nvkm_gsp_sg
int nvkm_gsp_sg(struct nvkm_device *, u64 size, struct sg_table *);
ret = nvkm_gsp_sg(gsp->subdev.device, fbsr.size, &gsp->sr.fbsr);
ret = nvkm_gsp_sg(gsp->subdev.device, bufsize, &rx3->lvl2);
ret = nvkm_gsp_sg(gsp->subdev.device, len, &gsp->sr.sgt);
ret = nvkm_gsp_sg(device, size, &gsp->sr.fbsr);