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Diffstat (limited to '')
-rw-r--r-- | include/linux/cma.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/include/linux/cma.h b/include/linux/cma.h new file mode 100644 index 000000000..217999c8a --- /dev/null +++ b/include/linux/cma.h @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __CMA_H__ +#define __CMA_H__ + +#include <linux/init.h> +#include <linux/types.h> +#include <linux/numa.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 + +#define CMA_MAX_NAME 64 + +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 const char *cma_get_name(const struct cma *cma); + +extern int __init cma_declare_contiguous_nid(phys_addr_t base, + phys_addr_t size, phys_addr_t limit, + phys_addr_t alignment, unsigned int order_per_bit, + bool fixed, const char *name, struct cma **res_cma, + int nid); +static inline 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, const char *name, struct cma **res_cma) +{ + return cma_declare_contiguous_nid(base, size, limit, alignment, + order_per_bit, fixed, name, res_cma, NUMA_NO_NODE); +} +extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, + unsigned int order_per_bit, + const char *name, + struct cma **res_cma); +extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, + bool no_warn); +extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); + +extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); +#endif |