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/pci.h>
26 #include <linux/kernel.h>
27
28 #include <linux/i2c.h>
29 #include <linux/i2c-mux.h>
30 #include <linux/gpio/driver.h>
31
32 #include <linux/bitops.h>
33
34 #include "of_private.h"
35
36 static struct unittest_results {
37 int passed;
38 int failed;
39 } unittest_results;
40
41 #define unittest(result, fmt, ...) ({ \
42 bool failed = !(result); \
43 if (failed) { \
44 unittest_results.failed++; \
45 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
46 } else { \
47 unittest_results.passed++; \
48 pr_info("pass %s():%i\n", __func__, __LINE__); \
49 } \
50 failed; \
51 })
52
53 #ifdef CONFIG_OF_KOBJ
54 #define OF_KREF_READ(NODE) kref_read(&(NODE)->kobj.kref)
55 #else
56 #define OF_KREF_READ(NODE) 1
57 #endif
58
59 /*
60 * Expected message may have a message level other than KERN_INFO.
61 * Print the expected message only if the current loglevel will allow
62 * the actual message to print.
63 *
64 * Do not use EXPECT_BEGIN(), EXPECT_END(), EXPECT_NOT_BEGIN(), or
65 * EXPECT_NOT_END() to report messages expected to be reported or not
66 * reported by pr_debug().
67 */
68 #define EXPECT_BEGIN(level, fmt, ...) \
69 printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__)
70
71 #define EXPECT_END(level, fmt, ...) \
72 printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__)
73
74 #define EXPECT_NOT_BEGIN(level, fmt, ...) \
75 printk(level pr_fmt("EXPECT_NOT \\ : ") fmt, ##__VA_ARGS__)
76
77 #define EXPECT_NOT_END(level, fmt, ...) \
78 printk(level pr_fmt("EXPECT_NOT / : ") fmt, ##__VA_ARGS__)
79
of_unittest_find_node_by_name(void)80 static void __init of_unittest_find_node_by_name(void)
81 {
82 struct device_node *np;
83 const char *options, *name;
84
85 np = of_find_node_by_path("/testcase-data");
86 name = kasprintf(GFP_KERNEL, "%pOF", np);
87 unittest(np && name && !strcmp("/testcase-data", name),
88 "find /testcase-data failed\n");
89 of_node_put(np);
90 kfree(name);
91
92 /* Test if trailing '/' works */
93 np = of_find_node_by_path("/testcase-data/");
94 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
95
96 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
97 name = kasprintf(GFP_KERNEL, "%pOF", np);
98 unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
99 "find /testcase-data/phandle-tests/consumer-a failed\n");
100 of_node_put(np);
101 kfree(name);
102
103 np = of_find_node_by_path("testcase-alias");
104 name = kasprintf(GFP_KERNEL, "%pOF", np);
105 unittest(np && name && !strcmp("/testcase-data", name),
106 "find testcase-alias failed\n");
107 of_node_put(np);
108 kfree(name);
109
110 /* Test if trailing '/' works on aliases */
111 np = of_find_node_by_path("testcase-alias/");
112 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
113
114 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
115 name = kasprintf(GFP_KERNEL, "%pOF", np);
116 unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
117 "find testcase-alias/phandle-tests/consumer-a failed\n");
118 of_node_put(np);
119 kfree(name);
120
121 np = of_find_node_by_path("/testcase-data/missing-path");
122 unittest(!np, "non-existent path returned node %pOF\n", np);
123 of_node_put(np);
124
125 np = of_find_node_by_path("missing-alias");
126 unittest(!np, "non-existent alias returned node %pOF\n", np);
127 of_node_put(np);
128
129 np = of_find_node_by_path("testcase-alias/missing-path");
130 unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
131 of_node_put(np);
132
133 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
134 unittest(np && !strcmp("testoption", options),
135 "option path test failed\n");
136 of_node_put(np);
137
138 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
139 unittest(np && !strcmp("test/option", options),
140 "option path test, subcase #1 failed\n");
141 of_node_put(np);
142
143 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
144 unittest(np && !strcmp("test/option", options),
145 "option path test, subcase #2 failed\n");
146 of_node_put(np);
147
148 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
149 unittest(np, "NULL option path test failed\n");
150 of_node_put(np);
151
152 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
153 &options);
154 unittest(np && !strcmp("testaliasoption", options),
155 "option alias path test failed\n");
156 of_node_put(np);
157
158 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
159 &options);
160 unittest(np && !strcmp("test/alias/option", options),
161 "option alias path test, subcase #1 failed\n");
162 of_node_put(np);
163
164 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
165 unittest(np, "NULL option alias path test failed\n");
166 of_node_put(np);
167
168 options = "testoption";
169 np = of_find_node_opts_by_path("testcase-alias", &options);
170 unittest(np && !options, "option clearing test failed\n");
171 of_node_put(np);
172
173 options = "testoption";
174 np = of_find_node_opts_by_path("/", &options);
175 unittest(np && !options, "option clearing root node test failed\n");
176 of_node_put(np);
177 }
178
of_unittest_dynamic(void)179 static void __init of_unittest_dynamic(void)
180 {
181 struct device_node *np;
182 struct property *prop;
183
184 np = of_find_node_by_path("/testcase-data");
185 if (!np) {
186 pr_err("missing testcase data\n");
187 return;
188 }
189
190 /* Array of 4 properties for the purpose of testing */
191 prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
192 if (!prop) {
193 unittest(0, "kzalloc() failed\n");
194 return;
195 }
196
197 /* Add a new property - should pass*/
198 prop->name = "new-property";
199 prop->value = "new-property-data";
200 prop->length = strlen(prop->value) + 1;
201 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
202
203 /* Try to add an existing property - should fail */
204 prop++;
205 prop->name = "new-property";
206 prop->value = "new-property-data-should-fail";
207 prop->length = strlen(prop->value) + 1;
208 unittest(of_add_property(np, prop) != 0,
209 "Adding an existing property should have failed\n");
210
211 /* Try to modify an existing property - should pass */
212 prop->value = "modify-property-data-should-pass";
213 prop->length = strlen(prop->value) + 1;
214 unittest(of_update_property(np, prop) == 0,
215 "Updating an existing property should have passed\n");
216
217 /* Try to modify non-existent property - should pass*/
218 prop++;
219 prop->name = "modify-property";
220 prop->value = "modify-missing-property-data-should-pass";
221 prop->length = strlen(prop->value) + 1;
222 unittest(of_update_property(np, prop) == 0,
223 "Updating a missing property should have passed\n");
224
225 /* Remove property - should pass */
226 unittest(of_remove_property(np, prop) == 0,
227 "Removing a property should have passed\n");
228
229 /* Adding very large property - should pass */
230 prop++;
231 prop->name = "large-property-PAGE_SIZEx8";
232 prop->length = PAGE_SIZE * 8;
233 prop->value = kzalloc(prop->length, GFP_KERNEL);
234 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
235 if (prop->value)
236 unittest(of_add_property(np, prop) == 0,
237 "Adding a large property should have passed\n");
238 }
239
of_unittest_check_node_linkage(struct device_node * np)240 static int __init of_unittest_check_node_linkage(struct device_node *np)
241 {
242 int count = 0, rc;
243
244 for_each_child_of_node_scoped(np, child) {
245 if (child->parent != np) {
246 pr_err("Child node %pOFn links to wrong parent %pOFn\n",
247 child, np);
248 return -EINVAL;
249 }
250
251 rc = of_unittest_check_node_linkage(child);
252 if (rc < 0)
253 return rc;
254 count += rc;
255 }
256
257 return count + 1;
258 }
259
of_unittest_check_tree_linkage(void)260 static void __init of_unittest_check_tree_linkage(void)
261 {
262 struct device_node *np;
263 int allnode_count = 0, child_count;
264
265 if (!of_root)
266 return;
267
268 for_each_of_allnodes(np)
269 allnode_count++;
270 child_count = of_unittest_check_node_linkage(of_root);
271
272 unittest(child_count > 0, "Device node data structure is corrupted\n");
273 unittest(child_count == allnode_count,
274 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
275 allnode_count, child_count);
276 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
277 }
278
of_unittest_printf_one(struct device_node * np,const char * fmt,const char * expected)279 static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
280 const char *expected)
281 {
282 unsigned char *buf;
283 int buf_size;
284 int size, i;
285
286 buf_size = strlen(expected) + 10;
287 buf = kmalloc(buf_size, GFP_KERNEL);
288 if (!buf)
289 return;
290
291 /* Baseline; check conversion with a large size limit */
292 memset(buf, 0xff, buf_size);
293 size = snprintf(buf, buf_size - 2, fmt, np);
294
295 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
296 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
297 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
298 fmt, expected, buf);
299
300 /* Make sure length limits work */
301 size++;
302 for (i = 0; i < 2; i++, size--) {
303 /* Clear the buffer, and make sure it works correctly still */
304 memset(buf, 0xff, buf_size);
305 snprintf(buf, size+1, fmt, np);
306 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
307 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
308 size, fmt, expected, buf);
309 }
310 kfree(buf);
311 }
312
of_unittest_printf(void)313 static void __init of_unittest_printf(void)
314 {
315 struct device_node *np;
316 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
317 char phandle_str[16] = "";
318
319 np = of_find_node_by_path(full_name);
320 if (!np) {
321 unittest(np, "testcase data missing\n");
322 return;
323 }
324
325 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
326
327 of_unittest_printf_one(np, "%pOF", full_name);
328 of_unittest_printf_one(np, "%pOFf", full_name);
329 of_unittest_printf_one(np, "%pOFn", "dev");
330 of_unittest_printf_one(np, "%2pOFn", "dev");
331 of_unittest_printf_one(np, "%5pOFn", " dev");
332 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
333 of_unittest_printf_one(np, "%pOFp", phandle_str);
334 of_unittest_printf_one(np, "%pOFP", "dev@100");
335 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
336 of_unittest_printf_one(np, "%10pOFP", " dev@100");
337 of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
338 of_unittest_printf_one(of_root, "%pOFP", "/");
339 of_unittest_printf_one(np, "%pOFF", "----");
340 of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
341 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
342 of_unittest_printf_one(np, "%pOFc", "test-sub-device");
343 of_unittest_printf_one(np, "%pOFC",
344 "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
345 }
346
347 struct node_hash {
348 struct hlist_node node;
349 struct device_node *np;
350 };
351
352 static DEFINE_HASHTABLE(phandle_ht, 8);
of_unittest_check_phandles(void)353 static void __init of_unittest_check_phandles(void)
354 {
355 struct device_node *np;
356 struct node_hash *nh;
357 struct hlist_node *tmp;
358 int i, dup_count = 0, phandle_count = 0;
359
360 for_each_of_allnodes(np) {
361 if (!np->phandle)
362 continue;
363
364 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
365 if (nh->np->phandle == np->phandle) {
366 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
367 np->phandle, nh->np, np);
368 dup_count++;
369 break;
370 }
371 }
372
373 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
374 if (!nh)
375 return;
376
377 nh->np = np;
378 hash_add(phandle_ht, &nh->node, np->phandle);
379 phandle_count++;
380 }
381 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
382 dup_count, phandle_count);
383
384 /* Clean up */
385 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
386 hash_del(&nh->node);
387 kfree(nh);
388 }
389 }
390
of_unittest_parse_phandle_with_args(void)391 static void __init of_unittest_parse_phandle_with_args(void)
392 {
393 struct device_node *np;
394 struct of_phandle_args args;
395 int i, rc;
396
397 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
398 if (!np) {
399 pr_err("missing testcase data\n");
400 return;
401 }
402
403 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
404 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
405
406 for (i = 0; i < 8; i++) {
407 bool passed = true;
408
409 memset(&args, 0, sizeof(args));
410 rc = of_parse_phandle_with_args(np, "phandle-list",
411 "#phandle-cells", i, &args);
412
413 /* Test the values from tests-phandle.dtsi */
414 switch (i) {
415 case 0:
416 passed &= !rc;
417 passed &= (args.args_count == 1);
418 passed &= (args.args[0] == (i + 1));
419 break;
420 case 1:
421 passed &= !rc;
422 passed &= (args.args_count == 2);
423 passed &= (args.args[0] == (i + 1));
424 passed &= (args.args[1] == 0);
425 break;
426 case 2:
427 passed &= (rc == -ENOENT);
428 break;
429 case 3:
430 passed &= !rc;
431 passed &= (args.args_count == 3);
432 passed &= (args.args[0] == (i + 1));
433 passed &= (args.args[1] == 4);
434 passed &= (args.args[2] == 3);
435 break;
436 case 4:
437 passed &= !rc;
438 passed &= (args.args_count == 2);
439 passed &= (args.args[0] == (i + 1));
440 passed &= (args.args[1] == 100);
441 break;
442 case 5:
443 passed &= !rc;
444 passed &= (args.args_count == 0);
445 break;
446 case 6:
447 passed &= !rc;
448 passed &= (args.args_count == 1);
449 passed &= (args.args[0] == (i + 1));
450 break;
451 case 7:
452 passed &= (rc == -ENOENT);
453 break;
454 default:
455 passed = false;
456 }
457
458 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
459 i, args.np, rc);
460
461 if (rc == 0)
462 of_node_put(args.np);
463 }
464
465 /* Check for missing list property */
466 memset(&args, 0, sizeof(args));
467 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
468 "#phandle-cells", 0, &args);
469 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
470 rc = of_count_phandle_with_args(np, "phandle-list-missing",
471 "#phandle-cells");
472 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
473
474 /* Check for missing cells property */
475 memset(&args, 0, sizeof(args));
476
477 EXPECT_BEGIN(KERN_INFO,
478 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
479
480 rc = of_parse_phandle_with_args(np, "phandle-list",
481 "#phandle-cells-missing", 0, &args);
482
483 EXPECT_END(KERN_INFO,
484 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
485
486 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
487
488 EXPECT_BEGIN(KERN_INFO,
489 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
490
491 rc = of_count_phandle_with_args(np, "phandle-list",
492 "#phandle-cells-missing");
493
494 EXPECT_END(KERN_INFO,
495 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
496
