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authorGrant Grundler <grundler@parisc-linux.org>2006-03-30 07:13:21 +0000
committerKyle McMartin <kyle@hera.kernel.org>2006-04-21 22:20:33 +0000
commitb312c33e362696d873931d8f84a89b3e894077c8 (patch)
tree94f0607b3ee54dfd87c7849f6666d9f68452491a /arch/parisc/defconfig
parent67a5a59d3301949f51f2d617d689f005c6d21470 (diff)
downloadlinux-2.6.34-ux500-b312c33e362696d873931d8f84a89b3e894077c8.tar.gz
[PARISC] Document that we tolerate "Relaxed Ordering"
This means "DMA Read returns" can bypass "MMIO Writes". Violating the PCI specs in this case improves outbound DMA "flows" and is currently not required by any drivers. This is NOT a new behavior. Previous chipsets did this already and I believe ZX1 PDC was already setting this for hpux. I just want to further document the behavior. Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
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