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_dev.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 *ring_ethdev_driver_name = "Ring PMD";
  50
  51 static const char *valid_arguments[] = {
  52         ETH_RING_NUMA_NODE_ACTION_ARG,
  53         NULL
  54 };
  55
  56 struct ring_queue {
  57         struct rte_ring *rng;
  58         rte_atomic64_t rx_pkts;
  59         rte_atomic64_t tx_pkts;
  60         rte_atomic64_t err_pkts;
  61 };
  62
  63 struct pmd_internals {
  64         unsigned nb_rx_queues;
  65         unsigned nb_tx_queues;
  66
  67         struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
  68         struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
  69
  70         struct ether_addr address;
  71 };
  72
  73
  74 static const char *drivername = "Rings PMD";
  75 static struct rte_eth_link pmd_link = {
  76                 .link_speed = 10000,
  77                 .link_duplex = ETH_LINK_FULL_DUPLEX,
  78                 .link_status = 0
  79 };
  80
  81 static uint16_t
  82 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  83 {
  84         void **ptrs = (void *)&bufs[0];
  85         struct ring_queue *r = q;
  86         const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
  87                         ptrs, nb_bufs);
  88         if (r->rng->flags & RING_F_SC_DEQ)
  89                 r->rx_pkts.cnt += nb_rx;
  90         else
  91                 rte_atomic64_add(&(r->rx_pkts), nb_rx);
  92         return nb_rx;
  93 }
  94
  95 static uint16_t
  96 eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  97 {
  98         void **ptrs = (void *)&bufs[0];
  99         struct ring_queue *r = q;
 100         const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
 101                         ptrs, nb_bufs);
 102         if (r->rng->flags & RING_F_SP_ENQ) {
 103                 r->tx_pkts.cnt += nb_tx;
 104                 r->err_pkts.cnt += nb_bufs - nb_tx;
 105         } else {
 106                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
 107                 rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
 108         }
 109         return nb_tx;
 110 }
 111
 112 static int
 113 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
 114
 115 static int
 116 eth_dev_start(struct rte_eth_dev *dev)
 117 {
 118         dev->data->dev_link.link_status = 1;
 119         return 0;
 120 }
 121
 122 static void
 123 eth_dev_stop(struct rte_eth_dev *dev)
 124 {
 125         dev->data->dev_link.link_status = 0;
 126 }
 127
 128 static int
 129 eth_dev_set_link_down(struct rte_eth_dev *dev)
 130 {
 131         dev->data->dev_link.link_status = 0;
 132         return 0;
 133 }
 134
 135 static int
 136 eth_dev_set_link_up(struct rte_eth_dev *dev)
 137 {
 138         dev->data->dev_link.link_status = 1;
 139         return 0;
 140 }
 141
 142 static int
 143 eth_rx_queue_setup(struct rte_eth_dev *dev,uint16_t rx_queue_id,
 144                                     uint16_t nb_rx_desc __rte_unused,
 145                                     unsigned int socket_id __rte_unused,
 146                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
 147                                     struct rte_mempool *mb_pool __rte_unused)
 148 {
 149         struct pmd_internals *internals = dev->data->dev_private;
 150         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
 151         return 0;
 152 }
 153
 154 static int
 155 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 156                                     uint16_t nb_tx_desc __rte_unused,
 157                                     unsigned int socket_id __rte_unused,
 158                                     const struct rte_eth_txconf *tx_conf __rte_unused)
 159 {
 160         struct pmd_internals *internals = dev->data->dev_private;
 161         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
 162         return 0;
 163 }
 164
 165
 166 static void
 167 eth_dev_info(struct rte_eth_dev *dev,
 168                 struct rte_eth_dev_info *dev_info)
 169 {
 170         struct pmd_internals *internals = dev->data->dev_private;
 171         dev_info->driver_name = drivername;
 172         dev_info->max_mac_addrs = 1;
 173         dev_info->max_rx_pktlen = (uint32_t)-1;
 174         dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
 175         dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
 176         dev_info->min_rx_bufsize = 0;
 177         dev_info->pci_dev = NULL;
 178 }
 179
 180 static void
 181 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
 182 {
 183         unsigned i;
 184         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 185         const struct pmd_internals *internal = dev->data->dev_private;
 186
 187         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 188                         i < internal->nb_rx_queues; i++) {
 189                 igb_stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
 190                 rx_total += igb_stats->q_ipackets[i];
 191         }
 192
 193         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 194                         i < internal->nb_tx_queues; i++) {
 195                 igb_stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
