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
23struct cma;
24
25extern unsigned long totalcma_pages;
26extern phys_addr_t cma_get_base(const struct cma *cma);
27extern unsigned long cma_get_size(const struct cma *cma);
28extern const char *cma_get_name(const struct cma *cma);
29
30extern int __init cma_declare_contiguous_nid(phys_addr_t base,
31			phys_addr_t size, phys_addr_t limit,
32			phys_addr_t alignment, unsigned int order_per_bit,
33			bool fixed, const char *name, struct cma **res_cma,
34			int nid);
35static inline int __init cma_declare_contiguous(phys_addr_t base,
36			phys_addr_t size, phys_addr_t limit,
37			phys_addr_t alignment, unsigned int order_per_bit,
38			bool fixed, const char *name, struct cma **res_cma)
39{
40	return cma_declare_contiguous_nid(base, size, limit, alignment,
41			order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
42}
43extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
44					unsigned int order_per_bit,
45					const char *name,
46					struct cma **res_cma);
47extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align,
48			      bool no_warn);
49extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count);
50
51extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
52#endif

 
 1#ifndef __CMA_H__
 2#define __CMA_H__
 3
 
 
 
 
 4/*
 5 * There is always at least global CMA area and a few optional
 6 * areas configured in kernel .config.
 7 */
 8#ifdef CONFIG_CMA_AREAS
 9#define MAX_CMA_AREAS	(1 + CONFIG_CMA_AREAS)
10
11#else
12#define MAX_CMA_AREAS	(0)
13
14#endif
15
 
 
16struct cma;
17
18extern unsigned long totalcma_pages;
19extern phys_addr_t cma_get_base(const struct cma *cma);
20extern unsigned long cma_get_size(const struct cma *cma);
 
21
22extern int __init cma_declare_contiguous(phys_addr_t base,
23			phys_addr_t size, phys_addr_t limit,
24			phys_addr_t alignment, unsigned int order_per_bit,
25			bool fixed, struct cma **res_cma);
 
 
 
 
 
 
 
 
 
26extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
27					unsigned int order_per_bit,
 
28					struct cma **res_cma);
29extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align);
30extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
 
 
 
31#endif