ceph/src/seastar/dpdk/drivers/net/ring/rte_eth_ring.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2015 Intel Corporation
   3  */
   4
   5 #include "rte_eth_ring.h"
   6 #include <rte_mbuf.h>
   7 #include <rte_ethdev_driver.h>
   8 #include <rte_malloc.h>
   9 #include <rte_memcpy.h>
  10 #include <rte_string_fns.h>
  11 #include <rte_bus_vdev.h>
  12 #include <rte_kvargs.h>
  13 #include <rte_errno.h>
  14
  15 #define ETH_RING_NUMA_NODE_ACTION_ARG   "nodeaction"
  16 #define ETH_RING_ACTION_CREATE          "CREATE"
  17 #define ETH_RING_ACTION_ATTACH          "ATTACH"
  18 #define ETH_RING_INTERNAL_ARG           "internal"
  19
  20 static const char *valid_arguments[] = {
  21         ETH_RING_NUMA_NODE_ACTION_ARG,
  22         ETH_RING_INTERNAL_ARG,
  23         NULL
  24 };
  25
  26 struct ring_internal_args {
  27         struct rte_ring * const *rx_queues;
  28         const unsigned int nb_rx_queues;
  29         struct rte_ring * const *tx_queues;
  30         const unsigned int nb_tx_queues;
  31         const unsigned int numa_node;
  32         void *addr; /* self addr for sanity check */
  33 };
  34
  35 enum dev_action {
  36         DEV_CREATE,
  37         DEV_ATTACH
  38 };
  39
  40 struct ring_queue {
  41         struct rte_ring *rng;
  42         rte_atomic64_t rx_pkts;
  43         rte_atomic64_t tx_pkts;
  44         rte_atomic64_t err_pkts;
  45 };
  46
  47 struct pmd_internals {
  48         unsigned 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 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 static int eth_ring_logtype;
  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                 r->err_pkts.cnt += nb_bufs - nb_tx;
  95         } else {
  96                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
  97                 rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
  98         }
  99         return nb_tx;
 100 }
 101
 102 static int
 103 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
 104
 105 static int
 106 eth_dev_start(struct rte_eth_dev *dev)
 107 {
 108         dev->data->dev_link.link_status = ETH_LINK_UP;
 109         return 0;
 110 }
 111
 112 static void
 113 eth_dev_stop(struct rte_eth_dev *dev)
 114 {
 115         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 116 }
 117
 118 static int
 119 eth_dev_set_link_down(struct rte_eth_dev *dev)
 120 {
 121         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 122         return 0;
 123 }
 124
 125 static int
 126 eth_dev_set_link_up(struct rte_eth_dev *dev)
 127 {
 128         dev->data->dev_link.link_status = ETH_LINK_UP;
 129         return 0;
 130 }
 131
 132 static int
 133 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 134                                     uint16_t nb_rx_desc __rte_unused,
 135                                     unsigned int socket_id __rte_unused,
 136                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
 137                                     struct rte_mempool *mb_pool __rte_unused)
 138 {
 139         struct pmd_internals *internals = dev->data->dev_private;
 140
 141         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
 142         return 0;
 143 }
 144
 145 static int
 146 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 147                                     uint16_t nb_tx_desc __rte_unused,
 148                                     unsigned int socket_id __rte_unused,
 149                                     const struct rte_eth_txconf *tx_conf __rte_unused)
 150 {
 151         struct pmd_internals *internals = dev->data->dev_private;
 152
 153         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
 154         return 0;
 155 }
 156
 157
 158 static void
 159 eth_dev_info(struct rte_eth_dev *dev,
 160              struct rte_eth_dev_info *dev_info)
 161 {
 162         struct pmd_internals *internals = dev->data->dev_private;
 163
 164         dev_info->max_mac_addrs = 1;
 165         dev_info->max_rx_pktlen = (uint32_t)-1;
 166         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
 167         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
 168         dev_info->min_rx_bufsize = 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, tx_err_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                 stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
 188                 tx_total += stats->q_opackets[i];
 189                 tx_err_total += stats->q_errors[i];
 190         }
 191
