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
18 * log of the size of each IO TLB slab. The number of slabs is command line
21 #define IO_TLB_SHIFT 11
26 extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
28 extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
31 extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
34 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
35 dma_addr_t *dma_handle, gfp_t flags);
38 swiotlb_free_coherent(struct device *hwdev, size_t size,
39 void *vaddr, dma_addr_t dma_handle);
41 extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
42 unsigned long offset, size_t size,
43 enum dma_data_direction dir,
44 struct dma_attrs *attrs);
45 extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
46 size_t size, enum dma_data_direction dir,
47 struct dma_attrs *attrs);
50 swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
54 swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
58 swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
59 enum dma_data_direction dir, struct dma_attrs *attrs);
62 swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
63 int nelems, enum dma_data_direction dir,
64 struct dma_attrs *attrs);
67 swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
68 size_t size, enum dma_data_direction dir);
71 swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
72 int nelems, enum dma_data_direction dir);
75 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
76 size_t size, enum dma_data_direction dir);
79 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
80 int nelems, enum dma_data_direction dir);
83 swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
84 unsigned long offset, size_t size,
85 enum dma_data_direction dir);
88 swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
89 unsigned long offset, size_t size,
90 enum dma_data_direction dir);
93 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
96 swiotlb_dma_supported(struct device *hwdev, u64 mask);
98 #endif /* __LINUX_SWIOTLB_H */