1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Self tests for device tree subsystem 4 */ 5 6 #define pr_fmt(fmt) "### dt-test ### " fmt 7 8 #include <linux/memblock.h> 9 #include <linux/clk.h> 10 #include <linux/dma-direct.h> /* to test phys_to_dma/dma_to_phys */ 11 #include <linux/err.h> 12 #include <linux/errno.h> 13 #include <linux/hashtable.h> 14 #include <linux/libfdt.h> 15 #include <linux/of.h> 16 #include <linux/of_address.h> 17 #include <linux/of_fdt.h> 18 #include <linux/of_irq.h> 19 #include <linux/of_platform.h> 20 #include <linux/list.h> 21 #include <linux/mutex.h> 22 #include <linux/slab.h> 23 #include <linux/device.h> 24 #include <linux/platform_device.h> 25 #include <linux/kernel.h> 26 27 #include <linux/i2c.h> 28 #include <linux/i2c-mux.h> 29 #include <linux/gpio/driver.h> 30 31 #include <linux/bitops.h> 32 33 #include "of_private.h" 34 35 static struct unittest_results { 36 int passed; 37 int failed; 38 } unittest_results; 39 40 #define unittest(result, fmt, ...) ({ \ 41 bool failed = !(result); \ 42 if (failed) { \ 43 unittest_results.failed++; \ 44 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 45 } else { \ 46 unittest_results.passed++; \ 47 pr_info("pass %s():%i\n", __func__, __LINE__); \ 48 } \ 49 failed; \ 50 }) 51 52 /* 53 * Expected message may have a message level other than KERN_INFO. 54 * Print the expected message only if the current loglevel will allow 55 * the actual message to print. 56 * 57 * Do not use EXPECT_BEGIN(), EXPECT_END(), EXPECT_NOT_BEGIN(), or 58 * EXPECT_NOT_END() to report messages expected to be reported or not 59 * reported by pr_debug(). 60 */ 61 #define EXPECT_BEGIN(level, fmt, ...) \ 62 printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__) 63 64 #define EXPECT_END(level, fmt, ...) \ 65 printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__) 66 67 #define EXPECT_NOT_BEGIN(level, fmt, ...) \ 68 printk(level pr_fmt("EXPECT_NOT \\ : ") fmt, ##__VA_ARGS__) 69 70 #define EXPECT_NOT_END(level, fmt, ...) \ 71 printk(level pr_fmt("EXPECT_NOT / : ") fmt, ##__VA_ARGS__) 72 73 static void __init of_unittest_find_node_by_name(void) 74 { 75 struct device_node *np; 76 const char *options, *name; 77 78 np = of_find_node_by_path("/testcase-data"); 79 name = kasprintf(GFP_KERNEL, "%pOF", np); 80 unittest(np && !strcmp("/testcase-data", name), 81 "find /testcase-data failed\n"); 82 of_node_put(np); 83 kfree(name); 84 85 /* Test if trailing '/' works */ 86 np = of_find_node_by_path("/testcase-data/"); 87 unittest(!np, "trailing '/' on /testcase-data/ should fail\n"); 88 89 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 90 name = kasprintf(GFP_KERNEL, "%pOF", np); 91 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), 92 "find /testcase-data/phandle-tests/consumer-a failed\n"); 93 of_node_put(np); 94 kfree(name); 95 96 np = of_find_node_by_path("testcase-alias"); 97 name = kasprintf(GFP_KERNEL, "%pOF", np); 98 unittest(np && !strcmp("/testcase-data", name), 99 "find testcase-alias failed\n"); 100 of_node_put(np); 101 kfree(name); 102 103 /* Test if trailing '/' works on aliases */ 104 np = of_find_node_by_path("testcase-alias/"); 105 unittest(!np, "trailing '/' on testcase-alias/ should fail\n"); 106 107 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); 108 name = kasprintf(GFP_KERNEL, "%pOF", np); 109 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), 110 "find testcase-alias/phandle-tests/consumer-a failed\n"); 111 of_node_put(np); 112 kfree(name); 113 114 np = of_find_node_by_path("/testcase-data/missing-path"); 115 unittest(!np, "non-existent path returned node %pOF\n", np); 116 of_node_put(np); 117 118 np = of_find_node_by_path("missing-alias"); 119 unittest(!np, "non-existent alias returned node %pOF\n", np); 120 of_node_put(np); 121 122 np = of_find_node_by_path("testcase-alias/missing-path"); 123 unittest(!np, "non-existent alias with relative path returned node %pOF\n", np); 124 of_node_put(np); 125 126 np = of_find_node_opts_by_path("/testcase-data:testoption", &options); 127 unittest(np && !strcmp("testoption", options), 128 "option path test failed\n"); 129 of_node_put(np); 130 131 np = of_find_node_opts_by_path("/testcase-data:test/option", &options); 132 unittest(np && !strcmp("test/option", options), 133 "option path test, subcase #1 failed\n"); 134 of_node_put(np); 135 136 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options); 137 unittest(np && !strcmp("test/option", options), 138 "option path test, subcase #2 failed\n"); 139 of_node_put(np); 140 141 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); 142 unittest(np, "NULL option path test failed\n"); 143 of_node_put(np); 144 145 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", 146 &options); 147 unittest(np && !strcmp("testaliasoption", options), 148 "option alias path test failed\n"); 149 of_node_put(np); 150 151 np = of_find_node_opts_by_path("testcase-alias:test/alias/option", 152 &options); 153 unittest(np && !strcmp("test/alias/option", options), 154 "option alias path test, subcase #1 failed\n"); 155 of_node_put(np); 156 157 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); 158 unittest(np, "NULL option alias path test failed\n"); 159 of_node_put(np); 160 161 options = "testoption"; 162 np = of_find_node_opts_by_path("testcase-alias", &options); 163 unittest(np && !options, "option clearing test failed\n"); 164 of_node_put(np); 165 166 options = "testoption"; 167 np = of_find_node_opts_by_path("/", &options); 168 unittest(np && !options, "option clearing root node test failed\n"); 169 of_node_put(np); 170 } 171 172 static void __init of_unittest_dynamic(void) 173 { 174 struct device_node *np; 175 struct property *prop; 176 177 np = of_find_node_by_path("/testcase-data"); 178 if (!np) { 179 pr_err("missing testcase data\n"); 180 return; 181 } 182 183 /* Array of 4 properties for the purpose of testing */ 184 prop = kcalloc(4, sizeof(*prop), GFP_KERNEL); 185 if (!prop) { 186 unittest(0, "kzalloc() failed\n"); 187 return; 188 } 189 190 /* Add a new property - should pass*/ 191 prop->name = "new-property"; 192 prop->value = "new-property-data"; 193 prop->length = strlen(prop->value) + 1; 194 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); 195 196 /* Try to add an existing property - should fail */ 197 prop++; 198 prop->name = "new-property"; 199 prop->value = "new-property-data-should-fail"; 200 prop->length = strlen(prop->value) + 1; 201 unittest(of_add_property(np, prop) != 0, 202 "Adding an existing property should have failed\n"); 203 204 /* Try to modify an existing property - should pass */ 205 prop->value = "modify-property-data-should-pass"; 206 prop->length = strlen(prop->value) + 1; 207 unittest(of_update_property(np, prop) == 0, 208 "Updating an existing property should have passed\n"); 209 210 /* Try to modify non-existent property - should pass*/ 211 prop++; 212 prop->name = "modify-property"; 213 prop->value = "modify-missing-property-data-should-pass"; 214 prop->length = strlen(prop->value) + 1; 215 unittest(of_update_property(np, prop) == 0, 216 "Updating a missing property should have passed\n"); 217 218 /* Remove property - should pass */ 219 unittest(of_remove_property(np, prop) == 0, 220 "Removing a property should have passed\n"); 221 222 /* Adding very large property - should pass */ 223 prop++; 224 prop->name = "large-property-PAGE_SIZEx8"; 225 prop->length = PAGE_SIZE * 8; 226 prop->value = kzalloc(prop->length, GFP_KERNEL); 227 unittest(prop->value != NULL, "Unable to allocate large buffer\n"); 228 if (prop->value) 229 unittest(of_add_property(np, prop) == 0, 230 "Adding a large property should have passed\n"); 231 } 232 233 static int __init of_unittest_check_node_linkage(struct device_node *np) 234 { 235 struct device_node *child; 236 int count = 0, rc; 237 238 for_each_child_of_node(np, child) { 239 if (child->parent != np) { 240 pr_err("Child node %pOFn links to wrong parent %pOFn\n", 241 child, np); 242 rc = -EINVAL; 243 goto put_child; 244 } 245 246 rc = of_unittest_check_node_linkage(child); 247 if (rc < 0) 248 goto put_child; 249 count += rc; 250 } 251 252 return count + 1; 253 put_child: 254 of_node_put(child); 255 return rc; 256 } 257 258 static void __init of_unittest_check_tree_linkage(void) 259 { 260 struct device_node *np; 261 int allnode_count = 0, child_count; 262 263 if (!of_root) 264 return; 265 266 for_each_of_allnodes(np) 267 allnode_count++; 268 child_count = of_unittest_check_node_linkage(of_root); 269 270 unittest(child_count > 0, "Device node data structure is corrupted\n"); 271 unittest(child_count == allnode_count, 272 "allnodes list size (%i) doesn't match sibling lists size (%i)\n", 273 allnode_count, child_count); 274 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); 275 } 276 277 static void __init of_unittest_printf_one(struct device_node *np, const char *fmt, 278 const char *expected) 279 { 280 unsigned char *buf; 281 int buf_size; 282 int size, i; 283 284 buf_size = strlen(expected) + 10; 285 buf = kmalloc(buf_size, GFP_KERNEL); 286 if (!buf) 287 return; 288 289 /* Baseline; check conversion with a large size limit */ 290 memset(buf, 0xff, buf_size); 291 size = snprintf(buf, buf_size - 2, fmt, np); 292 293 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */ 294 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff), 295 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n", 296 fmt, expected, buf); 297 298 /* Make sure length limits work */ 299 size++; 300 for (i = 0; i < 2; i++, size--) { 301 /* Clear the buffer, and make sure it works correctly still */ 302 memset(buf, 0xff, buf_size); 303 snprintf(buf, size+1, fmt, np); 304 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff), 305 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n", 306 size, fmt, expected, buf); 307 } 308 kfree(buf); 309 } 310 311 static void __init of_unittest_printf(void) 312 { 313 struct device_node *np; 314 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100"; 315 char phandle_str[16] = ""; 316 317 np = of_find_node_by_path(full_name); 318 if (!np) { 319 unittest(np, "testcase data missing\n"); 320 return; 321 } 322 323 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0); 324 325 of_unittest_printf_one(np, "%pOF", full_name); 326 of_unittest_printf_one(np, "%pOFf", full_name); 327 of_unittest_printf_one(np, "%pOFn", "dev"); 328 of_unittest_printf_one(np, "%2pOFn", "dev"); 329 of_unittest_printf_one(np, "%5pOFn", " dev"); 330 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device"); 331 of_unittest_printf_one(np, "%pOFp", phandle_str); 332 of_unittest_printf_one(np, "%pOFP", "dev@100"); 333 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC"); 334 of_unittest_printf_one(np, "%10pOFP", " dev@100"); 335 of_unittest_printf_one(np, "%-10pOFP", "dev@100 "); 336 of_unittest_printf_one(of_root, "%pOFP", "/"); 337 of_unittest_printf_one(np, "%pOFF", "----"); 338 of_unittest_printf_one(np, "%pOFPF", "dev@100:----"); 339 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device"); 340 of_unittest_printf_one(np, "%pOFc", "test-sub-device"); 341 of_unittest_printf_one(np, "%pOFC", 342 "\"test-sub-device\",\"test-compat2\",\"test-compat3\""); 343 } 344 345 struct node_hash { 346 struct hlist_node node; 347 struct device_node *np; 348 }; 349 350 static DEFINE_HASHTABLE(phandle_ht, 8); 351 static void __init of_unittest_check_phandles(void) 352 { 353 struct device_node *np; 354 struct node_hash *nh; 355 struct hlist_node *tmp; 356 int i, dup_count = 0, phandle_count = 0; 357 358 for_each_of_allnodes(np) { 359 if (!np->phandle) 360 continue; 361 362 hash_for_each_possible(phandle_ht, nh, node, np->phandle) { 363 if (nh->np->phandle == np->phandle) { 364 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n", 365 np->phandle, nh->np, np); 366 dup_count++; 367 break; 368 } 369 } 370 371 nh = kzalloc(sizeof(*nh), GFP_KERNEL); 372 if (!nh) 373 return; 374 375 nh->np = np; 376 hash_add(phandle_ht, &nh->node, np->phandle); 377 phandle_count++; 378 } 379 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n", 380 dup_count, phandle_count); 381 382 /* Clean up */ 383 hash_for_each_safe(phandle_ht, i, tmp, nh, node) { 384 hash_del(&nh->node); 385 kfree(nh); 386 } 387 } 388 389 static void __init of_unittest_parse_phandle_with_args(void) 390 { 391 struct device_node *np; 392 struct of_phandle_args args; 393 int i, rc; 394 395 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 396 if (!np) { 397 pr_err("missing testcase data\n"); 398 return; 399 } 400 401 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 402 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 403 404 for (i = 0; i < 8; i++) { 405 bool passed = true; 406 407 memset(&args, 0, sizeof(args)); 408 rc = of_parse_phandle_with_args(np, "phandle-list", 409 "#phandle-cells", i, &args); 410 411 /* Test the values from tests-phandle.dtsi */ 412 switch (i) { 413 case 0: 414 passed &= !rc; 415 passed &= (args.args_count == 1); 416 passed &= (args.args[0] == (i + 1)); 417 break; 418 case 1: 419 passed &= !rc; 420 passed &= (args.args_count == 2); 421 passed &= (args.args[0] == (i + 1)); 422 passed &= (args.args[1] == 0); 423 break; 424 case 2: 425 passed &= (rc == -ENOENT); 426 break; 427 case 3: 428 passed &= !rc; 429 passed &= (args.args_count == 3); 430 passed &= (args.args[0] == (i + 1)); 431 passed &= (args.args[1] == 4); 432 passed &= (args.args[2] == 3); 433 break; 434 case 4: 435 passed &= !rc; 436 passed &= (args.args_count == 2); 437 passed &= (args.args[0] == (i + 1)); 438 passed &= (args.args[1] == 100); 439 break; 440 case 5: 441 passed &= !rc; 442 passed &= (args.args_count == 0); 443 break; 444 case 6: 445 passed &= !rc; 446 passed &= (args.args_count == 1); 447 passed &= (args.args[0] == (i + 1)); 448 break; 449 case 7: 450 passed &= (rc == -ENOENT); 451 break; 452 default: 453 passed = false; 454 } 455 456 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 457 i, args.np, rc); 458 } 459 460 /* Check for missing list property */ 461 memset(&args, 0, sizeof(args)); 462 rc = of_parse_phandle_with_args(np, "phandle-list-missing", 