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Joerg Roedel16489932008-10-15 22:01:03 -07001#ifndef __LINUX_SWIOTLB_H
2#define __LINUX_SWIOTLB_H
3
4#include <linux/types.h>
5
6struct device;
7struct dma_attrs;
8struct scatterlist;
9
FUJITA Tomonori69594502009-11-14 20:46:38 +090010extern int swiotlb_force;
11
Ian Campbell0016fde2008-12-16 12:17:27 -080012/*
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
Ian Campbell0016fde2008-12-16 12:17:27 -080019/*
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
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +090025extern void swiotlb_init(int verbose);
Yinghai Luac2cbab2013-01-24 12:20:16 -080026int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
Konrad Rzeszutek Wilkf21ffe92011-08-11 16:50:56 -040027extern unsigned long swiotlb_nr_tbl(void);
Yinghai Luc729de82013-04-15 22:23:45 -070028unsigned long swiotlb_size_or_default(void);
Konrad Rzeszutek Wilk74838b72012-07-27 20:55:27 -040029extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
Joerg Roedel16489932008-10-15 22:01:03 -070030
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -040031/*
32 * Enumeration for sync targets
33 */
34enum dma_sync_target {
35 SYNC_FOR_CPU = 0,
36 SYNC_FOR_DEVICE = 1,
37};
Alexander Duycke05ed4d2012-10-15 10:19:39 -070038
39/* define the last possible byte of physical address space as a mapping error */
40#define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0)
41
42extern 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);
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -040046
Alexander Duyck61ca08c2012-10-15 10:19:44 -070047extern void swiotlb_tbl_unmap_single(struct device *hwdev,
48 phys_addr_t tlb_addr,
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -040049 size_t size, enum dma_data_direction dir);
50
Alexander Duyckfbfda892012-10-15 10:19:49 -070051extern void swiotlb_tbl_sync_single(struct device *hwdev,
52 phys_addr_t tlb_addr,
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -040053 size_t size, enum dma_data_direction dir,
54 enum dma_sync_target target);
55
56/* Accessory functions. */
Joerg Roedel16489932008-10-15 22:01:03 -070057extern void
58*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
59 dma_addr_t *dma_handle, gfp_t flags);
60
61extern void
62swiotlb_free_coherent(struct device *hwdev, size_t size,
63 void *vaddr, dma_addr_t dma_handle);
64
FUJITA Tomonorif98eee82009-01-05 23:59:03 +090065extern 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);
69extern 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);
Joerg Roedel16489932008-10-15 22:01:03 -070072
73extern int
74swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -050075 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -070076
77extern void
78swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -050079 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -070080
81extern int
82swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +090083 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -070084
85extern void
86swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +090087 int nelems, enum dma_data_direction dir,
88 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -070089
90extern void
91swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +090092 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -070093
94extern void
95swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +090096 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -070097
98extern void
99swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900100 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700101
102extern void
103swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900104 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700105
Joerg Roedel16489932008-10-15 22:01:03 -0700106extern int
107swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
108
109extern int
110swiotlb_dma_supported(struct device *hwdev, u64 mask);
111
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900112#ifdef CONFIG_SWIOTLB
113extern void __init swiotlb_free(void);
114#else
115static inline void swiotlb_free(void) { }
116#endif
117
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900118extern void swiotlb_print_info(void);
Akinobu Mita9c5a3622014-06-04 16:06:50 -0700119extern int is_swiotlb_buffer(phys_addr_t paddr);
120
Joerg Roedel16489932008-10-15 22:01:03 -0700121#endif /* __LINUX_SWIOTLB_H */