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 };
  45
  46 struct pmd_internals {
  47         unsigned int max_rx_queues;
  48         unsigned int max_tx_queues;
  49
  50         struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
  51         struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
  52
  53         struct rte_ether_addr address;
  54         enum dev_action action;
  55 };
  56
  57 static struct rte_eth_link pmd_link = {
  58         .link_speed = ETH_SPEED_NUM_10G,
  59         .link_duplex = ETH_LINK_FULL_DUPLEX,
  60         .link_status = ETH_LINK_DOWN,
  61         .link_autoneg = ETH_LINK_FIXED,
  62 };
  63
  64 RTE_LOG_REGISTER(eth_ring_logtype, pmd.net.ring, NOTICE);
  65
  66 #define PMD_LOG(level, fmt, args...) \
  67         rte_log(RTE_LOG_ ## level, eth_ring_logtype, \
  68                 "%s(): " fmt "\n", __func__, ##args)
  69
  70 static uint16_t
  71 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  72 {
  73         void **ptrs = (void *)&bufs[0];
  74         struct ring_queue *r = q;
  75         const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
  76                         ptrs, nb_bufs, NULL);
  77         if (r->rng->flags & RING_F_SC_DEQ)
  78                 r->rx_pkts.cnt += nb_rx;
  79         else
  80                 rte_atomic64_add(&(r->rx_pkts), nb_rx);
  81         return nb_rx;
  82 }
  83
  84 static uint16_t
  85 eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  86 {
  87         void **ptrs = (void *)&bufs[0];
  88         struct ring_queue *r = q;
  89         const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
  90                         ptrs, nb_bufs, NULL);
  91         if (r->rng->flags & RING_F_SP_ENQ)
  92                 r->tx_pkts.cnt += nb_tx;
  93         else
  94                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
  95         return nb_tx;
  96 }
  97
  98 static int
  99 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
 100
 101 static int
 102 eth_dev_start(struct rte_eth_dev *dev)
 103 {
 104         dev->data->dev_link.link_status = ETH_LINK_UP;
 105         return 0;
 106 }
 107
 108 static void
 109 eth_dev_stop(struct rte_eth_dev *dev)
 110 {
 111         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 112 }
 113
 114 static int
 115 eth_dev_set_link_down(struct rte_eth_dev *dev)
 116 {
 117         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 118         return 0;
 119 }
 120
 121 static int
 122 eth_dev_set_link_up(struct rte_eth_dev *dev)
 123 {
 124         dev->data->dev_link.link_status = ETH_LINK_UP;
 125         return 0;
 126 }
 127
 128 static int
 129 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 130                                     uint16_t nb_rx_desc __rte_unused,
 131                                     unsigned int socket_id __rte_unused,
 132                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
 133                                     struct rte_mempool *mb_pool __rte_unused)
 134 {
 135         struct pmd_internals *internals = dev->data->dev_private;
 136
 137         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
 138         return 0;
 139 }
 140
 141 static int
 142 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 143                                     uint16_t nb_tx_desc __rte_unused,
 144                                     unsigned int socket_id __rte_unused,
 145                                     const struct rte_eth_txconf *tx_conf __rte_unused)
 146 {
 147         struct pmd_internals *internals = dev->data->dev_private;
 148
 149         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
 150         return 0;
 151 }
 152
 153
 154 static int
 155 eth_dev_info(struct rte_eth_dev *dev,
 156              struct rte_eth_dev_info *dev_info)
 157 {
 158         struct pmd_internals *internals = dev->data->dev_private;
 159
 160         dev_info->max_mac_addrs = 1;
 161         dev_info->max_rx_pktlen = (uint32_t)-1;
 162         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
 163         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
 164         dev_info->min_rx_bufsize = 0;
 165
 166         return 0;
 167 }
 168
 169 static int
 170 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 171 {
 172         unsigned int i;
 173         unsigned long rx_total = 0, tx_total = 0;
 174         const struct pmd_internals *internal = dev->data->dev_private;
 175
 176         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 177                         i < dev->data->nb_rx_queues; i++) {
 178                 stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
 179                 rx_total += stats->q_ipackets[i];
 180         }
 181
 182         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 183                         i < dev->data->nb_tx_queues; i++) {
