path: root/include/asm-x86_64/swiotlb.h

#ifndef _ASM_SWIOTLB_H
#define _ASM_SWTIOLB_H 1

#include <linux/config.h>

/* SWIOTLB interface */

extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr, size_t size,
				      int dir);
extern void swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
				  size_t size, int dir);
extern void swiotlb_sync_single_for_cpu(struct device *hwdev,
					 dma_addr_t dev_addr,
					 size_t size, int dir);
extern void swiotlb_sync_single_for_device(struct device *hwdev,
					    dma_addr_t dev_addr,
					    size_t size, int dir);
extern void swiotlb_sync_sg_for_cpu(struct device *hwdev,
				     struct scatterlist *sg, int nelems,
				     int dir);
extern void swiotlb_sync_sg_for_device(struct device *hwdev,
					struct scatterlist *sg, int nelems,
					int dir);
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_dma_mapping_error(dma_addr_t dma_addr);
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);

#ifdef CONFIG_SWIOTLB
extern int swiotlb;
#else
#define swiotlb 0
#endif

#endif