lib/librte_pmd_af_packet/rte_eth_af_packet.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2014 John W. Linville <linville@tuxdriver.com>
   5  *
   6  *   Originally based upon librte_pmd_pcap code:
   7  *
   8  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   9  *   Copyright(c) 2014 6WIND S.A.
  10  *   All rights reserved.
  11  *
  12  *   Redistribution and use in source and binary forms, with or without
  13  *   modification, are permitted provided that the following conditions
  14  *   are met:
  15  *
  16  *     * Redistributions of source code must retain the above copyright
  17  *       notice, this list of conditions and the following disclaimer.
  18  *     * Redistributions in binary form must reproduce the above copyright
  19  *       notice, this list of conditions and the following disclaimer in
  20  *       the documentation and/or other materials provided with the
  21  *       distribution.
  22  *     * Neither the name of Intel Corporation nor the names of its
  23  *       contributors may be used to endorse or promote products derived
  24  *       from this software without specific prior written permission.
  25  *
  26  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  27  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  28  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  29  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  30  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  31  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  32  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  33  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  34  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  35  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  36  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #include <rte_mbuf.h>
  40 #include <rte_ethdev.h>
  41 #include <rte_malloc.h>
  42 #include <rte_kvargs.h>
  43 #include <rte_dev.h>
  44
  45 #include <linux/if_ether.h>
  46 #include <linux/if_packet.h>
  47 #include <arpa/inet.h>
  48 #include <net/if.h>
  49 #include <sys/types.h>
  50 #include <sys/socket.h>
  51 #include <sys/ioctl.h>
  52 #include <sys/mman.h>
  53 #include <unistd.h>
  54 #include <poll.h>
  55
  56 #include "rte_eth_af_packet.h"
  57
  58 #define ETH_AF_PACKET_IFACE_ARG         "iface"
  59 #define ETH_AF_PACKET_NUM_Q_ARG         "qpairs"
  60 #define ETH_AF_PACKET_BLOCKSIZE_ARG     "blocksz"
  61 #define ETH_AF_PACKET_FRAMESIZE_ARG     "framesz"
  62 #define ETH_AF_PACKET_FRAMECOUNT_ARG    "framecnt"
  63
  64 #define DFLT_BLOCK_SIZE         (1 << 12)
  65 #define DFLT_FRAME_SIZE         (1 << 11)
  66 #define DFLT_FRAME_COUNT        (1 << 9)
  67
  68 struct pkt_rx_queue {
  69         int sockfd;
  70
  71         struct iovec *rd;
  72         uint8_t *map;
  73         unsigned int framecount;
  74         unsigned int framenum;
  75
  76         struct rte_mempool *mb_pool;
  77
  78         volatile unsigned long rx_pkts;
  79         volatile unsigned long err_pkts;
  80 };
  81
  82 struct pkt_tx_queue {
  83         int sockfd;
  84
  85         struct iovec *rd;
  86         uint8_t *map;
  87         unsigned int framecount;
  88         unsigned int framenum;
  89
  90         volatile unsigned long tx_pkts;
  91         volatile unsigned long err_pkts;
  92 };
  93
  94 struct pmd_internals {
  95         unsigned nb_queues;
  96
  97         int if_index;
  98         struct ether_addr eth_addr;
  99
 100         struct tpacket_req req;
 101
 102         struct pkt_rx_queue rx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
 103         struct pkt_tx_queue tx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
 104 };
 105
 106 static const char *valid_arguments[] = {
 107         ETH_AF_PACKET_IFACE_ARG,
 108         ETH_AF_PACKET_NUM_Q_ARG,
 109         ETH_AF_PACKET_BLOCKSIZE_ARG,
 110         ETH_AF_PACKET_FRAMESIZE_ARG,
 111         ETH_AF_PACKET_FRAMECOUNT_ARG,
 112         NULL
 113 };
 114
 115 static const char *drivername = "AF_PACKET PMD";
 116
 117 static struct rte_eth_link pmd_link = {
 118         .link_speed = 10000,
 119         .link_duplex = ETH_LINK_FULL_DUPLEX,
 120         .link_status = 0
 121 };
 122
 123 static uint16_t
 124 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 125 {
 126         unsigned i;
 127         struct tpacket2_hdr *ppd;
 128         struct rte_mbuf *mbuf;
 129         uint8_t *pbuf;
 130         struct pkt_rx_queue *pkt_q = queue;
 131         uint16_t num_rx = 0;
 132         unsigned int framecount, framenum;
 133
 134         if (unlikely(nb_pkts == 0))
 135                 return 0;
 136
 137         /*
 138          * Reads the given number of packets from the AF_PACKET socket one by
 139          * one and copies the packet data into a newly allocated mbuf.