 184                 stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
 185                 tx_total += stats->q_opackets[i];
 186         }
 187
 188         stats->ipackets = rx_total;
 189         stats->opackets = tx_total;
 190
 191         return 0;
 192 }
 193
 194 static int
 195 eth_stats_reset(struct rte_eth_dev *dev)
 196 {
 197         unsigned int i;
 198         struct pmd_internals *internal = dev->data->dev_private;
 199
 200         for (i = 0; i < dev->data->nb_rx_queues; i++)
 201                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 202         for (i = 0; i < dev->data->nb_tx_queues; i++)
 203                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 204
 205         return 0;
 206 }
 207
 208 static void
 209 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 210         uint32_t index __rte_unused)
 211 {
 212 }
 213
 214 static int
 215 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 216         struct rte_ether_addr *mac_addr __rte_unused,
 217         uint32_t index __rte_unused,
 218         uint32_t vmdq __rte_unused)
 219 {
 220         return 0;
 221 }
 222
 223 static void
 224 eth_queue_release(void *q __rte_unused) { ; }
 225 static int
 226 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 227                 int wait_to_complete __rte_unused) { return 0; }
 228
 229 static int
 230 eth_dev_close(struct rte_eth_dev *dev)
 231 {
 232         struct pmd_internals *internals = NULL;
 233         struct ring_queue *r = NULL;
 234         uint16_t i;
 235
 236         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 237                 return 0;
 238
 239         eth_dev_stop(dev);
 240
 241         internals = dev->data->dev_private;
 242         if (internals->action == DEV_CREATE) {
 243                 /*
 244                  * it is only necessary to delete the rings in rx_queues because
 245                  * they are the same used in tx_queues
 246                  */
 247                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 248                         r = dev->data->rx_queues[i];
 249                         rte_ring_free(r->rng);
 250                 }
 251         }
 252
 253         /* mac_addrs must not be freed alone because part of dev_private */
 254         dev->data->mac_addrs = NULL;
 255
 256         return 0;
 257 }
 258
 259 static const struct eth_dev_ops ops = {
 260         .dev_close = eth_dev_close,
 261         .dev_start = eth_dev_start,
 262         .dev_stop = eth_dev_stop,
 263         .dev_set_link_up = eth_dev_set_link_up,
 264         .dev_set_link_down = eth_dev_set_link_down,
 265         .dev_configure = eth_dev_configure,
 266         .dev_infos_get = eth_dev_info,
 267         .rx_queue_setup = eth_rx_queue_setup,
 268         .tx_queue_setup = eth_tx_queue_setup,
 269         .rx_queue_release = eth_queue_release,
 270         .tx_queue_release = eth_queue_release,
 271         .link_update = eth_link_update,
 272         .stats_get = eth_stats_get,
 273         .stats_reset = eth_stats_reset,
 274         .mac_addr_remove = eth_mac_addr_remove,
 275         .mac_addr_add = eth_mac_addr_add,
 276 };
 277
 278 static int
 279 do_eth_dev_ring_create(const char *name,
 280                 struct rte_vdev_device *vdev,
 281                 struct rte_ring * const rx_queues[],
 282                 const unsigned int nb_rx_queues,
 283                 struct rte_ring *const tx_queues[],
 284                 const unsigned int nb_tx_queues,
 285                 const unsigned int numa_node, enum dev_action action,
 286                 struct rte_eth_dev **eth_dev_p)
 287 {
 288         struct rte_eth_dev_data *data = NULL;
 289         struct pmd_internals *internals = NULL;
 290         struct rte_eth_dev *eth_dev = NULL;
 291         void **rx_queues_local = NULL;
 292         void **tx_queues_local = NULL;
 293         unsigned int i;
 294
 295         PMD_LOG(INFO, "Creating rings-backed ethdev on numa socket %u",
 296                         numa_node);
 297
 298         rx_queues_local = rte_calloc_socket(name, nb_rx_queues,
 299                                             sizeof(void *), 0, numa_node);
 300         if (rx_queues_local == NULL) {
 301                 rte_errno = ENOMEM;
 302                 goto error;
 303         }
 304
 305         tx_queues_local = rte_calloc_socket(name, nb_tx_queues,
 306                                             sizeof(void *), 0, numa_node);
 307         if (tx_queues_local == NULL) {
 308                 rte_errno = ENOMEM;
 309                 goto error;
 310         }
 311
 312         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 313         if (internals == NULL) {
