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 const char *drivername = "AF_PACKET PMD";
 119
 120 static struct rte_eth_link pmd_link = {
 121         .link_speed = ETH_SPEED_NUM_10G,
 122         .link_duplex = ETH_LINK_FULL_DUPLEX,
 123         .link_status = ETH_LINK_DOWN,
 124         .link_autoneg = ETH_LINK_AUTONEG
 125 };
 126
 127 static uint16_t
 128 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 129 {
 130         unsigned i;
 131         struct tpacket2_hdr *ppd;
 132         struct rte_mbuf *mbuf;
 133         uint8_t *pbuf;
 134         struct pkt_rx_queue *pkt_q = queue;
 135         uint16_t num_rx = 0;
 136         unsigned long num_rx_bytes = 0;
 137         unsigned int framecount, framenum;
 138
 139         if (unlikely(nb_pkts == 0))
 140                 return 0;
 141
 142         /*
 143          * Reads the given number of packets from the AF_PACKET socket one by
 144          * one and copies the packet data into a newly allocated mbuf.
 145          */
 146         framecount = pkt_q->framecount;
 147         framenum = pkt_q->framenum;
 148         for (i = 0; i < nb_pkts; i++) {
 149                 /* point at the next incoming frame */
 150                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 151                 if ((ppd->tp_status & TP_STATUS_USER) == 0)
 152                         break;
 153
 154                 /* allocate the next mbuf */
 155                 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
 156                 if (unlikely(mbuf == NULL))
 157                         break;
 158
 159                 /* packet will fit in the mbuf, go ahead and receive it */
 160                 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
 161                 pbuf = (uint8_t *) ppd + ppd->tp_mac;
 162                 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
 163
 164                 /* release incoming frame and advance ring buffer */
 165                 ppd->tp_status = TP_STATUS_KERNEL;
 166                 if (++framenum >= framecount)
 167                         framenum = 0;
 168                 mbuf->port = pkt_q->in_port;
 169
 170                 /* account for the receive frame */
 171                 bufs[i] = mbuf;
 172                 num_rx++;
 173                 num_rx_bytes += mbuf->pkt_len;
 174         }
 175         pkt_q->framenum = framenum;
 176         pkt_q->rx_pkts += num_rx;
 177         pkt_q->rx_bytes += num_rx_bytes;
 178         return num_rx;
 179 }
 180
 181 /*
 182  * Callback to handle sending packets through a real NIC.
 183  */
 184 static uint16_t
 185 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 186 {
 187         struct tpacket2_hdr *ppd;
 188         struct rte_mbuf *mbuf;
 189         uint8_t *pbuf;
 190         unsigned int framecount, framenum;
 191         struct pollfd pfd;
 192         struct pkt_tx_queue *pkt_q = queue;
 193         uint16_t num_tx = 0;
 194         unsigned long num_tx_bytes = 0;
 195         int i;
 196
 197         if (unlikely(nb_pkts == 0))
 198                 return 0;
 199
 200         memset(&pfd, 0, sizeof(pfd));
 201         pfd.fd = pkt_q->sockfd;
 202         pfd.events = POLLOUT;
 203         pfd.revents = 0;
 204
 205         framecount = pkt_q->framecount;
 206         framenum = pkt_q->framenum;
 207         ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 208         for (i = 0; i < nb_pkts; i++) {
 209                 /* point at the next incoming frame */
 210                 if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
 211                     (poll(&pfd, 1, -1) < 0))
 212                                 continue;
 213
 214                 /* copy the tx frame data */
 215                 mbuf = bufs[num_tx];
 216                 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
 217                         sizeof(struct sockaddr_ll);
 218                 memcpy(pbuf, rte_pktmbuf_mtod(mbuf, void*), rte_pktmbuf_data_len(mbuf));
 219                 ppd->tp_len = ppd->tp_snaplen = rte_pktmbuf_data_len(mbuf);
 220
 221                 /* release incoming frame and advance ring buffer */
 222                 ppd->tp_status = TP_STATUS_SEND_REQUEST;
 223                 if (++framenum >= framecount)
 224                         framenum = 0;
 225                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 226
 227                 num_tx++;
 228                 num_tx_bytes += mbuf->pkt_len;
 229                 rte_pktmbuf_free(mbuf);
 230         }
 231
 232         /* kick-off transmits */
 233         if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1)
 234                 return 0; /* error sending -- no packets transmitted */
 235
 236         pkt_q->framenum = framenum;
 237         pkt_q->tx_pkts += num_tx;
 238         pkt_q->err_pkts += nb_pkts - num_tx;
 239         pkt_q->tx_bytes += num_tx_bytes;
 240         return num_tx;
 241 }
 242
 243 static int
 244 eth_dev_start(struct rte_eth_dev *dev)
 245 {
 246         dev->data->dev_link.link_status = ETH_LINK_UP;
 247         return 0;
 248 }
 249
 250 /*
 251  * This function gets called when the current port gets stopped.
