1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2016 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_malloc.h> 46 #include <rte_memory.h> 47 #include <rte_memzone.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 #define MBQ_CAPACITY 32 77 78 /* maps input ports to output ports for packets */ 79 static uint8_t output_ports[RTE_MAX_ETHPORTS]; 80 81 /* buffers up a set of packet that are ready to send */ 82 struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS]; 83 84 /* shared data from server. We update statistics here */ 85 static volatile struct tx_stats *tx_stats; 86 87 88 /* 89 * print a usage message 90 */ 91 static void 92 usage(const char *progname) 93 { 94 printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname); 95 } 96 97 /* 98 * Convert the client id number from a string to an int. 99 */ 100 static int 101 parse_client_num(const char *client) 102 { 103 char *end = NULL; 104 unsigned long temp; 105 106 if (client == NULL || *client == '\0') 107 return -1; 108 109 temp = strtoul(client, &end, 10); 110 if (end == NULL || *end != '\0') 111 return -1; 112 113 client_id = (uint8_t)temp; 114 return 0; 115 } 116 117 /* 118 * Parse the application arguments to the client app. 119 */ 120 static int 121 parse_app_args(int argc, char *argv[]) 122 { 123 int option_index, opt; 124 char **argvopt = argv; 125 const char *progname = NULL; 126 static struct option lgopts[] = { /* no long options */ 127 {NULL, 0, 0, 0 } 128 }; 129 progname = argv[0]; 130 131 while ((opt = getopt_long(argc, argvopt, "n:", lgopts, 132 &option_index)) != EOF){ 133 switch (opt){ 134 case 'n': 135 if (parse_client_num(optarg) != 0){ 136 usage(progname); 137 return -1; 138 } 139 break; 140 default: 141 usage(progname); 142 return -1; 143 } 144 } 145 return 0; 146 } 147 148 /* 149 * Tx buffer error callback 150 */ 151 static void 152 flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count, 153 void *userdata) { 154 int i; 155 uint8_t port_id = (uintptr_t)userdata; 156 157 tx_stats->tx_drop[port_id] += count; 158 159 /* free the mbufs which failed from transmit */ 160 for (i = 0; i < count; i++) 161 rte_pktmbuf_free(unsent[i]); 162 163 } 164 165 static void 166 configure_tx_buffer(uint8_t port_id, uint16_t size) 167 { 168 int ret; 169 170 /* Initialize TX buffers */ 171 tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer", 172 RTE_ETH_TX_BUFFER_SIZE(size), 0, 173 rte_eth_dev_socket_id(port_id)); 174 if (tx_buffer[port_id] == NULL) 175 rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n", 176 (unsigned) port_id); 177 178 rte_eth_tx_buffer_init(tx_buffer[port_id], size); 179 180 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id], 181 flush_tx_error_callback, (void *)(intptr_t)port_id); 182 if (ret < 0) 183 rte_exit(EXIT_FAILURE, "Cannot set error callback for " 184 "tx buffer on port %u\n", (unsigned) port_id); 185 } 186 187 /* 188 * set up output ports so that all traffic on port gets sent out 189 * its paired port. Index using actual port numbers since that is 190 * what comes in the mbuf structure. 191 */ 192 static void 193 configure_output_ports(const struct port_info *ports) 194 { 195 int i; 196 if (ports->num_ports > RTE_MAX_ETHPORTS) 197 rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n", 198 (unsigned)RTE_MAX_ETHPORTS); 199 for (i = 0; i < ports->num_ports - 1; i+=2){ 200 uint8_t p1 = ports->id[i]; 201 uint8_t p2 = ports->id[i+1]; 202 output_ports[p1] = p2; 203 output_ports[p2] = p1; 204 205 configure_tx_buffer(p1, MBQ_CAPACITY); 206 configure_tx_buffer(p2, MBQ_CAPACITY); 207 208 } 209 } 210 211 /* 212 * This function performs routing of packets 213 * Just sends each input packet out an output port based solely on the input 214 * port it arrived on. 215 */ 216 static void 217 handle_packet(struct rte_mbuf *buf) 218 { 219 int sent; 220 const uint8_t in_port = buf->port; 221 const uint8_t out_port = output_ports[in_port]; 222 struct rte_eth_dev_tx_buffer *buffer = tx_buffer[out_port]; 223 224 sent = rte_eth_tx_buffer(out_port, client_id, buffer, buf); 225 if (sent) 226 tx_stats->tx[out_port] += sent; 227 228 } 229 230 /* 231 * Application main function - loops through 232 * receiving and processing packets. Never returns 233 */ 234 int 235 main(int argc, char *argv[]) 236 { 237 const struct rte_memzone *mz; 238 struct rte_ring *rx_ring; 239 struct rte_mempool *mp; 240 struct port_info *ports; 241 int need_flush = 0; /* indicates whether we have unsent packets */ 242 int retval; 243 void *pkts[PKT_READ_SIZE]; 244 uint16_t sent; 245 246 if ((retval = rte_eal_init(argc, argv)) < 0) 247 return -1; 248 argc -= retval; 249 argv += retval; 250 251 if (parse_app_args(argc, argv) < 0) 252 rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n"); 253 254 if (rte_eth_dev_count() == 0) 255 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n"); 256 257 rx_ring = rte_ring_lookup(get_rx_queue_name(client_id)); 258 if (rx_ring == NULL) 259 rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n"); 260 261 mp = rte_mempool_lookup(PKTMBUF_POOL_NAME); 262 if (mp == NULL) 263 rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n"); 264 265 mz = rte_memzone_lookup(MZ_PORT_INFO); 266 if (mz == NULL) 267 rte_exit(EXIT_FAILURE, "Cannot get port info structure\n"); 268 ports = mz->addr; 269 tx_stats = &(ports->tx_stats[client_id]); 270 271 configure_output_ports(ports); 272 273 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 274 275 printf("\nClient process %d handling packets\n", client_id); 276 printf("[Press Ctrl-C to quit ...]\n"); 277 278 for (;;) { 279 uint16_t i, rx_pkts = PKT_READ_SIZE; 280 uint8_t port; 281 282 /* try dequeuing max possible packets first, if that fails, get the 283 * most we can. Loop body should only execute once, maximum */ 284 while (rx_pkts > 0 && 285 unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, rx_pkts) != 0)) 286 rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), PKT_READ_SIZE); 287 288 if (unlikely(rx_pkts == 0)){ 289 if (need_flush) 290 for (port = 0; port < ports->num_ports; port++) { 291 sent = rte_eth_tx_buffer_flush(ports->id[port], client_id, 292 tx_buffer[port]); 293 if (unlikely(sent)) 294 tx_stats->tx[port] += sent; 295 } 296 need_flush = 0; 297 continue; 298 } 299 300 for (i = 0; i < rx_pkts; i++) 301 handle_packet(pkts[i]); 302 303 need_flush = 1; 304 } 305 } 306