drivers/bus/fslmc/fslmc_bus.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2016,2018-2021 NXP
   4  *
   5  */
   6
   7 #include <string.h>
   8 #include <dirent.h>
   9 #include <stdbool.h>
  10
  11 #include <rte_log.h>
  12 #include <rte_bus.h>
  13 #include <rte_malloc.h>
  14 #include <rte_devargs.h>
  15 #include <rte_memcpy.h>
  16 #include <ethdev_driver.h>
  17 #include <rte_mbuf_dyn.h>
  18
  19 #include <rte_fslmc.h>
  20 #include <fslmc_vfio.h>
  21 #include "fslmc_logs.h"
  22
  23 #include <dpaax_iova_table.h>
  24
  25 #define VFIO_IOMMU_GROUP_PATH "/sys/kernel/iommu_groups"
  26 #define FSLMC_BUS_NAME  fslmc
  27
  28 struct rte_fslmc_bus rte_fslmc_bus;
  29 uint8_t dpaa2_virt_mode;
  30
  31 #define DPAA2_SEQN_DYNFIELD_NAME "dpaa2_seqn_dynfield"
  32 int dpaa2_seqn_dynfield_offset = -1;
  33
  34 uint32_t
  35 rte_fslmc_get_device_count(enum rte_dpaa2_dev_type device_type)
  36 {
  37         if (device_type >= DPAA2_DEVTYPE_MAX)
  38                 return 0;
  39         return rte_fslmc_bus.device_count[device_type];
  40 }
  41
  42 static void
  43 cleanup_fslmc_device_list(void)
  44 {
  45         struct rte_dpaa2_device *dev;
  46         struct rte_dpaa2_device *t_dev;
  47
  48         RTE_TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, t_dev) {
  49                 TAILQ_REMOVE(&rte_fslmc_bus.device_list, dev, next);
  50                 rte_intr_instance_free(dev->intr_handle);
  51                 free(dev);
  52                 dev = NULL;
  53         }
  54 }
  55
  56 static int
  57 compare_dpaa2_devname(struct rte_dpaa2_device *dev1,
  58                       struct rte_dpaa2_device *dev2)
  59 {
  60         int comp;
  61
  62         if (dev1->dev_type > dev2->dev_type) {
  63                 comp = 1;
  64         } else if (dev1->dev_type < dev2->dev_type) {
  65                 comp = -1;
  66         } else {
  67                 /* Check the ID as types match */
  68                 if (dev1->object_id > dev2->object_id)
  69                         comp = 1;
  70                 else if (dev1->object_id < dev2->object_id)
  71                         comp = -1;
  72                 else
  73                         comp = 0; /* Duplicate device name */
  74         }
  75
  76         return comp;
  77 }
  78
  79 static void
  80 insert_in_device_list(struct rte_dpaa2_device *newdev)
  81 {
  82         int comp, inserted = 0;
  83         struct rte_dpaa2_device *dev = NULL;
  84         struct rte_dpaa2_device *tdev = NULL;
  85
  86         RTE_TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, tdev) {
  87                 comp = compare_dpaa2_devname(newdev, dev);
  88                 if (comp < 0) {
  89                         TAILQ_INSERT_BEFORE(dev, newdev, next);
  90                         inserted = 1;
  91                         break;
  92                 }
  93         }
  94
  95         if (!inserted)
  96                 TAILQ_INSERT_TAIL(&rte_fslmc_bus.device_list, newdev, next);
  97 }
  98
  99 static struct rte_devargs *
 100 fslmc_devargs_lookup(struct rte_dpaa2_device *dev)
 101 {
 102         struct rte_devargs *devargs;
 103         char dev_name[32];
 104
 105         RTE_EAL_DEVARGS_FOREACH("fslmc", devargs) {
 106                 devargs->bus->parse(devargs->name, &dev_name);
 107                 if (strcmp(dev_name, dev->device.name) == 0) {
 108                         DPAA2_BUS_INFO("**Devargs matched %s", dev_name);
 109                         return devargs;
 110                 }
 111         }
 112         return NULL;
 113 }
 114
 115 static void
 116 dump_device_list(void)
 117 {
 118         struct rte_dpaa2_device *dev;
 119
 120         /* Only if the log level has been set to Debugging, print list */
 121         if (rte_log_can_log(dpaa2_logtype_bus, RTE_LOG_DEBUG)) {
 122                 DPAA2_BUS_LOG(DEBUG, "List of devices scanned on bus:");
 123                 TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
 124                         DPAA2_BUS_LOG(DEBUG, "\t\t%s", dev->device.name);
 125                 }
 126         }
 127 }
 128
 129 static int
 130 scan_one_fslmc_device(char *dev_name)
 131 {
 132         char *dup_dev_name, *t_ptr;
 133         struct rte_dpaa2_device *dev = NULL;
 134         int ret = -1;
 135
 136         if (!dev_name)
 137                 return ret;
 138
 139         /* Creating a temporary copy to perform cut-parse over string */
 140         dup_dev_name = strdup(dev_name);
 141         if (!dup_dev_name) {
 142                 DPAA2_BUS_ERR("Unable to allocate device name memory");
 143                 return -ENOMEM;
 144         }
 145
 146         /* For all other devices, we allocate rte_dpaa2_device.