497 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
498
499 /* Check for bad phandle in list */
500 memset(&args, 0, sizeof(args));
501
502 EXPECT_BEGIN(KERN_INFO,
503 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
504
505 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
506 "#phandle-cells", 0, &args);
507
508 EXPECT_END(KERN_INFO,
509 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
510
511 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
512
513 EXPECT_BEGIN(KERN_INFO,
514 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
515
516 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
517 "#phandle-cells");
518
519 EXPECT_END(KERN_INFO,
520 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
521
522 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
523
524 /* Check for incorrectly formed argument list */
525 memset(&args, 0, sizeof(args));
526
527 EXPECT_BEGIN(KERN_INFO,
528 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
529
530 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
531 "#phandle-cells", 1, &args);
532
533 EXPECT_END(KERN_INFO,
534 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
535
536 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
537
538 EXPECT_BEGIN(KERN_INFO,
539 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
540
541 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
542 "#phandle-cells");
543
544 EXPECT_END(KERN_INFO,
545 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
546
547 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
548 }
549
of_unittest_parse_phandle_with_args_map(void)550 static void __init of_unittest_parse_phandle_with_args_map(void)
551 {
552 struct device_node *np, *p[6] = {};
553 struct of_phandle_args args;
554 unsigned int prefs[6];
555 int i, rc;
556
557 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
558 if (!np) {
559 pr_err("missing testcase data\n");
560 return;
561 }
562
563 p[0] = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
564 p[1] = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
565 p[2] = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
566 p[3] = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
567 p[4] = of_find_node_by_path("/testcase-data/phandle-tests/provider4");
568 p[5] = of_find_node_by_path("/testcase-data/phandle-tests/provider5");
569 for (i = 0; i < ARRAY_SIZE(p); ++i) {
570 if (!p[i]) {
571 pr_err("missing testcase data\n");
572 return;
573 }
574 prefs[i] = OF_KREF_READ(p[i]);
575 }
576
577 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
578 unittest(rc == 8, "of_count_phandle_with_args() returned %i, expected 8\n", rc);
579
580 for (i = 0; i < 9; i++) {
581 bool passed = true;
582
583 memset(&args, 0, sizeof(args));
584 rc = of_parse_phandle_with_args_map(np, "phandle-list",
585 "phandle", i, &args);
586
587 /* Test the values from tests-phandle.dtsi */
588 switch (i) {
589 case 0:
590 passed &= !rc;
591 passed &= (args.np == p[1]);
592 passed &= (args.args_count == 1);
593 passed &= (args.args[0] == 1);
594 break;
595 case 1:
596 passed &= !rc;
597 passed &= (args.np == p[3]);
598 passed &= (args.args_count == 3);
599 passed &= (args.args[0] == 2);
600 passed &= (args.args[1] == 5);
601 passed &= (args.args[2] == 3);
602 break;
603 case 2:
604 passed &= (rc == -ENOENT);
605 break;
606 case 3:
607 passed &= !rc;
608 passed &= (args.np == p[0]);
609 passed &= (args.args_count == 0);
610 break;
611 case 4:
612 passed &= !rc;
613 passed &= (args.np == p[1]);
614 passed &= (args.args_count == 1);
615 passed &= (args.args[0] == 3);
616 break;
617 case 5:
618 passed &= !rc;
619 passed &= (args.np == p[0]);
620 passed &= (args.args_count == 0);
621 break;
622 case 6:
623 passed &= !rc;
624 passed &= (args.np == p[2]);
625 passed &= (args.args_count == 2);
626 passed &= (args.args[0] == 15);
627 passed &= (args.args[1] == 0x20);
628 break;
629 case 7:
630 passed &= !rc;
631 passed &= (args.np == p[3]);
632 passed &= (args.args_count == 3);
633 passed &= (args.args[0] == 2);
634 passed &= (args.args[1] == 5);
635 passed &= (args.args[2] == 3);
636 break;
637 case 8:
638 passed &= (rc == -ENOENT);
639 break;
640 default:
641 passed = false;
642 }
643
644 unittest(passed, "index %i - data error on node %s rc=%i\n",
645 i, args.np->full_name, rc);
646
647 if (rc == 0)
648 of_node_put(args.np);
649 }
650
651 /* Check for missing list property */
652 memset(&args, 0, sizeof(args));
653 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
654 "phandle", 0, &args);
655 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
656
657 /* Check for missing cells,map,mask property */
658 memset(&args, 0, sizeof(args));
659
660 EXPECT_BEGIN(KERN_INFO,
661 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
662
663 rc = of_parse_phandle_with_args_map(np, "phandle-list",
664 "phandle-missing", 0, &args);
665 EXPECT_END(KERN_INFO,
666 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
667
668 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
669
670 /* Check for bad phandle in list */
671 memset(&args, 0, sizeof(args));
672
673 EXPECT_BEGIN(KERN_INFO,
674 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
675
676 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
677 "phandle", 0, &args);
678 EXPECT_END(KERN_INFO,
679 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
680
681 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
682
683 /* Check for incorrectly formed argument list */
684 memset(&args, 0, sizeof(args));
685
686 EXPECT_BEGIN(KERN_INFO,
687 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
688
689 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
690 "phandle", 1, &args);
691 EXPECT_END(KERN_INFO,
692 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
693
694 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
695
696 for (i = 0; i < ARRAY_SIZE(p); ++i) {
697 unittest(prefs[i] == OF_KREF_READ(p[i]),
698 "provider%d: expected:%d got:%d\n",
699 i, prefs[i], OF_KREF_READ(p[i]));
700 of_node_put(p[i]);
701 }
702 }
703
of_unittest_property_string(void)704 static void __init of_unittest_property_string(void)
705 {
706 const char *strings[4];
707 struct device_node *np;
708 int rc;
709
710 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
711 if (!np) {
712 pr_err("No testcase data in device tree\n");
713 return;
714 }
715
716 rc = of_property_match_string(np, "phandle-list-names", "first");
717 unittest(rc == 0, "first expected:0 got:%i\n", rc);
718 rc = of_property_match_string(np, "phandle-list-names", "second");
719 unittest(rc == 1, "second expected:1 got:%i\n", rc);
720 rc = of_property_match_string(np, "phandle-list-names", "third");
721 unittest(rc == 2, "third expected:2 got:%i\n", rc);
722 rc = of_property_match_string(np, "phandle-list-names", "fourth");
723 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
724 rc = of_property_match_string(np, "missing-property", "blah");
725 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
726 rc = of_property_match_string(np, "empty-property", "blah");
727 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
728 rc = of_property_match_string(np, "unterminated-string", "blah");
729 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
730
731 /* of_property_count_strings() tests */
732 rc = of_property_count_strings(np, "string-property");
733 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
734 rc = of_property_count_strings(np, "phandle-list-names");
735 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
736 rc = of_property_count_strings(np, "unterminated-string");
737 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
738 rc = of_property_count_strings(np, "unterminated-string-list");
739 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
740
741 /* of_property_read_string_index() tests */
742 rc = of_property_read_string_index(np, "string-property", 0, strings);
743 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
744 strings[0] = NULL;
745 rc = of_property_read_string_index(np, "string-property", 1, strings);
746 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
747 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
748 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
749 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
750 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
751 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
752 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
753 strings[0] = NULL;
754 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
755 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
756 strings[0] = NULL;
757 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
758 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
759 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
760 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
761 strings[0] = NULL;
762 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
763 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
764 strings[1] = NULL;
765
766 /* of_property_read_string_array() tests */
767 rc = of_property_read_string_array(np, "string-property", strings, 4);
768 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
769 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
770 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
771 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
772 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
773 /* -- An incorrectly formed string should cause a failure */
774 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
775 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
776 /* -- parsing the correctly formed strings should still work: */
777 strings[2] = NULL;
778 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
779 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
780 strings[1] = NULL;
781 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
782 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
783 }
784
785 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
786 (p1)->value && (p2)->value && \
787 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
788 !strcmp((p1)->name, (p2)->name))
of_unittest_property_copy(void)789 static void __init of_unittest_property_copy(void)
790 {
791 #ifdef CONFIG_OF_DYNAMIC
792 struct property p1 = { .name = "p1", .length = 0, .value = "" };
793 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
794 struct property *new;
795
796 new = __of_prop_dup(&p1, GFP_KERNEL);
797 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
798 __of_prop_free(new);
799
800 new = __of_prop_dup(&p2, GFP_KERNEL);
801 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
802 __of_prop_free(new);
803 #endif
804 }
805
of_unittest_changeset(void)806 static void __init of_unittest_changeset(void)
807 {
808 #ifdef CONFIG_OF_DYNAMIC
809 int ret;
810 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
811 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
812 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
813 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
814 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
815 struct property *ppremove;
816 struct device_node *n1, *n2, *n21, *n22, *nchangeset, *nremove, *parent, *np;
817 static const char * const str_array[] = { "str1", "str2", "str3" };
818 const u32 u32_array[] = { 1, 2, 3 };
819 struct of_changeset chgset;
820 const char *propstr = NULL;
821
822 n1 = __of_node_dup(NULL, "n1");
823 unittest(n1, "testcase setup failure\n");
824
825 n2 = __of_node_dup(NULL, "n2");
826 unittest(n2, "testcase setup failure\n");
827
828 n21 = __of_node_dup(NULL, "n21");
829 unittest(n21, "testcase setup failure %p\n", n21);
830
831 nchangeset = of_find_node_by_path("/testcase-data/changeset");
832 nremove = of_get_child_by_name(nchangeset, "node-remove");
833 unittest(nremove, "testcase setup failure\n");
834
835 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
836 unittest(ppadd, "testcase setup failure\n");
837
838 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
839 unittest(ppname_n1, "testcase setup failure\n");
840
841 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
842 unittest(ppname_n2, "testcase setup failure\n");
843
844 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
845 unittest(ppname_n21, "testcase setup failure\n");
846
847 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
848 unittest(ppupdate, "testcase setup failure\n");
849
850 parent = nchangeset;
851 n1->parent = parent;
852 n2->parent = parent;
853 n21->parent = n2;
854
855 ppremove = of_find_property(parent, "prop-remove", NULL);
856 unittest(ppremove, "failed to find removal prop");
857
858 of_changeset_init(&chgset);
859
860 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
861 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
862
863 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
864 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
865
866 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
867 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
868
869 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
870
871 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
872 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
873 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
874 n22 = of_changeset_create_node(&chgset, n2, "n22");
875 unittest(n22, "fail create n22\n");
876 unittest(!of_changeset_add_prop_string(&chgset, n22, "prop-str", "abcd"),
877 "fail add prop prop-str");
878 unittest(!of_changeset_add_prop_string_array(&chgset, n22, "prop-str-array",
879 (const char **)str_array,
880 ARRAY_SIZE(str_array)),
881 "fail add prop prop-str-array");
882 unittest(!of_changeset_add_prop_u32_array(&chgset, n22, "prop-u32-array",
883 u32_array, ARRAY_SIZE(u32_array)),
884 "fail add prop prop-u32-array");
885
886 unittest(!of_changeset_apply(&chgset), "apply failed\n");
887
888 of_node_put(nchangeset);
889
890 /* Make sure node names are constructed correctly */
891 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
892 "'%pOF' not added\n", n21);
893 of_node_put(np);
894 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n22")),
895 "'%pOF' not added\n", n22);
896 of_node_put(np);
897
898 unittest(!of_changeset_revert(&chgset), "revert failed\n");
899
900 unittest(!of_find_node_by_path("/testcase-data/changeset/n2/n21"),
901 "'%pOF' still present after revert\n", n21);
902
903 unittest(of_property_present(parent, "prop-remove"),
904 "failed to find removed prop after revert\n");
905
906 ret = of_property_read_string(parent, "prop-update", &propstr);
907 unittest(!ret, "failed to find updated prop after revert\n");
908 if (!ret)
