1 #ifndef _ASM_DMA_MAPPING_H_
2 #define _ASM_DMA_MAPPING_H_
5 * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
9 #include <linux/scatterlist.h>
11 #include <asm/swiotlb.h>
13 extern dma_addr_t bad_dma_address;
15 struct dma_mapping_ops {
16 int (*mapping_error)(dma_addr_t dma_addr);
17 void* (*alloc_coherent)(struct device *dev, size_t size,
18 dma_addr_t *dma_handle, gfp_t gfp);
19 void (*free_coherent)(struct device *dev, size_t size,
20 void *vaddr, dma_addr_t dma_handle);
21 dma_addr_t (*map_single)(struct device *hwdev, phys_addr_t ptr,
22 size_t size, int direction);
23 /* like map_single, but doesn't check the device mask */
24 dma_addr_t (*map_simple)(struct device *hwdev, phys_addr_t ptr,
25 size_t size, int direction);
26 void (*unmap_single)(struct device *dev, dma_addr_t addr,
27 size_t size, int direction);
28 void (*sync_single_for_cpu)(struct device *hwdev,
29 dma_addr_t dma_handle, size_t size,
31 void (*sync_single_for_device)(struct device *hwdev,
32 dma_addr_t dma_handle, size_t size,
34 void (*sync_single_range_for_cpu)(struct device *hwdev,
35 dma_addr_t dma_handle, unsigned long offset,
36 size_t size, int direction);
37 void (*sync_single_range_for_device)(struct device *hwdev,
38 dma_addr_t dma_handle, unsigned long offset,
39 size_t size, int direction);
40 void (*sync_sg_for_cpu)(struct device *hwdev,
41 struct scatterlist *sg, int nelems,
43 void (*sync_sg_for_device)(struct device *hwdev,
44 struct scatterlist *sg, int nelems,
46 int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
47 int nents, int direction);
48 void (*unmap_sg)(struct device *hwdev,
49 struct scatterlist *sg, int nents,
51 int (*dma_supported)(struct device *hwdev, u64 mask);
55 extern const struct dma_mapping_ops *dma_ops;
57 static inline int dma_mapping_error(dma_addr_t dma_addr)
59 if (dma_ops->mapping_error)
60 return dma_ops->mapping_error(dma_addr);
62 return (dma_addr == bad_dma_address);
65 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
66 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
68 void *dma_alloc_coherent(struct device *dev, size_t size,
69 dma_addr_t *dma_handle, gfp_t flag);
71 void dma_free_coherent(struct device *dev, size_t size,
72 void *vaddr, dma_addr_t dma_handle);
75 extern int dma_supported(struct device *hwdev, u64 mask);
76 extern int dma_set_mask(struct device *dev, u64 mask);
79 # include "dma-mapping_32.h"
81 # include "dma-mapping_64.h"
84 static inline dma_addr_t
85 dma_map_single(struct device *hwdev, void *ptr, size_t size,
88 BUG_ON(!valid_dma_direction(direction));
89 return dma_ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
93 dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
96 BUG_ON(!valid_dma_direction(direction));
97 if (dma_ops->unmap_single)
98 dma_ops->unmap_single(dev, addr, size, direction);
102 dma_map_sg(struct device *hwdev, struct scatterlist *sg,
103 int nents, int direction)
105 BUG_ON(!valid_dma_direction(direction));
106 return dma_ops->map_sg(hwdev, sg, nents, direction);
110 dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
113 BUG_ON(!valid_dma_direction(direction));
114 if (dma_ops->unmap_sg)
115 dma_ops->unmap_sg(hwdev, sg, nents, direction);
119 dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
120 size_t size, int direction)
122 BUG_ON(!valid_dma_direction(direction));
123 if (dma_ops->sync_single_for_cpu)
124 dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
126 flush_write_buffers();
130 dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
131 size_t size, int direction)
133 BUG_ON(!valid_dma_direction(direction));
134 if (dma_ops->sync_single_for_device)
135 dma_ops->sync_single_for_device(hwdev, dma_handle, size,
137 flush_write_buffers();
141 dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
142 unsigned long offset, size_t size, int direction)
144 BUG_ON(!valid_dma_direction(direction));
145 if (dma_ops->sync_single_range_for_cpu)
146 dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
149 flush_write_buffers();
153 dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
154 unsigned long offset, size_t size,
157 BUG_ON(!valid_dma_direction(direction));
158 if (dma_ops->sync_single_range_for_device)
159 dma_ops->sync_single_range_for_device(hwdev, dma_handle,
160 offset, size, direction);
162 flush_write_buffers();
166 dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
167 int nelems, int direction)
169 BUG_ON(!valid_dma_direction(direction));
170 if (dma_ops->sync_sg_for_cpu)
171 dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
172 flush_write_buffers();
176 dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
177 int nelems, int direction)
179 BUG_ON(!valid_dma_direction(direction));
180 if (dma_ops->sync_sg_for_device)
181 dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);
183 flush_write_buffers();
186 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
187 size_t offset, size_t size,
190 BUG_ON(!valid_dma_direction(direction));
191 return dma_ops->map_single(dev, page_to_phys(page)+offset,
195 static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
196 size_t size, int direction)
198 dma_unmap_single(dev, addr, size, direction);
202 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
203 enum dma_data_direction dir)
205 flush_write_buffers();
209 # define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
211 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
212 dma_addr_t device_addr, size_t size, int flags);
215 dma_release_declared_memory(struct device *dev);
218 dma_mark_declared_memory_occupied(struct device *dev,
219 dma_addr_t device_addr, size_t size);
220 #endif /* CONFIG_X86_32 */