463 "#phandle-cells", 0, &args); 464 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 465 rc = of_count_phandle_with_args(np, "phandle-list-missing", 466 "#phandle-cells"); 467 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 468 469 /* Check for missing cells property */ 470 memset(&args, 0, sizeof(args)); 471 472 EXPECT_BEGIN(KERN_INFO, 473 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 474 475 rc = of_parse_phandle_with_args(np, "phandle-list", 476 "#phandle-cells-missing", 0, &args); 477 478 EXPECT_END(KERN_INFO, 479 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 480 481 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 482 483 EXPECT_BEGIN(KERN_INFO, 484 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 485 486 rc = of_count_phandle_with_args(np, "phandle-list", 487 "#phandle-cells-missing"); 488 489 EXPECT_END(KERN_INFO, 490 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 491 492 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 493 494 /* Check for bad phandle in list */ 495 memset(&args, 0, sizeof(args)); 496 497 EXPECT_BEGIN(KERN_INFO, 498 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 499 500 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", 501 "#phandle-cells", 0, &args); 502 503 EXPECT_END(KERN_INFO, 504 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 505 506 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 507 508 EXPECT_BEGIN(KERN_INFO, 509 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 510 511 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", 512 "#phandle-cells"); 513 514 EXPECT_END(KERN_INFO, 515 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 516 517 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 518 519 /* Check for incorrectly formed argument list */ 520 memset(&args, 0, sizeof(args)); 521 522 EXPECT_BEGIN(KERN_INFO, 523 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 524 525 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", 526 "#phandle-cells", 1, &args); 527 528 EXPECT_END(KERN_INFO, 529 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 530 531 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 532 533 EXPECT_BEGIN(KERN_INFO, 534 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 535 536 rc = of_count_phandle_with_args(np, "phandle-list-bad-args", 537 "#phandle-cells"); 538 539 EXPECT_END(KERN_INFO, 540 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 541 542 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 543 } 544 545 static void __init of_unittest_parse_phandle_with_args_map(void) 546 { 547 struct device_node *np, *p0, *p1, *p2, *p3; 548 struct of_phandle_args args; 549 int i, rc; 550 551 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b"); 552 if (!np) { 553 pr_err("missing testcase data\n"); 554 return; 555 } 556 557 p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0"); 558 if (!p0) { 559 pr_err("missing testcase data\n"); 560 return; 561 } 562 563 p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1"); 564 if (!p1) { 565 pr_err("missing testcase data\n"); 566 return; 567 } 568 569 p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2"); 570 if (!p2) { 571 pr_err("missing testcase data\n"); 572 return; 573 } 574 575 p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3"); 576 if (!p3) { 577 pr_err("missing testcase data\n"); 578 return; 579 } 580 581 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 582 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 583 584 for (i = 0; i < 8; i++) { 585 bool passed = true; 586 587 memset(&args, 0, sizeof(args)); 588 rc = of_parse_phandle_with_args_map(np, "phandle-list", 589 "phandle", i, &args); 590 591 /* Test the values from tests-phandle.dtsi */ 592 switch (i) { 593 case 0: 594 passed &= !rc; 595 passed &= (args.np == p1); 596 passed &= (args.args_count == 1); 597 passed &= (args.args[0] == 1); 598 break; 599 case 1: 600 passed &= !rc; 601 passed &= (args.np == p3); 602 passed &= (args.args_count == 3); 603 passed &= (args.args[0] == 2); 604 passed &= (args.args[1] == 5); 605 passed &= (args.args[2] == 3); 606 break; 607 case 2: 608 passed &= (rc == -ENOENT); 609 break; 610 case 3: 611 passed &= !rc; 612 passed &= (args.np == p0); 613 passed &= (args.args_count == 0); 614 break; 615 case 4: 616 passed &= !rc; 617 passed &= (args.np == p1); 618 passed &= (args.args_count == 1); 619 passed &= (args.args[0] == 3); 620 break; 621 case 5: 622 passed &= !rc; 623 passed &= (args.np == p0); 624 passed &= (args.args_count == 0); 625 break; 626 case 6: 627 passed &= !rc; 628 passed &= (args.np == p2); 629 passed &= (args.args_count == 2); 630 passed &= (args.args[0] == 15); 631 passed &= (args.args[1] == 0x20); 632 break; 633 case 7: 634 passed &= (rc == -ENOENT); 635 break; 636 default: 637 passed = false; 638 } 639 640 unittest(passed, "index %i - data error on node %s rc=%i\n", 641 i, args.np->full_name, rc); 642 } 643 644 /* Check for missing list property */ 645 memset(&args, 0, sizeof(args)); 646 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing", 647 "phandle", 0, &args); 648 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 649 650 /* Check for missing cells,map,mask property */ 651 memset(&args, 0, sizeof(args)); 652 653 EXPECT_BEGIN(KERN_INFO, 654 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1"); 655 656 rc = of_parse_phandle_with_args_map(np, "phandle-list", 657 "phandle-missing", 0, &args); 658 EXPECT_END(KERN_INFO, 659 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1"); 660 661 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 662 663 /* Check for bad phandle in list */ 664 memset(&args, 0, sizeof(args)); 665 666 EXPECT_BEGIN(KERN_INFO, 667 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle"); 668 669 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle", 670 "phandle", 0, &args); 671 EXPECT_END(KERN_INFO, 672 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle"); 673 674 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 675 676 /* Check for incorrectly formed argument list */ 677 memset(&args, 0, sizeof(args)); 678 679 EXPECT_BEGIN(KERN_INFO, 680 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1"); 681 682 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args", 683 "phandle", 1, &args); 684 EXPECT_END(KERN_INFO, 685 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1"); 686 687 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 688 } 689 690 static void __init of_unittest_property_string(void) 691 { 692 const char *strings[4]; 693 struct device_node *np; 694 int rc; 695 696 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 697 if (!np) { 698 pr_err("No testcase data in device tree\n"); 699 return; 700 } 701 702 rc = of_property_match_string(np, "phandle-list-names", "first"); 703 unittest(rc == 0, "first expected:0 got:%i\n", rc); 704 rc = of_property_match_string(np, "phandle-list-names", "second"); 705 unittest(rc == 1, "second expected:1 got:%i\n", rc); 706 rc = of_property_match_string(np, "phandle-list-names", "third"); 707 unittest(rc == 2, "third expected:2 got:%i\n", rc); 708 rc = of_property_match_string(np, "phandle-list-names", "fourth"); 709 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); 710 rc = of_property_match_string(np, "missing-property", "blah"); 711 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc); 712 rc = of_property_match_string(np, "empty-property", "blah"); 713 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc); 714 rc = of_property_match_string(np, "unterminated-string", "blah"); 715 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 716 717 /* of_property_count_strings() tests */ 718 rc = of_property_count_strings(np, "string-property"); 719 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 720 rc = of_property_count_strings(np, "phandle-list-names"); 721 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 722 rc = of_property_count_strings(np, "unterminated-string"); 723 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 724 rc = of_property_count_strings(np, "unterminated-string-list"); 725 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 726 727 /* of_property_read_string_index() tests */ 728 rc = of_property_read_string_index(np, "string-property", 0, strings); 729 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc); 730 strings[0] = NULL; 731 rc = of_property_read_string_index(np, "string-property", 1, strings); 732 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 733 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings); 734 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 735 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings); 736 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc); 737 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings); 738 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc); 739 strings[0] = NULL; 740 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings); 741 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 742 strings[0] = NULL; 743 rc = of_property_read_string_index(np, "unterminated-string", 0, strings); 744 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 745 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings); 746 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 747 strings[0] = NULL; 748 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */ 749 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 750 strings[1] = NULL; 751 752 /* of_property_read_string_array() tests */ 753 rc = of_property_read_string_array(np, "string-property", strings, 4); 754 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 755 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); 756 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 757 rc = of_property_read_string_array(np, "unterminated-string", strings, 4); 758 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 759 /* -- An incorrectly formed string should cause a failure */ 760 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4); 761 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 762 /* -- parsing the correctly formed strings should still work: */ 763 strings[2] = NULL; 764 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2); 765 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc); 766 strings[1] = NULL; 767 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1); 768 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]); 769 } 770 771 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \ 772 (p1)->value && (p2)->value && \ 773 !memcmp((p1)->value, (p2)->value, (p1)->length) && \ 774 !strcmp((p1)->name, (p2)->name)) 775 static void __init of_unittest_property_copy(void) 776 { 777 #ifdef CONFIG_OF_DYNAMIC 778 struct property p1 = { .name = "p1", .length = 0, .value = "" }; 779 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" }; 780 struct property *new; 781 782 new = __of_prop_dup(&p1, GFP_KERNEL); 783 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n"); 784 kfree(new->value); 785 kfree(new->name); 786 kfree(new); 787 788 new = __of_prop_dup(&p2, GFP_KERNEL); 789 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n"); 790 kfree(new->value); 791 kfree(new->name); 792 kfree(new); 793 #endif 794 } 795 796 static void __init of_unittest_changeset(void) 797 { 798 #ifdef CONFIG_OF_DYNAMIC 799 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" }; 800 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" }; 801 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" }; 802 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" }; 803 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; 804 struct property *ppremove; 805 struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np; 806 struct of_changeset chgset; 807 808 n1 = __of_node_dup(NULL, "n1"); 809 unittest(n1, "testcase setup failure\n"); 810 811 n2 = __of_node_dup(NULL, "n2"); 812 unittest(n2, "testcase setup failure\n"); 813 814 n21 = __of_node_dup(NULL, "n21"); 815 unittest(n21, "testcase setup failure %p\n", n21); 816 817 nchangeset = of_find_node_by_path("/testcase-data/changeset"); 818 nremove = of_get_child_by_name(nchangeset, "node-remove"); 819 unittest(nremove, "testcase setup failure\n"); 820 821 ppadd = __of_prop_dup(&padd, GFP_KERNEL); 822 unittest(ppadd, "testcase setup failure\n"); 823 824 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL); 825 unittest(ppname_n1, "testcase setup failure\n"); 826 827 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL); 828 unittest(ppname_n2, "testcase setup failure\n"); 829 830 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL); 831 unittest(ppname_n21, "testcase setup failure\n"); 832 833 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); 834 unittest(ppupdate, "testcase setup failure\n"); 835 836 parent = nchangeset; 837 n1->parent = parent; 838 n2->parent = parent; 839 n21->parent = n2; 840 841 ppremove = of_find_property(parent, "prop-remove", NULL); 842 unittest(ppremove, "failed to find removal prop"); 843 844 of_changeset_init(&chgset); 845 846 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); 847 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n"); 848 849 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); 850 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n"); 851 852 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); 853 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n"); 854 855 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); 856 857 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n"); 858 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); 859 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); 860 861 unittest(!of_changeset_apply(&chgset), "apply failed\n"); 862 863 of_node_put(nchangeset); 864 865 /* Make sure node names are constructed correctly */ 866 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), 867 "'%pOF' not added\n", n21); 868 of_node_put(np); 869 870 unittest(!of_changeset_revert(&chgset), "revert failed\n"); 871 872 of_changeset_destroy(&chgset); 873 874 of_node_put(n1); 875 of_node_put(n2); 