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_BOUND_DRIVER 0x00000003 /* driver bound to device */ 113 #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be 114 unbound */ 115 #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound 116 from the device */ 117 118 extern struct kset *bus_get_kset(struct bus_type *bus); 119 extern struct klist *bus_get_device_klist(struct bus_type *bus); 120 121 struct device_driver { 122 const char *name; 123 struct bus_type *bus; 124 125 struct module *owner; 126 const char *mod_name; /* used for built-in modules */ 127 128 bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ 129 130 #if defined(CONFIG_OF) 131 const struct of_device_id *of_match_table; 132 #endif 133 134 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); 139 const struct attribute_group **groups; 140 141 const struct dev_pm_ops *pm; 142 143 struct driver_private *p; 144 }; 145 146 147 extern int __must_check driver_register(struct device_driver *drv); 148 extern void driver_unregister(struct device_driver *drv); 149 150 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); 154 extern int driver_probe_done(void); 155 extern void wait_for_device_probe(void); 156 157 158 /* sysfs interface for exporting driver attributes */ 159 160 struct driver_attribute { 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); 165 }; 166 167 #define DRIVER_ATTR(_name, _mode, _show, _store) \ 168 struct driver_attribute driver_attr_##_name = \ 169 __ATTR(_name, _mode, _show, _store) 170 171 extern int __must_check driver_create_file(struct device_driver *driver, 172 const struct driver_attribute *attr); 173 extern void driver_remove_file(struct device_driver *driver, 174 const struct driver_attribute *attr); 175 176 extern int __must_check driver_add_kobj(struct device_driver *drv, 177 struct kobject *kobj, 178 const char *fmt, ...); 179 180 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)); 188 189 /* 190 * device classes 191 */ 192 struct class { 193 const char *name; 194 struct module *owner; 195 196 struct class_attribute *class_attrs; 197 struct device_attribute *dev_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 class_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; 423 424 #ifdef CONFIG_NUMA 425 int numa_node; /* NUMA node this device is close to */ 426 #endif 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. */ 433 434 struct device_dma_parameters *dma_parms; 435 436 struct list_head dma_pools; /* dma pools (if dma'ble) */ 437 438 struct dma_coherent_mem *dma_mem; /* internal for coherent mem 439 override */ 440 /* arch specific additions */ 441 struct dev_archdata archdata; 442 #ifdef CONFIG_OF 443 struct device_node *of_node; 444 #endif 445 446 dev_t devt; /* dev_t, creates the sysfs "dev" */ 447 448 spinlock_t devres_lock; 449 struct list_head devres_head; 450 451 struct klist_node knode_class; 452 struct class *class; 453 const struct attribute_group **groups; /* optional groups */ 454 455 void (*release)(struct device *dev); 456 }; 457 458 /* Get the wakeup routines, which depend on struct device */ 459 #include <linux/pm_wakeup.h> 460 461 static inline const char *dev_name(const struct device *dev) 462 { 463 /* Use the init name until the kobject becomes available */ 464 if (dev->init_name) 465 return dev->init_name; 466 467 return kobject_name(&dev->kobj); 468 } 469 470 extern int dev_set_name(struct device *dev, const char *name, ...) 471 __attribute__((format(printf, 2, 3))); 472 473 #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 491 492 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 } 501 502 static inline int device_is_registered(struct device *dev) 503 { 504 return dev->kobj.state_in_sysfs; 505 } 506 507 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 } 512 513 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 } 523 524 static inline void device_lock(struct device *dev) 525 { 526 mutex_lock(&dev->mutex); 527 } 528 529 static inline int device_trylock(struct device *dev) 530 { 531 return mutex_trylock(&dev->mutex); 532 } 533 534 static inline void device_unlock(struct device *dev) 535 { 536 mutex_unlock(&dev->mutex); 537 } 538 539 void driver_init(void); 540 541 /* 542 * High level routines for use by the bus drivers 543 */ 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)); 553 extern int device_rename(struct device *dev, char *new_name); 554 extern int device_move(struct device *dev, struct device *new_parent, 555 enum dpm_order dpm_order); 556 extern const char *device_get_devnode(struct device *dev, 557 mode_t *mode, const char **tmp); 558 extern void *dev_get_drvdata(const struct device *dev); 559 extern void dev_set_drvdata(struct device *dev, void *data); 560 561 /* 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); 571 572 static inline void *dev_get_platdata(const struct device *dev) 573 { 574 return dev->platform_data; 575 } 576 577 /* 578 * Manual binding of a device to driver. See drivers/base/bus.c 579 * for information on use. 580 */ 581 extern int __must_check device_bind_driver(struct device *dev); 582 extern void device_release_driver(struct device *dev); 583 extern int __must_check device_attach(struct device *dev); 584 extern int __must_check driver_attach(struct device_driver *drv); 585 extern int __must_check device_reprobe(struct device *dev); 586 587 /* 588 * Easy functions for dynamically creating devices on the fly 589 */ 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); 596 extern struct device *device_create(struct class *cls, struct device *parent, 597 dev_t devt, void *drvdata, 598 const char *fmt, ...) 599 __attribute__((format(printf, 5, 6))); 600 extern void device_destroy(struct class *cls, dev_t devt); 601 602 /* 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 */ 608 extern int (*platform_notify)(struct device *dev); 609 610 extern int (*platform_notify_remove)(struct device *dev); 611 612 613 /** 614 * get_device - atomically increment the reference count for the device. 615 * 616 */ 617 extern struct device *get_device(struct device *dev); 618 extern void put_device(struct device *dev); 619 620 extern void wait_for_device_probe(void); 621 622 #ifdef CONFIG_DEVTMPFS 623 extern int devtmpfs_create_node(struct device *dev); 624 extern int devtmpfs_delete_node(struct device *dev); 625 extern int devtmpfs_mount(const char *mntdir); 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 631 632 /* drivers/base/power/shutdown.c */ 633 extern void device_shutdown(void); 634 635 /* drivers/base/sys.c */ 636 extern void sysdev_shutdown(void); 637 638 /* debugging and troubleshooting/diagnostic helpers. */ 639 extern const char *dev_driver_string(const struct device *dev); 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) 710 711 #if defined(DEBUG) 712 #define dev_dbg(dev, format, arg...) \ 713 dev_printk(KERN_DEBUG, dev, format, ##arg) 714 #elif defined(CONFIG_DYNAMIC_DEBUG) 715 #define dev_dbg(dev, format, ...) \ 716 do { \ 717 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ 718 } while (0) 719 #else 720 #define dev_dbg(dev, format, arg...) \ 721 ({ \ 722 if (0) \ 723 dev_printk(KERN_DEBUG, dev, format, ##arg); \ 724 0; \ 725 }) 726 #endif 727 728 #ifdef VERBOSE_DEBUG 729 #define dev_vdbg dev_dbg 730 #else 731 #define dev_vdbg(dev, format, arg...) \ 732 ({ \ 733 if (0) \ 734 dev_printk(KERN_DEBUG, dev, format, ##arg); \ 735 0; \ 736 }) 737 #endif 738 739 /* 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); 746 747 /* 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_ */ 753