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                 /* Allocate interrupt handle instance */
 176                 dev->intr_handle =
 177                         rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_PRIVATE);
 178                 if (dev->intr_handle == NULL) {
 179                         DPAA_BUS_LOG(ERR, "Failed to allocate intr handle");
 180                         ret = -ENOMEM;
 181                         goto cleanup;
 182                 }
 183
 184                 cfg = &dpaa_netcfg->port_cfg[i];
 185                 fman_intf = cfg->fman_if;
 186
 187                 /* Device identifiers */
 188                 dev->id.fman_id = fman_intf->fman_idx + 1;
 189                 dev->id.mac_id = fman_intf->mac_idx;
 190                 dev->device_type = FSL_DPAA_ETH;
 191                 dev->id.dev_id = i;
 192
 193                 /* Create device name */
 194                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 195                 sprintf(dev->name, "fm%d-mac%d", (fman_intf->fman_idx + 1),
 196                         fman_intf->mac_idx);
 197                 DPAA_BUS_LOG(INFO, "%s netdev added", dev->name);
 198                 dev->device.name = dev->name;
 199                 dev->device.devargs = dpaa_devargs_lookup(dev);
 200
 201                 dpaa_add_to_device_list(dev);
 202         }
 203
 204         rte_dpaa_bus.device_count = i;
 205
 206         /* Unlike case of ETH, RTE_LIBRTE_DPAA_MAX_CRYPTODEV SEC devices are
 207          * constantly created only if "sec" property is found in the device
 208          * tree. Logically there is no limit for number of devices (QI
 209          * interfaces) that can be created.
 210          */
 211
 212         if (dpaa_sec_available()) {
 213                 DPAA_BUS_LOG(INFO, "DPAA SEC devices are not available");
 214                 return 0;
 215         }
 216
 217         /* Creating SEC Devices */
 218         for (i = 0; i < RTE_LIBRTE_DPAA_MAX_CRYPTODEV; i++) {
 219                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 220                 if (!dev) {
 221                         DPAA_BUS_LOG(ERR, "Failed to allocate SEC devices");
 222                         ret = -1;
 223                         goto cleanup;
 224                 }
 225
 226                 /* Allocate interrupt handle instance */
 227                 dev->intr_handle =
 228                         rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_PRIVATE);
 229                 if (dev->intr_handle == NULL) {
 230                         DPAA_BUS_LOG(ERR, "Failed to allocate intr handle");
 231                         ret = -ENOMEM;
 232                         goto cleanup;
 233                 }
 234
 235                 dev->device_type = FSL_DPAA_CRYPTO;
 236                 dev->id.dev_id = rte_dpaa_bus.device_count + i;
 237
 238                 /* Even though RTE_CRYPTODEV_NAME_MAX_LEN is valid length of
 239                  * crypto PMD, using RTE_ETH_NAME_MAX_LEN as that is the size
 240                  * allocated for dev->name/
 241                  */
 242                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 243                 sprintf(dev->name, "dpaa_sec-%d", i+1);
 244                 DPAA_BUS_LOG(INFO, "%s cryptodev added", dev->name);
 245                 dev->device.name = dev->name;
 246                 dev->device.devargs = dpaa_devargs_lookup(dev);
 247
 248                 dpaa_add_to_device_list(dev);
 249         }
 250
 251         rte_dpaa_bus.device_count += i;
 252
 253         return 0;
 254
 255 cleanup:
 256         dpaa_clean_device_list();
 257         return ret;
 258 }
 259
 260 static void
 261 dpaa_clean_device_list(void)
 262 {
