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 = ETH_SPEED_NUM_10G,
  93         .link_duplex = ETH_LINK_FULL_DUPLEX,
  94         .link_status = ETH_LINK_DOWN,
  95         .link_autoneg = ETH_LINK_SPEED_AUTONEG,
  96 };
  97
  98 static uint16_t
  99 eth_null_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 100 {
 101         int i;
 102         struct null_queue *h = q;
 103         unsigned packet_size;
 104
 105         if ((q == NULL) || (bufs == NULL))
 106                 return 0;
 107
 108         packet_size = h->internals->packet_size;
 109         for (i = 0; i < nb_bufs; i++) {
 110                 bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
 111                 if (!bufs[i])
 112                         break;
 113                 bufs[i]->data_len = (uint16_t)packet_size;
 114                 bufs[i]->pkt_len = packet_size;
 115                 bufs[i]->nb_segs = 1;
 116                 bufs[i]->next = NULL;
 117         }
 118
 119         rte_atomic64_add(&(h->rx_pkts), i);
 120
 121         return i;
 122 }
 123
 124 static uint16_t
 125 eth_null_copy_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 126 {
 127         int i;
 128         struct null_queue *h = q;
 129         unsigned packet_size;
 130
 131         if ((q == NULL) || (bufs == NULL))
 132                 return 0;
 133
 134         packet_size = h->internals->packet_size;
 135         for (i = 0; i < nb_bufs; i++) {
 136                 bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
 137                 if (!bufs[i])
 138                         break;
 139                 rte_memcpy(rte_pktmbuf_mtod(bufs[i], void *), h->dummy_packet,
 140                                         packet_size);
 141                 bufs[i]->data_len = (uint16_t)packet_size;
 142                 bufs[i]->pkt_len = packet_size;
 143                 bufs[i]->nb_segs = 1;
 144                 bufs[i]->next = NULL;
 145         }
 146
 147         rte_atomic64_add(&(h->rx_pkts), i);
 148
 149         return i;
 150 }
 151
 152 static uint16_t
 153 eth_null_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 154 {
 155         int i;
 156         struct null_queue *h = q;
 157
 158         if ((q == NULL) || (bufs == NULL))
 159                 return 0;
 160
 161         for (i = 0; i < nb_bufs; i++)
 162                 rte_pktmbuf_free(bufs[i]);
 163
 164         rte_atomic64_add(&(h->tx_pkts), i);
 165
 166         return i;
 167 }
 168
 169 static uint16_t
 170 eth_null_copy_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 171 {
 172         int i;
 173         struct null_queue *h = q;
 174         unsigned packet_size;
 175
 176         if ((q == NULL) || (bufs == NULL))
 177                 return 0;
 178
 179         packet_size = h->internals->packet_size;
 180         for (i = 0; i < nb_bufs; i++) {
 181                 rte_memcpy(h->dummy_packet, rte_pktmbuf_mtod(bufs[i], void *),
 182                                         packet_size);
 183                 rte_pktmbuf_free(bufs[i]);
 184         }
 185
 186         rte_atomic64_add(&(h->tx_pkts), i);
 187
 188         return i;
 189 }
 190
 191 static int
 192 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 193 {
 194         return 0;
 195 }
 196
 197 static int
 198 eth_dev_start(struct rte_eth_dev *dev)
 199 {
 200         if (dev == NULL)
 201                 return -EINVAL;
 202
 203         dev->data->dev_link.link_status = ETH_LINK_UP;
 204         return 0;
 205 }
 206
 207 static void
 208 eth_dev_stop(struct rte_eth_dev *dev)
 209 {
 210         if (dev == NULL)
 211                 return;
 212
 213         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 214 }
 215
 216 static int
 217 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 218                 uint16_t nb_rx_desc __rte_unused,
 219                 unsigned int socket_id __rte_unused,
 220                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 221                 struct rte_mempool *mb_pool)
 222 {
 223         struct rte_mbuf *dummy_packet;
 224         struct pmd_internals *internals;
 225         unsigned packet_size;
 226
 227         if ((dev == NULL) || (mb_pool == NULL))
