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 && name && !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 && name && !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 && name && !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 && name && !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 if (!full_name) 1537 return; 1538 1539 if (!strcmp(full_name, "/__local_fixups__") || 1540 !strcmp(full_name, "/__fixups__")) { 1541 kfree(full_name); 1542 return; 1543 } 1544 1545 dup = of_find_node_by_path(full_name); 1546 kfree(full_name); 1547 if (dup) { 1548 update_node_properties(np, dup); 1549 return; 1550 } 1551 1552 child = np->child; 1553 np->child = NULL; 1554 1555 mutex_lock(&of_mutex); 1556 raw_spin_lock_irqsave(&devtree_lock, flags); 1557 np->sibling = np->parent->child; 1558 np->parent->child = np; 1559 of_node_clear_flag(np, OF_DETACHED); 1560 raw_spin_unlock_irqrestore(&devtree_lock, flags); 1561 1562 __of_attach_node_sysfs(np); 1563 mutex_unlock(&of_mutex); 1564 1565 while (child) { 1566 next = child->sibling; 1567 attach_node_and_children(child); 1568 child = next; 1569 } 1570 } 1571 1572 /** 1573 * unittest_data_add - Reads, copies data from 1574 * linked tree and attaches it to the live tree 1575 */ 1576 static int __init unittest_data_add(void) 1577 { 1578 void *unittest_data; 1579 void *unittest_data_align; 1580 struct device_node *unittest_data_node = NULL, *np; 1581 /* 1582 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically 1583 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 1584 */ 1585 extern uint8_t __dtbo_testcases_begin[]; 1586 extern uint8_t __dtbo_testcases_end[]; 1587 const int size = __dtbo_testcases_end - __dtbo_testcases_begin; 1588 int rc; 1589 void *ret; 1590 1591 if (!size) { 1592 pr_warn("%s: testcases is empty\n", __func__); 1593 return -ENODATA; 1594 } 1595 1596 /* creating copy */ 1597 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL); 1598 if (!unittest_data) 1599 return -ENOMEM; 1600 1601 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE); 1602 memcpy(unittest_data_align, __dtbo_testcases_begin, size); 1603 1604 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node); 1605 if (!ret) { 1606 pr_warn("%s: unflatten testcases tree failed\n", __func__); 1607 kfree(unittest_data); 1608 return -ENODATA; 1609 } 1610 if (!unittest_data_node) { 1611 pr_warn("%s: testcases tree is empty\n", __func__); 1612 kfree(unittest_data); 1613 return -ENODATA; 1614 } 1615 1616 /* 1617 * This lock normally encloses of_resolve_phandles() 1618 */ 1619 of_overlay_mutex_lock(); 1620 1621 rc = of_resolve_phandles(unittest_data_node); 1622 if (rc) { 1623 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 1624 of_overlay_mutex_unlock(); 1625 return -EINVAL; 1626 } 1627 1628 if (!of_root) { 1629 of_root = unittest_data_node; 1630 for_each_of_allnodes(np) 1631 __of_attach_node_sysfs(np); 1632 of_aliases = of_find_node_by_path("/aliases"); 1633 of_chosen = of_find_node_by_path("/chosen"); 1634 of_overlay_mutex_unlock(); 1635 return 0; 1636 } 1637 1638 EXPECT_BEGIN(KERN_INFO, 1639 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1640 1641 /* attach the sub-tree to live tree */ 1642 np = unittest_data_node->child; 1643 while (np) { 1644 struct device_node *next = np->sibling; 1645 1646 np->parent = of_root; 1647 /* this will clear OF_DETACHED in np and children */ 1648 attach_node_and_children(np); 1649 np = next; 1650 } 1651 1652 EXPECT_END(KERN_INFO, 1653 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1654 1655 of_overlay_mutex_unlock(); 1656 1657 return 0; 1658 } 1659 1660 #ifdef CONFIG_OF_OVERLAY 1661 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id); 1662 1663 static int unittest_probe(struct platform_device *pdev) 1664 { 1665 struct device *dev = &pdev->dev; 1666 struct device_node *np = dev->of_node; 1667 1668 if (np == NULL) { 1669 dev_err(dev, "No OF data for device\n"); 1670 return -EINVAL; 1671 1672 } 1673 1674 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1675 1676 of_platform_populate(np, NULL, NULL, &pdev->dev); 1677 1678 return 0; 1679 } 1680 1681 static void unittest_remove(struct platform_device *pdev) 1682 { 1683 struct device *dev = &pdev->dev; 1684 struct device_node *np = dev->of_node; 1685 1686 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1687 } 1688 1689 static const struct of_device_id unittest_match[] = { 1690 { .compatible = "unittest", }, 1691 {}, 1692 }; 1693 1694 static struct platform_driver unittest_driver = { 1695 .probe = unittest_probe, 1696 .remove_new = unittest_remove, 1697 .driver = { 1698 .name = "unittest", 1699 .of_match_table = of_match_ptr(unittest_match), 1700 }, 1701 }; 1702 1703 /* get the platform device instantiated at the path */ 1704 static struct platform_device *of_path_to_platform_device(const char *path) 1705 { 1706 struct device_node *np; 1707 struct platform_device *pdev; 1708 1709 np = of_find_node_by_path(path); 1710 if (np == NULL) 1711 return NULL; 1712 1713 pdev = of_find_device_by_node(np); 1714 of_node_put(np); 1715 1716 return pdev; 1717 } 1718 1719 /* find out if a platform device exists at that path */ 1720 static int of_path_platform_device_exists(const char *path) 1721 { 1722 struct platform_device *pdev; 1723 1724 pdev = of_path_to_platform_device(path); 1725 platform_device_put(pdev); 1726 return pdev != NULL; 1727 } 1728 1729 #ifdef CONFIG_OF_GPIO 1730 1731 struct unittest_gpio_dev { 1732 struct gpio_chip chip; 1733 }; 1734 1735 static int unittest_gpio_chip_request_count; 1736 static int unittest_gpio_probe_count; 1737 static int unittest_gpio_probe_pass_count; 1738 1739 static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset) 1740 { 1741 unittest_gpio_chip_request_count++; 1742 1743 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset, 1744 unittest_gpio_chip_request_count); 1745 return 0; 1746 } 1747 1748 static int unittest_gpio_probe(struct platform_device *pdev) 1749 { 1750 struct unittest_gpio_dev *devptr; 1751 int ret; 1752 1753 unittest_gpio_probe_count++; 1754 1755 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL); 1756 if (!devptr) 1757 return -ENOMEM; 1758 1759 platform_set_drvdata(pdev, devptr); 1760 1761 devptr->chip.fwnode = dev_fwnode(&pdev->dev); 1762 devptr->chip.label = "of-unittest-gpio"; 1763 devptr->chip.base = -1; /* dynamic allocation */ 1764 devptr->chip.ngpio = 5; 1765 devptr->chip.request = unittest_gpio_chip_request; 1766 1767 ret = gpiochip_add_data(&devptr->chip, NULL); 1768 1769 unittest(!ret, 1770 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret); 1771 1772 if (!ret) 1773 unittest_gpio_probe_pass_count++; 1774 return ret; 1775 } 1776 1777 static void unittest_gpio_remove(struct platform_device *pdev) 1778 { 1779 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev); 1780 struct device *dev = &pdev->dev; 1781 1782 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode); 1783 1784 if (devptr->chip.base != -1) 1785 gpiochip_remove(&devptr->chip); 1786 1787 kfree(devptr); 1788 } 1789 1790 static const struct of_device_id unittest_gpio_id[] = { 1791 { .compatible = "unittest-gpio", }, 1792 {} 1793 }; 1794 1795 static struct platform_driver unittest_gpio_driver = { 1796 .probe = unittest_gpio_probe, 1797 .remove_new = unittest_gpio_remove, 1798 .driver = { 1799 .name = "unittest-gpio", 1800 .of_match_table = of_match_ptr(unittest_gpio_id), 1801 }, 1802 }; 1803 1804 static void __init of_unittest_overlay_gpio(void) 1805 { 1806 int chip_request_count; 1807 int probe_pass_count; 1808 int ret; 1809 1810 /* 1811 * tests: apply overlays before registering driver 1812 * Similar to installing a driver as a module, the 1813 * driver is registered after applying the overlays. 1814 * 1815 * The overlays are applied by overlay_data_apply() 1816 * instead of of_unittest_apply_overlay() so that they 1817 * will not be tracked. Thus they will not be removed 1818 * by of_unittest_remove_tracked_overlays(). 