1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Self tests for device tree subsystem 4 */ 5 6 #define pr_fmt(fmt) "### dt-test ### " fmt 7 8 #include <linux/memblock.h> 9 #include <linux/clk.h> 10 #include <linux/dma-direct.h> /* to test phys_to_dma/dma_to_phys */ 11 #include <linux/err.h> 12 #include <linux/errno.h> 13 #include <linux/hashtable.h> 14 #include <linux/libfdt.h> 15 #include <linux/of.h> 16 #include <linux/of_address.h> 17 #include <linux/of_fdt.h> 18 #include <linux/of_irq.h> 19 #include <linux/of_platform.h> 20 #include <linux/list.h> 21 #include <linux/mutex.h> 22 #include <linux/slab.h> 23 #include <linux/device.h> 24 #include <linux/platform_device.h> 25 #include <linux/kernel.h> 26 27 #include <linux/i2c.h> 28 #include <linux/i2c-mux.h> 29 #include <linux/gpio/driver.h> 30 31 #include <linux/bitops.h> 32 33 #include "of_private.h" 34 35 static struct unittest_results { 36 int passed; 37 int failed; 38 } unittest_results; 39 40 #define unittest(result, fmt, ...) ({ \ 41 bool failed = !(result); \ 42 if (failed) { \ 43 unittest_results.failed++; \ 44 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 45 } else { \ 46 unittest_results.passed++; \ 47 pr_info("pass %s():%i\n", __func__, __LINE__); \ 48 } \ 49 failed; \ 50 }) 51 52 /* 53 * Expected message may have a message level other than KERN_INFO. 54 * Print the expected message only if the current loglevel will allow 55 * the actual message to print. 56 * 57 * Do not use EXPECT_BEGIN(), EXPECT_END(), EXPECT_NOT_BEGIN(), or 58 * EXPECT_NOT_END() to report messages expected to be reported or not 59 * reported by pr_debug(). 60 */ 61 #define EXPECT_BEGIN(level, fmt, ...) \ 62 printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__) 63 64 #define EXPECT_END(level, fmt, ...) \ 65 printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__) 66 67 #define EXPECT_NOT_BEGIN(level, fmt, ...) \ 68 printk(level pr_fmt("EXPECT_NOT \\ : ") fmt, ##__VA_ARGS__) 69 70 #define EXPECT_NOT_END(level, fmt, ...) \ 71 printk(level pr_fmt("EXPECT_NOT / : ") fmt, ##__VA_ARGS__) 72 73 static void __init of_unittest_find_node_by_name(void) 74 { 75 struct device_node *np; 76 const char *options, *name; 77 78 np = of_find_node_by_path("/testcase-data"); 79 name = kasprintf(GFP_KERNEL, "%pOF", np); 80 unittest(np && !strcmp("/testcase-data", name), 81 "find /testcase-data failed\n"); 82 of_node_put(np); 83 kfree(name); 84 85 /* Test if trailing '/' works */ 86 np = of_find_node_by_path("/testcase-data/"); 87 unittest(!np, "trailing '/' on /testcase-data/ should fail\n"); 88 89 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 90 name = kasprintf(GFP_KERNEL, "%pOF", np); 91 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), 92 "find /testcase-data/phandle-tests/consumer-a failed\n"); 93 of_node_put(np); 94 kfree(name); 95 96 np = of_find_node_by_path("testcase-alias"); 97 name = kasprintf(GFP_KERNEL, "%pOF", np); 98 unittest(np && !strcmp("/testcase-data", name), 99 "find testcase-alias failed\n"); 100 of_node_put(np); 101 kfree(name); 102 103 /* Test if trailing '/' works on aliases */ 104 np = of_find_node_by_path("testcase-alias/"); 105 unittest(!np, "trailing '/' on testcase-alias/ should fail\n"); 106 107 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); 108 name = kasprintf(GFP_KERNEL, "%pOF", np); 109 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), 110 "find testcase-alias/phandle-tests/consumer-a failed\n"); 111 of_node_put(np); 112 kfree(name); 113 114 np = of_find_node_by_path("/testcase-data/missing-path"); 115 unittest(!np, "non-existent path returned node %pOF\n", np); 116 of_node_put(np); 117 118 np = of_find_node_by_path("missing-alias"); 119 unittest(!np, "non-existent alias returned node %pOF\n", np); 120 of_node_put(np); 121 122 np = of_find_node_by_path("testcase-alias/missing-path"); 123 unittest(!np, "non-existent alias with relative path returned node %pOF\n", np); 124 of_node_put(np); 125 126 np = of_find_node_opts_by_path("/testcase-data:testoption", &options); 127 unittest(np && !strcmp("testoption", options), 128 "option path test failed\n"); 129 of_node_put(np); 130 131 np = of_find_node_opts_by_path("/testcase-data:test/option", &options); 132 unittest(np && !strcmp("test/option", options), 133 "option path test, subcase #1 failed\n"); 134 of_node_put(np); 135 136 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options); 137 unittest(np && !strcmp("test/option", options), 138 "option path test, subcase #2 failed\n"); 139 of_node_put(np); 140 141 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); 142 unittest(np, "NULL option path test failed\n"); 143 of_node_put(np); 144 145 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", 146 &options); 147 unittest(np && !strcmp("testaliasoption", options), 148 "option alias path test failed\n"); 149 of_node_put(np); 150 151 np = of_find_node_opts_by_path("testcase-alias:test/alias/option", 152 &options); 153 unittest(np && !strcmp("test/alias/option", options), 154 "option alias path test, subcase #1 failed\n"); 155 of_node_put(np); 156 157 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); 158 unittest(np, "NULL option alias path test failed\n"); 159 of_node_put(np); 160 161 options = "testoption"; 162 np = of_find_node_opts_by_path("testcase-alias", &options); 163 unittest(np && !options, "option clearing test failed\n"); 164 of_node_put(np); 165 166 options = "testoption"; 167 np = of_find_node_opts_by_path("/", &options); 168 unittest(np && !options, "option clearing root node test failed\n"); 169 of_node_put(np); 170 } 171 172 static void __init of_unittest_dynamic(void) 173 { 174 struct device_node *np; 175 struct property *prop; 176 177 np = of_find_node_by_path("/testcase-data"); 178 if (!np) { 179 pr_err("missing testcase data\n"); 180 return; 181 } 182 183 /* Array of 4 properties for the purpose of testing */ 184 prop = kcalloc(4, sizeof(*prop), GFP_KERNEL); 185 if (!prop) { 186 unittest(0, "kzalloc() failed\n"); 187 return; 188 } 189 190 /* Add a new property - should pass*/ 191 prop->name = "new-property"; 192 prop->value = "new-property-data"; 193 prop->length = strlen(prop->value) + 1; 194 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); 195 196 /* Try to add an existing property - should fail */ 197 prop++; 198 prop->name = "new-property"; 199 prop->value = "new-property-data-should-fail"; 200 prop->length = strlen(prop->value) + 1; 201 unittest(of_add_property(np, prop) != 0, 202 "Adding an existing property should have failed\n"); 203 204 /* Try to modify an existing property - should pass */ 205 prop->value = "modify-property-data-should-pass"; 206 prop->length = strlen(prop->value) + 1; 207 unittest(of_update_property(np, prop) == 0, 208 "Updating an existing property should have passed\n"); 209 210 /* Try to modify non-existent property - should pass*/ 211 prop++; 212 prop->name = "modify-property"; 213 prop->value = "modify-missing-property-data-should-pass"; 214 prop->length = strlen(prop->value) + 1; 215 unittest(of_update_property(np, prop) == 0, 216 "Updating a missing property should have passed\n"); 217 218 /* Remove property - should pass */ 219 unittest(of_remove_property(np, prop) == 0, 220 "Removing a property should have passed\n"); 221 222 /* Adding very large property - should pass */ 223 prop++; 224 prop->name = "large-property-PAGE_SIZEx8"; 225 prop->length = PAGE_SIZE * 8; 226 prop->value = kzalloc(prop->length, GFP_KERNEL); 227 unittest(prop->value != NULL, "Unable to allocate large buffer\n"); 228 if (prop->value) 229 unittest(of_add_property(np, prop) == 0, 230 "Adding a large property should have passed\n"); 231 } 232 233 static int __init of_unittest_check_node_linkage(struct device_node *np) 234 { 235 struct device_node *child; 236 int count = 0, rc; 237 238 for_each_child_of_node(np, child) { 239 if (child->parent != np) { 240 pr_err("Child node %pOFn links to wrong parent %pOFn\n", 241 child, np); 242 rc = -EINVAL; 243 goto put_child; 244 } 245 246 rc = of_unittest_check_node_linkage(child); 247 if (rc < 0) 248 goto put_child; 249 count += rc; 250 } 251 252 return count + 1; 253 put_child: 254 of_node_put(child); 255 return rc; 256 } 257 258 static void __init of_unittest_check_tree_linkage(void) 259 { 260 struct device_node *np; 261 int allnode_count = 0, child_count; 262 263 if (!of_root) 264 return; 265 266 for_each_of_allnodes(np) 267 allnode_count++; 268 child_count = of_unittest_check_node_linkage(of_root); 269 270 unittest(child_count > 0, "Device node data structure is corrupted\n"); 271 unittest(child_count == allnode_count, 272 "allnodes list size (%i) doesn't match sibling lists size (%i)\n", 273 allnode_count, child_count); 274 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); 275 } 276 277 static void __init of_unittest_printf_one(struct device_node *np, const char *fmt, 278 const char *expected) 279 { 280 unsigned char *buf; 281 int buf_size; 282 int size, i; 283 284 buf_size = strlen(expected) + 10; 285 buf = kmalloc(buf_size, GFP_KERNEL); 286 if (!buf) 287 return; 288 289 /* Baseline; check conversion with a large size limit */ 290 memset(buf, 0xff, buf_size); 291 size = snprintf(buf, buf_size - 2, fmt, np); 292 293 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */ 294 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff), 295 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n", 296 fmt, expected, buf); 297 298 /* Make sure length limits work */ 299 size++; 300 for (i = 0; i < 2; i++, size--) { 301 /* Clear the buffer, and make sure it works correctly still */ 302 memset(buf, 0xff, buf_size); 303 snprintf(buf, size+1, fmt, np); 304 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff), 305 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n", 306 size, fmt, expected, buf); 307 } 308 kfree(buf); 309 } 310 311 static void __init of_unittest_printf(void) 312 { 313 struct device_node *np; 314 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100"; 315 char phandle_str[16] = ""; 316 317 np = of_find_node_by_path(full_name); 318 if (!np) { 319 unittest(np, "testcase data missing\n"); 320 return; 321 } 322 323 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0); 324 325 of_unittest_printf_one(np, "%pOF", full_name); 326 of_unittest_printf_one(np, "%pOFf", full_name); 327 of_unittest_printf_one(np, "%pOFn", "dev"); 328 of_unittest_printf_one(np, "%2pOFn", "dev"); 329 of_unittest_printf_one(np, "%5pOFn", " dev"); 330 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device"); 331 of_unittest_printf_one(np, "%pOFp", phandle_str); 332 of_unittest_printf_one(np, "%pOFP", "dev@100"); 333 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC"); 334 of_unittest_printf_one(np, "%10pOFP", " dev@100"); 335 of_unittest_printf_one(np, "%-10pOFP", "dev@100 "); 336 of_unittest_printf_one(of_root, "%pOFP", "/"); 337 of_unittest_printf_one(np, "%pOFF", "----"); 338 of_unittest_printf_one(np, "%pOFPF", "dev@100:----"); 339 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device"); 340 of_unittest_printf_one(np, "%pOFc", "test-sub-device"); 341 of_unittest_printf_one(np, "%pOFC", 342 "\"test-sub-device\",\"test-compat2\",\"test-compat3\""); 343 } 344 345 struct node_hash { 346 struct hlist_node node; 347 struct device_node *np; 348 }; 349 350 static DEFINE_HASHTABLE(phandle_ht, 8); 351 static void __init of_unittest_check_phandles(void) 352 { 353 struct device_node *np; 354 struct node_hash *nh; 355 struct hlist_node *tmp; 356 int i, dup_count = 0, phandle_count = 0; 357 358 for_each_of_allnodes(np) { 359 if (!np->phandle) 360 continue; 361 362 hash_for_each_possible(phandle_ht, nh, node, np->phandle) { 363 if (nh->np->phandle == np->phandle) { 364 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n", 365 np->phandle, nh->np, np); 366 dup_count++; 367 break; 368 } 369 } 370 371 nh = kzalloc(sizeof(*nh), GFP_KERNEL); 372 if (!nh) 373 return; 374 375 nh->np = np; 376 hash_add(phandle_ht, &nh->node, np->phandle); 377 phandle_count++; 378 } 379 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n", 380 dup_count, phandle_count); 381 382 /* Clean up */ 383 hash_for_each_safe(phandle_ht, i, tmp, nh, node) { 384 hash_del(&nh->node); 385 kfree(nh); 386 } 387 } 388 389 static void __init of_unittest_parse_phandle_with_args(void) 390 { 391 struct device_node *np; 392 struct of_phandle_args args; 393 int i, rc; 394 395 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 396 if (!np) { 397 pr_err("missing testcase data\n"); 398 return; 399 } 400 401 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 402 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 403 404 for (i = 0; i < 8; i++) { 405 bool passed = true; 406 407 memset(&args, 0, sizeof(args)); 408 rc = of_parse_phandle_with_args(np, "phandle-list", 409 "#phandle-cells", i, &args); 410 411 /* Test the values from tests-phandle.dtsi */ 412 switch (i) { 413 case 0: 414 passed &= !rc; 415 passed &= (args.args_count == 1); 416 passed &= (args.args[0] == (i + 1)); 417 break; 418 case 1: 419 passed &= !rc; 420 passed &= (args.args_count == 2); 421 passed &= (args.args[0] == (i + 1)); 422 passed &= (args.args[1] == 0); 423 break; 424 case 2: 425 passed &= (rc == -ENOENT); 426 break; 427 case 3: 428 passed &= !rc; 429 passed &= (args.args_count == 3); 430 passed &= (args.args[0] == (i + 1)); 431 passed &= (args.args[1] == 4); 432 passed &= (args.args[2] == 3); 433 break; 434 case 4: 435 passed &= !rc; 436 passed &= (args.args_count == 2); 437 passed &= (args.args[0] == (i + 1)); 438 passed &= (args.args[1] == 100); 439 break; 440 case 5: 441 passed &= !rc; 442 passed &= (args.args_count == 0); 443 break; 444 case 6: 445 passed &= !rc; 446 passed &= (args.args_count == 1); 447 passed &= (args.args[0] == (i + 1)); 448 break; 449 case 7: 450 passed &= (rc == -ENOENT); 451 break; 452 default: 453 passed = false; 454 } 455 456 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 457 i, args.np, rc); 458 } 459 460 /* Check for missing list property */ 461 memset(&args, 0, sizeof(args)); 462 rc = of_parse_phandle_with_args(np, "phandle-list-missing", 463 "#phandle-cells", 0, &args); 464 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 465 rc = of_count_phandle_with_args(np, "phandle-list-missing", 466 "#phandle-cells"); 467 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 468 469 /* Check for missing cells property */ 470 memset(&args, 0, sizeof(args)); 471 472 EXPECT_BEGIN(KERN_INFO, 473 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 474 475 rc = of_parse_phandle_with_args(np, "phandle-list", 476 "#phandle-cells-missing", 0, &args); 477 478 EXPECT_END(KERN_INFO, 479 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 480 481 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 482 483 EXPECT_BEGIN(KERN_INFO, 484 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 485 486 rc = of_count_phandle_with_args(np, "phandle-list", 487 "#phandle-cells-missing"); 488 489 EXPECT_END(KERN_INFO, 490 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1"); 491 492 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 493 494 /* Check for bad phandle in list */ 495 memset(&args, 0, sizeof(args)); 496 497 EXPECT_BEGIN(KERN_INFO, 498 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 499 500 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", 501 "#phandle-cells", 0, &args); 502 503 EXPECT_END(KERN_INFO, 504 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 505 506 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 507 508 EXPECT_BEGIN(KERN_INFO, 509 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 510 511 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", 512 "#phandle-cells"); 513 514 EXPECT_END(KERN_INFO, 515 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle"); 516 517 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 518 519 /* Check for incorrectly formed argument list */ 520 memset(&args, 0, sizeof(args)); 521 522 EXPECT_BEGIN(KERN_INFO, 523 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 524 525 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", 526 "#phandle-cells", 1, &args); 527 528 EXPECT_END(KERN_INFO, 529 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 530 531 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 532 533 EXPECT_BEGIN(KERN_INFO, 534 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 535 536 rc = of_count_phandle_with_args(np, "phandle-list-bad-args", 537 "#phandle-cells"); 538 539 EXPECT_END(KERN_INFO, 540 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1"); 541 542 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 543 } 544 545 static void __init of_unittest_parse_phandle_with_args_map(void) 546 { 547 struct device_node *np, *p0, *p1, *p2, *p3; 548 struct of_phandle_args args; 549 int i, rc; 550 551 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b"); 552 if (!np) { 553 pr_err("missing testcase data\n"); 554 return; 555 } 556 557 p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0"); 558 if (!p0) { 559 pr_err("missing testcase data\n"); 560 return; 561 } 562 563 p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1"); 564 if (!p1) { 565 pr_err("missing testcase data\n"); 566 return; 567 } 568 569 p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2"); 570 if (!p2) { 571 pr_err("missing testcase data\n"); 572 return; 573 } 574 575 p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3"); 576 if (!p3) { 577 pr_err("missing testcase data\n"); 578 return; 579 } 580 581 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 582 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 583 584 for (i = 0; i < 8; i++) { 585 bool passed = true; 586 587 memset(&args, 0, sizeof(args)); 588 rc = of_parse_phandle_with_args_map(np, "phandle-list", 589 "phandle", i, &args); 590 591 /* Test the values from tests-phandle.dtsi */ 592 switch (i) { 593 case 0: 594 passed &= !rc; 595 passed &= (args.np == p1); 596 passed &= (args.args_count == 1); 597 passed &= (args.args[0] == 1); 598 break; 599 case 1: 600 passed &= !rc; 601 passed &= (args.np == p3); 602 passed &= (args.args_count == 3); 603 passed &= (args.args[0] == 2); 604 passed &= (args.args[1] == 5); 605 passed &= (args.args[2] == 3); 606 break; 607 case 2: 608 passed &= (rc == -ENOENT); 609 break; 610 case 3: 611 passed &= !rc; 612 passed &= (args.np == p0); 613 passed &= (args.args_count == 0); 614 break; 615 case 4: 616 passed &= !rc; 617 passed &= (args.np == p1); 618 passed &= (args.args_count == 1); 619 passed &= (args.args[0] == 3); 620 break; 621 case 5: 622 passed &= !rc; 623 passed &= (args.np == p0); 624 passed &= (args.args_count == 0); 625 break; 626 case 6: 627 passed &= !rc; 628 passed &= (args.np == p2); 629 passed &= (args.args_count == 2); 630 passed &= (args.args[0] == 15); 631 passed &= (args.args[1] == 0x20); 632 break; 633 case 7: 634 passed &= (rc == -ENOENT); 635 break; 636 default: 637 passed = false; 638 } 639 640 unittest(passed, "index %i - data error on node %s rc=%i\n", 641 i, args.np->full_name, rc); 642 } 643 644 /* Check for missing list property */ 645 memset(&args, 0, sizeof(args)); 646 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing", 647 "phandle", 0, &args); 648 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 649 650 /* Check for missing cells,map,mask property */ 651 memset(&args, 0, sizeof(args)); 652 653 EXPECT_BEGIN(KERN_INFO, 654 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1"); 655 656 rc = of_parse_phandle_with_args_map(np, "phandle-list", 657 "phandle-missing", 0, &args); 658 EXPECT_END(KERN_INFO, 659 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1"); 660 661 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 662 663 /* Check for bad phandle in list */ 664 memset(&args, 0, sizeof(args)); 665 666 EXPECT_BEGIN(KERN_INFO, 667 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle"); 668 669 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle", 670 "phandle", 0, &args); 671 EXPECT_END(KERN_INFO, 672 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle"); 673 674 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 675 676 /* Check for incorrectly formed argument list */ 677 memset(&args, 0, sizeof(args)); 678 679 EXPECT_BEGIN(KERN_INFO, 680 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1"); 681 682 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args", 683 "phandle", 1, &args); 684 EXPECT_END(KERN_INFO, 685 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1"); 686 687 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 688 } 689 690 static void __init of_unittest_property_string(void) 691 { 692 const char *strings[4]; 693 struct device_node *np; 694 int rc; 695 696 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 697 if (!np) { 698 pr_err("No testcase data in device tree\n"); 699 return; 700 } 701 702 rc = of_property_match_string(np, "phandle-list-names", "first"); 703 unittest(rc == 0, "first expected:0 got:%i\n", rc); 704 rc = of_property_match_string(np, "phandle-list-names", "second"); 705 unittest(rc == 1, "second expected:1 got:%i\n", rc); 706 rc = of_property_match_string(np, "phandle-list-names", "third"); 707 unittest(rc == 2, "third expected:2 got:%i\n", rc); 708 rc = of_property_match_string(np, "phandle-list-names", "fourth"); 709 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); 710 rc = of_property_match_string(np, "missing-property", "blah"); 711 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc); 712 rc = of_property_match_string(np, "empty-property", "blah"); 713 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc); 714 rc = of_property_match_string(np, "unterminated-string", "blah"); 715 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 716 717 /* of_property_count_strings() tests */ 718 rc = of_property_count_strings(np, "string-property"); 719 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 720 rc = of_property_count_strings(np, "phandle-list-names"); 721 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 722 rc = of_property_count_strings(np, "unterminated-string"); 723 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 724 rc = of_property_count_strings(np, "unterminated-string-list"); 725 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 726 727 /* of_property_read_string_index() tests */ 728 rc = of_property_read_string_index(np, "string-property", 0, strings); 729 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc); 730 strings[0] = NULL; 731 rc = of_property_read_string_index(np, "string-property", 1, strings); 732 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 733 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings); 734 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 735 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings); 736 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc); 737 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings); 738 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc); 739 strings[0] = NULL; 740 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings); 741 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 742 strings[0] = NULL; 743 rc = of_property_read_string_index(np, "unterminated-string", 0, strings); 744 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 745 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings); 746 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 747 strings[0] = NULL; 748 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */ 749 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 750 strings[1] = NULL; 751 752 /* of_property_read_string_array() tests */ 753 rc = of_property_read_string_array(np, "string-property", strings, 4); 754 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 755 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); 756 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 757 rc = of_property_read_string_array(np, "unterminated-string", strings, 4); 758 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 759 /* -- An incorrectly formed string should cause a failure */ 760 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4); 761 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 762 /* -- parsing the correctly formed strings should still work: */ 763 strings[2] = NULL; 764 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2); 765 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc); 766 strings[1] = NULL; 767 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1); 768 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]); 769 } 770 771 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \ 772 (p1)->value && (p2)->value && \ 773 !memcmp((p1)->value, (p2)->value, (p1)->length) && \ 774 !strcmp((p1)->name, (p2)->name)) 775 static void __init of_unittest_property_copy(void) 776 { 777 #ifdef CONFIG_OF_DYNAMIC 778 struct property p1 = { .name = "p1", .length = 0, .value = "" }; 779 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" }; 780 struct property *new; 781 782 new = __of_prop_dup(&p1, GFP_KERNEL); 783 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n"); 784 kfree(new->value); 785 kfree(new->name); 786 kfree(new); 787 788 new = __of_prop_dup(&p2, GFP_KERNEL); 789 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n"); 790 kfree(new->value); 791 kfree(new->name); 792 kfree(new); 793 #endif 794 } 795 796 static void __init of_unittest_changeset(void) 797 { 798 #ifdef CONFIG_OF_DYNAMIC 799 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" }; 800 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" }; 801 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" }; 802 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" }; 803 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; 804 struct property *ppremove; 805 struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np; 806 struct of_changeset chgset; 807 808 n1 = __of_node_dup(NULL, "n1"); 809 unittest(n1, "testcase setup failure\n"); 810 811 n2 = __of_node_dup(NULL, "n2"); 812 unittest(n2, "testcase setup failure\n"); 813 814 n21 = __of_node_dup(NULL, "n21"); 815 unittest(n21, "testcase setup failure %p\n", n21); 816 817 nchangeset = of_find_node_by_path("/testcase-data/changeset"); 818 nremove = of_get_child_by_name(nchangeset, "node-remove"); 819 unittest(nremove, "testcase setup failure\n"); 820 821 ppadd = __of_prop_dup(&padd, GFP_KERNEL); 822 unittest(ppadd, "testcase setup failure\n"); 823 824 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL); 825 unittest(ppname_n1, "testcase setup failure\n"); 826 827 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL); 828 unittest(ppname_n2, "testcase setup failure\n"); 829 830 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL); 831 unittest(ppname_n21, "testcase setup failure\n"); 832 833 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); 834 unittest(ppupdate, "testcase setup failure\n"); 835 836 parent = nchangeset; 837 n1->parent = parent; 838 n2->parent = parent; 839 n21->parent = n2; 840 841 ppremove = of_find_property(parent, "prop-remove", NULL); 842 unittest(ppremove, "failed to find removal prop"); 843 844 of_changeset_init(&chgset); 845 846 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); 847 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n"); 848 849 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); 850 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n"); 851 852 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); 853 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n"); 854 855 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); 856 857 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n"); 858 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); 859 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); 860 861 unittest(!of_changeset_apply(&chgset), "apply failed\n"); 862 863 of_node_put(nchangeset); 864 865 /* Make sure node names are constructed correctly */ 866 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), 867 "'%pOF' not added\n", n21); 868 of_node_put(np); 869 870 unittest(!of_changeset_revert(&chgset), "revert failed\n"); 871 872 of_changeset_destroy(&chgset); 873 874 of_node_put(n1); 875 of_node_put(n2); 876 of_node_put(n21); 877 #endif 878 } 879 880 static void __init of_unittest_dma_get_max_cpu_address(void) 881 { 882 struct device_node *np; 883 phys_addr_t cpu_addr; 884 885 if (!IS_ENABLED(CONFIG_OF_ADDRESS)) 