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 #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         if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1)
 224                 return 0; /* error sending -- no packets transmitted */
 225
 226         pkt_q->framenum = framenum;
 227         pkt_q->tx_pkts += num_tx;
 228         pkt_q->err_pkts += nb_pkts - num_tx;
 229         return num_tx;
 230 }
 231
 232 static int
 233 eth_dev_start(struct rte_eth_dev *dev)
 234 {
 235         dev->data->dev_link.link_status = 1;
 236         return 0;
 237 }
 238
 239 /*
 240  * This function gets called when the current port gets stopped.
 241  */
 242 static void
 243 eth_dev_stop(struct rte_eth_dev *dev)
 244 {
 245         unsigned i;
 246         int sockfd;
 247         struct pmd_internals *internals = dev->data->dev_private;
 248
 249         for (i = 0; i < internals->nb_queues; i++) {
 250                 sockfd = internals->rx_queue[i].sockfd;
 251                 if (sockfd != -1)
 252                         close(sockfd);
 253                 sockfd = internals->tx_queue[i].sockfd;
 254                 if (sockfd != -1)
 255                         close(sockfd);
 256         }
 257
 258         dev->data->dev_link.link_status = 0;
 259 }
 260
 261 static int
 262 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 263 {
 264         return 0;
 265 }
 266
 267 static void
 268 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 269 {
 270         struct pmd_internals *internals = dev->data->dev_private;
 271
 272         dev_info->driver_name = drivername;
 273         dev_info->if_index = internals->if_index;
 274         dev_info->max_mac_addrs = 1;
 275         dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
 276         dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
 277         dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
 278         dev_info->min_rx_bufsize = 0;
 279         dev_info->pci_dev = NULL;
 280 }
 281
 282 static void
 283 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 284 {
 285         unsigned i, imax;
 286         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 287         const struct pmd_internals *internal = dev->data->dev_private;
 288
 289         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 290                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 291         for (i = 0; i < imax; i++) {
 292                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 293                 rx_total += igb_stats->q_ipackets[i];
 294         }
 295
 296         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 297                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 298         for (i = 0; i < imax; i++) {
 299                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 300                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 301                 tx_total += igb_stats->q_opackets[i];
 302                 tx_err_total += igb_stats->q_errors[i];
 303         }
 304
 305         igb_stats->ipackets = rx_total;
 306         igb_stats->opackets = tx_total;
 307         igb_stats->oerrors = tx_err_total;
 308 }
 309
 310 static void
 311 eth_stats_reset(struct rte_eth_dev *dev)
 312 {
 313         unsigned i;
 314         struct pmd_internals *internal = dev->data->dev_private;
 315
 316         for (i = 0; i < internal->nb_queues; i++)
 317                 internal->rx_queue[i].rx_pkts = 0;
 318
 319         for (i = 0; i < internal->nb_queues; i++) {
 320                 internal->tx_queue[i].tx_pkts = 0;
 321                 internal->tx_queue[i].err_pkts = 0;
 322         }
 323 }
 324
 325 static void
 326 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 327 {
 328 }
 329
 330 static void
 331 eth_queue_release(void *q __rte_unused)
 332 {
 333 }
 334
 335 static int
 336 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 337                 int wait_to_complete __rte_unused)
 338 {
 339         return 0;
 340 }
 341
 342 static int
 343 eth_rx_queue_setup(struct rte_eth_dev *dev,
 344                    uint16_t rx_queue_id,
 345                    uint16_t nb_rx_desc __rte_unused,
 346                    unsigned int socket_id __rte_unused,
 347                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 348                    struct rte_mempool *mb_pool)
 349 {
 350         struct pmd_internals *internals = dev->data->dev_private;
 351         struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
 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         buf_size = (uint16_t)(rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
 358                 RTE_PKTMBUF_HEADROOM);
 359
 360         if (ETH_FRAME_LEN > buf_size) {
 361                 RTE_LOG(ERR, PMD,
 362                         "%s: %d bytes will not fit in mbuf (%d bytes)\n",
 363                         dev->data->name, ETH_FRAME_LEN, buf_size);
