drivers/bus/fslmc/fslmc_bus.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2016 NXP
   4  *
   5  */
   6
   7 #include <string.h>
   8 #include <dirent.h>
   9 #include <stdbool.h>
  10
  11 #include <rte_log.h>
  12 #include <rte_bus.h>
  13 #include <rte_eal_memconfig.h>
  14 #include <rte_malloc.h>
  15 #include <rte_devargs.h>
  16 #include <rte_memcpy.h>
  17 #include <rte_ethdev_driver.h>
  18
  19 #include <rte_fslmc.h>
  20 #include <fslmc_vfio.h>
  21 #include "fslmc_logs.h"
  22
  23 int dpaa2_logtype_bus;
  24
  25 #define VFIO_IOMMU_GROUP_PATH "/sys/kernel/iommu_groups"
  26 #define FSLMC_BUS_NAME  fslmc
  27
  28 struct rte_fslmc_bus rte_fslmc_bus;
  29 uint8_t dpaa2_virt_mode;
  30
  31 uint32_t
  32 rte_fslmc_get_device_count(enum rte_dpaa2_dev_type device_type)
  33 {
  34         if (device_type > DPAA2_DEVTYPE_MAX)
  35                 return 0;
  36         return rte_fslmc_bus.device_count[device_type];
  37 }
  38
  39 RTE_DEFINE_PER_LCORE(struct dpaa2_portal_dqrr, dpaa2_held_bufs);
  40
  41 static void
  42 cleanup_fslmc_device_list(void)
  43 {
  44         struct rte_dpaa2_device *dev;
  45         struct rte_dpaa2_device *t_dev;
  46
  47         TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, t_dev) {
  48                 TAILQ_REMOVE(&rte_fslmc_bus.device_list, dev, next);
  49                 free(dev);
  50                 dev = NULL;
  51         }
  52 }
  53
  54 static int
  55 compare_dpaa2_devname(struct rte_dpaa2_device *dev1,
  56                       struct rte_dpaa2_device *dev2)
  57 {
  58         int comp;
  59
  60         if (dev1->dev_type > dev2->dev_type) {
  61                 comp = 1;
  62         } else if (dev1->dev_type < dev2->dev_type) {
  63                 comp = -1;
  64         } else {
  65                 /* Check the ID as types match */
  66                 if (dev1->object_id > dev2->object_id)
  67                         comp = 1;
  68                 else if (dev1->object_id < dev2->object_id)
  69                         comp = -1;
  70                 else
  71                         comp = 0; /* Duplicate device name */
  72         }
  73
  74         return comp;
  75 }
  76
  77 static void
  78 insert_in_device_list(struct rte_dpaa2_device *newdev)
  79 {
  80         int comp, inserted = 0;
  81         struct rte_dpaa2_device *dev = NULL;
  82         struct rte_dpaa2_device *tdev = NULL;
  83
  84         TAILQ_FOREACH_SAFE(dev, &rte_fslmc_bus.device_list, next, tdev) {
  85                 comp = compare_dpaa2_devname(newdev, dev);
  86                 if (comp < 0) {
  87                         TAILQ_INSERT_BEFORE(dev, newdev, next);
  88                         inserted = 1;
  89                         break;
  90                 }
  91         }
  92
  93         if (!inserted)
  94                 TAILQ_INSERT_TAIL(&rte_fslmc_bus.device_list, newdev, next);
  95 }
  96
  97 static struct rte_devargs *
  98 fslmc_devargs_lookup(struct rte_dpaa2_device *dev)
  99 {
 100         struct rte_devargs *devargs;
 101         char dev_name[32];
 102
 103         RTE_EAL_DEVARGS_FOREACH("fslmc", devargs) {
 104                 devargs->bus->parse(devargs->name, &dev_name);
 105                 if (strcmp(dev_name, dev->device.name) == 0) {
 106                         DPAA2_BUS_INFO("**Devargs matched %s", dev_name);
 107                         return devargs;
 108                 }
 109         }
 110         return NULL;
 111 }
 112
 113 static void
 114 dump_device_list(void)
 115 {
 116         struct rte_dpaa2_device *dev;
 117         uint32_t global_log_level;
 118         int local_log_level;
