1 #ifndef __ASM_SH_DMA_MAPPING_H
2 #define __ASM_SH_DMA_MAPPING_H
5 #include <asm/scatterlist.h>
9 extern void *consistent_alloc(struct pci_dev *hwdev, size_t size,
10 dma_addr_t *dma_handle);
11 extern void consistent_free(struct pci_dev *hwdev, size_t size,
12 void *vaddr, dma_addr_t dma_handle);
14 #define dma_supported(dev, mask) (1)
16 static inline int dma_set_mask(struct device *dev, u64 mask)
18 if (!dev->dma_mask || !dma_supported(dev, mask))
21 *dev->dma_mask = mask;
26 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
27 dma_addr_t *dma_handle, gfp_t flag)
29 return consistent_alloc(NULL, size, dma_handle);
32 static inline void dma_free_coherent(struct device *dev, size_t size,
33 void *vaddr, dma_addr_t dma_handle)
35 consistent_free(NULL, size, vaddr, dma_handle);
38 static inline void dma_cache_sync(void *vaddr, size_t size,
39 enum dma_data_direction dir)
41 dma_cache_wback_inv((unsigned long)vaddr, size);
44 static inline dma_addr_t dma_map_single(struct device *dev,
45 void *ptr, size_t size,
46 enum dma_data_direction dir)
48 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
49 if (dev->bus == &pci_bus_type)
50 return virt_to_bus(ptr);
52 dma_cache_sync(ptr, size, dir);
54 return virt_to_bus(ptr);
57 #define dma_unmap_single(dev, addr, size, dir) do { } while (0)
59 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
60 int nents, enum dma_data_direction dir)
64 for (i = 0; i < nents; i++) {
65 #if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
66 dma_cache_sync(page_address(sg[i].page) + sg[i].offset,
69 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
75 #define dma_unmap_sg(dev, sg, nents, dir) do { } while (0)
77 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
78 unsigned long offset, size_t size,
79 enum dma_data_direction dir)
81 return dma_map_single(dev, page_address(page) + offset, size, dir);
84 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
85 size_t size, enum dma_data_direction dir)
87 dma_unmap_single(dev, dma_address, size, dir);
90 static inline void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
91 size_t size, enum dma_data_direction dir)
93 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
94 if (dev->bus == &pci_bus_type)
97 dma_cache_sync(bus_to_virt(dma_handle), size, dir);
100 static inline void dma_sync_single_range(struct device *dev,
101 dma_addr_t dma_handle,
102 unsigned long offset, size_t size,
103 enum dma_data_direction dir)
105 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
106 if (dev->bus == &pci_bus_type)
109 dma_cache_sync(bus_to_virt(dma_handle) + offset, size, dir);
112 static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg,
113 int nelems, enum dma_data_direction dir)
117 for (i = 0; i < nelems; i++) {
118 #if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
119 dma_cache_sync(page_address(sg[i].page) + sg[i].offset,
122 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
126 static inline void dma_sync_single_for_cpu(struct device *dev,
127 dma_addr_t dma_handle, size_t size,
128 enum dma_data_direction dir)
130 dma_sync_single(dev, dma_handle, size, dir);
133 static inline void dma_sync_single_for_device(struct device *dev,
134 dma_addr_t dma_handle, size_t size,
135 enum dma_data_direction dir)
137 dma_sync_single(dev, dma_handle, size, dir);
140 static inline void dma_sync_sg_for_cpu(struct device *dev,
141 struct scatterlist *sg, int nelems,
142 enum dma_data_direction dir)
144 dma_sync_sg(dev, sg, nelems, dir);
147 static inline void dma_sync_sg_for_device(struct device *dev,
148 struct scatterlist *sg, int nelems,
149 enum dma_data_direction dir)
151 dma_sync_sg(dev, sg, nelems, dir);
154 static inline int dma_get_cache_alignment(void)
157 * Each processor family will define its own L1_CACHE_SHIFT,
158 * L1_CACHE_BYTES wraps to this, so this is always safe.
160 return L1_CACHE_BYTES;
163 static inline int dma_mapping_error(dma_addr_t dma_addr)
165 return dma_addr == 0;
168 #endif /* __ASM_SH_DMA_MAPPING_H */