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