 119
 120         /* Only if the log level has been set to Debugging, print list */
 121         global_log_level = rte_log_get_global_level();
 122         local_log_level = rte_log_get_level(dpaa2_logtype_bus);
 123         if (global_log_level == RTE_LOG_DEBUG ||
 124             local_log_level == RTE_LOG_DEBUG) {
 125                 DPAA2_BUS_LOG(DEBUG, "List of devices scanned on bus:");
 126                 TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
 127                         DPAA2_BUS_LOG(DEBUG, "\t\t%s", dev->device.name);
 128                 }
 129         }
 130 }
 131
 132 static int
 133 scan_one_fslmc_device(char *dev_name)
 134 {
 135         char *dup_dev_name, *t_ptr;
 136         struct rte_dpaa2_device *dev;
 137
 138         if (!dev_name)
 139                 return -1;
 140
 141         /* Ignore the Container name itself */
 142         if (!strncmp("dprc", dev_name, 4))
 143                 return 0;
 144
 145         /* Creating a temporary copy to perform cut-parse over string */
 146         dup_dev_name = strdup(dev_name);
 147         if (!dup_dev_name) {
 148                 DPAA2_BUS_ERR("Unable to allocate device name memory");
 149                 return -ENOMEM;
 150         }
 151
 152         /* For all other devices, we allocate rte_dpaa2_device.
 153          * For those devices where there is no driver, probe would release
 154          * the memory associated with the rte_dpaa2_device after necessary
 155          * initialization.
 156          */
 157         dev = calloc(1, sizeof(struct rte_dpaa2_device));
 158         if (!dev) {
 159                 DPAA2_BUS_ERR("Unable to allocate device object");
 160                 free(dup_dev_name);
 161                 return -ENOMEM;
 162         }
 163
 164         /* Parse the device name and ID */
 165         t_ptr = strtok(dup_dev_name, ".");
 166         if (!t_ptr) {
 167                 DPAA2_BUS_ERR("Incorrect device name observed");
 168                 goto cleanup;
 169         }
 170         if (!strncmp("dpni", t_ptr, 4))
 171                 dev->dev_type = DPAA2_ETH;
 172         else if (!strncmp("dpseci", t_ptr, 6))
 173                 dev->dev_type = DPAA2_CRYPTO;
 174         else if (!strncmp("dpcon", t_ptr, 5))
 175                 dev->dev_type = DPAA2_CON;
 176         else if (!strncmp("dpbp", t_ptr, 4))
 177                 dev->dev_type = DPAA2_BPOOL;
 178         else if (!strncmp("dpio", t_ptr, 4))
 179                 dev->dev_type = DPAA2_IO;
 180         else if (!strncmp("dpci", t_ptr, 4))
 181                 dev->dev_type = DPAA2_CI;
 182         else if (!strncmp("dpmcp", t_ptr, 5))
 183                 dev->dev_type = DPAA2_MPORTAL;
 184         else if (!strncmp("dpdmai", t_ptr, 6))
 185                 dev->dev_type = DPAA2_QDMA;
 186         else
 187                 dev->dev_type = DPAA2_UNKNOWN;
 188
 189         /* Update the device found into the device_count table */
 190         rte_fslmc_bus.device_count[dev->dev_type]++;
 191
 192         t_ptr = strtok(NULL, ".");
 193         if (!t_ptr) {
 194                 DPAA2_BUS_ERR("Incorrect device string observed (%s)", t_ptr);
 195                 goto cleanup;
 196         }
 197
 198         sscanf(t_ptr, "%hu", &dev->object_id);
 199         dev->device.name = strdup(dev_name);
 200         if (!dev->device.name) {
 201                 DPAA2_BUS_ERR("Unable to clone device name. Out of memory");
 202                 goto cleanup;
 203         }
 204         dev->device.devargs = fslmc_devargs_lookup(dev);
 205
 206         /* Add device in the fslmc device list */
