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 #define ETH_RING_INTERNAL_ARG_MAX_LEN   19 /* "0x..16chars..\0" */
  20
  21 static const char *valid_arguments[] = {
  22         ETH_RING_NUMA_NODE_ACTION_ARG,
  23         ETH_RING_INTERNAL_ARG,
  24         NULL
  25 };
  26
  27 struct ring_internal_args {
  28         struct rte_ring * const *rx_queues;
  29         const unsigned int nb_rx_queues;
  30         struct rte_ring * const *tx_queues;
  31         const unsigned int nb_tx_queues;
  32         const unsigned int numa_node;
  33         void *addr; /* self addr for sanity check */
  34 };
  35
  36 enum dev_action {
  37         DEV_CREATE,
  38         DEV_ATTACH
  39 };
  40
  41 struct ring_queue {
  42         struct rte_ring *rng;
  43         rte_atomic64_t rx_pkts;
  44         rte_atomic64_t tx_pkts;
  45 };
  46
  47 struct pmd_internals {
  48         unsigned int max_rx_queues;
  49         unsigned int 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 rte_ether_addr address;
  55         enum dev_action action;
  56 };
  57
  58 static struct rte_eth_link pmd_link = {
  59         .link_speed = ETH_SPEED_NUM_10G,
  60         .link_duplex = ETH_LINK_FULL_DUPLEX,
  61         .link_status = ETH_LINK_DOWN,
  62         .link_autoneg = ETH_LINK_FIXED,
  63 };
  64
  65 RTE_LOG_REGISTER(eth_ring_logtype, pmd.net.ring, NOTICE);
  66
  67 #define PMD_LOG(level, fmt, args...) \
  68         rte_log(RTE_LOG_ ## level, eth_ring_logtype, \
  69                 "%s(): " fmt "\n", __func__, ##args)
  70
  71 static uint16_t
  72 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  73 {
  74         void **ptrs = (void *)&bufs[0];
  75         struct ring_queue *r = q;
  76         const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
  77                         ptrs, nb_bufs, NULL);
  78         if (r->rng->flags & RING_F_SC_DEQ)
  79                 r->rx_pkts.cnt += nb_rx;
  80         else
  81                 rte_atomic64_add(&(r->rx_pkts), nb_rx);
  82         return nb_rx;
  83 }
  84
  85 static uint16_t
  86 eth_ring_tx(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_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
  91                         ptrs, nb_bufs, NULL);
  92         if (r->rng->flags & RING_F_SP_ENQ)
  93                 r->tx_pkts.cnt += nb_tx;
  94         else
  95                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
  96         return nb_tx;
  97 }
  98
  99 static int
 100 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
 101
 102 static int
 103 eth_dev_start(struct rte_eth_dev *dev)
 104 {
 105         dev->data->dev_link.link_status = ETH_LINK_UP;
 106         return 0;
 107 }
 108
 109 static void
 110 eth_dev_stop(struct rte_eth_dev *dev)
 111 {
 112         dev->data->dev_started = 0;
 113         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 114 }
 115
 116 static int
 117 eth_dev_set_link_down(struct rte_eth_dev *dev)
 118 {
 119         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 120         return 0;
 121 }
 122
 123 static int
 124 eth_dev_set_link_up(struct rte_eth_dev *dev)
 125 {
 126         dev->data->dev_link.link_status = ETH_LINK_UP;
 127         return 0;
 128 }
 129
 130 static int
 131 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 132                                     uint16_t nb_rx_desc __rte_unused,
 133                                     unsigned int socket_id __rte_unused,
 134                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
 135                                     struct rte_mempool *mb_pool __rte_unused)
 136 {
 137         struct pmd_internals *internals = dev->data->dev_private;
 138
 139         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
 140         return 0;
 141 }
 142
 143 static int
 144 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 145                                     uint16_t nb_tx_desc __rte_unused,
 146                                     unsigned int socket_id __rte_unused,
