include/linux/cma.h at v4.10 · tjh.dev/kernel

tjh.dev / kernel

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

kernel / include / linux / cma.h

at v4.10 970 B view raw

 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);
33extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
34#endif