drivers/net/null/rte_eth_null.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (C) IGEL Co.,Ltd.
   5  *   All rights reserved.
   6  *
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   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of IGEL Co.,Ltd. nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <rte_mbuf.h>
  35 #include <rte_ethdev_driver.h>
  36 #include <rte_ethdev_vdev.h>
  37 #include <rte_malloc.h>
  38 #include <rte_memcpy.h>
  39 #include <rte_bus_vdev.h>
  40 #include <rte_kvargs.h>
  41 #include <rte_spinlock.h>
  42
  43 #define ETH_NULL_PACKET_SIZE_ARG        "size"
  44 #define ETH_NULL_PACKET_COPY_ARG        "copy"
  45
  46 static unsigned default_packet_size = 64;
  47 static unsigned default_packet_copy;
  48
  49 static const char *valid_arguments[] = {
  50         ETH_NULL_PACKET_SIZE_ARG,
  51         ETH_NULL_PACKET_COPY_ARG,
  52         NULL
  53 };
  54
  55 struct pmd_internals;
  56
  57 struct null_queue {
  58         struct pmd_internals *internals;
  59
  60         struct rte_mempool *mb_pool;
  61         struct rte_mbuf *dummy_packet;
  62
  63         rte_atomic64_t rx_pkts;
  64         rte_atomic64_t tx_pkts;
  65         rte_atomic64_t err_pkts;
  66 };
  67
  68 struct pmd_internals {
  69         unsigned packet_size;
  70         unsigned packet_copy;
  71         uint16_t port_id;
  72
  73         struct null_queue rx_null_queues[RTE_MAX_QUEUES_PER_PORT];
  74         struct null_queue tx_null_queues[RTE_MAX_QUEUES_PER_PORT];
  75
  76         struct rte_ether_addr eth_addr;
  77         /** Bit mask of RSS offloads, the bit offset also means flow type */
  78         uint64_t flow_type_rss_offloads;
  79
  80         rte_spinlock_t rss_lock;
  81
  82         uint16_t reta_size;
  83         struct rte_eth_rss_reta_entry64 reta_conf[ETH_RSS_RETA_SIZE_128 /
  84                         RTE_RETA_GROUP_SIZE];
  85
  86         uint8_t rss_key[40];                /**< 40-byte hash key. */
  87 };
  88 static struct rte_eth_link pmd_link = {
  89         .link_speed = ETH_SPEED_NUM_10G,
  90         .link_duplex = ETH_LINK_FULL_DUPLEX,
  91         .link_status = ETH_LINK_DOWN,
  92         .link_autoneg = ETH_LINK_FIXED,
  93 };
  94
  95 static int eth_null_logtype;
  96
  97 #define PMD_LOG(level, fmt, args...) \
  98         rte_log(RTE_LOG_ ## level, eth_null_logtype, \
  99                 "%s(): " fmt "\n", __func__, ##args)
 100
 101 static uint16_t
 102 eth_null_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 103 {
 104         int i;
 105         struct null_queue *h = q;
 106         unsigned packet_size;
 107
 108         if ((q == NULL) || (bufs == NULL))
 109                 return 0;
 110
 111         packet_size = h->internals->packet_size;
 112         if (rte_pktmbuf_alloc_bulk(h->mb_pool, bufs, nb_bufs) != 0)
 113                 return 0;
 114
 115         for (i = 0; i < nb_bufs; i++) {
 116                 bufs[i]->data_len = (uint16_t)packet_size;
 117                 bufs[i]->pkt_len = packet_size;
 118                 bufs[i]->port = h->internals->port_id;
 119         }
 120
 121         rte_atomic64_add(&(h->rx_pkts), i);
 122
 123         return i;
 124 }
 125
 126 static uint16_t
 127 eth_null_copy_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 128 {
 129         int i;
 130         struct null_queue *h = q;
 131         unsigned packet_size;
 132
 133         if ((q == NULL) || (bufs == NULL))
 134                 return 0;
 135
 136         packet_size = h->internals->packet_size;
 137         if (rte_pktmbuf_alloc_bulk(h->mb_pool, bufs, nb_bufs) != 0)
 138                 return 0;
 139
 140         for (i = 0; i < nb_bufs; i++) {
 141                 rte_memcpy(rte_pktmbuf_mtod(bufs[i], void *), h->dummy_packet,
 142                                         packet_size);
 143                 bufs[i]->data_len = (uint16_t)packet_size;
 144                 bufs[i]->pkt_len = packet_size;
