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 = 10000,
 120         .link_duplex = ETH_LINK_FULL_DUPLEX,
 121         .link_status = 0
 122 };
 123
 124 static uint16_t
 125 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 126 {
 127         unsigned i;
 128         struct tpacket2_hdr *ppd;
 129         struct rte_mbuf *mbuf;
 130         uint8_t *pbuf;
 131         struct pkt_rx_queue *pkt_q = queue;
 132         uint16_t num_rx = 0;
 133         unsigned int framecount, framenum;
 134
 135         if (unlikely(nb_pkts == 0))
 136                 return 0;
 137
 138         /*
 139          * Reads the given number of packets from the AF_PACKET socket one by
 140          * one and copies the packet data into a newly allocated mbuf.
 141          */
 142         framecount = pkt_q->framecount;
 143         framenum = pkt_q->framenum;
 144         for (i = 0; i < nb_pkts; i++) {
 145                 /* point at the next incoming frame */
 146                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 147                 if ((ppd->tp_status & TP_STATUS_USER) == 0)
 148                         break;
 149
 150                 /* allocate the next mbuf */
 151                 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
 152                 if (unlikely(mbuf == NULL))
 153                         break;
 154
 155                 /* packet will fit in the mbuf, go ahead and receive it */
 156                 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
 157                 pbuf = (uint8_t *) ppd + ppd->tp_mac;
 158                 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
 159
 160                 /* release incoming frame and advance ring buffer */
 161                 ppd->tp_status = TP_STATUS_KERNEL;
 162                 if (++framenum >= framecount)
 163                         framenum = 0;
 164                 mbuf->port = pkt_q->in_port;
 165
 166                 /* account for the receive frame */
 167                 bufs[i] = mbuf;
 168                 num_rx++;
 169         }
 170         pkt_q->framenum = framenum;
 171         pkt_q->rx_pkts += num_rx;
 172         return num_rx;
 173 }
 174
 175 /*
 176  * Callback to handle sending packets through a real NIC.
 177  */
 178 static uint16_t
 179 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 180 {
 181         struct tpacket2_hdr *ppd;
 182         struct rte_mbuf *mbuf;
 183         uint8_t *pbuf;
 184         unsigned int framecount, framenum;
 185         struct pollfd pfd;
 186         struct pkt_tx_queue *pkt_q = queue;
 187         uint16_t num_tx = 0;
 188         int i;
 189
 190         if (unlikely(nb_pkts == 0))
 191                 return 0;
 192
 193         memset(&pfd, 0, sizeof(pfd));
 194         pfd.fd = pkt_q->sockfd;
 195         pfd.events = POLLOUT;
 196         pfd.revents = 0;
 197
 198         framecount = pkt_q->framecount;
 199         framenum = pkt_q->framenum;
 200         ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 201         for (i = 0; i < nb_pkts; i++) {
 202                 /* point at the next incoming frame */
 203                 if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
 204                     (poll(&pfd, 1, -1) < 0))
 205                                 continue;
 206
 207                 /* copy the tx frame data */
 208                 mbuf = bufs[num_tx];
 209                 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
 210                         sizeof(struct sockaddr_ll);
 211                 memcpy(pbuf, rte_pktmbuf_mtod(mbuf, void*), rte_pktmbuf_data_len(mbuf));
 212                 ppd->tp_len = ppd->tp_snaplen = rte_pktmbuf_data_len(mbuf);
 213
 214                 /* release incoming frame and advance ring buffer */
 215                 ppd->tp_status = TP_STATUS_SEND_REQUEST;
 216                 if (++framenum >= framecount)
 217                         framenum = 0;
 218                 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
 219
 220                 num_tx++;
 221                 rte_pktmbuf_free(mbuf);
 222         }
 223
 224         /* kick-off transmits */
 225         if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1)
 226                 return 0; /* error sending -- no packets transmitted */
 227
 228         pkt_q->framenum = framenum;
 229         pkt_q->tx_pkts += num_tx;
 230         pkt_q->err_pkts += nb_pkts - num_tx;
 231         return num_tx;
 232 }
 233
 234 static int
 235 eth_dev_start(struct rte_eth_dev *dev)
 236 {
 237         dev->data->dev_link.link_status = 1;
 238         return 0;
 239 }
 240
 241 /*
 242  * This function gets called when the current port gets stopped.
