2002-09-12 02:31:47

by Nicholas Miell

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Subject: PCI: device 00:00.0 has unknown header type 7f, ignoring.

I've been getting this message since, oh, the dawn of time or so.
I finally worked up enough curiosity to attempt to figure out what the
mysterious 7f header is, but the PCI specs require money.

So, anyone out there happen to know what header 7f is, and why the
kernel doesn't recognize it?

- Nicholas


2002-09-12 05:19:43

by H. Peter Anvin

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Subject: Re: PCI: device 00:00.0 has unknown header type 7f, ignoring.

Followup to: <1031798190.1499.8.camel@entropy>
By author: Nicholas Miell <[email protected]>
In newsgroup: linux.dev.kernel
>
> I've been getting this message since, oh, the dawn of time or so.
> I finally worked up enough curiosity to attempt to figure out what the
> mysterious 7f header is, but the PCI specs require money.
>
> So, anyone out there happen to know what header 7f is, and why the
> kernel doesn't recognize it?
>

What northbridge (chipset) does your system have?

-hpa
--
<[email protected]> at work, <[email protected]> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <[email protected]>

2002-09-12 06:53:27

by Nicholas Miell

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Subject: Re: PCI: device 00:00.0 has unknown header type 7f, ignoring.

On Wed, 2002-09-11 at 22:24, H. Peter Anvin wrote:
> Followup to: <1031798190.1499.8.camel@entropy>
> By author: Nicholas Miell <[email protected]>
> In newsgroup: linux.dev.kernel
> >
> > I've been getting this message since, oh, the dawn of time or so.
> > I finally worked up enough curiosity to attempt to figure out what the
> > mysterious 7f header is, but the PCI specs require money.
> >
> > So, anyone out there happen to know what header 7f is, and why the
> > kernel doesn't recognize it?
> >
>
> What northbridge (chipset) does your system have?
>

Sorry, I have no idea. It's a Compaq Deskpro 4000 5133 from 1998 or so
that I obtained second-hand, with no documentation, and neither the
Compaq website nor an inspection of the motherboard has anything useful.

- Nicholas

2002-09-13 19:57:20

by Ken Ryan

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Subject: Re: PCI: device 00:00.0 has unknown header type 7f, ignoring.


According to the PCI 2.2 spec, bit 7 indicates a multifunction device
(=0 or single function in your case), bits 6:0 indicate the header
format. 00=normal device (standard layout), 01=PCI-PCI bridge,
02=CardBus bridge, all other values are Reserved.

Ken Ryan