 192         stats->ipackets = rx_total;
 193         stats->opackets = tx_total;
 194         stats->oerrors = tx_err_total;
 195
 196         return 0;
 197 }
 198
 199 static void
 200 eth_stats_reset(struct rte_eth_dev *dev)
 201 {
 202         unsigned int i;
 203         struct pmd_internals *internal = dev->data->dev_private;
 204
 205         for (i = 0; i < dev->data->nb_rx_queues; i++)
 206                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 207         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 208                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 209                 internal->tx_ring_queues[i].err_pkts.cnt = 0;
 210         }
 211 }
 212
 213 static void
 214 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 215         uint32_t index __rte_unused)
 216 {
 217 }
 218
 219 static int
 220 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 221         struct ether_addr *mac_addr __rte_unused,
 222         uint32_t index __rte_unused,
 223         uint32_t vmdq __rte_unused)
 224 {
 225         return 0;
 226 }
 227
 228 static void
 229 eth_queue_release(void *q __rte_unused) { ; }
 230 static int
 231 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 232                 int wait_to_complete __rte_unused) { return 0; }
 233
 234 static const struct eth_dev_ops ops = {
 235         .dev_start = eth_dev_start,
 236         .dev_stop = eth_dev_stop,
 237         .dev_set_link_up = eth_dev_set_link_up,
 238         .dev_set_link_down = eth_dev_set_link_down,
 239         .dev_configure = eth_dev_configure,
 240         .dev_infos_get = eth_dev_info,
 241         .rx_queue_setup = eth_rx_queue_setup,
 242         .tx_queue_setup = eth_tx_queue_setup,
 243         .rx_queue_release = eth_queue_release,
 244         .tx_queue_release = eth_queue_release,
 245         .link_update = eth_link_update,
 246         .stats_get = eth_stats_get,
 247         .stats_reset = eth_stats_reset,
 248         .mac_addr_remove = eth_mac_addr_remove,
 249         .mac_addr_add = eth_mac_addr_add,
 250 };
 251
 252 static struct rte_vdev_driver pmd_ring_drv;
 253
 254 static int
 255 do_eth_dev_ring_create(const char *name,
 256                 struct rte_ring * const rx_queues[],
 257                 const unsigned int nb_rx_queues,
 258                 struct rte_ring *const tx_queues[],
 259                 const unsigned int nb_tx_queues,
 260                 const unsigned int numa_node, enum dev_action action,
 261                 struct rte_eth_dev **eth_dev_p)
 262 {
 263         struct rte_eth_dev_data *data = NULL;
 264         struct pmd_internals *internals = NULL;
 265         struct rte_eth_dev *eth_dev = NULL;
 266         void **rx_queues_local = NULL;
 267         void **tx_queues_local = NULL;
 268         unsigned int i;
 269
 270         PMD_LOG(INFO, "Creating rings-backed ethdev on numa socket %u",
 271                         numa_node);
 272
 273         rx_queues_local = rte_calloc_socket(name, nb_rx_queues,
 274                                             sizeof(void *), 0, numa_node);
 275         if (rx_queues_local == NULL) {
 276                 rte_errno = ENOMEM;
 277                 goto error;
 278         }
 279
 280         tx_queues_local = rte_calloc_socket(name, nb_tx_queues,
 281                                             sizeof(void *), 0, numa_node);
 282         if (tx_queues_local == NULL) {
 283                 rte_errno = ENOMEM;
 284                 goto error;
 285         }
 286
 287         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 288         if (internals == NULL) {
 289                 rte_errno = ENOMEM;
 290                 goto error;
 291         }
 292
 293         /* reserve an ethdev entry */
 294         eth_dev = rte_eth_dev_allocate(name);
 295         if (eth_dev == NULL) {
 296                 rte_errno = ENOSPC;
 297                 goto error;
 298         }
 299
 300         /* now put it all together
 301          * - store queue data in internals,
 302          * - store numa_node info in eth_dev_data
 303          * - point eth_dev_data to internals
 304          * - and point eth_dev structure to new eth_dev_data structure
 305          */
 306
 307         data = eth_dev->data;
 308         data->rx_queues = rx_queues_local;
 309         data->tx_queues = tx_queues_local;
 310
 311         internals->action = action;
 312         internals->max_rx_queues = nb_rx_queues;
 313         internals->max_tx_queues = nb_tx_queues;
