drivers/bus/dpaa/dpaa_bus.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2017-2019 NXP
   4  *
   5  */
   6 /* System headers */
   7 #include <stdio.h>
   8 #include <inttypes.h>
   9 #include <unistd.h>
  10 #include <limits.h>
  11 #include <sched.h>
  12 #include <signal.h>
  13 #include <pthread.h>
  14 #include <sys/types.h>
  15 #include <sys/syscall.h>
  16
  17 #include <rte_byteorder.h>
  18 #include <rte_common.h>
  19 #include <rte_interrupts.h>
  20 #include <rte_log.h>
  21 #include <rte_debug.h>
  22 #include <rte_atomic.h>
  23 #include <rte_branch_prediction.h>
  24 #include <rte_memory.h>
  25 #include <rte_tailq.h>
  26 #include <rte_eal.h>
  27 #include <rte_alarm.h>
  28 #include <rte_ether.h>
  29 #include <rte_ethdev_driver.h>
  30 #include <rte_malloc.h>
  31 #include <rte_ring.h>
  32 #include <rte_bus.h>
  33 #include <rte_mbuf_pool_ops.h>
  34
  35 #include <dpaa_of.h>
  36 #include <rte_dpaa_bus.h>
  37 #include <rte_dpaa_logs.h>
  38 #include <dpaax_iova_table.h>
  39
  40 #include <fsl_usd.h>
  41 #include <fsl_qman.h>
  42 #include <fsl_bman.h>
  43 #include <netcfg.h>
  44
  45 static struct rte_dpaa_bus rte_dpaa_bus;
  46 struct netcfg_info *dpaa_netcfg;
  47
  48 /* define a variable to hold the portal_key, once created.*/
  49 static pthread_key_t dpaa_portal_key;
  50
  51 unsigned int dpaa_svr_family;
  52
  53 #define FSL_DPAA_BUS_NAME       dpaa_bus
  54
  55 RTE_DEFINE_PER_LCORE(struct dpaa_portal *, dpaa_io);
  56
  57 struct fm_eth_port_cfg *
  58 dpaa_get_eth_port_cfg(int dev_id)
  59 {
  60         return &dpaa_netcfg->port_cfg[dev_id];
  61 }
  62
  63 static int
  64 compare_dpaa_devices(struct rte_dpaa_device *dev1,
  65                      struct rte_dpaa_device *dev2)
  66 {
  67         int comp = 0;
  68
  69         /* Segragating ETH from SEC devices */
  70         if (dev1->device_type > dev2->device_type)
  71                 comp = 1;
  72         else if (dev1->device_type < dev2->device_type)
  73                 comp = -1;
  74         else
  75                 comp = 0;
  76
  77         if ((comp != 0) || (dev1->device_type != FSL_DPAA_ETH))
  78                 return comp;
  79
  80         if (dev1->id.fman_id > dev2->id.fman_id) {
  81                 comp = 1;
  82         } else if (dev1->id.fman_id < dev2->id.fman_id) {
  83                 comp = -1;
  84         } else {
  85                 /* FMAN ids match, check for mac_id */
  86                 if (dev1->id.mac_id > dev2->id.mac_id)
  87                         comp = 1;
  88                 else if (dev1->id.mac_id < dev2->id.mac_id)
  89                         comp = -1;
  90                 else
  91                         comp = 0;
  92         }
  93
  94         return comp;
  95 }
  96
  97 static inline void
  98 dpaa_add_to_device_list(struct rte_dpaa_device *newdev)
  99 {
 100         int comp, inserted = 0;
 101         struct rte_dpaa_device *dev = NULL;
 102         struct rte_dpaa_device *tdev = NULL;
 103
 104         TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 105                 comp = compare_dpaa_devices(newdev, dev);
 106                 if (comp < 0) {
 107                         TAILQ_INSERT_BEFORE(dev, newdev, next);
 108                         inserted = 1;
 109                         break;
 110                 }
 111         }
 112
 113         if (!inserted)
 114                 TAILQ_INSERT_TAIL(&rte_dpaa_bus.device_list, newdev, next);
 115 }
 116
 117 /*
 118  * Reads the SEC device from DTS
 119  * Returns -1 if SEC devices not available, 0 otherwise
 120  */
 121 static inline int
 122 dpaa_sec_available(void)
 123 {
 124         const struct device_node *caam_node;
 125
 126         for_each_compatible_node(caam_node, NULL, "fsl,sec-v4.0") {
 127                 return 0;
 128         }
 129
 130         return -1;
 131 }
 132
 133 static void dpaa_clean_device_list(void);
 134
 135 static struct rte_devargs *
 136 dpaa_devargs_lookup(struct rte_dpaa_device *dev)
 137 {
 138         struct rte_devargs *devargs;
 139         char dev_name[32];
 140
 141         RTE_EAL_DEVARGS_FOREACH("dpaa_bus", devargs) {
 142                 devargs->bus->parse(devargs->name, &dev_name);
 143                 if (strcmp(dev_name, dev->device.name) == 0) {