909 unittest(strcmp(propstr, "hello") == 0, "original value not in updated property after revert");
910
911 of_changeset_destroy(&chgset);
912
913 of_node_put(n1);
914 of_node_put(n2);
915 of_node_put(n21);
916 of_node_put(n22);
917 #endif
918 }
919
changeset_check_string(struct device_node * np,const char * prop_name,const char * expected_str)920 static void __init __maybe_unused changeset_check_string(struct device_node *np,
921 const char *prop_name,
922 const char *expected_str)
923 {
924 const char *str;
925 int ret;
926
927 ret = of_property_read_string(np, prop_name, &str);
928 if (unittest(ret == 0, "failed to read %s\n", prop_name))
929 return;
930
931 unittest(strcmp(str, expected_str) == 0,
932 "%s value mismatch (read '%s', exp '%s')\n",
933 prop_name, str, expected_str);
934 }
935
changeset_check_string_array(struct device_node * np,const char * prop_name,const char * const * expected_array,unsigned int count)936 static void __init __maybe_unused changeset_check_string_array(struct device_node *np,
937 const char *prop_name,
938 const char * const *expected_array,
939 unsigned int count)
940 {
941 const char *str;
942 unsigned int i;
943 int ret;
944 int cnt;
945
946 cnt = of_property_count_strings(np, prop_name);
947 if (unittest(cnt >= 0, "failed to get %s count\n", prop_name))
948 return;
949
950 if (unittest(cnt == count,
951 "%s count mismatch (read %d, exp %u)\n",
952 prop_name, cnt, count))
953 return;
954
955 for (i = 0; i < count; i++) {
956 ret = of_property_read_string_index(np, prop_name, i, &str);
957 if (unittest(ret == 0, "failed to read %s[%d]\n", prop_name, i))
958 continue;
959
960 unittest(strcmp(str, expected_array[i]) == 0,
961 "%s[%d] value mismatch (read '%s', exp '%s')\n",
962 prop_name, i, str, expected_array[i]);
963 }
964 }
965
changeset_check_u32(struct device_node * np,const char * prop_name,u32 expected_u32)966 static void __init __maybe_unused changeset_check_u32(struct device_node *np,
967 const char *prop_name,
968 u32 expected_u32)
969 {
970 u32 val32;
971 int ret;
972
973 ret = of_property_read_u32(np, prop_name, &val32);
974 if (unittest(ret == 0, "failed to read %s\n", prop_name))
975 return;
976
977 unittest(val32 == expected_u32,
978 "%s value mismatch (read '%u', exp '%u')\n",
979 prop_name, val32, expected_u32);
980 }
981
changeset_check_u32_array(struct device_node * np,const char * prop_name,const u32 * expected_array,unsigned int count)982 static void __init __maybe_unused changeset_check_u32_array(struct device_node *np,
983 const char *prop_name,
984 const u32 *expected_array,
985 unsigned int count)
986 {
987 unsigned int i;
988 u32 val32;
989 int ret;
990 int cnt;
991
992 cnt = of_property_count_u32_elems(np, prop_name);
993 if (unittest(cnt >= 0, "failed to get %s count\n", prop_name))
994 return;
995
996 if (unittest(cnt == count,
997 "%s count mismatch (read %d, exp %u)\n",
998 prop_name, cnt, count))
999 return;
1000
1001 for (i = 0; i < count; i++) {
1002 ret = of_property_read_u32_index(np, prop_name, i, &val32);
1003 if (unittest(ret == 0, "failed to read %s[%d]\n", prop_name, i))
1004 continue;
1005
1006 unittest(val32 == expected_array[i],
1007 "%s[%d] value mismatch (read '%u', exp '%u')\n",
1008 prop_name, i, val32, expected_array[i]);
1009 }
1010 }
1011
changeset_check_bool(struct device_node * np,const char * prop_name)1012 static void __init __maybe_unused changeset_check_bool(struct device_node *np,
1013 const char *prop_name)
1014 {
1015 unittest(of_property_read_bool(np, prop_name),
1016 "%s value mismatch (read 'false', exp 'true')\n", prop_name);
1017 }
1018
of_unittest_changeset_prop(void)1019 static void __init of_unittest_changeset_prop(void)
1020 {
1021 #ifdef CONFIG_OF_DYNAMIC
1022 static const char * const str_array[] = { "abc", "defg", "hij" };
1023 static const u32 u32_array[] = { 123, 4567, 89, 10, 11 };
1024 struct device_node *nchangeset, *np;
1025 struct of_changeset chgset;
1026 int ret;
1027
1028 nchangeset = of_find_node_by_path("/testcase-data/changeset");
1029 if (!nchangeset) {
1030 pr_err("missing testcase data\n");
1031 return;
1032 }
1033
1034 of_changeset_init(&chgset);
1035
1036 np = of_changeset_create_node(&chgset, nchangeset, "test-prop");
1037 if (unittest(np, "failed to create test-prop node\n"))
1038 goto end_changeset_destroy;
1039
1040 ret = of_changeset_add_prop_string(&chgset, np, "prop-string", "abcde");
1041 unittest(ret == 0, "failed to add prop-string\n");
1042
1043 ret = of_changeset_add_prop_string_array(&chgset, np, "prop-string-array",
1044 str_array, ARRAY_SIZE(str_array));
1045 unittest(ret == 0, "failed to add prop-string-array\n");
1046
1047 ret = of_changeset_add_prop_u32(&chgset, np, "prop-u32", 1234);
1048 unittest(ret == 0, "failed to add prop-u32\n");
1049
1050 ret = of_changeset_add_prop_u32_array(&chgset, np, "prop-u32-array",
1051 u32_array, ARRAY_SIZE(u32_array));
1052 unittest(ret == 0, "failed to add prop-u32-array\n");
1053
1054 ret = of_changeset_add_prop_bool(&chgset, np, "prop-bool");
1055 unittest(ret == 0, "failed to add prop-bool\n");
1056
1057 of_node_put(np);
1058
1059 ret = of_changeset_apply(&chgset);
1060 if (unittest(ret == 0, "failed to apply changeset\n"))
1061 goto end_changeset_destroy;
1062
1063 np = of_find_node_by_path("/testcase-data/changeset/test-prop");
1064 if (unittest(np, "failed to find test-prop node\n"))
1065 goto end_revert_changeset;
1066
1067 changeset_check_string(np, "prop-string", "abcde");
1068 changeset_check_string_array(np, "prop-string-array", str_array, ARRAY_SIZE(str_array));
1069 changeset_check_u32(np, "prop-u32", 1234);
1070 changeset_check_u32_array(np, "prop-u32-array", u32_array, ARRAY_SIZE(u32_array));
1071 changeset_check_bool(np, "prop-bool");
1072
1073 of_node_put(np);
1074
1075 end_revert_changeset:
1076 ret = of_changeset_revert(&chgset);
1077 unittest(ret == 0, "failed to revert changeset\n");
1078
1079 end_changeset_destroy:
1080 of_changeset_destroy(&chgset);
1081 of_node_put(nchangeset);
1082 #endif
1083 }
1084
of_unittest_dma_get_max_cpu_address(void)1085 static void __init of_unittest_dma_get_max_cpu_address(void)
1086 {
1087 struct device_node *np;
1088 phys_addr_t cpu_addr;
1089
1090 if (!IS_ENABLED(CONFIG_OF_ADDRESS))
1091 return;
1092
1093 np = of_find_node_by_path("/testcase-data/address-tests");
1094 if (!np) {
1095 pr_err("missing testcase data\n");
1096 return;
1097 }
1098
1099 cpu_addr = of_dma_get_max_cpu_address(np);
1100 unittest(cpu_addr == 0x4fffffff,
1101 "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n",
1102 &cpu_addr, 0x4fffffff);
1103 }
1104
of_unittest_dma_ranges_one(const char * path,u64 expect_dma_addr,u64 expect_paddr)1105 static void __init of_unittest_dma_ranges_one(const char *path,
1106 u64 expect_dma_addr, u64 expect_paddr)
1107 {
1108 #ifdef CONFIG_HAS_DMA
1109 struct device_node *np;
1110 const struct bus_dma_region *map = NULL;
1111 int rc;
1112
1113 np = of_find_node_by_path(path);
1114 if (!np) {
1115 pr_err("missing testcase data\n");
1116 return;
1117 }
1118
1119 rc = of_dma_get_range(np, &map);
1120
1121 unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);
1122
1123 if (!rc) {
1124 phys_addr_t paddr;
1125 dma_addr_t dma_addr;
1126 struct device *dev_bogus;
1127
1128 dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
1129 if (!dev_bogus) {
1130 unittest(0, "kzalloc() failed\n");
1131 kfree(map);
1132 return;
1133 }
1134
1135 dev_bogus->dma_range_map = map;
1136 paddr = dma_to_phys(dev_bogus, expect_dma_addr);
1137 dma_addr = phys_to_dma(dev_bogus, expect_paddr);
1138
1139 unittest(paddr == expect_paddr,
1140 "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",
1141 &paddr, expect_paddr, np);
1142 unittest(dma_addr == expect_dma_addr,
1143 "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n",
1144 &dma_addr, expect_dma_addr, np);
1145
1146 kfree(map);
1147 kfree(dev_bogus);
1148 }
1149 of_node_put(np);
1150 #endif
1151 }
1152
of_unittest_parse_dma_ranges(void)1153 static void __init of_unittest_parse_dma_ranges(void)
1154 {
1155 of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000",
1156 0x0, 0x20000000);
1157 if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
1158 of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000",
1159 0x100000000, 0x20000000);
1160 of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000",
1161 0x80000000, 0x20000000);
1162 }
1163
of_unittest_pci_dma_ranges(void)1164 static void __init of_unittest_pci_dma_ranges(void)
1165 {
1166 struct device_node *np;
1167 struct of_pci_range range;
1168 struct of_pci_range_parser parser;
1169 int i = 0;
1170
1171 if (!IS_ENABLED(CONFIG_PCI))
1172 return;
1173
1174 np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000");
1175 if (!np) {
1176 pr_err("missing testcase data\n");
1177 return;
1178 }
1179
1180 if (of_pci_dma_range_parser_init(&parser, np)) {
1181 pr_err("missing dma-ranges property\n");
1182 return;
1183 }
1184
1185 /*
1186 * Get the dma-ranges from the device tree
1187 */
1188 for_each_of_pci_range(&parser, &range) {
1189 if (!i) {
1190 unittest(range.size == 0x10000000,
1191 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
1192 np, range.size);
1193 unittest(range.cpu_addr == 0x20000000,
1194 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
1195 range.cpu_addr, np);
1196 unittest(range.pci_addr == 0x80000000,
1197 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
1198 range.pci_addr, np);
1199 } else {
1200 unittest(range.size == 0x10000000,
1201 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
1202 np, range.size);
1203 unittest(range.cpu_addr == 0x40000000,
1204 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
1205 range.cpu_addr, np);
1206 unittest(range.pci_addr == 0xc0000000,
1207 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
1208 range.pci_addr, np);
1209 }
1210 i++;
1211 }
1212
1213 of_node_put(np);
1214 }
1215
of_unittest_bus_ranges(void)1216 static void __init of_unittest_bus_ranges(void)
1217 {
1218 struct device_node *np;
1219 struct of_range range;
1220 struct of_range_parser parser;
1221 struct resource res;
1222 int ret, count, i = 0;
1223
1224 np = of_find_node_by_path("/testcase-data/address-tests");
1225 if (!np) {
1226 pr_err("missing testcase data\n");
1227 return;
1228 }
1229
1230 if (of_range_parser_init(&parser, np)) {
1231 pr_err("missing ranges property\n");
1232 return;
1233 }
1234
1235 ret = of_range_to_resource(np, 1, &res);
1236 unittest(!ret, "of_range_to_resource returned error (%d) node %pOF\n",
1237 ret, np);
1238 unittest(resource_type(&res) == IORESOURCE_MEM,
1239 "of_range_to_resource wrong resource type on node %pOF res=%pR\n",
1240 np, &res);
1241 unittest(res.start == 0xd0000000,
1242 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
1243 np, &res);
1244 unittest(resource_size(&res) == 0x20000000,
1245 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
1246 np, &res);
1247
1248 count = of_range_count(&parser);
1249 unittest(count == 2,
1250 "of_range_count wrong size on node %pOF count=%d\n",
1251 np, count);
1252
1253 /*
1254 * Get the "ranges" from the device tree
1255 */
1256 for_each_of_range(&parser, &range) {
1257 unittest(range.flags == IORESOURCE_MEM,
1258 "for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n",
1259 np, range.flags, IORESOURCE_MEM);
1260 if (!i) {
1261 unittest(range.size == 0x50000000,
1262 "for_each_of_range wrong size on node %pOF size=%llx\n",
1263 np, range.size);
1264 unittest(range.cpu_addr == 0x70000000,
1265 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1266 range.cpu_addr, np);
1267 unittest(range.bus_addr == 0x70000000,
1268 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1269 range.pci_addr, np);
1270 } else {
1271 unittest(range.size == 0x20000000,
1272 "for_each_of_range wrong size on node %pOF size=%llx\n",
1273 np, range.size);
1274 unittest(range.cpu_addr == 0xd0000000,
1275 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1276 range.cpu_addr, np);
1277 unittest(range.bus_addr == 0x00000000,
1278 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1279 range.pci_addr, np);
1280 }
1281 i++;
1282 }
1283
1284 of_node_put(np);
1285 }
1286
of_unittest_bus_3cell_ranges(void)1287 static void __init of_unittest_bus_3cell_ranges(void)
1288 {
1289 struct device_node *np;
1290 struct of_range range;
1291 struct of_range_parser parser;
1292 int i = 0;
1293
1294 np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000");
1295 if (!np) {
1296 pr_err("missing testcase data\n");
1297 return;
1298 }
1299
1300 if (of_range_parser_init(&parser, np)) {
1301 pr_err("missing ranges property\n");
1302 return;
1303 }
1304
1305 /*
1306 * Get the "ranges" from the device tree
1307 */
1308 for_each_of_range(&parser, &range) {
1309 if (!i) {
1310 unittest(range.flags == 0xf00baa,
1311 "for_each_of_range wrong flags on node %pOF flags=%x\n",
1312 np, range.flags);
1313 unittest(range.size == 0x100000,
1314 "for_each_of_range wrong size on node %pOF size=%llx\n",
1315 np, range.size);
1316 unittest(range.cpu_addr == 0xa0000000,
1317 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1318 range.cpu_addr, np);
1319 unittest(range.bus_addr == 0x0,
1320 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1321 range.pci_addr, np);
1322 } else {
1323 unittest(range.flags == 0xf00bee,
1324 "for_each_of_range wrong flags on node %pOF flags=%x\n",
1325 np, range.flags);
1326 unittest(range.size == 0x200000,
1327 "for_each_of_range wrong size on node %pOF size=%llx\n",
1328 np, range.size);
1329 unittest(range.cpu_addr == 0xb0000000,
1330 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1331 range.cpu_addr, np);
1332 unittest(range.bus_addr == 0x100000000,
1333 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1334 range.pci_addr, np);
1335 }
1336 i++;
1337 }
1338
1339 of_node_put(np);
1340 }
1341
of_unittest_reg(void)1342 static void __init of_unittest_reg(void)
1343 {
1344 struct device_node *np;
1345 struct resource res;
1346 int ret;
1347 u64 addr, size;
1348
1349 np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000");
1350 if (!np) {
1351 pr_err("missing testcase data\n");
1352 return;
1353 }
1354
1355 ret = of_property_read_reg(np, 0, &addr, &size);
1356 unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n",
1357 np, ret);
1358 unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n",
1359 np, addr);
1360
1361 of_node_put(np);
1362
1363 np = of_find_node_by_path("/testcase-data/platform-tests-2/node/test-device@100");
1364 if (!np) {
1365 pr_err("missing testcase data\n");
1366 return;
1367 }
1368
1369 ret = of_address_to_resource(np, 0, &res);
1370 unittest(ret == -EINVAL, "of_address_to_resource(%pOF) expected error on untranslatable address\n",
1371 np);
1372
