lib/librte_eal/freebsd/eal_interrupts.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2018 Intel Corporation
   3  */
   4
   5 #include <string.h>
   6 #include <sys/types.h>
   7 #include <sys/event.h>
   8 #include <sys/queue.h>
   9 #include <unistd.h>
  10
  11 #include <rte_errno.h>
  12 #include <rte_lcore.h>
  13 #include <rte_spinlock.h>
  14 #include <rte_common.h>
  15 #include <rte_interrupts.h>
  16 #include <rte_eal_trace.h>
  17
  18 #include "eal_private.h"
  19 #include "eal_alarm_private.h"
  20
  21 #define MAX_INTR_EVENTS 16
  22
  23 /**
  24  * union buffer for reading on different devices
  25  */
  26 union rte_intr_read_buffer {
  27         char charbuf[16];                /* for others */
  28 };
  29
  30 TAILQ_HEAD(rte_intr_cb_list, rte_intr_callback);
  31 TAILQ_HEAD(rte_intr_source_list, rte_intr_source);
  32
  33 struct rte_intr_callback {
  34         TAILQ_ENTRY(rte_intr_callback) next;
  35         rte_intr_callback_fn cb_fn;  /**< callback address */
  36         void *cb_arg;                /**< parameter for callback */
  37         uint8_t pending_delete;      /**< delete after callback is called */
  38         rte_intr_unregister_callback_fn ucb_fn; /**< fn to call before cb is deleted */
  39 };
  40
  41 struct rte_intr_source {
  42         TAILQ_ENTRY(rte_intr_source) next;
  43         struct rte_intr_handle intr_handle; /**< interrupt handle */
  44         struct rte_intr_cb_list callbacks;  /**< user callbacks */
  45         uint32_t active;
  46 };
  47
  48 /* global spinlock for interrupt data operation */
  49 static rte_spinlock_t intr_lock = RTE_SPINLOCK_INITIALIZER;
  50
  51 /* interrupt sources list */
  52 static struct rte_intr_source_list intr_sources;
  53
  54 /* interrupt handling thread */
  55 static pthread_t intr_thread;
  56
  57 static volatile int kq = -1;
  58
  59 static int
  60 intr_source_to_kevent(const struct rte_intr_handle *ih, struct kevent *ke)
  61 {
  62         /* alarm callbacks are special case */
  63         if (ih->type == RTE_INTR_HANDLE_ALARM) {
  64                 uint64_t timeout_ns;
  65
  66                 /* get soonest alarm timeout */
  67                 if (eal_alarm_get_timeout_ns(&timeout_ns) < 0)
  68                         return -1;
  69
  70                 ke->filter = EVFILT_TIMER;
  71                 /* timers are one shot */
  72                 ke->flags |= EV_ONESHOT;
  73                 ke->fflags = NOTE_NSECONDS;
  74                 ke->data = timeout_ns;
  75         } else {
  76                 ke->filter = EVFILT_READ;
  77         }
  78         ke->ident = ih->fd;
  79
  80         return 0;
  81 }
  82
  83 int
  84 rte_intr_callback_register(const struct rte_intr_handle *intr_handle,
  85                 rte_intr_callback_fn cb, void *cb_arg)
  86 {
  87         struct rte_intr_callback *callback;
  88         struct rte_intr_source *src;
  89         int ret = 0, add_event = 0;
  90
  91         /* first do parameter checking */
  92         if (intr_handle == NULL || intr_handle->fd < 0 || cb == NULL) {
  93                 RTE_LOG(ERR, EAL,
  94                         "Registering with invalid input parameter\n");
  95                 return -EINVAL;
  96         }
  97         if (kq < 0) {
  98                 RTE_LOG(ERR, EAL, "Kqueue is not active: %d\n", kq);
  99                 return -ENODEV;
 100         }
 101
 102         rte_spinlock_lock(&intr_lock);
 103
 104         /* find the source for this intr_handle */
 105         TAILQ_FOREACH(src, &intr_sources, next) {
 106                 if (src->intr_handle.fd == intr_handle->fd)
 107                         break;
 108         }
 109
 110         /* if this is an alarm interrupt and it already has a callback,
 111          * then we don't want to create a new callback because the only
 112          * thing on the list should be eal_alarm_callback() and we may
 113          * be called just to reset the timer.
