lib/librte_eventdev/rte_eventdev.c

   1 /*
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 Cavium networks. 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 networks 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 (dev->data->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 < info.min_dequeue_timeout_ns
 370                         || dev_conf->dequeue_timeout_ns >
 371                                  info.max_dequeue_timeout_ns) {
 372                         RTE_EDEV_LOG_ERR("dev%d invalid dequeue_timeout_ns=%d"
 373                         " min_dequeue_timeout_ns=%d max_dequeue_timeout_ns=%d",
 374                         dev_id, dev_conf->dequeue_timeout_ns,
 375                         info.min_dequeue_timeout_ns,
 376                         info.max_dequeue_timeout_ns);
 377                         return -EINVAL;
 378                 }
 379         }
 380
 381         /* Check nb_events_limit is in limit */
 382         if (dev_conf->nb_events_limit > info.max_num_events) {
 383                 RTE_EDEV_LOG_ERR("dev%d nb_events_limit=%d > max_num_events=%d",
 384                 dev_id, dev_conf->nb_events_limit, info.max_num_events);
 385                 return -EINVAL;
 386         }
 387
 388         /* Check nb_event_queues is in limit */
 389         if (!dev_conf->nb_event_queues) {
 390                 RTE_EDEV_LOG_ERR("dev%d nb_event_queues cannot be zero",
 391                                         dev_id);
 392                 return -EINVAL;
 393         }
 394         if (dev_conf->nb_event_queues > info.max_event_queues) {
 395                 RTE_EDEV_LOG_ERR("%d nb_event_queues=%d > max_event_queues=%d",
 396                 dev_id, dev_conf->nb_event_queues, info.max_event_queues);
 397                 return -EINVAL;
 398         }
 399
 400         /* Check nb_event_ports is in limit */
 401         if (!dev_conf->nb_event_ports) {
 402                 RTE_EDEV_LOG_ERR("dev%d nb_event_ports cannot be zero", dev_id);
 403                 return -EINVAL;
 404         }
 405         if (dev_conf->nb_event_ports > info.max_event_ports) {
 406                 RTE_EDEV_LOG_ERR("id%d nb_event_ports=%d > max_event_ports= %d",
 407                 dev_id, dev_conf->nb_event_ports, info.max_event_ports);
 408                 return -EINVAL;
 409         }
 410
 411         /* Check nb_event_queue_flows is in limit */
 412         if (!dev_conf->nb_event_queue_flows) {
 413                 RTE_EDEV_LOG_ERR("dev%d nb_flows cannot be zero", dev_id);
 414                 return -EINVAL;
 415         }
 416         if (dev_conf->nb_event_queue_flows > info.max_event_queue_flows) {
 417                 RTE_EDEV_LOG_ERR("dev%d nb_flows=%x > max_flows=%x",
 418                 dev_id, dev_conf->nb_event_queue_flows,
 419                 info.max_event_queue_flows);
 420                 return -EINVAL;
 421         }
 422
 423         /* Check nb_event_port_dequeue_depth is in limit */
 424         if (!dev_conf->nb_event_port_dequeue_depth) {
 425                 RTE_EDEV_LOG_ERR("dev%d nb_dequeue_depth cannot be zero",
 426                                         dev_id);
 427                 return -EINVAL;
 428         }
 429         if ((info.event_dev_cap & RTE_EVENT_DEV_CAP_BURST_MODE) &&
 430                  (dev_conf->nb_event_port_dequeue_depth >
 431                          info.max_event_port_dequeue_depth)) {
 432                 RTE_EDEV_LOG_ERR("dev%d nb_dq_depth=%d > max_dq_depth=%d",
 433                 dev_id, dev_conf->nb_event_port_dequeue_depth,
 434                 info.max_event_port_dequeue_depth);
 435                 return -EINVAL;
 436         }
 437
 438         /* Check nb_event_port_enqueue_depth is in limit */
 439         if (!dev_conf->nb_event_port_enqueue_depth) {
 440                 RTE_EDEV_LOG_ERR("dev%d nb_enqueue_depth cannot be zero",
 441                                         dev_id);
 442                 return -EINVAL;
 443         }
 444         if ((info.event_dev_cap & RTE_EVENT_DEV_CAP_BURST_MODE) &&
