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 int dpaa_logtype_bus;
  46
  47 static struct rte_dpaa_bus rte_dpaa_bus;
  48 struct netcfg_info *dpaa_netcfg;
  49
  50 /* define a variable to hold the portal_key, once created.*/
  51 static pthread_key_t dpaa_portal_key;
  52
  53 unsigned int dpaa_svr_family;
  54
  55 #define FSL_DPAA_BUS_NAME       dpaa_bus
  56
  57 RTE_DEFINE_PER_LCORE(bool, dpaa_io);
  58 RTE_DEFINE_PER_LCORE(struct dpaa_portal_dqrr, held_bufs);
  59
  60 struct fm_eth_port_cfg *
  61 dpaa_get_eth_port_cfg(int dev_id)
  62 {
  63         return &dpaa_netcfg->port_cfg[dev_id];
  64 }
  65
  66 static int
  67 compare_dpaa_devices(struct rte_dpaa_device *dev1,
  68                      struct rte_dpaa_device *dev2)
  69 {
  70         int comp = 0;
  71
  72         /* Segragating ETH from SEC devices */
  73         if (dev1->device_type > dev2->device_type)
  74                 comp = 1;
  75         else if (dev1->device_type < dev2->device_type)
  76                 comp = -1;
  77         else
  78                 comp = 0;
  79
  80         if ((comp != 0) || (dev1->device_type != FSL_DPAA_ETH))
  81                 return comp;
  82
  83         if (dev1->id.fman_id > dev2->id.fman_id) {
  84                 comp = 1;
  85         } else if (dev1->id.fman_id < dev2->id.fman_id) {
  86                 comp = -1;
  87         } else {
  88                 /* FMAN ids match, check for mac_id */
  89                 if (dev1->id.mac_id > dev2->id.mac_id)
  90                         comp = 1;
  91                 else if (dev1->id.mac_id < dev2->id.mac_id)
  92                         comp = -1;
  93                 else
  94                         comp = 0;
  95         }
  96
  97         return comp;
  98 }
  99
 100 static inline void
 101 dpaa_add_to_device_list(struct rte_dpaa_device *newdev)
 102 {
 103         int comp, inserted = 0;
 104         struct rte_dpaa_device *dev = NULL;
 105         struct rte_dpaa_device *tdev = NULL;
 106
 107         TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 108                 comp = compare_dpaa_devices(newdev, dev);
 109                 if (comp < 0) {
 110                         TAILQ_INSERT_BEFORE(dev, newdev, next);
 111                         inserted = 1;
 112                         break;
 113                 }
 114         }
 115
 116         if (!inserted)
 117                 TAILQ_INSERT_TAIL(&rte_dpaa_bus.device_list, newdev, next);
 118 }
 119
 120 /*
 121  * Reads the SEC device from DTS
 122  * Returns -1 if SEC devices not available, 0 otherwise
 123  */
 124 static inline int
 125 dpaa_sec_available(void)
 126 {
 127         const struct device_node *caam_node;
 128
 129         for_each_compatible_node(caam_node, NULL, "fsl,sec-v4.0") {
 130                 return 0;
 131         }
 132
 133         return -1;
 134 }
 135
 136 static void dpaa_clean_device_list(void);
 137
 138 static struct rte_devargs *
 139 dpaa_devargs_lookup(struct rte_dpaa_device *dev)
 140 {
 141         struct rte_devargs *devargs;
 142         char dev_name[32];
 143
 144         RTE_EAL_DEVARGS_FOREACH("dpaa_bus", devargs) {
 145                 devargs->bus->parse(devargs->name, &dev_name);
 146                 if (strcmp(dev_name, dev->device.name) == 0) {
 147                         DPAA_BUS_INFO("**Devargs matched %s", dev_name);
 148                         return devargs;
 149                 }
 150         }
 151         return NULL;
 152 }
 153
 154 static int
 155 dpaa_create_device_list(void)
 156 {
 157         int i;
 158         int ret;
 159         struct rte_dpaa_device *dev;
 160         struct fm_eth_port_cfg *cfg;
 161         struct fman_if *fman_intf;
 162
 163         /* Creating Ethernet Devices */
 164         for (i = 0; i < dpaa_netcfg->num_ethports; i++) {
 165                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 166                 if (!dev) {
 167                         DPAA_BUS_LOG(ERR, "Failed to allocate ETH devices");
