| commit | 8fb07c0444c37caa39a8df7c70a694c6211f2f57 | [log] [tgz] |
|---|---|---|
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | Mon Aug 30 19:24:18 2010 +0000 |
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | Thu Sep 02 14:07:32 2010 +1000 |
| tree | 1a8d1d5c3d30098822e9ca7f1931a136334641da | |
| parent | 5b6e9ff6deb703b95fb355bb66d86096c1a2df09 [diff] |
powerpc/dart_iommu: Support for 64-bit iommu bypass window on PCIe The PCI-Express bus off the U4/CPC945 bridge supports direct DMA to all of memory, bypassing the DART iommu, for 64-bit capable devices. This adds support for it on Bimini and Apple Quad G5's in order to improve DMA performances of cards using that slot (the x16 graphics slot). Tested with an Intel ixgbe 10GE card. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>