 364                 return -ENOMEM;
 365         }
 366
 367         dev->data->rx_queues[rx_queue_id] = pkt_q;
 368
 369         return 0;
 370 }
 371
 372 static int
 373 eth_tx_queue_setup(struct rte_eth_dev *dev,
 374                    uint16_t tx_queue_id,
 375                    uint16_t nb_tx_desc __rte_unused,
 376                    unsigned int socket_id __rte_unused,
 377                    const struct rte_eth_txconf *tx_conf __rte_unused)
 378 {
 379
 380         struct pmd_internals *internals = dev->data->dev_private;
 381
 382         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 383         return 0;
 384 }
 385
 386 static const struct eth_dev_ops ops = {
 387         .dev_start = eth_dev_start,
 388         .dev_stop = eth_dev_stop,
 389         .dev_close = eth_dev_close,
 390         .dev_configure = eth_dev_configure,
 391         .dev_infos_get = eth_dev_info,
 392         .rx_queue_setup = eth_rx_queue_setup,
 393         .tx_queue_setup = eth_tx_queue_setup,
 394         .rx_queue_release = eth_queue_release,
 395         .tx_queue_release = eth_queue_release,
 396         .link_update = eth_link_update,
 397         .stats_get = eth_stats_get,
 398         .stats_reset = eth_stats_reset,
 399 };
 400
 401 /*
 402  * Opens an AF_PACKET socket
 403  */
 404 static int
 405 open_packet_iface(const char *key __rte_unused,
 406                   const char *value __rte_unused,
 407                   void *extra_args)
 408 {
 409         int *sockfd = extra_args;
 410
 411         /* Open an AF_PACKET socket... */
 412         *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 413         if (*sockfd == -1) {
 414                 RTE_LOG(ERR, PMD, "Could not open AF_PACKET socket\n");
 415                 return -1;
 416         }
 417
 418         return 0;
 419 }
 420
 421 static int
 422 rte_pmd_init_internals(const char *name,
 423                        const int sockfd,
 424                        const unsigned nb_queues,
 425                        unsigned int blocksize,
 426                        unsigned int blockcnt,
 427                        unsigned int framesize,
 428                        unsigned int framecnt,
 429                        const unsigned numa_node,
 430                        struct pmd_internals **internals,
 431                        struct rte_eth_dev **eth_dev,
 432                        struct rte_kvargs *kvlist)
 433 {
 434         struct rte_eth_dev_data *data = NULL;
 435         struct rte_kvargs_pair *pair = NULL;
 436         struct ifreq ifr;
 437         size_t ifnamelen;
 438         unsigned k_idx;
 439         struct sockaddr_ll sockaddr;
 440         struct tpacket_req *req;
 441         struct pkt_rx_queue *rx_queue;
 442         struct pkt_tx_queue *tx_queue;
 443         int rc, tpver, discard;
 444         int qsockfd = -1;
 445         unsigned int i, q, rdsize;
 446         int fanout_arg __rte_unused, bypass __rte_unused;
 447
 448         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 449                 pair = &kvlist->pairs[k_idx];
 450                 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
 451                         break;
 452         }
 453         if (pair == NULL) {
 454                 RTE_LOG(ERR, PMD,
 455                         "%s: no interface specified for AF_PACKET ethdev\n",
 456                         name);
 457                 goto error_early;
 458         }
 459
 460         RTE_LOG(INFO, PMD,
 461                 "%s: creating AF_PACKET-backed ethdev on numa socket %u\n",
 462                 name, numa_node);
 463
 464         /*
 465          * now do all data allocation - for eth_dev structure, dummy pci driver
 466          * and internal (private) data
 467          */
 468         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 469         if (data == NULL)
 470                 goto error_early;
 471
 472         *internals = rte_zmalloc_socket(name, sizeof(**internals),
 473                                         0, numa_node);
 474         if (*internals == NULL)
 475                 goto error_early;
 476
 477         for (q = 0; q < nb_queues; q++) {
 478                 (*internals)->rx_queue[q].map = MAP_FAILED;
 479                 (*internals)->tx_queue[q].map = MAP_FAILED;
 480         }
 481
 482         req = &((*internals)->req);
 483
 484         req->tp_block_size = blocksize;
 485         req->tp_block_nr = blockcnt;
 486         req->tp_frame_size = framesize;
 487         req->tp_frame_nr = framecnt;
 488
 489         ifnamelen = strlen(pair->value);
 490         if (ifnamelen < sizeof(ifr.ifr_name)) {
 491                 memcpy(ifr.ifr_name, pair->value, ifnamelen);
 492                 ifr.ifr_name[ifnamelen] = '\0';
 493         } else {
 494                 RTE_LOG(ERR, PMD,
 495                         "%s: I/F name too long (%s)\n",
