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         /* Segregating 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         /* Creating QDMA Device */
 254         for (i = 0; i < RTE_DPAA_QDMA_DEVICES; i++) {
 255                 dev = calloc(1, sizeof(struct rte_dpaa_device));
 256                 if (!dev) {
 257                         DPAA_BUS_LOG(ERR, "Failed to allocate QDMA device");
 258                         ret = -1;
 259                         goto cleanup;
 260                 }
 261
 262                 dev->device_type = FSL_DPAA_QDMA;
 263                 dev->id.dev_id = rte_dpaa_bus.device_count + i;
 264
 265                 memset(dev->name, 0, RTE_ETH_NAME_MAX_LEN);
 266                 sprintf(dev->name, "dpaa_qdma-%d", i+1);
 267                 DPAA_BUS_LOG(INFO, "%s qdma device added", dev->name);
 268                 dev->device.name = dev->name;
 269                 dev->device.devargs = dpaa_devargs_lookup(dev);
 270
 271                 dpaa_add_to_device_list(dev);
 272         }
 273         rte_dpaa_bus.device_count += i;
 274
 275         return 0;
 276
 277 cleanup:
 278         dpaa_clean_device_list();
 279         return ret;
 280 }
 281
 282 static void
 283 dpaa_clean_device_list(void)
 284 {
 285         struct rte_dpaa_device *dev = NULL;
 286         struct rte_dpaa_device *tdev = NULL;
 287
 288         RTE_TAILQ_FOREACH_SAFE(dev, &rte_dpaa_bus.device_list, next, tdev) {
 289                 TAILQ_REMOVE(&rte_dpaa_bus.device_list, dev, next);
 290                 rte_intr_instance_free(dev->intr_handle);
 291                 free(dev);
 292                 dev = NULL;
 293         }
 294 }
 295
 296 int rte_dpaa_portal_init(void *arg)
 297 {
 298         static const struct rte_mbuf_dynfield dpaa_seqn_dynfield_desc = {
 299                 .name = DPAA_SEQN_DYNFIELD_NAME,
 300                 .size = sizeof(dpaa_seqn_t),
 301                 .align = __alignof__(dpaa_seqn_t),
 302         };
 303         unsigned int cpu, lcore = rte_lcore_id();
 304         int ret;
 305
 306         BUS_INIT_FUNC_TRACE();
 307
 308         if ((size_t)arg == 1 || lcore == LCORE_ID_ANY)
 309                 lcore = rte_get_main_lcore();
 310         else
 311                 if (lcore >= RTE_MAX_LCORE)
 312                         return -1;
 313
 314         cpu = rte_lcore_to_cpu_id(lcore);
 315
 316         dpaa_seqn_dynfield_offset =
 317                 rte_mbuf_dynfield_register(&dpaa_seqn_dynfield_desc);
 318         if (dpaa_seqn_dynfield_offset < 0) {
 319                 DPAA_BUS_LOG(ERR, "Failed to register mbuf field for dpaa sequence number\n");
 320                 return -rte_errno;
 321         }
 322
 323         /* Initialise bman thread portals */
 324         ret = bman_thread_init();
 325         if (ret) {
 326                 DPAA_BUS_LOG(ERR, "bman_thread_init failed on core %u"
 327                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 328                 return ret;
 329         }
 330
 331         DPAA_BUS_LOG(DEBUG, "BMAN thread initialized - CPU=%d lcore=%d",
 332                      cpu, lcore);
 333
 334         /* Initialise qman thread portals */
 335         ret = qman_thread_init();
 336         if (ret) {
 337                 DPAA_BUS_LOG(ERR, "qman_thread_init failed on core %u"
 338                             " (lcore=%u) with ret: %d", cpu, lcore, ret);
 339                 bman_thread_finish();
 340                 return ret;
 341         }
 342
 343         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized - CPU=%d lcore=%d",
 344                      cpu, lcore);
 345
 346         DPAA_PER_LCORE_PORTAL = rte_malloc(NULL, sizeof(struct dpaa_portal),
 347                                     RTE_CACHE_LINE_SIZE);
 348         if (!DPAA_PER_LCORE_PORTAL) {
 349                 DPAA_BUS_LOG(ERR, "Unable to allocate memory");
 350                 bman_thread_finish();
 351                 qman_thread_finish();
 352                 return -ENOMEM;
