NV03_PFIFO_INTR_EN_0
u32 mask = nvkm_rd32(device, NV03_PFIFO_INTR_EN_0);
nvkm_mask(device, NV03_PFIFO_INTR_EN_0, stat, 0x00000000);
nvkm_wr32(device, NV03_PFIFO_INTR_EN_0, 0xffffffff);
nvkm_wr32(device, NV03_PFIFO_INTR_EN_0, 0xffffffff);
nvkm_wr32(device, NV03_PFIFO_INTR_EN_0, 0xffffffff);