1819 * 1820 * - apply overlay_gpio_01 1821 * - apply overlay_gpio_02a 1822 * - apply overlay_gpio_02b 1823 * - register driver 1824 * 1825 * register driver will result in 1826 * - probe and processing gpio hog for overlay_gpio_01 1827 * - probe for overlay_gpio_02a 1828 * - processing gpio for overlay_gpio_02b 1829 */ 1830 1831 probe_pass_count = unittest_gpio_probe_pass_count; 1832 chip_request_count = unittest_gpio_chip_request_count; 1833 1834 /* 1835 * overlay_gpio_01 contains gpio node and child gpio hog node 1836 * overlay_gpio_02a contains gpio node 1837 * overlay_gpio_02b contains child gpio hog node 1838 */ 1839 1840 unittest(overlay_data_apply("overlay_gpio_01", NULL), 1841 "Adding overlay 'overlay_gpio_01' failed\n"); 1842 1843 unittest(overlay_data_apply("overlay_gpio_02a", NULL), 1844 "Adding overlay 'overlay_gpio_02a' failed\n"); 1845 1846 unittest(overlay_data_apply("overlay_gpio_02b", NULL), 1847 "Adding overlay 'overlay_gpio_02b' failed\n"); 1848 1849 ret = platform_driver_register(&unittest_gpio_driver); 1850 if (unittest(ret == 0, "could not register unittest gpio driver\n")) 1851 return; 1852 1853 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count, 1854 "unittest_gpio_probe() failed or not called\n"); 1855 1856 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count, 1857 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1858 unittest_gpio_chip_request_count - chip_request_count); 1859 1860 /* 1861 * tests: apply overlays after registering driver 1862 * 1863 * Similar to a driver built-in to the kernel, the 1864 * driver is registered before applying the overlays. 1865 * 1866 * overlay_gpio_03 contains gpio node and child gpio hog node 1867 * 1868 * - apply overlay_gpio_03 1869 * 1870 * apply overlay will result in 1871 * - probe and processing gpio hog. 1872 */ 1873 1874 probe_pass_count = unittest_gpio_probe_pass_count; 1875 chip_request_count = unittest_gpio_chip_request_count; 1876 1877 /* overlay_gpio_03 contains gpio node and child gpio hog node */ 1878 1879 unittest(overlay_data_apply("overlay_gpio_03", NULL), 1880 "Adding overlay 'overlay_gpio_03' failed\n"); 1881 1882 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1883 "unittest_gpio_probe() failed or not called\n"); 1884 1885 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1886 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1887 unittest_gpio_chip_request_count - chip_request_count); 1888 1889 /* 1890 * overlay_gpio_04a contains gpio node 1891 * 1892 * - apply overlay_gpio_04a 1893 * 1894 * apply the overlay will result in 1895 * - probe for overlay_gpio_04a 1896 */ 1897 1898 probe_pass_count = unittest_gpio_probe_pass_count; 1899 chip_request_count = unittest_gpio_chip_request_count; 1900 1901 /* overlay_gpio_04a contains gpio node */ 1902 1903 unittest(overlay_data_apply("overlay_gpio_04a", NULL), 1904 "Adding overlay 'overlay_gpio_04a' failed\n"); 1905 1906 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1907 "unittest_gpio_probe() failed or not called\n"); 1908 1909 /* 1910 * overlay_gpio_04b contains child gpio hog node 1911 * 1912 * - apply overlay_gpio_04b 1913 * 1914 * apply the overlay will result in 1915 * - processing gpio for overlay_gpio_04b 1916 */ 1917 1918 /* overlay_gpio_04b contains child gpio hog node */ 1919 1920 unittest(overlay_data_apply("overlay_gpio_04b", NULL), 1921 "Adding overlay 'overlay_gpio_04b' failed\n"); 1922 1923 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1924 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1925 unittest_gpio_chip_request_count - chip_request_count); 1926 } 1927 1928 #else 1929 1930 static void __init of_unittest_overlay_gpio(void) 1931 { 1932 /* skip tests */ 1933 } 1934 1935 #endif 1936 1937 #if IS_BUILTIN(CONFIG_I2C) 1938 1939 /* get the i2c client device instantiated at the path */ 1940 static struct i2c_client *of_path_to_i2c_client(const char *path) 1941 { 1942 struct device_node *np; 1943 struct i2c_client *client; 1944 1945 np = of_find_node_by_path(path); 1946 if (np == NULL) 1947 return NULL; 1948 1949 client = of_find_i2c_device_by_node(np); 1950 of_node_put(np); 1951 1952 return client; 1953 } 1954 1955 /* find out if a i2c client device exists at that path */ 1956 static int of_path_i2c_client_exists(const char *path) 1957 { 1958 struct i2c_client *client; 1959 1960 client = of_path_to_i2c_client(path); 1961 if (client) 1962 put_device(&client->dev); 1963 return client != NULL; 1964 } 1965 #else 1966 static int of_path_i2c_client_exists(const char *path) 1967 { 1968 return 0; 1969 } 1970 #endif 1971 1972 enum overlay_type { 1973 PDEV_OVERLAY, 1974 I2C_OVERLAY 1975 }; 1976 1977 static int of_path_device_type_exists(const char *path, 1978 enum overlay_type ovtype) 1979 { 1980 switch (ovtype) { 1981 case PDEV_OVERLAY: 1982 return of_path_platform_device_exists(path); 1983 case I2C_OVERLAY: 1984 return of_path_i2c_client_exists(path); 1985 } 1986 return 0; 1987 } 1988 1989 static const char *unittest_path(int nr, enum overlay_type ovtype) 1990 { 1991 const char *base; 1992 static char buf[256]; 1993 1994 switch (ovtype) { 1995 case PDEV_OVERLAY: 1996 base = "/testcase-data/overlay-node/test-bus"; 1997 break; 1998 case I2C_OVERLAY: 1999 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 2000 break; 2001 default: 2002 buf[0] = '\0'; 2003 return buf; 2004 } 2005 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 2006 buf[sizeof(buf) - 1] = '\0'; 2007 return buf; 2008 } 2009 2010 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 2011 { 2012 const char *path; 2013 2014 path = unittest_path(unittest_nr, ovtype); 2015 2016 switch (ovtype) { 2017 case PDEV_OVERLAY: 2018 return of_path_platform_device_exists(path); 2019 case I2C_OVERLAY: 2020 return of_path_i2c_client_exists(path); 2021 } 2022 return 0; 2023 } 2024 2025 static const char *overlay_name_from_nr(int nr) 2026 { 2027 static char buf[256]; 2028 2029 snprintf(buf, sizeof(buf) - 1, 2030 "overlay_%d", nr); 2031 buf[sizeof(buf) - 1] = '\0'; 2032 2033 return buf; 2034 } 2035 2036 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 2037 2038 #define MAX_TRACK_OVCS_IDS 256 2039 2040 static int track_ovcs_id[MAX_TRACK_OVCS_IDS]; 2041 static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS]; 2042 static int track_ovcs_id_cnt; 2043 2044 static void of_unittest_track_overlay(int ovcs_id, int overlay_nr) 2045 { 2046 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS)) 2047 return; 2048 2049 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id; 2050 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr; 2051 track_ovcs_id_cnt++; 2052 } 2053 2054 static void of_unittest_untrack_overlay(int ovcs_id) 2055 { 2056 if (WARN_ON(track_ovcs_id_cnt < 1)) 2057 return; 2058 2059 track_ovcs_id_cnt--; 2060 2061 /* If out of synch then test is broken. Do not try to recover. */ 2062 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id); 2063 } 2064 2065 static void of_unittest_remove_tracked_overlays(void) 2066 { 2067 int ret, ovcs_id, overlay_nr, save_ovcs_id; 2068 const char *overlay_name; 2069 2070 while (track_ovcs_id_cnt > 0) { 2071 2072 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1]; 2073 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1]; 2074 save_ovcs_id = ovcs_id; 2075 ret = of_overlay_remove(&ovcs_id); 2076 if (ret == -ENODEV) { 2077 overlay_name = overlay_name_from_nr(overlay_nr); 2078 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n", 2079 __func__, overlay_name, ret); 2080 } 2081 of_unittest_untrack_overlay(save_ovcs_id); 2082 } 2083 2084 } 2085 2086 static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id) 2087 { 2088 /* 2089 * The overlay will be tracked, thus it will be removed 2090 * by of_unittest_remove_tracked_overlays(). 