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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); |
ac2cbab2 | 26 | int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); |
f21ffe9f | 27 | extern unsigned long swiotlb_nr_tbl(void); |
c729de8f | 28 | unsigned long swiotlb_size_or_default(void); |
74838b75 | 29 | extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); |
1648993f | 30 | |
d7ef1533 KRW |
31 | /* |
32 | * Enumeration for sync targets | |
33 | */ | |
34 | enum dma_sync_target { | |
35 | SYNC_FOR_CPU = 0, | |
36 | SYNC_FOR_DEVICE = 1, | |
37 | }; | |
e05ed4d1 AD |
38 | |
39 | /* define the last possible byte of physical address space as a mapping error */ | |
40 | #define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0) | |
41 | ||
42 | extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, | |
43 | dma_addr_t tbl_dma_addr, | |
44 | phys_addr_t phys, size_t size, | |
45 | enum dma_data_direction dir); | |
d7ef1533 | 46 | |
61ca08c3 AD |
47 | extern void swiotlb_tbl_unmap_single(struct device *hwdev, |
48 | phys_addr_t tlb_addr, | |
d7ef1533 KRW |
49 | size_t size, enum dma_data_direction dir); |
50 | ||
fbfda893 AD |
51 | extern void swiotlb_tbl_sync_single(struct device *hwdev, |
52 | phys_addr_t tlb_addr, | |
d7ef1533 KRW |
53 | size_t size, enum dma_data_direction dir, |
54 | enum dma_sync_target target); | |
55 | ||
56 | /* Accessory functions. */ | |
1648993f JR |
57 | extern void |
58 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, | |
59 | dma_addr_t *dma_handle, gfp_t flags); | |
60 | ||
61 | extern void | |
62 | swiotlb_free_coherent(struct device *hwdev, size_t size, | |
63 | void *vaddr, dma_addr_t dma_handle); | |
64 | ||
f98eee8e FT |
65 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
66 | unsigned long offset, size_t size, | |
67 | enum dma_data_direction dir, | |
68 | struct dma_attrs *attrs); | |
69 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, | |
70 | size_t size, enum dma_data_direction dir, | |
71 | struct dma_attrs *attrs); | |
1648993f JR |
72 | |
73 | extern int | |
74 | swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
22d48269 | 75 | enum dma_data_direction dir); |
1648993f JR |
76 | |
77 | extern void | |
78 | swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
22d48269 | 79 | enum dma_data_direction dir); |
1648993f JR |
80 | |
81 | extern int | |
82 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
160c1d8e | 83 | enum dma_data_direction dir, struct dma_attrs *attrs); |
1648993f JR |
84 | |
85 | extern void | |
86 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
160c1d8e FT |
87 | int nelems, enum dma_data_direction dir, |
88 | struct dma_attrs *attrs); | |
1648993f JR |
89 | |
90 | extern void | |
91 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 92 | size_t size, enum dma_data_direction dir); |
1648993f JR |
93 | |
94 | extern void | |
95 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 96 | int nelems, enum dma_data_direction dir); |
1648993f JR |
97 | |
98 | extern void | |
99 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 100 | size_t size, enum dma_data_direction dir); |
1648993f JR |
101 | |
102 | extern void | |
103 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 104 | int nelems, enum dma_data_direction dir); |
1648993f | 105 | |
1648993f JR |
106 | extern int |
107 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); | |
108 | ||
109 | extern int | |
110 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
111 | ||
5740afdb FT |
112 | #ifdef CONFIG_SWIOTLB |
113 | extern void __init swiotlb_free(void); | |
114 | #else | |
115 | static inline void swiotlb_free(void) { } | |
116 | #endif | |
117 | ||
ad32e8cb | 118 | extern void swiotlb_print_info(void); |
9c5a3621 AM |
119 | extern int is_swiotlb_buffer(phys_addr_t paddr); |
120 | ||
1648993f | 121 | #endif /* __LINUX_SWIOTLB_H */ |