lib/librte_eventdev/rte_eventdev.c

   1 /*
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 Cavium, Inc. All rights reserved.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Cavium, Inc nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <ctype.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <stdarg.h>
  38 #include <errno.h>
  39 #include <stdint.h>
  40 #include <inttypes.h>
  41 #include <sys/types.h>
  42 #include <sys/queue.h>
  43
  44 #include <rte_byteorder.h>
  45 #include <rte_log.h>
  46 #include <rte_debug.h>
  47 #include <rte_dev.h>
  48 #include <rte_memory.h>
  49 #include <rte_memcpy.h>
  50 #include <rte_memzone.h>
  51 #include <rte_eal.h>
  52 #include <rte_per_lcore.h>
  53 #include <rte_lcore.h>
  54 #include <rte_atomic.h>
  55 #include <rte_branch_prediction.h>
  56 #include <rte_common.h>
  57 #include <rte_malloc.h>
  58 #include <rte_errno.h>
  59
  60 #include "rte_eventdev.h"
  61 #include "rte_eventdev_pmd.h"
  62
  63 struct rte_eventdev rte_event_devices[RTE_EVENT_MAX_DEVS];
  64
  65 struct rte_eventdev *rte_eventdevs = &rte_event_devices[0];
  66
  67 static struct rte_eventdev_global eventdev_globals = {
  68         .nb_devs                = 0
  69 };
  70
  71 struct rte_eventdev_global *rte_eventdev_globals = &eventdev_globals;
  72
  73 /* Event dev north bound API implementation */
  74
  75 uint8_t
  76 rte_event_dev_count(void)
  77 {
  78         return rte_eventdev_globals->nb_devs;
  79 }
  80
  81 int
  82 rte_event_dev_get_dev_id(const char *name)
  83 {
  84         int i;
  85
  86         if (!name)
  87                 return -EINVAL;
  88
  89         for (i = 0; i < rte_eventdev_globals->nb_devs; i++)
  90                 if ((strcmp(rte_event_devices[i].data->name, name)
  91                                 == 0) &&
  92                                 (rte_event_devices[i].attached ==
  93                                                 RTE_EVENTDEV_ATTACHED))
  94                         return i;
  95         return -ENODEV;
  96 }
  97
  98 int
  99 rte_event_dev_socket_id(uint8_t dev_id)
 100 {
 101         struct rte_eventdev *dev;
 102
 103         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 104         dev = &rte_eventdevs[dev_id];
 105
 106         return dev->data->socket_id;
 107 }
 108
 109 int
 110 rte_event_dev_info_get(uint8_t dev_id, struct rte_event_dev_info *dev_info)
 111 {
 112         struct rte_eventdev *dev;
 113
 114         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 115         dev = &rte_eventdevs[dev_id];
 116
 117         if (dev_info == NULL)
 118                 return -EINVAL;
 119
 120         memset(dev_info, 0, sizeof(struct rte_event_dev_info));
 121
 122         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
 123         (*dev->dev_ops->dev_infos_get)(dev, dev_info);
 124
 125         dev_info->dequeue_timeout_ns = dev->data->dev_conf.dequeue_timeout_ns;
 126
 127         dev_info->dev = dev->dev;
 128         return 0;
 129 }
 130
 131 static inline int
 132 rte_event_dev_queue_config(struct rte_eventdev *dev, uint8_t nb_queues)
 133 {
 134         uint8_t old_nb_queues = dev->data->nb_queues;
 135         uint8_t *queues_prio;
 136         unsigned int i;
 137
 138         RTE_EDEV_LOG_DEBUG("Setup %d queues on device %u", nb_queues,
 139                          dev->data->dev_id);
 140
 141         /* First time configuration */
 142         if (dev->data->queues_prio == NULL && nb_queues != 0) {
 143                 /* Allocate memory to store queue priority */
 144                 dev->data->queues_prio = rte_zmalloc_socket(
 145                                 "eventdev->data->queues_prio",
 146                                 sizeof(dev->data->queues_prio[0]) * nb_queues,
 147                                 RTE_CACHE_LINE_SIZE, dev->data->socket_id);
 148                 if (dev->data->queues_prio == NULL) {
 149                         dev->data->nb_queues = 0;
 150                         RTE_EDEV_LOG_ERR("failed to get mem for queue priority,"
 151                                         "nb_queues %u", nb_queues);
 152                         return -(ENOMEM);
 153                 }
 154         /* Re-configure */
 155         } else if (dev->data->queues_prio != NULL && nb_queues != 0) {
 156                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_release, -ENOTSUP);
 157
 158                 for (i = nb_queues; i < old_nb_queues; i++)
 159                         (*dev->dev_ops->queue_release)(dev, i);
 160
 161                 /* Re allocate memory to store queue priority */
 162                 queues_prio = dev->data->queues_prio;
 163                 queues_prio = rte_realloc(queues_prio,
 164                                 sizeof(queues_prio[0]) * nb_queues,
 165                                 RTE_CACHE_LINE_SIZE);
 166                 if (queues_prio == NULL) {
 167                         RTE_EDEV_LOG_ERR("failed to realloc queue priority,"
 168                                                 " nb_queues %u", nb_queues);
 169                         return -(ENOMEM);
 170                 }
 171                 dev->data->queues_prio = queues_prio;
 172
 173                 if (nb_queues > old_nb_queues) {
 174                         uint8_t new_qs = nb_queues - old_nb_queues;
 175
 176                         memset(queues_prio + old_nb_queues, 0,
 177                                 sizeof(queues_prio[0]) * new_qs);
 178                 }
 179         } else if (dev->data->queues_prio != NULL && nb_queues == 0) {
 180                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_release, -ENOTSUP);
 181
 182                 for (i = nb_queues; i < old_nb_queues; i++)
 183                         (*dev->dev_ops->queue_release)(dev, i);
 184         }
 185
 186         dev->data->nb_queues = nb_queues;
 187         return 0;
 188 }
 189
 190 #define EVENT_QUEUE_SERVICE_PRIORITY_INVALID (0xdead)
 191