 140          */
 141         framecount = pkt_q->framecount;
 142         framenum = pkt_q->framenum;
 143         for (i = 0; i < nb_pkts; i++) {
 144                 /* point at the next incoming frame */
 145                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 146                 if ((ppd->tp_status & TP_STATUS_USER) == 0)
 147                         break;
 148
 149                 /* allocate the next mbuf */
 150                 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
 151                 if (unlikely(mbuf == NULL))
 152                         break;
 153
 154                 /* packet will fit in the mbuf, go ahead and receive it */
 155                 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
 156                 pbuf = (uint8_t *) ppd + ppd->tp_mac;
 157                 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
 158
 159                 /* release incoming frame and advance ring buffer */
 160                 ppd->tp_status = TP_STATUS_KERNEL;
 161                 if (++framenum >= framecount)
 162                         framenum = 0;
 163
 164                 /* account for the receive frame */
 165                 bufs[i] = mbuf;
 166                 num_rx++;
 167         }
 168         pkt_q->framenum = framenum;
 169         pkt_q->rx_pkts += num_rx;
 170         return num_rx;
 171 }
 172
 173 /*
 174  * Callback to handle sending packets through a real NIC.
 175  */
 176 static uint16_t
 177 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 178 {
 179         struct tpacket2_hdr *ppd;
 180         struct rte_mbuf *mbuf;
 181         uint8_t *pbuf;
 182         unsigned int framecount, framenum;
 183         struct pollfd pfd;
 184         struct pkt_tx_queue *pkt_q = queue;
 185         uint16_t num_tx = 0;
 186         int i;
 187
 188         if (unlikely(nb_pkts == 0))
 189                 return 0;
 190
 191         memset(&pfd, 0, sizeof(pfd));
 192         pfd.fd = pkt_q->sockfd;
 193         pfd.events = POLLOUT;
 194         pfd.revents = 0;
 195
 196         framecount = pkt_q->framecount;
 197         framenum = pkt_q->framenum;
 198         ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 199         for (i = 0; i < nb_pkts; i++) {
 200                 /* point at the next incoming frame */
 201                 if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
 202                     (poll(&pfd, 1, -1) < 0))
 203                                 continue;
 204
 205                 /* copy the tx frame data */
 206                 mbuf = bufs[num_tx];
 207                 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
 208                         sizeof(struct sockaddr_ll);
 209                 memcpy(pbuf, rte_pktmbuf_mtod(mbuf, void*), rte_pktmbuf_data_len(mbuf));
 210                 ppd->tp_len = ppd->tp_snaplen = rte_pktmbuf_data_len(mbuf);
 211
 212                 /* release incoming frame and advance ring buffer */
 213                 ppd->tp_status = TP_STATUS_SEND_REQUEST;
 214                 if (++framenum >= framecount)
 215                         framenum = 0;
 216                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 217
 218                 num_tx++;
 219                 rte_pktmbuf_free(mbuf);
 220         }
 221
 222         /* kick-off transmits */
 223         sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
 224
 225         pkt_q->framenum = framenum;
 226         pkt_q->tx_pkts += num_tx;
 227         pkt_q->err_pkts += nb_pkts - num_tx;
 228         return num_tx;
 229 }
 230
 231 static int
 232 eth_dev_start(struct rte_eth_dev *dev)
 233 {
 234         dev->data->dev_link.link_status = 1;
 235         return 0;
 236 }
 237
 238 /*
 239  * This function gets called when the current port gets stopped.