 243  */
 244 static void
 245 eth_dev_stop(struct rte_eth_dev *dev)
 246 {
 247         unsigned i;
 248         int sockfd;
 249         struct pmd_internals *internals = dev->data->dev_private;
 250
 251         for (i = 0; i < internals->nb_queues; i++) {
 252                 sockfd = internals->rx_queue[i].sockfd;
 253                 if (sockfd != -1)
 254                         close(sockfd);
 255                 sockfd = internals->tx_queue[i].sockfd;
 256                 if (sockfd != -1)
 257                         close(sockfd);
 258         }
 259
 260         dev->data->dev_link.link_status = 0;
 261 }
 262
 263 static int
 264 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 265 {
 266         return 0;
 267 }
 268
 269 static void
 270 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 271 {
 272         struct pmd_internals *internals = dev->data->dev_private;
 273
 274         dev_info->driver_name = drivername;
 275         dev_info->if_index = internals->if_index;
 276         dev_info->max_mac_addrs = 1;
 277         dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
 278         dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
 279         dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
 280         dev_info->min_rx_bufsize = 0;
 281         dev_info->pci_dev = NULL;
 282 }
 283
 284 static void
 285 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 286 {
 287         unsigned i, imax;
 288         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 289         const struct pmd_internals *internal = dev->data->dev_private;
 290
 291         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 292                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 293         for (i = 0; i < imax; i++) {
 294                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 295                 rx_total += igb_stats->q_ipackets[i];
 296         }
 297
 298         imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
 299                 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
 300         for (i = 0; i < imax; i++) {
 301                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 302                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 303                 tx_total += igb_stats->q_opackets[i];
 304                 tx_err_total += igb_stats->q_errors[i];
 305         }
 306
 307         igb_stats->ipackets = rx_total;
 308         igb_stats->opackets = tx_total;
 309         igb_stats->oerrors = tx_err_total;
 310 }
 311
 312 static void
 313 eth_stats_reset(struct rte_eth_dev *dev)
 314 {
 315         unsigned i;
 316         struct pmd_internals *internal = dev->data->dev_private;
 317
 318         for (i = 0; i < internal->nb_queues; i++)
 319                 internal->rx_queue[i].rx_pkts = 0;
 320
 321         for (i = 0; i < internal->nb_queues; i++) {
 322                 internal->tx_queue[i].tx_pkts = 0;
 323                 internal->tx_queue[i].err_pkts = 0;
 324         }
 325 }
 326
 327 static void
 328 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 329 {
 330 }
 331
 332 static void
 333 eth_queue_release(void *q __rte_unused)
 334 {
 335 }
 336
 337 static int
 338 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 339                 int wait_to_complete __rte_unused)
 340 {
 341         return 0;
 342 }
 343
 344 static int
 345 eth_rx_queue_setup(struct rte_eth_dev *dev,
 346                    uint16_t rx_queue_id,
 347                    uint16_t nb_rx_desc __rte_unused,
 348                    unsigned int socket_id __rte_unused,
 349                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 350                    struct rte_mempool *mb_pool)
 351 {
 352         struct pmd_internals *internals = dev->data->dev_private;
 353         struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
 354         uint16_t buf_size;
 355
 356         pkt_q->mb_pool = mb_pool;
 357
 358         /* Now get the space available for data in the mbuf */
 359         buf_size = (uint16_t)(rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
 360                 RTE_PKTMBUF_HEADROOM);
 361
 362         if (ETH_FRAME_LEN > buf_size) {
 363                 RTE_LOG(ERR, PMD,
 364                         "%s: %d bytes will not fit in mbuf (%d bytes)\n",
 365                         dev->data->name, ETH_FRAME_LEN, buf_size);
 366                 return -ENOMEM;
 367         }
 368
 369         dev->data->rx_queues[rx_queue_id] = pkt_q;
 370         pkt_q->in_port = dev->data->port_id;
 371
 372         return 0;
 373 }
 374
 375 static int
 376 eth_tx_queue_setup(struct rte_eth_dev *dev,
 377                    uint16_t tx_queue_id,
 378                    uint16_t nb_tx_desc __rte_unused,
 379                    unsigned int socket_id __rte_unused,
 380                    const struct rte_eth_txconf *tx_conf __rte_unused)
 381 {
