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 *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 = 10000,
  81                 .link_duplex = ETH_LINK_FULL_DUPLEX,
  82                 .link_status = ETH_LINK_DOWN,
  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->driver_name = drivername;
 176         dev_info->max_mac_addrs = 1;
 177         dev_info->max_rx_pktlen = (uint32_t)-1;
 178         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
 179         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
 180         dev_info->min_rx_bufsize = 0;
 181         dev_info->pci_dev = NULL;
 182 }
 183
 184 static void
 185 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 186 {
 187         unsigned i;
 188         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 189         const struct pmd_internals *internal = dev->data->dev_private;
 190
 191         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 192                         i < dev->data->nb_rx_queues; i++) {
 193                 stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
 194                 rx_total += stats->q_ipackets[i];
 195         }
 196
 197         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 198                         i < dev->data->nb_tx_queues; i++) {
 199                 stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
 200                 stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
 201                 tx_total += stats->q_opackets[i];
 202                 tx_err_total += stats->q_errors[i];
 203         }
 204
 205         stats->ipackets = rx_total;
 206         stats->opackets = tx_total;
 207         stats->oerrors = tx_err_total;
 208 }
 209
 210 static void
 211 eth_stats_reset(struct rte_eth_dev *dev)
 212 {
 213         unsigned i;
 214         struct pmd_internals *internal = dev->data->dev_private;
 215         for (i = 0; i < dev->data->nb_rx_queues; i++)
 216                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 217         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 218                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 219                 internal->tx_ring_queues[i].err_pkts.cnt = 0;
 220         }
 221 }
 222
 223 static void
 224 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 225         uint32_t index __rte_unused)
 226 {
 227 }
 228
 229 static void
 230 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 231         struct ether_addr *mac_addr __rte_unused,
 232         uint32_t index __rte_unused,
 233         uint32_t vmdq __rte_unused)
 234 {
 235 }
 236
 237 static void
 238 eth_queue_release(void *q __rte_unused) { ; }
 239 static int
 240 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 241                 int wait_to_complete __rte_unused) { return 0; }
 242
 243 static const struct eth_dev_ops ops = {
 244         .dev_start = eth_dev_start,
 245         .dev_stop = eth_dev_stop,
 246         .dev_set_link_up = eth_dev_set_link_up,
 247         .dev_set_link_down = eth_dev_set_link_down,
 248         .dev_configure = eth_dev_configure,
 249         .dev_infos_get = eth_dev_info,
 250         .rx_queue_setup = eth_rx_queue_setup,
 251         .tx_queue_setup = eth_tx_queue_setup,
 252         .rx_queue_release = eth_queue_release,
 253         .tx_queue_release = eth_queue_release,
 254         .link_update = eth_link_update,
 255         .stats_get = eth_stats_get,
 256         .stats_reset = eth_stats_reset,
 257         .mac_addr_remove = eth_mac_addr_remove,
 258         .mac_addr_add = eth_mac_addr_add,
 259 };
 260
 261 static int
 262 do_eth_dev_ring_create(const char *name,
 263                 struct rte_ring * const rx_queues[], const unsigned nb_rx_queues,
 264                 struct rte_ring *const tx_queues[], const unsigned nb_tx_queues,
 265                 const unsigned numa_node, enum dev_action action)
 266 {
 267         struct rte_eth_dev_data *data = NULL;
 268         struct pmd_internals *internals = NULL;
 269         struct rte_eth_dev *eth_dev = NULL;
 270         unsigned i;
 271
 272         RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
 273                         numa_node);
 274
 275         /* now do all data allocation - for eth_dev structure, dummy pci driver
 276          * and internal (private) data
 277          */
 278         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 279         if (data == NULL) {
 280                 rte_errno = ENOMEM;
 281                 goto error;
 282         }
 283
 284         data->rx_queues = rte_zmalloc_socket(name,
 285                         sizeof(void *) * nb_rx_queues, 0, numa_node);
 286         if (data->rx_queues == NULL) {
 287                 rte_errno = ENOMEM;
 288                 goto error;
 289         }
 290
 291         data->tx_queues = rte_zmalloc_socket(name,
 292                         sizeof(void *) * nb_tx_queues, 0, numa_node);
 293         if (data->tx_queues == NULL) {
 294                 rte_errno = ENOMEM;
 295                 goto error;
 296         }
 297
 298         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 299         if (internals == NULL) {
 300                 rte_errno = ENOMEM;
 301                 goto error;
 302         }
 303
 304         /* reserve an ethdev entry */
 305         eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
 306         if (eth_dev == NULL) {
 307                 rte_errno = ENOSPC;
 308                 goto error;
 309         }
 310
 311         /* now put it all together
 312          * - store queue data in internals,
 313          * - store numa_node info in eth_dev_data
 314          * - point eth_dev_data to internals
 315          * - and point eth_dev structure to new eth_dev_data structure
 316          */
 317         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 318          * so the rings are local per-process */
 319
