forked from Minki/linux
48e1fd5a81
Use asm-generic/dma-mapping-common.h to handle all DMA mapping operations and establish a default get_dma_ops() that forwards all operations to the existing code. Augment dev_archdata to carry a pointer to the struct dma_map_ops, allowing DMA operations to be overridden on a per device basis. Currently this is never filled in, so the default dma_map_ops are used. A follow-on patch sets this for Octeon PCI devices. Also initialize the dma_debug system as it is now used if it is configured. Includes fixes by Kevin Cernekee <cernekee@gmail.com>. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Patchwork: http://patchwork.linux-mips.org/patch/1637/ Patchwork: http://patchwork.linux-mips.org/patch/1678/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
#ifndef _ASM_DMA_MAPPING_H
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#define _ASM_DMA_MAPPING_H
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#include <asm/scatterlist.h>
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#include <asm/cache.h>
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#include <asm-generic/dma-coherent.h>
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#include <dma-coherence.h>
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extern struct dma_map_ops *mips_dma_map_ops;
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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if (dev && dev->archdata.dma_ops)
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return dev->archdata.dma_ops;
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else
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return mips_dma_map_ops;
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}
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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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{
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if (!dev->dma_mask)
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return 0;
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return addr + size <= *dev->dma_mask;
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}
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static inline void dma_mark_clean(void *addr, size_t size) {}
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#include <asm-generic/dma-mapping-common.h>
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static inline int dma_supported(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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return ops->dma_supported(dev, mask);
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}
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static inline int dma_mapping_error(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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return ops->mapping_error(dev, mask);
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}
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static inline int
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dma_set_mask(struct device *dev, u64 mask)
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{
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if(!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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*dev->dma_mask = mask;
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return 0;
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}
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extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction direction);
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static inline void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp)
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{
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void *ret;
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struct dma_map_ops *ops = get_dma_ops(dev);
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ret = ops->alloc_coherent(dev, size, dma_handle, gfp);
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debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
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return ret;
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}
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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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ops->free_coherent(dev, size, vaddr, dma_handle);
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debug_dma_free_coherent(dev, size, vaddr, dma_handle);
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}
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void *dma_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag);
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void dma_free_noncoherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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#endif /* _ASM_DMA_MAPPING_H */
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