876 of_node_put(n21); 877 #endif 878 } 879 880 static void __init of_unittest_dma_get_max_cpu_address(void) 881 { 882 struct device_node *np; 883 phys_addr_t cpu_addr; 884 885 if (!IS_ENABLED(CONFIG_OF_ADDRESS)) 886 return; 887 888 np = of_find_node_by_path("/testcase-data/address-tests"); 889 if (!np) { 890 pr_err("missing testcase data\n"); 891 return; 892 } 893 894 cpu_addr = of_dma_get_max_cpu_address(np); 895 unittest(cpu_addr == 0x4fffffff, 896 "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n", 897 &cpu_addr, 0x4fffffff); 898 } 899 900 static void __init of_unittest_dma_ranges_one(const char *path, 901 u64 expect_dma_addr, u64 expect_paddr) 902 { 903 #ifdef CONFIG_HAS_DMA 904 struct device_node *np; 905 const struct bus_dma_region *map = NULL; 906 int rc; 907 908 np = of_find_node_by_path(path); 909 if (!np) { 910 pr_err("missing testcase data\n"); 911 return; 912 } 913 914 rc = of_dma_get_range(np, &map); 915 916 unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc); 917 918 if (!rc) { 919 phys_addr_t paddr; 920 dma_addr_t dma_addr; 921 struct device *dev_bogus; 922 923 dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL); 924 if (!dev_bogus) { 925 unittest(0, "kzalloc() failed\n"); 926 kfree(map); 927 return; 928 } 929 930 dev_bogus->dma_range_map = map; 931 paddr = dma_to_phys(dev_bogus, expect_dma_addr); 932 dma_addr = phys_to_dma(dev_bogus, expect_paddr); 933 934 unittest(paddr == expect_paddr, 935 "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n", 936 &paddr, expect_paddr, np); 937 unittest(dma_addr == expect_dma_addr, 938 "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n", 939 &dma_addr, expect_dma_addr, np); 940 941 kfree(map); 942 kfree(dev_bogus); 943 } 944 of_node_put(np); 945 #endif 946 } 947 948 static void __init of_unittest_parse_dma_ranges(void) 949 { 950 of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000", 951 0x0, 0x20000000); 952 if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)) 953 of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000", 954 0x100000000, 0x20000000); 955 of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000", 956 0x80000000, 0x20000000); 957 } 958 959 static void __init of_unittest_pci_dma_ranges(void) 960 { 961 struct device_node *np; 962 struct of_pci_range range; 963 struct of_pci_range_parser parser; 964 int i = 0; 965 966 if (!IS_ENABLED(CONFIG_PCI)) 967 return; 968 969 np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000"); 970 if (!np) { 971 pr_err("missing testcase data\n"); 972 return; 973 } 974 975 if (of_pci_dma_range_parser_init(&parser, np)) { 976 pr_err("missing dma-ranges property\n"); 977 return; 978 } 979 980 /* 981 * Get the dma-ranges from the device tree 982 */ 983 for_each_of_pci_range(&parser, &range) { 984 if (!i) { 985 unittest(range.size == 0x10000000, 986 "for_each_of_pci_range wrong size on node %pOF size=%llx\n", 987 np, range.size); 988 unittest(range.cpu_addr == 0x20000000, 989 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF", 990 range.cpu_addr, np); 991 unittest(range.pci_addr == 0x80000000, 992 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF", 993 range.pci_addr, np); 994 } else { 995 unittest(range.size == 0x10000000, 996 "for_each_of_pci_range wrong size on node %pOF size=%llx\n", 997 np, range.size); 998 unittest(range.cpu_addr == 0x40000000, 999 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF", 1000 range.cpu_addr, np); 1001 unittest(range.pci_addr == 0xc0000000, 1002 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF", 1003 range.pci_addr, np); 1004 } 1005 i++; 1006 } 1007 1008 of_node_put(np); 1009 } 1010 1011 static void __init of_unittest_bus_ranges(void) 1012 { 1013 struct device_node *np; 1014 struct of_range range; 1015 struct of_range_parser parser; 1016 struct resource res; 1017 int ret, i = 0; 1018 1019 np = of_find_node_by_path("/testcase-data/address-tests"); 1020 if (!np) { 1021 pr_err("missing testcase data\n"); 1022 return; 1023 } 1024 1025 if (of_range_parser_init(&parser, np)) { 1026 pr_err("missing ranges property\n"); 1027 return; 1028 } 1029 1030 ret = of_range_to_resource(np, 1, &res); 1031 unittest(!ret, "of_range_to_resource returned error (%d) node %pOF\n", 1032 ret, np); 1033 unittest(resource_type(&res) == IORESOURCE_MEM, 1034 "of_range_to_resource wrong resource type on node %pOF res=%pR\n", 1035 np, &res); 1036 unittest(res.start == 0xd0000000, 1037 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n", 1038 np, &res); 1039 unittest(resource_size(&res) == 0x20000000, 1040 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n", 1041 np, &res); 1042 1043 /* 1044 * Get the "ranges" from the device tree 1045 */ 1046 for_each_of_range(&parser, &range) { 1047 unittest(range.flags == IORESOURCE_MEM, 1048 "for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n", 1049 np, range.flags, IORESOURCE_MEM); 1050 if (!i) { 1051 unittest(range.size == 0x50000000, 1052 "for_each_of_range wrong size on node %pOF size=%llx\n", 1053 np, range.size); 1054 unittest(range.cpu_addr == 0x70000000, 1055 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1056 range.cpu_addr, np); 1057 unittest(range.bus_addr == 0x70000000, 1058 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1059 range.pci_addr, np); 1060 } else { 1061 unittest(range.size == 0x20000000, 1062 "for_each_of_range wrong size on node %pOF size=%llx\n", 1063 np, range.size); 1064 unittest(range.cpu_addr == 0xd0000000, 1065 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1066 range.cpu_addr, np); 1067 unittest(range.bus_addr == 0x00000000, 1068 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1069 range.pci_addr, np); 1070 } 1071 i++; 1072 } 1073 1074 of_node_put(np); 1075 } 1076 1077 static void __init of_unittest_bus_3cell_ranges(void) 1078 { 1079 struct device_node *np; 1080 struct of_range range; 1081 struct of_range_parser parser; 1082 int i = 0; 1083 1084 np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000"); 1085 if (!np) { 1086 pr_err("missing testcase data\n"); 1087 return; 1088 } 1089 1090 if (of_range_parser_init(&parser, np)) { 1091 pr_err("missing ranges property\n"); 1092 return; 1093 } 1094 1095 /* 1096 * Get the "ranges" from the device tree 1097 */ 1098 for_each_of_range(&parser, &range) { 1099 if (!i) { 1100 unittest(range.flags == 0xf00baa, 1101 "for_each_of_range wrong flags on node %pOF flags=%x\n", 1102 np, range.flags); 1103 unittest(range.size == 0x100000, 1104 "for_each_of_range wrong size on node %pOF size=%llx\n", 1105 np, range.size); 1106 unittest(range.cpu_addr == 0xa0000000, 1107 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1108 range.cpu_addr, np); 1109 unittest(range.bus_addr == 0x0, 1110 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1111 range.pci_addr, np); 1112 } else { 1113 unittest(range.flags == 0xf00bee, 1114 "for_each_of_range wrong flags on node %pOF flags=%x\n", 1115 np, range.flags); 1116 unittest(range.size == 0x200000, 1117 "for_each_of_range wrong size on node %pOF size=%llx\n", 1118 np, range.size); 1119 unittest(range.cpu_addr == 0xb0000000, 1120 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1121 range.cpu_addr, np); 1122 unittest(range.bus_addr == 0x100000000, 1123 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1124 range.pci_addr, np); 1125 } 1126 i++; 1127 } 1128 1129 of_node_put(np); 1130 } 1131 1132 static void __init of_unittest_parse_interrupts(void) 1133 { 1134 struct device_node *np; 1135 struct of_phandle_args args; 1136 int i, rc; 1137 1138 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 1139 return; 1140 1141 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); 1142 if (!np) { 1143 pr_err("missing testcase data\n"); 1144 return; 1145 } 1146 1147 for (i = 0; i < 4; i++) { 1148 bool passed = true; 1149 1150 memset(&args, 0, sizeof(args)); 1151 rc = of_irq_parse_one(np, i, &args); 1152 1153 passed &= !rc; 1154 passed &= (args.args_count == 1); 1155 passed &= (args.args[0] == (i + 1)); 1156 1157 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1158 i, args.np, rc); 1159 } 1160 of_node_put(np); 1161 1162 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); 1163 if (!np) { 1164 pr_err("missing testcase data\n"); 1165 return; 1166 } 1167 1168 for (i = 0; i < 4; i++) { 1169 bool passed = true; 1170 1171 memset(&args, 0, sizeof(args)); 1172 rc = of_irq_parse_one(np, i, &args); 1173 1174 /* Test the values from tests-phandle.dtsi */ 1175 switch (i) { 1176 case 0: 1177 passed &= !rc; 1178 passed &= (args.args_count == 1); 1179 passed &= (args.args[0] == 9); 1180 break; 1181 case 1: 1182 passed &= !rc; 1183 passed &= (args.args_count == 3); 1184 passed &= (args.args[0] == 10); 1185 passed &= (args.args[1] == 11); 1186 passed &= (args.args[2] == 12); 1187 break; 1188 case 2: 1189 passed &= !rc; 1190 passed &= (args.args_count == 2); 1191 passed &= (args.args[0] == 13); 1192 passed &= (args.args[1] == 14); 1193 break; 1194 case 3: 1195 passed &= !rc; 1196 passed &= (args.args_count == 2); 1197 passed &= (args.args[0] == 15); 1198 passed &= (args.args[1] == 16); 1199 break; 1200 default: 1201 passed = false; 1202 } 1203 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1204 i, args.np, rc); 1205 } 1206 of_node_put(np); 1207 } 1208 1209 static void __init of_unittest_parse_interrupts_extended(void) 1210 { 1211 struct device_node *np; 1212 struct of_phandle_args args; 1213 int i, rc; 1214 1215 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 1216 return; 1217 1218 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); 1219 if (!np) { 1220 pr_err("missing testcase data\n"); 1221 return; 1222 } 1223 1224 for (i = 0; i < 7; i++) { 1225 bool passed = true; 1226 1227 memset(&args, 0, sizeof(args)); 1228 rc = of_irq_parse_one(np, i, &args); 1229 1230 /* Test the values from tests-phandle.dtsi */ 1231 switch (i) { 1232 case 0: 1233 passed &= !rc; 1234 passed &= (args.args_count == 1); 1235 passed &= (args.args[0] == 1); 1236 break; 1237 case 1: 1238 passed &= !rc; 1239 passed &= (args.args_count == 3); 1240 passed &= (args.args[0] == 2); 1241 passed &= (args.args[1] == 3); 1242 passed &= (args.args[2] == 4); 1243 break; 1244 case 2: 1245 passed &= !rc; 1246 passed &= (args.args_count == 2); 1247 passed &= (args.args[0] == 5); 1248 passed &= (args.args[1] == 6); 1249 break; 1250 case 3: 1251 passed &= !rc; 1252 passed &= (args.args_count == 1); 1253 passed &= (args.args[0] == 9); 1254 break; 1255 case 4: 1256 passed &= !rc; 1257 passed &= (args.args_count == 3); 1258 passed &= (args.args[0] == 10); 1259 passed &= (args.args[1] == 11); 1260 passed &= (args.args[2] == 12); 1261 break; 1262 case 5: 1263 passed &= !rc; 1264 passed &= (args.args_count == 2); 1265 passed &= (args.args[0] == 13); 1266 passed &= (args.args[1] == 14); 1267 break; 1268 case 6: 1269 /* 1270 * Tests child node that is missing property 1271 * #address-cells. See the comments in 1272 * drivers/of/unittest-data/tests-interrupts.dtsi 1273 * nodes intmap1 and interrupts-extended0 1274 */ 1275 passed &= !rc; 1276 passed &= (args.args_count == 1); 1277 passed &= (args.args[0] == 15); 1278 break; 1279 default: 1280 passed = false; 1281 } 1282 1283 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1284 i, args.np, rc); 1285 } 1286 of_node_put(np); 1287 } 1288 1289 static const struct of_device_id match_node_table[] = { 1290 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ 1291 { .data = "B", .type = "type1", }, /* followed by type alone */ 1292 1293 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ 1294 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ 1295 { .data = "Cc", .name = "name2", .type = "type2", }, 1296 1297 { .data = "E", .compatible = "compat3" }, 1298 { .data = "G", .compatible = "compat2", }, 1299 { .data = "H", .compatible = "compat2", .name = "name5", }, 1300 { .data = "I", .compatible = "compat2", .type = "type1", }, 1301 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, 1302 { .data = "K", .compatible = "compat2", .name = "name9", }, 1303 {} 1304 }; 1305 1306 static struct { 1307 const char *path; 1308 const char *data; 1309 } match_node_tests[] = { 1310 { .path = "/testcase-data/match-node/name0", .data = "A", }, 1311 { .path = "/testcase-data/match-node/name1", .data = "B", }, 1312 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, 1313 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, 1314 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, 1315 { .path = "/testcase-data/match-node/name3", .data = "E", }, 1316 { .path = "/testcase-data/match-node/name4", .data = "G", }, 1317 { .path = "/testcase-data/match-node/name5", .data = "H", }, 1318 { .path = "/testcase-data/match-node/name6", .data = "G", }, 1319 { .path = "/testcase-data/match-node/name7", .data = "I", }, 1320 { .path = "/testcase-data/match-node/name8", .data = "J", }, 1321 { .path = "/testcase-data/match-node/name9", .data = "K", }, 1322 }; 1323 1324 static void __init of_unittest_match_node(void) 1325 { 1326 struct device_node *np; 1327 const struct of_device_id *match; 1328 int i; 1329 1330 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { 1331 np = of_find_node_by_path(match_node_tests[i].path); 1332 if (!np) { 1333 unittest(0, "missing testcase node %s\n", 1334 match_node_tests[i].path); 1335 continue; 1336 } 1337 1338 match = of_match_node(match_node_table, np); 1339 if (!match) { 1340 unittest(0, "%s didn't match anything\n", 1341 match_node_tests[i].path); 1342 continue; 1343 } 1344 1345 if (strcmp(match->data, match_node_tests[i].data) != 0) { 1346 unittest(0, "%s got wrong match. expected %s, got %s\n", 1347 match_node_tests[i].path, match_node_tests[i].data, 1348 (const char *)match->data); 1349 continue; 1350 } 1351 unittest(1, "passed"); 1352 } 1353 } 1354 1355 static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2); 1356 static const struct platform_device_info test_bus_info = { 1357 .name = "unittest-bus", 1358 }; 1359 static void __init of_unittest_platform_populate(void) 1360 { 1361 int irq, rc; 1362 struct device_node *np, *child, *grandchild; 1363 struct platform_device *pdev, *test_bus; 1364 const struct of_device_id match[] = { 1365 { .compatible = "test-device", }, 1366 {} 1367 }; 1368 1369 np = of_find_node_by_path("/testcase-data"); 1370 of_platform_default_populate(np, NULL, NULL); 1371 1372 /* Test that a missing irq domain returns -EPROBE_DEFER */ 1373 np = of_find_node_by_path("/testcase-data/testcase-device1"); 1374 pdev = of_find_device_by_node(np); 1375 unittest(pdev, "device 1 creation failed\n"); 1376 1377 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) { 1378 irq = platform_get_irq(pdev, 0); 1379 unittest(irq == -EPROBE_DEFER, 1380 "device deferred probe failed - %d\n", irq); 1381 1382 /* Test that a parsing failure does not return -EPROBE_DEFER */ 1383 np = of_find_node_by_path("/testcase-data/testcase-device2"); 1384 pdev = of_find_device_by_node(np); 1385 unittest(pdev, "device 2 creation failed\n"); 1386 1387 EXPECT_BEGIN(KERN_INFO, 1388 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found"); 1389 1390 irq = platform_get_irq(pdev, 0); 1391 1392 EXPECT_END(KERN_INFO, 1393 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found"); 1394 1395 unittest(irq < 0 && irq != -EPROBE_DEFER, 1396 "device parsing error failed - %d\n", irq); 1397 } 1398 1399 np = of_find_node_by_path("/testcase-data/platform-tests"); 1400 unittest(np, "No testcase data in device tree\n"); 1401 if (!np) 1402 return; 1403 1404 test_bus = platform_device_register_full(&test_bus_info); 1405 rc = PTR_ERR_OR_ZERO(test_bus); 1406 unittest(!rc, "testbus registration failed; rc=%i\n", rc); 1407 if (rc) { 1408 of_node_put(np); 1409 return; 1410 } 1411 test_bus->dev.of_node = np; 1412 1413 /* 1414 * Add a dummy resource to the test bus node after it is 1415 * registered to catch problems with un-inserted resources. The 1416 * DT code doesn't insert the resources, and it has caused the 1417 * kernel to oops in the past. This makes sure the same bug 1418 * doesn't crop up again. 