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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); |
f21ffe9f | 27 | extern unsigned long swiotlb_nr_tbl(void); |
1648993f | 28 | |
d7ef1533 KRW |
29 | /* |
30 | * Enumeration for sync targets | |
31 | */ | |
32 | enum dma_sync_target { | |
33 | SYNC_FOR_CPU = 0, | |
34 | SYNC_FOR_DEVICE = 1, | |
35 | }; | |
36 | extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr, | |
37 | phys_addr_t phys, size_t size, | |
38 | enum dma_data_direction dir); | |
39 | ||
40 | extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr, | |
41 | size_t size, enum dma_data_direction dir); | |
42 | ||
43 | extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr, | |
44 | size_t size, enum dma_data_direction dir, | |
45 | enum dma_sync_target target); | |
46 | ||
47 | /* Accessory functions. */ | |
48 | extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size, | |
49 | enum dma_data_direction dir); | |
50 | ||
1648993f JR |
51 | extern void |
52 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, | |
53 | dma_addr_t *dma_handle, gfp_t flags); | |
54 | ||
55 | extern void | |
56 | swiotlb_free_coherent(struct device *hwdev, size_t size, | |
57 | void *vaddr, dma_addr_t dma_handle); | |
58 | ||
f98eee8e FT |
59 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
60 | unsigned long offset, size_t size, | |
61 | enum dma_data_direction dir, | |
62 | struct dma_attrs *attrs); | |
63 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, | |
64 | size_t size, enum dma_data_direction dir, | |
65 | struct dma_attrs *attrs); | |
1648993f JR |
66 | |
67 | extern int | |
68 | swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
22d48269 | 69 | enum dma_data_direction dir); |
1648993f JR |
70 | |
71 | extern void | |
72 | swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
22d48269 | 73 | enum dma_data_direction dir); |
1648993f JR |
74 | |
75 | extern int | |
76 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
160c1d8e | 77 | enum dma_data_direction dir, struct dma_attrs *attrs); |
1648993f JR |
78 | |
79 | extern void | |
80 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
160c1d8e FT |
81 | int nelems, enum dma_data_direction dir, |
82 | struct dma_attrs *attrs); | |
1648993f JR |
83 | |
84 | extern void | |
85 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 86 | size_t size, enum dma_data_direction dir); |
1648993f JR |
87 | |
88 | extern void | |
89 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 90 | int nelems, enum dma_data_direction dir); |
1648993f JR |
91 | |
92 | extern void | |
93 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 94 | size_t size, enum dma_data_direction dir); |
1648993f JR |
95 | |
96 | extern void | |
97 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 98 | int nelems, enum dma_data_direction dir); |
1648993f | 99 | |
1648993f JR |
100 | extern int |
101 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); | |
102 | ||
103 | extern int | |
104 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
105 | ||
5740afdb FT |
106 | #ifdef CONFIG_SWIOTLB |
107 | extern void __init swiotlb_free(void); | |
108 | #else | |
109 | static inline void swiotlb_free(void) { } | |
110 | #endif | |
111 | ||
ad32e8cb | 112 | extern void swiotlb_print_info(void); |
1648993f | 113 | #endif /* __LINUX_SWIOTLB_H */ |