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authorKeith Packard <keithp@keithp.com>2008-10-31 05:38:48 +0300
committerIngo Molnar <mingo@elte.hu>2008-10-31 12:12:40 +0300
commit0839ccb8ac6a9e2d5e175a4ae9c82b5c574d510d (patch)
treec231d0492e4c03ae8d33f2101f21ff2928e56710 /Documentation/io-mapping.txt
parent9663f2e6a6cf3f82b06d8fb699b11b80f92553ba (diff)
downloadlinux-0839ccb8ac6a9e2d5e175a4ae9c82b5c574d510d.tar.xz
i915: use io-mapping interfaces instead of a variety of mapping kludges
Impact: optimize/clean-up the IO mapping implementation of the i915 DRM driver Switch the i915 device aperture mapping to the io-mapping interface, taking advantage of the cleaner API to extend it across all of the mapping uses, including both pwrite and relocation updates. This dramatically improves performance on 64-bit kernels which were using the same slow path as 32-bit non-HIGHMEM kernels prior to this patch. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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