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1648993f JR |
1 | #ifndef __LINUX_SWIOTLB_H |
2 | #define __LINUX_SWIOTLB_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
6 | struct device; | |
7 | struct dma_attrs; | |
8 | struct scatterlist; | |
9 | ||
0016fdee IC |
10 | /* |
11 | * Maximum allowable number of contiguous slabs to map, | |
12 | * must be a power of 2. What is the appropriate value ? | |
13 | * The complexity of {map,unmap}_single is linearly dependent on this value. | |
14 | */ | |
15 | #define IO_TLB_SEGSIZE 128 | |
16 | ||
0016fdee IC |
17 | /* |
18 | * log of the size of each IO TLB slab. The number of slabs is command line | |
19 | * controllable. | |
20 | */ | |
21 | #define IO_TLB_SHIFT 11 | |
22 | ||
1648993f JR |
23 | extern void |
24 | swiotlb_init(void); | |
25 | ||
26 | extern void | |
27 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, | |
28 | dma_addr_t *dma_handle, gfp_t flags); | |
29 | ||
30 | extern void | |
31 | swiotlb_free_coherent(struct device *hwdev, size_t size, | |
32 | void *vaddr, dma_addr_t dma_handle); | |
33 | ||
f98eee8e FT |
34 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
35 | unsigned long offset, size_t size, | |
36 | enum dma_data_direction dir, | |
37 | struct dma_attrs *attrs); | |
38 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, | |
39 | size_t size, enum dma_data_direction dir, | |
40 | struct dma_attrs *attrs); | |
1648993f JR |
41 | |
42 | extern int | |
43 | swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
44 | int direction); | |
45 | ||
46 | extern void | |
47 | swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
48 | int direction); | |
49 | ||
50 | extern int | |
51 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
160c1d8e | 52 | enum dma_data_direction dir, struct dma_attrs *attrs); |
1648993f JR |
53 | |
54 | extern void | |
55 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
160c1d8e FT |
56 | int nelems, enum dma_data_direction dir, |
57 | struct dma_attrs *attrs); | |
1648993f JR |
58 | |
59 | extern void | |
60 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 61 | size_t size, enum dma_data_direction dir); |
1648993f JR |
62 | |
63 | extern void | |
64 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 65 | int nelems, enum dma_data_direction dir); |
1648993f JR |
66 | |
67 | extern void | |
68 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 69 | size_t size, enum dma_data_direction dir); |
1648993f JR |
70 | |
71 | extern void | |
72 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 73 | int nelems, enum dma_data_direction dir); |
1648993f JR |
74 | |
75 | extern void | |
76 | swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e FT |
77 | unsigned long offset, size_t size, |
78 | enum dma_data_direction dir); | |
1648993f JR |
79 | |
80 | extern void | |
81 | swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
82 | unsigned long offset, size_t size, | |
160c1d8e | 83 | enum dma_data_direction dir); |
1648993f JR |
84 | |
85 | extern int | |
86 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); | |
87 | ||
88 | extern int | |
89 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
90 | ||
5740afdb FT |
91 | #ifdef CONFIG_SWIOTLB |
92 | extern void __init swiotlb_free(void); | |
93 | #else | |
94 | static inline void swiotlb_free(void) { } | |
95 | #endif | |
96 | ||
1648993f | 97 | #endif /* __LINUX_SWIOTLB_H */ |