 196                 igb_stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
 197                 tx_total += igb_stats->q_opackets[i];
 198                 tx_err_total += igb_stats->q_errors[i];
 199         }
 200
 201         igb_stats->ipackets = rx_total;
 202         igb_stats->opackets = tx_total;
 203         igb_stats->oerrors = tx_err_total;
 204 }
 205
 206 static void
 207 eth_stats_reset(struct rte_eth_dev *dev)
 208 {
 209         unsigned i;
 210         struct pmd_internals *internal = dev->data->dev_private;
 211         for (i = 0; i < internal->nb_rx_queues; i++)
 212                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 213         for (i = 0; i < internal->nb_tx_queues; i++) {
 214                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 215                 internal->tx_ring_queues[i].err_pkts.cnt = 0;
 216         }
 217 }
 218
 219 static void
 220 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 221         uint32_t index __rte_unused)
 222 {
 223 }
 224
 225 static void
 226 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 227         struct ether_addr *mac_addr __rte_unused,
 228         uint32_t index __rte_unused,
 229         uint32_t vmdq __rte_unused)
 230 {
 231 }
 232
 233 static void
 234 eth_queue_release(void *q __rte_unused) { ; }
 235 static int
 236 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 237                 int wait_to_complete __rte_unused) { return 0; }
 238
 239 static const struct eth_dev_ops ops = {
 240         .dev_start = eth_dev_start,
 241         .dev_stop = eth_dev_stop,
 242         .dev_set_link_up = eth_dev_set_link_up,
 243         .dev_set_link_down = eth_dev_set_link_down,
 244         .dev_configure = eth_dev_configure,
 245         .dev_infos_get = eth_dev_info,
 246         .rx_queue_setup = eth_rx_queue_setup,
 247         .tx_queue_setup = eth_tx_queue_setup,
 248         .rx_queue_release = eth_queue_release,
 249         .tx_queue_release = eth_queue_release,
 250         .link_update = eth_link_update,
 251         .stats_get = eth_stats_get,
 252         .stats_reset = eth_stats_reset,
 253         .mac_addr_remove = eth_mac_addr_remove,
 254         .mac_addr_add = eth_mac_addr_add,
 255 };
 256
 257 static struct eth_driver rte_ring_pmd = {
 258         .pci_drv = {
 259                 .name = "rte_ring_pmd",
 260                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
 261         },
 262 };
 263
 264 static struct rte_pci_id id_table;
 265
 266 int
 267 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 268                 const unsigned nb_rx_queues,
 269                 struct rte_ring *const tx_queues[],
 270                 const unsigned nb_tx_queues,
 271                 const unsigned numa_node)
 272 {
 273         struct rte_eth_dev_data *data = NULL;
 274         struct rte_pci_device *pci_dev = NULL;
 275         struct pmd_internals *internals = NULL;
 276         struct rte_eth_dev *eth_dev = NULL;
 277
 278         unsigned i;
 279
 280         /* do some parameter checking */
 281         if (rx_queues == NULL && nb_rx_queues > 0) {
 282                 rte_errno = EINVAL;
 283                 goto error;
 284         }
 285         if (tx_queues == NULL && nb_tx_queues > 0) {
 286                 rte_errno = EINVAL;
 287                 goto error;
 288         }
 289         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 290                 rte_errno = EINVAL;
 291                 goto error;
 292         }
 293
 294         RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
 295                         numa_node);
 296
 297         /* now do all data allocation - for eth_dev structure, dummy pci driver
 298          * and internal (private) data
 299          */
 300         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 301         if (data == NULL) {
 302                 rte_errno = ENOMEM;
 303                 goto error;
 304         }
 305
 306         data->rx_queues = rte_zmalloc_socket(name, sizeof(void *) * nb_rx_queues,
 307                         0, numa_node);
 308         if (data->rx_queues == NULL) {
 309                 rte_errno = ENOMEM;
 310                 goto error;
 311         }
 312
 313         data->tx_queues = rte_zmalloc_socket(name, sizeof(void *) * nb_tx_queues,
 314                         0, numa_node);
 315         if (data->tx_queues == NULL) {
 316                 rte_errno = ENOMEM;
 317                 goto error;
 318         }
 319
 320         pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
 321         if (pci_dev == NULL) {
 322                 rte_errno = ENOMEM;
 323                 goto error;
 324         }
 325
 326         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 327         if (internals == NULL) {
 328                 rte_errno = ENOMEM;
 329                 goto error;
 330         }
 331
 332         /* reserve an ethdev entry */
 333         eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 334         if (eth_dev == NULL) {
 335                 rte_errno = ENOSPC;
 336                 goto error;
 337         }
 338
 339
 340         /* now put it all together
 341          * - store queue data in internals,
