1 #ifndef __LINUX_SWIOTLB_H
2 #define __LINUX_SWIOTLB_H
4 #include <linux/types.h>
10 extern int swiotlb_force;
13 * Maximum allowable number of contiguous slabs to map,
14 * must be a power of 2. What is the appropriate value ?
15 * The complexity of {map,unmap}_single is linearly dependent on this value.
17 #define IO_TLB_SEGSIZE 128
20 * log of the size of each IO TLB slab. The number of slabs is command line
23 #define IO_TLB_SHIFT 11
25 extern void swiotlb_init(int verbose);
28 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
29 dma_addr_t *dma_handle, gfp_t flags);
32 swiotlb_free_coherent(struct device *hwdev, size_t size,
33 void *vaddr, dma_addr_t dma_handle);
35 extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
36 unsigned long offset, size_t size,
37 enum dma_data_direction dir,
38 struct dma_attrs *attrs);
39 extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
40 size_t size, enum dma_data_direction dir,
41 struct dma_attrs *attrs);
44 swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
48 swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
52 swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
53 enum dma_data_direction dir, struct dma_attrs *attrs);
56 swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
57 int nelems, enum dma_data_direction dir,
58 struct dma_attrs *attrs);
61 swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
62 size_t size, enum dma_data_direction dir);
65 swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
66 int nelems, enum dma_data_direction dir);
69 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
70 size_t size, enum dma_data_direction dir);
73 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
74 int nelems, enum dma_data_direction dir);
77 swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
78 unsigned long offset, size_t size,
79 enum dma_data_direction dir);
82 swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
83 unsigned long offset, size_t size,
84 enum dma_data_direction dir);
87 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
90 swiotlb_dma_supported(struct device *hwdev, u64 mask);
93 extern void __init swiotlb_free(void);
95 static inline void swiotlb_free(void) { }
98 extern void swiotlb_print_info(void);
99 #endif /* __LINUX_SWIOTLB_H */