iommu/tegra: gart: Optimize mapping / unmapping performance

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Currently GART writes one page entry at a time. More optimal would be to
aggregate the writes and flush BUS buffer in the end, this gives map/unmap
10-40% performance boost (depending on size of mapping) in comparison to
flushing after each page entry update.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Dmitry Osipenko 2018-12-12 23:38:48 +03:00 • committed by Joerg Roedel

parent 1d7ae53b15

commit 2fc0ac180d

1 changed files with 10 additions and 2 deletions

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drivers/iommu/tegra-gart.c

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