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 subsys_private; 34 struct bus_type; 35 struct device_node; 36 37 struct bus_attribute { 38 struct attribute attr; 39 ssize_t (*show)(struct bus_type *bus, char *buf); 40 ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); 41 }; 42 43 #define BUS_ATTR(_name, _mode, _show, _store) \ 44 struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) 45 46 extern int __must_check bus_create_file(struct bus_type *, 47 struct bus_attribute *); 48 extern void bus_remove_file(struct bus_type *, struct bus_attribute *); 49 50 struct bus_type { 51 const char *name; 52 struct bus_attribute *bus_attrs; 53 struct device_attribute *dev_attrs; 54 struct driver_attribute *drv_attrs; 55 56 int (*match)(struct device *dev, struct device_driver *drv); 57 int (*uevent)(struct device *dev, struct kobj_uevent_env *env); 58 int (*probe)(struct device *dev); 59 int (*remove)(struct device *dev); 60 void (*shutdown)(struct device *dev); 61 62 int (*suspend)(struct device *dev, pm_message_t state); 63 int (*resume)(struct device *dev); 64 65 const struct dev_pm_ops *pm; 66 67 struct subsys_private *p; 68 }; 69 70 extern int __must_check bus_register(struct bus_type *bus); 71 extern void bus_unregister(struct bus_type *bus); 72 73 extern int __must_check bus_rescan_devices(struct bus_type *bus); 74 75 /* iterator helpers for buses */ 76 77 int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, 78 int (*fn)(struct device *dev, void *data)); 79 struct device *bus_find_device(struct bus_type *bus, struct device *start, 80 void *data, 81 int (*match)(struct device *dev, void *data)); 82 struct device *bus_find_device_by_name(struct bus_type *bus, 83 struct device *start, 84 const char *name); 85 86 int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, 87 void *data, int (*fn)(struct device_driver *, void *)); 88 89 void bus_sort_breadthfirst(struct bus_type *bus, 90 int (*compare)(const struct device *a, 91 const struct device *b)); 92 /* 93 * Bus notifiers: Get notified of addition/removal of devices 94 * and binding/unbinding of drivers to devices. 95 * In the long run, it should be a replacement for the platform 96 * notify hooks. 97 */ 98 struct notifier_block; 99 100 extern int bus_register_notifier(struct bus_type *bus, 101 struct notifier_block *nb); 102 extern int bus_unregister_notifier(struct bus_type *bus, 103 struct notifier_block *nb); 104 105 /* All 4 notifers below get called with the target struct device * 106 * as an argument. Note that those functions are likely to be called 107 * with the device lock held in the core, so be careful. 108 */ 109 #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ 110 #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ 111 #define BUS_NOTIFY_BIND_DRIVER 0x00000003 /* driver about to be 112 bound */ 113 #define BUS_NOTIFY_BOUND_DRIVER 0x00000004 /* driver bound to device */ 114 #define BUS_NOTIFY_UNBIND_DRIVER 0x00000005 /* driver about to be 115 unbound */ 116 #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000006 /* driver is unbound 117 from the device */ 118 119 extern struct kset *bus_get_kset(struct bus_type *bus); 120 extern struct klist *bus_get_device_klist(struct bus_type *bus); 121 122 struct device_driver { 123 const char *name; 124 struct bus_type *bus; 125 126 struct module *owner; 127 const char *mod_name; /* used for built-in modules */ 128 129 bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ 130 131 const struct of_device_id *of_match_table; 132 133 int (*probe) (struct device *dev); 134 int (*remove) (struct device *dev); 135 void (*shutdown) (struct device *dev); 136 int (*suspend) (struct device *dev, pm_message_t state); 137 int (*resume) (struct device *dev); 138 const struct attribute_group **groups; 139 140 const struct dev_pm_ops *pm; 141 142 struct driver_private *p; 143 }; 144 145 146 extern int __must_check driver_register(struct device_driver *drv); 147 extern void driver_unregister(struct device_driver *drv); 148 149 extern struct device_driver *get_driver(struct device_driver *drv); 150 extern void put_driver(struct device_driver *drv); 151 extern struct device_driver *driver_find(const char *name, 152 struct bus_type *bus); 153 extern int driver_probe_done(void); 154 extern void wait_for_device_probe(void); 155 156 157 /* sysfs interface for exporting driver attributes */ 158 159 struct