drivers/net/ring/rte_eth_ring.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "rte_eth_ring.h"
  35 #include <rte_mbuf.h>
  36 #include <rte_ethdev.h>
  37 #include <rte_malloc.h>
  38 #include <rte_memcpy.h>
  39 #include <rte_string_fns.h>
  40 #include <rte_bus_vdev.h>
  41 #include <rte_kvargs.h>
  42 #include <rte_errno.h>
  43
  44 #define ETH_RING_NUMA_NODE_ACTION_ARG   "nodeaction"
  45 #define ETH_RING_ACTION_CREATE          "CREATE"
  46 #define ETH_RING_ACTION_ATTACH          "ATTACH"
  47 #define ETH_RING_INTERNAL_ARG           "internal"
  48
  49 static const char *valid_arguments[] = {
  50         ETH_RING_NUMA_NODE_ACTION_ARG,
  51         ETH_RING_INTERNAL_ARG,
  52         NULL
  53 };
  54
  55 struct ring_internal_args {
  56         struct rte_ring * const *rx_queues;
  57         const unsigned int nb_rx_queues;
  58         struct rte_ring * const *tx_queues;
  59         const unsigned int nb_tx_queues;
  60         const unsigned int numa_node;
  61         void *addr; /* self addr for sanity check */
  62 };
  63
  64 enum dev_action {
  65         DEV_CREATE,
  66         DEV_ATTACH
  67 };
  68
  69 struct ring_queue {
  70         struct rte_ring *rng;
  71         rte_atomic64_t rx_pkts;
  72         rte_atomic64_t tx_pkts;
  73         rte_atomic64_t err_pkts;
  74 };
  75
  76 struct pmd_internals {
  77         unsigned max_rx_queues;
  78         unsigned max_tx_queues;
  79
  80         struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
  81         struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
  82
  83         struct ether_addr address;
  84         enum dev_action action;
  85 };
  86
  87
  88 static struct rte_eth_link pmd_link = {
  89                 .link_speed = ETH_SPEED_NUM_10G,
  90                 .link_duplex = ETH_LINK_FULL_DUPLEX,
  91                 .link_status = ETH_LINK_DOWN,
  92                 .link_autoneg = ETH_LINK_AUTONEG
  93 };
  94
  95 static uint16_t
  96 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  97 {
  98         void **ptrs = (void *)&bufs[0];
  99         struct ring_queue *r = q;
 100         const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
 101                         ptrs, nb_bufs, NULL);
 102         if (r->rng->flags & RING_F_SC_DEQ)
 103                 r->rx_pkts.cnt += nb_rx;
 104         else
 105                 rte_atomic64_add(&(r->rx_pkts), nb_rx);
 106         return nb_rx;
 107 }
 108
 109 static uint16_t
 110 eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 111 {
 112         void **ptrs = (void *)&bufs[0];
 113         struct ring_queue *r = q;
 114         const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
 115                         ptrs, nb_bufs, NULL);
 116         if (r->rng->flags & RING_F_SP_ENQ) {
 117                 r->tx_pkts.cnt += nb_tx;
 118                 r->err_pkts.cnt += nb_bufs - nb_tx;
 119         } else {
 120                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
 121                 rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
 122         }
 123         return nb_tx;
 124 }
 125
 126 static int
 127 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
 128
 129 static int
 130 eth_dev_start(struct rte_eth_dev *dev)
 131 {
 132         dev->data->dev_link.link_status = ETH_LINK_UP;
 133         return 0;
 134 }
 135
 136 static void
 137 eth_dev_stop(struct rte_eth_dev *dev)
 138 {
 139         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 140 }
 141
 142 static int
 143 eth_dev_set_link_down(struct rte_eth_dev *dev)
 144 {
 145         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 146         return 0;
 147 }
 148
 149 static int
 150 eth_dev_set_link_up(struct rte_eth_dev *dev)
 151 {
 152         dev->data->dev_link.link_status = ETH_LINK_UP;
 153         return 0;
 154 }
 155
 156 static int
 157 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 158                                     uint16_t nb_rx_desc __rte_unused,
 159                                     unsigned int socket_id __rte_unused,
 160                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
 161                                     struct rte_mempool *mb_pool __rte_unused)
 162 {
 163         struct pmd_internals *internals = dev->data->dev_private;
 164         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
 165         return 0;
 166 }
 167
 168 static int
 169 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 170                                     uint16_t nb_tx_desc __rte_unused,
 171                                     unsigned int socket_id __rte_unused,
 172                                     const struct rte_eth_txconf *tx_conf __rte_unused)
 173 {
 174         struct pmd_internals *internals = dev->data->dev_private;
 175         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
 176         return 0;
