xref: /freebsd/sys/compat/linuxkpi/common/include/linux/device.h (revision 8ea366f40084010c14fe40b3aebb42b459b195cc)
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
show_class_attr_string(struct class * class,struct class_attribute * attr,char * buf)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 /* Public and LinuxKPI internal devres functions. */
271 void *lkpi_devres_alloc(void(*release)(struct device *, void *), size_t, gfp_t);
272 void lkpi_devres_add(struct device *, void *);
273 void lkpi_devres_free(void *);
274 void *lkpi_devres_find(struct device *, void(*release)(struct device *, void *),
275     int (*match)(struct device *, void *, void *), void *);
276 int lkpi_devres_destroy(struct device *, void(*release)(struct device *, void *),
277     int (*match)(struct device *, void *, void *), void *);
278 #define	devres_alloc(_r, _s, _g)	lkpi_devres_alloc(_r, _s, _g)
279 #define	devres_add(_d, _p)		lkpi_devres_add(_d, _p)
280 #define	devres_free(_p)			lkpi_devres_free(_p)
281 #define	devres_find(_d, _rfn, _mfn, _mp) \
282 					lkpi_devres_find(_d, _rfn, _mfn, _mp)
283 #define	devres_destroy(_d, _rfn, _mfn, _mp) \
284 					lkpi_devres_destroy(_d, _rfn, _mfn, _mp)
285 void lkpi_devres_release_free_list(struct device *);
286 void lkpi_devres_unlink(struct device *, void *);
287 void lkpi_devm_kmalloc_release(struct device *, void *);
288 void lkpi_devm_kfree(struct device *, const void *);
289 #define	devm_kfree(_d, _p)		lkpi_devm_kfree(_d, _p)
290 
291 static inline const char *
dev_driver_string(const struct device * dev)292 dev_driver_string(const struct device *dev)
293 {
294 	driver_t *drv;
295 	const char *str = "";
296 
297 	if (dev->bsddev != NULL) {
298 		drv = device_get_driver(dev->bsddev);
299 		if (drv != NULL)
300 			str = drv->name;
301 	}
302 
303 	return (str);
304 }
305 
306 static inline void *
dev_get_drvdata(const struct device * dev)307 dev_get_drvdata(const struct device *dev)
308 {
309 
310 	return dev->driver_data;
311 }
312 
313 static inline void
dev_set_drvdata(struct device * dev,void * data)314 dev_set_drvdata(struct device *dev, void *data)
315 {
316 
317 	dev->driver_data = data;
318 }
319 
320 static inline struct device *
get_device(struct device * dev)321 get_device(struct device *dev)
322 {
323 
324 	if (dev)
325 		kobject_get(&dev->kobj);
326 
327 	return (dev);
328 }
329 
330 static inline char *
dev_name(const struct device * dev)331 dev_name(const struct device *dev)
332 {
333 
334 	return kobject_name(&dev->kobj);
335 }
336 
337 static inline bool
dev_is_removable(struct device * dev)338 dev_is_removable(struct device *dev)
339 {
340 
341 	return (false);
342 }
343 
344 #define	dev_set_name(_dev, _fmt, ...)					\
345 	kobject_set_name(&(_dev)->kobj, (_fmt), ##__VA_ARGS__)
346 
347 static inline void
put_device(struct device * dev)348 put_device(struct device *dev)
349 {
350 
351 	if (dev)
352 		kobject_put(&dev->kobj);
353 }
354 
355 struct class *lkpi_class_create(const char *name);
356 #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60400
357 #define	class_create(name)		lkpi_class_create(name)
358 #else
359 #define	class_create(owner, name)	lkpi_class_create(name)
360 #endif
361 
362 static inline int
class_register(struct class * class)363 class_register(struct class *class)
364 {
365 
366 	class->bsdclass = devclass_create(class->name);
367 	kobject_init(&class->kobj, &linux_class_ktype);
368 	kobject_set_name(&class->kobj, class->name);
369 	kobject_add(&class->kobj, &linux_class_root, class->name);
370 
371 	return (0);
372 }
373 
374 static inline void
class_unregister(struct class * class)375 class_unregister(struct class *class)
376 {
377 
378 	kobject_put(&class->kobj);
379 }
380 
kobj_to_dev(struct kobject * kobj)381 static inline struct device *kobj_to_dev(struct kobject *kobj)
382 {
383 	return container_of(kobj, struct device, kobj);
384 }
385 
386 struct device *device_create(struct class *class, struct device *parent,
387 	    dev_t devt, void *drvdata, const char *fmt, ...);
388 struct device *device_create_groups_vargs(struct class *class, struct device *parent,
389     dev_t devt, void *drvdata, const struct attribute_group **groups,
390     const char *fmt, va_list args);
391 
392 /*
393  * Devices are registered and created for exporting to sysfs. Create
394  * implies register and register assumes the device fields have been
395  * setup appropriately before being called.
