1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016 Intel Corporation
8 #include <rte_ethdev.h>
9 #include <rte_cycles.h>
10 #include <rte_lcore.h>
15 #define RX_RING_SIZE 128
16 #define TX_RING_SIZE 512
18 #define NUM_MBUFS 8191
19 #define MBUF_CACHE_SIZE 250
22 static const struct rte_eth_conf port_conf_default = {
23 .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
26 /* l2fwd-cat.c: CAT enabled, 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;
39 uint16_t nb_rxd = RX_RING_SIZE;
40 uint16_t nb_txd = TX_RING_SIZE;
42 if (!rte_eth_dev_is_valid_port(port))
45 /* Configure the Ethernet device. */
46 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
50 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
54 /* Allocate and set up 1 RX queue per Ethernet port. */
55 for (q = 0; q < rx_rings; q++) {
56 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
57 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
62 /* Allocate and set up 1 TX queue per Ethernet port. */
63 for (q = 0; q < tx_rings; q++) {
64 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
65 rte_eth_dev_socket_id(port), NULL);
70 /* Start the Ethernet port. */
71 retval = rte_eth_dev_start(port);
75 /* Display the port MAC address. */
76 struct ether_addr addr;
77 rte_eth_macaddr_get(port, &addr);
78 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
79 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
81 addr.addr_bytes[0], addr.addr_bytes[1],
82 addr.addr_bytes[2], addr.addr_bytes[3],
83 addr.addr_bytes[4], addr.addr_bytes[5]);
85 /* Enable RX in promiscuous mode for the Ethernet device. */
86 rte_eth_promiscuous_enable(port);
92 * The lcore main. This is the main thread that does the work, reading from
93 * an input port and writing to an output port.
95 static __attribute__((noreturn)) void
101 * Check that the port is on the same NUMA node as the polling thread
102 * for best performance.
104 RTE_ETH_FOREACH_DEV(port)
105 if (rte_eth_dev_socket_id(port) > 0 &&
106 rte_eth_dev_socket_id(port) !=
107 (int)rte_socket_id())
108 printf("WARNING, port %u is on remote NUMA node to "
109 "polling thread.\n\tPerformance will "
110 "not be optimal.\n", port);
112 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
115 /* Run until the application is quit or killed. */
118 * Receive packets on a port and forward them on the paired
119 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
121 RTE_ETH_FOREACH_DEV(port) {
123 /* Get burst of RX packets, from first port of pair. */
124 struct rte_mbuf *bufs[BURST_SIZE];
125 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
128 if (unlikely(nb_rx == 0))
131 /* Send burst of TX packets, to second port of pair. */
132 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
135 /* Free any unsent packets. */
136 if (unlikely(nb_tx < nb_rx)) {
138 for (buf = nb_tx; buf < nb_rx; buf++)
139 rte_pktmbuf_free(bufs[buf]);
146 * The main function, which does initialization and calls the per-lcore
150 main(int argc, char *argv[])
152 struct rte_mempool *mbuf_pool;
156 /* Initialize the Environment Abstraction Layer (EAL). */
157 int ret = rte_eal_init(argc, argv);
159 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
165 * Initialize the PQoS library and configure CAT.
166 * Please see l2fwd-cat documentation for more info.
168 ret = cat_init(argc, argv);
170 rte_exit(EXIT_FAILURE, "PQOS: L3CA init failed!\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. */