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, count, 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 count = of_range_count(&parser); 1044 unittest(count == 2, 1045 "of_range_count wrong size on node %pOF count=%d\n", 1046 np, count); 1047 1048 /* 1049 * Get the "ranges" from the device tree 1050 */ 1051 for_each_of_range(&parser, &range) { 1052 unittest(range.flags == IORESOURCE_MEM, 1053 "for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n", 1054 np, range.flags, IORESOURCE_MEM); 1055 if (!i) { 1056 unittest(range.size == 0x50000000, 1057 "for_each_of_range wrong size on node %pOF size=%llx\n", 1058 np, range.size); 1059 unittest(range.cpu_addr == 0x70000000, 1060 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1061 range.cpu_addr, np); 1062 unittest(range.bus_addr == 0x70000000, 1063 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1064 range.pci_addr, np); 1065 } else { 1066 unittest(range.size == 0x20000000, 1067 "for_each_of_range wrong size on node %pOF size=%llx\n", 1068 np, range.size); 1069 unittest(range.cpu_addr == 0xd0000000, 1070 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1071 range.cpu_addr, np); 1072 unittest(range.bus_addr == 0x00000000, 1073 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1074 range.pci_addr, np); 1075 } 1076 i++; 1077 } 1078 1079 of_node_put(np); 1080 } 1081 1082 static void __init of_unittest_bus_3cell_ranges(void) 1083 { 1084 struct device_node *np; 1085 struct of_range range; 1086 struct of_range_parser parser; 1087 int i = 0; 1088 1089 np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000"); 1090 if (!np) { 1091 pr_err("missing testcase data\n"); 1092 return; 1093 } 1094 1095 if (of_range_parser_init(&parser, np)) { 1096 pr_err("missing ranges property\n"); 1097 return; 1098 } 1099 1100 /* 1101 * Get the "ranges" from the device tree 1102 */ 1103 for_each_of_range(&parser, &range) { 1104 if (!i) { 1105 unittest(range.flags == 0xf00baa, 1106 "for_each_of_range wrong flags on node %pOF flags=%x\n", 1107 np, range.flags); 1108 unittest(range.size == 0x100000, 1109 "for_each_of_range wrong size on node %pOF size=%llx\n", 1110 np, range.size); 1111 unittest(range.cpu_addr == 0xa0000000, 1112 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1113 range.cpu_addr, np); 1114 unittest(range.bus_addr == 0x0, 1115 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1116 range.pci_addr, np); 1117 } else { 1118 unittest(range.flags == 0xf00bee, 1119 "for_each_of_range wrong flags on node %pOF flags=%x\n", 1120 np, range.flags); 1121 unittest(range.size == 0x200000, 1122 "for_each_of_range wrong size on node %pOF size=%llx\n", 1123 np, range.size); 1124 unittest(range.cpu_addr == 0xb0000000, 1125 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1126 range.cpu_addr, np); 1127 unittest(range.bus_addr == 0x100000000, 1128 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1129 range.pci_addr, np); 1130 } 1131 i++; 1132 } 1133 1134 of_node_put(np); 1135 } 1136 1137 static void __init of_unittest_reg(void) 1138 { 1139 struct device_node *np; 1140 int ret; 1141 u64 addr, size; 1142 1143 np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000"); 1144 if (!np) { 1145 pr_err("missing testcase data\n"); 1146 return; 1147 } 1148 1149 ret = of_property_read_reg(np, 0, &addr, &size); 1150 unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n", 1151 np, ret); 1152 unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n", 1153 np, addr); 1154 1155 of_node_put(np); 1156 } 1157 1158 static void __init of_unittest_parse_interrupts(void) 1159 { 1160 struct device_node *np; 1161 struct of_phandle_args args; 1162 int i, rc; 1163 1164 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 1165 return; 1166 1167 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); 1168 if (!np) { 1169 pr_err("missing testcase data\n"); 1170 return; 1171 } 1172 1173 for (i = 0; i < 4; i++) { 1174 bool passed = true; 1175 1176 memset(&args, 0, sizeof(args)); 1177 rc = of_irq_parse_one(np, i, &args); 1178 1179 passed &= !rc; 1180 passed &= (args.args_count == 1); 1181 passed &= (args.args[0] == (i + 1)); 1182 1183 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1184 i, args.np, rc); 1185 } 1186 of_node_put(np); 1187 1188 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); 1189 if (!np) { 1190 pr_err("missing testcase data\n"); 1191 return; 1192 } 1193 1194 for (i = 0; i < 4; i++) { 1195 bool passed = true; 1196 1197 memset(&args, 0, sizeof(args)); 1198 rc = of_irq_parse_one(np, i, &args); 1199 1200 /* Test the values from tests-phandle.dtsi */ 1201 switch (i) { 1202 case 0: 1203 passed &= !rc; 1204 passed &= (args.args_count == 1); 1205 passed &= (args.args[0] == 9); 1206 break; 1207 case 1: 1208 passed &= !rc; 1209 passed &= (args.args_count == 3); 1210 passed &= (args.args[0] == 10); 1211 passed &= (args.args[1] == 11); 1212 passed &= (args.args[2] == 12); 1213 break; 1214 case 2: 1215 passed &= !rc; 1216 passed &= (args.args_count == 2); 1217 passed &= (args.args[0] == 13); 1218 passed &= (args.args[1] == 14); 1219 break; 1220 case 3: 1221 passed &= !rc; 1222 passed &= (args.args_count == 2); 1223 passed &= (args.args[0] == 15); 1224 passed &= (args.args[1] == 16); 1225 break; 1226 default: 1227 passed = false; 1228 } 1229 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1230 i, args.np, rc); 1231 } 1232 of_node_put(np); 1233 } 1234 1235 static void __init of_unittest_parse_interrupts_extended(void) 1236 { 1237 struct device_node *np; 1238 struct of_phandle_args args; 1239 int i, rc; 1240 1241 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 1242 return; 1243 1244 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); 1245 if (!np) { 1246 pr_err("missing testcase data\n"); 1247 return; 1248 } 1249 1250 for (i = 0; i < 7; i++) { 1251 bool passed = true; 1252 1253 memset(&args, 0, sizeof(args)); 1254 rc = of_irq_parse_one(np, i, &args); 1255 1256 /* Test the values from tests-phandle.dtsi */ 1257 switch (i) { 1258 case 0: 1259 passed &= !rc; 1260 passed &= (args.args_count == 1); 1261 passed &= (args.args[0] == 1); 1262 break; 1263 case 1: 1264 passed &= !rc; 1265 passed &= (args.args_count == 3); 1266 passed &= (args.args[0] == 2); 1267 passed &= (args.args[1] == 3); 1268 passed &= (args.args[2] == 4); 1269 break; 1270 case 2: 1271 passed &= !rc; 1272 passed &= (args.args_count == 2); 1273 passed &= (args.args[0] == 5); 1274 passed &= (args.args[1] == 6); 1275 break; 1276 case 3: 1277 passed &= !rc; 1278 passed &= (args.args_count == 1); 1279 passed &= (args.args[0] == 9); 1280 break; 1281 case 4: 1282 passed &= !rc; 1283 passed &= (args.args_count == 3); 1284 passed &= (args.args[0] == 10); 1285 passed &= (args.args[1] == 11); 1286 passed &= (args.args[2] == 12); 1287 break; 1288 case 5: 1289 passed &= !rc; 1290 passed &= (args.args_count == 2); 1291 passed &= (args.args[0] == 13); 1292 passed &= (args.args[1] == 14); 1293 break; 1294 case 6: 1295 /* 1296 * Tests child node that is missing property 1297 * #address-cells. See the comments in 1298 * drivers/of/unittest-data/tests-interrupts.dtsi 1299 * nodes intmap1 and interrupts-extended0 1300 */ 1301 passed &= !rc; 1302 passed &= (args.args_count == 1); 1303 passed &= (args.args[0] == 15); 1304 break; 1305 default: 1306 passed = false; 1307 } 1308 1309 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1310 i, args.np, rc); 1311 } 1312 of_node_put(np); 1313 } 1314 1315 static const struct of_device_id match_node_table[] = { 1316 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ 1317 { .data = "B", .type = "type1", }, /* followed by type alone */ 1318 1319 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ 1320 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ 1321 { .data = "Cc", .name = "name2", .type = "type2", }, 1322 1323 { .data = "E", .compatible = "compat3" }, 1324 { .data = "G", .compatible = "compat2", }, 1325 { .data = "H", .compatible = "compat2", .name = "name5", }, 1326 { .data = "I", .compatible = "compat2", .type = "type1", }, 1327 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, 1328 { .data = "K", .compatible = "compat2", .name = "name9", }, 1329 {} 1330 }; 1331 1332 static struct { 1333 const char *path; 1334 const char *data; 1335 } match_node_tests[] = { 1336 { .path = "/testcase-data/match-node/name0", .data = "A", }, 1337 { .path = "/testcase-data/match-node/name1", .data = "B", }, 1338 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, 1339 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, 1340 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, 1341 { .path = "/testcase-data/match-node/name3", .data = "E", }, 1342 { .path = "/testcase-data/match-node/name4", .data = "G", }, 1343 { .path = "/testcase-data/match-node/name5", .data = "H", }, 1344 { .path = "/testcase-data/match-node/name6", .data = "G", }, 1345 { .path = "/testcase-data/match-node/name7", .data = "I", }, 1346 { .path = "/testcase-data/match-node/name8", .data = "J", }, 1347 { .path = "/testcase-data/match-node/name9", .data = "K", }, 1348 }; 1349 1350 static void __init of_unittest_match_node(void) 1351 { 1352 struct device_node *np; 1353 const struct of_device_id *match; 1354 int i; 1355 1356 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { 1357 np = of_find_node_by_path(match_node_tests[i].path); 1358 if (!np) { 1359 unittest(0, "missing testcase node %s\n", 1360 match_node_tests[i].path); 1361 continue; 1362 } 1363 1364 match = of_match_node(match_node_table, np); 1365 if (!match) { 1366 unittest(0, "%s didn't match anything\n", 1367 match_node_tests[i].path); 1368 continue; 1369 } 1370 1371 if (strcmp(match->data, match_node_tests[i].data) != 0) { 1372 unittest(0, "%s got wrong match. expected %s, got %s\n", 1373 match_node_tests[i].path, match_node_tests[i].data, 1374 (const char *)match->data); 1375 continue; 1376 } 1377 unittest(1, "passed"); 1378 } 1379 } 1380 1381 static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2); 