lib/librte_pmd_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) 2010-2014 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_dev.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 #include "rte_eth_af_packet.h"
  57
  58 #define ETH_AF_PACKET_IFACE_ARG         "iface"
  59 #define ETH_AF_PACKET_NUM_Q_ARG         "qpairs"
  60 #define ETH_AF_PACKET_BLOCKSIZE_ARG     "blocksz"
  61 #define ETH_AF_PACKET_FRAMESIZE_ARG     "framesz"
  62 #define ETH_AF_PACKET_FRAMECOUNT_ARG    "framecnt"
  63
  64 #define DFLT_BLOCK_SIZE         (1 << 12)
  65 #define DFLT_FRAME_SIZE         (1 << 11)
  66 #define DFLT_FRAME_COUNT        (1 << 9)
  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
  78         volatile unsigned long rx_pkts;
  79         volatile unsigned long err_pkts;
  80 };
  81
  82 struct pkt_tx_queue {
  83         int sockfd;
  84
  85         struct iovec *rd;
  86         uint8_t *map;
  87         unsigned int framecount;
  88         unsigned int framenum;
  89
  90         volatile unsigned long tx_pkts;
  91         volatile unsigned long err_pkts;
  92 };
  93
  94 struct pmd_internals {
  95         unsigned nb_queues;
  96
  97         int if_index;
  98         struct ether_addr eth_addr;
  99
 100         struct tpacket_req req;
 101
 102         struct pkt_rx_queue rx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
 103         struct pkt_tx_queue tx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
 104 };
 105
 106 static const char *valid_arguments[] = {
 107         ETH_AF_PACKET_IFACE_ARG,
 108         ETH_AF_PACKET_NUM_Q_ARG,
 109         ETH_AF_PACKET_BLOCKSIZE_ARG,
 110         ETH_AF_PACKET_FRAMESIZE_ARG,
 111         ETH_AF_PACKET_FRAMECOUNT_ARG,
 112         NULL
 113 };
 114
 115 static const char *drivername = "AF_PACKET PMD";
 116
 117 static struct rte_eth_link pmd_link = {
 118         .link_speed = 10000,
 119         .link_duplex = ETH_LINK_FULL_DUPLEX,
 120         .link_status = 0
 121 };
 122
 123 static uint16_t
 124 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 125 {
 126         unsigned i;
 127         struct tpacket2_hdr *ppd;
 128         struct rte_mbuf *mbuf;
 129         uint8_t *pbuf;
 130         struct pkt_rx_queue *pkt_q = queue;
 131         uint16_t num_rx = 0;
 132         unsigned int framecount, framenum;
 133
 134         if (unlikely(nb_pkts == 0))
 135                 return 0;
 136
 137         /*
 138          * Reads the given number of packets from the AF_PACKET socket one by
 139          * one and copies the packet data into a newly allocated mbuf.
 140          */
 141         framecount = pkt_q->framecount;
 142         framenum = pkt_q->framenum;
 143         for (i = 0; i < nb_pkts; i++) {
 144                 /* point at the next incoming frame */
 145                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 146                 if ((ppd->tp_status & TP_STATUS_USER) == 0)
 147                         break;
 148
 149                 /* allocate the next mbuf */
 150                 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
 151                 if (unlikely(mbuf == NULL))
 152                         break;
 153
 154                 /* packet will fit in the mbuf, go ahead and receive it */
 155                 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
 156                 pbuf = (uint8_t *) ppd + ppd->tp_mac;
 157                 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
 158
 159                 /* release incoming frame and advance ring buffer */
 160                 ppd->tp_status = TP_STATUS_KERNEL;
 161                 if (++framenum >= framecount)
 162                         framenum = 0;
 163
 164                 /* account for the receive frame */
 165                 bufs[i] = mbuf;
 166                 num_rx++;
 167         }
 168         pkt_q->framenum = framenum;
 169         pkt_q->rx_pkts += num_rx;
 170         return num_rx;
 171 }
 172
 173 /*
 174  * Callback to handle sending packets through a real NIC.
