1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2014 John W. Linville <linville@tuxdriver.com> 3 * Originally based upon librte_pmd_pcap code: 4 * Copyright(c) 2010-2015 Intel Corporation. 5 * Copyright(c) 2014 6WIND S.A. 6 * All rights reserved. 7 */ 8 9 #include <rte_string_fns.h> 10 #include <rte_mbuf.h> 11 #include <rte_ethdev_driver.h> 12 #include <rte_ethdev_vdev.h> 13 #include <rte_malloc.h> 14 #include <rte_kvargs.h> 15 #include <rte_bus_vdev.h> 16 17 #include <errno.h> 18 #include <linux/if_ether.h> 19 #include <linux/if_packet.h> 20 #include <arpa/inet.h> 21 #include <net/if.h> 22 #include <sys/types.h> 23 #include <sys/socket.h> 24 #include <sys/ioctl.h> 25 #include <string.h> 26 #include <sys/mman.h> 27 #include <unistd.h> 28 #include <poll.h> 29 30 #define ETH_AF_PACKET_IFACE_ARG "iface" 31 #define ETH_AF_PACKET_NUM_Q_ARG "qpairs" 32 #define ETH_AF_PACKET_BLOCKSIZE_ARG "blocksz" 33 #define ETH_AF_PACKET_FRAMESIZE_ARG "framesz" 34 #define ETH_AF_PACKET_FRAMECOUNT_ARG "framecnt" 35 #define ETH_AF_PACKET_QDISC_BYPASS_ARG "qdisc_bypass" 36 37 #define DFLT_FRAME_SIZE (1 << 11) 38 #define DFLT_FRAME_COUNT (1 << 9) 39 40 #define RTE_PMD_AF_PACKET_MAX_RINGS 16 41 42 struct pkt_rx_queue { 43 int sockfd; 44 45 struct iovec *rd; 46 uint8_t *map; 47 unsigned int framecount; 48 unsigned int framenum; 49 50 struct rte_mempool *mb_pool; 51 uint16_t in_port; 52 53 volatile unsigned long rx_pkts; 54 volatile unsigned long rx_bytes; 55 }; 56 57 struct pkt_tx_queue { 58 int sockfd; 59 unsigned int frame_data_size; 60 61 struct iovec *rd; 62 uint8_t *map; 63 unsigned int framecount; 64 unsigned int framenum; 65 66 volatile unsigned long tx_pkts; 67 volatile unsigned long err_pkts; 68 volatile unsigned long tx_bytes; 69 }; 70 71 struct pmd_internals { 72 unsigned nb_queues; 73 74 int if_index; 75 char *if_name; 76 struct rte_ether_addr eth_addr; 77 78 struct tpacket_req req; 79 80 struct pkt_rx_queue rx_queue[RTE_PMD_AF_PACKET_MAX_RINGS]; 81 struct pkt_tx_queue tx_queue[RTE_PMD_AF_PACKET_MAX_RINGS]; 82 }; 83 84 static const char *valid_arguments[] = { 85 ETH_AF_PACKET_IFACE_ARG, 86 ETH_AF_PACKET_NUM_Q_ARG, 87 ETH_AF_PACKET_BLOCKSIZE_ARG, 88 ETH_AF_PACKET_FRAMESIZE_ARG, 89 ETH_AF_PACKET_FRAMECOUNT_ARG, 90 ETH_AF_PACKET_QDISC_BYPASS_ARG, 91 NULL 92 }; 93 94 static struct rte_eth_link pmd_link = { 95 .link_speed = ETH_SPEED_NUM_10G, 96 .link_duplex = ETH_LINK_FULL_DUPLEX, 97 .link_status = ETH_LINK_DOWN, 98 .link_autoneg = ETH_LINK_FIXED, 99 }; 100 101 static int af_packet_logtype; 102 103 #define PMD_LOG(level, fmt, args...) \ 104 rte_log(RTE_LOG_ ## level, af_packet_logtype, \ 105 "%s(): " fmt "\n", __func__, ##args) 106 107 #define PMD_LOG_ERRNO(level, fmt, args...) \ 108 rte_log(RTE_LOG_ ## level, af_packet_logtype, \ 109 "%s(): " fmt ":%s\n", __func__, ##args, strerror(errno)) 110 111 static uint16_t 112 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 113 { 114 unsigned i; 115 struct tpacket2_hdr *ppd; 116 struct rte_mbuf *mbuf; 117 uint8_t *pbuf; 118 struct pkt_rx_queue *pkt_q = queue; 119 uint16_t num_rx = 0; 120 unsigned long num_rx_bytes = 0; 121 unsigned int framecount, framenum; 122 123 if (unlikely(nb_pkts == 0)) 124 return 0; 125 126 /* 127 * Reads the given number of packets from the AF_PACKET socket one by 128 * one and copies the packet data into a newly allocated mbuf. 129 */ 130 framecount = pkt_q->framecount; 131 framenum = pkt_q->framenum; 132 for (i = 0; i < nb_pkts; i++) { 133 /* point at the next incoming frame */ 134 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base; 135 