1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * Copyright (c) 2021-2025 The FreeBSD Foundation 8 * 9 * Portions of this software were developed by Björn Zeeb 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice unmodified, this list of conditions, and the following 17 * disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 #ifndef _LINUXKPI_LINUX_DEVICE_H_ 34 #define _LINUXKPI_LINUX_DEVICE_H_ 35 36 #include <linux/err.h> 37 #include <linux/types.h> 38 #include <linux/kobject.h> 39 #include <linux/sysfs.h> 40 #include <linux/list.h> 41 #include <linux/compiler.h> 42 #include <linux/module.h> 43 #include <linux/workqueue.h> 44 #include <linux/kdev_t.h> 45 #include <linux/backlight.h> 46 #include <linux/pm.h> 47 #include <linux/idr.h> 48 #include <linux/overflow.h> 49 #include <linux/ratelimit.h> /* via linux/dev_printk.h */ 50 #include <linux/fwnode.h> 51 #include <asm/atomic.h> 52 53 #include <sys/bus.h> 54 #include <sys/backlight.h> 55 56 struct device; 57 58 struct class { 59 const char *name; 60 struct kobject kobj; 61 devclass_t bsdclass; 62 const struct dev_pm_ops *pm; 63 const struct attribute_group **dev_groups; 64 void (*class_release)(struct class *class); 65 void (*dev_release)(struct device *dev); 66 char * (*devnode)(struct device *dev, umode_t *mode); 67 }; 68 69 struct dev_pm_ops { 70 int (*prepare)(struct device *dev); 71 void (*complete)(struct device *dev); 72 int (*suspend)(struct device *dev); 73 int (*suspend_late)(struct device *dev); 74 int (*resume)(struct device *dev); 75 int (*resume_early)(struct device *dev); 76 int (*freeze)(struct device *dev); 77 int (*freeze_late)(struct device *dev); 78 int (*thaw)(struct device *dev); 79 int (*thaw_early)(struct device *dev); 80 int (*poweroff)(struct device *dev); 81 int (*poweroff_late)(struct device *dev); 82 int (*restore)(struct device *dev); 83 int (*restore_early)(struct device *dev); 84 int (*suspend_noirq)(struct device *dev); 85 int (*runtime_suspend)(struct device *dev); 86 int (*runtime_resume)(struct device *dev); 87 int (*runtime_idle)(struct device *dev); 88 }; 89 90 struct device_driver { 91 const char *name; 92 const struct dev_pm_ops *pm; 93 94 void (*shutdown) (struct device *); 95 void (*coredump) (struct device *); 96 }; 97 98 struct device_type { 99 const char *name; 100 }; 101 102 struct device { 103 struct device *parent; 104 struct list_head irqents; 105 device_t bsddev; 106 /* 107 * The following flag is used to determine if the LinuxKPI is 108 * responsible for detaching the BSD device or not. If the 109 * LinuxKPI got the BSD device using devclass_get_device(), it 110 * must not try to detach or delete it, because it's already 111 * done somewhere else. 112 */ 113 bool bsddev_attached_here; 114 struct device_driver *driver; 115 struct device_type *type; 116 dev_t devt; 117 struct class *class; 118 void (*release)(struct device *dev); 119 struct kobject kobj; 120 void *dma_priv; 121 void *driver_data; 122 unsigned int irq; 123 #define LINUX_IRQ_INVALID 65535 124 unsigned int irq_start; 125 unsigned int irq_end; 126 const struct attribute_group **groups; 127 struct fwnode_handle *fwnode; 128 struct cdev *backlight_dev; 129 struct backlight_device *bd; 130 131 spinlock_t devres_lock; 132 struct list_head devres_head; 133 134 struct dev_pm_info power; 135 }; 136 137 extern struct device linux_root_device; 138 extern struct kobject linux_class_root; 139 extern