 445                 (dev_conf->nb_event_port_enqueue_depth >
 446                          info.max_event_port_enqueue_depth)) {
 447                 RTE_EDEV_LOG_ERR("dev%d nb_enq_depth=%d > max_enq_depth=%d",
 448                 dev_id, dev_conf->nb_event_port_enqueue_depth,
 449                 info.max_event_port_enqueue_depth);
 450                 return -EINVAL;
 451         }
 452
 453         /* Copy the dev_conf parameter into the dev structure */
 454         memcpy(&dev->data->dev_conf, dev_conf, sizeof(dev->data->dev_conf));
 455
 456         /* Setup new number of queues and reconfigure device. */
 457         diag = rte_event_dev_queue_config(dev, dev_conf->nb_event_queues);
 458         if (diag != 0) {
 459                 RTE_EDEV_LOG_ERR("dev%d rte_event_dev_queue_config = %d",
 460                                 dev_id, diag);
 461                 return diag;
 462         }
 463
 464         /* Setup new number of ports and reconfigure device. */
 465         diag = rte_event_dev_port_config(dev, dev_conf->nb_event_ports);
 466         if (diag != 0) {
 467                 rte_event_dev_queue_config(dev, 0);
 468                 RTE_EDEV_LOG_ERR("dev%d rte_event_dev_port_config = %d",
 469                                 dev_id, diag);
 470                 return diag;
 471         }
 472
 473         /* Configure the device */
 474         diag = (*dev->dev_ops->dev_configure)(dev);
 475         if (diag != 0) {
 476                 RTE_EDEV_LOG_ERR("dev%d dev_configure = %d", dev_id, diag);
 477                 rte_event_dev_queue_config(dev, 0);
 478                 rte_event_dev_port_config(dev, 0);
 479         }
 480
 481         dev->data->event_dev_cap = info.event_dev_cap;
 482         return diag;
 483 }
 484
 485 static inline int
 486 is_valid_queue(struct rte_eventdev *dev, uint8_t queue_id)
 487 {
 488         if (queue_id < dev->data->nb_queues && queue_id <
 489                                 RTE_EVENT_MAX_QUEUES_PER_DEV)
 490                 return 1;
 491         else
 492                 return 0;
 493 }
 494
 495 int
 496 rte_event_queue_default_conf_get(uint8_t dev_id, uint8_t queue_id,
 497                                  struct rte_event_queue_conf *queue_conf)
 498 {
 499         struct rte_eventdev *dev;
 500
 501         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 502         dev = &rte_eventdevs[dev_id];
 503
 504         if (queue_conf == NULL)
 505                 return -EINVAL;
 506
 507         if (!is_valid_queue(dev, queue_id)) {
 508                 RTE_EDEV_LOG_ERR("Invalid queue_id=%" PRIu8, queue_id);
 509                 return -EINVAL;
 510         }
 511
 512         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_def_conf, -ENOTSUP);
 513         memset(queue_conf, 0, sizeof(struct rte_event_queue_conf));
 514         (*dev->dev_ops->queue_def_conf)(dev, queue_id, queue_conf);
 515         return 0;
 516 }
 517
 518 static inline int
 519 is_valid_atomic_queue_conf(const struct rte_event_queue_conf *queue_conf)
 520 {
 521         if (queue_conf && (
 522                 ((queue_conf->event_queue_cfg &
 523                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 524                         == RTE_EVENT_QUEUE_CFG_ALL_TYPES) ||
 525                 ((queue_conf->event_queue_cfg &
 526                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 527                         == RTE_EVENT_QUEUE_CFG_ATOMIC_ONLY)
 528                 ))
 529                 return 1;
 530         else
 531                 return 0;
 532 }
 533
 534 static inline int
 535 is_valid_ordered_queue_conf(const struct rte_event_queue_conf *queue_conf)
 536 {
 537         if (queue_conf && (
 538                 ((queue_conf->event_queue_cfg &
 539                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 540                         == RTE_EVENT_QUEUE_CFG_ALL_TYPES) ||
 541                 ((queue_conf->event_queue_cfg &
 542                         RTE_EVENT_QUEUE_CFG_TYPE_MASK)
 543                         == RTE_EVENT_QUEUE_CFG_ORDERED_ONLY)
 544                 ))
