Nouveau - Jul 2012 - [REGRESSION] nouveau: Memory corruption using nva3 engine for 0xaf

Hi Ben, Dave,

Since 3.5-rc0, I have been experiencing occasional screen corruption
on my MacBookAir3,1, using a GeForce 320M (nv50, 0xaf). The X driver
version is xf86-video-nouvea-1.0.1-1 (arch).

I do not know what the root problem is, but I have been able to
isolate the symptoms to the usage of nva3_copy.c. The patch below is
the least intrusive way I could find which kills the symptoms.

Hopefully this will sched some light on the true problem, such that a
fix can be found for 3.5.

Thanks,
Henrik

The nva3 copy engine exhibits random memory corruption in at least one
case, the GeForce 320M (nv50, 0xaf) in the MacBookAir3,1.  This patch
omits creating the engine for the specific chipset, falling back to
M2MF, which kills the symptoms.
---
 drivers/gpu/drm/nouveau/nouveau_state.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c
b/drivers/gpu/drm/nouveau/nouveau_state.c
index 19706f0..b466937 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -731,7 +731,6 @@ nouveau_card_init(struct drm_device *dev)
 			case 0xa3:
 			case 0xa5:
 			case 0xa8:
-			case 0xaf:
 				nva3_copy_create(dev);
 				break;
 			}

On Thu, Jul 05, 2012 at 08:31:13AM +0200, Henrik Rydberg
wrote:
> Hi Ben, Dave,
Hey Henrik,
> 
> Since 3.5-rc0, I have been experiencing occasional screen corruption
> on my MacBookAir3,1, using a GeForce 320M (nv50, 0xaf). The X driver
> version is xf86-video-nouvea-1.0.1-1 (arch).
> 
> I do not know what the root problem is, but I have been able to
> isolate the symptoms to the usage of nva3_copy.c. The patch below is
> the least intrusive way I could find which kills the symptoms.
> 
> Hopefully this will sched some light on the true problem, such that a
> fix can be found for 3.5.
Thanks for tracking down the source of this corruption.  I don't have
any such hardware, so until someone can figure it out, I think we
should apply this patch.

Cheers,
Ben.
> 
> Thanks,
> Henrik
> 
> The nva3 copy engine exhibits random memory corruption in at least one
> case, the GeForce 320M (nv50, 0xaf) in the MacBookAir3,1.  This patch
> omits creating the engine for the specific chipset, falling back to
> M2MF, which kills the symptoms.
> ---
Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
>  drivers/gpu/drm/nouveau/nouveau_state.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c
b/drivers/gpu/drm/nouveau/nouveau_state.c
> index 19706f0..b466937 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_state.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_state.c
> @@ -731,7 +731,6 @@ nouveau_card_init(struct drm_device *dev)
>  			case 0xa3:
>  			case 0xa5:
>  			case 0xa8:
> -			case 0xaf:
>  				nva3_copy_create(dev);
>  				break;
>  			}
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel

Hi Ben,

The new mutexes in nvc0/nv50 (fadb17190/b509656) break resume on my
MBA3,1. A dead-lock somewhere, perhaps? Reverting fixes the problem.

Thanks,
Henrik

On Tue, Jun 4, 2013 at 4:48 PM, Henrik Rydberg <rydberg at euromail.se>
wrote:
> Hi Ben,
>
> The new mutexes in nvc0/nv50 (fadb17190/b509656) break resume on my
> MBA3,1. A dead-lock somewhere, perhaps? Reverting fixes the problem.
A bunch of people saw it earlier. Fixed for nv50 (which is what I
assume you have) in
http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?id=e9de89adcecb7a1296f5bc4d0052f58e18edd0a8

I assume it's on its way to mainline.

  -ilia