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_launch.h> 19 #include <rte_per_lcore.h> 20 #include <rte_lcore.h> 21 #include <rte_branch_prediction.h> 22 #include <rte_debug.h> 23 #include <rte_ring.h> 24 #include <rte_log.h> 25 #include <rte_mempool.h> 26 #include <rte_memcpy.h> 27 #include <rte_mbuf.h> 28 #include <rte_interrupts.h> 29 #include <rte_ether.h> 30 #include <rte_ethdev.h> 31 #include <rte_malloc.h> 32 #include <rte_string_fns.h> 33 #include <rte_cycles.h> 34 #include <rte_efd.h> 35 #include <rte_hash.h> 36 37 #include "common.h" 38 #include "args.h" 39 #include "init.h" 40 41 #define MBUFS_PER_NODE 1536 42 #define MBUFS_PER_PORT 1536 43 #define MBUF_CACHE_SIZE 512 44 45 #define RTE_MP_RX_DESC_DEFAULT 512 46 #define RTE_MP_TX_DESC_DEFAULT 512 47 #define NODE_QUEUE_RINGSIZE 128 48 49 #define NO_FLAGS 0 50 51 /* The mbuf pool for packet rx */ 52 struct rte_mempool *pktmbuf_pool; 53 54 /* array of info/queues for nodes */ 55 struct node *nodes; 56 57 /* EFD table */ 58 struct rte_efd_table *efd_table; 59 60 /* Shared info between server and nodes */ 61 struct shared_info *info; 62 63 /** 64 * Initialise the mbuf pool for packet reception for the NIC, and any other 65 * buffer pools needed by the app - currently none. 66 */ 67 static int 68 init_mbuf_pools(void) 69 { 70 const unsigned int num_mbufs = (num_nodes * MBUFS_PER_NODE) + 71 (info->num_ports * MBUFS_PER_PORT); 72 73 /* 74 * Don't pass single-producer/single-consumer flags to mbuf create as it 75 * seems faster to use a cache instead 76 */ 77 printf("Creating mbuf pool '%s' [%u mbufs] ...\n", 78 PKTMBUF_POOL_NAME, num_mbufs); 79 pktmbuf_pool = rte_pktmbuf_pool_create(PKTMBUF_POOL_NAME, num_mbufs, 80 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); 81 82 return pktmbuf_pool == NULL; /* 0 on success */ 83 } 84 85 /** 86 * Initialise an individual port: 87 * - configure number of rx and tx rings 88 * - set up each rx ring, to pull from the main mbuf pool 89 * - set up each tx ring 90 * - start the port and report its status to stdout 91 */ 92 static int 93 init_port(uint16_t port_num) 94 { 95 /* for port configuration all features are off by default */ 96 struct rte_eth_conf port_conf = { 97 .rxmode = { 98 .mq_mode = ETH_MQ_RX_RSS, 99 }, 100 }; 101 const uint16_t rx_rings = 1, tx_rings = num_nodes; 102 uint16_t rx_ring_size = RTE_MP_RX_DESC_DEFAULT; 103 uint16_t tx_ring_size = RTE_MP_TX_DESC_DEFAULT; 104 struct rte_eth_dev_info dev_info; 105 struct rte_eth_txconf txconf; 106 107 uint16_t q; 108 int retval; 109 110 printf("Port %u init ... ", port_num); 111 fflush(stdout); 112 113 retval = rte_eth_dev_info_get(port_num, &dev_info); 114 if (retval != 0) 115 return retval; 116 117 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE) 118 port_conf.txmode.offloads |= 119 DEV_TX_OFFLOAD_MBUF_FAST_FREE; 120 121 /* 122 * Standard DPDK port initialisation - config port, then set up 123 * rx and tx rings. 