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Date: Tue, 5 Feb 2002 15:08:15 -0800 (PST)
From: Patrick Mochel <mochel@osdl.org>
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To: Andre Hedrick <andre@linuxdiskcert.org>
cc: Russell King <rmk@arm.linux.org.uk>, Pavel Machek <pavel@suse.cz>,
        kernel list <linux-kernel@vger.kernel.org>
Subject: Re: driverfs support for motherboard devices
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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

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