 147                                     const struct rte_eth_txconf *tx_conf __rte_unused)
 148 {
 149         struct pmd_internals *internals = dev->data->dev_private;
 150
 151         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
 152         return 0;
 153 }
 154
 155
 156 static int
 157 eth_dev_info(struct rte_eth_dev *dev,
 158              struct rte_eth_dev_info *dev_info)
 159 {
 160         struct pmd_internals *internals = dev->data->dev_private;
 161
 162         dev_info->max_mac_addrs = 1;
 163         dev_info->max_rx_pktlen = (uint32_t)-1;
 164         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
 165         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_SCATTER;
 166         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS;
 167         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
 168         dev_info->min_rx_bufsize = 0;
 169
 170         return 0;
 171 }
 172
 173 static int
 174 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 175 {
 176         unsigned int i;
 177         unsigned long rx_total = 0, tx_total = 0;
 178         const struct pmd_internals *internal = dev->data->dev_private;
 179
 180         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 181                         i < dev->data->nb_rx_queues; i++) {
 182                 stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
 183                 rx_total += stats->q_ipackets[i];
 184         }
 185
 186         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 187                         i < dev->data->nb_tx_queues; i++) {
 188                 stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
 189                 tx_total += stats->q_opackets[i];
 190         }
 191
 192         stats->ipackets = rx_total;
 193         stats->opackets = tx_total;
 194
 195         return 0;
 196 }
 197
 198 static int
 199 eth_stats_reset(struct rte_eth_dev *dev)
 200 {
 201         unsigned int i;
 202         struct pmd_internals *internal = dev->data->dev_private;
 203
 204         for (i = 0; i < dev->data->nb_rx_queues; i++)
 205                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 206         for (i = 0; i < dev->data->nb_tx_queues; i++)
 207                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 208
 209         return 0;
 210 }
 211
 212 static void
 213 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 214         uint32_t index __rte_unused)
 215 {
 216 }
 217
 218 static int
 219 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 220         struct rte_ether_addr *mac_addr __rte_unused,
 221         uint32_t index __rte_unused,
 222         uint32_t vmdq __rte_unused)
 223 {
 224         return 0;
 225 }
 226
 227 static void
 228 eth_queue_release(void *q __rte_unused) { ; }
 229 static int
 230 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 231                 int wait_to_complete __rte_unused) { return 0; }
 232
 233 static int
 234 eth_dev_close(struct rte_eth_dev *dev)
 235 {
 236         struct pmd_internals *internals = NULL;
 237         struct ring_queue *r = NULL;
 238         uint16_t i;
 239
 240         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 241                 return 0;
 242
 243         eth_dev_stop(dev);
 244
 245         internals = dev->data->dev_private;
 246         if (internals->action == DEV_CREATE) {
 247                 /*
 248                  * it is only necessary to delete the rings in rx_queues because
 249                  * they are the same used in tx_queues
 250                  */
 251                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 252                         r = dev->data->rx_queues[i];
 253                         rte_ring_free(r->rng);
 254                 }
 255         }
 256
 257         /* mac_addrs must not be freed alone because part of dev_private */
 258         dev->data->mac_addrs = NULL;
 259
 260         return 0;
 261 }
 262
