drivers/net/ring/rte_eth_ring.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2015 Intel Corporation
   3  */
   4
   5 #include "rte_eth_ring.h"
   6 #include <rte_mbuf.h>
   7 #include <rte_ethdev_driver.h>
   8 #include <rte_malloc.h>
   9 #include <rte_memcpy.h>
  10 #include <rte_string_fns.h>
  11 #include <rte_bus_vdev.h>
  12 #include <rte_kvargs.h>
  13 #include <rte_errno.h>
  14
  15 #define ETH_RING_NUMA_NODE_ACTION_ARG   "nodeaction"
  16 #define ETH_RING_ACTION_CREATE          "CREATE"
  17 #define ETH_RING_ACTION_ATTACH          "ATTACH"
  18 #define ETH_RING_INTERNAL_ARG           "internal"
  19
  20 static const char *valid_arguments[] = {
  21         ETH_RING_NUMA_NODE_ACTION_ARG,
  22         ETH_RING_INTERNAL_ARG,
  23         NULL
  24 };
  25
  26 struct ring_internal_args {
  27         struct rte_ring * const *rx_queues;
  28         const unsigned int nb_rx_queues;
  29         struct rte_ring * const *tx_queues;
  30         const unsigned int nb_tx_queues;
  31         const unsigned int numa_node;
  32         void *addr; /* self addr for sanity check */
  33 };
  34
  35 enum dev_action {
  36         DEV_CREATE,
  37         DEV_ATTACH
  38 };
  39
  40 struct ring_queue {
  41         struct rte_ring *rng;
  42         rte_atomic64_t rx_pkts;
  43         rte_atomic64_t tx_pkts;
  44         rte_atomic64_t err_pkts;
  45 };
  46
  47 struct pmd_internals {
  48         unsigned max_rx_queues;
  49         unsigned max_tx_queues;
  50
  51         struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
  52         struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
  53
  54         struct ether_addr address;
  55         enum dev_action action;
  56 };
  57
  58
  59 static struct rte_eth_link pmd_link = {
  60                 .link_speed = ETH_SPEED_NUM_10G,
  61                 .link_duplex = ETH_LINK_FULL_DUPLEX,
  62                 .link_status = ETH_LINK_DOWN,
  63                 .link_autoneg = ETH_LINK_AUTONEG
  64 };
  65
  66 static uint16_t
  67 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  68 {
  69         void **ptrs = (void *)&bufs[0];
  70         struct ring_queue *r = q;
  71         const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
  72                         ptrs, nb_bufs, NULL);
  73         if (r->rng->flags & RING_F_SC_DEQ)
  74                 r->rx_pkts.cnt += nb_rx;
  75         else
  76                 rte_atomic64_add(&(r->rx_pkts), nb_rx);
  77         return nb_rx;
  78 }
  79
  80 static uint16_t
  81 eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  82 {
  83         void **ptrs = (void *)&bufs[0];
  84         struct ring_queue *r = q;
  85         const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
  86                         ptrs, nb_bufs, NULL);
  87         if (r->rng->flags & RING_F_SP_ENQ) {
  88                 r->tx_pkts.cnt += nb_tx;
  89                 r->err_pkts.cnt += nb_bufs - nb_tx;
  90         } else {
  91                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
  92                 rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
  93         }
  94         return nb_tx;
  95 }
  96
  97 static int
  98 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
  99
 100 static int
 101 eth_dev_start(struct rte_eth_dev *dev)
 102 {
 103         dev->data->dev_link.link_status = ETH_LINK_UP;
 104         return 0;
 105 }
 106
 107 static void
 108 eth_dev_stop(struct rte_eth_dev *dev)
 109 {
 110         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 111 }
 112
 113 static int
 114 eth_dev_set_link_down(struct rte_eth_dev *dev)
 115 {
 116         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 117         return 0;
 118 }
 119
 120 static int
 121 eth_dev_set_link_up(struct rte_eth_dev *dev)
 122 {
 123         dev->data->dev_link.link_status = ETH_LINK_UP;
 124         return 0;
 125 }
 126
 127 static int
 128 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 129                                     uint16_t nb_rx_desc __rte_unused,
 130                                     unsigned int socket_id __rte_unused,
 131                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
 132                                     struct rte_mempool *mb_pool __rte_unused)
 133 {
 134         struct pmd_internals *internals = dev->data->dev_private;
 135         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
 136         return 0;
 137 }
 138
 139 static int
 140 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 141                                     uint16_t nb_tx_desc __rte_unused,
 142                                     unsigned int socket_id __rte_unused,
