[PATCH v4 00/34] 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, job resubmission, and
  compressd memory.

- A new test [2] that actively creates / destroys queue on each
  submission

- 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".

v2:
 - Fix lockdep splat
 - Fix checkpatch
 - Fix PTL issue with LRC W/A buffer
 - Fix race creating / destroying queues across migration exposed by [2]
 - Include a version of Satya's patches in [3] which enable CCS save /
   restore across VF migration /w GGTT shift
v3:
 - Address feedback
 - Fix preempt fence mode deadlock /w work queues + VF recovery (Testing)
 - Add NULL checks to scratch LRC allocation
v4:
 - Fix CI failure
 - Remove config lock

Matt

[1] https://patchwork.freedesktop.org/series/154616/ 
[2] https://patchwork.freedesktop.org/series/154931/
[3] https://patchwork.freedesktop.org/series/154682/

Matthew Brost (32):
  drm/xe: Add NULL checks to scratch LRC allocation
  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: Make LRC W/A scratch buffer usage consistent
  drm/xe/guc: Document GuC submission backend
  drm/xe/vf: Add xe_gt_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: Avoid indefinite blocking in preempt rebind worker for VFs
    supporting migration
  drm/xe/vf: Use GUC_HXG_TYPE_EVENT for GuC context register
  drm/xe/vf: Flush and stop 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
  drm/xe/vf: Use primary GT ordered work queue on media GT on PTL VF
  drm/xe/vf: Ensure media GT VF recovery runs after primary GT on PTL
  drm/xe/vf: Rebase CCS save/restore BB GGTT addresses

Satyanarayana K V P (2):
  drm/xe: Use PPGTT addresses for TLB invalidation to avoid GGTT fixups
  drm/xe/guc: Increase wait timeout to 2sec after BUSY reply from GuC

 Documentation/gpu/xe/index.rst               |   1 +
 drivers/gpu/drm/xe/abi/guc_actions_abi.h     |   8 -
 drivers/gpu/drm/xe/xe_device_types.h         |   5 +
 drivers/gpu/drm/xe/xe_exec.c                 |  12 +-
 drivers/gpu/drm/xe/xe_exec_queue.c           |  86 +-
 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                   |  37 +-
 drivers/gpu/drm/xe/xe_gt.h                   |  15 +-
 drivers/gpu/drm/xe/xe_gt_sriov_vf.c          | 465 ++++++++---
 drivers/gpu/drm/xe/xe_gt_sriov_vf.h          |  13 +-
 drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h    |  33 +-
 drivers/gpu/drm/xe/xe_guc.c                  |   4 +-
 drivers/gpu/drm/xe/xe_guc_ct.c               | 304 +++----
 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           | 834 +++++++++++++++----
 drivers/gpu/drm/xe/xe_guc_submit.h           |   7 +-
 drivers/gpu/drm/xe/xe_lrc.c                  |  12 +-
 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               |   2 +
 drivers/gpu/drm/xe/xe_migrate.c              |  28 +-
 drivers/gpu/drm/xe/xe_pci.c                  |   6 +-
 drivers/gpu/drm/xe/xe_pci_types.h            |   1 +
 drivers/gpu/drm/xe/xe_preempt_fence.c        |  11 +
 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_vf.c             | 243 ------
 drivers/gpu/drm/xe/xe_sriov_vf.h             |   1 -
 drivers/gpu/drm/xe/xe_sriov_vf_ccs.c         |  28 +
 drivers/gpu/drm/xe/xe_sriov_vf_ccs.h         |   1 +
 drivers/gpu/drm/xe/xe_sriov_vf_types.h       |   4 -
 drivers/gpu/drm/xe/xe_tile.c                 |   2 +-
 drivers/gpu/drm/xe/xe_tile_sriov_vf.c        |  30 +-
 drivers/gpu/drm/xe/xe_tile_sriov_vf.h        |   2 +-
 drivers/gpu/drm/xe/xe_tile_sriov_vf_types.h  |  23 +
 drivers/gpu/drm/xe/xe_vm.c                   |  26 +-
 drivers/gpu/drm/xe/xe_vram.c                 |   6 +-
 42 files changed, 1513 insertions(+), 887 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_tile_sriov_vf_types.h

-- 
2.34.1