On Thu, Apr 23, 2015 at 12:54:37PM +0100, Chris Wilson wrote:
> Since
>
> commit 43566dedde54f9729113f5f9fde77d53e75e61e9
> Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Date: Fri Jan 2 16:29:29 2015 +0530
>
> drm/i915: Broaden application of set-domain(GTT)
>
> we allowed objects to be in the GTT domain, but unbound. Therefore
> removing the GTT cache domain when removing the GGTT vma is no longer
> semantically correct.
>
> An unfortunate side-effect is we lose the wondrously named
> i915_gem_object_finish_gtt(), not to be confused with
> i915_gem_gtt_finish_object()!
What are we going to do without that bit of hilarity ...
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Akash Goel <akash.goel@xxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Queued for -next (with the rebase conflict resolved because I don't have
your tree), thanks for the patch.
-Daniel
> ---
> drivers/gpu/drm/i915/i915_gem.c | 22 +++-------------------
> 1 file changed, 3 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 6ffc4a619849..1ea94aec41d1 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -3171,23 +3171,6 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj,
> return 0;
> }
>
> -static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
> -{
> - /* Force a pagefault for domain tracking on next user access */
> - i915_gem_release_mmap(obj);
> -
> - if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
> - return;
> -
> - /* Wait for any direct GTT access to complete */
> - mb();
> -
> - obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT;
> - obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT;
> -
> - trace_i915_gem_object_change_domain(obj);
> -}
> -
> int i915_vma_unbind(struct i915_vma *vma)
> {
> struct drm_i915_gem_object *obj = vma->obj;
> @@ -3219,12 +3202,13 @@ int i915_vma_unbind(struct i915_vma *vma)
> */
>
> if (vma->is_ggtt && vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
> - i915_gem_object_finish_gtt(obj);
> -
> /* release the fence reg _after_ flushing */
> ret = i915_gem_object_put_fence(obj);
> if (ret)
> return ret;
> +
> + /* Force a pagefault for domain tracking on next user access */
> + i915_gem_release_mmap(obj);
> }
>
> trace_i915_vma_unbind(vma);
> --
> 2.1.4
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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