 147          * For those devices where there is no driver, probe would release
 148          * the memory associated with the rte_dpaa2_device after necessary
 149          * initialization.
 150          */
 151         dev = calloc(1, sizeof(struct rte_dpaa2_device));
 152         if (!dev) {
 153                 DPAA2_BUS_ERR("Unable to allocate device object");
 154                 free(dup_dev_name);
 155                 return -ENOMEM;
 156         }
 157
 158         dev->device.bus = &rte_fslmc_bus.bus;
 159
 160         /* Allocate interrupt instance */
 161         dev->intr_handle =
 162                 rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_PRIVATE);
 163         if (dev->intr_handle == NULL) {
 164                 DPAA2_BUS_ERR("Failed to allocate intr handle");
 165                 ret = -ENOMEM;
 166                 goto cleanup;
 167         }
 168
 169         /* Parse the device name and ID */
 170         t_ptr = strtok(dup_dev_name, ".");
 171         if (!t_ptr) {
 172                 DPAA2_BUS_ERR("Invalid device found: (%s)", dup_dev_name);
 173                 ret = -EINVAL;
 174                 goto cleanup;
 175         }
 176         if (!strncmp("dpni", t_ptr, 4))
 177                 dev->dev_type = DPAA2_ETH;
 178         else if (!strncmp("dpseci", t_ptr, 6))
 179                 dev->dev_type = DPAA2_CRYPTO;
 180         else if (!strncmp("dpcon", t_ptr, 5))
 181                 dev->dev_type = DPAA2_CON;
 182         else if (!strncmp("dpbp", t_ptr, 4))
 183                 dev->dev_type = DPAA2_BPOOL;
 184         else if (!strncmp("dpio", t_ptr, 4))
 185                 dev->dev_type = DPAA2_IO;
 186         else if (!strncmp("dpci", t_ptr, 4))
 187                 dev->dev_type = DPAA2_CI;
 188         else if (!strncmp("dpmcp", t_ptr, 5))
 189                 dev->dev_type = DPAA2_MPORTAL;
 190         else if (!strncmp("dpdmai", t_ptr, 6))
 191                 dev->dev_type = DPAA2_QDMA;
 192         else if (!strncmp("dpdmux", t_ptr, 6))
 193                 dev->dev_type = DPAA2_MUX;
 194         else if (!strncmp("dprtc", t_ptr, 5))
 195                 dev->dev_type = DPAA2_DPRTC;
 196         else if (!strncmp("dprc", t_ptr, 4))
 197                 dev->dev_type = DPAA2_DPRC;
 198         else
 199                 dev->dev_type = DPAA2_UNKNOWN;
 200
 201         t_ptr = strtok(NULL, ".");
 202         if (!t_ptr) {
 203                 DPAA2_BUS_ERR("Skipping invalid device (%s)", dup_dev_name);
 204                 ret = 0;
 205                 goto cleanup;
 206         }
 207
 208         sscanf(t_ptr, "%hu", &dev->object_id);
 209         dev->device.name = strdup(dev_name);
 210         if (!dev->device.name) {
 211                 DPAA2_BUS_ERR("Unable to clone device name. Out of memory");
 212                 ret = -ENOMEM;
 213                 goto cleanup;
 214         }
 215         dev->device.devargs = fslmc_devargs_lookup(dev);
 216
 217         /* Update the device found into the device_count table */
 218         rte_fslmc_bus.device_count[dev->dev_type]++;
 219
 220         /* Add device in the fslmc device list */
 221         insert_in_device_list(dev);
 222
 223         /* Don't need the duplicated device filesystem entry anymore */
 224         if (dup_dev_name)
 225                 free(dup_dev_name);
 226
 227         return 0;
 228 cleanup:
 229         if (dup_dev_name)
 230                 free(dup_dev_name);
 231         if (dev) {
 232                 rte_intr_instance_free(dev->intr_handle);
 233                 free(dev);
 234         }
 235         return ret;
 236 }
 237
 238 static int
 239 rte_fslmc_parse(const char *name, void *addr)
 240 {
 241         uint16_t dev_id;
 242         char *t_ptr;
 243         const char *sep;
 244         uint8_t sep_exists = 0;
 245         int ret = -1;
 246
 247         DPAA2_BUS_DEBUG("Parsing dev=(%s)", name);
 248
 249         /* There are multiple ways this can be called, with bus:dev, name=dev
 250          * or just dev. In all cases, the 'addr' is actually a string.
