nvkm_vmm_ptes_get
ret = nvkm_vmm_ptes_get(vmm, page, vma->addr, vma->size);
return nvkm_vmm_ptes_get(vmm, &page[refd], addr, size);
ret = nvkm_vmm_ptes_get(vmm, page, vmm->start, limit);
ret = nvkm_vmm_ptes_get(vmm, page, addr, size);