396  */
397 static inline void
device_initialize(struct device * dev)398 device_initialize(struct device *dev)
399 {
400 	device_t bsddev = NULL;
401 	int unit = -1;
402 
403 	if (dev->devt) {
404 		unit = MINOR(dev->devt);
405 		bsddev = devclass_get_device(dev->class->bsdclass, unit);
406 		dev->bsddev_attached_here = false;
407 	} else if (dev->parent == NULL) {
408 		bsddev = devclass_get_device(dev->class->bsdclass, 0);
409 		dev->bsddev_attached_here = false;
410 	} else {
411 		dev->bsddev_attached_here = true;
412 	}
413 
414 	if (bsddev == NULL && dev->parent != NULL) {
415 		bsddev = device_add_child(dev->parent->bsddev,
416 		    dev->class->kobj.name, unit);
417 	}
418 
419 	if (bsddev != NULL)
420 		device_set_softc(bsddev, dev);
421 
422 	dev->bsddev = bsddev;
423 	MPASS(dev->bsddev != NULL);
424 	kobject_init(&dev->kobj, &linux_dev_ktype);
425 
426 	spin_lock_init(&dev->devres_lock);
427 	INIT_LIST_HEAD(&dev->devres_head);
428 }
429 
430 static inline int
device_add(struct device * dev)431 device_add(struct device *dev)
432 {
433 	if (dev->bsddev != NULL) {
434 		if (dev->devt == 0)
435 			dev->devt = makedev(0, device_get_unit(dev->bsddev));
436 	}
437 	kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev));
438 
439 	if (dev->groups)
440 		return (sysfs_create_groups(&dev->kobj, dev->groups));
441 
442 	return (0);
443 }
444 
445 static inline void
device_create_release(struct device * dev)446 device_create_release(struct device *dev)
447 {
448 	kfree(dev);
449 }
450 
451 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,...)452 device_create_with_groups(struct class *class,
453     struct device *parent, dev_t devt, void *drvdata,
454     const struct attribute_group **groups, const char *fmt, ...)
