1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 #include <stdarg.h> 6 #include <string.h> 7 #include <stdio.h> 8 #include <errno.h> 9 #include <stdint.h> 10 #include <unistd.h> 11 #include <inttypes.h> 12 13 #include <sys/queue.h> 14 #include <sys/stat.h> 15 16 #include <rte_common.h> 17 #include <rte_byteorder.h> 18 #include <rte_log.h> 19 #include <rte_debug.h> 20 #include <rte_cycles.h> 21 #include <rte_memory.h> 22 #include <rte_memcpy.h> 23 #include <rte_launch.h> 24 #include <rte_eal.h> 25 #include <rte_per_lcore.h> 26 #include <rte_lcore.h> 27 #include <rte_branch_prediction.h> 28 #include <rte_mempool.h> 29 #include <rte_mbuf.h> 30 #include <rte_interrupts.h> 31 #include <rte_pci.h> 32 #include <rte_ether.h> 33 #include <rte_ethdev.h> 34 #include <rte_ip.h> 35 #include <rte_tcp.h> 36 #include <rte_udp.h> 37 #include <rte_string_fns.h> 38 #include <rte_flow.h> 39 40 #include "testpmd.h" 41 42 struct tx_timestamp { 43 rte_be32_t signature; 44 rte_be16_t pkt_idx; 45 rte_be16_t queue_idx; 46 rte_be64_t ts; 47 }; 48 49 /* use RFC863 Discard Protocol */ 50 uint16_t tx_udp_src_port = 9; 51 uint16_t tx_udp_dst_port = 9; 52 53 /* use RFC5735 / RFC2544 reserved network test addresses */ 54 uint32_t tx_ip_src_addr = (198U << 24) | (18 << 16) | (0 << 8) | 1; 55 uint32_t tx_ip_dst_addr = (198U << 24) | (18 << 16) | (0 << 8) | 2; 56 57 #define IP_DEFTTL 64 /* from RFC 1340. */ 58 59 static struct rte_ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */ 60 RTE_DEFINE_PER_LCORE(uint8_t, _ip_var); /**< IP address variation */ 61 static struct rte_udp_hdr pkt_udp_hdr; /**< UDP header of tx packets. */ 62 RTE_DEFINE_PER_LCORE(uint64_t, timestamp_qskew); 63 /**< Timestamp offset per queue */ 64 RTE_DEFINE_PER_LCORE(uint32_t, timestamp_idone); /**< Timestamp init done. */ 65 66 static uint64_t timestamp_mask; /**< Timestamp dynamic flag mask */ 67 static int32_t timestamp_off; /**< Timestamp dynamic field offset */ 68 static bool timestamp_enable; /**< Timestamp enable */ 69 static uint32_t timestamp_init_req; /**< Timestamp initialization request. */ 70 static uint64_t timestamp_initial[RTE_MAX_ETHPORTS]; 71 72 static void 73 copy_buf_to_pkt_segs(void* buf, unsigned len, struct rte_mbuf *pkt, 74 unsigned offset) 75 { 76 struct rte_mbuf *seg; 77 void *seg_buf; 78 unsigned copy_len; 79 80 seg = pkt; 81 while (offset >= seg->data_len) { 82 offset -= seg->data_len; 83 seg = seg->next; 84 } 85 copy_len = seg->data_len - offset; 86 seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset); 87 while (len > copy_len) { 88 rte_memcpy(seg_buf, buf, (size_t) copy_len); 89 len -= copy_len; 90 buf = ((char*) buf + copy_len); 91 seg = seg->next; 92 seg_buf = rte_pktmbuf_mtod(seg, char *); 93 copy_len = seg->data_len; 94 } 95 rte_memcpy(seg_buf, buf, (size_t) len); 96 } 97 98 static inline void 99 copy_buf_to_pkt(void* buf, unsigned len, struct rte_mbuf *pkt, unsigned offset) 100 { 101 if (offset + len <= pkt->data_len) { 102 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset), 103 buf, (size_t) len); 104 return; 105 } 106 copy_buf_to_pkt_segs(buf, len, pkt, offset); 107 } 108 109 static void 110 setup_pkt_udp_ip_headers(struct rte_ipv4_hdr *ip_hdr, 111 struct rte_udp_hdr *udp_hdr, 112 uint16_t pkt_data_len) 113 { 114 uint16_t *ptr16; 115 uint32_t ip_cksum; 116 uint16_t pkt_len; 117 118 /* 119 * Initialize UDP header. 