1419 */ 1420 platform_device_add_resources(test_bus, &test_bus_res, 1); 1421 1422 of_platform_populate(np, match, NULL, &test_bus->dev); 1423 for_each_child_of_node(np, child) { 1424 for_each_child_of_node(child, grandchild) { 1425 pdev = of_find_device_by_node(grandchild); 1426 unittest(pdev, 1427 "Could not create device for node '%pOFn'\n", 1428 grandchild); 1429 platform_device_put(pdev); 1430 } 1431 } 1432 1433 of_platform_depopulate(&test_bus->dev); 1434 for_each_child_of_node(np, child) { 1435 for_each_child_of_node(child, grandchild) 1436 unittest(!of_find_device_by_node(grandchild), 1437 "device didn't get destroyed '%pOFn'\n", 1438 grandchild); 1439 } 1440 1441 platform_device_unregister(test_bus); 1442 of_node_put(np); 1443 } 1444 1445 /** 1446 * update_node_properties - adds the properties 1447 * of np into dup node (present in live tree) and 1448 * updates parent of children of np to dup. 1449 * 1450 * @np: node whose properties are being added to the live tree 1451 * @dup: node present in live tree to be updated 1452 */ 1453 static void update_node_properties(struct device_node *np, 1454 struct device_node *dup) 1455 { 1456 struct property *prop; 1457 struct property *save_next; 1458 struct device_node *child; 1459 int ret; 1460 1461 for_each_child_of_node(np, child) 1462 child->parent = dup; 1463 1464 /* 1465 * "unittest internal error: unable to add testdata property" 1466 * 1467 * If this message reports a property in node '/__symbols__' then 1468 * the respective unittest overlay contains a label that has the 1469 * same name as a label in the live devicetree. The label will 1470 * be in the live devicetree only if the devicetree source was 1471 * compiled with the '-@' option. If you encounter this error, 1472 * please consider renaming __all__ of the labels in the unittest 1473 * overlay dts files with an odd prefix that is unlikely to be 1474 * used in a real devicetree. 1475 */ 1476 1477 /* 1478 * open code for_each_property_of_node() because of_add_property() 1479 * sets prop->next to NULL 1480 */ 1481 for (prop = np->properties; prop != NULL; prop = save_next) { 1482 save_next = prop->next; 1483 ret = of_add_property(dup, prop); 1484 if (ret) { 1485 if (ret == -EEXIST && !strcmp(prop->name, "name")) 1486 continue; 1487 pr_err("unittest internal error: unable to add testdata property %pOF/%s", 1488 np, prop->name); 1489 } 1490 } 1491 } 1492 1493 /** 1494 * attach_node_and_children - attaches nodes 1495 * and its children to live tree. 1496 * CAUTION: misleading function name - if node @np already exists in 1497 * the live tree then children of @np are *not* attached to the live 1498 * tree. This works for the current test devicetree nodes because such 1499 * nodes do not have child nodes. 1500 * 1501 * @np: Node to attach to live tree 1502 */ 1503 static void attach_node_and_children(struct device_node *np) 1504 { 1505 struct device_node *next, *dup, *child; 1506 unsigned long flags; 1507 const char *full_name; 1508 1509 full_name = kasprintf(GFP_KERNEL, "%pOF", np); 1510 1511 if (!strcmp(full_name, "/__local_fixups__") || 1512 !strcmp(full_name, "/__fixups__")) { 1513 kfree(full_name); 1514 return; 1515 } 1516 1517 dup = of_find_node_by_path(full_name); 1518 kfree(full_name); 1519 if (dup) { 1520 update_node_properties(np, dup); 1521 return; 1522 } 1523 1524 child = np->child; 1525 np->child = NULL; 1526 1527 mutex_lock(&of_mutex); 1528 raw_spin_lock_irqsave(&devtree_lock, flags); 1529 np->sibling = np->parent->child; 1530 np->parent->child = np; 1531 of_node_clear_flag(np, OF_DETACHED); 1532 raw_spin_unlock_irqrestore(&devtree_lock, flags); 1533 1534 __of_attach_node_sysfs(np); 1535 mutex_unlock(&of_mutex); 1536 1537 while (child) { 1538 next = child->sibling; 1539 attach_node_and_children(child); 1540 child = next; 1541 } 1542 } 1543 1544 /** 1545 * unittest_data_add - Reads, copies data from 1546 * linked tree and attaches it to the live tree 1547 */ 1548 static int __init unittest_data_add(void) 1549 { 1550 void *unittest_data; 1551 void *unittest_data_align; 1552 struct device_node *unittest_data_node = NULL, *np; 1553 /* 1554 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically 1555 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 1556 */ 1557 extern uint8_t __dtbo_testcases_begin[]; 1558 extern uint8_t __dtbo_testcases_end[]; 1559 const int size = __dtbo_testcases_end - __dtbo_testcases_begin; 1560 int rc; 1561 void *ret; 1562 1563 if (!size) { 1564 pr_warn("%s: testcases is empty\n", __func__); 1565 return -ENODATA; 1566 } 1567 1568 /* creating copy */ 1569 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL); 1570 if (!unittest_data) 1571 return -ENOMEM; 1572 1573 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE); 1574 memcpy(unittest_data_align, __dtbo_testcases_begin, size); 1575 1576 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node); 1577 if (!ret) { 1578 pr_warn("%s: unflatten testcases tree failed\n", __func__); 1579 kfree(unittest_data); 1580 return -ENODATA; 1581 } 1582 if (!unittest_data_node) { 1583 pr_warn("%s: testcases tree is empty\n", __func__); 1584 kfree(unittest_data); 1585 return -ENODATA; 1586 } 1587 1588 /* 1589 * This lock normally encloses of_resolve_phandles() 1590 */ 1591 of_overlay_mutex_lock(); 1592 1593 rc = of_resolve_phandles(unittest_data_node); 1594 if (rc) { 1595 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 1596 of_overlay_mutex_unlock(); 1597 return -EINVAL; 1598 } 1599 1600 if (!of_root) { 1601 of_root = unittest_data_node; 1602 for_each_of_allnodes(np) 1603 __of_attach_node_sysfs(np); 1604 of_aliases = of_find_node_by_path("/aliases"); 1605 of_chosen = of_find_node_by_path("/chosen"); 1606 of_overlay_mutex_unlock(); 1607 return 0; 1608 } 1609 1610 EXPECT_BEGIN(KERN_INFO, 1611 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1612 1613 /* attach the sub-tree to live tree */ 1614 np = unittest_data_node->child; 1615 while (np) { 1616 struct device_node *next = np->sibling; 1617 1618 np->parent = of_root; 1619 /* this will clear OF_DETACHED in np and children */ 1620 attach_node_and_children(np); 1621 np = next; 1622 } 1623 1624 EXPECT_END(KERN_INFO, 1625 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1626 1627 of_overlay_mutex_unlock(); 1628 1629 return 0; 1630 } 1631 1632 #ifdef CONFIG_OF_OVERLAY 1633 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id); 1634 1635 static int unittest_probe(struct platform_device *pdev) 1636 { 1637 struct device *dev = &pdev->dev; 1638 struct device_node *np = dev->of_node; 1639 1640 if (np == NULL) { 1641 dev_err(dev, "No OF data for device\n"); 1642 return -EINVAL; 1643 1644 } 1645 1646 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1647 1648 of_platform_populate(np, NULL, NULL, &pdev->dev); 1649 1650 return 0; 1651 } 1652 1653 static int unittest_remove(struct platform_device *pdev) 1654 { 1655 struct device *dev = &pdev->dev; 1656 struct device_node *np = dev->of_node; 1657 1658 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1659 return 0; 1660 } 1661 1662 static const struct of_device_id unittest_match[] = { 1663 { .compatible = "unittest", }, 1664 {}, 1665 }; 1666 1667 static struct platform_driver unittest_driver = { 1668 .probe = unittest_probe, 1669 .remove = unittest_remove, 1670 .driver = { 1671 .name = "unittest", 1672 .of_match_table = of_match_ptr(unittest_match), 1673 }, 1674 }; 1675 1676 /* get the platform device instantiated at the path */ 1677 static struct platform_device *of_path_to_platform_device(const char *path) 1678 { 1679 struct device_node *np; 1680 struct platform_device *pdev; 1681 1682 np = of_find_node_by_path(path); 1683 if (np == NULL) 1684 return NULL; 1685 1686 pdev = of_find_device_by_node(np); 1687 of_node_put(np); 1688 1689 return pdev; 1690 } 1691 1692 /* find out if a platform device exists at that path */ 1693 static int of_path_platform_device_exists(const char *path) 1694 { 1695 struct platform_device *pdev; 1696 1697 pdev = of_path_to_platform_device(path); 1698 platform_device_put(pdev); 1699 return pdev != NULL; 1700 } 1701 1702 #ifdef CONFIG_OF_GPIO 1703 1704 struct unittest_gpio_dev { 1705 struct gpio_chip chip; 1706 }; 1707 1708 static int unittest_gpio_chip_request_count; 1709 static int unittest_gpio_probe_count; 1710 static int unittest_gpio_probe_pass_count; 1711 1712 static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset) 1713 { 1714 unittest_gpio_chip_request_count++; 1715 1716 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset, 1717 unittest_gpio_chip_request_count); 1718 return 0; 1719 } 1720 1721 static int unittest_gpio_probe(struct platform_device *pdev) 1722 { 1723 struct unittest_gpio_dev *devptr; 1724 int ret; 1725 1726 unittest_gpio_probe_count++; 1727 1728 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL); 1729 if (!devptr) 1730 return -ENOMEM; 1731 1732 platform_set_drvdata(pdev, devptr); 1733 1734 devptr->chip.fwnode = dev_fwnode(&pdev->dev); 1735 devptr->chip.label = "of-unittest-gpio"; 1736 devptr->chip.base = -1; /* dynamic allocation */ 1737 devptr->chip.ngpio = 5; 1738 devptr->chip.request = unittest_gpio_chip_request; 1739 1740 ret = gpiochip_add_data(&devptr->chip, NULL); 1741 1742 unittest(!ret, 1743 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret); 1744 1745 if (!ret) 1746 unittest_gpio_probe_pass_count++; 1747 return ret; 1748 } 1749 1750 static int unittest_gpio_remove(struct platform_device *pdev) 1751 { 1752 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev); 1753 struct device *dev = &pdev->dev; 1754 1755 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode); 1756 1757 if (!devptr) 1758 return -EINVAL; 1759 1760 if (devptr->chip.base != -1) 1761 gpiochip_remove(&devptr->chip); 1762 1763 platform_set_drvdata(pdev, NULL); 1764 kfree(devptr); 1765 1766 return 0; 1767 } 1768 1769 static const struct of_device_id unittest_gpio_id[] = { 1770 { .compatible = "unittest-gpio", }, 1771 {} 1772 }; 1773 1774 static struct platform_driver unittest_gpio_driver = { 1775 .probe = unittest_gpio_probe, 1776 .remove = unittest_gpio_remove, 1777 .driver = { 1778 .name = "unittest-gpio", 1779 .of_match_table = of_match_ptr(unittest_gpio_id), 1780 }, 1781 }; 1782 1783 static void __init of_unittest_overlay_gpio(void) 1784 { 1785 int chip_request_count; 1786 int probe_pass_count; 1787 int ret; 1788 1789 /* 1790 * tests: apply overlays before registering driver 1791 * Similar to installing a driver as a module, the 1792 * driver is registered after applying the overlays. 1793 * 1794 * The overlays are applied by overlay_data_apply() 1795 * instead of of_unittest_apply_overlay() so that they 1796 * will not be tracked. Thus they will not be removed 1797 * by of_unittest_remove_tracked_overlays(). 1798 * 1799 * - apply overlay_gpio_01 1800 * - apply overlay_gpio_02a 1801 * - apply overlay_gpio_02b 1802 * - register driver 1803 * 1804 * register driver will result in 1805 * - probe and processing gpio hog for overlay_gpio_01 1806 * - probe for overlay_gpio_02a 1807 * - processing gpio for overlay_gpio_02b 1808 */ 1809 1810 probe_pass_count = unittest_gpio_probe_pass_count; 1811 chip_request_count = unittest_gpio_chip_request_count; 1812 1813 /* 1814 * overlay_gpio_01 contains gpio node and child gpio hog node 1815 * overlay_gpio_02a contains gpio node 1816 * overlay_gpio_02b contains child gpio hog node 1817 */ 1818 1819 unittest(overlay_data_apply("overlay_gpio_01", NULL), 1820 "Adding overlay 'overlay_gpio_01' failed\n"); 1821 1822 unittest(overlay_data_apply("overlay_gpio_02a", NULL), 1823 "Adding overlay 'overlay_gpio_02a' failed\n"); 1824 1825 unittest(overlay_data_apply("overlay_gpio_02b", NULL), 1826 "Adding overlay 'overlay_gpio_02b' failed\n"); 1827 1828 /* 1829 * messages are the result of the probes, after the 1830 * driver is registered 1831 */ 1832 1833 EXPECT_BEGIN(KERN_INFO, 1834 "gpio-<<int>> (line-B-input): hogged as input\n"); 1835 1836 EXPECT_BEGIN(KERN_INFO, 1837 "gpio-<<int>> (line-A-input): hogged as input\n"); 1838 1839 ret = platform_driver_register(&unittest_gpio_driver); 1840 if (unittest(ret == 0, "could not register unittest gpio driver\n")) 1841 return; 1842 1843 EXPECT_END(KERN_INFO, 1844 "gpio-<<int>> (line-A-input): hogged as input\n"); 1845 EXPECT_END(KERN_INFO, 1846 "gpio-<<int>> (line-B-input): hogged as input\n"); 1847 1848 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count, 1849 "unittest_gpio_probe() failed or not called\n"); 1850 1851 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count, 1852 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1853 unittest_gpio_chip_request_count - chip_request_count); 1854 1855 /* 1856 * tests: apply overlays after registering driver 1857 * 1858 * Similar to a driver built-in to the kernel, the 1859 * driver is registered before applying the overlays. 