1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2015 Intel Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stdint.h> 35 #include <inttypes.h> 36 #include <rte_eal.h> 37 #include <rte_ethdev.h> 38 #include <rte_cycles.h> 39 #include <rte_lcore.h> 40 #include <rte_mbuf.h> 41 42 #define RX_RING_SIZE 128 43 #define TX_RING_SIZE 512 44 45 #define NUM_MBUFS 8191 46 #define MBUF_CACHE_SIZE 250 47 #define BURST_SIZE 32 48 49 static const struct rte_eth_conf port_conf_default = { 50 .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN } 51 }; 52 53 /* basicfwd.c: Basic DPDK skeleton forwarding example. */ 54 55 /* 56 * Initializes a given port using global settings and with the RX buffers 57 * coming from the mbuf_pool passed as a parameter. 58 */ 59 static inline int 60 port_init(uint8_t port, struct rte_mempool *mbuf_pool) 61 { 62 struct rte_eth_conf port_conf = port_conf_default; 63 const uint16_t rx_rings = 1, tx_rings = 1; 64 int retval; 65 uint16_t q; 66 67 if (port >= rte_eth_dev_count()) 68 return -1; 69 70 /* Configure the Ethernet device. */ 71 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); 72 if (retval != 0) 73 return retval; 74 75 /* Allocate and set up 1 RX queue per Ethernet port. */ 76 for (q = 0; q < rx_rings; q++) { 77 retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE, 78 rte_eth_dev_socket_id(port), NULL, mbuf_pool); 79 if (retval < 0) 80 return retval; 81 } 82 83 /* Allocate and set up 1 TX queue per Ethernet port. */ 84 for (q = 0; q < tx_rings; q++) { 85 retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE, 86 rte_eth_dev_socket_id(port), NULL); 87 if (retval < 0) 88 return retval; 89 } 90 91 /* Start the Ethernet port. */ 92 retval = rte_eth_dev_start(port); 93 if (retval < 0) 94 return retval; 95 96 /* Display the port MAC address. */ 97 struct ether_addr addr; 98 rte_eth_macaddr_get(port, &addr); 99 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8 100 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n", 101 (unsigned)port, 102 addr.addr_bytes[0], addr.addr_bytes[1], 103 addr.addr_bytes[2], addr.addr_bytes[3], 104 addr.addr_bytes[4], addr.addr_bytes[5]); 105 106 /* Enable RX in promiscuous mode for the Ethernet device. */ 107 rte_eth_promiscuous_enable(port); 108 109 return 0; 110 } 111 112 /* 113 * The lcore main. This is the main thread that does the work, reading from 114 * an input port and writing to an output port. 115 */ 116 static __attribute__((noreturn)) void 117 lcore_main(void) 118 { 119 const uint8_t nb_ports = rte_eth_dev_count(); 120 uint8_t port; 121 122 /* 123 * Check that the port is on the same NUMA node as the polling thread 124 * for best performance. 125 */ 126 for (port = 0; port < nb_ports; port++) 127 if (rte_eth_dev_socket_id(port) > 0 && 128 rte_eth_dev_socket_id(port) != 129 (int)rte_socket_id()) 130 printf("WARNING, port %u is on remote NUMA node to " 131 "polling thread.\n\tPerformance will " 132 "not be optimal.\n", port); 133 134 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n", 135 rte_lcore_id()); 136 137 /* Run until the application is quit or killed. */ 138 for (;;) { 139 /* 140 * Receive packets on a port and forward them on the paired 141 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc. 142 */ 143 for (port = 0; port < nb_ports; port++) { 144 145 /* Get burst of RX packets, from first port of pair. */ 146 struct rte_mbuf *bufs[BURST_SIZE]; 147 const uint16_t nb_rx = rte_eth_rx_burst(port, 0, 148 bufs, BURST_SIZE); 149 150 if (unlikely(nb_rx == 0)) 151 continue; 152 153 /* Send burst of TX packets, to second port of pair. */ 154 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0, 155 bufs, nb_rx); 156 157 /* Free any unsent packets. */ 158 if (unlikely(nb_tx < nb_rx)) { 159 uint16_t buf; 160 for (buf = nb_tx; buf < nb_rx; buf++) 161 rte_pktmbuf_free(bufs[buf]); 162 } 163 } 164 } 165 } 166 167 /* 168 * The main function, which does initialization and calls the per-lcore 169 * functions. 170 */ 171 int 172 main(int argc, char *argv[]) 173 { 174 struct rte_mempool *mbuf_pool; 175 unsigned nb_ports; 176 uint8_t portid; 177 178 /* Initialize the Environment Abstraction Layer (EAL). */ 179 int ret = rte_eal_init(argc, argv); 180 if (ret < 0) 181 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n"); 182 183 argc -= ret; 184 argv += ret; 185 186 /* Check that there is an even number of ports to send/receive on. */ 187 nb_ports = rte_eth_dev_count(); 188 if (nb_ports < 2 || (nb_ports & 1)) 189 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n"); 190 191 /* Creates a new mempool in memory to hold the mbufs. */ 192 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports, 193 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); 194 195 if (mbuf_pool == NULL) 196 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n"); 197 198 /* Initialize all ports. */ 199 for (portid = 0; portid < nb_ports; portid++) 200 if (port_init(portid, mbuf_pool) != 0) 201 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8 "\n", 202 portid); 203 204 if (rte_lcore_count() > 1) 205 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n"); 206 207 /* Call lcore_main on the master core only. */ 208 lcore_main(); 209 210 return 0; 211 } 212