2091 */ 2092 2093 const char *overlay_name; 2094 2095 overlay_name = overlay_name_from_nr(overlay_nr); 2096 2097 if (!overlay_data_apply(overlay_name, ovcs_id)) { 2098 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2099 return -EFAULT; 2100 } 2101 of_unittest_track_overlay(*ovcs_id, overlay_nr); 2102 2103 return 0; 2104 } 2105 2106 /* apply an overlay while checking before and after states */ 2107 static int __init of_unittest_apply_overlay_check(int overlay_nr, 2108 int unittest_nr, int before, int after, 2109 enum overlay_type ovtype) 2110 { 2111 int ret, ovcs_id; 2112 2113 /* unittest device must not be in before state */ 2114 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2115 unittest(0, "%s with device @\"%s\" %s\n", 2116 overlay_name_from_nr(overlay_nr), 2117 unittest_path(unittest_nr, ovtype), 2118 !before ? "enabled" : "disabled"); 2119 return -EINVAL; 2120 } 2121 2122 ovcs_id = 0; 2123 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2124 if (ret != 0) { 2125 /* of_unittest_apply_overlay already called unittest() */ 2126 return ret; 2127 } 2128 2129 /* unittest device must be to set to after state */ 2130 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2131 unittest(0, "%s failed to create @\"%s\" %s\n", 2132 overlay_name_from_nr(overlay_nr), 2133 unittest_path(unittest_nr, ovtype), 2134 !after ? "enabled" : "disabled"); 2135 return -EINVAL; 2136 } 2137 2138 return 0; 2139 } 2140 2141 /* apply an overlay and then revert it while checking before, after states */ 2142 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, 2143 int unittest_nr, int before, int after, 2144 enum overlay_type ovtype) 2145 { 2146 int ret, ovcs_id, save_ovcs_id; 2147 2148 /* unittest device must be in before state */ 2149 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2150 unittest(0, "%s with device @\"%s\" %s\n", 2151 overlay_name_from_nr(overlay_nr), 2152 unittest_path(unittest_nr, ovtype), 2153 !before ? "enabled" : "disabled"); 2154 return -EINVAL; 2155 } 2156 2157 /* apply the overlay */ 2158 ovcs_id = 0; 2159 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2160 if (ret != 0) { 2161 /* of_unittest_apply_overlay already called unittest() */ 2162 return ret; 2163 } 2164 2165 /* unittest device must be in after state */ 2166 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2167 unittest(0, "%s failed to create @\"%s\" %s\n", 2168 overlay_name_from_nr(overlay_nr), 2169 unittest_path(unittest_nr, ovtype), 2170 !after ? "enabled" : "disabled"); 2171 return -EINVAL; 2172 } 2173 2174 save_ovcs_id = ovcs_id; 2175 ret = of_overlay_remove(&ovcs_id); 2176 if (ret != 0) { 2177 unittest(0, "%s failed to be destroyed @\"%s\"\n", 2178 overlay_name_from_nr(overlay_nr), 2179 unittest_path(unittest_nr, ovtype)); 2180 return ret; 2181 } 2182 of_unittest_untrack_overlay(save_ovcs_id); 2183 2184 /* unittest device must be again in before state */ 2185 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 2186 unittest(0, "%s with device @\"%s\" %s\n", 2187 overlay_name_from_nr(overlay_nr), 2188 unittest_path(unittest_nr, ovtype), 2189 !before ? "enabled" : "disabled"); 2190 return -EINVAL; 2191 } 2192 2193 return 0; 2194 } 2195 2196 /* test activation of device */ 2197 static void __init of_unittest_overlay_0(void) 2198 { 2199 int ret; 2200 2201 EXPECT_BEGIN(KERN_INFO, 2202 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2203 2204 /* device should enable */ 2205 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); 2206 2207 EXPECT_END(KERN_INFO, 2208 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2209 2210 if (ret) 2211 return; 2212 2213 unittest(1, "overlay test %d passed\n", 0); 2214 } 2215 2216 /* test deactivation of device */ 2217 static void __init of_unittest_overlay_1(void) 2218 { 2219 int ret; 2220 2221 EXPECT_BEGIN(KERN_INFO, 2222 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2223 2224 /* device should disable */ 2225 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); 2226 2227 EXPECT_END(KERN_INFO, 2228 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2229 2230 if (ret) 2231 return; 2232 2233 unittest(1, "overlay test %d passed\n", 1); 2234 2235 } 2236 2237 /* test activation of device */ 2238 static void __init of_unittest_overlay_2(void) 2239 { 2240 int ret; 2241 2242 EXPECT_BEGIN(KERN_INFO, 2243 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2244 2245 /* device should enable */ 2246 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); 2247 2248 EXPECT_END(KERN_INFO, 2249 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2250 2251 if (ret) 2252 return; 2253 unittest(1, "overlay test %d passed\n", 2); 2254 } 2255 2256 /* test deactivation of device */ 2257 static void __init of_unittest_overlay_3(void) 2258 { 2259 int ret; 2260 2261 EXPECT_BEGIN(KERN_INFO, 2262 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2263 2264 /* device should disable */ 2265 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); 2266 2267 EXPECT_END(KERN_INFO, 2268 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2269 2270 if (ret) 2271 return; 2272 2273 unittest(1, "overlay test %d passed\n", 3); 2274 } 2275 2276 /* test activation of a full device node */ 2277 static void __init of_unittest_overlay_4(void) 2278 { 2279 /* device should disable */ 2280 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY)) 2281 return; 2282 2283 unittest(1, "overlay test %d passed\n", 4); 2284 } 2285 2286 /* test overlay apply/revert sequence */ 2287 static void __init of_unittest_overlay_5(void) 2288 { 2289 int ret; 2290 2291 EXPECT_BEGIN(KERN_INFO, 2292 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2293 2294 /* device should disable */ 2295 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); 2296 2297 EXPECT_END(KERN_INFO, 2298 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2299 2300 if (ret) 2301 return; 2302 2303 unittest(1, "overlay test %d passed\n", 5); 2304 } 2305 2306 /* test overlay application in sequence */ 2307 static void __init of_unittest_overlay_6(void) 2308 { 2309 int i, save_ovcs_id[2], ovcs_id; 2310 int overlay_nr = 6, unittest_nr = 6; 2311 int before = 0, after = 1; 2312 const char *overlay_name; 2313 2314 int ret; 2315 2316 /* unittest device must be in before state */ 2317 for (i = 0; i < 2; i++) { 2318 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2319 != before) { 2320 unittest(0, "%s with device @\"%s\" %s\n", 2321 overlay_name_from_nr(overlay_nr + i), 2322 unittest_path(unittest_nr + i, 2323 PDEV_OVERLAY), 2324 !before ? "enabled" : "disabled"); 2325 return; 2326 } 2327 } 2328 2329 /* apply the overlays */ 2330 2331 EXPECT_BEGIN(KERN_INFO, 2332 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2333 2334 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2335 2336 ret = overlay_data_apply(overlay_name, &ovcs_id); 2337 2338 if (!ret) { 2339 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2340 return; 2341 } 2342 save_ovcs_id[0] = ovcs_id; 2343 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2344 2345 EXPECT_END(KERN_INFO, 2346 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2347 2348 EXPECT_BEGIN(KERN_INFO, 2349 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2350 2351 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2352 2353 ret = overlay_data_apply(overlay_name, &ovcs_id); 2354 2355 if (!ret) { 2356 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2357 return; 2358 } 2359 save_ovcs_id[1] = ovcs_id; 2360 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2361 2362 EXPECT_END(KERN_INFO, 2363 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2364 2365 2366 for (i = 0; i < 2; i++) { 2367 /* unittest device must be in after state */ 2368 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2369 != after) { 2370 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 2371 overlay_name_from_nr(overlay_nr + i), 2372 unittest_path(unittest_nr + i, 2373 PDEV_OVERLAY), 2374 !after ? "enabled" : "disabled"); 2375 return; 2376 } 2377 } 2378 2379 for (i = 1; i >= 0; i--) { 2380 ovcs_id = save_ovcs_id[i]; 2381 if (of_overlay_remove(&ovcs_id)) { 2382 unittest(0, "%s failed destroy @\"%s\"\n", 2383 overlay_name_from_nr(overlay_nr + i), 2384 unittest_path(unittest_nr + i, 2385 PDEV_OVERLAY)); 2386 return; 2387 } 2388 of_unittest_untrack_overlay(save_ovcs_id[i]); 2389 } 2390 2391 for (i = 0; i < 2; i++) { 2392 /* unittest device must be again in before state */ 2393 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2394 != before) { 2395 unittest(0, "%s with device @\"%s\" %s\n", 2396 overlay_name_from_nr(overlay_nr + i), 2397 unittest_path(unittest_nr + i, 2398 PDEV_OVERLAY), 2399 !before ? "enabled" : "disabled"); 2400 return; 2401 } 2402 } 2403 2404 unittest(1, "overlay test %d passed\n", 6); 2405 2406 } 2407 2408 /* test overlay application in sequence */ 2409 static void __init of_unittest_overlay_8(void) 2410 { 2411 int i, save_ovcs_id[2], ovcs_id; 2412 int overlay_nr = 8, unittest_nr = 8; 2413 const char *overlay_name; 2414 int ret; 2415 2416 /* we don't care about device state in this test */ 2417 2418 EXPECT_BEGIN(KERN_INFO, 2419 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status"); 2420 2421 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2422 2423 ret = overlay_data_apply(overlay_name, &ovcs_id); 2424 if (!ret) 2425 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2426 2427 EXPECT_END(KERN_INFO, 2428 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status"); 2429 2430 if (!ret) 2431 return; 2432 2433 save_ovcs_id[0] = ovcs_id; 2434 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2435 2436 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2437 2438 EXPECT_BEGIN(KERN_INFO, 2439 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2440 2441 /* apply the overlays */ 2442 ret = overlay_data_apply(overlay_name, &ovcs_id); 2443 2444 EXPECT_END(KERN_INFO, 2445 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2446 2447 if (!ret) { 2448 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2449 return; 2450 } 2451 2452 save_ovcs_id[1] = ovcs_id; 2453 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2454 2455 /* now try to remove first overlay (it should fail) */ 2456 ovcs_id = save_ovcs_id[0]; 2457 2458 EXPECT_BEGIN(KERN_INFO, 2459 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2460 2461 EXPECT_BEGIN(KERN_INFO, 2462 "OF: overlay: overlay #6 is not topmost"); 2463 2464 ret = of_overlay_remove(&ovcs_id); 2465 2466 EXPECT_END(KERN_INFO, 2467 "OF: overlay: overlay #6 is not topmost"); 2468 2469 EXPECT_END(KERN_INFO, 2470 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2471 2472 if (!ret) { 2473 /* 2474 * Should never get here. If we do, expect a lot of 2475 * subsequent tracking and overlay removal related errors. 2476 */ 2477 unittest(0, "%s was destroyed @\"%s\"\n", 2478 overlay_name_from_nr(overlay_nr + 0), 2479 unittest_path(unittest_nr, 2480 PDEV_OVERLAY)); 2481 return; 2482 } 2483 2484 /* removing them in order should work */ 2485 for (i = 1; i >= 0; i--) { 2486 ovcs_id = save_ovcs_id[i]; 2487 if (of_overlay_remove(&ovcs_id)) { 2488 unittest(0, "%s not destroyed @\"%s\"\n", 2489 overlay_name_from_nr(overlay_nr + i), 2490 unittest_path(unittest_nr, 2491 PDEV_OVERLAY)); 2492 return; 2493 } 2494 of_unittest_untrack_overlay(save_ovcs_id[i]); 2495 } 2496 2497 unittest(1, "overlay test %d passed\n", 8); 2498 } 2499 2500 /* test insertion of a bus with parent devices */ 2501 static void __init of_unittest_overlay_10(void) 2502 { 2503 int ret; 2504 char *child_path; 2505 2506 /* device should disable */ 2507 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 2508 2509 if (unittest(ret == 0, 2510 "overlay test %d failed; overlay application\n", 10)) 2511 return; 2512 2513 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 2514 unittest_path(10, PDEV_OVERLAY)); 2515 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 2516 return; 2517 2518 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 2519 kfree(child_path); 2520 2521 unittest(ret, "overlay test %d failed; no child device\n", 10); 2522 } 2523 2524 /* test insertion of a bus with parent devices (and revert) */ 2525 static void __init of_unittest_overlay_11(void) 2526 { 2527 int ret; 2528 2529 /* device should disable */ 2530 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 2531 PDEV_OVERLAY); 2532 2533 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11); 2534 } 2535 2536 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 2537 2538 struct unittest_i2c_bus_data { 2539 struct platform_device *pdev; 2540 struct i2c_adapter adap; 2541 }; 2542 2543 static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 2544 struct i2c_msg *msgs, int num) 2545 { 2546 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 2547 2548 (void)std; 2549 2550 return num; 2551 } 2552 2553 static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 2554 { 2555 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 2556 } 2557 2558 static const struct i2c_algorithm unittest_i2c_algo = { 2559 .master_xfer = unittest_i2c_master_xfer, 2560 .functionality = unittest_i2c_functionality, 2561 }; 2562 2563 static int unittest_i2c_bus_probe(struct platform_device *pdev) 2564 { 2565 struct device *dev = &pdev->dev; 2566 struct device_node *np = dev->of_node; 2567 struct unittest_i2c_bus_data *std; 2568 struct i2c_adapter *adap; 2569 int ret; 2570 2571 if (np == NULL) { 2572 dev_err(dev, "No OF data for device\n"); 2573 return -EINVAL; 2574 2575 } 2576 2577 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2578 2579 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 2580 if (!std) 2581 return -ENOMEM; 2582 2583 /* link them together */ 2584 std->pdev = pdev; 2585 platform_set_drvdata(pdev, std); 2586 2587 adap = &std->adap; 2588 i2c_set_adapdata(adap, std); 2589 adap->nr = -1; 2590 strscpy(adap->name, pdev->name, sizeof(adap->name)); 2591 adap->class = I2C_CLASS_DEPRECATED; 2592 adap->algo = &unittest_i2c_algo; 2593 adap->dev.parent = dev; 2594 adap->dev.of_node = dev->of_node; 2595 adap->timeout = 5 * HZ; 2596 adap->retries = 3; 2597 2598 ret = i2c_add_numbered_adapter(adap); 2599 if (ret != 0) { 2600 dev_err(dev, "Failed to add I2C adapter\n"); 2601 return ret; 2602 } 2603 2604 return 0; 2605 } 2606 2607 static void unittest_i2c_bus_remove(struct platform_device *pdev) 2608 { 2609 struct device *dev = &pdev->dev; 2610 struct device_node *np = dev->of_node; 2611 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 2612 2613 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2614 i2c_del_adapter(&std->adap); 2615 } 2616 2617 static const struct of_device_id unittest_i2c_bus_match[] = { 2618 { .compatible = "unittest-i2c-bus", }, 2619 {}, 2620 }; 2621 2622 static struct platform_driver unittest_i2c_bus_driver = { 2623 .probe = unittest_i2c_bus_probe, 2624 .remove_new = unittest_i2c_bus_remove, 2625 .driver = { 2626 .name = "unittest-i2c-bus", 2627 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 2628 }, 2629 }; 2630 2631 static int unittest_i2c_dev_probe(struct i2c_client *client) 2632 { 2633 struct device *dev = &client->dev; 2634 struct device_node *np = client->dev.of_node; 2635 2636 if (!np) { 2637 dev_err(dev, "No OF node\n"); 2638 return -EINVAL; 2639 } 2640 2641 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2642 2643 return 0; 2644 }; 2645 2646 static void unittest_i2c_dev_remove(struct i2c_client *client) 2647 { 2648 struct device *dev = &client->dev; 2649 struct device_node *np = client->dev.of_node; 2650 2651 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2652 } 2653 2654 static const struct i2c_device_id unittest_i2c_dev_id[] = { 2655 { .name = "unittest-i2c-dev" }, 2656 { } 2657 }; 2658 2659 static struct i2c_driver unittest_i2c_dev_driver = { 2660 .driver = { 2661 .name = "unittest-i2c-dev", 2662 }, 2663 .probe = unittest_i2c_dev_probe, 2664 .remove = unittest_i2c_dev_remove, 2665 .id_table = unittest_i2c_dev_id, 2666 }; 2667 2668 #if IS_BUILTIN(CONFIG_I2C_MUX) 2669 2670 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) 2671 { 2672 return 0; 2673 } 2674 2675 static int unittest_i2c_mux_probe(struct i2c_client *client) 2676 { 2677 int i, nchans; 2678 struct device *dev = &client->dev; 2679 struct i2c_adapter *adap = client->adapter; 2680 struct device_node *np = client->dev.of_node, *child; 2681 struct i2c_mux_core *muxc; 2682 u32 reg, max_reg; 2683 2684 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2685 2686 if (!np) { 2687 dev_err(dev, "No OF node\n"); 2688 return -EINVAL; 2689 } 2690 2691 max_reg = (u32)-1; 2692 for_each_child_of_node(np, child) { 2693 if (of_property_read_u32(child, "reg", ®)) 2694 continue; 2695 if (max_reg == (u32)-1 || reg > max_reg) 2696 