 175  */
 176 static uint16_t
 177 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 178 {
 179         struct tpacket2_hdr *ppd;
 180         struct rte_mbuf *mbuf;
 181         uint8_t *pbuf;
 182         unsigned int framecount, framenum;
 183         struct pollfd pfd;
 184         struct pkt_tx_queue *pkt_q = queue;
 185         uint16_t num_tx = 0;
 186         int i;
 187
 188         if (unlikely(nb_pkts == 0))
 189                 return 0;
 190
 191         memset(&pfd, 0, sizeof(pfd));
 192         pfd.fd = pkt_q->sockfd;
 193         pfd.events = POLLOUT;
 194         pfd.revents = 0;
 195
 196         framecount = pkt_q->framecount;
 197         framenum = pkt_q->framenum;
 198         ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 199         for (i = 0; i < nb_pkts; i++) {
 200                 /* point at the next incoming frame */
 201                 if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
 202                     (poll(&pfd, 1, -1) < 0))
 203                                 continue;
 204
 205                 /* copy the tx frame data */
 206                 mbuf = bufs[num_tx];
 207                 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
 208                         sizeof(struct sockaddr_ll);
 209                 memcpy(pbuf, rte_pktmbuf_mtod(mbuf, void*), rte_pktmbuf_data_len(mbuf));
 210                 ppd->tp_len = ppd->tp_snaplen = rte_pktmbuf_data_len(mbuf);
 211
 212                 /* release incoming frame and advance ring buffer */
 213                 ppd->tp_status = TP_STATUS_SEND_REQUEST;
 214                 if (++framenum >= framecount)
 215                         framenum = 0;
 216                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 217
 218                 num_tx++;
 219                 rte_pktmbuf_free(mbuf);
 220         }
 221
 222         /* kick-off transmits */
 223         sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
 224
 225         pkt_q->framenum = framenum;
 226         pkt_q->tx_pkts += num_tx;
 227         pkt_q->err_pkts += nb_pkts - num_tx;
 228         return num_tx;
 229 }
 230
 231 static int
 232 eth_dev_start(struct rte_eth_dev *dev)
 233 {
 234         dev->data->dev_link.link_status = 1;
 235         return 0;
 236 }
 237
 238 /*
 239  * This function gets called when the current port gets stopped.
 240  */
 241 static void
 242 eth_dev_stop(struct rte_eth_dev *dev)
 243 {
 244         unsigned i;
 245         int sockfd;
 246         struct pmd_internals *internals = dev->data->dev_private;
 247
 248         for (i = 0; i < internals->nb_queues; i++) {
 249                 sockfd = internals->rx_queue[i].sockfd;
 250                 if (sockfd != -1)
 251                         close(sockfd);
 252                 sockfd = internals->tx_queue[i].sockfd;
 253                 if (sockfd != -1)
 254                         close(sockfd);
 255         }
 256
 257         dev->data->dev_link.link_status = 0;
 258 }
 259
 260 static int
 261 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 262 {
 263         return 0;
 264 }
 265
 266 static void
 267 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 268 {
 269         struct pmd_internals *internals = dev->data->dev_private;
 270
 271         dev_info->driver_name = drivername;
 272         dev_info->if_index = internals->if_index;
 273         dev_info->max_mac_addrs = 1;
 274         dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
 275         dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
 276         dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
 277         dev_info->min_rx_bufsize = 0;
 278         dev_info->pci_dev = NULL;
 279 }
 280
 281 static void
 282 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 283 {
 284         unsigned i, imax;
 285         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 286         const struct pmd_internals *internal = dev->data->dev_private;
 287
 288         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 289                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 290         for (i = 0; i < imax; i++) {
 291                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 292                 rx_total += igb_stats->q_ipackets[i];
 293         }
 294
 295         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 296                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 297         for (i = 0; i < imax; i++) {
