topo_method_call
rc = topo_method_call(node, method, version, in, out, err);
extern int topo_method_call(tnode_t *, const char *, topo_version_t, nvlist_t *,
if (topo_method_call(node, pm->tpm_name, pm->tpm_version,
ret = topo_method_call(node, pm->tpm_name, pm->tpm_version,