 517 if (dev->power.status == DPM_ON) 518 dev->power.async_suspend = false; 519 } 520 521 static inline bool device_async_suspend_enabled(struct device *dev) 522 { 523 return !!dev->power.async_suspend; 524 } 525 526 static inline void device_lock(struct device *dev) 527 { 528 mutex_lock(&dev->mutex); 529 } 530 531 static inline int device_trylock(struct device *dev) 532 { 533 return mutex_trylock(&dev->mutex); 534 } 535 536 static inline void device_unlock(struct device *dev) 537 { 538 mutex_unlock(&dev->mutex); 539 } 540 541 void driver_init(void); 542 543 /* 544 * High level routines for use by the bus drivers 545 */ 546 extern int __must_check device_register(struct device *dev); 547 extern void device_unregister(struct device *dev); 548 extern void device_initialize(struct device *dev); 549 extern int __must_check device_add(struct device *dev); 550 extern void device_del(struct device *dev); 551 extern int device_for_each_child(struct device *dev, void *data, 552 int (*fn)(struct device *dev, void *data)); 553 extern struct device *device_find_child(struct device *dev, void *data, 554 int (*match)(struct device *dev, void *data)); 555 extern int device_rename(struct device *dev, const char *new_name); 556 extern int device_move(struct device *dev, struct device *new_parent, 557 enum dpm_order dpm_order); 558 extern const char *device_get_devnode(struct device *dev, 559 mode_t *mode, const char **tmp); 560 extern void *dev_get_drvdata(const struct device *dev); 561 extern void dev_set_drvdata(struct device *dev, void *data); 562 563 /* 564 * Root device objects for grouping under /sys/devices 565 */ 566 extern struct device *__root_device_register(const char *name, 567 struct module *owner); 568 static inline struct device *root_device_register(const char *name) 569 { 570 return __root_device_register(name, THIS_MODULE); 571 } 572 extern void root_device_unregister(struct device *root); 573 574 static inline void *dev_get_platdata(const struct device *dev) 575 { 576 return dev->platform_data; 577 } 578 579 /* 580 * Manual binding of a device to driver. See drivers/base/bus.c 581 * for information on use. 582 */ 583 extern int __must_check device_bind_driver(struct device *dev); 584 extern void device_release_driver(struct device *dev); 585 extern int __must_check device_attach(struct device *dev); 586 extern int __must_check driver_attach(struct device_driver *drv); 587 extern int __must_check device_reprobe(struct device *dev); 588 589 /* 590 * Easy functions for dynamically creating devices on the fly 591 */ 592 extern struct device *device_create_vargs(struct class *cls, 593 struct device *parent, 594 dev_t devt, 595 void *drvdata, 596 const char *fmt, 597 va_list vargs); 598 extern struct device *device_create(struct class *cls, struct device *parent, 599 dev_t devt, void *drvdata, 600 const char *fmt, ...) 601 __attribute__((format(printf, 5, 6))); 602 extern void device_destroy(struct class *cls, dev_t devt); 603 604 /* 605 * Platform "fixup" functions - allow the platform to have their say 606 * about devices and actions that the general device layer doesn't 607 * know about. 608 */ 609 /* Notify platform of device discovery */ 610 extern int (*platform_notify)(struct device *dev); 611 612 extern int (*platform_notify_remove)(struct device *dev); 613 614 615 /** 616 * get_device - atomically increment the reference count for the device. 617 * 618 */ 619 extern struct device *get_device(struct device *dev); 620 extern void put_device(struct device *dev); 621 622 extern void wait_for_device_probe(void); 623 624 #ifdef CONFIG_DEVTMPFS 625 extern int devtmpfs_create_node(struct device *dev); 626 extern int devtmpfs_delete_node(struct device *dev); 627 extern int devtmpfs_mount(const char *mntdir); 628 #else 629 static inline int devtmpfs_create_node(struct device *dev) { return 0; } 630 static inline int devtmpfs_delete_node(struct device *dev) { return 0; } 631 static inline int devtmpfs_mount(const char *mountpoint) { return 0; } 632 #endif 633 634 /* drivers/base/power/shutdown.c */ 635 extern void device_shutdown(void); 636 637 /* drivers/base/sys.c */ 638 extern void sysdev_shutdown(void); 639 640 /* debugging and troubleshooting/diagnostic helpers. */ 641 extern const char *dev_driver_string(const struct device *dev); 642 643 644 #ifdef CONFIG_PRINTK 645 646 extern int dev_printk(const char *level, const struct device *dev, 647 const char *fmt, ...) 