 298                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 299                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 300                 tx_total += igb_stats->q_opackets[i];
 301                 tx_err_total += igb_stats->q_errors[i];
 302         }
 303
 304         igb_stats->ipackets = rx_total;
 305         igb_stats->opackets = tx_total;
 306         igb_stats->oerrors = tx_err_total;
 307 }
 308
 309 static void
 310 eth_stats_reset(struct rte_eth_dev *dev)
 311 {
 312         unsigned i;
 313         struct pmd_internals *internal = dev->data->dev_private;
 314
 315         for (i = 0; i < internal->nb_queues; i++)
 316                 internal->rx_queue[i].rx_pkts = 0;
 317
 318         for (i = 0; i < internal->nb_queues; i++) {
 319                 internal->tx_queue[i].tx_pkts = 0;
 320                 internal->tx_queue[i].err_pkts = 0;
 321         }
 322 }
 323
 324 static void
 325 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 326 {
 327 }
 328
 329 static void
 330 eth_queue_release(void *q __rte_unused)
 331 {
 332 }
 333
 334 static int
 335 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 336                 int wait_to_complete __rte_unused)
 337 {
 338         return 0;
 339 }
 340
 341 static int
 342 eth_rx_queue_setup(struct rte_eth_dev *dev,
 343                    uint16_t rx_queue_id,
 344                    uint16_t nb_rx_desc __rte_unused,
 345                    unsigned int socket_id __rte_unused,
 346                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 347                    struct rte_mempool *mb_pool)
 348 {
 349         struct pmd_internals *internals = dev->data->dev_private;
 350         struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
 351         struct rte_pktmbuf_pool_private *mbp_priv;
 352         uint16_t buf_size;
 353
 354         pkt_q->mb_pool = mb_pool;
 355
 356         /* Now get the space available for data in the mbuf */
 357         mbp_priv = rte_mempool_get_priv(pkt_q->mb_pool);
 358         buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
 359                                RTE_PKTMBUF_HEADROOM);
 360
 361         if (ETH_FRAME_LEN > buf_size) {
 362                 RTE_LOG(ERR, PMD,
 363                         "%s: %d bytes will not fit in mbuf (%d bytes)\n",
 364                         dev->data->name, ETH_FRAME_LEN, buf_size);
 365                 return -ENOMEM;
 366         }
 367
 368         dev->data->rx_queues[rx_queue_id] = pkt_q;
 369
 370         return 0;
 371 }
 372
 373 static int
 374 eth_tx_queue_setup(struct rte_eth_dev *dev,
 375                    uint16_t tx_queue_id,
 376                    uint16_t nb_tx_desc __rte_unused,
 377                    unsigned int socket_id __rte_unused,
 378                    const struct rte_eth_txconf *tx_conf __rte_unused)
 379 {
 380
 381         struct pmd_internals *internals = dev->data->dev_private;
 382
 383         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 384         return 0;
 385 }
 386
 387 static struct eth_dev_ops ops = {
 388         .dev_start = eth_dev_start,
 389         .dev_stop = eth_dev_stop,
 390         .dev_close = eth_dev_close,
 391         .dev_configure = eth_dev_configure,
 392         .dev_infos_get = eth_dev_info,
 393         .rx_queue_setup = eth_rx_queue_setup,
 394         .tx_queue_setup = eth_tx_queue_setup,
 395         .rx_queue_release = eth_queue_release,
 396         .tx_queue_release = eth_queue_release,
 397         .link_update = eth_link_update,
 398         .stats_get = eth_stats_get,
 399         .stats_reset = eth_stats_reset,
 400 };
 401
 402 /*
 403  * Opens an AF_PACKET socket
 404  */
 405 static int
 406 open_packet_iface(const char *key __rte_unused,
 407                   const char *value __rte_unused,
 408                   void *extra_args)
 409 {
 410         int *sockfd = extra_args;
 411
 412         /* Open an AF_PACKET socket... */
 413         *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 414         if (*sockfd == -1) {
 415                 RTE_LOG(ERR, PMD, "Could not open AF_PACKET socket\n");
 416                 return -1;
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int
 423 rte_pmd_init_internals(const char *name,
 424                        const int sockfd,
 425                        const unsigned nb_queues,
 426                        unsigned int blocksize,
 427                        unsigned int blockcnt,
