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(uint16_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 uint16_t nb_rxd = RX_RING_SIZE; 65 uint16_t nb_txd = TX_RING_SIZE; 66 int retval; 67 uint16_t q; 68 69 if (port >= rte_eth_dev_count()) 70 return -1; 71 72 /* Configure the Ethernet device. */ 73 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); 74 if (retval != 0) 75 return retval; 76 77 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd); 78 if (retval != 0) 79 return retval; 80 81 /* Allocate and set up 1 RX queue per Ethernet port. */ 82 for (q = 0; q < rx_rings; q++) { 83 retval = rte_eth_rx_queue_setup(port, q, nb_rxd, 84 rte_eth_dev_socket_id(port), NULL, mbuf_pool); 85 if (retval < 0) 86 return retval; 87 } 88 89 /* Allocate and set up 1 TX queue per Ethernet port. */ 90 for (q = 0; q < tx_rings; q++) { 91 retval = rte_eth_tx_queue_setup(port, q, nb_txd, 92 rte_eth_dev_socket_id(port), NULL); 93 if (retval < 0) 94 return retval; 95 } 96 97 /* Start the Ethernet port. */ 98 retval = rte_eth_dev_start(port); 99 if (retval < 0) 100 return retval; 101 102 /* Display the port MAC address. */ 103 struct ether_addr addr; 104 rte_eth_macaddr_get(port, &addr); 105 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8 106 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n", 107 port, 108 addr.addr_bytes[0], addr.addr_bytes[1], 109 addr.addr_bytes[2], addr.addr_bytes[3], 110 addr.addr_bytes[4], addr.addr_bytes[5]); 111 112 /* Enable RX in promiscuous mode for the Ethernet device. */ 113 rte_eth_promiscuous_enable(port); 114 115 return 0; 116 } 117 118 /* 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. 121 */ 122 static __attribute__((noreturn)) void 123 lcore_main(void) 124 { 125 const uint16_t nb_ports = rte_eth_dev_count(); 126 uint16_t port; 127 128 /* 129 * Check that the port is on the same NUMA node as the polling thread 130 * for best performance. 131 */ 132 for (port = 0; port < nb_ports; port++) 133 if (rte_eth_dev_socket_id(port) > 0 && 134 rte_eth_dev_socket_id(port) != 135 (int)rte_socket_id()) 136 printf("WARNING, port %u is on remote NUMA node to " 137 "polling thread.\n\tPerformance will " 138 "not be optimal.\n", port); 139 140 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n", 141 rte_lcore_id()); 142 143 /* Run until the application is quit or killed. */ 144 for (;;) { 145 /* 146 * Receive packets on a port and forward them on the paired 147 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc. 148 */ 149 for (port = 0; port < nb_ports; port++) { 150 151 /* Get burst of RX packets, from first port of pair. */ 152 struct rte_mbuf *bufs[BURST_SIZE]; 153 const uint16_t nb_rx = rte_eth_rx_burst(port, 0, 154 bufs, BURST_SIZE); 155 156 if (unlikely(nb_rx == 0)) 157 continue; 158 159 /* Send burst of TX packets, to second port of pair. */ 160 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0, 161 bufs, nb_rx); 162 163 /* Free any unsent packets. */ 164 if (unlikely(nb_tx < nb_rx)) { 165 uint16_t buf; 166 for (buf = nb_tx; buf < nb_rx; buf++) 167 rte_pktmbuf_free(bufs[buf]); 168 } 169 } 170 } 171 } 172 173 /* 174 * The main function, which does initialization and calls the per-lcore 175 * functions. 176 */ 177 int 178 main(int argc, char *argv[]) 179 { 180 struct rte_mempool *mbuf_pool; 181 unsigned nb_ports; 182 uint16_t portid; 183 184 /* Initialize the Environment Abstraction Layer (EAL). */ 185 int ret = rte_eal_init(argc, argv); 186 if (ret < 0) 187 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n"); 188 189 argc -= ret; 190 argv += ret; 191 192 /* Check that there is an even number of ports to send/receive on. */ 193 nb_ports = rte_eth_dev_count(); 194 if (nb_ports < 2 || (nb_ports & 1)) 195 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n"); 196 197 /* Creates a new mempool in memory to hold the mbufs. */ 198 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports, 199 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); 200 201 if (mbuf_pool == NULL) 202 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n"); 203 204 /* Initialize all ports. */ 205 for (portid = 0; portid < nb_ports; portid++) 206 if (port_init(portid, mbuf_pool) != 0) 207 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n", 208 portid); 209 210 if (rte_lcore_count() > 1) 211 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n"); 212 213 /* Call lcore_main on the master core only. */ 214 lcore_main(); 215 216 return 0; 217 } 218