Re: PCI Domains

[Michael <macallan%netbsd.org@localhost>]

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Hello,

On Feb 8, 2010, at 3:36 PM, Jonathan A. Kollasch wrote:

> On Mon, Feb 08, 2010 at 04:04:38PM -0300, Cesar Catrian Carreño wrote:

> > The pciaccess library sets all domains in 0 for NetBSD. This  
> > library is
> > used by modular-xorg-server. By now, DRI in -current is broken for  
> > this
> > issue.

Are you talking about Xorg from pkgsrc? The libpciaccess that ships  
with -current doesn't do that anymore for quite some time now.

> > The commands pcictl(8) and lspci(8) show different output in this
> > subject:
>
> lspci doesn't use libpciaccess.  it uses libpciutils.

Yeah, nothing outside /usr/X11R7/ or maybe /usr/pkg/ uses libpciaccess.

> > $ pcictl pci1 list
> > 001:00:0: ATI Technologies Radeon 8500 QL (VGA display)
> >
> > $ lspci -D | grep VGA
> > 0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon
> > R200 QL [Radeon 8500 LE]
>
> That output looks consistent enough for x86.

Nothing inconsistent here.

> > What's the status for mapping PCI Domains for -current?
>
> What port are you on?

Doesn't really matter - we support something analogous on all ports.  
Since userland has no sane way to determine the relationship between  
two given PCI buses we throw each bus into its own domain - it only  
makes a difference if you want to access IO space belonging to a  
specific bus but on x86 that's a non-issue and most non-x86 machines  
seem to prefer memory mapped IO as well.

have fun
Michael

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