From: Ondrej Zary <linux@zary.sk>
To: Karol Herbst <kherbst@redhat.com>
Cc: Ilia Mirkin <imirkin@alum.mit.edu>,
nouveau <nouveau@lists.freedesktop.org>,
Ben Skeggs <bskeggs@redhat.com>,
"dri-devel" <dri-devel@lists.freedesktop.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [Nouveau] nouveau broken on Riva TNT2 in 5.9.0-rc8: GPU not supported on big-endian
Date: Wed, 28 Oct 2020 21:15:32 +0100 [thread overview]
Message-ID: <202010282115.32811.linux@zary.sk> (raw)
In-Reply-To: <CACO55tuAxbcXbC9zrT5rs34s=5uBugkbcikORU5868ka9bHdkw@mail.gmail.com>
On Saturday 10 October 2020 02:02:42 Karol Herbst wrote:
> On Sat, Oct 10, 2020 at 12:23 AM Ilia Mirkin <imirkin@alum.mit.edu> wrote:
> >
> > On Fri, Oct 9, 2020 at 5:54 PM Karol Herbst <kherbst@redhat.com> wrote:
> > >
> > > On Fri, Oct 9, 2020 at 11:35 PM Ondrej Zary <linux@zary.sk> wrote:
> > > >
> > > > Hello,
> > > > I'm testing 5.9.0-rc8 and found that Riva TNT2 stopped working:
> > > > [ 0.000000] Linux version 5.9.0-rc8+ (zary@gsql) (gcc (Debian 8.3.0-6) 8.3.0, GNU ld (GNU Binutils for Debian) 2.31.1) #326 SMP Fri Oct 9 22:31:40 CEST 2020
> > > > ...
> > > > [ 14.771464] nouveau 0000:01:00.0: GPU not supported on big-endian
> > > > [ 14.771782] nouveau: probe of 0000:01:00.0 failed with error -38
> > > >
> > > > big-endian? WTF? The machine is x86.
> > > >
> > >
> > > mhh, we reworked the endianess checks a bit and apparently that broke
> > > something... I will give it some thoughts, but could you be so kind
> > > and create an mmiotrace under 5.9 with nouveau? You won't need to
> > > start X or anything while doing it. Just enable the trace and modprobe
> > > nouveau and collect the trace.
> >
> > Looks like nvkm_device_endianness unconditionally reads out 0x4. I
> > don't think that reg is there pre-NV11. At least NV4, NV5, NV10 and
> > maybe NV15 (which is logically pre-NV11) don't support big-endian
> > mode. Not sure about NV1A, which was the IGP of the series and IIRC
> > logically pre-NV11 as well (but clearly could only be used with x86
> > chips, since it was part of the motherboard).
> >
> > Aha, it's documented in rnndb:
> >
> > https://github.com/envytools/envytools/blob/master/rnndb/bus/pmc.xml
> > <reg32 offset="0x004" name="ENDIAN" variants="NV1A-"/>
> >
>
> ohh, I should have checked there.. yeah, will write a fix for it then.
> Before my patch we just always tried to switch it, but never threw an
> error.
Any progress with the patch?
--
Ondrej Zary
WARNING: multiple messages have this Message-ID (diff)
From: Ondrej Zary <linux-82g5Cmo2vi4@public.gmane.org>
To: Karol Herbst <kherbst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: nouveau
<nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
dri-devel
<dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: nouveau broken on Riva TNT2 in 5.9.0-rc8: GPU not supported on big-endian
Date: Wed, 28 Oct 2020 21:15:32 +0100 [thread overview]
Message-ID: <202010282115.32811.linux@zary.sk> (raw)
In-Reply-To: <CACO55tuAxbcXbC9zrT5rs34s=5uBugkbcikORU5868ka9bHdkw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Saturday 10 October 2020 02:02:42 Karol Herbst wrote:
> On Sat, Oct 10, 2020 at 12:23 AM Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> wrote:
> >
> > On Fri, Oct 9, 2020 at 5:54 PM Karol Herbst <kherbst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
> > >
> > > On Fri, Oct 9, 2020 at 11:35 PM Ondrej Zary <linux-82g5Cmo2vi4@public.gmane.org> wrote:
> > > >
> > > > Hello,
> > > > I'm testing 5.9.0-rc8 and found that Riva TNT2 stopped working:
> > > > [ 0.000000] Linux version 5.9.0-rc8+ (zary@gsql) (gcc (Debian 8.3.0-6) 8.3.0, GNU ld (GNU Binutils for Debian) 2.31.1) #326 SMP Fri Oct 9 22:31:40 CEST 2020
> > > > ...
> > > > [ 14.771464] nouveau 0000:01:00.0: GPU not supported on big-endian
> > > > [ 14.771782] nouveau: probe of 0000:01:00.0 failed with error -38
> > > >
> > > > big-endian? WTF? The machine is x86.
> > > >
> > >
> > > mhh, we reworked the endianess checks a bit and apparently that broke
> > > something... I will give it some thoughts, but could you be so kind
> > > and create an mmiotrace under 5.9 with nouveau? You won't need to
> > > start X or anything while doing it. Just enable the trace and modprobe
> > > nouveau and collect the trace.
