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1 | #ifndef _ASM_GENERIC_DMA_MAPPING_H | |
2 | #define _ASM_GENERIC_DMA_MAPPING_H | |
3 | ||
4 | /* define the dma api to allow compilation but not linking of | |
5 | * dma dependent code. Code that depends on the dma-mapping | |
6 | * API needs to set 'depends on HAS_DMA' in its Kconfig | |
7 | */ | |
8 | ||
9 | struct scatterlist; | |
10 | ||
11 | extern void * | |
12 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, | |
13 | gfp_t flag); | |
14 | ||
15 | extern void | |
16 | dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, | |
17 | dma_addr_t dma_handle); | |
18 | ||
19 | static inline void *dma_alloc_attrs(struct device *dev, size_t size, | |
20 | dma_addr_t *dma_handle, gfp_t flag, | |
21 | struct dma_attrs *attrs) | |
22 | { | |
23 | /* attrs is not supported and ignored */ | |
24 | return dma_alloc_coherent(dev, size, dma_handle, flag); | |
25 | } | |
26 | ||
27 | static inline void dma_free_attrs(struct device *dev, size_t size, | |
28 | void *cpu_addr, dma_addr_t dma_handle, | |
29 | struct dma_attrs *attrs) | |
30 | { | |
31 | /* attrs is not supported and ignored */ | |
32 | dma_free_coherent(dev, size, cpu_addr, dma_handle); | |
33 | } | |
34 | ||
35 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) | |
36 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
37 | ||
38 | extern dma_addr_t | |
39 | dma_map_single(struct device *dev, void *ptr, size_t size, | |
40 | enum dma_data_direction direction); | |
41 | ||
42 | extern void | |
43 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, | |
44 | enum dma_data_direction direction); | |
45 | ||
46 | extern int | |
47 | dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
48 | enum dma_data_direction direction); | |
49 | ||
50 | extern void | |
51 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, | |
52 | enum dma_data_direction direction); | |
53 | ||
54 | extern dma_addr_t | |
55 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, | |
56 | size_t size, enum dma_data_direction direction); | |
57 | ||
58 | extern void | |
59 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, | |
60 | enum dma_data_direction direction); | |
61 | ||
62 | extern void | |
63 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, | |
64 | enum dma_data_direction direction); | |
65 | ||
66 | extern void | |
67 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, | |
68 | unsigned long offset, size_t size, | |
69 | enum dma_data_direction direction); | |
70 | ||
71 | extern void | |
72 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, | |
73 | enum dma_data_direction direction); | |
74 | ||
75 | #define dma_sync_single_for_device dma_sync_single_for_cpu | |
76 | #define dma_sync_single_range_for_device dma_sync_single_range_for_cpu | |
77 | #define dma_sync_sg_for_device dma_sync_sg_for_cpu | |
78 | ||
79 | extern int | |
80 | dma_mapping_error(struct device *dev, dma_addr_t dma_addr); | |
81 | ||
82 | extern int | |
83 | dma_supported(struct device *dev, u64 mask); | |
84 | ||
85 | extern int | |
86 | dma_set_mask(struct device *dev, u64 mask); | |
87 | ||
88 | extern int | |
89 | dma_get_cache_alignment(void); | |
90 | ||
91 | extern void | |
92 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, | |
93 | enum dma_data_direction direction); | |
94 | ||
95 | #endif /* _ASM_GENERIC_DMA_MAPPING_H */ |