120 */ 121 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct rte_udp_hdr)); 122 udp_hdr->src_port = rte_cpu_to_be_16(tx_udp_src_port); 123 udp_hdr->dst_port = rte_cpu_to_be_16(tx_udp_dst_port); 124 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len); 125 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */ 126 127 /* 128 * Initialize IP header. 129 */ 130 pkt_len = (uint16_t) (pkt_len + sizeof(struct rte_ipv4_hdr)); 131 ip_hdr->version_ihl = RTE_IPV4_VHL_DEF; 132 ip_hdr->type_of_service = 0; 133 ip_hdr->fragment_offset = 0; 134 ip_hdr->time_to_live = IP_DEFTTL; 135 ip_hdr->next_proto_id = IPPROTO_UDP; 136 ip_hdr->packet_id = 0; 137 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len); 138 ip_hdr->src_addr = rte_cpu_to_be_32(tx_ip_src_addr); 139 ip_hdr->dst_addr = rte_cpu_to_be_32(tx_ip_dst_addr); 140 141 /* 142 * Compute IP header checksum. 143 */ 144 ptr16 = (unaligned_uint16_t*) ip_hdr; 145 ip_cksum = 0; 146 ip_cksum += ptr16[0]; ip_cksum += ptr16[1]; 147 ip_cksum += ptr16[2]; ip_cksum += ptr16[3]; 148 ip_cksum += ptr16[4]; 149 ip_cksum += ptr16[6]; ip_cksum += ptr16[7]; 150 ip_cksum += ptr16[8]; ip_cksum += ptr16[9]; 151 152 /* 153 * Reduce 32 bit checksum to 16 bits and complement it. 154 */ 155 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) + 156 (ip_cksum & 0x0000FFFF); 157 if (ip_cksum > 65535) 158 ip_cksum -= 65535; 159 ip_cksum = (~ip_cksum) & 0x0000FFFF; 160 if (ip_cksum == 0) 161 ip_cksum = 0xFFFF; 162 ip_hdr->hdr_checksum = (uint16_t) ip_cksum; 163 } 164 165 static inline void 166 update_pkt_header(struct rte_mbuf *pkt, uint32_t total_pkt_len) 167 { 168 struct rte_ipv4_hdr *ip_hdr; 169 struct rte_udp_hdr *udp_hdr; 170 uint16_t pkt_data_len; 171 uint16_t pkt_len; 172 173 pkt_data_len = (uint16_t) (total_pkt_len - ( 174 sizeof(struct rte_ether_hdr) + 175 sizeof(struct rte_ipv4_hdr) + 176 sizeof(struct rte_udp_hdr))); 177 /* update UDP packet length */ 178 udp_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_udp_hdr *, 179 sizeof(struct rte_ether_hdr) + 180 sizeof(struct rte_ipv4_hdr)); 181 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct rte_udp_hdr)); 182 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_len); 183 184 /* update IP packet length and checksum */ 185 ip_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_ipv4_hdr *, 186 sizeof(struct rte_ether_hdr)); 187 ip_hdr->hdr_checksum = 0; 188 pkt_len = (uint16_t) (pkt_len + sizeof(struct rte_ipv4_hdr)); 189 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_len); 190 ip_hdr->hdr_checksum = rte_ipv4_cksum(ip_hdr); 191 } 192 193 static inline bool 194 pkt_burst_prepare(struct rte_mbuf *pkt, struct rte_mempool *mbp, 195 struct rte_ether_hdr *eth_hdr, const uint16_t vlan_tci, 196 const uint16_t vlan_tci_outer, const uint64_t ol_flags, 197 const uint16_t idx, const struct fwd_stream *fs) 198 { 199 struct rte_mbuf *pkt_segs[RTE_MAX_SEGS_PER_PKT]; 200 struct