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gerrit-public.fairphone.software / kernel / msm-4.19 / 0443fa003fa199f41bfbed3012f314d02c5b1f24 / . / include / linux / swiotlb.h
blob: 183f37c8a5e164ad5864ac433dd69093bac5bad7 [file] [log] [blame]
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]1#ifndef __LINUX_SWIOTLB_H
2#define __LINUX_SWIOTLB_H
3
Thierry Reding38674442015-07-01 14:17:58 +0200[diff] [blame]4#include <linux/dma-direction.h>
5#include <linux/init.h>
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]6#include <linux/types.h>
7
8struct device;
Thierry Reding38674442015-07-01 14:17:58 +0200[diff] [blame]9struct page;
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]10struct scatterlist;
11
FUJITA Tomonori69594502009-11-14 20:46:38 +0900[diff] [blame]12extern int swiotlb_force;
13
Ian Campbell0016fde2008-12-16 12:17:27 -0800[diff] [blame]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
Ian Campbell0016fde2008-12-16 12:17:27 -0800[diff] [blame]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
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]27extern void swiotlb_init(int verbose);
Yinghai Luac2cbab2013-01-24 12:20:16 -0800[diff] [blame]28int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
Konrad Rzeszutek Wilkf21ffe92011-08-11 16:50:56 -0400[diff] [blame]29extern unsigned long swiotlb_nr_tbl(void);
Yinghai Luc729de82013-04-15 22:23:45 -0700[diff] [blame]30unsigned long swiotlb_size_or_default(void);
Konrad Rzeszutek Wilk74838b72012-07-27 20:55:27 -0400[diff] [blame]31extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]32
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]33/*
34 * Enumeration for sync targets
35 */
36enum dma_sync_target {
37 SYNC_FOR_CPU = 0,
38 SYNC_FOR_DEVICE = 1,
39};
Alexander Duycke05ed4d2012-10-15 10:19:39 -0700[diff] [blame]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
44extern 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,
Alexander Duyck0443fa02016-11-02 07:13:02 -0400[diff] [blame^]47 enum dma_data_direction dir,
48 unsigned long attrs);
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]49
Alexander Duyck61ca08c2012-10-15 10:19:44 -0700[diff] [blame]50extern void swiotlb_tbl_unmap_single(struct device *hwdev,
51 phys_addr_t tlb_addr,
Alexander Duyck0443fa02016-11-02 07:13:02 -0400[diff] [blame^]52 size_t size, enum dma_data_direction dir,
53 unsigned long attrs);
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]54
Alexander Duyckfbfda892012-10-15 10:19:49 -0700[diff] [blame]55extern void swiotlb_tbl_sync_single(struct device *hwdev,
56 phys_addr_t tlb_addr,
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]57 size_t size, enum dma_data_direction dir,
58 enum dma_sync_target target);
59
60/* Accessory functions. */
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]61extern void
62*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
63 dma_addr_t *dma_handle, gfp_t flags);
64
65extern void
66swiotlb_free_coherent(struct device *hwdev, size_t size,
67 void *vaddr, dma_addr_t dma_handle);
68
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]69extern 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,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700[diff] [blame]72 unsigned long attrs);
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]73extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
74 size_t size, enum dma_data_direction dir,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700[diff] [blame]75 unsigned long attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]76
77extern int
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]78swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700[diff] [blame]79 enum dma_data_direction dir,
80 unsigned long attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]81
82extern void
83swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]84 int nelems, enum dma_data_direction dir,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700[diff] [blame]85 unsigned long attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]86
87extern void
88swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]89 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]90
91extern void
92swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]93 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]94
95extern void
96swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]97 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]98
99extern void
100swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]101 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]102
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]103extern int
104swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
105
106extern int
107swiotlb_dma_supported(struct device *hwdev, u64 mask);
108
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]109#ifdef CONFIG_SWIOTLB
110extern void __init swiotlb_free(void);
111#else
112static inline void swiotlb_free(void) { }
113#endif
114
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]115extern void swiotlb_print_info(void);
Akinobu Mita9c5a3622014-06-04 16:06:50 -0700[diff] [blame]116extern int is_swiotlb_buffer(phys_addr_t paddr);
117
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]118#endif /* __LINUX_SWIOTLB_H */