 145                 bufs[i]->port = h->internals->port_id;
 146         }
 147
 148         rte_atomic64_add(&(h->rx_pkts), i);
 149
 150         return i;
 151 }
 152
 153 static uint16_t
 154 eth_null_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 155 {
 156         int i;
 157         struct null_queue *h = q;
 158
 159         if ((q == NULL) || (bufs == NULL))
 160                 return 0;
 161
 162         for (i = 0; i < nb_bufs; i++)
 163                 rte_pktmbuf_free(bufs[i]);
 164
 165         rte_atomic64_add(&(h->tx_pkts), i);
 166
 167         return i;
 168 }
 169
 170 static uint16_t
 171 eth_null_copy_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 172 {
 173         int i;
 174         struct null_queue *h = q;
 175         unsigned packet_size;
 176
 177         if ((q == NULL) || (bufs == NULL))
 178                 return 0;
 179
 180         packet_size = h->internals->packet_size;
 181         for (i = 0; i < nb_bufs; i++) {
 182                 rte_memcpy(h->dummy_packet, rte_pktmbuf_mtod(bufs[i], void *),
 183                                         packet_size);
 184                 rte_pktmbuf_free(bufs[i]);
 185         }
 186
 187         rte_atomic64_add(&(h->tx_pkts), i);
 188
 189         return i;
 190 }
 191
 192 static int
 193 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 194 {
 195         return 0;
 196 }
 197
 198 static int
 199 eth_dev_start(struct rte_eth_dev *dev)
 200 {
 201         if (dev == NULL)
 202                 return -EINVAL;
 203
 204         dev->data->dev_link.link_status = ETH_LINK_UP;
 205         return 0;
 206 }
 207
 208 static void
 209 eth_dev_stop(struct rte_eth_dev *dev)
 210 {
 211         if (dev == NULL)
 212                 return;
 213
 214         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 215 }
 216
 217 static int
 218 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 219                 uint16_t nb_rx_desc __rte_unused,
 220                 unsigned int socket_id __rte_unused,
 221                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 222                 struct rte_mempool *mb_pool)
 223 {
 224         struct rte_mbuf *dummy_packet;
 225         struct pmd_internals *internals;
 226         unsigned packet_size;
 227
 228         if ((dev == NULL) || (mb_pool == NULL))
 229                 return -EINVAL;
 230
 231         internals = dev->data->dev_private;
 232
 233         if (rx_queue_id >= dev->data->nb_rx_queues)
 234                 return -ENODEV;
 235
 236         packet_size = internals->packet_size;
 237
 238         internals->rx_null_queues[rx_queue_id].mb_pool = mb_pool;
 239         dev->data->rx_queues[rx_queue_id] =
 240                 &internals->rx_null_queues[rx_queue_id];
 241         dummy_packet = rte_zmalloc_socket(NULL,
 242                         packet_size, 0, dev->data->numa_node);
 243         if (dummy_packet == NULL)
 244                 return -ENOMEM;
 245
 246         internals->rx_null_queues[rx_queue_id].internals = internals;
 247         internals->rx_null_queues[rx_queue_id].dummy_packet = dummy_packet;
 248
 249         return 0;
 250 }
 251
 252 static int
 253 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 254                 uint16_t nb_tx_desc __rte_unused,
 255                 unsigned int socket_id __rte_unused,
 256                 const struct rte_eth_txconf *tx_conf __rte_unused)
 257 {
 258         struct rte_mbuf *dummy_packet;
 259         struct pmd_internals *internals;
 260         unsigned packet_size;
 261
 262         if (dev == NULL)
 263                 return -EINVAL;
 264
 265         internals = dev->data->dev_private;
 266
 267         if (tx_queue_id >= dev->data->nb_tx_queues)
 268                 return -ENODEV;
 269
 270         packet_size = internals->packet_size;
 271
 272         dev->data->tx_queues[tx_queue_id] =
 273                 &internals->tx_null_queues[tx_queue_id];
 274         dummy_packet = rte_zmalloc_socket(NULL,