 192 static inline int
 193 rte_event_dev_port_config(struct rte_eventdev *dev, uint8_t nb_ports)
 194 {
 195         uint8_t old_nb_ports = dev->data->nb_ports;
 196         void **ports;
 197         uint16_t *links_map;
 198         uint8_t *ports_dequeue_depth;
 199         uint8_t *ports_enqueue_depth;
 200         unsigned int i;
 201
 202         RTE_EDEV_LOG_DEBUG("Setup %d ports on device %u", nb_ports,
 203                          dev->data->dev_id);
 204
 205         /* First time configuration */
 206         if (dev->data->ports == NULL && nb_ports != 0) {
 207                 dev->data->ports = rte_zmalloc_socket("eventdev->data->ports",
 208                                 sizeof(dev->data->ports[0]) * nb_ports,
 209                                 RTE_CACHE_LINE_SIZE, dev->data->socket_id);
 210                 if (dev->data->ports == NULL) {
 211                         dev->data->nb_ports = 0;
 212                         RTE_EDEV_LOG_ERR("failed to get mem for port meta data,"
 213                                         "nb_ports %u", nb_ports);
 214                         return -(ENOMEM);
 215                 }
 216
 217                 /* Allocate memory to store ports dequeue depth */
 218                 dev->data->ports_dequeue_depth =
 219                         rte_zmalloc_socket("eventdev->ports_dequeue_depth",
 220                         sizeof(dev->data->ports_dequeue_depth[0]) * nb_ports,
 221                         RTE_CACHE_LINE_SIZE, dev->data->socket_id);
 222                 if (dev->data->ports_dequeue_depth == NULL) {
 223                         dev->data->nb_ports = 0;
 224                         RTE_EDEV_LOG_ERR("failed to get mem for port deq meta,"
 225                                         "nb_ports %u", nb_ports);
 226                         return -(ENOMEM);
 227                 }
 228
 229                 /* Allocate memory to store ports enqueue depth */
 230                 dev->data->ports_enqueue_depth =
 231                         rte_zmalloc_socket("eventdev->ports_enqueue_depth",
 232                         sizeof(dev->data->ports_enqueue_depth[0]) * nb_ports,
 233                         RTE_CACHE_LINE_SIZE, dev->data->socket_id);
 234                 if (dev->data->ports_enqueue_depth == NULL) {
 235                         dev->data->nb_ports = 0;
 236                         RTE_EDEV_LOG_ERR("failed to get mem for port enq meta,"
 237                                         "nb_ports %u", nb_ports);
 238                         return -(ENOMEM);
 239                 }
 240
 241                 /* Allocate memory to store queue to port link connection */
 242                 dev->data->links_map =
 243                         rte_zmalloc_socket("eventdev->links_map",
 244                         sizeof(dev->data->links_map[0]) * nb_ports *
 245                         RTE_EVENT_MAX_QUEUES_PER_DEV,
 246                         RTE_CACHE_LINE_SIZE, dev->data->socket_id);
 247                 if (dev->data->links_map == NULL) {
 248                         dev->data->nb_ports = 0;
 249                         RTE_EDEV_LOG_ERR("failed to get mem for port_map area,"
 250                                         "nb_ports %u", nb_ports);
 251                         return -(ENOMEM);
 252                 }
 253                 for (i = 0; i < nb_ports * RTE_EVENT_MAX_QUEUES_PER_DEV; i++)
 254                         dev->data->links_map[i] =
 255                                 EVENT_QUEUE_SERVICE_PRIORITY_INVALID;
 256         } else if (dev->data->ports != NULL && nb_ports != 0) {/* re-config */
 257                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_release, -ENOTSUP);
 258
 259                 ports = dev->data->ports;
 260                 ports_dequeue_depth = dev->data->ports_dequeue_depth;
 261                 ports_enqueue_depth = dev->data->ports_enqueue_depth;
 262                 links_map = dev->data->links_map;
 263
 264                 for (i = nb_ports; i < old_nb_ports; i++)
 265                         (*dev->dev_ops->port_release)(ports[i]);
 266
 267                 /* Realloc memory for ports */
 268                 ports = rte_realloc(ports, sizeof(ports[0]) * nb_ports,
 269                                 RTE_CACHE_LINE_SIZE);
 270                 if (ports == NULL) {
 271                         RTE_EDEV_LOG_ERR("failed to realloc port meta data,"
 272                                                 " nb_ports %u", nb_ports);
 273                         return -(ENOMEM);
 274                 }
 275
 276                 /* Realloc memory for ports_dequeue_depth */
 277                 ports_dequeue_depth = rte_realloc(ports_dequeue_depth,
 278                         sizeof(ports_dequeue_depth[0]) * nb_ports,
 279                         RTE_CACHE_LINE_SIZE);
 280                 if (ports_dequeue_depth == NULL) {
 281                         RTE_EDEV_LOG_ERR("failed to realloc port dequeue meta,"
 282                                                 " nb_ports %u", nb_ports);
 283                         return -(ENOMEM);
 284                 }
 285
 286                 /* Realloc memory for ports_enqueue_depth */
 287                 ports_enqueue_depth = rte_realloc(ports_enqueue_depth,
 288                         sizeof(ports_enqueue_depth[0]) * nb_ports,
 289                         RTE_CACHE_LINE_SIZE);
 290                 if (ports_enqueue_depth == NULL) {
 291                         RTE_EDEV_LOG_ERR("failed to realloc port enqueue meta,"
 292                                                 " nb_ports %u", nb_ports);
 293                         return -(ENOMEM);
 294                 }
 295
 296                 /* Realloc memory to store queue to port link connection */
 297                 links_map = rte_realloc(links_map,
 298                         sizeof(dev->data->links_map[0]) * nb_ports *
 299                         RTE_EVENT_MAX_QUEUES_PER_DEV,