 251          */
 252         sep = strchr(name, ':');
 253         if (!sep) {
 254                 /* check for '=' */
 255                 sep = strchr(name, '=');
 256                 if (!sep)
 257                         sep_exists = 0;
 258                 else
 259                         sep_exists = 1;
 260         } else
 261                 sep_exists = 1;
 262
 263         /* Check if starting part if either of 'fslmc:' or 'name=', separator
 264          * exists.
 265          */
 266         if (sep_exists) {
 267                 /* If either of "fslmc" or "name" are starting part */
 268                 if (!strncmp(name, RTE_STR(FSLMC_BUS_NAME),
 269                              strlen(RTE_STR(FSLMC_BUS_NAME))) ||
 270                    (!strncmp(name, "name", strlen("name")))) {
 271                         goto jump_out;
 272                 } else {
 273                         DPAA2_BUS_DEBUG("Invalid device for matching (%s).",
 274                                         name);
 275                         ret = -EINVAL;
 276                         goto err_out;
 277                 }
 278         } else
 279                 sep = name;
 280
 281 jump_out:
 282         /* Validate device name */
 283         if (strncmp("dpni", sep, 4) &&
 284             strncmp("dpseci", sep, 6) &&
 285             strncmp("dpcon", sep, 5) &&
 286             strncmp("dpbp", sep, 4) &&
 287             strncmp("dpio", sep, 4) &&
 288             strncmp("dpci", sep, 4) &&
 289             strncmp("dpmcp", sep, 5) &&
 290             strncmp("dpdmai", sep, 6) &&
 291             strncmp("dpdmux", sep, 6)) {
 292                 DPAA2_BUS_DEBUG("Unknown or unsupported device (%s)", sep);
 293                 ret = -EINVAL;
 294                 goto err_out;
 295         }
 296
 297         t_ptr = strchr(sep, '.');
 298         if (!t_ptr || sscanf(t_ptr + 1, "%hu", &dev_id) != 1) {
 299                 DPAA2_BUS_ERR("Missing device id in device name (%s)", sep);
 300                 ret = -EINVAL;
 301                 goto err_out;
 302         }
 303
 304         if (addr)
 305                 strcpy(addr, sep);
 306
 307         ret = 0;
 308 err_out:
 309         return ret;
 310 }
 311
 312 static int
 313 rte_fslmc_scan(void)
 314 {
 315         int ret;
 316         char fslmc_dirpath[PATH_MAX];
 317         DIR *dir;
 318         struct dirent *entry;
 319         static int process_once;
 320         int groupid;
 321
 322         if (process_once) {
 323                 DPAA2_BUS_DEBUG("Fslmc bus already scanned. Not rescanning");
 324                 return 0;
 325         }
 326         process_once = 1;
 327
 328         ret = fslmc_get_container_group(&groupid);
 329         if (ret != 0)
 330                 goto scan_fail;
 331
 332         /* Scan devices on the group */
 333         sprintf(fslmc_dirpath, "%s/%s", SYSFS_FSL_MC_DEVICES, fslmc_container);
 334         dir = opendir(fslmc_dirpath);
 335         if (!dir) {
 336                 DPAA2_BUS_ERR("Unable to open VFIO group directory");
 337                 goto scan_fail;
 338         }
 339
 340         /* Scan the DPRC container object */
 341         ret = scan_one_fslmc_device(fslmc_container);
 342         if (ret != 0) {
 343                 /* Error in parsing directory - exit gracefully */
 344                 goto scan_fail_cleanup;
 345         }
 346
 347         while ((entry = readdir(dir)) != NULL) {
 348                 if (entry->d_name[0] == '.' || entry->d_type != DT_DIR)
 349                         continue;
 350
 351                 ret = scan_one_fslmc_device(entry->d_name);
 352                 if (ret != 0) {