 382
 383         struct pmd_internals *internals = dev->data->dev_private;
 384
 385         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 386         return 0;
 387 }
 388
 389 static const struct eth_dev_ops ops = {
 390         .dev_start = eth_dev_start,
 391         .dev_stop = eth_dev_stop,
 392         .dev_close = eth_dev_close,
 393         .dev_configure = eth_dev_configure,
 394         .dev_infos_get = eth_dev_info,
 395         .rx_queue_setup = eth_rx_queue_setup,
 396         .tx_queue_setup = eth_tx_queue_setup,
 397         .rx_queue_release = eth_queue_release,
 398         .tx_queue_release = eth_queue_release,
 399         .link_update = eth_link_update,
 400         .stats_get = eth_stats_get,
 401         .stats_reset = eth_stats_reset,
 402 };
 403
 404 /*
 405  * Opens an AF_PACKET socket
 406  */
 407 static int
 408 open_packet_iface(const char *key __rte_unused,
 409                   const char *value __rte_unused,
 410                   void *extra_args)
 411 {
 412         int *sockfd = extra_args;
 413
 414         /* Open an AF_PACKET socket... */
 415         *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 416         if (*sockfd == -1) {
 417                 RTE_LOG(ERR, PMD, "Could not open AF_PACKET socket\n");
 418                 return -1;
 419         }
 420
 421         return 0;
 422 }
 423
 424 static int
 425 rte_pmd_init_internals(const char *name,
 426                        const int sockfd,
 427                        const unsigned nb_queues,
 428                        unsigned int blocksize,
 429                        unsigned int blockcnt,
 430                        unsigned int framesize,
 431                        unsigned int framecnt,
 432                        const unsigned numa_node,
 433                        struct pmd_internals **internals,
 434                        struct rte_eth_dev **eth_dev,
 435                        struct rte_kvargs *kvlist)
 436 {
 437         struct rte_eth_dev_data *data = NULL;
 438         struct rte_kvargs_pair *pair = NULL;
 439         struct ifreq ifr;
 440         size_t ifnamelen;
 441         unsigned k_idx;
 442         struct sockaddr_ll sockaddr;
 443         struct tpacket_req *req;
 444         struct pkt_rx_queue *rx_queue;
 445         struct pkt_tx_queue *tx_queue;
 446         int rc, tpver, discard;
 447         int qsockfd = -1;
 448         unsigned int i, q, rdsize;
 449         int fanout_arg __rte_unused, bypass __rte_unused;
 450
 451         for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
 452                 pair = &kvlist->pairs[k_idx];
 453                 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
 454                         break;
 455         }
 456         if (pair == NULL) {
 457                 RTE_LOG(ERR, PMD,
 458                         "%s: no interface specified for AF_PACKET ethdev\n",
 459                         name);
 460                 goto error_early;
 461         }
 462
 463         RTE_LOG(INFO, PMD,
 464                 "%s: creating AF_PACKET-backed ethdev on numa socket %u\n",
 465                 name, numa_node);
 466
 467         /*
 468          * now do all data allocation - for eth_dev structure, dummy pci driver
 469          * and internal (private) data
 470          */
 471         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 472         if (data == NULL)
 473                 goto error_early;
 474
 475         *internals = rte_zmalloc_socket(name, sizeof(**internals),
 476                                         0, numa_node);
 477         if (*internals == NULL)
 478                 goto error_early;
 479
 480         for (q = 0; q < nb_queues; q++) {
 481                 (*internals)->rx_queue[q].map = MAP_FAILED;
 482                 (*internals)->tx_queue[q].map = MAP_FAILED;
 483         }
 484
 485         req = &((*internals)->req);
 486
 487         req->tp_block_size = blocksize;
 488         req->tp_block_nr = blockcnt;
 489         req->tp_frame_size = framesize;
 490         req->tp_frame_nr = framecnt;
 491
 492         ifnamelen = strlen(pair->value);
 493         if (ifnamelen < sizeof(ifr.ifr_name)) {
 494                 memcpy(ifr.ifr_name, pair->value, ifnamelen);
 495                 ifr.ifr_name[ifnamelen] = '\0';
 496         } else {
 497                 RTE_LOG(ERR, PMD,
 498                         "%s: I/F name too long (%s)\n",
 499                         name, pair->value);
 500                 goto error_early;
 501         }
 502         if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
 503                 RTE_LOG(ERR, PMD,
 504                         "%s: ioctl failed (SIOCGIFINDEX)\n",
 505                         name);
 506                 goto error_early;
 507         }
 508         (*internals)->if_index = ifr.ifr_ifindex;
 509
 510         if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
