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drm/i915: Do not clear mappings beyond VMA size

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Do not to clear mappings outside the allocated VMA under any
circumstances. Only clear the smaller of VMA or object page count.

This is required to allow creating partial object VMAs which in
turn are needed for partial GGTT views.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Joonas Lahtinen 2015-04-24 15:09:03 +03:00 committed by Daniel Vetter
parent 09b1eb130e
commit 06615ee5c5
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -1945,19 +1945,23 @@ static void ggtt_unbind_vma(struct i915_vma *vma)
struct drm_device *dev = vma->vm->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj = vma->obj;
const uint64_t size = min_t(uint64_t,
obj->base.size,
vma->node.size);
if (vma->bound & GLOBAL_BIND) {
vma->vm->clear_range(vma->vm,
vma->node.start,
obj->base.size,
size,
true);
}
if (dev_priv->mm.aliasing_ppgtt && vma->bound & LOCAL_BIND) {
struct i915_hw_ppgtt *appgtt = dev_priv->mm.aliasing_ppgtt;
appgtt->base.clear_range(&appgtt->base,
vma->node.start,
obj->base.size,
size,
true);
}
}