886 return; 887 888 np = of_find_node_by_path("/testcase-data/address-tests"); 889 if (!np) { 890 pr_err("missing testcase data\n"); 891 return; 892 } 893 894 cpu_addr = of_dma_get_max_cpu_address(np); 895 unittest(cpu_addr == 0x4fffffff, 896 "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n", 897 &cpu_addr, 0x4fffffff); 898 } 899 900 static void __init of_unittest_dma_ranges_one(const char *path, 901 u64 expect_dma_addr, u64 expect_paddr) 902 { 903 #ifdef CONFIG_HAS_DMA 904 struct device_node *np; 905 const struct bus_dma_region *map = NULL; 906 int rc; 907 908 np = of_find_node_by_path(path); 909 if (!np) { 910 pr_err("missing testcase data\n"); 911 return; 912 } 913 914 rc = of_dma_get_range(np, &map); 915 916 unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc); 917 918 if (!rc) { 919 phys_addr_t paddr; 920 dma_addr_t dma_addr; 921 struct device *dev_bogus; 922 923 dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL); 924 if (!dev_bogus) { 925 unittest(0, "kzalloc() failed\n"); 926 kfree(map); 927 return; 928 } 929 930 dev_bogus->dma_range_map = map; 931 paddr = dma_to_phys(dev_bogus, expect_dma_addr); 932 dma_addr = phys_to_dma(dev_bogus, expect_paddr); 933 934 unittest(paddr == expect_paddr, 935 "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n", 936 &paddr, expect_paddr, np); 937 unittest(dma_addr == expect_dma_addr, 938 "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n", 939 &dma_addr, expect_dma_addr, np); 940 941 kfree(map); 942 kfree(dev_bogus); 943 } 944 of_node_put(np); 945 #endif 946 } 947 948 static void __init of_unittest_parse_dma_ranges(void) 949 { 950 of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000", 951 0x0, 0x20000000); 952 if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)) 953 of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000", 954 0x100000000, 0x20000000); 955 of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000", 956 0x80000000, 0x20000000); 957 } 958 959 static void __init of_unittest_pci_dma_ranges(void) 960 { 961 struct device_node *np; 962 struct of_pci_range range; 963 struct of_pci_range_parser parser; 964 int i = 0; 965 966 if (!IS_ENABLED(CONFIG_PCI)) 967 return; 968 969 np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000"); 970 if (!np) { 971 pr_err("missing testcase data\n"); 972 return; 973 } 974 975 if (of_pci_dma_range_parser_init(&parser, np)) { 976 pr_err("missing dma-ranges property\n"); 977 return; 978 } 979 980 /* 981 * Get the dma-ranges from the device tree 982 */ 983 for_each_of_pci_range(&parser, &range) { 984 if (!i) { 985 unittest(range.size == 0x10000000, 986 "for_each_of_pci_range wrong size on node %pOF size=%llx\n", 987 np, range.size); 988 unittest(range.cpu_addr == 0x20000000, 989 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF", 990 range.cpu_addr, np); 991 unittest(range.pci_addr == 0x80000000, 992 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF", 993 range.pci_addr, np); 994 } else { 995 unittest(range.size == 0x10000000, 996 "for_each_of_pci_range wrong size on node %pOF size=%llx\n", 997 np, range.size); 998 unittest(range.cpu_addr == 0x40000000, 999 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF", 1000 range.cpu_addr, np); 1001 unittest(range.pci_addr == 0xc0000000, 1002 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF", 1003 range.pci_addr, np); 1004 } 1005 i++; 1006 } 1007 1008 of_node_put(np); 1009 } 1010 1011 static void __init of_unittest_bus_ranges(void) 1012 { 1013 struct device_node *np; 1014 struct of_range range; 1015 struct of_range_parser parser; 1016 struct resource res; 1017 int ret, count, i = 0; 1018 1019 np = of_find_node_by_path("/testcase-data/address-tests"); 1020 if (!np) { 1021 pr_err("missing testcase data\n"); 1022 return; 1023 } 1024 1025 if (of_range_parser_init(&parser, np)) { 1026 pr_err("missing ranges property\n"); 1027 return; 1028 } 1029 1030 ret = of_range_to_resource(np, 1, &res); 1031 unittest(!ret, "of_range_to_resource returned error (%d) node %pOF\n", 1032 ret, np); 1033 unittest(resource_type(&res) == IORESOURCE_MEM, 1034 "of_range_to_resource wrong resource type on node %pOF res=%pR\n", 1035 np, &res); 1036 unittest(res.start == 0xd0000000, 1037 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n", 1038 np, &res); 1039 unittest(resource_size(&res) == 0x20000000, 1040 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n", 1041 np, &res); 1042 1043 count = of_range_count(&parser); 1044 unittest(count == 2, 1045 "of_range_count wrong size on node %pOF count=%d\n", 1046 np, count); 1047 1048 /* 1049 * Get the "ranges" from the device tree 1050 */ 1051 for_each_of_range(&parser, &range) { 1052 unittest(range.flags == IORESOURCE_MEM, 1053 "for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n", 1054 np, range.flags, IORESOURCE_MEM); 1055 if (!i) { 1056 unittest(range.size == 0x50000000, 1057 "for_each_of_range wrong size on node %pOF size=%llx\n", 1058 np, range.size); 1059 unittest(range.cpu_addr == 0x70000000, 1060 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1061 range.cpu_addr, np); 1062 unittest(range.bus_addr == 0x70000000, 1063 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1064 range.pci_addr, np); 1065 } else { 1066 unittest(range.size == 0x20000000, 1067 "for_each_of_range wrong size on node %pOF size=%llx\n", 1068 np, range.size); 1069 unittest(range.cpu_addr == 0xd0000000, 1070 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1071 range.cpu_addr, np); 1072 unittest(range.bus_addr == 0x00000000, 1073 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1074 range.pci_addr, np); 1075 } 1076 i++; 1077 } 1078 1079 of_node_put(np); 1080 } 1081 1082 static void __init of_unittest_bus_3cell_ranges(void) 1083 { 1084 struct device_node *np; 1085 struct of_range range; 1086 struct of_range_parser parser; 1087 int i = 0; 1088 1089 np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000"); 1090 if (!np) { 1091 pr_err("missing testcase data\n"); 1092 return; 1093 } 1094 1095 if (of_range_parser_init(&parser, np)) { 1096 pr_err("missing ranges property\n"); 1097 return; 1098 } 1099 1100 /* 1101 * Get the "ranges" from the device tree 1102 */ 1103 for_each_of_range(&parser, &range) { 1104 if (!i) { 1105 unittest(range.flags == 0xf00baa, 1106 "for_each_of_range wrong flags on node %pOF flags=%x\n", 1107 np, range.flags); 1108 unittest(range.size == 0x100000, 1109 "for_each_of_range wrong size on node %pOF size=%llx\n", 1110 np, range.size); 1111 unittest(range.cpu_addr == 0xa0000000, 1112 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1113 range.cpu_addr, np); 1114 unittest(range.bus_addr == 0x0, 1115 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1116 range.pci_addr, np); 1117 } else { 1118 unittest(range.flags == 0xf00bee, 1119 "for_each_of_range wrong flags on node %pOF flags=%x\n", 1120 np, range.flags); 1121 unittest(range.size == 0x200000, 1122 "for_each_of_range wrong size on node %pOF size=%llx\n", 1123 np, range.size); 1124 unittest(range.cpu_addr == 0xb0000000, 1125 "for_each_of_range wrong CPU addr (%llx) on node %pOF", 1126 range.cpu_addr, np); 1127 unittest(range.bus_addr == 0x100000000, 1128 "for_each_of_range wrong bus addr (%llx) on node %pOF", 1129 range.pci_addr, np); 1130 } 1131 i++; 1132 } 1133 1134 of_node_put(np); 1135 } 1136 1137 static void __init of_unittest_reg(void) 1138 { 1139 struct device_node *np; 1140 int ret; 1141 u64 addr, size; 1142 1143 np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000"); 1144 if (!np) { 1145 pr_err("missing testcase data\n"); 1146 return; 1147 } 1148 1149 ret = of_property_read_reg(np, 0, &addr, &size); 1150 unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n", 1151 np, ret); 1152 unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n", 1153 np, addr); 1154 1155 of_node_put(np); 1156 } 1157 1158 static void __init of_unittest_parse_interrupts(void) 1159 { 1160 struct device_node *np; 1161 struct of_phandle_args args; 1162 int i, rc; 1163 1164 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 1165 return; 1166 1167 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); 1168 if (!np) { 1169 pr_err("missing testcase data\n"); 1170 return; 1171 } 1172 1173 for (i = 0; i < 4; i++) { 1174 bool passed = true; 1175 1176 memset(&args, 0, sizeof(args)); 1177 rc = of_irq_parse_one(np, i, &args); 1178 1179 passed &= !rc; 1180 passed &= (args.args_count == 1); 1181 passed &= (args.args[0] == (i + 1)); 1182 1183 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1184 i, args.np, rc); 1185 } 1186 of_node_put(np); 1187 1188 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); 1189 if (!np) { 1190 pr_err("missing testcase data\n"); 1191 return; 1192 } 1193 1194 for (i = 0; i < 4; i++) { 1195 bool passed = true; 1196 1197 memset(&args, 0, sizeof(args)); 1198 rc = of_irq_parse_one(np, i, &args); 1199 1200 /* Test the values from tests-phandle.dtsi */ 1201 switch (i) { 1202 case 0: 1203 passed &= !rc; 1204 passed &= (args.args_count == 1); 1205 passed &= (args.args[0] == 9); 1206 break; 1207 case 1: 1208 passed &= !rc; 1209 passed &= (args.args_count == 3); 1210 passed &= (args.args[0] == 10); 1211 passed &= (args.args[1] == 11); 1212 passed &= (args.args[2] == 12); 1213 break; 1214 case 2: 1215 passed &= !rc; 1216 passed &= (args.args_count == 2); 1217 passed &= (args.args[0] == 13); 1218 passed &= (args.args[1] == 14); 1219 break; 1220 case 3: 1221 passed &= !rc; 1222 passed &= (args.args_count == 2); 1223 passed &= (args.args[0] == 15); 1224 passed &= (args.args[1] == 16); 1225 break; 1226 default: 1227 passed = false; 1228 } 1229 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1230 i, args.np, rc); 1231 } 1232 of_node_put(np); 1233 } 1234 1235 static void __init of_unittest_parse_interrupts_extended(void) 1236 { 1237 struct device_node *np; 1238 struct of_phandle_args args; 1239 int i, rc; 1240 1241 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 1242 return; 1243 1244 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); 1245 if (!np) { 1246 pr_err("missing testcase data\n"); 1247 return; 1248 } 1249 1250 for (i = 0; i < 7; i++) { 1251 bool passed = true; 1252 1253 memset(&args, 0, sizeof(args)); 1254 rc = of_irq_parse_one(np, i, &args); 1255 1256 /* Test the values from tests-phandle.dtsi */ 1257 switch (i) { 1258 case 0: 1259 passed &= !rc; 1260 passed &= (args.args_count == 1); 1261 passed &= (args.args[0] == 1); 1262 break; 1263 case 1: 1264 passed &= !rc; 1265 passed &= (args.args_count == 3); 1266 passed &= (args.args[0] == 2); 1267 passed &= (args.args[1] == 3); 1268 passed &= (args.args[2] == 4); 1269 break; 1270 case 2: 1271 passed &= !rc; 1272 passed &= (args.args_count == 2); 1273 passed &= (args.args[0] == 5); 1274 passed &= (args.args[1] == 6); 1275 break; 1276 case 3: 1277 passed &= !rc; 1278 passed &= (args.args_count == 1); 1279 passed &= (args.args[0] == 9); 1280 break; 1281 case 4: 1282 passed &= !rc; 1283 passed &= (args.args_count == 3); 1284 passed &= (args.args[0] == 10); 1285 passed &= (args.args[1] == 11); 1286 passed &= (args.args[2] == 12); 1287 break; 1288 case 5: 1289 passed &= !rc; 1290 passed &= (args.args_count == 2); 1291 passed &= (args.args[0] == 13); 1292 passed &= (args.args[1] == 14); 1293 break; 1294 case 6: 1295 /* 1296 * Tests child node that is missing property 1297 * #address-cells. See the comments in 1298 * drivers/of/unittest-data/tests-interrupts.dtsi 1299 * nodes intmap1 and interrupts-extended0 1300 */ 1301 passed &= !rc; 1302 passed &= (args.args_count == 1); 1303 passed &= (args.args[0] == 15); 1304 break; 1305 default: 1306 passed = false; 1307 } 1308 1309 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1310 i, args.np, rc); 1311 } 1312 of_node_put(np); 1313 } 1314 1315 static const struct of_device_id match_node_table[] = { 1316 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ 1317 { .data = "B", .type = "type1", }, /* followed by type alone */ 1318 1319 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ 1320 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ 1321 { .data = "Cc", .name = "name2", .type = "type2", }, 1322 1323 { .data = "E", .compatible = "compat3" }, 1324 { .data = "G", .compatible = "compat2", }, 1325 { .data = "H", .compatible = "compat2", .name = "name5", }, 1326 { .data = "I", .compatible = "compat2", .type = "type1", }, 1327 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, 1328 { .data = "K", .compatible = "compat2", .name = "name9", }, 1329 {} 1330 }; 1331 1332 static struct { 1333 const char *path; 1334 const char *data; 1335 } match_node_tests[] = { 1336 { .path = "/testcase-data/match-node/name0", .data = "A", }, 1337 { .path = "/testcase-data/match-node/name1", .data = "B", }, 1338 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, 1339 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, 1340 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, 1341 { .path = "/testcase-data/match-node/name3", .data = "E", }, 1342 { .path = "/testcase-data/match-node/name4", .data = "G", }, 1343 { .path = "/testcase-data/match-node/name5", .data = "H", }, 1344 { .path = "/testcase-data/match-node/name6", .data = "G", }, 1345 { .path = "/testcase-data/match-node/name7", .data = "I", }, 1346 { .path = "/testcase-data/match-node/name8", .data = "J", }, 1347 { .path = "/testcase-data/match-node/name9", .data = "K", }, 1348 }; 1349 1350 static void __init of_unittest_match_node(void) 1351 { 1352 struct device_node *np; 1353 const struct of_device_id *match; 1354 int i; 1355 1356 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { 1357 np = of_find_node_by_path(match_node_tests[i].path); 1358 if (!np) { 1359 unittest(0, "missing testcase node %s\n", 1360 match_node_tests[i].path); 1361 continue; 1362 } 1363 1364 match = of_match_node(match_node_table, np); 1365 if (!match) { 1366 unittest(0, "%s didn't match anything\n", 1367 match_node_tests[i].path); 1368 continue; 1369 } 1370 1371 if (strcmp(match->data, match_node_tests[i].data) != 0) { 1372 unittest(0, "%s got wrong match. expected %s, got %s\n", 1373 match_node_tests[i].path, match_node_tests[i].data, 1374 (const char *)match->data); 1375 continue; 1376 } 1377 unittest(1, "passed"); 1378 } 1379 } 1380 1381 static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2); 1382 static const struct platform_device_info test_bus_info = { 1383 .name = "unittest-bus", 1384 }; 1385 static void __init of_unittest_platform_populate(void) 1386 { 1387 int irq, rc; 1388 struct device_node *np, *child, *grandchild; 1389 struct platform_device *pdev, *test_bus; 1390 const struct of_device_id match[] = { 1391 { .compatible = "test-device", }, 1392 {} 1393 }; 1394 1395 np = of_find_node_by_path("/testcase-data"); 1396 of_platform_default_populate(np, NULL, NULL); 1397 1398 /* Test that a missing irq domain returns -EPROBE_DEFER */ 1399 np = of_find_node_by_path("/testcase-data/testcase-device1"); 1400 pdev = of_find_device_by_node(np); 1401 unittest(pdev, "device 1 creation failed\n"); 1402 1403 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) { 1404 irq = platform_get_irq(pdev, 0); 1405 unittest(irq == -EPROBE_DEFER, 1406 "device deferred probe failed - %d\n", irq); 1407 1408 /* Test that a parsing failure does not return -EPROBE_DEFER */ 1409 np = of_find_node_by_path("/testcase-data/testcase-device2"); 1410 pdev = of_find_device_by_node(np); 1411 unittest(pdev, "device 2 creation failed\n"); 1412 1413 EXPECT_BEGIN(KERN_INFO, 1414 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found"); 1415 1416 irq = platform_get_irq(pdev, 0); 1417 1418 EXPECT_END(KERN_INFO, 1419 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found"); 1420 1421 unittest(irq < 0 && irq != -EPROBE_DEFER, 1422 "device parsing error failed - %d\n", irq); 1423 } 1424 1425 np = of_find_node_by_path("/testcase-data/platform-tests"); 1426 unittest(np, "No testcase data in device tree\n"); 1427 if (!np) 1428 return; 1429 1430 test_bus = platform_device_register_full(&test_bus_info); 1431 rc = PTR_ERR_OR_ZERO(test_bus); 1432 unittest(!rc, "testbus registration failed; rc=%i\n", rc); 1433 if (rc) { 1434 of_node_put(np); 1435 return; 1436 } 1437 test_bus->dev.of_node = np; 1438 1439 /* 1440 * Add a dummy resource to the test bus node after it is 1441 * registered to catch problems with un-inserted resources. The 1442 * DT code doesn't insert the resources, and it has caused the 1443 * kernel to oops in the past. This makes sure the same bug 1444 * doesn't crop up again. 1445 */ 1446 platform_device_add_resources(test_bus, &test_bus_res, 1); 1447 1448 of_platform_populate(np, match, NULL, &test_bus->dev); 1449 for_each_child_of_node(np, child) { 1450 for_each_child_of_node(child, grandchild) { 1451 pdev = of_find_device_by_node(grandchild); 1452 unittest(pdev, 1453 "Could not create device for node '%pOFn'\n", 1454 grandchild); 1455 platform_device_put(pdev); 1456 } 1457 } 1458 1459 of_platform_depopulate(&test_bus->dev); 1460 for_each_child_of_node(np, child) { 1461 for_each_child_of_node(child, grandchild) 1462 unittest(!of_find_device_by_node(grandchild), 1463 "device didn't get destroyed '%pOFn'\n", 1464 grandchild); 1465 } 1466 1467 platform_device_unregister(test_bus); 1468 of_node_put(np); 1469 } 1470 1471 /** 1472 * update_node_properties - adds the properties 1473 * of np into dup node (present in live tree) and 1474 * updates parent of children of np to dup. 1475 * 1476 * @np: node whose properties are being added to the live tree 1477 * @dup: node present in live tree to be updated 1478 */ 1479 static void update_node_properties(struct device_node *np, 1480 struct device_node *dup) 1481 { 1482 struct property *prop; 1483 struct property *save_next; 1484 struct device_node *child; 1485 int ret; 1486 1487 for_each_child_of_node(np, child) 1488 child->parent = dup; 1489 1490 /* 1491 * "unittest internal error: unable to add testdata property" 1492 * 1493 * If this message reports a property in node '/__symbols__' then 1494 * the respective unittest overlay contains a label that has the 1495 * same name as a label in the live devicetree. The label will 1496 * be in the live devicetree only if the devicetree source was 1497 * compiled with the '-@' option. If you encounter this error, 1498 * please consider renaming __all__ of the labels in the unittest 1499 * overlay dts files with an odd prefix that is unlikely to be 1500 * used in a real devicetree. 1501 */ 1502 1503 /* 1504 * open code for_each_property_of_node() because of_add_property() 1505 * sets prop->next to NULL 1506 */ 1507 for (prop = np->properties; prop != NULL; prop = save_next) { 1508 save_next = prop->next; 1509 ret = of_add_property(dup, prop); 1510 if (ret) { 1511 if (ret == -EEXIST && !strcmp(prop->name, "name")) 1512 continue; 1513 pr_err("unittest internal error: unable to add testdata property %pOF/%s", 1514 np, prop->name); 1515 } 1516 } 1517 } 1518 1519 /** 1520 * attach_node_and_children - attaches nodes 1521 * and its children to live tree. 1522 * CAUTION: misleading function name - if node @np already exists in 1523 * the live tree then children of @np are *not* attached to the live 1524 * tree. This works for the current test devicetree nodes because such 1525 * nodes do not have child nodes. 1526 * 1527 * @np: Node to attach to live tree 1528 */ 1529 static void attach_node_and_children(struct device_node *np) 1530 { 1531 struct device_node *next, *dup, *child; 1532 unsigned long flags; 1533 const char *full_name; 1534 1535 full_name = kasprintf(GFP_KERNEL, "%pOF", np); 1536 1537 if (!strcmp(full_name, "/__local_fixups__") || 1538 !strcmp(full_name, "/__fixups__")) { 1539 kfree(full_name); 1540 return; 1541 } 1542 1543 dup = of_find_node_by_path(full_name); 1544 kfree(full_name); 1545 if (dup) { 1546 update_node_properties(np, dup); 1547 return; 1548 } 1549 1550 child = np->child; 1551 np->child = NULL; 1552 1553 mutex_lock(&of_mutex); 1554 raw_spin_lock_irqsave(&devtree_lock, flags); 1555 np->sibling = np->parent->child; 1556 np->parent->child = np; 1557 of_node_clear_flag(np, OF_DETACHED); 1558 raw_spin_unlock_irqrestore(&devtree_lock, flags); 1559 1560 __of_attach_node_sysfs(np); 1561 mutex_unlock(&of_mutex); 1562 1563 while (child) { 1564 next = child->sibling; 1565 attach_node_and_children(child); 1566 child = next; 1567 } 1568 } 1569 1570 /** 1571 * unittest_data_add - Reads, copies data from 1572 * linked tree and attaches it to the live tree 1573 */ 1574 static int __init unittest_data_add(void) 1575 { 1576 void *unittest_data; 1577 void *unittest_data_align; 1578 struct device_node *unittest_data_node = NULL, *np; 1579 /* 1580 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically 1581 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 1582 */ 1583 extern uint8_t __dtbo_testcases_begin[]; 1584 extern uint8_t __dtbo_testcases_end[]; 1585 const int size = __dtbo_testcases_end - __dtbo_testcases_begin; 1586 int rc; 1587 void *ret; 1588 1589 if (!size) { 1590 pr_warn("%s: testcases is empty\n", __func__); 1591 return -ENODATA; 1592 } 1593 1594 /* creating copy */ 1595 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL); 1596 if (!unittest_data) 1597 return -ENOMEM; 1598 1599 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE); 1600 memcpy(unittest_data_align, __dtbo_testcases_begin, size); 1601 1602 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node); 1603 if (!ret) { 1604 pr_warn("%s: unflatten testcases tree failed\n", __func__); 1605 kfree(unittest_data); 1606 return -ENODATA; 1607 } 1608 if (!unittest_data_node) { 1609 pr_warn("%s: testcases tree is empty\n", __func__); 1610 kfree(unittest_data); 1611 return -ENODATA; 1612 } 1613 1614 /* 1615 * This lock normally encloses of_resolve_phandles() 1616 */ 1617 of_overlay_mutex_lock(); 1618 1619 rc = of_resolve_phandles(unittest_data_node); 1620 if (rc) { 1621 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 1622 of_overlay_mutex_unlock(); 1623 return -EINVAL; 1624 } 1625 1626 if (!of_root) { 1627 of_root = unittest_data_node; 1628 for_each_of_allnodes(np) 1629 __of_attach_node_sysfs(np); 1630 of_aliases = of_find_node_by_path("/aliases"); 1631 of_chosen = of_find_node_by_path("/chosen"); 1632 of_overlay_mutex_unlock(); 1633 return 0; 1634 } 1635 1636 EXPECT_BEGIN(KERN_INFO, 1637 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1638 1639 /* attach the sub-tree to live tree */ 1640 np = unittest_data_node->child; 1641 while (np) { 1642 struct device_node *next = np->sibling; 1643 1644 np->parent = of_root; 1645 /* this will clear OF_DETACHED in np and children */ 1646 attach_node_and_children(np); 1647 np = next; 1648 } 1649 1650 EXPECT_END(KERN_INFO, 1651 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\""); 1652 1653 of_overlay_mutex_unlock(); 1654 1655 return 0; 1656 } 1657 1658 #ifdef CONFIG_OF_OVERLAY 1659 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id); 1660 1661 static int unittest_probe(struct platform_device *pdev) 1662 { 1663 struct device *dev = &pdev->dev; 1664 struct device_node *np = dev->of_node; 1665 1666 if (np == NULL) { 1667 dev_err(dev, "No OF data for device\n"); 1668 return -EINVAL; 1669 1670 } 1671 1672 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1673 1674 of_platform_populate(np, NULL, NULL, &pdev->dev); 1675 1676 return 0; 1677 } 1678 1679 static void unittest_remove(struct platform_device *pdev) 1680 { 1681 struct device *dev = &pdev->dev; 1682 struct device_node *np = dev->of_node; 1683 1684 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1685 } 1686 1687 static const struct of_device_id unittest_match[] = { 1688 { .compatible = "unittest", }, 1689 {}, 1690 }; 1691 1692 static struct platform_driver unittest_driver = { 1693 .probe = unittest_probe, 1694 .remove_new = unittest_remove, 1695 .driver = { 1696 .name = "unittest", 1697 .of_match_table = of_match_ptr(unittest_match), 1698 }, 1699 }; 1700 1701 /* get the platform device instantiated at the path */ 1702 static struct platform_device *of_path_to_platform_device(const char *path) 1703 { 1704 struct device_node *np; 1705 struct platform_device *pdev; 1706 1707 np = of_find_node_by_path(path); 1708 if (np == NULL) 1709 return NULL; 1710 1711 pdev = of_find_device_by_node(np); 1712 of_node_put(np); 1713 1714 return pdev; 1715 } 1716 1717 /* find out if a platform device exists at that path */ 1718 static int of_path_platform_device_exists(const char *path) 1719 { 1720 struct platform_device *pdev; 1721 1722 pdev = of_path_to_platform_device(path); 1723 platform_device_put(pdev); 1724 return pdev != NULL; 1725 } 1726 1727 #ifdef CONFIG_OF_GPIO 1728 1729 struct unittest_gpio_dev { 1730 struct gpio_chip chip; 1731 }; 1732 1733 static int unittest_gpio_chip_request_count; 1734 static int unittest_gpio_probe_count; 1735 static int unittest_gpio_probe_pass_count; 1736 1737 static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset) 1738 { 1739 unittest_gpio_chip_request_count++; 1740 1741 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset, 1742 unittest_gpio_chip_request_count); 1743 return 0; 1744 } 1745 1746 static int unittest_gpio_probe(struct platform_device *pdev) 1747 { 1748 struct unittest_gpio_dev *devptr; 1749 int ret; 1750 1751 unittest_gpio_probe_count++; 1752 1753 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL); 1754 if (!devptr) 1755 return -ENOMEM; 1756 1757 platform_set_drvdata(pdev, devptr); 1758 1759 devptr->chip.fwnode = dev_fwnode(&pdev->dev); 1760 devptr->chip.label = "of-unittest-gpio"; 1761 devptr->chip.base = -1; /* dynamic allocation */ 1762 devptr->chip.ngpio = 5; 1763 devptr->chip.request = unittest_gpio_chip_request; 1764 1765 ret = gpiochip_add_data(&devptr->chip, NULL); 1766 1767 unittest(!ret, 1768 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret); 1769 1770 if (!ret) 1771 unittest_gpio_probe_pass_count++; 1772 return ret; 1773 } 1774 1775 static void unittest_gpio_remove(struct platform_device *pdev) 1776 { 1777 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev); 1778 struct device *dev = &pdev->dev; 1779 1780 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode); 1781 1782 if (devptr->chip.base != -1) 1783 gpiochip_remove(&devptr->chip); 1784 1785 kfree(devptr); 1786 } 1787 1788 static const struct of_device_id unittest_gpio_id[] = { 1789 { .compatible = "unittest-gpio", }, 1790 {} 1791 }; 1792 1793 static struct platform_driver unittest_gpio_driver = { 1794 .probe = unittest_gpio_probe, 1795 .remove_new = unittest_gpio_remove, 1796 .driver = { 1797 .name = "unittest-gpio", 1798 .of_match_table = of_match_ptr(unittest_gpio_id), 1799 }, 1800 }; 1801 1802 static void __init of_unittest_overlay_gpio(void) 1803 { 1804 int chip_request_count; 1805 int probe_pass_count; 1806 int ret; 1807 1808 /* 1809 * tests: apply overlays before registering driver 1810 * Similar to installing a driver as a module, the 1811 * driver is registered after applying the overlays. 1812 * 1813 * The overlays are applied by overlay_data_apply() 1814 * instead of of_unittest_apply_overlay() so that they 1815 * will not be tracked. Thus they will not be removed 1816 * by of_unittest_remove_tracked_overlays(). 1817 * 1818 * - apply overlay_gpio_01 1819 * - apply overlay_gpio_02a 1820 * - apply overlay_gpio_02b 1821 * - register driver 1822 * 1823 * register driver will result in 1824 * - probe and processing gpio hog for overlay_gpio_01 1825 * - probe for overlay_gpio_02a 1826 * - processing gpio for overlay_gpio_02b 1827 */ 1828 1829 probe_pass_count = unittest_gpio_probe_pass_count; 1830 chip_request_count = unittest_gpio_chip_request_count; 1831 1832 /* 1833 * overlay_gpio_01 contains gpio node and child gpio hog node 1834 * overlay_gpio_02a contains gpio node 1835 * overlay_gpio_02b contains child gpio hog node 1836 */ 1837 1838 unittest(overlay_data_apply("overlay_gpio_01", NULL), 1839 "Adding overlay 'overlay_gpio_01' failed\n"); 1840 1841 unittest(overlay_data_apply("overlay_gpio_02a", NULL), 1842 "Adding overlay 'overlay_gpio_02a' failed\n"); 1843 1844 unittest(overlay_data_apply("overlay_gpio_02b", NULL), 1845 "Adding overlay 'overlay_gpio_02b' failed\n"); 1846 1847 /* 1848 * messages are the result of the probes, after the 1849 * driver is registered 1850 */ 1851 1852 EXPECT_BEGIN(KERN_INFO, 1853 "gpio-<<int>> (line-B-input): hogged as input\n"); 1854 1855 EXPECT_BEGIN(KERN_INFO, 1856 "gpio-<<int>> (line-A-input): hogged as input\n"); 1857 1858 ret = platform_driver_register(&unittest_gpio_driver); 1859 if (unittest(ret == 0, "could not register unittest gpio driver\n")) 1860 return; 1861 1862 EXPECT_END(KERN_INFO, 1863 "gpio-<<int>> (line-A-input): hogged as input\n"); 1864 EXPECT_END(KERN_INFO, 1865 "gpio-<<int>> (line-B-input): hogged as input\n"); 1866 1867 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count, 1868 "unittest_gpio_probe() failed or not called\n"); 1869 1870 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count, 1871 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1872 unittest_gpio_chip_request_count - chip_request_count); 1873 1874 /* 1875 * tests: apply overlays after registering driver 1876 * 1877 * Similar to a driver built-in to the kernel, the 1878 * driver is registered before applying the overlays. 