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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1648993f JR |
2 | #ifndef __LINUX_SWIOTLB_H |
3 | #define __LINUX_SWIOTLB_H | |
4 | ||
38674442 TR |
5 | #include <linux/dma-direction.h> |
6 | #include <linux/init.h> | |
1648993f JR |
7 | #include <linux/types.h> |
8 | ||
9 | struct device; | |
38674442 | 10 | struct page; |
1648993f JR |
11 | struct scatterlist; |
12 | ||
ae7871be GU |
13 | enum swiotlb_force { |
14 | SWIOTLB_NORMAL, /* Default - depending on HW DMA mask etc. */ | |
15 | SWIOTLB_FORCE, /* swiotlb=force */ | |
fff5d992 | 16 | SWIOTLB_NO_FORCE, /* swiotlb=noforce */ |
ae7871be GU |
17 | }; |
18 | ||
19 | extern enum swiotlb_force swiotlb_force; | |
6959450e | 20 | |
0016fdee IC |
21 | /* |
22 | * Maximum allowable number of contiguous slabs to map, | |
23 | * must be a power of 2. What is the appropriate value ? | |
24 | * The complexity of {map,unmap}_single is linearly dependent on this value. | |
25 | */ | |
26 | #define IO_TLB_SEGSIZE 128 | |
27 | ||
0016fdee IC |
28 | /* |
29 | * log of the size of each IO TLB slab. The number of slabs is command line | |
30 | * controllable. | |
31 | */ | |
32 | #define IO_TLB_SHIFT 11 | |
33 | ||
ad32e8cb | 34 | extern void swiotlb_init(int verbose); |
ac2cbab2 | 35 | int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); |
f21ffe9f | 36 | extern unsigned long swiotlb_nr_tbl(void); |
c729de8f | 37 | unsigned long swiotlb_size_or_default(void); |
74838b75 | 38 | extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); |
c7753208 | 39 | extern void __init swiotlb_update_mem_attributes(void); |
1648993f | 40 | |
d7ef1533 KRW |
41 | /* |
42 | * Enumeration for sync targets | |
43 | */ | |
44 | enum dma_sync_target { | |
45 | SYNC_FOR_CPU = 0, | |
46 | SYNC_FOR_DEVICE = 1, | |
47 | }; | |
e05ed4d1 AD |
48 | |
49 | /* define the last possible byte of physical address space as a mapping error */ | |
50 | #define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0) | |
51 | ||
52 | extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, | |
53 | dma_addr_t tbl_dma_addr, | |
54 | phys_addr_t phys, size_t size, | |
0443fa00 AD |
55 | enum dma_data_direction dir, |
56 | unsigned long attrs); | |
d7ef1533 | 57 | |
61ca08c3 AD |
58 | extern void swiotlb_tbl_unmap_single(struct device *hwdev, |
59 | phys_addr_t tlb_addr, | |
0443fa00 AD |
60 | size_t size, enum dma_data_direction dir, |
61 | unsigned long attrs); | |
d7ef1533 | 62 | |
fbfda893 AD |
63 | extern void swiotlb_tbl_sync_single(struct device *hwdev, |
64 | phys_addr_t tlb_addr, | |
d7ef1533 KRW |
65 | size_t size, enum dma_data_direction dir, |
66 | enum dma_sync_target target); | |
67 | ||
68 | /* Accessory functions. */ | |
251533eb | 69 | |
f98eee8e FT |
70 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
71 | unsigned long offset, size_t size, | |
72 | enum dma_data_direction dir, | |
00085f1e | 73 | unsigned long attrs); |
f98eee8e FT |
74 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, |
75 | size_t size, enum dma_data_direction dir, | |
00085f1e | 76 | unsigned long attrs); |
1648993f | 77 | |
1648993f JR |
78 | extern int |
79 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, | |
00085f1e KK |
80 | enum dma_data_direction dir, |
81 | unsigned long attrs); | |
1648993f JR |
82 | |
83 | extern void | |
84 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, | |
160c1d8e | 85 | int nelems, enum dma_data_direction dir, |
00085f1e | 86 | unsigned long attrs); |
1648993f JR |
87 | |
88 | extern void | |
89 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 90 | size_t size, enum dma_data_direction dir); |
1648993f JR |
91 | |
92 | extern void | |
93 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 94 | int nelems, enum dma_data_direction dir); |
1648993f JR |
95 | |
96 | extern void | |
97 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, | |
160c1d8e | 98 | size_t size, enum dma_data_direction dir); |
1648993f JR |
99 | |
100 | extern void | |
101 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
160c1d8e | 102 | int nelems, enum dma_data_direction dir); |
1648993f | 103 | |
1648993f JR |
104 | extern int |
105 | swiotlb_dma_supported(struct device *hwdev, u64 mask); | |
106 | ||
5740afdb | 107 | #ifdef CONFIG_SWIOTLB |
7f2c8bbd | 108 | extern void __init swiotlb_exit(void); |
7453c549 | 109 | unsigned int swiotlb_max_segment(void); |
5740afdb | 110 | #else |
7f2c8bbd | 111 | static inline void swiotlb_exit(void) { } |
7453c549 | 112 | static inline unsigned int swiotlb_max_segment(void) { return 0; } |
5740afdb FT |
113 | #endif |
114 | ||
ad32e8cb | 115 | extern void swiotlb_print_info(void); |
7453c549 | 116 | extern void swiotlb_set_max_segment(unsigned int); |
9c5a3621 | 117 | |
251533eb CH |
118 | extern const struct dma_map_ops swiotlb_dma_ops; |
119 | ||
1648993f | 120 | #endif /* __LINUX_SWIOTLB_H */ |