NV_PFIFO_INTR_DMA_PUSHER
nvkm_wr32(device, 0x002100, NV_PFIFO_INTR_DMA_PUSHER);
if (stat & NV_PFIFO_INTR_DMA_PUSHER) {
stat &= ~NV_PFIFO_INTR_DMA_PUSHER;