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6f536635 GC |
1 | #ifndef _ASM_DMA_MAPPING_H_ |
2 | #define _ASM_DMA_MAPPING_H_ | |
3 | ||
4 | /* | |
5 | * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for | |
6 | * documentation. | |
7 | */ | |
8 | ||
9 | #include <linux/scatterlist.h> | |
10 | #include <asm/io.h> | |
11 | #include <asm/swiotlb.h> | |
12 | ||
13 | struct dma_mapping_ops { | |
14 | int (*mapping_error)(dma_addr_t dma_addr); | |
15 | void* (*alloc_coherent)(struct device *dev, size_t size, | |
16 | dma_addr_t *dma_handle, gfp_t gfp); | |
17 | void (*free_coherent)(struct device *dev, size_t size, | |
18 | void *vaddr, dma_addr_t dma_handle); | |
19 | dma_addr_t (*map_single)(struct device *hwdev, void *ptr, | |
20 | size_t size, int direction); | |
21 | /* like map_single, but doesn't check the device mask */ | |
22 | dma_addr_t (*map_simple)(struct device *hwdev, char *ptr, | |
23 | size_t size, int direction); | |
24 | void (*unmap_single)(struct device *dev, dma_addr_t addr, | |
25 | size_t size, int direction); | |
26 | void (*sync_single_for_cpu)(struct device *hwdev, | |
27 | dma_addr_t dma_handle, size_t size, | |
28 | int direction); | |
29 | void (*sync_single_for_device)(struct device *hwdev, | |
30 | dma_addr_t dma_handle, size_t size, | |
31 | int direction); | |
32 | void (*sync_single_range_for_cpu)(struct device *hwdev, | |
33 | dma_addr_t dma_handle, unsigned long offset, | |
34 | size_t size, int direction); | |
35 | void (*sync_single_range_for_device)(struct device *hwdev, | |
36 | dma_addr_t dma_handle, unsigned long offset, | |
37 | size_t size, int direction); | |
38 | void (*sync_sg_for_cpu)(struct device *hwdev, | |
39 | struct scatterlist *sg, int nelems, | |
40 | int direction); | |
41 | void (*sync_sg_for_device)(struct device *hwdev, | |
42 | struct scatterlist *sg, int nelems, | |
43 | int direction); | |
44 | int (*map_sg)(struct device *hwdev, struct scatterlist *sg, | |
45 | int nents, int direction); | |
46 | void (*unmap_sg)(struct device *hwdev, | |
47 | struct scatterlist *sg, int nents, | |
48 | int direction); | |
49 | int (*dma_supported)(struct device *hwdev, u64 mask); | |
50 | int is_phys; | |
51 | }; | |
52 | ||
22456b97 GC |
53 | extern const struct dma_mapping_ops *dma_ops; |
54 | ||
96a388de TG |
55 | #ifdef CONFIG_X86_32 |
56 | # include "dma-mapping_32.h" | |
57 | #else | |
58 | # include "dma-mapping_64.h" | |
59 | #endif | |
6f536635 | 60 | |
22456b97 GC |
61 | static inline dma_addr_t |
62 | dma_map_single(struct device *hwdev, void *ptr, size_t size, | |
63 | int direction) | |
64 | { | |
65 | BUG_ON(!valid_dma_direction(direction)); | |
66 | return dma_ops->map_single(hwdev, ptr, size, direction); | |
67 | } | |
68 | ||
0cb0ae68 GC |
69 | static inline void |
70 | dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, | |
71 | int direction) | |
72 | { | |
73 | BUG_ON(!valid_dma_direction(direction)); | |
74 | if (dma_ops->unmap_single) | |
75 | dma_ops->unmap_single(dev, addr, size, direction); | |
76 | } | |
77 | ||
16a3ce9b GC |
78 | static inline int |
79 | dma_map_sg(struct device *hwdev, struct scatterlist *sg, | |
80 | int nents, int direction) | |
81 | { | |
82 | BUG_ON(!valid_dma_direction(direction)); | |
83 | return dma_ops->map_sg(hwdev, sg, nents, direction); | |
84 | } | |
72c784f8 GC |
85 | |
86 | static inline void | |
87 | dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
88 | int direction) | |
89 | { | |
90 | BUG_ON(!valid_dma_direction(direction)); | |
91 | if (dma_ops->unmap_sg) | |
92 | dma_ops->unmap_sg(hwdev, sg, nents, direction); | |
93 | } | |
c01dd8cf GC |
94 | |
95 | static inline void | |
96 | dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle, | |
97 | size_t size, int direction) | |
98 | { | |
99 | BUG_ON(!valid_dma_direction(direction)); | |
100 | if (dma_ops->sync_single_for_cpu) | |
101 | dma_ops->sync_single_for_cpu(hwdev, dma_handle, size, | |
102 | direction); | |
103 | flush_write_buffers(); | |
104 | } | |
105 | ||
9231b269 GC |
106 | static inline void |
107 | dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle, | |
108 | size_t size, int direction) | |
109 | { | |
110 | BUG_ON(!valid_dma_direction(direction)); | |
111 | if (dma_ops->sync_single_for_device) | |
112 | dma_ops->sync_single_for_device(hwdev, dma_handle, size, | |
113 | direction); | |
114 | flush_write_buffers(); | |
115 | } | |
116 | ||
6f536635 | 117 | #endif |