test/dm/bus.c

   1 /*
   2  * Copyright (c) 2014 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <dm/device-internal.h>
  10 #include <dm/test.h>
  11 #include <dm/uclass-internal.h>
  12 #include <dm/util.h>
  13 #include <test/ut.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 struct dm_test_parent_platdata {
  18         int count;
  19         int bind_flag;
  20         int uclass_bind_flag;
  21 };
  22
  23 enum {
  24         FLAG_CHILD_PROBED       = 10,
  25         FLAG_CHILD_REMOVED      = -7,
  26 };
  27
  28 static struct dm_test_state *test_state;
  29
  30 static int testbus_drv_probe(struct udevice *dev)
  31 {
  32         return dm_scan_fdt_dev(dev);
  33 }
  34
  35 static int testbus_child_post_bind(struct udevice *dev)
  36 {
  37         struct dm_test_parent_platdata *plat;
  38
  39         plat = dev_get_parent_platdata(dev);
  40         plat->bind_flag = 1;
  41         plat->uclass_bind_flag = 2;
  42
  43         return 0;
  44 }
  45
  46 static int testbus_child_pre_probe(struct udevice *dev)
  47 {
  48         struct dm_test_parent_data *parent_data = dev_get_parent_priv(dev);
  49
  50         parent_data->flag += FLAG_CHILD_PROBED;
  51
  52         return 0;
  53 }
  54
  55 static int testbus_child_pre_probe_uclass(struct udevice *dev)
  56 {
  57         struct dm_test_priv *priv = dev_get_priv(dev);
  58
  59         priv->uclass_flag++;
  60
  61         return 0;
  62 }
  63
  64 static int testbus_child_post_remove(struct udevice *dev)
  65 {
  66         struct dm_test_parent_data *parent_data = dev_get_parent_priv(dev);
  67         struct dm_test_state *dms = test_state;
  68
  69         parent_data->flag += FLAG_CHILD_REMOVED;
  70         if (dms)
  71                 dms->removed = dev;
  72
  73         return 0;
  74 }
  75
  76 static const struct udevice_id testbus_ids[] = {
  77         {
  78                 .compatible = "denx,u-boot-test-bus",
  79                 .data = DM_TEST_TYPE_FIRST },
  80         { }
  81 };
  82
  83 U_BOOT_DRIVER(testbus_drv) = {
  84         .name   = "testbus_drv",
  85         .of_match       = testbus_ids,
  86         .id     = UCLASS_TEST_BUS,
  87         .probe  = testbus_drv_probe,
  88         .child_post_bind = testbus_child_post_bind,
  89         .priv_auto_alloc_size = sizeof(struct dm_test_priv),
  90         .platdata_auto_alloc_size = sizeof(struct dm_test_pdata),
  91         .per_child_auto_alloc_size = sizeof(struct dm_test_parent_data),
  92         .per_child_platdata_auto_alloc_size =
  93                         sizeof(struct dm_test_parent_platdata),
  94         .child_pre_probe = testbus_child_pre_probe,
  95         .child_post_remove = testbus_child_post_remove,
  96 };
  97
  98 UCLASS_DRIVER(testbus) = {
  99         .name           = "testbus",
 100         .id             = UCLASS_TEST_BUS,
 101         .flags          = DM_UC_FLAG_SEQ_ALIAS,
 102         .child_pre_probe = testbus_child_pre_probe_uclass,
 103 };
 104
 105 /* Test that we can probe for children */
 106 static int dm_test_bus_children(struct unit_test_state *uts)
 107 {
 108         int num_devices = 6;
 109         struct udevice *bus;
 110         struct uclass *uc;
 111
 112         ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
 113         ut_asserteq(num_devices, list_count_items(&uc->dev_head));
 114
 115         /* Probe the bus, which should yield 3 more devices */
 116         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 117         num_devices += 3;
 118
 119         ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
 120         ut_asserteq(num_devices, list_count_items(&uc->dev_head));
 121
 122         ut_assert(!dm_check_devices(uts, num_devices));
 123
 124         return 0;
 125 }
 126 DM_TEST(dm_test_bus_children, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 127
 128 /* Test our functions for accessing children */
 129 static int dm_test_bus_children_funcs(struct unit_test_state *uts)
 130 {
 131         const void *blob = gd->fdt_blob;
