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) 2021-2022 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 module *owner;
61 struct kobject kobj;
62 devclass_t bsdclass;
63 const struct dev_pm_ops *pm;
64 const struct attribute_group **dev_groups;
65 void (*class_release)(struct class *class);
66 void (*dev_release)(struct device *dev);
67 char * (*devnode)(struct device *dev, umode_t *mode);
68 };
69
70 struct dev_pm_ops {
71 int (*prepare)(struct device *dev);
72 void (*complete)(struct device *dev);
73 int (*suspend)(struct device *dev);
74 int (*suspend_late)(struct device *dev);
75 int (*resume)(struct device *dev);
76 int (*resume_early)(struct device *dev);
77 int (*freeze)(struct device *dev);
78 int (*freeze_late)(struct device *dev);
79 int (*thaw)(struct device *dev);
80 int (*thaw_early)(struct device *dev);
81 int (*poweroff)(struct device *dev);
82 int (*poweroff_late)(struct device *dev);
83 int (*restore)(struct device *dev);
84 int (*restore_early)(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
95 struct device_type {
96 const char *name;
97 };
98
99 struct device {
100 struct device *parent;
101 struct list_head irqents;
102 device_t bsddev;
103 /*
104 * The following flag is used to determine if the LinuxKPI is
105 * responsible for detaching the BSD device or not. If the
106 * LinuxKPI got the BSD device using devclass_get_device(), it
107 * must not try to detach or delete it, because it's already
108 * done somewhere else.
109 */
110 bool bsddev_attached_here;
111 struct device_driver *driver;
112 struct device_type *type;
113 dev_t devt;
114 struct class *class;
115 void (*release)(struct device *dev);
116 struct kobject kobj;
117 void *dma_priv;
118 void *driver_data;
119 unsigned int irq;
120 #define LINUX_IRQ_INVALID 65535
121 unsigned int irq_start;
122 unsigned int irq_end;
123 const struct attribute_group **groups;
124 struct fwnode_handle *fwnode;
125 struct cdev *backlight_dev;
126 struct backlight_device *bd;
127
128 spinlock_t devres_lock;
129 struct list_head devres_head;
130
131 struct dev_pm_info power;
132 };
133
134 extern struct device linux_root_device;
135 extern struct kobject linux_class_root;
136 extern const struct kobj_type linux_dev_ktype;
137 extern const struct kobj_type linux_class_ktype;
138
139 struct class_attribute {
140 struct attribute attr;
141 ssize_t (*show)(struct class *, struct class_attribute *, char *);
142 ssize_t (*store)(struct class *, struct class_attribute *, const char *, size_t);
143 const void *(*namespace)(struct class *, const struct class_attribute *);
144 };
145
146 #define CLASS_ATTR(_name, _mode, _show, _store) \
147 struct class_attribute class_attr_##_name = \
148 { { #_name, NULL, _mode }, _show, _store }
149
150 struct device_attribute {
151 struct attribute attr;
152 ssize_t (*show)(struct device *,
153 struct device_attribute *, char *);
154 ssize_t (*store)(struct device *,
155 struct device_attribute *, const char *,
156 size_t);
157 };
158
159 #define DEVICE_ATTR(_name, _mode, _show, _store) \
160 struct device_attribute dev_attr_##_name = \
161 __ATTR(_name, _mode, _show, _store)
162 #define DEVICE_ATTR_RO(_name) \
163 struct device_attribute dev_attr_##_name = __ATTR_RO(_name)
164 #define DEVICE_ATTR_WO(_name) \
165 struct device_attribute dev_attr_##_name = __ATTR_WO(_name)
166 #define DEVICE_ATTR_RW(_name) \
167 struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
168
169 /* Simple class attribute that is just a static string */
170 struct class_attribute_string {
171 struct class_attribute attr;
172 char *str;
173 };
174
175 static inline ssize_t
show_class_attr_string(struct class * class,struct class_attribute * attr,char * buf)176 show_class_attr_string(struct class *class,
177 struct class_attribute *attr, char *buf)
178 {
179 struct class_attribute_string *cs;
180 cs = container_of(attr, struct class_attribute_string, attr);
181 return snprintf(buf, PAGE_SIZE, "%s\n", cs->str);
182 }
183
184 /* Currently read-only only */
185 #define _CLASS_ATTR_STRING(_name, _mode, _str) \
186 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
