1 #ifndef _ASM_IA64_DMA_MAPPING_H
2 #define _ASM_IA64_DMA_MAPPING_H
5 * Copyright (C) 2003-2004 Hewlett-Packard Co
6 * David Mosberger-Tang <davidm@hpl.hp.com>
8 #include <asm/machvec.h>
9 #include <linux/scatterlist.h>
10 #include <asm/swiotlb.h>
12 extern struct dma_map_ops *dma_ops;
13 extern struct ia64_machine_vector ia64_mv;
14 extern void set_iommu_machvec(void);
16 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
17 enum dma_data_direction);
18 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
19 enum dma_data_direction);
21 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
22 dma_addr_t *daddr, gfp_t gfp)
24 struct dma_map_ops *ops = platform_dma_get_ops(dev);
25 return ops->alloc_coherent(dev, size, daddr, gfp | GFP_DMA);
28 static inline void dma_free_coherent(struct device *dev, size_t size,
29 void *caddr, dma_addr_t daddr)
31 struct dma_map_ops *ops = platform_dma_get_ops(dev);
32 ops->free_coherent(dev, size, caddr, daddr);
35 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
36 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
38 static inline dma_addr_t dma_map_single_attrs(struct device *dev,
39 void *caddr, size_t size,
40 enum dma_data_direction dir,
41 struct dma_attrs *attrs)
43 struct dma_map_ops *ops = platform_dma_get_ops(dev);
44 return ops->map_page(dev, virt_to_page(caddr),
45 (unsigned long)caddr & ~PAGE_MASK, size,
49 static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t daddr,
51 enum dma_data_direction dir,
52 struct dma_attrs *attrs)
54 struct dma_map_ops *ops = platform_dma_get_ops(dev);
55 ops->unmap_page(dev, daddr, size, dir, attrs);
58 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
59 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
61 static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
62 int nents, enum dma_data_direction dir,
63 struct dma_attrs *attrs)
65 struct dma_map_ops *ops = platform_dma_get_ops(dev);
66 return ops->map_sg(dev, sgl, nents, dir, attrs);
69 static inline void dma_unmap_sg_attrs(struct device *dev,
70 struct scatterlist *sgl, int nents,
71 enum dma_data_direction dir,
72 struct dma_attrs *attrs)
74 struct dma_map_ops *ops = platform_dma_get_ops(dev);
75 ops->unmap_sg(dev, sgl, nents, dir, attrs);
78 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
79 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
81 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t daddr,
83 enum dma_data_direction dir)
85 struct dma_map_ops *ops = platform_dma_get_ops(dev);
86 ops->sync_single_for_cpu(dev, daddr, size, dir);
89 static inline void dma_sync_sg_for_cpu(struct device *dev,
90 struct scatterlist *sgl,
91 int nents, enum dma_data_direction dir)
93 struct dma_map_ops *ops = platform_dma_get_ops(dev);
94 ops->sync_sg_for_cpu(dev, sgl, nents, dir);
97 static inline void dma_sync_single_for_device(struct device *dev,
100 enum dma_data_direction dir)
102 struct dma_map_ops *ops = platform_dma_get_ops(dev);
103 ops->sync_single_for_device(dev, daddr, size, dir);
106 static inline void dma_sync_sg_for_device(struct device *dev,
107 struct scatterlist *sgl,
109 enum dma_data_direction dir)
111 struct dma_map_ops *ops = platform_dma_get_ops(dev);
112 ops->sync_sg_for_device(dev, sgl, nents, dir);
115 static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
117 struct dma_map_ops *ops = platform_dma_get_ops(dev);
118 return ops->mapping_error(dev, daddr);
121 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
122 size_t offset, size_t size,
123 enum dma_data_direction dir)
125 struct dma_map_ops *ops = platform_dma_get_ops(dev);
126 return ops->map_page(dev, page, offset, size, dir, NULL);
129 static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
130 size_t size, enum dma_data_direction dir)
132 dma_unmap_single(dev, addr, size, dir);
136 * Rest of this file is part of the "Advanced DMA API". Use at your own risk.
137 * See Documentation/DMA-API.txt for details.
140 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir) \
141 dma_sync_single_for_cpu(dev, dma_handle, size, dir)
142 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir) \
143 dma_sync_single_for_device(dev, dma_handle, size, dir)
145 static inline int dma_supported(struct device *dev, u64 mask)
147 struct dma_map_ops *ops = platform_dma_get_ops(dev);
148 return ops->dma_supported(dev, mask);
152 dma_set_mask (struct device *dev, u64 mask)
154 if (!dev->dma_mask || !dma_supported(dev, mask))
156 *dev->dma_mask = mask;
160 extern int dma_get_cache_alignment(void);
163 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
164 enum dma_data_direction dir)
167 * IA-64 is cache-coherent, so this is mostly a no-op. However, we do need to
168 * ensure that dma_cache_sync() enforces order, hence the mb().
173 #define dma_is_consistent(d, h) (1) /* all we do is coherent memory... */
175 #endif /* _ASM_IA64_DMA_MAPPING_H */