is PCITAG big enough for future expansion?

[Dave Airlie]

I'm not fully up on the PCI spec, but what are the defined sizes for the

domain, bus, device and function

can these become larger than 255? we munge them all into an unsigned
long PCITAG is it big enough for future expansion.. I think the PCITAG
thing is a bit of an ugly hack, its not as if passing a pointer to a
PciBusId instead of the unsigned long is really going to make a huge
performance difference to the X server...

Dave.