1 #ifndef __LINUX_SWIOTLB_H
2 #define __LINUX_SWIOTLB_H
4 #include <linux/types.h>
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
19 * log of the size of each IO TLB slab. The number of slabs is command line
22 #define IO_TLB_SHIFT 11
27 extern void *swiotlb_alloc_boot(size_t bytes
, unsigned long nslabs
);
28 extern void *swiotlb_alloc(unsigned order
, unsigned long nslabs
);
30 extern dma_addr_t
swiotlb_phys_to_bus(struct device
*hwdev
,
32 extern phys_addr_t
swiotlb_bus_to_phys(dma_addr_t address
);
34 extern int swiotlb_arch_range_needs_mapping(void *ptr
, size_t size
);
37 *swiotlb_alloc_coherent(struct device
*hwdev
, size_t size
,
38 dma_addr_t
*dma_handle
, gfp_t flags
);
41 swiotlb_free_coherent(struct device
*hwdev
, size_t size
,
42 void *vaddr
, dma_addr_t dma_handle
);
45 swiotlb_map_single(struct device
*hwdev
, void *ptr
, size_t size
, int dir
);
48 swiotlb_unmap_single(struct device
*hwdev
, dma_addr_t dev_addr
,
49 size_t size
, int dir
);
52 swiotlb_map_single_attrs(struct device
*hwdev
, void *ptr
, size_t size
,
53 int dir
, struct dma_attrs
*attrs
);
56 swiotlb_unmap_single_attrs(struct device
*hwdev
, dma_addr_t dev_addr
,
57 size_t size
, int dir
, struct dma_attrs
*attrs
);
60 swiotlb_map_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
64 swiotlb_unmap_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
68 swiotlb_map_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
, int nelems
,
69 int dir
, struct dma_attrs
*attrs
);
72 swiotlb_unmap_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
,
73 int nelems
, int dir
, struct dma_attrs
*attrs
);
76 swiotlb_sync_single_for_cpu(struct device
*hwdev
, dma_addr_t dev_addr
,
77 size_t size
, int dir
);
80 swiotlb_sync_sg_for_cpu(struct device
*hwdev
, struct scatterlist
*sg
,
84 swiotlb_sync_single_for_device(struct device
*hwdev
, dma_addr_t dev_addr
,
85 size_t size
, int dir
);
88 swiotlb_sync_sg_for_device(struct device
*hwdev
, struct scatterlist
*sg
,
92 swiotlb_sync_single_range_for_cpu(struct device
*hwdev
, dma_addr_t dev_addr
,
93 unsigned long offset
, size_t size
, int dir
);
96 swiotlb_sync_single_range_for_device(struct device
*hwdev
, dma_addr_t dev_addr
,
97 unsigned long offset
, size_t size
,
101 swiotlb_dma_mapping_error(struct device
*hwdev
, dma_addr_t dma_addr
);
104 swiotlb_dma_supported(struct device
*hwdev
, u64 mask
);
106 #endif /* __LINUX_SWIOTLB_H */
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