drm/i915/guc: Assign contexts in parent-child relationship consecutive guc_ids

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Assign contexts in parent-child relationship consecutive guc_ids. This
is accomplished by partitioning guc_id space between ones that need to
be consecutive (1/16 available guc_ids) and ones that do not (15/16 of
available guc_ids). The consecutive search is implemented via the bitmap
API.

This is a precursor to the full GuC multi-lrc implementation but aligns
to how GuC mutli-lrc interface is defined - guc_ids must be consecutive
when using the GuC multi-lrc interface.

v2:
 (Daniel Vetter)
  - Explicitly state why we assign consecutive guc_ids
v3:
 (John Harrison)
  - Bring back in spin lock

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/20211014172005.27155-11-matthew.brost@intel.com

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Matthew Brost 2021-10-14 10:19:50 -07:00 • committed by John Harrison

parent 44d25fec1a

commit 09c5e3a5e5

2 changed files with 86 additions and 24 deletions

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6

drivers/gpu/drm/i915/gt/uc/intel_guc.h

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104

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

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