mirror of https://gitee.com/openkylin/linux.git
97 lines
2.3 KiB
C
97 lines
2.3 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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#ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
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#include <dma-coherence.h>
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#endif
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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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#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
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static inline void *dma_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp,
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struct dma_attrs *attrs)
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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(dev, size, dma_handle, gfp, attrs);
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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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#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
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static inline void dma_free_attrs(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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ops->free(dev, size, vaddr, dma_handle, attrs);
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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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