rte_mbuf *pkt_seg; 201 uint32_t nb_segs, pkt_len; 202 uint8_t i; 203 204 if (unlikely(tx_pkt_split == TX_PKT_SPLIT_RND)) 205 nb_segs = rte_rand() % tx_pkt_nb_segs + 1; 206 else 207 nb_segs = tx_pkt_nb_segs; 208 209 if (nb_segs > 1) { 210 if (rte_mempool_get_bulk(mbp, (void **)pkt_segs, nb_segs - 1)) 211 return false; 212 } 213 214 rte_pktmbuf_reset_headroom(pkt); 215 pkt->data_len = tx_pkt_seg_lengths[0]; 216 pkt->ol_flags &= RTE_MBUF_F_EXTERNAL; 217 pkt->ol_flags |= ol_flags; 218 pkt->vlan_tci = vlan_tci; 219 pkt->vlan_tci_outer = vlan_tci_outer; 220 pkt->l2_len = sizeof(struct rte_ether_hdr); 221 pkt->l3_len = sizeof(struct rte_ipv4_hdr); 222 223 pkt_len = pkt->data_len; 224 pkt_seg = pkt; 225 for (i = 1; i < nb_segs; i++) { 226 pkt_seg->next = pkt_segs[i - 1]; 227 pkt_seg = pkt_seg->next; 228 pkt_seg->data_len = tx_pkt_seg_lengths[i]; 229 pkt_len += pkt_seg->data_len; 230 } 231 pkt_seg->next = NULL; /* Last segment of packet. */ 232 /* 233 * Copy headers in first packet segment(s). 234 */ 235 copy_buf_to_pkt(eth_hdr, sizeof(*eth_hdr), pkt, 0); 236 copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt, 237 sizeof(struct rte_ether_hdr)); 238 if (txonly_multi_flow) { 239 uint8_t ip_var = RTE_PER_LCORE(_ip_var); 240 struct rte_ipv4_hdr *ip_hdr; 241 uint32_t addr; 242 243 ip_hdr = rte_pktmbuf_mtod_offset(pkt, 244 struct rte_ipv4_hdr *, 245 sizeof(struct rte_ether_hdr)); 246 /* 247 * Generate multiple flows by varying IP src addr. This 248 * enables packets are well distributed by RSS in 249 * receiver side if any and txonly mode can be a decent 250 * packet generator for developer's quick performance 251 * regression test. 252 */ 253 addr = (tx_ip_dst_addr | (ip_var++ << 8)) + rte_lcore_id(); 254 ip_hdr->src_addr = rte_cpu_to_be_32(addr); 255 RTE_PER_LCORE(_ip_var) = ip_var; 256 } 257 copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt, 258 sizeof(struct rte_ether_hdr) + 259 sizeof(struct rte_ipv4_hdr)); 260 261 if (unlikely(tx_pkt_split == TX_PKT_SPLIT_RND) || txonly_multi_flow) 262 update_pkt_header(pkt, pkt_len); 263 264 if (unlikely(timestamp_enable)) { 265 uint64_t skew = RTE_PER_LCORE(timestamp_qskew); 266 struct tx_timestamp timestamp_mark; 267 268 if (unlikely(timestamp_init_req != 269 RTE_PER_LCORE(timestamp_idone))) { 270 struct rte_eth_dev_info dev_info; 271 unsigned int txqs_n; 272 uint64_t phase; 273 int ret; 274 275 ret = eth_dev_info_get_print_err(fs->tx_port, &dev_info); 276 if (ret != 0) { 277 TESTPMD_LOG(ERR, 278 "Failed to get device info for port %d," 279 "could not finish timestamp init", 280 fs->tx_port); 281 return false; 282 } 283 txqs_n = dev_info.nb_tx_queues; 284 phase = tx_pkt_times_inter * fs->tx_queue / 285 (txqs_n ? txqs_n : 1); 286 /* 287 * Initialize the scheduling time phase shift 288 * depending on queue index. 