On 01-12-15, Samuel Pitoiset wrote:
>>> Ok, here is a MMT trace of vectorAdd:
>>>
>>> https://fedorapeople.org/~jwrdegoede/vectorAdd.log.gz
>>
>> Hi Hans,
>>
>> Thanks a lot.
>
> Well, I didn't know but Martin has a GK208...
> I just tested the compute support on his card and ... it works without
> any changes. :-)
>
> I'm sorry, I was sure the compute support didn't work on this chipset.
No need to be sorry because, ...
> Feel free to test on your GK208 and report back if you have problems.
I've done that, and for me it does not work, if I try to enable compute
support like this:
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index 461fcaa..ab4ea85 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -187,7 +187,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum
pipe_cap param)
case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
return (class_3d >= NVE4_3D_CLASS) ? 1 : 0;
case PIPE_CAP_COMPUTE:
- return (class_3d <= NVE4_3D_CLASS) ? 1 : 0;
+ return 1;
case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
return nouveau_screen(pscreen)->vram_domain & NOUVEAU_BO_VRAM ? 1 : 0;
@@ -246,8 +246,6 @@ nvc0_screen_get_shader_param(struct pipe_screen *pscreen,
unsigned shader,
return 0;
break;
case PIPE_SHADER_COMPUTE:
- if (class_3d > NVE4_3D_CLASS)
- return 0;
break;
default:
return 0;
@@ -574,11 +572,10 @@ nvc0_screen_init_compute(struct nvc0_screen *screen)
case 0xd0:
return nvc0_screen_compute_setup(screen, screen->base.pushbuf);
case 0xe0:
- return nve4_screen_compute_setup(screen, screen->base.pushbuf);
case 0xf0:
case 0x100:
case 0x110:
- return 0;
+ return nve4_screen_compute_setup(screen, screen->base.pushbuf);
default:
return -1;
}
Then as soon as I do startx (which starts gnome-shell) the machine
freezes. This is with mesa-master with the above changes on top.
X / gnome-shell will happily work of I do not call nve4_screen_compute_setup()
but then test/trivial/compute fails with a null-ptr exception.
Do you perhaps have some extra patches in your tree, or am I just unlucky ?
I've tested this on both a 4.2 and a 4.4-rc3 kernel.
Regards,
Hans
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