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.h>
  36 #include <rte_malloc.h>
  37 #include <rte_memcpy.h>
  38 #include <rte_dev.h>
  39 #include <rte_kvargs.h>
  40 #include <rte_spinlock.h>
  41
  42 #include "rte_eth_null.h"
  43
  44 #define ETH_NULL_PACKET_SIZE_ARG        "size"
  45 #define ETH_NULL_PACKET_COPY_ARG        "copy"
  46
  47 static unsigned default_packet_size = 64;
  48 static unsigned default_packet_copy;
  49
  50 static const char *valid_arguments[] = {
  51         ETH_NULL_PACKET_SIZE_ARG,
  52         ETH_NULL_PACKET_COPY_ARG,
  53         NULL
  54 };
  55
  56 struct pmd_internals;
  57
  58 struct null_queue {
  59         struct pmd_internals *internals;
  60
  61         struct rte_mempool *mb_pool;
  62         struct rte_mbuf *dummy_packet;
  63
  64         rte_atomic64_t rx_pkts;
  65         rte_atomic64_t tx_pkts;
  66         rte_atomic64_t err_pkts;
  67 };
  68
  69 struct pmd_internals {
  70         unsigned packet_size;
  71         unsigned packet_copy;
  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         /** Bit mask of RSS offloads, the bit offset also means flow type */
  77         uint64_t flow_type_rss_offloads;
  78
  79         rte_spinlock_t rss_lock;
  80
  81         uint16_t reta_size;
  82         struct rte_eth_rss_reta_entry64 reta_conf[ETH_RSS_RETA_SIZE_128 /
  83                         RTE_RETA_GROUP_SIZE];
  84
  85         uint8_t rss_key[40];                /**< 40-byte hash key. */
  86 };
  87
  88
  89 static struct ether_addr eth_addr = { .addr_bytes = {0} };
  90 static const char *drivername = "Null PMD";
  91 static struct rte_eth_link pmd_link = {
  92         .link_speed = 10000,
  93         .link_duplex = ETH_LINK_FULL_DUPLEX,
  94         .link_status = 0
  95 };
  96
  97 static uint16_t
  98 eth_null_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  99 {
 100         int i;
 101         struct null_queue *h = q;
 102         unsigned packet_size;
 103
 104         if ((q == NULL) || (bufs == NULL))
 105                 return 0;
 106
 107         packet_size = h->internals->packet_size;
 108         for (i = 0; i < nb_bufs; i++) {
 109                 bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
 110                 if (!bufs[i])
 111                         break;
 112                 bufs[i]->data_len = (uint16_t)packet_size;
 113                 bufs[i]->pkt_len = packet_size;
 114                 bufs[i]->nb_segs = 1;
 115                 bufs[i]->next = NULL;
 116         }
 117
 118         rte_atomic64_add(&(h->rx_pkts), i);
 119
 120         return i;
 121 }
 122
 123 static uint16_t
 124 eth_null_copy_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 125 {
 126         int i;
 127         struct null_queue *h = q;
 128         unsigned packet_size;
 129
 130         if ((q == NULL) || (bufs == NULL))
 131                 return 0;
 132
 133         packet_size = h->internals->packet_size;
 134         for (i = 0; i < nb_bufs; i++) {
 135                 bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
 136                 if (!bufs[i])
 137                         break;
 138                 rte_memcpy(rte_pktmbuf_mtod(bufs[i], void *), h->dummy_packet,
 139                                         packet_size);
 140                 bufs[i]->data_len = (uint16_t)packet_size;
 141                 bufs[i]->pkt_len = packet_size;
 142                 bufs[i]->nb_segs = 1;
 143                 bufs[i]->next = NULL;
 144         }
 145
 146         rte_atomic64_add(&(h->rx_pkts), i);
 147
 148         return i;
 149 }
 150
 151 static uint16_t
 152 eth_null_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 153 {
 154         int i;
 155         struct null_queue *h = q;
 156
 157         if ((q == NULL) || (bufs == NULL))
 158                 return 0;
 159
 160         for (i = 0; i < nb_bufs; i++)
 161                 rte_pktmbuf_free(bufs[i]);
 162
 163         rte_atomic64_add(&(h->tx_pkts), i);
 164
 165         return i;
 166 }
 167
 168 static uint16_t
 169 eth_null_copy_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 170 {
 171         int i;
 172         struct null_queue *h = q;
 173         unsigned packet_size;
 174
 175         if ((q == NULL) || (bufs == NULL))
 176                 return 0;
 177
 178         packet_size = h->internals->packet_size;
 179         for (i = 0; i < nb_bufs; i++) {
 180                 rte_memcpy(h->dummy_packet, rte_pktmbuf_mtod(bufs[i], void *),