124 */ 125 retval = rte_eth_dev_configure(port_num, rx_rings, tx_rings, &port_conf); 126 if (retval != 0) 127 return retval; 128 129 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port_num, &rx_ring_size, 130 &tx_ring_size); 131 if (retval != 0) 132 return retval; 133 134 for (q = 0; q < rx_rings; q++) { 135 retval = rte_eth_rx_queue_setup(port_num, q, rx_ring_size, 136 rte_eth_dev_socket_id(port_num), 137 NULL, pktmbuf_pool); 138 if (retval < 0) 139 return retval; 140 } 141 142 txconf = dev_info.default_txconf; 143 txconf.offloads = port_conf.txmode.offloads; 144 for (q = 0; q < tx_rings; q++) { 145 retval = rte_eth_tx_queue_setup(port_num, q, tx_ring_size, 146 rte_eth_dev_socket_id(port_num), 147 &txconf); 148 if (retval < 0) 149 return retval; 150 } 151 152 retval = rte_eth_promiscuous_enable(port_num); 153 if (retval != 0) 154 return retval; 155 156 retval = rte_eth_dev_start(port_num); 157 if (retval < 0) 158 return retval; 159 160 printf("done:\n"); 161 162 return 0; 163 } 164 165 /** 166 * Set up the DPDK rings which will be used to pass packets, via 167 * pointers, between the multi-process server and node processes. 168 * Each node needs one RX queue. 169 */ 170 static int 171 init_shm_rings(void) 172 { 173 unsigned int i; 174 unsigned int socket_id; 175 const char *q_name; 176 const unsigned int ringsize = NODE_QUEUE_RINGSIZE; 177 178 nodes = rte_malloc("node details", 179 sizeof(*nodes) * num_nodes, 0); 180 if (nodes == NULL) 181 rte_exit(EXIT_FAILURE, "Cannot allocate memory for " 182 "node program details\n"); 183 184 for (i = 0; i < num_nodes; i++) { 185 /* Create an RX queue for each node */ 186 socket_id = rte_socket_id(); 187 q_name = get_rx_queue_name(i); 188 nodes[i].rx_q = rte_ring_create(q_name, 189 ringsize, socket_id, 190 RING_F_SP_ENQ | RING_F_SC_DEQ); 191 if (nodes[i].rx_q == NULL) 192 rte_exit(EXIT_FAILURE, "Cannot create rx ring queue " 193 "for node %u\n", i); 194 } 195 return 0; 196 } 197 198 /* 199 * Create EFD table which will contain all the flows 200 * that will be distributed among the nodes 201 */ 202 203 /* Create EFD table. 8< */ 204 static void 205 create_efd_table(void) 206 { 207 uint8_t socket_id = rte_socket_id(); 208 209 /* create table */ 210 efd_table = rte_efd_create("flow table", num_flows * 2, sizeof(uint32_t), 211 1 << socket_id, socket_id); 212 213 if (efd_table == NULL) 214 rte_exit(EXIT_FAILURE, "Problem creating the flow table\n"); 215 } 216 217 static void 218 populate_efd_table(void) 219 { 220 unsigned int i; 221 int32_t ret; 222 uint32_t ip_dst; 223 uint8_t socket_id = rte_socket_id(); 224 uint64_t node_id; 225 226 /* Add flows in table */ 227 for (i = 0; i < num_flows; i++) { 228 node_id = i % num_nodes; 229 230 ip_dst = rte_cpu_to_be_32(i); 231 ret = rte_efd_update(efd_table, socket_id, 232 (void *)&ip_dst, (efd_value_t)node_id); 233 if (ret < 0) 234 rte_exit(EXIT_FAILURE, "Unable to add entry %u in " 235 "EFD table\n", i); 236 } 237 238 printf("EFD table: Adding 0x%x keys\n", num_flows); 239 } 240 /* >8 End of creation EFD table. */ 241 242 /* Check the link status of all ports in up to 9s, and print them finally */ 243 static void 244 check_all_ports_link_status(uint16_t port_num, uint32_t port_mask) 245 { 246 #define CHECK_INTERVAL 100 /* 100ms */ 247 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */ 248 uint8_t count, all_ports_up, print_flag = 0; 249 uint16_t portid; 250 