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 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 struct rte_eth_dev_info dev_info; 106 struct rte_eth_txconf txconf; 107 108 uint16_t q; 109 int retval; 110 111 printf("Port %u init ... ", port_num); 112 fflush(stdout); 113 114 retval = rte_eth_dev_info_get(port_num, &dev_info); 115 if (retval != 0) 116 return retval; 117 118 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE) 119 port_conf.txmode.offloads |= 120 DEV_TX_OFFLOAD_MBUF_FAST_FREE; 121 122 /* 123 * Standard DPDK port initialisation - config port, then set up 124 * rx and tx rings. 125 */ 126 retval = rte_eth_dev_configure(port_num, rx_rings, tx_rings, &port_conf); 127 if (retval != 0) 128 return retval; 129 130 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port_num, &rx_ring_size, 131 &tx_ring_size); 132 if (retval != 0) 133 return retval; 134 135 for (q = 0; q < rx_rings; q++) { 136 retval = rte_eth_rx_queue_setup(port_num, q, rx_ring_size, 137 rte_eth_dev_socket_id(port_num), 138 NULL, pktmbuf_pool); 139 if (retval < 0) 140 return retval; 141 } 142 143 txconf = dev_info.default_txconf; 144 txconf.offloads = port_conf.txmode.offloads; 145 for (q = 0; q < tx_rings; q++) { 146 retval = rte_eth_tx_queue_setup(port_num, q, tx_ring_size, 147 rte_eth_dev_socket_id(port_num), 148 &txconf); 149 if (retval < 0) 150 return retval; 151 } 152 153 retval = rte_eth_promiscuous_enable(port_num); 154 if (retval != 0) 155 return retval; 156 157 retval = rte_eth_dev_start(port_num); 158 if (retval < 0) 159 return retval; 160 161 printf("done:\n"); 162 163 return 0; 164 } 165 166 /** 167 * Set up the DPDK rings which will be used to pass packets, via 168 * pointers, between the multi-process server and node processes. 169 * Each node needs one RX queue. 170 */ 171 static int 172 init_shm_rings(void) 173 { 174 unsigned int i; 175 unsigned int socket_id; 176 const char *q_name; 177 const unsigned int ringsize = NODE_QUEUE_RINGSIZE; 178 179 nodes = rte_malloc("node details", 180 sizeof(*nodes) * num_nodes, 0); 181 if (nodes == NULL) 182 rte_exit(EXIT_FAILURE, "Cannot allocate memory for " 183 "node program details\n"); 184 185 for (i = 0; i < num_nodes; i++) { 186 /* Create an RX queue for each node */ 187 socket_id = rte_socket_id(); 188 q_name = get_rx_queue_name(i); 189 nodes[i].rx_q = rte_ring_create(q_name, 190 ringsize, socket_id, 191 RING_F_SP_ENQ | RING_F_SC_DEQ); 192 if (nodes[i].rx_q == NULL) 193 rte_exit(EXIT_FAILURE, "Cannot create rx ring queue " 194 "for node %u\n", i); 195 } 196 return 0; 197 } 198 199 /* 200 * Create EFD table which will contain all the flows 201 * that will be distributed among the nodes 202 */ 203 static void 204 create_efd_table(void) 205 { 206 uint8_t socket_id = rte_socket_id(); 207 208 /* create table */ 209 efd_table = rte_efd_create("flow table", num_flows * 2, sizeof(uint32_t), 210 1 << socket_id, socket_id); 211 212 if (efd_table == NULL) 213 rte_exit(EXIT_FAILURE, "Problem creating the flow table\n"); 214 } 215 216 static void 217 populate_efd_table(void) 218 { 219 unsigned int i; 220 int32_t ret; 221 uint32_t ip_dst; 222 uint8_t socket_id = rte_socket_id(); 223 uint64_t node_id; 224 225 /* Add flows in table */ 226 for (i = 0; i < num_flows; i++) { 227 node_id = i % num_nodes; 228 229 ip_dst = rte_cpu_to_be_32(i); 230 ret = rte_efd_update(efd_table, socket_id, 231 (void *)&ip_dst, (efd_value_t)node_id); 232 if (ret < 0) 233 rte_exit(EXIT_FAILURE, "Unable to add entry %u in " 234 "EFD table\n", i); 235 } 236 237 printf("EFD table: Adding 