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