 275                         packet_size, 0, dev->data->numa_node);
 276         if (dummy_packet == NULL)
 277                 return -ENOMEM;
 278
 279         internals->tx_null_queues[tx_queue_id].internals = internals;
 280         internals->tx_null_queues[tx_queue_id].dummy_packet = dummy_packet;
 281
 282         return 0;
 283 }
 284
 285 static int
 286 eth_mtu_set(struct rte_eth_dev *dev __rte_unused, uint16_t mtu __rte_unused)
 287 {
 288         return 0;
 289 }
 290
 291 static void
 292 eth_dev_info(struct rte_eth_dev *dev,
 293                 struct rte_eth_dev_info *dev_info)
 294 {
 295         struct pmd_internals *internals;
 296
 297         if ((dev == NULL) || (dev_info == NULL))
 298                 return;
 299
 300         internals = dev->data->dev_private;
 301         dev_info->max_mac_addrs = 1;
 302         dev_info->max_rx_pktlen = (uint32_t)-1;
 303         dev_info->max_rx_queues = RTE_DIM(internals->rx_null_queues);
 304         dev_info->max_tx_queues = RTE_DIM(internals->tx_null_queues);
 305         dev_info->min_rx_bufsize = 0;
 306         dev_info->reta_size = internals->reta_size;
 307         dev_info->flow_type_rss_offloads = internals->flow_type_rss_offloads;
 308 }
 309
 310 static int
 311 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 312 {
 313         unsigned i, num_stats;
 314         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 315         const struct pmd_internals *internal;
 316
 317         if ((dev == NULL) || (igb_stats == NULL))
 318                 return -EINVAL;
 319
 320         internal = dev->data->dev_private;
 321         num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 322                         RTE_MIN(dev->data->nb_rx_queues,
 323                                 RTE_DIM(internal->rx_null_queues)));
 324         for (i = 0; i < num_stats; i++) {
 325                 igb_stats->q_ipackets[i] =
 326                         internal->rx_null_queues[i].rx_pkts.cnt;
 327                 rx_total += igb_stats->q_ipackets[i];
 328         }
 329
 330         num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 331                         RTE_MIN(dev->data->nb_tx_queues,
 332                                 RTE_DIM(internal->tx_null_queues)));
 333         for (i = 0; i < num_stats; i++) {
 334                 igb_stats->q_opackets[i] =
 335                         internal->tx_null_queues[i].tx_pkts.cnt;
 336                 igb_stats->q_errors[i] =
 337                         internal->tx_null_queues[i].err_pkts.cnt;
 338                 tx_total += igb_stats->q_opackets[i];
 339                 tx_err_total += igb_stats->q_errors[i];
 340         }
 341
 342         igb_stats->ipackets = rx_total;
 343         igb_stats->opackets = tx_total;
 344         igb_stats->oerrors = tx_err_total;
 345
 346         return 0;
 347 }
 348
 349 static void
 350 eth_stats_reset(struct rte_eth_dev *dev)
 351 {
 352         unsigned i;
 353         struct pmd_internals *internal;
 354
 355         if (dev == NULL)
 356                 return;
 357
 358         internal = dev->data->dev_private;
 359         for (i = 0; i < RTE_DIM(internal->rx_null_queues); i++)
 360                 internal->rx_null_queues[i].rx_pkts.cnt = 0;
 361         for (i = 0; i < RTE_DIM(internal->tx_null_queues); i++) {
 362                 internal->tx_null_queues[i].tx_pkts.cnt = 0;
 363                 internal->tx_null_queues[i].err_pkts.cnt = 0;
 364         }
 365 }
 366
 367 static void
 368 eth_queue_release(void *q)
 369 {
 370         struct null_queue *nq;
 371
 372         if (q == NULL)
 373                 return;
 374
 375         nq = q;
 376         rte_free(nq->dummy_packet);
 377 }
 378
 379 static int
 380 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 381                 int wait_to_complete __rte_unused) { return 0; }
 382
 383 static int
 384 eth_rss_reta_update(struct rte_eth_dev *dev,
 385                 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
