Nouveau - Dec 2012 - [Bug 58806] New: failed to create kernel channel, -12 on G4 PPC

https://bugs.freedesktop.org/show_bug.cgi?id=58806

          Priority: medium
            Bug ID: 58806
          Assignee: nouveau at lists.freedesktop.org
           Summary: failed to create kernel channel, -12 on G4 PPC
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: stefan at konink.de
          Hardware: PowerPC
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Created attachment 72184
  --> https://bugs.freedesktop.org/attachment.cgi?id=72184&action=edit
Bisecting between v3.6 and v3.7

The v3.7 version of nouveau fails to set up acceleration, while it does work
for v3.6. We have tried to bisect the problem but stubled on a change we cannot
beyond:

git show 77145f1cbdf8d28b46ff8070ca749bad821e0774 --
drivers/gpu/drm/nouveau/core/subdev/bios/base.c

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20121227/3dda16b2/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=58806

--- Comment #1 from Stefan de Konink <stefan at konink.de> ---
Created attachment 72185
  --> https://bugs.freedesktop.org/attachment.cgi?id=72185&action=edit
dmesg including debugging

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20121227/d4065ddf/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=58806

--- Comment #2 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
What we found so far:

Acceleration set up fails like that:
Stacktrace:
nouveau_drm_load
nouveau_accel_init
nouveau_channel_new
nouveau_channel_ind
nouveau_channel_prep
nouveau_bo_map
ttm_bo_kmap
ttm_bo_ioremap
ioremap_wc

ioremap_wc returns NULL. bo->mem.bus.base and bo->mem.bus.offset are 0.
Probably because of this code:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=drivers/char/agp/uninorth-agp.c;h=a32c492baf5cc15001ad6882dc25a14d1be86419;hb=29594404d7fe73cd80eaa4ee8c43dcc53970c60e#l125
and ioremap fails because of this:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=arch/powerpc/mm/pgtable_32.c;h=6c856fb8c15b01705fb6cf5ff28c0a232d85d3bd;hb=29594404d7fe73cd80eaa4ee8c43dcc53970c60e#l204

Booting with nouveau.agpmode=0 works.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20121227/fd0e2d9b/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=58806

--- Comment #3 from Stefan de Konink <stefan at konink.de> ---
Created attachment 72187
  --> https://bugs.freedesktop.org/attachment.cgi?id=72187&action=edit
dmesg for linux 3.6.6

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20121227/74c78678/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=58806

--- Comment #4 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
http://lists.freedesktop.org/archives/dri-devel/2012-December/032740.html

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20121231/c0f38803/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=58806

--- Comment #5 from Stefan de Konink <stefan at konink.de> ---
I confirm that the fix works on 3.8-rc1

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20121231/c0c826c5/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=58806

Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
This fix just hit Linus' tree.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20130104/d7272766/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=58806

Florian Mickler <florian at mickler.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |florian at mickler.org

--- Comment #7 from Florian Mickler <florian at mickler.org> ---
A patch referencing this bug report has been merged in Linux v3.8-rc3:

commit eda85d6ad490923152544fba0473798b6cc0edf6
Author: Aaro Koskinen <aaro.koskinen at iki.fi>
Date:   Mon Dec 31 03:34:59 2012 +0200

    drm/nouveau: fix init with agpgart-uninorth

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20130111/4a844b57/attachment.html>