Re: driverfs support for motherboard devices

Pavel Machek
2002-02-06T22:48:21Z

Hi!

> > > On Tue, Feb 05, 2002 at 10:43:14AM -0800, Patrick Mochel wrote:
> > > > I think that ide should get its own bus, as a child of the ide controller.
> > > > I haven't looked at ide yet at all. But, on most modern systems, the ide
> > > > controller is a function of the southbridge, so ide devices should go
> > > > under that. Like what the usb stuff does now...
> > >
> > > What about, say, a Promise PCI IDE card? You really need to reference
> > > the parent PCI device when the is one.
> >
> > LOL, how about ones that are quad-channel with a DEC-Bridge to slip the
> > local BUSS?
>
> LOL? I don't understand...
>
> I don't see how any of those cases are necessarily hard to visualize.
>
> Case 1: Typical PC with IDE as function of southbridge.
>
> pci0
> |
> -- 07.2 (IDE controller)
> |
> --- disk0
> |
> --- disk1
>
> Case 2: Promise IDE Controller with 2 channels
>
>
> pci0
> |
> --- 03.0 (Promise IDE Controller)
> |
> --- channel0
> |
> ---- disk0
> |
> ---- disk1
>

These are easy ones, but what about

Case 4: 386 with no PCI

and what's worse

Case 5: 486 with both PCI and VLB, where ide is on the VLB?

cases 4 and 5 are IMO hard, because it is difficult to know where it
really is... and I'm not sure current kernel knows it.
Pavel
--
(about SSSCA) "I don't say this lightly. However, I really think that the U.S.
no longer is classifiable as a democracy, but rather as a plutocracy." --hpa