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powerpc/dma: trim the fat from <asm/dma-mapping.h>

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There is no need to provide anything but get_arch_dma_ops to
<linux/dma-mapping.h>.  More the remaining declarations to <asm/iommu.h>
and drop all the includes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christoph Hellwig
2019-02-13 08:01:33 +01:00
committed by Michael Ellerman
parent 0617fc0ca4
commit 4a605e2d1a
6 changed files with 14 additions and 29 deletions
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10
arch/powerpc/include/asm/iommu.h
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@@ -325,5 +325,15 @@ extern bool iommu_fixed_is_weak;
#define iommu_fixed_is_weak false
#endif
extern const struct dma_map_ops dma_iommu_ops;
static inline unsigned long device_to_mask(struct device *dev)
{
if (dev->dma_mask && *dev->dma_mask)
return *dev->dma_mask;
/* Assume devices without mask can take 32 bit addresses */
return 0xfffffffful;
}
#endif /* __KERNEL__ */
#endif /* _ASM_IOMMU_H */