diff options
Diffstat (limited to 'include/linux/cma.h')
| -rw-r--r-- | include/linux/cma.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/cma.h b/include/linux/cma.h new file mode 100644 index 000000000000..371b93042520 --- /dev/null +++ b/include/linux/cma.h @@ -0,0 +1,27 @@ +#ifndef __CMA_H__ +#define __CMA_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 phys_addr_t cma_get_base(struct cma *cma); +extern unsigned long cma_get_size(struct cma *cma); + +extern int __init cma_declare_contiguous(phys_addr_t size, + phys_addr_t base, phys_addr_t limit, + phys_addr_t alignment, unsigned int order_per_bit, + bool fixed, struct cma **res_cma); +extern struct page *cma_alloc(struct cma *cma, int count, unsigned int align); +extern bool cma_release(struct cma *cma, struct page *pages, int count); +#endif |