1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2016-2017 Intel Corporation 3 */ 4 5 #include <stdint.h> 6 #include <stdio.h> 7 #include <string.h> 8 #include <sys/queue.h> 9 #include <errno.h> 10 #include <stdarg.h> 11 #include <inttypes.h> 12 13 #include <rte_common.h> 14 #include <rte_memory.h> 15 #include <rte_memzone.h> 16 #include <rte_eal.h> 17 #include <rte_byteorder.h> 18 #include <rte_atomic.h> 19 #include <rte_launch.h> 20 #include <rte_per_lcore.h> 21 #include <rte_lcore.h> 22 #include <rte_branch_prediction.h> 23 #include <rte_debug.h> 24 #include <rte_ring.h> 25 #include <rte_log.h> 26 #include <rte_mempool.h> 27 #include <rte_memcpy.h> 28 #include <rte_mbuf.h> 29 #include <rte_interrupts.h> 30 #include <rte_ether.h> 31 #include <rte_ethdev.h> 32 #include <rte_malloc.h> 33 #include <rte_string_fns.h> 34 #include <rte_cycles.h> 35 #include <rte_efd.h> 36 #include <rte_hash.h> 37 38 #include "common.h" 39 #include "args.h" 40 #include "init.h" 41 42 #define MBUFS_PER_NODE 1536 43 #define MBUFS_PER_PORT 1536 44 #define MBUF_CACHE_SIZE 512 45 46 #define RTE_MP_RX_DESC_DEFAULT 512 47 #define RTE_MP_TX_DESC_DEFAULT 512 48 #define NODE_QUEUE_RINGSIZE 128 49 50 #define NO_FLAGS 0 51 52 /* The mbuf pool for packet rx */ 53 struct rte_mempool *pktmbuf_pool; 54 55 /* array of info/queues for nodes */ 56 struct node *nodes; 57 58 /* EFD table */ 59 struct rte_efd_table *efd_table; 60 61 /* Shared info between server and nodes */ 62 struct shared_info *info; 63 64 /** 65 * Initialise the mbuf pool for packet reception for the NIC, and any other 66 * buffer pools needed by the app - currently none. 67 */ 68 static int 69 init_mbuf_pools(void) 70 { 71 const unsigned int num_mbufs = (num_nodes * MBUFS_PER_NODE) + 72 (info->num_ports * MBUFS_PER_PORT); 73 74 /* 75 * Don't pass single-producer/single-consumer flags to mbuf create as it 76 * seems faster to use a cache instead 77 */ 78 printf("Creating mbuf pool '%s' [%u mbufs] ...\n", 79 PKTMBUF_POOL_NAME, num_mbufs); 80 pktmbuf_pool = rte_pktmbuf_pool_create(PKTMBUF_POOL_NAME, num_mbufs, 81 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); 82 83 return pktmbuf_pool == NULL; /* 0 on success */ 84 } 85 86 /** 87 * Initialise an individual port: 88 * - configure number of rx and tx rings 89 * - set up each rx ring, to pull from the main mbuf pool 90 * - set up each tx ring 91 * - start the port and report its status to stdout 92 */ 93 static int 94 init_port(uint16_t port_num) 95 { 96 /* for port configuration all features are off by default */ 97 const struct rte_eth_conf port_conf = { 98 .rxmode = { 99 .mq_mode = ETH_MQ_RX_RSS 100 } 101 }; 102 const uint16_t rx_rings = 1, tx_rings = num_nodes; 103 uint16_t rx_ring_size = RTE_MP_RX_DESC_DEFAULT; 104 uint16_t tx_ring_size = RTE_MP_TX_DESC_DEFAULT; 105 106 uint16_t q; 107 int retval; 108 109 printf("Port %u init ... ", port_num); 110 fflush(stdout); 111 112 /* 113 * Standard DPDK port initialisation - config port, then set up 114 * rx and tx rings. 115 */ 116 retval = rte_eth_dev_configure(port_num, rx_rings, tx_rings, &port_conf); 117 if (retval != 0) 118 return retval; 119 120 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port_num, &rx_ring_size, 121 &tx_ring_size); 122 if (retval != 0) 123 return retval; 124 125 for (q = 0; q < rx_rings; q++) { 126 retval = rte_eth_rx_queue_setup(port_num, q, rx_ring_size, 127 rte_eth_dev_socket_id(port_num), 128 NULL, pktmbuf_pool); 129 if (retval < 0) 130 return retval; 131 } 132 133 for (q = 0; q < tx_rings; q++) { 134 retval = rte_eth_tx_queue_setup(port_num, q, tx_ring_size, 135 rte_eth_dev_socket_id(port_num), 136 NULL); 137 if (retval < 0) 138 return retval; 139 } 140 141 rte_eth_promiscuous_enable(port_num); 142 143 retval = rte_eth_dev_start(port_num); 144 if (retval < 0) 145 return retval; 146 147 printf("done:\n"); 148 149 return 0; 150 } 151 152 /** 153 * Set up the DPDK rings which will be used to pass packets, via 154 * pointers, between the multi-process server and node processes. 155 * Each node needs one RX queue. 