 314         for (i = 0; i < nb_rx_queues; i++) {
 315                 internals->rx_ring_queues[i].rng = rx_queues[i];
 316                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 317         }
 318         for (i = 0; i < nb_tx_queues; i++) {
 319                 internals->tx_ring_queues[i].rng = tx_queues[i];
 320                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 321         }
 322
 323         data->dev_private = internals;
 324         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 325         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 326         data->dev_link = pmd_link;
 327         data->mac_addrs = &internals->address;
 328
 329         eth_dev->dev_ops = &ops;
 330         data->kdrv = RTE_KDRV_NONE;
 331         data->numa_node = numa_node;
 332
 333         /* finally assign rx and tx ops */
 334         eth_dev->rx_pkt_burst = eth_ring_rx;
 335         eth_dev->tx_pkt_burst = eth_ring_tx;
 336
 337         rte_eth_dev_probing_finish(eth_dev);
 338         *eth_dev_p = eth_dev;
 339
 340         return data->port_id;
 341
 342 error:
 343         rte_free(rx_queues_local);
 344         rte_free(tx_queues_local);
 345         rte_free(internals);
 346
 347         return -1;
 348 }
 349
 350 int
 351 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 352                 const unsigned int nb_rx_queues,
 353                 struct rte_ring *const tx_queues[],
 354                 const unsigned int nb_tx_queues,
 355                 const unsigned int numa_node)
 356 {
 357         struct ring_internal_args args = {
 358                 .rx_queues = rx_queues,
 359                 .nb_rx_queues = nb_rx_queues,
 360                 .tx_queues = tx_queues,
 361                 .nb_tx_queues = nb_tx_queues,
 362                 .numa_node = numa_node,
 363                 .addr = &args,
 364         };
 365         char args_str[32];
 366         char ring_name[RTE_RING_NAMESIZE];
 367         uint16_t port_id = RTE_MAX_ETHPORTS;
 368         int ret;
 369
 370         /* do some parameter checking */
 371         if (rx_queues == NULL && nb_rx_queues > 0) {
 372                 rte_errno = EINVAL;
 373                 return -1;
 374         }
 375         if (tx_queues == NULL && nb_tx_queues > 0) {
 376                 rte_errno = EINVAL;
 377                 return -1;
 378         }
 379         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 380                 rte_errno = EINVAL;
 381                 return -1;
 382         }
 383
 384         snprintf(args_str, sizeof(args_str), "%s=%p",
 385                  ETH_RING_INTERNAL_ARG, &args);
 386
 387         ret = snprintf(ring_name, sizeof(ring_name), "net_ring_%s", name);
 388         if (ret >= (int)sizeof(ring_name)) {
 389                 rte_errno = ENAMETOOLONG;
 390                 return -1;
 391         }
 392
 393         ret = rte_vdev_init(ring_name, args_str);
 394         if (ret) {
 395                 rte_errno = EINVAL;
 396                 return -1;
 397         }
 398
 399         ret = rte_eth_dev_get_port_by_name(ring_name, &port_id);
 400         if (ret) {
 401                 rte_errno = ENODEV;
 402                 return -1;
 403         }
 404
 405         return port_id;
 406 }
 407
 408 int
 409 rte_eth_from_ring(struct rte_ring *r)
 410 {
 411         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 412                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 413 }
 414
 415 static int
 416 eth_dev_ring_create(const char *name, const unsigned int numa_node,
 417                 enum dev_action action, struct rte_eth_dev **eth_dev)
 418 {
 419         /* rx and tx are so-called from point of view of first port.
 420          * They are inverted from the point of view of second port
 421          */
 422         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 423         unsigned int i;
 424         char rng_name[RTE_RING_NAMESIZE];
 425         unsigned int num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 426                         RTE_PMD_RING_MAX_TX_RINGS);
 427
 428         for (i = 0; i < num_rings; i++) {
 429                 int cc;
 430
 431                 cc = snprintf(rng_name, sizeof(rng_name),
 432                               "ETH_RXTX%u_%s", i, name);
 433                 if (cc >= (int)sizeof(rng_name)) {
 434                         rte_errno = ENAMETOOLONG;
 435                         return -1;
 436                 }
 437
 438                 rxtx[i] = (action == DEV_CREATE) ?