 545                 return 1;
 546         else
 547                 return 0;
 548 }
 549
 550
 551 int
 552 rte_event_queue_setup(uint8_t dev_id, uint8_t queue_id,
 553                       const struct rte_event_queue_conf *queue_conf)
 554 {
 555         struct rte_eventdev *dev;
 556         struct rte_event_queue_conf def_conf;
 557
 558         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 559         dev = &rte_eventdevs[dev_id];
 560
 561         if (!is_valid_queue(dev, queue_id)) {
 562                 RTE_EDEV_LOG_ERR("Invalid queue_id=%" PRIu8, queue_id);
 563                 return -EINVAL;
 564         }
 565
 566         /* Check nb_atomic_flows limit */
 567         if (is_valid_atomic_queue_conf(queue_conf)) {
 568                 if (queue_conf->nb_atomic_flows == 0 ||
 569                     queue_conf->nb_atomic_flows >
 570                         dev->data->dev_conf.nb_event_queue_flows) {
 571                         RTE_EDEV_LOG_ERR(
 572                 "dev%d queue%d Invalid nb_atomic_flows=%d max_flows=%d",
 573                         dev_id, queue_id, queue_conf->nb_atomic_flows,
 574                         dev->data->dev_conf.nb_event_queue_flows);
 575                         return -EINVAL;
 576                 }
 577         }
 578
 579         /* Check nb_atomic_order_sequences limit */
 580         if (is_valid_ordered_queue_conf(queue_conf)) {
 581                 if (queue_conf->nb_atomic_order_sequences == 0 ||
 582                     queue_conf->nb_atomic_order_sequences >
 583                         dev->data->dev_conf.nb_event_queue_flows) {
 584                         RTE_EDEV_LOG_ERR(
 585                 "dev%d queue%d Invalid nb_atomic_order_seq=%d max_flows=%d",
 586                         dev_id, queue_id, queue_conf->nb_atomic_order_sequences,
 587                         dev->data->dev_conf.nb_event_queue_flows);
 588                         return -EINVAL;
 589                 }
 590         }
 591
 592         if (dev->data->dev_started) {
 593                 RTE_EDEV_LOG_ERR(
 594                     "device %d must be stopped to allow queue setup", dev_id);
 595                 return -EBUSY;
 596         }
 597
 598         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_setup, -ENOTSUP);
 599
 600         if (queue_conf == NULL) {
 601                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_def_conf,
 602                                         -ENOTSUP);
 603                 (*dev->dev_ops->queue_def_conf)(dev, queue_id, &def_conf);
 604                 queue_conf = &def_conf;
 605         }
 606
 607         dev->data->queues_prio[queue_id] = queue_conf->priority;
 608         return (*dev->dev_ops->queue_setup)(dev, queue_id, queue_conf);
 609 }
 610
 611 uint8_t
 612 rte_event_queue_count(uint8_t dev_id)
 613 {
 614         struct rte_eventdev *dev;
 615
 616         dev = &rte_eventdevs[dev_id];
 617         return dev->data->nb_queues;
 618 }
 619
 620 uint8_t
 621 rte_event_queue_priority(uint8_t dev_id, uint8_t queue_id)
 622 {
 623         struct rte_eventdev *dev;
 624
 625         dev = &rte_eventdevs[dev_id];
 626         if (dev->data->event_dev_cap & RTE_EVENT_DEV_CAP_QUEUE_QOS)
 627                 return dev->data->queues_prio[queue_id];
 628         else
 629                 return RTE_EVENT_DEV_PRIORITY_NORMAL;
 630 }
 631
 632 static inline int
 633 is_valid_port(struct rte_eventdev *dev, uint8_t port_id)
 634 {
 635         if (port_id < dev->data->nb_ports)
 636                 return 1;
 637         else
 638                 return 0;
 639 }
 640
 641 int
 642 rte_event_port_default_conf_get(uint8_t dev_id, uint8_t port_id,
 643                                  struct rte_event_port_conf *port_conf)
 644 {
 645         struct rte_eventdev *dev;
 646
 647         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 648         dev = &rte_eventdevs[dev_id];
 649
 650         if (port_conf == NULL)
 651                 return -EINVAL;
 652
 653         if (!is_valid_port(dev, port_id)) {
