Re: [PATCH v12 0/5] drm/amdgpu: Add WAIT_EVENT ioctl for render-node events

Series is:
Reviewed-by: Alex Deucher <[email protected]>

On Thu, Jul 16, 2026 at 9:21 AM Srinivasan Shanmugam
<[email protected]> wrote:
>
> This series introduces a render-node WAIT_EVENT ioctl for retrieving
> AMDGPU event records and associated metadata.
>
> WAIT_EVENT complements the EVENTFD notification interface. EVENTFD
> provides lightweight readiness notification, while WAIT_EVENT allows
> userspace to retrieve the corresponding event record and associated
> metadata.
>
> This series builds on the previously proposed render-node EVENTFD
> infrastructure and adds WAIT_EVENT support together with USERQ_EOP and
> QUEUE_RESET event producers.
>
> Changes since v11:
> - Use an unsigned absolute CLOCK_MONOTONIC deadline for WAIT_EVENT.
> - Preserve zero timeout semantics as an immediate check-and-return.
> - Remove the special handling for indefinite waits.
> - Improve kerneldoc for timeout handling and WAIT_EVENT manager
>   lifetime.
> - Clarify the existing teardown ordering that guarantees the embedded
>   WAIT_EVENT manager remains valid while USERQ producers are active.
> - Address review comments from Christian.
>
> 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    | 490 ++++++++++++++++++
>  .../gpu/drm/amd/amdgpu/amdgpu_wait_event.h    | 101 ++++
>  include/uapi/drm/amdgpu_drm.h                 | 114 ++++
>  9 files changed, 751 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
>
> --
> 2.34.1
>