 132         struct udevice *bus, *dev;
 133         int node;
 134
 135         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 136
 137         /* device_get_child() */
 138         ut_assertok(device_get_child(bus, 0, &dev));
 139         ut_asserteq(-ENODEV, device_get_child(bus, 4, &dev));
 140         ut_assertok(device_get_child_by_seq(bus, 5, &dev));
 141         ut_assert(dev->flags & DM_FLAG_ACTIVATED);
 142         ut_asserteq_str("c-test@5", dev->name);
 143
 144         /* Device with sequence number 0 should be accessible */
 145         ut_asserteq(-ENODEV, device_find_child_by_seq(bus, -1, true, &dev));
 146         ut_assertok(device_find_child_by_seq(bus, 0, true, &dev));
 147         ut_assert(!(dev->flags & DM_FLAG_ACTIVATED));
 148         ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 0, false, &dev));
 149         ut_assertok(device_get_child_by_seq(bus, 0, &dev));
 150         ut_assert(dev->flags & DM_FLAG_ACTIVATED);
 151
 152         /* There is no device with sequence number 2 */
 153         ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 2, false, &dev));
 154         ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 2, true, &dev));
 155         ut_asserteq(-ENODEV, device_get_child_by_seq(bus, 2, &dev));
 156
 157         /* Looking for something that is not a child */
 158         node = fdt_path_offset(blob, "/junk");
 159         ut_asserteq(-ENODEV, device_find_child_by_of_offset(bus, node, &dev));
 160         node = fdt_path_offset(blob, "/d-test");
 161         ut_asserteq(-ENODEV, device_find_child_by_of_offset(bus, node, &dev));
 162
 163         /* Find a valid child */
 164         node = fdt_path_offset(blob, "/some-bus/c-test@1");
 165         ut_assertok(device_find_child_by_of_offset(bus, node, &dev));
 166         ut_assert(!(dev->flags & DM_FLAG_ACTIVATED));
 167         ut_assertok(device_get_child_by_of_offset(bus, node, &dev));
 168         ut_assert(dev->flags & DM_FLAG_ACTIVATED);
 169
 170         return 0;
 171 }
 172 DM_TEST(dm_test_bus_children_funcs, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 173
 174 /* Test that we can iterate through children */
 175 static int dm_test_bus_children_iterators(struct unit_test_state *uts)
 176 {
 177         struct udevice *bus, *dev, *child;
 178
 179         /* Walk through the children one by one */
 180         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 181         ut_assertok(device_find_first_child(bus, &dev));
 182         ut_asserteq_str("c-test@5", dev->name);
 183         ut_assertok(device_find_next_child(&dev));
 184         ut_asserteq_str("c-test@0", dev->name);
 185         ut_assertok(device_find_next_child(&dev));
 186         ut_asserteq_str("c-test@1", dev->name);
 187         ut_assertok(device_find_next_child(&dev));
 188         ut_asserteq_ptr(dev, NULL);
 189
 190         /* Move to the next child without using device_find_first_child() */
 191         ut_assertok(device_find_child_by_seq(bus, 5, true, &dev));
 192         ut_asserteq_str("c-test@5", dev->name);
 193         ut_assertok(device_find_next_child(&dev));
 194         ut_asserteq_str("c-test@0", dev->name);
 195
 196         /* Try a device with no children */
 197         ut_assertok(device_find_first_child(dev, &child));
 198         ut_asserteq_ptr(child, NULL);
 199
 200         return 0;
 201 }
 202 DM_TEST(dm_test_bus_children_iterators,
 203         DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 204
 205 /* Test that the bus can store data about each child */
 206 static int test_bus_parent_data(struct unit_test_state *uts)
 207 {
 208         struct dm_test_parent_data *parent_data;
 209         struct udevice *bus, *dev;
 210         struct uclass *uc;
 211         int value;
 212
 213         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 214
 215         /* Check that parent data is allocated */
 216         ut_assertok(device_find_child_by_seq(bus, 0, true, &dev));
 217         ut_asserteq_ptr(NULL, dev_get_parent_priv(dev));
 218         ut_assertok(device_get_child_by_seq(bus, 0, &dev));