 386 {
 387         int i, j;
 388         struct pmd_internals *internal = dev->data->dev_private;
 389
 390         if (reta_size != internal->reta_size)
 391                 return -EINVAL;
 392
 393         rte_spinlock_lock(&internal->rss_lock);
 394
 395         /* Copy RETA table */
 396         for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
 397                 internal->reta_conf[i].mask = reta_conf[i].mask;
 398                 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
 399                         if ((reta_conf[i].mask >> j) & 0x01)
 400                                 internal->reta_conf[i].reta[j] = reta_conf[i].reta[j];
 401         }
 402
 403         rte_spinlock_unlock(&internal->rss_lock);
 404
 405         return 0;
 406 }
 407
 408 static int
 409 eth_rss_reta_query(struct rte_eth_dev *dev,
 410                 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
 411 {
 412         int i, j;
 413         struct pmd_internals *internal = dev->data->dev_private;
 414
 415         if (reta_size != internal->reta_size)
 416                 return -EINVAL;
 417
 418         rte_spinlock_lock(&internal->rss_lock);
 419
 420         /* Copy RETA table */
 421         for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
 422                 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
 423                         if ((reta_conf[i].mask >> j) & 0x01)
 424                                 reta_conf[i].reta[j] = internal->reta_conf[i].reta[j];
 425         }
 426
 427         rte_spinlock_unlock(&internal->rss_lock);
 428
 429         return 0;
 430 }
 431
 432 static int
 433 eth_rss_hash_update(struct rte_eth_dev *dev, struct rte_eth_rss_conf *rss_conf)
 434 {
 435         struct pmd_internals *internal = dev->data->dev_private;
 436
 437         rte_spinlock_lock(&internal->rss_lock);
 438
 439         if ((rss_conf->rss_hf & internal->flow_type_rss_offloads) != 0)
 440                 dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf =
 441                                 rss_conf->rss_hf & internal->flow_type_rss_offloads;
 442
 443         if (rss_conf->rss_key)
 444                 rte_memcpy(internal->rss_key, rss_conf->rss_key, 40);
 445
 446         rte_spinlock_unlock(&internal->rss_lock);
 447
 448         return 0;
 449 }
 450
 451 static int
 452 eth_rss_hash_conf_get(struct rte_eth_dev *dev,
 453                 struct rte_eth_rss_conf *rss_conf)
 454 {
 455         struct pmd_internals *internal = dev->data->dev_private;
 456
 457         rte_spinlock_lock(&internal->rss_lock);
 458
 459         rss_conf->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 460         if (rss_conf->rss_key)
 461                 rte_memcpy(rss_conf->rss_key, internal->rss_key, 40);
 462
 463         rte_spinlock_unlock(&internal->rss_lock);
 464
 465         return 0;
 466 }
 467
 468 static int
 469 eth_mac_address_set(__rte_unused struct rte_eth_dev *dev,
 470                     __rte_unused struct rte_ether_addr *addr)
 471 {
 472         return 0;
 473 }
 474
 475 static const struct eth_dev_ops ops = {
 476         .dev_start = eth_dev_start,
 477         .dev_stop = eth_dev_stop,
 478         .dev_configure = eth_dev_configure,
 479         .dev_infos_get = eth_dev_info,
 480         .rx_queue_setup = eth_rx_queue_setup,
 481         .tx_queue_setup = eth_tx_queue_setup,
 482         .rx_queue_release = eth_queue_release,
 483         .tx_queue_release = eth_queue_release,
 484         .mtu_set = eth_mtu_set,
 485         .link_update = eth_link_update,
 486         .mac_addr_set = eth_mac_address_set,
 487         .stats_get = eth_stats_get,
 488         .stats_reset = eth_stats_reset,
 489         .reta_update = eth_rss_reta_update,
 490         .reta_query = eth_rss_reta_query,
 491         .rss_hash_update = eth_rss_hash_update,
 492         .rss_hash_conf_get = eth_rss_hash_conf_get
 493 };
 494
 495 static struct rte_vdev_driver pmd_null_drv;
