1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2013 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 <stdio.h> 36 #include <inttypes.h> 37 #include <stdarg.h> 38 #include <errno.h> 39 #include <sys/queue.h> 40 #include <stdlib.h> 41 #include <getopt.h> 42 #include <string.h> 43 44 #include <rte_common.h> 45 #include <rte_memory.h> 46 #include <rte_memzone.h> 47 #include <rte_tailq.h> 48 #include <rte_eal.h> 49 #include <rte_atomic.h> 50 #include <rte_branch_prediction.h> 51 #include <rte_log.h> 52 #include <rte_per_lcore.h> 53 #include <rte_launch.h> 54 #include <rte_lcore.h> 55 #include <rte_ring.h> 56 #include <rte_launch.h> 57 #include <rte_lcore.h> 58 #include <rte_debug.h> 59 #include <rte_mempool.h> 60 #include <rte_mbuf.h> 61 #include <rte_interrupts.h> 62 #include <rte_pci.h> 63 #include <rte_ether.h> 64 #include <rte_ethdev.h> 65 #include <rte_string_fns.h> 66 67 #include "common.h" 68 #include "init_drivers.h" 69 70 /* Number of packets to attempt to read from queue */ 71 #define PKT_READ_SIZE ((uint16_t)32) 72 73 /* our client id number - tells us which rx queue to read, and NIC TX 74 * queue to write to. */ 75 static uint8_t client_id = 0; 76 77 struct mbuf_queue { 78 #define MBQ_CAPACITY 32 79 struct rte_mbuf *bufs[MBQ_CAPACITY]; 80 uint16_t top; 81 }; 82 83 /* maps input ports to output ports for packets */ 84 static uint8_t output_ports[RTE_MAX_ETHPORTS]; 85 86 /* buffers up a set of packet that are ready to send */ 87 static struct mbuf_queue output_bufs[RTE_MAX_ETHPORTS]; 88 89 /* shared data from server. We update statistics here */ 90 static volatile struct tx_stats *tx_stats; 91 92 93 /* 94 * print a usage message 95 */ 96 static void 97 usage(const char *progname) 98 { 99 printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname); 100 } 101 102 /* 103 * Convert the client id number from a string to an int. 104 */ 105 static int 106 parse_client_num(const char *client) 107 { 108 char *end = NULL; 109 unsigned long temp; 110 111 if (client == NULL || *client == '\0') 112 return -1; 113 114 temp = strtoul(client, &end, 10); 115 if (end == NULL || *end != '\0') 116 return -1; 117 118 client_id = (uint8_t)temp; 119 return 0; 120 } 121 122 /* 123 * Parse the application arguments to the client app. 124 */ 125 static int 126 parse_app_args(int argc, char *argv[]) 127 { 128 int option_index, opt; 129 char **argvopt = argv; 130 const char *progname = NULL; 131 static struct option lgopts[] = { /* no long options */ 132 {NULL, 0, 0, 0 } 133 }; 134 progname = argv[0]; 135 136 while ((opt = getopt_long(argc, argvopt, "n:", lgopts, 137 &option_index)) != EOF){ 138 switch (opt){ 139 case 'n': 140 if (parse_client_num(optarg) != 0){ 141 usage(progname); 142 return -1; 143 } 144 break; 145 default: 146 usage(progname); 147 return -1; 148 } 149 } 150 return 0; 151 } 152 153 /* 154 * set up output ports so that all traffic on port gets sent out 155 * its paired port. Index using actual port numbers since that is 156 * what comes in the mbuf structure. 