r535_gsp_msg_recv
r535_gsp_msg_recv(gsp, 0, 0);
repv = r535_gsp_msg_recv(gsp, fn, 0);
reply = r535_gsp_msg_recv(gsp, fn, gsp_rpc_len);
repv = r535_gsp_msg_recv(gsp, fn, 0);
struct nvfw_gsp_rpc *r535_gsp_msg_recv(struct nvkm_gsp *, int fn, u32 gsp_rpc_len);