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ea8c64ace8
phys_to_dma, dma_to_phys and dma_capable are helpers published by architecture code for use of swiotlb and xen-swiotlb only. Drivers are not supposed to use these directly, but use the DMA API instead. Move these to a new asm/dma-direct.h helper, included by a linux/dma-direct.h wrapper that provides the default linear mapping unless the architecture wants to override it. In the MIPS case the existing dma-coherent.h is reused for now as untangling it will take a bit of work. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Robin Murphy <robin.murphy@arm.com>
27 lines
638 B
C
27 lines
638 B
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2003 - 2005 Tensilica Inc.
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* Copyright (C) 2015 Cadence Design Systems Inc.
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*/
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#ifndef _XTENSA_DMA_MAPPING_H
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#define _XTENSA_DMA_MAPPING_H
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#include <asm/cache.h>
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#include <asm/io.h>
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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extern const struct dma_map_ops xtensa_dma_map_ops;
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static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
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{
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return &xtensa_dma_map_ops;
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}
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#endif /* _XTENSA_DMA_MAPPING_H */
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