 228                 return -EINVAL;
 229
 230         internals = dev->data->dev_private;
 231
 232         if (rx_queue_id >= dev->data->nb_rx_queues)
 233                 return -ENODEV;
 234
 235         packet_size = internals->packet_size;
 236
 237         internals->rx_null_queues[rx_queue_id].mb_pool = mb_pool;
 238         dev->data->rx_queues[rx_queue_id] =
 239                 &internals->rx_null_queues[rx_queue_id];
 240         dummy_packet = rte_zmalloc_socket(NULL,
 241                         packet_size, 0, dev->data->numa_node);
 242         if (dummy_packet == NULL)
 243                 return -ENOMEM;
 244
 245         internals->rx_null_queues[rx_queue_id].internals = internals;
 246         internals->rx_null_queues[rx_queue_id].dummy_packet = dummy_packet;
 247
 248         return 0;
 249 }
 250
 251 static int
 252 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 253                 uint16_t nb_tx_desc __rte_unused,
 254                 unsigned int socket_id __rte_unused,
 255                 const struct rte_eth_txconf *tx_conf __rte_unused)
 256 {
 257         struct rte_mbuf *dummy_packet;
 258         struct pmd_internals *internals;
 259         unsigned packet_size;
 260
 261         if (dev == NULL)
 262                 return -EINVAL;
 263
 264         internals = dev->data->dev_private;
 265
 266         if (tx_queue_id >= dev->data->nb_tx_queues)
 267                 return -ENODEV;
 268
 269         packet_size = internals->packet_size;
 270
 271         dev->data->tx_queues[tx_queue_id] =
 272                 &internals->tx_null_queues[tx_queue_id];
 273         dummy_packet = rte_zmalloc_socket(NULL,
 274                         packet_size, 0, dev->data->numa_node);
 275         if (dummy_packet == NULL)
 276                 return -ENOMEM;
 277
 278         internals->tx_null_queues[tx_queue_id].internals = internals;
 279         internals->tx_null_queues[tx_queue_id].dummy_packet = dummy_packet;
 280
 281         return 0;
 282 }
 283
 284
 285 static void
 286 eth_dev_info(struct rte_eth_dev *dev,
 287                 struct rte_eth_dev_info *dev_info)
 288 {
 289         struct pmd_internals *internals;
 290
 291         if ((dev == NULL) || (dev_info == NULL))
 292                 return;
 293
 294         internals = dev->data->dev_private;
 295         dev_info->driver_name = drivername;
 296         dev_info->max_mac_addrs = 1;
 297         dev_info->max_rx_pktlen = (uint32_t)-1;
 298         dev_info->max_rx_queues = RTE_DIM(internals->rx_null_queues);
 299         dev_info->max_tx_queues = RTE_DIM(internals->tx_null_queues);
 300         dev_info->min_rx_bufsize = 0;
 301         dev_info->pci_dev = NULL;
 302         dev_info->reta_size = internals->reta_size;
 303         dev_info->flow_type_rss_offloads = internals->flow_type_rss_offloads;
 304 }
 305
 306 static void
 307 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 308 {
 309         unsigned i, num_stats;
 310         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 311         const struct pmd_internals *internal;
 312
 313         if ((dev == NULL) || (igb_stats == NULL))
 314                 return;
 315
 316         internal = dev->data->dev_private;
 317         num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 318                         RTE_MIN(dev->data->nb_rx_queues,
 319                                 RTE_DIM(internal->rx_null_queues)));
 320         for (i = 0; i < num_stats; i++) {
 321                 igb_stats->q_ipackets[i] =
 322                         internal->rx_null_queues[i].rx_pkts.cnt;
 323                 rx_total += igb_stats->q_ipackets[i];
 324         }
 325
 326         num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 327                         RTE_MIN(dev->data->nb_tx_queues,
 328                                 RTE_DIM(internal->tx_null_queues)));
 329         for (i = 0; i < num_stats; i++) {
 330                 igb_stats->q_opackets[i] =
 331                         internal->tx_null_queues[i].tx_pkts.cnt;
 332                 igb_stats->q_errors[i] =
 333                         internal->tx_null_queues[i].err_pkts.cnt;
 334                 tx_total += igb_stats->q_opackets[i];