 342          * - store numa_node info in pci_driver
 343          * - point eth_dev_data to internals and pci_driver
 344          * - and point eth_dev structure to new eth_dev_data structure
 345          */
 346         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 347          * so the rings are local per-process */
 348
 349         internals->nb_rx_queues = nb_rx_queues;
 350         internals->nb_tx_queues = nb_tx_queues;
 351         for (i = 0; i < nb_rx_queues; i++) {
 352                 internals->rx_ring_queues[i].rng = rx_queues[i];
 353                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 354         }
 355         for (i = 0; i < nb_tx_queues; i++) {
 356                 internals->tx_ring_queues[i].rng = tx_queues[i];
 357                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 358         }
 359
 360         rte_ring_pmd.pci_drv.name = ring_ethdev_driver_name;
 361         rte_ring_pmd.pci_drv.id_table = &id_table;
 362
 363         pci_dev->numa_node = numa_node;
 364         pci_dev->driver = &rte_ring_pmd.pci_drv;
 365
 366         data->dev_private = internals;
 367         data->port_id = eth_dev->data->port_id;
 368         memmove(data->name, eth_dev->data->name, sizeof(data->name));
 369         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 370         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 371         data->dev_link = pmd_link;
 372         data->mac_addrs = &internals->address;
 373
 374         eth_dev->data = data;
 375         eth_dev->driver = &rte_ring_pmd;
 376         eth_dev->dev_ops = &ops;
 377         eth_dev->pci_dev = pci_dev;
 378         TAILQ_INIT(&(eth_dev->link_intr_cbs));
 379
 380         /* finally assign rx and tx ops */
 381         eth_dev->rx_pkt_burst = eth_ring_rx;
 382         eth_dev->tx_pkt_burst = eth_ring_tx;
 383
 384         return data->port_id;
 385
 386 error:
 387         rte_free(data->rx_queues);
 388         rte_free(data->tx_queues);
 389         rte_free(data);
 390         rte_free(pci_dev);
 391         rte_free(internals);
 392
 393         return -1;
 394 }
 395
 396 int
 397 rte_eth_from_ring(struct rte_ring *r)
 398 {
 399         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 400                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 401 }
 402
 403 enum dev_action{
 404         DEV_CREATE,
 405         DEV_ATTACH
 406 };
 407
 408 static int
 409 eth_dev_ring_create(const char *name, const unsigned numa_node,
 410                 enum dev_action action)
 411 {
 412         /* rx and tx are so-called from point of view of first port.
 413          * They are inverted from the point of view of second port
 414          */
 415         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 416         unsigned i;
 417         char rng_name[RTE_RING_NAMESIZE];
 418         unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 419                         RTE_PMD_RING_MAX_TX_RINGS);
 420
 421         for (i = 0; i < num_rings; i++) {
 422                 snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
 423                 rxtx[i] = (action == DEV_CREATE) ?
 424                                 rte_ring_create(rng_name, 1024, numa_node,
 425                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 426                                 rte_ring_lookup(rng_name);
 427                 if (rxtx[i] == NULL)
 428                         return -1;
 429         }
 430
 431         if (rte_eth_from_rings(name, rxtx, num_rings, rxtx, num_rings, numa_node) < 0)
 432                 return -1;
 433
 434         return 0;
 435 }
 436
 437 struct node_action_pair {
 438         char name[PATH_MAX];
 439         unsigned node;
 440         enum dev_action action;
 441 };
 442
 443 struct node_action_list {
 444         unsigned total;
 445         unsigned count;
 446         struct node_action_pair *list;
 447 };
 448
 449 static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
 450 {
 451         struct node_action_list *info = data;
 452         int ret;
 453         char *name;
 454         char *action;
 455         char *node;
 456         char *end;
 457
 458         name = strdup(value);
 459
 460         ret = -EINVAL;
 461
 462         if (!name) {
 463                 RTE_LOG(WARNING, PMD, "command line paramter is empty for ring pmd!\n");
 464                 goto out;
 465         }
 466
 467         node = strchr(name, ':');
 468         if (!node) {
 469                 RTE_LOG(WARNING, PMD, "could not parse node value from %s", name);
 470                 goto out;
 471         }
 472
 473         *node = '\0';
 474         node++;
 475
 476         action = strchr(node, ':');
 477         if (!action) {
 478                 RTE_LOG(WARNING, PMD, "could not action value from %s", node);
 479                 goto out;
 480         }
 481
 482         *action = '\0';
 483         action++;
 484
 485         /*
 486          * Need to do some sanity checking here
 487          */
 488
 489         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 490                 info->list[info->count].action = DEV_ATTACH;
 491         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 492                 info->list[info->count].action = DEV_CREATE;
