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| author | Ben Widawsky <ben@bwidawsk.net> | 2013-07-31 17:00:08 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-08-06 20:14:46 +0200 |
| commit | 0b02e798ffec99b51f2fe931ceb61ca0d22d2a70 (patch) | |
| tree | 38c7b190952ae80ea9e550b02898228dcfa6949f /drivers/gpu | |
| parent | ddfe15677d9c47f2491e401cd773b45e1aac74bf (diff) | |
| download | lwn-0b02e798ffec99b51f2fe931ceb61ca0d22d2a70.tar.gz lwn-0b02e798ffec99b51f2fe931ceb61ca0d22d2a70.zip | |
drm/i915: Improve VMA comments
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 290c12dd6e6b..4f93467fdfdd 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -545,7 +545,12 @@ struct i915_hw_ppgtt { 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. */ struct i915_vma { |