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 /* Configuration of ethernet ports. 8< */ 21 static const struct rte_eth_conf port_conf_default = { 22 .rxmode = { 23 .max_rx_pkt_len = RTE_ETHER_MAX_LEN, 24 }, 25 }; 26 /* >8 End of configuration of ethernet ports. */ 27 28 /* basicfwd.c: Basic DPDK skeleton forwarding example. */ 29 30 /* 31 * Initializes a given port using global settings and with the RX buffers 32 * coming from the mbuf_pool passed as a parameter. 33 */ 34 35 /* Main functional part of port initialization. 8< */ 36 static inline int 37 port_init(uint16_t port, struct rte_mempool *mbuf_pool) 38 { 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; 43 int retval; 44 uint16_t q; 45 struct rte_eth_dev_info dev_info; 46 struct rte_eth_txconf txconf; 47 48 if (!rte_eth_dev_is_valid_port(port)) 49 return -1; 50 51 retval = rte_eth_dev_info_get(port, &dev_info); 52 if (retval != 0) { 53 printf("Error during getting device (port %u) info: %s\n", 54 port, strerror(-retval)); 55 return retval; 56 } 57 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; 61 62 /* Configure the Ethernet device. */ 63 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); 64 if (retval != 0) 65 return retval; 66 67 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd); 68 if (retval != 0) 69 return retval; 70 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); 75 if (retval < 0) 76 return retval; 77 } 78 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); 85 if (retval < 0) 86 return retval; 87 } 88 89 /* Starting Ethernet port. 8< */ 90 retval = rte_eth_dev_start(port); 91 /* >8 End of starting of ethernet port. */ 92 if (retval < 0) 93 return retval; 94 95 /* Display the port MAC address. */ 96 struct rte_ether_addr addr; 97 retval = rte_eth_macaddr_get(port, &addr); 98 if (retval != 0) 99 return retval; 100 101 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8 102 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n", 103 port, 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]); 107 108 /* 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. */ 111 if (retval != 0) 112 return retval; 113 114 return 0; 115 } 116 /* >8 End of main functional part of port initialization. */ 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 */ 122 123 /* Basic forwarding application lcore. 8< */ 124 static __rte_noreturn void 125 lcore_main(void) 126 { 127 uint16_t port; 128 129 /* 130 * Check that the port is on the same NUMA node as the polling thread 131 * for best performance. 132 */ 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); 140 141 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n", 142 rte_lcore_id()); 143 144 /* Main work of application loop. 8< */ 145 for (;;) { 146 /* 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. 149 */ 150 RTE_ETH_FOREACH_DEV(port) { 151 152 /* 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, 155 bufs, BURST_SIZE); 156 157 if (unlikely(nb_rx == 0)) 158 continue; 159 160 /* Send burst of TX packets, to second port of pair. */ 161 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0, 162 bufs, nb_rx); 163 164 /* Free any unsent packets. */ 165 if (unlikely(nb_tx < nb_rx)) { 166 uint16_t buf; 167 for (buf = nb_tx; buf < nb_rx; buf++) 168 rte_pktmbuf_free(bufs[buf]); 169 } 170 } 171 } 172 /* >8 End of loop. */ 173 } 174 /* >8 End Basic forwarding application lcore. */ 175 176 /* 177 * The main function, which does initialization and calls the per-lcore 178 * functions. 179 */ 180 int 181 main(int argc, char *argv[]) 182 { 183 struct rte_mempool *mbuf_pool; 184 unsigned nb_ports; 185 uint16_t portid; 186 187 /* Initializion the Environment Abstraction Layer (EAL). 8< */ 188 int ret = rte_eal_init(argc, argv); 189 if (ret < 0) 190 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n"); 191 /* >8 End of initializion the Environment Abstraction Layer (EAL). */ 192 193 argc -= ret; 194 argv += ret; 195 196 /* 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"); 200 201 /* Creates a new mempool in memory to hold the mbufs. */ 202 203 /* 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. */ 207 208 if (mbuf_pool == NULL) 209 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n"); 210 211 /* 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", 215 portid); 216 /* >8 End of initializing all ports. */ 217 218 if (rte_lcore_count() > 1) 219 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n"); 220 221 /* Call lcore_main on the main core only. Called on single lcore. 8< */ 222 lcore_main(); 223 /* >8 End of called on single lcore. */ 224 225 /* clean up the EAL */ 226 rte_eal_cleanup(); 227 228 return 0; 229 } 230