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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 | ||
6959450e FT |
10 | extern int swiotlb_force; |
11 | ||
0016fdee IC |
12 | /* |
13 | * Maximum allowable number of contiguous slabs to map, | |
14 | * must be a power of 2. What is the appropriate value ? | |
15 | * The complexity of {map,unmap}_single is linearly dependent on this value. | |
16 | */ | |
17 | #define IO_TLB_SEGSIZE 128 | |
18 | ||
0016fdee IC |
19 | /* |
20 | * log of the size of each IO TLB slab. The number of slabs is command line | |
21 | * controllable. | |
22 | */ | |
23 | #define IO_TLB_SHIFT 11 | |
24 | ||
ad32e8cb | 25 | extern void swiotlb_init(int verbose); |
abbceff7 | 26 | extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); |
1648993f JR |
27 | |
28 | extern void | |
29 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, | |
30 | dma_addr_t *dma_handle, gfp_t flags); | |
31 | ||
32 | extern void | |
33 | swiotlb_free_coherent(struct device *hwdev, size_t size, | |
34 | void *vaddr, dma_addr_t dma_handle); | |
35 | ||
f98eee8e FT |
36 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
37 | unsigned long offset, size_t size, | |
38 | enum dma_data_direction dir, | |
39 | struct dma_attrs *attrs); | |
40 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, | |
41 | size_t size, enum dma_data_direction dir, | |
42 | struct dma_attrs *attrs); | |
1648993f JR |
43 | |
44 | extern int | |
45 | swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
46 | int direction); | |
47 | ||
48 | extern void | |
49 | swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
50 | int direction); | |
51 | ||
52 | extern int | |
53 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
160c1d8e | 54 | enum dma_data_direction dir, struct dma_attrs *attrs); |
1648993f JR |
55 | |
56 | extern void | |
57 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
160c1d8e FT |
58 | int nelems, enum dma_data_direction dir, |
59 | struct dma_attrs *attrs); | |
1648993f JR |
60 | |
61 | extern void | |
62 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 63 | size_t size, enum dma_data_direction dir); |
1648993f JR |
64 | |
65 | extern void | |
66 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 67 | int nelems, enum dma_data_direction dir); |
1648993f JR |
68 | |
69 | extern void | |
70 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 71 | size_t size, enum dma_data_direction dir); |
1648993f JR |
72 | |
73 | extern void | |
74 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 75 | int nelems, enum dma_data_direction dir); |
1648993f | 76 | |
1648993f JR |
77 | extern int |
78 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); | |
79 | ||
80 | extern int | |
81 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
82 | ||
5740afdb FT |
83 | #ifdef CONFIG_SWIOTLB |
84 | extern void __init swiotlb_free(void); | |
85 | #else | |
86 | static inline void swiotlb_free(void) { } | |
87 | #endif | |
88 | ||
ad32e8cb | 89 | extern void swiotlb_print_info(void); |
1648993f | 90 | #endif /* __LINUX_SWIOTLB_H */ |