1 /* Copyright (C) 2002 by James.Bottomley@HansenPartnership.com
3 * Implements the generic device dma API via the existing pci_ one
4 * for unconverted architectures
7 #ifndef _ASM_GENERIC_DMA_MAPPING_H
8 #define _ASM_GENERIC_DMA_MAPPING_H
10 #include <linux/config.h>
14 /* we implement the API below in terms of the existing PCI one,
16 #include <linux/pci.h>
17 /* need struct page definitions */
21 dma_supported(struct device *dev, u64 mask)
23 BUG_ON(dev->bus != &pci_bus_type);
25 return pci_dma_supported(to_pci_dev(dev), mask);
29 dma_set_mask(struct device *dev, u64 dma_mask)
31 BUG_ON(dev->bus != &pci_bus_type);
33 return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
37 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
38 unsigned int __nocast flag)
40 BUG_ON(dev->bus != &pci_bus_type);
42 return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
46 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
47 dma_addr_t dma_handle)
49 BUG_ON(dev->bus != &pci_bus_type);
51 pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
54 static inline dma_addr_t
55 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
56 enum dma_data_direction direction)
58 BUG_ON(dev->bus != &pci_bus_type);
60 return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
64 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
65 enum dma_data_direction direction)
67 BUG_ON(dev->bus != &pci_bus_type);
69 pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
72 static inline dma_addr_t
73 dma_map_page(struct device *dev, struct page *page,
74 unsigned long offset, size_t size,
75 enum dma_data_direction direction)
77 BUG_ON(dev->bus != &pci_bus_type);
79 return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
83 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
84 enum dma_data_direction direction)
86 BUG_ON(dev->bus != &pci_bus_type);
88 pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
92 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
93 enum dma_data_direction direction)
95 BUG_ON(dev->bus != &pci_bus_type);
97 return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
101 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
102 enum dma_data_direction direction)
104 BUG_ON(dev->bus != &pci_bus_type);
106 pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
110 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
111 enum dma_data_direction direction)
113 BUG_ON(dev->bus != &pci_bus_type);
115 pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
116 size, (int)direction);
120 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
121 enum dma_data_direction direction)
123 BUG_ON(dev->bus != &pci_bus_type);
125 pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
126 size, (int)direction);
130 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
131 enum dma_data_direction direction)
133 BUG_ON(dev->bus != &pci_bus_type);
135 pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
139 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
140 enum dma_data_direction direction)
142 BUG_ON(dev->bus != &pci_bus_type);
144 pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
148 dma_mapping_error(dma_addr_t dma_addr)
150 return pci_dma_mapping_error(dma_addr);
157 dma_supported(struct device *dev, u64 mask)
163 dma_set_mask(struct device *dev, u64 dma_mask)
170 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
171 unsigned int __nocast flag)
178 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
179 dma_addr_t dma_handle)
184 static inline dma_addr_t
185 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
186 enum dma_data_direction direction)
193 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
194 enum dma_data_direction direction)
199 static inline dma_addr_t
200 dma_map_page(struct device *dev, struct page *page,
201 unsigned long offset, size_t size,
202 enum dma_data_direction direction)
209 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
210 enum dma_data_direction direction)
216 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
217 enum dma_data_direction direction)
224 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
225 enum dma_data_direction direction)
231 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
232 enum dma_data_direction direction)
238 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
239 enum dma_data_direction direction)
245 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
246 enum dma_data_direction direction)
252 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
253 enum dma_data_direction direction)
259 dma_error(dma_addr_t dma_addr)
266 /* Now for the API extensions over the pci_ one */
268 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
269 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
270 #define dma_is_consistent(d) (1)
273 dma_get_cache_alignment(void)
275 /* no easy way to get cache size on all processors, so return
276 * the maximum possible, to be safe */
277 return (1 << L1_CACHE_SHIFT_MAX);
281 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
282 unsigned long offset, size_t size,
283 enum dma_data_direction direction)
285 /* just sync everything, that's all the pci API can do */
286 dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction);
290 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
291 unsigned long offset, size_t size,
292 enum dma_data_direction direction)
294 /* just sync everything, that's all the pci API can do */
295 dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
299 dma_cache_sync(void *vaddr, size_t size,
300 enum dma_data_direction direction)
302 /* could define this in terms of the dma_cache ... operations,
303 * but if you get this on a platform, you should convert the platform
304 * to using the generic device DMA API */