drivers/bus/dpaa/dpaa_bus.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2017-2020 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/eventfd.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 <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 #include <rte_mbuf_dyn.h>
  35
  36 #include <dpaa_of.h>
  37 #include <rte_dpaa_bus.h>
  38 #include <rte_dpaa_logs.h>
  39 #include <dpaax_iova_table.h>
  40
  41 #include <fsl_usd.h>
  42 #include <fsl_qman.h>
  43 #include <fsl_bman.h>
  44 #include <netcfg.h>
  45
  46 static struct rte_dpaa_bus rte_dpaa_bus;
  47 struct netcfg_info *dpaa_netcfg;
  48
  49 /* define a variable to hold the portal_key, once created.*/
  50 static pthread_key_t dpaa_portal_key;
  51
  52 unsigned int dpaa_svr_family;
  53
  54 #define FSL_DPAA_BUS_NAME       dpaa_bus
  55
  56 RTE_DEFINE_PER_LCORE(struct dpaa_portal *, dpaa_io);
  57
  58 #define DPAA_SEQN_DYNFIELD_NAME "dpaa_seqn_dynfield"
  59 int dpaa_seqn_dynfield_offset = -1;
  60
  61 struct fm_eth_port_cfg *
  62 dpaa_get_eth_port_cfg(int dev_id)
  63 {
  64         return &dpaa_netcfg->port_cfg[dev_id];
  65 }
  66
  67 static int
  68 compare_dpaa_devices(struct rte_dpaa_device *dev1,
  69                      struct rte_dpaa_device *dev2)
  70 {
  71         int comp = 0;
  72
  73         /* Segragating ETH from SEC devices */
  74         if (dev1->device_type > dev2->device_type)
  75                 comp = 1;
  76         else if (dev1->device_type < dev2->device_type)
  77                 comp = -1;
  78         else
  79                 comp = 0;
  80
  81         if ((comp != 0) || (dev1->device_type != FSL_DPAA_ETH))
  82                 return comp;
  83
  84         if (dev1->id.fman_id > dev2->id.fman_id) {
  85                 comp = 1;
  86         } else if (dev1->id.fman_id < dev2->id.fman_id) {
  87                 comp = -1;
  88         } else {
  89                 /* FMAN ids match, check for mac_id */
  90                 if (dev1->id.mac_id > dev2->id.mac_id)
  91                         comp = 1;
  92                 else if (dev1->id.mac_id < dev2->id.mac_id)
  93                         comp = -1;
  94                 else
  95                         comp = 0;
  96         }
  97
  98         return comp;
  99 }
 100
 101 static inline void
 102 dpaa_add_to_device_list(struct rte_dpaa_device *newdev)
 103 {
 104         int comp, inserted = 0;
 105         struct rte_dpaa_device *dev = NULL;
 106         struct rte_dpaa_device *tdev = NULL;
 107
 108         RTE_TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 109                 comp = compare_dpaa_devices(newdev, dev);
 110                 if (comp < 0) {
 111                         TAILQ_INSERT_BEFORE(dev, newdev, next);
 112                         inserted = 1;
 113                         break;
 114                 }
 115         }
 116
 117         if (!inserted)
 118                 TAILQ_INSERT_TAIL(&rte_dpaa_bus.device_list, newdev, next);
 119 }
 120
 121 /*
 122  * Reads the SEC device from DTS
 123  * Returns -1 if SEC devices not available, 0 otherwise
 124  */
 125 static inline int
 126 dpaa_sec_available(void)
 127 {
 128         const struct device_node *caam_node;
 129
 130         for_each_compatible_node(caam_node, NULL, "fsl,sec-v4.0") {
 131                 return 0;
 132         }
 133
 134         return -1;
 135 }
 136
 137 static void dpaa_clean_device_list(void);
 138
 139 static struct rte_devargs *
 140 dpaa_devargs_lookup(struct rte_dpaa_device *dev)
 141 {
 142         struct rte_devargs *devargs;
 143         char dev_name[32];
 144
 145         RTE_EAL_DEVARGS_FOREACH("dpaa_bus", devargs) {
 146                 devargs->bus->parse(devargs->name, &dev_name);
 147                 if (strcmp(dev_name, dev->device.name) == 0) {
 148                         DPAA_BUS_INFO("**Devargs matched %s", dev_name);
 149                         return devargs;
 150                 }
 151         }
 152         return NULL;
 153 }
 154
 155 static int
 156 dpaa_create_device_list(void)
 157 {
 158         int i;
 159         int ret;
 160         struct rte_dpaa_device *dev;
 161         struct fm_eth_port_cfg *cfg;
 162         struct fman_if *fman_intf;
 163
 164         /* Creating Ethernet Devices */
