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