> >
> > Looks like nvkm_device_endianness unconditionally reads out 0x4. I
> > don't think that reg is there pre-NV11. At least NV4, NV5, NV10 and
> > maybe NV15 (which is logically pre-NV11) don't support big-endian
> > mode. Not sure about NV1A, which was the IGP of the series and IIRC
> > logically pre-NV11 as well (but clearly could only be used with x86
> > chips, since it was part of the motherboard).
> >
> > Aha, it's documented in rnndb:
> >
> > https://github.com/envytools/envytools/blob/master/rnndb/bus/pmc.xml
> > <reg32 offset="0x004" name="ENDIAN" variants="NV1A-"/>
> >
>
> ohh, I should have checked there.. yeah, will write a fix for it then.
> Before my patch we just always tried to switch it, but never threw an
> error.
Any progress with the patch?
--
Ondrej Zary
WARNING: multiple messages have this Message-ID (diff)
From: Ondrej Zary <linux@zary.sk>
To: Karol Herbst <kherbst@redhat.com>
Cc: nouveau <nouveau@lists.freedesktop.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Ben Skeggs <bskeggs@redhat.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [Nouveau] nouveau broken on Riva TNT2 in 5.9.0-rc8: GPU not supported on big-endian
Date: Wed, 28 Oct 2020 21:15:32 +0100 [thread overview]
Message-ID: <202010282115.32811.linux@zary.sk> (raw)
In-Reply-To: <CACO55tuAxbcXbC9zrT5rs34s=5uBugkbcikORU5868ka9bHdkw@mail.gmail.com>
On Saturday 10 October 2020 02:02:42 Karol Herbst wrote:
> On Sat, Oct 10, 2020 at 12:23 AM Ilia Mirkin <imirkin@alum.mit.edu> wrote:
> >
> > On Fri, Oct 9, 2020 at 5:54 PM Karol Herbst <kherbst@redhat.com> wrote:
> > >
> > > On Fri, Oct 9, 2020 at 11:35 PM Ondrej Zary <linux@zary.sk> wrote:
> > > >
> > > > Hello,
> > > > I'm testing 5.9.0-rc8 and found that Riva TNT2 stopped working:
> > > > [ 0.000000] Linux version 5.9.0-rc8+ (zary@gsql) (gcc (Debian 8.3.0-6) 8.3.0, GNU ld (GNU Binutils for Debian) 2.31.1) #326 SMP Fri Oct 9 22:31:40 CEST 2020
> > > > ...
> > > > [ 14.771464] nouveau 0000:01:00.0: GPU not supported on big-endian
> > > > [ 14.771782] nouveau: probe of 0000:01:00.0 failed with error -38
> > > >
> > > > big-endian? WTF? The machine is x86.
> > > >
> > >
> > > mhh, we reworked the endianess checks a bit and apparently that broke
> > > something... I will give it some thoughts, but could you be so kind
> > > and create an mmiotrace under 5.9 with nouveau? You won't need to
> > > start X or anything while doing it. Just enable the trace and modprobe
> > > nouveau and collect the trace.
> >
> > Looks like nvkm_device_endianness unconditionally reads out 0x4. I
> > don't think that reg is there pre-NV11. At least NV4, NV5, NV10 and
> > maybe NV15 (which is logically pre-NV11) don't support big-endian
> > mode. Not sure about NV1A, which was the IGP of the series and IIRC
> > logically pre-NV11 as well (but clearly could only be used with x86
> > chips, since it was part of the motherboard).
> >
> > Aha, it's documented in rnndb:
> >
> > https://github.com/envytools/envytools/blob/master/rnndb/bus/pmc.xml
> > <reg32 offset="0x004" name="ENDIAN" variants="NV1A-"/>
> >
>
> ohh, I should have checked there.. yeah, will write a fix for it then.
> Before my patch we just always tried to switch it, but never threw an
> error.
Any progress with the patch?
--
Ondrej Zary
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2020-10-28 22:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-09 21:26 nouveau broken on Riva TNT2 in 5.9.0-rc8: GPU not supported on big-endian Ondrej Zary
2020-10-09 21:26 ` Ondrej Zary
2020-10-09 21:53 ` [Nouveau] " Karol Herbst
2020-10-09 21:53 ` Karol Herbst
2020-10-09 22:23 ` Ilia Mirkin
2020-10-09 22:23 ` Ilia Mirkin
2020-10-10 0:02 ` Karol Herbst
2020-10-10 0:02 ` Karol Herbst
2020-10-10 0:02 ` Karol Herbst
2020-10-28 20:15 ` Ondrej Zary [this message]
2020-10-28 20:15 ` [Nouveau] " Ondrej Zary
2020-10-28 20:15 ` Ondrej Zary
2020-10-28 21:42 ` [Nouveau] " Karol Herbst
2020-10-28 21:42 ` Karol Herbst
2020-10-28 21:42 ` Karol Herbst
2020-10-10 8:49 ` [Nouveau] " Ondrej Zary
2020-10-10 8:49 ` Ondrej Zary
2020-10-10 8:49 ` Ondrej Zary
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