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dma-mapping: bypass indirect calls for dma-direct

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Avoid expensive indirect calls in the fast path DMA mapping
operations by directly calling the dma_direct_* ops if we are using
the directly mapped DMA operations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Christoph Hellwig
2018-12-06 13:39:32 -08:00
parent 190d4e5916
commit 356da6d0cd
20 changed files with 150 additions and 119 deletions
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3
arch/arm64/mm/dma-mapping.c
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@@ -462,9 +462,6 @@ static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
const struct iommu_ops *iommu, bool coherent)
{
if (!dev->dma_ops)
dev->dma_ops = &dma_direct_ops;
dev->dma_coherent = coherent;
__iommu_setup_dma_ops(dev, dma_base, size, iommu);