 114          */
 115         if (src != NULL && src->intr_handle.type == RTE_INTR_HANDLE_ALARM &&
 116                  !TAILQ_EMPTY(&src->callbacks)) {
 117                 callback = NULL;
 118         } else {
 119                 /* allocate a new interrupt callback entity */
 120                 callback = calloc(1, sizeof(*callback));
 121                 if (callback == NULL) {
 122                         RTE_LOG(ERR, EAL, "Can not allocate memory\n");
 123                         ret = -ENOMEM;
 124                         goto fail;
 125                 }
 126                 callback->cb_fn = cb;
 127                 callback->cb_arg = cb_arg;
 128                 callback->pending_delete = 0;
 129                 callback->ucb_fn = NULL;
 130
 131                 if (src == NULL) {
 132                         src = calloc(1, sizeof(*src));
 133                         if (src == NULL) {
 134                                 RTE_LOG(ERR, EAL, "Can not allocate memory\n");
 135                                 ret = -ENOMEM;
 136                                 goto fail;
 137                         } else {
 138                                 src->intr_handle = *intr_handle;
 139                                 TAILQ_INIT(&src->callbacks);
 140                                 TAILQ_INSERT_TAIL(&intr_sources, src, next);
 141                         }
 142                 }
 143
 144                 /* we had no interrupts for this */
 145                 if (TAILQ_EMPTY(&src->callbacks))
 146                         add_event = 1;
 147
 148                 TAILQ_INSERT_TAIL(&(src->callbacks), callback, next);
 149         }
 150
 151         /* add events to the queue. timer events are special as we need to
 152          * re-set the timer.
 153          */
 154         if (add_event || src->intr_handle.type == RTE_INTR_HANDLE_ALARM) {
 155                 struct kevent ke;
 156
 157                 memset(&ke, 0, sizeof(ke));
 158                 ke.flags = EV_ADD; /* mark for addition to the queue */
 159
 160                 if (intr_source_to_kevent(intr_handle, &ke) < 0) {
 161                         RTE_LOG(ERR, EAL, "Cannot convert interrupt handle to kevent\n");
 162                         ret = -ENODEV;
 163                         goto fail;
 164                 }
 165
 166                 /**
 167                  * add the intr file descriptor into wait list.
 168                  */
 169                 if (kevent(kq, &ke, 1, NULL, 0, NULL) < 0) {
 170                         /* currently, nic_uio does not support interrupts, so
 171                          * this error will always be triggered and output to the
 172                          * user. so, don't output it unless debug log level set.
 173                          */
 174                         if (errno == ENODEV)
 175                                 RTE_LOG(DEBUG, EAL, "Interrupt handle %d not supported\n",
 176                                         src->intr_handle.fd);
 177                         else
 178                                 RTE_LOG(ERR, EAL, "Error adding fd %d "
 179                                                 "kevent, %s\n",
 180                                                 src->intr_handle.fd,
 181                                                 strerror(errno));
 182                         ret = -errno;
 183                         goto fail;
 184                 }
 185         }
 186         rte_eal_trace_intr_callback_register(intr_handle, cb, cb_arg, ret);
 187         rte_spinlock_unlock(&intr_lock);
 188
 189         return 0;
 190 fail:
 191         /* clean up */
 192         if (src != NULL) {
 193                 if (callback != NULL)
 194                         TAILQ_REMOVE(&(src->callbacks), callback, next);
 195                 if (TAILQ_EMPTY(&(src->callbacks))) {
 196                         TAILQ_REMOVE(&intr_sources, src, next);
 197                         free(src);
 198                 }
 199         }
 200         free(callback);
 201         rte_eal_trace_intr_callback_register(intr_handle, cb, cb_arg, ret);
 202         rte_spinlock_unlock(&intr_lock);
 203         return ret;
 204 }
 205
 206 int
 207 rte_intr_callback_unregister_pending(const struct rte_intr_handle *intr_handle,
