1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (C) IGEL Co.,Ltd. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 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_vdev.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 uint8_t port_id; 73 74 struct null_queue rx_null_queues[RTE_MAX_QUEUES_PER_PORT]; 75 struct null_queue tx_null_queues[RTE_MAX_QUEUES_PER_PORT]; 76 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 89 90 static struct ether_addr eth_addr = { .addr_bytes = {0} }; 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]->port = h->internals->port_id; 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 bufs[i]->port = h->internals->port_id; 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->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->reta_size = internals->reta_size; 301 dev_info->flow_type_rss_offloads = internals->flow_type_rss_offloads; 302 } 303 304 static void 305 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats) 306 { 307 unsigned i, num_stats; 308 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0; 309 const struct pmd_internals *internal; 310 311 if ((dev == NULL) || (igb_stats == NULL)) 312 return; 313 314 internal = dev->data->dev_private; 315 num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS, 316 RTE_MIN(dev->data->nb_rx_queues, 317 RTE_DIM(internal->rx_null_queues))); 318 for (i = 0; i < num_stats; i++) { 319 igb_stats->q_ipackets[i] = 320 internal->rx_null_queues[i].rx_pkts.cnt; 321 rx_total += igb_stats->q_ipackets[i]; 322 } 323 324 num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS, 325 RTE_MIN(dev->data->nb_tx_queues, 326 RTE_DIM(internal->tx_null_queues))); 327 for (i = 0; i < num_stats; i++) { 328 igb_stats->q_opackets[i] = 329 internal->tx_null_queues[i].tx_pkts.cnt; 330 igb_stats->q_errors[i] = 331 internal->tx_null_queues[i].err_pkts.cnt; 332 tx_total += igb_stats->q_opackets[i]; 333 tx_err_total += igb_stats->q_errors[i]; 334 } 335 336 igb_stats->ipackets = rx_total; 337 igb_stats->opackets = tx_total; 338 igb_stats->oerrors = tx_err_total; 339 } 340 341 static void 342 eth_stats_reset(struct rte_eth_dev *dev) 343 { 344 unsigned i; 345 struct pmd_internals *internal; 346 347 if (dev == NULL) 348 return; 349 350 internal = dev->data->dev_private; 351 for (i = 0; i < RTE_DIM(internal->rx_null_queues); i++) 352 internal->rx_null_queues[i].rx_pkts.cnt = 0; 353 for (i = 0; i < RTE_DIM(internal->tx_null_queues); i++) { 354 internal->tx_null_queues[i].tx_pkts.cnt = 0; 355 internal->tx_null_queues[i].err_pkts.cnt = 0; 356 } 357 } 358 359 static void 360 eth_queue_release(void *q) 361 { 362 struct null_queue *nq; 363 364 if (q == NULL) 365 return; 366 367 nq = q; 368 rte_free(nq->dummy_packet); 369 } 370 371 static int 372 eth_link_update(struct rte_eth_dev *dev __rte_unused, 373 int wait_to_complete __rte_unused) { return 0; } 374 375 static int 376 eth_rss_reta_update(struct rte_eth_dev *dev, 377 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size) 378 { 379 int i, j; 380 struct pmd_internals *internal = dev->data->dev_private; 381 382 if (reta_size != internal->reta_size) 383 return -EINVAL; 384 385 rte_spinlock_lock(&internal->rss_lock); 386 387 /* Copy RETA table */ 388 for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) { 389 internal->reta_conf[i].mask = reta_conf[i].mask; 390 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++) 391 if ((reta_conf[i].mask >> j) & 0x01) 392 internal->reta_conf[i].reta[j] = reta_conf[i].reta[j]; 393 } 394 395 rte_spinlock_unlock(&internal->rss_lock); 396 397 return 0; 398 } 399 400 static int 401 eth_rss_reta_query(struct rte_eth_dev *dev, 402 struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size) 403 { 404 int i, j; 405 struct pmd_internals *internal = dev->data->dev_private; 406 407 if (reta_size != internal->reta_size) 408 return -EINVAL; 409 410 rte_spinlock_lock(&internal->rss_lock); 411 412 /* Copy RETA table */ 413 for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) { 414 for (j = 0; j < RTE_RETA_GROUP_SIZE; j++) 415 if ((reta_conf[i].mask >> j) & 0x01) 416 reta_conf[i].reta[j] = internal->reta_conf[i].reta[j]; 417 } 418 419 rte_spinlock_unlock(&internal->rss_lock); 420 421 return 0; 422 } 423 424 static int 425 eth_rss_hash_update(struct rte_eth_dev *dev, struct rte_eth_rss_conf *rss_conf) 426 { 427 struct pmd_internals *internal = dev->data->dev_private; 428 429 rte_spinlock_lock(&internal->rss_lock); 430 431 if ((rss_conf->rss_hf & internal->flow_type_rss_offloads) != 0) 432 dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf = 433 rss_conf->rss_hf & internal->flow_type_rss_offloads; 434 435 if (rss_conf->rss_key) 436 rte_memcpy(internal->rss_key, rss_conf->rss_key, 40); 437 438 rte_spinlock_unlock(&internal->rss_lock); 439 440 return 0; 441 } 442 443 static int 444 eth_rss_hash_conf_get(struct rte_eth_dev *dev, 445 struct rte_eth_rss_conf *rss_conf) 446 { 447 struct pmd_internals *internal = dev->data->dev_private; 448 449 rte_spinlock_lock(&internal->rss_lock); 450 451 rss_conf->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf; 452 if (rss_conf->rss_key) 453 rte_memcpy(rss_conf->rss_key, internal->rss_key, 40); 454 455 rte_spinlock_unlock(&internal->rss_lock); 456 457 return 0; 458 } 459 460 static const struct eth_dev_ops ops = { 461 .dev_start = eth_dev_start, 462 .dev_stop = eth_dev_stop, 463 .dev_configure = eth_dev_configure, 464 .dev_infos_get = eth_dev_info, 465 .rx_queue_setup = eth_rx_queue_setup, 466 .tx_queue_setup = eth_tx_queue_setup, 467 .rx_queue_release = eth_queue_release, 468 .tx_queue_release = eth_queue_release, 469 .link_update = eth_link_update, 470 .stats_get = eth_stats_get, 471 .stats_reset = eth_stats_reset, 472 .reta_update = eth_rss_reta_update, 473 .reta_query = eth_rss_reta_query, 474 .rss_hash_update = eth_rss_hash_update, 475 .rss_hash_conf_get = eth_rss_hash_conf_get 476 }; 477 478 static struct rte_vdev_driver pmd_null_drv; 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); 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 internals->port_id = eth_dev->data->port_id; 533 534 internals->flow_type_rss_offloads = ETH_RSS_PROTO_MASK; 535 internals->reta_size = RTE_DIM(internals->reta_conf) * RTE_RETA_GROUP_SIZE; 536 537 rte_memcpy(internals->rss_key, default_rss_key, 40); 538 539 data->dev_private = internals; 540 data->port_id = eth_dev->data->port_id; 541 data->nb_rx_queues = (uint16_t)nb_rx_queues; 542 data->nb_tx_queues = (uint16_t)nb_tx_queues; 543 data->dev_link = pmd_link; 544 data->mac_addrs = ð_addr; 545 strncpy(data->name, eth_dev->data->name, strlen(eth_dev->data->name)); 546 547 eth_dev->data = data; 548 eth_dev->dev_ops = &ops; 549 550 eth_dev->driver = NULL; 551 data->dev_flags = RTE_ETH_DEV_DETACHABLE; 552 data->kdrv = RTE_KDRV_NONE; 553 data->drv_name = pmd_null_drv.driver.name; 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_probe(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_remove(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_vdev_driver pmd_null_drv = { 685 .probe = rte_pmd_null_probe, 686 .remove = rte_pmd_null_remove, 687 }; 688 689 RTE_PMD_REGISTER_VDEV(net_null, pmd_null_drv); 690 RTE_PMD_REGISTER_ALIAS(net_null, eth_null); 691 RTE_PMD_REGISTER_PARAM_STRING(net_null, 692 "size=<int> " 693 "copy=<int>"); 694