 168                         ret = -ENOMEM;
 169                         goto cleanup;
 170                 }
 171
 172                 dev->device.bus = &rte_dpaa_bus.bus;
 173
 174                 cfg = &dpaa_netcfg->port_cfg[i];
 175                 fman_intf = cfg->fman_if;
 176
 177                 /* Device identifiers */
 178                 dev->id.fman_id = fman_intf->fman_idx + 1;
 179                 dev->id.mac_id = fman_intf->mac_idx;
 180                 dev->device_type = FSL_DPAA_ETH;
 181                 dev->id.dev_id = i;
 182
 183                 /* Create device name */
 184                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 185                 sprintf(dev->name, "fm%d-mac%d", (fman_intf->fman_idx + 1),
 186                         fman_intf->mac_idx);
 187                 DPAA_BUS_LOG(INFO, "%s netdev added", dev->name);
 188                 dev->device.name = dev->name;
 189                 dev->device.devargs = dpaa_devargs_lookup(dev);
 190
 191                 dpaa_add_to_device_list(dev);
 192         }
 193
 194         rte_dpaa_bus.device_count = i;
 195
 196         /* Unlike case of ETH, RTE_LIBRTE_DPAA_MAX_CRYPTODEV SEC devices are
 197          * constantly created only if "sec" property is found in the device
 198          * tree. Logically there is no limit for number of devices (QI
 199          * interfaces) that can be created.
 200          */
 201
 202         if (dpaa_sec_available()) {
 203                 DPAA_BUS_LOG(INFO, "DPAA SEC devices are not available");
 204                 return 0;
 205         }
 206
 207         /* Creating SEC Devices */
 208         for (i = 0; i < RTE_LIBRTE_DPAA_MAX_CRYPTODEV; i++) {
 209                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 210                 if (!dev) {
 211                         DPAA_BUS_LOG(ERR, "Failed to allocate SEC devices");
 212                         ret = -1;
 213                         goto cleanup;
 214                 }
 215
 216                 dev->device_type = FSL_DPAA_CRYPTO;
 217                 dev->id.dev_id = rte_dpaa_bus.device_count + i;
 218
 219                 /* Even though RTE_CRYPTODEV_NAME_MAX_LEN is valid length of
 220                  * crypto PMD, using RTE_ETH_NAME_MAX_LEN as that is the size
 221                  * allocated for dev->name/
 222                  */
 223                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 224                 sprintf(dev->name, "dpaa_sec-%d", i+1);
 225                 DPAA_BUS_LOG(INFO, "%s cryptodev added", dev->name);
 226                 dev->device.name = dev->name;
 227                 dev->device.devargs = dpaa_devargs_lookup(dev);
 228
 229                 dpaa_add_to_device_list(dev);
 230         }
 231
 232         rte_dpaa_bus.device_count += i;
 233
 234         return 0;
 235
 236 cleanup:
 237         dpaa_clean_device_list();
 238         return ret;
 239 }
 240
 241 static void
 242 dpaa_clean_device_list(void)
 243 {
 244         struct rte_dpaa_device *dev = NULL;
 245         struct rte_dpaa_device *tdev = NULL;
 246
 247         TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 248                 TAILQ_REMOVE(&rte_dpaa_bus.device_list, dev, next);
 249                 free(dev);
 250                 dev = NULL;
 251         }
 252 }
 253
 254 int rte_dpaa_portal_init(void *arg)
 255 {
 256         unsigned int cpu, lcore = rte_lcore_id();
 257         int ret;
 258         struct dpaa_portal *dpaa_io_portal;
 259
 260         BUS_INIT_FUNC_TRACE();
 261
 262         if ((size_t)arg == 1 || lcore == LCORE_ID_ANY)
 263                 lcore = rte_get_master_lcore();
 264         else
 265                 if (lcore >= RTE_MAX_LCORE)
 266                         return -1;
 267
 268         cpu = rte_lcore_to_cpu_id(lcore);
 269
 270         /* Initialise bman thread portals */
 271         ret = bman_thread_init();
 272         if (ret) {