1860 * 1861 * overlay_gpio_03 contains gpio node and child gpio hog node 1862 * 1863 * - apply overlay_gpio_03 1864 * 1865 * apply overlay will result in 1866 * - probe and processing gpio hog. 1867 */ 1868 1869 probe_pass_count = unittest_gpio_probe_pass_count; 1870 chip_request_count = unittest_gpio_chip_request_count; 1871 1872 EXPECT_BEGIN(KERN_INFO, 1873 "gpio-<<int>> (line-D-input): hogged as input\n"); 1874 1875 /* overlay_gpio_03 contains gpio node and child gpio hog node */ 1876 1877 unittest(overlay_data_apply("overlay_gpio_03", NULL), 1878 "Adding overlay 'overlay_gpio_03' failed\n"); 1879 1880 EXPECT_END(KERN_INFO, 1881 "gpio-<<int>> (line-D-input): hogged as input\n"); 1882 1883 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1884 "unittest_gpio_probe() failed or not called\n"); 1885 1886 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1887 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1888 unittest_gpio_chip_request_count - chip_request_count); 1889 1890 /* 1891 * overlay_gpio_04a contains gpio node 1892 * 1893 * - apply overlay_gpio_04a 1894 * 1895 * apply the overlay will result in 1896 * - probe for overlay_gpio_04a 1897 */ 1898 1899 probe_pass_count = unittest_gpio_probe_pass_count; 1900 chip_request_count = unittest_gpio_chip_request_count; 1901 1902 /* overlay_gpio_04a contains gpio node */ 1903 1904 unittest(overlay_data_apply("overlay_gpio_04a", NULL), 1905 "Adding overlay 'overlay_gpio_04a' failed\n"); 1906 1907 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1908 "unittest_gpio_probe() failed or not called\n"); 1909 1910 /* 1911 * overlay_gpio_04b contains child gpio hog node 1912 * 1913 * - apply overlay_gpio_04b 1914 * 1915 * apply the overlay will result in 1916 * - processing gpio for overlay_gpio_04b 1917 */ 1918 1919 EXPECT_BEGIN(KERN_INFO, 1920 "gpio-<<int>> (line-C-input): hogged as input\n"); 1921 1922 /* overlay_gpio_04b contains child gpio hog node */ 1923 1924 unittest(overlay_data_apply("overlay_gpio_04b", NULL), 1925 "Adding overlay 'overlay_gpio_04b' failed\n"); 1926 1927 EXPECT_END(KERN_INFO, 1928 "gpio-<<int>> (line-C-input): hogged as input\n"); 1929 1930 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1931 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1932 unittest_gpio_chip_request_count - chip_request_count); 1933 } 1934 1935 #else 1936 1937 static void __init of_unittest_overlay_gpio(void) 1938 { 1939 /* skip tests */ 1940 } 1941 1942 #endif 1943 1944 #if IS_BUILTIN(CONFIG_I2C) 1945 1946 /* get the i2c client device instantiated at the path */ 1947 static struct i2c_client *of_path_to_i2c_client(const char *path) 1948 { 1949 struct device_node *np; 1950 struct i2c_client *client; 1951 1952 np = of_find_node_by_path(path); 1953 if (np == NULL) 1954 return NULL; 1955 1956 client = of_find_i2c_device_by_node(np); 1957 of_node_put(np); 1958 1959 return client; 1960 } 1961 1962 /* find out if a i2c client device exists at that path */ 1963 static int of_path_i2c_client_exists(const char *path) 1964 { 1965 struct i2c_client *client; 1966 1967 client = of_path_to_i2c_client(path); 1968 if (client) 1969 put_device(&client->dev); 1970 return client != NULL; 1971 } 1972 #else 1973 static int of_path_i2c_client_exists(const char *path) 1974 { 1975 return 0; 1976 } 1977 #endif 1978 1979 enum overlay_type { 1980 PDEV_OVERLAY, 1981 I2C_OVERLAY 1982 }; 1983 1984 static int of_path_device_type_exists(const char *path, 1985 enum overlay_type ovtype) 1986 { 1987 switch (ovtype) { 1988 case PDEV_OVERLAY: 1989 return of_path_platform_device_exists(path); 1990 case I2C_OVERLAY: 1991 return of_path_i2c_client_exists(path); 1992 } 1993 return 0; 1994 } 1995 1996 static const char *unittest_path(int nr, enum overlay_type ovtype) 1997 { 1998 const char *base; 1999 static char buf[256]; 2000 2001 switch (ovtype) { 2002 case PDEV_OVERLAY: 2003 base = "/testcase-data/overlay-node/test-bus"; 2004 break; 2005 case I2C_OVERLAY: 2006 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 2007 break; 2008 default: 2009 buf[0] = '\0'; 2010 return buf; 2011 } 2012 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 2013 buf[sizeof(buf) - 1] = '\0'; 2014 return buf; 2015 } 2016 2017 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 2018 { 2019 const char *path; 2020 2021 path = unittest_path(unittest_nr, ovtype); 2022 2023 switch (ovtype) { 2024 case PDEV_OVERLAY: 2025 return of_path_platform_device_exists(path); 2026 case I2C_OVERLAY: 2027 return of_path_i2c_client_exists(path); 2028 } 2029 return 0; 2030 } 2031 2032 static const char *overlay_name_from_nr(int nr) 2033 { 2034 static char buf[256]; 2035 2036 snprintf(buf, sizeof(buf) - 1, 2037 "overlay_%d", nr); 2038 buf[sizeof(buf) - 1] = '\0'; 2039 2040 return buf; 2041 } 2042 2043 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 2044 2045 #define MAX_TRACK_OVCS_IDS 256 2046 2047 static int track_ovcs_id[MAX_TRACK_OVCS_IDS]; 2048 static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS]; 2049 static int track_ovcs_id_cnt; 2050 2051 static void of_unittest_track_overlay(int ovcs_id, int overlay_nr) 2052 { 2053 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS)) 2054 return; 2055 2056 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id; 2057 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr; 2058 track_ovcs_id_cnt++; 2059 } 2060 2061 static void of_unittest_untrack_overlay(int ovcs_id) 2062 { 2063 if (WARN_ON(track_ovcs_id_cnt < 1)) 2064 return; 2065 2066 track_ovcs_id_cnt--; 2067 2068 /* If out of synch then test is broken. Do not try to recover. */ 2069 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id); 2070 } 2071 2072 static void of_unittest_remove_tracked_overlays(void) 2073 { 2074 int ret, ovcs_id, overlay_nr, save_ovcs_id; 2075 const char *overlay_name; 2076 2077 while (track_ovcs_id_cnt > 0) { 2078 2079 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1]; 2080 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1]; 2081 save_ovcs_id = ovcs_id; 2082 ret = of_overlay_remove(&ovcs_id); 2083 if (ret == -ENODEV) { 2084 overlay_name = overlay_name_from_nr(overlay_nr); 2085 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n", 2086 __func__, overlay_name, ret); 2087 } 2088 of_unittest_untrack_overlay(save_ovcs_id); 2089 } 2090 2091 } 2092 2093 static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id) 2094 { 2095 /* 2096 * The overlay will be tracked, thus it will be removed 2097 * by of_unittest_remove_tracked_overlays(). 2098 */ 2099 2100 const char *overlay_name; 2101 2102 overlay_name = overlay_name_from_nr(overlay_nr); 2103 2104 if (!overlay_data_apply(overlay_name, ovcs_id)) { 2105 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2106 return -EFAULT; 2107 } 2108 of_unittest_track_overlay(*ovcs_id, overlay_nr); 2109 2110 return 0; 2111 } 2112 2113 /* apply an overlay while checking before and after states */ 2114 static int __init of_unittest_apply_overlay_check(int overlay_nr, 2115 int unittest_nr, int before, int after, 2116 enum overlay_type ovtype) 2117 { 2118 int ret, ovcs_id; 2119 2120 /* unittest device must not be in before state */ 2121 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2122 unittest(0, "%s with device @\"%s\" %s\n", 2123 overlay_name_from_nr(overlay_nr), 2124 unittest_path(unittest_nr, ovtype), 2125 !before ? "enabled" : "disabled"); 2126 return -EINVAL; 2127 } 2128 2129 ovcs_id = 0; 2130 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2131 if (ret != 0) { 2132 /* of_unittest_apply_overlay already called unittest() */ 2133 return ret; 2134 } 2135 2136 /* unittest device must be to set to after state */ 2137 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2138 unittest(0, "%s failed to create @\"%s\" %s\n", 2139 overlay_name_from_nr(overlay_nr), 2140 unittest_path(unittest_nr, ovtype), 2141 !after ? "enabled" : "disabled"); 2142 return -EINVAL; 2143 } 2144 2145 return 0; 2146 } 2147 2148 /* apply an overlay and then revert it while checking before, after states */ 2149 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, 2150 int unittest_nr, int before, int after, 2151 enum overlay_type ovtype) 2152 { 2153 int ret, ovcs_id, save_ovcs_id; 2154 2155 /* unittest device must be in before state */ 2156 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2157 unittest(0, "%s with device @\"%s\" %s\n", 2158 overlay_name_from_nr(overlay_nr), 2159 unittest_path(unittest_nr, ovtype), 2160 !before ? "enabled" : "disabled"); 2161 return -EINVAL; 2162 } 2163 2164 /* apply the overlay */ 2165 ovcs_id = 0; 2166 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2167 if (ret != 0) { 2168 /* of_unittest_apply_overlay already called unittest() */ 2169 return ret; 2170 } 2171 2172 /* unittest device must be in after state */ 2173 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2174 unittest(0, "%s failed to create @\"%s\" %s\n", 2175 overlay_name_from_nr(overlay_nr), 2176 unittest_path(unittest_nr, ovtype), 2177 !after ? "enabled" : "disabled"); 2178 return -EINVAL; 2179 } 2180 2181 save_ovcs_id = ovcs_id; 2182 ret = of_overlay_remove(&ovcs_id); 2183 if (ret != 0) { 2184 unittest(0, "%s failed to be destroyed @\"%s\"\n", 2185 overlay_name_from_nr(overlay_nr), 2186 unittest_path(unittest_nr, ovtype)); 2187 return ret; 2188 } 2189 of_unittest_untrack_overlay(save_ovcs_id); 2190 2191 /* unittest device must be again in before state */ 2192 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 2193 unittest(0, "%s with device @\"%s\" %s\n", 2194 overlay_name_from_nr(overlay_nr), 2195 unittest_path(unittest_nr, ovtype), 2196 !before ? "enabled" : "disabled"); 2197 return -EINVAL; 2198 } 2199 2200 return 0; 2201 } 2202 2203 /* test activation of device */ 2204 static void __init of_unittest_overlay_0(void) 2205 { 2206 int ret; 2207 2208 EXPECT_BEGIN(KERN_INFO, 2209 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2210 2211 /* device should enable */ 2212 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); 2213 2214 EXPECT_END(KERN_INFO, 2215 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2216 2217 if (ret) 2218 return; 2219 2220 unittest(1, "overlay test %d passed\n", 0); 2221 } 2222 2223 /* test deactivation of device */ 2224 static void __init of_unittest_overlay_1(void) 2225 { 2226 int ret; 2227 2228 EXPECT_BEGIN(KERN_INFO, 2229 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2230 2231 /* device should disable */ 2232 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); 2233 2234 EXPECT_END(KERN_INFO, 2235 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2236 2237 if (ret) 2238 return; 2239 2240 unittest(1, "overlay test %d passed\n", 1); 2241 2242 } 2243 2244 /* test activation of device */ 2245 static void __init of_unittest_overlay_2(void) 2246 { 2247 int ret; 2248 2249 EXPECT_BEGIN(KERN_INFO, 2250 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2251 2252 /* device should enable */ 2253 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); 2254 2255 EXPECT_END(KERN_INFO, 2256 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2257 2258 if (ret) 2259 return; 2260 unittest(1, "overlay test %d passed\n", 2); 2261 } 2262 2263 /* test deactivation of device */ 2264 static void __init of_unittest_overlay_3(void) 2265 { 2266 int ret; 2267 2268 EXPECT_BEGIN(KERN_INFO, 2269 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2270 2271 /* device should disable */ 2272 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); 2273 2274 EXPECT_END(KERN_INFO, 2275 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2276 2277 if (ret) 2278 return; 2279 2280 unittest(1, "overlay test %d passed\n", 3); 2281 } 2282 2283 /* test activation of a full device node */ 2284 static void __init of_unittest_overlay_4(void) 2285 { 2286 /* device should disable */ 2287 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY)) 2288 return; 2289 2290 unittest(1, "overlay test %d passed\n", 4); 2291 } 2292 2293 /* test overlay apply/revert sequence */ 2294 static void __init of_unittest_overlay_5(void) 2295 { 2296 int ret; 2297 2298 EXPECT_BEGIN(KERN_INFO, 2299 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2300 2301 /* device should disable */ 2302 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); 2303 2304 EXPECT_END(KERN_INFO, 2305 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2306 2307 if (ret) 2308 return; 2309 2310 unittest(1, "overlay test %d passed\n", 5); 2311 } 2312 2313 /* test overlay application in sequence */ 2314 static void __init of_unittest_overlay_6(void) 2315 { 2316 int i, save_ovcs_id[2], ovcs_id; 2317 int overlay_nr = 6, unittest_nr = 6; 2318 int before = 0, after = 1; 2319 const char *overlay_name; 2320 2321 int ret; 2322 2323 /* unittest device must be in before state */ 2324 for (i = 0; i < 2; i++) { 2325 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2326 != before) { 2327 unittest(0, "%s with device @\"%s\" %s\n", 2328 overlay_name_from_nr(overlay_nr + i), 2329 unittest_path(unittest_nr + i, 2330 PDEV_OVERLAY), 2331 !before ? "enabled" : "disabled"); 2332 return; 2333 } 2334 } 2335 2336 /* apply the overlays */ 2337 2338 EXPECT_BEGIN(KERN_INFO, 2339 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2340 2341 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2342 2343 ret = overlay_data_apply(overlay_name, &ovcs_id); 2344 2345 if (!ret) { 2346 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2347 return; 2348 } 2349 