 439                                 rte_ring_create(rng_name, 1024, numa_node,
 440                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 441                                 rte_ring_lookup(rng_name);
 442                 if (rxtx[i] == NULL)
 443                         return -1;
 444         }
 445
 446         if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
 447                 numa_node, action, eth_dev) < 0)
 448                 return -1;
 449
 450         return 0;
 451 }
 452
 453 struct node_action_pair {
 454         char name[PATH_MAX];
 455         unsigned int node;
 456         enum dev_action action;
 457 };
 458
 459 struct node_action_list {
 460         unsigned int total;
 461         unsigned int count;
 462         struct node_action_pair *list;
 463 };
 464
 465 static int parse_kvlist(const char *key __rte_unused,
 466                         const char *value, void *data)
 467 {
 468         struct node_action_list *info = data;
 469         int ret;
 470         char *name;
 471         char *action;
 472         char *node;
 473         char *end;
 474
 475         name = strdup(value);
 476
 477         ret = -EINVAL;
 478
 479         if (!name) {
 480                 PMD_LOG(WARNING, "command line parameter is empty for ring pmd!");
 481                 goto out;
 482         }
 483
 484         node = strchr(name, ':');
 485         if (!node) {
 486                 PMD_LOG(WARNING, "could not parse node value from %s",
 487                         name);
 488                 goto out;
 489         }
 490
 491         *node = '\0';
 492         node++;
 493
 494         action = strchr(node, ':');
 495         if (!action) {
 496                 PMD_LOG(WARNING, "could not parse action value from %s",
 497                         node);
 498                 goto out;
 499         }
 500
 501         *action = '\0';
 502         action++;
 503
 504         /*
 505          * Need to do some sanity checking here
 506          */
 507
 508         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 509                 info->list[info->count].action = DEV_ATTACH;
 510         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 511                 info->list[info->count].action = DEV_CREATE;
 512         else
 513                 goto out;
 514
 515         errno = 0;
 516         info->list[info->count].node = strtol(node, &end, 10);
 517
 518         if ((errno != 0) || (*end != '\0')) {
 519                 PMD_LOG(WARNING,
 520                         "node value %s is unparseable as a number", node);
 521                 goto out;
 522         }
 523
 524         strlcpy(info->list[info->count].name, name,
 525                 sizeof(info->list[info->count].name));
 526
 527         info->count++;
 528
 529         ret = 0;
 530 out:
 531         free(name);
 532         return ret;
 533 }
 534
 535 static int
 536 parse_internal_args(const char *key __rte_unused, const char *value,
 537                 void *data)
 538 {
 539         struct ring_internal_args **internal_args = data;
 540         void *args;
 541
 542         sscanf(value, "%p", &args);
 543
 544         *internal_args = args;
 545
 546         if ((*internal_args)->addr != args)
 547                 return -1;
 548
 549         return 0;
 550 }
 551
 552 static int
 553 rte_pmd_ring_probe(struct rte_vdev_device *dev)
 554 {
 555         const char *name, *params;
 556         struct rte_kvargs *kvlist = NULL;
 557         int ret = 0;
 558         struct node_action_list *info = NULL;
 559         struct rte_eth_dev *eth_dev = NULL;
 560         struct ring_internal_args *internal_args;
 561
 562         name = rte_vdev_device_name(dev);
 563         params = rte_vdev_device_args(dev);
 564
 565         PMD_LOG(INFO, "Initializing pmd_ring for %s", name);
 566
 567         if (params == NULL || params[0] == '\0') {
 568                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE,
 569                                 &eth_dev);
 570                 if (ret == -1) {
 571                         PMD_LOG(INFO,
 572                                 "Attach to pmd_ring for %s", name);
 573                         ret = eth_dev_ring_create(name, rte_socket_id(),
 574                                                   DEV_ATTACH, &eth_dev);
 575                 }
 576         } else {
 577                 kvlist = rte_kvargs_parse(params, valid_arguments);
 578
 579                 if (!kvlist) {
 580                         PMD_LOG(INFO,
 581                                 "Ignoring unsupported parameters when creatingrings-backed ethernet device");
 582                         ret = eth_dev_ring_create(name, rte_socket_id(),
 583                                                   DEV_CREATE, &eth_dev);
 584                         if (ret == -1) {
 585                                 PMD_LOG(INFO,
 586                                         "Attach to pmd_ring for %s",
 587                                         name);
 588                                 ret = eth_dev_ring_create(name, rte_socket_id(),
 589                                                           DEV_ATTACH, &eth_dev);
 590                         }
 591
 592                         if (eth_dev)
 593                                 eth_dev->device = &dev->device;
 594