 300                         RTE_CACHE_LINE_SIZE);
 301                 if (links_map == NULL) {
 302                         dev->data->nb_ports = 0;
 303                         RTE_EDEV_LOG_ERR("failed to realloc mem for port_map,"
 304                                         "nb_ports %u", nb_ports);
 305                         return -(ENOMEM);
 306                 }
 307
 308                 if (nb_ports > old_nb_ports) {
 309                         uint8_t new_ps = nb_ports - old_nb_ports;
 310                         unsigned int old_links_map_end =
 311                                 old_nb_ports * RTE_EVENT_MAX_QUEUES_PER_DEV;
 312                         unsigned int links_map_end =
 313                                 nb_ports * RTE_EVENT_MAX_QUEUES_PER_DEV;
 314
 315                         memset(ports + old_nb_ports, 0,
 316                                 sizeof(ports[0]) * new_ps);
 317                         memset(ports_dequeue_depth + old_nb_ports, 0,
 318                                 sizeof(ports_dequeue_depth[0]) * new_ps);
 319                         memset(ports_enqueue_depth + old_nb_ports, 0,
 320                                 sizeof(ports_enqueue_depth[0]) * new_ps);
 321                         for (i = old_links_map_end; i < links_map_end; i++)
 322                                 links_map[i] =
 323                                         EVENT_QUEUE_SERVICE_PRIORITY_INVALID;
 324                 }
 325
 326                 dev->data->ports = ports;
 327                 dev->data->ports_dequeue_depth = ports_dequeue_depth;
 328                 dev->data->ports_enqueue_depth = ports_enqueue_depth;
 329                 dev->data->links_map = links_map;
 330         } else if (dev->data->ports != NULL && nb_ports == 0) {
 331                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_release, -ENOTSUP);
 332
 333                 ports = dev->data->ports;
 334                 for (i = nb_ports; i < old_nb_ports; i++)
 335                         (*dev->dev_ops->port_release)(ports[i]);
 336         }
 337
 338         dev->data->nb_ports = nb_ports;
 339         return 0;
 340 }
 341
 342 int
 343 rte_event_dev_configure(uint8_t dev_id,
 344                         const struct rte_event_dev_config *dev_conf)
 345 {
 346         struct rte_eventdev *dev;
 347         struct rte_event_dev_info info;
 348         int diag;
 349
 350         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 351         dev = &rte_eventdevs[dev_id];
 352
 353         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
 354         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);
 355
 356         if (dev->data->dev_started) {
 357                 RTE_EDEV_LOG_ERR(
 358                     "device %d must be stopped to allow configuration", dev_id);
 359                 return -EBUSY;
 360         }
 361
 362         if (dev_conf == NULL)
 363                 return -EINVAL;
 364
 365         (*dev->dev_ops->dev_infos_get)(dev, &info);
 366
 367         /* Check dequeue_timeout_ns value is in limit */
 368         if (!(dev_conf->event_dev_cfg & RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT)) {
 369                 if (dev_conf->dequeue_timeout_ns &&
 370                     (dev_conf->dequeue_timeout_ns < info.min_dequeue_timeout_ns
 371                         || dev_conf->dequeue_timeout_ns >
 372                                  info.max_dequeue_timeout_ns)) {
 373                         RTE_EDEV_LOG_ERR("dev%d invalid dequeue_timeout_ns=%d"
 374                         " min_dequeue_timeout_ns=%d max_dequeue_timeout_ns=%d",
 375                         dev_id, dev_conf->dequeue_timeout_ns,
 376                         info.min_dequeue_timeout_ns,
 377                         info.max_dequeue_timeout_ns);
 378                         return -EINVAL;
 379                 }
 380         }
 381
 382         /* Check nb_events_limit is in limit */
 383         if (dev_conf->nb_events_limit > info.max_num_events) {
 384                 RTE_EDEV_LOG_ERR("dev%d nb_events_limit=%d > max_num_events=%d",
 385                 dev_id, dev_conf->nb_events_limit, info.max_num_events);
 386                 return -EINVAL;
 387         }
 388
 389         /* Check nb_event_queues is in limit */
 390         if (!dev_conf->nb_event_queues) {
 391                 RTE_EDEV_LOG_ERR("dev%d nb_event_queues cannot be zero",
 392                                         dev_id);
 393                 return -EINVAL;
 394         }
 395         if (dev_conf->nb_event_queues > info.max_event_queues) {
 396                 RTE_EDEV_LOG_ERR("%d nb_event_queues=%d > max_event_queues=%d",
 397                 dev_id, dev_conf->nb_event_queues, info.max_event_queues);
 398                 return -EINVAL;
 399         }
 400
 401         /* Check nb_event_ports is in limit */
 402         if (!dev_conf->nb_event_ports) {
 403                 RTE_EDEV_LOG_ERR("dev%d nb_event_ports cannot be zero", dev_id);
 404                 return -EINVAL;
 405         }
 406         if (dev_conf->nb_event_ports > info.max_event_ports) {
 407                 RTE_EDEV_LOG_ERR("id%d nb_event_ports=%d > max_event_ports= %d",
 408                 dev_id, dev_conf->nb_event_ports, info.max_event_ports);
 409                 return -EINVAL;
 410         }
 411
 412         /* Check nb_event_queue_flows is in limit */
 413         if (!dev_conf->nb_event_queue_flows) {
 414                 RTE_EDEV_LOG_ERR("dev%d nb_flows cannot be zero", dev_id);
 415                 return -EINVAL;
 416         }
 417         if (dev_conf->nb_event_queue_flows > info.max_event_queue_flows) {
 418                 RTE_EDEV_LOG_ERR("dev%d nb_flows=%x > max_flows=%x",
 419                 dev_id, dev_conf->nb_event_queue_flows,
 420                 info.max_event_queue_flows);
 421                 return -EINVAL;
 422         }
 423
 424         /* Check nb_event_port_dequeue_depth is in limit */
