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, RTE_ETHER_ADDR_BYTES(&addr)); 104 105 /* Enable RX in promiscuous mode for the Ethernet device. */ 106 retval = rte_eth_promiscuous_enable(port); 107 /* End of setting RX port in promiscuous mode. */ 108 if (retval != 0) 109 return retval; 110 111 return 0; 112 } 113 /* >8 End of main functional part of port initialization. */ 114 115 /* 116 * The lcore main. This is the main thread that does the work, reading from 117 * an input port and writing to an output port. 118 */ 119 120 /* Basic forwarding application lcore. 8< */ 121 static __rte_noreturn void 122 lcore_main(void) 123 { 124 uint16_t port; 125 126 /* 127 * Check that the port is on the same NUMA node as the polling thread 128 * for best performance. 129 */ 130 RTE_ETH_FOREACH_DEV(port) 131 if (rte_eth_dev_socket_id(port) >= 0 && 132 rte_eth_dev_socket_id(port) != 133 (int)rte_socket_id()) 134 printf("WARNING, port %u is on remote NUMA node to " 135 "polling thread.\n\tPerformance will " 136 "not be optimal.\n", port); 137 138 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n", 139 rte_lcore_id()); 140 141 /* Main work of application loop. 8< */ 142 for (;;) { 143 /* 144 * Receive packets on a port and forward them on the paired 145 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc. 146 */ 147 RTE_ETH_FOREACH_DEV(port) { 148 149 /* Get burst of RX packets, from first port of pair. */ 150 struct rte_mbuf *bufs[BURST_SIZE]; 151 const uint16_t nb_rx = rte_eth_rx_burst(port, 0, 152 bufs, BURST_SIZE); 153 154 if (unlikely(nb_rx == 0)) 155 continue; 156 157 /* Send burst of TX packets, to second port of pair. */ 158 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0, 159 bufs, nb_rx); 160 161 /* Free any unsent packets. */ 162 if (unlikely(nb_tx < nb_rx)) { 163 uint16_t buf; 164 for (buf = nb_tx; buf < nb_rx; buf++) 165 rte_pktmbuf_free(bufs[buf]); 166 } 167 } 168 } 169 /* >8 End of loop. */ 170 } 171 /* >8 End Basic forwarding application lcore. */ 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 /* Initializion the Environment Abstraction Layer (EAL). 8< */ 185 int ret = rte_eal_init(argc, argv); 186 if (ret < 0) 187 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n"); 188 /* >8 End of initializion the Environment Abstraction Layer (EAL). */ 189 190 argc -= ret; 191 argv += ret; 192 193 /* Check that there is an even number of ports to send/receive on. */ 194 nb_ports = rte_eth_dev_count_avail(); 195 if (nb_ports < 2 || (nb_ports & 1)) 196 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n"); 197 198 /* Creates a new mempool in memory to hold the mbufs. */ 199 200 /* Allocates mempool to hold the mbufs. 8< */ 201 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports, 202 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); 203 /* >8 End of allocating mempool to hold mbuf. */ 204 205 if (mbuf_pool == NULL) 206 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n"); 207 208 /* Initializing all ports. 8< */ 209 RTE_ETH_FOREACH_DEV(portid) 210 if (port_init(portid, mbuf_pool) != 0) 211 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n", 212 portid); 213 /* >8 End of initializing all ports. */ 214 215 if (rte_lcore_count() > 1) 216 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n"); 217 218 /* Call lcore_main on the main core only. Called on single lcore. 8< */ 219 lcore_main(); 220 /* >8 End of called on single lcore. */ 221 222 /* clean up the EAL */ 223 rte_eal_cleanup(); 224 225 return 0; 226 } 227