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 16 struct cma; 17 18 extern unsigned long totalcma_pages; 19 extern phys_addr_t cma_get_base(const struct cma *cma); 20 extern unsigned long cma_get_size(const struct cma *cma); 21 22 extern 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); 26 extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, 27 unsigned int order_per_bit, 28 struct cma **res_cma); 29 extern struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align); 30 extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); 31 #endif 32