187 #define CLASS_ATTR_STRING(_name, _mode, _str) \
188 struct class_attribute_string class_attr_##_name = \
189 _CLASS_ATTR_STRING(_name, _mode, _str)
190
191 #define dev_printk(lvl, dev, fmt, ...) \
192 device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
193
194 #define dev_emerg(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
195 #define dev_alert(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
196 #define dev_crit(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
197 #define dev_err(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
198 #define dev_warn(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
199 #define dev_notice(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
200 #define dev_info(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
201 #define dev_dbg(dev, fmt, ...) do { } while (0)
202
203 #define dev_WARN(dev, fmt, ...) \
204 device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
205
206 #define dev_WARN_ONCE(dev, condition, fmt, ...) do { \
207 static bool __dev_WARN_ONCE; \
208 bool __ret_warn_on = (condition); \
209 if (unlikely(__ret_warn_on)) { \
210 if (!__dev_WARN_ONCE) { \
211 __dev_WARN_ONCE = true; \
212 device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__); \
213 } \
214 } \
215 } while (0)
216
217 #define dev_info_once(dev, ...) do { \
218 static bool __dev_info_once; \
219 if (!__dev_info_once) { \
220 __dev_info_once = true; \
221 dev_info(dev, __VA_ARGS__); \
222 } \
223 } while (0)
224
225 #define dev_warn_once(dev, ...) do { \
226 static bool __dev_warn_once; \
227 if (!__dev_warn_once) { \
228 __dev_warn_once = 1; \
229 dev_warn(dev, __VA_ARGS__); \
230 } \
231 } while (0)
232
233 #define dev_err_once(dev, ...) do { \
234 static bool __dev_err_once; \
235 if (!__dev_err_once) { \
236 __dev_err_once = 1; \
237 dev_err(dev, __VA_ARGS__); \
238 } \
239 } while (0)
240
241 #define dev_dbg_once(dev, ...) do { \
242 static bool __dev_dbg_once; \
243 if (!__dev_dbg_once) { \
244 __dev_dbg_once = 1; \
245 dev_dbg(dev, __VA_ARGS__); \
246 } \
247 } while (0)
248
249 #define dev_err_ratelimited(dev, ...) do { \
250 static linux_ratelimit_t __ratelimited; \
251 if (linux_ratelimited(&__ratelimited)) \
252 dev_err(dev, __VA_ARGS__); \
253 } while (0)
254
255 #define dev_warn_ratelimited(dev, ...) do { \
256 static linux_ratelimit_t __ratelimited; \
257 if (linux_ratelimited(&__ratelimited)) \
258 dev_warn(dev, __VA_ARGS__); \
259 } while (0)
260
261 #define dev_dbg_ratelimited(dev, ...) do { \
262 static linux_ratelimit_t __ratelimited; \
263 if (linux_ratelimited(&__ratelimited)) \
264 dev_dbg(dev, __VA_ARGS__); \
265 } while (0)
266
267 /* Public and LinuxKPI internal devres functions. */
268 void *lkpi_devres_alloc(void(*release)(struct device *, void *), size_t, gfp_t);
269 void lkpi_devres_add(struct device *, void *);
270 void lkpi_devres_free(void *);
271 void *lkpi_devres_find(struct device *, void(*release)(struct device *, void *),
272 int (*match)(struct device *, void *, void *), void *);
273 int lkpi_devres_destroy(struct device *, void(*release)(struct device *, void *),
274 int (*match)(struct device *, void *, void *), void *);
275 #define devres_alloc(_r, _s, _g) lkpi_devres_alloc(_r, _s, _g)
276 #define devres_add(_d, _p) lkpi_devres_add(_d, _p)
277 #define devres_free(_p) lkpi_devres_free(_p)
278 #define devres_find(_d, _rfn, _mfn, _mp) \
279 lkpi_devres_find(_d, _rfn, _mfn, _mp)
280 #define devres_destroy(_d, _rfn, _mfn, _mp) \
281 lkpi_devres_destroy(_d, _rfn, _mfn, _mp)
282 void lkpi_devres_release_free_list(struct device *);
283 void lkpi_devres_unlink(struct device *, void *);
284 void lkpi_devm_kmalloc_release(struct device *, void *);
285 #define devm_kfree(_d, _p) lkpi_devm_kmalloc_release(_d, _p)
286
287 static inline const char *
dev_driver_string(const struct device * dev)288 dev_driver_string(const struct device *dev)
289 {
290 driver_t *drv;
291 const char *str = "";
292
293 if (dev->bsddev != NULL) {
294 drv = device_get_driver(dev->bsddev);
295 if (drv != NULL)
296 str = drv->name;
297 }
298
299 return (str);
300 }
301
302 static inline void *