 263         struct rte_dpaa_device *dev = NULL;
 264         struct rte_dpaa_device *tdev = NULL;
 265
 266         RTE_TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 267                 TAILQ_REMOVE(&rte_dpaa_bus.device_list, dev, next);
 268                 rte_intr_instance_free(dev->intr_handle);
 269                 free(dev);
 270                 dev = NULL;
 271         }
 272 }
 273
 274 int rte_dpaa_portal_init(void *arg)
 275 {
 276         static const struct rte_mbuf_dynfield dpaa_seqn_dynfield_desc = {
 277                 .name = DPAA_SEQN_DYNFIELD_NAME,
 278                 .size = sizeof(dpaa_seqn_t),
 279                 .align = __alignof__(dpaa_seqn_t),
 280         };
 281         unsigned int cpu, lcore = rte_lcore_id();
 282         int ret;
 283
 284         BUS_INIT_FUNC_TRACE();
 285
 286         if ((size_t)arg == 1 || lcore == LCORE_ID_ANY)
 287                 lcore = rte_get_main_lcore();
 288         else
 289                 if (lcore >= RTE_MAX_LCORE)
 290                         return -1;
 291
 292         cpu = rte_lcore_to_cpu_id(lcore);
 293
 294         dpaa_seqn_dynfield_offset =
 295                 rte_mbuf_dynfield_register(&dpaa_seqn_dynfield_desc);
 296         if (dpaa_seqn_dynfield_offset < 0) {
 297                 DPAA_BUS_LOG(ERR, "Failed to register mbuf field for dpaa sequence number\n");
 298                 return -rte_errno;
 299         }
 300
 301         /* Initialise bman thread portals */
 302         ret = bman_thread_init();
 303         if (ret) {
 304                 DPAA_BUS_LOG(ERR, "bman_thread_init failed on core %u"
 305                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 306                 return ret;
 307         }
 308
 309         DPAA_BUS_LOG(DEBUG, "BMAN thread initialized - CPU=%d lcore=%d",
 310                      cpu, lcore);
 311
 312         /* Initialise qman thread portals */
 313         ret = qman_thread_init();
 314         if (ret) {
 315                 DPAA_BUS_LOG(ERR, "qman_thread_init failed on core %u"
 316                             " (lcore=%u) with ret: %d", cpu, lcore, ret);
 317                 bman_thread_finish();
 318                 return ret;
 319         }
 320
 321         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized - CPU=%d lcore=%d",
 322                      cpu, lcore);
 323
 324         DPAA_PER_LCORE_PORTAL = rte_malloc(NULL, sizeof(struct dpaa_portal),
 325                                     RTE_CACHE_LINE_SIZE);
 326         if (!DPAA_PER_LCORE_PORTAL) {
 327                 DPAA_BUS_LOG(ERR, "Unable to allocate memory");
 328                 bman_thread_finish();
 329                 qman_thread_finish();
 330                 return -ENOMEM;
 331         }
 332
 333         DPAA_PER_LCORE_PORTAL->qman_idx = qman_get_portal_index();
 334         DPAA_PER_LCORE_PORTAL->bman_idx = bman_get_portal_index();
 335         DPAA_PER_LCORE_PORTAL->tid = rte_gettid();
 336
 337         ret = pthread_setspecific(dpaa_portal_key,
 338                                   (void *)DPAA_PER_LCORE_PORTAL);
 339         if (ret) {
 340                 DPAA_BUS_LOG(ERR, "pthread_setspecific failed on core %u"
 341                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 342                 dpaa_portal_finish(NULL);
 343
 344                 return ret;
 345         }
 346
 347         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized");
 348
 349         return 0;
 350 }
 351
 352 int
 353 rte_dpaa_portal_fq_init(void *arg, struct qman_fq *fq)
 354 {
 355         /* Affine above created portal with channel*/
 356         u32 sdqcr;
 357         int ret;
 358
 359         if (unlikely(!DPAA_PER_LCORE_PORTAL)) {
 360                 ret = rte_dpaa_portal_init(arg);
