1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _DEVICE_DEVRES_H_
3#define _DEVICE_DEVRES_H_
4
5#include <linux/err.h>
6#include <linux/gfp_types.h>
7#include <linux/numa.h>
8#include <linux/overflow.h>
9#include <linux/stdarg.h>
10#include <linux/types.h>
11#include <asm/bug.h>
12
13struct device;
14struct device_node;
15struct resource;
16
17/* device resource management */
18typedef void (*dr_release_t)(struct device *dev, void *res);
19typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data);
20
21void * __malloc
22__devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp, int nid, const char *name);
23#define devres_alloc(release, size, gfp) \
24 __devres_alloc_node(release, size, gfp, NUMA_NO_NODE, #release)
25#define devres_alloc_node(release, size, gfp, nid) \
26 __devres_alloc_node(release, size, gfp, nid, #release)
27
28void devres_for_each_res(struct device *dev, dr_release_t release,
29 dr_match_t match, void *match_data,
30 void (*fn)(struct device *, void *, void *),
31 void *data);
32void devres_free(void *res);
33void devres_add(struct device *dev, void *res);
34void *devres_find(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
35void *devres_get(struct device *dev, void *new_res, dr_match_t match, void *match_data);
36void *devres_remove(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
37int devres_destroy(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
38int devres_release(struct device *dev, dr_release_t release, dr_match_t match, void *match_data);
39
40/* devres group */
41void * __must_check devres_open_group(struct device *dev, void *id, gfp_t gfp);
42void devres_close_group(struct device *dev, void *id);
43void devres_remove_group(struct device *dev, void *id);
44int devres_release_group(struct device *dev, void *id);
45
46/* managed devm_k.alloc/kfree for device drivers */
47void * __alloc_size(2)
48devm_kmalloc(struct device *dev, size_t size, gfp_t gfp);
49void * __must_check __realloc_size(3)
50devm_krealloc(struct device *dev, void *ptr, size_t size, gfp_t gfp);
51static inline void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)
52{
53 return devm_kmalloc(dev, size, gfp: gfp | __GFP_ZERO);
54}
55static inline void *devm_kmalloc_array(struct device *dev, size_t n, size_t size, gfp_t flags)
56{
57 size_t bytes;
58
59 if (unlikely(check_mul_overflow(n, size, &bytes)))
60 return NULL;
61
62 return devm_kmalloc(dev, size: bytes, gfp: flags);
63}
64static inline void *devm_kcalloc(struct device *dev, size_t n, size_t size, gfp_t flags)
65{
66 return devm_kmalloc_array(dev, n, size, flags: flags | __GFP_ZERO);
67}
68static inline __realloc_size(3, 4) void * __must_check
69devm_krealloc_array(struct device *dev, void *p, size_t new_n, size_t new_size, gfp_t flags)
70{
71 size_t bytes;
72
73 if (unlikely(check_mul_overflow(new_n, new_size, &bytes)))
74 return NULL;
75
76 return devm_krealloc(dev, ptr: p, size: bytes, gfp: flags);
77}
78
79void devm_kfree(struct device *dev, const void *p);
80
81void * __realloc_size(3)
82devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp);
83static inline void *devm_kmemdup_array(struct device *dev, const void *src,
84 size_t n, size_t size, gfp_t flags)
85{
86 return devm_kmemdup(dev, src, len: size_mul(factor1: size, factor2: n), gfp: flags);
87}
88
89char * __malloc
90devm_kstrdup(struct device *dev, const char *s, gfp_t gfp);
91const char *devm_kstrdup_const(struct device *dev, const char *s, gfp_t gfp);
92char * __printf(3, 0) __malloc
93devm_kvasprintf(struct device *dev, gfp_t gfp, const char *fmt, va_list ap);
94char * __printf(3, 4) __malloc
95devm_kasprintf(struct device *dev, gfp_t gfp, const char *fmt, ...);
96
97unsigned long devm_get_free_pages(struct device *dev, gfp_t gfp_mask, unsigned int order);
98void devm_free_pages(struct device *dev, unsigned long addr);
99
100#ifdef CONFIG_HAS_IOMEM
101
102void __iomem *devm_ioremap_resource(struct device *dev, const struct resource *res);
103void __iomem *devm_ioremap_resource_wc(struct device *dev, const struct resource *res);
104
105void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
106 resource_size_t *size);
107#else
108
109static inline
110void __iomem *devm_ioremap_resource(struct device *dev, const struct resource *res)
111{
112 return IOMEM_ERR_PTR(-EINVAL);
113}
114
115static inline
116void __iomem *devm_ioremap_resource_wc(struct device *dev, const struct resource *res)
117{
118 return IOMEM_ERR_PTR(-EINVAL);
119}
120
121static inline
122void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
123 resource_size_t *size)
124{
125 return IOMEM_ERR_PTR(-EINVAL);
126}
127
128#endif
129
130/* allows to add/remove a custom action to devres stack */
131int devm_remove_action_nowarn(struct device *dev, void (*action)(void *), void *data);
132
133/**
134 * devm_remove_action() - removes previously added custom action
135 * @dev: Device that owns the action
136 * @action: Function implementing the action
137 * @data: Pointer to data passed to @action implementation
138 *
139 * Removes instance of @action previously added by devm_add_action().
140 * Both action and data should match one of the existing entries.
141 */
142static inline
143void devm_remove_action(struct device *dev, void (*action)(void *), void *data)
144{
145 WARN_ON(devm_remove_action_nowarn(dev, action, data));
146}
147
148void devm_release_action(struct device *dev, void (*action)(void *), void *data);
149
150int __devm_add_action(struct device *dev, void (*action)(void *), void *data, const char *name);
151#define devm_add_action(dev, action, data) \
152 __devm_add_action(dev, action, data, #action)
153
154static inline int __devm_add_action_or_reset(struct device *dev, void (*action)(void *),
155 void *data, const char *name)
156{
157 int ret;
158
159 ret = __devm_add_action(dev, action, data, name);
160 if (ret)
161 action(data);
162
163 return ret;
164}
165#define devm_add_action_or_reset(dev, action, data) \
166 __devm_add_action_or_reset(dev, action, data, #action)
167
168bool devm_is_action_added(struct device *dev, void (*action)(void *), void *data);
169
170#endif /* _DEVICE_DEVRES_H_ */
171

source code of linux/include/linux/device/devres.h

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