 181                                         packet_size);
 182                 rte_pktmbuf_free(bufs[i]);
 183         }
 184
 185         rte_atomic64_add(&(h->tx_pkts), i);
 186
 187         return i;
 188 }
 189
 190 static int
 191 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 192 {
 193         return 0;
 194 }
 195
 196 static int
 197 eth_dev_start(struct rte_eth_dev *dev)
 198 {
 199         if (dev == NULL)
 200                 return -EINVAL;
 201
 202         dev->data->dev_link.link_status = 1;
 203         return 0;
 204 }
 205
 206 static void
 207 eth_dev_stop(struct rte_eth_dev *dev)
 208 {
 209         if (dev == NULL)
 210                 return;
 211
 212         dev->data->dev_link.link_status = 0;
 213 }
 214
 215 static int
 216 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 217                 uint16_t nb_rx_desc __rte_unused,
 218                 unsigned int socket_id __rte_unused,
 219                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 220                 struct rte_mempool *mb_pool)
 221 {
 222         struct rte_mbuf *dummy_packet;
 223         struct pmd_internals *internals;
 224         unsigned packet_size;
 225
 226         if ((dev == NULL) || (mb_pool == NULL))
 227                 return -EINVAL;
 228
 229         internals = dev->data->dev_private;
 230
 231         if (rx_queue_id >= dev->data->nb_rx_queues)
 232                 return -ENODEV;
 233
 234         packet_size = internals->packet_size;
 235
 236         internals->rx_null_queues[rx_queue_id].mb_pool = mb_pool;
 237         dev->data->rx_queues[rx_queue_id] =
 238                 &internals->rx_null_queues[rx_queue_id];
 239         dummy_packet = rte_zmalloc_socket(NULL,
 240                         packet_size, 0, dev->data->numa_node);
 241         if (dummy_packet == NULL)
 242                 return -ENOMEM;
 243
 244         internals->rx_null_queues[rx_queue_id].internals = internals;
 245         internals->rx_null_queues[rx_queue_id].dummy_packet = dummy_packet;
 246
 247         return 0;
 248 }
 249
 250 static int
 251 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 252                 uint16_t nb_tx_desc __rte_unused,
 253                 unsigned int socket_id __rte_unused,
 254                 const struct rte_eth_txconf *tx_conf __rte_unused)
 255 {
 256         struct rte_mbuf *dummy_packet;
 257         struct pmd_internals *internals;
 258         unsigned packet_size;
 259
 260         if (dev == NULL)
 261                 return -EINVAL;
 262
 263         internals = dev->data->dev_private;
 264
 265         if (tx_queue_id >= dev->data->nb_tx_queues)
 266                 return -ENODEV;
 267
 268         packet_size = internals->packet_size;
 269
 270         dev->data->tx_queues[tx_queue_id] =
 271                 &internals->tx_null_queues[tx_queue_id];
 272         dummy_packet = rte_zmalloc_socket(NULL,
 273                         packet_size, 0, dev->data->numa_node);
 274         if (dummy_packet == NULL)
 275                 return -ENOMEM;
 276
 277         internals->tx_null_queues[tx_queue_id].internals = internals;
 278         internals->tx_null_queues[tx_queue_id].dummy_packet = dummy_packet;
 279
 280         return 0;
 281 }
 282
 283
 284 static void
 285 eth_dev_info(struct rte_eth_dev *dev,
 286                 struct rte_eth_dev_info *dev_info)
 287 {
 288         struct pmd_internals *internals;
 289
 290         if ((dev == NULL) || (dev_info == NULL))
 291                 return;
 292
 293         internals = dev->data->dev_private;
 294         dev_info->driver_name = drivername;
 295         dev_info->max_mac_addrs = 1;
 296         dev_info->max_rx_pktlen = (uint32_t)-1;
 297         dev_info->max_rx_queues = RTE_DIM(internals->rx_null_queues);
 298         dev_info->max_tx_queues = RTE_DIM(internals->tx_null_queues);
 299         dev_info->min_rx_bufsize = 0;
 300         dev_info->pci_dev = NULL;
 301         dev_info->reta_size = internals->reta_size;
 302         dev_info->flow_type_rss_offloads = internals->flow_type_rss_offloads;
 303 }
 304
 305 static void
 306 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 307 {
 308         unsigned i, num_stats;
 309         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 310         const struct pmd_internals *internal;
 311
 312         if ((dev == NULL) || (igb_stats == NULL))
 313                 return;
 314
 315         internal = dev->data->dev_private;
 316         num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 317                         RTE_MIN(dev->data->nb_rx_queues,
