Commit | Line | Data |
---|---|---|
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) | |
a254129e JK |
15 | #endif |
16 | ||
2281f797 BS |
17 | #define CMA_MAX_NAME 64 |
18 | ||
e16faf26 | 19 | /* |
11ac3e87 | 20 | * the buddy -- especially pageblock merging and alloc_contig_range() |
e16faf26 DH |
21 | * -- can deal with only some pageblocks of a higher-order page being |
22 | * MIGRATE_CMA, we can use pageblock_nr_pages. | |
23 | */ | |
11ac3e87 | 24 | #define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_pages |
e16faf26 DH |
25 | #define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES) |
26 | ||
a254129e JK |
27 | struct cma; |
28 | ||
e48322ab | 29 | extern unsigned long totalcma_pages; |
ac173824 SL |
30 | extern phys_addr_t cma_get_base(const struct cma *cma); |
31 | extern unsigned long cma_get_size(const struct cma *cma); | |
f318dd08 | 32 | extern const char *cma_get_name(const struct cma *cma); |
a254129e | 33 | |
8676af1f | 34 | extern int __init cma_declare_contiguous_nid(phys_addr_t base, |
dda02fd6 | 35 | phys_addr_t size, phys_addr_t limit, |
a254129e | 36 | phys_addr_t alignment, unsigned int order_per_bit, |
8676af1f AB |
37 | bool fixed, const char *name, struct cma **res_cma, |
38 | int nid); | |
39 | static inline int __init cma_declare_contiguous(phys_addr_t base, | |
40 | phys_addr_t size, phys_addr_t limit, | |
41 | phys_addr_t alignment, unsigned int order_per_bit, | |
42 | bool fixed, const char *name, struct cma **res_cma) | |
43 | { | |
44 | return cma_declare_contiguous_nid(base, size, limit, alignment, | |
45 | order_per_bit, fixed, name, res_cma, NUMA_NO_NODE); | |
46 | } | |
ac173824 SL |
47 | extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, |
48 | unsigned int order_per_bit, | |
f318dd08 | 49 | const char *name, |
de9e14ee | 50 | struct cma **res_cma); |
78fa5150 | 51 | extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align, |
65182029 | 52 | bool no_warn); |
9871e2de | 53 | extern bool cma_pages_valid(struct cma *cma, const struct page *pages, unsigned long count); |
78fa5150 | 54 | extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count); |
e4231bcd LA |
55 | |
56 | extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); | |
27d121d0 HB |
57 | |
58 | extern void cma_reserve_pages_on_error(struct cma *cma); | |
a254129e | 59 | #endif |