 207         insert_in_device_list(dev);
 208
 209         /* Don't need the duplicated device filesystem entry anymore */
 210         if (dup_dev_name)
 211                 free(dup_dev_name);
 212
 213         return 0;
 214 cleanup:
 215         if (dup_dev_name)
 216                 free(dup_dev_name);
 217         if (dev)
 218                 free(dev);
 219         return -1;
 220 }
 221
 222 static int
 223 rte_fslmc_parse(const char *name, void *addr)
 224 {
 225         uint16_t dev_id;
 226         char *t_ptr;
 227         char *sep = strchr(name, ':');
 228
 229         if (strncmp(name, RTE_STR(FSLMC_BUS_NAME),
 230                 strlen(RTE_STR(FSLMC_BUS_NAME)))) {
 231                 return -EINVAL;
 232         }
 233
 234         if (!sep) {
 235                 DPAA2_BUS_ERR("Incorrect device name observed");
 236                 return -EINVAL;
 237         }
 238
 239         t_ptr = (char *)(sep + 1);
 240
 241         if (strncmp("dpni", t_ptr, 4) &&
 242             strncmp("dpseci", t_ptr, 6) &&
 243             strncmp("dpcon", t_ptr, 5) &&
 244             strncmp("dpbp", t_ptr, 4) &&
 245             strncmp("dpio", t_ptr, 4) &&
 246             strncmp("dpci", t_ptr, 4) &&
 247             strncmp("dpmcp", t_ptr, 5) &&
 248             strncmp("dpdmai", t_ptr, 6)) {
 249                 DPAA2_BUS_ERR("Unknown or unsupported device");
 250                 return -EINVAL;
 251         }
 252
 253         t_ptr = strchr(name, '.');
 254         if (!t_ptr) {
 255                 DPAA2_BUS_ERR("Incorrect device string observed (%s)", t_ptr);
 256                 return -EINVAL;
 257         }
 258
 259         t_ptr = (char *)(t_ptr + 1);
 260         if (sscanf(t_ptr, "%hu", &dev_id) <= 0) {
 261                 DPAA2_BUS_ERR("Incorrect device string observed (%s)", t_ptr);
 262                 return -EINVAL;
 263         }
 264
 265         if (addr)
 266                 strcpy(addr, (char *)(sep + 1));
 267         return 0;
 268 }
 269
 270 static int
 271 rte_fslmc_scan(void)
 272 {
 273         int ret;
 274         int device_count = 0;
 275         char fslmc_dirpath[PATH_MAX];
 276         DIR *dir;
 277         struct dirent *entry;
 278         static int process_once;
 279         int groupid;
 280
 281         if (process_once) {
 282                 DPAA2_BUS_DEBUG("Fslmc bus already scanned. Not rescanning");
 283                 return 0;
 284         }
 285         process_once = 1;
 286
 287         ret = fslmc_get_container_group(&groupid);
 288         if (ret != 0)
 289                 goto scan_fail;
 290
 291         /* Scan devices on the group */
 292         sprintf(fslmc_dirpath, "%s/%d/devices", VFIO_IOMMU_GROUP_PATH,
 293                 groupid);
 294         dir = opendir(fslmc_dirpath);
 295         if (!dir) {
 296                 DPAA2_BUS_ERR("Unable to open VFIO group directory");
 297                 goto scan_fail;
 298         }
 299
 300         while ((entry = readdir(dir)) != NULL) {
 301                 if (entry->d_name[0] == '.' || entry->d_type != DT_LNK)
 302                         continue;
 303
 304                 ret = scan_one_fslmc_device(entry->d_name);
 305                 if (ret != 0) {
 306                         /* Error in parsing directory - exit gracefully */
 307                         goto scan_fail_cleanup;
 308                 }
 309                 device_count += 1;
 310         }
 311
 312         closedir(dir);
 313
 314         DPAA2_BUS_INFO("FSLMC Bus scan completed");
 315         /* If debugging is enabled, device list is dumped to log output */
 316         dump_device_list();
 317