 318                                 RTE_DIM(internal->rx_null_queues)));
 319         for (i = 0; i < num_stats; i++) {
 320                 igb_stats->q_ipackets[i] =
 321                         internal->rx_null_queues[i].rx_pkts.cnt;
 322                 rx_total += igb_stats->q_ipackets[i];
 323         }
 324
 325         num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 326                         RTE_MIN(dev->data->nb_tx_queues,
 327                                 RTE_DIM(internal->tx_null_queues)));
 328         for (i = 0; i < num_stats; i++) {
 329                 igb_stats->q_opackets[i] =
 330                         internal->tx_null_queues[i].tx_pkts.cnt;
 331                 igb_stats->q_errors[i] =
 332                         internal->tx_null_queues[i].err_pkts.cnt;
 333                 tx_total += igb_stats->q_opackets[i];
 334                 tx_err_total += igb_stats->q_errors[i];
 335         }
 336
 337         igb_stats->ipackets = rx_total;
 338         igb_stats->opackets = tx_total;
 339         igb_stats->oerrors = tx_err_total;
 340 }
 341
 342 static void
 343 eth_stats_reset(struct rte_eth_dev *dev)
 344 {
 345         unsigned i;
 346         struct pmd_internals *internal;
 347
 348         if (dev == NULL)
 349                 return;
 350
 351         internal = dev->data->dev_private;
 352         for (i = 0; i < RTE_DIM(internal->rx_null_queues); i++)
 353                 internal->rx_null_queues[i].rx_pkts.cnt = 0;
 354         for (i = 0; i < RTE_DIM(internal->tx_null_queues); i++) {
 355                 internal->tx_null_queues[i].tx_pkts.cnt = 0;
 356                 internal->tx_null_queues[i].err_pkts.cnt = 0;
 357         }
 358 }
 359
 360 static void
 361 eth_queue_release(void *q)
 362 {
 363         struct null_queue *nq;
 364
 365         if (q == NULL)
 366                 return;
 367
 368         nq = q;
 369         rte_free(nq->dummy_packet);
 370 }
 371
 372 static int
 373 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 374                 int wait_to_complete __rte_unused) { return 0; }
 375
 376 static int
 377 eth_rss_reta_update(struct rte_eth_dev *dev,
 378                 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
 379 {
 380         int i, j;
 381         struct pmd_internals *internal = dev->data->dev_private;
 382
 383         if (reta_size != internal->reta_size)
 384                 return -EINVAL;
 385
 386         rte_spinlock_lock(&internal->rss_lock);
 387
 388         /* Copy RETA table */
 389         for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
 390                 internal->reta_conf[i].mask = reta_conf[i].mask;
 391                 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
 392                         if ((reta_conf[i].mask >> j) & 0x01)
 393                                 internal->reta_conf[i].reta[j] = reta_conf[i].reta[j];
 394         }
 395
 396         rte_spinlock_unlock(&internal->rss_lock);
 397
 398         return 0;
 399 }
 400
 401 static int
 402 eth_rss_reta_query(struct rte_eth_dev *dev,
 403                 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
 404 {
 405         int i, j;
 406         struct pmd_internals *internal = dev->data->dev_private;
 407
 408         if (reta_size != internal->reta_size)
 409                 return -EINVAL;
 410
 411         rte_spinlock_lock(&internal->rss_lock);
 412
 413         /* Copy RETA table */
 414         for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
 415                 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
 416                         if ((reta_conf[i].mask >> j) & 0x01)
 417                                 reta_conf[i].reta[j] = internal->reta_conf[i].reta[j];
 418         }
 419
 420         rte_spinlock_unlock(&internal->rss_lock);
 421
 422         return 0;
 423 }
 424
 425 static int
 426 eth_rss_hash_update(struct rte_eth_dev *dev, struct rte_eth_rss_conf *rss_conf)
 427 {
 428         struct pmd_internals *internal = dev->data->dev_private;
 429
 430         rte_spinlock_lock(&internal->rss_lock);
 431
 432         if ((rss_conf->rss_hf & internal->flow_type_rss_offloads) != 0)
 433                 dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf =
 434                                 rss_conf->rss_hf & internal->flow_type_rss_offloads;
 435
 436         if (rss_conf->rss_key)
 437                 rte_memcpy(internal->rss_key, rss_conf->rss_key, 40);