 144                         DPAA_BUS_INFO("**Devargs matched %s", dev_name);
 145                         return devargs;
 146                 }
 147         }
 148         return NULL;
 149 }
 150
 151 static int
 152 dpaa_create_device_list(void)
 153 {
 154         int i;
 155         int ret;
 156         struct rte_dpaa_device *dev;
 157         struct fm_eth_port_cfg *cfg;
 158         struct fman_if *fman_intf;
 159
 160         /* Creating Ethernet Devices */
 161         for (i = 0; i < dpaa_netcfg->num_ethports; i++) {
 162                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 163                 if (!dev) {
 164                         DPAA_BUS_LOG(ERR, "Failed to allocate ETH devices");
 165                         ret = -ENOMEM;
 166                         goto cleanup;
 167                 }
 168
 169                 dev->device.bus = &rte_dpaa_bus.bus;
 170
 171                 cfg = &dpaa_netcfg->port_cfg[i];
 172                 fman_intf = cfg->fman_if;
 173
 174                 /* Device identifiers */
 175                 dev->id.fman_id = fman_intf->fman_idx + 1;
 176                 dev->id.mac_id = fman_intf->mac_idx;
 177                 dev->device_type = FSL_DPAA_ETH;
 178                 dev->id.dev_id = i;
 179
 180                 /* Create device name */
 181                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 182                 sprintf(dev->name, "fm%d-mac%d", (fman_intf->fman_idx + 1),
 183                         fman_intf->mac_idx);
 184                 DPAA_BUS_LOG(INFO, "%s netdev added", dev->name);
 185                 dev->device.name = dev->name;
 186                 dev->device.devargs = dpaa_devargs_lookup(dev);
 187
 188                 dpaa_add_to_device_list(dev);
 189         }
 190
 191         rte_dpaa_bus.device_count = i;
 192
 193         /* Unlike case of ETH, RTE_LIBRTE_DPAA_MAX_CRYPTODEV SEC devices are
 194          * constantly created only if "sec" property is found in the device
 195          * tree. Logically there is no limit for number of devices (QI
 196          * interfaces) that can be created.
 197          */
 198
 199         if (dpaa_sec_available()) {
 200                 DPAA_BUS_LOG(INFO, "DPAA SEC devices are not available");
 201                 return 0;
 202         }
 203
 204         /* Creating SEC Devices */
 205         for (i = 0; i < RTE_LIBRTE_DPAA_MAX_CRYPTODEV; i++) {
 206                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 207                 if (!dev) {
 208                         DPAA_BUS_LOG(ERR, "Failed to allocate SEC devices");
 209                         ret = -1;
 210                         goto cleanup;
 211                 }
 212
 213                 dev->device_type = FSL_DPAA_CRYPTO;
 214                 dev->id.dev_id = rte_dpaa_bus.device_count + i;
 215
 216                 /* Even though RTE_CRYPTODEV_NAME_MAX_LEN is valid length of
 217                  * crypto PMD, using RTE_ETH_NAME_MAX_LEN as that is the size
 218                  * allocated for dev->name/
 219                  */
 220                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 221                 sprintf(dev->name, "dpaa_sec-%d", i+1);
 222                 DPAA_BUS_LOG(INFO, "%s cryptodev added", dev->name);
 223                 dev->device.name = dev->name;
 224                 dev->device.devargs = dpaa_devargs_lookup(dev);
 225
 226                 dpaa_add_to_device_list(dev);
 227         }
 228
 229         rte_dpaa_bus.device_count += i;
 230
 231         return 0;
 232
 233 cleanup:
 234         dpaa_clean_device_list();
 235         return ret;
 236 }
 237
 238 static void
 239 dpaa_clean_device_list(void)
 240 {
 241         struct rte_dpaa_device *dev = NULL;
 242         struct rte_dpaa_device *tdev = NULL;
 243
 244         TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 245                 TAILQ_REMOVE(&rte_dpaa_bus.device_list, dev, next);
 246                 free(dev);
 247                 dev = NULL;
 248         }
 249 }
 250
 251 int rte_dpaa_portal_init(void *arg)
 252 {
 253         unsigned int cpu, lcore = rte_lcore_id();
 254         int ret;
 255
 256         BUS_INIT_FUNC_TRACE();
 257
 258         if ((size_t)arg == 1 || lcore == LCORE_ID_ANY)