 208                                 rte_intr_callback_fn cb_fn, void *cb_arg,
 209                                 rte_intr_unregister_callback_fn ucb_fn)
 210 {
 211         int ret;
 212         struct rte_intr_source *src;
 213         struct rte_intr_callback *cb, *next;
 214
 215         /* do parameter checking first */
 216         if (intr_handle == NULL || intr_handle->fd < 0) {
 217                 RTE_LOG(ERR, EAL,
 218                 "Unregistering with invalid input parameter\n");
 219                 return -EINVAL;
 220         }
 221
 222         if (kq < 0) {
 223                 RTE_LOG(ERR, EAL, "Kqueue is not active\n");
 224                 return -ENODEV;
 225         }
 226
 227         rte_spinlock_lock(&intr_lock);
 228
 229         /* check if the insterrupt source for the fd is existent */
 230         TAILQ_FOREACH(src, &intr_sources, next)
 231                 if (src->intr_handle.fd == intr_handle->fd)
 232                         break;
 233
 234         /* No interrupt source registered for the fd */
 235         if (src == NULL) {
 236                 ret = -ENOENT;
 237
 238         /* only usable if the source is active */
 239         } else if (src->active == 0) {
 240                 ret = -EAGAIN;
 241
 242         } else {
 243                 ret = 0;
 244
 245                 /* walk through the callbacks and mark all that match. */
 246                 for (cb = TAILQ_FIRST(&src->callbacks); cb != NULL; cb = next) {
 247                         next = TAILQ_NEXT(cb, next);
 248                         if (cb->cb_fn == cb_fn && (cb_arg == (void *)-1 ||
 249                                         cb->cb_arg == cb_arg)) {
 250                                 cb->pending_delete = 1;
 251                                 cb->ucb_fn = ucb_fn;
 252                                 ret++;
 253                         }
 254                 }
 255         }
 256
 257         rte_spinlock_unlock(&intr_lock);
 258
 259         return ret;
 260 }
 261
 262 int
 263 rte_intr_callback_unregister(const struct rte_intr_handle *intr_handle,
 264                 rte_intr_callback_fn cb_fn, void *cb_arg)
 265 {
 266         int ret;
 267         struct rte_intr_source *src;
 268         struct rte_intr_callback *cb, *next;
 269
 270         /* do parameter checking first */
 271         if (intr_handle == NULL || intr_handle->fd < 0) {
 272                 RTE_LOG(ERR, EAL,
 273                 "Unregistering with invalid input parameter\n");
 274                 return -EINVAL;
 275         }
 276         if (kq < 0) {
 277                 RTE_LOG(ERR, EAL, "Kqueue is not active\n");
 278                 return -ENODEV;
 279         }
 280
 281         rte_spinlock_lock(&intr_lock);
 282
 283         /* check if the insterrupt source for the fd is existent */
 284         TAILQ_FOREACH(src, &intr_sources, next)
 285                 if (src->intr_handle.fd == intr_handle->fd)
 286                         break;
 287
 288         /* No interrupt source registered for the fd */
 289         if (src == NULL) {
 290                 ret = -ENOENT;
 291
 292         /* interrupt source has some active callbacks right now. */
 293         } else if (src->active != 0) {
 294                 ret = -EAGAIN;
 295
 296         /* ok to remove. */
 297         } else {
 298                 struct kevent ke;
 299
 300                 ret = 0;
 301
 302                 /* remove it from the kqueue */
 303                 memset(&ke, 0, sizeof(ke));
 304                 ke.flags = EV_DELETE; /* mark for deletion from the queue */
 305
 306                 if (intr_source_to_kevent(intr_handle, &ke) < 0) {
 307                         RTE_LOG(ERR, EAL, "Cannot convert to kevent\n");
 308                         ret = -ENODEV;
 309                         goto out;
 310                 }
 311
 312                 /**
 313                  * remove intr file descriptor from wait list.
 314                  */
 315                 if (kevent(kq, &ke, 1, NULL, 0, NULL) < 0) {
 316                         RTE_LOG(ERR, EAL, "Error removing fd %d kevent, %s\n",
 317                                 src->intr_handle.fd, strerror(errno));
 318                         /* removing non-existent even is an expected condition
 319                          * in some circumstances (e.g. oneshot events).