 654                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 655                 return -EINVAL;
 656         }
 657
 658         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_def_conf, -ENOTSUP);
 659         memset(port_conf, 0, sizeof(struct rte_event_port_conf));
 660         (*dev->dev_ops->port_def_conf)(dev, port_id, port_conf);
 661         return 0;
 662 }
 663
 664 int
 665 rte_event_port_setup(uint8_t dev_id, uint8_t port_id,
 666                      const struct rte_event_port_conf *port_conf)
 667 {
 668         struct rte_eventdev *dev;
 669         struct rte_event_port_conf def_conf;
 670         int diag;
 671
 672         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 673         dev = &rte_eventdevs[dev_id];
 674
 675         if (!is_valid_port(dev, port_id)) {
 676                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 677                 return -EINVAL;
 678         }
 679
 680         /* Check new_event_threshold limit */
 681         if ((port_conf && !port_conf->new_event_threshold) ||
 682                         (port_conf && port_conf->new_event_threshold >
 683                                  dev->data->dev_conf.nb_events_limit)) {
 684                 RTE_EDEV_LOG_ERR(
 685                    "dev%d port%d Invalid event_threshold=%d nb_events_limit=%d",
 686                         dev_id, port_id, port_conf->new_event_threshold,
 687                         dev->data->dev_conf.nb_events_limit);
 688                 return -EINVAL;
 689         }
 690
 691         /* Check dequeue_depth limit */
 692         if ((port_conf && !port_conf->dequeue_depth) ||
 693                         (port_conf && port_conf->dequeue_depth >
 694                 dev->data->dev_conf.nb_event_port_dequeue_depth)) {
 695                 RTE_EDEV_LOG_ERR(
 696                    "dev%d port%d Invalid dequeue depth=%d max_dequeue_depth=%d",
 697                         dev_id, port_id, port_conf->dequeue_depth,
 698                         dev->data->dev_conf.nb_event_port_dequeue_depth);
 699                 return -EINVAL;
 700         }
 701
 702         /* Check enqueue_depth limit */
 703         if ((port_conf && !port_conf->enqueue_depth) ||
 704                         (port_conf && port_conf->enqueue_depth >
 705                 dev->data->dev_conf.nb_event_port_enqueue_depth)) {
 706                 RTE_EDEV_LOG_ERR(
 707                    "dev%d port%d Invalid enqueue depth=%d max_enqueue_depth=%d",
 708                         dev_id, port_id, port_conf->enqueue_depth,
 709                         dev->data->dev_conf.nb_event_port_enqueue_depth);
 710                 return -EINVAL;
 711         }
 712
 713         if (dev->data->dev_started) {
 714                 RTE_EDEV_LOG_ERR(
 715                     "device %d must be stopped to allow port setup", dev_id);
 716                 return -EBUSY;
 717         }
 718
 719         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_setup, -ENOTSUP);
 720
 721         if (port_conf == NULL) {
 722                 RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_def_conf,
 723                                         -ENOTSUP);
 724                 (*dev->dev_ops->port_def_conf)(dev, port_id, &def_conf);
 725                 port_conf = &def_conf;
 726         }
 727
 728         dev->data->ports_dequeue_depth[port_id] =
 729                         port_conf->dequeue_depth;
 730         dev->data->ports_enqueue_depth[port_id] =
 731                         port_conf->enqueue_depth;
 732
 733         diag = (*dev->dev_ops->port_setup)(dev, port_id, port_conf);
 734
 735         /* Unlink all the queues from this port(default state after setup) */
 736         if (!diag)
 737                 diag = rte_event_port_unlink(dev_id, port_id, NULL, 0);
 738
 739         if (diag < 0)
 740                 return diag;
 741
 742         return 0;
 743 }
 744
 745 uint8_t
 746 rte_event_port_dequeue_depth(uint8_t dev_id, uint8_t port_id)
 747 {
 748         struct rte_eventdev *dev;
 749
 750         dev = &rte_eventdevs[dev_id];