1382 static const struct platform_device_info test_bus_info = { 1383 .name = "unittest-bus", 1384 }; 1385 static void __init of_unittest_platform_populate(void) 1386 { 1387 int irq, rc; 1388 struct device_node *np, *child, *grandchild; 1389 struct platform_device *pdev, *test_bus; 1390 const struct of_device_id match[] = { 1391 { .compatible = "test-device", }, 1392 {} 1393 }; 1394 1395 np = of_find_node_by_path("/testcase-data"); 1396 of_platform_default_populate(np, NULL, NULL); 1397 1398 /* Test that a missing irq domain returns -EPROBE_DEFER */ 1399 np = of_find_node_by_path("/testcase-data/testcase-device1"); 1400 pdev = of_find_device_by_node(np); 1401 unittest(pdev, "device 1 creation failed\n"); 1402 1403 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) { 1404 irq = platform_get_irq(pdev, 0); 1405 unittest(irq == -EPROBE_DEFER, 1406 "device deferred probe failed - %d\n", irq); 1407 1408 /* Test that a parsing failure does not return -EPROBE_DEFER */ 1409 np = of_find_node_by_path("/testcase-data/testcase-device2"); 1410 pdev = of_find_device_by_node(np); 1411 unittest(pdev, "device 2 creation failed\n"); 1412 1413 EXPECT_BEGIN(KERN_INFO, 1414 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found"); 1415 1416 irq = platform_get_irq(pdev, 0); 1417 1418 EXPECT_END(KERN_INFO, 1419 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found"); 1420 1421 unittest(irq < 0 && irq != -EPROBE_DEFER, 1422 "device parsing error failed - %d\n", irq); 1423 } 1424 1425 np = of_find_node_by_path("/testcase-data/platform-tests"); 1426 unittest(np, "No testcase data in device tree\n"); 1427 if (!np) 1428 return; 1429 1430 test_bus = platform_device_register_full(&test_bus_info); 1431 rc = PTR_ERR_OR_ZERO(test_bus); 1432 unittest(!rc, "testbus registration failed; rc=%i\n", rc); 1433 if (rc) { 1434 of_node_put(np); 1435 return; 1436 } 1437 test_bus->dev.of_node = np; 1438 1439 /* 1440 * Add a dummy resource to the test bus node after it is 1441 * registered to catch problems with un-inserted resources. The 1442 * DT code doesn't insert the resources, and it has caused the 1443 * kernel to oops in the past. This makes sure the same bug 1444 * doesn't crop up again. 1445 */ 1446 platform_device_add_resources(test_bus, &test_bus_res, 1); 1447 1448 of_platform_populate(np, match, NULL, &test_bus->dev); 1449 for_each_child_of_node(np, child) { 1450 for_each_child_of_node(child, grandchild) { 1451 pdev = of_find_device_by_node(grandchild); 1452 unittest(pdev, 1453 "Could not create device for node '%pOFn'\n", 1454 grandchild); 1455 platform_device_put(pdev); 1456 } 1457 } 1458 1459 of_platform_depopulate(&test_bus->dev); 1460 for_each_child_of_node(np, child) { 1461 for_each_child_of_node(child, grandchild) 1462 unittest(!of_find_device_by_node(grandchild), 1463 "device didn't get destroyed '%pOFn'\n", 1464 grandchild); 1465 } 1466 1467 platform_device_unregister(test_bus); 1468 of_node_put(np); 1469 } 1470 1471 /** 1472 * update_node_properties - adds the properties 1473 * of np into dup node (present in live tree) and 1474 * updates parent of children of np to dup. 1475 * 1476 * @np: node whose properties are being added to the live tree 1477 * @dup: node present in live tree to be updated 1478 */ 1479 static void update_node_properties(struct device_node *np, 1480 struct device_node *dup) 1481 { 1482 struct property *prop; 1483 struct property *save_next; 1484 struct device_node *child; 1485 int ret; 1486 1487 for_each_child_of_node(np, child) 1488 child->parent = dup; 1489 1490 /* 1491 * "unittest internal error: unable to add testdata property" 1492 * 1493 * If this message reports a property in node '/__symbols__' then 1494 * the respective unittest overlay contains a label that has the 1495 * same name as a label in the live devicetree. The label will 1496 * be in the live devicetree only if the devicetree source was 1497 * compiled with the '-@' option. If you encounter this error, 1498 * please consider renaming __all__ of the labels in the unittest 1499 * overlay dts files with an odd prefix that is unlikely to be 1500 * used in a real devicetree. 1501 */ 1502 1503 /* 1504 * open code for_each_property_of_node() because of_add_property() 1505 * sets prop->next to NULL 1506 */ 1507 for (prop = np->properties; prop != NULL; prop = save_next) { 1508 save_next = prop->next; 1509 ret = of_add_property(dup, prop); 1510 if (ret) { 1511 if (ret == -EEXIST && !strcmp(prop->name, "name")) 1512 continue; 1513 pr_err("unittest internal error: unable to add testdata property %pOF/%s", 1514 np, prop->name); 1515 } 1516 } 1517 } 1518 1519 /** 1520 * attach_node_and_children - attaches nodes 1521 * and its children to live tree. 1522 * CAUTION: misleading function name - if node @np already exists in 1523 * the live tree then children of @np are *not* attached to the live 1524 * tree. This works for the current test devicetree nodes because such 1525 * nodes do not have child nodes. 1526 * 1527 * @np: Node to attach to live tree 1528 */ 1529 static void attach_node_and_children(struct device_node *np) 1530 { 1531 struct device_node *next, *dup, *child; 1532 unsigned long flags; 1533 const char *full_name; 1534 1535 full_name = kasprintf(GFP_KERNEL, "%pOF", np); 1536 1537 if (!strcmp(full_name, "/__local_fixups__") || 1538 !strcmp(full_name, "/__fixups__")) { 1539 kfree(full_name); 1540 return; 1541 } 1542 1543 dup = of_find_node_by_path(full_name); 1544 kfree(full_name); 1545 if (dup) { 1546 update_node_properties(np, dup); 1547 return; 1548 } 1549 1550 child = np->child; 1551 np->child = NULL; 1552 1553 mutex_lock(&of_mutex); 1554 raw_spin_lock_irqsave(&devtree_lock, flags); 1555 np->sibling = np->parent->child; 1556 np->parent->child = np; 1557 of_node_clear_flag(np, OF_DETACHED); 1558 raw_spin_unlock_irqrestore(&devtree_lock, flags); 1559 1560 __of_attach_node_sysfs(np); 1561 mutex_unlock(&of_mutex); 1562 1563 while (child) { 1564 next = child->sibling; 1565 attach_node_and_children(child); 1566 child = next; 1567 } 1568 } 1569 1570 /** 1571 * unittest_data_add - Reads, copies data from 1572 * linked tree and attaches it to the live tree 1573 */ 1574 static int __init unittest_data_add(void) 1575 { 1576 void *unittest_data; 1577 void *unittest_data_align; 1578 struct device_node *unittest_data_node = NULL, *np; 1579 /* 1580 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically 1581 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 1582 */ 1583 extern uint8_t __dtbo_testcases_begin[]; 1584 extern uint8_t __dtbo_testcases_end[]; 1585 const int size = __dtbo_testcases_end - __dtbo_testcases_begin; 1586 int rc; 1587 void *ret; 1588 1589 if (!size) { 1590 pr_warn("%s: testcases is empty\n", __func__); 1591 return -ENODATA; 1592 } 1593 1594 /* creating copy */ 1595 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL); 1596 if (!unittest_data) 1597 return -ENOMEM; 1598 1599 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE); 1600 memcpy(unittest_data_align, __dtbo_testcases_begin, size); 1601 1602 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node); 1603 if (!ret) { 1604 pr_warn("%s: unflatten testcases tree failed\n", __func__); 1605 kfree(unittest_data); 1606 return -ENODATA; 1607 } 1608 if (!unittest_data_node) { 1609 pr_warn("%s: testcases tree is empty\n", __func__); 1610 kfree(unittest_data); 1611 return -ENODATA; 1612 } 1613 1614 /* 1615 * This lock normally encloses of_resolve_phandles() 1616 */ 1617 of_overlay_mutex_lock(); 1618 1619 rc = of_resolve_phandles(unittest_data_node); 1620 if (rc) { 1621 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 1622 of_overlay_mutex_unlock(); 1623 return -EINVAL; 1624 } 1625 1626 if (!of_root) { 1627 of_root = unittest_data_node; 1628 for_each_of_allnodes(np) 1629 __of_attach_node_sysfs(np); 1630 of_aliases = of_find_node_by_path("/aliases"); 1631 of_chosen = of_find_node_by_path("/chosen"); 1632 of_overlay_mutex_unlock(); 1633 return 0; 1634 } 1635 1636 EXPECT_BEGIN(KERN_INFO, 1637 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1638 1639 /* attach the sub-tree to live tree */ 1640 np = unittest_data_node->child; 1641 while (np) { 1642 struct device_node *next = np->sibling; 1643 1644 np->parent = of_root; 1645 /* this will clear OF_DETACHED in np and children */ 1646 attach_node_and_children(np); 1647 np = next; 1648 } 1649 1650 EXPECT_END(KERN_INFO, 1651 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1652 1653 of_overlay_mutex_unlock(); 1654 1655 return 0; 1656 } 1657 1658 #ifdef CONFIG_OF_OVERLAY 1659 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id); 1660 1661 static int unittest_probe(struct platform_device *pdev) 1662 { 1663 struct device *dev = &pdev->dev; 1664 struct device_node *np = dev->of_node; 1665 1666 if (np == NULL) { 1667 dev_err(dev, "No OF data for device\n"); 1668 return -EINVAL; 1669 1670 } 1671 1672 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1673 1674 of_platform_populate(np, NULL, NULL, &pdev->dev); 1675 1676 return 0; 1677 } 1678 1679 static void unittest_remove(struct platform_device *pdev) 1680 { 1681 struct device *dev = &pdev->dev; 1682 struct device_node *np = dev->of_node; 1683 1684 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1685 } 1686 1687 static const struct of_device_id unittest_match[] = { 1688 { .compatible = "unittest", }, 1689 {}, 1690 }; 1691 1692 static struct platform_driver unittest_driver = { 1693 .probe = unittest_probe, 1694 .remove_new = unittest_remove, 1695 .driver = { 1696 .name = "unittest", 1697 .of_match_table = of_match_ptr(unittest_match), 1698 }, 1699 }; 1700 1701 /* get the platform device instantiated at the path */ 1702 static struct platform_device *of_path_to_platform_device(const char *path) 1703 { 1704 struct device_node *np; 1705 struct platform_device *pdev; 1706 1707 np = of_find_node_by_path(path); 1708 if (np == NULL) 1709 return NULL; 1710 1711 pdev = of_find_device_by_node(np); 1712 