1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2015 Intel Corporation
8 #include <rte_ethdev.h>
9 #include <rte_cycles.h>
10 #include <rte_lcore.h>
13 #define RX_RING_SIZE 128
14 #define TX_RING_SIZE 512
16 #define NUM_MBUFS 8191
17 #define MBUF_CACHE_SIZE 250
20 static const struct rte_eth_conf port_conf_default = {
21 .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
24 /* basicfwd.c: Basic DPDK skeleton forwarding example. */
27 * Initializes a given port using global settings and with the RX buffers
28 * coming from the mbuf_pool passed as a parameter.
31 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
33 struct rte_eth_conf port_conf = port_conf_default;
34 const uint16_t rx_rings = 1, tx_rings = 1;
35 uint16_t nb_rxd = RX_RING_SIZE;
36 uint16_t nb_txd = TX_RING_SIZE;
40 if (port >= rte_eth_dev_count())
43 /* Configure the Ethernet device. */
44 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
48 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
52 /* Allocate and set up 1 RX queue per Ethernet port. */
53 for (q = 0; q < rx_rings; q++) {
54 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
55 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
60 /* Allocate and set up 1 TX queue per Ethernet port. */
61 for (q = 0; q < tx_rings; q++) {
62 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
63 rte_eth_dev_socket_id(port), NULL);
68 /* Start the Ethernet port. */
69 retval = rte_eth_dev_start(port);
73 /* Display the port MAC address. */
74 struct ether_addr addr;
75 rte_eth_macaddr_get(port, &addr);
76 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
77 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
79 addr.addr_bytes[0], addr.addr_bytes[1],
80 addr.addr_bytes[2], addr.addr_bytes[3],
81 addr.addr_bytes[4], addr.addr_bytes[5]);
83 /* Enable RX in promiscuous mode for the Ethernet device. */
84 rte_eth_promiscuous_enable(port);
90 * The lcore main. This is the main thread that does the work, reading from
91 * an input port and writing to an output port.
93 static __attribute__((noreturn)) void
96 const uint16_t nb_ports = rte_eth_dev_count();
100 * Check that the port is on the same NUMA node as the polling thread
101 * for best performance.
103 for (port = 0; port < nb_ports; port++)
104 if (rte_eth_dev_socket_id(port) > 0 &&
105 rte_eth_dev_socket_id(port) !=
106 (int)rte_socket_id())
107 printf("WARNING, port %u is on remote NUMA node to "
108 "polling thread.\n\tPerformance will "
109 "not be optimal.\n", port);
111 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
114 /* Run until the application is quit or killed. */
117 * Receive packets on a port and forward them on the paired
118 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
120 for (port = 0; port < nb_ports; port++) {
122 /* Get burst of RX packets, from first port of pair. */
123 struct rte_mbuf *bufs[BURST_SIZE];
124 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
127 if (unlikely(nb_rx == 0))
130 /* Send burst of TX packets, to second port of pair. */
131 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
134 /* Free any unsent packets. */
135 if (unlikely(nb_tx < nb_rx)) {
137 for (buf = nb_tx; buf < nb_rx; buf++)
138 rte_pktmbuf_free(bufs[buf]);
145 * The main function, which does initialization and calls the per-lcore
149 main(int argc, char *argv[])
151 struct rte_mempool *mbuf_pool;
155 /* Initialize the Environment Abstraction Layer (EAL). */
156 int ret = rte_eal_init(argc, argv);
158 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
163 /* Check that there is an even number of ports to send/receive on. */
164 nb_ports = rte_eth_dev_count();
165 if (nb_ports < 2 || (nb_ports & 1))
166 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
168 /* Creates a new mempool in memory to hold the mbufs. */
169 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
170 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
172 if (mbuf_pool == NULL)
173 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
175 /* Initialize all ports. */
176 for (portid = 0; portid < nb_ports; portid++)
177 if (port_init(portid, mbuf_pool) != 0)
178 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n",
181 if (rte_lcore_count() > 1)
182 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
184 /* Call lcore_main on the master core only. */