drm/i915: Combine multiple internal plists into the same i915_priolist bucket

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As we are about to allow ourselves to slightly bump the user priority
into a few different sublevels, packthose internal priority lists
into the same i915_priolist to keep the rbtree compact and avoid having
to allocate the default user priority even after the internal bumping.
The downside to having an requests[] rather than a node per active list,
is that we then have to walk over the empty higher priority lists. To
compensate, we track the active buckets and use a small bitmap to skip
over any inactive ones.

v2: Use MASK of internal levels to simplify our usage.
v3: Prevent overflow when SHIFT is zero.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001123204.23982-4-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2018-10-01 13:32:04 +01:00

parent 7651a4452d

commit 85f5e1f385

4 changed files with 80 additions and 38 deletions

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6

drivers/gpu/drm/i915/intel_engine_cs.c

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12

drivers/gpu/drm/i915/intel_guc_submission.c

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87

drivers/gpu/drm/i915/intel_lrc.c

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13

drivers/gpu/drm/i915/intel_ringbuffer.h

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