 273                 DPAA_BUS_LOG(ERR, "bman_thread_init failed on core %u"
 274                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 275                 return ret;
 276         }
 277
 278         DPAA_BUS_LOG(DEBUG, "BMAN thread initialized - CPU=%d lcore=%d",
 279                      cpu, lcore);
 280
 281         /* Initialise qman thread portals */
 282         ret = qman_thread_init();
 283         if (ret) {
 284                 DPAA_BUS_LOG(ERR, "qman_thread_init failed on core %u"
 285                             " (lcore=%u) with ret: %d", cpu, lcore, ret);
 286                 bman_thread_finish();
 287                 return ret;
 288         }
 289
 290         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized - CPU=%d lcore=%d",
 291                      cpu, lcore);
 292
 293         dpaa_io_portal = rte_malloc(NULL, sizeof(struct dpaa_portal),
 294                                     RTE_CACHE_LINE_SIZE);
 295         if (!dpaa_io_portal) {
 296                 DPAA_BUS_LOG(ERR, "Unable to allocate memory");
 297                 bman_thread_finish();
 298                 qman_thread_finish();
 299                 return -ENOMEM;
 300         }
 301
 302         dpaa_io_portal->qman_idx = qman_get_portal_index();
 303         dpaa_io_portal->bman_idx = bman_get_portal_index();
 304         dpaa_io_portal->tid = syscall(SYS_gettid);
 305
 306         ret = pthread_setspecific(dpaa_portal_key, (void *)dpaa_io_portal);
 307         if (ret) {
 308                 DPAA_BUS_LOG(ERR, "pthread_setspecific failed on core %u"
 309                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 310                 dpaa_portal_finish(NULL);
 311
 312                 return ret;
 313         }
 314
 315         RTE_PER_LCORE(dpaa_io) = true;
 316
 317         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized");
 318
 319         return 0;
 320 }
 321
 322 int
 323 rte_dpaa_portal_fq_init(void *arg, struct qman_fq *fq)
 324 {
 325         /* Affine above created portal with channel*/
 326         u32 sdqcr;
 327         int ret;
 328
 329         if (unlikely(!RTE_PER_LCORE(dpaa_io))) {
 330                 ret = rte_dpaa_portal_init(arg);
 331                 if (ret < 0) {
 332                         DPAA_BUS_LOG(ERR, "portal initialization failure");
 333                         return ret;
 334                 }
 335         }
 336
 337         /* Initialise qman specific portals */
 338         ret = fsl_qman_fq_portal_init(fq->qp);
 339         if (ret) {
 340                 DPAA_BUS_LOG(ERR, "Unable to init fq portal");
 341                 return -1;
 342         }
 343
 344         sdqcr = QM_SDQCR_CHANNELS_POOL_CONV(fq->ch_id);
 345         qman_static_dequeue_add(sdqcr, fq->qp);
 346
 347         return 0;
 348 }
 349
 350 int rte_dpaa_portal_fq_close(struct qman_fq *fq)
 351 {
 352         return fsl_qman_fq_portal_destroy(fq->qp);
 353 }
 354
 355 void
 356 dpaa_portal_finish(void *arg)
 357 {
 358         struct dpaa_portal *dpaa_io_portal = (struct dpaa_portal *)arg;
 359
 360         if (!dpaa_io_portal) {
 361                 DPAA_BUS_LOG(DEBUG, "Portal already cleaned");
 362                 return;
 363         }
 364
 365         bman_thread_finish();
 366         qman_thread_finish();
 367
 368         pthread_setspecific(dpaa_portal_key, NULL);
 369
 370         rte_free(dpaa_io_portal);
 371         dpaa_io_portal = NULL;
 372
 373         RTE_PER_LCORE(dpaa_io) = false;
 374 }
 375
 376 static int
 377 rte_dpaa_bus_parse(const char *name, void *out_name)
 378 {
 379         int i, j;
 380         int max_fman = 2, max_macs = 16;
 381         char *dup_name;
 382         char *sep = NULL;
 383
 384         /* There are two ways of passing device name, with and without
 385          * separator. "dpaa_bus:fm1-mac3" with separator, and "fm1-mac3"
 386          * without separator. Both need to be handled.
 387          * It is also possible that "name=fm1-mac3" is passed along.
