From 8fb07c0444c37caa39a8df7c70a694c6211f2f57 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 30 Aug 2010 19:24:18 +0000 Subject: [PATCH] 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 --- Reading git-format-patch failed