 335                 tx_err_total += igb_stats->q_errors[i];
 336         }
 337
 338         igb_stats->ipackets = rx_total;
 339         igb_stats->opackets = tx_total;
 340         igb_stats->oerrors = tx_err_total;
 341 }
 342
 343 static void
 344 eth_stats_reset(struct rte_eth_dev *dev)
 345 {
 346         unsigned i;
 347         struct pmd_internals *internal;
 348
 349         if (dev == NULL)
 350                 return;
 351
 352         internal = dev->data->dev_private;
 353         for (i = 0; i < RTE_DIM(internal->rx_null_queues); i++)
 354                 internal->rx_null_queues[i].rx_pkts.cnt = 0;
 355         for (i = 0; i < RTE_DIM(internal->tx_null_queues); i++) {
 356                 internal->tx_null_queues[i].tx_pkts.cnt = 0;
 357                 internal->tx_null_queues[i].err_pkts.cnt = 0;
 358         }
 359 }
 360
 361 static void
 362 eth_queue_release(void *q)
 363 {
 364         struct null_queue *nq;
 365
 366         if (q == NULL)
 367                 return;
 368
 369         nq = q;
 370         rte_free(nq->dummy_packet);
 371 }
 372
 373 static int
 374 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 375                 int wait_to_complete __rte_unused) { return 0; }
 376
 377 static int
 378 eth_rss_reta_update(struct rte_eth_dev *dev,
 379                 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
 380 {
 381         int i, j;
 382         struct pmd_internals *internal = dev->data->dev_private;
 383
 384         if (reta_size != internal->reta_size)
 385                 return -EINVAL;
 386
 387         rte_spinlock_lock(&internal->rss_lock);
 388
 389         /* Copy RETA table */
 390         for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
 391                 internal->reta_conf[i].mask = reta_conf[i].mask;
 392                 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
 393                         if ((reta_conf[i].mask >> j) & 0x01)
 394                                 internal->reta_conf[i].reta[j] = reta_conf[i].reta[j];
 395         }
 396
 397         rte_spinlock_unlock(&internal->rss_lock);
 398
 399         return 0;
 400 }
 401
 402 static int
 403 eth_rss_reta_query(struct rte_eth_dev *dev,
 404                 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
 405 {
 406         int i, j;
 407         struct pmd_internals *internal = dev->data->dev_private;
 408
 409         if (reta_size != internal->reta_size)
 410                 return -EINVAL;
 411
 412         rte_spinlock_lock(&internal->rss_lock);
 413
 414         /* Copy RETA table */
 415         for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
 416                 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
 417                         if ((reta_conf[i].mask >> j) & 0x01)
 418                                 reta_conf[i].reta[j] = internal->reta_conf[i].reta[j];
 419         }
 420
 421         rte_spinlock_unlock(&internal->rss_lock);
 422
 423         return 0;
 424 }
 425
 426 static int
 427 eth_rss_hash_update(struct rte_eth_dev *dev, struct rte_eth_rss_conf *rss_conf)
 428 {
 429         struct pmd_internals *internal = dev->data->dev_private;
 430
 431         rte_spinlock_lock(&internal->rss_lock);
 432
 433         if ((rss_conf->rss_hf & internal->flow_type_rss_offloads) != 0)
 434                 dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf =
 435                                 rss_conf->rss_hf & internal->flow_type_rss_offloads;
 436
 437         if (rss_conf->rss_key)
 438                 rte_memcpy(internal->rss_key, rss_conf->rss_key, 40);
 439
 440         rte_spinlock_unlock(&internal->rss_lock);
 441
 442         return 0;
 443 }
 444
 445 static int
 446 eth_rss_hash_conf_get(struct rte_eth_dev *dev,
 447                 struct rte_eth_rss_conf *rss_conf)
 448 {
 449         struct pmd_internals *internal = dev->data->dev_private;
 450
 451         rte_spinlock_lock(&internal->rss_lock);
 452
 453         rss_conf->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 454         if (rss_conf->rss_key)
 455                 rte_memcpy(rss_conf->rss_key, internal->rss_key, 40);
 456
 457         rte_spinlock_unlock(&internal->rss_lock);