 353         }
 354
 355         DPAA_PER_LCORE_PORTAL->qman_idx = qman_get_portal_index();
 356         DPAA_PER_LCORE_PORTAL->bman_idx = bman_get_portal_index();
 357         DPAA_PER_LCORE_PORTAL->tid = rte_gettid();
 358
 359         ret = pthread_setspecific(dpaa_portal_key,
 360                                   (void *)DPAA_PER_LCORE_PORTAL);
 361         if (ret) {
 362                 DPAA_BUS_LOG(ERR, "pthread_setspecific failed on core %u"
 363                              " (lcore=%u) with ret: %d", cpu, lcore, ret);
 364                 dpaa_portal_finish(NULL);
 365
 366                 return ret;
 367         }
 368
 369         DPAA_BUS_LOG(DEBUG, "QMAN thread initialized");
 370
 371         return 0;
 372 }
 373
 374 int
 375 rte_dpaa_portal_fq_init(void *arg, struct qman_fq *fq)
 376 {
 377         /* Affine above created portal with channel*/
 378         u32 sdqcr;
 379         int ret;
 380
 381         if (unlikely(!DPAA_PER_LCORE_PORTAL)) {
 382                 ret = rte_dpaa_portal_init(arg);
 383                 if (ret < 0) {
 384                         DPAA_BUS_LOG(ERR, "portal initialization failure");
 385                         return ret;
 386                 }
 387         }
 388
 389         /* Initialise qman specific portals */
 390         ret = fsl_qman_fq_portal_init(fq->qp);
 391         if (ret) {
 392                 DPAA_BUS_LOG(ERR, "Unable to init fq portal");
 393                 return -1;
 394         }
 395
 396         sdqcr = QM_SDQCR_CHANNELS_POOL_CONV(fq->ch_id);
 397         qman_static_dequeue_add(sdqcr, fq->qp);
 398
 399         return 0;
 400 }
 401
 402 int rte_dpaa_portal_fq_close(struct qman_fq *fq)
 403 {
 404         return fsl_qman_fq_portal_destroy(fq->qp);
 405 }
 406
 407 void
 408 dpaa_portal_finish(void *arg)
 409 {
 410         struct dpaa_portal *dpaa_io_portal = (struct dpaa_portal *)arg;
 411
 412         if (!dpaa_io_portal) {
 413                 DPAA_BUS_LOG(DEBUG, "Portal already cleaned");
 414                 return;
 415         }
 416
 417         bman_thread_finish();
 418         qman_thread_finish();
 419
 420         pthread_setspecific(dpaa_portal_key, NULL);
 421
 422         rte_free(dpaa_io_portal);
 423         dpaa_io_portal = NULL;
 424         DPAA_PER_LCORE_PORTAL = NULL;
 425 }
 426
 427 static int
 428 rte_dpaa_bus_parse(const char *name, void *out)
 429 {
 430         unsigned int i, j;
 431         size_t delta;
 432         size_t max_name_len;
 433
 434         /* There are two ways of passing device name, with and without
 435          * separator. "dpaa_bus:fm1-mac3" with separator, and "fm1-mac3"
 436          * without separator. Both need to be handled.
 437          * It is also possible that "name=fm1-mac3" is passed along.
 438          */
 439         DPAA_BUS_DEBUG("Parse device name (%s)", name);
 440
 441         delta = 0;
 442         if (strncmp(name, "dpaa_bus:", 9) == 0) {
 443                 delta = 9;
 444         } else if (strncmp(name, "name=", 5) == 0) {
 445                 delta = 5;
 446         }
 447
 448         if (strncmp("dpaa_sec", &name[delta], 8) == 0) {
 449                 if (sscanf(&name[delta], "dpaa_sec-%u", &i) != 1 ||
 450                                 i < 1 || i > 4)
 451                         return -EINVAL;
 452                 max_name_len = sizeof("dpaa_sec-.") - 1;
 453         } else {
 454                 if (sscanf(&name[delta], "fm%u-mac%u", &i, &j) != 2 ||
 455                                 i >= 2 || j >= 16)
 456                         return -EINVAL;
 457
 458                 max_name_len = sizeof("fm.-mac..") - 1;
 459         }
 460
 461         if (out != NULL) {
 462                 char *out_name = out;
 463
 464                 /* Do not check for truncation, either name ends with
 465                  * '\0' or the device name is followed by parameters and there
 466                  * will be a ',' instead. Not copying past this comma is not an
 467                  * error.