 143                                     const struct rte_eth_txconf *tx_conf __rte_unused)
 144 {
 145         struct pmd_internals *internals = dev->data->dev_private;
 146         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
 147         return 0;
 148 }
 149
 150
 151 static void
 152 eth_dev_info(struct rte_eth_dev *dev,
 153                 struct rte_eth_dev_info *dev_info)
 154 {
 155         struct pmd_internals *internals = dev->data->dev_private;
 156         dev_info->max_mac_addrs = 1;
 157         dev_info->max_rx_pktlen = (uint32_t)-1;
 158         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
 159         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
 160         dev_info->min_rx_bufsize = 0;
 161 }
 162
 163 static int
 164 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 165 {
 166         unsigned i;
 167         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 168         const struct pmd_internals *internal = dev->data->dev_private;
 169
 170         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 171                         i < dev->data->nb_rx_queues; i++) {
 172                 stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
 173                 rx_total += stats->q_ipackets[i];
 174         }
 175
 176         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 177                         i < dev->data->nb_tx_queues; i++) {
 178                 stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
 179                 stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
 180                 tx_total += stats->q_opackets[i];
 181                 tx_err_total += stats->q_errors[i];
 182         }
 183
 184         stats->ipackets = rx_total;
 185         stats->opackets = tx_total;
 186         stats->oerrors = tx_err_total;
 187
 188         return 0;
 189 }
 190
 191 static void
 192 eth_stats_reset(struct rte_eth_dev *dev)
 193 {
 194         unsigned i;
 195         struct pmd_internals *internal = dev->data->dev_private;
 196         for (i = 0; i < dev->data->nb_rx_queues; i++)
 197                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 198         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 199                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 200                 internal->tx_ring_queues[i].err_pkts.cnt = 0;
 201         }
 202 }
 203
 204 static void
 205 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 206         uint32_t index __rte_unused)
 207 {
 208 }
 209
 210 static int
 211 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 212         struct ether_addr *mac_addr __rte_unused,
 213         uint32_t index __rte_unused,
 214         uint32_t vmdq __rte_unused)
 215 {
 216         return 0;
 217 }
 218
 219 static void
 220 eth_queue_release(void *q __rte_unused) { ; }
 221 static int
 222 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 223                 int wait_to_complete __rte_unused) { return 0; }
 224
 225 static const struct eth_dev_ops ops = {
 226         .dev_start = eth_dev_start,
 227         .dev_stop = eth_dev_stop,
 228         .dev_set_link_up = eth_dev_set_link_up,
 229         .dev_set_link_down = eth_dev_set_link_down,
 230         .dev_configure = eth_dev_configure,
 231         .dev_infos_get = eth_dev_info,
 232         .rx_queue_setup = eth_rx_queue_setup,
 233         .tx_queue_setup = eth_tx_queue_setup,
 234         .rx_queue_release = eth_queue_release,
 235         .tx_queue_release = eth_queue_release,
 236         .link_update = eth_link_update,
 237         .stats_get = eth_stats_get,
 238         .stats_reset = eth_stats_reset,
 239         .mac_addr_remove = eth_mac_addr_remove,
 240         .mac_addr_add = eth_mac_addr_add,
 241 };
 242
 243 static struct rte_vdev_driver pmd_ring_drv;
 244
 245 static int
 246 do_eth_dev_ring_create(const char *name,
 247                 struct rte_ring * const rx_queues[], const unsigned nb_rx_queues,
 248                 struct rte_ring *const tx_queues[], const unsigned nb_tx_queues,
 249                 const unsigned int numa_node, enum dev_action action,
 250                 struct rte_eth_dev **eth_dev_p)
 251 {
 252         struct rte_eth_dev_data *data = NULL;
 253         struct pmd_internals *internals = NULL;
 254         struct rte_eth_dev *eth_dev = NULL;
 255         void **rx_queues_local = NULL;
 256         void **tx_queues_local = NULL;
 257         unsigned i;
 258
 259         RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
 260                         numa_node);
 261
 262         rx_queues_local = rte_zmalloc_socket(name,
 263                         sizeof(void *) * nb_rx_queues, 0, numa_node);
 264         if (rx_queues_local == NULL) {