 388          */
 389         DPAA_BUS_DEBUG("Parse device name (%s)", name);
 390
 391         /* Check for dpaa_bus:fm1-mac3 style */
 392         dup_name = strdup(name);
 393         sep = strchr(dup_name, ':');
 394         if (!sep)
 395                 /* If not, check for name=fm1-mac3 style */
 396                 sep = strchr(dup_name, '=');
 397
 398         if (sep)
 399                 /* jump over the seprator */
 400                 sep = (char *) (sep + 1);
 401         else
 402                 sep = dup_name;
 403
 404         for (i = 0; i < max_fman; i++) {
 405                 for (j = 0; j < max_macs; j++) {
 406                         char fm_name[16];
 407                         snprintf(fm_name, 16, "fm%d-mac%d", i, j);
 408                         if (strcmp(fm_name, sep) == 0) {
 409                                 if (out_name)
 410                                         strcpy(out_name, sep);
 411                                 free(dup_name);
 412                                 return 0;
 413                         }
 414                 }
 415         }
 416
 417         for (i = 0; i < RTE_LIBRTE_DPAA_MAX_CRYPTODEV; i++) {
 418                 char sec_name[16];
 419
 420                 snprintf(sec_name, 16, "dpaa_sec-%d", i+1);
 421                 if (strcmp(sec_name, sep) == 0) {
 422                         if (out_name)
 423                                 strcpy(out_name, sep);
 424                         free(dup_name);
 425                         return 0;
 426                 }
 427         }
 428
 429         free(dup_name);
 430         return -EINVAL;
 431 }
 432
 433 #define DPAA_DEV_PATH1 "/sys/devices/platform/soc/soc:fsl,dpaa"
 434 #define DPAA_DEV_PATH2 "/sys/devices/platform/fsl,dpaa"
 435
 436 static int
 437 rte_dpaa_bus_scan(void)
 438 {
 439         int ret;
 440
 441         BUS_INIT_FUNC_TRACE();
 442
 443         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 444             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 445                 RTE_LOG(DEBUG, EAL, "DPAA Bus not present. Skipping.\n");
 446                 return 0;
 447         }
 448
 449         if (rte_dpaa_bus.detected)
 450                 return 0;
 451
 452         rte_dpaa_bus.detected = 1;
 453
 454         /* create the key, supplying a function that'll be invoked
 455          * when a portal affined thread will be deleted.
 456          */
 457         ret = pthread_key_create(&dpaa_portal_key, dpaa_portal_finish);
 458         if (ret) {
 459                 DPAA_BUS_LOG(DEBUG, "Unable to create pthread key. (%d)", ret);
 460                 dpaa_clean_device_list();
 461                 return ret;
 462         }
 463
 464         return 0;
 465 }
 466
 467 /* register a dpaa bus based dpaa driver */
 468 void
 469 rte_dpaa_driver_register(struct rte_dpaa_driver *driver)
 470 {
 471         RTE_VERIFY(driver);
 472
 473         BUS_INIT_FUNC_TRACE();
 474
 475         TAILQ_INSERT_TAIL(&rte_dpaa_bus.driver_list, driver, next);
 476         /* Update Bus references */
 477         driver->dpaa_bus = &rte_dpaa_bus;
 478 }
 479
 480 /* un-register a dpaa bus based dpaa driver */
 481 void
 482 rte_dpaa_driver_unregister(struct rte_dpaa_driver *driver)
 483 {
 484         struct rte_dpaa_bus *dpaa_bus;
 485
 486         BUS_INIT_FUNC_TRACE();
 487
 488         dpaa_bus = driver->dpaa_bus;
 489
 490         TAILQ_REMOVE(&dpaa_bus->driver_list, driver, next);
 491         /* Update Bus references */
 492         driver->dpaa_bus = NULL;
 493 }
 494
 495 static int
 496 rte_dpaa_device_match(struct rte_dpaa_driver *drv,
 497                       struct rte_dpaa_device *dev)
 498 {
 499         if (!drv || !dev) {
 500                 DPAA_BUS_DEBUG("Invalid drv or dev received.");
 501                 return -1;
 502         }
 503
 504         if (drv->drv_type == dev->device_type)
 505                 return 0;
 506
 507         return -1;
 508 }
 509
 510 static int
 511 rte_dpaa_bus_dev_build(void)
 512 {
 513         int ret;
 514
 515         /* Load the device-tree driver */
 516         ret = of_init();
 517         if (ret) {
 518                 DPAA_BUS_LOG(ERR, "of_init failed with ret: %d", ret);
 519                 return -1;
 520         }
 521
 522         /* Get the interface configurations from device-tree */
 523         dpaa_netcfg = netcfg_acquire();
 524         if (!dpaa_netcfg) {
 525                 DPAA_BUS_LOG(ERR, "netcfg_acquire failed");