driver_attribute { 160 struct attribute attr; 161 ssize_t (*show)(struct device_driver *driver, char *buf); 162 ssize_t (*store)(struct device_driver *driver, const char *buf, 163 size_t count); 164 }; 165 166 #define DRIVER_ATTR(_name, _mode, _show, _store) \ 167 struct driver_attribute driver_attr_##_name = \ 168 __ATTR(_name, _mode, _show, _store) 169 170 extern int __must_check driver_create_file(struct device_driver *driver, 171 const struct driver_attribute *attr); 172 extern void driver_remove_file(struct device_driver *driver, 173 const struct driver_attribute *attr); 174 175 extern int __must_check driver_add_kobj(struct device_driver *drv, 176 struct kobject *kobj, 177 const char *fmt, ...); 178 179 extern int __must_check driver_for_each_device(struct device_driver *drv, 180 struct device *start, 181 void *data, 182 int (*fn)(struct device *dev, 183 void *)); 184 struct device *driver_find_device(struct device_driver *drv, 185 struct device *start, void *data, 186 int (*match)(struct device *dev, void *data)); 187 188 /* 189 * device classes 190 */ 191 struct class { 192 const char *name; 193 struct module *owner; 194 195 struct class_attribute *class_attrs; 196 struct device_attribute *dev_attrs; 197 struct bin_attribute *dev_bin_attrs; 198 struct kobject *dev_kobj; 199 200 int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); 201 char *(*devnode)(struct device *dev, mode_t *mode); 202 203 void (*class_release)(struct class *class); 204 void (*dev_release)(struct device *dev); 205 206 int (*suspend)(struct device *dev, pm_message_t state); 207 int (*resume)(struct device *dev); 208 209 const struct kobj_ns_type_operations *ns_type; 210 const void *(*namespace)(struct device *dev); 211 212 const struct dev_pm_ops *pm; 213 214 struct subsys_private *p; 215 }; 216 217 struct class_dev_iter { 218 struct klist_iter ki; 219 const struct device_type *type; 220 }; 221 222 extern struct kobject *sysfs_dev_block_kobj; 223 extern struct kobject *sysfs_dev_char_kobj; 224 extern int __must_check __class_register(struct class *class, 225 struct lock_class_key *key); 226 extern void class_unregister(struct class *class); 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 }) 235 236 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); 243 244 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); 250 251 extern int class_for_each_device(struct class *class, struct device *start, 252 void *data, 253 int (*fn)(struct device *dev, void *data)); 254 extern struct device *class_find_device(struct class *class, 255 struct device *start, void *data, 256 int (*match)(struct device *, void *)); 257 258 struct class_attribute { 259 struct attribute attr; 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); 264 }; 265 266 #define CLASS_ATTR(_name, _mode, _show, _store) \ 267 struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) 268 269 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); 273 274 /* 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); 290 291 struct class_interface { 292 struct list_head node; 293 struct class *class; 294 295 int (*add_dev) (struct device *, struct class_interface *); 296 void (*remove_dev) (struct device *, struct class_interface *); 297 }; 298 299 extern int __must_check class_interface_register(struct class_interface *); 300 extern void class_interface_unregister(struct class_interface *); 301 302 extern struct class * __must_check __class_create(struct module *owner, 303 const char *name, 304 struct lock_class_key *key); 305 extern void class_destroy(struct class *cls); 306 307 /* 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 }) 314 315 /* 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 */ 324 struct device_type { 325 const char *name; 326 const struct attribute_group **groups; 327 int (*uevent)(struct device *dev, struct kobj_uevent_env *env); 328 char *(*devnode)(struct device *dev, mode_t *mode); 329 void (*release)(struct device *dev); 330 331 const struct dev_pm_ops *pm; 332 }; 333 334 /* 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 }; 342 343 #define DEVICE_ATTR(_name, _mode, _show, _store) \ 344 struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) 345 346 extern int __must_check device_create_file(struct device *device, 347 const struct device_attribute *entry); 348 extern void device_remove_file(struct device *dev, 349 const struct