1373 of_node_put(np);
1374
1375 }
1376
1377 struct of_unittest_expected_res {
1378 int index;
1379 struct resource res;
1380 };
1381
of_unittest_check_addr(const char * node_path,const struct of_unittest_expected_res * tab_exp,unsigned int tab_exp_count)1382 static void __init of_unittest_check_addr(const char *node_path,
1383 const struct of_unittest_expected_res *tab_exp,
1384 unsigned int tab_exp_count)
1385 {
1386 const struct of_unittest_expected_res *expected;
1387 struct device_node *np;
1388 struct resource res;
1389 unsigned int count;
1390 int ret;
1391
1392 if (!IS_ENABLED(CONFIG_OF_ADDRESS))
1393 return;
1394
1395 np = of_find_node_by_path(node_path);
1396 if (!np) {
1397 pr_err("missing testcase data (%s)\n", node_path);
1398 return;
1399 }
1400
1401 expected = tab_exp;
1402 count = tab_exp_count;
1403 while (count--) {
1404 ret = of_address_to_resource(np, expected->index, &res);
1405 unittest(!ret, "of_address_to_resource(%pOF, %d) returned error %d\n",
1406 np, expected->index, ret);
1407 unittest(resource_type(&res) == resource_type(&expected->res) &&
1408 res.start == expected->res.start &&
1409 resource_size(&res) == resource_size(&expected->res),
1410 "of_address_to_resource(%pOF, %d) wrong resource %pR, expected %pR\n",
1411 np, expected->index, &res, &expected->res);
1412 expected++;
1413 }
1414
1415 of_node_put(np);
1416 }
1417
1418 static const struct of_unittest_expected_res of_unittest_reg_2cell_expected_res[] = {
1419 {.index = 0, .res = DEFINE_RES_MEM(0xa0a01000, 0x100) },
1420 {.index = 1, .res = DEFINE_RES_MEM(0xa0a02000, 0x100) },
1421 {.index = 2, .res = DEFINE_RES_MEM(0xc0c01000, 0x100) },
1422 {.index = 3, .res = DEFINE_RES_MEM(0xd0d01000, 0x100) },
1423 };
1424
1425 static const struct of_unittest_expected_res of_unittest_reg_3cell_expected_res[] = {
1426 {.index = 0, .res = DEFINE_RES_MEM(0xa0a01000, 0x100) },
1427 {.index = 1, .res = DEFINE_RES_MEM(0xa0b02000, 0x100) },
1428 {.index = 2, .res = DEFINE_RES_MEM(0xc0c01000, 0x100) },
1429 {.index = 3, .res = DEFINE_RES_MEM(0xc0c09000, 0x100) },
1430 {.index = 4, .res = DEFINE_RES_MEM(0xd0d01000, 0x100) },
1431 };
1432
1433 static const struct of_unittest_expected_res of_unittest_reg_pci_expected_res[] = {
1434 {.index = 0, .res = DEFINE_RES_MEM(0xe8001000, 0x1000) },
1435 {.index = 1, .res = DEFINE_RES_MEM(0xea002000, 0x2000) },
1436 };
1437
of_unittest_translate_addr(void)1438 static void __init of_unittest_translate_addr(void)
1439 {
1440 of_unittest_check_addr("/testcase-data/address-tests2/bus-2cell@10000000/device@100000",
1441 of_unittest_reg_2cell_expected_res,
1442 ARRAY_SIZE(of_unittest_reg_2cell_expected_res));
1443
1444 of_unittest_check_addr("/testcase-data/address-tests2/bus-3cell@20000000/local-bus@100000/device@f1001000",
1445 of_unittest_reg_3cell_expected_res,
1446 ARRAY_SIZE(of_unittest_reg_3cell_expected_res));
1447
1448 of_unittest_check_addr("/testcase-data/address-tests2/pcie@d1070000/pci@0,0/dev@0,0/local-bus@0/dev@e0000000",
1449 of_unittest_reg_pci_expected_res,
1450 ARRAY_SIZE(of_unittest_reg_pci_expected_res));
1451 }
1452
of_unittest_parse_interrupts(void)1453 static void __init of_unittest_parse_interrupts(void)
1454 {
1455 struct device_node *np;
1456 struct of_phandle_args args;
1457 int i, rc;
1458
1459 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1460 return;
1461
1462 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
1463 if (!np) {
1464 pr_err("missing testcase data\n");
1465 return;
1466 }
1467
1468 for (i = 0; i < 4; i++) {
1469 bool passed = true;
1470
1471 memset(&args, 0, sizeof(args));
1472 rc = of_irq_parse_one(np, i, &args);
1473
1474 passed &= !rc;
1475 passed &= (args.args_count == 1);
1476 passed &= (args.args[0] == (i + 1));
1477
1478 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1479 i, args.np, rc);
1480 }
1481 of_node_put(np);
1482
1483 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
1484 if (!np) {
1485 pr_err("missing testcase data\n");
1486 return;
1487 }
1488
1489 for (i = 0; i < 4; i++) {
1490 bool passed = true;
1491
1492 memset(&args, 0, sizeof(args));
1493 rc = of_irq_parse_one(np, i, &args);
1494
1495 /* Test the values from tests-phandle.dtsi */
1496 switch (i) {
1497 case 0:
1498 passed &= !rc;
1499 passed &= (args.args_count == 1);
1500 passed &= (args.args[0] == 9);
1501 break;
1502 case 1:
1503 passed &= !rc;
1504 passed &= (args.args_count == 3);
1505 passed &= (args.args[0] == 10);
1506 passed &= (args.args[1] == 11);
1507 passed &= (args.args[2] == 12);
1508 break;
1509 case 2:
1510 passed &= !rc;
1511 passed &= (args.args_count == 2);
1512 passed &= (args.args[0] == 13);
1513 passed &= (args.args[1] == 14);
1514 break;
1515 case 3:
1516 passed &= !rc;
1517 passed &= (args.args_count == 2);
1518 passed &= (args.args[0] == 15);
1519 passed &= (args.args[1] == 16);
1520 break;
1521 default:
1522 passed = false;
1523 }
1524 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1525 i, args.np, rc);
1526 }
1527 of_node_put(np);
1528 }
1529
of_unittest_parse_interrupts_extended(void)1530 static void __init of_unittest_parse_interrupts_extended(void)
1531 {
1532 struct device_node *np;
1533 struct of_phandle_args args;
1534 int i, rc;
1535
1536 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1537 return;
1538
1539 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
1540 if (!np) {
1541 pr_err("missing testcase data\n");
1542 return;
1543 }
1544
1545 for (i = 0; i < 7; i++) {
1546 bool passed = true;
1547
1548 memset(&args, 0, sizeof(args));
1549 rc = of_irq_parse_one(np, i, &args);
1550
1551 /* Test the values from tests-phandle.dtsi */
1552 switch (i) {
1553 case 0:
1554 passed &= !rc;
1555 passed &= (args.args_count == 1);
1556 passed &= (args.args[0] == 1);
1557 break;
1558 case 1:
1559 passed &= !rc;
1560 passed &= (args.args_count == 3);
1561 passed &= (args.args[0] == 2);
1562 passed &= (args.args[1] == 3);
1563 passed &= (args.args[2] == 4);
1564 break;
1565 case 2:
1566 passed &= !rc;
1567 passed &= (args.args_count == 2);
1568 passed &= (args.args[0] == 5);
1569 passed &= (args.args[1] == 6);
1570 break;
1571 case 3:
1572 passed &= !rc;
1573 passed &= (args.args_count == 1);
1574 passed &= (args.args[0] == 9);
1575 break;
1576 case 4:
1577 passed &= !rc;
1578 passed &= (args.args_count == 3);
1579 passed &= (args.args[0] == 10);
1580 passed &= (args.args[1] == 11);
1581 passed &= (args.args[2] == 12);
1582 break;
1583 case 5:
1584 passed &= !rc;
1585 passed &= (args.args_count == 2);
1586 passed &= (args.args[0] == 13);
1587 passed &= (args.args[1] == 14);
1588 break;
1589 case 6:
1590 /*
1591 * Tests child node that is missing property
1592 * #address-cells. See the comments in
1593 * drivers/of/unittest-data/tests-interrupts.dtsi
1594 * nodes intmap1 and interrupts-extended0
1595 */
1596 passed &= !rc;
1597 passed &= (args.args_count == 1);
1598 passed &= (args.args[0] == 15);
1599 break;
1600 default:
1601 passed = false;
1602 }
1603
1604 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1605 i, args.np, rc);
1606 }
1607 of_node_put(np);
1608 }
1609
1610 static const struct of_device_id match_node_table[] = {
1611 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
1612 { .data = "B", .type = "type1", }, /* followed by type alone */
1613
1614 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
1615 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
1616 { .data = "Cc", .name = "name2", .type = "type2", },
1617
1618 { .data = "E", .compatible = "compat3" },
1619 { .data = "G", .compatible = "compat2", },
1620 { .data = "H", .compatible = "compat2", .name = "name5", },
1621 { .data = "I", .compatible = "compat2", .type = "type1", },
1622 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
1623 { .data = "K", .compatible = "compat2", .name = "name9", },
1624 {}
1625 };
1626
1627 static struct {
1628 const char *path;
1629 const char *data;
1630 } match_node_tests[] = {
1631 { .path = "/testcase-data/match-node/name0", .data = "A", },
1632 { .path = "/testcase-data/match-node/name1", .data = "B", },
1633 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
1634 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
1635 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
1636 { .path = "/testcase-data/match-node/name3", .data = "E", },
1637 { .path = "/testcase-data/match-node/name4", .data = "G", },
1638 { .path = "/testcase-data/match-node/name5", .data = "H", },
1639 { .path = "/testcase-data/match-node/name6", .data = "G", },
1640 { .path = "/testcase-data/match-node/name7", .data = "I", },
1641 { .path = "/testcase-data/match-node/name8", .data = "J", },
1642 { .path = "/testcase-data/match-node/name9", .data = "K", },
1643 };
1644
of_unittest_match_node(void)1645 static void __init of_unittest_match_node(void)
1646 {
1647 struct device_node *np;
1648 const struct of_device_id *match;
1649 int i;
1650
1651 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
1652 np = of_find_node_by_path(match_node_tests[i].path);
1653 if (!np) {
1654 unittest(0, "missing testcase node %s\n",
1655 match_node_tests[i].path);
1656 continue;
1657 }
1658
1659 match = of_match_node(match_node_table, np);
1660 if (!match) {
1661 unittest(0, "%s didn't match anything\n",
1662 match_node_tests[i].path);
1663 continue;
1664 }
1665
1666 if (strcmp(match->data, match_node_tests[i].data) != 0) {
1667 unittest(0, "%s got wrong match. expected %s, got %s\n",
1668 match_node_tests[i].path, match_node_tests[i].data,
1669 (const char *)match->data);
1670 continue;
1671 }
1672 unittest(1, "passed");
1673 }
1674 }
1675
1676 static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2);
1677 static const struct platform_device_info test_bus_info = {
1678 .name = "unittest-bus",
1679 };
of_unittest_platform_populate(void)1680 static void __init of_unittest_platform_populate(void)
1681 {
1682 int irq, rc;
1683 struct device_node *np, *child, *grandchild;
1684 struct platform_device *pdev, *test_bus;
1685 const struct of_device_id match[] = {
1686 { .compatible = "test-device", },
1687 {}
1688 };
1689
1690 np = of_find_node_by_path("/testcase-data");
1691 of_platform_default_populate(np, NULL, NULL);
1692
1693 /* Test that a missing irq domain returns -EPROBE_DEFER */
1694 np = of_find_node_by_path("/testcase-data/testcase-device1");
1695 pdev = of_find_device_by_node(np);
1696 unittest(pdev, "device 1 creation failed\n");
1697
1698 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
1699 irq = platform_get_irq(pdev, 0);
1700 unittest(irq == -EPROBE_DEFER,
1701 "device deferred probe failed - %d\n", irq);
1702
1703 /* Test that a parsing failure does not return -EPROBE_DEFER */
1704 np = of_find_node_by_path("/testcase-data/testcase-device2");
1705 pdev = of_find_device_by_node(np);
1706 unittest(pdev, "device 2 creation failed\n");
1707
1708 EXPECT_BEGIN(KERN_INFO,
1709 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1710
1711 irq = platform_get_irq(pdev, 0);
1712
1713 EXPECT_END(KERN_INFO,
1714 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1715
1716 unittest(irq < 0 && irq != -EPROBE_DEFER,
1717 "device parsing error failed - %d\n", irq);
1718 }
1719
1720 np = of_find_node_by_path("/testcase-data/platform-tests");
1721 unittest(np, "No testcase data in device tree\n");
1722 if (!np)
1723 return;
1724
1725 test_bus = platform_device_register_full(&test_bus_info);
1726 rc = PTR_ERR_OR_ZERO(test_bus);
1727 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1728 if (rc) {
1729 of_node_put(np);
1730 return;
1731 }
1732 test_bus->dev.of_node = np;
1733
1734 /*
1735 * Add a dummy resource to the test bus node after it is
1736 * registered to catch problems with un-inserted resources. The
1737 * DT code doesn't insert the resources, and it has caused the
1738 * kernel to oops in the past. This makes sure the same bug
1739 * doesn't crop up again.
1740 */
1741 platform_device_add_resources(test_bus, &test_bus_res, 1);
1742
1743 of_platform_populate(np, match, NULL, &test_bus->dev);
1744 for_each_child_of_node(np, child) {
1745 for_each_child_of_node(child, grandchild) {
1746 pdev = of_find_device_by_node(grandchild);
1747 unittest(pdev,
1748 "Could not create device for node '%pOFn'\n",
1749 grandchild);
1750 platform_device_put(pdev);
1751 }
1752 }
1753
1754 of_platform_depopulate(&test_bus->dev);
1755 for_each_child_of_node(np, child) {
1756 for_each_child_of_node(child, grandchild)
1757 unittest(!of_find_device_by_node(grandchild),
1758 "device didn't get destroyed '%pOFn'\n",
1759 grandchild);
1760 }
1761
1762 platform_device_unregister(test_bus);
1763 of_node_put(np);
1764 }
1765
1766 /**
1767 * update_node_properties - adds the properties
1768 * of np into dup node (present in live tree) and
1769 * updates parent of children of np to dup.
1770 *
1771 * @np: node whose properties are being added to the live tree
1772 * @dup: node present in live tree to be updated
1773 */
update_node_properties(struct device_node * np,struct device_node * dup)1774 static void update_node_properties(struct device_node *np,
1775 struct device_node *dup)
1776 {
1777 struct property *prop;
1778 struct property *save_next;
1779 struct device_node *child;
1780 int ret;
1781
1782 for_each_child_of_node(np, child)
1783 child->parent = dup;
1784
1785 /*
1786 * "unittest internal error: unable to add testdata property"
1787 *
1788 * If this message reports a property in node '/__symbols__' then
1789 * the respective unittest overlay contains a label that has the
1790 * same name as a label in the live devicetree. The label will
1791 * be in the live devicetree only if the devicetree source was
1792 * compiled with the '-@' option. If you encounter this error,
1793 * please consider renaming __all__ of the labels in the unittest
1794 * overlay dts files with an odd prefix that is unlikely to be
1795 * used in a real devicetree.
1796 */
1797
1798 /*
1799 * open code for_each_property_of_node() because of_add_property()
1800 * sets prop->next to NULL
1801 */
1802 for (prop = np->properties; prop != NULL; prop = save_next) {
1803 save_next = prop->next;
1804 ret = of_add_property(dup, prop);
1805 if (ret) {
1806 if (ret == -EEXIST && !strcmp(prop->name, "name"))
1807 continue;
1808 pr_err("unittest internal error: unable to add testdata property %pOF/%s",
1809 np, prop->name);
1810 }
1811 }
1812 }
1813
1814 /**
1815 * attach_node_and_children - attaches nodes
1816 * and its children to live tree.
1817 * CAUTION: misleading function name - if node @np already exists in
1818 * the live tree then children of @np are *not* attached to the live
1819 * tree. This works for the current test devicetree nodes because such
1820 * nodes do not have child nodes.
