2 * Copyright (C) 2004 IBM Corporation
4 * Implements the generic device dma API for ppc64. Handles
5 * the pci and vio busses
8 #include <linux/device.h>
9 #include <linux/dma-mapping.h>
10 /* Include the busses we support */
11 #include <linux/pci.h>
13 #include <asm/scatterlist.h>
16 static struct dma_mapping_ops *get_dma_ops(struct device *dev)
19 if (dev->bus == &pci_bus_type)
23 if (dev->bus == &vio_bus_type)
29 int dma_supported(struct device *dev, u64 mask)
31 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
34 return dma_ops->dma_supported(dev, mask);
38 EXPORT_SYMBOL(dma_supported);
40 int dma_set_mask(struct device *dev, u64 dma_mask)
43 if (dev->bus == &pci_bus_type)
44 return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
47 if (dev->bus == &vio_bus_type)
49 #endif /* CONFIG_IBMVIO */
53 EXPORT_SYMBOL(dma_set_mask);
55 void *dma_alloc_coherent(struct device *dev, size_t size,
56 dma_addr_t *dma_handle, gfp_t flag)
58 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
61 return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
65 EXPORT_SYMBOL(dma_alloc_coherent);
67 void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
68 dma_addr_t dma_handle)
70 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
73 dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
77 EXPORT_SYMBOL(dma_free_coherent);
79 dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, size_t size,
80 enum dma_data_direction direction)
82 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
85 return dma_ops->map_single(dev, cpu_addr, size, direction);
89 EXPORT_SYMBOL(dma_map_single);
91 void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
92 enum dma_data_direction direction)
94 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
97 dma_ops->unmap_single(dev, dma_addr, size, direction);
101 EXPORT_SYMBOL(dma_unmap_single);
103 dma_addr_t dma_map_page(struct device *dev, struct page *page,
104 unsigned long offset, size_t size,
105 enum dma_data_direction direction)
107 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
110 return dma_ops->map_single(dev,
111 (page_address(page) + offset), size, direction);
113 return (dma_addr_t)0;
115 EXPORT_SYMBOL(dma_map_page);
117 void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
118 enum dma_data_direction direction)
120 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
123 dma_ops->unmap_single(dev, dma_address, size, direction);
127 EXPORT_SYMBOL(dma_unmap_page);
129 int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
130 enum dma_data_direction direction)
132 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
135 return dma_ops->map_sg(dev, sg, nents, direction);
139 EXPORT_SYMBOL(dma_map_sg);
141 void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
142 enum dma_data_direction direction)
144 struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
147 dma_ops->unmap_sg(dev, sg, nhwentries, direction);
151 EXPORT_SYMBOL(dma_unmap_sg);