1 #ifndef __LINUX_SWIOTLB_XEN_H 2 #define __LINUX_SWIOTLB_XEN_H 3 4 #include <linux/swiotlb.h> 5 6 extern int xen_swiotlb_init(int verbose, bool early); 7 8 extern void 9 *xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, 10 dma_addr_t *dma_handle, gfp_t flags, 11 struct dma_attrs *attrs); 12 13 extern void 14 xen_swiotlb_free_coherent(struct device *hwdev, size_t size, 15 void *vaddr, dma_addr_t dma_handle, 16 struct dma_attrs *attrs); 17 18 extern dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, 19 unsigned long offset, size_t size, 20 enum dma_data_direction dir, 21 struct dma_attrs *attrs); 22 23 extern void xen_swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, 24 size_t size, enum dma_data_direction dir, 25 struct dma_attrs *attrs); 26 extern int 27 xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 28 int nelems, enum dma_data_direction dir, 29 struct dma_attrs *attrs); 30 31 extern void 32 xen_swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 33 int nelems, enum dma_data_direction dir, 34 struct dma_attrs *attrs); 35 36 extern void 37 xen_swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 38 size_t size, enum dma_data_direction dir); 39 40 extern void 41 xen_swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, 42 int nelems, enum dma_data_direction dir); 43 44 extern void 45 xen_swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 46 size_t size, enum dma_data_direction dir); 47 48 extern void 49 xen_swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 50 int nelems, enum dma_data_direction dir); 51 52 extern int 53 xen_swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 54 55 extern int 56 xen_swiotlb_dma_supported(struct device *hwdev, u64 mask); 57 58 #endif /* __LINUX_SWIOTLB_XEN_H */ 59