 219         parent_data = dev_get_parent_priv(dev);
 220         ut_assert(NULL != parent_data);
 221
 222         /* Check that it starts at 0 and goes away when device is removed */
 223         parent_data->sum += 5;
 224         ut_asserteq(5, parent_data->sum);
 225         device_remove(dev);
 226         ut_asserteq_ptr(NULL, dev_get_parent_priv(dev));
 227
 228         /* Check that we can do this twice */
 229         ut_assertok(device_get_child_by_seq(bus, 0, &dev));
 230         parent_data = dev_get_parent_priv(dev);
 231         ut_assert(NULL != parent_data);
 232         parent_data->sum += 5;
 233         ut_asserteq(5, parent_data->sum);
 234
 235         /* Add parent data to all children */
 236         ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
 237         value = 5;
 238         uclass_foreach_dev(dev, uc) {
 239                 /* Ignore these if they are not on this bus */
 240                 if (dev->parent != bus) {
 241                         ut_asserteq_ptr(NULL, dev_get_parent_priv(dev));
 242                         continue;
 243                 }
 244                 ut_assertok(device_probe(dev));
 245                 parent_data = dev_get_parent_priv(dev);
 246
 247                 parent_data->sum = value;
 248                 value += 5;
 249         }
 250
 251         /* Check it is still there */
 252         value = 5;
 253         uclass_foreach_dev(dev, uc) {
 254                 /* Ignore these if they are not on this bus */
 255                 if (dev->parent != bus)
 256                         continue;
 257                 parent_data = dev_get_parent_priv(dev);
 258
 259                 ut_asserteq(value, parent_data->sum);
 260                 value += 5;
 261         }
 262
 263         return 0;
 264 }
 265 /* Test that the bus can store data about each child */
 266 static int dm_test_bus_parent_data(struct unit_test_state *uts)
 267 {
 268         return test_bus_parent_data(uts);
 269 }
 270 DM_TEST(dm_test_bus_parent_data, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 271
 272 /* As above but the size is controlled by the uclass */
 273 static int dm_test_bus_parent_data_uclass(struct unit_test_state *uts)
 274 {
 275         struct driver *drv;
 276         struct udevice *bus;
 277         int size;
 278         int ret;
 279
 280         /* Set the driver size to 0 so that the uclass size is used */
 281         ut_assertok(uclass_find_device(UCLASS_TEST_BUS, 0, &bus));
 282         drv = (struct driver *)bus->driver;
 283         size = drv->per_child_auto_alloc_size;
 284         bus->uclass->uc_drv->per_child_auto_alloc_size = size;
 285         drv->per_child_auto_alloc_size = 0;
 286         ret = test_bus_parent_data(uts);
 287         if (ret)
 288                 return ret;
 289         bus->uclass->uc_drv->per_child_auto_alloc_size = 0;
 290         drv->per_child_auto_alloc_size = size;
 291
 292         return 0;
 293 }
 294 DM_TEST(dm_test_bus_parent_data_uclass,
 295         DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 296
 297 /* Test that the bus ops are called when a child is probed/removed */
 298 static int dm_test_bus_parent_ops(struct unit_test_state *uts)
 299 {
 300         struct dm_test_parent_data *parent_data;
 301         struct dm_test_state *dms = uts->priv;
 302         struct udevice *bus, *dev;
 303         struct uclass *uc;
 304
 305         test_state = dms;
 306         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 307         ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
 308
 309         uclass_foreach_dev(dev, uc) {
 310                 /* Ignore these if they are not on this bus */
 311                 if (dev->parent != bus)
 312                         continue;
 313                 ut_asserteq_ptr(NULL, dev_get_parent_priv(dev));
 314
 315                 ut_assertok(device_probe(dev));
 316                 parent_data = dev_get_parent_priv(dev);
 317                 ut_asserteq(FLAG_CHILD_PROBED, parent_data->flag);
 318         }
