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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 | ||
17 | ||
18 | /* | |
19 | * log of the size of each IO TLB slab. The number of slabs is command line | |
20 | * controllable. | |
21 | */ | |
22 | #define IO_TLB_SHIFT 11 | |
23 | ||
1648993f JR |
24 | extern void |
25 | swiotlb_init(void); | |
26 | ||
8c5df16b JF |
27 | extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs); |
28 | extern void *swiotlb_alloc(unsigned order, unsigned long nslabs); | |
29 | ||
70a7d3cc JF |
30 | extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, |
31 | phys_addr_t address); | |
42d7c5e3 BB |
32 | extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, |
33 | dma_addr_t address); | |
e08e1f7a | 34 | |
0b8698ab | 35 | extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size); |
b81ea27b | 36 | |
1648993f JR |
37 | extern void |
38 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, | |
39 | dma_addr_t *dma_handle, gfp_t flags); | |
40 | ||
41 | extern void | |
42 | swiotlb_free_coherent(struct device *hwdev, size_t size, | |
43 | void *vaddr, dma_addr_t dma_handle); | |
44 | ||
f98eee8e FT |
45 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
46 | unsigned long offset, size_t size, | |
47 | enum dma_data_direction dir, | |
48 | struct dma_attrs *attrs); | |
49 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, | |
50 | size_t size, enum dma_data_direction dir, | |
51 | struct dma_attrs *attrs); | |
1648993f JR |
52 | |
53 | extern int | |
54 | swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
55 | int direction); | |
56 | ||
57 | extern void | |
58 | swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
59 | int direction); | |
60 | ||
61 | extern int | |
62 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
160c1d8e | 63 | enum dma_data_direction dir, struct dma_attrs *attrs); |
1648993f JR |
64 | |
65 | extern void | |
66 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
160c1d8e FT |
67 | int nelems, enum dma_data_direction dir, |
68 | struct dma_attrs *attrs); | |
1648993f JR |
69 | |
70 | extern void | |
71 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 72 | size_t size, enum dma_data_direction dir); |
1648993f JR |
73 | |
74 | extern void | |
75 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 76 | int nelems, enum dma_data_direction dir); |
1648993f JR |
77 | |
78 | extern void | |
79 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 80 | size_t size, enum dma_data_direction dir); |
1648993f JR |
81 | |
82 | extern void | |
83 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 84 | int nelems, enum dma_data_direction dir); |
1648993f JR |
85 | |
86 | extern void | |
87 | swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e FT |
88 | unsigned long offset, size_t size, |
89 | enum dma_data_direction dir); | |
1648993f JR |
90 | |
91 | extern void | |
92 | swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
93 | unsigned long offset, size_t size, | |
160c1d8e | 94 | enum dma_data_direction dir); |
1648993f JR |
95 | |
96 | extern int | |
97 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); | |
98 | ||
99 | extern int | |
100 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
101 | ||
102 | #endif /* __LINUX_SWIOTLB_H */ |