 496
 497 static int
 498 eth_dev_null_create(struct rte_vdev_device *dev,
 499                 unsigned packet_size,
 500                 unsigned packet_copy)
 501 {
 502         const unsigned nb_rx_queues = 1;
 503         const unsigned nb_tx_queues = 1;
 504         struct rte_eth_dev_data *data;
 505         struct pmd_internals *internals = NULL;
 506         struct rte_eth_dev *eth_dev = NULL;
 507
 508         static const uint8_t default_rss_key[40] = {
 509                 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2, 0x41, 0x67, 0x25, 0x3D,
 510                 0x43, 0xA3, 0x8F, 0xB0, 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
 511                 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C, 0x6A, 0x42, 0xB7, 0x3B,
 512                 0xBE, 0xAC, 0x01, 0xFA
 513         };
 514
 515         if (dev->device.numa_node == SOCKET_ID_ANY)
 516                 dev->device.numa_node = rte_socket_id();
 517
 518         PMD_LOG(INFO, "Creating null ethdev on numa socket %u",
 519                 dev->device.numa_node);
 520
 521         eth_dev = rte_eth_vdev_allocate(dev, sizeof(*internals));
 522         if (!eth_dev)
 523                 return -ENOMEM;
 524
 525         /* now put it all together
 526          * - store queue data in internals,
 527          * - store numa_node info in ethdev data
 528          * - point eth_dev_data to internals
 529          * - and point eth_dev structure to new eth_dev_data structure
 530          */
 531         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 532          * so the nulls are local per-process */
 533
 534         internals = eth_dev->data->dev_private;
 535         internals->packet_size = packet_size;
 536         internals->packet_copy = packet_copy;
 537         internals->port_id = eth_dev->data->port_id;
 538         eth_random_addr(internals->eth_addr.addr_bytes);
 539
 540         internals->flow_type_rss_offloads =  ETH_RSS_PROTO_MASK;
 541         internals->reta_size = RTE_DIM(internals->reta_conf) * RTE_RETA_GROUP_SIZE;
 542
 543         rte_memcpy(internals->rss_key, default_rss_key, 40);
 544
 545         data = eth_dev->data;
 546         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 547         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 548         data->dev_link = pmd_link;
 549         data->mac_addrs = &internals->eth_addr;
 550
 551         eth_dev->dev_ops = &ops;
 552
 553         /* finally assign rx and tx ops */
 554         if (packet_copy) {
 555                 eth_dev->rx_pkt_burst = eth_null_copy_rx;
 556                 eth_dev->tx_pkt_burst = eth_null_copy_tx;
 557         } else {
 558                 eth_dev->rx_pkt_burst = eth_null_rx;
 559                 eth_dev->tx_pkt_burst = eth_null_tx;
 560         }
 561
 562         rte_eth_dev_probing_finish(eth_dev);
 563         return 0;
 564 }
 565
 566 static inline int
 567 get_packet_size_arg(const char *key __rte_unused,
 568                 const char *value, void *extra_args)
 569 {
 570         const char *a = value;
 571         unsigned *packet_size = extra_args;
 572
 573         if ((value == NULL) || (extra_args == NULL))
 574                 return -EINVAL;
 575
 576         *packet_size = (unsigned)strtoul(a, NULL, 0);
 577         if (*packet_size == UINT_MAX)
 578                 return -1;
 579
 580         return 0;
 581 }
 582
 583 static inline int
 584 get_packet_copy_arg(const char *key __rte_unused,
 585                 const char *value, void *extra_args)
 586 {
 587         const char *a = value;
 588         unsigned *packet_copy = extra_args;
 589
 590         if ((value == NULL) || (extra_args == NULL))
 591                 return -EINVAL;
 592
 593         *packet_copy = (unsigned)strtoul(a, NULL, 0);
 594         if (*packet_copy == UINT_MAX)
 595                 return -1;
 596
 597         return 0;
 598 }
 599
 600 static int
 601 rte_pmd_null_probe(struct rte_vdev_device *dev)
