1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2014 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 69 /* Number of packets to attempt to read from queue */ 70 #define PKT_READ_SIZE ((uint16_t)32) 71 72 /* our client id number - tells us which rx queue to read, and NIC TX 73 * queue to write to. */ 74 static uint8_t client_id = 0; 75 76 struct mbuf_queue { 77 #define MBQ_CAPACITY 32 78 struct rte_mbuf *bufs[MBQ_CAPACITY]; 79 uint16_t top; 80 }; 81 82 /* maps input ports to output ports for packets */ 83 static uint8_t output_ports[RTE_MAX_ETHPORTS]; 84 85 /* buffers up a set of packet that are ready to send */ 86 static struct mbuf_queue output_bufs[RTE_MAX_ETHPORTS]; 87 88 /* shared data from server. We update statistics here */ 89 static volatile struct tx_stats *tx_stats; 90 91 92 /* 93 * print a usage message 94 */ 95 static void 96 usage(const char *progname) 97 { 98 printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname); 99 } 100 101 /* 102 * Convert the client id number from a string to an int. 103 */ 104 static int 105 parse_client_num(const char *client) 106 { 107 char *end = NULL; 108 unsigned long temp; 109 110 if (client == NULL || *client == '\0') 111 return -1; 112 113 temp = strtoul(client, &end, 10); 114 if (end == NULL || *end != '\0') 115 return -1; 116 117 client_id = (uint8_t)temp; 118 return 0; 119 } 120 121 /* 122 * Parse the application arguments to the client app. 123 */ 124 static int 125 parse_app_args(int argc, char *argv[]) 126 { 127 int option_index, opt; 128 char **argvopt = argv; 129 const char *progname = NULL; 130 static struct option lgopts[] = { /* no long options */ 131 {NULL, 0, 0, 0 } 132 }; 133 progname = argv[0]; 134 135 while ((opt = getopt_long(argc, argvopt, "n:", lgopts, 136 &option_index)) != EOF){ 137 switch (opt){ 138 case 'n': 139 if (parse_client_num(optarg) != 0){ 140 usage(progname); 141 return -1; 142 } 143 break; 144 default: 145 usage(progname); 146 return -1; 147 } 148 } 149 return 0; 150 } 151 152 /* 153 * set up output ports so that all traffic on port gets sent out 154 * its paired port. Index using actual port numbers since that is 155 * what comes in the mbuf structure. 156 */ 157 static void configure_output_ports(const struct port_info *ports) 158 { 159 int i; 160 if (ports->num_ports > RTE_MAX_ETHPORTS) 161 rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n", 162 (unsigned)RTE_MAX_ETHPORTS); 163 for (i = 0; i < ports->num_ports - 1; i+=2){ 164 uint8_t p1 = ports->id[i]; 165 uint8_t p2 = ports->id[i+1]; 166 output_ports[p1] = p2; 167 output_ports[p2] = p1; 168 } 169 } 170 171 172 static inline void 173 send_packets(uint8_t port) 174 { 175 uint16_t i, sent; 176 struct mbuf_queue *mbq = &output_bufs[port]; 177 178 if (unlikely(mbq->top == 0)) 179 return; 180 181 sent = rte_eth_tx_burst(port, client_id, mbq->bufs, mbq->top); 182 if (unlikely(sent < mbq->top)){ 183 for (i = sent; i < mbq->top; i++) 184 rte_pktmbuf_free(mbq->bufs[i]); 185 tx_stats->tx_drop[port] += (mbq->top - sent); 186 } 187 tx_stats->tx[port] += sent; 188 mbq->top = 0; 189 } 190 191 /* 192 * Enqueue a packet to be sent on a particular port, but 193 * don't send it yet. Only when the buffer is full. 194 */ 195 static inline void 196 enqueue_packet(struct rte_mbuf *buf, uint8_t port) 197 { 198 struct mbuf_queue *mbq = &output_bufs[port]; 199 mbq->bufs[mbq->top++] = buf; 200 201 if (mbq->top == MBQ_CAPACITY) 202 send_packets(port); 203 } 204 205 /* 206 * This function performs routing of packets 207 * Just sends each input packet out an output port based solely on the input 208 * port it arrived on. 209 */ 210 static void 211 handle_packet(struct rte_mbuf *buf) 212 { 213 const uint8_t in_port = buf->port; 214 const uint8_t out_port = output_ports[in_port]; 215 216 enqueue_packet(buf, out_port); 217 } 218 219 /* 220 * Application main function - loops through 221 * receiving and processing packets. Never returns 222 */ 223 int 224 main(int argc, char *argv[]) 225 { 226 const struct rte_memzone *mz; 227 struct rte_ring *rx_ring; 228 struct rte_mempool *mp; 229 struct port_info *ports; 230 int need_flush = 0; /* indicates whether we have unsent packets */ 231 int retval; 232 void *pkts[PKT_READ_SIZE]; 233 234 if ((retval = rte_eal_init(argc, argv)) < 0) 235 return -1; 236 argc -= retval; 237 argv += retval; 238 239 if (parse_app_args(argc, argv) < 0) 240 rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n"); 241 242 if (rte_eth_dev_count() == 0) 243 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n"); 244 245 rx_ring = rte_ring_lookup(get_rx_queue_name(client_id)); 246 if (rx_ring == NULL) 247 rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n"); 248 249 mp = rte_mempool_lookup(PKTMBUF_POOL_NAME); 250 if (mp == NULL) 251 rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n"); 252 253 mz = rte_memzone_lookup(MZ_PORT_INFO); 254 if (mz == NULL) 255 rte_exit(EXIT_FAILURE, "Cannot get port info structure\n"); 256 ports = mz->addr; 257 tx_stats = &(ports->tx_stats[client_id]); 258 259 configure_output_ports(ports); 260 261 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 262 263 printf("\nClient process %d handling packets\n", client_id); 264 printf("[Press Ctrl-C to quit ...]\n"); 265 266 for (;;) { 267 uint16_t i, rx_pkts = PKT_READ_SIZE; 268 uint8_t port; 269 270 /* try dequeuing max possible packets first, if that fails, get the 271 * most we can. Loop body should only execute once, maximum */ 272 while (rx_pkts > 0 && 273 unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, rx_pkts) != 0)) 274 rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), PKT_READ_SIZE); 275 276 if (unlikely(rx_pkts == 0)){ 277 if (need_flush) 278 for (port = 0; port < ports->num_ports; port++) 279 send_packets(ports->id[port]); 280 need_flush = 0; 281 continue; 282 } 283 284 for (i = 0; i < rx_pkts; i++) 285 handle_packet(pkts[i]); 286 287 need_flush = 1; 288 } 289 } 290