 240  */
 241 static void
 242 eth_dev_stop(struct rte_eth_dev *dev)
 243 {
 244         unsigned i;
 245         int sockfd;
 246         struct pmd_internals *internals = dev->data->dev_private;
 247
 248         for (i = 0; i < internals->nb_queues; i++) {
 249                 sockfd = internals->rx_queue[i].sockfd;
 250                 if (sockfd != -1)
 251                         close(sockfd);
 252                 sockfd = internals->tx_queue[i].sockfd;
 253                 if (sockfd != -1)
 254                         close(sockfd);
 255         }
 256
 257         dev->data->dev_link.link_status = 0;
 258 }
 259
 260 static int
 261 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 262 {
 263         return 0;
 264 }
 265
 266 static void
 267 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 268 {
 269         struct pmd_internals *internals = dev->data->dev_private;
 270
 271         dev_info->driver_name = drivername;
 272         dev_info->if_index = internals->if_index;
 273         dev_info->max_mac_addrs = 1;
 274         dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
 275         dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
 276         dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
 277         dev_info->min_rx_bufsize = 0;
 278         dev_info->pci_dev = NULL;
 279 }
 280
 281 static void
 282 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 283 {
 284         unsigned i, imax;
 285         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 286         const struct pmd_internals *internal = dev->data->dev_private;
 287
 288         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 289                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 290         for (i = 0; i < imax; i++) {
 291                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 292                 rx_total += igb_stats->q_ipackets[i];
 293         }
 294
 295         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 296                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 297         for (i = 0; i < imax; i++) {
 298                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 299                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 300                 tx_total += igb_stats->q_opackets[i];
 301                 tx_err_total += igb_stats->q_errors[i];
 302         }
 303
 304         igb_stats->ipackets = rx_total;
 305         igb_stats->opackets = tx_total;
 306         igb_stats->oerrors = tx_err_total;
 307 }
 308
 309 static void
 310 eth_stats_reset(struct rte_eth_dev *dev)
 311 {
 312         unsigned i;
 313         struct pmd_internals *internal = dev->data->dev_private;
 314
 315         for (i = 0; i < internal->nb_queues; i++)
 316                 internal->rx_queue[i].rx_pkts = 0;
 317
 318         for (i = 0; i < internal->nb_queues; i++) {
 319                 internal->tx_queue[i].tx_pkts = 0;
 320                 internal->tx_queue[i].err_pkts = 0;
 321         }
 322 }
 323
 324 static void
 325 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 326 {
 327 }
 328
 329 static void
 330 eth_queue_release(void *q __rte_unused)
 331 {
 332 }
 333
 334 static int
 335 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 336                 int wait_to_complete __rte_unused)
 337 {
 338         return 0;
 339 }
 340
 341 static int
 342 eth_rx_queue_setup(struct rte_eth_dev *dev,
 343                    uint16_t rx_queue_id,
 344                    uint16_t nb_rx_desc __rte_unused,
 345                    unsigned int socket_id __rte_unused,
 346                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 347                    struct rte_mempool *mb_pool)
 348 {
 349         struct pmd_internals *internals = dev->data->dev_private;
 350         struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
 351         uint16_t buf_size;
 352
 353         pkt_q->mb_pool = mb_pool;
 354
 355         /* Now get the space available for data in the mbuf */
 356         buf_size = (uint16_t)(rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
 357                 RTE_PKTMBUF_HEADROOM);
 358
 359         if (ETH_FRAME_LEN > buf_size) {
 360                 RTE_LOG(ERR, PMD,
 361                         "%s: %d bytes will not fit in mbuf (%d bytes)\n",
 362                         dev->data->name, ETH_FRAME_LEN, buf_size);
 363                 return -ENOMEM;
 364         }
 365
 366         dev->data->rx_queues[rx_queue_id] = pkt_q;
 367
 368         return 0;
 369 }
 370
 371 static int
 372 eth_tx_queue_setup(struct rte_eth_dev *dev,
 373                    uint16_t tx_queue_id,
 374                    uint16_t nb_tx_desc __rte_unused,
 375                    unsigned int socket_id __rte_unused,
 376                    const struct rte_eth_txconf *tx_conf __rte_unused)
 377 {
 378
 379         struct pmd_internals *internals = dev->data->dev_private;
 380