 511                 RTE_LOG(ERR, PMD,
 512                         "%s: ioctl failed (SIOCGIFHWADDR)\n",
 513                         name);
 514                 goto error_early;
 515         }
 516         memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 517
 518         memset(&sockaddr, 0, sizeof(sockaddr));
 519         sockaddr.sll_family = AF_PACKET;
 520         sockaddr.sll_protocol = htons(ETH_P_ALL);
 521         sockaddr.sll_ifindex = (*internals)->if_index;
 522
 523 #if defined(PACKET_FANOUT)
 524         fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
 525         fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
 526 #if defined(PACKET_FANOUT_FLAG_ROLLOVER)
 527         fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
 528 #endif
 529 #endif
 530
 531         for (q = 0; q < nb_queues; q++) {
 532                 /* Open an AF_PACKET socket for this queue... */
 533                 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 534                 if (qsockfd == -1) {
 535                         RTE_LOG(ERR, PMD,
 536                                 "%s: could not open AF_PACKET socket\n",
 537                                 name);
 538                         return -1;
 539                 }
 540
 541                 tpver = TPACKET_V2;
 542                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
 543                                 &tpver, sizeof(tpver));
 544                 if (rc == -1) {
 545                         RTE_LOG(ERR, PMD,
 546                                 "%s: could not set PACKET_VERSION on AF_PACKET "
 547                                 "socket for %s\n", name, pair->value);
 548                         goto error;
 549                 }
 550
 551                 discard = 1;
 552                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
 553                                 &discard, sizeof(discard));
 554                 if (rc == -1) {
 555                         RTE_LOG(ERR, PMD,
 556                                 "%s: could not set PACKET_LOSS on "
 557                                 "AF_PACKET socket for %s\n", name, pair->value);
 558                         goto error;
 559                 }
 560
 561 #if defined(PACKET_QDISC_BYPASS)
 562                 bypass = 1;
 563                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
 564                                 &bypass, sizeof(bypass));
 565                 if (rc == -1) {
 566                         RTE_LOG(ERR, PMD,
 567                                 "%s: could not set PACKET_QDISC_BYPASS "
 568                                 "on AF_PACKET socket for %s\n", name,
 569                                 pair->value);
 570                         goto error;
 571                 }
 572 #endif
 573
 574                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
 575                 if (rc == -1) {
 576                         RTE_LOG(ERR, PMD,
 577                                 "%s: could not set PACKET_RX_RING on AF_PACKET "
 578                                 "socket for %s\n", name, pair->value);
 579                         goto error;
 580                 }
 581
 582                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
 583                 if (rc == -1) {
 584                         RTE_LOG(ERR, PMD,
 585                                 "%s: could not set PACKET_TX_RING on AF_PACKET "
 586                                 "socket for %s\n", name, pair->value);
 587                         goto error;
 588                 }
 589
 590                 rx_queue = &((*internals)->rx_queue[q]);
 591                 rx_queue->framecount = req->tp_frame_nr;
 592
 593                 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
 594                                     PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
 595                                     qsockfd, 0);
 596                 if (rx_queue->map == MAP_FAILED) {
 597                         RTE_LOG(ERR, PMD,
 598                                 "%s: call to mmap failed on AF_PACKET socket for %s\n",
 599                                 name, pair->value);
 600                         goto error;
 601                 }
 602
 603                 /* rdsize is same for both Tx and Rx */
 604                 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));
 605
 606                 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 607                 if (rx_queue->rd == NULL)
 608                         goto error;
 609                 for (i = 0; i < req->tp_frame_nr; ++i) {
 610                         rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
 611                         rx_queue->rd[i].iov_len = req->tp_frame_size;
 612                 }
 613                 rx_queue->sockfd = qsockfd;
 614
 615                 tx_queue = &((*internals)->tx_queue[q]);