 252  */
 253 static void
 254 eth_dev_stop(struct rte_eth_dev *dev)
 255 {
 256         unsigned i;
 257         int sockfd;
 258         struct pmd_internals *internals = dev->data->dev_private;
 259
 260         for (i = 0; i < internals->nb_queues; i++) {
 261                 sockfd = internals->rx_queue[i].sockfd;
 262                 if (sockfd != -1)
 263                         close(sockfd);
 264
 265                 /* Prevent use after free in case tx fd == rx fd */
 266                 if (sockfd != internals->tx_queue[i].sockfd) {
 267                         sockfd = internals->tx_queue[i].sockfd;
 268                         if (sockfd != -1)
 269                                 close(sockfd);
 270                 }
 271
 272                 internals->rx_queue[i].sockfd = -1;
 273                 internals->tx_queue[i].sockfd = -1;
 274         }
 275
 276         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 277 }
 278
 279 static int
 280 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 281 {
 282         return 0;
 283 }
 284
 285 static void
 286 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 287 {
 288         struct pmd_internals *internals = dev->data->dev_private;
 289
 290         dev_info->driver_name = drivername;
 291         dev_info->if_index = internals->if_index;
 292         dev_info->max_mac_addrs = 1;
 293         dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
 294         dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
 295         dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
 296         dev_info->min_rx_bufsize = 0;
 297         dev_info->pci_dev = NULL;
 298 }
 299
 300 static void
 301 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 302 {
 303         unsigned i, imax;
 304         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 305         unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
 306         const struct pmd_internals *internal = dev->data->dev_private;
 307
 308         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 309                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 310         for (i = 0; i < imax; i++) {
 311                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 312                 igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes;
 313                 rx_total += igb_stats->q_ipackets[i];
 314                 rx_bytes_total += igb_stats->q_ibytes[i];
 315         }
 316
 317         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 318                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 319         for (i = 0; i < imax; i++) {
 320                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 321                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 322                 igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes;
 323                 tx_total += igb_stats->q_opackets[i];
 324                 tx_err_total += igb_stats->q_errors[i];
 325                 tx_bytes_total += igb_stats->q_obytes[i];
 326         }
 327
 328         igb_stats->ipackets = rx_total;
 329         igb_stats->ibytes = rx_bytes_total;
 330         igb_stats->opackets = tx_total;
 331         igb_stats->oerrors = tx_err_total;
 332         igb_stats->obytes = tx_bytes_total;
 333 }
 334
 335 static void
 336 eth_stats_reset(struct rte_eth_dev *dev)
 337 {
 338         unsigned i;
 339         struct pmd_internals *internal = dev->data->dev_private;
 340
 341         for (i = 0; i < internal->nb_queues; i++) {
 342                 internal->rx_queue[i].rx_pkts = 0;
 343                 internal->rx_queue[i].rx_bytes = 0;
 344         }
 345
 346         for (i = 0; i < internal->nb_queues; i++) {
 347                 internal->tx_queue[i].tx_pkts = 0;
 348                 internal->tx_queue[i].err_pkts = 0;
 349                 internal->tx_queue[i].tx_bytes = 0;
 350         }
 351 }
 352
 353 static void
 354 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 355 {
 356 }
 357
 358 static void
 359 eth_queue_release(void *q __rte_unused)
 360 {
 361 }
 362
 363 static int
 364 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 365                 int wait_to_complete __rte_unused)
 366 {
 367         return 0;
 368 }
 369
 370 static int
 371 eth_rx_queue_setup(struct rte_eth_dev *dev,
 372                    uint16_t rx_queue_id,