 319
 320         uclass_foreach_dev(dev, uc) {
 321                 /* Ignore these if they are not on this bus */
 322                 if (dev->parent != bus)
 323                         continue;
 324                 parent_data = dev_get_parent_priv(dev);
 325                 ut_asserteq(FLAG_CHILD_PROBED, parent_data->flag);
 326                 ut_assertok(device_remove(dev));
 327                 ut_asserteq_ptr(NULL, dev_get_parent_priv(dev));
 328                 ut_asserteq_ptr(dms->removed, dev);
 329         }
 330         test_state = NULL;
 331
 332         return 0;
 333 }
 334 DM_TEST(dm_test_bus_parent_ops, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 335
 336 static int test_bus_parent_platdata(struct unit_test_state *uts)
 337 {
 338         struct dm_test_parent_platdata *plat;
 339         struct udevice *bus, *dev;
 340         int child_count;
 341
 342         /* Check that the bus has no children */
 343         ut_assertok(uclass_find_device(UCLASS_TEST_BUS, 0, &bus));
 344         device_find_first_child(bus, &dev);
 345         ut_asserteq_ptr(NULL, dev);
 346
 347         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 348
 349         for (device_find_first_child(bus, &dev), child_count = 0;
 350              dev;
 351              device_find_next_child(&dev)) {
 352                 /* Check that platform data is allocated */
 353                 plat = dev_get_parent_platdata(dev);
 354                 ut_assert(plat != NULL);
 355
 356                 /*
 357                  * Check that it is not affected by the device being
 358                  * probed/removed
 359                  */
 360                 plat->count++;
 361                 ut_asserteq(1, plat->count);
 362                 device_probe(dev);
 363                 device_remove(dev);
 364
 365                 ut_asserteq_ptr(plat, dev_get_parent_platdata(dev));
 366                 ut_asserteq(1, plat->count);
 367                 ut_assertok(device_probe(dev));
 368                 child_count++;
 369         }
 370         ut_asserteq(3, child_count);
 371
 372         /* Removing the bus should also have no effect (it is still bound) */
 373         device_remove(bus);
 374         for (device_find_first_child(bus, &dev), child_count = 0;
 375              dev;
 376              device_find_next_child(&dev)) {
 377                 /* Check that platform data is allocated */
 378                 plat = dev_get_parent_platdata(dev);
 379                 ut_assert(plat != NULL);
 380                 ut_asserteq(1, plat->count);
 381                 child_count++;
 382         }
 383         ut_asserteq(3, child_count);
 384
 385         /* Unbind all the children */
 386         do {
 387                 device_find_first_child(bus, &dev);
 388                 if (dev)
 389                         device_unbind(dev);
 390         } while (dev);
 391
 392         /* Now the child platdata should be removed and re-added */
 393         device_probe(bus);
 394         for (device_find_first_child(bus, &dev), child_count = 0;
 395              dev;
 396              device_find_next_child(&dev)) {
 397                 /* Check that platform data is allocated */
 398                 plat = dev_get_parent_platdata(dev);
 399                 ut_assert(plat != NULL);
 400                 ut_asserteq(0, plat->count);
 401                 child_count++;
 402         }
 403         ut_asserteq(3, child_count);
 404
 405         return 0;
 406 }
 407
 408 /* Test that the bus can store platform data about each child */
 409 static int dm_test_bus_parent_platdata(struct unit_test_state *uts)
 410 {
 411         return test_bus_parent_platdata(uts);
 412 }
 413 DM_TEST(dm_test_bus_parent_platdata, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 414
 415 /* As above but the size is controlled by the uclass */
 416 static int dm_test_bus_parent_platdata_uclass(struct unit_test_state *uts)
 417 {
 418         struct udevice *bus;
 419         struct driver *drv;
 420         int size;