 425         if (!dev_conf->nb_event_port_dequeue_depth) {
 426                 RTE_EDEV_LOG_ERR("dev%d nb_dequeue_depth cannot be zero",
 427                                         dev_id);
 428                 return -EINVAL;
 429         }
 430         if ((info.event_dev_cap & RTE_EVENT_DEV_CAP_BURST_MODE) &&
 431                  (dev_conf->nb_event_port_dequeue_depth >
 432                          info.max_event_port_dequeue_depth)) {
 433                 RTE_EDEV_LOG_ERR("dev%d nb_dq_depth=%d > max_dq_depth=%d",
 434                 dev_id, dev_conf->nb_event_port_dequeue_depth,
 435                 info.max_event_port_dequeue_depth);
 436                 return -EINVAL;
 437         }
 438
 439         /* Check nb_event_port_enqueue_depth is in limit */
 440         if (!dev_conf->nb_event_port_enqueue_depth) {
 441                 RTE_EDEV_LOG_ERR("dev%d nb_enqueue_depth cannot be zero",
 442                                         dev_id);
 443                 return -EINVAL;
 444         }
 445         if ((info.event_dev_cap & RTE_EVENT_DEV_CAP_BURST_MODE) &&
 446                 (dev_conf->nb_event_port_enqueue_depth >
 447                          info.max_event_port_enqueue_depth)) {
 448                 RTE_EDEV_LOG_ERR("dev%d nb_enq_depth=%d > max_enq_depth=%d",
 449                 dev_id, dev_conf->nb_event_port_enqueue_depth,
 450                 info.max_event_port_enqueue_depth);
 451                 return -EINVAL;
 452         }
 453
 454         /* Copy the dev_conf parameter into the dev structure */
 455         memcpy(&dev->data->dev_conf, dev_conf, sizeof(dev->data->dev_conf));
 456
 457         /* Setup new number of queues and reconfigure device. */
 458         diag = rte_event_dev_queue_config(dev, dev_conf->nb_event_queues);
 459         if (diag != 0) {
 460                 RTE_EDEV_LOG_ERR("dev%d rte_event_dev_queue_config = %d",
 461                                 dev_id, diag);
 462                 return diag;
 463         }
 464
 465         /* Setup new number of ports and reconfigure device. */
 466         diag = rte_event_dev_port_config(dev, dev_conf->nb_event_ports);
 467         if (diag != 0) {
 468                 rte_event_dev_queue_config(dev, 0);
 469                 RTE_EDEV_LOG_ERR("dev%d rte_event_dev_port_config = %d",
 470                                 dev_id, diag);
 471                 return diag;
 472         }
 473
 474         /* Configure the device */
 475         diag = (*dev->dev_ops->dev_configure)(dev);
 476         if (diag != 0) {
 477                 RTE_EDEV_LOG_ERR("dev%d dev_configure = %d", dev_id, diag);
 478                 rte_event_dev_queue_config(dev, 0);
 479                 rte_event_dev_port_config(dev, 0);
 480         }
 481
 482         dev->data->event_dev_cap = info.event_dev_cap;
 483         return diag;
 484 }
 485
 486 static inline int
 487 is_valid_queue(struct rte_eventdev *dev, uint8_t queue_id)
 488 {
 489         if (queue_id < dev->data->nb_queues && queue_id <
 490                                 RTE_EVENT_MAX_QUEUES_PER_DEV)
 491                 return 1;
 492         else
 493                 return 0;
 494 }
 495
 496 int
 497 rte_event_queue_default_conf_get(uint8_t dev_id, uint8_t queue_id,
 498                                  struct rte_event_queue_conf *queue_conf)
 499 {
 500         struct rte_eventdev *dev;
 501
 502         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 503         dev = &rte_eventdevs[dev_id];
 504
 505         if (queue_conf == NULL)
 506                 return -EINVAL;
 507
 508         if (!is_valid_queue(dev, queue_id)) {
 509                 RTE_EDEV_LOG_ERR("Invalid queue_id=%" PRIu8, queue_id);
 510                 return -EINVAL;
 511         }
 512
 513         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_def_conf, -ENOTSUP);
 514         memset(queue_conf, 0, sizeof(struct rte_event_queue_conf));
 515         (*dev->dev_ops->queue_def_conf)(dev, queue_id, queue_conf);
 516         return 0;
 517 }
 518
 519 static inline int
 520 is_valid_atomic_queue_conf(const struct rte_event_queue_conf *queue_conf)
 521 {
 522         if (queue_conf &&
 523                 !(queue_conf->event_queue_cfg &
 524                   RTE_EVENT_QUEUE_CFG_SINGLE_LINK) && (
 525                 ((queue_conf->event_queue_cfg &
 526                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 527                         == RTE_EVENT_QUEUE_CFG_ALL_TYPES) ||
 528                 ((queue_conf->event_queue_cfg &
 529                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 530                         == RTE_EVENT_QUEUE_CFG_ATOMIC_ONLY)
 531                 ))
 532                 return 1;
 533         else
 534                 return 0;
 535 }
 536
 537 static inline int
 538 is_valid_ordered_queue_conf(const struct rte_event_queue_conf *queue_conf)
 539 {
 540         if (queue_conf &&
 541                 !(queue_conf->event_queue_cfg &
 542                   RTE_EVENT_QUEUE_CFG_SINGLE_LINK) && (
 543                 ((queue_conf->event_queue_cfg &
 544                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 545                         == RTE_EVENT_QUEUE_CFG_ALL_TYPES) ||
 546                 ((queue_conf->event_queue_cfg &
 547                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 548                         == RTE_EVENT_QUEUE_CFG_ORDERED_ONLY)
 549                 ))
 550                 return 1;
 551         else
 552                 return 0;
 553 }
 554
 555
 556 int
 557 rte_event_queue_setup(uint8_t dev_id, uint8_t queue_id,
 558                       const struct rte_event_queue_conf *queue_conf)
 559 {
 560         struct rte_eventdev *dev;
 561         struct rte_event_queue_conf def_conf;
 562
 563         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 564         dev = &rte_eventdevs[dev_id];
 565
 566         if (!is_valid_queue(dev, queue_id)) {
 567                 RTE_EDEV_LOG_ERR("Invalid queue_id=%" PRIu8, queue_id);
