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 /* Configuration of ethernet ports. 8< */
21 static const struct rte_eth_conf port_conf_default = {
23 .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
26 /* >8 End of configuration of ethernet ports. */
28 /* basicfwd.c: Basic DPDK skeleton forwarding example. */
31 * Initializes a given port using global settings and with the RX buffers
32 * coming from the mbuf_pool passed as a parameter.
35 /* Main functional part of port initialization. 8< */
37 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
39 struct rte_eth_conf port_conf = port_conf_default;
40 const uint16_t rx_rings = 1, tx_rings = 1;
41 uint16_t nb_rxd = RX_RING_SIZE;
42 uint16_t nb_txd = TX_RING_SIZE;
45 struct rte_eth_dev_info dev_info;
46 struct rte_eth_txconf txconf;
48 if (!rte_eth_dev_is_valid_port(port))
51 retval = rte_eth_dev_info_get(port, &dev_info);
53 printf("Error during getting device (port %u) info: %s\n",
54 port, strerror(-retval));
58 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
59 port_conf.txmode.offloads |=
60 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
62 /* Configure the Ethernet device. */
63 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
67 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
71 /* Allocate and set up 1 RX queue per Ethernet port. */
72 for (q = 0; q < rx_rings; q++) {
73 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
74 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
79 txconf = dev_info.default_txconf;
80 txconf.offloads = port_conf.txmode.offloads;
81 /* Allocate and set up 1 TX queue per Ethernet port. */
82 for (q = 0; q < tx_rings; q++) {
83 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
84 rte_eth_dev_socket_id(port), &txconf);
89 /* Starting Ethernet port. 8< */
90 retval = rte_eth_dev_start(port);
91 /* >8 End of starting of ethernet port. */
95 /* Display the port MAC address. */
96 struct rte_ether_addr addr;
97 retval = rte_eth_macaddr_get(port, &addr);
101 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
102 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
104 addr.addr_bytes[0], addr.addr_bytes[1],
105 addr.addr_bytes[2], addr.addr_bytes[3],
106 addr.addr_bytes[4], addr.addr_bytes[5]);
108 /* Enable RX in promiscuous mode for the Ethernet device. */
109 retval = rte_eth_promiscuous_enable(port);
110 /* End of setting RX port in promiscuous mode. */
116 /* >8 End of main functional part of port initialization. */
119 * The lcore main. This is the main thread that does the work, reading from
120 * an input port and writing to an output port.
123 /* Basic forwarding application lcore. 8< */
124 static __rte_noreturn void
130 * Check that the port is on the same NUMA node as the polling thread
131 * for best performance.
133 RTE_ETH_FOREACH_DEV(port)
134 if (rte_eth_dev_socket_id(port) >= 0 &&
135 rte_eth_dev_socket_id(port) !=
136 (int)rte_socket_id())
137 printf("WARNING, port %u is on remote NUMA node to "
138 "polling thread.\n\tPerformance will "
139 "not be optimal.\n", port);
141 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
144 /* Main work of application loop. 8< */
147 * Receive packets on a port and forward them on the paired
148 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
150 RTE_ETH_FOREACH_DEV(port) {
152 /* Get burst of RX packets, from first port of pair. */
153 struct rte_mbuf *bufs[BURST_SIZE];
154 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
157 if (unlikely(nb_rx == 0))
160 /* Send burst of TX packets, to second port of pair. */
161 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
164 /* Free any unsent packets. */
165 if (unlikely(nb_tx < nb_rx)) {
167 for (buf = nb_tx; buf < nb_rx; buf++)
168 rte_pktmbuf_free(bufs[buf]);
172 /* >8 End of loop. */
174 /* >8 End Basic forwarding application lcore. */
177 * The main function, which does initialization and calls the per-lcore
181 main(int argc, char *argv[])
183 struct rte_mempool *mbuf_pool;
187 /* Initializion the Environment Abstraction Layer (EAL). 8< */
188 int ret = rte_eal_init(argc, argv);
190 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
191 /* >8 End of initializion the Environment Abstraction Layer (EAL). */
196 /* Check that there is an even number of ports to send/receive on. */
197 nb_ports = rte_eth_dev_count_avail();
198 if (nb_ports < 2 || (nb_ports & 1))
199 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
201 /* Creates a new mempool in memory to hold the mbufs. */
203 /* Allocates mempool to hold the mbufs. 8< */
204 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
205 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
206 /* >8 End of allocating mempool to hold mbuf. */
208 if (mbuf_pool == NULL)
209 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
211 /* Initializing all ports. 8< */
212 RTE_ETH_FOREACH_DEV(portid)
213 if (port_init(portid, mbuf_pool) != 0)
214 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n",
216 /* >8 End of initializing all ports. */
218 if (rte_lcore_count() > 1)
219 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
221 /* Call lcore_main on the main core only. Called on single lcore. 8< */
223 /* >8 End of called on single lcore. */
225 /* clean up the EAL */