Re: driverfs support for motherboard devices

From: Patrick Mochel (mochel@osdl.org)
Date: Tue Feb 05 2002 - 18:08:15 EST


On Tue, 5 Feb 2002, Andre Hedrick wrote:

> On Tue, 5 Feb 2002, Russell King wrote:
>
> > 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

Case 3: Quad channel DEC Bridge

Ok, maybe I don't understand completely what you're talking about, Andre.
That's just a 4 channel IDE controller, that happens to be on the board?
So, it's looks the same as the last example.

Unless, I'm missing something, which is always likely.

        -pat

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Thu Feb 07 2002 - 21:00:45 EST