1#ifndef __CMA_H__ 2#define __CMA_H__ 3 4/* 5 * There is always at least global CMA area and a few optional 6 * areas configured in kernel .config. 7 */ 8#ifdef CONFIG_CMA_AREAS 9#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS) 10 11#else 12#define MAX_CMA_AREAS (0) 13 14#endif 15 16struct cma; 17 18extern unsigned long totalcma_pages; 19extern phys_addr_t cma_get_base(const struct cma *cma); 20extern unsigned long cma_get_size(const struct cma *cma); 21 22extern int __init cma_declare_contiguous(phys_addr_t base, 23 phys_addr_t size, phys_addr_t limit, 24 phys_addr_t alignment, unsigned int order_per_bit, 25 bool fixed, struct cma **res_cma); 26extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, 27 unsigned int order_per_bit, 28 struct cma **res_cma); 29extern struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align); 30extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); 31#endif 32