 468                  */
 469                 strlcpy(out_name, &name[delta], max_name_len + 1);
 470
 471                 /* Second digit of mac%u could instead be ','. */
 472                 if ((strlen(out_name) == max_name_len) &&
 473                     out_name[max_name_len] == ',')
 474                         out_name[max_name_len] = '\0';
 475         }
 476
 477         return 0;
 478 }
 479
 480 #define DPAA_DEV_PATH1 "/sys/devices/platform/soc/soc:fsl,dpaa"
 481 #define DPAA_DEV_PATH2 "/sys/devices/platform/fsl,dpaa"
 482
 483 static int
 484 rte_dpaa_bus_scan(void)
 485 {
 486         int ret;
 487
 488         BUS_INIT_FUNC_TRACE();
 489
 490         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 491             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 492                 RTE_LOG(DEBUG, EAL, "DPAA Bus not present. Skipping.\n");
 493                 return 0;
 494         }
 495
 496         if (rte_dpaa_bus.detected)
 497                 return 0;
 498
 499         rte_dpaa_bus.detected = 1;
 500
 501         /* create the key, supplying a function that'll be invoked
 502          * when a portal affined thread will be deleted.
 503          */
 504         ret = pthread_key_create(&dpaa_portal_key, dpaa_portal_finish);
 505         if (ret) {
 506                 DPAA_BUS_LOG(DEBUG, "Unable to create pthread key. (%d)", ret);
 507                 dpaa_clean_device_list();
 508                 return ret;
 509         }
 510
 511         return 0;
 512 }
 513
 514 /* register a dpaa bus based dpaa driver */
 515 void
 516 rte_dpaa_driver_register(struct rte_dpaa_driver *driver)
 517 {
 518         RTE_VERIFY(driver);
 519
 520         BUS_INIT_FUNC_TRACE();
 521
 522         TAILQ_INSERT_TAIL(&rte_dpaa_bus.driver_list, driver, next);
 523         /* Update Bus references */
 524         driver->dpaa_bus = &rte_dpaa_bus;
 525 }
 526
 527 /* un-register a dpaa bus based dpaa driver */
 528 void
 529 rte_dpaa_driver_unregister(struct rte_dpaa_driver *driver)
 530 {
 531         struct rte_dpaa_bus *dpaa_bus;
 532
 533         BUS_INIT_FUNC_TRACE();
 534
 535         dpaa_bus = driver->dpaa_bus;
 536
 537         TAILQ_REMOVE(&dpaa_bus->driver_list, driver, next);
 538         /* Update Bus references */
 539         driver->dpaa_bus = NULL;
 540 }
 541
 542 static int
 543 rte_dpaa_device_match(struct rte_dpaa_driver *drv,
 544                       struct rte_dpaa_device *dev)
 545 {
 546         if (!drv || !dev) {
 547                 DPAA_BUS_DEBUG("Invalid drv or dev received.");
 548                 return -1;
 549         }
 550
 551         if (drv->drv_type == dev->device_type)
 552                 return 0;
 553
 554         return -1;
 555 }
 556
 557 static int
 558 rte_dpaa_bus_dev_build(void)
 559 {
 560         int ret;
 561
 562         /* Load the device-tree driver */
 563         ret = of_init();
 564         if (ret) {
 565                 DPAA_BUS_LOG(ERR, "of_init failed with ret: %d", ret);
 566                 return -1;
 567         }
 568
 569         /* Get the interface configurations from device-tree */
 570         dpaa_netcfg = netcfg_acquire();
 571         if (!dpaa_netcfg) {
 572                 DPAA_BUS_LOG(ERR,
 573                         "netcfg failed: /dev/fsl_usdpaa device not available");
 574                 DPAA_BUS_WARN(
 575                         "Check if you are using USDPAA based device tree");
 576                 return -EINVAL;
 577         }
 578
 579         RTE_LOG(NOTICE, EAL, "DPAA Bus Detected\n");
 580
 581         if (!dpaa_netcfg->num_ethports) {
 582                 DPAA_BUS_LOG(INFO, "NO DPDK mapped net interfaces available");
 583                 /* This is not an error */
 584         }
 585
 586 #ifdef RTE_LIBRTE_DPAA_DEBUG_DRIVER
 587         dump_netcfg(dpaa_netcfg);
 588 #endif
 589
 590         DPAA_BUS_LOG(DEBUG, "Number of ethernet devices = %d",
 591                      dpaa_netcfg->num_ethports);
 592         ret = dpaa_create_device_list();
 593         if (ret) {
 594                 DPAA_BUS_LOG(ERR, "Unable to create device list. (%d)", ret);
 595                 return ret;
 596         }
 597         return 0;
 598 }
 599
 600 static int rte_dpaa_setup_intr(struct rte_intr_handle *intr_handle)
 601 {
 602         int fd;
 603
