Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef __CMA_H__
2#define __CMA_H__
3
4#include <linux/init.h>
5#include <linux/types.h>
6
7/*
8 * There is always at least global CMA area and a few optional
9 * areas configured in kernel .config.
10 */
11#ifdef CONFIG_CMA_AREAS
12#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
13
14#else
15#define MAX_CMA_AREAS (0)
16
17#endif
18
19struct cma;
20
21extern unsigned long totalcma_pages;
22extern phys_addr_t cma_get_base(const struct cma *cma);
23extern unsigned long cma_get_size(const struct cma *cma);
24
25extern int __init cma_declare_contiguous(phys_addr_t base,
26 phys_addr_t size, phys_addr_t limit,
27 phys_addr_t alignment, unsigned int order_per_bit,
28 bool fixed, struct cma **res_cma);
29extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
30 unsigned int order_per_bit,
31 struct cma **res_cma);
32extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
33 gfp_t gfp_mask);
34extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
35#endif