+/* Configure the Rx and Tx hairpin queues for the selected port. */
+static int
+setup_hairpin_queues(portid_t pi)
+{
+ queueid_t qi;
+ struct rte_eth_hairpin_conf hairpin_conf = {
+ .peer_count = 1,
+ };
+ int i;
+ int diag;
+ struct rte_port *port = &ports[pi];
+
+ for (qi = nb_txq, i = 0; qi < nb_hairpinq + nb_txq; qi++) {
+ hairpin_conf.peers[0].port = pi;
+ hairpin_conf.peers[0].queue = i + nb_rxq;
+ diag = rte_eth_tx_hairpin_queue_setup
+ (pi, qi, nb_txd, &hairpin_conf);
+ i++;
+ if (diag == 0)
+ continue;
+
+ /* Fail to setup rx queue, return */
+ if (rte_atomic16_cmpset(&(port->port_status),
+ RTE_PORT_HANDLING,
+ RTE_PORT_STOPPED) == 0)
+ printf("Port %d can not be set back "
+ "to stopped\n", pi);
+ printf("Fail to configure port %d hairpin "
+ "queues\n", pi);
+ /* try to reconfigure queues next time */
+ port->need_reconfig_queues = 1;
+ return -1;
+ }
+ for (qi = nb_rxq, i = 0; qi < nb_hairpinq + nb_rxq; qi++) {
+ hairpin_conf.peers[0].port = pi;
+ hairpin_conf.peers[0].queue = i + nb_txq;
+ diag = rte_eth_rx_hairpin_queue_setup
+ (pi, qi, nb_rxd, &hairpin_conf);
+ i++;
+ if (diag == 0)
+ continue;
+
+ /* Fail to setup rx queue, return */
+ if (rte_atomic16_cmpset(&(port->port_status),
+ RTE_PORT_HANDLING,
+ RTE_PORT_STOPPED) == 0)
+ printf("Port %d can not be set back "
+ "to stopped\n", pi);
+ printf("Fail to configure port %d hairpin "
+ "queues\n", pi);
+ /* try to reconfigure queues next time */
+ port->need_reconfig_queues = 1;
+ return -1;
+ }
+ return 0;
+}
+