1821 *
1822 * @np: Node to attach to live tree
1823 */
attach_node_and_children(struct device_node * np)1824 static void attach_node_and_children(struct device_node *np)
1825 {
1826 struct device_node *next, *dup, *child;
1827 unsigned long flags;
1828 const char *full_name;
1829
1830 full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1831 if (!full_name)
1832 return;
1833
1834 if (!strcmp(full_name, "/__local_fixups__") ||
1835 !strcmp(full_name, "/__fixups__")) {
1836 kfree(full_name);
1837 return;
1838 }
1839
1840 dup = of_find_node_by_path(full_name);
1841 kfree(full_name);
1842 if (dup) {
1843 update_node_properties(np, dup);
1844 return;
1845 }
1846
1847 child = np->child;
1848 np->child = NULL;
1849
1850 mutex_lock(&of_mutex);
1851 raw_spin_lock_irqsave(&devtree_lock, flags);
1852 np->sibling = np->parent->child;
1853 np->parent->child = np;
1854 of_node_clear_flag(np, OF_DETACHED);
1855 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1856
1857 __of_attach_node_sysfs(np);
1858 mutex_unlock(&of_mutex);
1859
1860 while (child) {
1861 next = child->sibling;
1862 attach_node_and_children(child);
1863 child = next;
1864 }
1865 }
1866
1867 /**
1868 * unittest_data_add - Reads, copies data from
1869 * linked tree and attaches it to the live tree
1870 */
unittest_data_add(void)1871 static int __init unittest_data_add(void)
1872 {
1873 void *unittest_data;
1874 void *unittest_data_align;
1875 struct device_node *unittest_data_node = NULL, *np;
1876 /*
1877 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
1878 * created by cmd_wrap_S_dtbo in scripts/Makefile.dtbs
1879 */
1880 extern uint8_t __dtbo_testcases_begin[];
1881 extern uint8_t __dtbo_testcases_end[];
1882 const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
1883 int rc;
1884 void *ret;
1885
1886 if (!size) {
1887 pr_warn("%s: testcases is empty\n", __func__);
1888 return -ENODATA;
1889 }
1890
1891 /* creating copy */
1892 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
1893 if (!unittest_data)
1894 return -ENOMEM;
1895
1896 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
1897 memcpy(unittest_data_align, __dtbo_testcases_begin, size);
1898
1899 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
1900 if (!ret) {
1901 pr_warn("%s: unflatten testcases tree failed\n", __func__);
1902 kfree(unittest_data);
1903 return -ENODATA;
1904 }
1905 if (!unittest_data_node) {
1906 pr_warn("%s: testcases tree is empty\n", __func__);
1907 kfree(unittest_data);
1908 return -ENODATA;
1909 }
1910
1911 /*
1912 * This lock normally encloses of_resolve_phandles()
1913 */
1914 of_overlay_mutex_lock();
1915
1916 rc = of_resolve_phandles(unittest_data_node);
1917 if (rc) {
1918 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1919 rc = -EINVAL;
1920 goto unlock;
1921 }
1922
1923 /* attach the sub-tree to live tree */
1924 if (!of_root) {
1925 pr_warn("%s: no live tree to attach sub-tree\n", __func__);
1926 kfree(unittest_data);
1927 rc = -ENODEV;
1928 goto unlock;
1929 }
1930
1931 EXPECT_BEGIN(KERN_INFO,
1932 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1933
1934 np = unittest_data_node->child;
1935 while (np) {
1936 struct device_node *next = np->sibling;
1937
1938 np->parent = of_root;
1939 /* this will clear OF_DETACHED in np and children */
1940 attach_node_and_children(np);
1941 np = next;
1942 }
1943
1944 EXPECT_END(KERN_INFO,
1945 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1946
1947 unlock:
1948 of_overlay_mutex_unlock();
1949
1950 return rc;
1951 }
1952
1953 #ifdef CONFIG_OF_OVERLAY
1954 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id);
1955
unittest_probe(struct platform_device * pdev)1956 static int unittest_probe(struct platform_device *pdev)
1957 {
1958 struct device *dev = &pdev->dev;
1959 struct device_node *np = dev->of_node;
1960
1961 if (np == NULL) {
1962 dev_err(dev, "No OF data for device\n");
1963 return -EINVAL;
1964
1965 }
1966
1967 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1968
1969 of_platform_populate(np, NULL, NULL, &pdev->dev);
1970
1971 return 0;
1972 }
1973
unittest_remove(struct platform_device * pdev)1974 static void unittest_remove(struct platform_device *pdev)
1975 {
1976 struct device *dev = &pdev->dev;
1977 struct device_node *np = dev->of_node;
1978
1979 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1980 }
1981
1982 static const struct of_device_id unittest_match[] = {
1983 { .compatible = "unittest", },
1984 {},
1985 };
1986
1987 static struct platform_driver unittest_driver = {
1988 .probe = unittest_probe,
1989 .remove_new = unittest_remove,
1990 .driver = {
1991 .name = "unittest",
1992 .of_match_table = unittest_match,
1993 },
1994 };
1995
1996 /* get the platform device instantiated at the path */
of_path_to_platform_device(const char * path)1997 static struct platform_device *of_path_to_platform_device(const char *path)
1998 {
1999 struct device_node *np;
2000 struct platform_device *pdev;
2001
2002 np = of_find_node_by_path(path);
2003 if (np == NULL)
2004 return NULL;
2005
2006 pdev = of_find_device_by_node(np);
2007 of_node_put(np);
2008
2009 return pdev;
2010 }
2011
2012 /* find out if a platform device exists at that path */
of_path_platform_device_exists(const char * path)2013 static int of_path_platform_device_exists(const char *path)
2014 {
2015 struct platform_device *pdev;
2016
2017 pdev = of_path_to_platform_device(path);
2018 platform_device_put(pdev);
2019 return pdev != NULL;
2020 }
2021
2022 #ifdef CONFIG_OF_GPIO
2023
2024 struct unittest_gpio_dev {
2025 struct gpio_chip chip;
2026 };
2027
2028 static int unittest_gpio_chip_request_count;
2029 static int unittest_gpio_probe_count;
2030 static int unittest_gpio_probe_pass_count;
2031
unittest_gpio_chip_request(struct gpio_chip * chip,unsigned int offset)2032 static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
2033 {
2034 unittest_gpio_chip_request_count++;
2035
2036 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
2037 unittest_gpio_chip_request_count);
2038 return 0;
2039 }
2040
unittest_gpio_probe(struct platform_device * pdev)2041 static int unittest_gpio_probe(struct platform_device *pdev)
2042 {
2043 struct unittest_gpio_dev *devptr;
2044 int ret;
2045
2046 unittest_gpio_probe_count++;
2047
2048 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
2049 if (!devptr)
2050 return -ENOMEM;
2051
2052 platform_set_drvdata(pdev, devptr);
2053
2054 devptr->chip.fwnode = dev_fwnode(&pdev->dev);
2055 devptr->chip.label = "of-unittest-gpio";
2056 devptr->chip.base = -1; /* dynamic allocation */
2057 devptr->chip.ngpio = 5;
2058 devptr->chip.request = unittest_gpio_chip_request;
2059
2060 ret = gpiochip_add_data(&devptr->chip, NULL);
2061
2062 unittest(!ret,
2063 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret);
2064
2065 if (!ret)
2066 unittest_gpio_probe_pass_count++;
2067 return ret;
2068 }
2069
unittest_gpio_remove(struct platform_device * pdev)2070 static void unittest_gpio_remove(struct platform_device *pdev)
2071 {
2072 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev);
2073 struct device *dev = &pdev->dev;
2074
2075 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode);
2076
2077 if (devptr->chip.base != -1)
2078 gpiochip_remove(&devptr->chip);
2079
2080 kfree(devptr);
2081 }
2082
2083 static const struct of_device_id unittest_gpio_id[] = {
2084 { .compatible = "unittest-gpio", },
2085 {}
2086 };
2087
2088 static struct platform_driver unittest_gpio_driver = {
2089 .probe = unittest_gpio_probe,
2090 .remove_new = unittest_gpio_remove,
2091 .driver = {
2092 .name = "unittest-gpio",
2093 .of_match_table = unittest_gpio_id,
2094 },
2095 };
2096
of_unittest_overlay_gpio(void)2097 static void __init of_unittest_overlay_gpio(void)
2098 {
2099 int chip_request_count;
2100 int probe_pass_count;
2101 int ret;
2102
2103 /*
2104 * tests: apply overlays before registering driver
2105 * Similar to installing a driver as a module, the
2106 * driver is registered after applying the overlays.
2107 *
2108 * The overlays are applied by overlay_data_apply()
2109 * instead of of_unittest_apply_overlay() so that they
2110 * will not be tracked. Thus they will not be removed
2111 * by of_unittest_remove_tracked_overlays().
2112 *
2113 * - apply overlay_gpio_01
2114 * - apply overlay_gpio_02a
2115 * - apply overlay_gpio_02b
2116 * - register driver
2117 *
2118 * register driver will result in
2119 * - probe and processing gpio hog for overlay_gpio_01
2120 * - probe for overlay_gpio_02a
2121 * - processing gpio for overlay_gpio_02b
2122 */
2123
2124 probe_pass_count = unittest_gpio_probe_pass_count;
2125 chip_request_count = unittest_gpio_chip_request_count;
2126
2127 /*
2128 * overlay_gpio_01 contains gpio node and child gpio hog node
2129 * overlay_gpio_02a contains gpio node
2130 * overlay_gpio_02b contains child gpio hog node
2131 */
2132
2133 unittest(overlay_data_apply("overlay_gpio_01", NULL),
2134 "Adding overlay 'overlay_gpio_01' failed\n");
2135
2136 unittest(overlay_data_apply("overlay_gpio_02a", NULL),
2137 "Adding overlay 'overlay_gpio_02a' failed\n");
2138
2139 unittest(overlay_data_apply("overlay_gpio_02b", NULL),
2140 "Adding overlay 'overlay_gpio_02b' failed\n");
2141
2142 ret = platform_driver_register(&unittest_gpio_driver);
2143 if (unittest(ret == 0, "could not register unittest gpio driver\n"))
2144 return;
2145
2146 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
2147 "unittest_gpio_probe() failed or not called\n");
2148
2149 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
2150 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2151 unittest_gpio_chip_request_count - chip_request_count);
2152
2153 /*
2154 * tests: apply overlays after registering driver
2155 *
2156 * Similar to a driver built-in to the kernel, the
2157 * driver is registered before applying the overlays.
2158 *
2159 * overlay_gpio_03 contains gpio node and child gpio hog node
2160 *
2161 * - apply overlay_gpio_03
2162 *
2163 * apply overlay will result in
2164 * - probe and processing gpio hog.
2165 */
2166
2167 probe_pass_count = unittest_gpio_probe_pass_count;
2168 chip_request_count = unittest_gpio_chip_request_count;
2169
2170 /* overlay_gpio_03 contains gpio node and child gpio hog node */
2171
2172 unittest(overlay_data_apply("overlay_gpio_03", NULL),
2173 "Adding overlay 'overlay_gpio_03' failed\n");
2174
2175 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
2176 "unittest_gpio_probe() failed or not called\n");
2177
2178 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
2179 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2180 unittest_gpio_chip_request_count - chip_request_count);
2181
2182 /*
2183 * overlay_gpio_04a contains gpio node
2184 *
2185 * - apply overlay_gpio_04a
2186 *
2187 * apply the overlay will result in
2188 * - probe for overlay_gpio_04a
2189 */
2190
2191 probe_pass_count = unittest_gpio_probe_pass_count;
2192 chip_request_count = unittest_gpio_chip_request_count;
2193
2194 /* overlay_gpio_04a contains gpio node */
2195
2196 unittest(overlay_data_apply("overlay_gpio_04a", NULL),
2197 "Adding overlay 'overlay_gpio_04a' failed\n");
2198
2199 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
2200 "unittest_gpio_probe() failed or not called\n");
2201
2202 /*
2203 * overlay_gpio_04b contains child gpio hog node
2204 *
2205 * - apply overlay_gpio_04b
2206 *
2207 * apply the overlay will result in
2208 * - processing gpio for overlay_gpio_04b
2209 */
2210
2211 /* overlay_gpio_04b contains child gpio hog node */
2212
2213 unittest(overlay_data_apply("overlay_gpio_04b", NULL),
2214 "Adding overlay 'overlay_gpio_04b' failed\n");
2215
2216 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
2217 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2218 unittest_gpio_chip_request_count - chip_request_count);
2219 }
2220
2221 #else
2222
of_unittest_overlay_gpio(void)2223 static void __init of_unittest_overlay_gpio(void)
2224 {
2225 /* skip tests */
2226 }
2227
2228 #endif
2229
2230 #if IS_BUILTIN(CONFIG_I2C)
2231
2232 /* get the i2c client device instantiated at the path */
of_path_to_i2c_client(const char * path)2233 static struct i2c_client *of_path_to_i2c_client(const char *path)
2234 {
2235 struct device_node *np;
2236 struct i2c_client *client;
2237
2238 np = of_find_node_by_path(path);
2239 if (np == NULL)
2240 return NULL;
2241
2242 client = of_find_i2c_device_by_node(np);
2243 of_node_put(np);
2244
2245 return client;
2246 }
2247
2248 /* find out if a i2c client device exists at that path */
of_path_i2c_client_exists(const char * path)2249 static int of_path_i2c_client_exists(const char *path)
2250 {
2251 struct i2c_client *client;
2252
2253 client = of_path_to_i2c_client(path);
2254 if (client)
2255 put_device(&client->dev);
2256 return client != NULL;
2257 }
2258 #else
of_path_i2c_client_exists(const char * path)2259 static int of_path_i2c_client_exists(const char *path)
2260 {
2261 return 0;
2262 }
2263 #endif
2264
2265 enum overlay_type {
2266 PDEV_OVERLAY,
2267 I2C_OVERLAY
2268 };
2269
of_path_device_type_exists(const char * path,enum overlay_type ovtype)2270 static int of_path_device_type_exists(const char *path,
2271 enum overlay_type ovtype)
2272 {
2273 switch (ovtype) {
2274 case PDEV_OVERLAY:
2275 return of_path_platform_device_exists(path);
2276 case I2C_OVERLAY:
2277 return of_path_i2c_client_exists(path);
2278 }
2279 return 0;
2280 }
2281
unittest_path(int nr,enum overlay_type ovtype)2282 static const char *unittest_path(int nr, enum overlay_type ovtype)
2283 {
2284 const char *base;
2285 static char buf[256];
2286
2287 switch (ovtype) {
2288 case PDEV_OVERLAY:
2289 base = "/testcase-data/overlay-node/test-bus";
2290 break;
2291 case I2C_OVERLAY:
2292 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
2293 break;
2294 default:
2295 buf[0] = '\0';
2296 return buf;
2297 }
2298 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
2299 buf[sizeof(buf) - 1] = '\0';
2300 return buf;
2301 }
2302
of_unittest_device_exists(int unittest_nr,enum overlay_type ovtype)2303 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
2304 {
2305 const char *path;
2306
2307 path = unittest_path(unittest_nr, ovtype);
2308
2309 switch (ovtype) {
2310 case PDEV_OVERLAY:
2311 return of_path_platform_device_exists(path);
2312 case I2C_OVERLAY:
2313 return of_path_i2c_client_exists(path);
2314 }
2315 return 0;
2316 }
2317
overlay_name_from_nr(int nr)2318 static const char *overlay_name_from_nr(int nr)
2319 {
2320 static char buf[256];
2321
2322 snprintf(buf, sizeof(buf) - 1,
2323 "overlay_%d", nr);
2324 buf[sizeof(buf) - 1] = '\0';
2325
2326 return buf;
2327 }
2328
2329 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
2330
2331 #define MAX_TRACK_OVCS_IDS 256
2332
2333 static int track_ovcs_id[MAX_TRACK_OVCS_IDS];
2334 static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS];
2335 static int track_ovcs_id_cnt;
2336
of_unittest_track_overlay(int ovcs_id,int overlay_nr)2337 static void of_unittest_track_overlay(int ovcs_id, int overlay_nr)
2338 {
2339 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS))
2340 return;
2341
2342 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id;
2343 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr;
2344 track_ovcs_id_cnt++;
2345 }
2346
of_unittest_untrack_overlay(int ovcs_id)2347 static void of_unittest_untrack_overlay(int ovcs_id)
2348 {
2349 if (WARN_ON(track_ovcs_id_cnt < 1))
2350 return;
2351
2352 track_ovcs_id_cnt--;
2353
2354 /* If out of synch then test is broken. Do not try to recover. */
2355 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id);
2356 }
2357
of_unittest_remove_tracked_overlays(void)2358 static void of_unittest_remove_tracked_overlays(void)
2359 {
2360 int ret, ovcs_id, overlay_nr, save_ovcs_id;
2361 const char *overlay_name;
2362
2363 while (track_ovcs_id_cnt > 0) {
2364
2365 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1];
2366 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1];
2367 save_ovcs_id = ovcs_id;
2368 ret = of_overlay_remove(&ovcs_id);
2369 if (ret == -ENODEV) {
2370 overlay_name = overlay_name_from_nr(overlay_nr);
2371 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n",
2372 __func__, overlay_name, ret);
2373 }
2374 of_unittest_untrack_overlay(save_ovcs_id);
2375 }
2376
2377 }
2378
of_unittest_apply_overlay(int overlay_nr,int * ovcs_id)2379 static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id)
2380 {
2381 /*
2382 * The overlay will be tracked, thus it will be removed
2383 * by of_unittest_remove_tracked_overlays().