 265                 rte_errno = ENOMEM;
 266                 goto error;
 267         }
 268
 269         tx_queues_local = rte_zmalloc_socket(name,
 270                         sizeof(void *) * nb_tx_queues, 0, numa_node);
 271         if (tx_queues_local == NULL) {
 272                 rte_errno = ENOMEM;
 273                 goto error;
 274         }
 275
 276         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 277         if (internals == NULL) {
 278                 rte_errno = ENOMEM;
 279                 goto error;
 280         }
 281
 282         /* reserve an ethdev entry */
 283         eth_dev = rte_eth_dev_allocate(name);
 284         if (eth_dev == NULL) {
 285                 rte_errno = ENOSPC;
 286                 goto error;
 287         }
 288
 289         /* now put it all together
 290          * - store queue data in internals,
 291          * - store numa_node info in eth_dev_data
 292          * - point eth_dev_data to internals
 293          * - and point eth_dev structure to new eth_dev_data structure
 294          */
 295
 296         data = eth_dev->data;
 297         data->rx_queues = rx_queues_local;
 298         data->tx_queues = tx_queues_local;
 299
 300         internals->action = action;
 301         internals->max_rx_queues = nb_rx_queues;
 302         internals->max_tx_queues = nb_tx_queues;
 303         for (i = 0; i < nb_rx_queues; i++) {
 304                 internals->rx_ring_queues[i].rng = rx_queues[i];
 305                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 306         }
 307         for (i = 0; i < nb_tx_queues; i++) {
 308                 internals->tx_ring_queues[i].rng = tx_queues[i];
 309                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 310         }
 311
 312         data->dev_private = internals;
 313         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 314         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 315         data->dev_link = pmd_link;
 316         data->mac_addrs = &internals->address;
 317
 318         eth_dev->dev_ops = &ops;
 319         data->kdrv = RTE_KDRV_NONE;
 320         data->numa_node = numa_node;
 321
 322         /* finally assign rx and tx ops */
 323         eth_dev->rx_pkt_burst = eth_ring_rx;
 324         eth_dev->tx_pkt_burst = eth_ring_tx;
 325
 326         *eth_dev_p = eth_dev;
 327
 328         return data->port_id;
 329
 330 error:
 331         rte_free(rx_queues_local);
 332         rte_free(tx_queues_local);
 333         rte_free(internals);
 334
 335         return -1;
 336 }
 337
 338 int
 339 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 340                 const unsigned nb_rx_queues,
 341                 struct rte_ring *const tx_queues[],
 342                 const unsigned nb_tx_queues,
 343                 const unsigned numa_node)
 344 {
 345         struct ring_internal_args args = {
 346                 .rx_queues = rx_queues,
 347                 .nb_rx_queues = nb_rx_queues,
 348                 .tx_queues = tx_queues,
 349                 .nb_tx_queues = nb_tx_queues,
 350                 .numa_node = numa_node,
 351                 .addr = &args,
 352         };
 353         char args_str[32] = { 0 };
 354         char ring_name[32] = { 0 };
 355         uint16_t port_id = RTE_MAX_ETHPORTS;
 356         int ret;
 357
 358         /* do some parameter checking */
 359         if (rx_queues == NULL && nb_rx_queues > 0) {
 360                 rte_errno = EINVAL;
 361                 return -1;
 362         }
 363         if (tx_queues == NULL && nb_tx_queues > 0) {
 364                 rte_errno = EINVAL;
 365                 return -1;
 366         }
 367         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 368                 rte_errno = EINVAL;
 369                 return -1;
 370         }
 371
 372         snprintf(args_str, 32, "%s=%p", ETH_RING_INTERNAL_ARG, &args);
 373         snprintf(ring_name, 32, "net_ring_%s", name);
 374
 375         ret = rte_vdev_init(ring_name, args_str);
 376         if (ret) {
 377                 rte_errno = EINVAL;
 378                 return -1;
 379         }
 380
 381         rte_eth_dev_get_port_by_name(ring_name, &port_id);
 382
 383         return port_id;
 384 }
 385
 386 int
 387 rte_eth_from_ring(struct rte_ring *r)
 388 {
 389         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 390                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 391 }
 392
 393 static int
 394 eth_dev_ring_create(const char *name, const unsigned numa_node,
 395                 enum dev_action action, struct rte_eth_dev **eth_dev)
 396 {
 397         /* rx and tx are so-called from point of view of first port.