 177 }
 178
 179
 180 static void
 181 eth_dev_info(struct rte_eth_dev *dev,
 182                 struct rte_eth_dev_info *dev_info)
 183 {
 184         struct pmd_internals *internals = dev->data->dev_private;
 185         dev_info->max_mac_addrs = 1;
 186         dev_info->max_rx_pktlen = (uint32_t)-1;
 187         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
 188         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
 189         dev_info->min_rx_bufsize = 0;
 190 }
 191
 192 static int
 193 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 194 {
 195         unsigned i;
 196         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 197         const struct pmd_internals *internal = dev->data->dev_private;
 198
 199         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 200                         i < dev->data->nb_rx_queues; i++) {
 201                 stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
 202                 rx_total += stats->q_ipackets[i];
 203         }
 204
 205         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 206                         i < dev->data->nb_tx_queues; i++) {
 207                 stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
 208                 stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
 209                 tx_total += stats->q_opackets[i];
 210                 tx_err_total += stats->q_errors[i];
 211         }
 212
 213         stats->ipackets = rx_total;
 214         stats->opackets = tx_total;
 215         stats->oerrors = tx_err_total;
 216
 217         return 0;
 218 }
 219
 220 static void
 221 eth_stats_reset(struct rte_eth_dev *dev)
 222 {
 223         unsigned i;
 224         struct pmd_internals *internal = dev->data->dev_private;
 225         for (i = 0; i < dev->data->nb_rx_queues; i++)
 226                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
 227         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 228                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
 229                 internal->tx_ring_queues[i].err_pkts.cnt = 0;
 230         }
 231 }
 232
 233 static void
 234 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
 235         uint32_t index __rte_unused)
 236 {
 237 }
 238
 239 static int
 240 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
 241         struct ether_addr *mac_addr __rte_unused,
 242         uint32_t index __rte_unused,
 243         uint32_t vmdq __rte_unused)
 244 {
 245         return 0;
 246 }
 247
 248 static void
 249 eth_queue_release(void *q __rte_unused) { ; }
 250 static int
 251 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 252                 int wait_to_complete __rte_unused) { return 0; }
 253
 254 static const struct eth_dev_ops ops = {
 255         .dev_start = eth_dev_start,
 256         .dev_stop = eth_dev_stop,
 257         .dev_set_link_up = eth_dev_set_link_up,
 258         .dev_set_link_down = eth_dev_set_link_down,
 259         .dev_configure = eth_dev_configure,
 260         .dev_infos_get = eth_dev_info,
 261         .rx_queue_setup = eth_rx_queue_setup,
 262         .tx_queue_setup = eth_tx_queue_setup,
 263         .rx_queue_release = eth_queue_release,
 264         .tx_queue_release = eth_queue_release,
 265         .link_update = eth_link_update,
 266         .stats_get = eth_stats_get,
 267         .stats_reset = eth_stats_reset,
 268         .mac_addr_remove = eth_mac_addr_remove,
 269         .mac_addr_add = eth_mac_addr_add,
 270 };
 271
 272 static struct rte_vdev_driver pmd_ring_drv;
 273
 274 static int
 275 do_eth_dev_ring_create(const char *name,
 276                 struct rte_ring * const rx_queues[], const unsigned nb_rx_queues,
 277                 struct rte_ring *const tx_queues[], const unsigned nb_tx_queues,
 278                 const unsigned int numa_node, enum dev_action action,
 279                 struct rte_eth_dev **eth_dev_p)
 280 {
 281         struct rte_eth_dev_data *data = NULL;
 282         struct pmd_internals *internals = NULL;
 283         struct rte_eth_dev *eth_dev = NULL;
 284         void **rx_queues_local = NULL;
 285         void **tx_queues_local = NULL;
 286         unsigned i;
 287
 288         RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
 289                         numa_node);
 290
 291         /* now do all data allocation - for eth_dev structure, dummy pci driver
 292          * and internal (private) data
 293          */
 294         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
 295         if (data == NULL) {
 296                 rte_errno = ENOMEM;
 297                 goto error;
 298         }
 299
 300         rx_queues_local = rte_zmalloc_socket(name,
 301                         sizeof(void *) * nb_rx_queues, 0, numa_node);
 302         if (rx_queues_local == NULL) {
 303                 rte_errno = ENOMEM;