 361                 if (ret < 0) {
 362                         DPAA_BUS_LOG(ERR, "portal initialization failure");
 363                         return ret;
 364                 }
 365         }
 366
 367         /* Initialise qman specific portals */
 368         ret = fsl_qman_fq_portal_init(fq->qp);
 369         if (ret) {
 370                 DPAA_BUS_LOG(ERR, "Unable to init fq portal");
 371                 return -1;
 372         }
 373
 374         sdqcr = QM_SDQCR_CHANNELS_POOL_CONV(fq->ch_id);
 375         qman_static_dequeue_add(sdqcr, fq->qp);
 376
 377         return 0;
 378 }
 379
 380 int rte_dpaa_portal_fq_close(struct qman_fq *fq)
 381 {
 382         return fsl_qman_fq_portal_destroy(fq->qp);
 383 }
 384
 385 void
 386 dpaa_portal_finish(void *arg)
 387 {
 388         struct dpaa_portal *dpaa_io_portal = (struct dpaa_portal *)arg;
 389
 390         if (!dpaa_io_portal) {
 391                 DPAA_BUS_LOG(DEBUG, "Portal already cleaned");
 392                 return;
 393         }
 394
 395         bman_thread_finish();
 396         qman_thread_finish();
 397
 398         pthread_setspecific(dpaa_portal_key, NULL);
 399
 400         rte_free(dpaa_io_portal);
 401         dpaa_io_portal = NULL;
 402         DPAA_PER_LCORE_PORTAL = NULL;
 403 }
 404
 405 static int
 406 rte_dpaa_bus_parse(const char *name, void *out)
 407 {
 408         unsigned int i, j;
 409         size_t delta;
 410
 411         /* There are two ways of passing device name, with and without
 412          * separator. "dpaa_bus:fm1-mac3" with separator, and "fm1-mac3"
 413          * without separator. Both need to be handled.
 414          * It is also possible that "name=fm1-mac3" is passed along.
 415          */
 416         DPAA_BUS_DEBUG("Parse device name (%s)", name);
 417
 418         delta = 0;
 419         if (strncmp(name, "dpaa_bus:", 9) == 0) {
 420                 delta = 9;
 421         } else if (strncmp(name, "name=", 5) == 0) {
 422                 delta = 5;
 423         }
 424
 425         if (sscanf(&name[delta], "fm%u-mac%u", &i, &j) != 2 ||
 426             i >= 2 || j >= 16) {
 427                 return -EINVAL;
 428         }
 429
 430         if (out != NULL) {
 431                 char *out_name = out;
 432                 const size_t max_name_len = sizeof("fm.-mac..") - 1;
 433
 434                 /* Do not check for truncation, either name ends with
 435                  * '\0' or the device name is followed by parameters and there
 436                  * will be a ',' instead. Not copying past this comma is not an
 437                  * error.
 438                  */
 439                 strlcpy(out_name, &name[delta], max_name_len + 1);
 440
 441                 /* Second digit of mac%u could instead be ','. */
 442                 if ((strlen(out_name) == max_name_len) &&
 443                     out_name[max_name_len] == ',')
 444                         out_name[max_name_len] = '\0';
 445         }
 446
 447         return 0;
 448 }
 449
 450 #define DPAA_DEV_PATH1 "/sys/devices/platform/soc/soc:fsl,dpaa"
 451 #define DPAA_DEV_PATH2 "/sys/devices/platform/fsl,dpaa"
 452
 453 static int
 454 rte_dpaa_bus_scan(void)
 455 {
 456         int ret;
 457
 458         BUS_INIT_FUNC_TRACE();
 459
 460         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 461             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 462                 RTE_LOG(DEBUG, EAL, "DPAA Bus not present. Skipping.\n");
 463                 return 0;
 464         }
 465
 466         if (rte_dpaa_bus.detected)
 467                 return 0;
 468
 469         rte_dpaa_bus.detected = 1;
 470
 471         /* create the key, supplying a function that'll be invoked
 472          * when a portal affined thread will be deleted.