1879 * 1880 * overlay_gpio_03 contains gpio node and child gpio hog node 1881 * 1882 * - apply overlay_gpio_03 1883 * 1884 * apply overlay will result in 1885 * - probe and processing gpio hog. 1886 */ 1887 1888 probe_pass_count = unittest_gpio_probe_pass_count; 1889 chip_request_count = unittest_gpio_chip_request_count; 1890 1891 EXPECT_BEGIN(KERN_INFO, 1892 "gpio-<<int>> (line-D-input): hogged as input\n"); 1893 1894 /* overlay_gpio_03 contains gpio node and child gpio hog node */ 1895 1896 unittest(overlay_data_apply("overlay_gpio_03", NULL), 1897 "Adding overlay 'overlay_gpio_03' failed\n"); 1898 1899 EXPECT_END(KERN_INFO, 1900 "gpio-<<int>> (line-D-input): hogged as input\n"); 1901 1902 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1903 "unittest_gpio_probe() failed or not called\n"); 1904 1905 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1906 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1907 unittest_gpio_chip_request_count - chip_request_count); 1908 1909 /* 1910 * overlay_gpio_04a contains gpio node 1911 * 1912 * - apply overlay_gpio_04a 1913 * 1914 * apply the overlay will result in 1915 * - probe for overlay_gpio_04a 1916 */ 1917 1918 probe_pass_count = unittest_gpio_probe_pass_count; 1919 chip_request_count = unittest_gpio_chip_request_count; 1920 1921 /* overlay_gpio_04a contains gpio node */ 1922 1923 unittest(overlay_data_apply("overlay_gpio_04a", NULL), 1924 "Adding overlay 'overlay_gpio_04a' failed\n"); 1925 1926 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count, 1927 "unittest_gpio_probe() failed or not called\n"); 1928 1929 /* 1930 * overlay_gpio_04b contains child gpio hog node 1931 * 1932 * - apply overlay_gpio_04b 1933 * 1934 * apply the overlay will result in 1935 * - processing gpio for overlay_gpio_04b 1936 */ 1937 1938 EXPECT_BEGIN(KERN_INFO, 1939 "gpio-<<int>> (line-C-input): hogged as input\n"); 1940 1941 /* overlay_gpio_04b contains child gpio hog node */ 1942 1943 unittest(overlay_data_apply("overlay_gpio_04b", NULL), 1944 "Adding overlay 'overlay_gpio_04b' failed\n"); 1945 1946 EXPECT_END(KERN_INFO, 1947 "gpio-<<int>> (line-C-input): hogged as input\n"); 1948 1949 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count, 1950 "unittest_gpio_chip_request() called %d times (expected 1 time)\n", 1951 unittest_gpio_chip_request_count - chip_request_count); 1952 } 1953 1954 #else 1955 1956 static void __init of_unittest_overlay_gpio(void) 1957 { 1958 /* skip tests */ 1959 } 1960 1961 #endif 1962 1963 #if IS_BUILTIN(CONFIG_I2C) 1964 1965 /* get the i2c client device instantiated at the path */ 1966 static struct i2c_client *of_path_to_i2c_client(const char *path) 1967 { 1968 struct device_node *np; 1969 struct i2c_client *client; 1970 1971 np = of_find_node_by_path(path); 1972 if (np == NULL) 1973 return NULL; 1974 1975 client = of_find_i2c_device_by_node(np); 1976 of_node_put(np); 1977 1978 return client; 1979 } 1980 1981 /* find out if a i2c client device exists at that path */ 1982 static int of_path_i2c_client_exists(const char *path) 1983 { 1984 struct i2c_client *client; 1985 1986 client = of_path_to_i2c_client(path); 1987 if (client) 1988 put_device(&client->dev); 1989 return client != NULL; 1990 } 1991 #else 1992 static int of_path_i2c_client_exists(const char *path) 1993 { 1994 return 0; 1995 } 1996 #endif 1997 1998 enum overlay_type { 1999 PDEV_OVERLAY, 2000 I2C_OVERLAY 2001 }; 2002 2003 static int of_path_device_type_exists(const char *path, 2004 enum overlay_type ovtype) 2005 { 2006 switch (ovtype) { 2007 case PDEV_OVERLAY: 2008 return of_path_platform_device_exists(path); 2009 case I2C_OVERLAY: 2010 return of_path_i2c_client_exists(path); 2011 } 2012 return 0; 2013 } 2014 2015 static const char *unittest_path(int nr, enum overlay_type ovtype) 2016 { 2017 const char *base; 2018 static char buf[256]; 2019 2020 switch (ovtype) { 2021 case PDEV_OVERLAY: 2022 base = "/testcase-data/overlay-node/test-bus"; 2023 break; 2024 case I2C_OVERLAY: 2025 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 2026 break; 2027 default: 2028 buf[0] = '\0'; 2029 return buf; 2030 } 2031 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 2032 buf[sizeof(buf) - 1] = '\0'; 2033 return buf; 2034 } 2035 2036 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 2037 { 2038 const char *path; 2039 2040 path = unittest_path(unittest_nr, ovtype); 2041 2042 switch (ovtype) { 2043 case PDEV_OVERLAY: 2044 return of_path_platform_device_exists(path); 2045 case I2C_OVERLAY: 2046 return of_path_i2c_client_exists(path); 2047 } 2048 return 0; 2049 } 2050 2051 static const char *overlay_name_from_nr(int nr) 2052 { 2053 static char buf[256]; 2054 2055 snprintf(buf, sizeof(buf) - 1, 2056 "overlay_%d", nr); 2057 buf[sizeof(buf) - 1] = '\0'; 2058 2059 return buf; 2060 } 2061 2062 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 2063 2064 #define MAX_TRACK_OVCS_IDS 256 2065 2066 static int track_ovcs_id[MAX_TRACK_OVCS_IDS]; 2067 static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS]; 2068 static int track_ovcs_id_cnt; 2069 2070 static void of_unittest_track_overlay(int ovcs_id, int overlay_nr) 2071 { 2072 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS)) 2073 return; 2074 2075 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id; 2076 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr; 2077 track_ovcs_id_cnt++; 2078 } 2079 2080 static void of_unittest_untrack_overlay(int ovcs_id) 2081 { 2082 if (WARN_ON(track_ovcs_id_cnt < 1)) 2083 return; 2084 2085 track_ovcs_id_cnt--; 2086 2087 /* If out of synch then test is broken. Do not try to recover. */ 2088 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id); 2089 } 2090 2091 static void of_unittest_remove_tracked_overlays(void) 2092 { 2093 int ret, ovcs_id, overlay_nr, save_ovcs_id; 2094 const char *overlay_name; 2095 2096 while (track_ovcs_id_cnt > 0) { 2097 2098 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1]; 2099 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1]; 2100 save_ovcs_id = ovcs_id; 2101 ret = of_overlay_remove(&ovcs_id); 2102 if (ret == -ENODEV) { 2103 overlay_name = overlay_name_from_nr(overlay_nr); 2104 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n", 2105 __func__, overlay_name, ret); 2106 } 2107 of_unittest_untrack_overlay(save_ovcs_id); 2108 } 2109 2110 } 2111 2112 static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id) 2113 { 2114 /* 2115 * The overlay will be tracked, thus it will be removed 2116 * by of_unittest_remove_tracked_overlays(). 2117 */ 2118 2119 const char *overlay_name; 2120 2121 overlay_name = overlay_name_from_nr(overlay_nr); 2122 2123 if (!overlay_data_apply(overlay_name, ovcs_id)) { 2124 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2125 return -EFAULT; 2126 } 2127 of_unittest_track_overlay(*ovcs_id, overlay_nr); 2128 2129 return 0; 2130 } 2131 2132 /* apply an overlay while checking before and after states */ 2133 static int __init of_unittest_apply_overlay_check(int overlay_nr, 2134 int unittest_nr, int before, int after, 2135 enum overlay_type ovtype) 2136 { 2137 int ret, ovcs_id; 2138 2139 /* unittest device must not be in before state */ 2140 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2141 unittest(0, "%s with device @\"%s\" %s\n", 2142 overlay_name_from_nr(overlay_nr), 2143 unittest_path(unittest_nr, ovtype), 2144 !before ? "enabled" : "disabled"); 2145 return -EINVAL; 2146 } 2147 2148 ovcs_id = 0; 2149 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2150 if (ret != 0) { 2151 /* of_unittest_apply_overlay already called unittest() */ 2152 return ret; 2153 } 2154 2155 /* unittest device must be to set to after state */ 2156 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2157 unittest(0, "%s failed to create @\"%s\" %s\n", 2158 overlay_name_from_nr(overlay_nr), 2159 unittest_path(unittest_nr, ovtype), 2160 !after ? "enabled" : "disabled"); 2161 return -EINVAL; 2162 } 2163 2164 return 0; 2165 } 2166 2167 /* apply an overlay and then revert it while checking before, after states */ 2168 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, 2169 int unittest_nr, int before, int after, 2170 enum overlay_type ovtype) 2171 { 2172 int ret, ovcs_id, save_ovcs_id; 2173 2174 /* unittest device must be in before state */ 2175 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 2176 unittest(0, "%s with device @\"%s\" %s\n", 2177 overlay_name_from_nr(overlay_nr), 2178 unittest_path(unittest_nr, ovtype), 2179 !before ? "enabled" : "disabled"); 2180 return -EINVAL; 2181 } 2182 2183 /* apply the overlay */ 2184 ovcs_id = 0; 2185 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 2186 if (ret != 0) { 2187 /* of_unittest_apply_overlay already called unittest() */ 2188 return ret; 2189 } 2190 2191 /* unittest device must be in after state */ 2192 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 2193 unittest(0, "%s failed to create @\"%s\" %s\n", 2194 overlay_name_from_nr(overlay_nr), 2195 unittest_path(unittest_nr, ovtype), 2196 !after ? "enabled" : "disabled"); 2197 return -EINVAL; 2198 } 2199 2200 save_ovcs_id = ovcs_id; 2201 ret = of_overlay_remove(&ovcs_id); 2202 if (ret != 0) { 2203 unittest(0, "%s failed to be destroyed @\"%s\"\n", 2204 overlay_name_from_nr(overlay_nr), 2205 unittest_path(unittest_nr, ovtype)); 2206 return ret; 2207 } 2208 of_unittest_untrack_overlay(save_ovcs_id); 2209 2210 /* unittest device must be again in before state */ 2211 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 2212 unittest(0, "%s with device @\"%s\" %s\n", 2213 overlay_name_from_nr(overlay_nr), 2214 unittest_path(unittest_nr, ovtype), 2215 !before ? "enabled" : "disabled"); 2216 return -EINVAL; 2217 } 2218 2219 return 0; 2220 } 2221 2222 /* test activation of device */ 2223 static void __init of_unittest_overlay_0(void) 2224 { 2225 int ret; 2226 2227 EXPECT_BEGIN(KERN_INFO, 2228 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2229 2230 /* device should enable */ 2231 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); 2232 2233 EXPECT_END(KERN_INFO, 2234 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status"); 2235 2236 if (ret) 2237 return; 2238 2239 unittest(1, "overlay test %d passed\n", 0); 2240 } 2241 2242 /* test deactivation of device */ 2243 static void __init of_unittest_overlay_1(void) 2244 { 2245 int ret; 2246 2247 EXPECT_BEGIN(KERN_INFO, 2248 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2249 2250 /* device should disable */ 2251 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); 2252 2253 EXPECT_END(KERN_INFO, 2254 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status"); 2255 2256 if (ret) 2257 return; 2258 2259 unittest(1, "overlay test %d passed\n", 1); 2260 2261 } 2262 2263 /* test activation of device */ 2264 static void __init of_unittest_overlay_2(void) 2265 { 2266 int ret; 2267 2268 EXPECT_BEGIN(KERN_INFO, 2269 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2270 2271 /* device should enable */ 2272 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); 2273 2274 EXPECT_END(KERN_INFO, 2275 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status"); 2276 2277 if (ret) 2278 return; 2279 unittest(1, "overlay test %d passed\n", 2); 2280 } 2281 2282 /* test deactivation of device */ 2283 static void __init of_unittest_overlay_3(void) 2284 { 2285 int ret; 2286 2287 EXPECT_BEGIN(KERN_INFO, 2288 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2289 2290 /* device should disable */ 2291 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); 2292 2293 EXPECT_END(KERN_INFO, 2294 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status"); 2295 2296 if (ret) 2297 return; 2298 2299 unittest(1, "overlay test %d passed\n", 3); 2300 } 2301 2302 /* test activation of a full device node */ 2303 static void __init of_unittest_overlay_4(void) 2304 { 2305 /* device should disable */ 2306 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY)) 2307 return; 2308 2309 unittest(1, "overlay test %d passed\n", 4); 2310 } 2311 2312 /* test overlay apply/revert sequence */ 2313 static void __init of_unittest_overlay_5(void) 2314 { 2315 int ret; 2316 2317 EXPECT_BEGIN(KERN_INFO, 2318 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2319 2320 /* device should disable */ 2321 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); 2322 2323 EXPECT_END(KERN_INFO, 2324 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status"); 2325 2326 if (ret) 2327 return; 2328 2329 unittest(1, "overlay test %d passed\n", 5); 2330 } 2331 2332 /* test overlay application in sequence */ 2333 static void __init of_unittest_overlay_6(void) 2334 { 2335 int i, save_ovcs_id[2], ovcs_id; 2336 int overlay_nr = 6, unittest_nr = 6; 2337 int before = 0, after = 1; 2338 const char *overlay_name; 2339 2340 int ret; 2341 2342 /* unittest device must be in before state */ 2343 for (i = 0; i < 2; i++) { 2344 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2345 != before) { 2346 unittest(0, "%s with device @\"%s\" %s\n", 2347 overlay_name_from_nr(overlay_nr + i), 2348 unittest_path(unittest_nr + i, 2349 PDEV_OVERLAY), 2350 !before ? "enabled" : "disabled"); 2351 return; 2352 } 2353 } 2354 2355 /* apply the overlays */ 2356 2357 EXPECT_BEGIN(KERN_INFO, 2358 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2359 2360 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2361 2362 ret = overlay_data_apply(overlay_name, &ovcs_id); 2363 