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