 473          */
 474         ret = pthread_key_create(&dpaa_portal_key, dpaa_portal_finish);
 475         if (ret) {
 476                 DPAA_BUS_LOG(DEBUG, "Unable to create pthread key. (%d)", ret);
 477                 dpaa_clean_device_list();
 478                 return ret;
 479         }
 480
 481         return 0;
 482 }
 483
 484 /* register a dpaa bus based dpaa driver */
 485 void
 486 rte_dpaa_driver_register(struct rte_dpaa_driver *driver)
 487 {
 488         RTE_VERIFY(driver);
 489
 490         BUS_INIT_FUNC_TRACE();
 491
 492         TAILQ_INSERT_TAIL(&rte_dpaa_bus.driver_list, driver, next);
 493         /* Update Bus references */
 494         driver->dpaa_bus = &rte_dpaa_bus;
 495 }
 496
 497 /* un-register a dpaa bus based dpaa driver */
 498 void
 499 rte_dpaa_driver_unregister(struct rte_dpaa_driver *driver)
 500 {
 501         struct rte_dpaa_bus *dpaa_bus;
 502
 503         BUS_INIT_FUNC_TRACE();
 504
 505         dpaa_bus = driver->dpaa_bus;
 506
 507         TAILQ_REMOVE(&dpaa_bus->driver_list, driver, next);
 508         /* Update Bus references */
 509         driver->dpaa_bus = NULL;
 510 }
 511
 512 static int
 513 rte_dpaa_device_match(struct rte_dpaa_driver *drv,
 514                       struct rte_dpaa_device *dev)
 515 {
 516         if (!drv || !dev) {
 517                 DPAA_BUS_DEBUG("Invalid drv or dev received.");
 518                 return -1;
 519         }
 520
 521         if (drv->drv_type == dev->device_type)
 522                 return 0;
 523
 524         return -1;
 525 }
 526
 527 static int
 528 rte_dpaa_bus_dev_build(void)
 529 {
 530         int ret;
 531
 532         /* Load the device-tree driver */
 533         ret = of_init();
 534         if (ret) {
 535                 DPAA_BUS_LOG(ERR, "of_init failed with ret: %d", ret);
 536                 return -1;
 537         }
 538
 539         /* Get the interface configurations from device-tree */
 540         dpaa_netcfg = netcfg_acquire();
 541         if (!dpaa_netcfg) {
 542                 DPAA_BUS_LOG(ERR,
 543                         "netcfg failed: /dev/fsl_usdpaa device not available");
 544                 DPAA_BUS_WARN(
 545                         "Check if you are using USDPAA based device tree");
 546                 return -EINVAL;
 547         }
 548
 549         RTE_LOG(NOTICE, EAL, "DPAA Bus Detected\n");
 550
 551         if (!dpaa_netcfg->num_ethports) {
 552                 DPAA_BUS_LOG(INFO, "NO DPDK mapped net interfaces available");
 553                 /* This is not an error */
 554         }
 555
 556 #ifdef RTE_LIBRTE_DPAA_DEBUG_DRIVER
 557         dump_netcfg(dpaa_netcfg);
 558 #endif
 559
 560         DPAA_BUS_LOG(DEBUG, "Number of ethernet devices = %d",
 561                      dpaa_netcfg->num_ethports);
 562         ret = dpaa_create_device_list();
 563         if (ret) {
 564                 DPAA_BUS_LOG(ERR, "Unable to create device list. (%d)", ret);
 565                 return ret;
 566         }
 567         return 0;
 568 }
 569
 570 static int rte_dpaa_setup_intr(struct rte_intr_handle *intr_handle)
 571 {
 572         int fd;
 573
 574         fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
 575         if (fd < 0) {
 576                 DPAA_BUS_ERR("Cannot set up eventfd, error %i (%s)",
 577                              errno, strerror(errno));
 578                 return errno;
 579         }
 580
 581         if (rte_intr_fd_set(intr_handle, fd))
 582                 return rte_errno;
 583
 584         if (rte_intr_type_set(intr_handle, RTE_INTR_HANDLE_EXT))
 585                 return rte_errno;
 586
 587         return 0;
 588 }
 589
 590 static int
 591 rte_dpaa_bus_probe(void)
 592 {
 593         int ret = -1;
