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
23 extern void swiotlb_init(int verbose);
26 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
27 dma_addr_t *dma_handle, gfp_t flags);
30 swiotlb_free_coherent(struct device *hwdev, size_t size,
31 void *vaddr, dma_addr_t dma_handle);
33 extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
34 unsigned long offset, size_t size,
35 enum dma_data_direction dir,
36 struct dma_attrs *attrs);
37 extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
38 size_t size, enum dma_data_direction dir,
39 struct dma_attrs *attrs);
42 swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
46 swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
50 swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
51 enum dma_data_direction dir, struct dma_attrs *attrs);
54 swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
55 int nelems, enum dma_data_direction dir,
56 struct dma_attrs *attrs);
59 swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
60 size_t size, enum dma_data_direction dir);
63 swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
64 int nelems, enum dma_data_direction dir);
67 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
68 size_t size, enum dma_data_direction dir);
71 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
72 int nelems, enum dma_data_direction dir);
75 swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
76 unsigned long offset, size_t size,
77 enum dma_data_direction dir);
80 swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
81 unsigned long offset, size_t size,
82 enum dma_data_direction dir);
85 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
88 swiotlb_dma_supported(struct device *hwdev, u64 mask);
91 extern void __init swiotlb_free(void);
93 static inline void swiotlb_free(void) { }
96 extern void swiotlb_print_info(void);
97 #endif /* __LINUX_SWIOTLB_H */