On Sun, Mar 18, 2012 at 01:39:52PM -0700, Ben Widawsky wrote:
> paranoia
>
> For context support the HW expects the default context to always be
> available as there is no way to shut off HW contexts once turned on
> (afaics). This is problematic when unloading the driver as we have no
> way to prevent the GPU from expecting the BO to still be present once
> unloaded.
>
> The best we can do to remedy the situation is to attempt a GPU reset
> when doing the unload.
>
> NOTE: this patch isn't *really* required to go with the rest of the
> context serious.
>
> Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
I think the paranoia here is justified (albeit it would benefit from some
commit-message love imo). But we do not support i915_reset on all gens, so
I think you need to add a gen >= 5 check here.
> ---
> drivers/gpu/drm/i915/i915_gem.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index c1aab45..848cc45 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -3910,6 +3910,9 @@ i915_gem_lastclose(struct drm_device *dev)
> ret = i915_gem_idle(dev);
> if (ret)
> DRM_ERROR("failed to idle hardware: %d\n", ret);
> + ret = i915_reset(dev, GRDOM_FULL);
> + if (ret)
> + DRM_ERROR("failed to reset gpu: %d\n", ret);
> }
>
> static void
> --
> 1.7.9.4
>
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--
Daniel Vetter
Mail: dan...@ffwll.ch
Mobile: +41 (0)79 365 57 48
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