 381         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 382         return 0;
 383 }
 384
 385 static const struct eth_dev_ops ops = {
 386         .dev_start = eth_dev_start,
 387         .dev_stop = eth_dev_stop,
 388         .dev_close = eth_dev_close,
 389         .dev_configure = eth_dev_configure,
 390         .dev_infos_get = eth_dev_info,
 391         .rx_queue_setup = eth_rx_queue_setup,
 392         .tx_queue_setup = eth_tx_queue_setup,
 393         .rx_queue_release = eth_queue_release,
 394         .tx_queue_release = eth_queue_release,
 395         .link_update = eth_link_update,
 396         .stats_get = eth_stats_get,
 397         .stats_reset = eth_stats_reset,
 398 };
 399
 400 /*
 401  * Opens an AF_PACKET socket
 402  */
 403 static int
 404 open_packet_iface(const char *key __rte_unused,
 405                   const char *value __rte_unused,
 406                   void *extra_args)
 407 {
 408         int *sockfd = extra_args;
 409
 410         /* Open an AF_PACKET socket... */
 411         *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 412         if (*sockfd == -1) {
 413                 RTE_LOG(ERR, PMD, "Could not open AF_PACKET socket\n");
 414                 return -1;
 415         }
 416
 417         return 0;
 418 }
 419
 420 static int
 421 rte_pmd_init_internals(const char *name,
 422                        const int sockfd,
 423                        const unsigned nb_queues,
 424                        unsigned int blocksize,
 425                        unsigned int blockcnt,
 426                        unsigned int framesize,
 427                        unsigned int framecnt,
 428                        const unsigned numa_node,
 429                        struct pmd_internals **internals,
 430                        struct rte_eth_dev **eth_dev,
 431                        struct rte_kvargs *kvlist)
 432 {
 433         struct rte_eth_dev_data *data = NULL;
 434         struct rte_pci_device *pci_dev = 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;
 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;
 471
 472         pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
 473         if (pci_dev == NULL)
 474                 goto error;
 475
 476         *internals = rte_zmalloc_socket(name, sizeof(**internals),
 477                                         0, numa_node);
 478         if (*internals == NULL)
 479                 goto error;
 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;
 502         }
 503         if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
 504                 RTE_LOG(ERR, PMD,
 505                         "%s: ioctl failed (SIOCGIFINDEX)\n",
 506                         name);
 507                 goto error;
 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;
 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 info in pci_driver
 659          * - point eth_dev_data to internals and pci_driver
 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
 672         pci_dev->numa_node = numa_node;
 673
 674         (*eth_dev)->data = data;
 675         (*eth_dev)->dev_ops = &ops;
 676         (*eth_dev)->pci_dev = pci_dev;
 677
 678         return 0;
 679
 680 error:
 681         rte_free(data);
 682         rte_free(pci_dev);
 683
 684         if (*internals) {
 685                 for (q = 0; q < nb_queues; q++) {
 686                         munmap((*internals)->rx_queue[q].map,
 687                                2 * req->tp_block_size * req->tp_block_nr);
 688
 689                         rte_free((*internals)->rx_queue[q].rd);
 690                         rte_free((*internals)->tx_queue[q].rd);
 691                         if (((*internals)->rx_queue[q].sockfd != 0) &&
 692                                 ((*internals)->rx_queue[q].sockfd != qsockfd))
 693                                 close((*internals)->rx_queue[q].sockfd);
 694                 }
 695                 rte_free(*internals);
 696         }
 697         if (qsockfd != -1)
 698                 close(qsockfd);
 699         return -1;
 700 }
 701
 702 static int
 703 rte_eth_from_packet(const char *name,
 704                     int const *sockfd,
 705                     const unsigned numa_node,
 706                     struct rte_kvargs *kvlist)
 707 {
 708         struct pmd_internals *internals = NULL;
 709         struct rte_eth_dev *eth_dev = NULL;
 710         struct rte_kvargs_pair *pair = NULL;
 711         unsigned k_idx;
 712         unsigned int blockcount;
 713         unsigned int blocksize = DFLT_BLOCK_SIZE;
 714         unsigned int framesize = DFLT_FRAME_SIZE;
 715         unsigned int framecount = DFLT_FRAME_COUNT;
 716         unsigned int qpairs = 1;
 717
 718         /* do some parameter checking */
 719         if (*sockfd < 0)
 720                 return -1;
 721
 722         /*
 723          * Walk arguments for configurable settings
 724          */
 725         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 726                 pair = &kvlist->pairs[k_idx];