of_node_put(np); 1713 1714 return pdev; 1715 } 1716 1717 /* find out if a platform device exists at that path */ 1718 static int of_path_platform_device_exists(const char *path) 1719 { 1720 struct platform_device *pdev; 1721 1722 pdev = of_path_to_platform_device(path); 1723 platform_device_put(pdev); 1724 return pdev != NULL; 1725 } 1726 1727 #ifdef CONFIG_OF_GPIO 1728 1729 struct unittest_gpio_dev { 1730 struct gpio_chip chip; 1731 }; 1732 1733 static int unittest_gpio_chip_request_count; 1734 static int unittest_gpio_probe_count; 1735 static int unittest_gpio_probe_pass_count; 1736 1737 static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset) 1738 { 1739 unittest_gpio_chip_request_count++; 1740 1741 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset, 1742 unittest_gpio_chip_request_count); 1743 return 0; 1744 } 1745 1746 static int unittest_gpio_probe(struct platform_device *pdev) 1747 { 1748 struct unittest_gpio_dev *devptr; 1749 int ret; 1750 1751 unittest_gpio_probe_count++; 1752 1753 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL); 1754 if (!devptr) 1755 return -ENOMEM; 1756 1757 platform_set_drvdata(pdev, devptr); 1758 1759 devptr->chip.fwnode = dev_fwnode(&pdev->dev); 1760 devptr->chip.label = "of-unittest-gpio"; 1761 devptr->chip.base = -1; /* dynamic allocation */ 1762 devptr->chip.ngpio = 5; 1763 devptr->chip.request = unittest_gpio_chip_request; 1764 1765 ret = gpiochip_add_data(&devptr->chip, NULL); 1766 1767 unittest(!ret, 1768 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret); 1769 1770 if (!ret) 1771 unittest_gpio_probe_pass_count++; 1772 return ret; 1773 } 1774 1775 static void unittest_gpio_remove(struct platform_device *pdev) 1776 { 1777 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev); 1778 struct device *dev = &pdev->dev; 1779 1780 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode); 1781 1782 if (devptr->chip.base != -1) 1783 gpiochip_remove(&devptr->chip); 1784 1785 kfree(devptr); 1786 } 1787 1788 static const struct of_device_id unittest_gpio_id[] = { 1789 { .compatible = "unittest-gpio", }, 1790 {} 1791 }; 1792 1793 static struct platform_driver unittest_gpio_driver = { 1794 .probe = unittest_gpio_probe, 1795 .remove_new = unittest_gpio_remove, 1796 .driver = { 1797 .name = "unittest-gpio", 1798 .of_match_table = of_match_ptr(unittest_gpio_id), 1799 }, 1800 }; 1801 1802 static void __init of_unittest_overlay_gpio(void) 1803 { 1804 int chip_request_count; 1805 int probe_pass_count; 1806 int ret; 1807 1808 /* 1809 * tests: apply overlays before registering driver 1810 * Similar to installing a driver as a module, the 1811 * driver is registered after applying the overlays. 1812 * 1813 * The overlays are applied by overlay_data_apply() 1814 * instead of of_unittest_apply_overlay() so that they 1815 * will not be tracked. Thus they will not be removed 1816 * by of_unittest_remove_tracked_overlays(). 1817 * 1818 * - apply overlay_gpio_01 1819 * - apply overlay_gpio_02a 1820 * - apply overlay_gpio_02b 1821 * - register driver 1822 * 1823 * register driver will result in 1824 * - probe and processing gpio hog for overlay_gpio_01 1825 * - probe for overlay_gpio_02a 1826 * - processing gpio for overlay_gpio_02b 1827 */ 1828 1829 probe_pass_count = unittest_gpio_probe_pass_count; 1830 chip_request_count = unittest_gpio_chip_request_count; 1831 1832 /* 1833 * overlay_gpio_01 contains gpio node and child gpio hog node 1834 * overlay_gpio_02a contains gpio node 1835 * overlay_gpio_02b contains child gpio hog node 1836 */ 1837 1838 unittest(overlay_data_apply("overlay_gpio_01", NULL), 1839 "Adding overlay 'overlay_gpio_01' failed\n"); 1840 1841 unittest(overlay_data_apply("overlay_gpio_02a", NULL), 1842 "Adding overlay 'overlay_gpio_02a' failed\n"); 1843 1844 unittest(overlay_data_apply("overlay_gpio_02b", NULL), 1845 "Adding overlay 'overlay_gpio_02b' failed\n"); 1846 1847 ret = platform_driver_register(&unittest_gpio_driver); 1848 if (unittest(ret == 0, "could not register unittest gpio driver\n")) 1849 return; 1850 1851 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count, 1852 "unittest_gpio_probe() failed or not called\n"); 1853 1854 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count, 1855 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1856 unittest_gpio_chip_request_count - chip_request_count); 1857 1858 /* 1859 * tests: apply overlays after registering driver 1860 * 1861 * Similar to a driver built-in to the kernel, the 1862 * driver is registered before applying the overlays. 1863 * 1864 * overlay_gpio_03 contains gpio node and child gpio hog node 1865 * 1866 * - apply overlay_gpio_03 1867 * 1868 * apply overlay will result in 1869 * - probe and processing gpio hog. 1870 */ 1871 1872 probe_pass_count = unittest_gpio_probe_pass_count; 1873 chip_request_count = unittest_gpio_chip_request_count; 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 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1881 "unittest_gpio_probe() failed or not called\n"); 1882 1883 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1884 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1885 unittest_gpio_chip_request_count - chip_request_count); 1886 1887 /* 1888 * overlay_gpio_04a contains gpio node 1889 * 1890 * - apply overlay_gpio_04a 1891 * 1892 * apply the overlay will result in 1893 * - probe for overlay_gpio_04a 1894 */ 1895 1896 probe_pass_count = unittest_gpio_probe_pass_count; 1897 chip_request_count = unittest_gpio_chip_request_count; 1898 1899 /* overlay_gpio_04a contains gpio node */ 1900 1901 unittest(overlay_data_apply("overlay_gpio_04a", NULL), 1902 "Adding overlay 'overlay_gpio_04a' failed\n"); 1903 1904 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1905 "unittest_gpio_probe() failed or not called\n"); 1906 1907 /* 1908 * overlay_gpio_04b contains child gpio hog node 1909 * 1910 * - apply overlay_gpio_04b 1911 * 1912 * apply the overlay will result in 1913 * - processing gpio for overlay_gpio_04b 1914 */ 1915 1916 /* overlay_gpio_04b contains child gpio hog node */ 1917 1918 unittest(overlay_data_apply("overlay_gpio_04b", NULL), 1919 "Adding overlay 'overlay_gpio_04b' failed\n"); 1920 1921 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1922 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1923 unittest_gpio_chip_request_count - chip_request_count); 1924 } 1925 1926 #else 1927 1928 static void __init of_unittest_overlay_gpio(void) 1929 { 1930 /* skip tests */ 1931 } 1932 1933 #endif 1934 1935 #if IS_BUILTIN(CONFIG_I2C) 1936 1937 /* get the i2c client device instantiated at the path */ 1938 static struct i2c_client *of_path_to_i2c_client(const char *path) 1939 { 1940 struct device_node *np; 1941 struct i2c_client *client; 1942 1943 np = of_find_node_by_path(path); 1944 if (np == NULL) 1945 return NULL; 1946 1947 client = of_find_i2c_device_by_node(np); 1948 of_node_put(np); 1949 1950 return client; 1951 } 1952 1953 /* find out if a i2c client device exists at that path */ 1954 static int of_path_i2c_client_exists(const char *path) 1955 { 1956 struct i2c_client *client; 1957 1958 client = of_path_to_i2c_client(path); 1959 if (client) 1960 put_device(&client->dev); 1961 return client != NULL; 1962 } 1963 #else 1964 static int of_path_i2c_client_exists(const char *path) 1965 { 1966 return 0; 1967 } 1968 #endif 1969 1970 enum overlay_type { 1971 PDEV_OVERLAY, 1972 I2C_OVERLAY 1973 }; 1974 1975 static int of_path_device_type_exists(const char *path, 1976 enum overlay_type ovtype) 1977 { 1978 switch (ovtype) { 1979 case PDEV_OVERLAY: 1980 return of_path_platform_device_exists(path); 1981 case I2C_OVERLAY: 1982 return of_path_i2c_client_exists(path); 1983 } 1984 return 0; 1985 } 1986 1987 static const char *unittest_path(int nr, enum overlay_type ovtype) 1988 { 1989 const char *base; 1990 static char buf[256]; 1991 1992 switch (ovtype) { 1993 case PDEV_OVERLAY: 1994 base = "/testcase-data/overlay-node/test-bus"; 1995 break; 1996 case I2C_OVERLAY: 1997 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 1998 break; 1999 default: 2000 buf[0] = '\0'; 2001 return buf; 2002 } 2003 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 2004 buf[sizeof(buf) - 1] = '\0'; 2005 return buf; 2006 } 2007 2008 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 2009 { 2010 const char *path; 2011 2012 path = unittest_path(unittest_nr, ovtype); 2013 2014 switch (ovtype) { 2015 case PDEV_OVERLAY: 2016 return of_path_platform_device_exists(path); 2017 case I2C_OVERLAY: 2018 return of_path_i2c_client_exists(path); 2019 } 2020 return 0; 2021 } 2022 2023 static const char *overlay_name_from_nr(int nr) 2024 { 2025 static char buf[256]; 2026 2027 snprintf(buf, sizeof(buf) - 1, 2028 "overlay_%d", nr); 2029 buf[sizeof(buf) - 1] = '\0'; 2030 2031 return buf; 2032 } 2033 2034 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 2035 2036 #define MAX_TRACK_OVCS_IDS 256 2037 2038 static int track_ovcs_id[MAX_TRACK_OVCS_IDS]; 2039 static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS]; 2040 static int track_ovcs_id_cnt; 2041 2042 static void of_unittest_track_overlay(int ovcs_id, int overlay_nr) 2043 { 2044 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS)) 2045 return; 2046 2047 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id; 2048 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr; 2049 track_ovcs_id_cnt++; 2050 } 2051 2052 static void of_unittest_untrack_overlay(int ovcs_id) 2053 { 2054 if (WARN_ON(track_ovcs_id_cnt < 1)) 2055 return; 2056 2057 track_ovcs_id_cnt--; 2058 2059 /* If out of synch then test is broken. Do not try to recover. */ 2060 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id); 2061 } 2062 2063 static void of_unittest_remove_tracked_overlays(void) 2064 { 2065 int ret, ovcs_id, overlay_nr, save_ovcs_id; 2066 const char *overlay_name; 2067 2068 while (track_ovcs_id_cnt > 0) { 2069 2070 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1]; 2071 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1]; 2072 save_ovcs_id = ovcs_id; 2073 ret = of_overlay_remove(&ovcs_id); 2074 if (ret == -ENODEV) { 2075 overlay_name = overlay_name_from_nr(overlay_nr); 2076 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n", 2077 __func__, overlay_name, ret); 2078 } 2079 of_unittest_untrack_overlay(save_ovcs_id); 2080 } 2081 2082 } 2083 2084 static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id) 2085 { 2086 /* 2087 * The overlay will be tracked, thus it will be removed 2088 * by of_unittest_remove_tracked_overlays(). 