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