[PATCH 00/28] VF migration redesign

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

Rather than modifying buffers in place using GGTT addresses during VF
migration, this approach relies on the submission backend's stop/start
mechanism to issue fixups. The patch titled "Document GuC Submission
Backend" provides a detailed explanation of the design.

Testing was performed using an out-of-tree PF/VFIO driver with manual
triggering of VF migration while IGT test cases are running.

IGT test cases:

- A new series [1] that exercises active contexts and job resubmission.

- xe_exec_threads basic sections, which test context registration loss,
  schedule enable loss, and job resubmission.

- xe_exec_threads balancer sections, which follow the same flows as the 
  basic sections but include a work queue (GGTT address shift).

- xe_exec_threads compute mode user pointer invalidation sections, which
  exercise the same flow as the basic sections, plus replaying
  suspend/resume flows.

All code paths in "Replay GuC submission state on pause/unpause" that
replay state have been manually verified via debug messages "Add debug
prints for GuC replaying state during VF recovery".

Matt

[1] https://patchwork.freedesktop.org/series/154616/ 

Matthew Brost (27):
  Revert "drm/xe/vf: Rebase exec queue parallel commands during
    migration recovery"
  Revert "drm/xe/vf: Post migration, repopulate ring area for pending
    request"
  Revert "drm/xe/vf: Fixup CTB send buffer messages after migration"
  drm/xe: Save off position in ring in which a job was programmed
  drm/xe/guc: Track pending-enable source in submission state
  drm/xe: Track LR jobs in DRM scheduler pending list
  drm/xe: Don't change LRC ring head on job resubmission
  drm/xe/guc: Document GuC submission backend
  drm/xe/vf: Add xe_gt_sriov_vf_recovery_inprogress helper
  drm/xe/vf: Make VF recovery run on per-GT worker
  drm/xe/vf: Abort H2G sends during VF post-migration recovery
  drm/xe/vf: Remove memory allocations from VF post migration recovery
  drm/xe/vf: Close multi-GT GGTT shift race
  drm/xe/vf: Teardown VF post migration worker on driver unload
  drm/xe/vf: Don't allow GT reset to be queued during VF post migration
    recovery
  drm/xe/vf: Wakeup in GuC backend on VF post migration recovery
  drm/xe/vf: Extra debug on GGTT shift
  drm/xe/vf: Use GUC_HXG_TYPE_EVENT for GuC context register
  drm/xe/vf: Stop and flush CTs in VF post migration recovery
  drm/xe/vf: Reset TLB invalidations during VF post migration recovery
  drm/xe/vf: Kickstart after resfix in VF post migration recovery
  drm/xe/vf: Start CTs before resfix VF post migration recovery
  drm/xe/vf: Abort VF post migration recovery on failure
  drm/xe/vf: Replay GuC submission state on pause / unpause
  drm/xe: Move queue init before LRC creation
  drm/xe/vf: Add debug prints for GuC replaying state during VF recovery
  drm/xe/vf: Workaround for race condition in GuC firmware during VF
    pause

Tomasz Lis (1):
  drm/xe/vf: Lock querying GGTT config during driver init

 Documentation/gpu/xe/index.rst               |   1 +
 drivers/gpu/drm/xe/abi/guc_actions_abi.h     |   8 -
 drivers/gpu/drm/xe/xe_exec.c                 |  12 +-
 drivers/gpu/drm/xe/xe_exec_queue.c           |  81 +-
 drivers/gpu/drm/xe/xe_exec_queue.h           |   5 +-
 drivers/gpu/drm/xe/xe_execlist.c             |   2 +-
 drivers/gpu/drm/xe/xe_gpu_scheduler.c        |  14 +
 drivers/gpu/drm/xe/xe_gpu_scheduler.h        |   2 +
 drivers/gpu/drm/xe/xe_gt.c                   |   9 -
 drivers/gpu/drm/xe/xe_gt_sriov_vf.c          | 362 +++++++--
 drivers/gpu/drm/xe/xe_gt_sriov_vf.h          |   8 +-
 drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h    |  31 +-
 drivers/gpu/drm/xe/xe_guc.c                  |   2 +-
 drivers/gpu/drm/xe/xe_guc_ct.c               | 282 ++-----
 drivers/gpu/drm/xe/xe_guc_ct.h               |   4 +-
 drivers/gpu/drm/xe/xe_guc_exec_queue_types.h |  15 +
 drivers/gpu/drm/xe/xe_guc_submit.c           | 790 +++++++++++++++----
 drivers/gpu/drm/xe/xe_guc_submit.h           |   7 +-
 drivers/gpu/drm/xe/xe_lrc.h                  |  10 +
 drivers/gpu/drm/xe/xe_map.h                  |  18 -
 drivers/gpu/drm/xe/xe_memirq.c               |  48 +-
 drivers/gpu/drm/xe/xe_memirq.h               |   3 +
 drivers/gpu/drm/xe/xe_ring_ops.c             |  23 +-
 drivers/gpu/drm/xe/xe_sched_job_types.h      |   9 +
 drivers/gpu/drm/xe/xe_sriov.c                |   8 +-
 drivers/gpu/drm/xe/xe_sriov_vf.c             | 243 +-----
 drivers/gpu/drm/xe/xe_sriov_vf.h             |   3 +-
 drivers/gpu/drm/xe/xe_sriov_vf_types.h       |   4 -
 drivers/gpu/drm/xe/xe_tile_sriov_vf.c        |   6 +-
 drivers/gpu/drm/xe/xe_tile_sriov_vf.h        |   1 -
 30 files changed, 1232 insertions(+), 779 deletions(-)

-- 
2.34.1