 616                 tx_queue->framecount = req->tp_frame_nr;
 617
 618                 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
 619
 620                 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
 621                 if (tx_queue->rd == NULL)
 622                         goto error;
 623                 for (i = 0; i < req->tp_frame_nr; ++i) {
 624                         tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
 625                         tx_queue->rd[i].iov_len = req->tp_frame_size;
 626                 }
 627                 tx_queue->sockfd = qsockfd;
 628
 629                 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
 630                 if (rc == -1) {
 631                         RTE_LOG(ERR, PMD,
 632                                 "%s: could not bind AF_PACKET socket to %s\n",
 633                                 name, pair->value);
 634                         goto error;
 635                 }
 636
 637 #if defined(PACKET_FANOUT)
 638                 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
 639                                 &fanout_arg, sizeof(fanout_arg));
 640                 if (rc == -1) {
 641                         RTE_LOG(ERR, PMD,
 642                                 "%s: could not set PACKET_FANOUT on AF_PACKET socket "
 643                                 "for %s\n", name, pair->value);
 644                         goto error;
 645                 }
 646 #endif
 647         }
 648
 649         /* reserve an ethdev entry */
 650         *eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 651         if (*eth_dev == NULL)
 652                 goto error;
 653
 654         /*
 655          * now put it all together
 656          * - store queue data in internals,
 657          * - store numa_node in eth_dev
 658          * - point eth_dev_data to internals
 659          * - and point eth_dev structure to new eth_dev_data structure
 660          */
 661
 662         (*internals)->nb_queues = nb_queues;
 663
 664         data->dev_private = *internals;
 665         data->port_id = (*eth_dev)->data->port_id;
 666         data->nb_rx_queues = (uint16_t)nb_queues;
 667         data->nb_tx_queues = (uint16_t)nb_queues;
 668         data->dev_link = pmd_link;
 669         data->mac_addrs = &(*internals)->eth_addr;
 670         strncpy(data->name,
 671                 (*eth_dev)->data->name, strlen((*eth_dev)->data->name));
 672
 673         (*eth_dev)->data = data;
 674         (*eth_dev)->dev_ops = &ops;
 675         (*eth_dev)->driver = NULL;
 676         (*eth_dev)->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
 677         (*eth_dev)->data->drv_name = drivername;
 678         (*eth_dev)->data->kdrv = RTE_KDRV_NONE;
 679         (*eth_dev)->data->numa_node = numa_node;
 680
 681         return 0;
 682
 683 error:
 684         if (qsockfd != -1)
 685                 close(qsockfd);
 686         for (q = 0; q < nb_queues; q++) {
 687                 munmap((*internals)->rx_queue[q].map,
 688                        2 * req->tp_block_size * req->tp_block_nr);
 689
 690                 rte_free((*internals)->rx_queue[q].rd);
 691                 rte_free((*internals)->tx_queue[q].rd);
 692                 if (((*internals)->rx_queue[q].sockfd != 0) &&
 693                         ((*internals)->rx_queue[q].sockfd != qsockfd))
 694                         close((*internals)->rx_queue[q].sockfd);
 695         }
 696         rte_free(*internals);
 697 error_early:
 698         rte_free(data);
 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 static 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 int
 842 rte_pmd_af_packet_devuninit(const char *name)
 843 {
 844         struct rte_eth_dev *eth_dev = NULL;
 845         struct pmd_internals *internals;
 846         unsigned q;
 847
 848         RTE_LOG(INFO, PMD, "Closing AF_PACKET ethdev on numa socket %u\n",
 849                         rte_socket_id());
 850
 851         if (name == NULL)
 852                 return -1;
 853
 854         /* find the ethdev entry */
 855         eth_dev = rte_eth_dev_allocated(name);
 856         if (eth_dev == NULL)
 857                 return -1;
 858
 859         internals = eth_dev->data->dev_private;
 860         for (q = 0; q < internals->nb_queues; q++) {
 861                 rte_free(internals->rx_queue[q].rd);
 862                 rte_free(internals->tx_queue[q].rd);
 863         }
 864
 865         rte_free(eth_dev->data->dev_private);
 866         rte_free(eth_dev->data);
 867
 868         rte_eth_dev_release_port(eth_dev);
 869
 870         return 0;
 871 }
 872
 873 static struct rte_driver pmd_af_packet_drv = {
 874         .name = "eth_af_packet",
 875         .type = PMD_VDEV,
 876         .init = rte_pmd_af_packet_devinit,
 877         .uninit = rte_pmd_af_packet_devuninit,
 878 };
 879
 880 PMD_REGISTER_DRIVER(pmd_af_packet_drv);