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* See Documentation/DMA-API-HOWTO.txt and
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* Documentation/DMA-API.txt for documentation.
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* This file is written with the intention of eventually moving over
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* to largely using asm-generic/dma-mapping-common.h in its place.
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#include <linux/dma-debug.h>
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#include <asm-generic/dma-coherent.h>
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#include <linux/kmemcheck.h>
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#include <linux/dma-mapping.h>
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#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
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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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void *or1k_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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void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle);
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dma_addr_t or1k_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 dir,
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struct dma_attrs *attrs);
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void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir,
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struct dma_attrs *attrs);
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int or1k_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir,
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struct dma_attrs *attrs);
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void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir,
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struct dma_attrs *attrs);
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void or1k_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction dir);
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void or1k_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction dir);
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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 flag)
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extern struct dma_map_ops or1k_dma_map_ops;
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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return &or1k_dma_map_ops;
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#include <asm-generic/dma-mapping-common.h>
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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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struct dma_map_ops *ops = get_dma_ops(dev);
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memory = or1k_dma_alloc_coherent(dev, size, dma_handle, flag);
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memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
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debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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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 *cpu_addr, dma_addr_t dma_handle,
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struct dma_attrs *attrs)
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struct dma_map_ops *ops = get_dma_ops(dev);
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debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
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or1k_dma_free_coherent(dev, size, cpu_addr, dma_handle);
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static inline dma_addr_t dma_map_single(struct device *dev, void *ptr,
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enum dma_data_direction dir)
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kmemcheck_mark_initialized(ptr, size);
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BUG_ON(!valid_dma_direction(dir));
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addr = or1k_map_page(dev, virt_to_page(ptr),
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(unsigned long)ptr & ~PAGE_MASK, size,
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debug_dma_map_page(dev, virt_to_page(ptr),
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(unsigned long)ptr & ~PAGE_MASK, size,
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static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
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enum dma_data_direction dir)
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BUG_ON(!valid_dma_direction(dir));
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or1k_unmap_page(dev, addr, size, dir, NULL);
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debug_dma_unmap_page(dev, addr, size, dir, true);
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static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir)
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struct scatterlist *s;
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for_each_sg(sg, s, nents, i)
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kmemcheck_mark_initialized(sg_virt(s), s->length);
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BUG_ON(!valid_dma_direction(dir));
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ents = or1k_map_sg(dev, sg, nents, dir, NULL);
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debug_dma_map_sg(dev, sg, nents, ents, dir);
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static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir)
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BUG_ON(!valid_dma_direction(dir));
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debug_dma_unmap_sg(dev, sg, nents, dir);
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or1k_unmap_sg(dev, sg, nents, dir, NULL);
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static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
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size_t offset, size_t size,
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enum dma_data_direction dir)
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kmemcheck_mark_initialized(page_address(page) + offset, size);
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BUG_ON(!valid_dma_direction(dir));
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addr = or1k_map_page(dev, page, offset, size, dir, NULL);
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debug_dma_map_page(dev, page, offset, size, dir, addr, false);
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static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir)
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BUG_ON(!valid_dma_direction(dir));
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or1k_unmap_page(dev, addr, size, dir, NULL);
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debug_dma_unmap_page(dev, addr, size, dir, true);
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static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
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enum dma_data_direction dir)
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BUG_ON(!valid_dma_direction(dir));
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or1k_sync_single_for_cpu(dev, addr, size, dir);
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debug_dma_sync_single_for_cpu(dev, addr, size, dir);
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static inline void dma_sync_single_for_device(struct device *dev,
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dma_addr_t addr, size_t size,
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enum dma_data_direction dir)
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BUG_ON(!valid_dma_direction(dir));
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or1k_sync_single_for_device(dev, addr, size, dir);
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debug_dma_sync_single_for_device(dev, addr, size, dir);
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ops->free(dev, size, cpu_addr, dma_handle, attrs);
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static inline void *dma_alloc_noncoherent(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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dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
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return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
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static inline void dma_free_noncoherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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struct dma_attrs attrs;
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dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
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dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
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static inline int dma_supported(struct device *dev, u64 dma_mask)