device_attribute *attr); 350 extern int __must_check device_create_bin_file(struct device *dev, 351 const struct bin_attribute *attr); 352 extern void device_remove_bin_file(struct device *dev, 353 const struct bin_attribute *attr); 354 extern int device_schedule_callback_owner(struct device *dev, 355 void (*func)(struct device *dev), struct module *owner); 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) 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 366 extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, 367 const char *name); 368 #define devres_alloc(release, size, gfp) \ 369 __devres_alloc(release, size, gfp, #release) 370 #else 371 extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); 372 #endif 373 extern void devres_free(void *res); 374 extern void devres_add(struct device *dev, void *res); 375 extern void *devres_find(struct device *dev, dr_release_t release, 376 dr_match_t match, void *match_data); 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); 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); 394 395 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 }; 403 404 struct device { 405 struct device *parent; 406 407 struct device_private *p; 408 409 struct kobject kobj; 410 const char *init_name; /* initial name of the device */ 411 struct device_type *type; 412 413 struct mutex mutex; /* mutex to synchronize calls to 414 * its driver. 415 */ 416 417 struct bus_type *bus; /* type of bus device is on */ 418 struct device_driver *driver; /* which driver has allocated this 419 device */ 420 void *platform_data; /* Platform specific data, device 421 core doesn't touch it */ 422 struct dev_pm_info power; 423 struct dev_power_domain *pwr_domain; 424 425 #ifdef CONFIG_NUMA 426 int numa_node; /* NUMA node this device is close to */ 427 #endif 428 u64 *dma_mask; /* dma mask (if dma'able device) */ 429 u64 coherent_dma_mask;/* Like dma_mask, but for 430 alloc_coherent mappings as 431 not all hardware supports 432 64 bit addresses for consistent 433 allocations such descriptors. */ 434 435 struct device_dma_parameters *dma_parms; 436 437 struct list_head dma_pools; /* dma pools (if dma'ble) */ 438 439 struct dma_coherent_mem *dma_mem; /* internal for coherent mem 440 override */ 441 /* arch specific additions */ 442 struct dev_archdata archdata; 443 444 struct device_node *of_node; /* associated device tree node */ 445 const struct of_device_id *of_match; /* matching of_device_id from driver */ 446 447 dev_t devt; /* dev_t, creates the sysfs "dev" */ 448 449 spinlock_t devres_lock; 450 struct list_head devres_head; 451 452 struct klist_node knode_class; 453 struct class *class; 454 const struct attribute_group **groups; /* optional groups */ 455 456 void (*release)(struct device *dev); 457 }; 458 459 /* Get the wakeup routines, which depend on struct device */ 460 #include <linux/pm_wakeup.h> 461 462 static inline const char *dev_name(const struct device *dev) 463 { 464 /* Use the init name until the kobject becomes available */ 465 if (dev->init_name) 466 return dev->init_name; 467 468 return kobject_name(&dev->kobj); 469 } 470 471 extern int dev_set_name(struct device *dev, const char *name, ...) 472 __attribute__((format(printf, 2, 3))); 473 474 #ifdef CONFIG_NUMA 475 static inline int dev_to_node(struct device *dev) 476 { 477 return dev->numa_node; 478 } 479 static inline void set_dev_node(struct device *dev, int node) 480 { 481 dev->numa_node = node; 482 } 483 #else 484 static inline int dev_to_node(struct device *dev) 485 { 486 return -1; 487 } 488 static inline void set_dev_node(struct device *dev, int node) 489 { 490 } 491 #endif 492 493 static inline unsigned int dev_get_uevent_suppress(const struct device *dev) 494 { 495 return dev->kobj.uevent_suppress; 496 } 497 498 static inline void dev_set_uevent_suppress(struct device *dev, int val) 499 { 500 dev->kobj.uevent_suppress = val; 501 } 502 503 static inline int device_is_registered(struct device *dev) 504 { 505 return dev->kobj.state_in_sysfs; 506 } 507 508 static inline void device_enable_async_suspend(struct device *dev) 509 { 510 if (!dev->power.in_suspend) 511 dev->power.async_suspend = true; 512 } 513 514 static inline void device_disable_async_suspend(struct device *dev) 515 { 516 if (!dev->power.in_suspend) 517 dev->power.async_suspend = false; 518 } 519 520 static inline bool device_async_suspend_enabled(struct device *dev) 