drivers/net/ring/rte_eth_ring.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
   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 Intel Corporation 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_eth_ring.h"
  35 #include <rte_mbuf.h>
  36 #include <rte_ethdev.h>
  37 #include <rte_malloc.h>
  38 #include <rte_memcpy.h>
  39 #include <rte_memzone.h>
  40 #include <rte_string_fns.h>
  41 #include <rte_vdev.h>
  42 #include <rte_kvargs.h>
  43 #include <rte_errno.h>
  44
  45 #define ETH_RING_NUMA_NODE_ACTION_ARG   "nodeaction"
  46 #define ETH_RING_ACTION_CREATE          "CREATE"
  47 #define ETH_RING_ACTION_ATTACH          "ATTACH"
  48
  49 static const char *valid_arguments[] = {
  50         ETH_RING_NUMA_NODE_ACTION_ARG,
  51         NULL
  52 };
  53
  54 enum dev_action {
  55         DEV_CREATE,
  56         DEV_ATTACH
  57 };
  58
  59 struct ring_queue {
  60         struct rte_ring *rng;
  61         rte_atomic64_t rx_pkts;
  62         rte_atomic64_t tx_pkts;
  63         rte_atomic64_t err_pkts;
  64 };
  65
  66 struct pmd_internals {
  67         unsigned max_rx_queues;
  68         unsigned max_tx_queues;
  69
  70         struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
  71         struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
  72
  73         struct ether_addr address;
  74         enum dev_action action;
  75 };
  76
  77
  78 static const char *drivername = "Rings PMD";
  79 static struct rte_eth_link pmd_link = {
  80                 .link_speed = ETH_SPEED_NUM_10G,
  81                 .link_duplex = ETH_LINK_FULL_DUPLEX,
  82                 .link_status = ETH_LINK_DOWN,
  83                 .link_autoneg = ETH_LINK_SPEED_AUTONEG
  84 };
  85
  86 static uint16_t
  87 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  88 {
  89         void **ptrs = (void *)&bufs[0];
  90         struct ring_queue *r = q;
  91         const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
  92                         ptrs, nb_bufs);
  93         if (r->rng->flags & RING_F_SC_DEQ)
  94                 r->rx_pkts.cnt += nb_rx;
  95         else
  96                 rte_atomic64_add(&(r->rx_pkts), nb_rx);
  97         return nb_rx;
  98 }
  99
 100 static uint16_t
 101 eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 102 {
 103         void **ptrs = (void *)&bufs[0];
 104         struct ring_queue *r = q;
 105         const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
 106                         ptrs, nb_bufs);
 107         if (r->rng->flags & RING_F_SP_ENQ) {
 108                 r->tx_pkts.cnt += nb_tx;
 109                 r->err_pkts.cnt += nb_bufs - nb_tx;
 110         } else {
 111                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
 112                 rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
 113         }
 114         return nb_tx;
 115 }
 116
 117 static int
 118 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
 119
 120 static int
 121 eth_dev_start(struct rte_eth_dev *dev)
 122 {
 123         dev->data->dev_link.link_status = ETH_LINK_UP;
 124         return 0;
 125 }
 126
 127 static void
 128 eth_dev_stop(struct rte_eth_dev *dev)
 129 {
 130         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 131 }
 132
 133 static int
 134 eth_dev_set_link_down(struct rte_eth_dev *dev)
 135 {
 136         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 137         return 0;
 138 }
 139
 140 static int
 141 eth_dev_set_link_up(struct rte_eth_dev *dev)
 142 {
 143         dev->data->dev_link.link_status = ETH_LINK_UP;
 144         return 0;
 145 }
 146
 147 static int
 148 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 149                                     uint16_t nb_rx_desc __rte_unused,
 150                                     unsigned int socket_id __rte_unused,
 151                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
 152                                     struct rte_mempool *mb_pool __rte_unused)
 153 {
 154         struct pmd_internals *internals = dev->data->dev_private;
 155         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
 156         return 0;
 157 }
 158
 159 static int
 160 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 161                                     uint16_t nb_tx_desc __rte_unused,
 162                                     unsigned int socket_id __rte_unused,
 163                                     const struct rte_eth_txconf *tx_conf __rte_unused)
 164 {
 165         struct pmd_internals *internals = dev->data->dev_private;
 166         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
 167         return 0;
 168 }
 169
 170
 171 static void
 172 eth_dev_info(struct rte_eth_dev *dev,
 173                 struct rte_eth_dev_info *dev_info)
 174 {
 175         struct pmd_internals *internals = dev->data->dev_private;
 176         dev_info->driver_name = drivername;
 177         dev_info->max_mac_addrs = 1;
 178         dev_info->max_rx_pktlen = (uint32_t)-1;
 179         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
 180         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
 181         dev_info->min_rx_bufsize = 0;
 182         dev_info->pci_dev = NULL;
 183 }
 184
 185 static void
 186 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 187 {
 188         unsigned i;
 189         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 190         const struct pmd_internals *internal = dev->data->dev_private;
 191
 192         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 193                         i < dev->data->nb_rx_queues; i++) {
