Define a new netlink event 'error-event' and a new multicast group
'error-report' in drm_ras. Each event contains device name, node and
error information to identify the error triggering the event.

Add drm_ras_nl_error_event() to trigger an event from the driver.
Wire this support to xe drm_ras to notify userspace whenever a GT or
SoC error occurs in PVC. Also add support for correctable errors in
CRI.

$ sudo ynl --family drm_ras --output-json --subscribe error-report

{
    "name": "error-event",
     "msg": {
         "device-name": "0000:03:00.0",
         "node-id": 1,
         "node-name": "uncorrectable-errors",
         "error-id": 1,
         "error-name": "core-compute",
         "error-value": 1
     }
}

Rev2: use ynl in document and commit message
      fix cosmetic review comments
      simplify caller 

Rev3: replace error-event with error-report
      had has_drm_ras check 
      add support for correctable errors in CRI

Riana Tauro (3):
  drm/drm_ras: Add drm_ras netlink error event
  drm/xe/xe_drm_ras: Add error-event support for PVC
  drm/xe/xe_ras: Add error-event support for Crescent Island

 Documentation/gpu/drm-ras.rst            | 21 ++++++
 Documentation/netlink/specs/drm_ras.yaml | 48 +++++++++++++
 drivers/gpu/drm/drm_ras.c                | 87 ++++++++++++++++++++++++
 drivers/gpu/drm/drm_ras_nl.c             |  6 ++
 drivers/gpu/drm/drm_ras_nl.h             |  4 ++
 drivers/gpu/drm/xe/xe_drm_ras.c          | 30 ++++++++
 drivers/gpu/drm/xe/xe_drm_ras.h          |  3 +
 drivers/gpu/drm/xe/xe_hw_error.c         |  5 +-
 drivers/gpu/drm/xe/xe_ras.c              | 53 +++++++++++++++
 include/drm/drm_ras.h                    |  5 ++
 include/uapi/drm/drm_ras.h               | 15 ++++
 11 files changed, 276 insertions(+), 1 deletion(-)

-- 
2.47.1