if ((ppd->tp_status & TP_STATUS_USER) == 0) 136 break; 137 138 /* allocate the next mbuf */ 139 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool); 140 if (unlikely(mbuf == NULL)) 141 break; 142 143 /* packet will fit in the mbuf, go ahead and receive it */ 144 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen; 145 pbuf = (uint8_t *) ppd + ppd->tp_mac; 146 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf)); 147 148 /* check for vlan info */ 149 if (ppd->tp_status & TP_STATUS_VLAN_VALID) { 150 mbuf->vlan_tci = ppd->tp_vlan_tci; 151 mbuf->ol_flags |= (PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED); 152 } 153 154 /* release incoming frame and advance ring buffer */ 155 ppd->tp_status = TP_STATUS_KERNEL; 156 if (++framenum >= framecount) 157 framenum = 0; 158 mbuf->port = pkt_q->in_port; 159 160 /* account for the receive frame */ 161 bufs[i] = mbuf; 162 num_rx++; 163 num_rx_bytes += mbuf->pkt_len; 164 } 165 pkt_q->framenum = framenum; 166 pkt_q->rx_pkts += num_rx; 167 pkt_q->rx_bytes += num_rx_bytes; 168 return num_rx; 169 } 170 171 /* 172 * Callback to handle sending packets through a real NIC. 173 */ 174 static uint16_t 175 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 176 { 177 struct tpacket2_hdr *ppd; 178 struct rte_mbuf *mbuf; 179 uint8_t *pbuf; 180 unsigned int framecount, framenum; 181 struct pollfd pfd; 182 struct pkt_tx_queue *pkt_q = queue; 183 uint16_t num_tx = 0; 184 unsigned long num_tx_bytes = 0; 185 int i; 186 187 if (unlikely(nb_pkts == 0)) 188 return 0; 189 190 memset(&pfd, 0, sizeof(pfd)); 191 pfd.fd = pkt_q->sockfd; 192 pfd.events = POLLOUT; 193 pfd.revents = 0; 194 195 framecount = pkt_q->framecount; 196 framenum = pkt_q->framenum; 197 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base; 198 for (i = 0; i < nb_pkts; i++) { 199 mbuf = *bufs++; 200 201 /* drop oversized packets */ 202 if (mbuf->pkt_len > pkt_q->frame_data_size) { 203 rte_pktmbuf_free(mbuf); 204 continue; 205 } 206 207 /* insert vlan info if necessary */ 208 if (mbuf->ol_flags & PKT_TX_VLAN_PKT) { 209 if (rte_vlan_insert(&mbuf)) { 210 rte_pktmbuf_free(mbuf); 211 continue; 212 } 213 } 214 215 /* point at the next incoming frame */ 216 if ((ppd->tp_status != TP_STATUS_AVAILABLE) && 217 (poll(&pfd, 1, -1) < 0)) 218 break; 219 220 /* copy the tx frame data */ 221 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN - 222 sizeof(struct sockaddr_ll); 223 224 struct rte_mbuf *tmp_mbuf = mbuf; 225 while (tmp_mbuf) { 226 uint16_t data_len = rte_pktmbuf_data_len(tmp_mbuf); 227 memcpy(pbuf, rte_pktmbuf_mtod(tmp_mbuf, void*), data_len); 228 pbuf += data_len; 229 tmp_mbuf = tmp_mbuf->next; 230 } 231 232 ppd->tp_len = mbuf->pkt_len; 233 ppd->tp_snaplen = mbuf->pkt_len; 234 235 /* release incoming frame and advance ring buffer */ 236 ppd->tp_status = TP_STATUS_SEND_REQUEST; 237 if (++framenum >= framecount) 238 framenum = 0; 239 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base; 240 241 num_tx++; 242 num_tx_bytes += mbuf->pkt_len; 243 rte_pktmbuf_free(mbuf); 244 } 245 246 /* kick-off transmits */ 247 if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1) { 248 /* error sending -- no packets transmitted */ 249 num_tx = 0; 250 num_tx_bytes = 0; 251 } 252 253 pkt_q->framenum = framenum; 254 pkt_q->tx_pkts += num_tx; 255 pkt_q->err_pkts += i - num_tx; 256 pkt_q->tx_bytes += num_tx_bytes; 257 return i; 258 } 259 260 static int 261 eth_dev_start(struct rte_eth_dev *dev) 262 { 263 dev->data->dev_link.link_status = ETH_LINK_UP; 264 return 0; 265 } 266 267 /* 268 * This function gets called when the current port gets stopped. 