[PATCH v6 0/8] Introduce Xe PCIe FLR

[Raag Jadav <raag.jadav@intel.com>]

Here's my humble attempt at introducing PCIe Function Level Reset (FLR)
support in xe driver. This is ofcourse a half baked implementation and
only limited to re-initializing GT. This needs to be extended for a lot
of components which are expected to be added as a follow up.

Detailed description in commit message and documentation.

PS: All xe_exec_basic tests and clpeak run smoothly after FLR. Give it
a spin and let me know if any regressions.

Trigger it with:

$ echo 1 > /sys/bus/pci/devices/<BDF>/reset

v2: Re-initialize migrate context (Matthew Brost)
    Add kernel doc (Matthew Brost)
    Spell out Function Level Reset (Jani)

v3: Cancel in-flight jobs before FLR

v4: Teardown exec queues instead of mangling scheduler pending list (Matthew Brost)

v5: Re-initialize kernel queues through submission backend (Matthew Brost)
    Prevent PM ref leak for wedged device (Matthew Brost)

v6: Skip uC firmware selection during re-initialization (Daniele)
    Add IS_DGFX() and EXEC_QUEUE_FLAG_KERNEL asserts (Daniele)
    s/flr_done/reinit (Daniele)
    Repurpose system suspend/resume flow for FLR (Daniele)

Raag Jadav (8):
  drm/xe/uc_fw: Allow re-initializing firmware
  drm/xe/guc_submit: Introduce guc_exec_queue_reinit()
  drm/xe/gt: Introduce FLR helpers
  drm/xe/bo_evict: Introduce xe_bo_restore_map()
  drm/xe/exec_queue: Introduce xe_exec_queue_reinit()
  drm/xe/migrate: Introduce xe_migrate_reinit()
  drm/xe/pm: Introduce xe_device_suspend/resume()
  drm/xe/pci: Introduce PCIe FLR

 drivers/gpu/drm/xe/Makefile              |   1 +
 drivers/gpu/drm/xe/xe_bo_evict.c         |  51 ++++++--
 drivers/gpu/drm/xe/xe_bo_evict.h         |   2 +
 drivers/gpu/drm/xe/xe_device.c           | 150 +++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_device.h           |   2 +
 drivers/gpu/drm/xe/xe_device_types.h     |   3 +
 drivers/gpu/drm/xe/xe_exec_queue.c       |  42 ++++++-
 drivers/gpu/drm/xe/xe_exec_queue.h       |   1 +
 drivers/gpu/drm/xe/xe_exec_queue_types.h |   2 +
 drivers/gpu/drm/xe/xe_execlist.c         |   6 +
 drivers/gpu/drm/xe/xe_gpu_scheduler.h    |   5 +
 drivers/gpu/drm/xe/xe_gsc.c              |  14 +++
 drivers/gpu/drm/xe/xe_gsc.h              |   1 +
 drivers/gpu/drm/xe/xe_gt.c               |  48 ++++++++
 drivers/gpu/drm/xe/xe_gt.h               |   2 +
 drivers/gpu/drm/xe/xe_gt_types.h         |   9 ++
 drivers/gpu/drm/xe/xe_guc.c              |  29 +++++
 drivers/gpu/drm/xe/xe_guc.h              |   2 +
 drivers/gpu/drm/xe/xe_guc_submit.c       |  11 ++
 drivers/gpu/drm/xe/xe_huc.c              |  14 +++
 drivers/gpu/drm/xe/xe_huc.h              |   1 +
 drivers/gpu/drm/xe/xe_lrc.c              |  17 +++
 drivers/gpu/drm/xe/xe_lrc.h              |   2 +
 drivers/gpu/drm/xe/xe_migrate.c          |  12 ++
 drivers/gpu/drm/xe/xe_migrate.h          |   1 +
 drivers/gpu/drm/xe/xe_pci.c              |   1 +
 drivers/gpu/drm/xe/xe_pci.h              |   2 +
 drivers/gpu/drm/xe/xe_pci_error.c        | 113 +++++++++++++++++
 drivers/gpu/drm/xe/xe_pm.c               | 103 ++--------------
 drivers/gpu/drm/xe/xe_uc.c               |  39 ++++++
 drivers/gpu/drm/xe/xe_uc.h               |   2 +
 drivers/gpu/drm/xe/xe_uc_fw.c            |  49 ++++++++
 drivers/gpu/drm/xe/xe_uc_fw.h            |   1 +
 33 files changed, 631 insertions(+), 107 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_pci_error.c

-- 
2.43.0