From: "Gerhard Pircher" <gerhard_pircher@gmx•net>
To: Benjamin Herrenschmidt <benh@kernel•crashing.org>
Cc: linuxppc-dev@ozlabs•org, debian-powerpc@lists•debian.org
Subject: Re: AGPGART driver for ArticiaS - ioremap() problem
Date: Mon, 23 Jan 2006 23:12:07 +0100 (MET) [thread overview]
Message-ID: <29335.1138054327@www080.gmx.net> (raw)
In-Reply-To: 1137883724.12998.74.camel@localhost.localdomain
> --- Ursprüngliche Nachricht ---
> Von: Benjamin Herrenschmidt <benh@kernel•crashing.org>
> An: Gerhard Pircher <gerhard_pircher@gmx•net>
> Kopie: linuxppc-dev@ozlabs•org, debian-powerpc@lists•debian.org
> Betreff: Re: AGPGART driver for ArticiaS - ioremap() problem
> Datum: Sun, 22 Jan 2006 09:48:44 +1100
>
> On Sat, 2006-01-21 at 02:59 +0100, Gerhard Pircher wrote:
>
> > Yes, I see. :( The code mostly allocates the resources for the AGPGART
> > driver beyond the real memory space, thus preventing the X server to
> > work. Sometimes the resource is also mapped to where the resource of
> > the graphic card resides (address 0x88000000, compare with the included
> > iomem file).
>
> The AGP aperture should generally be located "outside" of those spaces.
> That is above RAM and in some place where no device already resides...
> It can be made to overlap RAM but that isn't a good idea (that's what
> happens on Macs though due to a bug in the Apple chipset).
Ahh, so the AGP aperture should not be within the memory space and any other
PCI/IO address range. Slowly but surely I become confused. ;-)
> I don't see anything related to AGP in your output... you didn't post
> the lspci as root thus it's missing all the useful infos ;)
I included a new lspci output log. :-) (now done as root)
> Also, the AGP base isn't generally a PCI BAR of the bridge... it is one
> in your case ?
I'm afraid I can't answer this question (you know, we have no datasheet for
the ArticiaS yet). From what I can see in the log, there is an unassigned
memory region (type 0, should be <4GB I guess). Could this affect AGP
operation?
Gerhard
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next prev parent reply other threads:[~2006-01-23 22:12 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-21 1:59 AGPGART driver for ArticiaS - ioremap() problem Gerhard Pircher
2006-01-21 22:48 ` Benjamin Herrenschmidt
2006-01-23 22:12 ` Gerhard Pircher [this message]
2006-01-23 23:15 ` Benjamin Herrenschmidt
-- strict thread matches above, loose matches on Subject: below --
2006-01-23 22:15 Gerhard Pircher
2006-01-15 23:10 Gerhard Pircher
2006-01-15 23:25 ` Benjamin Herrenschmidt
2006-01-16 8:11 ` Gerhard Pircher
2006-01-16 23:18 ` Benjamin Herrenschmidt
2006-01-17 8:37 ` Gerhard Pircher
2006-01-17 21:24 ` Benjamin Herrenschmidt
2006-01-18 19:40 ` Gerhard Pircher
2006-01-18 23:09 ` Benjamin Herrenschmidt
2006-01-19 8:50 ` Gerhard Pircher
2006-01-19 9:59 ` Benjamin Herrenschmidt
2006-01-19 10:52 ` Gerhard Pircher
2006-01-19 22:09 ` Benjamin Herrenschmidt
2006-01-20 11:16 ` Gerhard Pircher
2006-01-20 23:00 ` Benjamin Herrenschmidt
2006-01-11 21:00 Gerhard Pircher
2006-01-11 21:52 ` John W. Linville
2006-01-11 22:18 ` Gerhard Pircher
2006-01-12 4:44 ` Benjamin Herrenschmidt
2006-01-12 8:15 ` Gerhard Pircher
2006-01-15 21:48 ` Benjamin Herrenschmidt
2006-01-12 19:15 ` Gerhard Pircher
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