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