 373                    uint16_t nb_rx_desc __rte_unused,
 374                    unsigned int socket_id __rte_unused,
 375                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 376                    struct rte_mempool *mb_pool)
 377 {
 378         struct pmd_internals *internals = dev->data->dev_private;
 379         struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
 380         uint16_t buf_size;
 381
 382         pkt_q->mb_pool = mb_pool;
 383
 384         /* Now get the space available for data in the mbuf */
 385         buf_size = (uint16_t)(rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
 386                 RTE_PKTMBUF_HEADROOM);
 387
 388         if (ETH_FRAME_LEN > buf_size) {
 389                 RTE_LOG(ERR, PMD,
 390                         "%s: %d bytes will not fit in mbuf (%d bytes)\n",
 391                         dev->data->name, ETH_FRAME_LEN, buf_size);
 392                 return -ENOMEM;
 393         }
 394
 395         dev->data->rx_queues[rx_queue_id] = pkt_q;
 396         pkt_q->in_port = dev->data->port_id;
 397
 398         return 0;
 399 }
 400
 401 static int
 402 eth_tx_queue_setup(struct rte_eth_dev *dev,
 403                    uint16_t tx_queue_id,
 404                    uint16_t nb_tx_desc __rte_unused,
 405                    unsigned int socket_id __rte_unused,
 406                    const struct rte_eth_txconf *tx_conf __rte_unused)
 407 {
 408
 409         struct pmd_internals *internals = dev->data->dev_private;
 410
 411         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 412         return 0;
 413 }
 414
 415 static const struct eth_dev_ops ops = {
 416         .dev_start = eth_dev_start,
 417         .dev_stop = eth_dev_stop,
 418         .dev_close = eth_dev_close,
 419         .dev_configure = eth_dev_configure,
 420         .dev_infos_get = eth_dev_info,
 421         .rx_queue_setup = eth_rx_queue_setup,
 422         .tx_queue_setup = eth_tx_queue_setup,
 423         .rx_queue_release = eth_queue_release,
 424         .tx_queue_release = eth_queue_release,
 425         .link_update = eth_link_update,
 426         .stats_get = eth_stats_get,
 427         .stats_reset = eth_stats_reset,
 428 };
 429
 430 /*
 431  * Opens an AF_PACKET socket
 432  */
 433 static int
 434 open_packet_iface(const char *key __rte_unused,
 435                   const char *value __rte_unused,
 436                   void *extra_args)
 437 {
 438         int *sockfd = extra_args;
 439
 440         /* Open an AF_PACKET socket... */
 441         *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 442         if (*sockfd == -1) {
 443                 RTE_LOG(ERR, PMD, "Could not open AF_PACKET socket\n");
 444                 return -1;
 445         }
 446
 447         return 0;
 448 }
 449
 450 static int
 451 rte_pmd_init_internals(const char *name,
 452                        const int sockfd,
 453                        const unsigned nb_queues,
 454                        unsigned int blocksize,
 455                        unsigned int blockcnt,
 456                        unsigned int framesize,
 457                        unsigned int framecnt,
 458                        const unsigned numa_node,
 459                        struct pmd_internals **internals,
 460                        struct rte_eth_dev **eth_dev,
 461                        struct rte_kvargs *kvlist)
 462 {
 463         struct rte_eth_dev_data *data = NULL;
 464         struct rte_kvargs_pair *pair = NULL;
 465         struct ifreq ifr;
 466         size_t ifnamelen;
 467         unsigned k_idx;
 468         struct sockaddr_ll sockaddr;
 469         struct tpacket_req *req;
 470         struct pkt_rx_queue *rx_queue;
 471         struct pkt_tx_queue *tx_queue;
 472         int rc, tpver, discard;
 473         int qsockfd = -1;
 474         unsigned int i, q, rdsize;
 475         int fanout_arg __rte_unused, bypass __rte_unused;
 476
 477         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 478                 pair = &kvlist->pairs[k_idx];
 479                 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
 480                         break;
 481         }
 482         if (pair == NULL) {
 483                 RTE_LOG(ERR, PMD,
 484                         "%s: no interface specified for AF_PACKET ethdev\n",
 485                         name);
 486                 goto error_early;