521 { 522 return !!dev->power.async_suspend; 523 } 524 525 static inline void device_lock(struct device *dev) 526 { 527 mutex_lock(&dev->mutex); 528 } 529 530 static inline int device_trylock(struct device *dev) 531 { 532 return mutex_trylock(&dev->mutex); 533 } 534 535 static inline void device_unlock(struct device *dev) 536 { 537 mutex_unlock(&dev->mutex); 538 } 539 540 void driver_init(void); 541 542 /* 543 * High level routines for use by the bus drivers 544 */ 545 extern int __must_check device_register(struct device *dev); 546 extern void device_unregister(struct device *dev); 547 extern void device_initialize(struct device *dev); 548 extern int __must_check device_add(struct device *dev); 549 extern void device_del(struct device *dev); 550 extern int device_for_each_child(struct device *dev, void *data, 551 int (*fn)(struct device *dev, void *data)); 552 extern struct device *device_find_child(struct device *dev, void *data, 553 int (*match)(struct device *dev, void *data)); 554 extern int device_rename(struct device *dev, const char *new_name); 555 extern int device_move(struct device *dev, struct device *new_parent, 556 enum dpm_order dpm_order); 557 extern const char *device_get_devnode(struct device *dev, 558 mode_t *mode, const char **tmp); 559 extern void *dev_get_drvdata(const struct device *dev); 560 extern void dev_set_drvdata(struct device *dev, void *data); 561 562 /* 563 * Root device objects for grouping under /sys/devices 564 */ 565 extern struct device *__root_device_register(const char *name, 566 struct module *owner); 567 static inline struct device *root_device_register(const char *name) 568 { 569 return __root_device_register(name, THIS_MODULE); 570 } 571 extern void root_device_unregister(struct device *root); 572 573 static inline void *dev_get_platdata(const struct device *dev) 574 { 575 return dev->platform_data; 576 } 577 578 /* 579 * Manual binding of a device to driver. See drivers/base/bus.c 580 * for information on use. 581 */ 582 extern int __must_check device_bind_driver(struct device *dev); 583 extern void device_release_driver(struct device *dev); 584 extern int __must_check device_attach(struct device *dev); 585 extern int __must_check driver_attach(struct device_driver *drv); 586 extern int __must_check device_reprobe(struct device *dev); 587 588 /* 589 * Easy functions for dynamically creating devices on the fly 590 */ 591 extern struct device *device_create_vargs(struct class *cls, 592 struct device *parent, 593 dev_t devt, 594 void *drvdata, 595 const char *fmt, 596 va_list vargs); 597 extern struct device *device_create(struct class *cls, struct device *parent, 598 dev_t devt, void *drvdata, 599 const char *fmt, ...) 600 __attribute__((format(printf, 5, 6))); 601 extern void device_destroy(struct class *cls, dev_t devt); 602 603 /* 604 * Platform "fixup" functions - allow the platform to have their say 605 * about devices and actions that the general device layer doesn't 606 * know about. 607 */ 608 /* Notify platform of device discovery */ 609 extern int (*platform_notify)(struct device *dev); 610 611 extern int (*platform_notify_remove)(struct device *dev); 612 613 614 /** 615 * get_device - atomically increment the reference count for the device. 616 * 617 */ 618 extern struct device *get_device(struct device *dev); 619 extern void put_device(struct device *dev); 620 621 extern void wait_for_device_probe(void); 622 623 #ifdef CONFIG_DEVTMPFS 624 extern int devtmpfs_create_node(struct device *dev); 625 extern int devtmpfs_delete_node(struct device *dev); 626 extern int devtmpfs_mount(const char *mntdir); 627 #else 628 static inline int devtmpfs_create_node(struct device *dev) { return 0; } 629 static inline int devtmpfs_delete_node(struct device *dev) { return 0; } 630 static inline int devtmpfs_mount(const char *mountpoint) { return 0; } 631 #endif 632 633 /* drivers/base/power/shutdown.c */ 634 extern void device_shutdown(void); 635 636 #ifndef CONFIG_ARCH_NO_SYSDEV_OPS 637 /* drivers/base/sys.c */ 638 extern void sysdev_shutdown(void); 639 #else 640 static inline void sysdev_shutdown(void) { } 641 #endif 642 643 /* debugging and troubleshooting/diagnostic helpers. */ 644 extern const char *dev_driver_string(const struct device *dev); 645 646 647 #ifdef CONFIG_PRINTK 648 649 extern int dev_printk(const char *level, const struct device *dev, 650 const char *fmt, ...) 