save_ovcs_id[0] = ovcs_id; 2350 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2351 2352 EXPECT_END(KERN_INFO, 2353 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2354 2355 EXPECT_BEGIN(KERN_INFO, 2356 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2357 2358 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2359 2360 ret = overlay_data_apply(overlay_name, &ovcs_id); 2361 2362 if (!ret) { 2363 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2364 return; 2365 } 2366 save_ovcs_id[1] = ovcs_id; 2367 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2368 2369 EXPECT_END(KERN_INFO, 2370 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2371 2372 2373 for (i = 0; i < 2; i++) { 2374 /* unittest device must be in after state */ 2375 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2376 != after) { 2377 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 2378 overlay_name_from_nr(overlay_nr + i), 2379 unittest_path(unittest_nr + i, 2380 PDEV_OVERLAY), 2381 !after ? "enabled" : "disabled"); 2382 return; 2383 } 2384 } 2385 2386 for (i = 1; i >= 0; i--) { 2387 ovcs_id = save_ovcs_id[i]; 2388 if (of_overlay_remove(&ovcs_id)) { 2389 unittest(0, "%s failed destroy @\"%s\"\n", 2390 overlay_name_from_nr(overlay_nr + i), 2391 unittest_path(unittest_nr + i, 2392 PDEV_OVERLAY)); 2393 return; 2394 } 2395 of_unittest_untrack_overlay(save_ovcs_id[i]); 2396 } 2397 2398 for (i = 0; i < 2; i++) { 2399 /* unittest device must be again in before state */ 2400 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2401 != before) { 2402 unittest(0, "%s with device @\"%s\" %s\n", 2403 overlay_name_from_nr(overlay_nr + i), 2404 unittest_path(unittest_nr + i, 2405 PDEV_OVERLAY), 2406 !before ? "enabled" : "disabled"); 2407 return; 2408 } 2409 } 2410 2411 unittest(1, "overlay test %d passed\n", 6); 2412 2413 } 2414 2415 /* test overlay application in sequence */ 2416 static void __init of_unittest_overlay_8(void) 2417 { 2418 int i, save_ovcs_id[2], ovcs_id; 2419 int overlay_nr = 8, unittest_nr = 8; 2420 const char *overlay_name; 2421 int ret; 2422 2423 /* we don't care about device state in this test */ 2424 2425 EXPECT_BEGIN(KERN_INFO, 2426 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status"); 2427 2428 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2429 2430 ret = overlay_data_apply(overlay_name, &ovcs_id); 2431 if (!ret) 2432 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2433 2434 EXPECT_END(KERN_INFO, 2435 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status"); 2436 2437 if (!ret) 2438 return; 2439 2440 save_ovcs_id[0] = ovcs_id; 2441 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2442 2443 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2444 2445 EXPECT_BEGIN(KERN_INFO, 2446 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2447 2448 /* apply the overlays */ 2449 ret = overlay_data_apply(overlay_name, &ovcs_id); 2450 2451 EXPECT_END(KERN_INFO, 2452 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2453 2454 if (!ret) { 2455 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2456 return; 2457 } 2458 2459 save_ovcs_id[1] = ovcs_id; 2460 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2461 2462 /* now try to remove first overlay (it should fail) */ 2463 ovcs_id = save_ovcs_id[0]; 2464 2465 EXPECT_BEGIN(KERN_INFO, 2466 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2467 2468 EXPECT_BEGIN(KERN_INFO, 2469 "OF: overlay: overlay #6 is not topmost"); 2470 2471 ret = of_overlay_remove(&ovcs_id); 2472 2473 EXPECT_END(KERN_INFO, 2474 "OF: overlay: overlay #6 is not topmost"); 2475 2476 EXPECT_END(KERN_INFO, 2477 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2478 2479 if (!ret) { 2480 /* 2481 * Should never get here. If we do, expect a lot of 2482 * subsequent tracking and overlay removal related errors. 2483 */ 2484 unittest(0, "%s was destroyed @\"%s\"\n", 2485 overlay_name_from_nr(overlay_nr + 0), 2486 unittest_path(unittest_nr, 2487 PDEV_OVERLAY)); 2488 return; 2489 } 2490 2491 /* removing them in order should work */ 2492 for (i = 1; i >= 0; i--) { 2493 ovcs_id = save_ovcs_id[i]; 2494 if (of_overlay_remove(&ovcs_id)) { 2495 unittest(0, "%s not destroyed @\"%s\"\n", 2496 overlay_name_from_nr(overlay_nr + i), 2497 unittest_path(unittest_nr, 2498 PDEV_OVERLAY)); 2499 return; 2500 } 2501 of_unittest_untrack_overlay(save_ovcs_id[i]); 2502 } 2503 2504 unittest(1, "overlay test %d passed\n", 8); 2505 } 2506 2507 /* test insertion of a bus with parent devices */ 2508 static void __init of_unittest_overlay_10(void) 2509 { 2510 int ret; 2511 char *child_path; 2512 2513 /* device should disable */ 2514 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 2515 2516 if (unittest(ret == 0, 2517 "overlay test %d failed; overlay application\n", 10)) 2518 return; 2519 2520 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 2521 unittest_path(10, PDEV_OVERLAY)); 2522 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 2523 return; 2524 2525 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 2526 kfree(child_path); 2527 2528 unittest(ret, "overlay test %d failed; no child device\n", 10); 2529 } 2530 2531 /* test insertion of a bus with parent devices (and revert) */ 2532 static void __init of_unittest_overlay_11(void) 2533 { 2534 int ret; 2535 2536 /* device should disable */ 2537 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 2538 PDEV_OVERLAY); 2539 2540 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11); 2541 } 2542 2543 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 2544 2545 struct unittest_i2c_bus_data { 2546 struct platform_device *pdev; 2547 struct i2c_adapter adap; 2548 }; 2549 2550 static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 2551 struct i2c_msg *msgs, int num) 2552 { 2553 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 2554 2555 (void)std; 2556 2557 return num; 2558 } 2559 2560 static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 2561 { 2562 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 2563 } 2564 2565 static const struct i2c_algorithm unittest_i2c_algo = { 2566 .master_xfer = unittest_i2c_master_xfer, 2567 .functionality = unittest_i2c_functionality, 2568 }; 2569 2570 static int unittest_i2c_bus_probe(struct platform_device *pdev) 2571 { 2572 struct device *dev = &pdev->dev; 2573 struct device_node *np = dev->of_node; 2574 struct unittest_i2c_bus_data *std; 2575 struct i2c_adapter *adap; 2576 int ret; 2577 2578 if (np == NULL) { 2579 dev_err(dev, "No OF data for device\n"); 2580 return -EINVAL; 2581 2582 } 2583 2584 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2585 2586 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 2587 if (!std) 2588 return -ENOMEM; 2589 2590 /* link them together */ 2591 std->pdev = pdev; 2592 platform_set_drvdata(pdev, std); 2593 2594 adap = &std->adap; 2595 i2c_set_adapdata(adap, std); 2596 adap->nr = -1; 2597 strscpy(adap->name, pdev->name, sizeof(adap->name)); 2598 adap->class = I2C_CLASS_DEPRECATED; 2599 adap->algo = &unittest_i2c_algo; 2600 adap->dev.parent = dev; 2601 adap->dev.of_node = dev->of_node; 2602 adap->timeout = 5 * HZ; 2603 adap->retries = 3; 2604 2605 ret = i2c_add_numbered_adapter(adap); 2606 if (ret != 0) { 2607 dev_err(dev, "Failed to add I2C adapter\n"); 2608 return ret; 2609 } 2610 2611 return 0; 2612 } 2613 2614 static int unittest_i2c_bus_remove(struct platform_device *pdev) 2615 { 2616 struct device *dev = &pdev->dev; 2617 struct device_node *np = dev->of_node; 2618 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 2619 2620 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2621 i2c_del_adapter(&std->adap); 2622 2623 return 0; 2624 } 2625 2626 static const struct of_device_id unittest_i2c_bus_match[] = { 2627 { .compatible = "unittest-i2c-bus", }, 2628 {}, 2629 }; 2630 2631 static struct platform_driver unittest_i2c_bus_driver = { 2632 .probe = unittest_i2c_bus_probe, 2633 .remove = unittest_i2c_bus_remove, 2634 .driver = { 2635 .name = "unittest-i2c-bus", 2636 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 2637 }, 2638 }; 2639 2640 static int unittest_i2c_dev_probe(struct i2c_client *client) 2641 { 2642 struct device *dev = &client->dev; 2643 struct device_node *np = client->dev.of_node; 2644 2645 if (!np) { 2646 dev_err(dev, "No OF node\n"); 2647 return -EINVAL; 2648 } 2649 2650 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2651 2652 return 0; 2653 }; 2654 2655 static void unittest_i2c_dev_remove(struct i2c_client *client) 2656 { 2657 struct device *dev = &client->dev; 2658 struct device_node *np = client->dev.of_node; 2659 2660 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2661 } 2662 2663 static const struct i2c_device_id unittest_i2c_dev_id[] = { 2664 { .name = "unittest-i2c-dev" }, 2665 { } 2666 }; 2667 2668 static struct i2c_driver unittest_i2c_dev_driver = { 2669 .driver = { 2670 .name = "unittest-i2c-dev", 2671 }, 2672 .probe_new = unittest_i2c_dev_probe, 2673 .remove = unittest_i2c_dev_remove, 2674 .id_table = unittest_i2c_dev_id, 2675 }; 2676 2677 #if IS_BUILTIN(CONFIG_I2C_MUX) 2678 2679 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) 2680 { 2681 return 0; 2682 } 2683 2684 static int unittest_i2c_mux_probe(struct i2c_client *client) 2685 { 2686 int i, nchans; 2687 struct device *dev = &client->dev; 2688 struct i2c_adapter *adap = client->adapter; 2689 struct device_node *np = client->dev.of_node, *child; 2690 struct i2c_mux_core *muxc; 2691 u32 reg, max_reg; 2692 2693 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2694 2695 if (!np) { 2696 dev_err(dev, "No OF node\n"); 2697 return -EINVAL; 2698 } 2699 2700 max_reg = (u32)-1; 2701 for_each_child_of_node(np, child) { 2702 if (of_property_read_u32(child, "reg", ®)) 2703 continue; 2704 if (max_reg == (u32)-1 || reg > max_reg) 2705 max_reg = reg; 2706 } 2707 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 2708 if (nchans == 0) { 2709 dev_err(dev, "No channels\n"); 2710 return -EINVAL; 2711 } 2712 2713 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0, 2714 unittest_i2c_mux_select_chan, NULL); 2715 if (!muxc) 2716 return -ENOMEM; 2717 for (i = 0; i < nchans; i++) { 2718 if (i2c_mux_add_adapter(muxc, 0, i, 0)) { 2719 dev_err(dev, "Failed to register mux #%d\n", i); 2720 i2c_mux_del_adapters(muxc); 2721 return -ENODEV; 2722 } 2723 } 2724 2725 i2c_set_clientdata(client, muxc); 2726 2727 return 0; 2728 }; 2729 2730 static void unittest_i2c_mux_remove(struct i2c_client *client) 2731 { 2732 struct device *dev = &client->dev; 2733 struct device_node *np = client->dev.of_node; 2734 struct i2c_mux_core *muxc = i2c_get_clientdata(client); 2735 2736 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2737 i2c_mux_del_adapters(muxc); 2738 } 2739 2740 static const struct i2c_device_id unittest_i2c_mux_id[] = { 2741 { .name = "unittest-i2c-mux" }, 2742 { } 2743 }; 2744 2745 static struct i2c_driver unittest_i2c_mux_driver = { 2746 .driver = { 2747 .name = "unittest-i2c-mux", 2748 }, 2749 .probe_new = unittest_i2c_mux_probe, 2750 .remove = unittest_i2c_mux_remove, 2751 .id_table = unittest_i2c_mux_id, 2752 }; 2753 2754 #endif 2755 2756 static int of_unittest_overlay_i2c_init(void) 2757 { 2758 int ret; 2759 2760 ret = i2c_add_driver(&unittest_i2c_dev_driver); 2761 if (unittest(ret == 0, 2762 "could not register unittest i2c device driver\n")) 2763 return ret; 2764 2765 ret = platform_driver_register(&unittest_i2c_bus_driver); 2766 2767 if (unittest(ret == 0, 2768 "could not register unittest i2c bus driver\n")) 2769 return ret; 2770 2771 #if IS_BUILTIN(CONFIG_I2C_MUX) 2772 2773 EXPECT_BEGIN(KERN_INFO, 2774 "i2c i2c-1: Added multiplexed i2c bus 2"); 2775 2776 ret = i2c_add_driver(&unittest_i2c_mux_driver); 2777 2778 EXPECT_END(KERN_INFO, 2779 "i2c i2c-1: Added multiplexed i2c bus 2"); 2780 2781 if (unittest(ret == 0, 2782 "could not register unittest i2c mux driver\n")) 2783 return ret; 2784 #endif 2785 2786 return 0; 2787 } 2788 2789 static void of_unittest_overlay_i2c_cleanup(void) 2790 { 2791 #if IS_BUILTIN(CONFIG_I2C_MUX) 2792 i2c_del_driver(&unittest_i2c_mux_driver); 2793 #endif 2794 platform_driver_unregister(&unittest_i2c_bus_driver); 2795 i2c_del_driver(&unittest_i2c_dev_driver); 2796 } 2797 2798 static void __init of_unittest_overlay_i2c_12(void) 2799 { 2800 int ret; 2801 2802 /* device should enable */ 2803 EXPECT_BEGIN(KERN_INFO, 2804 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2805 2806 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); 2807 2808 EXPECT_END(KERN_INFO, 2809 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2810 2811 if (ret) 2812 return; 2813 2814 unittest(1, "overlay test %d passed\n", 12); 2815 } 2816 2817 /* test deactivation of device */ 2818 static void __init of_unittest_overlay_i2c_13(void) 2819 { 2820 int ret; 2821 2822 EXPECT_BEGIN(KERN_INFO, 2823 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2824 2825 /* device should disable */ 2826 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); 2827 2828 EXPECT_END(KERN_INFO, 2829 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2830 2831 if (ret) 2832 return; 2833 2834 unittest(1, "overlay test %d passed\n", 13); 2835 } 2836 2837 /* just check for i2c mux existence */ 2838 static void of_unittest_overlay_i2c_14(void) 2839 { 2840 } 2841 2842 static void __init of_unittest_overlay_i2c_15(void) 2843 { 2844 int ret; 2845 2846 /* device should enable */ 2847 EXPECT_BEGIN(KERN_INFO, 2848 "i2c i2c-1: Added multiplexed i2c bus 3"); 2849 2850 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY); 2851 2852 EXPECT_END(KERN_INFO, 2853 "i2c i2c-1: Added multiplexed i2c bus 3"); 2854 2855 if (ret) 2856 return; 2857 2858 unittest(1, "overlay test %d passed\n", 15); 2859 } 2860 2861 #else 2862 2863 static inline void of_unittest_overlay_i2c_14(void) { } 2864 static inline void of_unittest_overlay_i2c_15(void) { } 2865 2866 #endif 2867 2868 static int of_notify(struct notifier_block *nb, unsigned long action, 2869 void *arg) 2870 { 2871 struct of_overlay_notify_data *nd = arg; 2872 struct device_node *found; 2873 int ret; 2874 2875 /* 2876 * For overlay_16 .. overlay_19, check that returning an error 2877 * works for each of the actions by setting an arbitrary return 2878 * error number that matches the test number. e.g. for unittest16, 2879 * ret = -EBUSY which is -16. 