#ifndef _ALPHA_DMA_MAPPING_H#define _ALPHA_DMA_MAPPING_H  #ifdef CONFIG_PCI #include <linux/pci.h> #define dma_map_single(dev, va, size, dir)		\		pci_map_single(alpha_gendev_to_pci(dev), va, size, dir)#define dma_unmap_single(dev, addr, size, dir)		\		pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir)#define dma_alloc_coherent(dev, size, addr, gfp)	\		pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr)#define dma_free_coherent(dev, size, va, addr)		\		pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr)#define dma_map_page(dev, page, off, size, dir)		\		pci_map_page(alpha_gendev_to_pci(dev), page, off, size, dir)#define dma_unmap_page(dev, addr, size, dir)		\		pci_unmap_page(alpha_gendev_to_pci(dev), addr, size, dir)#define dma_map_sg(dev, sg, nents, dir)			\		pci_map_sg(alpha_gendev_to_pci(dev), sg, nents, dir)#define dma_unmap_sg(dev, sg, nents, dir)		\		pci_unmap_sg(alpha_gendev_to_pci(dev), sg, nents, dir)#define dma_supported(dev, mask)			\		pci_dma_supported(alpha_gendev_to_pci(dev), mask)#define dma_mapping_error(addr)				\		pci_dma_mapping_error(addr) #else	/* no PCI - no IOMMU. */ struct scatterlist;void *dma_alloc_coherent(struct device *dev, size_t size,			 dma_addr_t *dma_handle, gfp_t gfp);int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,	       enum dma_data_direction direction); #define dma_free_coherent(dev, size, va, addr)		\		free_pages((unsigned long)va, get_order(size))#define dma_supported(dev, mask)		(mask < 0x00ffffffUL ? 0 : 1)#define dma_map_single(dev, va, size, dir)	virt_to_phys(va)#define dma_map_page(dev, page, off, size, dir)	(page_to_pa(page) + off) #define dma_unmap_single(dev, addr, size, dir)	do { } while (0)#define dma_unmap_page(dev, addr, size, dir)	do { } while (0)#define dma_unmap_sg(dev, sg, nents, dir)	do { } while (0) #define dma_mapping_error(addr)  (0) #endif	/* !CONFIG_PCI */ #define dma_alloc_noncoherent(d, s, h, f)	dma_alloc_coherent(d, s, h, f)#define dma_free_noncoherent(d, s, v, h)	dma_free_coherent(d, s, v, h)#define dma_is_consistent(dev)			(1) int dma_set_mask(struct device *dev, u64 mask); #define dma_sync_single_for_cpu(dev, addr, size, dir)	  do { } while (0)#define dma_sync_single_for_device(dev, addr, size, dir)  do { } while (0)#define dma_sync_single_range(dev, addr, off, size, dir)  do { } while (0)#define dma_sync_sg_for_cpu(dev, sg, nents, dir)	  do { } while (0)#define dma_sync_sg_for_device(dev, sg, nents, dir)	  do { } while (0)#define dma_cache_sync(va, size, dir)			  do { } while (0) #define dma_get_cache_alignment()			  L1_CACHE_BYTES #endif	/* _ALPHA_DMA_MAPPING_H */