 487         }
 488
 489         RTE_LOG(INFO, PMD,
 490                 "%s: creating AF_PACKET-backed ethdev on numa socket %u\n",
 491                 name, numa_node);
 492
 493         /*
 494          * now do all data allocation - for eth_dev structure, dummy pci driver
 495          * and internal (private) data
 496          */
 497         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 498         if (data == NULL)
 499                 goto error_early;
 500
 501         *internals = rte_zmalloc_socket(name, sizeof(**internals),
 502                                         0, numa_node);
 503         if (*internals == NULL)
 504                 goto error_early;
 505
 506         for (q = 0; q < nb_queues; q++) {
 507                 (*internals)->rx_queue[q].map = MAP_FAILED;
 508                 (*internals)->tx_queue[q].map = MAP_FAILED;
 509         }
 510
 511         req = &((*internals)->req);
 512
 513         req->tp_block_size = blocksize;
 514         req->tp_block_nr = blockcnt;
 515         req->tp_frame_size = framesize;
 516         req->tp_frame_nr = framecnt;
 517
 518         ifnamelen = strlen(pair->value);
 519         if (ifnamelen < sizeof(ifr.ifr_name)) {
 520                 memcpy(ifr.ifr_name, pair->value, ifnamelen);
 521                 ifr.ifr_name[ifnamelen] = '\0';
 522         } else {
 523                 RTE_LOG(ERR, PMD,
 524                         "%s: I/F name too long (%s)\n",
 525                         name, pair->value);
 526                 goto error_early;
 527         }
 528         if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
 529                 RTE_LOG(ERR, PMD,
 530                         "%s: ioctl failed (SIOCGIFINDEX)\n",
 531                         name);
 532                 goto error_early;
 533         }
 534         (*internals)->if_index = ifr.ifr_ifindex;
 535
 536         if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
 537                 RTE_LOG(ERR, PMD,
 538                         "%s: ioctl failed (SIOCGIFHWADDR)\n",
 539                         name);
 540                 goto error_early;
 541         }
 542         memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 543
 544         memset(&sockaddr, 0, sizeof(sockaddr));
 545         sockaddr.sll_family = AF_PACKET;
 546         sockaddr.sll_protocol = htons(ETH_P_ALL);
 547         sockaddr.sll_ifindex = (*internals)->if_index;
 548
 549 #if defined(PACKET_FANOUT)
 550         fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
 551         fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
 552 #if defined(PACKET_FANOUT_FLAG_ROLLOVER)
 553         fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
 554 #endif
 555 #endif
 556
 557         for (q = 0; q < nb_queues; q++) {
 558                 /* Open an AF_PACKET socket for this queue... */
 559                 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 560                 if (qsockfd == -1) {
 561                         RTE_LOG(ERR, PMD,
 562                                 "%s: could not open AF_PACKET socket\n",
 563                                 name);
 564                         return -1;
 565                 }
 566
 567                 tpver = TPACKET_V2;
 568                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
 569                                 &tpver, sizeof(tpver));
 570                 if (rc == -1) {
 571                         RTE_LOG(ERR, PMD,
 572                                 "%s: could not set PACKET_VERSION on AF_PACKET "
 573                                 "socket for %s\n", name, pair->value);
 574                         goto error;
 575                 }
 576
 577                 discard = 1;
 578                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
 579                                 &discard, sizeof(discard));
 580                 if (rc == -1) {
 581                         RTE_LOG(ERR, PMD,
 582                                 "%s: could not set PACKET_LOSS on "
 583                                 "AF_PACKET socket for %s\n", name, pair->value);
 584                         goto error;
 585                 }
 586
 587 #if defined(PACKET_QDISC_BYPASS)
 588                 bypass = 1;
 589                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
 590                                 &bypass, sizeof(bypass));
