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
dma_capable(struct device * dev,dma_addr_t addr,size_t size)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
phys_to_dma(struct device * dev,phys_addr_t paddr)38 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
39 {
40 return paddr;
41 }
42
dma_to_phys(struct device * dev,dma_addr_t daddr)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
dma_cache_sync(struct device * dev,void * vaddr,size_t size,enum dma_data_direction dir)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