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