 493         else
 494                 goto out;
 495
 496         errno = 0;
 497         info->list[info->count].node = strtol(node, &end, 10);
 498
 499         if ((errno != 0) || (*end != '\0')) {
 500                 RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
 501                 goto out;
 502         }
 503
 504         snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);
 505
 506         info->count++;
 507
 508         ret = 0;
 509 out:
 510         free(name);
 511         return ret;
 512 }
 513
 514 static int
 515 rte_pmd_ring_devinit(const char *name, const char *params)
 516 {
 517         struct rte_kvargs *kvlist = NULL;
 518         int ret = 0;
 519         struct node_action_list *info = NULL;
 520
 521         RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
 522
 523         if (params == NULL || params[0] == '\0') {
 524                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
 525                 if (ret == -1) {
 526                         RTE_LOG(INFO, PMD,
 527                                 "Attach to pmd_ring for %s\n", name);
 528                         ret = eth_dev_ring_create(name, rte_socket_id(),
 529                                                   DEV_ATTACH);
 530                 }
 531         }
 532         else {
 533                 kvlist = rte_kvargs_parse(params, valid_arguments);
 534
 535                 if (!kvlist) {
 536                         RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
 537                                         " rings-backed ethernet device\n");
 538                         ret = eth_dev_ring_create(name, rte_socket_id(),
 539                                                   DEV_CREATE);
 540                         if (ret == -1) {
 541                                 RTE_LOG(INFO, PMD,
 542                                         "Attach to pmd_ring for %s\n",
 543                                         name);
 544                                 ret = eth_dev_ring_create(name, rte_socket_id(),
 545                                                           DEV_ATTACH);
 546                         }
 547                         return ret;
 548                 } else {
 549                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 550                         info = rte_zmalloc("struct node_action_list",
 551                                            sizeof(struct node_action_list) +
 552                                            (sizeof(struct node_action_pair) * ret),
 553                                            0);
 554                         if (!info)
 555                                 goto out_free;
 556
 557                         info->total = ret;
 558                         info->list = (struct node_action_pair*)(info + 1);
 559
 560                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 561                                                  parse_kvlist, info);
 562
 563                         if (ret < 0)
 564                                 goto out_free;
 565
 566                         for (info->count = 0; info->count < info->total; info->count++) {
 567                                 ret = eth_dev_ring_create(name,
 568                                                           info->list[info->count].node,
 569                                                           info->list[info->count].action);
 570                                 if ((ret == -1) &&
 571                                     (info->list[info->count].action == DEV_CREATE)) {
 572                                         RTE_LOG(INFO, PMD,
 573                                                 "Attach to pmd_ring for %s\n",
 574                                                 name);
 575                                         ret = eth_dev_ring_create(name,
 576                                                         info->list[info->count].node,
 577                                                         DEV_ATTACH);
 578                                 }
 579                         }
 580                 }
 581         }
 582
 583 out_free:
 584         rte_kvargs_free(kvlist);
 585         rte_free(info);
 586         return ret;
 587 }
 588
 589 static int
 590 rte_pmd_ring_devuninit(const char *name)
 591 {
 592         struct rte_eth_dev *eth_dev = NULL;
 593
 594         RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
 595
 596         if (name == NULL)
 597                 return -EINVAL;
 598
 599         /* find an ethdev entry */
 600         eth_dev = rte_eth_dev_allocated(name);
 601         if (eth_dev == NULL)
 602                 return -ENODEV;
 603
 604         eth_dev_stop(eth_dev);
 605         rte_free(eth_dev->data->dev_private);
 606         rte_free(eth_dev->data);
 607         rte_free(eth_dev->pci_dev);
 608
 609         rte_eth_dev_release_port(eth_dev);
 610         return 0;
 611 }
 612
 613 static struct rte_driver pmd_ring_drv = {
 614         .name = "eth_ring",
 615         .type = PMD_VDEV,
 616         .init = rte_pmd_ring_devinit,
 617         .uninit = rte_pmd_ring_devuninit,
 618 };
 619
 620 PMD_REGISTER_DRIVER(pmd_ring_drv);