| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __CMA_H__ |
| 3 | #define __CMA_H__ |
| 4 | |
| 5 | #include <linux/init.h> |
| 6 | #include <linux/types.h> |
| 7 | |
| 8 | /* |
| 9 | * There is always at least global CMA area and a few optional |
| 10 | * areas configured in kernel .config. |
| 11 | */ |
| 12 | #ifdef CONFIG_CMA_AREAS |
| 13 | #define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS) |
| 14 | |
| 15 | #else |
| 16 | #define MAX_CMA_AREAS (0) |
| 17 | |
| 18 | #endif |
| 19 | |
| 20 | struct cma; |
| 21 | |
| 22 | extern unsigned long totalcma_pages; |
| 23 | extern phys_addr_t cma_get_base(const struct cma *cma); |
| 24 | extern unsigned long cma_get_size(const struct cma *cma); |
| 25 | extern const char *cma_get_name(const struct cma *cma); |
| 26 | |
| 27 | extern int __init cma_declare_contiguous(phys_addr_t base, |
| 28 | phys_addr_t size, phys_addr_t limit, |
| 29 | phys_addr_t alignment, unsigned int order_per_bit, |
| 30 | bool fixed, const char *name, struct cma **res_cma); |
| 31 | extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, |
| 32 | unsigned int order_per_bit, |
| 33 | const char *name, |
| 34 | struct cma **res_cma); |
| 35 | extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, |
| 36 | bool no_warn); |
| 37 | extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); |
| 38 | |
| 39 | extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); |
| 40 | #endif |