 320         internals->action = action;
 321         internals->max_rx_queues = nb_rx_queues;
 322         internals->max_tx_queues = nb_tx_queues;
 323         for (i = 0; i < nb_rx_queues; i++) {
 324                 internals->rx_ring_queues[i].rng = rx_queues[i];
 325                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 326         }
 327         for (i = 0; i < nb_tx_queues; i++) {
 328                 internals->tx_ring_queues[i].rng = tx_queues[i];
 329                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 330         }
 331
 332         data->dev_private = internals;
 333         data->port_id = eth_dev->data->port_id;
 334         memmove(data->name, eth_dev->data->name, sizeof(data->name));
 335         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 336         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 337         data->dev_link = pmd_link;
 338         data->mac_addrs = &internals->address;
 339
 340         eth_dev->data = data;
 341         eth_dev->driver = NULL;
 342         eth_dev->dev_ops = &ops;
 343         data->dev_flags = RTE_ETH_DEV_DETACHABLE;
 344         data->kdrv = RTE_KDRV_NONE;
 345         data->drv_name = drivername;
 346         data->numa_node = numa_node;
 347
 348         TAILQ_INIT(&(eth_dev->link_intr_cbs));
 349
 350         /* finally assign rx and tx ops */
 351         eth_dev->rx_pkt_burst = eth_ring_rx;
 352         eth_dev->tx_pkt_burst = eth_ring_tx;
 353
 354         return data->port_id;
 355
 356 error:
 357         if (data) {
 358                 rte_free(data->rx_queues);
 359                 rte_free(data->tx_queues);
 360         }
 361         rte_free(data);
 362         rte_free(internals);
 363
 364         return -1;
 365 }
 366
 367 int
 368 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 369                 const unsigned nb_rx_queues,
 370                 struct rte_ring *const tx_queues[],
 371                 const unsigned nb_tx_queues,
 372                 const unsigned numa_node)
 373 {
 374         /* do some parameter checking */
 375         if (rx_queues == NULL && nb_rx_queues > 0) {
 376                 rte_errno = EINVAL;
 377                 return -1;
 378         }
 379         if (tx_queues == NULL && nb_tx_queues > 0) {
 380                 rte_errno = EINVAL;
 381                 return -1;
 382         }
 383         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 384                 rte_errno = EINVAL;
 385                 return -1;
 386         }
 387
 388         return do_eth_dev_ring_create(name, rx_queues, nb_rx_queues,
 389                         tx_queues, nb_tx_queues, numa_node, DEV_ATTACH);
 390 }
 391
 392 int
 393 rte_eth_from_ring(struct rte_ring *r)
 394 {
 395         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 396                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 397 }
 398
 399 static int
 400 eth_dev_ring_create(const char *name, const unsigned numa_node,
 401                 enum dev_action action)
 402 {
 403         /* rx and tx are so-called from point of view of first port.
 404          * They are inverted from the point of view of second port
 405          */
 406         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 407         unsigned i;
 408         char rng_name[RTE_RING_NAMESIZE];
 409         unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 410                         RTE_PMD_RING_MAX_TX_RINGS);
 411
 412         for (i = 0; i < num_rings; i++) {
 413                 snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
 414                 rxtx[i] = (action == DEV_CREATE) ?
 415                                 rte_ring_create(rng_name, 1024, numa_node,
 416                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 417                                 rte_ring_lookup(rng_name);
 418                 if (rxtx[i] == NULL)
 419                         return -1;
 420         }
 421
 422         if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
 423                 numa_node, action) < 0)
 424                 return -1;
 425
 426         return 0;
 427 }
 428
 429 struct node_action_pair {
 430         char name[PATH_MAX];
 431         unsigned node;
 432         enum dev_action action;
 433 };
 434
 435 struct node_action_list {
 436         unsigned total;
 437         unsigned count;
 438         struct node_action_pair *list;
 439 };
 440
 441 static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
 442 {
 443         struct node_action_list *info = data;
 444         int ret;
 445         char *name;
 446         char *action;
 447         char *node;
 448         char *end;
 449
 450         name = strdup(value);
 451
 452         ret = -EINVAL;
 453
 454         if (!name) {
 455                 RTE_LOG(WARNING, PMD, "command line paramter is empty for ring pmd!\n");
 456                 goto out;
 457         }
 458
 459         node = strchr(name, ':');
 460         if (!node) {
 461                 RTE_LOG(WARNING, PMD, "could not parse node value from %s", name);
 462                 goto out;
 463         }
 464
 465         *node = '\0';
 466         node++;
 467
 468         action = strchr(node, ':');
 469         if (!action) {
 470                 RTE_LOG(WARNING, PMD, "could not action value from %s", node);
 471                 goto out;
 472         }
 473
 474         *action = '\0';
 475         action++;
 476
 477         /*
 478          * Need to do some sanity checking here
 479          */
 480
 481         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 482                 info->list[info->count].action = DEV_ATTACH;
 483         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 484                 info->list[info->count].action = DEV_CREATE;
 485         else
 486                 goto out;
 487
 488         errno = 0;
 489         info->list[info->count].node = strtol(node, &end, 10);
