Commit 0b02e798 authored by Ben Widawsky's avatar Ben Widawsky Committed by Daniel Vetter

drm/i915: Improve VMA comments

Signed-off-by: default avatarBen Widawsky <ben@bwidawsk.net>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent ddfe1567
...@@ -545,7 +545,12 @@ struct i915_hw_ppgtt { ...@@ -545,7 +545,12 @@ struct i915_hw_ppgtt {
int (*enable)(struct drm_device *dev); int (*enable)(struct drm_device *dev);
}; };
/* To make things as simple as possible (ie. no refcounting), a VMA's lifetime /**
* A VMA represents a GEM BO that is bound into an address space. Therefore, a
* VMA's presence cannot be guaranteed before binding, or after unbinding the
* object into/from the address space.
*
* To make things as simple as possible (ie. no refcounting), a VMA's lifetime
* will always be <= an objects lifetime. So object refcounting should cover us. * will always be <= an objects lifetime. So object refcounting should cover us.
*/ */
struct i915_vma { struct i915_vma {
......
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