0x%x keys\n", num_flows); 238 } 239 240 /* Check the link status of all ports in up to 9s, and print them finally */ 241 static void 242 check_all_ports_link_status(uint16_t port_num, uint32_t port_mask) 243 { 244 #define CHECK_INTERVAL 100 /* 100ms */ 245 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */ 246 uint8_t count, all_ports_up, print_flag = 0; 247 uint16_t portid; 248 struct rte_eth_link link; 249 int ret; 250 char link_status_text[RTE_ETH_LINK_MAX_STR_LEN]; 251 252 printf("\nChecking link status"); 253 fflush(stdout); 254 for (count = 0; count <= MAX_CHECK_TIME; count++) { 255 all_ports_up = 1; 256 for (portid = 0; portid < port_num; portid++) { 257 if ((port_mask & (1 << info->id[portid])) == 0) 258 continue; 259 memset(&link, 0, sizeof(link)); 260 ret = rte_eth_link_get_nowait(info->id[portid], &link); 261 if (ret < 0) { 262 all_ports_up = 0; 263 if (print_flag == 1) 264 printf("Port %u link get failed: %s\n", 265 portid, rte_strerror(-ret)); 266 continue; 267 } 268 /* print link status if flag set */ 269 if (print_flag == 1) { 270 rte_eth_link_to_str(link_status_text, 271 sizeof(link_status_text), &link); 272 printf("Port %d %s\n", info->id[portid], 273 link_status_text); 274 continue; 275 } 276 /* clear all_ports_up flag if any link down */ 277 if (link.link_status == ETH_LINK_DOWN) { 278 all_ports_up = 0; 279 break; 280 } 281 } 282 /* after finally printing all link status, get out */ 283 if (print_flag == 1) 284 break; 285 286 if (all_ports_up == 0) { 287 printf("."); 288 fflush(stdout); 289 rte_delay_ms(CHECK_INTERVAL); 290 } 291 292 /* set the print_flag if all ports up or timeout */ 293 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) { 294 print_flag = 1; 295 printf("done\n"); 296 } 297 } 298 } 299 300 /** 301 * Main init function for the multi-process server app, 302 * calls subfunctions to do each stage of the initialisation. 303 */ 304 int 305 init(int argc, char *argv[]) 306 { 307 int retval; 308 const struct rte_memzone *mz; 309 uint8_t i, total_ports; 310 311 /* init EAL, parsing EAL args */ 312 retval = rte_eal_init(argc, argv); 313 if (retval < 0) 314 return -1; 315 argc -= retval; 316 argv += retval; 317 318 /* get total number of ports */ 319 total_ports = rte_eth_dev_count_avail(); 320 321 /* set up array for port data */ 322 mz = rte_memzone_reserve(MZ_SHARED_INFO, sizeof(*info), 323 rte_socket_id(), NO_FLAGS); 324 if (mz == NULL) 325 rte_exit(EXIT_FAILURE, "Cannot reserve memory zone " 326 "for port information\n"); 327 memset(mz->addr, 0, sizeof(*info)); 328 info = mz->addr; 329 330 /* parse additional, application arguments */ 331 retval = parse_app_args(total_ports, argc, argv); 332 if (retval != 0) 333 return -1; 334 335 /* initialise mbuf pools */ 336 retval = init_mbuf_pools(); 337 if (retval != 0) 338 rte_exit(EXIT_FAILURE, "Cannot create needed mbuf pools\n"); 339 340 /* now initialise the ports we will use */ 341 for (i = 0; i < info->num_ports; i++) { 342 retval = init_port(info->id[i]); 343 if (retval != 0) 344 rte_exit(EXIT_FAILURE, "Cannot initialise port %u\n", 345 (unsigned int) i); 346 } 347 348 check_all_ports_link_status(info->num_ports, (~0x0)); 349 350 /* initialise the node queues/rings for inter-eu comms */ 351 init_shm_rings(); 352 353 /* Create the EFD table */ 354 create_efd_table(); 355 356 /* Populate the EFD table */ 357 populate_efd_table(); 358 359 /* Share the total number of nodes */ 360 info->num_nodes = num_nodes; 361 362 /* Share the total number of flows */ 363 info->num_flows = num_flows; 364 return 0; 365 } 366