On 11/20/2015 06:16 AM, Chris Wilson wrote:
> As we mark the preallocated objects as bound, we should also flag them
> correctly as being map-and-fenceable (if appropriate!) so that later
> users do not get confused and try and rebind the pinned vma in order to
> get a map-and-fenceable binding.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: "Goel, Akash" <akash.goel@xxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/i915_gem.c | 43 +++++++++++++++++++---------------
> drivers/gpu/drm/i915/i915_gem_gtt.c | 1 +
> drivers/gpu/drm/i915/i915_gem_stolen.c | 1 +
> 4 files changed, 27 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index f2b65433ed7d..24143e5273b6 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2844,6 +2844,7 @@ i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
>
> int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
> u32 flags);
> +void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
> int __must_check i915_vma_unbind(struct i915_vma *vma);
> /*
> * BEWARE: Do not use the function below unless you can _absolutely_
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 3ad198a41c4a..e6a8a52c8a6b 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -4092,6 +4092,29 @@ i915_vma_misplaced(struct i915_vma *vma, uint32_t alignment, uint64_t flags)
> return false;
> }
>
> +void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
> +{
> + struct drm_i915_gem_object *obj = vma->obj;
> + bool mappable, fenceable;
> + u32 fence_size, fence_alignment;
> +
> + fence_size = i915_gem_get_gtt_size(obj->base.dev,
> + obj->base.size,
> + obj->tiling_mode);
> + fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev,
> + obj->base.size,
> + obj->tiling_mode,
> + true);
> +
> + fenceable = (vma->node.size == fence_size &&
> + (vma->node.start & (fence_alignment - 1)) == 0);
> +
> + mappable = (vma->node.start + fence_size <=
> + to_i915(obj->base.dev)->gtt.mappable_end);
> +
> + obj->map_and_fenceable = mappable && fenceable;
> +}
> +
> static int
> i915_gem_object_do_pin(struct drm_i915_gem_object *obj,
> struct i915_address_space *vm,
> @@ -4159,25 +4182,7 @@ i915_gem_object_do_pin(struct drm_i915_gem_object *obj,
>
> if (ggtt_view && ggtt_view->type == I915_GGTT_VIEW_NORMAL &&
> (bound ^ vma->bound) & GLOBAL_BIND) {
> - bool mappable, fenceable;
> - u32 fence_size, fence_alignment;
> -
> - fence_size = i915_gem_get_gtt_size(obj->base.dev,
> - obj->base.size,
> - obj->tiling_mode);
> - fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev,
> - obj->base.size,
> - obj->tiling_mode,
> - true);
> -
> - fenceable = (vma->node.size == fence_size &&
> - (vma->node.start & (fence_alignment - 1)) == 0);
> -
> - mappable = (vma->node.start + fence_size <=
> - dev_priv->gtt.mappable_end);
> -
> - obj->map_and_fenceable = mappable && fenceable;
> -
> + __i915_vma_set_map_and_fenceable(vma);
> WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable);
> }
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index a09f8f0510d5..74b26b2d0889 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -2704,6 +2704,7 @@ static int i915_gem_setup_global_gtt(struct drm_device *dev,
> return ret;
> }
> vma->bound |= GLOBAL_BIND;
> + __i915_vma_set_map_and_fenceable(vma);
> list_add_tail(&vma->mm_list, &ggtt_vm->inactive_list);
> }
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
> index 598ed2facf85..3476877fc0d6 100644
> --- a/drivers/gpu/drm/i915/i915_gem_stolen.c
> +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
> @@ -688,6 +688,7 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
> }
>
> vma->bound |= GLOBAL_BIND;
> + __i915_vma_set_map_and_fenceable(vma);
> list_add_tail(&vma->mm_list, &ggtt->inactive_list);
> }
>
>
Looks important.
Reviewed-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
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