2384 */
2385
2386 const char *overlay_name;
2387
2388 overlay_name = overlay_name_from_nr(overlay_nr);
2389
2390 if (!overlay_data_apply(overlay_name, ovcs_id)) {
2391 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2392 return -EFAULT;
2393 }
2394 of_unittest_track_overlay(*ovcs_id, overlay_nr);
2395
2396 return 0;
2397 }
2398
__of_unittest_apply_overlay_check(int overlay_nr,int unittest_nr,int before,int after,enum overlay_type ovtype)2399 static int __init __of_unittest_apply_overlay_check(int overlay_nr,
2400 int unittest_nr, int before, int after,
2401 enum overlay_type ovtype)
2402 {
2403 int ret, ovcs_id;
2404
2405 /* unittest device must be in before state */
2406 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
2407 unittest(0, "%s with device @\"%s\" %s\n",
2408 overlay_name_from_nr(overlay_nr),
2409 unittest_path(unittest_nr, ovtype),
2410 !before ? "enabled" : "disabled");
2411 return -EINVAL;
2412 }
2413
2414 /* apply the overlay */
2415 ovcs_id = 0;
2416 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
2417 if (ret != 0) {
2418 /* of_unittest_apply_overlay already called unittest() */
2419 return ret;
2420 }
2421
2422 /* unittest device must be in after state */
2423 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
2424 unittest(0, "%s with device @\"%s\" %s\n",
2425 overlay_name_from_nr(overlay_nr),
2426 unittest_path(unittest_nr, ovtype),
2427 !after ? "enabled" : "disabled");
2428 return -EINVAL;
2429 }
2430
2431 return ovcs_id;
2432 }
2433
2434 /* apply an overlay while checking before and after states */
of_unittest_apply_overlay_check(int overlay_nr,int unittest_nr,int before,int after,enum overlay_type ovtype)2435 static int __init of_unittest_apply_overlay_check(int overlay_nr,
2436 int unittest_nr, int before, int after,
2437 enum overlay_type ovtype)
2438 {
2439 int ovcs_id = __of_unittest_apply_overlay_check(overlay_nr,
2440 unittest_nr, before, after, ovtype);
2441 if (ovcs_id < 0)
2442 return ovcs_id;
2443
2444 return 0;
2445 }
2446
2447 /* apply an overlay and then revert it while checking before, after states */
of_unittest_apply_revert_overlay_check(int overlay_nr,int unittest_nr,int before,int after,enum overlay_type ovtype)2448 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
2449 int unittest_nr, int before, int after,
2450 enum overlay_type ovtype)
2451 {
2452 int ret, ovcs_id, save_ovcs_id;
2453
2454 ovcs_id = __of_unittest_apply_overlay_check(overlay_nr, unittest_nr,
2455 before, after, ovtype);
2456 if (ovcs_id < 0)
2457 return ovcs_id;
2458
2459 /* remove the overlay */
2460 save_ovcs_id = ovcs_id;
2461 ret = of_overlay_remove(&ovcs_id);
2462 if (ret != 0) {
2463 unittest(0, "%s failed to be destroyed @\"%s\"\n",
2464 overlay_name_from_nr(overlay_nr),
2465 unittest_path(unittest_nr, ovtype));
2466 return ret;
2467 }
2468 of_unittest_untrack_overlay(save_ovcs_id);
2469
2470 /* unittest device must be again in before state */
2471 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
2472 unittest(0, "%s with device @\"%s\" %s\n",
2473 overlay_name_from_nr(overlay_nr),
2474 unittest_path(unittest_nr, ovtype),
2475 !before ? "enabled" : "disabled");
2476 return -EINVAL;
2477 }
2478
2479 return 0;
2480 }
2481
2482 /* test activation of device */
of_unittest_overlay_0(void)2483 static void __init of_unittest_overlay_0(void)
2484 {
2485 int ret;
2486
2487 EXPECT_BEGIN(KERN_INFO,
2488 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2489
2490 /* device should enable */
2491 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
2492
2493 EXPECT_END(KERN_INFO,
2494 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2495
2496 if (ret)
2497 return;
2498
2499 unittest(1, "overlay test %d passed\n", 0);
2500 }
2501
2502 /* test deactivation of device */
of_unittest_overlay_1(void)2503 static void __init of_unittest_overlay_1(void)
2504 {
2505 int ret;
2506
2507 EXPECT_BEGIN(KERN_INFO,
2508 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2509
2510 /* device should disable */
2511 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
2512
2513 EXPECT_END(KERN_INFO,
2514 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2515
2516 if (ret)
2517 return;
2518
2519 unittest(1, "overlay test %d passed\n", 1);
2520
2521 }
2522
2523 /* test activation of device */
of_unittest_overlay_2(void)2524 static void __init of_unittest_overlay_2(void)
2525 {
2526 int ret;
2527
2528 EXPECT_BEGIN(KERN_INFO,
2529 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2530
2531 /* device should enable */
2532 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
2533
2534 EXPECT_END(KERN_INFO,
2535 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2536
2537 if (ret)
2538 return;
2539 unittest(1, "overlay test %d passed\n", 2);
2540 }
2541
2542 /* test deactivation of device */
of_unittest_overlay_3(void)2543 static void __init of_unittest_overlay_3(void)
2544 {
2545 int ret;
2546
2547 EXPECT_BEGIN(KERN_INFO,
2548 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2549
2550 /* device should disable */
2551 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
2552
2553 EXPECT_END(KERN_INFO,
2554 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2555
2556 if (ret)
2557 return;
2558
2559 unittest(1, "overlay test %d passed\n", 3);
2560 }
2561
2562 /* test activation of a full device node */
of_unittest_overlay_4(void)2563 static void __init of_unittest_overlay_4(void)
2564 {
2565 /* device should disable */
2566 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
2567 return;
2568
2569 unittest(1, "overlay test %d passed\n", 4);
2570 }
2571
2572 /* test overlay apply/revert sequence */
of_unittest_overlay_5(void)2573 static void __init of_unittest_overlay_5(void)
2574 {
2575 int ret;
2576
2577 EXPECT_BEGIN(KERN_INFO,
2578 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2579
2580 /* device should disable */
2581 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
2582
2583 EXPECT_END(KERN_INFO,
2584 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2585
2586 if (ret)
2587 return;
2588
2589 unittest(1, "overlay test %d passed\n", 5);
2590 }
2591
2592 /* test overlay application in sequence */
of_unittest_overlay_6(void)2593 static void __init of_unittest_overlay_6(void)
2594 {
2595 int i, save_ovcs_id[2], ovcs_id;
2596 int overlay_nr = 6, unittest_nr = 6;
2597 int before = 0, after = 1;
2598 const char *overlay_name;
2599
2600 int ret;
2601
2602 /* unittest device must be in before state */
2603 for (i = 0; i < 2; i++) {
2604 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2605 != before) {
2606 unittest(0, "%s with device @\"%s\" %s\n",
2607 overlay_name_from_nr(overlay_nr + i),
2608 unittest_path(unittest_nr + i,
2609 PDEV_OVERLAY),
2610 !before ? "enabled" : "disabled");
2611 return;
2612 }
2613 }
2614
2615 /* apply the overlays */
2616
2617 EXPECT_BEGIN(KERN_INFO,
2618 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2619
2620 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2621
2622 ret = overlay_data_apply(overlay_name, &ovcs_id);
2623
2624 if (!ret) {
2625 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2626 return;
2627 }
2628 save_ovcs_id[0] = ovcs_id;
2629 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2630
2631 EXPECT_END(KERN_INFO,
2632 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2633
2634 EXPECT_BEGIN(KERN_INFO,
2635 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2636
2637 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2638
2639 ret = overlay_data_apply(overlay_name, &ovcs_id);
2640
2641 if (!ret) {
2642 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2643 return;
2644 }
2645 save_ovcs_id[1] = ovcs_id;
2646 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2647
2648 EXPECT_END(KERN_INFO,
2649 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2650
2651
2652 for (i = 0; i < 2; i++) {
2653 /* unittest device must be in after state */
2654 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2655 != after) {
2656 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
2657 overlay_name_from_nr(overlay_nr + i),
2658 unittest_path(unittest_nr + i,
2659 PDEV_OVERLAY),
2660 !after ? "enabled" : "disabled");
2661 return;
2662 }
2663 }
2664
2665 for (i = 1; i >= 0; i--) {
2666 ovcs_id = save_ovcs_id[i];
2667 if (of_overlay_remove(&ovcs_id)) {
2668 unittest(0, "%s failed destroy @\"%s\"\n",
2669 overlay_name_from_nr(overlay_nr + i),
2670 unittest_path(unittest_nr + i,
2671 PDEV_OVERLAY));
2672 return;
2673 }
2674 of_unittest_untrack_overlay(save_ovcs_id[i]);
2675 }
2676
2677 for (i = 0; i < 2; i++) {
2678 /* unittest device must be again in before state */
2679 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2680 != before) {
2681 unittest(0, "%s with device @\"%s\" %s\n",
2682 overlay_name_from_nr(overlay_nr + i),
2683 unittest_path(unittest_nr + i,
2684 PDEV_OVERLAY),
2685 !before ? "enabled" : "disabled");
2686 return;
2687 }
2688 }
2689
2690 unittest(1, "overlay test %d passed\n", 6);
2691
2692 }
2693
2694 /* test overlay application in sequence */
of_unittest_overlay_8(void)2695 static void __init of_unittest_overlay_8(void)
2696 {
2697 int i, save_ovcs_id[2], ovcs_id;
2698 int overlay_nr = 8, unittest_nr = 8;
2699 const char *overlay_name;
2700 int ret;
2701
2702 /* we don't care about device state in this test */
2703
2704 EXPECT_BEGIN(KERN_INFO,
2705 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2706
2707 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2708
2709 ret = overlay_data_apply(overlay_name, &ovcs_id);
2710 if (!ret)
2711 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2712
2713 EXPECT_END(KERN_INFO,
2714 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2715
2716 if (!ret)
2717 return;
2718
2719 save_ovcs_id[0] = ovcs_id;
2720 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2721
2722 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2723
2724 EXPECT_BEGIN(KERN_INFO,
2725 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2726
2727 /* apply the overlays */
2728 ret = overlay_data_apply(overlay_name, &ovcs_id);
2729
2730 EXPECT_END(KERN_INFO,
2731 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2732
2733 if (!ret) {
2734 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2735 return;
2736 }
2737
2738 save_ovcs_id[1] = ovcs_id;
2739 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2740
2741 /* now try to remove first overlay (it should fail) */
2742 ovcs_id = save_ovcs_id[0];
2743
2744 EXPECT_BEGIN(KERN_INFO,
2745 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2746
2747 EXPECT_BEGIN(KERN_INFO,
2748 "OF: overlay: overlay #6 is not topmost");
2749
2750 ret = of_overlay_remove(&ovcs_id);
2751
2752 EXPECT_END(KERN_INFO,
2753 "OF: overlay: overlay #6 is not topmost");
2754
2755 EXPECT_END(KERN_INFO,
2756 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2757
2758 if (!ret) {
2759 /*
2760 * Should never get here. If we do, expect a lot of
2761 * subsequent tracking and overlay removal related errors.
2762 */
2763 unittest(0, "%s was destroyed @\"%s\"\n",
2764 overlay_name_from_nr(overlay_nr + 0),
2765 unittest_path(unittest_nr,
2766 PDEV_OVERLAY));
2767 return;
2768 }
2769
2770 /* removing them in order should work */
2771 for (i = 1; i >= 0; i--) {
2772 ovcs_id = save_ovcs_id[i];
2773 if (of_overlay_remove(&ovcs_id)) {
2774 unittest(0, "%s not destroyed @\"%s\"\n",
2775 overlay_name_from_nr(overlay_nr + i),
2776 unittest_path(unittest_nr,
2777 PDEV_OVERLAY));
2778 return;
2779 }
2780 of_unittest_untrack_overlay(save_ovcs_id[i]);
2781 }
2782
2783 unittest(1, "overlay test %d passed\n", 8);
2784 }
2785
2786 /* test insertion of a bus with parent devices */
of_unittest_overlay_10(void)2787 static void __init of_unittest_overlay_10(void)
2788 {
2789 int ret;
2790 char *child_path;
2791
2792 /* device should disable */
2793 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
2794
2795 if (unittest(ret == 0,
2796 "overlay test %d failed; overlay application\n", 10))
2797 return;
2798
2799 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
2800 unittest_path(10, PDEV_OVERLAY));
2801 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
2802 return;
2803
2804 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
2805 kfree(child_path);
2806
2807 unittest(ret, "overlay test %d failed; no child device\n", 10);
2808 }
2809
2810 /* test insertion of a bus with parent devices (and revert) */
of_unittest_overlay_11(void)2811 static void __init of_unittest_overlay_11(void)
2812 {
2813 int ret;
2814
2815 /* device should disable */
2816 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
2817 PDEV_OVERLAY);
2818
2819 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
2820 }
2821
2822 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
2823
2824 struct unittest_i2c_bus_data {
2825 struct platform_device *pdev;
2826 struct i2c_adapter adap;
2827 };
2828
unittest_i2c_master_xfer(struct i2c_adapter * adap,struct i2c_msg * msgs,int num)2829 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
2830 struct i2c_msg *msgs, int num)
2831 {
2832 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
2833
2834 (void)std;
2835
2836 return num;
2837 }
2838
unittest_i2c_functionality(struct i2c_adapter * adap)2839 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
2840 {
2841 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
2842 }
2843
2844 static const struct i2c_algorithm unittest_i2c_algo = {
2845 .master_xfer = unittest_i2c_master_xfer,
2846 .functionality = unittest_i2c_functionality,
2847 };
2848
unittest_i2c_bus_probe(struct platform_device * pdev)2849 static int unittest_i2c_bus_probe(struct platform_device *pdev)
2850 {
2851 struct device *dev = &pdev->dev;
2852 struct device_node *np = dev->of_node;
2853 struct unittest_i2c_bus_data *std;
2854 struct i2c_adapter *adap;
2855 int ret;
2856
2857 if (np == NULL) {
2858 dev_err(dev, "No OF data for device\n");
2859 return -EINVAL;
2860
2861 }
2862
2863 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2864
2865 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
2866 if (!std)
2867 return -ENOMEM;
2868
2869 /* link them together */
2870 std->pdev = pdev;
2871 platform_set_drvdata(pdev, std);
2872
2873 adap = &std->adap;
2874 i2c_set_adapdata(adap, std);
2875 adap->nr = -1;
2876 strscpy(adap->name, pdev->name, sizeof(adap->name));
2877 adap->class = I2C_CLASS_DEPRECATED;
2878 adap->algo = &unittest_i2c_algo;
2879 adap->dev.parent = dev;
2880 adap->dev.of_node = dev->of_node;
2881 adap->timeout = 5 * HZ;
2882 adap->retries = 3;
2883
2884 ret = i2c_add_numbered_adapter(adap);
2885 if (ret != 0) {
2886 dev_err(dev, "Failed to add I2C adapter\n");
2887 return ret;
2888 }
2889
2890 return 0;
2891 }
2892
unittest_i2c_bus_remove(struct platform_device * pdev)2893 static void unittest_i2c_bus_remove(struct platform_device *pdev)
2894 {
2895 struct device *dev = &pdev->dev;
2896 struct device_node *np = dev->of_node;
