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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
3f0c8206 MS |
2 | #ifndef __OF_RESERVED_MEM_H |
3 | #define __OF_RESERVED_MEM_H | |
4 | ||
59ce4039 MS |
5 | #include <linux/device.h> |
6 | ||
f618c470 MS |
7 | struct of_phandle_args; |
8 | struct reserved_mem_ops; | |
9 | ||
3f0c8206 MS |
10 | struct reserved_mem { |
11 | const char *name; | |
12 | unsigned long fdt_node; | |
9dcfee01 | 13 | unsigned long phandle; |
f618c470 | 14 | const struct reserved_mem_ops *ops; |
3f0c8206 MS |
15 | phys_addr_t base; |
16 | phys_addr_t size; | |
f618c470 MS |
17 | void *priv; |
18 | }; | |
19 | ||
20 | struct reserved_mem_ops { | |
47f29df7 | 21 | int (*device_init)(struct reserved_mem *rmem, |
f618c470 MS |
22 | struct device *dev); |
23 | void (*device_release)(struct reserved_mem *rmem, | |
24 | struct device *dev); | |
3f0c8206 MS |
25 | }; |
26 | ||
9dd31075 RH |
27 | typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); |
28 | ||
54196ccb RH |
29 | #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ |
30 | _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn) | |
f618c470 | 31 | |
3f0c8206 | 32 | #ifdef CONFIG_OF_RESERVED_MEM |
59ce4039 MS |
33 | |
34 | int of_reserved_mem_device_init_by_idx(struct device *dev, | |
35 | struct device_node *np, int idx); | |
9dcfee01 MS |
36 | void of_reserved_mem_device_release(struct device *dev); |
37 | ||
06dfeef8 BD |
38 | int early_init_dt_alloc_reserved_memory_arch(phys_addr_t size, |
39 | phys_addr_t align, | |
40 | phys_addr_t start, | |
41 | phys_addr_t end, | |
42 | bool nomap, | |
43 | phys_addr_t *res_base); | |
44 | ||
3f0c8206 MS |
45 | void fdt_init_reserved_mem(void); |
46 | void fdt_reserved_mem_save_node(unsigned long node, const char *uname, | |
47 | phys_addr_t base, phys_addr_t size); | |
eb297bc7 | 48 | struct reserved_mem *of_reserved_mem_lookup(struct device_node *np); |
3f0c8206 | 49 | #else |
59ce4039 MS |
50 | static inline int of_reserved_mem_device_init_by_idx(struct device *dev, |
51 | struct device_node *np, int idx) | |
47f29df7 MS |
52 | { |
53 | return -ENOSYS; | |
54 | } | |
9dcfee01 MS |
55 | static inline void of_reserved_mem_device_release(struct device *pdev) { } |
56 | ||
3f0c8206 MS |
57 | static inline void fdt_init_reserved_mem(void) { } |
58 | static inline void fdt_reserved_mem_save_node(unsigned long node, | |
59 | const char *uname, phys_addr_t base, phys_addr_t size) { } | |
eb297bc7 BA |
60 | static inline struct reserved_mem *of_reserved_mem_lookup(struct device_node *np) |
61 | { | |
62 | return NULL; | |
63 | } | |
3f0c8206 MS |
64 | #endif |
65 | ||
59ce4039 MS |
66 | /** |
67 | * of_reserved_mem_device_init() - assign reserved memory region to given device | |
68 | * @dev: Pointer to the device to configure | |
69 | * | |
70 | * This function assigns respective DMA-mapping operations based on the first | |
71 | * reserved memory region specified by 'memory-region' property in device tree | |
72 | * node of the given device. | |
73 | * | |
74 | * Returns error code or zero on success. | |
75 | */ | |
76 | static inline int of_reserved_mem_device_init(struct device *dev) | |
77 | { | |
78 | return of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0); | |
79 | } | |
80 | ||
3f0c8206 | 81 | #endif /* __OF_RESERVED_MEM_H */ |