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 = ETHER_MAX_LEN,
23 .ignore_offload_bitfield = 1,
27 /* basicfwd.c: Basic DPDK skeleton forwarding example. */
30 * Initializes a given port using global settings and with the RX buffers
31 * coming from the mbuf_pool passed as a parameter.
34 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
36 struct rte_eth_conf port_conf = port_conf_default;
37 const uint16_t rx_rings = 1, tx_rings = 1;
38 uint16_t nb_rxd = RX_RING_SIZE;
39 uint16_t nb_txd = TX_RING_SIZE;
42 struct rte_eth_dev_info dev_info;
43 struct rte_eth_txconf txconf;
45 if (!rte_eth_dev_is_valid_port(port))
48 rte_eth_dev_info_get(port, &dev_info);
49 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
50 port_conf.txmode.offloads |=
51 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
53 /* Configure the Ethernet device. */
54 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
58 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
62 /* Allocate and set up 1 RX queue per Ethernet port. */
63 for (q = 0; q < rx_rings; q++) {
64 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
65 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
70 txconf = dev_info.default_txconf;
71 txconf.txq_flags = ETH_TXQ_FLAGS_IGNORE;
72 txconf.offloads = port_conf.txmode.offloads;
73 /* Allocate and set up 1 TX queue per Ethernet port. */
74 for (q = 0; q < tx_rings; q++) {
75 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
76 rte_eth_dev_socket_id(port), &txconf);
81 /* Start the Ethernet port. */
82 retval = rte_eth_dev_start(port);
86 /* Display the port MAC address. */
87 struct ether_addr addr;
88 rte_eth_macaddr_get(port, &addr);
89 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
90 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
92 addr.addr_bytes[0], addr.addr_bytes[1],
93 addr.addr_bytes[2], addr.addr_bytes[3],
94 addr.addr_bytes[4], addr.addr_bytes[5]);
96 /* Enable RX in promiscuous mode for the Ethernet device. */
97 rte_eth_promiscuous_enable(port);
103 * The lcore main. This is the main thread that does the work, reading from
104 * an input port and writing to an output port.
106 static __attribute__((noreturn)) void
112 * Check that the port is on the same NUMA node as the polling thread
113 * for best performance.
115 RTE_ETH_FOREACH_DEV(port)
116 if (rte_eth_dev_socket_id(port) > 0 &&
117 rte_eth_dev_socket_id(port) !=
118 (int)rte_socket_id())
119 printf("WARNING, port %u is on remote NUMA node to "
120 "polling thread.\n\tPerformance will "
121 "not be optimal.\n", port);
123 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
126 /* Run until the application is quit or killed. */
129 * Receive packets on a port and forward them on the paired
130 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
132 RTE_ETH_FOREACH_DEV(port) {
134 /* Get burst of RX packets, from first port of pair. */
135 struct rte_mbuf *bufs[BURST_SIZE];
136 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
139 if (unlikely(nb_rx == 0))
142 /* Send burst of TX packets, to second port of pair. */
143 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
146 /* Free any unsent packets. */
147 if (unlikely(nb_tx < nb_rx)) {
149 for (buf = nb_tx; buf < nb_rx; buf++)
150 rte_pktmbuf_free(bufs[buf]);
157 * The main function, which does initialization and calls the per-lcore
161 main(int argc, char *argv[])
163 struct rte_mempool *mbuf_pool;
167 /* Initialize the Environment Abstraction Layer (EAL). */
168 int ret = rte_eal_init(argc, argv);
170 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
175 /* Check that there is an even number of ports to send/receive on. */
176 nb_ports = rte_eth_dev_count_avail();
177 if (nb_ports < 2 || (nb_ports & 1))
178 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
180 /* Creates a new mempool in memory to hold the mbufs. */
181 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
182 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
184 if (mbuf_pool == NULL)
185 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
187 /* Initialize all ports. */
188 RTE_ETH_FOREACH_DEV(portid)
189 if (port_init(portid, mbuf_pool) != 0)
190 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n",
193 if (rte_lcore_count() > 1)
194 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
196 /* Call lcore_main on the master core only. */