 165         for (i = 0; i < dpaa_netcfg->num_ethports; i++) {
 166                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 167                 if (!dev) {
 168                         DPAA_BUS_LOG(ERR, "Failed to allocate ETH devices");
 169                         ret = -ENOMEM;
 170                         goto cleanup;
 171                 }
 172
 173                 dev->device.bus = &rte_dpaa_bus.bus;
 174
 175                 cfg = &dpaa_netcfg->port_cfg[i];
 176                 fman_intf = cfg->fman_if;
 177
 178                 /* Device identifiers */
 179                 dev->id.fman_id = fman_intf->fman_idx + 1;
 180                 dev->id.mac_id = fman_intf->mac_idx;
 181                 dev->device_type = FSL_DPAA_ETH;
 182                 dev->id.dev_id = i;
 183
 184                 /* Create device name */
 185                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 186                 sprintf(dev->name, "fm%d-mac%d", (fman_intf->fman_idx + 1),
 187                         fman_intf->mac_idx);
 188                 DPAA_BUS_LOG(INFO, "%s netdev added", dev->name);
 189                 dev->device.name = dev->name;
 190                 dev->device.devargs = dpaa_devargs_lookup(dev);
 191
 192                 dpaa_add_to_device_list(dev);
 193         }
 194
 195         rte_dpaa_bus.device_count = i;
 196
 197         /* Unlike case of ETH, RTE_LIBRTE_DPAA_MAX_CRYPTODEV SEC devices are
 198          * constantly created only if "sec" property is found in the device
 199          * tree. Logically there is no limit for number of devices (QI
 200          * interfaces) that can be created.
 201          */
 202
 203         if (dpaa_sec_available()) {
 204                 DPAA_BUS_LOG(INFO, "DPAA SEC devices are not available");
 205                 return 0;
 206         }
 207
 208         /* Creating SEC Devices */
 209         for (i = 0; i < RTE_LIBRTE_DPAA_MAX_CRYPTODEV; i++) {
 210                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 211                 if (!dev) {
 212                         DPAA_BUS_LOG(ERR, "Failed to allocate SEC devices");
 213                         ret = -1;
 214                         goto cleanup;
 215                 }
 216
 217                 dev->device_type = FSL_DPAA_CRYPTO;
 218                 dev->id.dev_id = rte_dpaa_bus.device_count + i;
 219
 220                 /* Even though RTE_CRYPTODEV_NAME_MAX_LEN is valid length of
 221                  * crypto PMD, using RTE_ETH_NAME_MAX_LEN as that is the size
 222                  * allocated for dev->name/
 223                  */
 224                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 225                 sprintf(dev->name, "dpaa_sec-%d", i+1);
 226                 DPAA_BUS_LOG(INFO, "%s cryptodev added", dev->name);
 227                 dev->device.name = dev->name;
 228                 dev->device.devargs = dpaa_devargs_lookup(dev);
 229
 230                 dpaa_add_to_device_list(dev);
 231         }
 232
 233         rte_dpaa_bus.device_count += i;
 234
 235         return 0;
 236
 237 cleanup:
 238         dpaa_clean_device_list();
 239         return ret;
 240 }
 241
 242 static void
 243 dpaa_clean_device_list(void)
 244 {
 245         struct rte_dpaa_device *dev = NULL;
 246         struct rte_dpaa_device *tdev = NULL;
 247
 248         RTE_TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 249                 TAILQ_REMOVE(&rte_dpaa_bus.device_list, dev, next);
 250                 free(dev);
 251                 dev = NULL;
 252         }
 253 }
 254
 255 int rte_dpaa_portal_init(void *arg)
 256 {
 257         static const struct rte_mbuf_dynfield dpaa_seqn_dynfield_desc = {
 258                 .name = DPAA_SEQN_DYNFIELD_NAME,
 259                 .size = sizeof(dpaa_seqn_t),
 260                 .align = __alignof__(dpaa_seqn_t),
 261         };
 262         unsigned int cpu, lcore = rte_lcore_id();
 263         int ret;
 264
 265         BUS_INIT_FUNC_TRACE();
 266
 267         if ((size_t)arg == 1 || lcore == LCORE_ID_ANY)
 268                 lcore = rte_get_main_lcore();
 269         else
 270                 if (lcore >= RTE_MAX_LCORE)
 271                         return -1;
 272
 273         cpu = rte_lcore_to_cpu_id(lcore);
 274
 275         dpaa_seqn_dynfield_offset =