 263 static const struct eth_dev_ops ops = {
 264         .dev_close = eth_dev_close,
 265         .dev_start = eth_dev_start,
 266         .dev_stop = eth_dev_stop,
 267         .dev_set_link_up = eth_dev_set_link_up,
 268         .dev_set_link_down = eth_dev_set_link_down,
 269         .dev_configure = eth_dev_configure,
 270         .dev_infos_get = eth_dev_info,
 271         .rx_queue_setup = eth_rx_queue_setup,
 272         .tx_queue_setup = eth_tx_queue_setup,
 273         .rx_queue_release = eth_queue_release,
 274         .tx_queue_release = eth_queue_release,
 275         .link_update = eth_link_update,
 276         .stats_get = eth_stats_get,
 277         .stats_reset = eth_stats_reset,
 278         .mac_addr_remove = eth_mac_addr_remove,
 279         .mac_addr_add = eth_mac_addr_add,
 280 };
 281
 282 static int
 283 do_eth_dev_ring_create(const char *name,
 284                 struct rte_vdev_device *vdev,
 285                 struct rte_ring * const rx_queues[],
 286                 const unsigned int nb_rx_queues,
 287                 struct rte_ring *const tx_queues[],
 288                 const unsigned int nb_tx_queues,
 289                 const unsigned int numa_node, enum dev_action action,
 290                 struct rte_eth_dev **eth_dev_p)
 291 {
 292         struct rte_eth_dev_data *data = NULL;
 293         struct pmd_internals *internals = NULL;
 294         struct rte_eth_dev *eth_dev = NULL;
 295         void **rx_queues_local = NULL;
 296         void **tx_queues_local = NULL;
 297         unsigned int i;
 298
 299         PMD_LOG(INFO, "Creating rings-backed ethdev on numa socket %u",
 300                         numa_node);
 301
 302         rx_queues_local = rte_calloc_socket(name, nb_rx_queues,
 303                                             sizeof(void *), 0, numa_node);
 304         if (rx_queues_local == NULL) {
 305                 rte_errno = ENOMEM;
 306                 goto error;
 307         }
 308
 309         tx_queues_local = rte_calloc_socket(name, nb_tx_queues,
 310                                             sizeof(void *), 0, numa_node);
 311         if (tx_queues_local == NULL) {
 312                 rte_errno = ENOMEM;
 313                 goto error;
 314         }
 315
 316         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 317         if (internals == NULL) {
 318                 rte_errno = ENOMEM;
 319                 goto error;
 320         }
 321
 322         /* reserve an ethdev entry */
 323         eth_dev = rte_eth_dev_allocate(name);
 324         if (eth_dev == NULL) {
 325                 rte_errno = ENOSPC;
 326                 goto error;
 327         }
 328
 329         /* now put it all together
 330          * - store EAL device in eth_dev,
 331          * - store queue data in internals,
 332          * - store numa_node info in eth_dev_data
 333          * - point eth_dev_data to internals
 334          * - and point eth_dev structure to new eth_dev_data structure
 335          */
 336
 337         eth_dev->device = &vdev->device;
 338
 339         data = eth_dev->data;
 340         data->rx_queues = rx_queues_local;
 341         data->tx_queues = tx_queues_local;
 342
 343         internals->action = action;
 344         internals->max_rx_queues = nb_rx_queues;
 345         internals->max_tx_queues = nb_tx_queues;
 346         for (i = 0; i < nb_rx_queues; i++) {
 347                 internals->rx_ring_queues[i].rng = rx_queues[i];
 348                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 349         }
 350         for (i = 0; i < nb_tx_queues; i++) {
 351                 internals->tx_ring_queues[i].rng = tx_queues[i];
 352                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 353         }
 354
 355         data->dev_private = internals;
 356         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 357         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 358         data->dev_link = pmd_link;