 591                 if (rc == -1) {
 592                         RTE_LOG(ERR, PMD,
 593                                 "%s: could not set PACKET_QDISC_BYPASS "
 594                                 "on AF_PACKET socket for %s\n", name,
 595                                 pair->value);
 596                         goto error;
 597                 }
 598 #endif
 599
 600                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
 601                 if (rc == -1) {
 602                         RTE_LOG(ERR, PMD,
 603                                 "%s: could not set PACKET_RX_RING on AF_PACKET "
 604                                 "socket for %s\n", name, pair->value);
 605                         goto error;
 606                 }
 607
 608                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
 609                 if (rc == -1) {
 610                         RTE_LOG(ERR, PMD,
 611                                 "%s: could not set PACKET_TX_RING on AF_PACKET "
 612                                 "socket for %s\n", name, pair->value);
 613                         goto error;
 614                 }
 615
 616                 rx_queue = &((*internals)->rx_queue[q]);
 617                 rx_queue->framecount = req->tp_frame_nr;
 618
 619                 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
 620                                     PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
 621                                     qsockfd, 0);
 622                 if (rx_queue->map == MAP_FAILED) {
 623                         RTE_LOG(ERR, PMD,
 624                                 "%s: call to mmap failed on AF_PACKET socket for %s\n",
 625                                 name, pair->value);
 626                         goto error;
 627                 }
 628
 629                 /* rdsize is same for both Tx and Rx */
 630                 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));
 631
 632                 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 633                 if (rx_queue->rd == NULL)
 634                         goto error;
 635                 for (i = 0; i < req->tp_frame_nr; ++i) {
 636                         rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
 637                         rx_queue->rd[i].iov_len = req->tp_frame_size;
 638                 }
 639                 rx_queue->sockfd = qsockfd;
 640
 641                 tx_queue = &((*internals)->tx_queue[q]);
 642                 tx_queue->framecount = req->tp_frame_nr;
 643
 644                 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
 645
 646                 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 647                 if (tx_queue->rd == NULL)
 648                         goto error;
 649                 for (i = 0; i < req->tp_frame_nr; ++i) {
 650                         tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
 651                         tx_queue->rd[i].iov_len = req->tp_frame_size;
 652                 }
 653                 tx_queue->sockfd = qsockfd;
 654
 655                 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
 656                 if (rc == -1) {
 657                         RTE_LOG(ERR, PMD,
 658                                 "%s: could not bind AF_PACKET socket to %s\n",
 659                                 name, pair->value);
 660                         goto error;
 661                 }
 662
 663 #if defined(PACKET_FANOUT)
 664                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
 665                                 &fanout_arg, sizeof(fanout_arg));
 666                 if (rc == -1) {
 667                         RTE_LOG(ERR, PMD,
 668                                 "%s: could not set PACKET_FANOUT on AF_PACKET socket "
 669                                 "for %s\n", name, pair->value);
 670                         goto error;
 671                 }
 672 #endif
 673         }
 674
 675         /* reserve an ethdev entry */
 676         *eth_dev = rte_eth_dev_allocate(name);
 677         if (*eth_dev == NULL)
 678                 goto error;
 679
 680         /*
 681          * now put it all together
 682          * - store queue data in internals,
 683          * - store numa_node in eth_dev
 684          * - point eth_dev_data to internals
 685          * - and point eth_dev structure to new eth_dev_data structure
