Re: PCI-X support

[Vojtech Pavlik]

On Fri, Jul 01, 2005 at 02:00:15PM -0400, Richard B. Johnson wrote:
> On Fri, 1 Jul 2005, christos gentsis wrote:
> 
> >Hello
> >
> >I have a friend that his Msc project is related with the development
> >over a PCI-X card. the problem is that he do not know if the Linux
> >kernel support the PCI-X bus. i try to find something related with the
> >PCI-X in the kernel source but i didn't found any file or folder with a
> >relevant name... Does any one know if PCI-X bus supported from Linux and
> >if no how can he patch the kernel to support it...?
> >
> >Thanks
> >Chris
> 
> Sure PCI-X is just PCI/66 with 64-bits. It's just like PCI/66
> from a software standpoint.
 
Not really. 64-bit 66MHz PCI is normal PCI, within the PCI 2.1 spec.
Common PCI-X is running at 133MHz, 64-bit wide.

You're correct, though, that from the software standpoint it's not much
different and Linux supports it natively. I'm not sure about MSI-X
extensions, though.

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR
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