[PATCH v2 0/6] Only timeout jobs if they run longer than timeout period

[Matthew Brost <matthew.brost@intel.com>]

Debugging [1] hit a known flaw in the job timeout mechanism - jobs
timeout after a period of time in which they have been submitted to the
GuC not how long they have actually been running on the hardware.
Attempt to fix this.

Algorithm is as follows:
- Copy ctx timestamp from LRC to saved location at beginning of every
  job
- On TDR kick jobs off hardware via schedule disable so ctx timestamp is
  updated
- Compare ctx timestamp to saved ctx timestamp, if jobs having been
  running less than timeout period re-enable scheduling are restart TDR

New job cancel IGT [2] for testing.

v2:
- Promote to non-RFC as issues which I view as blockers have been resolved
- Address Jani and Michal v1 feedback
- Add GT clock timer calculation

Matt

[1] https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/799
[2] https://patchwork.freedesktop.org/series/134637/

Matthew Brost (6):
  drm/xe: Add LRC ctx timestamp support functions
  drm/xe: Add MI_COPY_MEM_MEM GPU instruction definitions
  drm/xe: Emit ctx timestamp copy in ring ops
  drm/xe: Add ctx timestamp to LRC snapshot
  drm/xe: Add xe_gt_clock_interval_to_ms helper
  drm/xe: Sample ctx timestamp to determine if jobs have timed out

 .../gpu/drm/xe/instructions/xe_mi_commands.h  |   4 +
 drivers/gpu/drm/xe/xe_gt_clock.c              |  18 +++
 drivers/gpu/drm/xe/xe_gt_clock.h              |   1 +
 drivers/gpu/drm/xe/xe_guc_submit.c            | 153 ++++++++++++++----
 drivers/gpu/drm/xe/xe_lrc.c                   |  72 +++++++++
 drivers/gpu/drm/xe/xe_lrc.h                   |   5 +
 drivers/gpu/drm/xe/xe_ring_ops.c              |  21 +++
 7 files changed, 241 insertions(+), 33 deletions(-)

-- 
2.34.1