2364 if (!ret) { 2365 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2366 return; 2367 } 2368 save_ovcs_id[0] = ovcs_id; 2369 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2370 2371 EXPECT_END(KERN_INFO, 2372 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status"); 2373 2374 EXPECT_BEGIN(KERN_INFO, 2375 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2376 2377 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2378 2379 ret = overlay_data_apply(overlay_name, &ovcs_id); 2380 2381 if (!ret) { 2382 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2383 return; 2384 } 2385 save_ovcs_id[1] = ovcs_id; 2386 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2387 2388 EXPECT_END(KERN_INFO, 2389 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status"); 2390 2391 2392 for (i = 0; i < 2; i++) { 2393 /* unittest device must be in after state */ 2394 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2395 != after) { 2396 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 2397 overlay_name_from_nr(overlay_nr + i), 2398 unittest_path(unittest_nr + i, 2399 PDEV_OVERLAY), 2400 !after ? "enabled" : "disabled"); 2401 return; 2402 } 2403 } 2404 2405 for (i = 1; i >= 0; i--) { 2406 ovcs_id = save_ovcs_id[i]; 2407 if (of_overlay_remove(&ovcs_id)) { 2408 unittest(0, "%s failed destroy @\"%s\"\n", 2409 overlay_name_from_nr(overlay_nr + i), 2410 unittest_path(unittest_nr + i, 2411 PDEV_OVERLAY)); 2412 return; 2413 } 2414 of_unittest_untrack_overlay(save_ovcs_id[i]); 2415 } 2416 2417 for (i = 0; i < 2; i++) { 2418 /* unittest device must be again in before state */ 2419 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 2420 != before) { 2421 unittest(0, "%s with device @\"%s\" %s\n", 2422 overlay_name_from_nr(overlay_nr + i), 2423 unittest_path(unittest_nr + i, 2424 PDEV_OVERLAY), 2425 !before ? "enabled" : "disabled"); 2426 return; 2427 } 2428 } 2429 2430 unittest(1, "overlay test %d passed\n", 6); 2431 2432 } 2433 2434 /* test overlay application in sequence */ 2435 static void __init of_unittest_overlay_8(void) 2436 { 2437 int i, save_ovcs_id[2], ovcs_id; 2438 int overlay_nr = 8, unittest_nr = 8; 2439 const char *overlay_name; 2440 int ret; 2441 2442 /* we don't care about device state in this test */ 2443 2444 EXPECT_BEGIN(KERN_INFO, 2445 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status"); 2446 2447 overlay_name = overlay_name_from_nr(overlay_nr + 0); 2448 2449 ret = overlay_data_apply(overlay_name, &ovcs_id); 2450 if (!ret) 2451 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2452 2453 EXPECT_END(KERN_INFO, 2454 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status"); 2455 2456 if (!ret) 2457 return; 2458 2459 save_ovcs_id[0] = ovcs_id; 2460 of_unittest_track_overlay(ovcs_id, overlay_nr + 0); 2461 2462 overlay_name = overlay_name_from_nr(overlay_nr + 1); 2463 2464 EXPECT_BEGIN(KERN_INFO, 2465 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2466 2467 /* apply the overlays */ 2468 ret = overlay_data_apply(overlay_name, &ovcs_id); 2469 2470 EXPECT_END(KERN_INFO, 2471 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo"); 2472 2473 if (!ret) { 2474 unittest(0, "could not apply overlay \"%s\"\n", overlay_name); 2475 return; 2476 } 2477 2478 save_ovcs_id[1] = ovcs_id; 2479 of_unittest_track_overlay(ovcs_id, overlay_nr + 1); 2480 2481 /* now try to remove first overlay (it should fail) */ 2482 ovcs_id = save_ovcs_id[0]; 2483 2484 EXPECT_BEGIN(KERN_INFO, 2485 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2486 2487 EXPECT_BEGIN(KERN_INFO, 2488 "OF: overlay: overlay #6 is not topmost"); 2489 2490 ret = of_overlay_remove(&ovcs_id); 2491 2492 EXPECT_END(KERN_INFO, 2493 "OF: overlay: overlay #6 is not topmost"); 2494 2495 EXPECT_END(KERN_INFO, 2496 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8"); 2497 2498 if (!ret) { 2499 /* 2500 * Should never get here. If we do, expect a lot of 2501 * subsequent tracking and overlay removal related errors. 2502 */ 2503 unittest(0, "%s was destroyed @\"%s\"\n", 2504 overlay_name_from_nr(overlay_nr + 0), 2505 unittest_path(unittest_nr, 2506 PDEV_OVERLAY)); 2507 return; 2508 } 2509 2510 /* removing them in order should work */ 2511 for (i = 1; i >= 0; i--) { 2512 ovcs_id = save_ovcs_id[i]; 2513 if (of_overlay_remove(&ovcs_id)) { 2514 unittest(0, "%s not destroyed @\"%s\"\n", 2515 overlay_name_from_nr(overlay_nr + i), 2516 unittest_path(unittest_nr, 2517 PDEV_OVERLAY)); 2518 return; 2519 } 2520 of_unittest_untrack_overlay(save_ovcs_id[i]); 2521 } 2522 2523 unittest(1, "overlay test %d passed\n", 8); 2524 } 2525 2526 /* test insertion of a bus with parent devices */ 2527 static void __init of_unittest_overlay_10(void) 2528 { 2529 int ret; 2530 char *child_path; 2531 2532 /* device should disable */ 2533 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 2534 2535 if (unittest(ret == 0, 2536 "overlay test %d failed; overlay application\n", 10)) 2537 return; 2538 2539 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 2540 unittest_path(10, PDEV_OVERLAY)); 2541 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 2542 return; 2543 2544 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 2545 kfree(child_path); 2546 2547 unittest(ret, "overlay test %d failed; no child device\n", 10); 2548 } 2549 2550 /* test insertion of a bus with parent devices (and revert) */ 2551 static void __init of_unittest_overlay_11(void) 2552 { 2553 int ret; 2554 2555 /* device should disable */ 2556 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 2557 PDEV_OVERLAY); 2558 2559 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11); 2560 } 2561 2562 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 2563 2564 struct unittest_i2c_bus_data { 2565 struct platform_device *pdev; 2566 struct i2c_adapter adap; 2567 }; 2568 2569 static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 2570 struct i2c_msg *msgs, int num) 2571 { 2572 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 2573 2574 (void)std; 2575 2576 return num; 2577 } 2578 2579 static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 2580 { 2581 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 2582 } 2583 2584 static const struct i2c_algorithm unittest_i2c_algo = { 2585 .master_xfer = unittest_i2c_master_xfer, 2586 .functionality = unittest_i2c_functionality, 2587 }; 2588 2589 static int unittest_i2c_bus_probe(struct platform_device *pdev) 2590 { 2591 struct device *dev = &pdev->dev; 2592 struct device_node *np = dev->of_node; 2593 struct unittest_i2c_bus_data *std; 2594 struct i2c_adapter *adap; 2595 int ret; 2596 2597 if (np == NULL) { 2598 dev_err(dev, "No OF data for device\n"); 2599 return -EINVAL; 2600 2601 } 2602 2603 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2604 2605 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 2606 if (!std) 2607 return -ENOMEM; 2608 2609 /* link them together */ 2610 std->pdev = pdev; 2611 platform_set_drvdata(pdev, std); 2612 2613 adap = &std->adap; 2614 i2c_set_adapdata(adap, std); 2615 adap->nr = -1; 2616 strscpy(adap->name, pdev->name, sizeof(adap->name)); 2617 adap->class = I2C_CLASS_DEPRECATED; 2618 adap->algo = &unittest_i2c_algo; 2619 adap->dev.parent = dev; 2620 adap->dev.of_node = dev->of_node; 2621 adap->timeout = 5 * HZ; 2622 adap->retries = 3; 2623 2624 ret = i2c_add_numbered_adapter(adap); 2625 if (ret != 0) { 2626 dev_err(dev, "Failed to add I2C adapter\n"); 2627 return ret; 2628 } 2629 2630 return 0; 2631 } 2632 2633 static void unittest_i2c_bus_remove(struct platform_device *pdev) 2634 { 2635 struct device *dev = &pdev->dev; 2636 struct device_node *np = dev->of_node; 2637 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 2638 2639 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2640 i2c_del_adapter(&std->adap); 2641 } 2642 2643 static const struct of_device_id unittest_i2c_bus_match[] = { 2644 { .compatible = "unittest-i2c-bus", }, 2645 {}, 2646 }; 2647 2648 static struct platform_driver unittest_i2c_bus_driver = { 2649 .probe = unittest_i2c_bus_probe, 2650 .remove_new = unittest_i2c_bus_remove, 2651 .driver = { 2652 .name = "unittest-i2c-bus", 2653 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 2654 }, 2655 }; 2656 2657 static int unittest_i2c_dev_probe(struct i2c_client *client) 2658 { 2659 struct device *dev = &client->dev; 2660 struct device_node *np = client->dev.of_node; 2661 2662 if (!np) { 2663 dev_err(dev, "No OF node\n"); 2664 return -EINVAL; 2665 } 2666 2667 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2668 2669 return 0; 2670 }; 2671 2672 static void unittest_i2c_dev_remove(struct i2c_client *client) 2673 { 2674 struct device *dev = &client->dev; 2675 struct device_node *np = client->dev.of_node; 2676 2677 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2678 } 2679 2680 static const struct i2c_device_id unittest_i2c_dev_id[] = { 2681 { .name = "unittest-i2c-dev" }, 2682 { } 2683 }; 2684 2685 static struct i2c_driver unittest_i2c_dev_driver = { 2686 .driver = { 2687 .name = "unittest-i2c-dev", 2688 }, 2689 .probe_new = unittest_i2c_dev_probe, 2690 .remove = unittest_i2c_dev_remove, 2691 .id_table = unittest_i2c_dev_id, 2692 }; 2693 2694 #if IS_BUILTIN(CONFIG_I2C_MUX) 2695 2696 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) 2697 { 2698 return 0; 2699 } 2700 2701 static int unittest_i2c_mux_probe(struct i2c_client *client) 2702 { 2703 int i, nchans; 2704 struct device *dev = &client->dev; 2705 struct i2c_adapter *adap = client->adapter; 2706 struct device_node *np = client->dev.of_node, *child; 2707 struct i2c_mux_core *muxc; 2708 u32 reg, max_reg; 2709 2710 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2711 2712 if (!np) { 2713 dev_err(dev, "No OF node\n"); 2714 return -EINVAL; 2715 } 2716 2717 max_reg = (u32)-1; 2718 for_each_child_of_node(np, child) { 2719 if (of_property_read_u32(child, "reg", ®)) 2720 continue; 2721 if (max_reg == (u32)-1 || reg > max_reg) 2722 max_reg = reg; 2723 } 2724 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 2725 if (nchans == 0) { 2726 dev_err(dev, "No channels\n"); 2727 return -EINVAL; 2728 } 2729 2730 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0, 2731 unittest_i2c_mux_select_chan, NULL); 2732 if (!muxc) 2733 return -ENOMEM; 2734 for (i = 0; i < nchans; i++) { 2735 if (i2c_mux_add_adapter(muxc, 0, i, 0)) { 2736 dev_err(dev, "Failed to register mux #%d\n", i); 2737 i2c_mux_del_adapters(muxc); 2738 return -ENODEV; 2739 } 2740 } 2741 2742 i2c_set_clientdata(client, muxc); 2743 2744 return 0; 2745 }; 2746 2747 static void unittest_i2c_mux_remove(struct i2c_client *client) 2748 { 2749 struct device *dev = &client->dev; 2750 struct device_node *np = client->dev.of_node; 2751 struct i2c_mux_core *muxc = i2c_get_clientdata(client); 2752 2753 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2754 i2c_mux_del_adapters(muxc); 2755 } 2756 2757 static const struct i2c_device_id unittest_i2c_mux_id[] = { 2758 { .name = "unittest-i2c-mux" }, 2759 { } 2760 }; 2761 2762 static struct i2c_driver unittest_i2c_mux_driver = { 2763 .driver = { 2764 .name = "unittest-i2c-mux", 2765 }, 2766 .probe_new = unittest_i2c_mux_probe, 2767 .remove = unittest_i2c_mux_remove, 2768 .id_table = unittest_i2c_mux_id, 2769 }; 2770 2771 #endif 2772 2773 static int of_unittest_overlay_i2c_init(void) 2774 { 2775 int ret; 2776 2777 ret = i2c_add_driver(&unittest_i2c_dev_driver); 2778 if (unittest(ret == 0, 2779 "could not register unittest i2c device driver\n")) 2780 return ret; 2781 2782 ret = platform_driver_register(&unittest_i2c_bus_driver); 2783 2784 if (unittest(ret == 0, 2785 "could not register unittest i2c bus driver\n")) 2786 return ret; 2787 2788 #if IS_BUILTIN(CONFIG_I2C_MUX) 2789 2790 EXPECT_BEGIN(KERN_INFO, 2791 "i2c i2c-1: Added multiplexed i2c bus 2"); 2792 2793 ret = i2c_add_driver(&unittest_i2c_mux_driver); 2794 2795 EXPECT_END(KERN_INFO, 2796 "i2c i2c-1: Added multiplexed i2c bus 2"); 2797 2798 if (unittest(ret == 0, 2799 "could not register unittest i2c mux driver\n")) 2800 return ret; 2801 #endif 2802 2803 return 0; 2804 } 2805 2806 static void of_unittest_overlay_i2c_cleanup(void) 2807 { 2808 #if IS_BUILTIN(CONFIG_I2C_MUX) 2809 i2c_del_driver(&unittest_i2c_mux_driver); 2810 #endif 2811 platform_driver_unregister(&unittest_i2c_bus_driver); 2812 i2c_del_driver(&unittest_i2c_dev_driver); 2813 } 2814 2815 static void __init of_unittest_overlay_i2c_12(void) 2816 { 2817 int ret; 2818 2819 /* device should enable */ 2820 EXPECT_BEGIN(KERN_INFO, 2821 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2822 2823 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); 2824 2825 EXPECT_END(KERN_INFO, 2826 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status"); 2827 2828 if (ret) 2829 return; 2830 2831 unittest(1, "overlay test %d passed\n", 12); 2832 } 2833 2834 /* test deactivation of device */ 2835 static void __init of_unittest_overlay_i2c_13(void) 2836 { 2837 int ret; 2838 2839 EXPECT_BEGIN(KERN_INFO, 2840 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2841 2842 /* device should disable */ 2843 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); 2844 2845 EXPECT_END(KERN_INFO, 2846 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status"); 2847 2848 if (ret) 2849 return; 2850 2851 unittest(1, "overlay test %d passed\n", 13); 2852 } 2853 2854 /* just check for i2c mux existence */ 2855 static void of_unittest_overlay_i2c_14(void) 2856 { 2857 } 2858 2859 static void __init of_unittest_overlay_i2c_15(void) 2860 { 2861 int ret; 2862 2863 /* device should enable */ 2864 EXPECT_BEGIN(KERN_INFO, 2865 "i2c i2c-1: Added multiplexed i2c bus 3"); 2866 2867 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY); 2868 2869 EXPECT_END(KERN_INFO, 2870 "i2c i2c-1: Added multiplexed i2c bus 3"); 2871 2872 if (ret) 2873 return; 2874 2875 unittest(1, "overlay test %d passed\n", 15); 2876 } 2877 2878 #else 2879 2880 static inline void of_unittest_overlay_i2c_14(void) { } 2881 static inline void of_unittest_overlay_i2c_15(void) { } 2882 2883 #endif 2884 2885 static int of_notify(struct notifier_block *nb, unsigned long action, 2886 void *arg) 2887 { 2888 struct of_overlay_notify_data *nd = arg; 2889 struct device_node *found; 2890 int ret; 2891 2892 /* 2893 * For overlay_16 .. overlay_19, check that returning an error 2894 * works for each of the actions by setting an arbitrary return 2895 * error number that matches the test number. e.g. for unittest16, 2896 * ret = -EBUSY which is -16. 