269 */ 270 static void 271 eth_dev_stop(struct rte_eth_dev *dev) 272 { 273 unsigned i; 274 int sockfd; 275 struct pmd_internals *internals = dev->data->dev_private; 276 277 for (i = 0; i < internals->nb_queues; i++) { 278 sockfd = internals->rx_queue[i].sockfd; 279 if (sockfd != -1) 280 close(sockfd); 281 282 /* Prevent use after free in case tx fd == rx fd */ 283 if (sockfd != internals->tx_queue[i].sockfd) { 284 sockfd = internals->tx_queue[i].sockfd; 285 if (sockfd != -1) 286 close(sockfd); 287 } 288 289 internals->rx_queue[i].sockfd = -1; 290 internals->tx_queue[i].sockfd = -1; 291 } 292 293 dev->data->dev_link.link_status = ETH_LINK_DOWN; 294 } 295 296 static int 297 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) 298 { 299 return 0; 300 } 301 302 static int 303 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) 304 { 305 struct pmd_internals *internals = dev->data->dev_private; 306 307 dev_info->if_index = internals->if_index; 308 dev_info->max_mac_addrs = 1; 309 dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN; 310 dev_info->max_rx_queues = (uint16_t)internals->nb_queues; 311 dev_info->max_tx_queues = (uint16_t)internals->nb_queues; 312 dev_info->min_rx_bufsize = 0; 313 314 return 0; 315 } 316 317 static int 318 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats) 319 { 320 unsigned i, imax; 321 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0; 322 unsigned long rx_bytes_total = 0, tx_bytes_total = 0; 323 const struct pmd_internals *internal = dev->data->dev_private; 324 325 imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ? 326 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS); 327 for (i = 0; i < imax; i++) { 328 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts; 329 igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes; 330 rx_total += igb_stats->q_ipackets[i]; 331 rx_bytes_total += igb_stats->q_ibytes[i]; 332 } 333 334 imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ? 335 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS); 336 for (i = 0; i < imax; i++) { 337 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts; 338 igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes; 339 tx_total += igb_stats->q_opackets[i]; 340 tx_err_total += internal->tx_queue[i].err_pkts; 341 tx_bytes_total += igb_stats->q_obytes[i]; 342 } 343 344 igb_stats->ipackets = rx_total; 345 igb_stats->ibytes = rx_bytes_total; 346 igb_stats->opackets = tx_total; 347 igb_stats->oerrors = tx_err_total; 348 igb_stats->obytes = tx_bytes_total; 349 return 0; 350 } 351 352 static int 353 eth_stats_reset(struct rte_eth_dev *dev) 354 { 355 unsigned i; 356 struct pmd_internals *internal = dev->data->dev_private; 357 358 for (i = 0; i < internal->nb_queues; i++) { 359 internal->rx_queue[i].rx_pkts = 0; 360 internal->rx_queue[i].rx_bytes = 0; 361 } 362 363 for (i = 0; i < internal->nb_queues; i++) { 364 internal->tx_queue[i].tx_pkts = 0; 365 internal->tx_queue[i].err_pkts = 0; 366 internal->tx_queue[i].tx_bytes = 0; 367 } 368 369 return 0; 370 } 371 372 static void 373 eth_dev_close(struct rte_eth_dev *dev __rte_unused) 374 { 375 } 376 377 static void 378 eth_queue_release(void *q __rte_unused) 379 { 380 } 381 382 static int 383 eth_link_update(struct rte_eth_dev *dev __rte_unused, 384 int wait_to_complete __rte_unused) 385 { 386 return 0; 387 } 388 389 static int 390 eth_rx_queue_setup(struct rte_eth_dev *dev, 391 uint16_t rx_queue_id, 392 uint16_t nb_rx_desc __rte_unused, 393 unsigned int socket_id __rte_unused, 394 const struct