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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
a254129e JK |
2 | #ifndef __CMA_H__ |
3 | #define __CMA_H__ | |
4 | ||
d5e6eff2 TR |
5 | #include <linux/init.h> |
6 | #include <linux/types.h> | |
8676af1f | 7 | #include <linux/numa.h> |
d5e6eff2 | 8 | |
a254129e JK |
9 | /* |
10 | * There is always at least global CMA area and a few optional | |
11 | * areas configured in kernel .config. | |
12 | */ | |
13 | #ifdef CONFIG_CMA_AREAS | |
14 | #define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS) | |
15 | ||
16 | #else | |
17 | #define MAX_CMA_AREAS (0) | |
18 | ||
19 | #endif | |
20 | ||
21 | struct cma; | |
22 | ||
e48322ab | 23 | extern unsigned long totalcma_pages; |
ac173824 SL |
24 | extern phys_addr_t cma_get_base(const struct cma *cma); |
25 | extern unsigned long cma_get_size(const struct cma *cma); | |
f318dd08 | 26 | extern const char *cma_get_name(const struct cma *cma); |
a254129e | 27 | |
8676af1f | 28 | extern int __init cma_declare_contiguous_nid(phys_addr_t base, |
dda02fd6 | 29 | phys_addr_t size, phys_addr_t limit, |
a254129e | 30 | phys_addr_t alignment, unsigned int order_per_bit, |
8676af1f AB |
31 | bool fixed, const char *name, struct cma **res_cma, |
32 | int nid); | |
33 | static inline int __init cma_declare_contiguous(phys_addr_t base, | |
34 | phys_addr_t size, phys_addr_t limit, | |
35 | phys_addr_t alignment, unsigned int order_per_bit, | |
36 | bool fixed, const char *name, struct cma **res_cma) | |
37 | { | |
38 | return cma_declare_contiguous_nid(base, size, limit, alignment, | |
39 | order_per_bit, fixed, name, res_cma, NUMA_NO_NODE); | |
40 | } | |
ac173824 SL |
41 | extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, |
42 | unsigned int order_per_bit, | |
f318dd08 | 43 | const char *name, |
de9e14ee | 44 | struct cma **res_cma); |
e2f466e3 | 45 | extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, |
65182029 | 46 | bool no_warn); |
ac173824 | 47 | extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); |
e4231bcd LA |
48 | |
49 | extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); | |
a254129e | 50 | #endif |