 458
 459         return 0;
 460 }
 461
 462 static const struct eth_dev_ops ops = {
 463         .dev_start = eth_dev_start,
 464         .dev_stop = eth_dev_stop,
 465         .dev_configure = eth_dev_configure,
 466         .dev_infos_get = eth_dev_info,
 467         .rx_queue_setup = eth_rx_queue_setup,
 468         .tx_queue_setup = eth_tx_queue_setup,
 469         .rx_queue_release = eth_queue_release,
 470         .tx_queue_release = eth_queue_release,
 471         .link_update = eth_link_update,
 472         .stats_get = eth_stats_get,
 473         .stats_reset = eth_stats_reset,
 474         .reta_update = eth_rss_reta_update,
 475         .reta_query = eth_rss_reta_query,
 476         .rss_hash_update = eth_rss_hash_update,
 477         .rss_hash_conf_get = eth_rss_hash_conf_get
 478 };
 479
 480 int
 481 eth_dev_null_create(const char *name,
 482                 const unsigned numa_node,
 483                 unsigned packet_size,
 484                 unsigned packet_copy)
 485 {
 486         const unsigned nb_rx_queues = 1;
 487         const unsigned nb_tx_queues = 1;
 488         struct rte_eth_dev_data *data = NULL;
 489         struct pmd_internals *internals = NULL;
 490         struct rte_eth_dev *eth_dev = NULL;
 491
 492         static const uint8_t default_rss_key[40] = {
 493                 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2, 0x41, 0x67, 0x25, 0x3D,
 494                 0x43, 0xA3, 0x8F, 0xB0, 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
 495                 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C, 0x6A, 0x42, 0xB7, 0x3B,
 496                 0xBE, 0xAC, 0x01, 0xFA
 497         };
 498
 499         if (name == NULL)
 500                 return -EINVAL;
 501
 502         RTE_LOG(INFO, PMD, "Creating null ethdev on numa socket %u\n",
 503                         numa_node);
 504
 505         /* now do all data allocation - for eth_dev structure, dummy pci driver
 506          * and internal (private) data
 507          */
 508         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 509         if (data == NULL)
 510                 goto error;
 511
 512         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 513         if (internals == NULL)
 514                 goto error;
 515
 516         /* reserve an ethdev entry */
 517         eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 518         if (eth_dev == NULL)
 519                 goto error;
 520
 521         /* now put it all together
 522          * - store queue data in internals,
 523          * - store numa_node info in ethdev data
 524          * - point eth_dev_data to internals
 525          * - and point eth_dev structure to new eth_dev_data structure
 526          */
 527         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 528          * so the nulls are local per-process */
 529
 530         internals->packet_size = packet_size;
 531         internals->packet_copy = packet_copy;
 532
 533         internals->flow_type_rss_offloads =  ETH_RSS_PROTO_MASK;
 534         internals->reta_size = RTE_DIM(internals->reta_conf) * RTE_RETA_GROUP_SIZE;
 535
 536         rte_memcpy(internals->rss_key, default_rss_key, 40);
 537
 538         data->dev_private = internals;
 539         data->port_id = eth_dev->data->port_id;
 540         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 541         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 542         data->dev_link = pmd_link;
 543         data->mac_addrs = &eth_addr;
 544         strncpy(data->name, eth_dev->data->name, strlen(eth_dev->data->name));
 545
 546         eth_dev->data = data;
 547         eth_dev->dev_ops = &ops;
 548
 549         TAILQ_INIT(&eth_dev->link_intr_cbs);
 550
 551         eth_dev->driver = NULL;
 552         data->dev_flags = RTE_ETH_DEV_DETACHABLE;
 553         data->kdrv = RTE_KDRV_NONE;
 554         data->drv_name = drivername;
 555         data->numa_node = numa_node;
 556
 557         /* finally assign rx and tx ops */
 558         if (packet_copy) {
 559                 eth_dev->rx_pkt_burst = eth_null_copy_rx;
 560                 eth_dev->tx_pkt_burst = eth_null_copy_tx;
 561         } else {
