drm/i915: Always preallocate gen6/7 ppgtt

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The hardware does not cope very well with us changing the PD within an
active context (the context must be idle for it to re-read the PD). As
we only check whether the page is idle before changing the entry (and on
through the PD tree), we cannot reliably replace PD entries on
gen6/gen7. To fully avoid changing the tree at runtime, preallocate it
on init.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215084357.19977-9-chris@chris-wilson.co.uk

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Chris Wilson 2017-02-15 08:43:43 +00:00

parent ff685975d9

commit 52c126ee90

1 changed files with 14 additions and 10 deletions

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drivers/gpu/drm/i915/i915_gem_gtt.c

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