 595                         return ret;
 596                 }
 597
 598                 if (rte_kvargs_count(kvlist, ETH_RING_INTERNAL_ARG) == 1) {
 599                         ret = rte_kvargs_process(kvlist, ETH_RING_INTERNAL_ARG,
 600                                                  parse_internal_args,
 601                                                  &internal_args);
 602                         if (ret < 0)
 603                                 goto out_free;
 604
 605                         ret = do_eth_dev_ring_create(name,
 606                                 internal_args->rx_queues,
 607                                 internal_args->nb_rx_queues,
 608                                 internal_args->tx_queues,
 609                                 internal_args->nb_tx_queues,
 610                                 internal_args->numa_node,
 611                                 DEV_ATTACH,
 612                                 &eth_dev);
 613                         if (ret >= 0)
 614                                 ret = 0;
 615                 } else {
 616                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 617                         info = rte_zmalloc("struct node_action_list",
 618                                            sizeof(struct node_action_list) +
 619                                            (sizeof(struct node_action_pair) * ret),
 620                                            0);
 621                         if (!info)
 622                                 goto out_free;
 623
 624                         info->total = ret;
 625                         info->list = (struct node_action_pair *)(info + 1);
 626
 627                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 628                                                  parse_kvlist, info);
 629
 630                         if (ret < 0)
 631                                 goto out_free;
 632
 633                         for (info->count = 0; info->count < info->total; info->count++) {
 634                                 ret = eth_dev_ring_create(info->list[info->count].name,
 635                                                           info->list[info->count].node,
 636                                                           info->list[info->count].action,
 637                                                           &eth_dev);
 638                                 if ((ret == -1) &&
 639                                     (info->list[info->count].action == DEV_CREATE)) {
 640                                         PMD_LOG(INFO,
 641                                                 "Attach to pmd_ring for %s",
 642                                                 name);
 643                                         ret = eth_dev_ring_create(name,
 644                                                         info->list[info->count].node,
 645                                                         DEV_ATTACH,
 646                                                         &eth_dev);
 647                                 }
 648                         }
 649                 }
 650         }
 651
 652         if (eth_dev)
 653                 eth_dev->device = &dev->device;
 654
 655 out_free:
 656         rte_kvargs_free(kvlist);
 657         rte_free(info);
 658         return ret;
 659 }
 660
 661 static int
 662 rte_pmd_ring_remove(struct rte_vdev_device *dev)
 663 {
 664         const char *name = rte_vdev_device_name(dev);
 665         struct rte_eth_dev *eth_dev = NULL;
 666         struct pmd_internals *internals = NULL;
 667         struct ring_queue *r = NULL;
 668         uint16_t i;
 669
 670         PMD_LOG(INFO, "Un-Initializing pmd_ring for %s", name);
 671
 672         if (name == NULL)
 673                 return -EINVAL;
 674
 675         /* find an ethdev entry */
 676         eth_dev = rte_eth_dev_allocated(name);
 677         if (eth_dev == NULL)
 678                 return -ENODEV;
 679
 680         eth_dev_stop(eth_dev);
 681
 682         internals = eth_dev->data->dev_private;
 683         if (internals->action == DEV_CREATE) {
 684                 /*
 685                  * it is only necessary to delete the rings in rx_queues because
 686                  * they are the same used in tx_queues
 687                  */
 688                 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 689                         r = eth_dev->data->rx_queues[i];
 690                         rte_ring_free(r->rng);
 691                 }
 692         }
 693
 694         /* mac_addrs must not be freed alone because part of dev_private */
 695         eth_dev->data->mac_addrs = NULL;
 696         rte_eth_dev_release_port(eth_dev);
 697         return 0;
 698 }
 699
 700 static struct rte_vdev_driver pmd_ring_drv = {
 701         .probe = rte_pmd_ring_probe,
 702         .remove = rte_pmd_ring_remove,
 703 };
 704
 705 RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
 706 RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
 707 RTE_PMD_REGISTER_PARAM_STRING(net_ring,
 708         ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");
 709
 710 RTE_INIT(eth_ring_init_log)
 711 {
 712         eth_ring_logtype = rte_log_register("pmd.net.ring");
 713         if (eth_ring_logtype >= 0)
 714                 rte_log_set_level(eth_ring_logtype, RTE_LOG_NOTICE);
 715 }