 318         return 0;
 319
 320 scan_fail_cleanup:
 321         closedir(dir);
 322
 323         /* Remove all devices in the list */
 324         cleanup_fslmc_device_list();
 325 scan_fail:
 326         DPAA2_BUS_DEBUG("FSLMC Bus Not Available. Skipping");
 327         /* Irrespective of failure, scan only return success */
 328         return 0;
 329 }
 330
 331 static int
 332 rte_fslmc_match(struct rte_dpaa2_driver *dpaa2_drv,
 333                 struct rte_dpaa2_device *dpaa2_dev)
 334 {
 335         if (dpaa2_drv->drv_type == dpaa2_dev->dev_type)
 336                 return 0;
 337
 338         return 1;
 339 }
 340
 341 static int
 342 rte_fslmc_probe(void)
 343 {
 344         int ret = 0;
 345         int probe_all;
 346
 347         struct rte_dpaa2_device *dev;
 348         struct rte_dpaa2_driver *drv;
 349
 350         if (TAILQ_EMPTY(&rte_fslmc_bus.device_list))
 351                 return 0;
 352
 353         ret = fslmc_vfio_setup_group();
 354         if (ret) {
 355                 DPAA2_BUS_ERR("Unable to setup VFIO %d", ret);
 356                 return 0;
 357         }
 358
 359         /* Map existing segments as well as, in case of hotpluggable memory,
 360          * install callback handler.
 361          */
 362         ret = rte_fslmc_vfio_dmamap();
 363         if (ret) {
 364                 DPAA2_BUS_ERR("Unable to DMA map existing VAs: (%d)", ret);
 365                 /* Not continuing ahead */
 366                 DPAA2_BUS_ERR("FSLMC VFIO Mapping failed");
 367                 return 0;
 368         }
 369
 370         ret = fslmc_vfio_process_group();
 371         if (ret) {
 372                 DPAA2_BUS_ERR("Unable to setup devices %d", ret);
 373                 return 0;
 374         }
 375
 376         probe_all = rte_fslmc_bus.bus.conf.scan_mode != RTE_BUS_SCAN_WHITELIST;
 377
 378         TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
 379                 TAILQ_FOREACH(drv, &rte_fslmc_bus.driver_list, next) {
 380                         ret = rte_fslmc_match(drv, dev);
 381                         if (ret)
 382                                 continue;
 383
 384                         if (!drv->probe)
 385                                 continue;
 386
 387                         if (dev->device.devargs &&
 388                           dev->device.devargs->policy == RTE_DEV_BLACKLISTED) {
 389                                 DPAA2_BUS_LOG(DEBUG, "%s Blacklisted, skipping",
 390                                               dev->device.name);
 391                                 continue;
 392                         }
 393
 394                         if (probe_all ||
 395                            (dev->device.devargs &&
 396                            dev->device.devargs->policy ==
 397                            RTE_DEV_WHITELISTED)) {
 398                                 ret = drv->probe(drv, dev);
 399                                 if (ret)
 400                                         DPAA2_BUS_ERR("Unable to probe");
 401                         }
 402                         break;
 403                 }
 404         }
 405
 406         if (rte_eal_iova_mode() == RTE_IOVA_VA)
 407                 dpaa2_virt_mode = 1;
 408
 409         return 0;
 410 }
 411
 412 static struct rte_device *
 413 rte_fslmc_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 414                       const void *data)
 415 {
 416         const struct rte_dpaa2_device *dstart;
 417         struct rte_dpaa2_device *dev;
 418
 419         if (start != NULL) {
 420                 dstart = RTE_DEV_TO_FSLMC_CONST(start);
 421                 dev = TAILQ_NEXT(dstart, next);
