1 #ifndef _ASM_METAG_DMA_MAPPING_H
2 #define _ASM_METAG_DMA_MAPPING_H
8 #include <linux/scatterlist.h>
11 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
12 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
14 void *dma_alloc_coherent(struct device *dev, size_t size,
15 dma_addr_t *dma_handle, gfp_t flag);
17 void dma_free_coherent(struct device *dev, size_t size,
18 void *vaddr, dma_addr_t dma_handle);
20 void dma_sync_for_device(void *vaddr, size_t size, int dma_direction);
21 void dma_sync_for_cpu(void *vaddr, size_t size, int dma_direction);
23 int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
24 void *cpu_addr, dma_addr_t dma_addr, size_t size);
26 int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
27 void *cpu_addr, dma_addr_t dma_addr, size_t size);
29 static inline dma_addr_t
30 dma_map_single(struct device *dev, void *ptr, size_t size,
31 enum dma_data_direction direction)
33 BUG_ON(!valid_dma_direction(direction));
35 dma_sync_for_device(ptr, size, direction);
36 return virt_to_phys(ptr);
40 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
41 enum dma_data_direction direction)
43 BUG_ON(!valid_dma_direction(direction));
44 dma_sync_for_cpu(phys_to_virt(dma_addr), size, direction);
48 dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
49 enum dma_data_direction direction)
51 struct scatterlist *sg;
54 BUG_ON(!valid_dma_direction(direction));
55 WARN_ON(nents == 0 || sglist[0].length == 0);
57 for_each_sg(sglist, sg, nents, i) {
60 sg->dma_address = sg_phys(sg);
61 dma_sync_for_device(sg_virt(sg), sg->length, direction);
67 static inline dma_addr_t
68 dma_map_page(struct device *dev, struct page *page, unsigned long offset,
69 size_t size, enum dma_data_direction direction)
71 BUG_ON(!valid_dma_direction(direction));
72 dma_sync_for_device((void *)(page_to_phys(page) + offset), size,
74 return page_to_phys(page) + offset;
78 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
79 enum dma_data_direction direction)
81 BUG_ON(!valid_dma_direction(direction));
82 dma_sync_for_cpu(phys_to_virt(dma_address), size, direction);
87 dma_unmap_sg(struct device *dev, struct scatterlist *sglist, int nhwentries,
88 enum dma_data_direction direction)
90 struct scatterlist *sg;
93 BUG_ON(!valid_dma_direction(direction));
94 WARN_ON(nhwentries == 0 || sglist[0].length == 0);
96 for_each_sg(sglist, sg, nhwentries, i) {
99 sg->dma_address = sg_phys(sg);
100 dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
105 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
106 enum dma_data_direction direction)
108 dma_sync_for_cpu(phys_to_virt(dma_handle), size, direction);
112 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
113 size_t size, enum dma_data_direction direction)
115 dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
119 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
120 unsigned long offset, size_t size,
121 enum dma_data_direction direction)
123 dma_sync_for_cpu(phys_to_virt(dma_handle)+offset, size,
128 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
129 unsigned long offset, size_t size,
130 enum dma_data_direction direction)
132 dma_sync_for_device(phys_to_virt(dma_handle)+offset, size,
137 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
138 enum dma_data_direction direction)
141 for (i = 0; i < nelems; i++, sg++)
142 dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
146 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
147 enum dma_data_direction direction)
150 for (i = 0; i < nelems; i++, sg++)
151 dma_sync_for_device(sg_virt(sg), sg->length, direction);
155 dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
160 #define dma_supported(dev, mask) (1)
163 dma_set_mask(struct device *dev, u64 mask)
165 if (!dev->dma_mask || !dma_supported(dev, mask))
168 *dev->dma_mask = mask;
174 * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
175 * do any flushing here.
178 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
179 enum dma_data_direction direction)
183 /* drivers/base/dma-mapping.c */
184 extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
185 void *cpu_addr, dma_addr_t dma_addr,
188 #define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)