rte_eth_rxconf *rx_conf __rte_unused, 395 struct rte_mempool *mb_pool) 396 { 397 struct pmd_internals *internals = dev->data->dev_private; 398 struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id]; 399 unsigned int buf_size, data_size; 400 401 pkt_q->mb_pool = mb_pool; 402 403 /* Now get the space available for data in the mbuf */ 404 buf_size = rte_pktmbuf_data_room_size(pkt_q->mb_pool) - 405 RTE_PKTMBUF_HEADROOM; 406 data_size = internals->req.tp_frame_size; 407 data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll); 408 409 if (data_size > buf_size) { 410 PMD_LOG(ERR, 411 "%s: %d bytes will not fit in mbuf (%d bytes)", 412 dev->device->name, data_size, buf_size); 413 return -ENOMEM; 414 } 415 416 dev->data->rx_queues[rx_queue_id] = pkt_q; 417 pkt_q->in_port = dev->data->port_id; 418 419 return 0; 420 } 421 422 static int 423 eth_tx_queue_setup(struct rte_eth_dev *dev, 424 uint16_t tx_queue_id, 425 uint16_t nb_tx_desc __rte_unused, 426 unsigned int socket_id __rte_unused, 427 const struct rte_eth_txconf *tx_conf __rte_unused) 428 { 429 430 struct pmd_internals *internals = dev->data->dev_private; 431 432 dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id]; 433 return 0; 434 } 435 436 static int 437 eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) 438 { 439 struct pmd_internals *internals = dev->data->dev_private; 440 struct ifreq ifr = { .ifr_mtu = mtu }; 441 int ret; 442 int s; 443 unsigned int data_size = internals->req.tp_frame_size - 444 TPACKET2_HDRLEN; 445 446 if (mtu > data_size) 447 return -EINVAL; 448 449 s = socket(PF_INET, SOCK_DGRAM, 0); 450 if (s < 0) 451 return -EINVAL; 452 453 strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ); 454 ret = ioctl(s, SIOCSIFMTU, &ifr); 455 close(s); 456 457 if (ret < 0) 458 return -EINVAL; 459 460 return 0; 461 } 462 463 static int 464 eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask) 465 { 466 struct ifreq ifr; 467 int ret = 0; 468 int s; 469 470 s = socket(PF_INET, SOCK_DGRAM, 0); 471 if (s < 0) 472 return -errno; 473 474 strlcpy(ifr.ifr_name, if_name, IFNAMSIZ); 475 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { 476 ret = -errno; 477 goto out; 478 } 479 ifr.ifr_flags &= mask; 480 ifr.ifr_flags |= flags; 481 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) { 482 ret = -errno; 483 goto out; 484 } 485 out: 486 close(s); 487 return ret; 488 } 489 490 static int 491 eth_dev_promiscuous_enable(struct rte_eth_dev *dev) 492 { 493 struct pmd_internals *internals = dev->data->dev_private; 494 495 return eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0); 496 } 497 498 static int 499 eth_dev_promiscuous_disable(struct rte_eth_dev *dev) 500 { 501 struct pmd_internals *internals = dev->data->dev_private; 502 503 return eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC); 504 } 505 506 static const struct eth_dev_ops ops = { 507 .dev_start = eth_dev_start, 508 .dev_stop = eth_dev_stop, 509 .dev_close = eth_dev_close, 510 .dev_configure = eth_dev_configure, 511 .dev_infos_get = eth_dev_info, 512 .mtu_set = eth_dev_mtu_set, 513 .promiscuous_enable = eth_dev_promiscuous_enable, 514 .promiscuous_disable = eth_dev_promiscuous_disable, 515 .rx_queue_setup = eth_rx_queue_setup, 516 .tx_queue_setup = eth_tx_queue_setup, 517 .rx_queue_release = eth_queue_release, 518 .tx_queue_release = eth_queue_release, 519 .link_update = eth_link_update, 520 .stats_get = eth_stats_get, 521 .stats_reset = eth_stats_reset, 522 }; 523 524 /* 525 * Opens an AF_PACKET socket 526 */ 527 static int 528 open_packet_iface(const