| /* 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 |