 751         return dev->data->ports_dequeue_depth[port_id];
 752 }
 753
 754 uint8_t
 755 rte_event_port_enqueue_depth(uint8_t dev_id, uint8_t port_id)
 756 {
 757         struct rte_eventdev *dev;
 758
 759         dev = &rte_eventdevs[dev_id];
 760         return dev->data->ports_enqueue_depth[port_id];
 761 }
 762
 763 uint8_t
 764 rte_event_port_count(uint8_t dev_id)
 765 {
 766         struct rte_eventdev *dev;
 767
 768         dev = &rte_eventdevs[dev_id];
 769         return dev->data->nb_ports;
 770 }
 771
 772 int
 773 rte_event_port_link(uint8_t dev_id, uint8_t port_id,
 774                     const uint8_t queues[], const uint8_t priorities[],
 775                     uint16_t nb_links)
 776 {
 777         struct rte_eventdev *dev;
 778         uint8_t queues_list[RTE_EVENT_MAX_QUEUES_PER_DEV];
 779         uint8_t priorities_list[RTE_EVENT_MAX_QUEUES_PER_DEV];
 780         uint16_t *links_map;
 781         int i, diag;
 782
 783         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 784         dev = &rte_eventdevs[dev_id];
 785         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_link, -ENOTSUP);
 786
 787         if (!is_valid_port(dev, port_id)) {
 788                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 789                 return -EINVAL;
 790         }
 791
 792         if (queues == NULL) {
 793                 for (i = 0; i < dev->data->nb_queues; i++)
 794                         queues_list[i] = i;
 795
 796                 queues = queues_list;
 797                 nb_links = dev->data->nb_queues;
 798         }
 799
 800         if (priorities == NULL) {
 801                 for (i = 0; i < nb_links; i++)
 802                         priorities_list[i] = RTE_EVENT_DEV_PRIORITY_NORMAL;
 803
 804                 priorities = priorities_list;
 805         }
 806
 807         for (i = 0; i < nb_links; i++)
 808                 if (queues[i] >= dev->data->nb_queues)
 809                         return -EINVAL;
 810
 811         diag = (*dev->dev_ops->port_link)(dev, dev->data->ports[port_id],
 812                                                 queues, priorities, nb_links);
 813         if (diag < 0)
 814                 return diag;
 815
 816         links_map = dev->data->links_map;
 817         /* Point links_map to this port specific area */
 818         links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
 819         for (i = 0; i < diag; i++)
 820                 links_map[queues[i]] = (uint8_t)priorities[i];
 821
 822         return diag;
 823 }
 824
 825 int
 826 rte_event_port_unlink(uint8_t dev_id, uint8_t port_id,
 827                       uint8_t queues[], uint16_t nb_unlinks)
 828 {
 829         struct rte_eventdev *dev;
 830         uint8_t all_queues[RTE_EVENT_MAX_QUEUES_PER_DEV];
 831         int i, diag;
 832         uint16_t *links_map;
 833
 834         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 835         dev = &rte_eventdevs[dev_id];
 836         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->port_unlink, -ENOTSUP);
 837
 838         if (!is_valid_port(dev, port_id)) {
 839                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 840                 return -EINVAL;
 841         }
 842
 843         if (queues == NULL) {
 844                 for (i = 0; i < dev->data->nb_queues; i++)
 845                         all_queues[i] = i;
 846                 queues = all_queues;
 847                 nb_unlinks = dev->data->nb_queues;
 848         }
 849
 850         for (i = 0; i < nb_unlinks; i++)
 851                 if (queues[i] >= dev->data->nb_queues)
 852                         return -EINVAL;
 853
 854         diag = (*dev->dev_ops->port_unlink)(dev, dev->data->ports[port_id],
 855                                         queues, nb_unlinks);
 856
 857         if (diag < 0)
 858                 return diag;
 859
 860         links_map = dev->data->links_map;
 861         /* Point links_map to this port specific area */
 862         links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