2897 * 2898 * OVERLAY_INFO() for the overlays is declared to expect the same 2899 * error number, so overlay_data_apply() will return no error. 2900 * 2901 * overlay_20 will return NOTIFY_DONE 2902 */ 2903 2904 ret = 0; 2905 of_node_get(nd->overlay); 2906 2907 switch (action) { 2908 2909 case OF_OVERLAY_PRE_APPLY: 2910 found = of_find_node_by_name(nd->overlay, "test-unittest16"); 2911 if (found) { 2912 of_node_put(found); 2913 ret = -EBUSY; 2914 } 2915 break; 2916 2917 case OF_OVERLAY_POST_APPLY: 2918 found = of_find_node_by_name(nd->overlay, "test-unittest17"); 2919 if (found) { 2920 of_node_put(found); 2921 ret = -EEXIST; 2922 } 2923 break; 2924 2925 case OF_OVERLAY_PRE_REMOVE: 2926 found = of_find_node_by_name(nd->overlay, "test-unittest18"); 2927 if (found) { 2928 of_node_put(found); 2929 ret = -EXDEV; 2930 } 2931 break; 2932 2933 case OF_OVERLAY_POST_REMOVE: 2934 found = of_find_node_by_name(nd->overlay, "test-unittest19"); 2935 if (found) { 2936 of_node_put(found); 2937 ret = -ENODEV; 2938 } 2939 break; 2940 2941 default: /* should not happen */ 2942 of_node_put(nd->overlay); 2943 ret = -EINVAL; 2944 break; 2945 } 2946 2947 if (ret) 2948 return notifier_from_errno(ret); 2949 2950 return NOTIFY_DONE; 2951 } 2952 2953 static struct notifier_block of_nb = { 2954 .notifier_call = of_notify, 2955 }; 2956 2957 static void __init of_unittest_overlay_notify(void) 2958 { 2959 int ovcs_id; 2960 int ret; 2961 2962 ret = of_overlay_notifier_register(&of_nb); 2963 unittest(!ret, 2964 "of_overlay_notifier_register() failed, ret = %d\n", ret); 2965 if (ret) 2966 return; 2967 2968 /* 2969 * The overlays are applied by overlay_data_apply() 2970 * instead of of_unittest_apply_overlay() so that they 2971 * will not be tracked. Thus they will not be removed 2972 * by of_unittest_remove_tracked_overlays(). 2973 * 2974 * Applying overlays 16 - 19 will each trigger an error for a 2975 * different action in of_notify(). 2976 * 2977 * Applying overlay 20 will not trigger any error in of_notify(). 2978 */ 2979 2980 /* --- overlay 16 --- */ 2981 2982 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2983 2984 unittest(overlay_data_apply("overlay_16", &ovcs_id), 2985 "test OF_OVERLAY_PRE_APPLY notify injected error\n"); 2986 2987 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus"); 2988 2989 unittest(ovcs_id, "ovcs_id not created for overlay_16\n"); 2990 2991 /* --- overlay 17 --- */ 2992 2993 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2994 2995 unittest(overlay_data_apply("overlay_17", &ovcs_id), 2996 "test OF_OVERLAY_POST_APPLY notify injected error\n"); 2997 2998 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus"); 2999 3000 unittest(ovcs_id, "ovcs_id not created for overlay_17\n"); 3001 3002 if (ovcs_id) { 3003 ret = of_overlay_remove(&ovcs_id); 3004 unittest(!ret, 3005 "overlay_17 of_overlay_remove(), ret = %d\n", ret); 3006 } 3007 3008 /* --- overlay 18 --- */ 3009 3010 unittest(overlay_data_apply("overlay_18", &ovcs_id), 3011 "OF_OVERLAY_PRE_REMOVE notify injected error\n"); 3012 3013 unittest(ovcs_id, "ovcs_id not created for overlay_18\n"); 3014 3015 if (ovcs_id) { 3016 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 3017 3018 ret = of_overlay_remove(&ovcs_id); 3019 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus"); 3020 if (ret == -EXDEV) { 3021 /* 3022 * change set ovcs_id should still exist 3023 */ 3024 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n"); 3025 } else { 3026 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n"); 3027 } 3028 } else { 3029 unittest(1, "ovcs_id not created for overlay_18\n"); 3030 } 3031 3032 unittest(ovcs_id, "ovcs_id removed for overlay_18\n"); 3033 3034 /* --- overlay 19 --- */ 3035 3036 unittest(overlay_data_apply("overlay_19", &ovcs_id), 3037 "OF_OVERLAY_POST_REMOVE notify injected error\n"); 3038 3039 unittest(ovcs_id, "ovcs_id not created for overlay_19\n"); 3040 3041 if (ovcs_id) { 3042 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3043 ret = of_overlay_remove(&ovcs_id); 3044 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus"); 3045 if (ret == -ENODEV) 3046 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n"); 3047 else 3048 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n"); 3049 } else { 3050 unittest(1, "ovcs_id removed for overlay_19\n"); 3051 } 3052 3053 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n", 3054 ovcs_id); 3055 3056 /* --- overlay 20 --- */ 3057 3058 unittest(overlay_data_apply("overlay_20", &ovcs_id), 3059 "overlay notify no injected error\n"); 3060 3061 if (ovcs_id) { 3062 ret = of_overlay_remove(&ovcs_id); 3063 if (ret) 3064 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n", 3065 ret); 3066 } else { 3067 unittest(1, "ovcs_id not created for overlay_20\n"); 3068 } 3069 3070 unittest(!of_overlay_notifier_unregister(&of_nb), 3071 "of_overlay_notifier_unregister() failed, ret = %d\n", ret); 3072 } 3073 3074 static void __init of_unittest_overlay(void) 3075 { 3076 struct device_node *bus_np = NULL; 3077 3078 if (platform_driver_register(&unittest_driver)) { 3079 unittest(0, "could not register unittest driver\n"); 3080 goto out; 3081 } 3082 3083 bus_np = of_find_node_by_path(bus_path); 3084 if (bus_np == NULL) { 3085 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 3086 goto out; 3087 } 3088 3089 if (of_platform_default_populate(bus_np, NULL, NULL)) { 3090 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 3091 goto out; 3092 } 3093 3094 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 3095 unittest(0, "could not find unittest0 @ \"%s\"\n", 3096 unittest_path(100, PDEV_OVERLAY)); 3097 goto out; 3098 } 3099 3100 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 3101 unittest(0, "unittest1 @ \"%s\" should not exist\n", 3102 unittest_path(101, PDEV_OVERLAY)); 3103 goto out; 3104 } 3105 3106 unittest(1, "basic infrastructure of overlays passed"); 3107 3108 /* tests in sequence */ 3109 of_unittest_overlay_0(); 3110 of_unittest_overlay_1(); 3111 of_unittest_overlay_2(); 3112 of_unittest_overlay_3(); 3113 of_unittest_overlay_4(); 3114 of_unittest_overlay_5(); 3115 of_unittest_overlay_6(); 3116 of_unittest_overlay_8(); 3117 3118 of_unittest_overlay_10(); 3119 of_unittest_overlay_11(); 3120 3121 #if IS_BUILTIN(CONFIG_I2C) 3122 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 3123 goto out; 3124 3125 of_unittest_overlay_i2c_12(); 3126 of_unittest_overlay_i2c_13(); 3127 of_unittest_overlay_i2c_14(); 3128 of_unittest_overlay_i2c_15(); 3129 3130 of_unittest_overlay_i2c_cleanup(); 3131 #endif 3132 3133 of_unittest_overlay_gpio(); 3134 3135 of_unittest_remove_tracked_overlays(); 3136 3137 of_unittest_overlay_notify(); 3138 3139 out: 3140 of_node_put(bus_np); 3141 } 3142 3143 #else 3144 static inline void __init of_unittest_overlay(void) { } 3145 #endif 3146 3147 static void __init of_unittest_lifecycle(void) 3148 { 3149 #ifdef CONFIG_OF_DYNAMIC 3150 unsigned int refcount; 3151 int found_refcount_one = 0; 3152 int put_count = 0; 3153 struct device_node *np; 3154 struct device_node *prev_sibling, *next_sibling; 3155 const char *refcount_path = "/testcase-data/refcount-node"; 3156 const char *refcount_parent_path = "/testcase-data"; 3157 3158 /* 3159 * Node lifecycle tests, non-dynamic node: 3160 * 3161 * - Decrementing refcount to zero via of_node_put() should cause the 3162 * attempt to free the node memory by of_node_release() to fail 3163 * because the node is not a dynamic node. 3164 * 3165 * - Decrementing refcount past zero should result in additional 3166 * errors reported. 3167 */ 3168 3169 np = of_find_node_by_path(refcount_path); 3170 unittest(np, "find refcount_path \"%s\"\n", refcount_path); 3171 if (np == NULL) 3172 goto out_skip_tests; 3173 3174 while (!found_refcount_one) { 3175 3176 if (put_count++ > 10) { 3177 unittest(0, "guardrail to avoid infinite loop\n"); 3178 goto out_skip_tests; 3179 } 3180 3181 refcount = kref_read(&np->kobj.kref); 3182 if (refcount == 1) 3183 found_refcount_one = 1; 3184 else 3185 of_node_put(np); 3186 } 3187 3188 EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3189 3190 /* 3191 * refcount is now one, decrementing to zero will result in a call to 3192 * of_node_release() to free the node's memory, which should result 3193 * in an error 3194 */ 3195 unittest(1, "/testcase-data/refcount-node is one"); 3196 of_node_put(np); 3197 3198 EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node"); 3199 3200 3201 /* 3202 * expect stack trace for subsequent of_node_put(): 3203 * __refcount_sub_and_test() calls: 3204 * refcount_warn_saturate(r, REFCOUNT_SUB_UAF) 3205 * 3206 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just 3207 * the first three lines, and the last line. 3208 */ 3209 EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3210 EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3211 EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3212 EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3213 3214 /* refcount is now zero, this should fail */ 3215 unittest(1, "/testcase-data/refcount-node is zero"); 3216 of_node_put(np); 3217 3218 EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3219 EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3220 EXPECT_END(KERN_INFO, "WARNING: <<all>>"); 3221 EXPECT_END(KERN_INFO, "------------[ cut here ]------------"); 3222 3223 /* 3224 * Q. do we expect to get yet another warning? 3225 * A. no, the WARNING is from WARN_ONCE() 3226 */ 3227 EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------"); 3228 EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>"); 3229 EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free."); 3230 EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---"); 3231 3232 unittest(1, "/testcase-data/refcount-node is zero, second time"); 3233 of_node_put(np); 3234 3235 EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---"); 3236 EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free."); 3237 EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>"); 3238 EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------"); 3239 3240 /* 3241 * refcount of zero will trigger stack traces from any further 3242 * attempt to of_node_get() node "refcount-node". One example of 3243 * this is where of_unittest_check_node_linkage() will recursively 3244 * scan the tree, with 'for_each_child_of_node()' doing an 3245 * of_node_get() of the children of a node. 3246 * 3247 * Prevent the stack trace by removing node "refcount-node" from 3248 * its parent's child list. 3249 * 3250 * WARNING: EVIL, EVIL, EVIL: 3251 * 3252 * Directly manipulate the child list of node /testcase-data to 3253 * remove child refcount-node. This is ignoring all proper methods 3254 * of removing a child and will leak a small amount of memory. 3255 */ 3256 3257 np = of_find_node_by_path(refcount_parent_path); 3258 unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path); 3259 unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n"); 3260 if (np == NULL) 3261 return; 3262 3263 prev_sibling = np->child; 3264 next_sibling = prev_sibling->sibling; 3265 if (!strcmp(prev_sibling->full_name, "refcount-node")) { 3266 np->child = next_sibling; 3267 next_sibling = next_sibling->sibling; 3268 } 3269 while (next_sibling) { 3270 if (!strcmp(next_sibling->full_name, "refcount-node")) 3271 prev_sibling->sibling = next_sibling->sibling; 3272 prev_sibling = next_sibling; 3273 next_sibling = next_sibling->sibling; 3274 } 3275 of_node_put(np); 3276 3277 return; 3278 3279 out_skip_tests: 3280 #endif 3281 unittest(0, "One or more lifecycle tests skipped\n"); 3282 } 3283 3284 #ifdef CONFIG_OF_OVERLAY 3285 3286 /* 3287 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are 3288 * created by cmd_dt_S_dtbo in scripts/Makefile.lib 3289 */ 3290 3291 #define OVERLAY_INFO_EXTERN(overlay_name) \ 3292 extern uint8_t __dtbo_##overlay_name##_begin[]; \ 3293 extern uint8_t __dtbo_##overlay_name##_end[] 3294 3295 #define OVERLAY_INFO(overlay_name, expected) \ 3296 { .dtbo_begin = __dtbo_##overlay_name##_begin, \ 3297 .dtbo_end = __dtbo_##overlay_name##_end, \ 3298 .expected_result = expected, \ 3299 .name = #overlay_name, \ 3300 } 3301 3302 struct overlay_info { 3303 uint8_t *dtbo_begin; 3304 uint8_t *dtbo_end; 3305 int expected_result; 3306 int ovcs_id; 3307 char *name; 3308 }; 3309 3310 OVERLAY_INFO_EXTERN(overlay_base); 3311 OVERLAY_INFO_EXTERN(overlay); 3312 OVERLAY_INFO_EXTERN(overlay_0); 3313 OVERLAY_INFO_EXTERN(overlay_1); 3314 OVERLAY_INFO_EXTERN(overlay_2); 3315 OVERLAY_INFO_EXTERN(overlay_3); 3316 OVERLAY_INFO_EXTERN(overlay_4); 3317 OVERLAY_INFO_EXTERN(overlay_5); 3318 OVERLAY_INFO_EXTERN(overlay_6); 3319 OVERLAY_INFO_EXTERN(overlay_7); 3320 OVERLAY_INFO_EXTERN(overlay_8); 3321 OVERLAY_INFO_EXTERN(overlay_9); 3322 OVERLAY_INFO_EXTERN(overlay_10); 3323 OVERLAY_INFO_EXTERN(overlay_11); 3324 OVERLAY_INFO_EXTERN(overlay_12); 3325 OVERLAY_INFO_EXTERN(overlay_13); 3326 OVERLAY_INFO_EXTERN(overlay_15); 3327 OVERLAY_INFO_EXTERN(overlay_16); 3328 OVERLAY_INFO_EXTERN(overlay_17); 3329 OVERLAY_INFO_EXTERN(overlay_18); 3330 OVERLAY_INFO_EXTERN(overlay_19); 3331 OVERLAY_INFO_EXTERN(overlay_20); 3332 OVERLAY_INFO_EXTERN(overlay_gpio_01); 3333 OVERLAY_INFO_EXTERN(overlay_gpio_02a); 3334 OVERLAY_INFO_EXTERN(overlay_gpio_02b); 3335 OVERLAY_INFO_EXTERN(overlay_gpio_03); 3336 OVERLAY_INFO_EXTERN(overlay_gpio_04a); 3337 OVERLAY_INFO_EXTERN(overlay_gpio_04b); 3338 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); 3339 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); 3340 OVERLAY_INFO_EXTERN(overlay_bad_phandle); 3341 OVERLAY_INFO_EXTERN(overlay_bad_symbol); 3342 3343 /* entries found by name */ 3344 static struct overlay_info overlays[] = { 3345 OVERLAY_INFO(overlay_base, -9999), 3346 OVERLAY_INFO(overlay, 0), 3347 OVERLAY_INFO(overlay_0, 0), 3348 OVERLAY_INFO(overlay_1, 0), 3349 OVERLAY_INFO(overlay_2, 0), 3350 OVERLAY_INFO(overlay_3, 0), 3351 OVERLAY_INFO(overlay_4, 0), 3352 OVERLAY_INFO(overlay_5, 0), 3353 OVERLAY_INFO(overlay_6, 0), 3354 OVERLAY_INFO(overlay_7, 0), 3355 OVERLAY_INFO(overlay_8, 0), 3356 OVERLAY_INFO(overlay_9, 0), 3357 OVERLAY_INFO(overlay_10, 0), 3358 OVERLAY_INFO(overlay_11, 0), 3359 OVERLAY_INFO(overlay_12, 0), 3360 OVERLAY_INFO(overlay_13, 0), 3361 OVERLAY_INFO(overlay_15, 0), 3362 OVERLAY_INFO(overlay_16, -EBUSY), 3363 OVERLAY_INFO(overlay_17, -EEXIST), 3364 OVERLAY_INFO(overlay_18, 0), 3365 OVERLAY_INFO(overlay_19, 0), 3366 OVERLAY_INFO(overlay_20, 0), 3367 OVERLAY_INFO(overlay_gpio_01, 0), 3368 OVERLAY_INFO(overlay_gpio_02a, 0), 3369 OVERLAY_INFO(overlay_gpio_02b, 0), 3370 OVERLAY_INFO(overlay_gpio_03, 0), 3371 OVERLAY_INFO(overlay_gpio_04a, 0), 3372 OVERLAY_INFO(overlay_gpio_04b, 0), 3373 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), 3374 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), 3375 OVERLAY_INFO(overlay_bad_phandle, -EINVAL), 3376 OVERLAY_INFO(overlay_bad_symbol, -EINVAL), 3377 /* end marker */ 3378 {.