char *key __rte_unused, 529 const char *value __rte_unused, 530 void *extra_args) 531 { 532 int *sockfd = extra_args; 533 534 /* Open an AF_PACKET socket... */ 535 *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); 536 if (*sockfd == -1) { 537 PMD_LOG(ERR, "Could not open AF_PACKET socket"); 538 return -1; 539 } 540 541 return 0; 542 } 543 544 static int 545 rte_pmd_init_internals(struct rte_vdev_device *dev, 546 const int sockfd, 547 const unsigned nb_queues, 548 unsigned int blocksize, 549 unsigned int blockcnt, 550 unsigned int framesize, 551 unsigned int framecnt, 552 unsigned int qdisc_bypass, 553 struct pmd_internals **internals, 554 struct rte_eth_dev **eth_dev, 555 struct rte_kvargs *kvlist) 556 { 557 const char *name = rte_vdev_device_name(dev); 558 const unsigned int numa_node = dev->device.numa_node; 559 struct rte_eth_dev_data *data = NULL; 560 struct rte_kvargs_pair *pair = NULL; 561 struct ifreq ifr; 562 size_t ifnamelen; 563 unsigned k_idx; 564 struct sockaddr_ll sockaddr; 565 struct tpacket_req *req; 566 struct pkt_rx_queue *rx_queue; 567 struct pkt_tx_queue *tx_queue; 568 int rc, tpver, discard; 569 int qsockfd = -1; 570 unsigned int i, q, rdsize; 571 #if defined(PACKET_FANOUT) 572 int fanout_arg; 573 #endif 574 575 for (k_idx = 0; k_idx < kvlist->count; k_idx++) { 576 pair = &kvlist->pairs[k_idx]; 577 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL) 578 break; 579 } 580 if (pair == NULL) { 581 PMD_LOG(ERR, 582 "%s: no interface specified for AF_PACKET ethdev", 583 name); 584 return -1; 585 } 586 587 PMD_LOG(INFO, 588 "%s: creating AF_PACKET-backed ethdev on numa socket %u", 589 name, numa_node); 590 591 *internals = rte_zmalloc_socket(name, sizeof(**internals), 592 0, numa_node); 593 if (*internals == NULL) 594 return -1; 595 596 for (q = 0; q < nb_queues; q++) { 597 (*internals)->rx_queue[q].map = MAP_FAILED; 598 (*internals)->tx_queue[q].map = MAP_FAILED; 599 } 600 601 req = &((*internals)->req); 602 603 req->tp_block_size = blocksize; 604 req->tp_block_nr = blockcnt; 605 req->tp_frame_size = framesize; 606 req->tp_frame_nr = framecnt; 607 608 ifnamelen = strlen(pair->value); 609 if (ifnamelen < sizeof(ifr.ifr_name)) { 610 memcpy(ifr.ifr_name, pair->value, ifnamelen); 611 ifr.ifr_name[ifnamelen] = '\0'; 612 } else { 613 PMD_LOG(ERR, 614 "%s: I/F name too long (%s)", 615 name, pair->value); 616 return -1; 617 } 618 if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) { 619 PMD_LOG_ERRNO(ERR, "%s: ioctl failed (SIOCGIFINDEX)", name); 620 return -1; 621 } 622 (*internals)->if_name = strdup(pair->value); 623 if ((*internals)->if_name == NULL) 624 return -1; 625 (*internals)->if_index = ifr.ifr_ifindex; 626 627 if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) { 628 PMD_LOG_ERRNO(ERR, "%s: ioctl failed (SIOCGIFHWADDR)", name); 629 return -1; 630 } 631 memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN); 632 633 memset(&sockaddr, 0, sizeof(sockaddr)); 634 sockaddr.sll_family = AF_PACKET; 635 sockaddr.sll_protocol = htons(ETH_P_ALL); 636 sockaddr.sll_ifindex = (*internals)->if_index; 637 638 #if defined(PACKET_FANOUT) 639 fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff; 640 fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16; 641 #if defined(PACKET_FANOUT_FLAG_ROLLOVER) 642 fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16; 643 #endif 644 #endif 645 646 for (q = 0; q < nb_queues; q++) { 647 /* Open an AF_PACKET socket for this queue... */ 648 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); 649 if (qsockfd == -1) { 650 PMD_LOG_ERRNO(ERR, 