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- #ifndef __LINUX_SWIOTLB_H
- #define __LINUX_SWIOTLB_H
- #include <linux/types.h>
- struct device;
- struct dma_attrs;
- struct scatterlist;
- /*
- * Maximum allowable number of contiguous slabs to map,
- * must be a power of 2. What is the appropriate value ?
- * The complexity of {map,unmap}_single is linearly dependent on this value.
- */
- #define IO_TLB_SEGSIZE 128
- /*
- * log of the size of each IO TLB slab. The number of slabs is command line
- * controllable.
- */
- #define IO_TLB_SHIFT 11
- extern void
- swiotlb_init(void);
- extern void
- *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
- dma_addr_t *dma_handle, gfp_t flags);
- extern void
- swiotlb_free_coherent(struct device *hwdev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
- extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- struct dma_attrs *attrs);
- extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs);
- extern int
- swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
- int direction);
- extern void
- swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
- int direction);
- extern int
- swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir, struct dma_attrs *attrs);
- extern void
- swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
- int nelems, enum dma_data_direction dir,
- struct dma_attrs *attrs);
- extern void
- swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir);
- extern void
- swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
- int nelems, enum dma_data_direction dir);
- extern void
- swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir);
- extern void
- swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
- int nelems, enum dma_data_direction dir);
- extern void
- swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
- unsigned long offset, size_t size,
- enum dma_data_direction dir);
- extern void
- swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
- unsigned long offset, size_t size,
- enum dma_data_direction dir);
- extern int
- swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
- extern int
- swiotlb_dma_supported(struct device *hwdev, u64 mask);
- #endif /* __LINUX_SWIOTLB_H */
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