Merge branch 'mini2440-dev-unlikely' into mini2440-dev
[linux-2.6/mini2440.git] / include / linux / swiotlb.h
blob73b1f1cec423e8905db463c32a6fb8d96cf9fa0f
1 #ifndef __LINUX_SWIOTLB_H
2 #define __LINUX_SWIOTLB_H
4 #include <linux/types.h>
6 struct device;
7 struct dma_attrs;
8 struct scatterlist;
11 * Maximum allowable number of contiguous slabs to map,
12 * must be a power of 2. What is the appropriate value ?
13 * The complexity of {map,unmap}_single is linearly dependent on this value.
15 #define IO_TLB_SEGSIZE 128
18 * log of the size of each IO TLB slab. The number of slabs is command line
19 * controllable.
21 #define IO_TLB_SHIFT 11
23 extern void
24 swiotlb_init(void);
26 extern void
27 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
28 dma_addr_t *dma_handle, gfp_t flags);
30 extern void
31 swiotlb_free_coherent(struct device *hwdev, size_t size,
32 void *vaddr, dma_addr_t dma_handle);
34 extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
35 unsigned long offset, size_t size,
36 enum dma_data_direction dir,
37 struct dma_attrs *attrs);
38 extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
39 size_t size, enum dma_data_direction dir,
40 struct dma_attrs *attrs);
42 extern int
43 swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
44 int direction);
46 extern void
47 swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
48 int direction);
50 extern int
51 swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
52 enum dma_data_direction dir, struct dma_attrs *attrs);
54 extern void
55 swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
56 int nelems, enum dma_data_direction dir,
57 struct dma_attrs *attrs);
59 extern void
60 swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
61 size_t size, enum dma_data_direction dir);
63 extern void
64 swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
65 int nelems, enum dma_data_direction dir);
67 extern void
68 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
69 size_t size, enum dma_data_direction dir);
71 extern void
72 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
73 int nelems, enum dma_data_direction dir);
75 extern void
76 swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
77 unsigned long offset, size_t size,
78 enum dma_data_direction dir);
80 extern void
81 swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
82 unsigned long offset, size_t size,
83 enum dma_data_direction dir);
85 extern int
86 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
88 extern int
89 swiotlb_dma_supported(struct device *hwdev, u64 mask);
91 #endif /* __LINUX_SWIOTLB_H */