forked from Minki/linux
4565f0170d
dma_get_cache_alignment returns the minimum DMA alignment. Architectures defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN). So we can unify dma_get_cache_alignment implementations. Note that some architectures implement dma_get_cache_alignment wrongly. dma_get_cache_alignment() should return the minimum DMA alignment. So fully-coherent architectures should return 1. This patch also fixes this issue. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
#ifndef __ASM_SH_DMA_MAPPING_H
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#define __ASM_SH_DMA_MAPPING_H
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extern struct dma_map_ops *dma_ops;
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extern void no_iommu_init(void);
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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return dma_ops;
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}
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#include <asm-generic/dma-coherent.h>
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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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if (ops->dma_supported)
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return ops->dma_supported(dev, mask);
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return 1;
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}
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static inline int dma_set_mask(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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if (!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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if (ops->set_dma_mask)
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return ops->set_dma_mask(dev, mask);
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*dev->dma_mask = mask;
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return 0;
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}
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void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir);
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#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
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#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
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#ifdef CONFIG_DMA_COHERENT
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#define dma_is_consistent(d, h) (1)
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#else
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#define dma_is_consistent(d, h) (0)
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#endif
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (ops->mapping_error)
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return ops->mapping_error(dev, dma_addr);
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return dma_addr == 0;
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}
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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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struct dma_map_ops *ops = get_dma_ops(dev);
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void *memory;
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if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
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return memory;
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if (!ops->alloc_coherent)
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return NULL;
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memory = ops->alloc_coherent(dev, size, dma_handle, gfp);
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debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
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return memory;
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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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if (dma_release_from_coherent(dev, get_order(size), vaddr))
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return;
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debug_dma_free_coherent(dev, size, vaddr, dma_handle);
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if (ops->free_coherent)
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ops->free_coherent(dev, size, vaddr, dma_handle);
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}
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/* arch/sh/mm/consistent.c */
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extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_addr, gfp_t flag);
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extern void dma_generic_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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#endif /* __ASM_SH_DMA_MAPPING_H */
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