 496                         name, pair->value);
 497                 goto error_early;
 498         }
 499         if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
 500                 RTE_LOG(ERR, PMD,
 501                         "%s: ioctl failed (SIOCGIFINDEX)\n",
 502                         name);
 503                 goto error_early;
 504         }
 505         (*internals)->if_index = ifr.ifr_ifindex;
 506
 507         if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
 508                 RTE_LOG(ERR, PMD,
 509                         "%s: ioctl failed (SIOCGIFHWADDR)\n",
 510                         name);
 511                 goto error_early;
 512         }
 513         memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 514
 515         memset(&sockaddr, 0, sizeof(sockaddr));
 516         sockaddr.sll_family = AF_PACKET;
 517         sockaddr.sll_protocol = htons(ETH_P_ALL);
 518         sockaddr.sll_ifindex = (*internals)->if_index;
 519
 520 #if defined(PACKET_FANOUT)
 521         fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
 522         fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
 523 #if defined(PACKET_FANOUT_FLAG_ROLLOVER)
 524         fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
 525 #endif
 526 #endif
 527
 528         for (q = 0; q < nb_queues; q++) {
 529                 /* Open an AF_PACKET socket for this queue... */
 530                 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 531                 if (qsockfd == -1) {
 532                         RTE_LOG(ERR, PMD,
 533                                 "%s: could not open AF_PACKET socket\n",
 534                                 name);
 535                         return -1;
 536                 }
 537
 538                 tpver = TPACKET_V2;
 539                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
 540                                 &tpver, sizeof(tpver));
 541                 if (rc == -1) {
 542                         RTE_LOG(ERR, PMD,
 543                                 "%s: could not set PACKET_VERSION on AF_PACKET "
 544                                 "socket for %s\n", name, pair->value);
 545                         goto error;
 546                 }
 547
 548                 discard = 1;
 549                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
 550                                 &discard, sizeof(discard));
 551                 if (rc == -1) {
 552                         RTE_LOG(ERR, PMD,
 553                                 "%s: could not set PACKET_LOSS on "
 554                                 "AF_PACKET socket for %s\n", name, pair->value);
 555                         goto error;
 556                 }
 557
 558 #if defined(PACKET_QDISC_BYPASS)
 559                 bypass = 1;
 560                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
 561                                 &bypass, sizeof(bypass));
 562                 if (rc == -1) {
 563                         RTE_LOG(ERR, PMD,
 564                                 "%s: could not set PACKET_QDISC_BYPASS "
 565                                 "on AF_PACKET socket for %s\n", name,
 566                                 pair->value);
 567                         goto error;
 568                 }
 569 #endif
 570
 571                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
 572                 if (rc == -1) {
 573                         RTE_LOG(ERR, PMD,
 574                                 "%s: could not set PACKET_RX_RING on AF_PACKET "
 575                                 "socket for %s\n", name, pair->value);
 576                         goto error;
 577                 }
 578
 579                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
 580                 if (rc == -1) {
 581                         RTE_LOG(ERR, PMD,
 582                                 "%s: could not set PACKET_TX_RING on AF_PACKET "
 583                                 "socket for %s\n", name, pair->value);
 584                         goto error;
 585                 }
 586
 587                 rx_queue = &((*internals)->rx_queue[q]);
 588                 rx_queue->framecount = req->tp_frame_nr;
 589
 590                 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
 591                                     PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
 592                                     qsockfd, 0);
 593                 if (rx_queue->map == MAP_FAILED) {
 594                         RTE_LOG(ERR, PMD,
 595                                 "%s: call to mmap failed on AF_PACKET socket for %s\n",
 596                                 name, pair->value);
 597                         goto error;
 598                 }
 599
 600                 /* rdsize is same for both Tx and Rx */
 601                 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));
 602