const struct kobj_type linux_dev_ktype; 140 extern const struct kobj_type linux_class_ktype; 141 142 struct class_attribute { 143 struct attribute attr; 144 ssize_t (*show)(struct class *, struct class_attribute *, char *); 145 ssize_t (*store)(struct class *, struct class_attribute *, const char *, size_t); 146 const void *(*namespace)(struct class *, const struct class_attribute *); 147 }; 148 149 #define CLASS_ATTR(_name, _mode, _show, _store) \ 150 struct class_attribute class_attr_##_name = \ 151 { { #_name, NULL, _mode }, _show, _store } 152 153 struct device_attribute { 154 struct attribute attr; 155 ssize_t (*show)(struct device *, 156 struct device_attribute *, char *); 157 ssize_t (*store)(struct device *, 158 struct device_attribute *, const char *, 159 size_t); 160 }; 161 162 #define DEVICE_ATTR(_name, _mode, _show, _store) \ 163 struct device_attribute dev_attr_##_name = \ 164 __ATTR(_name, _mode, _show, _store) 165 #define DEVICE_ATTR_RO(_name) \ 166 struct device_attribute dev_attr_##_name = __ATTR_RO(_name) 167 #define DEVICE_ATTR_WO(_name) \ 168 struct device_attribute dev_attr_##_name = __ATTR_WO(_name) 169 #define DEVICE_ATTR_RW(_name) \ 170 struct device_attribute dev_attr_##_name = __ATTR_RW(_name) 171 172 /* Simple class attribute that is just a static string */ 173 struct class_attribute_string { 174 struct class_attribute attr; 175 char *str; 176 }; 177 178 static inline ssize_t 179 show_class_attr_string(struct class *class, 180 struct class_attribute *attr, char *buf) 181 { 182 struct class_attribute_string *cs; 183 cs = container_of(attr, struct class_attribute_string, attr); 184 return snprintf(buf, PAGE_SIZE, "%s\n", cs->str); 185 } 186 187 /* Currently read-only only */ 188 #define _CLASS_ATTR_STRING(_name, _mode, _str) \ 189 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } 190 #define CLASS_ATTR_STRING(_name, _mode, _str) \ 191 struct class_attribute_string class_attr_##_name = \ 192 _CLASS_ATTR_STRING(_name, _mode, _str) 193 194 #define dev_printk(lvl, dev, fmt, ...) \ 195 device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 196 197 #define dev_emerg(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 198 #define dev_alert(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 199 #define dev_crit(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 200 #define dev_err(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 201 #define dev_warn(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 202 #define dev_notice(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 203 #define dev_info(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 204 #define dev_dbg(dev, fmt, ...) do { } while (0) 205 206 #define dev_WARN(dev, fmt, ...) \ 207 device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__) 208 209 #define dev_WARN_ONCE(dev, condition, fmt, ...) do { \ 210 static bool __dev_WARN_ONCE; \ 211 bool __ret_warn_on = (condition); \ 212 if (unlikely(__ret_warn_on)) { \ 213 if (!__dev_WARN_ONCE) { \ 214 __dev_WARN_ONCE = true; \ 215 device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 216 } \ 217 } \ 218 } while (0) 219 220 #define dev_info_once(dev, ...) do { \ 221 static bool __dev_info_once; \ 222 if (!__dev_info_once) { \ 223 __dev_info_once = true; \ 224 dev_info(dev, __VA_ARGS__); \ 225 } \ 226 } while (0) 227 228 #define dev_warn_once(dev, ...) do { \ 229 static bool __dev_warn_once; \ 230 if (!