 863         for (i = 0; i < diag; i++)
 864                 links_map[queues[i]] = EVENT_QUEUE_SERVICE_PRIORITY_INVALID;
 865
 866         return diag;
 867 }
 868
 869 int
 870 rte_event_port_links_get(uint8_t dev_id, uint8_t port_id,
 871                          uint8_t queues[], uint8_t priorities[])
 872 {
 873         struct rte_eventdev *dev;
 874         uint16_t *links_map;
 875         int i, count = 0;
 876
 877         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 878         dev = &rte_eventdevs[dev_id];
 879         if (!is_valid_port(dev, port_id)) {
 880                 RTE_EDEV_LOG_ERR("Invalid port_id=%" PRIu8, port_id);
 881                 return -EINVAL;
 882         }
 883
 884         links_map = dev->data->links_map;
 885         /* Point links_map to this port specific area */
 886         links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
 887         for (i = 0; i < dev->data->nb_queues; i++) {
 888                 if (links_map[i] != EVENT_QUEUE_SERVICE_PRIORITY_INVALID) {
 889                         queues[count] = i;
 890                         priorities[count] = (uint8_t)links_map[i];
 891                         ++count;
 892                 }
 893         }
 894         return count;
 895 }
 896
 897 int
 898 rte_event_dequeue_timeout_ticks(uint8_t dev_id, uint64_t ns,
 899                                  uint64_t *timeout_ticks)
 900 {
 901         struct rte_eventdev *dev;
 902
 903         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 904         dev = &rte_eventdevs[dev_id];
 905         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->timeout_ticks, -ENOTSUP);
 906
 907         if (timeout_ticks == NULL)
 908                 return -EINVAL;
 909
 910         return (*dev->dev_ops->timeout_ticks)(dev, ns, timeout_ticks);
 911 }
 912
 913 int
 914 rte_event_dev_dump(uint8_t dev_id, FILE *f)
 915 {
 916         struct rte_eventdev *dev;
 917
 918         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
 919         dev = &rte_eventdevs[dev_id];
 920         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dump, -ENOTSUP);
 921
 922         (*dev->dev_ops->dump)(dev, f);
 923         return 0;
 924
 925 }
 926
 927 static int
 928 xstats_get_count(uint8_t dev_id, enum rte_event_dev_xstats_mode mode,
 929                 uint8_t queue_port_id)
 930 {
 931         struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 932         if (dev->dev_ops->xstats_get_names != NULL)
 933                 return (*dev->dev_ops->xstats_get_names)(dev, mode,
 934                                                         queue_port_id,
 935                                                         NULL, NULL, 0);
 936         return 0;
 937 }
 938
 939 int
 940 rte_event_dev_xstats_names_get(uint8_t dev_id,
 941                 enum rte_event_dev_xstats_mode mode, uint8_t queue_port_id,
 942                 struct rte_event_dev_xstats_name *xstats_names,
 943                 unsigned int *ids, unsigned int size)
 944 {
 945         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -ENODEV);
 946         const int cnt_expected_entries = xstats_get_count(dev_id, mode,
 947                                                           queue_port_id);
 948         if (xstats_names == NULL || cnt_expected_entries < 0 ||
 949                         (int)size < cnt_expected_entries)
 950                 return cnt_expected_entries;
 951
 952         /* dev_id checked above */
 953         const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 954
 955         if (dev->dev_ops->xstats_get_names != NULL)
 956                 return (*dev->dev_ops->xstats_get_names)(dev, mode,
 957                                 queue_port_id, xstats_names, ids, size);
 958
 959         return -ENOTSUP;
 960 }
 961
 962 /* retrieve eventdev extended statistics */
 963 int
 964 rte_event_dev_xstats_get(uint8_t dev_id, enum rte_event_dev_xstats_mode mode,
 965                 uint8_t queue_port_id, const unsigned int ids[],
 966                 uint64_t values[], unsigned int n)