dev_get_drvdata(const struct device * dev)303 dev_get_drvdata(const struct device *dev)
304 {
305
306 return dev->driver_data;
307 }
308
309 static inline void
dev_set_drvdata(struct device * dev,void * data)310 dev_set_drvdata(struct device *dev, void *data)
311 {
312
313 dev->driver_data = data;
314 }
315
316 static inline struct device *
get_device(struct device * dev)317 get_device(struct device *dev)
318 {
319
320 if (dev)
321 kobject_get(&dev->kobj);
322
323 return (dev);
324 }
325
326 static inline char *
dev_name(const struct device * dev)327 dev_name(const struct device *dev)
328 {
329
330 return kobject_name(&dev->kobj);
331 }
332
333 #define dev_set_name(_dev, _fmt, ...) \
334 kobject_set_name(&(_dev)->kobj, (_fmt), ##__VA_ARGS__)
335
336 static inline void
put_device(struct device * dev)337 put_device(struct device *dev)
338 {
339
340 if (dev)
341 kobject_put(&dev->kobj);
342 }
343
344 struct class *class_create(struct module *owner, const char *name);
345 #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60400
346 #define class_create(name) class_create(NULL, name)
347 #endif
348
349 static inline int
class_register(struct class * class)350 class_register(struct class *class)
351 {
352
353 class->bsdclass = devclass_create(class->name);
354 kobject_init(&class->kobj, &linux_class_ktype);
355 kobject_set_name(&class->kobj, class->name);
356 kobject_add(&class->kobj, &linux_class_root, class->name);
357
358 return (0);
359 }
360
361 static inline void
class_unregister(struct class * class)362 class_unregister(struct class *class)
363 {
364
365 kobject_put(&class->kobj);
366 }
367
kobj_to_dev(struct kobject * kobj)368 static inline struct device *kobj_to_dev(struct kobject *kobj)
369 {
370 return container_of(kobj, struct device, kobj);
371 }
372
373 struct device *device_create(struct class *class, struct device *parent,
374 dev_t devt, void *drvdata, const char *fmt, ...);
375 struct device *device_create_groups_vargs(struct class *class, struct device *parent,
376 dev_t devt, void *drvdata, const struct attribute_group **groups,
377 const char *fmt, va_list args);
378
379 /*
380 * Devices are registered and created for exporting to sysfs. Create
381 * implies register and register assumes the device fields have been
382 * setup appropriately before being called.
383 */
384 static inline void
device_initialize(struct device * dev)385 device_initialize(struct device *dev)
386 {
387 device_t bsddev = NULL;
388 int unit = -1;
389
390 if (dev->devt) {
391 unit = MINOR(dev->devt);
392 bsddev = devclass_get_device(dev->class->bsdclass, unit);
393 dev->bsddev_attached_here = false;
394 } else if (dev->parent == NULL) {
395 bsddev = devclass_get_device(dev->class->bsdclass, 0);
396 dev->bsddev_attached_here = false;
397 } else {
398 dev->bsddev_attached_here = true;
399 }
400
401 if (bsddev == NULL && dev->parent != NULL) {
402 bsddev = device_add_child(dev->parent->bsddev,
403 dev->class->kobj.name, unit);
404 }
405
406 if (bsddev != NULL)
407 device_set_softc(bsddev, dev);
408
409 dev->bsddev = bsddev;
410 MPASS(dev->bsddev != NULL);
411 kobject_init(&dev->kobj, &linux_dev_ktype);
412
413 spin_lock_init(&dev->devres_lock);
414 INIT_LIST_HEAD(&dev->devres_head);
415 }
416
417 static inline int
device_add(struct device * dev)418 device_add(struct device *dev)
419 {
420 if (dev->bsddev != NULL) {
421 if (dev->devt == 0)
422 dev->devt = makedev(0, device_get_unit(dev->bsddev));
423 }
424 kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev));
425
426 if (dev->groups)
427 return (sysfs_create_groups(&dev->kobj, dev->groups));
428
429 return (0);
430 }
431
432 static inline void
device_create_release(struct device * dev)433 device_create_release(struct device *dev)
434 {
435 kfree(dev);
436 }
437
438 static inline struct device *
device_create_with_groups(struct class * class,struct device * parent,dev_t devt,void * drvdata,const struct attribute_group ** groups,const char * fmt,...)439 device_create_with_groups(struct class *class,
440 struct device *parent, dev_t devt, void *drvdata,
441 const struct attribute_group **groups, const char *fmt, ...)