 686          */
 687
 688         (*internals)->nb_queues = nb_queues;
 689
 690         data->dev_private = *internals;
 691         data->port_id = (*eth_dev)->data->port_id;
 692         data->nb_rx_queues = (uint16_t)nb_queues;
 693         data->nb_tx_queues = (uint16_t)nb_queues;
 694         data->dev_link = pmd_link;
 695         data->mac_addrs = &(*internals)->eth_addr;
 696         strncpy(data->name,
 697                 (*eth_dev)->data->name, strlen((*eth_dev)->data->name));
 698
 699         (*eth_dev)->data = data;
 700         (*eth_dev)->dev_ops = &ops;
 701         (*eth_dev)->driver = NULL;
 702         (*eth_dev)->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
 703         (*eth_dev)->data->drv_name = drivername;
 704         (*eth_dev)->data->kdrv = RTE_KDRV_NONE;
 705         (*eth_dev)->data->numa_node = numa_node;
 706
 707         return 0;
 708
 709 error:
 710         if (qsockfd != -1)
 711                 close(qsockfd);
 712         for (q = 0; q < nb_queues; q++) {
 713                 munmap((*internals)->rx_queue[q].map,
 714                        2 * req->tp_block_size * req->tp_block_nr);
 715
 716                 rte_free((*internals)->rx_queue[q].rd);
 717                 rte_free((*internals)->tx_queue[q].rd);
 718                 if (((*internals)->rx_queue[q].sockfd != 0) &&
 719                         ((*internals)->rx_queue[q].sockfd != qsockfd))
 720                         close((*internals)->rx_queue[q].sockfd);
 721         }
 722         rte_free(*internals);
 723 error_early:
 724         rte_free(data);
 725         return -1;
 726 }
 727
 728 static int
 729 rte_eth_from_packet(const char *name,
 730                     int const *sockfd,
 731                     const unsigned numa_node,
 732                     struct rte_kvargs *kvlist)
 733 {
 734         struct pmd_internals *internals = NULL;
 735         struct rte_eth_dev *eth_dev = NULL;
 736         struct rte_kvargs_pair *pair = NULL;
 737         unsigned k_idx;
 738         unsigned int blockcount;
 739         unsigned int blocksize = DFLT_BLOCK_SIZE;
 740         unsigned int framesize = DFLT_FRAME_SIZE;
 741         unsigned int framecount = DFLT_FRAME_COUNT;
 742         unsigned int qpairs = 1;
 743
 744         /* do some parameter checking */
 745         if (*sockfd < 0)
 746                 return -1;
 747
 748         /*
 749          * Walk arguments for configurable settings
 750          */
 751         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 752                 pair = &kvlist->pairs[k_idx];
 753                 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
 754                         qpairs = atoi(pair->value);
 755                         if (qpairs < 1 ||
 756                             qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) {
 757                                 RTE_LOG(ERR, PMD,
 758                                         "%s: invalid qpairs value\n",
 759                                         name);
 760                                 return -1;
 761                         }
 762                         continue;
 763                 }
 764                 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
 765                         blocksize = atoi(pair->value);
 766                         if (!blocksize) {
 767                                 RTE_LOG(ERR, PMD,
 768                                         "%s: invalid blocksize value\n",
 769                                         name);
 770                                 return -1;
 771                         }
 772                         continue;
 773                 }
 774                 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
 775                         framesize = atoi(pair->value);
 776                         if (!framesize) {
 777                                 RTE_LOG(ERR, PMD,
 778                                         "%s: invalid framesize value\n",
 779                                         name);
 780                                 return -1;
 781                         }
 782                         continue;
 783                 }
 784                 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
 785                         framecount = atoi(pair->value);
 786                         if (!framecount) {
 787                                 RTE_LOG(ERR, PMD,
