On Fri, Nov 18, 2016 at 12:06:01PM +0200, David Weinehall wrote:
> On resume we unbind+bind our VMA-mappings. This patch simplifies
> this a bit by introducing a rebind() helper. As a nice side-effect
> this also makes the resume callgraph self-documenting.
>
> Patch by Chris.
>
> Signed-off-by: David Weinehall <david.weineh...@linux.intel.com>
> CC: Chris Wilson <ch...@chris-wilson.co.uk>
> ---
> drivers/gpu/drm/i915/i915_gem_gtt.c | 7 +------
> drivers/gpu/drm/i915/i915_vma.c | 10 ++++++++++
> drivers/gpu/drm/i915/i915_vma.h | 6 ++++--
> 3 files changed, 15 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
> b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index b4bde1452f2a..76af33443fcd 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -3299,12 +3299,7 @@ void i915_gem_restore_gtt_mappings(struct
> drm_i915_private *dev_priv)
> if (vma->vm != &ggtt->base)
> continue;
>
> - if (!i915_vma_unbind(vma))
> - continue;
> -
> - WARN_ON(i915_vma_bind(vma, obj->cache_level,
> - PIN_UPDATE));
> - ggtt_bound = true;
> + ggtt_bound |= i915_vma_rebind(vma);
> }
>
> if (ggtt_bound)
> diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
> index 738ff3a5cd6e..1fc54686c2c3 100644
> --- a/drivers/gpu/drm/i915/i915_vma.c
> +++ b/drivers/gpu/drm/i915/i915_vma.c
> @@ -648,3 +648,13 @@ int i915_vma_unbind(struct i915_vma *vma)
> return 0;
> }
>
> +bool i915_vma_rebind(struct i915_vma *vma)
> +{
> + if (i915_vma_is_pinned(vma)) {
> + WARN_ON(i915_vma_bind(vma, vma->obj->cache_level, PIN_UPDATE));
> + return true;
> + } else {
> + WARN_ON(i915_vma_unbind(vma));
> + return false;
> + }
> +}
This function is a little warny for general consumption.
I think I would prefer this next to i915_gem_restore_gtt_mappings() as
perhaps static bool restore_vma(struct i915_vma *vma) {}
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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