1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __CMA_H__
3*4882a593Smuzhiyun #define __CMA_H__
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/init.h>
6*4882a593Smuzhiyun #include <linux/types.h>
7*4882a593Smuzhiyun #include <linux/numa.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun /*
10*4882a593Smuzhiyun * There is always at least global CMA area and a few optional
11*4882a593Smuzhiyun * areas configured in kernel .config.
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun #ifdef CONFIG_CMA_AREAS
14*4882a593Smuzhiyun #define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #else
17*4882a593Smuzhiyun #define MAX_CMA_AREAS (0)
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #endif
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define CMA_MAX_NAME 64
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun struct cma;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun struct cma_alloc_info {
26*4882a593Smuzhiyun unsigned long nr_migrated;
27*4882a593Smuzhiyun unsigned long nr_reclaimed;
28*4882a593Smuzhiyun unsigned long nr_mapped;
29*4882a593Smuzhiyun unsigned int nr_isolate_fail;
30*4882a593Smuzhiyun unsigned int nr_migrate_fail;
31*4882a593Smuzhiyun unsigned int nr_test_fail;
32*4882a593Smuzhiyun };
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun extern unsigned long totalcma_pages;
35*4882a593Smuzhiyun extern phys_addr_t cma_get_base(const struct cma *cma);
36*4882a593Smuzhiyun extern unsigned long cma_get_size(const struct cma *cma);
37*4882a593Smuzhiyun extern const char *cma_get_name(const struct cma *cma);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun extern int __init cma_declare_contiguous_nid(phys_addr_t base,
40*4882a593Smuzhiyun phys_addr_t size, phys_addr_t limit,
41*4882a593Smuzhiyun phys_addr_t alignment, unsigned int order_per_bit,
42*4882a593Smuzhiyun bool fixed, const char *name, struct cma **res_cma,
43*4882a593Smuzhiyun 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*4882a593Smuzhiyun static inline int __init cma_declare_contiguous(phys_addr_t base,
45*4882a593Smuzhiyun phys_addr_t size, phys_addr_t limit,
46*4882a593Smuzhiyun phys_addr_t alignment, unsigned int order_per_bit,
47*4882a593Smuzhiyun bool fixed, const char *name, struct cma **res_cma)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun return cma_declare_contiguous_nid(base, size, limit, alignment,
50*4882a593Smuzhiyun order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
53*4882a593Smuzhiyun unsigned int order_per_bit,
54*4882a593Smuzhiyun const char *name,
55*4882a593Smuzhiyun struct cma **res_cma);
56*4882a593Smuzhiyun extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
57*4882a593Smuzhiyun gfp_t gfp_mask);
58*4882a593Smuzhiyun extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
59*4882a593Smuzhiyun #ifdef CONFIG_NO_GKI
60*4882a593Smuzhiyun extern unsigned long cma_used_pages(void);
61*4882a593Smuzhiyun #endif
62*4882a593Smuzhiyun extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
63*4882a593Smuzhiyun #endif
64