 568                 return -EINVAL;
 569         }
 570
 571         /* Check nb_atomic_flows limit */
 572         if (is_valid_atomic_queue_conf(queue_conf)) {
 573                 if (queue_conf->nb_atomic_flows == 0 ||
 574                     queue_conf->nb_atomic_flows >
 575                         dev->data->dev_conf.nb_event_queue_flows) {
 576                         RTE_EDEV_LOG_ERR(
 577                 "dev%d queue%d Invalid nb_atomic_flows=%d max_flows=%d",
 578                         dev_id, queue_id, queue_conf->nb_atomic_flows,
 579                         dev->data->dev_conf.nb_event_queue_flows);
 580                         return -EINVAL;
 581                 }
 582         }
 583
 584         /* Check nb_atomic_order_sequences limit */
 585         if (is_valid_ordered_queue_conf(queue_conf)) {
 586                 if (queue_conf->nb_atomic_order_sequences == 0 ||
 587                     queue_conf->nb_atomic_order_sequences >
 588                         dev->data->dev_conf.nb_event_queue_flows) {
 589                         RTE_EDEV_LOG_ERR(
 590                 "dev%d queue%d Invalid nb_atomic_order_seq=%d max_flows=%d",
 591                         dev_id, queue_id, queue_conf->nb_atomic_order_sequences,
 592                         dev->data->dev_conf.nb_event_queue_flows);
 593                         return -EINVAL;
 594                 }
 595         }
 596
 597         if (dev->data->dev_started) {
 598                 RTE_EDEV_LOG_ERR(
 599                     "device %d must be stopped to allow queue setup", dev_id);
 600                 return -EBUSY;
 601         }
 602
 603         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_setup, -ENOTSUP);
 604
 605         if (queue_conf == NULL) {
 606                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_def_conf,
 607                                         -ENOTSUP);
 608                 (*dev->dev_ops->queue_def_conf)(dev, queue_id, &def_conf);
 609                 queue_conf = &def_conf;
 610         }
 611
 612         dev->data->queues_prio[queue_id] = queue_conf->priority;
 613         return (*dev->dev_ops->queue_setup)(dev, queue_id, queue_conf);
 614 }
 615
 616 uint8_t
 617 rte_event_queue_count(uint8_t dev_id)
 618 {
 619         struct rte_eventdev *dev;
 620
 621         dev = &rte_eventdevs[dev_id];
 622         return dev->data->nb_queues;
 623 }
 624
 625 uint8_t
 626 rte_event_queue_priority(uint8_t dev_id, uint8_t queue_id)
 627 {
 628         struct rte_eventdev *dev;
 629
 630         dev = &rte_eventdevs[dev_id];
 631         if (dev->data->event_dev_cap & RTE_EVENT_DEV_CAP_QUEUE_QOS)
 632                 return dev->data->queues_prio[queue_id];
 633         else
 634                 return RTE_EVENT_DEV_PRIORITY_NORMAL;
 635 }
 636
 637 static inline int
 638 is_valid_port(struct rte_eventdev *dev, uint8_t port_id)
 639 {
 640         if (port_id < dev->data->nb_ports)
 641                 return 1;
 642         else
 643                 return 0;
 644 }
 645
 646 int
 647 rte_event_port_default_conf_get(uint8_t dev_id, uint8_t port_id,
 648                                  struct rte_event_port_conf *port_conf)
 649 {
 650         struct rte_eventdev *dev;
 651
 652         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 653         dev = &rte_eventdevs[dev_id];
 654
 655         if (port_conf == NULL)
 656                 return -EINVAL;
 657
 658         if (!is_valid_port(dev, port_id)) {
 659                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 660                 return -EINVAL;
 661         }
 662
 663         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_def_conf, -ENOTSUP);
 664         memset(port_conf, 0, sizeof(struct rte_event_port_conf));
 665         (*dev->dev_ops->port_def_conf)(dev, port_id, port_conf);
 666         return 0;
 667 }
 668
 669 int
 670 rte_event_port_setup(uint8_t dev_id, uint8_t port_id,
 671                      const struct rte_event_port_conf *port_conf)
 672 {
 673         struct rte_eventdev *dev;
 674         struct rte_event_port_conf def_conf;
 675         int diag;
 676
 677         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 678         dev = &rte_eventdevs[dev_id];
 679
 680         if (!is_valid_port(dev, port_id)) {
 681                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 682                 return -EINVAL;
 683         }
 684
 685         /* Check new_event_threshold limit */
 686         if ((port_conf && !port_conf->new_event_threshold) ||
 687                         (port_conf && port_conf->new_event_threshold >
 688                                  dev->data->dev_conf.nb_events_limit)) {
 689                 RTE_EDEV_LOG_ERR(
 690                    "dev%d port%d Invalid event_threshold=%d nb_events_limit=%d",
 691                         dev_id, port_id, port_conf->new_event_threshold,
 692                         dev->data->dev_conf.nb_events_limit);
 693                 return -EINVAL;
 694         }
 695
 696         /* Check dequeue_depth limit */
 697         if ((port_conf && !port_conf->dequeue_depth) ||
 698                         (port_conf && port_conf->dequeue_depth >
 699                 dev->data->dev_conf.nb_event_port_dequeue_depth)) {
 700                 RTE_EDEV_LOG_ERR(
 701                    "dev%d port%d Invalid dequeue depth=%d max_dequeue_depth=%d",
 702                         dev_id, port_id, port_conf->dequeue_depth,
 703                         dev->data->dev_conf.nb_event_port_dequeue_depth);
 704                 return -EINVAL;
 705         }
 706
 707         /* Check enqueue_depth limit */
 708         if ((port_conf && !port_conf->enqueue_depth) ||
 709                         (port_conf && port_conf->enqueue_depth >
 710                 dev->data->dev_conf.nb_event_port_enqueue_depth)) {
 711                 RTE_EDEV_LOG_ERR(
 712                    "dev%d port%d Invalid enqueue depth=%d max_enqueue_depth=%d",