__dev_warn_once) { \ 231 __dev_warn_once = 1; \ 232 dev_warn(dev, __VA_ARGS__); \ 233 } \ 234 } while (0) 235 236 #define dev_err_once(dev, ...) do { \ 237 static bool __dev_err_once; \ 238 if (!__dev_err_once) { \ 239 __dev_err_once = 1; \ 240 dev_err(dev, __VA_ARGS__); \ 241 } \ 242 } while (0) 243 244 #define dev_dbg_once(dev, ...) do { \ 245 static bool __dev_dbg_once; \ 246 if (!__dev_dbg_once) { \ 247 __dev_dbg_once = 1; \ 248 dev_dbg(dev, __VA_ARGS__); \ 249 } \ 250 } while (0) 251 252 #define dev_err_ratelimited(dev, ...) do { \ 253 static linux_ratelimit_t __ratelimited; \ 254 if (linux_ratelimited(&__ratelimited)) \ 255 dev_err(dev, __VA_ARGS__); \ 256 } while (0) 257 258 #define dev_warn_ratelimited(dev, ...) do { \ 259 static linux_ratelimit_t __ratelimited; \ 260 if (linux_ratelimited(&__ratelimited)) \ 261 dev_warn(dev, __VA_ARGS__); \ 262 } while (0) 263 264 #define dev_dbg_ratelimited(dev, ...) do { \ 265 static linux_ratelimit_t __ratelimited; \ 266 if (linux_ratelimited(&__ratelimited)) \ 267 dev_dbg(dev, __VA_ARGS__); \ 268 } while (0) 269 270 static inline int 271 dev_err_probe(const struct device *dev, int err, const char *fmt, ...) 272 { 273 va_list args; 274 275 va_start(args, fmt); 276 277 /* 278 * On Linux, they look at the error code to determine if the message 279 * should be logged (not logged if -ENOMEM) and at which log level. 280 */ 281 device_printf(dev->bsddev, fmt, args); 282 283 va_end(args); 284 285 return (err); 286 } 287 288 #define dev_err_ptr_probe(dev, err, fmt, ...) \ 289 ERR_PTR(dev_err_probe((dev), (err), fmt, ##__VA_ARGS__) 290 291 #define dev_err_cast_probe(dev, err, fmt, ...) \ 292 ERR_PTR(dev_err_probe((dev), PTR_ERR(err), fmt, ##__VA_ARGS__) 293 294 /* Public and LinuxKPI internal devres functions. */ 295 void *lkpi_devres_alloc(void(*release)(struct device *, void *), size_t, gfp_t); 296 void lkpi_devres_add(struct device *, void *); 297 void lkpi_devres_free(void *); 298 void *lkpi_devres_find(struct device *, void(*release)(struct device *, void *), 299 int (*match)(struct device *, void *, void *), void *); 300 int lkpi_devres_destroy(struct device *, void(*release)(struct device *, void *), 301 int (*match)(struct device *, void *, void *), void *); 302 #define devres_alloc(_r, _s, _g) lkpi_devres_alloc(_r, _s, _g) 303 #define devres_add(_d, _p) lkpi_devres_add(_d, _p) 304 #define devres_free(_p) lkpi_devres_free(_p) 305 #define devres_find(_d, _rfn, _mfn, _mp) \ 306 lkpi_devres_find(_d, _rfn, _mfn, _mp) 307 #define devres_destroy(_d, _rfn, _mfn, _mp) \ 308 lkpi_devres_destroy(_d, _rfn, _mfn, _mp) 309 void lkpi_devres_release_free_list(struct device *); 310 void lkpi_devres_unlink(struct device *, void *); 311 void lkpi_devm_kmalloc_release(struct device *, void *); 312 void lkpi_devm_kfree(struct device *, const void *); 313 #define devm_kfree(_d, _p) lkpi_devm_kfree(_d, _p) 314 315 static inline const char * 316 dev_driver_string(const struct device *dev) 317 { 318 driver_t *drv; 319 const char *str = ""; 320 321 if (dev->bsddev != NULL) { 322 drv = device_get_driver(dev->bsddev); 323 if (drv != NULL) 324 str = drv->name; 325 } 326 327 return (str); 328 } 329 330 static inline void * 331 dev_get_drvdata(const struct device *dev) 332 { 333 334 return dev->driver_data; 335 } 336 337 static inline void 338 dev_set_drvdata(struct device *dev, void *data) 339 { 340 341 dev->driver_data = data; 342 } 343 344 static inline