On Sat, Aug 09, 2014 at 05:37:22PM +0100, Chris Wilson wrote:
> If an object is not bound into the global GTT, then it cannot be
> accessed via the GTT. This restores the original code that was muddled
> by ppGTT. In the process, we remove a WARN that had long outlived its
> usefulness and was simply being coded around instead.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_gem.c | 22 +++++-----------------
> 1 file changed, 5 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 80b807b724a6..99250d27668d 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -3594,11 +3594,12 @@ int
> i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
> {
> struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
> + struct i915_vma *vma = i915_gem_obj_to_ggtt(obj);
> uint32_t old_write_domain, old_read_domains;
> int ret;
>
> /* Not valid to be called on unbound objects. */
> - if (!i915_gem_obj_bound_any(obj))
> + if (vma == NULL)
> return -EINVAL;
>
> if (obj->base.write_domain == I915_GEM_DOMAIN_GTT)
> @@ -3640,13 +3641,9 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
> old_write_domain);
>
> /* And bump the LRU for this access */
> - if (i915_gem_object_is_inactive(obj)) {
> - struct i915_vma *vma = i915_gem_obj_to_ggtt(obj);
> - if (vma)
> - list_move_tail(&vma->mm_list,
> - &dev_priv->gtt.base.inactive_list);
> -
> - }
> + if (i915_gem_object_is_inactive(obj))
Ben will put a few more needles into his danvet voodoo doll, but I guess
this here is a fairly clear indicator that tracking the active bit on the
object instead of the vma wasn't an awesome idea ...
Anyway, patch looks good, merged.
-Daniel
> + list_move_tail(&vma->mm_list,
> + &dev_priv->gtt.base.inactive_list);
>
> return 0;
> }
> @@ -3810,9 +3807,6 @@ static bool is_pin_display(struct drm_i915_gem_object *obj)
> {
> struct i915_vma *vma;
>
> - if (list_empty(&obj->vma_list))
> - return false;
> -
> vma = i915_gem_obj_to_ggtt(obj);
> if (!vma)
> return false;
> @@ -5255,12 +5249,6 @@ struct i915_vma *i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj)
> {
> struct i915_vma *vma;
>
> - /* This WARN has probably outlived its usefulness (callers already
> - * WARN if they don't find the GGTT vma they expect). When removing,
> - * remember to remove the pre-check in is_pin_display() as well */
> - if (WARN_ON(list_empty(&obj->vma_list)))
> - return NULL;
> -
> vma = list_first_entry(&obj->vma_list, typeof(*vma), vma_link);
> if (vma->vm != obj_to_ggtt(obj))
> return NULL;
> --
> 2.1.0.rc1
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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