max_reg = reg; 2697 } 2698 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 2699 if (nchans == 0) { 2700 dev_err(dev, "No channels\n"); 2701 return -EINVAL; 2702 } 2703 2704 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0, 2705 unittest_i2c_mux_select_chan, NULL); 2706 if (!muxc) 2707 return -ENOMEM; 2708 for (i = 0; i < nchans; i++) { 2709 if (i2c_mux_add_adapter(muxc, 0, i, 0)) { 2710 dev_err(dev, "Failed to register mux #%d\n", i); 2711 i2c_mux_del_adapters(muxc); 2712 return -ENODEV; 2713 } 2714 } 2715 2716 i2c_set_clientdata(client, muxc); 2717 2718 return 0; 2719 }; 2720 2721 static void unittest_i2c_mux_remove(struct i2c_client *client) 2722 { 2723 struct device *dev = &client->dev; 2724 struct device_node *np = client->dev.of_node; 2725 struct i2c_mux_core *muxc = i2c_get_clientdata(client); 2726 2727 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2728 i2c_mux_del_adapters(muxc); 2729 } 2730 2731 static const struct i2c_device_id unittest_i2c_mux_id[] = { 2732 { .name = "unittest-i2c-mux" }, 2733 { } 2734 }; 2735 2736 static struct i2c_driver unittest_i2c_mux_driver = { 2737 .driver = { 2738 .name = "unittest-i2c-mux", 2739 }, 2740 .probe = unittest_i2c_mux_probe, 2741 .remove = unittest_i2c_mux_remove, 2742 .id_table = unittest_i2c_mux_id, 2743 }; 2744 2745 #endif 2746 2747 static int of_unittest_overlay_i2c_init(void) 2748 { 2749 int ret; 2750 2751 ret = i2c_add_driver(&unittest_i2c_dev_driver); 2752 if (unittest(ret == 0, 2753 "could not register unittest i2c device driver\n")) 2754 return ret; 2755 2756 ret = platform_driver_register(&unittest_i2c_bus_driver); 2757 2758 if (unittest(ret == 0, 2759 "could not register unittest i2c bus driver\n")) 2760 return ret; 2761 2762 #if IS_BUILTIN(CONFIG_I2C_MUX) 2763 2764 EXPECT_BEGIN(KERN_INFO, 2765 "i2c i2c-1: Added multiplexed i2c bus 2"); 2766 2767 ret = i2c_add_driver(&unittest_i2c_mux_driver); 2768 2769 EXPECT_END(KERN_INFO, 2770 "i2c i2c-1: Added multiplexed i2c bus 2"); 2771 2772 if (unittest(ret == 0, 2773 "could not register unittest i2c mux driver\n")) 2774 return ret; 2775 #endif 2776 2777 return 0; 2778 } 2779 2780 static void of_unittest_overlay_i2c_cleanup(void) 2781 { 2782 #if IS_BUILTIN(CONFIG_I2C_MUX) 2783 i2c_del_driver(&unittest_i2c_mux_driver); 2784 #endif 2785 platform_driver_unregister(&unittest_i2c_bus_driver); 2786 i2c_del_driver(&unittest_i2c_dev_driver); 2787 } 2788 2789 static void __init of_unittest_overlay_i2c_12(void) 2790 { 2791 int ret; 2792 2793 /* device should enable */ 2794 EXPECT_BEGIN(KERN_INFO, 2795 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2796 2797 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); 2798 2799 EXPECT_END(KERN_INFO, 2800 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2801 2802 if (ret) 2803 return; 2804 2805 unittest(1, "overlay test %d passed\n", 12); 2806 } 2807 2808 /* test deactivation of device */ 2809 static void __init of_unittest_overlay_i2c_13(void) 2810 { 2811 int ret; 2812 2813 EXPECT_BEGIN(KERN_INFO, 2814 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2815 2816 /* device should disable */ 2817 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); 2818 2819 EXPECT_END(KERN_INFO, 2820 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2821 2822 if (ret) 2823 return; 2824 2825 unittest(1, "overlay test %d passed\n", 13); 2826 } 2827 2828 /* just check for i2c mux existence */ 2829 static void of_unittest_overlay_i2c_14(void) 2830 { 2831 } 2832 2833 static void __init of_unittest_overlay_i2c_15(void) 2834 { 2835 int ret; 2836 2837 /* device should enable */ 2838 EXPECT_BEGIN(KERN_INFO, 2839 "i2c i2c-1: Added multiplexed i2c bus 3"); 2840 2841 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY); 2842 2843 EXPECT_END(KERN_INFO, 2844 "i2c i2c-1: Added multiplexed i2c bus 3"); 2845 2846 if (ret) 2847 return; 2848 2849 unittest(1, "overlay test %d passed\n", 15); 2850 } 2851 2852 #else 2853 2854 static inline void of_unittest_overlay_i2c_14(void) { } 2855 static inline void of_unittest_overlay_i2c_15(void) { } 2856 2857 #endif 2858 2859 static int of_notify(struct notifier_block *nb, unsigned long action, 2860 void *arg) 2861 { 2862 struct of_overlay_notify_data *nd = arg; 2863 struct device_node *found; 2864 int ret; 2865 2866 /* 2867 * For overlay_16 .. overlay_19, check that returning an error 2868 * works for each of the actions by setting an arbitrary return 2869 * error number that matches the test number. e.g. for unittest16, 2870 * ret = -EBUSY which is -16. 2871 * 2872 * OVERLAY_INFO() for the overlays is declared to expect the same 2873 * error number, so overlay_data_apply() will return no error. 2874 * 2875 * overlay_20 will return NOTIFY_DONE 2876 */ 2877 2878 ret = 0; 2879 of_node_get(nd->overlay); 2880 2881 switch (action) { 2882 2883 case OF_OVERLAY_PRE_APPLY: 2884 found = of_find_node_by_name(nd->overlay, "test-unittest16"); 2885 if (found) { 2886 of_node_put(found); 2887 ret = -EBUSY; 2888 } 2889 break; 2890 2891 case OF_OVERLAY_POST_APPLY: 2892 found = of_find_node_by_name(nd->overlay, "test-unittest17"); 2893 if (found) { 2894 of_node_put(found); 2895 ret = -EEXIST; 2896 } 2897 break; 2898 2899 case OF_OVERLAY_PRE_REMOVE: 2900 found = of_find_node_by_name(nd->overlay, "test-unittest18"); 2901 if (found) { 2902 of_node_put(found); 2903 ret = -EXDEV; 2904 } 2905 break; 2906 2907 case OF_OVERLAY_POST_REMOVE: 2908 found = of_find_node_by_name(nd->overlay, "test-unittest19"); 2909 if (found) { 2910 of_node_put(found); 2911 ret = -ENODEV; 2912 } 2913 break; 2914 2915 default: /* should not happen */ 2916 of_node_put(nd->overlay); 2917 ret = -EINVAL; 2918 break; 2919 } 2920 2921 if (ret) 2922 return notifier_from_errno(ret); 2923 2924 return NOTIFY_DONE; 2925 } 2926 2927 static struct notifier_block of_nb = { 2928 .notifier_call = of_notify, 2929 }; 2930 2931 static void __init of_unittest_overlay_notify(void) 2932 { 2933 int ovcs_id; 2934 int ret; 2935 2936 ret = of_overlay_notifier_register(&of_nb); 2937 unittest(!ret, 2938 "of_overlay_notifier_register() failed, ret = %d\n", ret); 2939 if (ret) 2940 return; 2941 2942 /* 2943 * The overlays are applied by overlay_data_apply() 2944 * instead of of_unittest_apply_overlay() so that they 2945 * will not be tracked. Thus they will not be removed 2946 * by of_unittest_remove_tracked_overlays(). 2947 * 2948 * Applying overlays 16 - 19 will each trigger an error for a 2949 * different action in of_notify(). 2950 * 2951 * Applying overlay 20 will not trigger any error in of_notify(). 2952 */ 2953 2954 /* --- overlay 16 --- */ 2955 2956 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2957 2958 unittest(overlay_data_apply("overlay_16", &ovcs_id), 2959 "test OF_OVERLAY_PRE_APPLY notify injected error\n"); 2960 2961 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2962 2963 unittest(ovcs_id, "ovcs_id not created for overlay_16\n"); 2964 2965 /* --- overlay 17 --- */ 2966 2967 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2968 2969 unittest(overlay_data_apply("overlay_17", &ovcs_id), 2970 "test OF_OVERLAY_POST_APPLY notify injected error\n"); 2971 2972 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2973 2974 unittest(ovcs_id, "ovcs_id not created for overlay_17\n"); 2975 2976 if (ovcs_id) { 2977 ret = of_overlay_remove(&ovcs_id); 2978 unittest(!ret, 2979 "overlay_17 of_overlay_remove(), ret = %d\n", ret); 2980 } 2981 2982 /* --- overlay 18 --- */ 2983 2984 unittest(overlay_data_apply("overlay_18", &ovcs_id), 2985 "OF_OVERLAY_PRE_REMOVE notify injected error\n"); 2986 2987 unittest(ovcs_id, "ovcs_id not created for overlay_18\n"); 2988 2989 if (ovcs_id) { 2990 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 2991 2992 ret = of_overlay_remove(&ovcs_id); 2993 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 2994 if (ret == -EXDEV) { 2995 /* 2996 * change set ovcs_id should still exist 2997 */ 2998 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n"); 2999 } else { 3000 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n"); 3001 } 3002 } else { 3003 unittest(1, "ovcs_id not created for overlay_18\n"); 3004 } 3005 3006 unittest(ovcs_id, "ovcs_id removed for overlay_18\n"); 3007 3008 /* --- overlay 19 --- */ 3009 3010 unittest(overlay_data_apply("overlay_19", &ovcs_id), 3011 "OF_OVERLAY_POST_REMOVE notify injected error\n"); 3012 3013 unittest(ovcs_id, "ovcs_id not created for overlay_19\n"); 3014 3015 if (ovcs_id) { 3016 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3017 ret = of_overlay_remove(&ovcs_id); 3018 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3019 if (ret == -ENODEV) 3020 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n"); 3021 else 3022 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n"); 3023 } else { 3024 unittest(1, "ovcs_id removed for overlay_19\n"); 3025 } 3026 3027 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n", 3028 ovcs_id); 3029 3030 /* --- overlay 20 --- */ 3031 3032 unittest(overlay_data_apply("overlay_20", &ovcs_id), 3033 "overlay notify no injected error\n"); 3034 3035 if (ovcs_id) { 3036 ret = of_overlay_remove(&ovcs_id); 3037 if (ret) 3038 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n", 3039 ret); 3040 } else { 3041 unittest(1, "ovcs_id not created for overlay_20\n"); 3042 } 3043 3044 unittest(!of_overlay_notifier_unregister(&of_nb), 3045 "of_overlay_notifier_unregister() failed, ret = %d\n", ret); 3046 } 3047 3048 static void __init of_unittest_overlay(void) 3049 { 3050 struct device_node *bus_np = NULL; 3051 3052 if (platform_driver_register(&unittest_driver)) { 3053 unittest(0, "could not register unittest driver\n"); 3054 goto out; 3055 } 3056 3057 bus_np = of_find_node_by_path(bus_path); 3058 if (bus_np == NULL) { 3059 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 3060 goto out; 3061 } 3062 3063 if (of_platform_default_populate(bus_np, NULL, NULL)) { 3064 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 3065 goto out; 3066 } 3067 3068 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 3069 unittest(0, "could not find unittest0 @ \"%s\"\n", 3070 unittest_path(100, PDEV_OVERLAY)); 3071 goto out; 3072 } 3073 3074 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 3075 unittest(0, "unittest1 @ \"%s\" should not exist\n", 3076 unittest_path(101, PDEV_OVERLAY)); 3077 goto out; 3078 } 3079 3080 unittest(1, "basic infrastructure of overlays passed"); 3081 3082 /* tests in sequence */ 3083 of_unittest_overlay_0(); 3084 of_unittest_overlay_1(); 3085 of_unittest_overlay_2(); 3086 of_unittest_overlay_3(); 3087 of_unittest_overlay_4(); 3088 of_unittest_overlay_5(); 3089 of_unittest_overlay_6(); 3090 of_unittest_overlay_8(); 3091 3092 of_unittest_overlay_10(); 3093 of_unittest_overlay_11(); 3094 3095 #if IS_BUILTIN(CONFIG_I2C) 3096 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 3097 goto out; 3098 3099 of_unittest_overlay_i2c_12(); 3100 of_unittest_overlay_i2c_13(); 3101 of_unittest_overlay_i2c_14(); 3102 of_unittest_overlay_i2c_15(); 3103 3104 of_unittest_overlay_i2c_cleanup(); 3105 #endif 3106 3107 of_unittest_overlay_gpio(); 3108 3109 of_unittest_remove_tracked_overlays(); 3110 3111 of_unittest_overlay_notify(); 3112 3113 out: 3114 of_node_put(bus_np); 3115 } 3116 3117 #else 3118 static inline void __init of_unittest_overlay(void) { } 3119 #endif 3120 3121 static void __init of_unittest_lifecycle(void) 3122 { 3123 #ifdef CONFIG_OF_DYNAMIC 3124 unsigned int refcount; 3125 int found_refcount_one = 0; 3126 int put_count = 0; 3127 struct device_node *np; 3128 struct device_node *prev_sibling, *next_sibling; 3129 const char *refcount_path = "/testcase-data/refcount-node"; 3130 const char *refcount_parent_path = "/testcase-data"; 3131 3132 /* 3133 * Node lifecycle tests, non-dynamic node: 3134 * 3135 * - Decrementing refcount to zero via of_node_put() should cause the 3136 * attempt to free the node memory by of_node_release() to fail 3137 * because the node is not a dynamic node. 3138 * 3139 * - Decrementing refcount past zero should result in additional 3140 * errors reported. 3141 */ 3142 3143 np = of_find_node_by_path(refcount_path); 3144 unittest(np, "find refcount_path \"%s\"\n", refcount_path); 3145 if (np == NULL) 3146 goto out_skip_tests; 3147 3148 while (!found_refcount_one) { 3149 3150 if (put_count++ > 10) { 3151 unittest(0, "guardrail to avoid infinite loop\n"); 3152 goto out_skip_tests; 3153 } 3154 3155 refcount = kref_read(&np->kobj.kref); 3156 if (refcount == 1) 3157 found_refcount_one = 1; 3158 else 3159 of_node_put(np); 3160 } 3161 3162 EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3163 3164 /* 3165 * refcount is now one, decrementing to zero will result in a call to 3166 * of_node_release() to free the node's memory, which should result 3167 * in an error 3168 */ 3169 unittest(1, "/testcase-data/refcount-node is one"); 3170 of_node_put(np); 3171 3172 EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3173 3174 3175 /* 3176 * expect stack trace for subsequent of_node_put(): 3177 * __refcount_sub_and_test() calls: 3178 * refcount_warn_saturate(r, REFCOUNT_SUB_UAF) 3179 * 3180 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just 3181 * the first three lines, and the last line. 3182 */ 3183 EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3184 EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3185 EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3186 EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3187 3188 /* refcount is now zero, this should fail */ 3189 unittest(1, "/testcase-data/refcount-node is zero"); 3190 of_node_put(np); 3191 3192 EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3193 EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3194 EXPECT_END(KERN_INFO, "WARNING: <<all>>"); 3195 EXPECT_END(KERN_INFO, "------------[ cut here ]------------"); 3196 3197 /* 3198 * Q. do we expect to get yet another warning? 3199 * A. no, the WARNING is from WARN_ONCE() 3200 */ 3201 EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3202 EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3203 EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3204 EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3205 3206 unittest(1, "/testcase-data/refcount-node is zero, second time"); 3207 of_node_put(np); 3208 3209 EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3210 EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3211 EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>"); 3212 EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------"); 3213 3214 /* 3215 * refcount of zero will trigger stack traces from any further 3216 * attempt to of_node_get() node "refcount-node". One example of 3217 * this is where of_unittest_check_node_linkage() will recursively 3218 * scan the tree, with 'for_each_child_of_node()' doing an 3219 * of_node_get() of the children of a node. 3220 * 3221 * Prevent the stack trace by removing node "refcount-node" from 3222 * its parent's child list. 3223 * 3224 * WARNING: EVIL, EVIL, EVIL: 3225 * 3226 * Directly manipulate the child list of node /testcase-data to 3227 * remove child refcount-node. This is ignoring all proper methods 3228 * of removing a child and will leak a small amount of memory. 