 788                                         "%s: invalid framecount value\n",
 789                                         name);
 790                                 return -1;
 791                         }
 792                         continue;
 793                 }
 794         }
 795
 796         if (framesize > blocksize) {
 797                 RTE_LOG(ERR, PMD,
 798                         "%s: AF_PACKET MMAP frame size exceeds block size!\n",
 799                         name);
 800                 return -1;
 801         }
 802
 803         blockcount = framecount / (blocksize / framesize);
 804         if (!blockcount) {
 805                 RTE_LOG(ERR, PMD,
 806                         "%s: invalid AF_PACKET MMAP parameters\n", name);
 807                 return -1;
 808         }
 809
 810         RTE_LOG(INFO, PMD, "%s: AF_PACKET MMAP parameters:\n", name);
 811         RTE_LOG(INFO, PMD, "%s:\tblock size %d\n", name, blocksize);
 812         RTE_LOG(INFO, PMD, "%s:\tblock count %d\n", name, blockcount);
 813         RTE_LOG(INFO, PMD, "%s:\tframe size %d\n", name, framesize);
 814         RTE_LOG(INFO, PMD, "%s:\tframe count %d\n", name, framecount);
 815
 816         if (rte_pmd_init_internals(name, *sockfd, qpairs,
 817                                    blocksize, blockcount,
 818                                    framesize, framecount,
 819                                    numa_node, &internals, &eth_dev,
 820                                    kvlist) < 0)
 821                 return -1;
 822
 823         eth_dev->rx_pkt_burst = eth_af_packet_rx;
 824         eth_dev->tx_pkt_burst = eth_af_packet_tx;
 825
 826         return 0;
 827 }
 828
 829 static int
 830 rte_pmd_af_packet_probe(const char *name, const char *params)
 831 {
 832         unsigned numa_node;
 833         int ret = 0;
 834         struct rte_kvargs *kvlist;
 835         int sockfd = -1;
 836
 837         RTE_LOG(INFO, PMD, "Initializing pmd_af_packet for %s\n", name);
 838
 839         numa_node = rte_socket_id();
 840
 841         kvlist = rte_kvargs_parse(params, valid_arguments);
 842         if (kvlist == NULL) {
 843                 ret = -1;
 844                 goto exit;
 845         }
 846
 847         /*
 848          * If iface argument is passed we open the NICs and use them for
 849          * reading / writing
 850          */
 851         if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {
 852
 853                 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
 854                                          &open_packet_iface, &sockfd);
 855                 if (ret < 0)
 856                         goto exit;
 857         }
 858
 859         ret = rte_eth_from_packet(name, &sockfd, numa_node, kvlist);
 860         close(sockfd); /* no longer needed */
 861
 862 exit:
 863         rte_kvargs_free(kvlist);
 864         return ret;
 865 }
 866
 867 static int
 868 rte_pmd_af_packet_remove(const char *name)
 869 {
 870         struct rte_eth_dev *eth_dev = NULL;
 871         struct pmd_internals *internals;
 872         unsigned q;
 873
 874         RTE_LOG(INFO, PMD, "Closing AF_PACKET ethdev on numa socket %u\n",
 875                         rte_socket_id());
 876
 877         if (name == NULL)
 878                 return -1;
 879
 880         /* find the ethdev entry */
 881         eth_dev = rte_eth_dev_allocated(name);
 882         if (eth_dev == NULL)
 883                 return -1;
 884
 885         internals = eth_dev->data->dev_private;
 886         for (q = 0; q < internals->nb_queues; q++) {
 887                 rte_free(internals->rx_queue[q].rd);
 888                 rte_free(internals->tx_queue[q].rd);
 889         }
 890
 891         rte_free(eth_dev->data->dev_private);
 892         rte_free(eth_dev->data);
 893
 894         rte_eth_dev_release_port(eth_dev);
 895
 896         return 0;
 897 }
 898
 899 static struct rte_vdev_driver pmd_af_packet_drv = {
 900         .probe = rte_pmd_af_packet_probe,
 901         .remove = rte_pmd_af_packet_remove,
 902 };
 903
 904 RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv);
 905 RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet);
 906 RTE_PMD_REGISTER_PARAM_STRING(net_af_packet,
 907         "iface=<string> "
 908         "qpairs=<int> "
 909         "blocksz=<int> "
 910         "framesz=<int> "
 911         "framecnt=<int>");