[PATCH v11 0/5] drm/amdgpu: Add WAIT_EVENT ioctl for render-node events

This series introduces a render-node WAIT_EVENT ioctl for
retrieving AMDGPU event records and their associated metadata.

WAIT_EVENT complements the EVENTFD notification interface.
EVENTFD provides lightweight readiness notifications, while
WAIT_EVENT allows userspace to retrieve the corresponding event
type, queue identity, and event-specific metadata.

This series builds on the render-node EVENTFD infrastructure
and the EVENTFD producer series.

The initial producer set records USERQ_EOP and QUEUE_RESET
events by reusing the existing queue resolution and queue reset
handling paths.

Patches
=======

  1. drm/amdgpu/uapi: Add WAIT_EVENT ioctl and metadata structures
  2. drm/amdgpu: Add wait-event manager and per-file lifetime plumbing
  3. drm/amdgpu: Remove queue-scoped WAIT_EVENT records on queue teardown
  4. drm/amdgpu: Record USERQ_EOP WAIT_EVENT notifications
  5. drm/amdgpu: Record QUEUE_RESET WAIT_EVENT notifications

Changes since v10
=================

- Rebased on the latest user queue reset handling changes.
- Updated the QUEUE_RESET producer to reuse the common
  queue-specific reset helper.
- Kept device-level reset accounting and DRM wedged-event
  notification in the top-level recovery paths.

Only compilation tested.

Srinivasan Shanmugam (5):
  drm/amdgpu/uapi: Add WAIT_EVENT ioctl and metadata structures
  drm/amdgpu: Add wait-event manager and per-file lifetime plumbing
  drm/amdgpu: Remove queue-scoped WAIT_EVENT records on queue teardown
  drm/amdgpu: Record USERQ_EOP WAIT_EVENT notifications
  drm/amdgpu: Record QUEUE_RESET WAIT_EVENT notifications

 drivers/gpu/drm/amd/amdgpu/Makefile           |   2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |   5 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c       |   1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c       |   5 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c     |  35 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_userq.h     |   2 +
 .../gpu/drm/amd/amdgpu/amdgpu_wait_event.c    | 508 ++++++++++++++++++
 .../gpu/drm/amd/amdgpu/amdgpu_wait_event.h    | 101 ++++
 include/uapi/drm/amdgpu_drm.h                 | 115 ++++
 9 files changed, 770 insertions(+), 4 deletions(-)
 create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_wait_event.c
 create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_wait_event.h

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2.34.1