nvkm_chan_get_inst
struct nvkm_chan *nvkm_chan_get_inst(struct nvkm_engine *, u64 inst, unsigned long *irqflags);
chan = nvkm_chan_get_inst(cipher, (u64)inst << 12, &flags);
chan = nvkm_chan_get_inst(engine, (u64)inst << 12, &flags);
chan = nvkm_chan_get_inst(&fifo->engine, info->inst, &flags);
chan = nvkm_chan_get_inst(&gr->base.engine, (u64)inst << 12, &flags);
chan = nvkm_chan_get_inst(&gr->base.engine, (u64)inst << 12, &flags);
chan = nvkm_chan_get_inst(&device->fifo->engine, inst, &flags);