 603                 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 604                 if (rx_queue->rd == NULL)
 605                         goto error;
 606                 for (i = 0; i < req->tp_frame_nr; ++i) {
 607                         rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
 608                         rx_queue->rd[i].iov_len = req->tp_frame_size;
 609                 }
 610                 rx_queue->sockfd = qsockfd;
 611
 612                 tx_queue = &((*internals)->tx_queue[q]);
 613                 tx_queue->framecount = req->tp_frame_nr;
 614
 615                 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
 616
 617                 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 618                 if (tx_queue->rd == NULL)
 619                         goto error;
 620                 for (i = 0; i < req->tp_frame_nr; ++i) {
 621                         tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
 622                         tx_queue->rd[i].iov_len = req->tp_frame_size;
 623                 }
 624                 tx_queue->sockfd = qsockfd;
 625
 626                 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
 627                 if (rc == -1) {
 628                         RTE_LOG(ERR, PMD,
 629                                 "%s: could not bind AF_PACKET socket to %s\n",
 630                                 name, pair->value);
 631                         goto error;
 632                 }
 633
 634 #if defined(PACKET_FANOUT)
 635                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
 636                                 &fanout_arg, sizeof(fanout_arg));
 637                 if (rc == -1) {
 638                         RTE_LOG(ERR, PMD,
 639                                 "%s: could not set PACKET_FANOUT on AF_PACKET socket "
 640                                 "for %s\n", name, pair->value);
 641                         goto error;
 642                 }
 643 #endif
 644         }
 645
 646         /* reserve an ethdev entry */
 647         *eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 648         if (*eth_dev == NULL)
 649                 goto error;
 650
 651         /*
 652          * now put it all together
 653          * - store queue data in internals,
 654          * - store numa_node in eth_dev
 655          * - point eth_dev_data to internals
 656          * - and point eth_dev structure to new eth_dev_data structure
 657          */
 658
 659         (*internals)->nb_queues = nb_queues;
 660
 661         data->dev_private = *internals;
 662         data->port_id = (*eth_dev)->data->port_id;
 663         data->nb_rx_queues = (uint16_t)nb_queues;
 664         data->nb_tx_queues = (uint16_t)nb_queues;
 665         data->dev_link = pmd_link;
 666         data->mac_addrs = &(*internals)->eth_addr;
 667
 668         (*eth_dev)->data = data;
 669         (*eth_dev)->dev_ops = &ops;
 670         (*eth_dev)->driver = NULL;
 671         (*eth_dev)->data->dev_flags = 0;
 672         (*eth_dev)->data->drv_name = drivername;
 673         (*eth_dev)->data->kdrv = RTE_KDRV_NONE;
 674         (*eth_dev)->data->numa_node = numa_node;
 675
 676         return 0;
 677
 678 error:
 679         if (qsockfd != -1)
 680                 close(qsockfd);
 681         for (q = 0; q < nb_queues; q++) {
 682                 munmap((*internals)->rx_queue[q].map,
 683                        2 * req->tp_block_size * req->tp_block_nr);
 684
 685                 rte_free((*internals)->rx_queue[q].rd);
 686                 rte_free((*internals)->tx_queue[q].rd);
 687                 if (((*internals)->rx_queue[q].sockfd != 0) &&
 688                         ((*internals)->rx_queue[q].sockfd != qsockfd))
 689                         close((*internals)->rx_queue[q].sockfd);
 690         }
 691         rte_free(*internals);
 692 error_early:
 693         rte_free(data);
 694         return -1;
 695 }
 696
 697 static int
 698 rte_eth_from_packet(const char *name,
 699                     int const *sockfd,
 700                     const unsigned numa_node,
 701                     struct rte_kvargs *kvlist)
 702 {
 703         struct pmd_internals *internals = NULL;
 704         struct rte_eth_dev *eth_dev = NULL;
 705         struct rte_kvargs_pair *pair = NULL;
 706         unsigned k_idx;
 707         unsigned int blockcount;
 708         unsigned int blocksize = DFLT_BLOCK_SIZE;
 709         unsigned int framesize = DFLT_FRAME_SIZE;
 710         unsigned int framecount = DFLT_FRAME_COUNT;
 711         unsigned int qpairs = 1;
 712
 713         /* do some parameter checking */
 714         if (*sockfd < 0)
 715                 return -1;
 716
 717         /*
 718          * Walk arguments for configurable settings
 719          */
 720         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 721                 pair = &kvlist->pairs[k_idx];
 722                 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