 428                        unsigned int framesize,
 429                        unsigned int framecnt,
 430                        const unsigned numa_node,
 431                        struct pmd_internals **internals,
 432                        struct rte_eth_dev **eth_dev,
 433                        struct rte_kvargs *kvlist)
 434 {
 435         struct rte_eth_dev_data *data = NULL;
 436         struct rte_pci_device *pci_dev = NULL;
 437         struct rte_kvargs_pair *pair = NULL;
 438         struct ifreq ifr;
 439         size_t ifnamelen;
 440         unsigned k_idx;
 441         struct sockaddr_ll sockaddr;
 442         struct tpacket_req *req;
 443         struct pkt_rx_queue *rx_queue;
 444         struct pkt_tx_queue *tx_queue;
 445         int rc, tpver, discard;
 446         int qsockfd = -1;
 447         unsigned int i, q, rdsize;
 448         int fanout_arg __rte_unused, bypass __rte_unused;
 449
 450         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 451                 pair = &kvlist->pairs[k_idx];
 452                 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
 453                         break;
 454         }
 455         if (pair == NULL) {
 456                 RTE_LOG(ERR, PMD,
 457                         "%s: no interface specified for AF_PACKET ethdev\n",
 458                         name);
 459                 goto error;
 460         }
 461
 462         RTE_LOG(INFO, PMD,
 463                 "%s: creating AF_PACKET-backed ethdev on numa socket %u\n",
 464                 name, numa_node);
 465
 466         /*
 467          * now do all data allocation - for eth_dev structure, dummy pci driver
 468          * and internal (private) data
 469          */
 470         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 471         if (data == NULL)
 472                 goto error;
 473
 474         pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
 475         if (pci_dev == NULL)
 476                 goto error;
 477
 478         *internals = rte_zmalloc_socket(name, sizeof(**internals),
 479                                         0, numa_node);
 480         if (*internals == NULL)
 481                 goto error;
 482
 483         for (q = 0; q < nb_queues; q++) {
 484                 (*internals)->rx_queue[q].map = MAP_FAILED;
 485                 (*internals)->tx_queue[q].map = MAP_FAILED;
 486         }
 487
 488         req = &((*internals)->req);
 489
 490         req->tp_block_size = blocksize;
 491         req->tp_block_nr = blockcnt;
 492         req->tp_frame_size = framesize;
 493         req->tp_frame_nr = framecnt;
 494
 495         ifnamelen = strlen(pair->value);
 496         if (ifnamelen < sizeof(ifr.ifr_name)) {
 497                 memcpy(ifr.ifr_name, pair->value, ifnamelen);
 498                 ifr.ifr_name[ifnamelen] = '\0';
 499         } else {
 500                 RTE_LOG(ERR, PMD,
 501                         "%s: I/F name too long (%s)\n",
 502                         name, pair->value);
 503                 goto error;
 504         }
 505         if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
 506                 RTE_LOG(ERR, PMD,
 507                         "%s: ioctl failed (SIOCGIFINDEX)\n",
 508                         name);
 509                 goto error;
 510         }
 511         (*internals)->if_index = ifr.ifr_ifindex;
 512
 513         if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
 514                 RTE_LOG(ERR, PMD,
 515                         "%s: ioctl failed (SIOCGIFHWADDR)\n",
 516                         name);
 517                 goto error;
 518         }
 519         memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 520
 521         memset(&sockaddr, 0, sizeof(sockaddr));
 522         sockaddr.sll_family = AF_PACKET;
 523         sockaddr.sll_protocol = htons(ETH_P_ALL);
 524         sockaddr.sll_ifindex = (*internals)->if_index;
 525
 526 #if defined(PACKET_FANOUT)
 527         fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
 528         fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
 529 #if defined(PACKET_FANOUT_FLAG_ROLLOVER)
 530         fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
 531 #endif
 532 #endif
 533
 534         for (q = 0; q < nb_queues; q++) {
 535                 /* Open an AF_PACKET socket for this queue... */
 536                 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 537                 if (qsockfd == -1) {
