drivers/net/af_packet/rte_eth_af_packet.c

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