mirror of https://gitee.com/openkylin/linux.git
94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
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/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_DMA_MAPPING_H
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#define _ASM_TILE_DMA_MAPPING_H
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/cache.h>
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#include <linux/io.h>
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/*
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* Note that on x86 and powerpc, there is a "struct dma_mapping_ops"
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* that is used for all the DMA operations. For now, we don't have an
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* equivalent on tile, because we only have a single way of doing DMA.
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* (Tilera bug 7994 to use dma_mapping_ops.)
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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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extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
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enum dma_data_direction);
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extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
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size_t size, enum dma_data_direction);
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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);
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extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nhwentries, enum dma_data_direction);
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extern dma_addr_t 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);
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extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
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size_t size, enum dma_data_direction);
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extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction);
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extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction);
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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 flag);
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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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extern void dma_sync_single_for_cpu(struct device *, dma_addr_t, size_t,
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enum dma_data_direction);
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extern void dma_sync_single_for_device(struct device *, dma_addr_t,
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size_t, enum dma_data_direction);
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extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t,
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unsigned long offset, size_t,
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enum dma_data_direction);
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extern void dma_sync_single_range_for_device(struct device *, dma_addr_t,
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unsigned long offset, size_t,
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enum dma_data_direction);
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extern void dma_cache_sync(void *vaddr, size_t, enum dma_data_direction);
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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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static inline int
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dma_supported(struct device *dev, u64 mask)
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{
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return 1;
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}
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static inline int
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dma_set_mask(struct device *dev, u64 mask)
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{
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if (!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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*dev->dma_mask = mask;
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return 0;
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}
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#endif /* _ASM_TILE_DMA_MAPPING_H */
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