455 {
456 	va_list vargs;
457 	struct device *dev;
458 
459 	va_start(vargs, fmt);
460 	dev = device_create_groups_vargs(class, parent, devt, drvdata,
461 	    groups, fmt, vargs);
462 	va_end(vargs);
463 	return dev;
464 }
465 
466 static inline bool
device_is_registered(struct device * dev)467 device_is_registered(struct device *dev)
468 {
469 
470 	return (dev->bsddev != NULL);
471 }
472 
473 static inline int
device_register(struct device * dev)474 device_register(struct device *dev)
475 {
476 	device_t bsddev = NULL;
477 	int unit = -1;
478 
479 	if (device_is_registered(dev))
480 		goto done;
481 
482 	if (dev->devt) {
483 		unit = MINOR(dev->devt);
484 		bsddev = devclass_get_device(dev->class->bsdclass, unit);
485 		dev->bsddev_attached_here = false;
486 	} else if (dev->parent == NULL) {
487 		bsddev = devclass_get_device(dev->class->bsdclass, 0);
488 		dev->bsddev_attached_here = false;
489 	} else {
490 		dev->bsddev_attached_here = true;
491 	}
492 	if (bsddev == NULL && dev->parent != NULL) {
493 		bsddev = device_add_child(dev->parent->bsddev,
494 		    dev->class->kobj.name, unit);
495 	}
496 	if (bsddev != NULL) {
497 		if (dev->devt == 0)
498 			dev->devt = makedev(0, device_get_unit(bsddev));
499 		device_set_softc(bsddev, dev);
500 	}
501 	dev->bsddev = bsddev;
502 done:
503 	kobject_init(&dev->kobj, &linux_dev_ktype);
504 	kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev));
505 
506 	sysfs_create_groups(&dev->kobj, dev->class->dev_groups);
507 
508 	return (0);
509 }
510 
511 static inline void
device_unregister(struct device * dev)512 device_unregister(struct device *dev)
513 {
514 	device_t bsddev;
515 
516 	sysfs_remove_groups(&dev->kobj, dev->class->dev_groups);
517 
518 	bsddev = dev->bsddev;
519 	dev->bsddev = NULL;
520 
521 	if (bsddev != NULL && dev->bsddev_attached_here) {
522 		bus_topo_lock();
523 		device_delete_child(device_get_parent(bsddev), bsddev);
524 		bus_topo_unlock();
525 	}
526 	put_device(dev);
527 }
528 
529 static inline void
device_del(struct device * dev)530 device_del(struct device *dev)
531 {
532 	device_t bsddev;
533 
534 	bsddev = dev->bsddev;
535 	dev->bsddev = NULL;
536 
537 	if (bsddev != NULL && dev->bsddev_attached_here) {
538 		bus_topo_lock();
539 		device_delete_child(device_get_parent(bsddev), bsddev);
540 		bus_topo_unlock();
541 	}
542 }
543 
544 static inline void
device_destroy(struct class * class,dev_t devt)545 device_destroy(struct class *class, dev_t devt)
546 {
547 	device_t bsddev;
548 	int unit;
549 
550 	unit = MINOR(devt);
551 	bsddev = devclass_get_device(class->bsdclass, unit);
552 	if (bsddev != NULL)
553 		device_unregister(device_get_softc(bsddev));
554 }
555 
556 static inline void
device_release_driver(struct device * dev)557 device_release_driver(struct device *dev)
558 {
559 
560 #if 0
561 	/* This leads to panics. Disable temporarily. Keep to rework. */
562 
563 	/* We also need to cleanup LinuxKPI bits. What else? */
564 	lkpi_devres_release_free_list(dev);
565 	dev_set_drvdata(dev, NULL);
566 	/* Do not call dev->release! */
567 
568 	bus_topo_lock();
569 	if (device_is_attached(dev->bsddev))
570 		device_detach(dev->bsddev);
571 	bus_topo_unlock();
572 #endif
573 }
574 
575 static inline int
device_reprobe(struct device * dev)576 device_reprobe(struct device *dev)
577 {
578 	int error;
579 
580 	device_release_driver(dev);
581 	bus_topo_lock();
582 	error = device_probe_and_attach(dev->bsddev);
583 	bus_topo_unlock();
584 
585 	return (-error);
586 }
587 
588 static inline void
device_set_wakeup_enable(struct device * dev __unused,bool enable __unused)589 device_set_wakeup_enable(struct device *dev __unused, bool enable __unused)
590 {
591 
592 	/*
593 	 * XXX-BZ TODO This is used by wireless drivers supporting WoWLAN which
594 	 * we currently do not support.