 276                 rte_mbuf_dynfield_register(&dpaa_seqn_dynfield_desc);
 277         if (dpaa_seqn_dynfield_offset < 0) {
 278                 DPAA_BUS_LOG(ERR, "Failed to register mbuf field for dpaa sequence number\n");
 279                 return -rte_errno;
 280         }
 281
 282         /* Initialise bman thread portals */
 283         ret = bman_thread_init();
 284         if (ret) {
 285                 DPAA_BUS_LOG(ERR, "bman_thread_init failed on core %u"
 286                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 287                 return ret;
 288         }
 289
 290         DPAA_BUS_LOG(DEBUG, "BMAN thread initialized - CPU=%d lcore=%d",
 291                      cpu, lcore);
 292
 293         /* Initialise qman thread portals */
 294         ret = qman_thread_init();
 295         if (ret) {
 296                 DPAA_BUS_LOG(ERR, "qman_thread_init failed on core %u"
 297                             " (lcore=%u) with ret: %d", cpu, lcore, ret);
 298                 bman_thread_finish();
 299                 return ret;
 300         }
 301
 302         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized - CPU=%d lcore=%d",
 303                      cpu, lcore);
 304
 305         DPAA_PER_LCORE_PORTAL = rte_malloc(NULL, sizeof(struct dpaa_portal),
 306                                     RTE_CACHE_LINE_SIZE);
 307         if (!DPAA_PER_LCORE_PORTAL) {
 308                 DPAA_BUS_LOG(ERR, "Unable to allocate memory");
 309                 bman_thread_finish();
 310                 qman_thread_finish();
 311                 return -ENOMEM;
 312         }
 313
 314         DPAA_PER_LCORE_PORTAL->qman_idx = qman_get_portal_index();
 315         DPAA_PER_LCORE_PORTAL->bman_idx = bman_get_portal_index();
 316         DPAA_PER_LCORE_PORTAL->tid = rte_gettid();
 317
 318         ret = pthread_setspecific(dpaa_portal_key,
 319                                   (void *)DPAA_PER_LCORE_PORTAL);
 320         if (ret) {
 321                 DPAA_BUS_LOG(ERR, "pthread_setspecific failed on core %u"
 322                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 323                 dpaa_portal_finish(NULL);
 324
 325                 return ret;
 326         }
 327
 328         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized");
 329
 330         return 0;
 331 }
 332
 333 int
 334 rte_dpaa_portal_fq_init(void *arg, struct qman_fq *fq)
 335 {
 336         /* Affine above created portal with channel*/
 337         u32 sdqcr;
 338         int ret;
 339
 340         if (unlikely(!DPAA_PER_LCORE_PORTAL)) {
 341                 ret = rte_dpaa_portal_init(arg);
 342                 if (ret < 0) {
 343                         DPAA_BUS_LOG(ERR, "portal initialization failure");
 344                         return ret;
 345                 }
 346         }
 347
 348         /* Initialise qman specific portals */
 349         ret = fsl_qman_fq_portal_init(fq->qp);
 350         if (ret) {
 351                 DPAA_BUS_LOG(ERR, "Unable to init fq portal");
 352                 return -1;
 353         }
 354
 355         sdqcr = QM_SDQCR_CHANNELS_POOL_CONV(fq->ch_id);
 356         qman_static_dequeue_add(sdqcr, fq->qp);
 357
 358         return 0;
 359 }
 360
 361 int rte_dpaa_portal_fq_close(struct qman_fq *fq)
 362 {
 363         return fsl_qman_fq_portal_destroy(fq->qp);
 364 }
 365
 366 void
 367 dpaa_portal_finish(void *arg)
 368 {
 369         struct dpaa_portal *dpaa_io_portal = (struct dpaa_portal *)arg;
 370
 371         if (!dpaa_io_portal) {
 372                 DPAA_BUS_LOG(DEBUG, "Portal already cleaned");
 373                 return;
 374         }
 375
 376         bman_thread_finish();
 377         qman_thread_finish();
 378
 379         pthread_setspecific(dpaa_portal_key, NULL);
 380
 381         rte_free(dpaa_io_portal);
 382         dpaa_io_portal = NULL;
 383         DPAA_PER_LCORE_PORTAL = NULL;
 384 }
 385
 386 static int
 387 rte_dpaa_bus_parse(const char *name, void *out)
 388 {
 389         unsigned int i, j;
 390         size_t delta;
 391
 392         /* There are two ways of passing device name, with and without
 393          * separator. "dpaa_bus:fm1-mac3" with separator, and "fm1-mac3"
 394          * without separator. Both need to be handled.
