[PATCH 0/4] Add support for clear counter and error event in DRM RAS

[Riana Tauro <riana.tauro@intel.com>]

Clear Error Counter : Add clear-error-counter command to DRM RAS to clear
a specific error counter of a node. Implement the callback in XE driver
to demonstrate usage.

Usage with both get-error-counter and clear-error-counter:

$ sudo ynl --family drm_ras  --dump get-error-counter --json '{"node-id":1}'
[{'error-id': 1, 'error-name': 'core-compute', 'error-value': 0},
 {'error-id': 2, 'error-name': 'soc-internal', 'error-value': 3}]

$ sudo ynl --family drm_ras  --do clear-error-counter --json \
'{"node-id":1, "error-id":2}'
None

$ sudo ynl --family drm_ras  --dump get-error-counter --json '{"node-id":1}'
[{'error-id': 1, 'error-name': 'core-compute', 'error-value': 0},
 {'error-id': 2, 'error-name': 'soc-internal', 'error-value': 0}]

Error Event Support:  Introduce `error-event` support in DRM RAS to notify
userspace whenever an error occurs.

Each notification includes the node-id and error-id to identify
the source and type of the error. To receive notifications,
userspace must subscribe to the 'error-notify' multicast group.

Userspace can receive the event by subscribing to multicast group.

$ sudo ynl --family drm_ras --subscribe error-notify
{'msg': {'error-id': 2, 'node-id': 1}, 'name': 'error-event'}

Riana Tauro (4):
  drm/drm_ras: Add clear-error-counter netlink command to drm_ras
  drm/xe/xe_drm_ras: Add support for clear-error-counter in XE DRM RAS
  drm/drm_ras: Add DRM RAS netlink error event notification
  drm/xe/xe_drm_ras: Add error-event support in XE DRM RAS

 Documentation/gpu/drm-ras.rst            | 17 +++++
 Documentation/netlink/specs/drm_ras.yaml | 27 ++++++-
 drivers/gpu/drm/drm_ras.c                | 91 +++++++++++++++++++++++-
 drivers/gpu/drm/drm_ras_nl.c             | 19 +++++
 drivers/gpu/drm/drm_ras_nl.h             |  6 ++
 drivers/gpu/drm/xe/xe_drm_ras.c          | 52 +++++++++++++-
 drivers/gpu/drm/xe/xe_drm_ras.h          |  7 ++
 drivers/gpu/drm/xe/xe_hw_error.c         |  5 ++
 include/drm/drm_ras.h                    | 13 ++++
 include/uapi/drm/drm_ras.h               |  4 ++
 10 files changed, 237 insertions(+), 4 deletions(-)

-- 
2.47.1