[PATCH 2/2] drm/amdgpu/userq: implement support for query status

From: Alex Deucher <[email protected]>

Query the status of the user queue, currently whether
the queue is hung and whether or not VRAM is lost.

v2: Misc cleanups

Reviewed-by: Prike Liang <[email protected]>
Reviewed-by: Sunil Khatri <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Prike Liang <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c | 33 +++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
index bcfbd7213dd6..911b4abfd126 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
@@ -799,6 +799,33 @@ amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args)
 	return r;
 }
 
+static int
+amdgpu_userq_query_status(struct drm_file *filp, union drm_amdgpu_userq *args)
+{
+	struct amdgpu_fpriv *fpriv = filp->driver_priv;
+	struct amdgpu_userq_mgr *uq_mgr = &fpriv->userq_mgr;
+	struct amdgpu_device *adev = uq_mgr->adev;
+	struct amdgpu_usermode_queue *queue;
+	int queue_id = args->in.queue_id;
+
+	mutex_lock(&uq_mgr->userq_mutex);
+
+	queue = amdgpu_userq_find(uq_mgr, queue_id);
+	if (!queue) {
+		dev_dbg(adev->dev, "Invalid queue id to query\n");
+		mutex_unlock(&uq_mgr->userq_mutex);
+		return -EINVAL;
+	}
+	args->out_qs.flags = 0;
+	if (queue->state == AMDGPU_USERQ_STATE_HUNG)
+		args->out_qs.flags |= AMDGPU_USERQ_QUERY_STATUS_FLAGS_HUNG;
+	if (queue->generation != amdgpu_vm_generation(adev, &fpriv->vm))
+		args->out_qs.flags |= AMDGPU_USERQ_QUERY_STATUS_FLAGS_VRAMLOST;
+	mutex_unlock(&uq_mgr->userq_mutex);
+
+	return 0;
+}
+
 static int amdgpu_userq_input_args_validate(struct drm_device *dev,
 					union drm_amdgpu_userq *args,
 					struct drm_file *filp)
@@ -914,6 +941,12 @@ int amdgpu_userq_ioctl(struct drm_device *dev, void *data,
 		break;
 	}
 
+	case AMDGPU_USERQ_OP_QUERY_STATUS:
+		r = amdgpu_userq_query_status(filp, args);
+		if (r)
+			drm_dbg_driver(dev, "Failed to query usermode queue status\n");
+		break;
+
 	default:
 		drm_dbg_driver(dev, "Invalid user queue op specified: %d\n", args->in.op);
 		return -EINVAL;
-- 
2.34.1