 538                         RTE_LOG(ERR, PMD,
 539                                 "%s: could not open AF_PACKET socket\n",
 540                                 name);
 541                         return -1;
 542                 }
 543
 544                 tpver = TPACKET_V2;
 545                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
 546                                 &tpver, sizeof(tpver));
 547                 if (rc == -1) {
 548                         RTE_LOG(ERR, PMD,
 549                                 "%s: could not set PACKET_VERSION on AF_PACKET "
 550                                 "socket for %s\n", name, pair->value);
 551                         goto error;
 552                 }
 553
 554                 discard = 1;
 555                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
 556                                 &discard, sizeof(discard));
 557                 if (rc == -1) {
 558                         RTE_LOG(ERR, PMD,
 559                                 "%s: could not set PACKET_LOSS on "
 560                                 "AF_PACKET socket for %s\n", name, pair->value);
 561                         goto error;
 562                 }
 563
 564 #if defined(PACKET_QDISC_BYPASS)
 565                 bypass = 1;
 566                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
 567                                 &bypass, sizeof(bypass));
 568                 if (rc == -1) {
 569                         RTE_LOG(ERR, PMD,
 570                                 "%s: could not set PACKET_QDISC_BYPASS "
 571                                 "on AF_PACKET socket for %s\n", name,
 572                                 pair->value);
 573                         goto error;
 574                 }
 575 #endif
 576
 577                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
 578                 if (rc == -1) {
 579                         RTE_LOG(ERR, PMD,
 580                                 "%s: could not set PACKET_RX_RING on AF_PACKET "
 581                                 "socket for %s\n", name, pair->value);
 582                         goto error;
 583                 }
 584
 585                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
 586                 if (rc == -1) {
 587                         RTE_LOG(ERR, PMD,
 588                                 "%s: could not set PACKET_TX_RING on AF_PACKET "
 589                                 "socket for %s\n", name, pair->value);
 590                         goto error;
 591                 }
 592
 593                 rx_queue = &((*internals)->rx_queue[q]);
 594                 rx_queue->framecount = req->tp_frame_nr;
 595
 596                 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
 597                                     PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
 598                                     qsockfd, 0);
 599                 if (rx_queue->map == MAP_FAILED) {
 600                         RTE_LOG(ERR, PMD,
 601                                 "%s: call to mmap failed on AF_PACKET socket for %s\n",
 602                                 name, pair->value);
 603                         goto error;
 604                 }
 605
 606                 /* rdsize is same for both Tx and Rx */
 607                 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));
 608
 609                 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 610                 if (rx_queue->rd == NULL)
 611                         goto error;
 612                 for (i = 0; i < req->tp_frame_nr; ++i) {
 613                         rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
 614                         rx_queue->rd[i].iov_len = req->tp_frame_size;
 615                 }
 616                 rx_queue->sockfd = qsockfd;
 617
 618                 tx_queue = &((*internals)->tx_queue[q]);
 619                 tx_queue->framecount = req->tp_frame_nr;
 620
 621                 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
 622
 623                 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 624                 if (tx_queue->rd == NULL)
 625                         goto error;
 626                 for (i = 0; i < req->tp_frame_nr; ++i) {
 627                         tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
 628                         tx_queue->rd[i].iov_len = req->tp_frame_size;
 629                 }
 630                 tx_queue->sockfd = qsockfd;