 421         int ret;
 422
 423         /* Set the driver size to 0 so that the uclass size is used */
 424         ut_assertok(uclass_find_device(UCLASS_TEST_BUS, 0, &bus));
 425         drv = (struct driver *)bus->driver;
 426         size = drv->per_child_platdata_auto_alloc_size;
 427         bus->uclass->uc_drv->per_child_platdata_auto_alloc_size = size;
 428         drv->per_child_platdata_auto_alloc_size = 0;
 429         ret = test_bus_parent_platdata(uts);
 430         if (ret)
 431                 return ret;
 432         bus->uclass->uc_drv->per_child_platdata_auto_alloc_size = 0;
 433         drv->per_child_platdata_auto_alloc_size = size;
 434
 435         return 0;
 436 }
 437 DM_TEST(dm_test_bus_parent_platdata_uclass,
 438         DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 439
 440 /* Test that the child post_bind method is called */
 441 static int dm_test_bus_child_post_bind(struct unit_test_state *uts)
 442 {
 443         struct dm_test_parent_platdata *plat;
 444         struct udevice *bus, *dev;
 445         int child_count;
 446
 447         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 448         for (device_find_first_child(bus, &dev), child_count = 0;
 449              dev;
 450              device_find_next_child(&dev)) {
 451                 /* Check that platform data is allocated */
 452                 plat = dev_get_parent_platdata(dev);
 453                 ut_assert(plat != NULL);
 454                 ut_asserteq(1, plat->bind_flag);
 455                 child_count++;
 456         }
 457         ut_asserteq(3, child_count);
 458
 459         return 0;
 460 }
 461 DM_TEST(dm_test_bus_child_post_bind, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 462
 463 /* Test that the child post_bind method is called */
 464 static int dm_test_bus_child_post_bind_uclass(struct unit_test_state *uts)
 465 {
 466         struct dm_test_parent_platdata *plat;
 467         struct udevice *bus, *dev;
 468         int child_count;
 469
 470         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 471         for (device_find_first_child(bus, &dev), child_count = 0;
 472              dev;
 473              device_find_next_child(&dev)) {
 474                 /* Check that platform data is allocated */
 475                 plat = dev_get_parent_platdata(dev);
 476                 ut_assert(plat != NULL);
 477                 ut_asserteq(2, plat->uclass_bind_flag);
 478                 child_count++;
 479         }
 480         ut_asserteq(3, child_count);
 481
 482         return 0;
 483 }
 484 DM_TEST(dm_test_bus_child_post_bind_uclass,
 485         DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 486
 487 /*
 488  * Test that the bus' uclass' child_pre_probe() is called before the
 489  * device's probe() method
 490  */
 491 static int dm_test_bus_child_pre_probe_uclass(struct unit_test_state *uts)
 492 {
 493         struct udevice *bus, *dev;
 494         int child_count;
 495
 496         /*
 497          * See testfdt_drv_probe() which effectively checks that the uclass
 498          * flag is set before that method is called
 499          */
 500         ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
 501         for (device_find_first_child(bus, &dev), child_count = 0;
 502              dev;
 503              device_find_next_child(&dev)) {
 504                 struct dm_test_priv *priv = dev_get_priv(dev);
 505
 506                 /* Check that things happened in the right order */
 507                 ut_asserteq_ptr(NULL, priv);
 508                 ut_assertok(device_probe(dev));
 509
 510                 priv = dev_get_priv(dev);
 511                 ut_assert(priv != NULL);
 512                 ut_asserteq(1, priv->uclass_flag);
 513                 ut_asserteq(1, priv->uclass_total);
 514                 child_count++;
 515         }
 516         ut_asserteq(3, child_count);
 517
 518         return 0;
 519 }
 520 DM_TEST(dm_test_bus_child_pre_probe_uclass,
 521         DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);