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