 713                         dev_id, port_id, port_conf->enqueue_depth,
 714                         dev->data->dev_conf.nb_event_port_enqueue_depth);
 715                 return -EINVAL;
 716         }
 717
 718         if (dev->data->dev_started) {
 719                 RTE_EDEV_LOG_ERR(
 720                     "device %d must be stopped to allow port setup", dev_id);
 721                 return -EBUSY;
 722         }
 723
 724         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_setup, -ENOTSUP);
 725
 726         if (port_conf == NULL) {
 727                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_def_conf,
 728                                         -ENOTSUP);
 729                 (*dev->dev_ops->port_def_conf)(dev, port_id, &def_conf);
 730                 port_conf = &def_conf;
 731         }
 732
 733         dev->data->ports_dequeue_depth[port_id] =
 734                         port_conf->dequeue_depth;
 735         dev->data->ports_enqueue_depth[port_id] =
 736                         port_conf->enqueue_depth;
 737
 738         diag = (*dev->dev_ops->port_setup)(dev, port_id, port_conf);
 739
 740         /* Unlink all the queues from this port(default state after setup) */
 741         if (!diag)
 742                 diag = rte_event_port_unlink(dev_id, port_id, NULL, 0);
 743
 744         if (diag < 0)
 745                 return diag;
 746
 747         return 0;
 748 }
 749
 750 uint8_t
 751 rte_event_port_dequeue_depth(uint8_t dev_id, uint8_t port_id)
 752 {
 753         struct rte_eventdev *dev;
 754
 755         dev = &rte_eventdevs[dev_id];
 756         return dev->data->ports_dequeue_depth[port_id];
 757 }
 758
 759 uint8_t
 760 rte_event_port_enqueue_depth(uint8_t dev_id, uint8_t port_id)
 761 {
 762         struct rte_eventdev *dev;
 763
 764         dev = &rte_eventdevs[dev_id];
 765         return dev->data->ports_enqueue_depth[port_id];
 766 }
 767
 768 uint8_t
 769 rte_event_port_count(uint8_t dev_id)
 770 {
 771         struct rte_eventdev *dev;
 772
 773         dev = &rte_eventdevs[dev_id];
 774         return dev->data->nb_ports;
 775 }
 776
 777 int
 778 rte_event_port_link(uint8_t dev_id, uint8_t port_id,
 779                     const uint8_t queues[], const uint8_t priorities[],
 780                     uint16_t nb_links)
 781 {
 782         struct rte_eventdev *dev;
 783         uint8_t queues_list[RTE_EVENT_MAX_QUEUES_PER_DEV];
 784         uint8_t priorities_list[RTE_EVENT_MAX_QUEUES_PER_DEV];
 785         uint16_t *links_map;
 786         int i, diag;
 787
 788         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 789         dev = &rte_eventdevs[dev_id];
 790         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_link, -ENOTSUP);
 791
 792         if (!is_valid_port(dev, port_id)) {
 793                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 794                 return -EINVAL;
 795         }
 796
 797         if (queues == NULL) {
 798                 for (i = 0; i < dev->data->nb_queues; i++)
 799                         queues_list[i] = i;
 800
 801                 queues = queues_list;
 802                 nb_links = dev->data->nb_queues;
 803         }
 804
 805         if (priorities == NULL) {
 806                 for (i = 0; i < nb_links; i++)
 807                         priorities_list[i] = RTE_EVENT_DEV_PRIORITY_NORMAL;
 808
 809                 priorities = priorities_list;
 810         }
 811
 812         for (i = 0; i < nb_links; i++)
 813                 if (queues[i] >= dev->data->nb_queues)
 814                         return -EINVAL;
 815
 816         diag = (*dev->dev_ops->port_link)(dev, dev->data->ports[port_id],
 817                                                 queues, priorities, nb_links);
 818         if (diag < 0)
 819                 return diag;
 820
 821         links_map = dev->data->links_map;
 822         /* Point links_map to this port specific area */
 823         links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
 824         for (i = 0; i < diag; i++)
 825                 links_map[queues[i]] = (uint8_t)priorities[i];
 826
 827         return diag;
 828 }
 829
 830 int
 831 rte_event_port_unlink(uint8_t dev_id, uint8_t port_id,
 832                       uint8_t queues[], uint16_t nb_unlinks)
 833 {
 834         struct rte_eventdev *dev;
 835         uint8_t all_queues[RTE_EVENT_MAX_QUEUES_PER_DEV];
 836         int i, diag;
 837         uint16_t *links_map;
 838
 839         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 840         dev = &rte_eventdevs[dev_id];
 841         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_unlink, -ENOTSUP);
 842
 843         if (!is_valid_port(dev, port_id)) {
 844                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 845                 return -EINVAL;
 846         }
 847
 848         if (queues == NULL) {
 849                 for (i = 0; i < dev->data->nb_queues; i++)
 850                         all_queues[i] = i;
 851                 queues = all_queues;
 852                 nb_unlinks = dev->data->nb_queues;
 853         }
 854
 855         for (i = 0; i < nb_unlinks; i++)
 856                 if (queues[i] >= dev->data->nb_queues)
 857                         return -EINVAL;
 858
 859         diag = (*dev->dev_ops->port_unlink)(dev, dev->data->ports[port_id],
 860                                         queues, nb_unlinks);
 861
 862         if (diag < 0)
 863                 return diag;
 864
 865         links_map = dev->data->links_map;
 866         /* Point links_map to this port specific area */
 867         links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
 868         for (i = 0; i < diag; i++)
 869                 links_map[queues[i]] = EVENT_QUEUE_SERVICE_PRIORITY_INVALID;
 870
 871         return diag;
 872 }
 873
 874 int
 875 rte_event_port_links_get(uint8_t dev_id, uint8_t port_id,
 876                          uint8_t queues[], uint8_t priorities[])