 259                 lcore = rte_get_master_lcore();
 260         else
 261                 if (lcore >= RTE_MAX_LCORE)
 262                         return -1;
 263
 264         cpu = rte_lcore_to_cpu_id(lcore);
 265
 266         /* Initialise bman thread portals */
 267         ret = bman_thread_init();
 268         if (ret) {
 269                 DPAA_BUS_LOG(ERR, "bman_thread_init failed on core %u"
 270                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 271                 return ret;
 272         }
 273
 274         DPAA_BUS_LOG(DEBUG, "BMAN thread initialized - CPU=%d lcore=%d",
 275                      cpu, lcore);
 276
 277         /* Initialise qman thread portals */
 278         ret = qman_thread_init();
 279         if (ret) {
 280                 DPAA_BUS_LOG(ERR, "qman_thread_init failed on core %u"
 281                             " (lcore=%u) with ret: %d", cpu, lcore, ret);
 282                 bman_thread_finish();
 283                 return ret;
 284         }
 285
 286         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized - CPU=%d lcore=%d",
 287                      cpu, lcore);
 288
 289         DPAA_PER_LCORE_PORTAL = rte_malloc(NULL, sizeof(struct dpaa_portal),
 290                                     RTE_CACHE_LINE_SIZE);
 291         if (!DPAA_PER_LCORE_PORTAL) {
 292                 DPAA_BUS_LOG(ERR, "Unable to allocate memory");
 293                 bman_thread_finish();
 294                 qman_thread_finish();
 295                 return -ENOMEM;
 296         }
 297
 298         DPAA_PER_LCORE_PORTAL->qman_idx = qman_get_portal_index();
 299         DPAA_PER_LCORE_PORTAL->bman_idx = bman_get_portal_index();
 300         DPAA_PER_LCORE_PORTAL->tid = syscall(SYS_gettid);
 301
 302         ret = pthread_setspecific(dpaa_portal_key,
 303                                   (void *)DPAA_PER_LCORE_PORTAL);
 304         if (ret) {
 305                 DPAA_BUS_LOG(ERR, "pthread_setspecific failed on core %u"
 306                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 307                 dpaa_portal_finish(NULL);
 308
 309                 return ret;
 310         }
 311
 312         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized");
 313
 314         return 0;
 315 }
 316
 317 int
 318 rte_dpaa_portal_fq_init(void *arg, struct qman_fq *fq)
 319 {
 320         /* Affine above created portal with channel*/
 321         u32 sdqcr;
 322         int ret;
 323
 324         if (unlikely(!DPAA_PER_LCORE_PORTAL)) {
 325                 ret = rte_dpaa_portal_init(arg);
 326                 if (ret < 0) {
 327                         DPAA_BUS_LOG(ERR, "portal initialization failure");
 328                         return ret;
 329                 }
 330         }
 331
 332         /* Initialise qman specific portals */
 333         ret = fsl_qman_fq_portal_init(fq->qp);
 334         if (ret) {
 335                 DPAA_BUS_LOG(ERR, "Unable to init fq portal");
 336                 return -1;
 337         }
 338
 339         sdqcr = QM_SDQCR_CHANNELS_POOL_CONV(fq->ch_id);
 340         qman_static_dequeue_add(sdqcr, fq->qp);
 341
 342         return 0;
 343 }
 344
 345 int rte_dpaa_portal_fq_close(struct qman_fq *fq)
 346 {
 347         return fsl_qman_fq_portal_destroy(fq->qp);
 348 }
 349
 350 void
 351 dpaa_portal_finish(void *arg)
 352 {
 353         struct dpaa_portal *dpaa_io_portal = (struct dpaa_portal *)arg;
 354
 355         if (!dpaa_io_portal) {
 356                 DPAA_BUS_LOG(DEBUG, "Portal already cleaned");
 357                 return;
 358         }
 359
 360         bman_thread_finish();
 361         qman_thread_finish();
 362
 363         pthread_setspecific(dpaa_portal_key, NULL);
 364
 365         rte_free(dpaa_io_portal);
 366         dpaa_io_portal = NULL;
 367         DPAA_PER_LCORE_PORTAL = NULL;
 368 }
 369
 370 static int
 371 rte_dpaa_bus_parse(const char *name, void *out_name)
 372 {
 373         int i, j;
 374         int max_fman = 2, max_macs = 16;
 375         char *dup_name;
 376         char *sep = NULL;
 377
 378         /* There are two ways of passing device name, with and without
 379          * separator. "dpaa_bus:fm1-mac3" with separator, and "fm1-mac3"
 380          * without separator. Both need to be handled.