289 */ 290 skew = timestamp_initial[fs->tx_port] + 291 tx_pkt_times_inter + phase; 292 RTE_PER_LCORE(timestamp_qskew) = skew; 293 RTE_PER_LCORE(timestamp_idone) = timestamp_init_req; 294 } 295 timestamp_mark.pkt_idx = rte_cpu_to_be_16(idx); 296 timestamp_mark.queue_idx = rte_cpu_to_be_16(fs->tx_queue); 297 timestamp_mark.signature = rte_cpu_to_be_32(0xBEEFC0DE); 298 if (unlikely(!idx)) { 299 skew += tx_pkt_times_inter; 300 pkt->ol_flags |= timestamp_mask; 301 *RTE_MBUF_DYNFIELD 302 (pkt, timestamp_off, uint64_t *) = skew; 303 RTE_PER_LCORE(timestamp_qskew) = skew; 304 timestamp_mark.ts = rte_cpu_to_be_64(skew); 305 } else if (tx_pkt_times_intra) { 306 skew += tx_pkt_times_intra; 307 pkt->ol_flags |= timestamp_mask; 308 *RTE_MBUF_DYNFIELD 309 (pkt, timestamp_off, uint64_t *) = skew; 310 RTE_PER_LCORE(timestamp_qskew) = skew; 311 timestamp_mark.ts = rte_cpu_to_be_64(skew); 312 } else { 313 timestamp_mark.ts = RTE_BE64(0); 314 } 315 copy_buf_to_pkt(×tamp_mark, sizeof(timestamp_mark), pkt, 316 sizeof(struct rte_ether_hdr) + 317 sizeof(struct rte_ipv4_hdr) + 318 sizeof(pkt_udp_hdr)); 319 } 320 /* 321 * Complete first mbuf of packet and append it to the 322 * burst of packets to be transmitted. 323 */ 324 pkt->nb_segs = nb_segs; 325 pkt->pkt_len = pkt_len; 326 327 return true; 328 } 329 330 /* 331 * Transmit a burst of multi-segments packets. 332 */ 333 static void 334 pkt_burst_transmit(struct fwd_stream *fs) 335 { 336 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 337 struct rte_port *txp; 338 struct rte_mbuf *pkt; 339 struct rte_mempool *mbp; 340 struct rte_ether_hdr eth_hdr; 341 uint16_t nb_tx; 342 uint16_t nb_pkt; 343 uint16_t vlan_tci, vlan_tci_outer; 344 uint32_t retry; 345 uint64_t ol_flags = 0; 346 uint64_t tx_offloads; 347 uint64_t start_tsc = 0; 348 349 get_start_cycles(&start_tsc); 350 351 mbp = current_fwd_lcore()->mbp; 352 txp = &ports[fs->tx_port]; 353 tx_offloads = txp->dev_conf.txmode.offloads; 354 vlan_tci = txp->tx_vlan_id; 355 vlan_tci_outer = txp->tx_vlan_id_outer; 356 if (tx_offloads & RTE_ETH_TX_OFFLOAD_VLAN_INSERT) 357 ol_flags = RTE_MBUF_F_TX_VLAN; 358 if (tx_offloads & RTE_ETH_TX_OFFLOAD_QINQ_INSERT) 359 ol_flags |= RTE_MBUF_F_TX_QINQ; 360 if (tx_offloads & RTE_ETH_TX_OFFLOAD_MACSEC_INSERT) 361 ol_flags |= RTE_MBUF_F_TX_MACSEC; 362 363 /* 364 * Initialize Ethernet header. 365 */ 366 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr], ð_hdr.dst_addr); 367 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr, ð_hdr.src_addr); 368 eth_hdr.ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4); 369 370 if (rte_mempool_get_bulk(mbp, (void **)pkts_burst, 371 nb_pkt_per_burst) == 0) { 372 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 373 if (unlikely(!pkt_burst_prepare(pkts_burst[nb_pkt], mbp, 374 ð_hdr, vlan_tci, 375 vlan_tci_outer, 376 ol_flags, 377 nb_pkt, fs))) { 378 rte_mempool_put_bulk(mbp, 379 (void **)&pkts_burst[nb_pkt], 380 nb_pkt_per_burst - nb_pkt); 381 break; 382 } 383 } 384 } else { 385 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) { 386 pkt = rte_mbuf_raw_alloc(mbp); 387 if (pkt == NULL) 388 break; 389 if (unlikely(!pkt_burst_prepare(pkt, mbp, ð_hdr, 390 vlan_tci, 391 vlan_tci_outer, 392 ol_flags, 393 nb_pkt, fs))) { 394 rte_pktmbuf_free(pkt); 395 break; 396 } 397 pkts_burst[nb_pkt] = pkt; 398 } 399 } 400 401 if (nb_pkt == 0) 402 return; 403 404 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt); 405 406 /* 407 * Retry if necessary 408 */ 409 if (unlikely(nb_tx < nb_pkt) && fs->retry_enabled) { 410 retry = 0; 411 while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) { 412 rte_delay_us(burst_tx_delay_time); 413 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, 414 &pkts_burst[nb_tx], nb_pkt - nb_tx); 415 } 416 } 417 fs->tx_packets += nb_tx; 418 419 if (txonly_multi_flow) 420 RTE_PER_LCORE(_ip_var) -= nb_pkt - nb_tx; 421 422 inc_tx_burst_stats(fs, nb_tx); 423 if (unlikely(nb_tx < nb_pkt)) { 424 if (verbose_level > 0 && fs->fwd_dropped == 0) 425 printf("port %d tx_queue %d - drop " 426 "(nb_pkt:%u - nb_tx:%u)=%u packets\n", 427 fs->tx_port, fs->tx_queue, 428 (unsigned) nb_pkt, (unsigned) nb_tx, 429 (unsigned) (nb_pkt - nb_tx)); 430 fs->fwd_dropped += (nb_pkt - nb_tx); 431 do { 432 rte_pktmbuf_free(pkts_burst[nb_tx]); 433 } while (++nb_tx < nb_pkt); 434 } 435 436 get_end_cycles(fs, start_tsc); 437 } 438 439 static int 440 tx_only_begin(portid_t pi) 441 { 442 uint16_t pkt_hdr_len, pkt_data_len; 443 int dynf; 444 445 pkt_hdr_len = (uint16_t)(sizeof(struct rte_ether_hdr) + 446 sizeof(struct rte_ipv4_hdr) + 447 sizeof(struct rte_udp_hdr)); 448 pkt_data_len = tx_pkt_length - pkt_hdr_len; 449 450 if ((tx_pkt_split == TX_PKT_SPLIT_RND || txonly_multi_flow) && 451 tx_pkt_seg_lengths[0] < pkt_hdr_len) { 452 TESTPMD_LOG(ERR, 453 "Random segment number or multiple flow is enabled, " 454 "but tx_pkt_seg_lengths[0] %u < %u (needed)\n", 455 tx_pkt_seg_lengths[0], pkt_hdr_len); 456 return -EINVAL; 457 } 458 459 setup_pkt_udp_ip_headers(&pkt_ip_hdr, &pkt_udp_hdr, pkt_data_len); 460 461 timestamp_enable = false; 462 timestamp_mask = 0; 463 timestamp_off = -1; 464 RTE_PER_LCORE(timestamp_qskew) = 0; 465 dynf = rte_mbuf_dynflag_lookup 466 (RTE_MBUF_DYNFLAG_TX_TIMESTAMP_NAME, NULL); 467 if (dynf >= 0) 468 timestamp_mask = 1ULL << dynf; 469 dynf = rte_mbuf_dynfield_lookup 470 (RTE_MBUF_DYNFIELD_TIMESTAMP_NAME, NULL); 471 if (dynf >= 0) 472 timestamp_off = dynf; 473 timestamp_enable = tx_pkt_times_inter && 474 timestamp_mask && 475 timestamp_off >= 0 && 476 !rte_eth_read_clock(pi, ×tamp_initial[pi]); 477 478 if (timestamp_enable) { 479 pkt_hdr_len += sizeof(struct tx_timestamp); 480 481 if (tx_pkt_split == TX_PKT_SPLIT_RND) { 482 if (tx_pkt_seg_lengths[0] < pkt_hdr_len) { 483 TESTPMD_LOG(ERR, 484 "Time stamp and random segment number are enabled, " 485 "but tx_pkt_seg_lengths[0] %u < %u (needed)\n", 486 tx_pkt_seg_lengths[0], pkt_hdr_len); 487 return -EINVAL; 488 } 489 } else { 490 uint16_t total = 0; 491 uint8_t i; 492 493 for (i = 0; i < tx_pkt_nb_segs; i++) { 494 total += tx_pkt_seg_lengths[i]; 495 if (total >= pkt_hdr_len) 496 break; 497 } 498 499 if (total < pkt_hdr_len) { 500 TESTPMD_LOG(ERR, 501 "Not enough Tx segment space for time stamp info, " 502 "total %u < %u (needed)\n", 503 total, pkt_hdr_len); 504 return -EINVAL; 505 } 506 } 507 timestamp_init_req++; 508 } 509 510 /* Make sure all settings are visible on forwarding cores.*/ 511 rte_wmb(); 512 return 0; 513 } 514 515 struct fwd_engine tx_only_engine = { 516 .fwd_mode_name = "txonly", 517 .port_fwd_begin = tx_only_begin, 518 .port_fwd_end = NULL, 519 .packet_fwd = pkt_burst_transmit, 520 }; 521