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From: Dave Airlie <airlied@linux.ie>
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Cc: freebsd-x11@FreeBSD.org, dri-devel@lists.sourceforge.net
Subject: Re: DRI on FreeBSD with a PCIe X800
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> I was looking at the various options in the radeon man page and came
> across the BusType option.  I had tried both leaving that option out,
> and setting the option to "PCIE".  This morning, I decided to try
> setting it to "PCI" though, according to the man page, "PCIE" simply
> falls back to PCI at the present time, so I figured it wouldn't make a
> difference...  Except that it does make a difference.  If I set the
> BusType to "PCI" dmesg shows:

PCIE never falls back to PCI so the manpage is wrong, this used to be true 
before I implemented PCIE GART support, the PCIE cards don't have the PCI 
gart unlike the AGP cards..

Dave.