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         /* now put it all together
 340          * - store queue data in internals,
 341          * - store numa_node info in eth_dev_data
 342          * - point eth_dev_data to internals
 343          * - and point eth_dev structure to new eth_dev_data structure
 344          */
 345         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 346          * so the rings are local per-process */
 347
 348         internals->nb_rx_queues = nb_rx_queues;
 349         internals->nb_tx_queues = nb_tx_queues;
 350         for (i = 0; i < nb_rx_queues; i++) {
 351                 internals->rx_ring_queues[i].rng = rx_queues[i];
 352                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 353         }
 354         for (i = 0; i < nb_tx_queues; i++) {
 355                 internals->tx_ring_queues[i].rng = tx_queues[i];
 356                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 357         }
 358
 359         rte_ring_pmd.pci_drv.name = ring_ethdev_driver_name;
 360         rte_ring_pmd.pci_drv.id_table = &id_table;
 361
 362         pci_dev->numa_node = numa_node;
 363         pci_dev->driver = &rte_ring_pmd.pci_drv;
 364
 365         data->dev_private = internals;
 366         data->port_id = eth_dev->data->port_id;
 367         memmove(data->name, eth_dev->data->name, sizeof(data->name));
 368         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 369         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 370         data->dev_link = pmd_link;
 371         data->mac_addrs = &internals->address;
 372
 373         eth_dev->data = data;
 374         eth_dev->driver = &rte_ring_pmd;
 375         eth_dev->dev_ops = &ops;
 376         eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
 377         eth_dev->data->kdrv = RTE_KDRV_NONE;
 378         eth_dev->data->drv_name = drivername;
 379         eth_dev->data->numa_node = numa_node;
 380
 381         TAILQ_INIT(&(eth_dev->link_intr_cbs));
 382
 383         /* finally assign rx and tx ops */
 384         eth_dev->rx_pkt_burst = eth_ring_rx;
 385         eth_dev->tx_pkt_burst = eth_ring_tx;
 386
 387         return data->port_id;
 388
 389 error:
 390         rte_free(data->rx_queues);
 391         rte_free(data->tx_queues);
 392         rte_free(data);
 393         rte_free(pci_dev);
 394         rte_free(internals);
 395
 396         return -1;
 397 }
 398
 399 int
 400 rte_eth_from_ring(struct rte_ring *r)
 401 {
 402         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 403                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 404 }
 405
 406 enum dev_action{
 407         DEV_CREATE,
 408         DEV_ATTACH
 409 };
 410
 411 static int
 412 eth_dev_ring_create(const char *name, const unsigned numa_node,
 413                 enum dev_action action)
 414 {
 415         /* rx and tx are so-called from point of view of first port.
 416          * They are inverted from the point of view of second port
 417          */
 418         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 419         unsigned i;
 420         char rng_name[RTE_RING_NAMESIZE];
 421         unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 422                         RTE_PMD_RING_MAX_TX_RINGS);
 423
 424         for (i = 0; i < num_rings; i++) {
 425                 snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
 426                 rxtx[i] = (action == DEV_CREATE) ?
 427                                 rte_ring_create(rng_name, 1024, numa_node,
 428                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 429                                 rte_ring_lookup(rng_name);
 430                 if (rxtx[i] == NULL)
 431                         return -1;
 432         }
 433
 434         if (rte_eth_from_rings(name, rxtx, num_rings, rxtx, num_rings, numa_node) < 0)
 435                 return -1;
 436
 437         return 0;
 438 }
 439
 440 struct node_action_pair {
 441         char name[PATH_MAX];
 442         unsigned node;
 443         enum dev_action action;
 444 };
 445
 446 struct node_action_list {
 447         unsigned total;
 448         unsigned count;
 449         struct node_action_pair *list;
 450 };
 451
 452 static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
 453 {
 454         struct node_action_list *info = data;
 455         int ret;
 456         char *name;
 457         char *action;
 458         char *node;
 459         char *end;
 460
 461         name = strdup(value);
 462
 463         ret = -EINVAL;
 464
 465         if (!name) {
 466                 RTE_LOG(WARNING, PMD, "command line paramter is empty for ring pmd!\n");
 467                 goto out;
 468         }
 469
 470         node = strchr(name, ':');
 471         if (!node) {
 472                 RTE_LOG(WARNING, PMD, "could not parse node value from %s", name);
 473                 goto out;
 474         }
 475
 476         *node = '\0';
 477         node++;
 478
 479         action = strchr(node, ':');
 480         if (!action) {
 481                 RTE_LOG(WARNING, PMD, "could not action value from %s", node);
 482                 goto out;
 483         }
 484
 485         *action = '\0';
 486         action++;
 487
 488         /*
 489          * Need to do some sanity checking here
 490          */
 491
