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