 381          * It is also possible that "name=fm1-mac3" is passed along.
 382          */
 383         DPAA_BUS_DEBUG("Parse device name (%s)", name);
 384
 385         /* Check for dpaa_bus:fm1-mac3 style */
 386         dup_name = strdup(name);
 387         sep = strchr(dup_name, ':');
 388         if (!sep)
 389                 /* If not, check for name=fm1-mac3 style */
 390                 sep = strchr(dup_name, '=');
 391
 392         if (sep)
 393                 /* jump over the seprator */
 394                 sep = (char *) (sep + 1);
 395         else
 396                 sep = dup_name;
 397
 398         for (i = 0; i < max_fman; i++) {
 399                 for (j = 0; j < max_macs; j++) {
 400                         char fm_name[16];
 401                         snprintf(fm_name, 16, "fm%d-mac%d", i, j);
 402                         if (strcmp(fm_name, sep) == 0) {
 403                                 if (out_name)
 404                                         strcpy(out_name, sep);
 405                                 free(dup_name);
 406                                 return 0;
 407                         }
 408                 }
 409         }
 410
 411         for (i = 0; i < RTE_LIBRTE_DPAA_MAX_CRYPTODEV; i++) {
 412                 char sec_name[16];
 413
 414                 snprintf(sec_name, 16, "dpaa_sec-%d", i+1);
 415                 if (strcmp(sec_name, sep) == 0) {
 416                         if (out_name)
 417                                 strcpy(out_name, sep);
 418                         free(dup_name);
 419                         return 0;
 420                 }
 421         }
 422
 423         free(dup_name);
 424         return -EINVAL;
 425 }
 426
 427 #define DPAA_DEV_PATH1 "/sys/devices/platform/soc/soc:fsl,dpaa"
 428 #define DPAA_DEV_PATH2 "/sys/devices/platform/fsl,dpaa"
 429
 430 static int
 431 rte_dpaa_bus_scan(void)
 432 {
 433         int ret;
 434
 435         BUS_INIT_FUNC_TRACE();
 436
 437         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 438             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 439                 RTE_LOG(DEBUG, EAL, "DPAA Bus not present. Skipping.\n");
 440                 return 0;
 441         }
 442
 443         if (rte_dpaa_bus.detected)
 444                 return 0;
 445
 446         rte_dpaa_bus.detected = 1;
 447
 448         /* create the key, supplying a function that'll be invoked
 449          * when a portal affined thread will be deleted.
 450          */
 451         ret = pthread_key_create(&dpaa_portal_key, dpaa_portal_finish);
 452         if (ret) {
 453                 DPAA_BUS_LOG(DEBUG, "Unable to create pthread key. (%d)", ret);
 454                 dpaa_clean_device_list();
 455                 return ret;
 456         }
 457
 458         return 0;
 459 }
 460
 461 /* register a dpaa bus based dpaa driver */
 462 void
 463 rte_dpaa_driver_register(struct rte_dpaa_driver *driver)
 464 {
 465         RTE_VERIFY(driver);
 466
 467         BUS_INIT_FUNC_TRACE();
 468
 469         TAILQ_INSERT_TAIL(&rte_dpaa_bus.driver_list, driver, next);
 470         /* Update Bus references */
 471         driver->dpaa_bus = &rte_dpaa_bus;
 472 }
 473
 474 /* un-register a dpaa bus based dpaa driver */
 475 void
 476 rte_dpaa_driver_unregister(struct rte_dpaa_driver *driver)
 477 {
 478         struct rte_dpaa_bus *dpaa_bus;
 479
 480         BUS_INIT_FUNC_TRACE();
 481
 482         dpaa_bus = driver->dpaa_bus;
 483
 484         TAILQ_REMOVE(&dpaa_bus->driver_list, driver, next);
 485         /* Update Bus references */
 486         driver->dpaa_bus = NULL;
 487 }
 488
 489 static int
 490 rte_dpaa_device_match(struct rte_dpaa_driver *drv,
 491                       struct rte_dpaa_device *dev)
 492 {
 493         if (!drv || !dev) {
 494                 DPAA_BUS_DEBUG("Invalid drv or dev received.");
 495                 return -1;
 496         }
 497
 498         if (drv->drv_type == dev->device_type)
 499                 return 0;
 500
 501         return -1;
 502 }
 503
 504 static int
 505 rte_dpaa_bus_dev_build(void)
 506 {
 507         int ret;
 508
 509         /* Load the device-tree driver */
 510         ret = of_init();
 511         if (ret) {
 512                 DPAA_BUS_LOG(ERR, "of_init failed with ret: %d", ret);
 513                 return -1;
 514         }
 515
 516         /* Get the interface configurations from device-tree */
 517         dpaa_netcfg = netcfg_acquire();
 518         if (!dpaa_netcfg) {
 519                 DPAA_BUS_LOG(ERR, "netcfg_acquire failed");