 877 {
 878         struct rte_eventdev *dev;
 879         uint16_t *links_map;
 880         int i, count = 0;
 881
 882         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 883         dev = &rte_eventdevs[dev_id];
 884         if (!is_valid_port(dev, port_id)) {
 885                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 886                 return -EINVAL;
 887         }
 888
 889         links_map = dev->data->links_map;
 890         /* Point links_map to this port specific area */
 891         links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
 892         for (i = 0; i < dev->data->nb_queues; i++) {
 893                 if (links_map[i] != EVENT_QUEUE_SERVICE_PRIORITY_INVALID) {
 894                         queues[count] = i;
 895                         priorities[count] = (uint8_t)links_map[i];
 896                         ++count;
 897                 }
 898         }
 899         return count;
 900 }
 901
 902 int
 903 rte_event_dequeue_timeout_ticks(uint8_t dev_id, uint64_t ns,
 904                                  uint64_t *timeout_ticks)
 905 {
 906         struct rte_eventdev *dev;
 907
 908         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 909         dev = &rte_eventdevs[dev_id];
 910         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->timeout_ticks, -ENOTSUP);
 911
 912         if (timeout_ticks == NULL)
 913                 return -EINVAL;
 914
 915         return (*dev->dev_ops->timeout_ticks)(dev, ns, timeout_ticks);
 916 }
 917
 918 int
 919 rte_event_dev_dump(uint8_t dev_id, FILE *f)
 920 {
 921         struct rte_eventdev *dev;
 922
 923         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 924         dev = &rte_eventdevs[dev_id];
 925         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dump, -ENOTSUP);
 926
 927         (*dev->dev_ops->dump)(dev, f);
 928         return 0;
 929
 930 }
 931
 932 static int
 933 xstats_get_count(uint8_t dev_id, enum rte_event_dev_xstats_mode mode,
 934                 uint8_t queue_port_id)
 935 {
 936         struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 937         if (dev->dev_ops->xstats_get_names != NULL)
 938                 return (*dev->dev_ops->xstats_get_names)(dev, mode,
 939                                                         queue_port_id,
 940                                                         NULL, NULL, 0);
 941         return 0;
 942 }
 943
 944 int
 945 rte_event_dev_xstats_names_get(uint8_t dev_id,
 946                 enum rte_event_dev_xstats_mode mode, uint8_t queue_port_id,
 947                 struct rte_event_dev_xstats_name *xstats_names,
 948                 unsigned int *ids, unsigned int size)
 949 {
 950         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -ENODEV);
 951         const int cnt_expected_entries = xstats_get_count(dev_id, mode,
 952                                                           queue_port_id);
 953         if (xstats_names == NULL || cnt_expected_entries < 0 ||
 954                         (int)size < cnt_expected_entries)
 955                 return cnt_expected_entries;
 956
 957         /* dev_id checked above */
 958         const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 959
 960         if (dev->dev_ops->xstats_get_names != NULL)
 961                 return (*dev->dev_ops->xstats_get_names)(dev, mode,
 962                                 queue_port_id, xstats_names, ids, size);
 963
 964         return -ENOTSUP;
 965 }
 966
 967 /* retrieve eventdev extended statistics */
 968 int
 969 rte_event_dev_xstats_get(uint8_t dev_id, enum rte_event_dev_xstats_mode mode,
 970                 uint8_t queue_port_id, const unsigned int ids[],
 971                 uint64_t values[], unsigned int n)
 972 {
 973         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -ENODEV);
 974         const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 975
 976         /* implemented by the driver */
 977         if (dev->dev_ops->xstats_get != NULL)
 978                 return (*dev->dev_ops->xstats_get)(dev, mode, queue_port_id,
 979                                 ids, values, n);
 980         return -ENOTSUP;
 981 }
 982
 983 uint64_t
 984 rte_event_dev_xstats_by_name_get(uint8_t dev_id, const char *name,
 985                 unsigned int *id)
 986 {
 987         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, 0);
 988         const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 989         unsigned int temp = -1;
 990
 991         if (id != NULL)
 992                 *id = (unsigned int)-1;
 993         else
 994                 id = &temp; /* ensure driver never gets a NULL value */
 995
 996         /* implemented by driver */
 997         if (dev->dev_ops->xstats_get_by_name != NULL)
 998                 return (*dev->dev_ops->xstats_get_by_name)(dev, name, id);
 999         return -ENOTSUP;
1000 }
1001
1002 int rte_event_dev_xstats_reset(uint8_t dev_id,
1003                 enum rte_event_dev_xstats_mode mode, int16_t queue_port_id,
1004                 const uint32_t ids[], uint32_t nb_ids)
1005 {
1006         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
1007         struct rte_eventdev *dev = &rte_eventdevs[dev_id];
1008
1009         if (dev->dev_ops->xstats_reset != NULL)
1010                 return (*dev->dev_ops->xstats_reset)(dev, mode, queue_port_id,
1011                                                         ids, nb_ids);
1012         return -ENOTSUP;
1013 }
1014
1015 int
1016 rte_event_dev_start(uint8_t dev_id)
1017 {
1018         struct rte_eventdev *dev;
1019         int diag;
1020
1021         RTE_EDEV_LOG_DEBUG("Start dev_id=%" PRIu8, dev_id);
1022
1023         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
1024         dev = &rte_eventdevs[dev_id];
1025         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_start, -ENOTSUP);
1026
1027         if (dev->data->dev_started != 0) {