651 "%s: could not open AF_PACKET socket", 652 name); 653 return -1; 654 } 655 656 tpver = TPACKET_V2; 657 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION, 658 &tpver, sizeof(tpver)); 659 if (rc == -1) { 660 PMD_LOG_ERRNO(ERR, 661 "%s: could not set PACKET_VERSION on AF_PACKET socket for %s", 662 name, pair->value); 663 goto error; 664 } 665 666 discard = 1; 667 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS, 668 &discard, sizeof(discard)); 669 if (rc == -1) { 670 PMD_LOG_ERRNO(ERR, 671 "%s: could not set PACKET_LOSS on AF_PACKET socket for %s", 672 name, pair->value); 673 goto error; 674 } 675 676 #if defined(PACKET_QDISC_BYPASS) 677 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS, 678 &qdisc_bypass, sizeof(qdisc_bypass)); 679 if (rc == -1) { 680 PMD_LOG_ERRNO(ERR, 681 "%s: could not set PACKET_QDISC_BYPASS on AF_PACKET socket for %s", 682 name, pair->value); 683 goto error; 684 } 685 #else 686 RTE_SET_USED(qdisc_bypass); 687 #endif 688 689 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req)); 690 if (rc == -1) { 691 PMD_LOG_ERRNO(ERR, 692 "%s: could not set PACKET_RX_RING on AF_PACKET socket for %s", 693 name, pair->value); 694 goto error; 695 } 696 697 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req)); 698 if (rc == -1) { 699 PMD_LOG_ERRNO(ERR, 700 "%s: could not set PACKET_TX_RING on AF_PACKET " 701 "socket for %s", name, pair->value); 702 goto error; 703 } 704 705 rx_queue = &((*internals)->rx_queue[q]); 706 rx_queue->framecount = req->tp_frame_nr; 707 708 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr, 709 PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED, 710 qsockfd, 0); 711 if (rx_queue->map == MAP_FAILED) { 712 PMD_LOG_ERRNO(ERR, 713 "%s: call to mmap failed on AF_PACKET socket for %s", 714 name, pair->value); 715 goto error; 716 } 717 718 /* rdsize is same for both Tx and Rx */ 719 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd)); 720 721 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node); 722 if (rx_queue->rd == NULL) 723 goto error; 724 for (i = 0; i < req->tp_frame_nr; ++i) { 725 rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize); 726 rx_queue->rd[i].iov_len = req->tp_frame_size; 727 } 728 rx_queue->sockfd = qsockfd; 729 730 tx_queue = &((*internals)->tx_queue[q]); 731 tx_queue->framecount = req->tp_frame_nr; 732 tx_queue->frame_data_size = req->tp_frame_size; 733 tx_queue->frame_data_size -= TPACKET2_HDRLEN - 734 sizeof(struct sockaddr_ll); 735 736 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr; 737 738 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node); 739 if (tx_queue->rd == NULL) 740 goto error; 741 for (i = 0; i < req->tp_frame_nr; ++i) { 742 tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize); 743 tx_queue->rd[i].iov_len = req->tp_frame_size; 744 } 745 tx_queue->sockfd = qsockfd; 746 747 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr)); 748 if (rc == -1) { 749 PMD_LOG_ERRNO(ERR, 750 "%s: could not bind AF_PACKET socket to %s", 751 name, pair->value); 752 goto error; 753 } 754 755 #if defined(PACKET_FANOUT) 756 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT, 757 &fanout_arg, sizeof(fanout_arg)); 758 if (rc == -1) { 759 PMD_LOG_ERRNO(ERR, 760 "%s: could not set PACKET_FANOUT on AF_PACKET socket for %s", 761 name, pair->value); 762 goto error; 763 } 764 #endif 765 } 766 767 /* reserve an ethdev entry */ 768 *eth_dev = rte_eth_vdev_allocate(dev, 0); 769 if (*eth_dev == NULL) 770 goto error; 771 772 /* 773 * now put it all together 774 * - store queue data in internals, 