[openib-general] HP ZX1 and HP IB cards...

[Michael S. Tsirkin]

Hello!
Quoting r. Grant Grundler (iod00d at hp.com) "Re: [openib-general] HP ZX1 and HP IB cards...":
> On Wed, Nov 24, 2004 at 09:16:24PM +0200, Michael S. Tsirkin wrote:
> > > 0000:41:00.0 InfiniBand: Mellanox Technology MT23108 InfiniHost (rev a1)
> > >         Subsystem: Mellanox Technology MT23108 InfiniHost
> > >         Flags: 66MHz, medium devsel, IRQ 66
> > >         Memory at 00000000a0800000 (64-bit, non-prefetchable) [size=1M]
> > >         Memory at 00000000a0000000 (64-bit, prefetchable) [size=8M]
> > >         Memory at <unassigned> (64-bit, prefetchable)
> 
> <unassigned> is the problem.
> 
> > > System Firmware is having problems with this card.
> 
> yeah - turned out to be a firmware bug...not clear the firmware
> team will fix it but they are at least aware of it.
> 
> We are also considering adding 64-bit MMIO (aka GMMIO) support
> to ia64-linux. We just learned that some boxes don't assign GMMIO.

Makes perfect sence to me.
I always wandered why more systems dont do it.
It is a real problem to allocate
a 256Mbyte DDR BAR out of the 32-bit PCI space.

MST