 304                 goto error;
 305         }
 306
 307         tx_queues_local = rte_zmalloc_socket(name,
 308                         sizeof(void *) * nb_tx_queues, 0, numa_node);
 309         if (tx_queues_local == NULL) {
 310                 rte_errno = ENOMEM;
 311                 goto error;
 312         }
 313
 314         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
 315         if (internals == NULL) {
 316                 rte_errno = ENOMEM;
 317                 goto error;
 318         }
 319
 320         /* reserve an ethdev entry */
 321         eth_dev = rte_eth_dev_allocate(name);
 322         if (eth_dev == NULL) {
 323                 rte_errno = ENOSPC;
 324                 goto error;
 325         }
 326
 327         /* now put it all together
 328          * - store queue data in internals,
 329          * - store numa_node info in eth_dev_data
 330          * - point eth_dev_data to internals
 331          * - and point eth_dev structure to new eth_dev_data structure
 332          */
 333         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 334          * so the rings are local per-process */
 335
 336         rte_memcpy(data, eth_dev->data, sizeof(*data));
 337         data->rx_queues = rx_queues_local;
 338         data->tx_queues = tx_queues_local;
 339
 340         internals->action = action;
 341         internals->max_rx_queues = nb_rx_queues;
 342         internals->max_tx_queues = nb_tx_queues;
 343         for (i = 0; i < nb_rx_queues; i++) {
 344                 internals->rx_ring_queues[i].rng = rx_queues[i];
 345                 data->rx_queues[i] = &internals->rx_ring_queues[i];
 346         }
 347         for (i = 0; i < nb_tx_queues; i++) {
 348                 internals->tx_ring_queues[i].rng = tx_queues[i];
 349                 data->tx_queues[i] = &internals->tx_ring_queues[i];
 350         }
 351
 352         data->dev_private = internals;
 353         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 354         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 355         data->dev_link = pmd_link;
 356         data->mac_addrs = &internals->address;
 357
 358         eth_dev->data = data;
 359         eth_dev->dev_ops = &ops;
 360         data->kdrv = RTE_KDRV_NONE;
 361         data->numa_node = numa_node;
 362
 363         /* finally assign rx and tx ops */
 364         eth_dev->rx_pkt_burst = eth_ring_rx;
 365         eth_dev->tx_pkt_burst = eth_ring_tx;
 366
 367         *eth_dev_p = eth_dev;
 368
 369         return data->port_id;
 370
 371 error:
 372         rte_free(rx_queues_local);
 373         rte_free(tx_queues_local);
 374         rte_free(data);
 375         rte_free(internals);
 376
 377         return -1;
 378 }
 379
 380 int
 381 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 382                 const unsigned nb_rx_queues,
 383                 struct rte_ring *const tx_queues[],
 384                 const unsigned nb_tx_queues,
 385                 const unsigned numa_node)
 386 {
 387         struct ring_internal_args args = {
 388                 .rx_queues = rx_queues,
 389                 .nb_rx_queues = nb_rx_queues,
 390                 .tx_queues = tx_queues,
 391                 .nb_tx_queues = nb_tx_queues,
 392                 .numa_node = numa_node,
 393                 .addr = &args,
 394         };
 395         char args_str[32] = { 0 };
 396         char ring_name[32] = { 0 };
 397         uint16_t port_id = RTE_MAX_ETHPORTS;
 398         int ret;
 399
 400         /* do some parameter checking */
 401         if (rx_queues == NULL && nb_rx_queues > 0) {
 402                 rte_errno = EINVAL;
 403                 return -1;
 404         }
 405         if (tx_queues == NULL && nb_tx_queues > 0) {
 406                 rte_errno = EINVAL;
 407                 return -1;
 408         }
 409         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
 410                 rte_errno = EINVAL;
 411                 return -1;
 412         }
 413
 414         snprintf(args_str, 32, "%s=%p", ETH_RING_INTERNAL_ARG, &args);
 415         snprintf(ring_name, 32, "net_ring_%s", name);
 416
 417         ret = rte_vdev_init(ring_name, args_str);
 418         if (ret) {
 419                 rte_errno = EINVAL;
 420                 return -1;
 421         }
 422
 423         rte_eth_dev_get_port_by_name(ring_name, &port_id);
 424
 425         return port_id;
 426 }
 427
 428 int
 429 rte_eth_from_ring(struct rte_ring *r)
 430 {
 431         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
 432                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
 433 }
 434
 435 static int
 436 eth_dev_ring_create(const char *name, const unsigned numa_node,
 437                 enum dev_action action, struct rte_eth_dev **eth_dev)
 438 {
 439         /* rx and tx are so-called from point of view of first port.