775 * - store numa_node in eth_dev 776 * - point eth_dev_data to internals 777 * - and point eth_dev structure to new eth_dev_data structure 778 */ 779 780 (*internals)->nb_queues = nb_queues; 781 782 data = (*eth_dev)->data; 783 data->dev_private = *internals; 784 data->nb_rx_queues = (uint16_t)nb_queues; 785 data->nb_tx_queues = (uint16_t)nb_queues; 786 data->dev_link = pmd_link; 787 data->mac_addrs = &(*internals)->eth_addr; 788 789 (*eth_dev)->dev_ops = &ops; 790 791 return 0; 792 793 error: 794 if (qsockfd != -1) 795 close(qsockfd); 796 for (q = 0; q < nb_queues; q++) { 797 munmap((*internals)->rx_queue[q].map, 798 2 * req->tp_block_size * req->tp_block_nr); 799 800 rte_free((*internals)->rx_queue[q].rd); 801 rte_free((*internals)->tx_queue[q].rd); 802 if (((*internals)->rx_queue[q].sockfd != 0) && 803 ((*internals)->rx_queue[q].sockfd != qsockfd)) 804 close((*internals)->rx_queue[q].sockfd); 805 } 806 free((*internals)->if_name); 807 rte_free(*internals); 808 return -1; 809 } 810 811 static int 812 rte_eth_from_packet(struct rte_vdev_device *dev, 813 int const *sockfd, 814 struct rte_kvargs *kvlist) 815 { 816 const char *name = rte_vdev_device_name(dev); 817 struct pmd_internals *internals = NULL; 818 struct rte_eth_dev *eth_dev = NULL; 819 struct rte_kvargs_pair *pair = NULL; 820 unsigned k_idx; 821 unsigned int blockcount; 822 unsigned int blocksize; 823 unsigned int framesize = DFLT_FRAME_SIZE; 824 unsigned int framecount = DFLT_FRAME_COUNT; 825 unsigned int qpairs = 1; 826 unsigned int qdisc_bypass = 1; 827 828 /* do some parameter checking */ 829 if (*sockfd < 0) 830 return -1; 831 832 blocksize = getpagesize(); 833 834 /* 835 * Walk arguments for configurable settings 836 */ 837 for (k_idx = 0; k_idx < kvlist->count; k_idx++) { 838 pair = &kvlist->pairs[k_idx]; 839 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) { 840 qpairs = atoi(pair->value); 841 if (qpairs < 1 || 842 qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) { 843 PMD_LOG(ERR, 844 "%s: invalid qpairs value", 845 name); 846 return -1; 847 } 848 continue; 849 } 850 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) { 851 blocksize = atoi(pair->value); 852 if (!blocksize) { 853 PMD_LOG(ERR, 854 "%s: invalid blocksize value", 855 name); 856 return -1; 857 } 858 continue; 859 } 860 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) { 861 framesize = atoi(pair->value); 862 if (!framesize) { 863 PMD_LOG(ERR, 864 "%s: invalid framesize value", 865 name); 866 return -1; 867 } 868 continue; 869 } 870 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) { 871 framecount = atoi(pair->value); 872 if (!framecount) { 873 PMD_LOG(ERR, 874 "%s: invalid framecount value", 875 name); 876 return -1; 877 } 878 continue; 879 } 880 if (strstr(pair->key, ETH_AF_PACKET_QDISC_BYPASS_ARG) != NULL) { 881 qdisc_bypass = atoi(pair->value); 882 if (qdisc_bypass > 1) { 883 PMD_LOG(ERR, 884 "%s: invalid bypass value", 885 name); 886 return -1; 887 } 888 continue; 889 } 890 } 891 892 if (framesize > blocksize) { 893 PMD_LOG(ERR, 894 "%s: AF_PACKET MMAP frame size exceeds block size!", 895 name); 896 return -1; 897 } 898 899 blockcount = framecount / (blocksize / framesize); 900 if (!blockcount) { 901 PMD_LOG(ERR, 902 "%s: invalid AF_PACKET MMAP parameters", name); 903 return -1; 904 } 905 906 PMD_LOG(INFO, "%s: AF_PACKET MMAP parameters:", name); 907 PMD_LOG(INFO, "%s:\tblock size %d", name, blocksize); 908 PMD_LOG(INFO, "%s:\tblock count %d", name, blockcount); 909 PMD_LOG(INFO, "%s:\tframe size %d", name, framesize); 910 