struct device * 345 get_device(struct device *dev) 346 { 347 348 if (dev) 349 kobject_get(&dev->kobj); 350 351 return (dev); 352 } 353 354 static inline char * 355 dev_name(const struct device *dev) 356 { 357 358 return kobject_name(&dev->kobj); 359 } 360 361 static inline bool 362 dev_is_removable(struct device *dev) 363 { 364 365 return (false); 366 } 367 368 #define dev_set_name(_dev, _fmt, ...) \ 369 kobject_set_name(&(_dev)->kobj, (_fmt), ##__VA_ARGS__) 370 371 static inline void 372 put_device(struct device *dev) 373 { 374 375 if (dev) 376 kobject_put(&dev->kobj); 377 } 378 379 struct class *lkpi_class_create(const char *name); 380 #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60400 381 #define class_create(name) lkpi_class_create(name) 382 #else 383 #define class_create(owner, name) lkpi_class_create(name) 384 #endif 385 386 static inline int 387 class_register(struct class *class) 388 { 389 390 class->bsdclass = devclass_create(class->name); 391 kobject_init(&class->kobj, &linux_class_ktype); 392 kobject_set_name(&class->kobj, class->name); 393 kobject_add(&class->kobj, &linux_class_root, class->name); 394 395 return (0); 396 } 397 398 static inline void 399 class_unregister(struct class *class) 400 { 401 402 kobject_put(&class->kobj); 403 } 404 405 static inline struct device *kobj_to_dev(struct kobject *kobj) 406 { 407 return container_of(kobj, struct device, kobj); 408 } 409 410 struct device *device_create(struct class *class, struct device *parent, 411 dev_t devt, void *drvdata, const char *fmt, ...); 412 struct device *device_create_groups_vargs(struct class *class, struct device *parent, 413 dev_t devt, void *drvdata, const struct attribute_group **groups, 414 const char *fmt, va_list args); 415 416 /* 417 * Devices are registered and created for exporting to sysfs. Create 418 * implies register and register assumes the device fields have been 419 * setup appropriately before being called. 420 */ 421 static inline void 422 device_initialize(struct device *dev) 423 { 424 device_t bsddev = NULL; 425 int unit = -1; 426 427 if (dev->devt) { 428 unit = MINOR(dev->devt); 429 bsddev = devclass_get_device(dev->class->bsdclass, unit); 430 dev->bsddev_attached_here = false; 431 } else if (dev->parent == NULL) { 432 bsddev = devclass_get_device(dev->class->bsdclass, 0); 433 dev->bsddev_attached_here = false; 434 } else { 435 dev->bsddev_attached_here = true; 436 } 437 438 if (bsddev == NULL && dev->parent != NULL) { 439 bsddev = device_add_child(dev->parent->bsddev, 440 dev->class->kobj.name, unit); 441 } 442 443 if (bsddev != NULL) 444 device_set_softc(bsddev, dev); 445 446 dev->bsddev = bsddev; 447 MPASS(dev->bsddev != NULL); 448 kobject_init(&dev->kobj, &linux_dev_ktype); 449 450 spin_lock_init(&dev->devres_lock); 451 INIT_LIST_HEAD(&dev->devres_head); 452 } 453 454 static inline int 455 device_add(struct device *dev) 456 { 457 if (dev->bsddev != NULL) { 458 if (dev->devt == 0) 459 dev->devt = makedev(0, device_get_unit(dev->bsddev)); 460 } 461 kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev)); 462 463 if (dev->groups) 464 return (sysfs_create_groups(&dev->kobj, dev->groups)); 465 466 return (0); 467 } 468 469 static inline void 470 device_create_release(struct device *dev) 471 { 472 kfree(dev); 473 } 474 475 static inline struct device * 476 device_create_with_groups(struct class *class, 477 struct device *parent, dev_t devt, void *drvdata, 478 const struct attribute_group **groups, const char *fmt, ...) 