app/test-pmd/txonly.c

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