1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2012 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 * version: DPDK.L.1.2.3-3 34 */ 35 36 #include <stdint.h> 37 #include <stdio.h> 38 #include <inttypes.h> 39 #include <stdarg.h> 40 #include <errno.h> 41 #include <sys/queue.h> 42 #include <stdlib.h> 43 #include <getopt.h> 44 #include <string.h> 45 46 #include <rte_common.h> 47 #include <rte_memory.h> 48 #include <rte_memzone.h> 49 #include <rte_tailq.h> 50 #include <rte_eal.h> 51 #include <rte_atomic.h> 52 #include <rte_branch_prediction.h> 53 #include <rte_log.h> 54 #include <rte_per_lcore.h> 55 #include <rte_launch.h> 56 #include <rte_lcore.h> 57 #include <rte_ring.h> 58 #include <rte_launch.h> 59 #include <rte_lcore.h> 60 #include <rte_debug.h> 61 #include <rte_mempool.h> 62 #include <rte_mbuf.h> 63 #include <rte_interrupts.h> 64 #include <rte_pci.h> 65 #include <rte_ether.h> 66 #include <rte_ethdev.h> 67 #include <rte_string_fns.h> 68 69 #include "common.h" 70 #include "init_drivers.h" 71 72 /* Number of packets to attempt to read from queue */ 73 #define PKT_READ_SIZE ((uint16_t)32) 74 75 /* our client id number - tells us which rx queue to read, and NIC TX 76 * queue to write to. */ 77 static uint8_t client_id = 0; 78 79 struct mbuf_queue { 80 #define MBQ_CAPACITY 32 81 struct rte_mbuf *bufs[MBQ_CAPACITY]; 82 uint16_t top; 83 }; 84 85 /* maps input ports to output ports for packets */ 86 static uint8_t output_ports[RTE_MAX_ETHPORTS]; 87 88 /* buffers up a set of packet that are ready to send */ 89 static struct mbuf_queue output_bufs[RTE_MAX_ETHPORTS]; 90 91 /* shared data from server. We update statistics here */ 92 static volatile struct tx_stats *tx_stats; 93 94 95 /* 96 * print a usage message 97 */ 98 static void 99 usage(const char *progname) 100 { 101 printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname); 102 } 103 104 /* 105 * Convert the client id number from a string to an int. 106 */ 107 static int 108 parse_client_num(const char *client) 109 { 110 char *end = NULL; 111 unsigned long temp; 112 113 if (client == NULL || *client == '\0') 114 return -1; 115 116 temp = strtoul(client, &end, 10); 117 if (end == NULL || *end != '\0') 118 return -1; 119 120 client_id = (uint8_t)temp; 121 return 0; 122 } 123 124 /* 125 * Parse the application arguments to the client app. 126 */ 127 static int 128 parse_app_args(int argc, char *argv[]) 129 { 130 int option_index, opt; 131 char **argvopt = argv; 132 const char *progname = NULL; 133 static struct option lgopts[] = { /* no long options */ 134 {NULL, 0, 0, 0 } 135 }; 136 progname = argv[0]; 137 138 while ((opt = getopt_long(argc, argvopt, "n:", lgopts, 139 &option_index)) != EOF){ 140 switch (opt){ 141 case 'n': 142 if (parse_client_num(optarg) != 0){ 143 usage(progname); 144 return -1; 145 } 146 break; 147 default: 148 usage(progname); 149 return -1; 150 } 151 } 152 return 0; 153 } 154 155 /* 156 * set up output ports so that all traffic on port gets sent out 157 * its paired port. Index using actual port numbers since that is 158 * what comes in the mbuf structure. 