1 #ifndef _ASM_IA64_DMA_MAPPING_H 2 #define _ASM_IA64_DMA_MAPPING_H 3 4 /* 5 * Copyright (C) 2003-2004 Hewlett-Packard Co 6 * David Mosberger-Tang <davidm@hpl.hp.com> 7 */ 8 #include <asm/machvec.h> 9 #include <linux/scatterlist.h> 10 #include <asm/swiotlb.h> 11 #include <linux/dma-debug.h> 12 13 #define ARCH_HAS_DMA_GET_REQUIRED_MASK 14 15 #define DMA_ERROR_CODE 0 16 17 extern struct dma_map_ops *dma_ops; 18 extern struct ia64_machine_vector ia64_mv; 19 extern void set_iommu_machvec(void); 20 21 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t, 22 enum dma_data_direction); 23 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int, 24 enum dma_data_direction); 25 26 #define get_dma_ops(dev) platform_dma_get_ops(dev) 27 28 #include <asm-generic/dma-mapping-common.h> 29 30 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) 31 { 32 if (!dev->dma_mask) 33 return 0; 34 35 return addr + size - 1 <= *dev->dma_mask; 36 } 37 38 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) 39 { 40 return paddr; 41 } 42 43 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) 44 { 45 return daddr; 46 } 47 48 static inline void 49 dma_cache_sync (struct device *dev, void *vaddr, size_t size, 50 enum dma_data_direction dir) 51 { 52 /* 53 * IA-64 is cache-coherent, so this is mostly a no-op. However, we do need to 54 * ensure that dma_cache_sync() enforces order, hence the mb(). 55 */ 56 mb(); 57 } 58 59 #endif /* _ASM_IA64_DMA_MAPPING_H */ 60