 359         data->mac_addrs = &internals->address;
 360         data->promiscuous = 1;
 361         data->all_multicast = 1;
 362
 363         eth_dev->dev_ops = &ops;
 364         data->numa_node = numa_node;
 365
 366         /* finally assign rx and tx ops */
 367         eth_dev->rx_pkt_burst = eth_ring_rx;
 368         eth_dev->tx_pkt_burst = eth_ring_tx;
 369
 370         rte_eth_dev_probing_finish(eth_dev);
 371         *eth_dev_p = eth_dev;
 372
 373         return data->port_id;
 374
 375 error:
 376         rte_free(rx_queues_local);
 377         rte_free(tx_queues_local);
 378         rte_free(internals);
 379
 380         return -1;
 381 }
 382
 383 int
 384 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 385                 const unsigned int nb_rx_queues,
 386                 struct rte_ring *const tx_queues[],
 387                 const unsigned int nb_tx_queues,
 388                 const unsigned int numa_node)
 389 {
 390         struct ring_internal_args args = {
 391                 .rx_queues = rx_queues,
 392                 .nb_rx_queues = nb_rx_queues,
 393                 .tx_queues = tx_queues,
 394                 .nb_tx_queues = nb_tx_queues,
 395                 .numa_node = numa_node,
 396                 .addr = &args,
 397         };
 398         char args_str[32];
 399         char ring_name[RTE_RING_NAMESIZE];
 400         uint16_t port_id = RTE_MAX_ETHPORTS;
 401         int ret;
 402
 403         /* do some parameter checking */
 404         if (rx_queues == NULL && nb_rx_queues > 0) {
 405                 rte_errno = EINVAL;
 406                 return -1;
 407         }
 408         if (tx_queues == NULL && nb_tx_queues > 0) {
 409                 rte_errno = EINVAL;
 410                 return -1;
 411         }
 412         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 413                 rte_errno = EINVAL;
 414                 return -1;
 415         }
 416
 417         snprintf(args_str, sizeof(args_str), "%s=%p",
 418                  ETH_RING_INTERNAL_ARG, &args);
 419
 420         ret = snprintf(ring_name, sizeof(ring_name), "net_ring_%s", name);
 421         if (ret >= (int)sizeof(ring_name)) {
 422                 rte_errno = ENAMETOOLONG;
 423                 return -1;
 424         }
 425
 426         ret = rte_vdev_init(ring_name, args_str);
 427         if (ret) {
 428                 rte_errno = EINVAL;
 429                 return -1;
 430         }
 431
 432         ret = rte_eth_dev_get_port_by_name(ring_name, &port_id);
 433         if (ret) {
 434                 rte_errno = ENODEV;
 435                 return -1;
 436         }
 437
 438         return port_id;
 439 }
 440
 441 int
 442 rte_eth_from_ring(struct rte_ring *r)
 443 {
 444         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 445                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 446 }
 447
 448 static int
 449 eth_dev_ring_create(const char *name,
 450                 struct rte_vdev_device *vdev,
 451                 const unsigned int numa_node,
 452                 enum dev_action action, struct rte_eth_dev **eth_dev)
 453 {
 454         /* rx and tx are so-called from point of view of first port.
 455          * They are inverted from the point of view of second port
 456          */
 457         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 458         unsigned int i;
 459         char rng_name[RTE_RING_NAMESIZE];
 460         unsigned int num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 461                         RTE_PMD_RING_MAX_TX_RINGS);
 462
 463         for (i = 0; i < num_rings; i++) {
 464                 int cc;
 465
 466                 cc = snprintf(rng_name, sizeof(rng_name),
 467                               "ETH_RXTX%u_%s", i, name);
 468                 if (cc >= (int)sizeof(rng_name)) {
 469                         rte_errno = ENAMETOOLONG;
 470                         return -1;
 471                 }
 472
 473                 rxtx[i] = (action == DEV_CREATE) ?