 398          * They are inverted from the point of view of second port
 399          */
 400         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 401         unsigned i;
 402         char rng_name[RTE_RING_NAMESIZE];
 403         unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 404                         RTE_PMD_RING_MAX_TX_RINGS);
 405
 406         for (i = 0; i < num_rings; i++) {
 407                 snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
 408                 rxtx[i] = (action == DEV_CREATE) ?
 409                                 rte_ring_create(rng_name, 1024, numa_node,
 410                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 411                                 rte_ring_lookup(rng_name);
 412                 if (rxtx[i] == NULL)
 413                         return -1;
 414         }
 415
 416         if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
 417                 numa_node, action, eth_dev) < 0)
 418                 return -1;
 419
 420         return 0;
 421 }
 422
 423 struct node_action_pair {
 424         char name[PATH_MAX];
 425         unsigned node;
 426         enum dev_action action;
 427 };
 428
 429 struct node_action_list {
 430         unsigned total;
 431         unsigned count;
 432         struct node_action_pair *list;
 433 };
 434
 435 static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
 436 {
 437         struct node_action_list *info = data;
 438         int ret;
 439         char *name;
 440         char *action;
 441         char *node;
 442         char *end;
 443
 444         name = strdup(value);
 445
 446         ret = -EINVAL;
 447
 448         if (!name) {
 449                 RTE_LOG(WARNING, PMD, "command line parameter is empty for ring pmd!\n");
 450                 goto out;
 451         }
 452
 453         node = strchr(name, ':');
 454         if (!node) {
 455                 RTE_LOG(WARNING, PMD, "could not parse node value from %s\n",
 456                         name);
 457                 goto out;
 458         }
 459
 460         *node = '\0';
 461         node++;
 462
 463         action = strchr(node, ':');
 464         if (!action) {
 465                 RTE_LOG(WARNING, PMD, "could not parse action value from %s\n",
 466                         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 parse_internal_args(const char *key __rte_unused, const char *value,
 504                 void *data)
 505 {
 506         struct ring_internal_args **internal_args = data;
 507         void *args;
 508
 509         sscanf(value, "%p", &args);
 510
 511         *internal_args = args;
 512
 513         if ((*internal_args)->addr != args)
 514                 return -1;
 515
 516         return 0;
 517 }
 518
 519 static int
 520 rte_pmd_ring_probe(struct rte_vdev_device *dev)
 521 {
 522         const char *name, *params;
 523         struct rte_kvargs *kvlist = NULL;
 524         int ret = 0;
 525         struct node_action_list *info = NULL;
 526         struct rte_eth_dev *eth_dev = NULL;
 527         struct ring_internal_args *internal_args;
 528
 529         name = rte_vdev_device_name(dev);
 530         params = rte_vdev_device_args(dev);
 531
 532         RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
 533
 534         if (params == NULL || params[0] == '\0') {
 535                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE,
 536                                 &eth_dev);
 537                 if (ret == -1) {
 538                         RTE_LOG(INFO, PMD,
 539                                 "Attach to pmd_ring for %s\n", name);
 540                         ret = eth_dev_ring_create(name, rte_socket_id(),
 541                                                   DEV_ATTACH, &eth_dev);
 542                 }
 543         } else {
 544                 kvlist = rte_kvargs_parse(params, valid_arguments);
 545
 546                 if (!kvlist) {
 547                         RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
 548                                         " rings-backed ethernet device\n");
 549                         ret = eth_dev_ring_create(name, rte_socket_id(),
 550                                                   DEV_CREATE, &eth_dev);
 551                         if (ret == -1) {
 552                                 RTE_LOG(INFO, PMD,
 553                                         "Attach to pmd_ring for %s\n",
 554                                         name);
 555                                 ret = eth_dev_ring_create(name, rte_socket_id(),
 556                                                           DEV_ATTACH, &eth_dev);
 557                         }
 558
 559                         if (eth_dev)
 560                                 eth_dev->device = &dev->device;
 561
 562                         return ret;
 563                 }
 564
 565                 if (rte_kvargs_count(kvlist, ETH_RING_INTERNAL_ARG) == 1) {