 314                 rte_errno = ENOMEM;
 315                 goto error;
 316         }
 317
 318         /* reserve an ethdev entry */
 319         eth_dev = rte_eth_dev_allocate(name);
 320         if (eth_dev == NULL) {
 321                 rte_errno = ENOSPC;
 322                 goto error;
 323         }
 324
 325         /* now put it all together
 326          * - store EAL device in eth_dev,
 327          * - store queue data in internals,
 328          * - store numa_node info in eth_dev_data
 329          * - point eth_dev_data to internals
 330          * - and point eth_dev structure to new eth_dev_data structure
 331          */
 332
 333         eth_dev->device = &vdev->device;
 334
 335         data = eth_dev->data;
 336         data->rx_queues = rx_queues_local;
 337         data->tx_queues = tx_queues_local;
 338
 339         internals->action = action;
 340         internals->max_rx_queues = nb_rx_queues;
 341         internals->max_tx_queues = nb_tx_queues;
 342         for (i = 0; i < nb_rx_queues; i++) {
 343                 internals->rx_ring_queues[i].rng = rx_queues[i];
 344                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 345         }
 346         for (i = 0; i < nb_tx_queues; i++) {
 347                 internals->tx_ring_queues[i].rng = tx_queues[i];
 348                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 349         }
 350
 351         data->dev_private = internals;
 352         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 353         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 354         data->dev_link = pmd_link;
 355         data->mac_addrs = &internals->address;
 356         data->promiscuous = 1;
 357         data->all_multicast = 1;
 358
 359         eth_dev->dev_ops = &ops;
 360         data->numa_node = numa_node;
 361
 362         /* finally assign rx and tx ops */
 363         eth_dev->rx_pkt_burst = eth_ring_rx;
 364         eth_dev->tx_pkt_burst = eth_ring_tx;
 365
 366         rte_eth_dev_probing_finish(eth_dev);
 367         *eth_dev_p = eth_dev;
 368
 369         return data->port_id;
 370
 371 error:
 372         rte_free(rx_queues_local);
 373         rte_free(tx_queues_local);
 374         rte_free(internals);
 375
 376         return -1;
 377 }
 378
 379 int
 380 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 381                 const unsigned int nb_rx_queues,
 382                 struct rte_ring *const tx_queues[],
 383                 const unsigned int nb_tx_queues,
 384                 const unsigned int numa_node)
 385 {
 386         struct ring_internal_args args = {
 387                 .rx_queues = rx_queues,
 388                 .nb_rx_queues = nb_rx_queues,
 389                 .tx_queues = tx_queues,
 390                 .nb_tx_queues = nb_tx_queues,
 391                 .numa_node = numa_node,
 392                 .addr = &args,
 393         };
 394         char args_str[32];
 395         char ring_name[RTE_RING_NAMESIZE];
 396         uint16_t port_id = RTE_MAX_ETHPORTS;
 397         int ret;
 398
 399         /* do some parameter checking */
 400         if (rx_queues == NULL && nb_rx_queues > 0) {
 401                 rte_errno = EINVAL;
 402                 return -1;
 403         }
 404         if (tx_queues == NULL && nb_tx_queues > 0) {
 405                 rte_errno = EINVAL;
 406                 return -1;
 407         }
 408         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 409                 rte_errno = EINVAL;
 410                 return -1;
 411         }
 412
 413         snprintf(args_str, sizeof(args_str), "%s=%p",
 414                  ETH_RING_INTERNAL_ARG, &args);
 415
 416         ret = snprintf(ring_name, sizeof(ring_name), "net_ring_%s", name);
 417         if (ret >= (int)sizeof(ring_name)) {
 418                 rte_errno = ENAMETOOLONG;
 419                 return -1;
 420         }
 421
 422         ret = rte_vdev_init(ring_name, args_str);
 423         if (ret) {
 424                 rte_errno = EINVAL;
 425                 return -1;
 426         }
 427
 428         ret = rte_eth_dev_get_port_by_name(ring_name, &port_id);
 429         if (ret) {
 430                 rte_errno = ENODEV;
 431                 return -1;
 432         }
 433
 434         return port_id;
 435 }
 436
 437 int
 438 rte_eth_from_ring(struct rte_ring *r)
 439 {
 440         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 441                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 442 }
 443
 444 static int
 445 eth_dev_ring_create(const char *name,
 446                 struct rte_vdev_device *vdev,
 447                 const unsigned int numa_node,
 448                 enum dev_action action, struct rte_eth_dev **eth_dev)
 449 {
 450         /* rx and tx are so-called from point of view of first port.
