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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 | ||
e08e1f7a IC |
30 | extern dma_addr_t swiotlb_phys_to_bus(phys_addr_t address); |
31 | extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address); | |
32 | ||
1648993f JR |
33 | extern void |
34 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, | |
35 | dma_addr_t *dma_handle, gfp_t flags); | |
36 | ||
37 | extern void | |
38 | swiotlb_free_coherent(struct device *hwdev, size_t size, | |
39 | void *vaddr, dma_addr_t dma_handle); | |
40 | ||
41 | extern dma_addr_t | |
42 | swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir); | |
43 | ||
44 | extern void | |
45 | swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, | |
46 | size_t size, int dir); | |
47 | ||
48 | extern dma_addr_t | |
49 | swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size, | |
50 | int dir, struct dma_attrs *attrs); | |
51 | ||
52 | extern void | |
53 | swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr, | |
54 | size_t size, int dir, struct dma_attrs *attrs); | |
55 | ||
56 | extern int | |
57 | swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
58 | int direction); | |
59 | ||
60 | extern void | |
61 | swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
62 | int direction); | |
63 | ||
64 | extern int | |
65 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
66 | int dir, struct dma_attrs *attrs); | |
67 | ||
68 | extern void | |
69 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
70 | int nelems, int dir, struct dma_attrs *attrs); | |
71 | ||
72 | extern void | |
73 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
74 | size_t size, int dir); | |
75 | ||
76 | extern void | |
77 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
78 | int nelems, int dir); | |
79 | ||
80 | extern void | |
81 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
82 | size_t size, int dir); | |
83 | ||
84 | extern void | |
85 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
86 | int nelems, int dir); | |
87 | ||
88 | extern void | |
89 | swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
90 | unsigned long offset, size_t size, int dir); | |
91 | ||
92 | extern void | |
93 | swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
94 | unsigned long offset, size_t size, | |
95 | int dir); | |
96 | ||
97 | extern int | |
98 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); | |
99 | ||
100 | extern int | |
101 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
102 | ||
103 | #endif /* __LINUX_SWIOTLB_H */ |