 566                         ret = rte_kvargs_process(kvlist, ETH_RING_INTERNAL_ARG,
 567                                                  parse_internal_args,
 568                                                  &internal_args);
 569                         if (ret < 0)
 570                                 goto out_free;
 571
 572                         ret = do_eth_dev_ring_create(name,
 573                                 internal_args->rx_queues,
 574                                 internal_args->nb_rx_queues,
 575                                 internal_args->tx_queues,
 576                                 internal_args->nb_tx_queues,
 577                                 internal_args->numa_node,
 578                                 DEV_ATTACH,
 579                                 &eth_dev);
 580                         if (ret >= 0)
 581                                 ret = 0;
 582                 } else {
 583                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 584                         info = rte_zmalloc("struct node_action_list",
 585                                            sizeof(struct node_action_list) +
 586                                            (sizeof(struct node_action_pair) * ret),
 587                                            0);
 588                         if (!info)
 589                                 goto out_free;
 590
 591                         info->total = ret;
 592                         info->list = (struct node_action_pair*)(info + 1);
 593
 594                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 595                                                  parse_kvlist, info);
 596
 597                         if (ret < 0)
 598                                 goto out_free;
 599
 600                         for (info->count = 0; info->count < info->total; info->count++) {
 601                                 ret = eth_dev_ring_create(info->list[info->count].name,
 602                                                           info->list[info->count].node,
 603                                                           info->list[info->count].action,
 604                                                           &eth_dev);
 605                                 if ((ret == -1) &&
 606                                     (info->list[info->count].action == DEV_CREATE)) {
 607                                         RTE_LOG(INFO, PMD,
 608                                                 "Attach to pmd_ring for %s\n",
 609                                                 name);
 610                                         ret = eth_dev_ring_create(name,
 611                                                         info->list[info->count].node,
 612                                                         DEV_ATTACH,
 613                                                         &eth_dev);
 614                                 }
 615                         }
 616                 }
 617         }
 618
 619         if (eth_dev)
 620                 eth_dev->device = &dev->device;
 621
 622 out_free:
 623         rte_kvargs_free(kvlist);
 624         rte_free(info);
 625         return ret;
 626 }
 627
 628 static int
 629 rte_pmd_ring_remove(struct rte_vdev_device *dev)
 630 {
 631         const char *name = rte_vdev_device_name(dev);
 632         struct rte_eth_dev *eth_dev = NULL;
 633         struct pmd_internals *internals = NULL;
 634         struct ring_queue *r = NULL;
 635         uint16_t i;
 636
 637         RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
 638
 639         if (name == NULL)
 640                 return -EINVAL;
 641
 642         /* find an ethdev entry */
 643         eth_dev = rte_eth_dev_allocated(name);
 644         if (eth_dev == NULL)
 645                 return -ENODEV;
 646
 647         eth_dev_stop(eth_dev);
 648
 649         internals = eth_dev->data->dev_private;
 650         if (internals->action == DEV_CREATE) {
 651                 /*
 652                  * it is only necessary to delete the rings in rx_queues because
 653                  * they are the same used in tx_queues
 654                  */
 655                 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 656                         r = eth_dev->data->rx_queues[i];
 657                         rte_ring_free(r->rng);
 658                 }
 659         }
 660
 661         rte_free(eth_dev->data->rx_queues);
 662         rte_free(eth_dev->data->tx_queues);
 663         rte_free(eth_dev->data->dev_private);
 664
 665         rte_eth_dev_release_port(eth_dev);
 666         return 0;
 667 }
 668
 669 static struct rte_vdev_driver pmd_ring_drv = {
 670         .probe = rte_pmd_ring_probe,
 671         .remove = rte_pmd_ring_remove,
 672 };
 673
 674 RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
 675 RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
 676 RTE_PMD_REGISTER_PARAM_STRING(net_ring,
 677         ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");