 451          * They are inverted from the point of view of second port
 452          */
 453         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 454         unsigned int i;
 455         char rng_name[RTE_RING_NAMESIZE];
 456         unsigned int num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 457                         RTE_PMD_RING_MAX_TX_RINGS);
 458
 459         for (i = 0; i < num_rings; i++) {
 460                 int cc;
 461
 462                 cc = snprintf(rng_name, sizeof(rng_name),
 463                               "ETH_RXTX%u_%s", i, name);
 464                 if (cc >= (int)sizeof(rng_name)) {
 465                         rte_errno = ENAMETOOLONG;
 466                         return -1;
 467                 }
 468
 469                 rxtx[i] = (action == DEV_CREATE) ?
 470                                 rte_ring_create(rng_name, 1024, numa_node,
 471                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 472                                 rte_ring_lookup(rng_name);
 473                 if (rxtx[i] == NULL)
 474                         return -1;
 475         }
 476
 477         if (do_eth_dev_ring_create(name, vdev, rxtx, num_rings, rxtx, num_rings,
 478                 numa_node, action, eth_dev) < 0)
 479                 return -1;
 480
 481         return 0;
 482 }
 483
 484 struct node_action_pair {
 485         char name[PATH_MAX];
 486         unsigned int node;
 487         enum dev_action action;
 488 };
 489
 490 struct node_action_list {
 491         unsigned int total;
 492         unsigned int count;
 493         struct node_action_pair *list;
 494 };
 495
 496 static int parse_kvlist(const char *key __rte_unused,
 497                         const char *value, void *data)
 498 {
 499         struct node_action_list *info = data;
 500         int ret;
 501         char *name;
 502         char *action;
 503         char *node;
 504         char *end;
 505
 506         name = strdup(value);
 507
 508         ret = -EINVAL;
 509
 510         if (!name) {
 511                 PMD_LOG(WARNING, "command line parameter is empty for ring pmd!");
 512                 goto out;
 513         }
 514
 515         node = strchr(name, ':');
 516         if (!node) {
 517                 PMD_LOG(WARNING, "could not parse node value from %s",
 518                         name);
 519                 goto out;
 520         }
 521
 522         *node = '\0';
 523         node++;
 524
 525         action = strchr(node, ':');
 526         if (!action) {
 527                 PMD_LOG(WARNING, "could not parse action value from %s",
 528                         node);
 529                 goto out;
 530         }
 531
 532         *action = '\0';
 533         action++;
 534
 535         /*
 536          * Need to do some sanity checking here
 537          */
 538
 539         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 540                 info->list[info->count].action = DEV_ATTACH;
 541         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 542                 info->list[info->count].action = DEV_CREATE;
 543         else
 544                 goto out;
 545
 546         errno = 0;
 547         info->list[info->count].node = strtol(node, &end, 10);
 548
 549         if ((errno != 0) || (*end != '\0')) {
 550                 PMD_LOG(WARNING,
 551                         "node value %s is unparseable as a number", node);
 552                 goto out;
 553         }
 554
 555         strlcpy(info->list[info->count].name, name,
 556                 sizeof(info->list[info->count].name));
 557
 558         info->count++;
 559
 560         ret = 0;
 561 out:
 562         free(name);
 563         return ret;
 564 }
 565
 566 static int
 567 parse_internal_args(const char *key __rte_unused, const char *value,
 568                 void *data)
 569 {
 570         struct ring_internal_args **internal_args = data;
 571         void *args;
 572
 573         sscanf(value, "%p", &args);
 574
 575         *internal_args = args;
 576
 577         if ((*internal_args)->addr != args)
 578                 return -1;
 579
 580         return 0;
 581 }
 582
 583 static int
 584 rte_pmd_ring_probe(struct rte_vdev_device *dev)
 585 {
 586         const char *name, *params;
 587         struct rte_kvargs *kvlist = NULL;
 588         int ret = 0;
 589         struct node_action_list *info = NULL;
 590         struct rte_eth_dev *eth_dev = NULL;
 591         struct ring_internal_args *internal_args;
 592
 593         name = rte_vdev_device_name(dev);
 594         params = rte_vdev_device_args(dev);
 595
 596         PMD_LOG(INFO, "Initializing pmd_ring for %s", name);
 597
 598         if (params == NULL || params[0] == '\0') {
 599                 ret = eth_dev_ring_create(name, dev, rte_socket_id(), DEV_CREATE,
 600                                 &eth_dev);
 601                 if (ret == -1) {
 602                         PMD_LOG(INFO,
 603                                 "Attach to pmd_ring for %s", name);
 604                         ret = eth_dev_ring_create(name, dev, rte_socket_id(),
 605                                                   DEV_ATTACH, &eth_dev);
 606                 }
 607         } else {