 967 {
 968         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -ENODEV);
 969         const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 970
 971         /* implemented by the driver */
 972         if (dev->dev_ops->xstats_get != NULL)
 973                 return (*dev->dev_ops->xstats_get)(dev, mode, queue_port_id,
 974                                 ids, values, n);
 975         return -ENOTSUP;
 976 }
 977
 978 uint64_t
 979 rte_event_dev_xstats_by_name_get(uint8_t dev_id, const char *name,
 980                 unsigned int *id)
 981 {
 982         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, 0);
 983         const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 984         unsigned int temp = -1;
 985
 986         if (id != NULL)
 987                 *id = (unsigned int)-1;
 988         else
 989                 id = &temp; /* ensure driver never gets a NULL value */
 990
 991         /* implemented by driver */
 992         if (dev->dev_ops->xstats_get_by_name != NULL)
 993                 return (*dev->dev_ops->xstats_get_by_name)(dev, name, id);
 994         return -ENOTSUP;
 995 }
 996
 997 int rte_event_dev_xstats_reset(uint8_t dev_id,
 998                 enum rte_event_dev_xstats_mode mode, int16_t queue_port_id,
 999                 const uint32_t ids[], uint32_t nb_ids)
1000 {
1001         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
1002         struct rte_eventdev *dev = &rte_eventdevs[dev_id];
1003
1004         if (dev->dev_ops->xstats_reset != NULL)
1005                 return (*dev->dev_ops->xstats_reset)(dev, mode, queue_port_id,
1006                                                         ids, nb_ids);
1007         return -ENOTSUP;
1008 }
1009
1010 int
1011 rte_event_dev_start(uint8_t dev_id)
1012 {
1013         struct rte_eventdev *dev;
1014         int diag;
1015
1016         RTE_EDEV_LOG_DEBUG("Start dev_id=%" PRIu8, dev_id);
1017
1018         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
1019         dev = &rte_eventdevs[dev_id];
1020         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_start, -ENOTSUP);
1021
1022         if (dev->data->dev_started != 0) {
1023                 RTE_EDEV_LOG_ERR("Device with dev_id=%" PRIu8 "already started",
1024                         dev_id);
1025                 return 0;
1026         }
1027
1028         diag = (*dev->dev_ops->dev_start)(dev);
1029         if (diag == 0)
1030                 dev->data->dev_started = 1;
1031         else
1032                 return diag;
1033
1034         return 0;
1035 }
1036
1037 void
1038 rte_event_dev_stop(uint8_t dev_id)
1039 {
1040         struct rte_eventdev *dev;
1041
1042         RTE_EDEV_LOG_DEBUG("Stop dev_id=%" PRIu8, dev_id);
1043
1044         RTE_EVENTDEV_VALID_DEVID_OR_RET(dev_id);
1045         dev = &rte_eventdevs[dev_id];
1046         RTE_FUNC_PTR_OR_RET(*dev->dev_ops->dev_stop);
1047
1048         if (dev->data->dev_started == 0) {
1049                 RTE_EDEV_LOG_ERR("Device with dev_id=%" PRIu8 "already stopped",
1050                         dev_id);
1051                 return;
1052         }
1053
1054         dev->data->dev_started = 0;
1055         (*dev->dev_ops->dev_stop)(dev);
1056 }
1057
1058 int
1059 rte_event_dev_close(uint8_t dev_id)
1060 {
1061         struct rte_eventdev *dev;
1062
1063         RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
1064         dev = &rte_eventdevs[dev_id];
1065         RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_close, -ENOTSUP);
1066
1067         /* Device must be stopped before it can be closed */
1068         if (dev->data->dev_started == 1) {
1069                 RTE_EDEV_LOG_ERR("Device %u must be stopped before closing",
1070                                 dev_id);
1071                 return -EBUSY;
1072         }
1073
1074         return (*dev->dev_ops->dev_close)(dev);
1075 }
1076
1077 static inline int
1078 rte_eventdev_data_alloc(uint8_t dev_id, struct rte_eventdev_data **data,
1079                 int socket_id)
1080 {
1081         char mz_name[RTE_EVENTDEV_NAME_MAX_LEN];
