drm/i915: Provide a cheap ggtt vma lookup

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"We do fairly often lookup the ggtt vma for an obj." - Chris Wilson. As
such, provide a function to offer slightly cheaper access to the vma.
Not performance tested. By my quick estimation it saves at least 3
pointer dereferences from the existing mechanism.

This patch mostly matches code from Chris in
<20130911221430.GB7825@nuc-i3427.alporthouse.com>

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ben Widawsky 2013-09-24 09:57:57 -07:00 • committed by Daniel Vetter

parent bcccff847d

commit 5c2abbeab7

2 changed files with 18 additions and 3 deletions

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4

drivers/gpu/drm/i915/i915_drv.h

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17

drivers/gpu/drm/i915/i915_gem.c

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