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 19 struct cma; 20 21 extern unsigned long totalcma_pages; 22 extern phys_addr_t cma_get_base(const struct cma *cma); 23 extern unsigned long cma_get_size(const struct cma *cma); 24 25 extern 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); 29 extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, 30 unsigned int order_per_bit, 31 struct cma **res_cma); 32 extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align); 33 extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); 34 #endif 35