 353                         /* Error in parsing directory - exit gracefully */
 354                         goto scan_fail_cleanup;
 355                 }
 356         }
 357
 358         closedir(dir);
 359
 360         DPAA2_BUS_INFO("FSLMC Bus scan completed");
 361         /* If debugging is enabled, device list is dumped to log output */
 362         dump_device_list();
 363
 364         return 0;
 365
 366 scan_fail_cleanup:
 367         closedir(dir);
 368
 369         /* Remove all devices in the list */
 370         cleanup_fslmc_device_list();
 371 scan_fail:
 372         DPAA2_BUS_DEBUG("FSLMC Bus Not Available. Skipping (%d)", ret);
 373         /* Irrespective of failure, scan only return success */
 374         return 0;
 375 }
 376
 377 static int
 378 rte_fslmc_match(struct rte_dpaa2_driver *dpaa2_drv,
 379                 struct rte_dpaa2_device *dpaa2_dev)
 380 {
 381         if (dpaa2_drv->drv_type == dpaa2_dev->dev_type)
 382                 return 0;
 383
 384         return 1;
 385 }
 386
 387 static int
 388 rte_fslmc_probe(void)
 389 {
 390         int ret = 0;
 391         int probe_all;
 392
 393         struct rte_dpaa2_device *dev;
 394         struct rte_dpaa2_driver *drv;
 395
 396         static const struct rte_mbuf_dynfield dpaa2_seqn_dynfield_desc = {
 397                 .name = DPAA2_SEQN_DYNFIELD_NAME,
 398                 .size = sizeof(dpaa2_seqn_t),
 399                 .align = __alignof__(dpaa2_seqn_t),
 400         };
 401
 402         if (TAILQ_EMPTY(&rte_fslmc_bus.device_list))
 403                 return 0;
 404
 405         dpaa2_seqn_dynfield_offset =
 406                 rte_mbuf_dynfield_register(&dpaa2_seqn_dynfield_desc);
 407         if (dpaa2_seqn_dynfield_offset < 0) {
 408                 DPAA2_BUS_ERR("Failed to register mbuf field for dpaa sequence number");
 409                 return 0;
 410         }
 411
 412         ret = fslmc_vfio_setup_group();
 413         if (ret) {
 414                 DPAA2_BUS_ERR("Unable to setup VFIO %d", ret);
 415                 return 0;
 416         }
 417
 418         /* Map existing segments as well as, in case of hotpluggable memory,
 419          * install callback handler.
 420          */
 421         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 422                 ret = rte_fslmc_vfio_dmamap();
 423                 if (ret) {
 424                         DPAA2_BUS_ERR("Unable to DMA map existing VAs: (%d)",
 425                                       ret);
 426                         /* Not continuing ahead */
 427                         DPAA2_BUS_ERR("FSLMC VFIO Mapping failed");
 428                         return 0;
 429                 }
 430         }
 431
 432         ret = fslmc_vfio_process_group();
 433         if (ret) {
 434                 DPAA2_BUS_ERR("Unable to setup devices %d", ret);
 435                 return 0;
 436         }
 437
 438         probe_all = rte_fslmc_bus.bus.conf.scan_mode != RTE_BUS_SCAN_ALLOWLIST;
 439
 440         /* In case of PA, the FD addresses returned by qbman APIs are physical
 441          * addresses, which need conversion into equivalent VA address for
 442          * rte_mbuf. For that, a table (a serial array, in memory) is used to
 443          * increase translation efficiency.
 444          * This has to be done before probe as some device initialization
 445          * (during) probe allocate memory (dpaa2_sec) which needs to be pinned
 446          * to this table.
 447          *
 448          * Error is ignored as relevant logs are handled within dpaax and
 449          * handling for unavailable dpaax table too is transparent to caller.
 450          *
 451          * And, the IOVA table is only applicable in case of PA mode.