 604         fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
 605         if (fd < 0) {
 606                 DPAA_BUS_ERR("Cannot set up eventfd, error %i (%s)",
 607                              errno, strerror(errno));
 608                 return errno;
 609         }
 610
 611         if (rte_intr_fd_set(intr_handle, fd))
 612                 return rte_errno;
 613
 614         if (rte_intr_type_set(intr_handle, RTE_INTR_HANDLE_EXT))
 615                 return rte_errno;
 616
 617         return 0;
 618 }
 619
 620 static int
 621 rte_dpaa_bus_probe(void)
 622 {
 623         int ret = -1;
 624         struct rte_dpaa_device *dev;
 625         struct rte_dpaa_driver *drv;
 626         FILE *svr_file = NULL;
 627         unsigned int svr_ver;
 628         int probe_all = rte_dpaa_bus.bus.conf.scan_mode != RTE_BUS_SCAN_ALLOWLIST;
 629         static int process_once;
 630
 631         /* If DPAA bus is not present nothing needs to be done */
 632         if (!rte_dpaa_bus.detected)
 633                 return 0;
 634
 635         /* Device list creation is only done once */
 636         if (!process_once) {
 637                 rte_dpaa_bus_dev_build();
 638                 /* One time load of Qman/Bman drivers */
 639                 ret = qman_global_init();
 640                 if (ret) {
 641                         DPAA_BUS_ERR("QMAN initialization failed: %d",
 642                                      ret);
 643                         return ret;
 644                 }
 645                 ret = bman_global_init();
 646                 if (ret) {
 647                         DPAA_BUS_ERR("BMAN initialization failed: %d",
 648                                      ret);
 649                         return ret;
 650                 }
 651         }
 652         process_once = 1;
 653
 654         /* If no device present on DPAA bus nothing needs to be done */
 655         if (TAILQ_EMPTY(&rte_dpaa_bus.device_list))
 656                 return 0;
 657
 658         svr_file = fopen(DPAA_SOC_ID_FILE, "r");
 659         if (svr_file) {
 660                 if (fscanf(svr_file, "svr:%x", &svr_ver) > 0)
 661                         dpaa_svr_family = svr_ver & SVR_MASK;
 662                 fclose(svr_file);
 663         }
 664
 665         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 666                 if (dev->device_type == FSL_DPAA_ETH) {
 667                         ret = rte_dpaa_setup_intr(dev->intr_handle);
 668                         if (ret)
 669                                 DPAA_BUS_ERR("Error setting up interrupt.\n");
 670                 }
 671         }
 672
 673         /* And initialize the PA->VA translation table */
 674         dpaax_iova_table_populate();
 675
 676         /* For each registered driver, and device, call the driver->probe */
 677         TAILQ_FOREACH(dev, &rte_dpaa_bus.device_list, next) {
 678                 TAILQ_FOREACH(drv, &rte_dpaa_bus.driver_list, next) {
 679                         ret = rte_dpaa_device_match(drv, dev);
 680                         if (ret)
 681                                 continue;
 682
 683                         if (rte_dev_is_probed(&dev->device))
 684                                 continue;
 685
 686                         if (!drv->probe ||
 687                             (dev->device.devargs &&
 688                              dev->device.devargs->policy == RTE_DEV_BLOCKED))
 689                                 continue;
 690
 691                         if (probe_all ||
 692                             (dev->device.devargs &&
 693                              dev->device.devargs->policy == RTE_DEV_ALLOWED)) {
 694                                 ret = drv->probe(drv, dev);
 695                                 if (ret) {
 696                                         DPAA_BUS_ERR("unable to probe:%s",
 697                                                      dev->name);
 698                                 } else {
 699                                         dev->driver = drv;
 700                                         dev->device.driver = &drv->driver;
 701                                 }
 702                         }
 703                         break;
 704                 }
 705         }
 706
 707         /* Register DPAA mempool ops only if any DPAA device has
 708          * been detected.