479 { 480 va_list vargs; 481 struct device *dev; 482 483 va_start(vargs, fmt); 484 dev = device_create_groups_vargs(class, parent, devt, drvdata, 485 groups, fmt, vargs); 486 va_end(vargs); 487 return dev; 488 } 489 490 static inline bool 491 device_is_registered(struct device *dev) 492 { 493 494 return (dev->bsddev != NULL); 495 } 496 497 static inline int 498 device_register(struct device *dev) 499 { 500 device_t bsddev = NULL; 501 int unit = -1; 502 503 if (device_is_registered(dev)) 504 goto done; 505 506 if (dev->devt) { 507 unit = MINOR(dev->devt); 508 bsddev = devclass_get_device(dev->class->bsdclass, unit); 509 dev->bsddev_attached_here = false; 510 } else if (dev->parent == NULL) { 511 bsddev = devclass_get_device(dev->class->bsdclass, 0); 512 dev->bsddev_attached_here = false; 513 } else { 514 dev->bsddev_attached_here = true; 515 } 516 if (bsddev == NULL && dev->parent != NULL) { 517 bsddev = device_add_child(dev->parent->bsddev, 518 dev->class->kobj.name, unit); 519 } 520 if (bsddev != NULL) { 521 if (dev->devt == 0) 522 dev->devt = makedev(0, device_get_unit(bsddev)); 523 device_set_softc(bsddev, dev); 524 } 525 dev->bsddev = bsddev; 526 done: 527 kobject_init(&dev->kobj, &linux_dev_ktype); 528 kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev)); 529 530 sysfs_create_groups(&dev->kobj, dev->class->dev_groups); 531 532 return (0); 533 } 534 535 static inline void 536 device_unregister(struct device *dev) 537 { 538 device_t bsddev; 539 540 sysfs_remove_groups(&dev->kobj, dev->class->dev_groups); 541 542 bsddev = dev->bsddev; 543 dev->bsddev = NULL; 544 545 if (bsddev != NULL && dev->bsddev_attached_here) { 546 bus_topo_lock(); 547 device_delete_child(device_get_parent(bsddev), bsddev); 548 bus_topo_unlock(); 549 } 550 put_device(dev); 551 } 552 553 static inline void 554 device_del(struct device *dev) 555 { 556 device_t bsddev; 557 558 bsddev = dev->bsddev; 559 dev->bsddev = NULL; 560 561 if (bsddev != NULL && dev->bsddev_attached_here) { 562 bus_topo_lock(); 563 device_delete_child(device_get_parent(bsddev), bsddev); 564 bus_topo_unlock(); 565 } 566 } 567 568 static inline void 569 device_destroy(struct class *class, dev_t devt) 570 { 571 device_t bsddev; 572 int unit; 573 574 unit = MINOR(devt); 575 bsddev = devclass_get_device(class->bsdclass, unit); 576 if (bsddev != NULL) 577 device_unregister(device_get_softc(bsddev)); 578 } 579 580 static inline void 581 device_release_driver(struct device *dev) 582 { 583 584 pr_debug("%s: TODO\n", __func__); 585 #if 0 586 /* This leads to panics. Disable temporarily. Keep to rework. */ 587 588 /* We also need to cleanup LinuxKPI bits. What else? */ 589 lkpi_devres_release_free_list(dev); 590 dev_set_drvdata(dev, NULL); 591 /* Do not call dev->release! */ 592 593 bus_topo_lock(); 594 if (device_is_attached(dev->bsddev)) 595 device_detach(dev->bsddev); 596 bus_topo_unlock(); 597 #endif 598 } 599 600 static inline int 601 device_reprobe(struct device *dev) 602 { 603 int error; 604 605 device_release_driver(dev); 606 bus_topo_lock(); 607 error = device_probe_and_attach(dev->bsddev); 608 bus_topo_unlock(); 609 610 return (-error); 611 } 612 613 static inline void 614 device_set_wakeup_enable(struct device *dev __unused, bool enable __unused) 615 { 616 617 /* 618 * XXX-BZ TODO This is used by wireless drivers supporting WoWLAN which 619 * we currently do not support. 