2089 */ 2090 2091 const char *overlay_name; 2092 2093 overlay_name = overlay_name_from_nr(overlay_nr); 2094 2095 if (!overlay_data_apply(overlay_name, ovcs_id)) { 2096 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2097 return -EFAULT; 2098 } 2099 of_unittest_track_overlay(*ovcs_id, overlay_nr); 2100 2101 return 0; 2102 } 2103 2104 /* apply an overlay while checking before and after states */ 2105 static int __init of_unittest_apply_overlay_check(int overlay_nr, 2106 int unittest_nr, int before, int after, 2107 enum overlay_type ovtype) 2108 { 2109 int ret, ovcs_id; 2110 2111 /* unittest device must not be in before state */ 2112 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2113 unittest(0, "%s with device @\"%s\" %s\n", 2114 overlay_name_from_nr(overlay_nr), 2115 unittest_path(unittest_nr, ovtype), 2116 !before ? "enabled" : "disabled"); 2117 return -EINVAL; 2118 } 2119 2120 ovcs_id = 0; 2121 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2122 if (ret != 0) { 2123 /* of_unittest_apply_overlay already called unittest() */ 2124 return ret; 2125 } 2126 2127 /* unittest device must be to set to after state */ 2128 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2129 unittest(0, "%s failed to create @\"%s\" %s\n", 2130 overlay_name_from_nr(overlay_nr), 2131 unittest_path(unittest_nr, ovtype), 2132 !after ? "enabled" : "disabled"); 2133 return -EINVAL; 2134 } 2135 2136 return 0; 2137 } 2138 2139 /* apply an overlay and then revert it while checking before, after states */ 2140 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, 2141 int unittest_nr, int before, int after, 2142 enum overlay_type ovtype) 2143 { 2144 int ret, ovcs_id, save_ovcs_id; 2145 2146 /* unittest device must be in before state */ 2147 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2148 unittest(0, "%s with device @\"%s\" %s\n", 2149 overlay_name_from_nr(overlay_nr), 2150 unittest_path(unittest_nr, ovtype), 2151 !before ? "enabled" : "disabled"); 2152 return -EINVAL; 2153 } 2154 2155 /* apply the overlay */ 2156 ovcs_id = 0; 2157 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2158 if (ret != 0) { 2159 /* of_unittest_apply_overlay already called unittest() */ 2160 return ret; 2161 } 2162 2163 /* unittest device must be in after state */ 2164 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2165 unittest(0, "%s failed to create @\"%s\" %s\n", 2166 overlay_name_from_nr(overlay_nr), 2167 unittest_path(unittest_nr, ovtype), 2168 !after ? "enabled" : "disabled"); 2169 return -EINVAL; 2170 } 2171 2172 save_ovcs_id = ovcs_id; 2173 ret = of_overlay_remove(&ovcs_id); 2174 if (ret != 0) { 2175 unittest(0, "%s failed to be destroyed @\"%s\"\n", 2176 overlay_name_from_nr(overlay_nr), 2177 unittest_path(unittest_nr, ovtype)); 2178 return ret; 2179 } 2180 of_unittest_untrack_overlay(save_ovcs_id); 2181 2182 /* unittest device must be again in before state */ 2183 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 2184 unittest(0, "%s with device @\"%s\" %s\n", 2185 overlay_name_from_nr(overlay_nr), 2186 unittest_path(unittest_nr, ovtype), 2187 !before ? "enabled" : "disabled"); 2188 return -EINVAL; 2189 } 2190 2191 return 0; 2192 } 2193 2194 /* test activation of device */ 2195 static void __init of_unittest_overlay_0(void) 2196 { 2197 int ret; 2198 2199 EXPECT_BEGIN(KERN_INFO, 2200 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2201 2202 /* device should enable */ 2203 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); 2204 2205 EXPECT_END(KERN_INFO, 2206 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2207 2208 if (ret) 2209 return; 2210 2211 unittest(1, "overlay test %d passed\n", 0); 2212 } 2213 2214 /* test deactivation of device */ 2215 static void __init of_unittest_overlay_1(void) 2216 { 2217 int ret; 2218 2219 EXPECT_BEGIN(KERN_INFO, 2220 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2221 2222 /* device should disable */ 2223 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); 2224 2225 EXPECT_END(KERN_INFO, 2226 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2227 2228 if (ret) 2229 return; 2230 2231 unittest(1, "overlay test %d passed\n", 1); 2232 2233 } 2234 2235 /* test activation of device */ 2236 static void __init of_unittest_overlay_2(void) 2237 { 2238 int ret; 2239 2240 EXPECT_BEGIN(KERN_INFO, 2241 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2242 2243 /* device should enable */ 2244 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); 2245 2246 EXPECT_END(KERN_INFO, 2247 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2248 2249 if (ret) 2250 return; 2251 unittest(1, "overlay test %d passed\n", 2); 2252 } 2253 2254 /* test deactivation of device */ 2255 static void __init of_unittest_overlay_3(void) 2256 { 2257 int ret; 2258 2259 EXPECT_BEGIN(KERN_INFO, 2260 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2261 2262 /* device should disable */ 2263 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); 2264 2265 EXPECT_END(KERN_INFO, 2266 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2267 2268 if (ret) 2269 return; 2270 2271 unittest(1, "overlay test %d passed\n", 3); 2272 } 2273 2274 /* test activation of a full device node */ 2275 static void __init of_unittest_overlay_4(void) 2276 { 2277 /* device should disable */ 2278 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY)) 2279 return; 2280 2281 unittest(1, "overlay test %d passed\n", 4); 2282 } 2283 2284 /* test overlay apply/revert sequence */ 2285 static void __init of_unittest_overlay_5(void) 2286 { 2287 int ret; 2288 2289 EXPECT_BEGIN(KERN_INFO, 2290 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2291 2292 /* device should disable */ 2293 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); 2294 2295 EXPECT_END(KERN_INFO, 2296 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2297 2298 if (ret) 2299 return; 2300 2301 unittest(1, "overlay test %d passed\n", 5); 2302 } 2303 2304 /* test overlay application in sequence */ 2305 static void __init of_unittest_overlay_6(void) 2306 { 2307 int i, save_ovcs_id[2], ovcs_id; 2308 int overlay_nr = 6, unittest_nr = 6; 2309 int before = 0, after = 1; 2310 const char *overlay_name; 2311 2312 int ret; 2313 2314 /* unittest device must be in before state */ 2315 for (i = 0; i < 2; i++) { 2316 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2317 != before) { 2318 unittest(0, "%s with device @\"%s\" %s\n", 2319 overlay_name_from_nr(overlay_nr + i), 2320 unittest_path(unittest_nr + i, 2321 PDEV_OVERLAY), 2322 !before ? "enabled" : "disabled"); 2323 return; 2324 } 2325 } 2326 2327 /* apply the overlays */ 2328 2329 EXPECT_BEGIN(KERN_INFO, 2330 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2331 2332 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2333 2334 ret = overlay_data_apply(overlay_name, &ovcs_id); 2335 2336 if (!ret) { 2337 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2338 return; 2339 } 2340 save_ovcs_id[0] = ovcs_id; 2341 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2342 2343 EXPECT_END(KERN_INFO, 2344 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2345 2346 EXPECT_BEGIN(KERN_INFO, 2347 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2348 2349 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2350 2351 ret = overlay_data_apply(overlay_name, &ovcs_id); 2352 2353 if (!ret) { 2354 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2355 return; 2356 } 2357 save_ovcs_id[1] = ovcs_id; 2358 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2359 2360 EXPECT_END(KERN_INFO, 2361 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2362 2363 2364 for (i = 0; i < 2; i++) { 2365 /* unittest device must be in after state */ 2366 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2367 != after) { 2368 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 2369 overlay_name_from_nr(overlay_nr + i), 2370 unittest_path(unittest_nr + i, 2371 PDEV_OVERLAY), 2372 !after ? "enabled" : "disabled"); 2373 return; 2374 } 2375 } 2376 2377 for (i = 1; i >= 0; i--) { 2378 ovcs_id = save_ovcs_id[i]; 2379 if (of_overlay_remove(&ovcs_id)) { 2380 unittest(0, "%s failed destroy @\"%s\"\n", 2381 overlay_name_from_nr(overlay_nr + i), 2382 unittest_path(unittest_nr + i, 2383 PDEV_OVERLAY)); 2384 return; 2385 } 2386 of_unittest_untrack_overlay(save_ovcs_id[i]); 2387 } 2388 2389 for (i = 0; i < 2; i++) { 2390 /* unittest device must be again in before state */ 2391 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2392 != before) { 2393 unittest(0, "%s with device @\"%s\" %s\n", 2394 overlay_name_from_nr(overlay_nr + i), 2395 unittest_path(unittest_nr + i, 2396 PDEV_OVERLAY), 2397 !before ? "enabled" : "disabled"); 2398 return; 2399 } 2400 } 2401 2402 unittest(1, "overlay test %d passed\n", 6); 2403 2404 } 2405 2406 /* test overlay application in sequence */ 2407 static void __init of_unittest_overlay_8(void) 2408 { 2409 int i, save_ovcs_id[2], ovcs_id; 2410 int overlay_nr = 8, unittest_nr = 8; 2411 const char *overlay_name; 2412 int ret; 2413 2414 /* we don't care about device state in this test */ 2415 2416 EXPECT_BEGIN(KERN_INFO, 2417 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status"); 2418 2419 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2420 2421 ret = overlay_data_apply(overlay_name, &ovcs_id); 2422 if (!ret) 2423 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2424 2425 EXPECT_END(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 if (!ret) 2429 return; 2430 2431 save_ovcs_id[0] = ovcs_id; 2432 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2433 2434 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2435 2436 EXPECT_BEGIN(KERN_INFO, 2437 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2438 2439 /* apply the overlays */ 2440 ret = overlay_data_apply(overlay_name, &ovcs_id); 2441 2442 EXPECT_END(KERN_INFO, 2443 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2444 2445 if (!ret) { 2446 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2447 return; 2448 } 2449 2450 save_ovcs_id[1] = ovcs_id; 2451 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2452 2453 /* now try to remove first overlay (it should fail) */ 2454 ovcs_id = save_ovcs_id[0]; 2455 2456 EXPECT_BEGIN(KERN_INFO, 2457 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2458 2459 EXPECT_BEGIN(KERN_INFO, 2460 "OF: overlay: overlay #6 is not topmost"); 2461 2462 ret = of_overlay_remove(&ovcs_id); 2463 2464 EXPECT_END(KERN_INFO, 2465 "OF: overlay: overlay #6 is not topmost"); 2466 2467 EXPECT_END(KERN_INFO, 2468 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2469 2470 if (!ret) { 2471 /* 2472 * Should never get here. If we do, expect a lot of 2473 * subsequent tracking and overlay removal related errors. 