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