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1648993f JR |
1 | #ifndef __LINUX_SWIOTLB_H |
2 | #define __LINUX_SWIOTLB_H | |
3 | ||
38674442 TR |
4 | #include <linux/dma-direction.h> |
5 | #include <linux/init.h> | |
1648993f JR |
6 | #include <linux/types.h> |
7 | ||
8 | struct device; | |
38674442 | 9 | struct page; |
1648993f JR |
10 | struct scatterlist; |
11 | ||
ae7871be GU |
12 | enum swiotlb_force { |
13 | SWIOTLB_NORMAL, /* Default - depending on HW DMA mask etc. */ | |
14 | SWIOTLB_FORCE, /* swiotlb=force */ | |
fff5d992 | 15 | SWIOTLB_NO_FORCE, /* swiotlb=noforce */ |
ae7871be GU |
16 | }; |
17 | ||
18 | extern enum swiotlb_force swiotlb_force; | |
6959450e | 19 | |
0016fdee IC |
20 | /* |
21 | * Maximum allowable number of contiguous slabs to map, | |
22 | * must be a power of 2. What is the appropriate value ? | |
23 | * The complexity of {map,unmap}_single is linearly dependent on this value. | |
24 | */ | |
25 | #define IO_TLB_SEGSIZE 128 | |
26 | ||
0016fdee IC |
27 | /* |
28 | * log of the size of each IO TLB slab. The number of slabs is command line | |
29 | * controllable. | |
30 | */ | |
31 | #define IO_TLB_SHIFT 11 | |
32 | ||
ad32e8cb | 33 | extern void swiotlb_init(int verbose); |
ac2cbab2 | 34 | int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); |
f21ffe9f | 35 | extern unsigned long swiotlb_nr_tbl(void); |
c729de8f | 36 | unsigned long swiotlb_size_or_default(void); |
74838b75 | 37 | extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); |
1648993f | 38 | |
d7ef1533 KRW |
39 | /* |
40 | * Enumeration for sync targets | |
41 | */ | |
42 | enum dma_sync_target { | |
43 | SYNC_FOR_CPU = 0, | |
44 | SYNC_FOR_DEVICE = 1, | |
45 | }; | |
e05ed4d1 AD |
46 | |
47 | /* define the last possible byte of physical address space as a mapping error */ | |
48 | #define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0) | |
49 | ||
50 | extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, | |
51 | dma_addr_t tbl_dma_addr, | |
52 | phys_addr_t phys, size_t size, | |
0443fa00 AD |
53 | enum dma_data_direction dir, |
54 | unsigned long attrs); | |
d7ef1533 | 55 | |
61ca08c3 AD |
56 | extern void swiotlb_tbl_unmap_single(struct device *hwdev, |
57 | phys_addr_t tlb_addr, | |
0443fa00 AD |
58 | size_t size, enum dma_data_direction dir, |
59 | unsigned long attrs); | |
d7ef1533 | 60 | |
fbfda893 AD |
61 | extern void swiotlb_tbl_sync_single(struct device *hwdev, |
62 | phys_addr_t tlb_addr, | |
d7ef1533 KRW |
63 | size_t size, enum dma_data_direction dir, |
64 | enum dma_sync_target target); | |
65 | ||
66 | /* Accessory functions. */ | |
1648993f JR |
67 | extern void |
68 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, | |
69 | dma_addr_t *dma_handle, gfp_t flags); | |
70 | ||
71 | extern void | |
72 | swiotlb_free_coherent(struct device *hwdev, size_t size, | |
73 | void *vaddr, dma_addr_t dma_handle); | |
74 | ||
f98eee8e FT |
75 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
76 | unsigned long offset, size_t size, | |
77 | enum dma_data_direction dir, | |
00085f1e | 78 | unsigned long attrs); |
f98eee8e FT |
79 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, |
80 | size_t size, enum dma_data_direction dir, | |
00085f1e | 81 | unsigned long attrs); |
1648993f | 82 | |
1648993f JR |
83 | extern int |
84 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
00085f1e KK |
85 | enum dma_data_direction dir, |
86 | unsigned long attrs); | |
1648993f JR |
87 | |
88 | extern void | |
89 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
160c1d8e | 90 | int nelems, enum dma_data_direction dir, |
00085f1e | 91 | unsigned long attrs); |
1648993f JR |
92 | |
93 | extern void | |
94 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 95 | size_t size, enum dma_data_direction dir); |
1648993f JR |
96 | |
97 | extern void | |
98 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 99 | int nelems, enum dma_data_direction dir); |
1648993f JR |
100 | |
101 | extern void | |
102 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 103 | size_t size, enum dma_data_direction dir); |
1648993f JR |
104 | |
105 | extern void | |
106 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 107 | int nelems, enum dma_data_direction dir); |
1648993f | 108 | |
1648993f JR |
109 | extern int |
110 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); | |
111 | ||
112 | extern int | |
113 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
114 | ||
5740afdb FT |
115 | #ifdef CONFIG_SWIOTLB |
116 | extern void __init swiotlb_free(void); | |
7453c549 | 117 | unsigned int swiotlb_max_segment(void); |
5740afdb FT |
118 | #else |
119 | static inline void swiotlb_free(void) { } | |
7453c549 | 120 | static inline unsigned int swiotlb_max_segment(void) { return 0; } |
5740afdb FT |
121 | #endif |
122 | ||
ad32e8cb | 123 | extern void swiotlb_print_info(void); |
9c5a3621 | 124 | extern int is_swiotlb_buffer(phys_addr_t paddr); |
7453c549 | 125 | extern void swiotlb_set_max_segment(unsigned int); |
9c5a3621 | 126 | |
1648993f | 127 | #endif /* __LINUX_SWIOTLB_H */ |