 520                 return -EINVAL;
 521         }
 522
 523         RTE_LOG(NOTICE, EAL, "DPAA Bus Detected\n");
 524
 525         if (!dpaa_netcfg->num_ethports) {
 526                 DPAA_BUS_LOG(INFO, "no network interfaces available");
 527                 /* This is not an error */
 528                 return 0;
 529         }
 530
 531 #ifdef RTE_LIBRTE_DPAA_DEBUG_DRIVER
 532         dump_netcfg(dpaa_netcfg);
 533 #endif
 534
 535         DPAA_BUS_LOG(DEBUG, "Number of ethernet devices = %d",
 536                      dpaa_netcfg->num_ethports);
 537         ret = dpaa_create_device_list();
 538         if (ret) {
 539                 DPAA_BUS_LOG(ERR, "Unable to create device list. (%d)", ret);
 540                 return ret;
 541         }
 542         return 0;
 543 }
 544
 545 static int
 546 rte_dpaa_bus_probe(void)
 547 {
 548         int ret = -1;
 549         struct rte_dpaa_device *dev;
 550         struct rte_dpaa_driver *drv;
 551         FILE *svr_file = NULL;
 552         unsigned int svr_ver;
 553         int probe_all = rte_dpaa_bus.bus.conf.scan_mode != RTE_BUS_SCAN_WHITELIST;
 554         static int process_once;
 555
 556         /* If DPAA bus is not present nothing needs to be done */
 557         if (!rte_dpaa_bus.detected)
 558                 return 0;
 559
 560         /* Device list creation is only done once */
 561         if (!process_once) {
 562                 rte_dpaa_bus_dev_build();
 563                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 564                         /* One time load of Qman/Bman drivers */
 565                         ret = qman_global_init();
 566                         if (ret) {
 567                                 DPAA_BUS_ERR("QMAN initialization failed: %d",
 568                                              ret);
 569                                 return ret;
 570                         }
 571                         ret = bman_global_init();
 572                         if (ret) {
 573                                 DPAA_BUS_ERR("BMAN initialization failed: %d",
 574                                              ret);
 575                                 return ret;
 576                         }
 577                 }
 578         }
 579         process_once = 1;
 580
 581         /* If no device present on DPAA bus nothing needs to be done */
 582         if (TAILQ_EMPTY(&rte_dpaa_bus.device_list))
 583                 return 0;
 584
 585         svr_file = fopen(DPAA_SOC_ID_FILE, "r");
 586         if (svr_file) {
 587                 if (fscanf(svr_file, "svr:%x", &svr_ver) > 0)
 588                         dpaa_svr_family = svr_ver & SVR_MASK;
 589                 fclose(svr_file);
 590         }
 591
 592         /* And initialize the PA->VA translation table */
 593         dpaax_iova_table_populate();
 594
 595         /* For each registered driver, and device, call the driver->probe */
 596         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 597                 TAILQ_FOREACH(drv, &rte_dpaa_bus.driver_list, next) {
 598                         ret = rte_dpaa_device_match(drv, dev);
 599                         if (ret)
 600                                 continue;
 601
 602                         if (rte_dev_is_probed(&dev->device))
 603                                 continue;
 604
 605                         if (!drv->probe ||
 606                             (dev->device.devargs &&
 607                             dev->device.devargs->policy == RTE_DEV_BLACKLISTED))
 608                                 continue;
 609
 610                         if (probe_all ||
 611                             (dev->device.devargs &&
 612                             dev->device.devargs->policy ==
 613                             RTE_DEV_WHITELISTED)) {
 614                                 ret = drv->probe(drv, dev);
 615                                 if (ret) {
 616                                         DPAA_BUS_ERR("unable to probe:%s",
 617                                                      dev->name);
 618                                 } else {
 619                                         dev->driver = drv;
 620                                         dev->device.driver = &drv->driver;
 621                                 }
 622                         }
 623                         break;
 624                 }
 625         }
 626
 627         /* Register DPAA mempool ops only if any DPAA device has
 628          * been detected.
