63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
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#ifndef DMA_COHERENT_H
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#define DMA_COHERENT_H
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#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
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/*
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* These three functions are only for dma allocator.
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* Don't use them in device drivers.
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*/
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int dma_alloc_from_coherent_attr(struct device *dev, ssize_t size,
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dma_addr_t *dma_handle, void **ret,
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unsigned long attrs);
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int dma_release_from_coherent_attr(struct device *dev, size_t size, void *vaddr,
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unsigned long attrs, dma_addr_t dma_handle);
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#define dma_alloc_from_coherent(d, s, h, r) \
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dma_alloc_from_coherent_attr(d, s, h, r, 0)
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#define dma_release_from_coherent(d, s, v) \
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dma_release_from_coherent_attr(d, s, v, 0, 0)
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int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, size_t size, int *ret);
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/*
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* Standard interface
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*/
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#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
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struct dma_declare_info;
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struct dma_coherent_stats;
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extern int
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dma_declare_coherent_resizable_cma_memory(struct device *dev,
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struct dma_declare_info *dma_info);
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extern int
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dma_set_resizable_heap_floor_size(struct device *dev, size_t floor_size);
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int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
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dma_addr_t device_addr, size_t size, int flags);
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int _dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
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dma_addr_t device_addr, size_t size,
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unsigned long alloc_shift, int flags);
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unsigned long dma_get_coherent_memory_alloc_shift(struct device *dev);
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void dma_release_declared_memory(struct device *dev);
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bool dma_is_coherent_dev(struct device *dev);
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extern int
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dma_get_coherent_stats(struct device *dev,
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struct dma_coherent_stats *stats);
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#else
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#define dma_alloc_from_coherent_attr(dev, size, handle, ret, attr) (0)
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#define dma_release_from_coherent_attr(dev, size, vaddr, attr, dma_handle) (0)
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#define dma_alloc_from_coherent(dev, size, handle, ret) (0)
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#define dma_release_from_coherent(dev, order, vaddr) (0)
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#define dma_mmap_from_coherent(dev, vma, vaddr, order, ret) (0)
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#define dma_declare_coherent_resizable_cma_memory(dev, dma_info) (0)
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#define dma_is_coherent_dev(dev) (0)
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#define dma_get_coherent_stats(dev, dma_stats) (0)
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#endif
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#endif
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