157 */ 158 static void configure_output_ports(const struct port_info *ports) 159 { 160 int i; 161 if (ports->num_ports > RTE_MAX_ETHPORTS) 162 rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n", 163 (unsigned)RTE_MAX_ETHPORTS); 164 for (i = 0; i < ports->num_ports - 1; i+=2){ 165 uint8_t p1 = ports->id[i]; 166 uint8_t p2 = ports->id[i+1]; 167 output_ports[p1] = p2; 168 output_ports[p2] = p1; 169 } 170 } 171 172 173 static inline void 174 send_packets(uint8_t port) 175 { 176 uint16_t i, sent; 177 struct mbuf_queue *mbq = &output_bufs[port]; 178 179 if (unlikely(mbq->top == 0)) 180 return; 181 182 sent = rte_eth_tx_burst(port, client_id, mbq->bufs, mbq->top); 183 if (unlikely(sent < mbq->top)){ 184 for (i = sent; i < mbq->top; i++) 185 rte_pktmbuf_free(mbq->bufs[i]); 186 tx_stats->tx_drop[port] += (mbq->top - sent); 187 } 188 tx_stats->tx[port] += sent; 189 mbq->top = 0; 190 } 191 192 /* 193 * Enqueue a packet to be sent on a particular port, but 194 * don't send it yet. Only when the buffer is full. 195 */ 196 static inline void 197 enqueue_packet(struct rte_mbuf *buf, uint8_t port) 198 { 199 struct mbuf_queue *mbq = &output_bufs[port]; 200 mbq->bufs[mbq->top++] = buf; 201 202 if (mbq->top == MBQ_CAPACITY) 203 send_packets(port); 204 } 205 206 /* 207 * This function performs routing of packets 208 * Just sends each input packet out an output port based solely on the input 209 * port it arrived on. 210 */ 211 static void 212 handle_packet(struct rte_mbuf *buf) 213 { 214 const uint8_t in_port = buf->pkt.in_port; 215 const uint8_t out_port = output_ports[in_port]; 216 217 enqueue_packet(buf, out_port); 218 } 219 220 /* 221 * Application main function - loops through 222 * receiving and processing packets. Never returns 223 */ 224 int 225 main(int argc, char *argv[]) 226 { 227 const struct rte_memzone *mz; 228 struct rte_ring *rx_ring; 229 struct rte_mempool *mp; 230 struct port_info *ports; 231 int need_flush = 0; /* indicates whether we have unsent packets */ 232 int retval; 233 void *pkts[PKT_READ_SIZE]; 234 235 if ((retval = rte_eal_init(argc, argv)) < 0) 236 return -1; 237 argc -= retval; 238 argv += retval; 239 240 if (parse_app_args(argc, argv) < 0) 241 rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n"); 242 243 if (init_drivers() < 0) 244 rte_exit(EXIT_FAILURE, "Cannot get NIC ports\n"); 245 if (rte_eth_dev_count() == 0) 246 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n"); 247 248 rx_ring = rte_ring_lookup(get_rx_queue_name(client_id)); 249 if (rx_ring == NULL) 250 rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n"); 251 252 mp = rte_mempool_lookup(PKTMBUF_POOL_NAME); 253 if (mp == NULL) 254 rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n"); 255 256 mz = rte_memzone_lookup(MZ_PORT_INFO); 257 if (mz == NULL) 258 rte_exit(EXIT_FAILURE, "Cannot get port info structure\n"); 259 ports = mz->addr; 260 tx_stats = &(ports->tx_stats[client_id]); 261 262 configure_output_ports(ports); 263 264 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 265 266 printf("\nClient process %d handling packets\n", client_id); 267 printf("[Press Ctrl-C to quit ...]\n"); 268 269 for (;;) { 270 uint16_t i, rx_pkts = PKT_READ_SIZE; 271 uint8_t port; 272 273 /* try dequeuing max possible packets first, if that fails, get the 274 * most we can. Loop body should only execute once, maximum */ 275 while (rx_pkts > 0 && 276 unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, rx_pkts) != 0)) 277 rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), PKT_READ_SIZE); 278 279 if (unlikely(rx_pkts == 0)){ 280 if (need_flush) 281 for (port = 0; port < ports->num_ports; port++) 282 send_packets(ports->id[port]); 283 need_flush = 0; 284 continue; 285 } 286 287 for (i = 0; i < rx_pkts; i++) 288 handle_packet(pkts[i]); 289 290 need_flush = 1; 291 } 292 } 293