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_lcore.h> 54 #include <rte_ring.h> 55 #include <rte_launch.h> 56 #include <rte_debug.h> 57 #include <rte_mempool.h> 58 #include <rte_mbuf.h> 59 #include <rte_interrupts.h> 60 #include <rte_pci.h> 61 #include <rte_ether.h> 62 #include <rte_ethdev.h> 63 #include <rte_string_fns.h> 64 65 #include "common.h" 66 67 /* Number of packets to attempt to read from queue */ 68 #define PKT_READ_SIZE ((uint16_t)32) 69 70 /* our client id number - tells us which rx queue to read, and NIC TX 71 * queue to write to. */ 72 static uint8_t client_id = 0; 73 74 #define MBQ_CAPACITY 32 75 76 /* maps input ports to output ports for packets */ 77 static uint16_t output_ports[RTE_MAX_ETHPORTS]; 78 79 /* buffers up a set of packet that are ready to send */ 80 struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS]; 81 82 /* shared data from server. We update statistics here */ 83 static volatile struct tx_stats *tx_stats; 84 85 86 /* 87 * print a usage message 88 */ 89 static void 90 usage(const char *progname) 91 { 92 printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname); 93 } 94 95 /* 96 * Convert the client id number from a string to an int. 97 */ 98 static int 99 parse_client_num(const char *client) 100 { 101 char *end = NULL; 102 unsigned long temp; 103 104 if (client == NULL || *client == '\0') 105 return -1; 106 107 temp = strtoul(client, &end, 10); 108 if (end == NULL || *end != '\0') 109 return -1; 110 111 client_id = (uint8_t)temp; 112 return 0; 113 } 114 115 /* 116 * Parse the application arguments to the client app. 117 */ 118 static int 119 parse_app_args(int argc, char *argv[]) 120 { 121 int option_index, opt; 122 char **argvopt = argv; 123 const char *progname = NULL; 124 static struct option lgopts[] = { /* no long options */ 125 {NULL, 0, 0, 0 } 126 }; 127 progname = argv[0]; 128 129 while ((opt = getopt_long(argc, argvopt, "n:", lgopts, 130 &option_index)) != EOF){ 131 switch (opt){ 132 case 'n': 133 if (parse_client_num(optarg) != 0){ 134 usage(progname); 135 return -1; 136 } 137 break; 138 default: 139 usage(progname); 140 return -1; 141 } 142 } 143 return 0; 144 } 145 146 /* 147 * Tx buffer error callback 148 */ 149 static void 150 flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count, 151 void *userdata) { 152 int i; 153 uint16_t port_id = (uintptr_t)userdata; 154 155 tx_stats->tx_drop[port_id] += count; 156 157 /* free the mbufs which failed from transmit */ 158 for (i = 0; i < count; i++) 159 rte_pktmbuf_free(unsent[i]); 160 161 } 162 163 static void 164 configure_tx_buffer(uint16_t port_id, uint16_t size) 165 { 166 int ret; 167 168 /* Initialize TX buffers */ 169 tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer", 170 RTE_ETH_TX_BUFFER_SIZE(size), 0, 171 rte_eth_dev_socket_id(port_id)); 172 if (tx_buffer[port_id] == NULL) 173 rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n", 174 port_id); 175 176 rte_eth_tx_buffer_init(tx_buffer[port_id], size); 177 178 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id], 179 flush_tx_error_callback, (void *)(intptr_t)port_id); 180 if (ret < 0) 181 rte_exit(EXIT_FAILURE, 182 "Cannot set error callback for tx buffer on port %u\n", 183 port_id); 184 } 185 186 /* 187 * set up output ports so that all traffic on port gets sent out 188 * its paired port. Index using actual port numbers since that is 189 * what comes in the mbuf structure. 190 */ 191 static void 192 configure_output_ports(const struct port_info *ports) 193 { 194 int i; 195 if (ports->num_ports > RTE_MAX_ETHPORTS) 196 rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n", 197 (unsigned)RTE_MAX_ETHPORTS); 198 for (i = 0; i < ports->num_ports - 1; i+=2){ 199 uint16_t p1 = ports->id[i]; 200 uint16_t p2 = ports->id[i+1]; 201 output_ports[p1] = p2; 202 output_ports[p2] = p1; 203 204 configure_tx_buffer(p1, MBQ_CAPACITY); 205 configure_tx_buffer(p2, MBQ_CAPACITY); 206 207 } 208 } 209 210 /* 211 * This function performs routing of packets 212 * Just sends each input packet out an output port based solely on the input 213 * port it arrived on. 214 */ 215 static void 216 handle_packet(struct rte_mbuf *buf) 217 { 218 int sent; 219 const uint16_t in_port = buf->port; 220 const uint16_t out_port = output_ports[in_port]; 221 struct rte_eth_dev_tx_buffer *buffer = tx_buffer[out_port]; 222 223 sent = rte_eth_tx_buffer(out_port, client_id, buffer, buf); 224 if (sent) 225 tx_stats->tx[out_port] += sent; 226 227 } 228 229 /* 230 * Application main function - loops through 231 * receiving and processing packets. Never returns 232 */ 233 int 234 main(int argc, char *argv[]) 235 { 236 const struct rte_memzone *mz; 237 struct rte_ring *rx_ring; 238 struct rte_mempool *mp; 239 struct port_info *ports; 240 int need_flush = 0; /* indicates whether we have unsent packets */ 241 int retval; 242 void *pkts[PKT_READ_SIZE]; 243 uint16_t sent; 244 245 if ((retval = rte_eal_init(argc, argv)) < 0) 246 return -1; 247 argc -= retval; 248 argv += retval; 249 250 if (parse_app_args(argc, argv) < 0) 251 rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n"); 252 253 if (rte_eth_dev_count() == 0) 254 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n"); 255 256 rx_ring = rte_ring_lookup(get_rx_queue_name(client_id)); 257 if (rx_ring == NULL) 258 rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n"); 259 260 mp = rte_mempool_lookup(PKTMBUF_POOL_NAME); 261 if (mp == NULL) 262 rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n"); 263 264 mz = rte_memzone_lookup(MZ_PORT_INFO); 265 if (mz == NULL) 266 rte_exit(EXIT_FAILURE, "Cannot get port info structure\n"); 267 ports = mz->addr; 268 tx_stats = &(ports->tx_stats[client_id]); 269 270 configure_output_ports(ports); 271 272 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 273 274 printf("\nClient process %d handling packets\n", client_id); 275 printf("[Press Ctrl-C to quit ...]\n"); 276 277 for (;;) { 278 uint16_t i, rx_pkts; 279 uint16_t port; 280 281 rx_pkts = rte_ring_dequeue_burst(rx_ring, pkts, 282 PKT_READ_SIZE, NULL); 283 284 if (unlikely(rx_pkts == 0)){ 285 if (need_flush) 286 for (port = 0; port < ports->num_ports; port++) { 287 sent = rte_eth_tx_buffer_flush(ports->id[port], client_id, 288 tx_buffer[port]); 289 if (unlikely(sent)) 290 tx_stats->tx[port] += sent; 291 } 292 need_flush = 0; 293 continue; 294 } 295 296 for (i = 0; i < rx_pkts; i++) 297 handle_packet(pkts[i]); 298 299 need_flush = 1; 300 } 301 } 302