 438
 439         rte_spinlock_unlock(&internal->rss_lock);
 440
 441         return 0;
 442 }
 443
 444 static int
 445 eth_rss_hash_conf_get(struct rte_eth_dev *dev,
 446                 struct rte_eth_rss_conf *rss_conf)
 447 {
 448         struct pmd_internals *internal = dev->data->dev_private;
 449
 450         rte_spinlock_lock(&internal->rss_lock);
 451
 452         rss_conf->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 453         if (rss_conf->rss_key)
 454                 rte_memcpy(rss_conf->rss_key, internal->rss_key, 40);
 455
 456         rte_spinlock_unlock(&internal->rss_lock);
 457
 458         return 0;
 459 }
 460
 461 static const struct eth_dev_ops ops = {
 462         .dev_start = eth_dev_start,
 463         .dev_stop = eth_dev_stop,
 464         .dev_configure = eth_dev_configure,
 465         .dev_infos_get = eth_dev_info,
 466         .rx_queue_setup = eth_rx_queue_setup,
 467         .tx_queue_setup = eth_tx_queue_setup,
 468         .rx_queue_release = eth_queue_release,
 469         .tx_queue_release = eth_queue_release,
 470         .link_update = eth_link_update,
 471         .stats_get = eth_stats_get,
 472         .stats_reset = eth_stats_reset,
 473         .reta_update = eth_rss_reta_update,
 474         .reta_query = eth_rss_reta_query,
 475         .rss_hash_update = eth_rss_hash_update,
 476         .rss_hash_conf_get = eth_rss_hash_conf_get
 477 };
 478
 479 int
 480 eth_dev_null_create(const char *name,
 481                 const unsigned numa_node,
 482                 unsigned packet_size,
 483                 unsigned packet_copy)
 484 {
 485         const unsigned nb_rx_queues = 1;
 486         const unsigned nb_tx_queues = 1;
 487         struct rte_eth_dev_data *data = NULL;
 488         struct pmd_internals *internals = NULL;
 489         struct rte_eth_dev *eth_dev = NULL;
 490
 491         static const uint8_t default_rss_key[40] = {
 492                 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2, 0x41, 0x67, 0x25, 0x3D,
 493                 0x43, 0xA3, 0x8F, 0xB0, 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
 494                 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C, 0x6A, 0x42, 0xB7, 0x3B,
 495                 0xBE, 0xAC, 0x01, 0xFA
 496         };
 497
 498         if (name == NULL)
 499                 return -EINVAL;
 500
 501         RTE_LOG(INFO, PMD, "Creating null ethdev on numa socket %u\n",
 502                         numa_node);
 503
 504         /* now do all data allocation - for eth_dev structure, dummy pci driver
 505          * and internal (private) data
 506          */
 507         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 508         if (data == NULL)
 509                 goto error;
 510
 511         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 512         if (internals == NULL)
 513                 goto error;
 514
 515         /* reserve an ethdev entry */
 516         eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 517         if (eth_dev == NULL)
 518                 goto error;
 519
 520         /* now put it all together
 521          * - store queue data in internals,
 522          * - store numa_node info in ethdev data
 523          * - point eth_dev_data to internals
 524          * - and point eth_dev structure to new eth_dev_data structure
 525          */
 526         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 527          * so the nulls are local per-process */
 528
 529         internals->packet_size = packet_size;
 530         internals->packet_copy = packet_copy;
 531
 532         internals->flow_type_rss_offloads =  ETH_RSS_PROTO_MASK;
 533         internals->reta_size = RTE_DIM(internals->reta_conf) * RTE_RETA_GROUP_SIZE;
 534
 535         rte_memcpy(internals->rss_key, default_rss_key, 40);
 536
 537         data->dev_private = internals;
 538         data->port_id = eth_dev->data->port_id;
 539         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 540         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 541         data->dev_link = pmd_link;
 542         data->mac_addrs = &eth_addr;
 543         strncpy(data->name, eth_dev->data->name, strlen(eth_dev->data->name));
 544
 545         eth_dev->data = data;
 546         eth_dev->dev_ops = &ops;
 547
 548         TAILQ_INIT(&eth_dev->link_intr_cbs);
 549
 550         eth_dev->driver = NULL;
 551         data->dev_flags = RTE_ETH_DEV_DETACHABLE;
 552         data->kdrv = RTE_KDRV_NONE;
