1 /* SPDX-License-Identifier: GPL-2.0 */
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 /*
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 #define CMA_MAX_NAME 64
22
23 struct cma;
24
25 struct cma_alloc_info {
26 unsigned long nr_migrated;
27 unsigned long nr_reclaimed;
28 unsigned long nr_mapped;
29 unsigned int nr_isolate_fail;
30 unsigned int nr_migrate_fail;
31 unsigned int nr_test_fail;
32 };
33
34 extern unsigned long totalcma_pages;
35 extern phys_addr_t cma_get_base(const struct cma *cma);
36 extern unsigned long cma_get_size(const struct cma *cma);
37 extern const char *cma_get_name(const struct cma *cma);
38
39 extern int __init cma_declare_contiguous_nid(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 int nid);
cma_declare_contiguous(phys_addr_t base,phys_addr_t size,phys_addr_t limit,phys_addr_t alignment,unsigned int order_per_bit,bool fixed,const char * name,struct cma ** res_cma)44 static inline int __init cma_declare_contiguous(phys_addr_t base,
45 phys_addr_t size, phys_addr_t limit,
46 phys_addr_t alignment, unsigned int order_per_bit,
47 bool fixed, const char *name, struct cma **res_cma)
48 {
49 return cma_declare_contiguous_nid(base, size, limit, alignment,
50 order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
51 }
52 extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
53 unsigned int order_per_bit,
54 const char *name,
55 struct cma **res_cma);
56 extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
57 gfp_t gfp_mask);
58 extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
59
60 extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
61 #endif
62