1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2015 Intel Corporation 3 */ 4 5 #include <stdint.h> 6 #include <inttypes.h> 7 #include <rte_eal.h> 8 #include <rte_ethdev.h> 9 #include <rte_cycles.h> 10 #include <rte_lcore.h> 11 #include <rte_mbuf.h> 12 13 #define RX_RING_SIZE 1024 14 #define TX_RING_SIZE 1024 15 16 #define NUM_MBUFS 8191 17 #define MBUF_CACHE_SIZE 250 18 #define BURST_SIZE 32 19 20 static const struct rte_eth_conf port_conf_default = { 21 .rxmode = { 22 .max_rx_pkt_len = ETHER_MAX_LEN, 23 .ignore_offload_bitfield = 1, 24 }, 25 }; 26 27 /* basicfwd.c: Basic DPDK skeleton forwarding example. */ 28 29 /* 30 * Initializes a given port using global settings and with the RX buffers 31 * coming from the mbuf_pool passed as a parameter. 32 */ 33 static inline int 34 port_init(uint16_t port, struct rte_mempool *mbuf_pool) 35 { 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; 40 int retval; 41 uint16_t q; 42 struct rte_eth_dev_info dev_info; 43 struct rte_eth_txconf txconf; 44 45 if (!rte_eth_dev_is_valid_port(port)) 46 return -1; 47 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; 52 53 /* Configure the Ethernet device. */ 54 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); 55 if (retval != 0) 56 return retval; 57 58 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd); 59 if (retval != 0) 60 return retval; 61 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); 66 if (retval < 0) 67 return retval; 68 } 69 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); 77 if (retval < 0) 78 return retval; 79 } 80 81 /* Start the Ethernet port. */ 82 retval = rte_eth_dev_start(port); 83 if (retval < 0) 84 return retval; 85 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", 91 port, 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]); 95 96 /* Enable RX in promiscuous mode for the Ethernet device. */ 97 rte_eth_promiscuous_enable(port); 98 99 return 0; 100 } 101 102 /* 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. 105 */ 106 static __attribute__((noreturn)) void 107 lcore_main(void) 108 { 109 uint16_t port; 110 111 /* 112 * Check that the port is on the same NUMA node as the polling thread 113 * for best performance. 114 */ 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); 122 123 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n", 124 rte_lcore_id()); 125 126 /* Run until the application is quit or killed. */ 127 for (;;) { 128 /* 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. 131 */ 132 RTE_ETH_FOREACH_DEV(port) { 133 134 /* 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, 137 bufs, BURST_SIZE); 138 139 if (unlikely(nb_rx == 0)) 140 continue; 141 142 /* Send burst of TX packets, to second port of pair. */ 143 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0, 144 bufs, nb_rx); 145 146 /* Free any unsent packets. */ 147 if (unlikely(nb_tx < nb_rx)) { 148 uint16_t buf; 149 for (buf = nb_tx; buf < nb_rx; buf++) 150 rte_pktmbuf_free(bufs[buf]); 151 } 152 } 153 } 154 } 155 156 /* 157 * The main function, which does initialization and calls the per-lcore 158 * functions. 159 */ 160 int 161 main(int argc, char *argv[]) 162 { 163 struct rte_mempool *mbuf_pool; 164 unsigned nb_ports; 165 uint16_t portid; 166 167 /* Initialize the Environment Abstraction Layer (EAL). */ 168 int ret = rte_eal_init(argc, argv); 169 if (ret < 0) 170 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n"); 171 172 argc -= ret; 173 argv += ret; 174 175 /* 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"); 179 180 /* 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()); 183 184 if (mbuf_pool == NULL) 185 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n"); 186 187 /* 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", 191 portid); 192 193 if (rte_lcore_count() > 1) 194 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n"); 195 196 /* Call lcore_main on the master core only. */ 197 lcore_main(); 198 199 return 0; 200 } 201