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

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
......@@ -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;
......
......@@ -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;
}
}
......@@ -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
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