 526                 return -EINVAL;
 527         }
 528
 529         RTE_LOG(NOTICE, EAL, "DPAA Bus Detected\n");
 530
 531         if (!dpaa_netcfg->num_ethports) {
 532                 DPAA_BUS_LOG(INFO, "no network interfaces available");
 533                 /* This is not an error */
 534                 return 0;
 535         }
 536
 537 #ifdef RTE_LIBRTE_DPAA_DEBUG_DRIVER
 538         dump_netcfg(dpaa_netcfg);
 539 #endif
 540
 541         DPAA_BUS_LOG(DEBUG, "Number of ethernet devices = %d",
 542                      dpaa_netcfg->num_ethports);
 543         ret = dpaa_create_device_list();
 544         if (ret) {
 545                 DPAA_BUS_LOG(ERR, "Unable to create device list. (%d)", ret);
 546                 return ret;
 547         }
 548         return 0;
 549 }
 550
 551 static int
 552 rte_dpaa_bus_probe(void)
 553 {
 554         int ret = -1;
 555         struct rte_dpaa_device *dev;
 556         struct rte_dpaa_driver *drv;
 557         FILE *svr_file = NULL;
 558         unsigned int svr_ver;
 559         int probe_all = rte_dpaa_bus.bus.conf.scan_mode != RTE_BUS_SCAN_WHITELIST;
 560         static int process_once;
 561
 562         /* If DPAA bus is not present nothing needs to be done */
 563         if (!rte_dpaa_bus.detected)
 564                 return 0;
 565
 566         /* Device list creation is only done once */
 567         if (!process_once) {
 568                 rte_dpaa_bus_dev_build();
 569                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 570                         /* One time load of Qman/Bman drivers */
 571                         ret = qman_global_init();
 572                         if (ret) {
 573                                 DPAA_BUS_ERR("QMAN initialization failed: %d",
 574                                              ret);
 575                                 return ret;
 576                         }
 577                         ret = bman_global_init();
 578                         if (ret) {
 579                                 DPAA_BUS_ERR("BMAN initialization failed: %d",
 580                                              ret);
 581                                 return ret;
 582                         }
 583                 }
 584         }
 585         process_once = 1;
 586
 587         /* If no device present on DPAA bus nothing needs to be done */
 588         if (TAILQ_EMPTY(&rte_dpaa_bus.device_list))
 589                 return 0;
 590
 591         svr_file = fopen(DPAA_SOC_ID_FILE, "r");
 592         if (svr_file) {
 593                 if (fscanf(svr_file, "svr:%x", &svr_ver) > 0)
 594                         dpaa_svr_family = svr_ver & SVR_MASK;
 595                 fclose(svr_file);
 596         }
 597
 598         /* And initialize the PA->VA translation table */
 599         dpaax_iova_table_populate();
 600
 601         /* For each registered driver, and device, call the driver->probe */
 602         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 603                 TAILQ_FOREACH(drv, &rte_dpaa_bus.driver_list, next) {
 604                         ret = rte_dpaa_device_match(drv, dev);
 605                         if (ret)
 606                                 continue;
 607
 608                         if (rte_dev_is_probed(&dev->device))
 609                                 continue;
 610
 611                         if (!drv->probe ||
 612                             (dev->device.devargs &&
 613                             dev->device.devargs->policy == RTE_DEV_BLACKLISTED))
 614                                 continue;
 615
 616                         if (probe_all ||
 617                             (dev->device.devargs &&
 618                             dev->device.devargs->policy ==
 619                             RTE_DEV_WHITELISTED)) {
 620                                 ret = drv->probe(drv, dev);
 621                                 if (ret) {
 622                                         DPAA_BUS_ERR("unable to probe:%s",
 623                                                      dev->name);
 624                                 } else {
 625                                         dev->driver = drv;
 626                                         dev->device.driver = &drv->driver;
 627                                 }
 628                         }
 629                         break;
 630                 }
 631         }
 632
 633         /* Register DPAA mempool ops only if any DPAA device has
 634          * been detected.