3229 */ 3230 3231 np = of_find_node_by_path(refcount_parent_path); 3232 unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path); 3233 unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n"); 3234 if (np == NULL) 3235 return; 3236 3237 prev_sibling = np->child; 3238 next_sibling = prev_sibling->sibling; 3239 if (!strcmp(prev_sibling->full_name, "refcount-node")) { 3240 np->child = next_sibling; 3241 next_sibling = next_sibling->sibling; 3242 } 3243 while (next_sibling) { 3244 if (!strcmp(next_sibling->full_name, "refcount-node")) 3245 prev_sibling->sibling = next_sibling->sibling; 3246 prev_sibling = next_sibling; 3247 next_sibling = next_sibling->sibling; 3248 } 3249 of_node_put(np); 3250 3251 return; 3252 3253 out_skip_tests: 3254 #endif 3255 unittest(0, "One or more lifecycle tests skipped\n"); 3256 } 3257 3258 #ifdef CONFIG_OF_OVERLAY 3259 3260 /* 3261 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are 3262 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 3263 */ 3264 3265 #define OVERLAY_INFO_EXTERN(overlay_name) \ 3266 extern uint8_t __dtbo_##overlay_name##_begin[]; \ 3267 extern uint8_t __dtbo_##overlay_name##_end[] 3268 3269 #define OVERLAY_INFO(overlay_name, expected) \ 3270 { .dtbo_begin = __dtbo_##overlay_name##_begin, \ 3271 .dtbo_end = __dtbo_##overlay_name##_end, \ 3272 .expected_result = expected, \ 3273 .name = #overlay_name, \ 3274 } 3275 3276 struct overlay_info { 3277 uint8_t *dtbo_begin; 3278 uint8_t *dtbo_end; 3279 int expected_result; 3280 int ovcs_id; 3281 char *name; 3282 }; 3283 3284 OVERLAY_INFO_EXTERN(overlay_base); 3285 OVERLAY_INFO_EXTERN(overlay); 3286 OVERLAY_INFO_EXTERN(overlay_0); 3287 OVERLAY_INFO_EXTERN(overlay_1); 3288 OVERLAY_INFO_EXTERN(overlay_2); 3289 OVERLAY_INFO_EXTERN(overlay_3); 3290 OVERLAY_INFO_EXTERN(overlay_4); 3291 OVERLAY_INFO_EXTERN(overlay_5); 3292 OVERLAY_INFO_EXTERN(overlay_6); 3293 OVERLAY_INFO_EXTERN(overlay_7); 3294 OVERLAY_INFO_EXTERN(overlay_8); 3295 OVERLAY_INFO_EXTERN(overlay_9); 3296 OVERLAY_INFO_EXTERN(overlay_10); 3297 OVERLAY_INFO_EXTERN(overlay_11); 3298 OVERLAY_INFO_EXTERN(overlay_12); 3299 OVERLAY_INFO_EXTERN(overlay_13); 3300 OVERLAY_INFO_EXTERN(overlay_15); 3301 OVERLAY_INFO_EXTERN(overlay_16); 3302 OVERLAY_INFO_EXTERN(overlay_17); 3303 OVERLAY_INFO_EXTERN(overlay_18); 3304 OVERLAY_INFO_EXTERN(overlay_19); 3305 OVERLAY_INFO_EXTERN(overlay_20); 3306 OVERLAY_INFO_EXTERN(overlay_gpio_01); 3307 OVERLAY_INFO_EXTERN(overlay_gpio_02a); 3308 OVERLAY_INFO_EXTERN(overlay_gpio_02b); 3309 OVERLAY_INFO_EXTERN(overlay_gpio_03); 3310 OVERLAY_INFO_EXTERN(overlay_gpio_04a); 3311 OVERLAY_INFO_EXTERN(overlay_gpio_04b); 3312 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); 3313 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); 3314 OVERLAY_INFO_EXTERN(overlay_bad_phandle); 3315 OVERLAY_INFO_EXTERN(overlay_bad_symbol); 3316 3317 /* entries found by name */ 3318 static struct overlay_info overlays[] = { 3319 OVERLAY_INFO(overlay_base, -9999), 3320 OVERLAY_INFO(overlay, 0), 3321 OVERLAY_INFO(overlay_0, 0), 3322 OVERLAY_INFO(overlay_1, 0), 3323 OVERLAY_INFO(overlay_2, 0), 3324 OVERLAY_INFO(overlay_3, 0), 3325 OVERLAY_INFO(overlay_4, 0), 3326 OVERLAY_INFO(overlay_5, 0), 3327 OVERLAY_INFO(overlay_6, 0), 3328 OVERLAY_INFO(overlay_7, 0), 3329 OVERLAY_INFO(overlay_8, 0), 3330 OVERLAY_INFO(overlay_9, 0), 3331 OVERLAY_INFO(overlay_10, 0), 3332 OVERLAY_INFO(overlay_11, 0), 3333 OVERLAY_INFO(overlay_12, 0), 3334 OVERLAY_INFO(overlay_13, 0), 3335 OVERLAY_INFO(overlay_15, 0), 3336 OVERLAY_INFO(overlay_16, -EBUSY), 3337 OVERLAY_INFO(overlay_17, -EEXIST), 3338 OVERLAY_INFO(overlay_18, 0), 3339 OVERLAY_INFO(overlay_19, 0), 3340 OVERLAY_INFO(overlay_20, 0), 3341 OVERLAY_INFO(overlay_gpio_01, 0), 3342 OVERLAY_INFO(overlay_gpio_02a, 0), 3343 OVERLAY_INFO(overlay_gpio_02b, 0), 3344 OVERLAY_INFO(overlay_gpio_03, 0), 3345 OVERLAY_INFO(overlay_gpio_04a, 0), 3346 OVERLAY_INFO(overlay_gpio_04b, 0), 3347 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), 3348 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), 3349 OVERLAY_INFO(overlay_bad_phandle, -EINVAL), 3350 OVERLAY_INFO(overlay_bad_symbol, -EINVAL), 3351 /* end marker */ 3352 {.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL} 3353 }; 3354 3355 static struct device_node *overlay_base_root; 3356 3357 static void * __init dt_alloc_memory(u64 size, u64 align) 3358 { 3359 void *ptr = memblock_alloc(size, align); 3360 3361 if (!ptr) 3362 panic("%s: Failed to allocate %llu bytes align=0x%llx\n", 3363 __func__, size, align); 3364 3365 return ptr; 3366 } 3367 3368 /* 3369 * Create base device tree for the overlay unittest. 3370 * 3371 * This is called from very early boot code. 3372 * 3373 * Do as much as possible the same way as done in __unflatten_device_tree 3374 * and other early boot steps for the normal FDT so that the overlay base 3375 * unflattened tree will have the same characteristics as the real tree 3376 * (such as having memory allocated by the early allocator). The goal 3377 * is to test "the real thing" as much as possible, and test "test setup 3378 * code" as little as possible. 3379 * 3380 * Have to stop before resolving phandles, because that uses kmalloc. 3381 */ 3382 void __init unittest_unflatten_overlay_base(void) 3383 { 3384 struct overlay_info *info; 3385 u32 data_size; 3386 void *new_fdt; 3387 u32 size; 3388 int found = 0; 3389 const char *overlay_name = "overlay_base"; 3390 3391 for (info = overlays; info && info->name; info++) { 3392 if (!strcmp(overlay_name, info->name)) { 3393 found = 1; 3394 break; 3395 } 3396 } 3397 if (!found) { 3398 pr_err("no overlay data for %s\n", overlay_name); 3399 return; 3400 } 3401 3402 info = &overlays[0]; 3403 3404 if (info->expected_result != -9999) { 3405 pr_err("No dtb 'overlay_base' to attach\n"); 3406 return; 3407 } 3408 3409 data_size = info->dtbo_end - info->dtbo_begin; 3410 if (!data_size) { 3411 pr_err("No dtb 'overlay_base' to attach\n"); 3412 return; 3413 } 3414 3415 size = fdt_totalsize(info->dtbo_begin); 3416 if (size != data_size) { 3417 pr_err("dtb 'overlay_base' header totalsize != actual size"); 3418 return; 3419 } 3420 3421 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); 3422 if (!new_fdt) { 3423 pr_err("alloc for dtb 'overlay_base' failed"); 3424 return; 3425 } 3426 3427 memcpy(new_fdt, info->dtbo_begin, size); 3428 3429 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root, 3430 dt_alloc_memory, true); 3431 } 3432 3433 /* 3434 * The purpose of of_unittest_overlay_data_add is to add an 3435 * overlay in the normal fashion. This is a test of the whole 3436 * picture, instead of testing individual elements. 3437 * 3438 * A secondary purpose is to be able to verify that the contents of 3439 * /proc/device-tree/ contains the updated structure and values from 3440 * the overlay. That must be verified separately in user space. 3441 * 3442 * Return 0 on unexpected error. 3443 */ 3444 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id) 3445 { 3446 struct overlay_info *info; 3447 int found = 0; 3448 int ret; 3449 u32 size; 3450 3451 for (info = overlays; info && info->name; info++) { 3452 if (!strcmp(overlay_name, info->name)) { 3453 found = 1; 3454 break; 3455 } 3456 } 3457 if (!found) { 3458 pr_err("no overlay data for %s\n", overlay_name); 3459 return 0; 3460 } 3461 3462 size = info->dtbo_end - info->dtbo_begin; 3463 if (!size) 3464 pr_err("no overlay data for %s\n", overlay_name); 3465 3466 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id); 3467 if (ovcs_id) 3468 *ovcs_id = info->ovcs_id; 3469 if (ret < 0) 3470 goto out; 3471 3472 pr_debug("%s applied\n", overlay_name); 3473 3474 out: 3475 if (ret != info->expected_result) 3476 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n", 3477 info->expected_result, ret, overlay_name); 3478 3479 return (ret == info->expected_result); 3480 } 3481 3482 /* 3483 * The purpose of of_unittest_overlay_high_level is to add an overlay 3484 * in the normal fashion. This is a test of the whole picture, 3485 * instead of individual elements. 3486 * 3487 * The first part of the function is _not_ normal overlay usage; it is 3488 * finishing splicing the base overlay device tree into the live tree. 3489 */ 3490 static __init void of_unittest_overlay_high_level(void) 3491 { 3492 struct device_node *last_sibling; 3493 struct device_node *np; 3494 struct device_node *of_symbols; 3495 struct device_node *overlay_base_symbols; 3496 struct device_node **pprev; 3497 struct property *prop; 3498 int ret; 3499 3500 if (!overlay_base_root) { 3501 unittest(0, "overlay_base_root not initialized\n"); 3502 return; 3503 } 3504 3505 /* 3506 * Could not fixup phandles in unittest_unflatten_overlay_base() 3507 * because kmalloc() was not yet available. 