iommu/dma: Use fast DMA domain lookup

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Most parts of iommu-dma already assume they are operating on a default
domain set up by iommu_dma_init_domain(), and can be converted straight
over to avoid the refcounting bottleneck. MSI page mappings may be in
an unmanaged domain with an explicit MSI-only cookie, so retain the
non-specific lookup, but that's OK since they're far from a contended
fast path either way.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Robin Murphy 2018-09-12 16:24:13 +01:00 • committed by Joerg Roedel

parent 6af588fed3

commit 43c5bf11a6

1 changed files with 12 additions and 11 deletions

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drivers/iommu/dma-iommu.c

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