 635          */
 636         rte_mbuf_set_platform_mempool_ops(DPAA_MEMPOOL_OPS_NAME);
 637
 638         return 0;
 639 }
 640
 641 static struct rte_device *
 642 rte_dpaa_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 643                      const void *data)
 644 {
 645         struct rte_dpaa_device *dev;
 646         const struct rte_dpaa_device *dstart;
 647
 648         /* find_device is called with 'data' as an opaque object - just call
 649          * cmp with this and each device object on bus.
 650          */
 651
 652         if (start != NULL) {
 653                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 654                 dev = TAILQ_NEXT(dstart, next);
 655         } else {
 656                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 657         }
 658
 659         while (dev != NULL) {
 660                 if (cmp(&dev->device, data) == 0) {
 661                         DPAA_BUS_DEBUG("Found dev=(%s)\n", dev->device.name);
 662                         return &dev->device;
 663                 }
 664                 dev = TAILQ_NEXT(dev, next);
 665         }
 666
 667         DPAA_BUS_DEBUG("Unable to find any device\n");
 668         return NULL;
 669 }
 670
 671 /*
 672  * Get iommu class of DPAA2 devices on the bus.
 673  */
 674 static enum rte_iova_mode
 675 rte_dpaa_get_iommu_class(void)
 676 {
 677         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 678             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 679                 return RTE_IOVA_DC;
 680         }
 681         return RTE_IOVA_PA;
 682 }
 683
 684 static int
 685 dpaa_bus_plug(struct rte_device *dev __rte_unused)
 686 {
 687         /* No operation is performed while plugging the device */
 688         return 0;
 689 }
 690
 691 static int
 692 dpaa_bus_unplug(struct rte_device *dev __rte_unused)
 693 {
 694         /* No operation is performed while unplugging the device */
 695         return 0;
 696 }
 697
 698 static void *
 699 dpaa_bus_dev_iterate(const void *start, const char *str,
 700                      const struct rte_dev_iterator *it __rte_unused)
 701 {
 702         const struct rte_dpaa_device *dstart;
 703         struct rte_dpaa_device *dev;
 704         char *dup, *dev_name = NULL;
 705
 706         /* Expectation is that device would be name=device_name */
 707         if (strncmp(str, "name=", 5) != 0) {
 708                 DPAA_BUS_DEBUG("Invalid device string (%s)\n", str);
 709                 return NULL;
 710         }
 711
 712         /* Now that name=device_name format is available, split */
 713         dup = strdup(str);
 714         dev_name = dup + strlen("name=");
 715
 716         if (start != NULL) {
 717                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 718                 dev = TAILQ_NEXT(dstart, next);
 719         } else {
 720                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 721         }
 722
 723         while (dev != NULL) {
 724                 if (strcmp(dev->device.name, dev_name) == 0) {
 725                         free(dup);
 726                         return &dev->device;
 727                 }
 728                 dev = TAILQ_NEXT(dev, next);
 729         }
 730
 731         free(dup);
 732         return NULL;
 733 }
 734
 735 static struct rte_dpaa_bus rte_dpaa_bus = {
 736         .bus = {
 737                 .scan = rte_dpaa_bus_scan,
 738                 .probe = rte_dpaa_bus_probe,
 739                 .parse = rte_dpaa_bus_parse,
 740                 .find_device = rte_dpaa_find_device,
 741                 .get_iommu_class = rte_dpaa_get_iommu_class,
 742                 .plug = dpaa_bus_plug,
 743                 .unplug = dpaa_bus_unplug,
 744                 .dev_iterate = dpaa_bus_dev_iterate,
 745         },
 746         .device_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.device_list),
 747         .driver_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.driver_list),
 748         .device_count = 0,
 749 };
 750
 751 RTE_REGISTER_BUS(FSL_DPAA_BUS_NAME, rte_dpaa_bus.bus);
 752
 753 RTE_INIT(dpaa_init_log)
 754 {
 755         dpaa_logtype_bus = rte_log_register("bus.dpaa");
 756         if (dpaa_logtype_bus >= 0)
 757                 rte_log_set_level(dpaa_logtype_bus, RTE_LOG_NOTICE);
 758 }