156 */ 157 static int 158 init_shm_rings(void) 159 { 160 unsigned int i; 161 unsigned int socket_id; 162 const char *q_name; 163 const unsigned int ringsize = NODE_QUEUE_RINGSIZE; 164 165 nodes = rte_malloc("node details", 166 sizeof(*nodes) * num_nodes, 0); 167 if (nodes == NULL) 168 rte_exit(EXIT_FAILURE, "Cannot allocate memory for " 169 "node program details\n"); 170 171 for (i = 0; i < num_nodes; i++) { 172 /* Create an RX queue for each node */ 173 socket_id = rte_socket_id(); 174 q_name = get_rx_queue_name(i); 175 nodes[i].rx_q = rte_ring_create(q_name, 176 ringsize, socket_id, 177 RING_F_SP_ENQ | RING_F_SC_DEQ); 178 if (nodes[i].rx_q == NULL) 179 rte_exit(EXIT_FAILURE, "Cannot create rx ring queue " 180 "for node %u\n", i); 181 } 182 return 0; 183 } 184 185 /* 186 * Create EFD table which will contain all the flows 187 * that will be distributed among the nodes 188 */ 189 static void 190 create_efd_table(void) 191 { 192 uint8_t socket_id = rte_socket_id(); 193 194 /* create table */ 195 efd_table = rte_efd_create("flow table", num_flows * 2, sizeof(uint32_t), 196 1 << socket_id, socket_id); 197 198 if (efd_table == NULL) 199 rte_exit(EXIT_FAILURE, "Problem creating the flow table\n"); 200 } 201 202 static void 203 populate_efd_table(void) 204 { 205 unsigned int i; 206 int32_t ret; 207 uint32_t ip_dst; 208 uint8_t socket_id = rte_socket_id(); 209 uint64_t node_id; 210 211 /* Add flows in table */ 212 for (i = 0; i < num_flows; i++) { 213 node_id = i % num_nodes; 214 215 ip_dst = rte_cpu_to_be_32(i); 216 ret = rte_efd_update(efd_table, socket_id, 217 (void *)&ip_dst, (efd_value_t)node_id); 218 if (ret < 0) 219 rte_exit(EXIT_FAILURE, "Unable to add entry %u in " 220 "EFD table\n", i); 221 } 222 223 printf("EFD table: Adding 0x%x keys\n", num_flows); 224 } 225 226 /* Check the link status of all ports in up to 9s, and print them finally */ 227 static void 228 check_all_ports_link_status(uint16_t port_num, uint32_t port_mask) 229 { 230 #define CHECK_INTERVAL 100 /* 100ms */ 231 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */ 232 uint8_t count, all_ports_up, print_flag = 0; 233 uint16_t portid; 234 struct rte_eth_link link; 235 236 printf("\nChecking link status"); 237 fflush(stdout); 238 for (count = 0; count <= MAX_CHECK_TIME; count++) { 239 all_ports_up = 1; 240 for (portid = 0; portid < port_num; portid++) { 241 if ((port_mask & (1 << info->id[portid])) == 0) 242 continue; 243 memset(&link, 0, sizeof(link)); 244 rte_eth_link_get_nowait(info->id[portid], &link); 245 /* print link status if flag set */ 246 if (print_flag == 1) { 247 if (link.link_status) 248 printf( 249 "Port%d Link Up. Speed %u Mbps - %s\n", 250 info->id[portid], 251 link.link_speed, 252 (link.link_duplex == ETH_LINK_FULL_DUPLEX) ? 253 ("full-duplex") : ("half-duplex\n")); 254 else 255 printf("Port %d Link Down\n", 256 info->id[portid]); 257 continue; 258 } 259 /* clear all_ports_up flag if any link down */ 260 if (link.link_status == ETH_LINK_DOWN) { 261 all_ports_up = 0; 262 break; 263 } 264 } 265 /* after finally printing all link status, get out */ 266 if (print_flag == 1) 267 break; 268 269 if (all_ports_up == 0) { 270 printf("."); 271 fflush(stdout); 272 rte_delay_ms(CHECK_INTERVAL); 273 } 274 275 /* set the print_flag if all ports up or timeout */ 276 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) { 277 print_flag = 1; 278 printf("done\n"); 279 } 280 } 281 } 282 283 /** 284 * Main init function for the multi-process server app, 285 * calls subfunctions to do each stage of the initialisation. 286 */ 287 int 288 init(int argc, char *argv[]) 289 { 290 int retval; 291 const struct rte_memzone *mz; 292 uint8_t i, total_ports; 293 294 /* init EAL, parsing EAL args */ 295 retval = rte_eal_init(argc, argv); 296 if (retval < 0) 297 return -1; 298 argc -= retval; 299 argv += retval; 300 301 /* get total number of ports */ 302 total_ports = rte_eth_dev_count(); 303 304 /* set up array for port data */ 305 mz = rte_memzone_reserve(MZ_SHARED_INFO, sizeof(*info), 306 rte_socket_id(), NO_FLAGS); 307 if (mz == NULL) 308 rte_exit(EXIT_FAILURE, "Cannot reserve memory zone " 309 "for port information\n"); 310 memset(mz->addr, 0, sizeof(*info)); 311 info = mz->addr; 312 313 /* parse additional, application arguments */ 314 retval = parse_app_args(total_ports, argc, argv); 315 if (retval != 0) 316 return -1; 317 318 /* initialise mbuf pools */ 319 retval = init_mbuf_pools(); 320 if (retval != 0) 321 rte_exit(EXIT_FAILURE, "Cannot create needed mbuf pools\n"); 322 323 /* now initialise the ports we will use */ 324 for (i = 0; i < info->num_ports; i++) { 325 retval = init_port(info->id[i]); 326 if (retval != 0) 327 rte_exit(EXIT_FAILURE, "Cannot initialise port %u\n", 328 (unsigned int) i); 329 } 330 331 check_all_ports_link_status(info->num_ports, (~0x0)); 332 333 /* initialise the node queues/rings for inter-eu comms */ 334 init_shm_rings(); 335 336 /* Create the EFD table */ 337 create_efd_table(); 338 339 /* Populate the EFD table */ 340 populate_efd_table(); 341 342 /* Share the total number of nodes */ 343 info->num_nodes = num_nodes; 344 345 /* Share the total number of flows */ 346 info->num_flows = num_flows; 347 return 0; 348 } 349