In the XFree86 README.DRI (very Linux centric), it says:
9.1 Bus Mastering
...
Run lspci (as root) and find the information describing your graphics
adapter. ...
Use the setpci command to examine bit two of register 4 for your
graphics card. This will indicate whether or not bus mastering is
enabled.
setpci -s 01:00.0 4.w
Is this the appropriate translation into FreeBSD?:
# pciconf -l | grep drm0
drm0@pci1:5:0: class=0x030000 card=0x0641102b chip=0x0525102b rev=0x82 hdr=0x00
# pciconf -r pci1:5:0 4
0x02900007
0x7 & 0x4 == true.
Thanks,
Randall
--
Randall Hopper
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