[PATCH v5 0/3] Add drm_ras netlink error event support

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

Define a new netlink event 'error-event' and a new multicast group
'error-report' in drm_-as. 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 report to userspace whenever a
correctable/uncorrectable error occurs on 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

Rev4: send an event at most once per component for each interrupt
      add xe_warn for unexpected values from firmware
      fix sashiko reported issues

Rev5: Remove has_listeners
      send netlink event to all network namespaces

Riana Tauro (3):
  drm/drm_ras: Add drm_ras netlink error event
  drm/xe/xe_ras: Report correctable error events to userspace
  drm/xe/xe_ras: Report uncorrectable error events to userspace

 Documentation/gpu/drm-ras.rst            | 21 ++++++
 Documentation/netlink/specs/drm_ras.yaml | 48 ++++++++++++++
 drivers/gpu/drm/drm_ras.c                | 84 ++++++++++++++++++++++++
 drivers/gpu/drm/drm_ras_nl.c             |  6 ++
 drivers/gpu/drm/drm_ras_nl.h             |  4 ++
 drivers/gpu/drm/xe/xe_drm_ras.c          | 42 ++++++++++++
 drivers/gpu/drm/xe/xe_drm_ras.h          |  3 +
 drivers/gpu/drm/xe/xe_ras.c              | 74 +++++++++++++++++++++
 include/drm/drm_ras.h                    |  5 ++
 include/uapi/drm/drm_ras.h               | 15 +++++
 10 files changed, 302 insertions(+)

-- 
2.47.1