2474 */ 2475 unittest(0, "%s was destroyed @\"%s\"\n", 2476 overlay_name_from_nr(overlay_nr + 0), 2477 unittest_path(unittest_nr, 2478 PDEV_OVERLAY)); 2479 return; 2480 } 2481 2482 /* removing them in order should work */ 2483 for (i = 1; i >= 0; i--) { 2484 ovcs_id = save_ovcs_id[i]; 2485 if (of_overlay_remove(&ovcs_id)) { 2486 unittest(0, "%s not destroyed @\"%s\"\n", 2487 overlay_name_from_nr(overlay_nr + i), 2488 unittest_path(unittest_nr, 2489 PDEV_OVERLAY)); 2490 return; 2491 } 2492 of_unittest_untrack_overlay(save_ovcs_id[i]); 2493 } 2494 2495 unittest(1, "overlay test %d passed\n", 8); 2496 } 2497 2498 /* test insertion of a bus with parent devices */ 2499 static void __init of_unittest_overlay_10(void) 2500 { 2501 int ret; 2502 char *child_path; 2503 2504 /* device should disable */ 2505 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 2506 2507 if (unittest(ret == 0, 2508 "overlay test %d failed; overlay application\n", 10)) 2509 return; 2510 2511 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 2512 unittest_path(10, PDEV_OVERLAY)); 2513 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 2514 return; 2515 2516 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 2517 kfree(child_path); 2518 2519 unittest(ret, "overlay test %d failed; no child device\n", 10); 2520 } 2521 2522 /* test insertion of a bus with parent devices (and revert) */ 2523 static void __init of_unittest_overlay_11(void) 2524 { 2525 int ret; 2526 2527 /* device should disable */ 2528 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 2529 PDEV_OVERLAY); 2530 2531 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11); 2532 } 2533 2534 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 2535 2536 struct unittest_i2c_bus_data { 2537 struct platform_device *pdev; 2538 struct i2c_adapter adap; 2539 }; 2540 2541 static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 2542 struct i2c_msg *msgs, int num) 2543 { 2544 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 2545 2546 (void)std; 2547 2548 return num; 2549 } 2550 2551 static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 2552 { 2553 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 2554 } 2555 2556 static const struct i2c_algorithm unittest_i2c_algo = { 2557 .master_xfer = unittest_i2c_master_xfer, 2558 .functionality = unittest_i2c_functionality, 2559 }; 2560 2561 static int unittest_i2c_bus_probe(struct platform_device *pdev) 2562 { 2563 struct device *dev = &pdev->dev; 2564 struct device_node *np = dev->of_node; 2565 struct unittest_i2c_bus_data *std; 2566 struct i2c_adapter *adap; 2567 int ret; 2568 2569 if (np == NULL) { 2570 dev_err(dev, "No OF data for device\n"); 2571 return -EINVAL; 2572 2573 } 2574 2575 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2576 2577 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 2578 if (!std) 2579 return -ENOMEM; 2580 2581 /* link them together */ 2582 std->pdev = pdev; 2583 platform_set_drvdata(pdev, std); 2584 2585 adap = &std->adap; 2586 i2c_set_adapdata(adap, std); 2587 adap->nr = -1; 2588 strscpy(adap->name, pdev->name, sizeof(adap->name)); 2589 adap->class = I2C_CLASS_DEPRECATED; 2590 adap->algo = &unittest_i2c_algo; 2591 adap->dev.parent = dev; 2592 adap->dev.of_node = dev->of_node; 2593 adap->timeout = 5 * HZ; 2594 adap->retries = 3; 2595 2596 ret = i2c_add_numbered_adapter(adap); 2597 if (ret != 0) { 2598 dev_err(dev, "Failed to add I2C adapter\n"); 2599 return ret; 2600 } 2601 2602 return 0; 2603 } 2604 2605 static void unittest_i2c_bus_remove(struct platform_device *pdev) 2606 { 2607 struct device *dev = &pdev->dev; 2608 struct device_node *np = dev->of_node; 2609 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 2610 2611 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2612 i2c_del_adapter(&std->adap); 2613 } 2614 2615 static const struct of_device_id unittest_i2c_bus_match[] = { 2616 { .compatible = "unittest-i2c-bus", }, 2617 {}, 2618 }; 2619 2620 static struct platform_driver unittest_i2c_bus_driver = { 2621 .probe = unittest_i2c_bus_probe, 2622 .remove_new = unittest_i2c_bus_remove, 2623 .driver = { 2624 .name = "unittest-i2c-bus", 2625 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 2626 }, 2627 }; 2628 2629 static int unittest_i2c_dev_probe(struct i2c_client *client) 2630 { 2631 struct device *dev = &client->dev; 2632 struct device_node *np = client->dev.of_node; 2633 2634 if (!np) { 2635 dev_err(dev, "No OF node\n"); 2636 return -EINVAL; 2637 } 2638 2639 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2640 2641 return 0; 2642 }; 2643 2644 static void unittest_i2c_dev_remove(struct i2c_client *client) 2645 { 2646 struct device *dev = &client->dev; 2647 struct device_node *np = client->dev.of_node; 2648 2649 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2650 } 2651 2652 static const struct i2c_device_id unittest_i2c_dev_id[] = { 2653 { .name = "unittest-i2c-dev" }, 2654 { } 2655 }; 2656 2657 static struct i2c_driver unittest_i2c_dev_driver = { 2658 .driver = { 2659 .name = "unittest-i2c-dev", 2660 }, 2661 .probe = unittest_i2c_dev_probe, 2662 .remove = unittest_i2c_dev_remove, 2663 .id_table = unittest_i2c_dev_id, 2664 }; 2665 2666 #if IS_BUILTIN(CONFIG_I2C_MUX) 2667 2668 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) 2669 { 2670 return 0; 2671 } 2672 2673 static int unittest_i2c_mux_probe(struct i2c_client *client) 2674 { 2675 int i, nchans; 2676 struct device *dev = &client->dev; 2677 struct i2c_adapter *adap = client->adapter; 2678 struct device_node *np = client->dev.of_node, *child; 2679 struct i2c_mux_core *muxc; 2680 u32 reg, max_reg; 2681 2682 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2683 2684 if (!np) { 2685 dev_err(dev, "No OF node\n"); 2686 return -EINVAL; 2687 } 2688 2689 max_reg = (u32)-1; 2690 for_each_child_of_node(np, child) { 2691 if (of_property_read_u32(child, "reg", ®)) 2692 continue; 2693 if (max_reg == (u32)-1 || reg > max_reg) 2694 max_reg = reg; 2695 } 2696 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 2697 if (nchans == 0) { 2698 dev_err(dev, "No channels\n"); 2699 return -EINVAL; 2700 } 2701 2702 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0, 2703 unittest_i2c_mux_select_chan, NULL); 2704 if (!muxc) 2705 return -ENOMEM; 2706 for (i = 0; i < nchans; i++) { 2707 if (i2c_mux_add_adapter(muxc, 0, i, 0)) { 2708 dev_err(dev, "Failed to register mux #%d\n", i); 2709 i2c_mux_del_adapters(muxc); 2710 return -ENODEV; 2711 } 2712 } 2713 2714 i2c_set_clientdata(client, muxc); 2715 2716 return 0; 2717 }; 2718 2719 static void unittest_i2c_mux_remove(struct i2c_client *client) 2720 { 2721 struct device *dev = &client->dev; 2722 struct device_node *np = client->dev.of_node; 2723 struct i2c_mux_core *muxc = i2c_get_clientdata(client); 2724 2725 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2726 i2c_mux_del_adapters(muxc); 2727 } 2728 2729 static const struct i2c_device_id unittest_i2c_mux_id[] = { 2730 { .name = "unittest-i2c-mux" }, 2731 { } 2732 }; 2733 2734 static struct i2c_driver unittest_i2c_mux_driver = { 2735 .driver = { 2736 .name = "unittest-i2c-mux", 2737 }, 2738 .probe = unittest_i2c_mux_probe, 2739 .remove = unittest_i2c_mux_remove, 2740 .id_table = unittest_i2c_mux_id, 2741 }; 2742 2743 #endif 2744 2745 static int of_unittest_overlay_i2c_init(void) 2746 { 2747 int ret; 2748 2749 ret = i2c_add_driver(&unittest_i2c_dev_driver); 2750 if (unittest(ret == 0, 2751 "could not register unittest i2c device driver\n")) 2752 return ret; 2753 2754 ret = platform_driver_register(&unittest_i2c_bus_driver); 2755 2756 if (unittest(ret == 0, 2757 "could not register unittest i2c bus driver\n")) 2758 return ret; 2759 2760 #if IS_BUILTIN(CONFIG_I2C_MUX) 2761 2762 EXPECT_BEGIN(KERN_INFO, 2763 "i2c i2c-1: Added multiplexed i2c bus 2"); 2764 2765 ret = i2c_add_driver(&unittest_i2c_mux_driver); 2766 2767 EXPECT_END(KERN_INFO, 2768 "i2c i2c-1: Added multiplexed i2c bus 2"); 2769 2770 if (unittest(ret == 0, 2771 "could not register unittest i2c mux driver\n")) 2772 return ret; 2773 #endif 2774 2775 return 0; 2776 } 2777 2778 static void of_unittest_overlay_i2c_cleanup(void) 2779 { 2780 #if IS_BUILTIN(CONFIG_I2C_MUX) 2781 i2c_del_driver(&unittest_i2c_mux_driver); 2782 #endif 2783 platform_driver_unregister(&unittest_i2c_bus_driver); 2784 i2c_del_driver(&unittest_i2c_dev_driver); 2785 } 2786 2787 static void __init of_unittest_overlay_i2c_12(void) 2788 { 2789 int ret; 2790 2791 /* device should enable */ 2792 EXPECT_BEGIN(KERN_INFO, 2793 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2794 2795 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); 