 194                 stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
 195                 rx_total += stats->q_ipackets[i];
 196         }
 197
 198         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 199                         i < dev->data->nb_tx_queues; i++) {
 200                 stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
 201                 stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
 202                 tx_total += stats->q_opackets[i];
 203                 tx_err_total += stats->q_errors[i];
 204         }
 205
 206         stats->ipackets = rx_total;
 207         stats->opackets = tx_total;
 208         stats->oerrors = tx_err_total;
 209 }
 210
 211 static void
 212 eth_stats_reset(struct rte_eth_dev *dev)
 213 {
 214         unsigned i;
 215         struct pmd_internals *internal = dev->data->dev_private;
 216         for (i = 0; i < dev->data->nb_rx_queues; i++)
 217                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 218         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 219                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 220                 internal->tx_ring_queues[i].err_pkts.cnt = 0;
 221         }
 222 }
 223
 224 static void
 225 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 226         uint32_t index __rte_unused)
 227 {
 228 }
 229
 230 static void
 231 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 232         struct ether_addr *mac_addr __rte_unused,
 233         uint32_t index __rte_unused,
 234         uint32_t vmdq __rte_unused)
 235 {
 236 }
 237
 238 static void
 239 eth_queue_release(void *q __rte_unused) { ; }
 240 static int
 241 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 242                 int wait_to_complete __rte_unused) { return 0; }
 243
 244 static const struct eth_dev_ops ops = {
 245         .dev_start = eth_dev_start,
 246         .dev_stop = eth_dev_stop,
 247         .dev_set_link_up = eth_dev_set_link_up,
 248         .dev_set_link_down = eth_dev_set_link_down,
 249         .dev_configure = eth_dev_configure,
 250         .dev_infos_get = eth_dev_info,
 251         .rx_queue_setup = eth_rx_queue_setup,
 252         .tx_queue_setup = eth_tx_queue_setup,
 253         .rx_queue_release = eth_queue_release,
 254         .tx_queue_release = eth_queue_release,
 255         .link_update = eth_link_update,
 256         .stats_get = eth_stats_get,
 257         .stats_reset = eth_stats_reset,
 258         .mac_addr_remove = eth_mac_addr_remove,
 259         .mac_addr_add = eth_mac_addr_add,
 260 };
 261
 262 static int
 263 do_eth_dev_ring_create(const char *name,
 264                 struct rte_ring * const rx_queues[], const unsigned nb_rx_queues,
 265                 struct rte_ring *const tx_queues[], const unsigned nb_tx_queues,
 266                 const unsigned numa_node, enum dev_action action)
 267 {
 268         struct rte_eth_dev_data *data = NULL;
 269         struct pmd_internals *internals = NULL;
 270         struct rte_eth_dev *eth_dev = NULL;
 271         unsigned i;
 272
 273         RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
 274                         numa_node);
 275
 276         /* now do all data allocation - for eth_dev structure, dummy pci driver
 277          * and internal (private) data
 278          */
 279         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 280         if (data == NULL) {
 281                 rte_errno = ENOMEM;
 282                 goto error;
 283         }
 284
 285         data->rx_queues = rte_zmalloc_socket(name,
 286                         sizeof(void *) * nb_rx_queues, 0, numa_node);
 287         if (data->rx_queues == NULL) {
 288                 rte_errno = ENOMEM;
 289                 goto error;
 290         }
 291
 292         data->tx_queues = rte_zmalloc_socket(name,
 293                         sizeof(void *) * nb_tx_queues, 0, numa_node);
 294         if (data->tx_queues == NULL) {
 295                 rte_errno = ENOMEM;
 296                 goto error;
 297         }
 298
 299         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 300         if (internals == NULL) {
 301                 rte_errno = ENOMEM;
 302                 goto error;
 303         }
 304
 305         /* reserve an ethdev entry */
 306         eth_dev = rte_eth_dev_allocate(name);
 307         if (eth_dev == NULL) {
 308                 rte_errno = ENOSPC;
 309                 goto error;
 310         }
 311
 312         /* now put it all together
 313          * - store queue data in internals,
 314          * - store numa_node info in eth_dev_data
 315          * - point eth_dev_data to internals
 316          * - and point eth_dev structure to new eth_dev_data structure
 317          */
 318         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 319          * so the rings are local per-process */
 320
 321         internals->action = action;
 322         internals->max_rx_queues = nb_rx_queues;
 323         internals->max_tx_queues = nb_tx_queues;
 324         for (i = 0; i < nb_rx_queues; i++) {
 325                 internals->rx_ring_queues[i].rng = rx_queues[i];
 326                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 327         }
 328         for (i = 0; i < nb_tx_queues; i++) {
 329                 internals->tx_ring_queues[i].rng = tx_queues[i];
 330                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 331         }
 332
 333         data->dev_private = internals;
 334         data->port_id = eth_dev->data->port_id;