 727                 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
 728                         qpairs = atoi(pair->value);
 729                         if (qpairs < 1 ||
 730                             qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) {
 731                                 RTE_LOG(ERR, PMD,
 732                                         "%s: invalid qpairs value\n",
 733                                         name);
 734                                 return -1;
 735                         }
 736                         continue;
 737                 }
 738                 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
 739                         blocksize = atoi(pair->value);
 740                         if (!blocksize) {
 741                                 RTE_LOG(ERR, PMD,
 742                                         "%s: invalid blocksize value\n",
 743                                         name);
 744                                 return -1;
 745                         }
 746                         continue;
 747                 }
 748                 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
 749                         framesize = atoi(pair->value);
 750                         if (!framesize) {
 751                                 RTE_LOG(ERR, PMD,
 752                                         "%s: invalid framesize value\n",
 753                                         name);
 754                                 return -1;
 755                         }
 756                         continue;
 757                 }
 758                 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
 759                         framecount = atoi(pair->value);
 760                         if (!framecount) {
 761                                 RTE_LOG(ERR, PMD,
 762                                         "%s: invalid framecount value\n",
 763                                         name);
 764                                 return -1;
 765                         }
 766                         continue;
 767                 }
 768         }
 769
 770         if (framesize > blocksize) {
 771                 RTE_LOG(ERR, PMD,
 772                         "%s: AF_PACKET MMAP frame size exceeds block size!\n",
 773                         name);
 774                 return -1;
 775         }
 776
 777         blockcount = framecount / (blocksize / framesize);
 778         if (!blockcount) {
 779                 RTE_LOG(ERR, PMD,
 780                         "%s: invalid AF_PACKET MMAP parameters\n", name);
 781                 return -1;
 782         }
 783
 784         RTE_LOG(INFO, PMD, "%s: AF_PACKET MMAP parameters:\n", name);
 785         RTE_LOG(INFO, PMD, "%s:\tblock size %d\n", name, blocksize);
 786         RTE_LOG(INFO, PMD, "%s:\tblock count %d\n", name, blockcount);
 787         RTE_LOG(INFO, PMD, "%s:\tframe size %d\n", name, framesize);
 788         RTE_LOG(INFO, PMD, "%s:\tframe count %d\n", name, framecount);
 789
 790         if (rte_pmd_init_internals(name, *sockfd, qpairs,
 791                                    blocksize, blockcount,
 792                                    framesize, framecount,
 793                                    numa_node, &internals, &eth_dev,
 794                                    kvlist) < 0)
 795                 return -1;
 796
 797         eth_dev->rx_pkt_burst = eth_af_packet_rx;
 798         eth_dev->tx_pkt_burst = eth_af_packet_tx;
 799
 800         return 0;
 801 }
 802
 803 int
 804 rte_pmd_af_packet_devinit(const char *name, const char *params)
 805 {
 806         unsigned numa_node;
 807         int ret = 0;
 808         struct rte_kvargs *kvlist;
 809         int sockfd = -1;
 810
 811         RTE_LOG(INFO, PMD, "Initializing pmd_af_packet for %s\n", name);
 812
 813         numa_node = rte_socket_id();
 814
 815         kvlist = rte_kvargs_parse(params, valid_arguments);
 816         if (kvlist == NULL) {
 817                 ret = -1;
 818                 goto exit;
 819         }
 820
 821         /*
 822          * If iface argument is passed we open the NICs and use them for
 823          * reading / writing
 824          */
 825         if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {
 826
 827                 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
 828                                          &open_packet_iface, &sockfd);
 829                 if (ret < 0)
 830                         goto exit;
 831         }
 832
 833         ret = rte_eth_from_packet(name, &sockfd, numa_node, kvlist);
 834         close(sockfd); /* no longer needed */
 835
 836 exit:
 837         rte_kvargs_free(kvlist);
 838         return ret;
 839 }
 840
 841 static struct rte_driver pmd_af_packet_drv = {
 842         .name = "eth_af_packet",
 843         .type = PMD_VDEV,
 844         .init = rte_pmd_af_packet_devinit,
 845 };
 846
 847 PMD_REGISTER_DRIVER(pmd_af_packet_drv);