2796 2797 EXPECT_END(KERN_INFO, 2798 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2799 2800 if (ret) 2801 return; 2802 2803 unittest(1, "overlay test %d passed\n", 12); 2804 } 2805 2806 /* test deactivation of device */ 2807 static void __init of_unittest_overlay_i2c_13(void) 2808 { 2809 int ret; 2810 2811 EXPECT_BEGIN(KERN_INFO, 2812 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2813 2814 /* device should disable */ 2815 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); 2816 2817 EXPECT_END(KERN_INFO, 2818 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2819 2820 if (ret) 2821 return; 2822 2823 unittest(1, "overlay test %d passed\n", 13); 2824 } 2825 2826 /* just check for i2c mux existence */ 2827 static void of_unittest_overlay_i2c_14(void) 2828 { 2829 } 2830 2831 static void __init of_unittest_overlay_i2c_15(void) 2832 { 2833 int ret; 2834 2835 /* device should enable */ 2836 EXPECT_BEGIN(KERN_INFO, 2837 "i2c i2c-1: Added multiplexed i2c bus 3"); 2838 2839 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY); 2840 2841 EXPECT_END(KERN_INFO, 2842 "i2c i2c-1: Added multiplexed i2c bus 3"); 2843 2844 if (ret) 2845 return; 2846 2847 unittest(1, "overlay test %d passed\n", 15); 2848 } 2849 2850 #else 2851 2852 static inline void of_unittest_overlay_i2c_14(void) { } 2853 static inline void of_unittest_overlay_i2c_15(void) { } 2854 2855 #endif 2856 2857 static int of_notify(struct notifier_block *nb, unsigned long action, 2858 void *arg) 2859 { 2860 struct of_overlay_notify_data *nd = arg; 2861 struct device_node *found; 2862 int ret; 2863 2864 /* 2865 * For overlay_16 .. overlay_19, check that returning an error 2866 * works for each of the actions by setting an arbitrary return 2867 * error number that matches the test number. e.g. for unittest16, 2868 * ret = -EBUSY which is -16. 2869 * 2870 * OVERLAY_INFO() for the overlays is declared to expect the same 2871 * error number, so overlay_data_apply() will return no error. 2872 * 2873 * overlay_20 will return NOTIFY_DONE 2874 */ 2875 2876 ret = 0; 2877 of_node_get(nd->overlay); 2878 2879 switch (action) { 2880 2881 case OF_OVERLAY_PRE_APPLY: 2882 found = of_find_node_by_name(nd->overlay, "test-unittest16"); 2883 if (found) { 2884 of_node_put(found); 2885 ret = -EBUSY; 2886 } 2887 break; 2888 2889 case OF_OVERLAY_POST_APPLY: 2890 found = of_find_node_by_name(nd->overlay, "test-unittest17"); 2891 if (found) { 2892 of_node_put(found); 2893 ret = -EEXIST; 2894 } 2895 break; 2896 2897 case OF_OVERLAY_PRE_REMOVE: 2898 found = of_find_node_by_name(nd->overlay, "test-unittest18"); 2899 if (found) { 2900 of_node_put(found); 2901 ret = -EXDEV; 2902 } 2903 break; 2904 2905 case OF_OVERLAY_POST_REMOVE: 2906 found = of_find_node_by_name(nd->overlay, "test-unittest19"); 2907 if (found) { 2908 of_node_put(found); 2909 ret = -ENODEV; 2910 } 2911 break; 2912 2913 default: /* should not happen */ 2914 of_node_put(nd->overlay); 2915 ret = -EINVAL; 2916 break; 2917 } 2918 2919 if (ret) 2920 return notifier_from_errno(ret); 2921 2922 return NOTIFY_DONE; 2923 } 2924 2925 static struct notifier_block of_nb = { 2926 .notifier_call = of_notify, 2927 }; 2928 2929 static void __init of_unittest_overlay_notify(void) 2930 { 2931 int ovcs_id; 2932 int ret; 2933 2934 ret = of_overlay_notifier_register(&of_nb); 2935 unittest(!ret, 2936 "of_overlay_notifier_register() failed, ret = %d\n", ret); 2937 if (ret) 2938 return; 2939 2940 /* 2941 * The overlays are applied by overlay_data_apply() 2942 * instead of of_unittest_apply_overlay() so that they 2943 * will not be tracked. Thus they will not be removed 2944 * by of_unittest_remove_tracked_overlays(). 2945 * 2946 * Applying overlays 16 - 19 will each trigger an error for a 2947 * different action in of_notify(). 2948 * 2949 * Applying overlay 20 will not trigger any error in of_notify(). 2950 */ 2951 2952 /* --- overlay 16 --- */ 2953 2954 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2955 2956 unittest(overlay_data_apply("overlay_16", &ovcs_id), 2957 "test OF_OVERLAY_PRE_APPLY notify injected error\n"); 2958 2959 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2960 2961 unittest(ovcs_id, "ovcs_id not created for overlay_16\n"); 2962 2963 /* --- overlay 17 --- */ 2964 2965 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2966 2967 unittest(overlay_data_apply("overlay_17", &ovcs_id), 2968 "test OF_OVERLAY_POST_APPLY notify injected error\n"); 2969 2970 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2971 2972 unittest(ovcs_id, "ovcs_id not created for overlay_17\n"); 2973 2974 if (ovcs_id) { 2975 ret = of_overlay_remove(&ovcs_id); 2976 unittest(!ret, 2977 "overlay_17 of_overlay_remove(), ret = %d\n", ret); 2978 } 2979 2980 /* --- overlay 18 --- */ 2981 2982 unittest(overlay_data_apply("overlay_18", &ovcs_id), 2983 "OF_OVERLAY_PRE_REMOVE notify injected error\n"); 2984 2985 unittest(ovcs_id, "ovcs_id not created for overlay_18\n"); 2986 2987 if (ovcs_id) { 2988 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 2989 2990 ret = of_overlay_remove(&ovcs_id); 2991 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 2992 if (ret == -EXDEV) { 2993 /* 2994 * change set ovcs_id should still exist 2995 */ 2996 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n"); 2997 } else { 2998 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n"); 2999 } 3000 } else { 3001 unittest(1, "ovcs_id not created for overlay_18\n"); 3002 } 3003 3004 unittest(ovcs_id, "ovcs_id removed for overlay_18\n"); 3005 3006 /* --- overlay 19 --- */ 3007 3008 unittest(overlay_data_apply("overlay_19", &ovcs_id), 3009 "OF_OVERLAY_POST_REMOVE notify injected error\n"); 3010 3011 unittest(ovcs_id, "ovcs_id not created for overlay_19\n"); 3012 3013 if (ovcs_id) { 3014 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3015 ret = of_overlay_remove(&ovcs_id); 3016 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3017 if (ret == -ENODEV) 3018 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n"); 3019 else 3020 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n"); 3021 } else { 3022 unittest(1, "ovcs_id removed for overlay_19\n"); 3023 } 3024 3025 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n", 3026 ovcs_id); 3027 3028 /* --- overlay 20 --- */ 3029 3030 unittest(overlay_data_apply("overlay_20", &ovcs_id), 3031 "overlay notify no injected error\n"); 3032 3033 if (ovcs_id) { 3034 ret = of_overlay_remove(&ovcs_id); 3035 if (ret) 3036 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n", 3037 ret); 3038 } else { 3039 unittest(1, "ovcs_id not created for overlay_20\n"); 3040 } 3041 3042 unittest(!of_overlay_notifier_unregister(&of_nb), 3043 "of_overlay_notifier_unregister() failed, ret = %d\n", ret); 3044 } 3045 3046 static void __init of_unittest_overlay(void) 3047 { 3048 struct device_node *bus_np = NULL; 3049 3050 if (platform_driver_register(&unittest_driver)) { 3051 unittest(0, "could not register unittest driver\n"); 3052 goto out; 3053 } 3054 3055 bus_np = of_find_node_by_path(bus_path); 3056 if (bus_np == NULL) { 3057 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 3058 goto out; 3059 } 3060 3061 if (of_platform_default_populate(bus_np, NULL, NULL)) { 3062 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 3063 goto out; 3064 } 3065 3066 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 3067 unittest(0, "could not find unittest0 @ \"%s\"\n", 3068 unittest_path(100, PDEV_OVERLAY)); 3069 goto out; 3070 } 3071 3072 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 3073 unittest(0, "unittest1 @ \"%s\" should not exist\n", 3074 unittest_path(101, PDEV_OVERLAY)); 3075 goto out; 3076 } 3077 3078 unittest(1, "basic infrastructure of overlays passed"); 3079 3080 /* tests in sequence */ 3081 of_unittest_overlay_0(); 3082 of_unittest_overlay_1(); 3083 of_unittest_overlay_2(); 3084 of_unittest_overlay_3(); 3085 of_unittest_overlay_4(); 3086 of_unittest_overlay_5(); 3087 of_unittest_overlay_6(); 3088 of_unittest_overlay_8(); 3089 3090 of_unittest_overlay_10(); 3091 of_unittest_overlay_11(); 3092 3093 #if IS_BUILTIN(CONFIG_I2C) 3094 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 3095 goto out; 3096 3097 of_unittest_overlay_i2c_12(); 3098 of_unittest_overlay_i2c_13(); 3099 of_unittest_overlay_i2c_14(); 3100 of_unittest_overlay_i2c_15(); 3101 3102 of_unittest_overlay_i2c_cleanup(); 3103 #endif 3104 3105 of_unittest_overlay_gpio(); 3106 3107 of_unittest_remove_tracked_overlays(); 3108 3109 of_unittest_overlay_notify(); 3110 3111 out: 3112 of_node_put(bus_np); 3113 } 3114 3115 #else 3116 static inline void __init of_unittest_overlay(void) { } 3117 #endif 3118 3119 static void __init of_unittest_lifecycle(void) 3120 { 3121 #ifdef CONFIG_OF_DYNAMIC 3122 unsigned int refcount; 3123 int found_refcount_one = 0; 3124 int put_count = 0; 3125 struct device_node *np; 3126 struct device_node *prev_sibling, *next_sibling; 3127 const char *refcount_path = "/testcase-data/refcount-node"; 3128 const char *refcount_parent_path = "/testcase-data"; 3129 3130 /* 3131 * Node lifecycle tests, non-dynamic node: 3132 * 3133 * - Decrementing refcount to zero via of_node_put() should cause the 3134 * attempt to free the node memory by of_node_release() to fail 3135 * because the node is not a dynamic node. 3136 * 3137 * - Decrementing refcount past zero should result in additional 3138 * errors reported. 