 335         memmove(data->name, eth_dev->data->name, sizeof(data->name));
 336         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 337         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 338         data->dev_link = pmd_link;
 339         data->mac_addrs = &internals->address;
 340
 341         eth_dev->data = data;
 342         eth_dev->driver = NULL;
 343         eth_dev->dev_ops = &ops;
 344         data->dev_flags = RTE_ETH_DEV_DETACHABLE;
 345         data->kdrv = RTE_KDRV_NONE;
 346         data->drv_name = drivername;
 347         data->numa_node = numa_node;
 348
 349         /* finally assign rx and tx ops */
 350         eth_dev->rx_pkt_burst = eth_ring_rx;
 351         eth_dev->tx_pkt_burst = eth_ring_tx;
 352
 353         return data->port_id;
 354
 355 error:
 356         if (data) {
 357                 rte_free(data->rx_queues);
 358                 rte_free(data->tx_queues);
 359         }
 360         rte_free(data);
 361         rte_free(internals);
 362
 363         return -1;
 364 }
 365
 366 int
 367 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 368                 const unsigned nb_rx_queues,
 369                 struct rte_ring *const tx_queues[],
 370                 const unsigned nb_tx_queues,
 371                 const unsigned numa_node)
 372 {
 373         /* do some parameter checking */
 374         if (rx_queues == NULL && nb_rx_queues > 0) {
 375                 rte_errno = EINVAL;
 376                 return -1;
 377         }
 378         if (tx_queues == NULL && nb_tx_queues > 0) {
 379                 rte_errno = EINVAL;
 380                 return -1;
 381         }
 382         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 383                 rte_errno = EINVAL;
 384                 return -1;
 385         }
 386
 387         return do_eth_dev_ring_create(name, rx_queues, nb_rx_queues,
 388                         tx_queues, nb_tx_queues, numa_node, DEV_ATTACH);
 389 }
 390
 391 int
 392 rte_eth_from_ring(struct rte_ring *r)
 393 {
 394         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 395                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 396 }
 397
 398 static int
 399 eth_dev_ring_create(const char *name, const unsigned numa_node,
 400                 enum dev_action action)
 401 {
 402         /* rx and tx are so-called from point of view of first port.
 403          * They are inverted from the point of view of second port
 404          */
 405         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 406         unsigned i;
 407         char rng_name[RTE_RING_NAMESIZE];
 408         unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 409                         RTE_PMD_RING_MAX_TX_RINGS);
 410
 411         for (i = 0; i < num_rings; i++) {
 412                 snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
 413                 rxtx[i] = (action == DEV_CREATE) ?
 414                                 rte_ring_create(rng_name, 1024, numa_node,
 415                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 416                                 rte_ring_lookup(rng_name);
 417                 if (rxtx[i] == NULL)
 418                         return -1;
 419         }
 420
 421         if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
 422                 numa_node, action) < 0)
 423                 return -1;
 424
 425         return 0;
 426 }
 427
 428 struct node_action_pair {
 429         char name[PATH_MAX];
 430         unsigned node;
 431         enum dev_action action;
 432 };
 433
 434 struct node_action_list {
 435         unsigned total;
 436         unsigned count;
 437         struct node_action_pair *list;
 438 };
 439
 440 static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
 441 {
 442         struct node_action_list *info = data;
 443         int ret;
 444         char *name;
 445         char *action;
 446         char *node;
 447         char *end;
 448
 449         name = strdup(value);
 450
 451         ret = -EINVAL;
 452
 453         if (!name) {
 454                 RTE_LOG(WARNING, PMD, "command line paramter is empty for ring pmd!\n");
 455                 goto out;
 456         }
 457
 458         node = strchr(name, ':');
 459         if (!node) {
 460                 RTE_LOG(WARNING, PMD, "could not parse node value from %s", name);
 461                 goto out;
 462         }
 463
 464         *node = '\0';
 465         node++;
 466
 467         action = strchr(node, ':');
 468         if (!action) {
 469                 RTE_LOG(WARNING, PMD, "could not action value from %s", node);
 470                 goto out;
 471         }
 472
 473         *action = '\0';
 474         action++;
 475
 476         /*
 477          * Need to do some sanity checking here
 478          */
 479
 480         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 481                 info->list[info->count].action = DEV_ATTACH;
 482         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 483                 info->list[info->count].action = DEV_CREATE;
 484         else
 485                 goto out;
 486
 487         errno = 0;
 488         info->list[info->count].node = strtol(node, &end, 10);
 489
 490         if ((errno != 0) || (*end != '\0')) {
 491                 RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
 492                 goto out;
 493         }
 494
 495         snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);
 496
 497         info->count++;
 498
 499         ret = 0;
 500 out:
