1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef __CMA_H__
3 #define __CMA_H__
4
5 #include <linux/init.h>
6 #include <linux/types.h>
7 #include <linux/numa.h>
8
9 #ifdef CONFIG_CMA_AREAS
10 #define MAX_CMA_AREAS CONFIG_CMA_AREAS
11 #endif
12
13 #define CMA_MAX_NAME 64
14
15 /*
16 * the buddy -- especially pageblock merging
17 * -- can deal with only some pageblocks of a
18 * MIGRATE_CMA, we can use pageblock_nr_pages
19 */
20 #define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_p
21 #define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * C
22
23 struct cma;
24
25 extern unsigned long totalcma_pages;
26 extern phys_addr_t cma_get_base(const struct c
27 extern unsigned long cma_get_size(const struct
28 extern const char *cma_get_name(const struct c
29
30 extern int __init cma_declare_contiguous_nid(p
31 phys_addr_t size, phys
32 phys_addr_t alignment,
33 bool fixed, const char
34 int nid);
35 static inline int __init cma_declare_contiguou
36 phys_addr_t size, phys
37 phys_addr_t alignment,
38 bool fixed, const char
39 {
40 return cma_declare_contiguous_nid(base
41 order_per_bit, fixed,
42 }
43 extern int cma_init_reserved_mem(phys_addr_t b
44 unsign
45 const
46 struct
47 extern struct page *cma_alloc(struct cma *cma,
48 bool no_warn);
49 extern bool cma_pages_valid(struct cma *cma, c
50 extern bool cma_release(struct cma *cma, const
51
52 extern int cma_for_each_area(int (*it)(struct
53
54 extern void cma_reserve_pages_on_error(struct
55
56 #ifdef CONFIG_CMA
57 struct folio *cma_alloc_folio(struct cma *cma,
58 bool cma_free_folio(struct cma *cma, const str
59 #else
60 static inline struct folio *cma_alloc_folio(st
61 {
62 return NULL;
63 }
64
65 static inline bool cma_free_folio(struct cma *
66 {
67 return false;
68 }
69 #endif
70
71 #endif
72
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