CSF_DOORBELL
gpu_write(ptdev, CSF_DOORBELL(CSF_GLB_DOORBELL_ID), 1);
gpu_write(ptdev, CSF_DOORBELL(CSF_GLB_DOORBELL_ID), 1);
gpu_write(ptdev, CSF_DOORBELL(CSF_GLB_DOORBELL_ID), 1);
gpu_write(ptdev, CSF_DOORBELL(CSF_GLB_DOORBELL_ID), 1);
gpu_write(ptdev, CSF_DOORBELL(queue->doorbell_id), 1);