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iommu/tegra: gart: Optimize mapping / unmapping performance
authorDmitry Osipenko <digetx@gmail.com>
Wed, 12 Dec 2018 20:38:48 +0000 (23:38 +0300)
committerJoerg Roedel <jroedel@suse.de>
Wed, 16 Jan 2019 12:54:09 +0000 (13:54 +0100)
commit2fc0ac180d0f160cdd5fc69407ca7eb47b3eff99
tree2dcb9cde64712c9cbfe08e1493c19108ea35d6f1tree
parent1d7ae53b152dbc5ba0a4f6a83ecc42ac66f52d11commit | diff
iommu/tegra: gart: Optimize mapping / unmapping performance

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>
drivers/iommu/tegra-gart.c diff | blob | history
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