diff options
Diffstat (limited to 'kernel/include/linux/cma.h')
| -rw-r--r-- | kernel/include/linux/cma.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/kernel/include/linux/cma.h b/kernel/include/linux/cma.h new file mode 100644 index 000000000..f7ef093ec --- /dev/null +++ b/kernel/include/linux/cma.h @@ -0,0 +1,31 @@ +#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 unsigned long totalcma_pages; +extern phys_addr_t cma_get_base(const struct cma *cma); +extern unsigned long cma_get_size(const struct cma *cma); + +extern int __init cma_declare_contiguous(phys_addr_t base, + phys_addr_t size, phys_addr_t limit, + phys_addr_t alignment, unsigned int order_per_bit, + bool fixed, struct cma **res_cma); +extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, + unsigned int order_per_bit, + struct cma **res_cma); +extern struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align); +extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); +#endif |