 608                 kvlist = rte_kvargs_parse(params, valid_arguments);
 609
 610                 if (!kvlist) {
 611                         PMD_LOG(INFO,
 612                                 "Ignoring unsupported parameters when creatingrings-backed ethernet device");
 613                         ret = eth_dev_ring_create(name, dev, rte_socket_id(),
 614                                                   DEV_CREATE, &eth_dev);
 615                         if (ret == -1) {
 616                                 PMD_LOG(INFO,
 617                                         "Attach to pmd_ring for %s",
 618                                         name);
 619                                 ret = eth_dev_ring_create(name, dev, rte_socket_id(),
 620                                                           DEV_ATTACH, &eth_dev);
 621                         }
 622
 623                         return ret;
 624                 }
 625
 626                 if (rte_kvargs_count(kvlist, ETH_RING_INTERNAL_ARG) == 1) {
 627                         ret = rte_kvargs_process(kvlist, ETH_RING_INTERNAL_ARG,
 628                                                  parse_internal_args,
 629                                                  &internal_args);
 630                         if (ret < 0)
 631                                 goto out_free;
 632
 633                         ret = do_eth_dev_ring_create(name, dev,
 634                                 internal_args->rx_queues,
 635                                 internal_args->nb_rx_queues,
 636                                 internal_args->tx_queues,
 637                                 internal_args->nb_tx_queues,
 638                                 internal_args->numa_node,
 639                                 DEV_ATTACH,
 640                                 &eth_dev);
 641                         if (ret >= 0)
 642                                 ret = 0;
 643                 } else {
 644                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 645                         info = rte_zmalloc("struct node_action_list",
 646                                            sizeof(struct node_action_list) +
 647                                            (sizeof(struct node_action_pair) * ret),
 648                                            0);
 649                         if (!info)
 650                                 goto out_free;
 651
 652                         info->total = ret;
 653                         info->list = (struct node_action_pair *)(info + 1);
 654
 655                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 656                                                  parse_kvlist, info);
 657
 658                         if (ret < 0)
 659                                 goto out_free;
 660
 661                         for (info->count = 0; info->count < info->total; info->count++) {
 662                                 ret = eth_dev_ring_create(info->list[info->count].name,
 663                                                           dev,
 664                                                           info->list[info->count].node,
 665                                                           info->list[info->count].action,
 666                                                           &eth_dev);
 667                                 if ((ret == -1) &&
 668                                     (info->list[info->count].action == DEV_CREATE)) {
 669                                         PMD_LOG(INFO,
 670                                                 "Attach to pmd_ring for %s",
 671                                                 name);
 672                                         ret = eth_dev_ring_create(name, dev,
 673                                                         info->list[info->count].node,
 674                                                         DEV_ATTACH,
 675                                                         &eth_dev);
 676                                 }
 677                         }
 678                 }
 679         }
 680
 681 out_free:
 682         rte_kvargs_free(kvlist);
 683         rte_free(info);
 684         return ret;
 685 }
 686
 687 static int
 688 rte_pmd_ring_remove(struct rte_vdev_device *dev)
 689 {
 690         const char *name = rte_vdev_device_name(dev);
 691         struct rte_eth_dev *eth_dev = NULL;
 692
 693         PMD_LOG(INFO, "Un-Initializing pmd_ring for %s", name);
 694
 695         if (name == NULL)
 696                 return -EINVAL;
 697
 698         /* find an ethdev entry */
 699         eth_dev = rte_eth_dev_allocated(name);
 700         if (eth_dev == NULL)
 701                 return 0; /* port already released */
 702
 703         eth_dev_close(eth_dev);
 704         rte_eth_dev_release_port(eth_dev);
 705         return 0;
 706 }
 707
 708 static struct rte_vdev_driver pmd_ring_drv = {
 709         .probe = rte_pmd_ring_probe,
 710         .remove = rte_pmd_ring_remove,
 711 };
 712
 713 RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
 714 RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
 715 RTE_PMD_REGISTER_PARAM_STRING(net_ring,
 716         ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");