41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __CMA_H__
|
|
#define __CMA_H__
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* There is always at least global CMA area and a few optional
|
|
* areas configured in kernel .config.
|
|
*/
|
|
#ifdef CONFIG_CMA_AREAS
|
|
#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
|
|
|
|
#else
|
|
#define MAX_CMA_AREAS (0)
|
|
|
|
#endif
|
|
|
|
struct cma;
|
|
|
|
extern unsigned long totalcma_pages;
|
|
extern phys_addr_t cma_get_base(const struct cma *cma);
|
|
extern unsigned long cma_get_size(const struct cma *cma);
|
|
extern const char *cma_get_name(const struct cma *cma);
|
|
|
|
extern int __init cma_declare_contiguous(phys_addr_t base,
|
|
phys_addr_t size, phys_addr_t limit,
|
|
phys_addr_t alignment, unsigned int order_per_bit,
|
|
bool fixed, const char *name, struct cma **res_cma);
|
|
extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
|
|
unsigned int order_per_bit,
|
|
const char *name,
|
|
struct cma **res_cma);
|
|
extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
|
|
gfp_t gfp_mask);
|
|
extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
|
|
|
|
extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
|
|
#endif
|