620 */ 621 } 622 623 static inline int 624 device_wakeup_enable(struct device *dev) 625 { 626 627 device_set_wakeup_enable(dev, true); 628 return (0); 629 } 630 631 static inline bool 632 device_iommu_mapped(struct device *dev __unused) 633 { 634 return (false); 635 } 636 637 #define dev_pm_set_driver_flags(dev, flags) do { \ 638 } while (0) 639 640 static inline void 641 linux_class_kfree(struct class *class) 642 { 643 644 kfree(class); 645 } 646 647 static inline void 648 class_destroy(struct class *class) 649 { 650 651 if (class == NULL) 652 return; 653 class_unregister(class); 654 } 655 656 static inline int 657 device_create_file(struct device *dev, const struct device_attribute *attr) 658 { 659 660 if (dev) 661 return sysfs_create_file(&dev->kobj, &attr->attr); 662 return -EINVAL; 663 } 664 665 static inline void 666 device_remove_file(struct device *dev, const struct device_attribute *attr) 667 { 668 669 if (dev) 670 sysfs_remove_file(&dev->kobj, &attr->attr); 671 } 672 673 static inline int 674 class_create_file(struct class *class, const struct class_attribute *attr) 675 { 676 677 if (class) 678 return sysfs_create_file(&class->kobj, &attr->attr); 679 return -EINVAL; 680 } 681 682 static inline void 683 class_remove_file(struct class *class, const struct class_attribute *attr) 684 { 685 686 if (class) 687 sysfs_remove_file(&class->kobj, &attr->attr); 688 } 689 690 #define dev_to_node(dev) linux_dev_to_node(dev) 691 #define of_node_to_nid(node) -1 692 int linux_dev_to_node(struct device *); 693 694 char *kvasprintf(gfp_t, const char *, va_list); 695 char *kasprintf(gfp_t, const char *, ...); 696 char *lkpi_devm_kasprintf(struct device *, gfp_t, const char *, ...); 697 698 #define devm_kasprintf(_dev, _gfp, _fmt, ...) \ 699 lkpi_devm_kasprintf(_dev, _gfp, _fmt, ##__VA_ARGS__) 700 701 static __inline void * 702 devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) 703 { 704 void *p; 705 706 p = lkpi_devres_alloc(lkpi_devm_kmalloc_release, size, gfp); 707 if (p != NULL) 708 lkpi_devres_add(dev, p); 709 710 return (p); 711 } 712 713 static inline void * 714 devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp) 715 { 716 void *dst; 717 718 if (len == 0) 719 return (NULL); 720 721 dst = devm_kmalloc(dev, len, gfp); 722 if (dst != NULL) 723 memcpy(dst, src, len); 724 725 return (dst); 726 } 727 728 static inline void * 729 devm_kmemdup_array(struct device *dev, const void *src, size_t n, size_t len, 730 gfp_t gfp) 731 { 732 return (devm_kmemdup(dev, src, size_mul(n, len), gfp)); 733 } 734 735 #define devm_kzalloc(_dev, _size, _gfp) \ 736 devm_kmalloc((_dev), (_size), (_gfp) | __GFP_ZERO) 737 738 #define devm_kcalloc(_dev, _sizen, _size, _gfp) \ 739 devm_kmalloc((_dev), ((_sizen) * (_size)), (_gfp) | __GFP_ZERO) 740 741 int lkpi_devm_add_action(struct device *dev, void (*action)(void *), void *data); 742 #define devm_add_action(dev, action, data) \ 743 lkpi_devm_add_action(dev, action, data); 744 int lkpi_devm_add_action_or_reset(struct device *dev, void (*action)(void *), void *data); 745 #define devm_add_action_or_reset(dev, action, data) \ 746 lkpi_devm_add_action_or_reset(dev, action, data) 747 748 int lkpi_devm_device_add_group(struct device *dev, const struct attribute_group *group); 749 #define devm_device_add_group(dev, group) \ 750 lkpi_devm_device_add_group(dev, group) 751 752 #endif /* _LINUXKPI_LINUX_DEVICE_H_ */ 753