2897 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
2898
2899 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2900 i2c_del_adapter(&std->adap);
2901 }
2902
2903 static const struct of_device_id unittest_i2c_bus_match[] = {
2904 { .compatible = "unittest-i2c-bus", },
2905 {},
2906 };
2907
2908 static struct platform_driver unittest_i2c_bus_driver = {
2909 .probe = unittest_i2c_bus_probe,
2910 .remove_new = unittest_i2c_bus_remove,
2911 .driver = {
2912 .name = "unittest-i2c-bus",
2913 .of_match_table = unittest_i2c_bus_match,
2914 },
2915 };
2916
unittest_i2c_dev_probe(struct i2c_client * client)2917 static int unittest_i2c_dev_probe(struct i2c_client *client)
2918 {
2919 struct device *dev = &client->dev;
2920 struct device_node *np = client->dev.of_node;
2921
2922 if (!np) {
2923 dev_err(dev, "No OF node\n");
2924 return -EINVAL;
2925 }
2926
2927 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2928
2929 return 0;
2930 };
2931
unittest_i2c_dev_remove(struct i2c_client * client)2932 static void unittest_i2c_dev_remove(struct i2c_client *client)
2933 {
2934 struct device *dev = &client->dev;
2935 struct device_node *np = client->dev.of_node;
2936
2937 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2938 }
2939
2940 static const struct i2c_device_id unittest_i2c_dev_id[] = {
2941 { .name = "unittest-i2c-dev" },
2942 { }
2943 };
2944
2945 static struct i2c_driver unittest_i2c_dev_driver = {
2946 .driver = {
2947 .name = "unittest-i2c-dev",
2948 },
2949 .probe = unittest_i2c_dev_probe,
2950 .remove = unittest_i2c_dev_remove,
2951 .id_table = unittest_i2c_dev_id,
2952 };
2953
2954 #if IS_BUILTIN(CONFIG_I2C_MUX)
2955
unittest_i2c_mux_select_chan(struct i2c_mux_core * muxc,u32 chan)2956 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
2957 {
2958 return 0;
2959 }
2960
unittest_i2c_mux_probe(struct i2c_client * client)2961 static int unittest_i2c_mux_probe(struct i2c_client *client)
2962 {
2963 int i, nchans;
2964 struct device *dev = &client->dev;
2965 struct i2c_adapter *adap = client->adapter;
2966 struct device_node *np = client->dev.of_node, *child;
2967 struct i2c_mux_core *muxc;
2968 u32 reg, max_reg;
2969
2970 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2971
2972 if (!np) {
2973 dev_err(dev, "No OF node\n");
2974 return -EINVAL;
2975 }
2976
2977 max_reg = (u32)-1;
2978 for_each_child_of_node(np, child) {
2979 if (of_property_read_u32(child, "reg", ®))
2980 continue;
2981 if (max_reg == (u32)-1 || reg > max_reg)
2982 max_reg = reg;
2983 }
2984 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
2985 if (nchans == 0) {
2986 dev_err(dev, "No channels\n");
2987 return -EINVAL;
2988 }
2989
2990 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
2991 unittest_i2c_mux_select_chan, NULL);
2992 if (!muxc)
2993 return -ENOMEM;
2994 for (i = 0; i < nchans; i++) {
2995 if (i2c_mux_add_adapter(muxc, 0, i)) {
2996 dev_err(dev, "Failed to register mux #%d\n", i);
2997 i2c_mux_del_adapters(muxc);
2998 return -ENODEV;
2999 }
3000 }
3001
3002 i2c_set_clientdata(client, muxc);
3003
3004 return 0;
3005 };
3006
unittest_i2c_mux_remove(struct i2c_client * client)3007 static void unittest_i2c_mux_remove(struct i2c_client *client)
3008 {
3009 struct device *dev = &client->dev;
3010 struct device_node *np = client->dev.of_node;
3011 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
3012
3013 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
3014 i2c_mux_del_adapters(muxc);
3015 }
3016
3017 static const struct i2c_device_id unittest_i2c_mux_id[] = {
3018 { .name = "unittest-i2c-mux" },
3019 { }
3020 };
3021
3022 static struct i2c_driver unittest_i2c_mux_driver = {
3023 .driver = {
3024 .name = "unittest-i2c-mux",
3025 },
3026 .probe = unittest_i2c_mux_probe,
3027 .remove = unittest_i2c_mux_remove,
3028 .id_table = unittest_i2c_mux_id,
3029 };
3030
3031 #endif
3032
of_unittest_overlay_i2c_init(void)3033 static int of_unittest_overlay_i2c_init(void)
3034 {
3035 int ret;
3036
3037 ret = i2c_add_driver(&unittest_i2c_dev_driver);
3038 if (unittest(ret == 0,
3039 "could not register unittest i2c device driver\n"))
3040 return ret;
3041
3042 ret = platform_driver_register(&unittest_i2c_bus_driver);
3043
3044 if (unittest(ret == 0,
3045 "could not register unittest i2c bus driver\n"))
3046 return ret;
3047
3048 #if IS_BUILTIN(CONFIG_I2C_MUX)
3049
3050 EXPECT_BEGIN(KERN_INFO,
3051 "i2c i2c-1: Added multiplexed i2c bus 2");
3052
3053 ret = i2c_add_driver(&unittest_i2c_mux_driver);
3054
3055 EXPECT_END(KERN_INFO,
3056 "i2c i2c-1: Added multiplexed i2c bus 2");
3057
3058 if (unittest(ret == 0,
3059 "could not register unittest i2c mux driver\n"))
3060 return ret;
3061 #endif
3062
3063 return 0;
3064 }
3065
of_unittest_overlay_i2c_cleanup(void)3066 static void of_unittest_overlay_i2c_cleanup(void)
3067 {
3068 #if IS_BUILTIN(CONFIG_I2C_MUX)
3069 i2c_del_driver(&unittest_i2c_mux_driver);
3070 #endif
3071 platform_driver_unregister(&unittest_i2c_bus_driver);
3072 i2c_del_driver(&unittest_i2c_dev_driver);
3073 }
3074
of_unittest_overlay_i2c_12(void)3075 static void __init of_unittest_overlay_i2c_12(void)
3076 {
3077 int ret;
3078
3079 /* device should enable */
3080 EXPECT_BEGIN(KERN_INFO,
3081 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
3082
3083 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
3084
3085 EXPECT_END(KERN_INFO,
3086 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
3087
3088 if (ret)
3089 return;
3090
3091 unittest(1, "overlay test %d passed\n", 12);
3092 }
3093
3094 /* test deactivation of device */
of_unittest_overlay_i2c_13(void)3095 static void __init of_unittest_overlay_i2c_13(void)
3096 {
3097 int ret;
3098
3099 EXPECT_BEGIN(KERN_INFO,
3100 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
3101
3102 /* device should disable */
3103 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
3104
3105 EXPECT_END(KERN_INFO,
3106 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
3107
3108 if (ret)
3109 return;
3110
3111 unittest(1, "overlay test %d passed\n", 13);
3112 }
3113
3114 /* just check for i2c mux existence */
of_unittest_overlay_i2c_14(void)3115 static void of_unittest_overlay_i2c_14(void)
3116 {
3117 }
3118
of_unittest_overlay_i2c_15(void)3119 static void __init of_unittest_overlay_i2c_15(void)
3120 {
3121 int ret;
3122
3123 /* device should enable */
3124 EXPECT_BEGIN(KERN_INFO,
3125 "i2c i2c-1: Added multiplexed i2c bus 3");
3126
3127 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
3128
3129 EXPECT_END(KERN_INFO,
3130 "i2c i2c-1: Added multiplexed i2c bus 3");
3131
3132 if (ret)
3133 return;
3134
3135 unittest(1, "overlay test %d passed\n", 15);
3136 }
3137
3138 #else
3139
of_unittest_overlay_i2c_14(void)3140 static inline void of_unittest_overlay_i2c_14(void) { }
of_unittest_overlay_i2c_15(void)3141 static inline void of_unittest_overlay_i2c_15(void) { }
3142
3143 #endif
3144
of_notify(struct notifier_block * nb,unsigned long action,void * arg)3145 static int of_notify(struct notifier_block *nb, unsigned long action,
3146 void *arg)
3147 {
3148 struct of_overlay_notify_data *nd = arg;
3149 struct device_node *found;
3150 int ret;
3151
3152 /*
3153 * For overlay_16 .. overlay_19, check that returning an error
3154 * works for each of the actions by setting an arbitrary return
3155 * error number that matches the test number. e.g. for unittest16,
3156 * ret = -EBUSY which is -16.
3157 *
3158 * OVERLAY_INFO() for the overlays is declared to expect the same
3159 * error number, so overlay_data_apply() will return no error.
3160 *
3161 * overlay_20 will return NOTIFY_DONE
3162 */
3163
3164 ret = 0;
3165 of_node_get(nd->overlay);
3166
3167 switch (action) {
3168
3169 case OF_OVERLAY_PRE_APPLY:
3170 found = of_find_node_by_name(nd->overlay, "test-unittest16");
3171 if (found) {
3172 of_node_put(found);
3173 ret = -EBUSY;
3174 }
3175 break;
3176
3177 case OF_OVERLAY_POST_APPLY:
3178 found = of_find_node_by_name(nd->overlay, "test-unittest17");
3179 if (found) {
3180 of_node_put(found);
3181 ret = -EEXIST;
3182 }
3183 break;
3184
3185 case OF_OVERLAY_PRE_REMOVE:
3186 found = of_find_node_by_name(nd->overlay, "test-unittest18");
3187 if (found) {
3188 of_node_put(found);
3189 ret = -EXDEV;
3190 }
3191 break;
3192
3193 case OF_OVERLAY_POST_REMOVE:
3194 found = of_find_node_by_name(nd->overlay, "test-unittest19");
3195 if (found) {
3196 of_node_put(found);
3197 ret = -ENODEV;
3198 }
3199 break;
3200
3201 default: /* should not happen */
3202 of_node_put(nd->overlay);
3203 ret = -EINVAL;
3204 break;
3205 }
3206
3207 if (ret)
3208 return notifier_from_errno(ret);
3209
3210 return NOTIFY_DONE;
3211 }
3212
3213 static struct notifier_block of_nb = {
3214 .notifier_call = of_notify,
3215 };
3216
of_unittest_overlay_notify(void)3217 static void __init of_unittest_overlay_notify(void)
3218 {
3219 int ovcs_id;
3220 int ret;
3221
3222 ret = of_overlay_notifier_register(&of_nb);
3223 unittest(!ret,
3224 "of_overlay_notifier_register() failed, ret = %d\n", ret);
3225 if (ret)
3226 return;
3227
3228 /*
3229 * The overlays are applied by overlay_data_apply()
3230 * instead of of_unittest_apply_overlay() so that they
3231 * will not be tracked. Thus they will not be removed
3232 * by of_unittest_remove_tracked_overlays().
3233 *
3234 * Applying overlays 16 - 19 will each trigger an error for a
3235 * different action in of_notify().
3236 *
3237 * Applying overlay 20 will not trigger any error in of_notify().
3238 */
3239
3240 /* --- overlay 16 --- */
3241
3242 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
3243
3244 unittest(overlay_data_apply("overlay_16", &ovcs_id),
3245 "test OF_OVERLAY_PRE_APPLY notify injected error\n");
3246
3247 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
3248
3249 unittest(ovcs_id, "ovcs_id not created for overlay_16\n");
3250
3251 /* --- overlay 17 --- */
3252
3253 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
3254
3255 unittest(overlay_data_apply("overlay_17", &ovcs_id),
3256 "test OF_OVERLAY_POST_APPLY notify injected error\n");
3257
3258 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
3259
3260 unittest(ovcs_id, "ovcs_id not created for overlay_17\n");
3261
3262 /* --- overlay 18 --- */
3263
3264 unittest(overlay_data_apply("overlay_18", &ovcs_id),
3265 "OF_OVERLAY_PRE_REMOVE notify injected error\n");
3266
3267 unittest(ovcs_id, "ovcs_id not created for overlay_18\n");
3268
3269 if (ovcs_id) {
3270 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
3271
3272 ret = of_overlay_remove(&ovcs_id);
3273 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
3274 if (ret == -EXDEV) {
3275 /*
3276 * change set ovcs_id should still exist
3277 */
3278 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n");
3279 } else {
3280 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n");
3281 }
3282 } else {
3283 unittest(1, "ovcs_id not created for overlay_18\n");
3284 }
3285
3286 unittest(ovcs_id, "ovcs_id removed for overlay_18\n");
3287
3288 /* --- overlay 19 --- */
3289
3290 unittest(overlay_data_apply("overlay_19", &ovcs_id),
3291 "OF_OVERLAY_POST_REMOVE notify injected error\n");
3292
3293 unittest(ovcs_id, "ovcs_id not created for overlay_19\n");
3294
3295 if (ovcs_id) {
3296 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
3297 ret = of_overlay_remove(&ovcs_id);
3298 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
3299 if (ret == -ENODEV)
3300 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n");
3301 else
3302 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n");
3303 } else {
3304 unittest(1, "ovcs_id removed for overlay_19\n");
3305 }
3306
3307 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n",
3308 ovcs_id);
3309
3310 /* --- overlay 20 --- */
3311
3312 unittest(overlay_data_apply("overlay_20", &ovcs_id),
3313 "overlay notify no injected error\n");
3314
3315 if (ovcs_id) {
3316 ret = of_overlay_remove(&ovcs_id);
3317 if (ret)
3318 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n",
3319 ret);
3320 } else {
3321 unittest(1, "ovcs_id not created for overlay_20\n");
3322 }
3323
3324 unittest(!of_overlay_notifier_unregister(&of_nb),
3325 "of_overlay_notifier_unregister() failed, ret = %d\n", ret);
3326 }
3327
of_unittest_overlay(void)3328 static void __init of_unittest_overlay(void)
3329 {
3330 struct device_node *bus_np = NULL;
3331 unsigned int i;
3332
3333 if (platform_driver_register(&unittest_driver)) {
3334 unittest(0, "could not register unittest driver\n");
3335 goto out;
3336 }
3337
3338 bus_np = of_find_node_by_path(bus_path);
3339 if (bus_np == NULL) {
3340 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
3341 goto out;
3342 }
3343
3344 if (of_platform_default_populate(bus_np, NULL, NULL)) {
3345 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
3346 goto out;
3347 }
3348
3349 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
3350 unittest(0, "could not find unittest0 @ \"%s\"\n",
3351 unittest_path(100, PDEV_OVERLAY));
3352 goto out;
3353 }
3354
3355 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
3356 unittest(0, "unittest1 @ \"%s\" should not exist\n",
3357 unittest_path(101, PDEV_OVERLAY));
3358 goto out;
3359 }
3360
3361 unittest(1, "basic infrastructure of overlays passed");
3362
3363 /* tests in sequence */
3364 of_unittest_overlay_0();
3365 of_unittest_overlay_1();
3366 of_unittest_overlay_2();
3367 of_unittest_overlay_3();
3368 of_unittest_overlay_4();
3369 for (i = 0; i < 3; i++)
3370 of_unittest_overlay_5();
3371 of_unittest_overlay_6();
3372 of_unittest_overlay_8();
3373
3374 of_unittest_overlay_10();
3375 of_unittest_overlay_11();
3376
3377 #if IS_BUILTIN(CONFIG_I2C)
3378 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
3379 goto out;
3380
3381 of_unittest_overlay_i2c_12();
3382 of_unittest_overlay_i2c_13();
3383 of_unittest_overlay_i2c_14();
3384 of_unittest_overlay_i2c_15();
3385
3386 of_unittest_overlay_i2c_cleanup();
3387 #endif
3388
3389 of_unittest_overlay_gpio();
3390
3391 of_unittest_remove_tracked_overlays();
3392
3393 of_unittest_overlay_notify();
3394
3395 out:
3396 of_node_put(bus_np);
3397 }
3398
3399 #else
of_unittest_overlay(void)3400 static inline void __init of_unittest_overlay(void) { }
3401 #endif
3402
of_unittest_lifecycle(void)3403 static void __init of_unittest_lifecycle(void)
3404 {
3405 #ifdef CONFIG_OF_DYNAMIC
3406 unsigned int refcount;
3407 int found_refcount_one = 0;
3408 int put_count = 0;
3409 struct device_node *np;
3410 struct device_node *prev_sibling, *next_sibling;
3411 const char *refcount_path = "/testcase-data/refcount-node";
3412 const char *refcount_parent_path = "/testcase-data";
3413
3414 /*
3415 * Node lifecycle tests, non-dynamic node:
3416 *
3417 * - Decrementing refcount to zero via of_node_put() should cause the
3418 * attempt to free the node memory by of_node_release() to fail
3419 * because the node is not a dynamic node.
3420 *
3421 * - Decrementing refcount past zero should result in additional
3422 * errors reported.