 395          * It is also possible that "name=fm1-mac3" is passed along.
 396          */
 397         DPAA_BUS_DEBUG("Parse device name (%s)", name);
 398
 399         delta = 0;
 400         if (strncmp(name, "dpaa_bus:", 9) == 0) {
 401                 delta = 9;
 402         } else if (strncmp(name, "name=", 5) == 0) {
 403                 delta = 5;
 404         }
 405
 406         if (sscanf(&name[delta], "fm%u-mac%u", &i, &j) != 2 ||
 407             i >= 2 || j >= 16) {
 408                 return -EINVAL;
 409         }
 410
 411         if (out != NULL) {
 412                 char *out_name = out;
 413                 const size_t max_name_len = sizeof("fm.-mac..") - 1;
 414
 415                 /* Do not check for truncation, either name ends with
 416                  * '\0' or the device name is followed by parameters and there
 417                  * will be a ',' instead. Not copying past this comma is not an
 418                  * error.
 419                  */
 420                 strlcpy(out_name, &name[delta], max_name_len + 1);
 421
 422                 /* Second digit of mac%u could instead be ','. */
 423                 if ((strlen(out_name) == max_name_len) &&
 424                     out_name[max_name_len] == ',')
 425                         out_name[max_name_len] = '\0';
 426         }
 427
 428         return 0;
 429 }
 430
 431 #define DPAA_DEV_PATH1 "/sys/devices/platform/soc/soc:fsl,dpaa"
 432 #define DPAA_DEV_PATH2 "/sys/devices/platform/fsl,dpaa"
 433
 434 static int
 435 rte_dpaa_bus_scan(void)
 436 {
 437         int ret;
 438
 439         BUS_INIT_FUNC_TRACE();
 440
 441         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 442             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 443                 RTE_LOG(DEBUG, EAL, "DPAA Bus not present. Skipping.\n");
 444                 return 0;
 445         }
 446
 447         if (rte_dpaa_bus.detected)
 448                 return 0;
 449
 450         rte_dpaa_bus.detected = 1;
 451
 452         /* create the key, supplying a function that'll be invoked
 453          * when a portal affined thread will be deleted.
 454          */
 455         ret = pthread_key_create(&dpaa_portal_key, dpaa_portal_finish);
 456         if (ret) {
 457                 DPAA_BUS_LOG(DEBUG, "Unable to create pthread key. (%d)", ret);
 458                 dpaa_clean_device_list();
 459                 return ret;
 460         }
 461
 462         return 0;
 463 }
 464
 465 /* register a dpaa bus based dpaa driver */
 466 void
 467 rte_dpaa_driver_register(struct rte_dpaa_driver *driver)
 468 {
 469         RTE_VERIFY(driver);
 470
 471         BUS_INIT_FUNC_TRACE();
 472
 473         TAILQ_INSERT_TAIL(&rte_dpaa_bus.driver_list, driver, next);
 474         /* Update Bus references */
 475         driver->dpaa_bus = &rte_dpaa_bus;
 476 }
 477
 478 /* un-register a dpaa bus based dpaa driver */
 479 void
 480 rte_dpaa_driver_unregister(struct rte_dpaa_driver *driver)
 481 {
 482         struct rte_dpaa_bus *dpaa_bus;
 483
 484         BUS_INIT_FUNC_TRACE();
 485
 486         dpaa_bus = driver->dpaa_bus;
 487
 488         TAILQ_REMOVE(&dpaa_bus->driver_list, driver, next);
 489         /* Update Bus references */
 490         driver->dpaa_bus = NULL;
 491 }
 492
 493 static int
 494 rte_dpaa_device_match(struct rte_dpaa_driver *drv,
 495                       struct rte_dpaa_device *dev)
 496 {
 497         if (!drv || !dev) {
 498                 DPAA_BUS_DEBUG("Invalid drv or dev received.");
 499                 return -1;
 500         }
 501
 502         if (drv->drv_type == dev->device_type)
 503                 return 0;
 504
 505         return -1;
 506 }
 507
 508 static int
 509 rte_dpaa_bus_dev_build(void)
 510 {
 511         int ret;
 512
 513         /* Load the device-tree driver */
 514         ret = of_init();
 515         if (ret) {
 516                 DPAA_BUS_LOG(ERR, "of_init failed with ret: %d", ret);
 517                 return -1;
 518         }
 519
 520         /* Get the interface configurations from device-tree */
 521         dpaa_netcfg = netcfg_acquire();
 522         if (!dpaa_netcfg) {
 523                 DPAA_BUS_LOG(ERR,
 524                         "netcfg failed: /dev/fsl_usdpaa device not available");
 525                 DPAA_BUS_WARN(
 526                         "Check if you are using USDPAA based device tree");
 527                 return -EINVAL;
 528         }
 529
 530         RTE_LOG(NOTICE, EAL, "DPAA Bus Detected\n");
 531
 532         if (!dpaa_netcfg->num_ethports) {
