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 1024
14 #define TX_RING_SIZE 1024
16 #define NUM_MBUFS 8191
17 #define MBUF_CACHE_SIZE 250
20 static const struct rte_eth_conf port_conf_default = {
22 .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
26 /* basicfwd.c: Basic DPDK skeleton forwarding example. */
29 * Initializes a given port using global settings and with the RX buffers
30 * coming from the mbuf_pool passed as a parameter.
33 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
35 struct rte_eth_conf port_conf = port_conf_default;
36 const uint16_t rx_rings = 1, tx_rings = 1;
37 uint16_t nb_rxd = RX_RING_SIZE;
38 uint16_t nb_txd = TX_RING_SIZE;
41 struct rte_eth_dev_info dev_info;
42 struct rte_eth_txconf txconf;
44 if (!rte_eth_dev_is_valid_port(port))
47 retval = rte_eth_dev_info_get(port, &dev_info);
49 printf("Error during getting device (port %u) info: %s\n",
50 port, strerror(-retval));
54 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
55 port_conf.txmode.offloads |=
56 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
58 /* Configure the Ethernet device. */
59 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
63 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
67 /* Allocate and set up 1 RX queue per Ethernet port. */
68 for (q = 0; q < rx_rings; q++) {
69 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
70 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
75 txconf = dev_info.default_txconf;
76 txconf.offloads = port_conf.txmode.offloads;
77 /* Allocate and set up 1 TX queue per Ethernet port. */
78 for (q = 0; q < tx_rings; q++) {
79 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
80 rte_eth_dev_socket_id(port), &txconf);
85 /* Start the Ethernet port. */
86 retval = rte_eth_dev_start(port);
90 /* Display the port MAC address. */
91 struct rte_ether_addr addr;
92 rte_eth_macaddr_get(port, &addr);
93 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
94 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
96 addr.addr_bytes[0], addr.addr_bytes[1],
97 addr.addr_bytes[2], addr.addr_bytes[3],
98 addr.addr_bytes[4], addr.addr_bytes[5]);
100 /* Enable RX in promiscuous mode for the Ethernet device. */
101 retval = rte_eth_promiscuous_enable(port);
109 * The lcore main. This is the main thread that does the work, reading from
110 * an input port and writing to an output port.
112 static __attribute__((noreturn)) void
118 * Check that the port is on the same NUMA node as the polling thread
119 * for best performance.
121 RTE_ETH_FOREACH_DEV(port)
122 if (rte_eth_dev_socket_id(port) > 0 &&
123 rte_eth_dev_socket_id(port) !=
124 (int)rte_socket_id())
125 printf("WARNING, port %u is on remote NUMA node to "
126 "polling thread.\n\tPerformance will "
127 "not be optimal.\n", port);
129 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
132 /* Run until the application is quit or killed. */
135 * Receive packets on a port and forward them on the paired
136 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
138 RTE_ETH_FOREACH_DEV(port) {
140 /* Get burst of RX packets, from first port of pair. */
141 struct rte_mbuf *bufs[BURST_SIZE];
142 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
145 if (unlikely(nb_rx == 0))
148 /* Send burst of TX packets, to second port of pair. */
149 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
152 /* Free any unsent packets. */
153 if (unlikely(nb_tx < nb_rx)) {
155 for (buf = nb_tx; buf < nb_rx; buf++)
156 rte_pktmbuf_free(bufs[buf]);
163 * The main function, which does initialization and calls the per-lcore
167 main(int argc, char *argv[])
169 struct rte_mempool *mbuf_pool;
173 /* Initialize the Environment Abstraction Layer (EAL). */
174 int ret = rte_eal_init(argc, argv);
176 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
181 /* Check that there is an even number of ports to send/receive on. */
182 nb_ports = rte_eth_dev_count_avail();
183 if (nb_ports < 2 || (nb_ports & 1))
184 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
186 /* Creates a new mempool in memory to hold the mbufs. */
187 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
188 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
190 if (mbuf_pool == NULL)
191 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
193 /* Initialize all ports. */
194 RTE_ETH_FOREACH_DEV(portid)
195 if (port_init(portid, mbuf_pool) != 0)
196 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n",
199 if (rte_lcore_count() > 1)
200 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
202 /* Call lcore_main on the master core only. */