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 extern const struct dma_map_ops *dma_ops; 16 extern struct ia64_machine_vector ia64_mv; 17 extern void set_iommu_machvec(void); 18 19 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t, 20 enum dma_data_direction); 21 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int, 22 enum dma_data_direction); 23 24 static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) 25 { 26 return platform_dma_get_ops(NULL); 27 } 28 29 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) 30 { 31 if (!dev->dma_mask) 32 return 0; 33 34 return addr + size - 1 <= *dev->dma_mask; 35 } 36 37 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) 38 { 39 return paddr; 40 } 41 42 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) 43 { 44 return daddr; 45 } 46 47 static inline void 48 dma_cache_sync (struct device *dev, void *vaddr, size_t size, 49 enum dma_data_direction dir) 50 { 51 /* 52 * IA-64 is cache-coherent, so this is mostly a no-op. However, we do need to 53 * ensure that dma_cache_sync() enforces order, hence the mb(). 54 */ 55 mb(); 56 } 57 58 #endif /* _ASM_IA64_DMA_MAPPING_H */ 59