 723                         qpairs = atoi(pair->value);
 724                         if (qpairs < 1 ||
 725                             qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) {
 726                                 RTE_LOG(ERR, PMD,
 727                                         "%s: invalid qpairs value\n",
 728                                         name);
 729                                 return -1;
 730                         }
 731                         continue;
 732                 }
 733                 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
 734                         blocksize = atoi(pair->value);
 735                         if (!blocksize) {
 736                                 RTE_LOG(ERR, PMD,
 737                                         "%s: invalid blocksize value\n",
 738                                         name);
 739                                 return -1;
 740                         }
 741                         continue;
 742                 }
 743                 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
 744                         framesize = atoi(pair->value);
 745                         if (!framesize) {
 746                                 RTE_LOG(ERR, PMD,
 747                                         "%s: invalid framesize value\n",
 748                                         name);
 749                                 return -1;
 750                         }
 751                         continue;
 752                 }
 753                 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
 754                         framecount = atoi(pair->value);
 755                         if (!framecount) {
 756                                 RTE_LOG(ERR, PMD,
 757                                         "%s: invalid framecount value\n",
 758                                         name);
 759                                 return -1;
 760                         }
 761                         continue;
 762                 }
 763         }
 764
 765         if (framesize > blocksize) {
 766                 RTE_LOG(ERR, PMD,
 767                         "%s: AF_PACKET MMAP frame size exceeds block size!\n",
 768                         name);
 769                 return -1;
 770         }
 771
 772         blockcount = framecount / (blocksize / framesize);
 773         if (!blockcount) {
 774                 RTE_LOG(ERR, PMD,
 775                         "%s: invalid AF_PACKET MMAP parameters\n", name);
 776                 return -1;
 777         }
 778
 779         RTE_LOG(INFO, PMD, "%s: AF_PACKET MMAP parameters:\n", name);
 780         RTE_LOG(INFO, PMD, "%s:\tblock size %d\n", name, blocksize);
 781         RTE_LOG(INFO, PMD, "%s:\tblock count %d\n", name, blockcount);
 782         RTE_LOG(INFO, PMD, "%s:\tframe size %d\n", name, framesize);
 783         RTE_LOG(INFO, PMD, "%s:\tframe count %d\n", name, framecount);
 784
 785         if (rte_pmd_init_internals(name, *sockfd, qpairs,
 786                                    blocksize, blockcount,
 787                                    framesize, framecount,
 788                                    numa_node, &internals, &eth_dev,
 789                                    kvlist) < 0)
 790                 return -1;
 791
 792         eth_dev->rx_pkt_burst = eth_af_packet_rx;
 793         eth_dev->tx_pkt_burst = eth_af_packet_tx;
 794
 795         return 0;
 796 }
 797
 798 int
 799 rte_pmd_af_packet_devinit(const char *name, const char *params)
 800 {
 801         unsigned numa_node;
 802         int ret = 0;
 803         struct rte_kvargs *kvlist;
 804         int sockfd = -1;
 805
 806         RTE_LOG(INFO, PMD, "Initializing pmd_af_packet for %s\n", name);
 807
 808         numa_node = rte_socket_id();
 809
 810         kvlist = rte_kvargs_parse(params, valid_arguments);
 811         if (kvlist == NULL) {
 812                 ret = -1;
 813                 goto exit;
 814         }
 815
 816         /*
 817          * If iface argument is passed we open the NICs and use them for
 818          * reading / writing
 819          */
 820         if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {
 821
 822                 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
 823                                          &open_packet_iface, &sockfd);
 824                 if (ret < 0)
 825                         goto exit;
 826         }
 827
 828         ret = rte_eth_from_packet(name, &sockfd, numa_node, kvlist);
 829         close(sockfd); /* no longer needed */
 830
 831 exit:
 832         rte_kvargs_free(kvlist);
 833         return ret;
 834 }
 835
 836 static struct rte_driver pmd_af_packet_drv = {
 837         .name = "eth_af_packet",
 838         .type = PMD_VDEV,
 839         .init = rte_pmd_af_packet_devinit,
 840 };
 841
 842 PMD_REGISTER_DRIVER(pmd_af_packet_drv);