 320                          */
 321                 }
 322
 323                 /*walk through the callbacks and remove all that match. */
 324                 for (cb = TAILQ_FIRST(&src->callbacks); cb != NULL; cb = next) {
 325                         next = TAILQ_NEXT(cb, next);
 326                         if (cb->cb_fn == cb_fn && (cb_arg == (void *)-1 ||
 327                                         cb->cb_arg == cb_arg)) {
 328                                 TAILQ_REMOVE(&src->callbacks, cb, next);
 329                                 free(cb);
 330                                 ret++;
 331                         }
 332                 }
 333
 334                 /* all callbacks for that source are removed. */
 335                 if (TAILQ_EMPTY(&src->callbacks)) {
 336                         TAILQ_REMOVE(&intr_sources, src, next);
 337                         free(src);
 338                 }
 339         }
 340 out:
 341         rte_eal_trace_intr_callback_unregister(intr_handle, cb_fn, cb_arg,
 342                 ret);
 343         rte_spinlock_unlock(&intr_lock);
 344
 345         return ret;
 346 }
 347
 348 int
 349 rte_intr_callback_unregister_sync(const struct rte_intr_handle *intr_handle,
 350                 rte_intr_callback_fn cb_fn, void *cb_arg)
 351 {
 352         int ret = 0;
 353
 354         while ((ret = rte_intr_callback_unregister(intr_handle, cb_fn, cb_arg)) == -EAGAIN)
 355                 rte_pause();
 356
 357         return ret;
 358 }
 359
 360 int
 361 rte_intr_enable(const struct rte_intr_handle *intr_handle)
 362 {
 363         int rc = 0;
 364
 365         if (intr_handle == NULL)
 366                 return -1;
 367
 368         if (intr_handle->type == RTE_INTR_HANDLE_VDEV) {
 369                 rc = 0;
 370                 goto out;
 371         }
 372
 373         if (intr_handle->fd < 0 || intr_handle->uio_cfg_fd < 0) {
 374                 rc = -1;
 375                 goto out;
 376         }
 377
 378         switch (intr_handle->type) {
 379         /* not used at this moment */
 380         case RTE_INTR_HANDLE_ALARM:
 381                 rc = -1;
 382                 break;
 383         /* not used at this moment */
 384         case RTE_INTR_HANDLE_DEV_EVENT:
 385                 rc = -1;
 386                 break;
 387         /* unknown handle type */
 388         default:
 389                 RTE_LOG(ERR, EAL,
 390                         "Unknown handle type of fd %d\n",
 391                                         intr_handle->fd);
 392                 rc = -1;
 393                 break;
 394         }
 395
 396 out:
 397         rte_eal_trace_intr_enable(intr_handle, rc);
 398         return rc;
 399 }
 400
 401 int
 402 rte_intr_disable(const struct rte_intr_handle *intr_handle)
 403 {
 404         int rc = 0;
 405
 406         if (intr_handle == NULL)
 407                 return -1;
 408
 409         if (intr_handle->type == RTE_INTR_HANDLE_VDEV) {
 410                 rc = 0;
 411                 goto out;
 412         }
 413
 414         if (intr_handle->fd < 0 || intr_handle->uio_cfg_fd < 0) {
 415                 rc = -1;
 416                 goto out;
 417         }
 418
 419         switch (intr_handle->type) {
 420         /* not used at this moment */
 421         case RTE_INTR_HANDLE_ALARM:
 422                 rc = -1;
 423                 break;
 424         /* not used at this moment */
 425         case RTE_INTR_HANDLE_DEV_EVENT:
 426                 rc = -1;
 427                 break;
 428         /* unknown handle type */
 429         default:
 430                 RTE_LOG(ERR, EAL,
 431                         "Unknown handle type of fd %d\n",
 432                                         intr_handle->fd);
 433                 rc = -1;
 434                 break;
 435         }
 436 out:
 437         rte_eal_trace_intr_disable(intr_handle, rc);
 438         return rc;
 439 }
 440
 441 int
 442 rte_intr_ack(const struct rte_intr_handle *intr_handle)
 443 {
 444         if (intr_handle && intr_handle->type == RTE_INTR_HANDLE_VDEV)
 445                 return 0;
 446
 447         return -1;
 448 }
 449
 450 static void
 451 eal_intr_process_interrupts(struct kevent *events, int nfds)
 452 {
 453         struct rte_intr_callback active_cb;
 454         union rte_intr_read_buffer buf;
 455         struct rte_intr_callback *cb, *next;
 456         struct rte_intr_source *src;
 457         bool call = false;
 458         int n, bytes_read;
 459         struct kevent ke;
 460
 461         for (n = 0; n < nfds; n++) {
 462                 int event_fd = events[n].ident;
 463
 464                 rte_spinlock_lock(&intr_lock);
 465                 TAILQ_FOREACH(src, &intr_sources, next)
 466                         if (src->intr_handle.fd == event_fd)
 467                                 break;
 468                 if (src == NULL) {
 469                         rte_spinlock_unlock(&intr_lock);
 470                         continue;
 471                 }
 472
 473                 /* mark this interrupt source as active and release the lock. */
 474                 src->active = 1;
 475                 rte_spinlock_unlock(&intr_lock);
 476
 477                 /* set the length to be read dor different handle type */
 478                 switch (src->intr_handle.type) {
 479                 case RTE_INTR_HANDLE_ALARM:
 480                         bytes_read = 0;
 481                         call = true;
 482                         break;
 483                 case RTE_INTR_HANDLE_VDEV:
 484                 case RTE_INTR_HANDLE_EXT:
 485                         bytes_read = 0;
 486                         call = true;
 487                         break;
 488                 case RTE_INTR_HANDLE_DEV_EVENT:
 489                         bytes_read = 0;
 490                         call = true;
 491                         break;
 492                 default:
 493                         bytes_read = 1;
 494                         break;
 495                 }
 496
 497                 if (bytes_read > 0) {
 498                         /**
 499                          * read out to clear the ready-to-be-read flag
 500                          * for epoll_wait.
