[PATCH v10 5/5] drm/amdgpu: Record QUEUE_RESET WAIT_EVENT notifications

The queue reset path already resolves the affected queue directly from
the doorbell and funnels successful reset handling through
amdgpu_userq_handle_hung_queue(). Reuse that common handling point to
create the corresponding WAIT_EVENT record.

Keeping the notification in the common helper ensures that queue state
is updated before userspace is notified and that both EVENTFD and
WAIT_EVENT observe the same reset. It also avoids duplicating the
doorbell lookup or adding a queue scan in the MES reset path.

No MES or GFX interrupt changes are needed.

Changes since v9:
- Document the existing USERQ-before-postclose teardown ordering in the
  WAIT_EVENT manager patch to clarify the manager lifetime used by this
  reset producer.

Signed-off-by: Srinivasan Shanmugam <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
index 28f9d3fe0e80..37be0414fea7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
@@ -166,6 +166,7 @@ void amdgpu_userq_handle_hung_queue(struct amdgpu_device *adev,
 			            struct amdgpu_usermode_queue *queue)
 {
 	struct amdgpu_eventfd_mgr *eventfd_mgr;
+	struct amdgpu_wait_event_mgr *wait_event_mgr;
 
 	queue->state = AMDGPU_USERQ_STATE_HUNG;
 	atomic_inc(&adev->gpu_reset_counter);
@@ -177,6 +178,11 @@ void amdgpu_userq_handle_hung_queue(struct amdgpu_device *adev,
 			      DRM_AMDGPU_EVENT_TYPE_QUEUE_RESET,
 			      queue);
 
+	wait_event_mgr = amdgpu_userq_wait_event_mgr(queue->userq_mgr);
+	amdgpu_wait_event_add(wait_event_mgr,
+			      DRM_AMDGPU_EVENT_TYPE_QUEUE_RESET,
+			      queue);
+
 	drm_dev_wedged_event(adev_to_drm(adev),
 			     DRM_WEDGE_RECOVERY_NONE, NULL);
 }
-- 
2.34.1