 553         data->drv_name = drivername;
 554         data->numa_node = numa_node;
 555
 556         /* finally assign rx and tx ops */
 557         if (packet_copy) {
 558                 eth_dev->rx_pkt_burst = eth_null_copy_rx;
 559                 eth_dev->tx_pkt_burst = eth_null_copy_tx;
 560         } else {
 561                 eth_dev->rx_pkt_burst = eth_null_rx;
 562                 eth_dev->tx_pkt_burst = eth_null_tx;
 563         }
 564
 565         return 0;
 566
 567 error:
 568         rte_free(data);
 569         rte_free(internals);
 570
 571         return -1;
 572 }
 573
 574 static inline int
 575 get_packet_size_arg(const char *key __rte_unused,
 576                 const char *value, void *extra_args)
 577 {
 578         const char *a = value;
 579         unsigned *packet_size = extra_args;
 580
 581         if ((value == NULL) || (extra_args == NULL))
 582                 return -EINVAL;
 583
 584         *packet_size = (unsigned)strtoul(a, NULL, 0);
 585         if (*packet_size == UINT_MAX)
 586                 return -1;
 587
 588         return 0;
 589 }
 590
 591 static inline int
 592 get_packet_copy_arg(const char *key __rte_unused,
 593                 const char *value, void *extra_args)
 594 {
 595         const char *a = value;
 596         unsigned *packet_copy = extra_args;
 597
 598         if ((value == NULL) || (extra_args == NULL))
 599                 return -EINVAL;
 600
 601         *packet_copy = (unsigned)strtoul(a, NULL, 0);
 602         if (*packet_copy == UINT_MAX)
 603                 return -1;
 604
 605         return 0;
 606 }
 607
 608 static int
 609 rte_pmd_null_devinit(const char *name, const char *params)
 610 {
 611         unsigned numa_node;
 612         unsigned packet_size = default_packet_size;
 613         unsigned packet_copy = default_packet_copy;
 614         struct rte_kvargs *kvlist = NULL;
 615         int ret;
 616
 617         if (name == NULL)
 618                 return -EINVAL;
 619
 620         RTE_LOG(INFO, PMD, "Initializing pmd_null for %s\n", name);
 621
 622         numa_node = rte_socket_id();
 623
 624         if (params != NULL) {
 625                 kvlist = rte_kvargs_parse(params, valid_arguments);
 626                 if (kvlist == NULL)
 627                         return -1;
 628
 629                 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_SIZE_ARG) == 1) {
 630
 631                         ret = rte_kvargs_process(kvlist,
 632                                         ETH_NULL_PACKET_SIZE_ARG,
 633                                         &get_packet_size_arg, &packet_size);
 634                         if (ret < 0)
 635                                 goto free_kvlist;
 636                 }
 637
 638                 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_COPY_ARG) == 1) {
 639
 640                         ret = rte_kvargs_process(kvlist,
 641                                         ETH_NULL_PACKET_COPY_ARG,
 642                                         &get_packet_copy_arg, &packet_copy);
 643                         if (ret < 0)
 644                                 goto free_kvlist;
 645                 }
 646         }
 647
 648         RTE_LOG(INFO, PMD, "Configure pmd_null: packet size is %d, "
 649                         "packet copy is %s\n", packet_size,
 650                         packet_copy ? "enabled" : "disabled");
 651
 652         ret = eth_dev_null_create(name, numa_node, packet_size, packet_copy);
 653
 654 free_kvlist:
 655         if (kvlist)
 656                 rte_kvargs_free(kvlist);
 657         return ret;
 658 }
 659
 660 static int
 661 rte_pmd_null_devuninit(const char *name)
 662 {
 663         struct rte_eth_dev *eth_dev = NULL;
 664
 665         if (name == NULL)
 666                 return -EINVAL;
 667
 668         RTE_LOG(INFO, PMD, "Closing null ethdev on numa socket %u\n",
 669                         rte_socket_id());
 670
 671         /* find the ethdev entry */
 672         eth_dev = rte_eth_dev_allocated(name);
 673         if (eth_dev == NULL)
 674                 return -1;
 675
 676         rte_free(eth_dev->data->dev_private);
 677         rte_free(eth_dev->data);
 678
 679         rte_eth_dev_release_port(eth_dev);
 680
 681         return 0;
 682 }
 683
 684 static struct rte_driver pmd_null_drv = {
 685         .name = "eth_null",
 686         .type = PMD_VDEV,
 687         .init = rte_pmd_null_devinit,
 688         .uninit = rte_pmd_null_devuninit,
 689 };
 690
 691 PMD_REGISTER_DRIVER(pmd_null_drv);