 474                                 rte_ring_create(rng_name, 1024, numa_node,
 475                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 476                                 rte_ring_lookup(rng_name);
 477                 if (rxtx[i] == NULL)
 478                         return -1;
 479         }
 480
 481         if (do_eth_dev_ring_create(name, vdev, rxtx, num_rings, rxtx, num_rings,
 482                 numa_node, action, eth_dev) < 0)
 483                 return -1;
 484
 485         return 0;
 486 }
 487
 488 struct node_action_pair {
 489         char name[PATH_MAX];
 490         unsigned int node;
 491         enum dev_action action;
 492 };
 493
 494 struct node_action_list {
 495         unsigned int total;
 496         unsigned int count;
 497         struct node_action_pair *list;
 498 };
 499
 500 static int parse_kvlist(const char *key __rte_unused,
 501                         const char *value, void *data)
 502 {
 503         struct node_action_list *info = data;
 504         int ret;
 505         char *name;
 506         char *action;
 507         char *node;
 508         char *end;
 509
 510         name = strdup(value);
 511
 512         ret = -EINVAL;
 513
 514         if (!name) {
 515                 PMD_LOG(WARNING, "command line parameter is empty for ring pmd!");
 516                 goto out;
 517         }
 518
 519         node = strchr(name, ':');
 520         if (!node) {
 521                 PMD_LOG(WARNING, "could not parse node value from %s",
 522                         name);
 523                 goto out;
 524         }
 525
 526         *node = '\0';
 527         node++;
 528
 529         action = strchr(node, ':');
 530         if (!action) {
 531                 PMD_LOG(WARNING, "could not parse action value from %s",
 532                         node);
 533                 goto out;
 534         }
 535
 536         *action = '\0';
 537         action++;
 538
 539         /*
 540          * Need to do some sanity checking here
 541          */
 542
 543         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 544                 info->list[info->count].action = DEV_ATTACH;
 545         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 546                 info->list[info->count].action = DEV_CREATE;
 547         else
 548                 goto out;
 549
 550         errno = 0;
 551         info->list[info->count].node = strtol(node, &end, 10);
 552
 553         if ((errno != 0) || (*end != '\0')) {
 554                 PMD_LOG(WARNING,
 555                         "node value %s is unparseable as a number", node);
 556                 goto out;
 557         }
 558
 559         strlcpy(info->list[info->count].name, name,
 560                 sizeof(info->list[info->count].name));
 561
 562         info->count++;
 563
 564         ret = 0;
 565 out:
 566         free(name);
 567         return ret;
 568 }
 569
 570 static int
 571 parse_internal_args(const char *key __rte_unused, const char *value,
 572                 void *data)
 573 {
 574         struct ring_internal_args **internal_args = data;
 575         void *args;
 576         int ret, n;
 577
 578         /* make sure 'value' is valid pointer length */
 579         if (strnlen(value, ETH_RING_INTERNAL_ARG_MAX_LEN) >=
 580                         ETH_RING_INTERNAL_ARG_MAX_LEN) {
 581                 PMD_LOG(ERR, "Error parsing internal args, argument is too long");
 582                 return -1;
 583         }
 584
 585         ret = sscanf(value, "%p%n", &args, &n);
 586         if (ret == 0 || (size_t)n != strlen(value)) {
 587                 PMD_LOG(ERR, "Error parsing internal args");
 588
 589                 return -1;
 590         }
 591
 592         *internal_args = args;
 593
 594         if ((*internal_args)->addr != args)
 595                 return -1;
 596
 597         return 0;
 598 }
 599
 600 static int
 601 rte_pmd_ring_probe(struct rte_vdev_device *dev)
 602 {
 603         const char *name, *params;
 604         struct rte_kvargs *kvlist = NULL;
 605         int ret = 0;
 606         struct node_action_list *info = NULL;
 607         struct rte_eth_dev *eth_dev = NULL;
 608         struct ring_internal_args *internal_args;
 609
 610         name = rte_vdev_device_name(dev);
 611         params = rte_vdev_device_args(dev);
 612
 613         PMD_LOG(INFO, "Initializing pmd_ring for %s", name);
 614
 615         if (params == NULL || params[0] == '\0') {
 616                 ret = eth_dev_ring_create(name, dev, rte_socket_id(), DEV_CREATE,
 617                                 &eth_dev);
 618                 if (ret == -1) {
 619                         PMD_LOG(INFO,
 620                                 "Attach to pmd_ring for %s", name);
 621                         ret = eth_dev_ring_create(name, dev, rte_socket_id(),
 622                                                   DEV_ATTACH, &eth_dev);
 623                 }
 624         } else {
 625                 kvlist = rte_kvargs_parse(params, valid_arguments);
 626
 627                 if (!kvlist) {
 628                         PMD_LOG(INFO,
