1 #ifndef _X8664_DMA_MAPPING_H
2 #define _X8664_DMA_MAPPING_H 1
5 * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
10 #include <asm/scatterlist.h>
12 #include <asm/swiotlb.h>
14 struct dma_mapping_ops
{
15 int (*mapping_error
)(dma_addr_t dma_addr
);
16 void* (*alloc_coherent
)(struct device
*dev
, size_t size
,
17 dma_addr_t
*dma_handle
, gfp_t gfp
);
18 void (*free_coherent
)(struct device
*dev
, size_t size
,
19 void *vaddr
, dma_addr_t dma_handle
);
20 dma_addr_t (*map_single
)(struct device
*hwdev
, void *ptr
,
21 size_t size
, int direction
);
22 /* like map_single, but doesn't check the device mask */
23 dma_addr_t (*map_simple
)(struct device
*hwdev
, char *ptr
,
24 size_t size
, int direction
);
25 void (*unmap_single
)(struct device
*dev
, dma_addr_t addr
,
26 size_t size
, int direction
);
27 void (*sync_single_for_cpu
)(struct device
*hwdev
,
28 dma_addr_t dma_handle
, size_t size
,
30 void (*sync_single_for_device
)(struct device
*hwdev
,
31 dma_addr_t dma_handle
, size_t size
,
33 void (*sync_single_range_for_cpu
)(struct device
*hwdev
,
34 dma_addr_t dma_handle
, unsigned long offset
,
35 size_t size
, int direction
);
36 void (*sync_single_range_for_device
)(struct device
*hwdev
,
37 dma_addr_t dma_handle
, unsigned long offset
,
38 size_t size
, int direction
);
39 void (*sync_sg_for_cpu
)(struct device
*hwdev
,
40 struct scatterlist
*sg
, int nelems
,
42 void (*sync_sg_for_device
)(struct device
*hwdev
,
43 struct scatterlist
*sg
, int nelems
,
45 int (*map_sg
)(struct device
*hwdev
, struct scatterlist
*sg
,
46 int nents
, int direction
);
47 void (*unmap_sg
)(struct device
*hwdev
,
48 struct scatterlist
*sg
, int nents
,
50 int (*dma_supported
)(struct device
*hwdev
, u64 mask
);
54 extern dma_addr_t bad_dma_address
;
55 extern struct dma_mapping_ops
* dma_ops
;
56 extern int iommu_merge
;
58 static inline int dma_mapping_error(dma_addr_t dma_addr
)
60 if (dma_ops
->mapping_error
)
61 return dma_ops
->mapping_error(dma_addr
);
63 return (dma_addr
== bad_dma_address
);
66 extern void *dma_alloc_coherent(struct device
*dev
, size_t size
,
67 dma_addr_t
*dma_handle
, gfp_t gfp
);
68 extern void dma_free_coherent(struct device
*dev
, size_t size
, void *vaddr
,
69 dma_addr_t dma_handle
);
71 static inline dma_addr_t
72 dma_map_single(struct device
*hwdev
, void *ptr
, size_t size
,
75 BUG_ON(!valid_dma_direction(direction
));
76 return dma_ops
->map_single(hwdev
, ptr
, size
, direction
);
80 dma_unmap_single(struct device
*dev
, dma_addr_t addr
,size_t size
,
83 BUG_ON(!valid_dma_direction(direction
));
84 dma_ops
->unmap_single(dev
, addr
, size
, direction
);
87 #define dma_map_page(dev,page,offset,size,dir) \
88 dma_map_single((dev), page_address(page)+(offset), (size), (dir))
90 #define dma_unmap_page dma_unmap_single
93 dma_sync_single_for_cpu(struct device
*hwdev
, dma_addr_t dma_handle
,
94 size_t size
, int direction
)
96 BUG_ON(!valid_dma_direction(direction
));
97 if (dma_ops
->sync_single_for_cpu
)
98 dma_ops
->sync_single_for_cpu(hwdev
, dma_handle
, size
,
100 flush_write_buffers();
104 dma_sync_single_for_device(struct device
*hwdev
, dma_addr_t dma_handle
,
105 size_t size
, int direction
)
107 BUG_ON(!valid_dma_direction(direction
));
108 if (dma_ops
->sync_single_for_device
)
109 dma_ops
->sync_single_for_device(hwdev
, dma_handle
, size
,
111 flush_write_buffers();
115 dma_sync_single_range_for_cpu(struct device
*hwdev
, dma_addr_t dma_handle
,
116 unsigned long offset
, size_t size
, int direction
)
118 BUG_ON(!valid_dma_direction(direction
));
119 if (dma_ops
->sync_single_range_for_cpu
) {
120 dma_ops
->sync_single_range_for_cpu(hwdev
, dma_handle
, offset
, size
, direction
);
123 flush_write_buffers();
127 dma_sync_single_range_for_device(struct device
*hwdev
, dma_addr_t dma_handle
,
128 unsigned long offset
, size_t size
, int direction
)
130 BUG_ON(!valid_dma_direction(direction
));
131 if (dma_ops
->sync_single_range_for_device
)
132 dma_ops
->sync_single_range_for_device(hwdev
, dma_handle
,
133 offset
, size
, direction
);
135 flush_write_buffers();
139 dma_sync_sg_for_cpu(struct device
*hwdev
, struct scatterlist
*sg
,
140 int nelems
, int direction
)
142 BUG_ON(!valid_dma_direction(direction
));
143 if (dma_ops
->sync_sg_for_cpu
)
144 dma_ops
->sync_sg_for_cpu(hwdev
, sg
, nelems
, direction
);
145 flush_write_buffers();
149 dma_sync_sg_for_device(struct device
*hwdev
, struct scatterlist
*sg
,
150 int nelems
, int direction
)
152 BUG_ON(!valid_dma_direction(direction
));
153 if (dma_ops
->sync_sg_for_device
) {
154 dma_ops
->sync_sg_for_device(hwdev
, sg
, nelems
, direction
);
157 flush_write_buffers();
161 dma_map_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
, int direction
)
163 BUG_ON(!valid_dma_direction(direction
));
164 return dma_ops
->map_sg(hwdev
, sg
, nents
, direction
);
168 dma_unmap_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
171 BUG_ON(!valid_dma_direction(direction
));
172 dma_ops
->unmap_sg(hwdev
, sg
, nents
, direction
);
175 extern int dma_supported(struct device
*hwdev
, u64 mask
);
177 /* same for gart, swiotlb, and nommu */
178 static inline int dma_get_cache_alignment(void)
180 return boot_cpu_data
.x86_clflush_size
;
183 #define dma_is_consistent(d, h) 1
185 extern int dma_set_mask(struct device
*dev
, u64 mask
);
188 dma_cache_sync(void *vaddr
, size_t size
, enum dma_data_direction dir
)
190 flush_write_buffers();
193 extern struct device fallback_dev
;
194 extern int panic_on_overflow
;
196 #endif /* _X8664_DMA_MAPPING_H */