drm/i915/guc: Implement parallel context pin / unpin functions

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Parallel contexts are perma-pinned by the upper layers which makes the
backend implementation rather simple. The parent pins the guc_id and
children increment the parent's pin count on pin to ensure all the
contexts are unpinned before we disable scheduling with the GuC / or
deregister the context.

v2:
 (Daniel Vetter)
  - Perma-pin parallel contexts

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211014172005.27155-12-matthew.brost@intel.com

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Matthew Brost 2021-10-14 10:19:51 -07:00 • committed by John Harrison

parent 09c5e3a5e5

commit 99b47aaddf

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drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

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