 452          */
 453         if (rte_eal_iova_mode() == RTE_IOVA_PA)
 454                 dpaax_iova_table_populate();
 455
 456         TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
 457                 TAILQ_FOREACH(drv, &rte_fslmc_bus.driver_list, next) {
 458                         ret = rte_fslmc_match(drv, dev);
 459                         if (ret)
 460                                 continue;
 461
 462                         if (!drv->probe)
 463                                 continue;
 464
 465                         if (rte_dev_is_probed(&dev->device))
 466                                 continue;
 467
 468                         if (dev->device.devargs &&
 469                             dev->device.devargs->policy == RTE_DEV_BLOCKED) {
 470                                 DPAA2_BUS_LOG(DEBUG, "%s Blocked, skipping",
 471                                               dev->device.name);
 472                                 continue;
 473                         }
 474
 475                         if (probe_all ||
 476                            (dev->device.devargs &&
 477                             dev->device.devargs->policy == RTE_DEV_ALLOWED)) {
 478                                 ret = drv->probe(drv, dev);
 479                                 if (ret) {
 480                                         DPAA2_BUS_ERR("Unable to probe");
 481                                 } else {
 482                                         dev->driver = drv;
 483                                         dev->device.driver = &drv->driver;
 484                                 }
 485                         }
 486                         break;
 487                 }
 488         }
 489
 490         if (rte_eal_iova_mode() == RTE_IOVA_VA)
 491                 dpaa2_virt_mode = 1;
 492
 493         return 0;
 494 }
 495
 496 static struct rte_device *
 497 rte_fslmc_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 498                       const void *data)
 499 {
 500         const struct rte_dpaa2_device *dstart;
 501         struct rte_dpaa2_device *dev;
 502
 503         DPAA2_BUS_DEBUG("Finding a device named %s\n", (const char *)data);
 504
 505         /* find_device is always called with an opaque object which should be
 506          * passed along to the 'cmp' function iterating over all device obj
 507          * on the bus.
 508          */
 509
 510         if (start != NULL) {
 511                 dstart = RTE_DEV_TO_FSLMC_CONST(start);
 512                 dev = TAILQ_NEXT(dstart, next);
 513         } else {
 514                 dev = TAILQ_FIRST(&rte_fslmc_bus.device_list);
 515         }
 516         while (dev != NULL) {
 517                 if (cmp(&dev->device, data) == 0) {
 518                         DPAA2_BUS_DEBUG("Found device (%s)\n",
 519                                         dev->device.name);
 520                         return &dev->device;
 521                 }
 522                 dev = TAILQ_NEXT(dev, next);
 523         }
 524
 525         return NULL;
 526 }
 527
 528 /*register a fslmc bus based dpaa2 driver */
 529 void
 530 rte_fslmc_driver_register(struct rte_dpaa2_driver *driver)
 531 {
 532         RTE_VERIFY(driver);
 533
 534         TAILQ_INSERT_TAIL(&rte_fslmc_bus.driver_list, driver, next);
 535         /* Update Bus references */
 536         driver->fslmc_bus = &rte_fslmc_bus;
 537 }
 538
 539 /*un-register a fslmc bus based dpaa2 driver */
 540 void
 541 rte_fslmc_driver_unregister(struct rte_dpaa2_driver *driver)
 542 {
 543         struct rte_fslmc_bus *fslmc_bus;
 544
 545         fslmc_bus = driver->fslmc_bus;
 546
 547         /* Cleanup the PA->VA Translation table; From wherever this function
 548          * is called from.
 549          */
 550         if (rte_eal_iova_mode() == RTE_IOVA_PA)
 551                 dpaax_iova_table_depopulate();
 552
 553         TAILQ_REMOVE(&fslmc_bus->driver_list, driver, next);
 554         /* Update Bus references */
 555         driver->fslmc_bus = NULL;
 556 }
 557
 558 /*
 559  * All device has iova as va
 560  */
 561 static inline int
 562 fslmc_all_device_support_iova(void)
 563 {
 564         int ret = 0;
 565         struct rte_dpaa2_device *dev;
 566         struct rte_dpaa2_driver *drv;
 567
 568         TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
 569                 TAILQ_FOREACH(drv, &rte_fslmc_bus.driver_list, next) {
 570                         ret = rte_fslmc_match(drv, dev);
 571                         if (ret)
 572                                 continue;
 573                         /* if the driver is not supporting IOVA */
 574                         if (!(drv->drv_flags & RTE_DPAA2_DRV_IOVA_AS_VA))
 575                                 return 0;
 576                 }
 577         }
 578         return 1;
 579 }
 580
 581 /*
 582  * Get iommu class of DPAA2 devices on the bus.