 631
 632                 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
 633                 if (rc == -1) {
 634                         RTE_LOG(ERR, PMD,
 635                                 "%s: could not bind AF_PACKET socket to %s\n",
 636                                 name, pair->value);
 637                         goto error;
 638                 }
 639
 640 #if defined(PACKET_FANOUT)
 641                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
 642                                 &fanout_arg, sizeof(fanout_arg));
 643                 if (rc == -1) {
 644                         RTE_LOG(ERR, PMD,
 645                                 "%s: could not set PACKET_FANOUT on AF_PACKET socket "
 646                                 "for %s\n", name, pair->value);
 647                         goto error;
 648                 }
 649 #endif
 650         }
 651
 652         /* reserve an ethdev entry */
 653         *eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 654         if (*eth_dev == NULL)
 655                 goto error;
 656
 657         /*
 658          * now put it all together
 659          * - store queue data in internals,
 660          * - store numa_node info in pci_driver
 661          * - point eth_dev_data to internals and pci_driver
 662          * - and point eth_dev structure to new eth_dev_data structure
 663          */
 664
 665         (*internals)->nb_queues = nb_queues;
 666
 667         data->dev_private = *internals;
 668         data->port_id = (*eth_dev)->data->port_id;
 669         data->nb_rx_queues = (uint16_t)nb_queues;
 670         data->nb_tx_queues = (uint16_t)nb_queues;
 671         data->dev_link = pmd_link;
 672         data->mac_addrs = &(*internals)->eth_addr;
 673
 674         pci_dev->numa_node = numa_node;
 675
 676         (*eth_dev)->data = data;
 677         (*eth_dev)->dev_ops = &ops;
 678         (*eth_dev)->pci_dev = pci_dev;
 679
 680         return 0;
 681
 682 error:
 683         if (data)
 684                 rte_free(data);
 685         if (pci_dev)
 686                 rte_free(pci_dev);
 687         if (*internals) {
 688                 for (q = 0; q < nb_queues; q++) {
 689                         munmap((*internals)->rx_queue[q].map,
 690                                2 * req->tp_block_size * req->tp_block_nr);
 691                         if ((*internals)->rx_queue[q].rd)
 692                                 rte_free((*internals)->rx_queue[q].rd);
 693                         if ((*internals)->tx_queue[q].rd)
 694                                 rte_free((*internals)->tx_queue[q].rd);
 695                         if (((*internals)->rx_queue[q].sockfd != 0) &&
 696                                 ((*internals)->rx_queue[q].sockfd != qsockfd))
 697                                 close((*internals)->rx_queue[q].sockfd);
 698                 }
 699                 rte_free(*internals);
 700         }
 701         if (qsockfd != -1)
 702                 close(qsockfd);
 703         return -1;
 704 }
 705
 706 static int
 707 rte_eth_from_packet(const char *name,
 708                     int const *sockfd,
 709                     const unsigned numa_node,
 710                     struct rte_kvargs *kvlist)
 711 {
 712         struct pmd_internals *internals = NULL;
 713         struct rte_eth_dev *eth_dev = NULL;
 714         struct rte_kvargs_pair *pair = NULL;
 715         unsigned k_idx;
 716         unsigned int blockcount;
 717         unsigned int blocksize = DFLT_BLOCK_SIZE;
 718         unsigned int framesize = DFLT_FRAME_SIZE;
 719         unsigned int framecount = DFLT_FRAME_COUNT;
 720         unsigned int qpairs = 1;
 721
 722         /* do some parameter checking */
 723         if (*sockfd < 0)
 724                 return -1;
 725
 726         /*
 727          * Walk arguments for configurable settings
 728          */
 729         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 730                 pair = &kvlist->pairs[k_idx];
 731                 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
 732                         qpairs = atoi(pair->value);
 733                         if (qpairs < 1 ||
 734                             qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) {
 735                                 RTE_LOG(ERR, PMD,
 736                                         "%s: invalid qpairs value\n",
 737                                         name);
 738                                 return -1;