 709          */
 710         rte_mbuf_set_platform_mempool_ops(DPAA_MEMPOOL_OPS_NAME);
 711
 712         return 0;
 713 }
 714
 715 static struct rte_device *
 716 rte_dpaa_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 717                      const void *data)
 718 {
 719         struct rte_dpaa_device *dev;
 720         const struct rte_dpaa_device *dstart;
 721
 722         /* find_device is called with 'data' as an opaque object - just call
 723          * cmp with this and each device object on bus.
 724          */
 725
 726         if (start != NULL) {
 727                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 728                 dev = TAILQ_NEXT(dstart, next);
 729         } else {
 730                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 731         }
 732
 733         while (dev != NULL) {
 734                 if (cmp(&dev->device, data) == 0) {
 735                         DPAA_BUS_DEBUG("Found dev=(%s)\n", dev->device.name);
 736                         return &dev->device;
 737                 }
 738                 dev = TAILQ_NEXT(dev, next);
 739         }
 740
 741         DPAA_BUS_DEBUG("Unable to find any device\n");
 742         return NULL;
 743 }
 744
 745 /*
 746  * Get iommu class of DPAA2 devices on the bus.
 747  */
 748 static enum rte_iova_mode
 749 rte_dpaa_get_iommu_class(void)
 750 {
 751         if ((access(DPAA_DEV_PATH1, F_OK) != 0) &&
 752             (access(DPAA_DEV_PATH2, F_OK) != 0)) {
 753                 return RTE_IOVA_DC;
 754         }
 755         return RTE_IOVA_PA;
 756 }
 757
 758 static int
 759 dpaa_bus_plug(struct rte_device *dev __rte_unused)
 760 {
 761         /* No operation is performed while plugging the device */
 762         return 0;
 763 }
 764
 765 static int
 766 dpaa_bus_unplug(struct rte_device *dev __rte_unused)
 767 {
 768         /* No operation is performed while unplugging the device */
 769         return 0;
 770 }
 771
 772 static void *
 773 dpaa_bus_dev_iterate(const void *start, const char *str,
 774                      const struct rte_dev_iterator *it __rte_unused)
 775 {
 776         const struct rte_dpaa_device *dstart;
 777         struct rte_dpaa_device *dev;
 778         char *dup, *dev_name = NULL;
 779
 780         if (str == NULL) {
 781                 DPAA_BUS_DEBUG("No device string");
 782                 return NULL;
 783         }
 784
 785         /* Expectation is that device would be name=device_name */
 786         if (strncmp(str, "name=", 5) != 0) {
 787                 DPAA_BUS_DEBUG("Invalid device string (%s)\n", str);
 788                 return NULL;
 789         }
 790
 791         /* Now that name=device_name format is available, split */
 792         dup = strdup(str);
 793         dev_name = dup + strlen("name=");
 794
 795         if (start != NULL) {
 796                 dstart = RTE_DEV_TO_DPAA_CONST(start);
 797                 dev = TAILQ_NEXT(dstart, next);
 798         } else {
 799                 dev = TAILQ_FIRST(&rte_dpaa_bus.device_list);
 800         }
 801
 802         while (dev != NULL) {
 803                 if (strcmp(dev->device.name, dev_name) == 0) {
 804                         free(dup);
 805                         return &dev->device;
 806                 }
 807                 dev = TAILQ_NEXT(dev, next);
 808         }
 809
 810         free(dup);
 811         return NULL;
 812 }
 813
 814 static struct rte_dpaa_bus rte_dpaa_bus = {
 815         .bus = {
 816                 .scan = rte_dpaa_bus_scan,
 817                 .probe = rte_dpaa_bus_probe,
 818                 .parse = rte_dpaa_bus_parse,
 819                 .find_device = rte_dpaa_find_device,
 820                 .get_iommu_class = rte_dpaa_get_iommu_class,
 821                 .plug = dpaa_bus_plug,
 822                 .unplug = dpaa_bus_unplug,
 823                 .dev_iterate = dpaa_bus_dev_iterate,
 824         },
 825         .device_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.device_list),
 826         .driver_list = TAILQ_HEAD_INITIALIZER(rte_dpaa_bus.driver_list),
 827         .device_count = 0,
 828 };
 829
 830 RTE_REGISTER_BUS(FSL_DPAA_BUS_NAME, rte_dpaa_bus.bus);
 831 RTE_LOG_REGISTER_DEFAULT(dpaa_logtype_bus, NOTICE);