drm/xe: Add ULLS migration job support to GuC submission

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Add ULLS migration job support to GuC submission backend.

Changes required:
- On migration queue, reduce max jobs to the number of ULLS semaphores
  minus one
- Skip writing the saved ring tail for ULLS jobs except for the first
  ULLS job - the ring updates both the saved tail and the tail register
  itself
- Set ULLS sempahore for current job releasing last job except for first
  ULLS job
- Suppress submit H2G for ULLS except for first ULLS job

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Maarten Lankhorst <dev@lankhorst.se>
Link: https://patch.msgid.link/20260925201526.1355279-22-matthew.brost@intel.com

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This commit is contained in:

Matthew Brost 2026-09-25 13:15:23 -07:00

parent 6ec0b87160

commit 40c756bdbb

1 changed files with 13 additions and 4 deletions

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drivers/gpu/drm/xe/xe_guc_submit.c

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