3508 */ 3509 of_overlay_mutex_lock(); 3510 of_resolve_phandles(overlay_base_root); 3511 of_overlay_mutex_unlock(); 3512 3513 3514 /* 3515 * do not allow overlay_base to duplicate any node already in 3516 * tree, this greatly simplifies the code 3517 */ 3518 3519 /* 3520 * remove overlay_base_root node "__local_fixups", after 3521 * being used by of_resolve_phandles() 3522 */ 3523 pprev = &overlay_base_root->child; 3524 for (np = overlay_base_root->child; np; np = np->sibling) { 3525 if (of_node_name_eq(np, "__local_fixups__")) { 3526 *pprev = np->sibling; 3527 break; 3528 } 3529 pprev = &np->sibling; 3530 } 3531 3532 /* remove overlay_base_root node "__symbols__" if in live tree */ 3533 of_symbols = of_get_child_by_name(of_root, "__symbols__"); 3534 if (of_symbols) { 3535 /* will have to graft properties from node into live tree */ 3536 pprev = &overlay_base_root->child; 3537 for (np = overlay_base_root->child; np; np = np->sibling) { 3538 if (of_node_name_eq(np, "__symbols__")) { 3539 overlay_base_symbols = np; 3540 *pprev = np->sibling; 3541 break; 3542 } 3543 pprev = &np->sibling; 3544 } 3545 } 3546 3547 for_each_child_of_node(overlay_base_root, np) { 3548 struct device_node *base_child; 3549 for_each_child_of_node(of_root, base_child) { 3550 if (!strcmp(np->full_name, base_child->full_name)) { 3551 unittest(0, "illegal node name in overlay_base %pOFn", 3552 np); 3553 of_node_put(np); 3554 of_node_put(base_child); 3555 return; 3556 } 3557 } 3558 } 3559 3560 /* 3561 * overlay 'overlay_base' is not allowed to have root 3562 * properties, so only need to splice nodes into main device tree. 3563 * 3564 * root node of *overlay_base_root will not be freed, it is lost 3565 * memory. 3566 */ 3567 3568 for (np = overlay_base_root->child; np; np = np->sibling) 3569 np->parent = of_root; 3570 3571 mutex_lock(&of_mutex); 3572 3573 for (last_sibling = np = of_root->child; np; np = np->sibling) 3574 last_sibling = np; 3575 3576 if (last_sibling) 3577 last_sibling->sibling = overlay_base_root->child; 3578 else 3579 of_root->child = overlay_base_root->child; 3580 3581 for_each_of_allnodes_from(overlay_base_root, np) 3582 __of_attach_node_sysfs(np); 3583 3584 if (of_symbols) { 3585 struct property *new_prop; 3586 for_each_property_of_node(overlay_base_symbols, prop) { 3587 3588 new_prop = __of_prop_dup(prop, GFP_KERNEL); 3589 if (!new_prop) { 3590 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__", 3591 prop->name); 3592 goto err_unlock; 3593 } 3594 if (__of_add_property(of_symbols, new_prop)) { 3595 kfree(new_prop->name); 3596 kfree(new_prop->value); 3597 kfree(new_prop); 3598 /* "name" auto-generated by unflatten */ 3599 if (!strcmp(prop->name, "name")) 3600 continue; 3601 unittest(0, "duplicate property '%s' in overlay_base node __symbols__", 3602 prop->name); 3603 goto err_unlock; 3604 } 3605 if (__of_add_property_sysfs(of_symbols, new_prop)) { 3606 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs", 3607 prop->name); 3608 goto err_unlock; 3609 } 3610 } 3611 } 3612 3613 mutex_unlock(&of_mutex); 3614 3615 3616 /* now do the normal overlay usage test */ 3617 3618 EXPECT_BEGIN(KERN_ERR, 3619 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3620 EXPECT_BEGIN(KERN_ERR, 3621 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 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@30/incline-up"); 3624 EXPECT_BEGIN(KERN_ERR, 3625 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up"); 3626 EXPECT_BEGIN(KERN_ERR, 3627 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 3628 EXPECT_BEGIN(KERN_ERR, 3629 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3630 EXPECT_BEGIN(KERN_ERR, 3631 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3632 EXPECT_BEGIN(KERN_ERR, 3633 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3634 EXPECT_BEGIN(KERN_ERR, 3635 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3636 EXPECT_BEGIN(KERN_ERR, 3637 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3638 EXPECT_BEGIN(KERN_ERR, 3639 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3640 3641 ret = overlay_data_apply("overlay", NULL); 3642 3643 EXPECT_END(KERN_ERR, 3644 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3645 EXPECT_END(KERN_ERR, 3646 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3647 EXPECT_END(KERN_ERR, 3648 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3649 EXPECT_END(KERN_ERR, 3650 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3651 EXPECT_END(KERN_ERR, 3652 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3653 EXPECT_END(KERN_ERR, 3654 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3655 EXPECT_END(KERN_ERR, 3656 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 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@40/incline-up"); 3659 EXPECT_END(KERN_ERR, 3660 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up"); 3661 EXPECT_END(KERN_ERR, 3662 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 3663 EXPECT_END(KERN_ERR, 3664 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3665 3666 unittest(ret, "Adding overlay 'overlay' failed\n"); 3667 3668 EXPECT_BEGIN(KERN_ERR, 3669 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3670 EXPECT_BEGIN(KERN_ERR, 3671 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3672 3673 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), 3674 "Adding overlay 'overlay_bad_add_dup_node' failed\n"); 3675 3676 EXPECT_END(KERN_ERR, 3677 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3678 EXPECT_END(KERN_ERR, 3679 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3680 3681 EXPECT_BEGIN(KERN_ERR, 3682 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 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/rpm_avail"); 3685 EXPECT_BEGIN(KERN_ERR, 3686 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name"); 3687 3688 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL), 3689 "Adding overlay 'overlay_bad_add_dup_prop' failed\n"); 3690 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/name"); 3693 EXPECT_END(KERN_ERR, 3694 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail"); 3695 EXPECT_END(KERN_ERR, 3696 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 3697 3698 unittest(overlay_data_apply("overlay_bad_phandle", NULL), 3699 "Adding overlay 'overlay_bad_phandle' failed\n"); 3700 3701 unittest(overlay_data_apply("overlay_bad_symbol", NULL), 3702 "Adding overlay 'overlay_bad_symbol' failed\n"); 3703 3704 return; 3705 3706 err_unlock: 3707 mutex_unlock(&of_mutex); 3708 } 3709 3710 #else 3711 3712 static inline __init void of_unittest_overlay_high_level(void) {} 3713 3714 #endif 3715 3716 static int __init of_unittest(void) 3717 { 3718 struct device_node *np; 3719 int res; 3720 3721 pr_info("start of unittest - you will see error messages\n"); 3722 3723 /* Taint the kernel so we know we've run tests. */ 3724 add_taint(TAINT_TEST, LOCKDEP_STILL_OK); 3725 3726 /* adding data for unittest */ 3727 3728 if (IS_ENABLED(CONFIG_UML)) 3729 unittest_unflatten_overlay_base(); 3730 3731 res = unittest_data_add(); 3732 if (res) 3733 return res; 3734 if (!of_aliases) 3735 of_aliases = of_find_node_by_path("/aliases"); 3736 3737 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 3738 if (!np) { 3739 pr_info("No testcase data in device tree; not running tests\n"); 3740 return 0; 3741 } 3742 of_node_put(np); 3743 3744 of_unittest_check_tree_linkage(); 3745 of_unittest_check_phandles(); 3746 of_unittest_find_node_by_name(); 3747 of_unittest_dynamic(); 3748 of_unittest_parse_phandle_with_args(); 3749 of_unittest_parse_phandle_with_args_map(); 3750 of_unittest_printf(); 3751 of_unittest_property_string(); 3752 of_unittest_property_copy(); 3753 of_unittest_changeset(); 3754 of_unittest_parse_interrupts(); 3755 of_unittest_parse_interrupts_extended(); 3756 of_unittest_dma_get_max_cpu_address(); 3757 of_unittest_parse_dma_ranges(); 3758 of_unittest_pci_dma_ranges(); 3759 of_unittest_bus_ranges(); 3760 of_unittest_bus_3cell_ranges(); 3761 of_unittest_reg(); 3762 of_unittest_match_node(); 3763 of_unittest_platform_populate(); 3764 of_unittest_overlay(); 3765 of_unittest_lifecycle(); 3766 3767 /* Double check linkage after removing testcase data */ 3768 of_unittest_check_tree_linkage(); 3769 3770 of_unittest_overlay_high_level(); 3771 3772 pr_info("end of unittest - %i passed, %i failed\n", 3773 unittest_results.passed, unittest_results.failed); 3774 3775 return 0; 3776 } 3777 late_initcall(of_unittest); 3778