Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * include/linux/dmapool.h | |
3 | * | |
4 | * Allocation pools for DMAable (coherent) memory. | |
5 | * | |
6 | * This file is licensed under the terms of the GNU General Public | |
7 | * License version 2. This program is licensed "as is" without any | |
8 | * warranty of any kind, whether express or implied. | |
9 | */ | |
10 | ||
11 | #ifndef LINUX_DMAPOOL_H | |
12 | #define LINUX_DMAPOOL_H | |
13 | ||
84be456f | 14 | #include <linux/scatterlist.h> |
1da177e4 | 15 | #include <asm/io.h> |
1da177e4 | 16 | |
ce66b032 MB |
17 | struct device; |
18 | ||
c1ce6c2b GU |
19 | #ifdef CONFIG_HAS_DMA |
20 | ||
1da177e4 LT |
21 | struct dma_pool *dma_pool_create(const char *name, struct device *dev, |
22 | size_t size, size_t align, size_t allocation); | |
23 | ||
24 | void dma_pool_destroy(struct dma_pool *pool); | |
25 | ||
dd0fc66f | 26 | void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, |
3a11ec5e | 27 | dma_addr_t *handle); |
1da177e4 LT |
28 | void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr); |
29 | ||
9ac7849e TH |
30 | /* |
31 | * Managed DMA pool | |
32 | */ | |
33 | struct dma_pool *dmam_pool_create(const char *name, struct device *dev, | |
34 | size_t size, size_t align, size_t allocation); | |
35 | void dmam_pool_destroy(struct dma_pool *pool); | |
36 | ||
c1ce6c2b GU |
37 | #else /* !CONFIG_HAS_DMA */ |
38 | static inline struct dma_pool *dma_pool_create(const char *name, | |
39 | struct device *dev, size_t size, size_t align, size_t allocation) | |
40 | { return NULL; } | |
41 | static inline void dma_pool_destroy(struct dma_pool *pool) { } | |
42 | static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, | |
43 | dma_addr_t *handle) { return NULL; } | |
44 | static inline void dma_pool_free(struct dma_pool *pool, void *vaddr, | |
45 | dma_addr_t addr) { } | |
46 | static inline struct dma_pool *dmam_pool_create(const char *name, | |
47 | struct device *dev, size_t size, size_t align, size_t allocation) | |
48 | { return NULL; } | |
49 | static inline void dmam_pool_destroy(struct dma_pool *pool) { } | |
50 | #endif /* !CONFIG_HAS_DMA */ | |
51 | ||
52 | static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, | |
53 | dma_addr_t *handle) | |
54 | { | |
55 | return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle); | |
56 | } | |
57 | ||
1da177e4 LT |
58 | #endif |
59 |