 501         free(name);
 502         return ret;
 503 }
 504
 505 static int
 506 rte_pmd_ring_probe(const char *name, const char *params)
 507 {
 508         struct rte_kvargs *kvlist = NULL;
 509         int ret = 0;
 510         struct node_action_list *info = NULL;
 511
 512         RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
 513
 514         if (params == NULL || params[0] == '\0') {
 515                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
 516                 if (ret == -1) {
 517                         RTE_LOG(INFO, PMD,
 518                                 "Attach to pmd_ring for %s\n", name);
 519                         ret = eth_dev_ring_create(name, rte_socket_id(),
 520                                                   DEV_ATTACH);
 521                 }
 522         }
 523         else {
 524                 kvlist = rte_kvargs_parse(params, valid_arguments);
 525
 526                 if (!kvlist) {
 527                         RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
 528                                         " rings-backed ethernet device\n");
 529                         ret = eth_dev_ring_create(name, rte_socket_id(),
 530                                                   DEV_CREATE);
 531                         if (ret == -1) {
 532                                 RTE_LOG(INFO, PMD,
 533                                         "Attach to pmd_ring for %s\n",
 534                                         name);
 535                                 ret = eth_dev_ring_create(name, rte_socket_id(),
 536                                                           DEV_ATTACH);
 537                         }
 538                         return ret;
 539                 } else {
 540                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 541                         info = rte_zmalloc("struct node_action_list",
 542                                            sizeof(struct node_action_list) +
 543                                            (sizeof(struct node_action_pair) * ret),
 544                                            0);
 545                         if (!info)
 546                                 goto out_free;
 547
 548                         info->total = ret;
 549                         info->list = (struct node_action_pair*)(info + 1);
 550
 551                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 552                                                  parse_kvlist, info);
 553
 554                         if (ret < 0)
 555                                 goto out_free;
 556
 557                         for (info->count = 0; info->count < info->total; info->count++) {
 558                                 ret = eth_dev_ring_create(info->list[info->count].name,
 559                                                           info->list[info->count].node,
 560                                                           info->list[info->count].action);
 561                                 if ((ret == -1) &&
 562                                     (info->list[info->count].action == DEV_CREATE)) {
 563                                         RTE_LOG(INFO, PMD,
 564                                                 "Attach to pmd_ring for %s\n",
 565                                                 name);
 566                                         ret = eth_dev_ring_create(name,
 567                                                         info->list[info->count].node,
 568                                                         DEV_ATTACH);
 569                                 }
 570                         }
 571                 }
 572         }
 573
 574 out_free:
 575         rte_kvargs_free(kvlist);
 576         rte_free(info);
 577         return ret;
 578 }
 579
 580 static int
 581 rte_pmd_ring_remove(const char *name)
 582 {
 583         struct rte_eth_dev *eth_dev = NULL;
 584         struct pmd_internals *internals = NULL;
 585         struct ring_queue *r = NULL;
 586         uint16_t i;
 587
 588         RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
 589
 590         if (name == NULL)
 591                 return -EINVAL;
 592
 593         /* find an ethdev entry */
 594         eth_dev = rte_eth_dev_allocated(name);
 595         if (eth_dev == NULL)
 596                 return -ENODEV;
 597
 598         eth_dev_stop(eth_dev);
 599
 600         internals = eth_dev->data->dev_private;
 601         if (internals->action == DEV_CREATE) {
 602                 /*
 603                  * it is only necessary to delete the rings in rx_queues because
 604                  * they are the same used in tx_queues
 605                  */
 606                 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 607                         r = eth_dev->data->rx_queues[i];
 608                         rte_ring_free(r->rng);
 609                 }
 610         }
 611
 612         rte_free(eth_dev->data->rx_queues);
 613         rte_free(eth_dev->data->tx_queues);
 614         rte_free(eth_dev->data->dev_private);
 615
 616         rte_free(eth_dev->data);
 617
 618         rte_eth_dev_release_port(eth_dev);
 619         return 0;
 620 }
 621
 622 static struct rte_vdev_driver pmd_ring_drv = {
 623         .probe = rte_pmd_ring_probe,
 624         .remove = rte_pmd_ring_remove,
 625 };
 626
 627 RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
 628 RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
 629 RTE_PMD_REGISTER_PARAM_STRING(net_ring,
 630         ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");