Here's a patch to add an AGP GART support for newer Intel chips. I've tested it with i945G + modular-xorg + several media players.
http://www.hadaly.org/fuyuki/agp-i915.patch Note that I'm new to DF kernel and the patch is mostly a blind merge from FreeBSD. On FreeBSD i845G support seems to be accidentally dropped at r1.37. I recovered it in the patch above. On DragonFly PCI_MAP_FIXUP option is required for i915 variants because AGP_APBASE and AGP_I915_MMADR points the same address. (?) Some rework would be needed to eliminate redundant allocations. Known bug: panic on detach. I don't know why the function is working on FreeBSD. (maybe not?)