159 */ 160 static void configure_output_ports(const struct port_info *ports) 161 { 162 int i; 163 if (ports->num_ports > RTE_MAX_ETHPORTS) 164 rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n", 165 (unsigned)RTE_MAX_ETHPORTS); 166 for (i = 0; i < ports->num_ports - 1; i+=2){ 167 uint8_t p1 = ports->id[i]; 168 uint8_t p2 = ports->id[i+1]; 169 output_ports[p1] = p2; 170 output_ports[p2] = p1; 171 } 172 } 173 174 175 static inline void 176 send_packets(uint8_t port) 177 { 178 uint16_t i, sent; 179 struct mbuf_queue *mbq = &output_bufs[port]; 180 181 if (unlikely(mbq->top == 0)) 182 return; 183 184 sent = rte_eth_tx_burst(port, client_id, mbq->bufs, mbq->top); 185 if (unlikely(sent < mbq->top)){ 186 for (i = sent; i < mbq->top; i++) 187 rte_pktmbuf_free(mbq->bufs[i]); 188 tx_stats->tx_drop[port] += (mbq->top - sent); 189 } 190 tx_stats->tx[port] += sent; 191 mbq->top = 0; 192 } 193 194 /* 195 * Enqueue a packet to be sent on a particular port, but 196 * don't send it yet. Only when the buffer is full. 197 */ 198 static inline void 199 enqueue_packet(struct rte_mbuf *buf, uint8_t port) 200 { 201 struct mbuf_queue *mbq = &output_bufs[port]; 202 mbq->bufs[mbq->top++] = buf; 203 204 if (mbq->top == MBQ_CAPACITY) 205 send_packets(port); 206 } 207 208 /* 209 * This function performs routing of packets 210 * Just sends each input packet out an output port based solely on the input 211 * port it arrived on. 212 */ 213 static void 214 handle_packet(struct rte_mbuf *buf) 215 { 216 const uint8_t in_port = buf->pkt.in_port; 217 const uint8_t out_port = output_ports[in_port]; 218 219 enqueue_packet(buf, out_port); 220 } 221 222 /* 223 * Application main function - loops through 224 * receiving and processing packets. Never returns 225 */ 226 int 227 main(int argc, char *argv[]) 228 { 229 const struct rte_memzone *mz; 230 struct rte_ring *rx_ring; 231 struct rte_mempool *mp; 232 struct port_info *ports; 233 int need_flush = 0; /* indicates whether we have unsent packets */ 234 int retval; 235 void *pkts[PKT_READ_SIZE]; 236 237 if ((retval = rte_eal_init(argc, argv)) < 0) 238 return -1; 239 argc -= retval; 240 argv += retval; 241 242 if (parse_app_args(argc, argv) < 0) 243 rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n"); 244 245 if (init_drivers() < 0) 246 rte_exit(EXIT_FAILURE, "Cannot get NIC ports\n"); 247 if (rte_eth_dev_count() == 0) 248 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n"); 249 250 rx_ring = rte_ring_lookup(get_rx_queue_name(client_id)); 251 if (rx_ring == NULL) 252 rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n"); 253 254 mp = rte_mempool_lookup(PKTMBUF_POOL_NAME); 255 if (mp == NULL) 256 rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n"); 257 258 mz = rte_memzone_lookup(MZ_PORT_INFO); 259 if (mz == NULL) 260 rte_exit(EXIT_FAILURE, "Cannot get port info structure\n"); 261 ports = mz->addr; 262 tx_stats = &(ports->tx_stats[client_id]); 263 264 configure_output_ports(ports); 265 266 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 267 268 printf("\nClient process %d handling packets\n", client_id); 269 printf("[Press Ctrl-C to quit ...]\n"); 270 271 for (;;) { 272 uint16_t i, rx_pkts = PKT_READ_SIZE; 273 uint8_t port; 274 275 /* try dequeuing max possible packets first, if that fails, get the 276 * most we can. Loop body should only execute once, maximum */ 277 while (rx_pkts > 0 && 278 unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, rx_pkts) != 0)) 279 rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), PKT_READ_SIZE); 280 281 if (unlikely(rx_pkts == 0)){ 282 if (need_flush) 283 for (port = 0; port < ports->num_ports; port++) 284 send_packets(ports->id[port]); 285 need_flush = 0; 286 continue; 287 } 288 289 for (i = 0; i < rx_pkts; i++) 290 handle_packet(pkts[i]); 291 292 need_flush = 1; 293 } 294 } 295