 594         struct rte_dpaa_device *dev;
 595         struct rte_dpaa_driver *drv;
 596         FILE *svr_file = NULL;
 597         unsigned int svr_ver;
 598         int probe_all = rte_dpaa_bus.bus.conf.scan_mode != RTE_BUS_SCAN_ALLOWLIST;
 599         static int process_once;
 600
 601         /* If DPAA bus is not present nothing needs to be done */
 602         if (!rte_dpaa_bus.detected)
 603                 return 0;
 604
 605         /* Device list creation is only done once */
 606         if (!process_once) {
 607                 rte_dpaa_bus_dev_build();
 608                 /* One time load of Qman/Bman drivers */
 609                 ret = qman_global_init();
 610                 if (ret) {
 611                         DPAA_BUS_ERR("QMAN initialization failed: %d",
 612                                      ret);
 613                         return ret;
 614                 }
 615                 ret = bman_global_init();
 616                 if (ret) {
 617                         DPAA_BUS_ERR("BMAN initialization failed: %d",
 618                                      ret);
 619                         return ret;
 620                 }
 621         }
 622         process_once = 1;
 623
 624         /* If no device present on DPAA bus nothing needs to be done */
 625         if (TAILQ_EMPTY(&rte_dpaa_bus.device_list))
 626                 return 0;
 627
 628         svr_file = fopen(DPAA_SOC_ID_FILE, "r");
 629         if (svr_file) {
 630                 if (fscanf(svr_file, "svr:%x", &svr_ver) > 0)
 631                         dpaa_svr_family = svr_ver & SVR_MASK;
 632                 fclose(svr_file);
 633         }
 634
 635         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 636                 if (dev->device_type == FSL_DPAA_ETH) {
 637                         ret = rte_dpaa_setup_intr(dev->intr_handle);
 638                         if (ret)
 639                                 DPAA_BUS_ERR("Error setting up interrupt.\n");
 640                 }
 641         }
 642
 643         /* And initialize the PA->VA translation table */
 644         dpaax_iova_table_populate();
 645
 646         /* For each registered driver, and device, call the driver->probe */
 647         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 648                 TAILQ_FOREACH(drv, &rte_dpaa_bus.driver_list, next) {
 649                         ret = rte_dpaa_device_match(drv, dev);
 650                         if (ret)
 651                                 continue;
 652
 653                         if (rte_dev_is_probed(&dev->device))
 654                                 continue;
 655
 656                         if (!drv->probe ||
 657                             (dev->device.devargs &&
 658                              dev->device.devargs->policy == RTE_DEV_BLOCKED))
 659                                 continue;
 660
 661                         if (probe_all ||
 662                             (dev->device.devargs &&
 663                              dev->device.devargs->policy == RTE_DEV_ALLOWED)) {
 664                                 ret = drv->probe(drv, dev);
 665                                 if (ret) {
 666                                         DPAA_BUS_ERR("unable to probe:%s",
 667                                                      dev->name);
 668                                 } else {
 669                                         dev->driver = drv;
 670                                         dev->device.driver = &drv->driver;
 671                                 }
 672                         }
 673                         break;
 674                 }
 675         }
 676
 677         /* Register DPAA mempool ops only if any DPAA device has
 678          * been detected.