2880 * 2881 * OVERLAY_INFO() for the overlays is declared to expect the same 2882 * error number, so overlay_data_apply() will return no error. 2883 * 2884 * overlay_20 will return NOTIFY_DONE 2885 */ 2886 2887 ret = 0; 2888 of_node_get(nd->overlay); 2889 2890 switch (action) { 2891 2892 case OF_OVERLAY_PRE_APPLY: 2893 found = of_find_node_by_name(nd->overlay, "test-unittest16"); 2894 if (found) { 2895 of_node_put(found); 2896 ret = -EBUSY; 2897 } 2898 break; 2899 2900 case OF_OVERLAY_POST_APPLY: 2901 found = of_find_node_by_name(nd->overlay, "test-unittest17"); 2902 if (found) { 2903 of_node_put(found); 2904 ret = -EEXIST; 2905 } 2906 break; 2907 2908 case OF_OVERLAY_PRE_REMOVE: 2909 found = of_find_node_by_name(nd->overlay, "test-unittest18"); 2910 if (found) { 2911 of_node_put(found); 2912 ret = -EXDEV; 2913 } 2914 break; 2915 2916 case OF_OVERLAY_POST_REMOVE: 2917 found = of_find_node_by_name(nd->overlay, "test-unittest19"); 2918 if (found) { 2919 of_node_put(found); 2920 ret = -ENODEV; 2921 } 2922 break; 2923 2924 default: /* should not happen */ 2925 of_node_put(nd->overlay); 2926 ret = -EINVAL; 2927 break; 2928 } 2929 2930 if (ret) 2931 return notifier_from_errno(ret); 2932 2933 return NOTIFY_DONE; 2934 } 2935 2936 static struct notifier_block of_nb = { 2937 .notifier_call = of_notify, 2938 }; 2939 2940 static void __init of_unittest_overlay_notify(void) 2941 { 2942 int ovcs_id; 2943 int ret; 2944 2945 ret = of_overlay_notifier_register(&of_nb); 2946 unittest(!ret, 2947 "of_overlay_notifier_register() failed, ret = %d\n", ret); 2948 if (ret) 2949 return; 2950 2951 /* 2952 * The overlays are applied by overlay_data_apply() 2953 * instead of of_unittest_apply_overlay() so that they 2954 * will not be tracked. Thus they will not be removed 2955 * by of_unittest_remove_tracked_overlays(). 2956 * 2957 * Applying overlays 16 - 19 will each trigger an error for a 2958 * different action in of_notify(). 2959 * 2960 * Applying overlay 20 will not trigger any error in of_notify(). 2961 */ 2962 2963 /* --- overlay 16 --- */ 2964 2965 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2966 2967 unittest(overlay_data_apply("overlay_16", &ovcs_id), 2968 "test OF_OVERLAY_PRE_APPLY notify injected error\n"); 2969 2970 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2971 2972 unittest(ovcs_id, "ovcs_id not created for overlay_16\n"); 2973 2974 /* --- overlay 17 --- */ 2975 2976 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2977 2978 unittest(overlay_data_apply("overlay_17", &ovcs_id), 2979 "test OF_OVERLAY_POST_APPLY notify injected error\n"); 2980 2981 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2982 2983 unittest(ovcs_id, "ovcs_id not created for overlay_17\n"); 2984 2985 if (ovcs_id) { 2986 ret = of_overlay_remove(&ovcs_id); 2987 unittest(!ret, 2988 "overlay_17 of_overlay_remove(), ret = %d\n", ret); 2989 } 2990 2991 /* --- overlay 18 --- */ 2992 2993 unittest(overlay_data_apply("overlay_18", &ovcs_id), 2994 "OF_OVERLAY_PRE_REMOVE notify injected error\n"); 2995 2996 unittest(ovcs_id, "ovcs_id not created for overlay_18\n"); 2997 2998 if (ovcs_id) { 2999 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 3000 3001 ret = of_overlay_remove(&ovcs_id); 3002 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 3003 if (ret == -EXDEV) { 3004 /* 3005 * change set ovcs_id should still exist 3006 */ 3007 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n"); 3008 } else { 3009 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n"); 3010 } 3011 } else { 3012 unittest(1, "ovcs_id not created for overlay_18\n"); 3013 } 3014 3015 unittest(ovcs_id, "ovcs_id removed for overlay_18\n"); 3016 3017 /* --- overlay 19 --- */ 3018 3019 unittest(overlay_data_apply("overlay_19", &ovcs_id), 3020 "OF_OVERLAY_POST_REMOVE notify injected error\n"); 3021 3022 unittest(ovcs_id, "ovcs_id not created for overlay_19\n"); 3023 3024 if (ovcs_id) { 3025 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3026 ret = of_overlay_remove(&ovcs_id); 3027 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3028 if (ret == -ENODEV) 3029 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n"); 3030 else 3031 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n"); 3032 } else { 3033 unittest(1, "ovcs_id removed for overlay_19\n"); 3034 } 3035 3036 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n", 3037 ovcs_id); 3038 3039 /* --- overlay 20 --- */ 3040 3041 unittest(overlay_data_apply("overlay_20", &ovcs_id), 3042 "overlay notify no injected error\n"); 3043 3044 if (ovcs_id) { 3045 ret = of_overlay_remove(&ovcs_id); 3046 if (ret) 3047 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n", 3048 ret); 3049 } else { 3050 unittest(1, "ovcs_id not created for overlay_20\n"); 3051 } 3052 3053 unittest(!of_overlay_notifier_unregister(&of_nb), 3054 "of_overlay_notifier_unregister() failed, ret = %d\n", ret); 3055 } 3056 3057 static void __init of_unittest_overlay(void) 3058 { 3059 struct device_node *bus_np = NULL; 3060 3061 if (platform_driver_register(&unittest_driver)) { 3062 unittest(0, "could not register unittest driver\n"); 3063 goto out; 3064 } 3065 3066 bus_np = of_find_node_by_path(bus_path); 3067 if (bus_np == NULL) { 3068 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 3069 goto out; 3070 } 3071 3072 if (of_platform_default_populate(bus_np, NULL, NULL)) { 3073 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 3074 goto out; 3075 } 3076 3077 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 3078 unittest(0, "could not find unittest0 @ \"%s\"\n", 3079 unittest_path(100, PDEV_OVERLAY)); 3080 goto out; 3081 } 3082 3083 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 3084 unittest(0, "unittest1 @ \"%s\" should not exist\n", 3085 unittest_path(101, PDEV_OVERLAY)); 3086 goto out; 3087 } 3088 3089 unittest(1, "basic infrastructure of overlays passed"); 3090 3091 /* tests in sequence */ 3092 of_unittest_overlay_0(); 3093 of_unittest_overlay_1(); 3094 of_unittest_overlay_2(); 3095 of_unittest_overlay_3(); 3096 of_unittest_overlay_4(); 3097 of_unittest_overlay_5(); 3098 of_unittest_overlay_6(); 3099 of_unittest_overlay_8(); 3100 3101 of_unittest_overlay_10(); 3102 of_unittest_overlay_11(); 3103 3104 #if IS_BUILTIN(CONFIG_I2C) 3105 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 3106 goto out; 3107 3108 of_unittest_overlay_i2c_12(); 3109 of_unittest_overlay_i2c_13(); 3110 of_unittest_overlay_i2c_14(); 3111 of_unittest_overlay_i2c_15(); 3112 3113 of_unittest_overlay_i2c_cleanup(); 3114 #endif 3115 3116 of_unittest_overlay_gpio(); 3117 3118 of_unittest_remove_tracked_overlays(); 3119 3120 of_unittest_overlay_notify(); 3121 3122 out: 3123 of_node_put(bus_np); 3124 } 3125 3126 #else 3127 static inline void __init of_unittest_overlay(void) { } 3128 #endif 3129 3130 static void __init of_unittest_lifecycle(void) 3131 { 3132 #ifdef CONFIG_OF_DYNAMIC 3133 unsigned int refcount; 3134 int found_refcount_one = 0; 3135 int put_count = 0; 3136 struct device_node *np; 3137 struct device_node *prev_sibling, *next_sibling; 3138 const char *refcount_path = "/testcase-data/refcount-node"; 3139 const char *refcount_parent_path = "/testcase-data"; 3140 3141 /* 3142 * Node lifecycle tests, non-dynamic node: 3143 * 3144 * - Decrementing refcount to zero via of_node_put() should cause the 3145 * attempt to free the node memory by of_node_release() to fail 3146 * because the node is not a dynamic node. 3147 * 3148 * - Decrementing refcount past zero should result in additional 3149 * errors reported. 3150 */ 3151 3152 np = of_find_node_by_path(refcount_path); 3153 unittest(np, "find refcount_path \"%s\"\n", refcount_path); 3154 if (np == NULL) 3155 goto out_skip_tests; 3156 3157 while (!found_refcount_one) { 3158 3159 if (put_count++ > 10) { 3160 unittest(0, "guardrail to avoid infinite loop\n"); 3161 goto out_skip_tests; 3162 } 3163 3164 refcount = kref_read(&np->kobj.kref); 3165 if (refcount == 1) 3166 found_refcount_one = 1; 3167 else 3168 of_node_put(np); 3169 } 3170 3171 EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3172 3173 /* 3174 * refcount is now one, decrementing to zero will result in a call to 3175 * of_node_release() to free the node's memory, which should result 3176 * in an error 3177 */ 3178 unittest(1, "/testcase-data/refcount-node is one"); 3179 of_node_put(np); 3180 3181 EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3182 3183 3184 /* 3185 * expect stack trace for subsequent of_node_put(): 3186 * __refcount_sub_and_test() calls: 3187 * refcount_warn_saturate(r, REFCOUNT_SUB_UAF) 3188 * 3189 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just 3190 * the first three lines, and the last line. 3191 */ 3192 EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3193 EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3194 EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3195 EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3196 3197 /* refcount is now zero, this should fail */ 3198 unittest(1, "/testcase-data/refcount-node is zero"); 3199 of_node_put(np); 3200 3201 EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3202 EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3203 EXPECT_END(KERN_INFO, "WARNING: <<all>>"); 3204 EXPECT_END(KERN_INFO, "------------[ cut here ]------------"); 3205 3206 /* 3207 * Q. do we expect to get yet another warning? 3208 * A. no, the WARNING is from WARN_ONCE() 3209 */ 3210 EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3211 EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3212 EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3213 EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3214 3215 unittest(1, "/testcase-data/refcount-node is zero, second time"); 3216 of_node_put(np); 3217 3218 EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3219 EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3220 EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>"); 3221 EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------"); 3222 3223 /* 3224 * refcount of zero will trigger stack traces from any further 3225 * attempt to of_node_get() node "refcount-node". One example of 3226 * this is where of_unittest_check_node_linkage() will recursively 3227 * scan the tree, with 'for_each_child_of_node()' doing an 3228 * of_node_get() of the children of a node. 3229 * 3230 * Prevent the stack trace by removing node "refcount-node" from 3231 * its parent's child list. 3232 * 3233 * WARNING: EVIL, EVIL, EVIL: 3234 * 3235 * Directly manipulate the child list of node /testcase-data to 3236 * remove child refcount-node. This is ignoring all proper methods 3237 * of removing a child and will leak a small amount of memory. 3238 */ 3239 3240 np = of_find_node_by_path(refcount_parent_path); 3241 unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path); 3242 unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n"); 3243 if (np == NULL) 3244 return; 3245 3246 prev_sibling = np->child; 3247 next_sibling = prev_sibling->sibling; 3248 if (!strcmp(prev_sibling->full_name, "refcount-node")) { 3249 np->child = next_sibling; 3250 next_sibling = next_sibling->sibling; 3251 } 3252 while (next_sibling) { 3253 if (!strcmp(next_sibling->full_name, "refcount-node")) 3254 prev_sibling->sibling = next_sibling->sibling; 3255 prev_sibling = next_sibling; 3256 next_sibling = next_sibling->sibling; 3257 } 3258 of_node_put(np); 3259 3260 return; 3261 3262 out_skip_tests: 3263 #endif 3264 unittest(0, "One or more lifecycle tests skipped\n"); 3265 } 3266 3267 #ifdef CONFIG_OF_OVERLAY 3268 3269 /* 3270 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are 3271 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 3272 */ 3273 3274 #define OVERLAY_INFO_EXTERN(overlay_name) \ 3275 extern uint8_t __dtbo_##overlay_name##_begin[]; \ 3276 extern uint8_t __dtbo_##overlay_name##_end[] 3277 3278 #define OVERLAY_INFO(overlay_name, expected) \ 3279 { .dtbo_begin = __dtbo_##overlay_name##_begin, \ 3280 .dtbo_end = __dtbo_##overlay_name##_end, \ 3281 .expected_result = expected, \ 3282 .name = #overlay_name, \ 3283 } 3284 3285 struct overlay_info { 3286 uint8_t *dtbo_begin; 3287 uint8_t *dtbo_end; 3288 int expected_result; 3289 int ovcs_id; 3290 char *name; 3291 }; 3292 3293 OVERLAY_INFO_EXTERN(overlay_base); 3294 OVERLAY_INFO_EXTERN(overlay); 3295 OVERLAY_INFO_EXTERN(overlay_0); 3296 OVERLAY_INFO_EXTERN(overlay_1); 3297 OVERLAY_INFO_EXTERN(overlay_2); 3298 OVERLAY_INFO_EXTERN(overlay_3); 3299 OVERLAY_INFO_EXTERN(overlay_4); 3300 OVERLAY_INFO_EXTERN(overlay_5); 3301 OVERLAY_INFO_EXTERN(overlay_6); 3302 OVERLAY_INFO_EXTERN(overlay_7); 3303 OVERLAY_INFO_EXTERN(overlay_8); 3304 OVERLAY_INFO_EXTERN(overlay_9); 3305 OVERLAY_INFO_EXTERN(overlay_10); 3306 OVERLAY_INFO_EXTERN(overlay_11); 3307 OVERLAY_INFO_EXTERN(overlay_12); 3308 OVERLAY_INFO_EXTERN(overlay_13); 3309 OVERLAY_INFO_EXTERN(overlay_15); 3310 OVERLAY_INFO_EXTERN(overlay_16); 3311 OVERLAY_INFO_EXTERN(overlay_17); 3312 OVERLAY_INFO_EXTERN(overlay_18); 3313 OVERLAY_INFO_EXTERN(overlay_19); 3314 OVERLAY_INFO_EXTERN(overlay_20); 3315 OVERLAY_INFO_EXTERN(overlay_gpio_01); 3316 OVERLAY_INFO_EXTERN(overlay_gpio_02a); 3317 OVERLAY_INFO_EXTERN(overlay_gpio_02b); 3318 OVERLAY_INFO_EXTERN(overlay_gpio_03); 3319 OVERLAY_INFO_EXTERN(overlay_gpio_04a); 3320 OVERLAY_INFO_EXTERN(overlay_gpio_04b); 3321 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); 3322 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); 3323 OVERLAY_INFO_EXTERN(overlay_bad_phandle); 3324 OVERLAY_INFO_EXTERN(overlay_bad_symbol); 3325 3326 /* entries found by name */ 3327 static struct overlay_info overlays[] = { 3328 OVERLAY_INFO(overlay_base, -9999), 3329 OVERLAY_INFO(overlay, 0), 3330 OVERLAY_INFO(overlay_0, 0), 3331 OVERLAY_INFO(overlay_1, 0), 3332 OVERLAY_INFO(overlay_2, 0), 3333 OVERLAY_INFO(overlay_3, 0), 3334 OVERLAY_INFO(overlay_4, 0), 3335 OVERLAY_INFO(overlay_5, 0), 3336 OVERLAY_INFO(overlay_6, 0), 3337 OVERLAY_INFO(overlay_7, 0), 3338 OVERLAY_INFO(overlay_8, 0), 3339 OVERLAY_INFO(overlay_9, 0), 3340 OVERLAY_INFO(overlay_10, 0), 3341 OVERLAY_INFO(overlay_11, 0), 3342 OVERLAY_INFO(overlay_12, 0), 3343 OVERLAY_INFO(overlay_13, 0), 3344 OVERLAY_INFO(overlay_15, 0), 3345 OVERLAY_INFO(overlay_16, -EBUSY), 3346 OVERLAY_INFO(overlay_17, -EEXIST), 3347 OVERLAY_INFO(overlay_18, 0), 3348 OVERLAY_INFO(overlay_19, 0), 3349 OVERLAY_INFO(overlay_20, 0), 3350 OVERLAY_INFO(overlay_gpio_01, 0), 3351 OVERLAY_INFO(overlay_gpio_02a, 0), 3352 OVERLAY_INFO(overlay_gpio_02b, 0), 3353 OVERLAY_INFO(overlay_gpio_03, 0), 3354 OVERLAY_INFO(overlay_gpio_04a, 0), 3355 OVERLAY_INFO(overlay_gpio_04b, 0), 3356 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), 3357 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), 3358 OVERLAY_INFO(overlay_bad_phandle, -EINVAL), 3359 OVERLAY_INFO(overlay_bad_symbol, -EINVAL), 3360 /* end marker */ 3361 {.