On Fre, 2012-11-16 at 11:54 +0200, Aaro Koskinen wrote:
> Check that the AGP aperture can be mapped. This follows a similar change
> done for Radeon (commit 365048ff, drm/radeon: AGP memory is only I/O if
> the aperture can be mapped by the CPU.).
>
> The patch fixes the following error seen on G5 iMac:
>
> nouveau E[ DRM] failed to create kernel channel, -12
>
> Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
> ---
> drivers/gpu/drm/nouveau/nouveau_bo.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
> index 35ac57f..5f0e7ef 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_bo.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
> @@ -1279,7 +1279,7 @@ nouveau_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
> if (drm->agp.stat == ENABLED) {
> mem->bus.offset = mem->start << PAGE_SHIFT;
> mem->bus.base = drm->agp.base;
> - mem->bus.is_iomem = true;
> + mem->bus.is_iomem = !dev->agp->cant_use_aperture;
Looks good, though radeon also doesn't set TTM_MEMTYPE_FLAG_MAPPABLE for
the TT memory type if the aperture can't be mapped directly. Maybe
nouveau should do the same, or maybe it doesn't really matter. Not sure.
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Debian, X and DRI developer
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/dri-devel