 679          */
 680         rte_mbuf_set_platform_mempool_ops(DPAA_MEMPOOL_OPS_NAME);
 681
 682         return 0;
 683 }
 684
 685 static struct rte_device *
 686 rte_dpaa_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 687                      const void *data)
 688 {
 689         struct rte_dpaa_device *dev;
 690         const struct rte_dpaa_device *dstart;
 691
 692         /* find_device is called with 'data' as an opaque object - just call
 693          * cmp with this and each device object on bus.
 694          */
 695
 696         if (start != NULL) {
 697                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 698                 dev = TAILQ_NEXT(dstart, next);
 699         } else {
 700                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 701         }
 702
 703         while (dev != NULL) {
 704                 if (cmp(&dev->device, data) == 0) {
 705                         DPAA_BUS_DEBUG("Found dev=(%s)\n", dev->device.name);
 706                         return &dev->device;
 707                 }
 708                 dev = TAILQ_NEXT(dev, next);
 709         }
 710
 711         DPAA_BUS_DEBUG("Unable to find any device\n");
 712         return NULL;
 713 }
 714
 715 /*
 716  * Get iommu class of DPAA2 devices on the bus.
 717  */
 718 static enum rte_iova_mode
 719 rte_dpaa_get_iommu_class(void)
 720 {
 721         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 722             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 723                 return RTE_IOVA_DC;
 724         }
 725         return RTE_IOVA_PA;
 726 }
 727
 728 static int
 729 dpaa_bus_plug(struct rte_device *dev __rte_unused)
 730 {
 731         /* No operation is performed while plugging the device */
 732         return 0;
 733 }
 734
 735 static int
 736 dpaa_bus_unplug(struct rte_device *dev __rte_unused)
 737 {
 738         /* No operation is performed while unplugging the device */
 739         return 0;
 740 }
 741
 742 static void *
 743 dpaa_bus_dev_iterate(const void *start, const char *str,
 744                      const struct rte_dev_iterator *it __rte_unused)
 745 {
 746         const struct rte_dpaa_device *dstart;
 747         struct rte_dpaa_device *dev;
 748         char *dup, *dev_name = NULL;
 749
 750         if (str == NULL) {
 751                 DPAA_BUS_DEBUG("No device string");
 752                 return NULL;
 753         }
 754
 755         /* Expectation is that device would be name=device_name */
 756         if (strncmp(str, "name=", 5) != 0) {
 757                 DPAA_BUS_DEBUG("Invalid device string (%s)\n", str);
 758                 return NULL;
 759         }
 760
 761         /* Now that name=device_name format is available, split */
 762         dup = strdup(str);
 763         dev_name = dup + strlen("name=");
 764
 765         if (start != NULL) {
 766                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 767                 dev = TAILQ_NEXT(dstart, next);
 768         } else {
 769                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 770         }
 771
 772         while (dev != NULL) {
 773                 if (strcmp(dev->device.name, dev_name) == 0) {
 774                         free(dup);
 775                         return &dev->device;
 776                 }
 777                 dev = TAILQ_NEXT(dev, next);
 778         }
 779
 780         free(dup);
 781         return NULL;
 782 }
 783
 784 static struct rte_dpaa_bus rte_dpaa_bus = {
 785         .bus = {
 786                 .scan = rte_dpaa_bus_scan,
 787                 .probe = rte_dpaa_bus_probe,
 788                 .parse = rte_dpaa_bus_parse,
 789                 .find_device = rte_dpaa_find_device,
 790                 .get_iommu_class = rte_dpaa_get_iommu_class,
 791                 .plug = dpaa_bus_plug,
 792                 .unplug = dpaa_bus_unplug,
 793                 .dev_iterate = dpaa_bus_dev_iterate,
 794         },
 795         .device_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.device_list),
 796         .driver_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.driver_list),
 797         .device_count = 0,
 798 };
 799
 800 RTE_REGISTER_BUS(FSL_DPAA_BUS_NAME, rte_dpaa_bus.bus);
 801 RTE_LOG_REGISTER_DEFAULT(dpaa_logtype_bus, NOTICE);