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 */