 492         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 493                 info->list[info->count].action = DEV_ATTACH;
 494         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 495                 info->list[info->count].action = DEV_CREATE;
 496         else
 497                 goto out;
 498
 499         errno = 0;
 500         info->list[info->count].node = strtol(node, &end, 10);
 501
 502         if ((errno != 0) || (*end != '\0')) {
 503                 RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
 504                 goto out;
 505         }
 506
 507         snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);
 508
 509         info->count++;
 510
 511         ret = 0;
 512 out:
 513         free(name);
 514         return ret;
 515 }
 516
 517 static int
 518 rte_pmd_ring_devinit(const char *name, const char *params)
 519 {
 520         struct rte_kvargs *kvlist = NULL;
 521         int ret = 0;
 522         struct node_action_list *info = NULL;
 523
 524         RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
 525
 526         if (params == NULL || params[0] == '\0') {
 527                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
 528                 if (ret == -1) {
 529                         RTE_LOG(INFO, PMD,
 530                                 "Attach to pmd_ring for %s\n", name);
 531                         ret = eth_dev_ring_create(name, rte_socket_id(),
 532                                                   DEV_ATTACH);
 533                 }
 534         }
 535         else {
 536                 kvlist = rte_kvargs_parse(params, valid_arguments);
 537
 538                 if (!kvlist) {
 539                         RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
 540                                         " rings-backed ethernet device\n");
 541                         ret = eth_dev_ring_create(name, rte_socket_id(),
 542                                                   DEV_CREATE);
 543                         if (ret == -1) {
 544                                 RTE_LOG(INFO, PMD,
 545                                         "Attach to pmd_ring for %s\n",
 546                                         name);
 547                                 ret = eth_dev_ring_create(name, rte_socket_id(),
 548                                                           DEV_ATTACH);
 549                         }
 550                         return ret;
 551                 } else {
 552                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 553                         info = rte_zmalloc("struct node_action_list",
 554                                            sizeof(struct node_action_list) +
 555                                            (sizeof(struct node_action_pair) * ret),
 556                                            0);
 557                         if (!info)
 558                                 goto out_free;
 559
 560                         info->total = ret;
 561                         info->list = (struct node_action_pair*)(info + 1);
 562
 563                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 564                                                  parse_kvlist, info);
 565
 566                         if (ret < 0)
 567                                 goto out_free;
 568
 569                         for (info->count = 0; info->count < info->total; info->count++) {
 570                                 ret = eth_dev_ring_create(name,
 571                                                           info->list[info->count].node,
 572                                                           info->list[info->count].action);
 573                                 if ((ret == -1) &&
 574                                     (info->list[info->count].action == DEV_CREATE)) {
 575                                         RTE_LOG(INFO, PMD,
 576                                                 "Attach to pmd_ring for %s\n",
 577                                                 name);
 578                                         ret = eth_dev_ring_create(name,
 579                                                         info->list[info->count].node,
 580                                                         DEV_ATTACH);
 581                                 }
 582                         }
 583                 }
 584         }
 585
 586 out_free:
 587         rte_kvargs_free(kvlist);
 588         rte_free(info);
 589         return ret;
 590 }
 591
 592 static int
 593 rte_pmd_ring_devuninit(const char *name)
 594 {
 595         struct rte_eth_dev *eth_dev = NULL;
 596
 597         RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
 598
 599         if (name == NULL)
 600                 return -EINVAL;
 601
 602         /* find an ethdev entry */
 603         eth_dev = rte_eth_dev_allocated(name);
 604         if (eth_dev == NULL)
 605                 return -ENODEV;
 606
 607         eth_dev_stop(eth_dev);
 608         rte_free(eth_dev->data->dev_private);
 609         rte_free(eth_dev->data);
 610         rte_free(eth_dev->pci_dev);
 611
 612         rte_eth_dev_release_port(eth_dev);
 613         return 0;
 614 }
 615
 616 static struct rte_driver pmd_ring_drv = {
 617         .name = "eth_ring",
 618         .type = PMD_VDEV,
 619         .init = rte_pmd_ring_devinit,
 620         .uninit = rte_pmd_ring_devuninit,
 621 };
 622
 623 PMD_REGISTER_DRIVER(pmd_ring_drv);