Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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, size_t count, unsigned int align,
48 bool no_warn);
49extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
50
51extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
52#endif