PMD_LOG(INFO, "%s:\tframe count %d", name, framecount); 911 912 if (rte_pmd_init_internals(dev, *sockfd, qpairs, 913 blocksize, blockcount, 914 framesize, framecount, 915 qdisc_bypass, 916 &internals, ð_dev, 917 kvlist) < 0) 918 return -1; 919 920 eth_dev->rx_pkt_burst = eth_af_packet_rx; 921 eth_dev->tx_pkt_burst = eth_af_packet_tx; 922 923 rte_eth_dev_probing_finish(eth_dev); 924 return 0; 925 } 926 927 static int 928 rte_pmd_af_packet_probe(struct rte_vdev_device *dev) 929 { 930 int ret = 0; 931 struct rte_kvargs *kvlist; 932 int sockfd = -1; 933 struct rte_eth_dev *eth_dev; 934 const char *name = rte_vdev_device_name(dev); 935 936 PMD_LOG(INFO, "Initializing pmd_af_packet for %s", name); 937 938 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 939 eth_dev = rte_eth_dev_attach_secondary(name); 940 if (!eth_dev) { 941 PMD_LOG(ERR, "Failed to probe %s", name); 942 return -1; 943 } 944 /* TODO: request info from primary to set up Rx and Tx */ 945 eth_dev->dev_ops = &ops; 946 eth_dev->device = &dev->device; 947 rte_eth_dev_probing_finish(eth_dev); 948 return 0; 949 } 950 951 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments); 952 if (kvlist == NULL) { 953 ret = -1; 954 goto exit; 955 } 956 957 /* 958 * If iface argument is passed we open the NICs and use them for 959 * reading / writing 960 */ 961 if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) { 962 963 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG, 964 &open_packet_iface, &sockfd); 965 if (ret < 0) 966 goto exit; 967 } 968 969 if (dev->device.numa_node == SOCKET_ID_ANY) 970 dev->device.numa_node = rte_socket_id(); 971 972 ret = rte_eth_from_packet(dev, &sockfd, kvlist); 973 close(sockfd); /* no longer needed */ 974 975 exit: 976 rte_kvargs_free(kvlist); 977 return ret; 978 } 979 980 static int 981 rte_pmd_af_packet_remove(struct rte_vdev_device *dev) 982 { 983 struct rte_eth_dev *eth_dev = NULL; 984 struct pmd_internals *internals; 985 struct tpacket_req *req; 986 unsigned q; 987 988 PMD_LOG(INFO, "Closing AF_PACKET ethdev on numa socket %u", 989 rte_socket_id()); 990 991 if (dev == NULL) 992 return -1; 993 994 /* find the ethdev entry */ 995 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev)); 996 if (eth_dev == NULL) 997 return -1; 998 999 /* mac_addrs must not be freed alone because part of dev_private */ 1000 eth_dev->data->mac_addrs = NULL; 1001 1002 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 1003 return rte_eth_dev_release_port(eth_dev); 1004 1005 internals = eth_dev->data->dev_private; 1006 req = &internals->req; 1007 for (q = 0; q < internals->nb_queues; q++) { 1008 munmap(internals->rx_queue[q].map, 1009 2 * req->tp_block_size * req->tp_block_nr); 1010 rte_free(internals->rx_queue[q].rd); 1011 rte_free(internals->tx_queue[q].rd); 1012 } 1013 free(internals->if_name); 1014 1015 rte_eth_dev_release_port(eth_dev); 1016 1017 return 0; 1018 } 1019 1020 static struct rte_vdev_driver pmd_af_packet_drv = { 1021 .probe = rte_pmd_af_packet_probe, 1022 .remove = rte_pmd_af_packet_remove, 1023 }; 1024 1025 RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv); 1026 RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet); 1027 RTE_PMD_REGISTER_PARAM_STRING(net_af_packet, 1028 "iface=<string> " 1029 "qpairs=<int> " 1030 "blocksz=<int> " 1031 "framesz=<int> " 1032 "framecnt=<int> " 1033 "qdisc_bypass=<0|1>"); 1034 1035 RTE_INIT(af_packet_init_log) 1036 { 1037 af_packet_logtype = rte_log_register("pmd.net.packet"); 1038 if (af_packet_logtype >= 0) 1039 rte_log_set_level(af_packet_logtype, RTE_LOG_NOTICE); 1040 } 1041