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