 501                          */
 502                         bytes_read = read(event_fd, &buf, bytes_read);
 503                         if (bytes_read < 0) {
 504                                 if (errno == EINTR || errno == EWOULDBLOCK)
 505                                         continue;
 506
 507                                 RTE_LOG(ERR, EAL, "Error reading from file "
 508                                         "descriptor %d: %s\n",
 509                                         event_fd,
 510                                         strerror(errno));
 511                         } else if (bytes_read == 0)
 512                                 RTE_LOG(ERR, EAL, "Read nothing from file "
 513                                         "descriptor %d\n", event_fd);
 514                         else
 515                                 call = true;
 516                 }
 517
 518                 /* grab a lock, again to call callbacks and update status. */
 519                 rte_spinlock_lock(&intr_lock);
 520
 521                 if (call) {
 522                         /* Finally, call all callbacks. */
 523                         TAILQ_FOREACH(cb, &src->callbacks, next) {
 524
 525                                 /* make a copy and unlock. */
 526                                 active_cb = *cb;
 527                                 rte_spinlock_unlock(&intr_lock);
 528
 529                                 /* call the actual callback */
 530                                 active_cb.cb_fn(active_cb.cb_arg);
 531
 532                                 /*get the lock back. */
 533                                 rte_spinlock_lock(&intr_lock);
 534                         }
 535                 }
 536
 537                 /* we done with that interrupt source, release it. */
 538                 src->active = 0;
 539
 540                 /* check if any callback are supposed to be removed */
 541                 for (cb = TAILQ_FIRST(&src->callbacks); cb != NULL; cb = next) {
 542                         next = TAILQ_NEXT(cb, next);
 543                         if (cb->pending_delete) {
 544                                 /* remove it from the kqueue */
 545                                 memset(&ke, 0, sizeof(ke));
 546                                 /* mark for deletion from the queue */
 547                                 ke.flags = EV_DELETE;
 548
 549                                 if (intr_source_to_kevent(&src->intr_handle, &ke) < 0) {
 550                                         RTE_LOG(ERR, EAL, "Cannot convert to kevent\n");
 551                                         rte_spinlock_unlock(&intr_lock);
 552                                         return;
 553                                 }
 554
 555                                 /**
 556                                  * remove intr file descriptor from wait list.
 557                                  */
 558                                 if (kevent(kq, &ke, 1, NULL, 0, NULL) < 0) {
 559                                         RTE_LOG(ERR, EAL, "Error removing fd %d kevent, "
 560                                                 "%s\n", src->intr_handle.fd,
 561                                                 strerror(errno));
 562                                         /* removing non-existent even is an expected
 563                                          * condition in some circumstances
 564                                          * (e.g. oneshot events).