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL} 3362 }; 3363 3364 static struct device_node *overlay_base_root; 3365 3366 static void * __init dt_alloc_memory(u64 size, u64 align) 3367 { 3368 void *ptr = memblock_alloc(size, align); 3369 3370 if (!ptr) 3371 panic("%s: Failed to allocate %llu bytes align=0x%llx\n", 3372 __func__, size, align); 3373 3374 return ptr; 3375 } 3376 3377 /* 3378 * Create base device tree for the overlay unittest. 3379 * 3380 * This is called from very early boot code. 3381 * 3382 * Do as much as possible the same way as done in __unflatten_device_tree 3383 * and other early boot steps for the normal FDT so that the overlay base 3384 * unflattened tree will have the same characteristics as the real tree 3385 * (such as having memory allocated by the early allocator). The goal 3386 * is to test "the real thing" as much as possible, and test "test setup 3387 * code" as little as possible. 3388 * 3389 * Have to stop before resolving phandles, because that uses kmalloc. 3390 */ 3391 void __init unittest_unflatten_overlay_base(void) 3392 { 3393 struct overlay_info *info; 3394 u32 data_size; 3395 void *new_fdt; 3396 u32 size; 3397 int found = 0; 3398 const char *overlay_name = "overlay_base"; 3399 3400 for (info = overlays; info && info->name; info++) { 3401 if (!strcmp(overlay_name, info->name)) { 3402 found = 1; 3403 break; 3404 } 3405 } 3406 if (!found) { 3407 pr_err("no overlay data for %s\n", overlay_name); 3408 return; 3409 } 3410 3411 info = &overlays[0]; 3412 3413 if (info->expected_result != -9999) { 3414 pr_err("No dtb 'overlay_base' to attach\n"); 3415 return; 3416 } 3417 3418 data_size = info->dtbo_end - info->dtbo_begin; 3419 if (!data_size) { 3420 pr_err("No dtb 'overlay_base' to attach\n"); 3421 return; 3422 } 3423 3424 size = fdt_totalsize(info->dtbo_begin); 3425 if (size != data_size) { 3426 pr_err("dtb 'overlay_base' header totalsize != actual size"); 3427 return; 3428 } 3429 3430 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); 3431 if (!new_fdt) { 3432 pr_err("alloc for dtb 'overlay_base' failed"); 3433 return; 3434 } 3435 3436 memcpy(new_fdt, info->dtbo_begin, size); 3437 3438 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root, 3439 dt_alloc_memory, true); 3440 } 3441 3442 /* 3443 * The purpose of of_unittest_overlay_data_add is to add an 3444 * overlay in the normal fashion. This is a test of the whole 3445 * picture, instead of testing individual elements. 3446 * 3447 * A secondary purpose is to be able to verify that the contents of 3448 * /proc/device-tree/ contains the updated structure and values from 3449 * the overlay. That must be verified separately in user space. 3450 * 3451 * Return 0 on unexpected error. 3452 */ 3453 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id) 3454 { 3455 struct overlay_info *info; 3456 int found = 0; 3457 int ret; 3458 u32 size; 3459 3460 for (info = overlays; info && info->name; info++) { 3461 if (!strcmp(overlay_name, info->name)) { 3462 found = 1; 3463 break; 3464 } 3465 } 3466 if (!found) { 3467 pr_err("no overlay data for %s\n", overlay_name); 3468 return 0; 3469 } 3470 3471 size = info->dtbo_end - info->dtbo_begin; 3472 if (!size) 3473 pr_err("no overlay data for %s\n", overlay_name); 3474 3475 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id); 3476 if (ovcs_id) 3477 *ovcs_id = info->ovcs_id; 3478 if (ret < 0) 3479 goto out; 3480 3481 pr_debug("%s applied\n", overlay_name); 3482 3483 out: 3484 if (ret != info->expected_result) 3485 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n", 3486 info->expected_result, ret, overlay_name); 3487 3488 return (ret == info->expected_result); 3489 } 3490 3491 /* 3492 * The purpose of of_unittest_overlay_high_level is to add an overlay 3493 * in the normal fashion. This is a test of the whole picture, 3494 * instead of individual elements. 3495 * 3496 * The first part of the function is _not_ normal overlay usage; it is 3497 * finishing splicing the base overlay device tree into the live tree. 3498 */ 3499 static __init void of_unittest_overlay_high_level(void) 3500 { 3501 struct device_node *last_sibling; 3502 struct device_node *np; 3503 struct device_node *of_symbols; 3504 struct device_node *overlay_base_symbols; 3505 struct device_node **pprev; 3506 struct property *prop; 3507 int ret; 3508 3509 if (!overlay_base_root) { 3510 unittest(0, "overlay_base_root not initialized\n"); 3511 return; 3512 } 3513 3514 /* 3515 * Could not fixup phandles in unittest_unflatten_overlay_base() 3516 * because kmalloc() was not yet available. 3517 */ 3518 of_overlay_mutex_lock(); 3519 of_resolve_phandles(overlay_base_root); 3520 of_overlay_mutex_unlock(); 3521 3522 3523 /* 3524 * do not allow overlay_base to duplicate any node already in 3525 * tree, this greatly simplifies the code 3526 */ 3527 3528 /* 3529 * remove overlay_base_root node "__local_fixups", after 3530 * being used by of_resolve_phandles() 3531 */ 3532 pprev = &overlay_base_root->child; 3533 for (np = overlay_base_root->child; np; np = np->sibling) { 3534 if (of_node_name_eq(np, "__local_fixups__")) { 3535 *pprev = np->sibling; 3536 break; 3537 } 3538 pprev = &np->sibling; 3539 } 3540 3541 /* remove overlay_base_root node "__symbols__" if in live tree */ 3542 of_symbols = of_get_child_by_name(of_root, "__symbols__"); 3543 if (of_symbols) { 3544 /* will have to graft properties from node into live tree */ 3545 pprev = &overlay_base_root->child; 3546 for (np = overlay_base_root->child; np; np = np->sibling) { 3547 if (of_node_name_eq(np, "__symbols__")) { 3548 overlay_base_symbols = np; 3549 *pprev = np->sibling; 3550 break; 3551 } 3552 pprev = &np->sibling; 3553 } 3554 } 3555 3556 for_each_child_of_node(overlay_base_root, np) { 3557 struct device_node *base_child; 3558 for_each_child_of_node(of_root, base_child) { 3559 if (!strcmp(np->full_name, base_child->full_name)) { 3560 unittest(0, "illegal node name in overlay_base %pOFn", 3561 np); 3562 of_node_put(np); 3563 of_node_put(base_child); 3564 return; 3565 } 3566 } 3567 } 3568 3569 /* 3570 * overlay 'overlay_base' is not allowed to have root 3571 * properties, so only need to splice nodes into main device tree. 3572 * 3573 * root node of *overlay_base_root will not be freed, it is lost 3574 * memory. 3575 */ 3576 3577 for (np = overlay_base_root->child; np; np = np->sibling) 3578 np->parent = of_root; 3579 3580 mutex_lock(&of_mutex); 3581 3582 for (last_sibling = np = of_root->child; np; np = np->sibling) 3583 last_sibling = np; 3584 3585 if (last_sibling) 3586 last_sibling->sibling = overlay_base_root->child; 3587 else 3588 of_root->child = overlay_base_root->child; 3589 3590 for_each_of_allnodes_from(overlay_base_root, np) 3591 __of_attach_node_sysfs(np); 3592 3593 if (of_symbols) { 3594 struct property *new_prop; 3595 for_each_property_of_node(overlay_base_symbols, prop) { 3596 3597 new_prop = __of_prop_dup(prop, GFP_KERNEL); 3598 if (!new_prop) { 3599 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__", 3600 prop->name); 3601 goto err_unlock; 3602 } 3603 if (__of_add_property(of_symbols, new_prop)) { 3604 kfree(new_prop->name); 3605 kfree(new_prop->value); 3606 kfree(new_prop); 3607 /* "name" auto-generated by unflatten */ 3608 if (!strcmp(prop->name, "name")) 3609 continue; 3610 unittest(0, "duplicate property '%s' in overlay_base node __symbols__", 3611 prop->name); 3612 goto err_unlock; 3613 } 3614 if (__of_add_property_sysfs(of_symbols, new_prop)) { 3615 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs", 3616 prop->name); 3617 goto err_unlock; 3618 } 3619 } 3620 } 3621 3622 mutex_unlock(&of_mutex); 3623 3624 3625 /* now do the normal overlay usage test */ 3626 3627 EXPECT_BEGIN(KERN_ERR, 3628 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3629 EXPECT_BEGIN(KERN_ERR, 3630 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 3631 EXPECT_BEGIN(KERN_ERR, 3632 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up"); 3633 EXPECT_BEGIN(KERN_ERR, 3634 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up"); 3635 EXPECT_BEGIN(KERN_ERR, 3636 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 3637 EXPECT_BEGIN(KERN_ERR, 3638 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3639 EXPECT_BEGIN(KERN_ERR, 3640 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3641 EXPECT_BEGIN(KERN_ERR, 3642 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3643 EXPECT_BEGIN(KERN_ERR, 3644 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3645 EXPECT_BEGIN(KERN_ERR, 3646 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3647 EXPECT_BEGIN(KERN_ERR, 3648 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3649 3650 ret = overlay_data_apply("overlay", NULL); 3651 3652 EXPECT_END(KERN_ERR, 3653 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3654 EXPECT_END(KERN_ERR, 3655 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3656 EXPECT_END(KERN_ERR, 3657 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3658 EXPECT_END(KERN_ERR, 3659 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3660 EXPECT_END(KERN_ERR, 3661 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3662 EXPECT_END(KERN_ERR, 3663 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3664 EXPECT_END(KERN_ERR, 3665 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 3666 EXPECT_END(KERN_ERR, 3667 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up"); 3668 EXPECT_END(KERN_ERR, 3669 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up"); 3670 EXPECT_END(KERN_ERR, 3671 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 3672 EXPECT_END(KERN_ERR, 3673 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3674 3675 unittest(ret, "Adding overlay 'overlay' failed\n"); 3676 3677 EXPECT_BEGIN(KERN_ERR, 3678 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3679 EXPECT_BEGIN(KERN_ERR, 3680 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3681 3682 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), 3683 "Adding overlay 'overlay_bad_add_dup_node' failed\n"); 3684 3685 EXPECT_END(KERN_ERR, 3686 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3687 EXPECT_END(KERN_ERR, 3688 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3689 3690 EXPECT_BEGIN(KERN_ERR, 3691 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 3692 EXPECT_BEGIN(KERN_ERR, 3693 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail"); 3694 EXPECT_BEGIN(KERN_ERR, 3695 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name"); 3696 3697 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL), 3698 "Adding overlay 'overlay_bad_add_dup_prop' failed\n"); 3699 3700 EXPECT_END(KERN_ERR, 3701 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name"); 3702 EXPECT_END(KERN_ERR, 3703 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail"); 3704 EXPECT_END(KERN_ERR, 3705 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 3706 3707 unittest(overlay_data_apply("overlay_bad_phandle", NULL), 3708 "Adding overlay 'overlay_bad_phandle' failed\n"); 3709 3710 unittest(overlay_data_apply("overlay_bad_symbol", NULL), 3711 "Adding overlay 'overlay_bad_symbol' failed\n"); 3712 3713 return; 3714 3715 err_unlock: 3716 mutex_unlock(&of_mutex); 3717 } 3718 3719 #else 3720 3721 static inline __init void of_unittest_overlay_high_level(void) {} 3722 3723 #endif 3724 3725 static int __init of_unittest(void) 3726 { 3727 struct device_node *np; 3728 int res; 3729 3730 pr_info("start of unittest - you will see error messages\n"); 3731 3732 /* Taint the kernel so we know we've run tests. */ 3733 add_taint(TAINT_TEST, LOCKDEP_STILL_OK); 3734 3735 /* adding data for unittest */ 3736 3737 if (IS_ENABLED(CONFIG_UML)) 3738 unittest_unflatten_overlay_base(); 3739 3740 res = unittest_data_add(); 3741 if (res) 3742 return res; 3743 if (!of_aliases) 3744 of_aliases = of_find_node_by_path("/aliases"); 3745 3746 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 3747 if (!np) { 3748 pr_info("No testcase data in device tree; not running tests\n"); 3749 return 0; 3750 } 3751 of_node_put(np); 3752 3753 of_unittest_check_tree_linkage(); 3754 of_unittest_check_phandles(); 3755 of_unittest_find_node_by_name(); 3756 of_unittest_dynamic(); 3757 of_unittest_parse_phandle_with_args(); 3758 of_unittest_parse_phandle_with_args_map(); 3759 of_unittest_printf(); 3760 of_unittest_property_string(); 3761 of_unittest_property_copy(); 3762 of_unittest_changeset(); 3763 of_unittest_parse_interrupts(); 3764 of_unittest_parse_interrupts_extended(); 3765 of_unittest_dma_get_max_cpu_address(); 3766 of_unittest_parse_dma_ranges(); 3767 of_unittest_pci_dma_ranges(); 3768 of_unittest_bus_ranges(); 3769 of_unittest_bus_3cell_ranges(); 3770 of_unittest_match_node(); 3771 of_unittest_platform_populate(); 3772 of_unittest_overlay(); 3773 of_unittest_lifecycle(); 3774 3775 /* Double check linkage after removing testcase data */ 3776 of_unittest_check_tree_linkage(); 3777 3778 of_unittest_overlay_high_level(); 3779 3780 pr_info("end of unittest - %i passed, %i failed\n", 3781 unittest_results.passed, unittest_results.failed); 3782 3783 return 0; 3784 } 3785 late_initcall(of_unittest); 3786