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@@ -545,7 +545,12 @@ struct i915_hw_ppgtt {
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int (*enable)(struct drm_device *dev);
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};
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-/* To make things as simple as possible (ie. no refcounting), a VMA's lifetime
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+/**
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+ * A VMA represents a GEM BO that is bound into an address space. Therefore, a
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+ * VMA's presence cannot be guaranteed before binding, or after unbinding the
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+ * object into/from the address space.
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+ *
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+ * To make things as simple as possible (ie. no refcounting), a VMA's lifetime
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* will always be <= an objects lifetime. So object refcounting should cover us.
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*/
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struct i915_vma {
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