 422         } else {
 423                 dev = TAILQ_FIRST(&rte_fslmc_bus.device_list);
 424         }
 425         while (dev != NULL) {
 426                 if (cmp(&dev->device, data) == 0)
 427                         return &dev->device;
 428                 dev = TAILQ_NEXT(dev, next);
 429         }
 430
 431         return NULL;
 432 }
 433
 434 /*register a fslmc bus based dpaa2 driver */
 435 void
 436 rte_fslmc_driver_register(struct rte_dpaa2_driver *driver)
 437 {
 438         RTE_VERIFY(driver);
 439
 440         TAILQ_INSERT_TAIL(&rte_fslmc_bus.driver_list, driver, next);
 441         /* Update Bus references */
 442         driver->fslmc_bus = &rte_fslmc_bus;
 443 }
 444
 445 /*un-register a fslmc bus based dpaa2 driver */
 446 void
 447 rte_fslmc_driver_unregister(struct rte_dpaa2_driver *driver)
 448 {
 449         struct rte_fslmc_bus *fslmc_bus;
 450
 451         fslmc_bus = driver->fslmc_bus;
 452
 453         TAILQ_REMOVE(&fslmc_bus->driver_list, driver, next);
 454         /* Update Bus references */
 455         driver->fslmc_bus = NULL;
 456 }
 457
 458 /*
 459  * All device has iova as va
 460  */
 461 static inline int
 462 fslmc_all_device_support_iova(void)
 463 {
 464         int ret = 0;
 465         struct rte_dpaa2_device *dev;
 466         struct rte_dpaa2_driver *drv;
 467
 468         TAILQ_FOREACH(dev, &rte_fslmc_bus.device_list, next) {
 469                 TAILQ_FOREACH(drv, &rte_fslmc_bus.driver_list, next) {
 470                         ret = rte_fslmc_match(drv, dev);
 471                         if (ret)
 472                                 continue;
 473                         /* if the driver is not supporting IOVA */
 474                         if (!(drv->drv_flags & RTE_DPAA2_DRV_IOVA_AS_VA))
 475                                 return 0;
 476                 }
 477         }
 478         return 1;
 479 }
 480
 481 /*
 482  * Get iommu class of DPAA2 devices on the bus.
 483  */
 484 static enum rte_iova_mode
 485 rte_dpaa2_get_iommu_class(void)
 486 {
 487         bool is_vfio_noiommu_enabled = 1;
 488         bool has_iova_va;
 489
 490         if (TAILQ_EMPTY(&rte_fslmc_bus.device_list))
 491                 return RTE_IOVA_DC;
 492
 493         /* check if all devices on the bus support Virtual addressing or not */
 494         has_iova_va = fslmc_all_device_support_iova();
 495
 496 #ifdef VFIO_PRESENT
 497         is_vfio_noiommu_enabled = rte_vfio_noiommu_is_enabled() == true ?
 498                                                 true : false;
 499 #endif
 500
 501         if (has_iova_va && !is_vfio_noiommu_enabled)
 502                 return RTE_IOVA_VA;
 503
 504         return RTE_IOVA_PA;
 505 }
 506
 507 struct rte_fslmc_bus rte_fslmc_bus = {
 508         .bus = {
 509                 .scan = rte_fslmc_scan,
 510                 .probe = rte_fslmc_probe,
 511                 .parse = rte_fslmc_parse,
 512                 .find_device = rte_fslmc_find_device,
 513                 .get_iommu_class = rte_dpaa2_get_iommu_class,
 514         },
 515         .device_list = TAILQ_HEAD_INITIALIZER(rte_fslmc_bus.device_list),
 516         .driver_list = TAILQ_HEAD_INITIALIZER(rte_fslmc_bus.driver_list),
 517         .device_count = {0},
 518 };
 519
 520 RTE_REGISTER_BUS(FSLMC_BUS_NAME, rte_fslmc_bus.bus);
 521
 522 RTE_INIT(fslmc_init_log);
 523 static void
 524 fslmc_init_log(void)
 525 {
 526         /* Bus level logs */
 527         dpaa2_logtype_bus = rte_log_register("bus.fslmc");
 528         if (dpaa2_logtype_bus >= 0)
 529                 rte_log_set_level(dpaa2_logtype_bus, RTE_LOG_NOTICE);
 530 }