3139 */ 3140 3141 np = of_find_node_by_path(refcount_path); 3142 unittest(np, "find refcount_path \"%s\"\n", refcount_path); 3143 if (np == NULL) 3144 goto out_skip_tests; 3145 3146 while (!found_refcount_one) { 3147 3148 if (put_count++ > 10) { 3149 unittest(0, "guardrail to avoid infinite loop\n"); 3150 goto out_skip_tests; 3151 } 3152 3153 refcount = kref_read(&np->kobj.kref); 3154 if (refcount == 1) 3155 found_refcount_one = 1; 3156 else 3157 of_node_put(np); 3158 } 3159 3160 EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3161 3162 /* 3163 * refcount is now one, decrementing to zero will result in a call to 3164 * of_node_release() to free the node's memory, which should result 3165 * in an error 3166 */ 3167 unittest(1, "/testcase-data/refcount-node is one"); 3168 of_node_put(np); 3169 3170 EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3171 3172 3173 /* 3174 * expect stack trace for subsequent of_node_put(): 3175 * __refcount_sub_and_test() calls: 3176 * refcount_warn_saturate(r, REFCOUNT_SUB_UAF) 3177 * 3178 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just 3179 * the first three lines, and the last line. 3180 */ 3181 EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3182 EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3183 EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3184 EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3185 3186 /* refcount is now zero, this should fail */ 3187 unittest(1, "/testcase-data/refcount-node is zero"); 3188 of_node_put(np); 3189 3190 EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3191 EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3192 EXPECT_END(KERN_INFO, "WARNING: <<all>>"); 3193 EXPECT_END(KERN_INFO, "------------[ cut here ]------------"); 3194 3195 /* 3196 * Q. do we expect to get yet another warning? 3197 * A. no, the WARNING is from WARN_ONCE() 3198 */ 3199 EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3200 EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3201 EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3202 EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3203 3204 unittest(1, "/testcase-data/refcount-node is zero, second time"); 3205 of_node_put(np); 3206 3207 EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3208 EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3209 EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>"); 3210 EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------"); 3211 3212 /* 3213 * refcount of zero will trigger stack traces from any further 3214 * attempt to of_node_get() node "refcount-node". One example of 3215 * this is where of_unittest_check_node_linkage() will recursively 3216 * scan the tree, with 'for_each_child_of_node()' doing an 3217 * of_node_get() of the children of a node. 3218 * 3219 * Prevent the stack trace by removing node "refcount-node" from 3220 * its parent's child list. 3221 * 3222 * WARNING: EVIL, EVIL, EVIL: 3223 * 3224 * Directly manipulate the child list of node /testcase-data to 3225 * remove child refcount-node. This is ignoring all proper methods 3226 * of removing a child and will leak a small amount of memory. 3227 */ 3228 3229 np = of_find_node_by_path(refcount_parent_path); 3230 unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path); 3231 unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n"); 3232 if (np == NULL) 3233 return; 3234 3235 prev_sibling = np->child; 3236 next_sibling = prev_sibling->sibling; 3237 if (!strcmp(prev_sibling->full_name, "refcount-node")) { 3238 np->child = next_sibling; 3239 next_sibling = next_sibling->sibling; 3240 } 3241 while (next_sibling) { 3242 if (!strcmp(next_sibling->full_name, "refcount-node")) 3243 prev_sibling->sibling = next_sibling->sibling; 3244 prev_sibling = next_sibling; 3245 next_sibling = next_sibling->sibling; 3246 } 3247 of_node_put(np); 3248 3249 return; 3250 3251 out_skip_tests: 3252 #endif 3253 unittest(0, "One or more lifecycle tests skipped\n"); 3254 } 3255 3256 #ifdef CONFIG_OF_OVERLAY 3257 3258 /* 3259 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are 3260 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 3261 */ 3262 3263 #define OVERLAY_INFO_EXTERN(overlay_name) \ 3264 extern uint8_t __dtbo_##overlay_name##_begin[]; \ 3265 extern uint8_t __dtbo_##overlay_name##_end[] 3266 3267 #define OVERLAY_INFO(overlay_name, expected) \ 3268 { .dtbo_begin = __dtbo_##overlay_name##_begin, \ 3269 .dtbo_end = __dtbo_##overlay_name##_end, \ 3270 .expected_result = expected, \ 3271 .name = #overlay_name, \ 3272 } 3273 3274 struct overlay_info { 3275 uint8_t *dtbo_begin; 3276 uint8_t *dtbo_end; 3277 int expected_result; 3278 int ovcs_id; 3279 char *name; 3280 }; 3281 3282 OVERLAY_INFO_EXTERN(overlay_base); 3283 OVERLAY_INFO_EXTERN(overlay); 3284 OVERLAY_INFO_EXTERN(overlay_0); 3285 OVERLAY_INFO_EXTERN(overlay_1); 3286 OVERLAY_INFO_EXTERN(overlay_2); 3287 OVERLAY_INFO_EXTERN(overlay_3); 3288 OVERLAY_INFO_EXTERN(overlay_4); 3289 OVERLAY_INFO_EXTERN(overlay_5); 3290 OVERLAY_INFO_EXTERN(overlay_6); 3291 OVERLAY_INFO_EXTERN(overlay_7); 3292 OVERLAY_INFO_EXTERN(overlay_8); 3293 OVERLAY_INFO_EXTERN(overlay_9); 3294 OVERLAY_INFO_EXTERN(overlay_10); 3295 OVERLAY_INFO_EXTERN(overlay_11); 3296 OVERLAY_INFO_EXTERN(overlay_12); 3297 OVERLAY_INFO_EXTERN(overlay_13); 3298 OVERLAY_INFO_EXTERN(overlay_15); 3299 OVERLAY_INFO_EXTERN(overlay_16); 3300 OVERLAY_INFO_EXTERN(overlay_17); 3301 OVERLAY_INFO_EXTERN(overlay_18); 3302 OVERLAY_INFO_EXTERN(overlay_19); 3303 OVERLAY_INFO_EXTERN(overlay_20); 3304 OVERLAY_INFO_EXTERN(overlay_gpio_01); 3305 OVERLAY_INFO_EXTERN(overlay_gpio_02a); 3306 OVERLAY_INFO_EXTERN(overlay_gpio_02b); 3307 OVERLAY_INFO_EXTERN(overlay_gpio_03); 3308 OVERLAY_INFO_EXTERN(overlay_gpio_04a); 3309 OVERLAY_INFO_EXTERN(overlay_gpio_04b); 3310 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); 3311 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); 3312 OVERLAY_INFO_EXTERN(overlay_bad_phandle); 3313 OVERLAY_INFO_EXTERN(overlay_bad_symbol); 3314 3315 /* entries found by name */ 3316 static struct overlay_info overlays[] = { 3317 OVERLAY_INFO(overlay_base, -9999), 3318 OVERLAY_INFO(overlay, 0), 3319 OVERLAY_INFO(overlay_0, 0), 3320 OVERLAY_INFO(overlay_1, 0), 3321 OVERLAY_INFO(overlay_2, 0), 3322 OVERLAY_INFO(overlay_3, 0), 3323 OVERLAY_INFO(overlay_4, 0), 3324 OVERLAY_INFO(overlay_5, 0), 3325 OVERLAY_INFO(overlay_6, 0), 3326 OVERLAY_INFO(overlay_7, 0), 3327 OVERLAY_INFO(overlay_8, 0), 3328 OVERLAY_INFO(overlay_9, 0), 3329 OVERLAY_INFO(overlay_10, 0), 3330 OVERLAY_INFO(overlay_11, 0), 3331 OVERLAY_INFO(overlay_12, 0), 3332 OVERLAY_INFO(overlay_13, 0), 3333 OVERLAY_INFO(overlay_15, 0), 3334 OVERLAY_INFO(overlay_16, -EBUSY), 3335 OVERLAY_INFO(overlay_17, -EEXIST), 3336 OVERLAY_INFO(overlay_18, 0), 3337 OVERLAY_INFO(overlay_19, 0), 3338 OVERLAY_INFO(overlay_20, 0), 3339 OVERLAY_INFO(overlay_gpio_01, 0), 3340 OVERLAY_INFO(overlay_gpio_02a, 0), 3341 OVERLAY_INFO(overlay_gpio_02b, 0), 3342 OVERLAY_INFO(overlay_gpio_03, 0), 3343 OVERLAY_INFO(overlay_gpio_04a, 0), 3344 OVERLAY_INFO(overlay_gpio_04b, 0), 3345 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), 3346 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), 3347 OVERLAY_INFO(overlay_bad_phandle, -EINVAL), 3348 OVERLAY_INFO(overlay_bad_symbol, -EINVAL), 3349 /* end marker */ 3350 {.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL} 3351 }; 3352 3353 static struct device_node *overlay_base_root; 3354 3355 static void * __init dt_alloc_memory(u64 size, u64 align) 3356 { 3357 void *ptr = memblock_alloc(size, align); 3358 3359 if (!ptr) 3360 panic("%s: Failed to allocate %llu bytes align=0x%llx\n", 3361 __func__, size, align); 3362 3363 return ptr; 3364 } 3365 3366 /* 3367 * Create base device tree for the overlay unittest. 3368 * 3369 * This is called from very early boot code. 3370 * 3371 * Do as much as possible the same way as done in __unflatten_device_tree 3372 * and other early boot steps for the normal FDT so that the overlay base 3373 * unflattened tree will have the same characteristics as the real tree 3374 * (such as having memory allocated by the early allocator). The goal 3375 * is to test "the real thing" as much as possible, and test "test setup 3376 * code" as little as possible. 3377 * 3378 * Have to stop before resolving phandles, because that uses kmalloc. 3379 */ 3380 void __init unittest_unflatten_overlay_base(void) 3381 { 3382 struct overlay_info *info; 3383 u32 data_size; 3384 void *new_fdt; 3385 u32 size; 3386 int found = 0; 3387 const char *overlay_name = "overlay_base"; 3388 3389 for (info = overlays; info && info->name; info++) { 3390 if (!strcmp(overlay_name, info->name)) { 3391 found = 1; 3392 break; 3393 } 3394 } 3395 if (!found) { 3396 pr_err("no overlay data for %s\n", overlay_name); 3397 return; 3398 } 3399 3400 info = &overlays[0]; 3401 3402 if (info->expected_result != -9999) { 3403 pr_err("No dtb 'overlay_base' to attach\n"); 3404 return; 3405 } 3406 3407 data_size = info->dtbo_end - info->dtbo_begin; 3408 if (!data_size) { 3409 pr_err("No dtb 'overlay_base' to attach\n"); 3410 return; 3411 } 3412 3413 size = fdt_totalsize(info->dtbo_begin); 3414 if (size != data_size) { 3415 pr_err("dtb 'overlay_base' header totalsize != actual size"); 3416 return; 3417 } 3418 3419 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); 3420 if (!new_fdt) { 3421 pr_err("alloc for dtb 'overlay_base' failed"); 3422 return; 3423 } 3424 3425 memcpy(new_fdt, info->dtbo_begin, size); 3426 3427 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root, 3428 dt_alloc_memory, true); 3429 } 3430 3431 /* 3432 * The purpose of of_unittest_overlay_data_add is to add an 3433 * overlay in the normal fashion. This is a test of the whole 3434 * picture, instead of testing individual elements. 3435 * 3436 * A secondary purpose is to be able to verify that the contents of 3437 * /proc/device-tree/ contains the updated structure and values from 3438 * the overlay. That must be verified separately in user space. 3439 * 3440 * Return 0 on unexpected error. 