 739                         }
 740                         continue;
 741                 }
 742                 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
 743                         blocksize = atoi(pair->value);
 744                         if (!blocksize) {
 745                                 RTE_LOG(ERR, PMD,
 746                                         "%s: invalid blocksize value\n",
 747                                         name);
 748                                 return -1;
 749                         }
 750                         continue;
 751                 }
 752                 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
 753                         framesize = atoi(pair->value);
 754                         if (!framesize) {
 755                                 RTE_LOG(ERR, PMD,
 756                                         "%s: invalid framesize value\n",
 757                                         name);
 758                                 return -1;
 759                         }
 760                         continue;
 761                 }
 762                 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
 763                         framecount = atoi(pair->value);
 764                         if (!framecount) {
 765                                 RTE_LOG(ERR, PMD,
 766                                         "%s: invalid framecount value\n",
 767                                         name);
 768                                 return -1;
 769                         }
 770                         continue;
 771                 }
 772         }
 773
 774         if (framesize > blocksize) {
 775                 RTE_LOG(ERR, PMD,
 776                         "%s: AF_PACKET MMAP frame size exceeds block size!\n",
 777                         name);
 778                 return -1;
 779         }
 780
 781         blockcount = framecount / (blocksize / framesize);
 782         if (!blockcount) {
 783                 RTE_LOG(ERR, PMD,
 784                         "%s: invalid AF_PACKET MMAP parameters\n", name);
 785                 return -1;
 786         }
 787
 788         RTE_LOG(INFO, PMD, "%s: AF_PACKET MMAP parameters:\n", name);
 789         RTE_LOG(INFO, PMD, "%s:\tblock size %d\n", name, blocksize);
 790         RTE_LOG(INFO, PMD, "%s:\tblock count %d\n", name, blockcount);
 791         RTE_LOG(INFO, PMD, "%s:\tframe size %d\n", name, framesize);
 792         RTE_LOG(INFO, PMD, "%s:\tframe count %d\n", name, framecount);
 793
 794         if (rte_pmd_init_internals(name, *sockfd, qpairs,
 795                                    blocksize, blockcount,
 796                                    framesize, framecount,
 797                                    numa_node, &internals, &eth_dev,
 798                                    kvlist) < 0)
 799                 return -1;
 800
 801         eth_dev->rx_pkt_burst = eth_af_packet_rx;
 802         eth_dev->tx_pkt_burst = eth_af_packet_tx;
 803
 804         return 0;
 805 }
 806
 807 int
 808 rte_pmd_af_packet_devinit(const char *name, const char *params)
 809 {
 810         unsigned numa_node;
 811         int ret = 0;
 812         struct rte_kvargs *kvlist;
 813         int sockfd = -1;
 814
 815         RTE_LOG(INFO, PMD, "Initializing pmd_af_packet for %s\n", name);
 816
 817         numa_node = rte_socket_id();
 818
 819         kvlist = rte_kvargs_parse(params, valid_arguments);
 820         if (kvlist == NULL) {
 821                 ret = -1;
 822                 goto exit;
 823         }
 824
 825         /*
 826          * If iface argument is passed we open the NICs and use them for
 827          * reading / writing
 828          */
 829         if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {
 830
 831                 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
 832                                          &open_packet_iface, &sockfd);
 833                 if (ret < 0)
 834                         goto exit;
 835         }
 836
 837         ret = rte_eth_from_packet(name, &sockfd, numa_node, kvlist);
 838         close(sockfd); /* no longer needed */
 839
 840 exit:
 841         rte_kvargs_free(kvlist);
 842         return ret;
 843 }
 844
 845 static struct rte_driver pmd_af_packet_drv = {
 846         .name = "eth_af_packet",
 847         .type = PMD_VDEV,
 848         .init = rte_pmd_af_packet_devinit,
 849 };
 850
 851 PMD_REGISTER_DRIVER(pmd_af_packet_drv);