 440          * They are inverted from the point of view of second port
 441          */
 442         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
 443         unsigned i;
 444         char rng_name[RTE_RING_NAMESIZE];
 445         unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
 446                         RTE_PMD_RING_MAX_TX_RINGS);
 447
 448         for (i = 0; i < num_rings; i++) {
 449                 snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
 450                 rxtx[i] = (action == DEV_CREATE) ?
 451                                 rte_ring_create(rng_name, 1024, numa_node,
 452                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
 453                                 rte_ring_lookup(rng_name);
 454                 if (rxtx[i] == NULL)
 455                         return -1;
 456         }
 457
 458         if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
 459                 numa_node, action, eth_dev) < 0)
 460                 return -1;
 461
 462         return 0;
 463 }
 464
 465 struct node_action_pair {
 466         char name[PATH_MAX];
 467         unsigned node;
 468         enum dev_action action;
 469 };
 470
 471 struct node_action_list {
 472         unsigned total;
 473         unsigned count;
 474         struct node_action_pair *list;
 475 };
 476
 477 static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
 478 {
 479         struct node_action_list *info = data;
 480         int ret;
 481         char *name;
 482         char *action;
 483         char *node;
 484         char *end;
 485
 486         name = strdup(value);
 487
 488         ret = -EINVAL;
 489
 490         if (!name) {
 491                 RTE_LOG(WARNING, PMD, "command line parameter is empty for ring pmd!\n");
 492                 goto out;
 493         }
 494
 495         node = strchr(name, ':');
 496         if (!node) {
 497                 RTE_LOG(WARNING, PMD, "could not parse node value from %s\n",
 498                         name);
 499                 goto out;
 500         }
 501
 502         *node = '\0';
 503         node++;
 504
 505         action = strchr(node, ':');
 506         if (!action) {
 507                 RTE_LOG(WARNING, PMD, "could not parse action value from %s\n",
 508                         node);
 509                 goto out;
 510         }
 511
 512         *action = '\0';
 513         action++;
 514
 515         /*
 516          * Need to do some sanity checking here
 517          */
 518
 519         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
 520                 info->list[info->count].action = DEV_ATTACH;
 521         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
 522                 info->list[info->count].action = DEV_CREATE;
 523         else
 524                 goto out;
 525
 526         errno = 0;
 527         info->list[info->count].node = strtol(node, &end, 10);
 528
 529         if ((errno != 0) || (*end != '\0')) {
 530                 RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
 531                 goto out;
 532         }
 533
 534         snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);
 535
 536         info->count++;
 537
 538         ret = 0;
 539 out:
 540         free(name);
 541         return ret;
 542 }
 543
 544 static int
 545 parse_internal_args(const char *key __rte_unused, const char *value,
 546                 void *data)
 547 {
 548         struct ring_internal_args **internal_args = data;
 549         void *args;
 550
 551         sscanf(value, "%p", &args);
 552
 553         *internal_args = args;
 554
 555         if ((*internal_args)->addr != args)
 556                 return -1;
 557
 558         return 0;
 559 }
 560
 561 static int
 562 rte_pmd_ring_probe(struct rte_vdev_device *dev)
 563 {
 564         const char *name, *params;
 565         struct rte_kvargs *kvlist = NULL;
 566         int ret = 0;
 567         struct node_action_list *info = NULL;
 568         struct rte_eth_dev *eth_dev = NULL;
 569         struct ring_internal_args *internal_args;
 570
 571         name = rte_vdev_device_name(dev);
 572         params = rte_vdev_device_args(dev);
 573
 574         RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
 575
 576         if (params == NULL || params[0] == '\0') {
 577                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE,
 578                                 &eth_dev);
 579                 if (ret == -1) {
 580                         RTE_LOG(INFO, PMD,
 581                                 "Attach to pmd_ring for %s\n", name);
 582                         ret = eth_dev_ring_create(name, rte_socket_id(),
 583                                                   DEV_ATTACH, &eth_dev);
 584                 }
 585         } else {
 586                 kvlist = rte_kvargs_parse(params, valid_arguments);
 587
 588                 if (!kvlist) {
 589                         RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
 590                                         " rings-backed ethernet device\n");
 591                         ret = eth_dev_ring_create(name, rte_socket_id(),
 592                                                   DEV_CREATE, &eth_dev);
 593                         if (ret == -1) {
 594                                 RTE_LOG(INFO, PMD,
 595                                         "Attach to pmd_ring for %s\n",
 596                                         name);
