ad154880c0
Add dma-debug interface debug_dma_mapping_error() to debug drivers that fail to check dma mapping errors on addresses returned by dma_map_single() and dma_map_page() interfaces. Signed-off-by: Shuah Khan <shuah.khan@hp.com> Acked-by: Mark Salter <msalter@redhat.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
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* Port on Texas Instruments TMS320C6x architecture
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*
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* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
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* Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef _ASM_C6X_DMA_MAPPING_H
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#define _ASM_C6X_DMA_MAPPING_H
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#include <linux/dma-debug.h>
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#include <asm-generic/dma-coherent.h>
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#define dma_supported(d, m) 1
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static inline int 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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/*
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* DMA errors are defined by all-bits-set in the DMA address.
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*/
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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debug_dma_mapping_error(dev, dma_addr);
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return dma_addr == ~0;
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}
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extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
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size_t size, enum dma_data_direction dir);
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extern void dma_unmap_single(struct device *dev, dma_addr_t handle,
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size_t size, enum dma_data_direction dir);
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extern int dma_map_sg(struct device *dev, struct scatterlist *sglist,
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int nents, enum dma_data_direction direction);
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extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
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int nents, enum dma_data_direction direction);
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static inline 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 dir)
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{
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dma_addr_t handle;
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handle = dma_map_single(dev, page_address(page) + offset, size, dir);
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debug_dma_map_page(dev, page, offset, size, dir, handle, false);
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return handle;
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}
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static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
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size_t size, enum dma_data_direction dir)
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{
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dma_unmap_single(dev, handle, size, dir);
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debug_dma_unmap_page(dev, handle, size, dir, false);
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}
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extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
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size_t size, enum dma_data_direction dir);
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extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
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size_t size,
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enum dma_data_direction dir);
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extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir);
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extern void 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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extern void coherent_mem_init(u32 start, u32 size);
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extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
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extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
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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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#endif /* _ASM_C6X_DMA_MAPPING_H */
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