Linux 4.6-rc6
[cris-mirror.git] / include / linux / cma.h
blob29f9e774ab76ef5c1deb019a142af3027a43ebce
1 #ifndef __CMA_H__
2 #define __CMA_H__
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)
11 #else
12 #define MAX_CMA_AREAS (0)
14 #endif
16 struct cma;
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);
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, size_t count, unsigned int align);
30 extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
31 #endif