442 {
443 va_list vargs;
444 struct device *dev;
445
446 va_start(vargs, fmt);
447 dev = device_create_groups_vargs(class, parent, devt, drvdata,
448 groups, fmt, vargs);
449 va_end(vargs);
450 return dev;
451 }
452
453 static inline bool
device_is_registered(struct device * dev)454 device_is_registered(struct device *dev)
455 {
456
457 return (dev->bsddev != NULL);
458 }
459
460 static inline int
device_register(struct device * dev)461 device_register(struct device *dev)
462 {
463 device_t bsddev = NULL;
464 int unit = -1;
465
466 if (device_is_registered(dev))
467 goto done;
468
469 if (dev->devt) {
470 unit = MINOR(dev->devt);
471 bsddev = devclass_get_device(dev->class->bsdclass, unit);
472 dev->bsddev_attached_here = false;
473 } else if (dev->parent == NULL) {
474 bsddev = devclass_get_device(dev->class->bsdclass, 0);
475 dev->bsddev_attached_here = false;
476 } else {
477 dev->bsddev_attached_here = true;
478 }
479 if (bsddev == NULL && dev->parent != NULL) {
480 bsddev = device_add_child(dev->parent->bsddev,
481 dev->class->kobj.name, unit);
482 }
483 if (bsddev != NULL) {
484 if (dev->devt == 0)
485 dev->devt = makedev(0, device_get_unit(bsddev));
486 device_set_softc(bsddev, dev);
487 }
488 dev->bsddev = bsddev;
489 done:
490 kobject_init(&dev->kobj, &linux_dev_ktype);
491 kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev));
492
493 sysfs_create_groups(&dev->kobj, dev->class->dev_groups);
494
495 return (0);
496 }
497
498 static inline void
device_unregister(struct device * dev)499 device_unregister(struct device *dev)
500 {
501 device_t bsddev;
502
503 sysfs_remove_groups(&dev->kobj, dev->class->dev_groups);
504
505 bsddev = dev->bsddev;
506 dev->bsddev = NULL;
507
508 if (bsddev != NULL && dev->bsddev_attached_here) {
509 bus_topo_lock();
510 device_delete_child(device_get_parent(bsddev), bsddev);
511 bus_topo_unlock();
512 }
513 put_device(dev);
514 }
515
516 static inline void
device_del(struct device * dev)517 device_del(struct device *dev)
518 {
519 device_t bsddev;
520
521 bsddev = dev->bsddev;
522 dev->bsddev = NULL;
523
524 if (bsddev != NULL && dev->bsddev_attached_here) {
525 bus_topo_lock();
526 device_delete_child(device_get_parent(bsddev), bsddev);
527 bus_topo_unlock();
528 }
529 }
530
531 static inline void
device_destroy(struct class * class,dev_t devt)532 device_destroy(struct class *class, dev_t devt)
533 {
534 device_t bsddev;
535 int unit;
536
537 unit = MINOR(devt);
538 bsddev = devclass_get_device(class->bsdclass, unit);
539 if (bsddev != NULL)
540 device_unregister(device_get_softc(bsddev));
541 }
542
543 static inline void
device_release_driver(struct device * dev)544 device_release_driver(struct device *dev)
545 {
546
547 #if 0
548 /* This leads to panics. Disable temporarily. Keep to rework. */
549
550 /* We also need to cleanup LinuxKPI bits. What else? */
551 lkpi_devres_release_free_list(dev);
552 dev_set_drvdata(dev, NULL);
553 /* Do not call dev->release! */
554
555 bus_topo_lock();
556 if (device_is_attached(dev->bsddev))
557 device_detach(dev->bsddev);
558 bus_topo_unlock();
559 #endif
560 }
561
562 static inline int
device_reprobe(struct device * dev)563 device_reprobe(struct device *dev)
564 {
565 int error;
566
567 device_release_driver(dev);
568 bus_topo_lock();
569 error = device_probe_and_attach(dev->bsddev);
570 bus_topo_unlock();
571
572 return (-error);
573 }
574
575 static inline void
device_set_wakeup_enable(struct device * dev __unused,bool enable __unused)576 device_set_wakeup_enable(struct device *dev __unused, bool enable __unused)
577 {
578
579 /*
580 * XXX-BZ TODO This is used by wireless drivers supporting WoWLAN which
581 * we currently do not support.
