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);
26 extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
29 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
30 dma_addr_t *dma_handle, gfp_t flags);
33 swiotlb_free_coherent(struct device *hwdev, size_t size,
34 void *vaddr, dma_addr_t dma_handle);
36 extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
37 unsigned long offset, size_t size,
38 enum dma_data_direction dir,
39 struct dma_attrs *attrs);
40 extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
41 size_t size, enum dma_data_direction dir,
42 struct dma_attrs *attrs);
45 swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
49 swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
53 swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
54 enum dma_data_direction dir, struct dma_attrs *attrs);
57 swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
58 int nelems, enum dma_data_direction dir,
59 struct dma_attrs *attrs);
62 swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
63 size_t size, enum dma_data_direction dir);
66 swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
67 int nelems, enum dma_data_direction dir);
70 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
71 size_t size, enum dma_data_direction dir);
74 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
75 int nelems, enum dma_data_direction dir);
78 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
81 swiotlb_dma_supported(struct device *hwdev, u64 mask);
84 extern void __init swiotlb_free(void);
86 static inline void swiotlb_free(void) { }
89 extern void swiotlb_print_info(void);
90 #endif /* __LINUX_SWIOTLB_H */