 562                 eth_dev->rx_pkt_burst = eth_null_rx;
 563                 eth_dev->tx_pkt_burst = eth_null_tx;
 564         }
 565
 566         return 0;
 567
 568 error:
 569         rte_free(data);
 570         rte_free(internals);
 571
 572         return -1;
 573 }
 574
 575 static inline int
 576 get_packet_size_arg(const char *key __rte_unused,
 577                 const char *value, void *extra_args)
 578 {
 579         const char *a = value;
 580         unsigned *packet_size = extra_args;
 581
 582         if ((value == NULL) || (extra_args == NULL))
 583                 return -EINVAL;
 584
 585         *packet_size = (unsigned)strtoul(a, NULL, 0);
 586         if (*packet_size == UINT_MAX)
 587                 return -1;
 588
 589         return 0;
 590 }
 591
 592 static inline int
 593 get_packet_copy_arg(const char *key __rte_unused,
 594                 const char *value, void *extra_args)
 595 {
 596         const char *a = value;
 597         unsigned *packet_copy = extra_args;
 598
 599         if ((value == NULL) || (extra_args == NULL))
 600                 return -EINVAL;
 601
 602         *packet_copy = (unsigned)strtoul(a, NULL, 0);
 603         if (*packet_copy == UINT_MAX)
 604                 return -1;
 605
 606         return 0;
 607 }
 608
 609 static int
 610 rte_pmd_null_devinit(const char *name, const char *params)
 611 {
 612         unsigned numa_node;
 613         unsigned packet_size = default_packet_size;
 614         unsigned packet_copy = default_packet_copy;
 615         struct rte_kvargs *kvlist = NULL;
 616         int ret;
 617
 618         if (name == NULL)
 619                 return -EINVAL;
 620
 621         RTE_LOG(INFO, PMD, "Initializing pmd_null for %s\n", name);
 622
 623         numa_node = rte_socket_id();
 624
 625         if (params != NULL) {
 626                 kvlist = rte_kvargs_parse(params, valid_arguments);
 627                 if (kvlist == NULL)
 628                         return -1;
 629
 630                 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_SIZE_ARG) == 1) {
 631
 632                         ret = rte_kvargs_process(kvlist,
 633                                         ETH_NULL_PACKET_SIZE_ARG,
 634                                         &get_packet_size_arg, &packet_size);
 635                         if (ret < 0)
 636                                 goto free_kvlist;
 637                 }
 638
 639                 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_COPY_ARG) == 1) {
 640
 641                         ret = rte_kvargs_process(kvlist,
 642                                         ETH_NULL_PACKET_COPY_ARG,
 643                                         &get_packet_copy_arg, &packet_copy);
 644                         if (ret < 0)
 645                                 goto free_kvlist;
 646                 }
 647         }
 648
 649         RTE_LOG(INFO, PMD, "Configure pmd_null: packet size is %d, "
 650                         "packet copy is %s\n", packet_size,
 651                         packet_copy ? "enabled" : "disabled");
 652
 653         ret = eth_dev_null_create(name, numa_node, packet_size, packet_copy);
 654
 655 free_kvlist:
 656         if (kvlist)
 657                 rte_kvargs_free(kvlist);
 658         return ret;
 659 }
 660
 661 static int
 662 rte_pmd_null_devuninit(const char *name)
 663 {
 664         struct rte_eth_dev *eth_dev = NULL;
 665
 666         if (name == NULL)
 667                 return -EINVAL;
 668
 669         RTE_LOG(INFO, PMD, "Closing null ethdev on numa socket %u\n",
 670                         rte_socket_id());
 671
 672         /* find the ethdev entry */
 673         eth_dev = rte_eth_dev_allocated(name);
 674         if (eth_dev == NULL)
 675                 return -1;
 676
 677         rte_free(eth_dev->data->dev_private);
 678         rte_free(eth_dev->data);
 679
 680         rte_eth_dev_release_port(eth_dev);
 681
 682         return 0;
 683 }
 684
 685 static struct rte_driver pmd_null_drv = {
 686         .name = "eth_null",
 687         .type = PMD_VDEV,
 688         .init = rte_pmd_null_devinit,
 689         .uninit = rte_pmd_null_devuninit,
 690 };
 691
 692 PMD_REGISTER_DRIVER(pmd_null_drv);