1028                 RTE_EDEV_LOG_ERR("Device with dev_id=%" PRIu8 "already started",
1029                         dev_id);
1030                 return 0;
1031         }
1032
1033         diag = (*dev->dev_ops->dev_start)(dev);
1034         if (diag == 0)
1035                 dev->data->dev_started = 1;
1036         else
1037                 return diag;
1038
1039         return 0;
1040 }
1041
1042 void
1043 rte_event_dev_stop(uint8_t dev_id)
1044 {
1045         struct rte_eventdev *dev;
1046
1047         RTE_EDEV_LOG_DEBUG("Stop dev_id=%" PRIu8, dev_id);
1048
1049         RTE_EVENTDEV_VALID_DEVID_OR_RET(dev_id);
1050         dev = &rte_eventdevs[dev_id];
1051         RTE_FUNC_PTR_OR_RET(*dev->dev_ops->dev_stop);
1052
1053         if (dev->data->dev_started == 0) {
1054                 RTE_EDEV_LOG_ERR("Device with dev_id=%" PRIu8 "already stopped",
1055                         dev_id);
1056                 return;
1057         }
1058
1059         dev->data->dev_started = 0;
1060         (*dev->dev_ops->dev_stop)(dev);
1061 }
1062
1063 int
1064 rte_event_dev_close(uint8_t dev_id)
1065 {
1066         struct rte_eventdev *dev;
1067
1068         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
1069         dev = &rte_eventdevs[dev_id];
1070         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_close, -ENOTSUP);
1071
1072         /* Device must be stopped before it can be closed */
1073         if (dev->data->dev_started == 1) {
1074                 RTE_EDEV_LOG_ERR("Device %u must be stopped before closing",
1075                                 dev_id);
1076                 return -EBUSY;
1077         }
1078
1079         return (*dev->dev_ops->dev_close)(dev);
1080 }
1081
1082 static inline int
1083 rte_eventdev_data_alloc(uint8_t dev_id, struct rte_eventdev_data **data,
1084                 int socket_id)
1085 {
1086         char mz_name[RTE_EVENTDEV_NAME_MAX_LEN];
1087         const struct rte_memzone *mz;
1088         int n;
1089
1090         /* Generate memzone name */
1091         n = snprintf(mz_name, sizeof(mz_name), "rte_eventdev_data_%u", dev_id);
1092         if (n >= (int)sizeof(mz_name))
1093                 return -EINVAL;
1094
1095         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1096                 mz = rte_memzone_reserve(mz_name,
1097                                 sizeof(struct rte_eventdev_data),
1098                                 socket_id, 0);
1099         } else
1100                 mz = rte_memzone_lookup(mz_name);
1101
1102         if (mz == NULL)
1103                 return -ENOMEM;
1104
1105         *data = mz->addr;
1106         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
1107                 memset(*data, 0, sizeof(struct rte_eventdev_data));
1108
1109         return 0;
1110 }
1111
1112 static inline uint8_t
1113 rte_eventdev_find_free_device_index(void)
1114 {
1115         uint8_t dev_id;
1116
1117         for (dev_id = 0; dev_id < RTE_EVENT_MAX_DEVS; dev_id++) {
1118                 if (rte_eventdevs[dev_id].attached ==
1119                                 RTE_EVENTDEV_DETACHED)
1120                         return dev_id;
1121         }
1122         return RTE_EVENT_MAX_DEVS;
1123 }
1124
1125 struct rte_eventdev *
1126 rte_event_pmd_allocate(const char *name, int socket_id)
1127 {
1128         struct rte_eventdev *eventdev;
1129         uint8_t dev_id;
1130
1131         if (rte_event_pmd_get_named_dev(name) != NULL) {
1132                 RTE_EDEV_LOG_ERR("Event device with name %s already "
1133                                 "allocated!", name);
1134                 return NULL;
1135         }
1136
1137         dev_id = rte_eventdev_find_free_device_index();
1138         if (dev_id == RTE_EVENT_MAX_DEVS) {
1139                 RTE_EDEV_LOG_ERR("Reached maximum number of event devices");
1140                 return NULL;
1141         }
1142
1143         eventdev = &rte_eventdevs[dev_id];
1144
1145         if (eventdev->data == NULL) {
1146                 struct rte_eventdev_data *eventdev_data = NULL;
1147
1148                 int retval = rte_eventdev_data_alloc(dev_id, &eventdev_data,
1149                                 socket_id);
1150
1151                 if (retval < 0 || eventdev_data == NULL)
1152                         return NULL;
1153
1154                 eventdev->data = eventdev_data;
1155
1156                 snprintf(eventdev->data->name, RTE_EVENTDEV_NAME_MAX_LEN,
1157                                 "%s", name);
1158
1159                 eventdev->data->dev_id = dev_id;
1160                 eventdev->data->socket_id = socket_id;
1161                 eventdev->data->dev_started = 0;
1162
1163                 eventdev->attached = RTE_EVENTDEV_ATTACHED;
1164
1165                 eventdev_globals.nb_devs++;
1166         }
1167
1168         return eventdev;
1169 }
1170
1171 int
1172 rte_event_pmd_release(struct rte_eventdev *eventdev)
1173 {
1174         int ret;
1175         char mz_name[RTE_EVENTDEV_NAME_MAX_LEN];
1176         const struct rte_memzone *mz;
1177
1178         if (eventdev == NULL)
1179                 return -EINVAL;
1180
1181         eventdev->attached = RTE_EVENTDEV_DETACHED;
1182         eventdev_globals.nb_devs--;
1183
1184         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1185                 rte_free(eventdev->data->dev_private);
1186
1187                 /* Generate memzone name */
1188                 ret = snprintf(mz_name, sizeof(mz_name), "rte_eventdev_data_%u",
1189                                 eventdev->data->dev_id);
1190                 if (ret >= (int)sizeof(mz_name))
1191                         return -EINVAL;
1192
1193                 mz = rte_memzone_lookup(mz_name);
1194                 if (mz == NULL)
1195                         return -ENOMEM;
1196
1197                 ret = rte_memzone_free(mz);
1198                 if (ret)
1199                         return ret;
1200         }
1201
1202         eventdev->data = NULL;
1203         return 0;
1204 }