160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/*
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* Copyright 2004-2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef _BLACKFIN_DMA_MAPPING_H
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#define _BLACKFIN_DMA_MAPPING_H
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#include <asm/cacheflush.h>
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struct scatterlist;
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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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void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle);
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/*
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* Now for the API extensions over the pci_ one
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*/
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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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#define dma_supported(d, m) (1)
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#define dma_get_cache_alignment() (32)
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#define dma_is_consistent(d, h) (1)
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static inline int
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dma_set_mask(struct device *dev, u64 dma_mask)
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{
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if (!dev->dma_mask || !dma_supported(dev, dma_mask))
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return -EIO;
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*dev->dma_mask = dma_mask;
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return 0;
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}
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static inline int
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dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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return 0;
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}
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extern void
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__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
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static inline void
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__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
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{
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switch (dir) {
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case DMA_NONE:
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BUG();
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case DMA_TO_DEVICE: /* writeback only */
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flush_dcache_range(addr, addr + size);
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break;
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case DMA_FROM_DEVICE: /* invalidate only */
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case DMA_BIDIRECTIONAL: /* flush and invalidate */
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/* Blackfin has no dedicated invalidate (it includes a flush) */
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invalidate_dcache_range(addr, addr + size);
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break;
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}
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}
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static inline void
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_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
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{
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if (__builtin_constant_p(dir))
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__dma_sync_inline(addr, size, dir);
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else
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__dma_sync(addr, size, dir);
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}
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static inline dma_addr_t
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dma_map_single(struct device *dev, void *ptr, size_t size,
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enum dma_data_direction dir)
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{
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_dma_sync((dma_addr_t)ptr, size, dir);
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return (dma_addr_t) ptr;
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}
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static inline dma_addr_t
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dma_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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{
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return dma_map_single(dev, page_address(page) + offset, size, dir);
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}
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static inline void
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dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction dir)
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{
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BUG_ON(!valid_dma_direction(dir));
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}
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static inline void
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dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction dir)
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{
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dma_unmap_single(dev, dma_addr, size, dir);
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}
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extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction dir);
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static inline void
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dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nhwentries, enum dma_data_direction dir)
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{
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BUG_ON(!valid_dma_direction(dir));
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}
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static inline void
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dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
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unsigned long offset, size_t size,
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enum dma_data_direction dir)
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{
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BUG_ON(!valid_dma_direction(dir));
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}
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static inline void
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dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
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unsigned long offset, size_t size,
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enum dma_data_direction dir)
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{
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_dma_sync(handle + offset, size, dir);
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}
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static inline void
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dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
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enum dma_data_direction dir)
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{
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dma_sync_single_range_for_cpu(dev, handle, 0, size, dir);
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}
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static inline void
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dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size,
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enum dma_data_direction dir)
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{
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dma_sync_single_range_for_device(dev, handle, 0, size, dir);
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}
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static inline void
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dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction dir)
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{
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BUG_ON(!valid_dma_direction(dir));
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}
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extern void
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dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir);
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static inline void
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dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir)
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{
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_dma_sync((dma_addr_t)vaddr, size, dir);
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}
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#endif /* _BLACKFIN_DMA_MAPPING_H */
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