648 __attribute__ ((format (printf, 3, 4))); 649 extern int dev_emerg(const struct device *dev, const char *fmt, ...) 650 __attribute__ ((format (printf, 2, 3))); 651 extern int dev_alert(const struct device *dev, const char *fmt, ...) 652 __attribute__ ((format (printf, 2, 3))); 653 extern int dev_crit(const struct device *dev, const char *fmt, ...) 654 __attribute__ ((format (printf, 2, 3))); 655 extern int dev_err(const struct device *dev, const char *fmt, ...) 656 __attribute__ ((format (printf, 2, 3))); 657 extern int dev_warn(const struct device *dev, const char *fmt, ...) 658 __attribute__ ((format (printf, 2, 3))); 659 extern int dev_notice(const struct device *dev, const char *fmt, ...) 660 __attribute__ ((format (printf, 2, 3))); 661 extern int _dev_info(const struct device *dev, const char *fmt, ...) 662 __attribute__ ((format (printf, 2, 3))); 663 664 #else 665 666 static inline int dev_printk(const char *level, const struct device *dev, 667 const char *fmt, ...) 668 __attribute__ ((format (printf, 3, 4))); 669 static inline int dev_printk(const char *level, const struct device *dev, 670 const char *fmt, ...) 671 { return 0; } 672 673 static inline int dev_emerg(const struct device *dev, const char *fmt, ...) 674 __attribute__ ((format (printf, 2, 3))); 675 static inline int dev_emerg(const struct device *dev, const char *fmt, ...) 676 { return 0; } 677 static inline int dev_crit(const struct device *dev, const char *fmt, ...) 678 __attribute__ ((format (printf, 2, 3))); 679 static inline int dev_crit(const struct device *dev, const char *fmt, ...) 680 { return 0; } 681 static inline int dev_alert(const struct device *dev, const char *fmt, ...) 682 __attribute__ ((format (printf, 2, 3))); 683 static inline int dev_alert(const struct device *dev, const char *fmt, ...) 684 { return 0; } 685 static inline int dev_err(const struct device *dev, const char *fmt, ...) 686 __attribute__ ((format (printf, 2, 3))); 687 static inline int dev_err(const struct device *dev, const char *fmt, ...) 688 { return 0; } 689 static inline int dev_warn(const struct device *dev, const char *fmt, ...) 690 __attribute__ ((format (printf, 2, 3))); 691 static inline int dev_warn(const struct device *dev, const char *fmt, ...) 692 { return 0; } 693 static inline int dev_notice(const struct device *dev, const char *fmt, ...) 694 __attribute__ ((format (printf, 2, 3))); 695 static inline int dev_notice(const struct device *dev, const char *fmt, ...) 696 { return 0; } 697 static inline int _dev_info(const struct device *dev, const char *fmt, ...) 698 __attribute__ ((format (printf, 2, 3))); 699 static inline int _dev_info(const struct device *dev, const char *fmt, ...) 700 { return 0; } 701 702 #endif 703 704 /* 705 * Stupid hackaround for existing uses of non-printk uses dev_info 706 * 707 * Note that the definition of dev_info below is actually _dev_info 708 * and a macro is used to avoid redefining dev_info 709 */ 710 711 #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg) 712 713 #if defined(DEBUG) 714 #define dev_dbg(dev, format, arg...) \ 715 dev_printk(KERN_DEBUG, dev, format, ##arg) 716 #elif defined(CONFIG_DYNAMIC_DEBUG) 717 #define dev_dbg(dev, format, ...) \ 718 do { \ 719 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ 720 } while (0) 721 #else 722 #define dev_dbg(dev, format, arg...) \ 723 ({ \ 724 if (0) \ 725 dev_printk(KERN_DEBUG, dev, format, ##arg); \ 726 0; \ 727 }) 728 #endif 729 730 #ifdef VERBOSE_DEBUG 731 #define dev_vdbg dev_dbg 732 #else 733 #define dev_vdbg(dev, format, arg...) \ 734 ({ \ 735 if (0) \ 736 dev_printk(KERN_DEBUG, dev, format, ##arg); \ 737 0; \ 738 }) 739 #endif 740 741 /* 742 * dev_WARN() acts like dev_printk(), but with the key difference 743 * of using a WARN/WARN_ON to get the message out, including the 744 * file/line information and a backtrace. 745 */ 746 #define dev_WARN(dev, format, arg...) \ 747 WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); 748 749 /* Create alias, so I can be autoloaded. */ 750 #define MODULE_ALIAS_CHARDEV(major,minor) \ 751 MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) 752 #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ 753 MODULE_ALIAS("char-major-" __stringify(major) "-*") 754 755 #ifdef CONFIG_SYSFS_DEPRECATED 756 extern long sysfs_deprecated; 757 #else 758 #define sysfs_deprecated 0 759 #endif 760 761 #endif /* _DEVICE_H_ */ 762