![Al Viro](/assets/img/avatar_default.png)
- added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
152 lines
3.4 KiB
C
152 lines
3.4 KiB
C
/*
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* Copyright (C) 2004 IBM Corporation
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*
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* Implements the generic device dma API for ppc64. Handles
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* the pci and vio busses
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*/
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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/* Include the busses we support */
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#include <linux/pci.h>
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#include <asm/vio.h>
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#include <asm/scatterlist.h>
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#include <asm/bug.h>
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static struct dma_mapping_ops *get_dma_ops(struct device *dev)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return &pci_dma_ops;
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#endif
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#ifdef CONFIG_IBMVIO
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if (dev->bus == &vio_bus_type)
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return &vio_dma_ops;
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#endif
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return NULL;
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}
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int dma_supported(struct device *dev, u64 mask)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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return dma_ops->dma_supported(dev, mask);
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BUG();
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return 0;
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}
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EXPORT_SYMBOL(dma_supported);
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int dma_set_mask(struct device *dev, u64 dma_mask)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
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#endif
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#ifdef CONFIG_IBMVIO
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if (dev->bus == &vio_bus_type)
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return -EIO;
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#endif /* CONFIG_IBMVIO */
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BUG();
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return 0;
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}
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EXPORT_SYMBOL(dma_set_mask);
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void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
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BUG();
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return NULL;
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}
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EXPORT_SYMBOL(dma_alloc_coherent);
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void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
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else
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BUG();
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}
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EXPORT_SYMBOL(dma_free_coherent);
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dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, size_t size,
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enum dma_data_direction direction)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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return dma_ops->map_single(dev, cpu_addr, size, direction);
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BUG();
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return (dma_addr_t)0;
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}
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EXPORT_SYMBOL(dma_map_single);
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void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction direction)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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dma_ops->unmap_single(dev, dma_addr, size, direction);
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else
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BUG();
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}
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EXPORT_SYMBOL(dma_unmap_single);
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dma_addr_t dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size,
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enum dma_data_direction direction)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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return dma_ops->map_single(dev,
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(page_address(page) + offset), size, direction);
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BUG();
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return (dma_addr_t)0;
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}
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EXPORT_SYMBOL(dma_map_page);
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void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
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enum dma_data_direction direction)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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dma_ops->unmap_single(dev, dma_address, size, direction);
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else
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BUG();
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}
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EXPORT_SYMBOL(dma_unmap_page);
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int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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return dma_ops->map_sg(dev, sg, nents, direction);
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BUG();
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return 0;
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}
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EXPORT_SYMBOL(dma_map_sg);
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void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
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enum dma_data_direction direction)
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{
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struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops)
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dma_ops->unmap_sg(dev, sg, nhwentries, direction);
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else
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BUG();
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}
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EXPORT_SYMBOL(dma_unmap_sg);
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