595 	 */
596 }
597 
598 static inline int
device_wakeup_enable(struct device * dev)599 device_wakeup_enable(struct device *dev)
600 {
601 
602 	device_set_wakeup_enable(dev, true);
603 	return (0);
604 }
605 
606 static inline bool
device_iommu_mapped(struct device * dev __unused)607 device_iommu_mapped(struct device *dev __unused)
608 {
609 	return (false);
610 }
611 
612 #define	dev_pm_set_driver_flags(dev, flags) do { \
613 } while (0)
614 
615 static inline void
linux_class_kfree(struct class * class)616 linux_class_kfree(struct class *class)
617 {
618 
619 	kfree(class);
620 }
621 
622 static inline void
class_destroy(struct class * class)623 class_destroy(struct class *class)
624 {
625 
626 	if (class == NULL)
627 		return;
628 	class_unregister(class);
629 }
630 
631 static inline int
device_create_file(struct device * dev,const struct device_attribute * attr)632 device_create_file(struct device *dev, const struct device_attribute *attr)
633 {
634 
635 	if (dev)
636 		return sysfs_create_file(&dev->kobj, &attr->attr);
637 	return -EINVAL;
638 }
639 
640 static inline void
device_remove_file(struct device * dev,const struct device_attribute * attr)641 device_remove_file(struct device *dev, const struct device_attribute *attr)
642 {
643 
644 	if (dev)
645 		sysfs_remove_file(&dev->kobj, &attr->attr);
646 }
647 
648 static inline int
class_create_file(struct class * class,const struct class_attribute * attr)649 class_create_file(struct class *class, const struct class_attribute *attr)
650 {
651 
652 	if (class)
653 		return sysfs_create_file(&class->kobj, &attr->attr);
654 	return -EINVAL;
655 }
656 
657 static inline void
class_remove_file(struct class * class,const struct class_attribute * attr)658 class_remove_file(struct class *class, const struct class_attribute *attr)
659 {
660 
661 	if (class)
662 		sysfs_remove_file(&class->kobj, &attr->attr);
663 }
664 
665 #define	dev_to_node(dev) linux_dev_to_node(dev)
666 #define	of_node_to_nid(node) -1
667 int linux_dev_to_node(struct device *);
668 
669 char *kvasprintf(gfp_t, const char *, va_list);
670 char *kasprintf(gfp_t, const char *, ...);
671 char *lkpi_devm_kasprintf(struct device *, gfp_t, const char *, ...);
672 
673 #define	devm_kasprintf(_dev, _gfp, _fmt, ...)			\
674     lkpi_devm_kasprintf(_dev, _gfp, _fmt, ##__VA_ARGS__)
675 
676 static __inline void *
devm_kmalloc(struct device * dev,size_t size,gfp_t gfp)677 devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
678 {
679 	void *p;
680 
681 	p = lkpi_devres_alloc(lkpi_devm_kmalloc_release, size, gfp);
682 	if (p != NULL)
683 		lkpi_devres_add(dev, p);
684 
685 	return (p);
686 }
687 
688 static inline void *
devm_kmemdup(struct device * dev,const void * src,size_t len,gfp_t gfp)689 devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
690 {
691 	void *dst;
692 
693 	if (len == 0)
694 		return (NULL);
695 
696 	dst = devm_kmalloc(dev, len, gfp);
697 	if (dst != NULL)
698 		memcpy(dst, src, len);
699 
700 	return (dst);
701 }
702 
703 #define	devm_kzalloc(_dev, _size, _gfp)				\
704     devm_kmalloc((_dev), (_size), (_gfp) | __GFP_ZERO)
705 
706 #define	devm_kcalloc(_dev, _sizen, _size, _gfp)			\
707     devm_kmalloc((_dev), ((_sizen) * (_size)), (_gfp) | __GFP_ZERO)
708 
709 int lkpi_devm_add_action(struct device *dev, void (*action)(void *), void *data);
710 #define	devm_add_action(dev, action, data)	\
711 	lkpi_devm_add_action(dev, action, data);
712 int lkpi_devm_add_action_or_reset(struct device *dev, void (*action)(void *), void *data);
713 #define	devm_add_action_or_reset(dev, action, data)	\
714 	lkpi_devm_add_action_or_reset(dev, action, data)
715 
716 int lkpi_devm_device_add_group(struct device *dev, const struct attribute_group *group);
717 #define	devm_device_add_group(dev, group)	\
718 	lkpi_devm_device_add_group(dev, group)
719 
720 #endif	/* _LINUXKPI_LINUX_DEVICE_H_ */
721