3441 */ 3442 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id) 3443 { 3444 struct overlay_info *info; 3445 int found = 0; 3446 int ret; 3447 u32 size; 3448 3449 for (info = overlays; info && info->name; info++) { 3450 if (!strcmp(overlay_name, info->name)) { 3451 found = 1; 3452 break; 3453 } 3454 } 3455 if (!found) { 3456 pr_err("no overlay data for %s\n", overlay_name); 3457 return 0; 3458 } 3459 3460 size = info->dtbo_end - info->dtbo_begin; 3461 if (!size) 3462 pr_err("no overlay data for %s\n", overlay_name); 3463 3464 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id); 3465 if (ovcs_id) 3466 *ovcs_id = info->ovcs_id; 3467 if (ret < 0) 3468 goto out; 3469 3470 pr_debug("%s applied\n", overlay_name); 3471 3472 out: 3473 if (ret != info->expected_result) 3474 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n", 3475 info->expected_result, ret, overlay_name); 3476 3477 return (ret == info->expected_result); 3478 } 3479 3480 /* 3481 * The purpose of of_unittest_overlay_high_level is to add an overlay 3482 * in the normal fashion. This is a test of the whole picture, 3483 * instead of individual elements. 3484 * 3485 * The first part of the function is _not_ normal overlay usage; it is 3486 * finishing splicing the base overlay device tree into the live tree. 3487 */ 3488 static __init void of_unittest_overlay_high_level(void) 3489 { 3490 struct device_node *last_sibling; 3491 struct device_node *np; 3492 struct device_node *of_symbols; 3493 struct device_node *overlay_base_symbols; 3494 struct device_node **pprev; 3495 struct property *prop; 3496 int ret; 3497 3498 if (!overlay_base_root) { 3499 unittest(0, "overlay_base_root not initialized\n"); 3500 return; 3501 } 3502 3503 /* 3504 * Could not fixup phandles in unittest_unflatten_overlay_base() 3505 * because kmalloc() was not yet available. 3506 */ 3507 of_overlay_mutex_lock(); 3508 of_resolve_phandles(overlay_base_root); 3509 of_overlay_mutex_unlock(); 3510 3511 3512 /* 3513 * do not allow overlay_base to duplicate any node already in 3514 * tree, this greatly simplifies the code 3515 */ 3516 3517 /* 3518 * remove overlay_base_root node "__local_fixups", after 3519 * being used by of_resolve_phandles() 3520 */ 3521 pprev = &overlay_base_root->child; 3522 for (np = overlay_base_root->child; np; np = np->sibling) { 3523 if (of_node_name_eq(np, "__local_fixups__")) { 3524 *pprev = np->sibling; 3525 break; 3526 } 3527 pprev = &np->sibling; 3528 } 3529 3530 /* remove overlay_base_root node "__symbols__" if in live tree */ 3531 of_symbols = of_get_child_by_name(of_root, "__symbols__"); 3532 if (of_symbols) { 3533 /* will have to graft properties from node into live tree */ 3534 pprev = &overlay_base_root->child; 3535 for (np = overlay_base_root->child; np; np = np->sibling) { 3536 if (of_node_name_eq(np, "__symbols__")) { 3537 overlay_base_symbols = np; 3538 *pprev = np->sibling; 3539 break; 3540 } 3541 pprev = &np->sibling; 3542 } 3543 } 3544 3545 for_each_child_of_node(overlay_base_root, np) { 3546 struct device_node *base_child; 3547 for_each_child_of_node(of_root, base_child) { 3548 if (!strcmp(np->full_name, base_child->full_name)) { 3549 unittest(0, "illegal node name in overlay_base %pOFn", 3550 np); 3551 of_node_put(np); 3552 of_node_put(base_child); 3553 return; 3554 } 3555 } 3556 } 3557 3558 /* 3559 * overlay 'overlay_base' is not allowed to have root 3560 * properties, so only need to splice nodes into main device tree. 3561 * 3562 * root node of *overlay_base_root will not be freed, it is lost 3563 * memory. 3564 */ 3565 3566 for (np = overlay_base_root->child; np; np = np->sibling) 3567 np->parent = of_root; 3568 3569 mutex_lock(&of_mutex); 3570 3571 for (last_sibling = np = of_root->child; np; np = np->sibling) 3572 last_sibling = np; 3573 3574 if (last_sibling) 3575 last_sibling->sibling = overlay_base_root->child; 3576 else 3577 of_root->child = overlay_base_root->child; 3578 3579 for_each_of_allnodes_from(overlay_base_root, np) 3580 __of_attach_node_sysfs(np); 3581 3582 if (of_symbols) { 3583 struct property *new_prop; 3584 for_each_property_of_node(overlay_base_symbols, prop) { 3585 3586 new_prop = __of_prop_dup(prop, GFP_KERNEL); 3587 if (!new_prop) { 3588 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__", 3589 prop->name); 3590 goto err_unlock; 3591 } 3592 if (__of_add_property(of_symbols, new_prop)) { 3593 kfree(new_prop->name); 3594 kfree(new_prop->value); 3595 kfree(new_prop); 3596 /* "name" auto-generated by unflatten */ 3597 if (!strcmp(prop->name, "name")) 3598 continue; 3599 unittest(0, "duplicate property '%s' in overlay_base node __symbols__", 3600 prop->name); 3601 goto err_unlock; 3602 } 3603 if (__of_add_property_sysfs(of_symbols, new_prop)) { 3604 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs", 3605 prop->name); 3606 goto err_unlock; 3607 } 3608 } 3609 } 3610 3611 mutex_unlock(&of_mutex); 3612 3613 3614 /* now do the normal overlay usage test */ 3615 3616 EXPECT_BEGIN(KERN_ERR, 3617 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3618 EXPECT_BEGIN(KERN_ERR, 3619 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 3620 EXPECT_BEGIN(KERN_ERR, 3621 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up"); 3622 EXPECT_BEGIN(KERN_ERR, 3623 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up"); 3624 EXPECT_BEGIN(KERN_ERR, 3625 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 3626 EXPECT_BEGIN(KERN_ERR, 3627 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3628 EXPECT_BEGIN(KERN_ERR, 3629 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3630 EXPECT_BEGIN(KERN_ERR, 3631 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3632 EXPECT_BEGIN(KERN_ERR, 3633 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3634 EXPECT_BEGIN(KERN_ERR, 3635 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3636 EXPECT_BEGIN(KERN_ERR, 3637 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3638 3639 ret = overlay_data_apply("overlay", NULL); 3640 3641 EXPECT_END(KERN_ERR, 3642 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3643 EXPECT_END(KERN_ERR, 3644 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3645 EXPECT_END(KERN_ERR, 3646 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3647 EXPECT_END(KERN_ERR, 3648 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3649 EXPECT_END(KERN_ERR, 3650 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3651 EXPECT_END(KERN_ERR, 3652 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3653 EXPECT_END(KERN_ERR, 3654 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 3655 EXPECT_END(KERN_ERR, 3656 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up"); 3657 EXPECT_END(KERN_ERR, 3658 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up"); 3659 EXPECT_END(KERN_ERR, 3660 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 3661 EXPECT_END(KERN_ERR, 3662 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3663 3664 unittest(ret, "Adding overlay 'overlay' failed\n"); 3665 3666 EXPECT_BEGIN(KERN_ERR, 3667 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3668 EXPECT_BEGIN(KERN_ERR, 3669 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3670 3671 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), 3672 "Adding overlay 'overlay_bad_add_dup_node' failed\n"); 3673 3674 EXPECT_END(KERN_ERR, 3675 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3676 EXPECT_END(KERN_ERR, 3677 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3678 3679 EXPECT_BEGIN(KERN_ERR, 3680 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 3681 EXPECT_BEGIN(KERN_ERR, 3682 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail"); 3683 EXPECT_BEGIN(KERN_ERR, 3684 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name"); 3685 3686 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL), 3687 "Adding overlay 'overlay_bad_add_dup_prop' failed\n"); 3688 3689 EXPECT_END(KERN_ERR, 3690 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name"); 3691 EXPECT_END(KERN_ERR, 3692 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail"); 3693 EXPECT_END(KERN_ERR, 3694 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 3695 3696 unittest(overlay_data_apply("overlay_bad_phandle", NULL), 3697 "Adding overlay 'overlay_bad_phandle' failed\n"); 3698 3699 unittest(overlay_data_apply("overlay_bad_symbol", NULL), 3700 "Adding overlay 'overlay_bad_symbol' failed\n"); 3701 3702 return; 3703 3704 err_unlock: 3705 mutex_unlock(&of_mutex); 3706 } 3707 3708 #else 3709 3710 static inline __init void of_unittest_overlay_high_level(void) {} 3711 3712 #endif 3713 3714 static int __init of_unittest(void) 3715 { 3716 struct device_node *np; 3717 int res; 3718 3719 pr_info("start of unittest - you will see error messages\n"); 3720 3721 /* Taint the kernel so we know we've run tests. */ 3722 add_taint(TAINT_TEST, LOCKDEP_STILL_OK); 3723 3724 /* adding data for unittest */ 3725 3726 if (IS_ENABLED(CONFIG_UML)) 3727 unittest_unflatten_overlay_base(); 3728 3729 res = unittest_data_add(); 3730 if (res) 3731 return res; 3732 if (!of_aliases) 3733 of_aliases = of_find_node_by_path("/aliases"); 3734 3735 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 3736 if (!np) { 3737 pr_info("No testcase data in device tree; not running tests\n"); 3738 return 0; 3739 } 3740 of_node_put(np); 3741 3742 of_unittest_check_tree_linkage(); 3743 of_unittest_check_phandles(); 3744 of_unittest_find_node_by_name(); 3745 of_unittest_dynamic(); 3746 of_unittest_parse_phandle_with_args(); 3747 of_unittest_parse_phandle_with_args_map(); 3748 of_unittest_printf(); 3749 of_unittest_property_string(); 3750 of_unittest_property_copy(); 3751 of_unittest_changeset(); 3752 of_unittest_parse_interrupts(); 3753 of_unittest_parse_interrupts_extended(); 3754 of_unittest_dma_get_max_cpu_address(); 3755 of_unittest_parse_dma_ranges(); 3756 of_unittest_pci_dma_ranges(); 3757 of_unittest_bus_ranges(); 3758 of_unittest_bus_3cell_ranges(); 3759 of_unittest_reg(); 3760 of_unittest_match_node(); 3761 of_unittest_platform_populate(); 3762 of_unittest_overlay(); 3763 of_unittest_lifecycle(); 3764 3765 /* Double check linkage after removing testcase data */ 3766 of_unittest_check_tree_linkage(); 3767 3768 of_unittest_overlay_high_level(); 3769 3770 pr_info("end of unittest - %i passed, %i failed\n", 3771 unittest_results.passed, unittest_results.failed); 3772 3773 return 0; 3774 } 3775 late_initcall(of_unittest); 3776