 597                                 ret = eth_dev_ring_create(name, rte_socket_id(),
 598                                                           DEV_ATTACH, &eth_dev);
 599                         }
 600
 601                         if (eth_dev)
 602                                 eth_dev->device = &dev->device;
 603
 604                         return ret;
 605                 }
 606
 607                 if (rte_kvargs_count(kvlist, ETH_RING_INTERNAL_ARG) == 1) {
 608                         ret = rte_kvargs_process(kvlist, ETH_RING_INTERNAL_ARG,
 609                                                  parse_internal_args,
 610                                                  &internal_args);
 611                         if (ret < 0)
 612                                 goto out_free;
 613
 614                         ret = do_eth_dev_ring_create(name,
 615                                 internal_args->rx_queues,
 616                                 internal_args->nb_rx_queues,
 617                                 internal_args->tx_queues,
 618                                 internal_args->nb_tx_queues,
 619                                 internal_args->numa_node,
 620                                 DEV_ATTACH,
 621                                 &eth_dev);
 622                         if (ret >= 0)
 623                                 ret = 0;
 624                 } else {
 625                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
 626                         info = rte_zmalloc("struct node_action_list",
 627                                            sizeof(struct node_action_list) +
 628                                            (sizeof(struct node_action_pair) * ret),
 629                                            0);
 630                         if (!info)
 631                                 goto out_free;
 632
 633                         info->total = ret;
 634                         info->list = (struct node_action_pair*)(info + 1);
 635
 636                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
 637                                                  parse_kvlist, info);
 638
 639                         if (ret < 0)
 640                                 goto out_free;
 641
 642                         for (info->count = 0; info->count < info->total; info->count++) {
 643                                 ret = eth_dev_ring_create(info->list[info->count].name,
 644                                                           info->list[info->count].node,
 645                                                           info->list[info->count].action,
 646                                                           &eth_dev);
 647                                 if ((ret == -1) &&
 648                                     (info->list[info->count].action == DEV_CREATE)) {
 649                                         RTE_LOG(INFO, PMD,
 650                                                 "Attach to pmd_ring for %s\n",
 651                                                 name);
 652                                         ret = eth_dev_ring_create(name,
 653                                                         info->list[info->count].node,
 654                                                         DEV_ATTACH,
 655                                                         &eth_dev);
 656                                 }
 657                         }
 658                 }
 659         }
 660
 661         if (eth_dev)
 662                 eth_dev->device = &dev->device;
 663
 664 out_free:
 665         rte_kvargs_free(kvlist);
 666         rte_free(info);
 667         return ret;
 668 }
 669
 670 static int
 671 rte_pmd_ring_remove(struct rte_vdev_device *dev)
 672 {
 673         const char *name = rte_vdev_device_name(dev);
 674         struct rte_eth_dev *eth_dev = NULL;
 675         struct pmd_internals *internals = NULL;
 676         struct ring_queue *r = NULL;
 677         uint16_t i;
 678
 679         RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
 680
 681         if (name == NULL)
 682                 return -EINVAL;
 683
 684         /* find an ethdev entry */
 685         eth_dev = rte_eth_dev_allocated(name);
 686         if (eth_dev == NULL)
 687                 return -ENODEV;
 688
 689         eth_dev_stop(eth_dev);
 690
 691         internals = eth_dev->data->dev_private;
 692         if (internals->action == DEV_CREATE) {
 693                 /*
 694                  * it is only necessary to delete the rings in rx_queues because
 695                  * they are the same used in tx_queues
 696                  */
 697                 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 698                         r = eth_dev->data->rx_queues[i];
 699                         rte_ring_free(r->rng);
 700                 }
 701         }
 702
 703         rte_free(eth_dev->data->rx_queues);
 704         rte_free(eth_dev->data->tx_queues);
 705         rte_free(eth_dev->data->dev_private);
 706
 707         rte_free(eth_dev->data);
 708
 709         rte_eth_dev_release_port(eth_dev);
 710         return 0;
 711 }
 712
 713 static struct rte_vdev_driver pmd_ring_drv = {
 714         .probe = rte_pmd_ring_probe,
 715         .remove = rte_pmd_ring_remove,
 716 };
 717
 718 RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
 719 RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
 720 RTE_PMD_REGISTER_PARAM_STRING(net_ring,
 721         ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");