struct rte_eth_link link; 251 int ret; 252 char link_status_text[RTE_ETH_LINK_MAX_STR_LEN]; 253 254 printf("\nChecking link status"); 255 fflush(stdout); 256 for (count = 0; count <= MAX_CHECK_TIME; count++) { 257 all_ports_up = 1; 258 for (portid = 0; portid < port_num; portid++) { 259 if ((port_mask & (1 << info->id[portid])) == 0) 260 continue; 261 memset(&link, 0, sizeof(link)); 262 ret = rte_eth_link_get_nowait(info->id[portid], &link); 263 if (ret < 0) { 264 all_ports_up = 0; 265 if (print_flag == 1) 266 printf("Port %u link get failed: %s\n", 267 portid, rte_strerror(-ret)); 268 continue; 269 } 270 /* print link status if flag set */ 271 if (print_flag == 1) { 272 rte_eth_link_to_str(link_status_text, 273 sizeof(link_status_text), &link); 274 printf("Port %d %s\n", info->id[portid], 275 link_status_text); 276 continue; 277 } 278 /* clear all_ports_up flag if any link down */ 279 if (link.link_status == ETH_LINK_DOWN) { 280 all_ports_up = 0; 281 break; 282 } 283 } 284 /* after finally printing all link status, get out */ 285 if (print_flag == 1) 286 break; 287 288 if (all_ports_up == 0) { 289 printf("."); 290 fflush(stdout); 291 rte_delay_ms(CHECK_INTERVAL); 292 } 293 294 /* set the print_flag if all ports up or timeout */ 295 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) { 296 print_flag = 1; 297 printf("done\n"); 298 } 299 } 300 } 301 302 /** 303 * Main init function for the multi-process server app, 304 * calls subfunctions to do each stage of the initialisation. 305 */ 306 int 307 init(int argc, char *argv[]) 308 { 309 int retval; 310 const struct rte_memzone *mz; 311 uint8_t i, total_ports; 312 313 /* init EAL, parsing EAL args */ 314 retval = rte_eal_init(argc, argv); 315 if (retval < 0) 316 return -1; 317 argc -= retval; 318 argv += retval; 319 320 /* get total number of ports */ 321 total_ports = rte_eth_dev_count_avail(); 322 323 /* set up array for port data */ 324 mz = rte_memzone_reserve(MZ_SHARED_INFO, sizeof(*info), 325 rte_socket_id(), NO_FLAGS); 326 if (mz == NULL) 327 rte_exit(EXIT_FAILURE, "Cannot reserve memory zone " 328 "for port information\n"); 329 memset(mz->addr, 0, sizeof(*info)); 330 info = mz->addr; 331 332 /* parse additional, application arguments */ 333 retval = parse_app_args(total_ports, argc, argv); 334 if (retval != 0) 335 return -1; 336 337 /* initialise mbuf pools */ 338 retval = init_mbuf_pools(); 339 if (retval != 0) 340 rte_exit(EXIT_FAILURE, "Cannot create needed mbuf pools\n"); 341 342 /* now initialise the ports we will use */ 343 for (i = 0; i < info->num_ports; i++) { 344 retval = init_port(info->id[i]); 345 if (retval != 0) 346 rte_exit(EXIT_FAILURE, "Cannot initialise port %u\n", 347 (unsigned int) i); 348 } 349 350 check_all_ports_link_status(info->num_ports, (~0x0)); 351 352 /* initialise the node queues/rings for inter-eu comms */ 353 init_shm_rings(); 354 355 /* Create the EFD table */ 356 create_efd_table(); 357 358 /* Populate the EFD table */ 359 populate_efd_table(); 360 361 /* Share the total number of nodes */ 362 info->num_nodes = num_nodes; 363 364 /* Share the total number of flows */ 365 info->num_flows = num_flows; 366 return 0; 367 } 368