 629          */
 630         rte_mbuf_set_platform_mempool_ops(DPAA_MEMPOOL_OPS_NAME);
 631
 632         return 0;
 633 }
 634
 635 static struct rte_device *
 636 rte_dpaa_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 637                      const void *data)
 638 {
 639         struct rte_dpaa_device *dev;
 640         const struct rte_dpaa_device *dstart;
 641
 642         /* find_device is called with 'data' as an opaque object - just call
 643          * cmp with this and each device object on bus.
 644          */
 645
 646         if (start != NULL) {
 647                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 648                 dev = TAILQ_NEXT(dstart, next);
 649         } else {
 650                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 651         }
 652
 653         while (dev != NULL) {
 654                 if (cmp(&dev->device, data) == 0) {
 655                         DPAA_BUS_DEBUG("Found dev=(%s)\n", dev->device.name);
 656                         return &dev->device;
 657                 }
 658                 dev = TAILQ_NEXT(dev, next);
 659         }
 660
 661         DPAA_BUS_DEBUG("Unable to find any device\n");
 662         return NULL;
 663 }
 664
 665 /*
 666  * Get iommu class of DPAA2 devices on the bus.
 667  */
 668 static enum rte_iova_mode
 669 rte_dpaa_get_iommu_class(void)
 670 {
 671         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 672             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 673                 return RTE_IOVA_DC;
 674         }
 675         return RTE_IOVA_PA;
 676 }
 677
 678 static int
 679 dpaa_bus_plug(struct rte_device *dev __rte_unused)
 680 {
 681         /* No operation is performed while plugging the device */
 682         return 0;
 683 }
 684
 685 static int
 686 dpaa_bus_unplug(struct rte_device *dev __rte_unused)
 687 {
 688         /* No operation is performed while unplugging the device */
 689         return 0;
 690 }
 691
 692 static void *
 693 dpaa_bus_dev_iterate(const void *start, const char *str,
 694                      const struct rte_dev_iterator *it __rte_unused)
 695 {
 696         const struct rte_dpaa_device *dstart;
 697         struct rte_dpaa_device *dev;
 698         char *dup, *dev_name = NULL;
 699
 700         if (str == NULL) {
 701                 DPAA_BUS_DEBUG("No device string");
 702                 return NULL;
 703         }
 704
 705         /* Expectation is that device would be name=device_name */
 706         if (strncmp(str, "name=", 5) != 0) {
 707                 DPAA_BUS_DEBUG("Invalid device string (%s)\n", str);
 708                 return NULL;
 709         }
 710
 711         /* Now that name=device_name format is available, split */
 712         dup = strdup(str);
 713         dev_name = dup + strlen("name=");
 714
 715         if (start != NULL) {
 716                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 717                 dev = TAILQ_NEXT(dstart, next);
 718         } else {
 719                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 720         }
 721
 722         while (dev != NULL) {
 723                 if (strcmp(dev->device.name, dev_name) == 0) {
 724                         free(dup);
 725                         return &dev->device;
 726                 }
 727                 dev = TAILQ_NEXT(dev, next);
 728         }
 729
 730         free(dup);
 731         return NULL;
 732 }
 733
 734 static struct rte_dpaa_bus rte_dpaa_bus = {
 735         .bus = {
 736                 .scan = rte_dpaa_bus_scan,
 737                 .probe = rte_dpaa_bus_probe,
 738                 .parse = rte_dpaa_bus_parse,
 739                 .find_device = rte_dpaa_find_device,
 740                 .get_iommu_class = rte_dpaa_get_iommu_class,
 741                 .plug = dpaa_bus_plug,
 742                 .unplug = dpaa_bus_unplug,
 743                 .dev_iterate = dpaa_bus_dev_iterate,
 744         },
 745         .device_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.device_list),
 746         .driver_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.driver_list),
 747         .device_count = 0,
 748 };
 749
 750 RTE_REGISTER_BUS(FSL_DPAA_BUS_NAME, rte_dpaa_bus.bus);
 751 RTE_LOG_REGISTER(dpaa_logtype_bus, bus.dpaa, NOTICE);