651 __attribute__ ((format (printf, 3, 4))); 652 extern int dev_emerg(const struct device *dev, const char *fmt, ...) 653 __attribute__ ((format (printf, 2, 3))); 654 extern int dev_alert(const struct device *dev, const char *fmt, ...) 655 __attribute__ ((format (printf, 2, 3))); 656 extern int dev_crit(const struct device *dev, const char *fmt, ...) 657 __attribute__ ((format (printf, 2, 3))); 658 extern int dev_err(const struct device *dev, const char *fmt, ...) 659 __attribute__ ((format (printf, 2, 3))); 660 extern int dev_warn(const struct device *dev, const char *fmt, ...) 661 __attribute__ ((format (printf, 2, 3))); 662 extern int dev_notice(const struct device *dev, const char *fmt, ...) 663 __attribute__ ((format (printf, 2, 3))); 664 extern int _dev_info(const struct device *dev, const char *fmt, ...) 665 __attribute__ ((format (printf, 2, 3))); 666 667 #else 668 669 static inline int dev_printk(const char *level, const struct device *dev, 670 const char *fmt, ...) 671 __attribute__ ((format (printf, 3, 4))); 672 static inline int dev_printk(const char *level, const struct device *dev, 673 const char *fmt, ...) 674 { return 0; } 675 676 static inline int dev_emerg(const struct device *dev, const char *fmt, ...) 677 __attribute__ ((format (printf, 2, 3))); 678 static inline int dev_emerg(const struct device *dev, const char *fmt, ...) 679 { return 0; } 680 static inline int dev_crit(const struct device *dev, const char *fmt, ...) 681 __attribute__ ((format (printf, 2, 3))); 682 static inline int dev_crit(const struct device *dev, const char *fmt, ...) 683 { return 0; } 684 static inline int dev_alert(const struct device *dev, const char *fmt, ...) 685 __attribute__ ((format (printf, 2, 3))); 686 static inline int dev_alert(const struct device *dev, const char *fmt, ...) 687 { return 0; } 688 static inline int dev_err(const struct device *dev, const char *fmt, ...) 689 __attribute__ ((format (printf, 2, 3))); 690 static inline int dev_err(const struct device *dev, const char *fmt, ...) 691 { return 0; } 692 static inline int dev_warn(const struct device *dev, const char *fmt, ...) 693 __attribute__ ((format (printf, 2, 3))); 694 static inline int dev_warn(const struct device *dev, const char *fmt, ...) 695 { return 0; } 696 static inline int dev_notice(const struct device *dev, const char *fmt, ...) 697 __attribute__ ((format (printf, 2, 3))); 698 static inline int dev_notice(const struct device *dev, const char *fmt, ...) 699 { return 0; } 700 static inline int _dev_info(const struct device *dev, const char *fmt, ...) 701 __attribute__ ((format (printf, 2, 3))); 702 static inline int _dev_info(const struct device *dev, const char *fmt, ...) 703 { return 0; } 704 705 #endif 706 707 /* 708 * Stupid hackaround for existing uses of non-printk uses dev_info 709 * 710 * Note that the definition of dev_info below is actually _dev_info 711 * and a macro is used to avoid redefining dev_info 712 */ 713 714 #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg) 715 716 #if defined(DEBUG) 717 #define dev_dbg(dev, format, arg...) \ 718 dev_printk(KERN_DEBUG, dev, format, ##arg) 719 #elif defined(CONFIG_DYNAMIC_DEBUG) 720 #define dev_dbg(dev, format, ...) \ 721 do { \ 722 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ 723 } while (0) 724 #else 725 #define dev_dbg(dev, format, arg...) \ 726 ({ \ 727 if (0) \ 728 dev_printk(KERN_DEBUG, dev, format, ##arg); \ 729 0; \ 730 }) 731 #endif 732 733 #ifdef VERBOSE_DEBUG 734 #define dev_vdbg dev_dbg 735 #else 736 #define dev_vdbg(dev, format, arg...) \ 737 ({ \ 738 if (0) \ 739 dev_printk(KERN_DEBUG, dev, format, ##arg); \ 740 0; \ 741 }) 742 #endif 743 744 /* 745 * dev_WARN() acts like dev_printk(), but with the key difference 746 * of using a WARN/WARN_ON to get the message out, including the 747 * file/line information and a backtrace. 748 */ 749 #define dev_WARN(dev, format, arg...) \ 750 WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); 751 752 /* Create alias, so I can be autoloaded. */ 753 #define MODULE_ALIAS_CHARDEV(major,minor) \ 754 MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) 755 #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ 756 MODULE_ALIAS("char-major-" __stringify(major) "-*") 757 758 #ifdef CONFIG_SYSFS_DEPRECATED 759 extern long sysfs_deprecated; 760 #else 761 #define sysfs_deprecated 0 762 #endif 763 764 #endif /* _DEVICE_H_ */ 765