 533                 DPAA_BUS_LOG(INFO, "NO DPDK mapped net interfaces available");
 534                 /* This is not an error */
 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 rte_dpaa_setup_intr(struct rte_intr_handle *intr_handle)
 552 {
 553         int fd;
 554
 555         fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
 556         if (fd < 0) {
 557                 DPAA_BUS_ERR("Cannot set up eventfd, error %i (%s)",
 558                              errno, strerror(errno));
 559                 return errno;
 560         }
 561
 562         intr_handle->fd = fd;
 563         intr_handle->type = RTE_INTR_HANDLE_EXT;
 564
 565         return 0;
 566 }
 567
 568 static int
 569 rte_dpaa_bus_probe(void)
 570 {
 571         int ret = -1;
 572         struct rte_dpaa_device *dev;
 573         struct rte_dpaa_driver *drv;
 574         FILE *svr_file = NULL;
 575         unsigned int svr_ver;
 576         int probe_all = rte_dpaa_bus.bus.conf.scan_mode != RTE_BUS_SCAN_ALLOWLIST;
 577         static int process_once;
 578
 579         /* If DPAA bus is not present nothing needs to be done */
 580         if (!rte_dpaa_bus.detected)
 581                 return 0;
 582
 583         /* Device list creation is only done once */
 584         if (!process_once) {
 585                 rte_dpaa_bus_dev_build();
 586                 /* One time load of Qman/Bman drivers */
 587                 ret = qman_global_init();
 588                 if (ret) {
 589                         DPAA_BUS_ERR("QMAN initialization failed: %d",
 590                                      ret);
 591                         return ret;
 592                 }
 593                 ret = bman_global_init();
 594                 if (ret) {
 595                         DPAA_BUS_ERR("BMAN initialization failed: %d",
 596                                      ret);
 597                         return ret;
 598                 }
 599         }
 600         process_once = 1;
 601
 602         /* If no device present on DPAA bus nothing needs to be done */
 603         if (TAILQ_EMPTY(&rte_dpaa_bus.device_list))
 604                 return 0;
 605
 606         svr_file = fopen(DPAA_SOC_ID_FILE, "r");
 607         if (svr_file) {
 608                 if (fscanf(svr_file, "svr:%x", &svr_ver) > 0)
 609                         dpaa_svr_family = svr_ver & SVR_MASK;
 610                 fclose(svr_file);
 611         }
 612
 613         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 614                 if (dev->device_type == FSL_DPAA_ETH) {
 615                         ret = rte_dpaa_setup_intr(&dev->intr_handle);
 616                         if (ret)
 617                                 DPAA_BUS_ERR("Error setting up interrupt.\n");
 618                 }
 619         }
 620
 621         /* And initialize the PA->VA translation table */
 622         dpaax_iova_table_populate();
 623
 624         /* For each registered driver, and device, call the driver->probe */
 625         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 626                 TAILQ_FOREACH(drv, &rte_dpaa_bus.driver_list, next) {
 627                         ret = rte_dpaa_device_match(drv, dev);
 628                         if (ret)
 629                                 continue;
 630
 631                         if (rte_dev_is_probed(&dev->device))
 632                                 continue;
 633
 634                         if (!drv->probe ||
 635                             (dev->device.devargs &&
 636                              dev->device.devargs->policy == RTE_DEV_BLOCKED))
 637                                 continue;
 638
 639                         if (probe_all ||
 640                             (dev->device.devargs &&
 641                              dev->device.devargs->policy == RTE_DEV_ALLOWED)) {
 642                                 ret = drv->probe(drv, dev);
 643                                 if (ret) {
 644                                         DPAA_BUS_ERR("unable to probe:%s",
 645                                                      dev->name);
 646                                 } else {
 647                                         dev->driver = drv;
 648                                         dev->device.driver = &drv->driver;
 649                                 }
 650                         }
 651                         break;
 652                 }
 653         }
 654
 655         /* Register DPAA mempool ops only if any DPAA device has
 656          * been detected.
