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dma-mapping.h

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    MIPS: jazz: split dma mapping operations from dma-default
    Christoph Hellwig authored and Paul Burton committed 
    Jazz actually has a very basic IOMMU, so split the ops into a separate
implementation from the generic default support (which is about to go
away anyway).

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19548/


Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Tom Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org
    c5e2bbb4
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    user avatar c5e2bbb4
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    dma-mapping.h 1.10 KiB 
    /* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H

#include <linux/scatterlist.h>
#include <asm/dma-coherence.h>
#include <asm/cache.h>

#ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
#include <dma-coherence.h>
#endif

extern const struct dma_map_ops jazz_dma_ops;
extern const struct dma_map_ops mips_default_dma_map_ops;
extern const struct dma_map_ops mips_swiotlb_ops;

static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
#if defined(CONFIG_MACH_JAZZ)
	return &jazz_dma_ops;
#elif defined(CONFIG_SWIOTLB)
	return &mips_swiotlb_ops;
#elif defined(CONFIG_MIPS_DMA_DEFAULT)
	return &mips_default_dma_map_ops;
#elif defined(CONFIG_DMA_NONCOHERENT_OPS)
	return &dma_noncoherent_ops;
#else
	return &dma_direct_ops;
#endif
}

#define arch_setup_dma_ops arch_setup_dma_ops
static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
				      u64 size, const struct iommu_ops *iommu,
				      bool coherent)
{
#ifdef CONFIG_DMA_PERDEV_COHERENT
	dev->archdata.dma_coherent = coherent;
#endif
}

#endif /* _ASM_DMA_MAPPING_H */