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(struct device *hwdev,
35 extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
38 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
39 dma_addr_t *dma_handle, gfp_t flags);
42 swiotlb_free_coherent(struct device *hwdev, size_t size,
43 void *vaddr, dma_addr_t dma_handle);
45 extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
46 unsigned long offset, size_t size,
47 enum dma_data_direction dir,
48 struct dma_attrs *attrs);
49 extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
50 size_t size, enum dma_data_direction dir,
51 struct dma_attrs *attrs);
54 swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
58 swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
62 swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
63 enum dma_data_direction dir, struct dma_attrs *attrs);
66 swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
67 int nelems, enum dma_data_direction dir,
68 struct dma_attrs *attrs);
71 swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
72 size_t size, enum dma_data_direction dir);
75 swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
76 int nelems, enum dma_data_direction dir);
79 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
80 size_t size, enum dma_data_direction dir);
83 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
84 int nelems, enum dma_data_direction dir);
87 swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
88 unsigned long offset, size_t size,
89 enum dma_data_direction dir);
92 swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
93 unsigned long offset, size_t size,
94 enum dma_data_direction dir);
97 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
100 swiotlb_dma_supported(struct device *hwdev, u64 mask);
102 #endif /* __LINUX_SWIOTLB_H */