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL} 3379 }; 3380 3381 static struct device_node *overlay_base_root; 3382 3383 static void * __init dt_alloc_memory(u64 size, u64 align) 3384 { 3385 void *ptr = memblock_alloc(size, align); 3386 3387 if (!ptr) 3388 panic("%s: Failed to allocate %llu bytes align=0x%llx\n", 3389 __func__, size, align); 3390 3391 return ptr; 3392 } 3393 3394 /* 3395 * Create base device tree for the overlay unittest. 3396 * 3397 * This is called from very early boot code. 3398 * 3399 * Do as much as possible the same way as done in __unflatten_device_tree 3400 * and other early boot steps for the normal FDT so that the overlay base 3401 * unflattened tree will have the same characteristics as the real tree 3402 * (such as having memory allocated by the early allocator). The goal 3403 * is to test "the real thing" as much as possible, and test "test setup 3404 * code" as little as possible. 3405 * 3406 * Have to stop before resolving phandles, because that uses kmalloc. 3407 */ 3408 void __init unittest_unflatten_overlay_base(void) 3409 { 3410 struct overlay_info *info; 3411 u32 data_size; 3412 void *new_fdt; 3413 u32 size; 3414 int found = 0; 3415 const char *overlay_name = "overlay_base"; 3416 3417 for (info = overlays; info && info->name; info++) { 3418 if (!strcmp(overlay_name, info->name)) { 3419 found = 1; 3420 break; 3421 } 3422 } 3423 if (!found) { 3424 pr_err("no overlay data for %s\n", overlay_name); 3425 return; 3426 } 3427 3428 info = &overlays[0]; 3429 3430 if (info->expected_result != -9999) { 3431 pr_err("No dtb 'overlay_base' to attach\n"); 3432 return; 3433 } 3434 3435 data_size = info->dtbo_end - info->dtbo_begin; 3436 if (!data_size) { 3437 pr_err("No dtb 'overlay_base' to attach\n"); 3438 return; 3439 } 3440 3441 size = fdt_totalsize(info->dtbo_begin); 3442 if (size != data_size) { 3443 pr_err("dtb 'overlay_base' header totalsize != actual size"); 3444 return; 3445 } 3446 3447 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); 3448 if (!new_fdt) { 3449 pr_err("alloc for dtb 'overlay_base' failed"); 3450 return; 3451 } 3452 3453 memcpy(new_fdt, info->dtbo_begin, size); 3454 3455 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root, 3456 dt_alloc_memory, true); 3457 } 3458 3459 /* 3460 * The purpose of of_unittest_overlay_data_add is to add an 3461 * overlay in the normal fashion. This is a test of the whole 3462 * picture, instead of testing individual elements. 3463 * 3464 * A secondary purpose is to be able to verify that the contents of 3465 * /proc/device-tree/ contains the updated structure and values from 3466 * the overlay. That must be verified separately in user space. 3467 * 3468 * Return 0 on unexpected error. 3469 */ 3470 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id) 3471 { 3472 struct overlay_info *info; 3473 int found = 0; 3474 int ret; 3475 u32 size; 3476 3477 for (info = overlays; info && info->name; info++) { 3478 if (!strcmp(overlay_name, info->name)) { 3479 found = 1; 3480 break; 3481 } 3482 } 3483 if (!found) { 3484 pr_err("no overlay data for %s\n", overlay_name); 3485 return 0; 3486 } 3487 3488 size = info->dtbo_end - info->dtbo_begin; 3489 if (!size) 3490 pr_err("no overlay data for %s\n", overlay_name); 3491 3492 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id); 3493 if (ovcs_id) 3494 *ovcs_id = info->ovcs_id; 3495 if (ret < 0) 3496 goto out; 3497 3498 pr_debug("%s applied\n", overlay_name); 3499 3500 out: 3501 if (ret != info->expected_result) 3502 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n", 3503 info->expected_result, ret, overlay_name); 3504 3505 return (ret == info->expected_result); 3506 } 3507 3508 /* 3509 * The purpose of of_unittest_overlay_high_level is to add an overlay 3510 * in the normal fashion. This is a test of the whole picture, 3511 * instead of individual elements. 3512 * 3513 * The first part of the function is _not_ normal overlay usage; it is 3514 * finishing splicing the base overlay device tree into the live tree. 3515 */ 3516 static __init void of_unittest_overlay_high_level(void) 3517 { 3518 struct device_node *last_sibling; 3519 struct device_node *np; 3520 struct device_node *of_symbols; 3521 struct device_node *overlay_base_symbols; 3522 struct device_node **pprev; 3523 struct property *prop; 3524 int ret; 3525 3526 if (!overlay_base_root) { 3527 unittest(0, "overlay_base_root not initialized\n"); 3528 return; 3529 } 3530 3531 /* 3532 * Could not fixup phandles in unittest_unflatten_overlay_base() 3533 * because kmalloc() was not yet available. 3534 */ 3535 of_overlay_mutex_lock(); 3536 of_resolve_phandles(overlay_base_root); 3537 of_overlay_mutex_unlock(); 3538 3539 3540 /* 3541 * do not allow overlay_base to duplicate any node already in 3542 * tree, this greatly simplifies the code 3543 */ 3544 3545 /* 3546 * remove overlay_base_root node "__local_fixups", after 3547 * being used by of_resolve_phandles() 3548 */ 3549 pprev = &overlay_base_root->child; 3550 for (np = overlay_base_root->child; np; np = np->sibling) { 3551 if (of_node_name_eq(np, "__local_fixups__")) { 3552 *pprev = np->sibling; 3553 break; 3554 } 3555 pprev = &np->sibling; 3556 } 3557 3558 /* remove overlay_base_root node "__symbols__" if in live tree */ 3559 of_symbols = of_get_child_by_name(of_root, "__symbols__"); 3560 if (of_symbols) { 3561 /* will have to graft properties from node into live tree */ 3562 pprev = &overlay_base_root->child; 3563 for (np = overlay_base_root->child; np; np = np->sibling) { 3564 if (of_node_name_eq(np, "__symbols__")) { 3565 overlay_base_symbols = np; 3566 *pprev = np->sibling; 3567 break; 3568 } 3569 pprev = &np->sibling; 3570 } 3571 } 3572 3573 for_each_child_of_node(overlay_base_root, np) { 3574 struct device_node *base_child; 3575 for_each_child_of_node(of_root, base_child) { 3576 if (!strcmp(np->full_name, base_child->full_name)) { 3577 unittest(0, "illegal node name in overlay_base %pOFn", 3578 np); 3579 of_node_put(np); 3580 of_node_put(base_child); 3581 return; 3582 } 3583 } 3584 } 3585 3586 /* 3587 * overlay 'overlay_base' is not allowed to have root 3588 * properties, so only need to splice nodes into main device tree. 3589 * 3590 * root node of *overlay_base_root will not be freed, it is lost 3591 * memory. 3592 */ 3593 3594 for (np = overlay_base_root->child; np; np = np->sibling) 3595 np->parent = of_root; 3596 3597 mutex_lock(&of_mutex); 3598 3599 for (last_sibling = np = of_root->child; np; np = np->sibling) 3600 last_sibling = np; 3601 3602 if (last_sibling) 3603 last_sibling->sibling = overlay_base_root->child; 3604 else 3605 of_root->child = overlay_base_root->child; 3606 3607 for_each_of_allnodes_from(overlay_base_root, np) 3608 __of_attach_node_sysfs(np); 3609 3610 if (of_symbols) { 3611 struct property *new_prop; 3612 for_each_property_of_node(overlay_base_symbols, prop) { 3613 3614 new_prop = __of_prop_dup(prop, GFP_KERNEL); 3615 if (!new_prop) { 3616 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__", 3617 prop->name); 3618 goto err_unlock; 3619 } 3620 if (__of_add_property(of_symbols, new_prop)) { 3621 kfree(new_prop->name); 3622 kfree(new_prop->value); 3623 kfree(new_prop); 3624 /* "name" auto-generated by unflatten */ 3625 if (!strcmp(prop->name, "name")) 3626 continue; 3627 unittest(0, "duplicate property '%s' in overlay_base node __symbols__", 3628 prop->name); 3629 goto err_unlock; 3630 } 3631 if (__of_add_property_sysfs(of_symbols, new_prop)) { 3632 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs", 3633 prop->name); 3634 goto err_unlock; 3635 } 3636 } 3637 } 3638 3639 mutex_unlock(&of_mutex); 3640 3641 3642 /* now do the normal overlay usage test */ 3643 3644 EXPECT_BEGIN(KERN_ERR, 3645 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3646 EXPECT_BEGIN(KERN_ERR, 3647 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 3648 EXPECT_BEGIN(KERN_ERR, 3649 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up"); 3650 EXPECT_BEGIN(KERN_ERR, 3651 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up"); 3652 EXPECT_BEGIN(KERN_ERR, 3653 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 3654 EXPECT_BEGIN(KERN_ERR, 3655 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3656 EXPECT_BEGIN(KERN_ERR, 3657 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3658 EXPECT_BEGIN(KERN_ERR, 3659 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3660 EXPECT_BEGIN(KERN_ERR, 3661 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3662 EXPECT_BEGIN(KERN_ERR, 3663 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3664 EXPECT_BEGIN(KERN_ERR, 3665 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3666 3667 ret = overlay_data_apply("overlay", NULL); 3668 3669 EXPECT_END(KERN_ERR, 3670 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right"); 3671 EXPECT_END(KERN_ERR, 3672 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left"); 3673 EXPECT_END(KERN_ERR, 3674 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200"); 3675 EXPECT_END(KERN_ERR, 3676 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2"); 3677 EXPECT_END(KERN_ERR, 3678 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate"); 3679 EXPECT_END(KERN_ERR, 3680 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color"); 3681 EXPECT_END(KERN_ERR, 3682 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status"); 3683 EXPECT_END(KERN_ERR, 3684 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up"); 3685 EXPECT_END(KERN_ERR, 3686 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up"); 3687 EXPECT_END(KERN_ERR, 3688 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status"); 3689 EXPECT_END(KERN_ERR, 3690 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status"); 3691 3692 unittest(ret, "Adding overlay 'overlay' failed\n"); 3693 3694 EXPECT_BEGIN(KERN_ERR, 3695 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3696 EXPECT_BEGIN(KERN_ERR, 3697 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3698 3699 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), 3700 "Adding overlay 'overlay_bad_add_dup_node' failed\n"); 3701 3702 EXPECT_END(KERN_ERR, 3703 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name"); 3704 EXPECT_END(KERN_ERR, 3705 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller"); 3706 3707 EXPECT_BEGIN(KERN_ERR, 3708 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 3709 EXPECT_BEGIN(KERN_ERR, 3710 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail"); 3711 EXPECT_BEGIN(KERN_ERR, 3712 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name"); 3713 3714 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL), 3715 "Adding overlay 'overlay_bad_add_dup_prop' failed\n"); 3716 3717 EXPECT_END(KERN_ERR, 3718 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name"); 3719 EXPECT_END(KERN_ERR, 3720 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail"); 3721 EXPECT_END(KERN_ERR, 3722 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric"); 3723 3724 unittest(overlay_data_apply("overlay_bad_phandle", NULL), 3725 "Adding overlay 'overlay_bad_phandle' failed\n"); 3726 3727 unittest(overlay_data_apply("overlay_bad_symbol", NULL), 3728 "Adding overlay 'overlay_bad_symbol' failed\n"); 3729 3730 return; 3731 3732 err_unlock: 3733 mutex_unlock(&of_mutex); 3734 } 3735 3736 #else 3737 3738 static inline __init void of_unittest_overlay_high_level(void) {} 3739 3740 #endif 3741 3742 static int __init of_unittest(void) 3743 { 3744 struct device_node *np; 3745 int res; 3746 3747 pr_info("start of unittest - you will see error messages\n"); 3748 3749 /* Taint the kernel so we know we've run tests. */ 3750 add_taint(TAINT_TEST, LOCKDEP_STILL_OK); 3751 3752 /* adding data for unittest */ 3753 3754 if (IS_ENABLED(CONFIG_UML)) 3755 unittest_unflatten_overlay_base(); 3756 3757 res = unittest_data_add(); 3758 if (res) 3759 return res; 3760 if (!of_aliases) 3761 of_aliases = of_find_node_by_path("/aliases"); 3762 3763 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 3764 if (!np) { 3765 pr_info("No testcase data in device tree; not running tests\n"); 3766 return 0; 3767 } 3768 of_node_put(np); 3769 3770 of_unittest_check_tree_linkage(); 3771 of_unittest_check_phandles(); 3772 of_unittest_find_node_by_name(); 3773 of_unittest_dynamic(); 3774 of_unittest_parse_phandle_with_args(); 3775 of_unittest_parse_phandle_with_args_map(); 3776 of_unittest_printf(); 3777 of_unittest_property_string(); 3778 of_unittest_property_copy(); 3779 of_unittest_changeset(); 3780 of_unittest_parse_interrupts(); 3781 of_unittest_parse_interrupts_extended(); 3782 of_unittest_dma_get_max_cpu_address(); 3783 of_unittest_parse_dma_ranges(); 3784 of_unittest_pci_dma_ranges(); 3785 of_unittest_bus_ranges(); 3786 of_unittest_bus_3cell_ranges(); 3787 of_unittest_reg(); 3788 of_unittest_match_node(); 3789 of_unittest_platform_populate(); 3790 of_unittest_overlay(); 3791 of_unittest_lifecycle(); 3792 3793 /* Double check linkage after removing testcase data */ 3794 of_unittest_check_tree_linkage(); 3795 3796 of_unittest_overlay_high_level(); 3797 3798 pr_info("end of unittest - %i passed, %i failed\n", 3799 unittest_results.passed, unittest_results.failed); 3800 3801 return 0; 3802 } 3803 late_initcall(of_unittest); 3804