 657          */
 658         rte_mbuf_set_platform_mempool_ops(DPAA_MEMPOOL_OPS_NAME);
 659
 660         return 0;
 661 }
 662
 663 static struct rte_device *
 664 rte_dpaa_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 665                      const void *data)
 666 {
 667         struct rte_dpaa_device *dev;
 668         const struct rte_dpaa_device *dstart;
 669
 670         /* find_device is called with 'data' as an opaque object - just call
 671          * cmp with this and each device object on bus.
 672          */
 673
 674         if (start != NULL) {
 675                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 676                 dev = TAILQ_NEXT(dstart, next);
 677         } else {
 678                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 679         }
 680
 681         while (dev != NULL) {
 682                 if (cmp(&dev->device, data) == 0) {
 683                         DPAA_BUS_DEBUG("Found dev=(%s)\n", dev->device.name);
 684                         return &dev->device;
 685                 }
 686                 dev = TAILQ_NEXT(dev, next);
 687         }
 688
 689         DPAA_BUS_DEBUG("Unable to find any device\n");
 690         return NULL;
 691 }
 692
 693 /*
 694  * Get iommu class of DPAA2 devices on the bus.
 695  */
 696 static enum rte_iova_mode
 697 rte_dpaa_get_iommu_class(void)
 698 {
 699         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 700             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 701                 return RTE_IOVA_DC;
 702         }
 703         return RTE_IOVA_PA;
 704 }
 705
 706 static int
 707 dpaa_bus_plug(struct rte_device *dev __rte_unused)
 708 {
 709         /* No operation is performed while plugging the device */
 710         return 0;
 711 }
 712
 713 static int
 714 dpaa_bus_unplug(struct rte_device *dev __rte_unused)
 715 {
 716         /* No operation is performed while unplugging the device */
 717         return 0;
 718 }
 719
 720 static void *
 721 dpaa_bus_dev_iterate(const void *start, const char *str,
 722                      const struct rte_dev_iterator *it __rte_unused)
 723 {
 724         const struct rte_dpaa_device *dstart;
 725         struct rte_dpaa_device *dev;
 726         char *dup, *dev_name = NULL;
 727
 728         if (str == NULL) {
 729                 DPAA_BUS_DEBUG("No device string");
 730                 return NULL;
 731         }
 732
 733         /* Expectation is that device would be name=device_name */
 734         if (strncmp(str, "name=", 5) != 0) {
 735                 DPAA_BUS_DEBUG("Invalid device string (%s)\n", str);
 736                 return NULL;
 737         }
 738
 739         /* Now that name=device_name format is available, split */
 740         dup = strdup(str);
 741         dev_name = dup + strlen("name=");
 742
 743         if (start != NULL) {
 744                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 745                 dev = TAILQ_NEXT(dstart, next);
 746         } else {
 747                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 748         }
 749
 750         while (dev != NULL) {
 751                 if (strcmp(dev->device.name, dev_name) == 0) {
 752                         free(dup);
 753                         return &dev->device;
 754                 }
 755                 dev = TAILQ_NEXT(dev, next);
 756         }
 757
 758         free(dup);
 759         return NULL;
 760 }
 761
 762 static struct rte_dpaa_bus rte_dpaa_bus = {
 763         .bus = {
 764                 .scan = rte_dpaa_bus_scan,
 765                 .probe = rte_dpaa_bus_probe,
 766                 .parse = rte_dpaa_bus_parse,
 767                 .find_device = rte_dpaa_find_device,
 768                 .get_iommu_class = rte_dpaa_get_iommu_class,
 769                 .plug = dpaa_bus_plug,
 770                 .unplug = dpaa_bus_unplug,
 771                 .dev_iterate = dpaa_bus_dev_iterate,
 772         },
 773         .device_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.device_list),
 774         .driver_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.driver_list),
 775         .device_count = 0,
 776 };
 777
 778 RTE_REGISTER_BUS(FSL_DPAA_BUS_NAME, rte_dpaa_bus.bus);
 779 RTE_LOG_REGISTER_DEFAULT(dpaa_logtype_bus, NOTICE);