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