 629                                 "Ignoring unsupported parameters when creatingrings-backed ethernet device");
 630                         ret = eth_dev_ring_create(name, dev, rte_socket_id(),
 631                                                   DEV_CREATE, &eth_dev);
 632                         if (ret == -1) {
 633                                 PMD_LOG(INFO,
 634                                         "Attach to pmd_ring for %s",
 635                                         name);
 636                                 ret = eth_dev_ring_create(name, dev, rte_socket_id(),
 637                                                           DEV_ATTACH, &eth_dev);
 638                         }
 639
 640                         return ret;
 641                 }
 642
 643                 if (rte_kvargs_count(kvlist, ETH_RING_INTERNAL_ARG) == 1) {
 644                         ret = rte_kvargs_process(kvlist, ETH_RING_INTERNAL_ARG,
 645                                                  parse_internal_args,
 646                                                  &internal_args);
 647                         if (ret < 0)
 648                                 goto out_free;
 649
 650                         ret = do_eth_dev_ring_create(name, dev,
 651                                 internal_args->rx_queues,
 652                                 internal_args->nb_rx_queues,
 653                                 internal_args->tx_queues,
 654                                 internal_args->nb_tx_queues,
 655                                 internal_args->numa_node,
 656                                 DEV_ATTACH,
 657                                 &eth_dev);
 658                         if (ret >= 0)
 659                                 ret = 0;
 660                 } else {
 661                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 662                         info = rte_zmalloc("struct node_action_list",
 663                                            sizeof(struct node_action_list) +
 664                                            (sizeof(struct node_action_pair) * ret),
 665                                            0);
 666                         if (!info)
 667                                 goto out_free;
 668
 669                         info->total = ret;
 670                         info->list = (struct node_action_pair *)(info + 1);
 671
 672                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 673                                                  parse_kvlist, info);
 674
 675                         if (ret < 0)
 676                                 goto out_free;
 677
 678                         for (info->count = 0; info->count < info->total; info->count++) {
 679                                 ret = eth_dev_ring_create(info->list[info->count].name,
 680                                                           dev,
 681                                                           info->list[info->count].node,
 682                                                           info->list[info->count].action,
 683                                                           &eth_dev);
 684                                 if ((ret == -1) &&
 685                                     (info->list[info->count].action == DEV_CREATE)) {
 686                                         PMD_LOG(INFO,
 687                                                 "Attach to pmd_ring for %s",
 688                                                 name);
 689                                         ret = eth_dev_ring_create(name, dev,
 690                                                         info->list[info->count].node,
 691                                                         DEV_ATTACH,
 692                                                         &eth_dev);
 693                                 }
 694                         }
 695                 }
 696         }
 697
 698 out_free:
 699         rte_kvargs_free(kvlist);
 700         rte_free(info);
 701         return ret;
 702 }
 703
 704 static int
 705 rte_pmd_ring_remove(struct rte_vdev_device *dev)
 706 {
 707         const char *name = rte_vdev_device_name(dev);
 708         struct rte_eth_dev *eth_dev = NULL;
 709
 710         PMD_LOG(INFO, "Un-Initializing pmd_ring for %s", name);
 711
 712         if (name == NULL)
 713                 return -EINVAL;
 714
 715         /* find an ethdev entry */
 716         eth_dev = rte_eth_dev_allocated(name);
 717         if (eth_dev == NULL)
 718                 return 0; /* port already released */
 719
 720         eth_dev_close(eth_dev);
 721         rte_eth_dev_release_port(eth_dev);
 722         return 0;
 723 }
 724
 725 static struct rte_vdev_driver pmd_ring_drv = {
 726         .probe = rte_pmd_ring_probe,
 727         .remove = rte_pmd_ring_remove,
 728 };
 729
 730 RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
 731 RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
 732 RTE_PMD_REGISTER_PARAM_STRING(net_ring,
 733         ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");