 602 {
 603         const char *name, *params;
 604         unsigned packet_size = default_packet_size;
 605         unsigned packet_copy = default_packet_copy;
 606         struct rte_kvargs *kvlist = NULL;
 607         struct rte_eth_dev *eth_dev;
 608         int ret;
 609
 610         if (!dev)
 611                 return -EINVAL;
 612
 613         name = rte_vdev_device_name(dev);
 614         params = rte_vdev_device_args(dev);
 615         PMD_LOG(INFO, "Initializing pmd_null for %s", name);
 616
 617         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
 618                 eth_dev = rte_eth_dev_attach_secondary(name);
 619                 if (!eth_dev) {
 620                         PMD_LOG(ERR, "Failed to probe %s", name);
 621                         return -1;
 622                 }
 623                 /* TODO: request info from primary to set up Rx and Tx */
 624                 eth_dev->dev_ops = &ops;
 625                 eth_dev->device = &dev->device;
 626                 rte_eth_dev_probing_finish(eth_dev);
 627                 return 0;
 628         }
 629
 630         if (params != NULL) {
 631                 kvlist = rte_kvargs_parse(params, valid_arguments);
 632                 if (kvlist == NULL)
 633                         return -1;
 634
 635                 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_SIZE_ARG) == 1) {
 636
 637                         ret = rte_kvargs_process(kvlist,
 638                                         ETH_NULL_PACKET_SIZE_ARG,
 639                                         &get_packet_size_arg, &packet_size);
 640                         if (ret < 0)
 641                                 goto free_kvlist;
 642                 }
 643
 644                 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_COPY_ARG) == 1) {
 645
 646                         ret = rte_kvargs_process(kvlist,
 647                                         ETH_NULL_PACKET_COPY_ARG,
 648                                         &get_packet_copy_arg, &packet_copy);
 649                         if (ret < 0)
 650                                 goto free_kvlist;
 651                 }
 652         }
 653
 654         PMD_LOG(INFO, "Configure pmd_null: packet size is %d, "
 655                         "packet copy is %s", packet_size,
 656                         packet_copy ? "enabled" : "disabled");
 657
 658         ret = eth_dev_null_create(dev, packet_size, packet_copy);
 659
 660 free_kvlist:
 661         if (kvlist)
 662                 rte_kvargs_free(kvlist);
 663         return ret;
 664 }
 665
 666 static int
 667 rte_pmd_null_remove(struct rte_vdev_device *dev)
 668 {
 669         struct rte_eth_dev *eth_dev = NULL;
 670
 671         if (!dev)
 672                 return -EINVAL;
 673
 674         PMD_LOG(INFO, "Closing null ethdev on numa socket %u",
 675                         rte_socket_id());
 676
 677         /* find the ethdev entry */
 678         eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
 679         if (eth_dev == NULL)
 680                 return -1;
 681
 682         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
 683                 /* mac_addrs must not be freed alone because part of dev_private */
 684                 eth_dev->data->mac_addrs = NULL;
 685
 686         rte_eth_dev_release_port(eth_dev);
 687
 688         return 0;
 689 }
 690
 691 static struct rte_vdev_driver pmd_null_drv = {
 692         .probe = rte_pmd_null_probe,
 693         .remove = rte_pmd_null_remove,
 694 };
 695
 696 RTE_PMD_REGISTER_VDEV(net_null, pmd_null_drv);
 697 RTE_PMD_REGISTER_ALIAS(net_null, eth_null);
 698 RTE_PMD_REGISTER_PARAM_STRING(net_null,
 699         "size=<int> "
 700         "copy=<int>");
 701
 702 RTE_INIT(eth_null_init_log)
 703 {
 704         eth_null_logtype = rte_log_register("pmd.net.null");
 705         if (eth_null_logtype >= 0)
 706                 rte_log_set_level(eth_null_logtype, RTE_LOG_NOTICE);
 707 }