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Commit 91e6711e authored by Joonas Lahtinen's avatar Joonas Lahtinen Committed by Daniel Vetter
Browse files

drm/i915: Do not make assumptions on GGTT VMA sizes 



GGTT VMA sizes might be smaller than the whole object size due to
different GGTT views.

v2:
- Separate GGTT view constraint calculations from normal view
  constraint calculations (Chris Wilson)
v3:
- Do not bother with debug wording. (Tvrtko Ursulin)
v4:
- Clearer logic for calculating map_and_fenceable (Tvrtko Ursulin)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
[danvet: Drop BUG_ON, it's redudant.]
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 16be17af

drivers/gpu/drm/i915/i915_gem.c

+50 −24
Original line number Diff line number Diff line
@@ -3498,7 +3498,8 @@ static bool i915_gem_valid_gtt_space(struct i915_vma *vma, 
}



/**

 * Finds free space in the GTT aperture and binds the object there.

 * Finds free space in the GTT aperture and binds the object or a view of it

 * there.

 */

static struct i915_vma *

i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj,
@@ -3517,36 +3518,60 @@ i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj, 
	struct i915_vma *vma;

	int ret;



	if(WARN_ON(i915_is_ggtt(vm) != !!ggtt_view))

	if (i915_is_ggtt(vm)) {

		u32 view_size;



		if (WARN_ON(!ggtt_view))

			return ERR_PTR(-EINVAL);



		view_size = i915_ggtt_view_size(obj, ggtt_view);



		fence_size = i915_gem_get_gtt_size(dev,

						   view_size,

						   obj->tiling_mode);

		fence_alignment = i915_gem_get_gtt_alignment(dev,

							     view_size,

							     obj->tiling_mode,

							     true);

		unfenced_alignment = i915_gem_get_gtt_alignment(dev,

								view_size,

								obj->tiling_mode,

								false);

		size = flags & PIN_MAPPABLE ? fence_size : view_size;

	} else {

		fence_size = i915_gem_get_gtt_size(dev,

						   obj->base.size,

						   obj->tiling_mode);

		fence_alignment = i915_gem_get_gtt_alignment(dev,

							     obj->base.size,

						     obj->tiling_mode, true);

							     obj->tiling_mode,

							     true);

		unfenced_alignment =

			i915_gem_get_gtt_alignment(dev,

						   obj->base.size,

					   obj->tiling_mode, false);

						   obj->tiling_mode,

						   false);

		size = flags & PIN_MAPPABLE ? fence_size : obj->base.size;

	}



	if (alignment == 0)

		alignment = flags & PIN_MAPPABLE ? fence_alignment :

						unfenced_alignment;

	if (flags & PIN_MAPPABLE && alignment & (fence_alignment - 1)) {

		DRM_DEBUG("Invalid object alignment requested %u\n", alignment);

		DRM_DEBUG("Invalid object (view type=%u) alignment requested %u\n",

			  ggtt_view ? ggtt_view->type : 0,

			  alignment);

		return ERR_PTR(-EINVAL);

	}



	size = flags & PIN_MAPPABLE ? fence_size : obj->base.size;



	/* If the object is bigger than the entire aperture, reject it early

	 * before evicting everything in a vain attempt to find space.

	/* If binding the object/GGTT view requires more space than the entire

	 * aperture has, reject it early before evicting everything in a vain

	 * attempt to find space.

	 */

	if (obj->base.size > end) {

		DRM_DEBUG("Attempting to bind an object larger than the aperture: object=%zd > %s aperture=%lu\n",

			  obj->base.size,

	if (size > end) {

		DRM_DEBUG("Attempting to bind an object (view type=%u) larger than the aperture: size=%u > %s aperture=%lu\n",

			  ggtt_view ? ggtt_view->type : 0,

			  size,

			  flags & PIN_MAPPABLE ? "mappable" : "total",

			  end);

		return ERR_PTR(-E2BIG);
@@ -4199,7 +4224,8 @@ i915_gem_object_do_pin(struct drm_i915_gem_object *obj, 
			return ret;

	}



	if ((bound ^ vma->bound) & GLOBAL_BIND) {

	if (ggtt_view && ggtt_view->type == I915_GGTT_VIEW_NORMAL &&

	    (bound ^ vma->bound) & GLOBAL_BIND) {

		bool mappable, fenceable;

		u32 fence_size, fence_alignment;
@@ -4218,9 +4244,9 @@ i915_gem_object_do_pin(struct drm_i915_gem_object *obj, 
			    dev_priv->gtt.mappable_end);



		obj->map_and_fenceable = mappable && fenceable;

	}



		WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable);

	}



	vma->pin_count++;

	return 0;

drivers/gpu/drm/i915/i915_gem_gtt.c

+20 −0
Original line number Diff line number Diff line
@@ -2838,3 +2838,23 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level, 


	return 0;

}



/**

 * i915_ggtt_view_size - Get the size of a GGTT view.

 * @obj: Object the view is of.

 * @view: The view in question.

 *

 * @return The size of the GGTT view in bytes.

 */

size_t

i915_ggtt_view_size(struct drm_i915_gem_object *obj,

		    const struct i915_ggtt_view *view)

{

	if (view->type == I915_GGTT_VIEW_NORMAL ||

	    view->type == I915_GGTT_VIEW_ROTATED) {

		return obj->base.size;

	} else {

		WARN_ONCE(1, "GGTT view %u not implemented!\n", view->type);

		return obj->base.size;

	}

}

drivers/gpu/drm/i915/i915_gem_gtt.h

+4 −0
Original line number Diff line number Diff line
@@ -498,4 +498,8 @@ i915_ggtt_view_equal(const struct i915_ggtt_view *a, 
	return a->type == b->type;

}



size_t

i915_ggtt_view_size(struct drm_i915_gem_object *obj,

		    const struct i915_ggtt_view *view);



#endif