drm/i915/gtt: Setup phys pages for 3lvl pdps

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If we setup backing phys page for 3lvl pdps, as they
are not used, we will lose 5 pages per ppgtt.

Trading this memory on bsw, we gain more common code paths for all
gen8+ directory manipulation. And those paths are now void of checks
for page directory type, making the hot paths faster.

v2: don't shortcut vm (Chris)

Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190705215204.4559-3-chris@chris-wilson.co.uk

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Mika Kuoppala 2019-07-05 22:52:03 +01:00 • committed by Chris Wilson

parent 72230b874a

commit 73a8fdef5d

1 changed files with 50 additions and 27 deletions

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drivers/gpu/drm/i915/i915_gem_gtt.c

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