[PATCH v4 0/4] drm/xe/vf: Fix exec queue creation during post-migration recovery

[Tomasz Lis <tomasz.lis@intel.com>]

Fix a few issues which sporadically happen due to a race between
post-migration fixups procedure, and exec queue creation routine.

Tests which create a lot of exec queues were sporadically failing
due to one of LRCs having its state within VRAM damaged. This series
fixes all such issues, by prolonging wait for fixups within EQ
creation, and also re-creating the one LRC whose creation happened
at the time of VF switch.

v2: Add a patch with atomic value increase which allowed to solve the
  few very rare test fails which were still happening.

v3: Reuse _xe_exec_queue_fini(). Add setter and getter for LRC
  references. Move fixups confirmation forwardr in time. Refactor
  changes to __xe_exec_queue_init().

v4: Separate lock, only for LRCs. Kerneldoc fixes. Rename
  fixups_complete_count.

Signed-off-by: Tomasz Lis <tomasz.lis@intel.com>

Tomasz Lis (4):
  drm/xe/queue: Call fini on exec queue creation fail
  drm/xe: Wrappers for setting and getting LRC references
  drm/xe/vf: Wait for all fixups before using default LRCs
  drm/xe/vf: Redo LRC creation while in VF fixups

 drivers/gpu/drm/xe/xe_exec_queue.c        | 123 +++++++++++++++-------
 drivers/gpu/drm/xe/xe_exec_queue.h        |   1 +
 drivers/gpu/drm/xe/xe_exec_queue_types.h  |   5 +
 drivers/gpu/drm/xe/xe_gt_sriov_vf.c       |  54 ++++++++--
 drivers/gpu/drm/xe/xe_gt_sriov_vf.h       |   3 +-
 drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h |   4 +-
 drivers/gpu/drm/xe/xe_lrc.h               |   3 +-
 7 files changed, 141 insertions(+), 52 deletions(-)

-- 
2.25.1