582 */
583 }
584
585 static inline int
device_wakeup_enable(struct device * dev)586 device_wakeup_enable(struct device *dev)
587 {
588
589 device_set_wakeup_enable(dev, true);
590 return (0);
591 }
592
593 static inline bool
device_iommu_mapped(struct device * dev __unused)594 device_iommu_mapped(struct device *dev __unused)
595 {
596 return (false);
597 }
598
599 #define dev_pm_set_driver_flags(dev, flags) do { \
600 } while (0)
601
602 static inline void
linux_class_kfree(struct class * class)603 linux_class_kfree(struct class *class)
604 {
605
606 kfree(class);
607 }
608
609 static inline void
class_destroy(struct class * class)610 class_destroy(struct class *class)
611 {
612
613 if (class == NULL)
614 return;
615 class_unregister(class);
616 }
617
618 static inline int
device_create_file(struct device * dev,const struct device_attribute * attr)619 device_create_file(struct device *dev, const struct device_attribute *attr)
620 {
621
622 if (dev)
623 return sysfs_create_file(&dev->kobj, &attr->attr);
624 return -EINVAL;
625 }
626
627 static inline void
device_remove_file(struct device * dev,const struct device_attribute * attr)628 device_remove_file(struct device *dev, const struct device_attribute *attr)
629 {
630
631 if (dev)
632 sysfs_remove_file(&dev->kobj, &attr->attr);
633 }
634
635 static inline int
class_create_file(struct class * class,const struct class_attribute * attr)636 class_create_file(struct class *class, const struct class_attribute *attr)
637 {
638
639 if (class)
640 return sysfs_create_file(&class->kobj, &attr->attr);
641 return -EINVAL;
642 }
643
644 static inline void
class_remove_file(struct class * class,const struct class_attribute * attr)645 class_remove_file(struct class *class, const struct class_attribute *attr)
646 {
647
648 if (class)
649 sysfs_remove_file(&class->kobj, &attr->attr);
650 }
651
652 #define dev_to_node(dev) linux_dev_to_node(dev)
653 #define of_node_to_nid(node) -1
654 int linux_dev_to_node(struct device *);
655
656 char *kvasprintf(gfp_t, const char *, va_list);
657 char *kasprintf(gfp_t, const char *, ...);
658 char *lkpi_devm_kasprintf(struct device *, gfp_t, const char *, ...);
659
660 #define devm_kasprintf(_dev, _gfp, _fmt, ...) \
661 lkpi_devm_kasprintf(_dev, _gfp, _fmt, ##__VA_ARGS__)
662
663 static __inline void *
devm_kmalloc(struct device * dev,size_t size,gfp_t gfp)664 devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
665 {
666 void *p;
667
668 p = lkpi_devres_alloc(lkpi_devm_kmalloc_release, size, gfp);
669 if (p != NULL)
670 lkpi_devres_add(dev, p);
671
672 return (p);
673 }
674
675 static inline void *
devm_kmemdup(struct device * dev,const void * src,size_t len,gfp_t gfp)676 devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
677 {
678 void *dst;
679
680 if (len == 0)
681 return (NULL);
682
683 dst = devm_kmalloc(dev, len, gfp);
684 if (dst != NULL)
685 memcpy(dst, src, len);
686
687 return (dst);
688 }
689
690 #define devm_kzalloc(_dev, _size, _gfp) \
691 devm_kmalloc((_dev), (_size), (_gfp) | __GFP_ZERO)
692
693 #define devm_kcalloc(_dev, _sizen, _size, _gfp) \
694 devm_kmalloc((_dev), ((_sizen) * (_size)), (_gfp) | __GFP_ZERO)
695
696 int lkpi_devm_add_action(struct device *dev, void (*action)(void *), void *data);
697 #define devm_add_action(dev, action, data) \
698 lkpi_devm_add_action(dev, action, data);
699 int lkpi_devm_add_action_or_reset(struct device *dev, void (*action)(void *), void *data);
700 #define devm_add_action_or_reset(dev, action, data) \
701 lkpi_devm_add_action_or_reset(dev, action, data)
702
703 int lkpi_devm_device_add_group(struct device *dev, const struct attribute_group *group);
704 #define devm_device_add_group(dev, group) \
705 lkpi_devm_device_add_group(dev, group)
706
707 #endif /* _LINUXKPI_LINUX_DEVICE_H_ */
708