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
8/*
9 * There is always at least global CMA area and a few optional
10 * areas configured in kernel .config.
11 */
12#ifdef CONFIG_CMA_AREAS
13#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
14
15#else
16#define MAX_CMA_AREAS (0)
17
18#endif
19
20struct cma;
21
22extern unsigned long totalcma_pages;
23extern phys_addr_t cma_get_base(const struct cma *cma);
24extern unsigned long cma_get_size(const struct cma *cma);
25extern const char *cma_get_name(const struct cma *cma);
26
27extern int __init cma_declare_contiguous(phys_addr_t base,
28 phys_addr_t size, phys_addr_t limit,
29 phys_addr_t alignment, unsigned int order_per_bit,
30 bool fixed, const char *name, struct cma **res_cma);
31extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
32 unsigned int order_per_bit,
33 const char *name,
34 struct cma **res_cma);
35extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
36 bool no_warn);
37extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
38
39extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
40#endif