 583  */
 584 static enum rte_iova_mode
 585 rte_dpaa2_get_iommu_class(void)
 586 {
 587         bool is_vfio_noiommu_enabled = 1;
 588         bool has_iova_va;
 589
 590         if (TAILQ_EMPTY(&rte_fslmc_bus.device_list))
 591                 return RTE_IOVA_DC;
 592
 593 #ifdef RTE_LIBRTE_DPAA2_USE_PHYS_IOVA
 594         return RTE_IOVA_PA;
 595 #endif
 596
 597         /* check if all devices on the bus support Virtual addressing or not */
 598         has_iova_va = fslmc_all_device_support_iova();
 599
 600 #ifdef VFIO_PRESENT
 601         is_vfio_noiommu_enabled = rte_vfio_noiommu_is_enabled() == true ?
 602                                                 true : false;
 603 #endif
 604
 605         if (has_iova_va && !is_vfio_noiommu_enabled)
 606                 return RTE_IOVA_VA;
 607
 608         return RTE_IOVA_PA;
 609 }
 610
 611 static int
 612 fslmc_bus_plug(struct rte_device *dev __rte_unused)
 613 {
 614         /* No operation is performed while plugging the device */
 615         return 0;
 616 }
 617
 618 static int
 619 fslmc_bus_unplug(struct rte_device *dev __rte_unused)
 620 {
 621         /* No operation is performed while unplugging the device */
 622         return 0;
 623 }
 624
 625 static void *
 626 fslmc_bus_dev_iterate(const void *start, const char *str,
 627                       const struct rte_dev_iterator *it __rte_unused)
 628 {
 629         const struct rte_dpaa2_device *dstart;
 630         struct rte_dpaa2_device *dev;
 631         char *dup, *dev_name = NULL;
 632
 633         if (str == NULL) {
 634                 DPAA2_BUS_DEBUG("No device string");
 635                 return NULL;
 636         }
 637
 638         /* Expectation is that device would be name=device_name */
 639         if (strncmp(str, "name=", 5) != 0) {
 640                 DPAA2_BUS_DEBUG("Invalid device string (%s)\n", str);
 641                 return NULL;
 642         }
 643
 644         /* Now that name=device_name format is available, split */
 645         dup = strdup(str);
 646         dev_name = dup + strlen("name=");
 647
 648         if (start != NULL) {
 649                 dstart = RTE_DEV_TO_FSLMC_CONST(start);
 650                 dev = TAILQ_NEXT(dstart, next);
 651         } else {
 652                 dev = TAILQ_FIRST(&rte_fslmc_bus.device_list);
 653         }
 654
 655         while (dev != NULL) {
 656                 if (strcmp(dev->device.name, dev_name) == 0) {
 657                         free(dup);
 658                         return &dev->device;
 659                 }
 660                 dev = TAILQ_NEXT(dev, next);
 661         }
 662
 663         free(dup);
 664         return NULL;
 665 }
 666
 667 struct rte_fslmc_bus rte_fslmc_bus = {
 668         .bus = {
 669                 .scan = rte_fslmc_scan,
 670                 .probe = rte_fslmc_probe,
 671                 .parse = rte_fslmc_parse,
 672                 .find_device = rte_fslmc_find_device,
 673                 .get_iommu_class = rte_dpaa2_get_iommu_class,
 674                 .plug = fslmc_bus_plug,
 675                 .unplug = fslmc_bus_unplug,
 676                 .dev_iterate = fslmc_bus_dev_iterate,
 677         },
 678         .device_list = TAILQ_HEAD_INITIALIZER(rte_fslmc_bus.device_list),
 679         .driver_list = TAILQ_HEAD_INITIALIZER(rte_fslmc_bus.driver_list),
 680         .device_count = {0},
 681 };
 682
 683 RTE_REGISTER_BUS(FSLMC_BUS_NAME, rte_fslmc_bus.bus);
 684 RTE_LOG_REGISTER_DEFAULT(dpaa2_logtype_bus, NOTICE);