 490
 491         if ((errno != 0) || (*end != '\0')) {
 492                 RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
 493                 goto out;
 494         }
 495
 496         snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);
 497
 498         info->count++;
 499
 500         ret = 0;
 501 out:
 502         free(name);
 503         return ret;
 504 }
 505
 506 static int
 507 rte_pmd_ring_devinit(const char *name, const char *params)
 508 {
 509         struct rte_kvargs *kvlist = NULL;
 510         int ret = 0;
 511         struct node_action_list *info = NULL;
 512
 513         RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
 514
 515         if (params == NULL || params[0] == '\0') {
 516                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
 517                 if (ret == -1) {
 518                         RTE_LOG(INFO, PMD,
 519                                 "Attach to pmd_ring for %s\n", name);
 520                         ret = eth_dev_ring_create(name, rte_socket_id(),
 521                                                   DEV_ATTACH);
 522                 }
 523         }
 524         else {
 525                 kvlist = rte_kvargs_parse(params, valid_arguments);
 526
 527                 if (!kvlist) {
 528                         RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
 529                                         " rings-backed ethernet device\n");
 530                         ret = eth_dev_ring_create(name, rte_socket_id(),
 531                                                   DEV_CREATE);
 532                         if (ret == -1) {
 533                                 RTE_LOG(INFO, PMD,
 534                                         "Attach to pmd_ring for %s\n",
 535                                         name);
 536                                 ret = eth_dev_ring_create(name, rte_socket_id(),
 537                                                           DEV_ATTACH);
 538                         }
 539                         return ret;
 540                 } else {
 541                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 542                         info = rte_zmalloc("struct node_action_list",
 543                                            sizeof(struct node_action_list) +
 544                                            (sizeof(struct node_action_pair) * ret),
 545                                            0);
 546                         if (!info)
 547                                 goto out_free;
 548
 549                         info->total = ret;
 550                         info->list = (struct node_action_pair*)(info + 1);
 551
 552                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 553                                                  parse_kvlist, info);
 554
 555                         if (ret < 0)
 556                                 goto out_free;
 557
 558                         for (info->count = 0; info->count < info->total; info->count++) {
 559                                 ret = eth_dev_ring_create(name,
 560                                                           info->list[info->count].node,
 561                                                           info->list[info->count].action);
 562                                 if ((ret == -1) &&
 563                                     (info->list[info->count].action == DEV_CREATE)) {
 564                                         RTE_LOG(INFO, PMD,
 565                                                 "Attach to pmd_ring for %s\n",
 566                                                 name);
 567                                         ret = eth_dev_ring_create(name,
 568                                                         info->list[info->count].node,
 569                                                         DEV_ATTACH);
 570                                 }
 571                         }
 572                 }
 573         }
 574
 575 out_free:
 576         rte_kvargs_free(kvlist);
 577         rte_free(info);
 578         return ret;
 579 }
 580
 581 static int
 582 rte_pmd_ring_devuninit(const char *name)
 583 {
 584         struct rte_eth_dev *eth_dev = NULL;
 585         struct pmd_internals *internals = NULL;
 586         struct ring_queue *r = NULL;
 587         uint16_t i;
 588
 589         RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
 590
 591         if (name == NULL)
 592                 return -EINVAL;
 593
 594         /* find an ethdev entry */
 595         eth_dev = rte_eth_dev_allocated(name);
 596         if (eth_dev == NULL)
 597                 return -ENODEV;
 598
 599         eth_dev_stop(eth_dev);
 600
 601         if (eth_dev->data) {
 602                 internals = eth_dev->data->dev_private;
 603                 if (internals->action == DEV_CREATE) {
 604                         /*
 605                          * it is only necessary to delete the rings in rx_queues because
 606                          * they are the same used in tx_queues
 607                          */
 608                         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 609                                 r = eth_dev->data->rx_queues[i];
 610                                 rte_ring_free(r->rng);
 611                         }
 612                 }
 613
 614                 rte_free(eth_dev->data->rx_queues);
 615                 rte_free(eth_dev->data->tx_queues);
 616                 rte_free(eth_dev->data->dev_private);
 617         }
 618
 619         rte_free(eth_dev->data);
 620
 621         rte_eth_dev_release_port(eth_dev);
 622         return 0;
 623 }
 624
 625 static struct rte_driver pmd_ring_drv = {
 626         .name = "eth_ring",
 627         .type = PMD_VDEV,
 628         .init = rte_pmd_ring_devinit,
 629         .uninit = rte_pmd_ring_devuninit,
 630 };
 631
 632 PMD_REGISTER_DRIVER(pmd_ring_drv);