| Joonsoo Kim | a254129 | 2014-08-06 16:05:25 -0700 | [diff] [blame] | 1 | #ifndef __CMA_H__ |
| 2 | #define __CMA_H__ |
| 3 | |
| Thierry Reding | d5e6eff | 2016-12-12 16:43:15 -0800 | [diff] [blame] | 4 | #include <linux/init.h> |
| 5 | #include <linux/types.h> |
| 6 | |
| Joonsoo Kim | a254129 | 2014-08-06 16:05:25 -0700 | [diff] [blame] | 7 | /* |
| 8 | * There is always at least global CMA area and a few optional |
| 9 | * areas configured in kernel .config. |
| 10 | */ |
| 11 | #ifdef CONFIG_CMA_AREAS |
| 12 | #define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS) |
| 13 | |
| 14 | #else |
| 15 | #define MAX_CMA_AREAS (0) |
| 16 | |
| 17 | #endif |
| 18 | |
| 19 | struct cma; |
| 20 | |
| Pintu Kumar | e48322a | 2014-12-18 16:17:15 -0800 | [diff] [blame] | 21 | extern unsigned long totalcma_pages; |
| Sasha Levin | ac17382 | 2015-04-14 15:47:04 -0700 | [diff] [blame] | 22 | extern phys_addr_t cma_get_base(const struct cma *cma); |
| 23 | extern unsigned long cma_get_size(const struct cma *cma); |
| Joonsoo Kim | a254129 | 2014-08-06 16:05:25 -0700 | [diff] [blame] | 24 | |
| Weijie Yang | dda02fd | 2014-10-24 17:47:57 +0800 | [diff] [blame] | 25 | extern int __init cma_declare_contiguous(phys_addr_t base, |
| 26 | phys_addr_t size, phys_addr_t limit, |
| Joonsoo Kim | a254129 | 2014-08-06 16:05:25 -0700 | [diff] [blame] | 27 | phys_addr_t alignment, unsigned int order_per_bit, |
| Joonsoo Kim | c1f733aa | 2014-08-06 16:05:32 -0700 | [diff] [blame] | 28 | bool fixed, struct cma **res_cma); |
| Sasha Levin | ac17382 | 2015-04-14 15:47:04 -0700 | [diff] [blame] | 29 | extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, |
| 30 | unsigned int order_per_bit, |
| Marek Szyprowski | de9e14e | 2014-10-13 15:51:09 -0700 | [diff] [blame] | 31 | struct cma **res_cma); |
| Lucas Stach | e2f466e | 2017-02-24 14:58:41 -0800 | [diff] [blame^] | 32 | extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, |
| 33 | gfp_t gfp_mask); |
| Sasha Levin | ac17382 | 2015-04-14 15:47:04 -0700 | [diff] [blame] | 34 | extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); |
| Joonsoo Kim | a254129 | 2014-08-06 16:05:25 -0700 | [diff] [blame] | 35 | #endif |