1082         const struct rte_memzone *mz;
1083         int n;
1084
1085         /* Generate memzone name */
1086         n = snprintf(mz_name, sizeof(mz_name), "rte_eventdev_data_%u", dev_id);
1087         if (n >= (int)sizeof(mz_name))
1088                 return -EINVAL;
1089
1090         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1091                 mz = rte_memzone_reserve(mz_name,
1092                                 sizeof(struct rte_eventdev_data),
1093                                 socket_id, 0);
1094         } else
1095                 mz = rte_memzone_lookup(mz_name);
1096
1097         if (mz == NULL)
1098                 return -ENOMEM;
1099
1100         *data = mz->addr;
1101         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
1102                 memset(*data, 0, sizeof(struct rte_eventdev_data));
1103
1104         return 0;
1105 }
1106
1107 static inline uint8_t
1108 rte_eventdev_find_free_device_index(void)
1109 {
1110         uint8_t dev_id;
1111
1112         for (dev_id = 0; dev_id < RTE_EVENT_MAX_DEVS; dev_id++) {
1113                 if (rte_eventdevs[dev_id].attached ==
1114                                 RTE_EVENTDEV_DETACHED)
1115                         return dev_id;
1116         }
1117         return RTE_EVENT_MAX_DEVS;
1118 }
1119
1120 struct rte_eventdev *
1121 rte_event_pmd_allocate(const char *name, int socket_id)
1122 {
1123         struct rte_eventdev *eventdev;
1124         uint8_t dev_id;
1125
1126         if (rte_event_pmd_get_named_dev(name) != NULL) {
1127                 RTE_EDEV_LOG_ERR("Event device with name %s already "
1128                                 "allocated!", name);
1129                 return NULL;
1130         }
1131
1132         dev_id = rte_eventdev_find_free_device_index();
1133         if (dev_id == RTE_EVENT_MAX_DEVS) {
1134                 RTE_EDEV_LOG_ERR("Reached maximum number of event devices");
1135                 return NULL;
1136         }
1137
1138         eventdev = &rte_eventdevs[dev_id];
1139
1140         if (eventdev->data == NULL) {
1141                 struct rte_eventdev_data *eventdev_data = NULL;
1142
1143                 int retval = rte_eventdev_data_alloc(dev_id, &eventdev_data,
1144                                 socket_id);
1145
1146                 if (retval < 0 || eventdev_data == NULL)
1147                         return NULL;
1148
1149                 eventdev->data = eventdev_data;
1150
1151                 snprintf(eventdev->data->name, RTE_EVENTDEV_NAME_MAX_LEN,
1152                                 "%s", name);
1153
1154                 eventdev->data->dev_id = dev_id;
1155                 eventdev->data->socket_id = socket_id;
1156                 eventdev->data->dev_started = 0;
1157
1158                 eventdev->attached = RTE_EVENTDEV_ATTACHED;
1159
1160                 eventdev_globals.nb_devs++;
1161         }
1162
1163         return eventdev;
1164 }
1165
1166 int
1167 rte_event_pmd_release(struct rte_eventdev *eventdev)
1168 {
1169         int ret;
1170         char mz_name[RTE_EVENTDEV_NAME_MAX_LEN];
1171         const struct rte_memzone *mz;
1172
1173         if (eventdev == NULL)
1174                 return -EINVAL;
1175
1176         eventdev->attached = RTE_EVENTDEV_DETACHED;
1177         eventdev_globals.nb_devs--;
1178
1179         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1180                 rte_free(eventdev->data->dev_private);
1181
1182                 /* Generate memzone name */
1183                 ret = snprintf(mz_name, sizeof(mz_name), "rte_eventdev_data_%u",
1184                                 eventdev->data->dev_id);
1185                 if (ret >= (int)sizeof(mz_name))
1186                         return -EINVAL;
1187
1188                 mz = rte_memzone_lookup(mz_name);
1189                 if (mz == NULL)
1190                         return -ENOMEM;
1191
1192                 ret = rte_memzone_free(mz);
1193                 if (ret)
1194                         return ret;
1195         }
1196
1197         eventdev->data = NULL;
1198         return 0;
1199 }