 565                                          */
 566                                 }
 567
 568                                 TAILQ_REMOVE(&src->callbacks, cb, next);
 569                                 if (cb->ucb_fn)
 570                                         cb->ucb_fn(&src->intr_handle, cb->cb_arg);
 571                                 free(cb);
 572                         }
 573                 }
 574
 575                 /* all callbacks for that source are removed. */
 576                 if (TAILQ_EMPTY(&src->callbacks)) {
 577                         TAILQ_REMOVE(&intr_sources, src, next);
 578                         free(src);
 579                 }
 580
 581                 rte_spinlock_unlock(&intr_lock);
 582         }
 583 }
 584
 585 static void *
 586 eal_intr_thread_main(void *arg __rte_unused)
 587 {
 588         struct kevent events[MAX_INTR_EVENTS];
 589         int nfds;
 590
 591         /* host thread, never break out */
 592         for (;;) {
 593                 /* do not change anything, just wait */
 594                 nfds = kevent(kq, NULL, 0, events, MAX_INTR_EVENTS, NULL);
 595
 596                 /* kevent fail */
 597                 if (nfds < 0) {
 598                         if (errno == EINTR)
 599                                 continue;
 600                         RTE_LOG(ERR, EAL,
 601                                 "kevent returns with fail\n");
 602                         break;
 603                 }
 604                 /* kevent timeout, will never happen here */
 605                 else if (nfds == 0)
 606                         continue;
 607
 608                 /* kevent has at least one fd ready to read */
 609                 eal_intr_process_interrupts(events, nfds);
 610         }
 611         close(kq);
 612         kq = -1;
 613         return NULL;
 614 }
 615
 616 int
 617 rte_eal_intr_init(void)
 618 {
 619         int ret = 0;
 620
 621         /* init the global interrupt source head */
 622         TAILQ_INIT(&intr_sources);
 623
 624         kq = kqueue();
 625         if (kq < 0) {
 626                 RTE_LOG(ERR, EAL, "Cannot create kqueue instance\n");
 627                 return -1;
 628         }
 629
 630         /* create the host thread to wait/handle the interrupt */
 631         ret = rte_ctrl_thread_create(&intr_thread, "eal-intr-thread", NULL,
 632                         eal_intr_thread_main, NULL);
 633         if (ret != 0) {
 634                 rte_errno = -ret;
 635                 RTE_LOG(ERR, EAL,
 636                         "Failed to create thread for interrupt handling\n");
 637         }
 638
 639         return ret;
 640 }
 641
 642 int
 643 rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
 644                 int epfd, int op, unsigned int vec, void *data)
 645 {
 646         RTE_SET_USED(intr_handle);
 647         RTE_SET_USED(epfd);
 648         RTE_SET_USED(op);
 649         RTE_SET_USED(vec);
 650         RTE_SET_USED(data);
 651
 652         return -ENOTSUP;
 653 }
 654
 655 int
 656 rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd)
 657 {
 658         RTE_SET_USED(intr_handle);
 659         RTE_SET_USED(nb_efd);
 660
 661         return 0;
 662 }
 663
 664 void
 665 rte_intr_efd_disable(struct rte_intr_handle *intr_handle)
 666 {
 667         RTE_SET_USED(intr_handle);
 668 }
 669
 670 int
 671 rte_intr_dp_is_en(struct rte_intr_handle *intr_handle)
 672 {
 673         RTE_SET_USED(intr_handle);
 674         return 0;
 675 }
 676
 677 int
 678 rte_intr_allow_others(struct rte_intr_handle *intr_handle)
 679 {
 680         RTE_SET_USED(intr_handle);
 681         return 1;
 682 }
 683
 684 int
 685 rte_intr_cap_multiple(struct rte_intr_handle *intr_handle)
 686 {
 687         RTE_SET_USED(intr_handle);
 688         return 0;
 689 }
 690
 691 int
 692 rte_epoll_wait(int epfd, struct rte_epoll_event *events,
 693                 int maxevents, int timeout)
 694 {
 695         RTE_SET_USED(epfd);
 696         RTE_SET_USED(events);
 697         RTE_SET_USED(maxevents);
 698         RTE_SET_USED(timeout);
 699
 700         return -ENOTSUP;
 701 }
 702
 703 int
 704 rte_epoll_wait_interruptible(int epfd, struct rte_epoll_event *events,
 705                              int maxevents, int timeout)
 706 {
 707         RTE_SET_USED(epfd);
 708         RTE_SET_USED(events);
 709         RTE_SET_USED(maxevents);
 710         RTE_SET_USED(timeout);
 711
 712         return -ENOTSUP;
 713 }
 714
 715 int
 716 rte_epoll_ctl(int epfd, int op, int fd, struct rte_epoll_event *event)
 717 {
 718         RTE_SET_USED(epfd);
 719         RTE_SET_USED(op);
 720         RTE_SET_USED(fd);
 721         RTE_SET_USED(event);
 722
 723         return -ENOTSUP;
 724 }
 725
 726 int
 727 rte_intr_tls_epfd(void)
 728 {
 729         return -ENOTSUP;
 730 }
 731
 732 void
 733 rte_intr_free_epoll_fd(struct rte_intr_handle *intr_handle)
 734 {
 735         RTE_SET_USED(intr_handle);
 736 }
 737
 738 int rte_thread_is_intr(void)
 739 {
 740         return pthread_equal(intr_thread, pthread_self());
 741 }