3423 */
3424
3425 np = of_find_node_by_path(refcount_path);
3426 unittest(np, "find refcount_path \"%s\"\n", refcount_path);
3427 if (np == NULL)
3428 goto out_skip_tests;
3429
3430 while (!found_refcount_one) {
3431
3432 if (put_count++ > 10) {
3433 unittest(0, "guardrail to avoid infinite loop\n");
3434 goto out_skip_tests;
3435 }
3436
3437 refcount = kref_read(&np->kobj.kref);
3438 if (refcount == 1)
3439 found_refcount_one = 1;
3440 else
3441 of_node_put(np);
3442 }
3443
3444 EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
3445
3446 /*
3447 * refcount is now one, decrementing to zero will result in a call to
3448 * of_node_release() to free the node's memory, which should result
3449 * in an error
3450 */
3451 unittest(1, "/testcase-data/refcount-node is one");
3452 of_node_put(np);
3453
3454 EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
3455
3456
3457 /*
3458 * expect stack trace for subsequent of_node_put():
3459 * __refcount_sub_and_test() calls:
3460 * refcount_warn_saturate(r, REFCOUNT_SUB_UAF)
3461 *
3462 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just
3463 * the first three lines, and the last line.
3464 */
3465 EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
3466 EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>");
3467 EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
3468 EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
3469
3470 /* refcount is now zero, this should fail */
3471 unittest(1, "/testcase-data/refcount-node is zero");
3472 of_node_put(np);
3473
3474 EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---");
3475 EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
3476 EXPECT_END(KERN_INFO, "WARNING: <<all>>");
3477 EXPECT_END(KERN_INFO, "------------[ cut here ]------------");
3478
3479 /*
3480 * Q. do we expect to get yet another warning?
3481 * A. no, the WARNING is from WARN_ONCE()
3482 */
3483 EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
3484 EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>");
3485 EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
3486 EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
3487
3488 unittest(1, "/testcase-data/refcount-node is zero, second time");
3489 of_node_put(np);
3490
3491 EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---");
3492 EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
3493 EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>");
3494 EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------");
3495
3496 /*
3497 * refcount of zero will trigger stack traces from any further
3498 * attempt to of_node_get() node "refcount-node". One example of
3499 * this is where of_unittest_check_node_linkage() will recursively
3500 * scan the tree, with 'for_each_child_of_node()' doing an
3501 * of_node_get() of the children of a node.
3502 *
3503 * Prevent the stack trace by removing node "refcount-node" from
3504 * its parent's child list.
3505 *
3506 * WARNING: EVIL, EVIL, EVIL:
3507 *
3508 * Directly manipulate the child list of node /testcase-data to
3509 * remove child refcount-node. This is ignoring all proper methods
3510 * of removing a child and will leak a small amount of memory.
3511 */
3512
3513 np = of_find_node_by_path(refcount_parent_path);
3514 unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path);
3515 unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n");
3516 if (np == NULL)
3517 return;
3518
3519 prev_sibling = np->child;
3520 next_sibling = prev_sibling->sibling;
3521 if (!strcmp(prev_sibling->full_name, "refcount-node")) {
3522 np->child = next_sibling;
3523 next_sibling = next_sibling->sibling;
3524 }
3525 while (next_sibling) {
3526 if (!strcmp(next_sibling->full_name, "refcount-node"))
3527 prev_sibling->sibling = next_sibling->sibling;
3528 prev_sibling = next_sibling;
3529 next_sibling = next_sibling->sibling;
3530 }
3531 of_node_put(np);
3532
3533 return;
3534
3535 out_skip_tests:
3536 #endif
3537 unittest(0, "One or more lifecycle tests skipped\n");
3538 }
3539
3540 #ifdef CONFIG_OF_OVERLAY
3541
3542 /*
3543 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
3544 * created by cmd_wrap_S_dtbo in scripts/Makefile.dtbs
3545 */
3546
3547 #define OVERLAY_INFO_EXTERN(overlay_name) \
3548 extern uint8_t __dtbo_##overlay_name##_begin[]; \
3549 extern uint8_t __dtbo_##overlay_name##_end[]
3550
3551 #define OVERLAY_INFO(overlay_name, expected, expected_remove) \
3552 { .dtbo_begin = __dtbo_##overlay_name##_begin, \
3553 .dtbo_end = __dtbo_##overlay_name##_end, \
3554 .expected_result = expected, \
3555 .expected_result_remove = expected_remove, \
3556 .name = #overlay_name, \
3557 }
3558
3559 struct overlay_info {
3560 uint8_t *dtbo_begin;
3561 uint8_t *dtbo_end;
3562 int expected_result;
3563 int expected_result_remove; /* if apply failed */
3564 int ovcs_id;
3565 char *name;
3566 };
3567
3568 OVERLAY_INFO_EXTERN(overlay_base);
3569 OVERLAY_INFO_EXTERN(overlay);
3570 OVERLAY_INFO_EXTERN(overlay_0);
3571 OVERLAY_INFO_EXTERN(overlay_1);
3572 OVERLAY_INFO_EXTERN(overlay_2);
3573 OVERLAY_INFO_EXTERN(overlay_3);
3574 OVERLAY_INFO_EXTERN(overlay_4);
3575 OVERLAY_INFO_EXTERN(overlay_5);
3576 OVERLAY_INFO_EXTERN(overlay_6);
3577 OVERLAY_INFO_EXTERN(overlay_7);
3578 OVERLAY_INFO_EXTERN(overlay_8);
3579 OVERLAY_INFO_EXTERN(overlay_9);
3580 OVERLAY_INFO_EXTERN(overlay_10);
3581 OVERLAY_INFO_EXTERN(overlay_11);
3582 OVERLAY_INFO_EXTERN(overlay_12);
3583 OVERLAY_INFO_EXTERN(overlay_13);
3584 OVERLAY_INFO_EXTERN(overlay_15);
3585 OVERLAY_INFO_EXTERN(overlay_16);
3586 OVERLAY_INFO_EXTERN(overlay_17);
3587 OVERLAY_INFO_EXTERN(overlay_18);
3588 OVERLAY_INFO_EXTERN(overlay_19);
3589 OVERLAY_INFO_EXTERN(overlay_20);
3590 OVERLAY_INFO_EXTERN(overlay_gpio_01);
3591 OVERLAY_INFO_EXTERN(overlay_gpio_02a);
3592 OVERLAY_INFO_EXTERN(overlay_gpio_02b);
3593 OVERLAY_INFO_EXTERN(overlay_gpio_03);
3594 OVERLAY_INFO_EXTERN(overlay_gpio_04a);
3595 OVERLAY_INFO_EXTERN(overlay_gpio_04b);
3596 OVERLAY_INFO_EXTERN(overlay_pci_node);
3597 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
3598 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
3599 OVERLAY_INFO_EXTERN(overlay_bad_phandle);
3600 OVERLAY_INFO_EXTERN(overlay_bad_symbol);
3601 OVERLAY_INFO_EXTERN(overlay_bad_unresolved);
3602
3603 /* entries found by name */
3604 static struct overlay_info overlays[] = {
3605 OVERLAY_INFO(overlay_base, -9999, 0),
3606 OVERLAY_INFO(overlay, 0, 0),
3607 OVERLAY_INFO(overlay_0, 0, 0),
3608 OVERLAY_INFO(overlay_1, 0, 0),
3609 OVERLAY_INFO(overlay_2, 0, 0),
3610 OVERLAY_INFO(overlay_3, 0, 0),
3611 OVERLAY_INFO(overlay_4, 0, 0),
3612 OVERLAY_INFO(overlay_5, 0, 0),
3613 OVERLAY_INFO(overlay_6, 0, 0),
3614 OVERLAY_INFO(overlay_7, 0, 0),
3615 OVERLAY_INFO(overlay_8, 0, 0),
3616 OVERLAY_INFO(overlay_9, 0, 0),
3617 OVERLAY_INFO(overlay_10, 0, 0),
3618 OVERLAY_INFO(overlay_11, 0, 0),
3619 OVERLAY_INFO(overlay_12, 0, 0),
3620 OVERLAY_INFO(overlay_13, 0, 0),
3621 OVERLAY_INFO(overlay_15, 0, 0),
3622 OVERLAY_INFO(overlay_16, -EBUSY, 0),
3623 OVERLAY_INFO(overlay_17, -EEXIST, 0),
3624 OVERLAY_INFO(overlay_18, 0, 0),
3625 OVERLAY_INFO(overlay_19, 0, 0),
3626 OVERLAY_INFO(overlay_20, 0, 0),
3627 OVERLAY_INFO(overlay_gpio_01, 0, 0),
3628 OVERLAY_INFO(overlay_gpio_02a, 0, 0),
3629 OVERLAY_INFO(overlay_gpio_02b, 0, 0),
3630 OVERLAY_INFO(overlay_gpio_03, 0, 0),
3631 OVERLAY_INFO(overlay_gpio_04a, 0, 0),
3632 OVERLAY_INFO(overlay_gpio_04b, 0, 0),
3633 OVERLAY_INFO(overlay_pci_node, 0, 0),
3634 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL, -ENODEV),
3635 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL, -ENODEV),
3636 OVERLAY_INFO(overlay_bad_phandle, -EINVAL, 0),
3637 OVERLAY_INFO(overlay_bad_symbol, -EINVAL, -ENODEV),
3638 OVERLAY_INFO(overlay_bad_unresolved, -EINVAL, 0),
3639 /* end marker */
3640 { }
3641 };
3642
3643 static struct device_node *overlay_base_root;
3644
dt_alloc_memory(u64 size,u64 align)3645 static void * __init dt_alloc_memory(u64 size, u64 align)
3646 {
3647 void *ptr = memblock_alloc(size, align);
3648
3649 if (!ptr)
3650 panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
3651 __func__, size, align);
3652
3653 return ptr;
3654 }
3655
3656 /*
3657 * Create base device tree for the overlay unittest.
3658 *
3659 * This is called from very early boot code.
3660 *
3661 * Do as much as possible the same way as done in __unflatten_device_tree
3662 * and other early boot steps for the normal FDT so that the overlay base
3663 * unflattened tree will have the same characteristics as the real tree
3664 * (such as having memory allocated by the early allocator). The goal
3665 * is to test "the real thing" as much as possible, and test "test setup
3666 * code" as little as possible.
3667 *
3668 * Have to stop before resolving phandles, because that uses kmalloc.
3669 */
unittest_unflatten_overlay_base(void)3670 void __init unittest_unflatten_overlay_base(void)
3671 {
3672 struct overlay_info *info;
3673 u32 data_size;
3674 void *new_fdt;
3675 u32 size;
3676 int found = 0;
3677 const char *overlay_name = "overlay_base";
3678
3679 for (info = overlays; info && info->name; info++) {
3680 if (!strcmp(overlay_name, info->name)) {
3681 found = 1;
3682 break;
3683 }
3684 }
3685 if (!found) {
3686 pr_err("no overlay data for %s\n", overlay_name);
3687 return;
3688 }
3689
3690 info = &overlays[0];
3691
3692 if (info->expected_result != -9999) {
3693 pr_err("No dtb 'overlay_base' to attach\n");
3694 return;
3695 }
3696
3697 data_size = info->dtbo_end - info->dtbo_begin;
3698 if (!data_size) {
3699 pr_err("No dtb 'overlay_base' to attach\n");
3700 return;
3701 }
3702
3703 size = fdt_totalsize(info->dtbo_begin);
3704 if (size != data_size) {
3705 pr_err("dtb 'overlay_base' header totalsize != actual size");
3706 return;
3707 }
3708
3709 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
3710 if (!new_fdt) {
3711 pr_err("alloc for dtb 'overlay_base' failed");
3712 return;
3713 }
3714
3715 memcpy(new_fdt, info->dtbo_begin, size);
3716
3717 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
3718 dt_alloc_memory, true);
3719 }
3720
3721 /*
3722 * The purpose of of_unittest_overlay_data_add is to add an
3723 * overlay in the normal fashion. This is a test of the whole
3724 * picture, instead of testing individual elements.
3725 *
3726 * A secondary purpose is to be able to verify that the contents of
3727 * /proc/device-tree/ contains the updated structure and values from
3728 * the overlay. That must be verified separately in user space.
3729 *
3730 * Return 0 on unexpected error.
3731 */
overlay_data_apply(const char * overlay_name,int * ovcs_id)3732 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id)
3733 {
3734 struct overlay_info *info;
3735 int passed = 1;
3736 int found = 0;
3737 int ret, ret2;
3738 u32 size;
3739
3740 for (info = overlays; info && info->name; info++) {
3741 if (!strcmp(overlay_name, info->name)) {
3742 found = 1;
3743 break;
3744 }
3745 }
3746 if (!found) {
3747 pr_err("no overlay data for %s\n", overlay_name);
3748 return 0;
3749 }
3750
3751 size = info->dtbo_end - info->dtbo_begin;
3752 if (!size)
3753 pr_err("no overlay data for %s\n", overlay_name);
3754
3755 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id,
3756 NULL);
3757 if (ovcs_id)
3758 *ovcs_id = info->ovcs_id;
3759 if (ret < 0)
3760 goto out;
3761
3762 pr_debug("%s applied\n", overlay_name);
3763
3764 out:
3765 if (ret != info->expected_result) {
3766 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
3767 info->expected_result, ret, overlay_name);
3768 passed = 0;
3769 }
3770
3771 if (ret < 0) {
3772 /* changeset may be partially applied */
3773 ret2 = of_overlay_remove(&info->ovcs_id);
3774 if (ret2 != info->expected_result_remove) {
3775 pr_err("of_overlay_remove() expected %d, ret=%d, %s\n",
3776 info->expected_result_remove, ret2,
3777 overlay_name);
3778 passed = 0;
3779 }
3780 }
3781
3782 return passed;
3783 }
3784
3785 /*
3786 * The purpose of of_unittest_overlay_high_level is to add an overlay
3787 * in the normal fashion. This is a test of the whole picture,
3788 * instead of individual elements.
3789 *
3790 * The first part of the function is _not_ normal overlay usage; it is
3791 * finishing splicing the base overlay device tree into the live tree.
3792 */
of_unittest_overlay_high_level(void)3793 static __init void of_unittest_overlay_high_level(void)
3794 {
3795 struct device_node *last_sibling;
3796 struct device_node *np;
3797 struct device_node *of_symbols;
3798 struct device_node *overlay_base_symbols;
3799 struct device_node **pprev;
3800 struct property *prop;
3801 int ret;
3802
3803 if (!overlay_base_root) {
3804 unittest(0, "overlay_base_root not initialized\n");
3805 return;
3806 }
3807
3808 /*
3809 * Could not fixup phandles in unittest_unflatten_overlay_base()
3810 * because kmalloc() was not yet available.
3811 */
3812 of_overlay_mutex_lock();
3813 of_resolve_phandles(overlay_base_root);
3814 of_overlay_mutex_unlock();
3815
3816
3817 /*
3818 * do not allow overlay_base to duplicate any node already in
3819 * tree, this greatly simplifies the code
3820 */
3821
3822 /*
3823 * remove overlay_base_root node "__local_fixups", after
3824 * being used by of_resolve_phandles()
3825 */
3826 pprev = &overlay_base_root->child;
3827 for (np = overlay_base_root->child; np; np = np->sibling) {
3828 if (of_node_name_eq(np, "__local_fixups__")) {
3829 *pprev = np->sibling;
3830 break;
3831 }
3832 pprev = &np->sibling;
3833 }
3834
3835 /* remove overlay_base_root node "__symbols__" if in live tree */
3836 of_symbols = of_get_child_by_name(of_root, "__symbols__");
3837 if (of_symbols) {
3838 /* will have to graft properties from node into live tree */
3839 pprev = &overlay_base_root->child;
3840 for (np = overlay_base_root->child; np; np = np->sibling) {
3841 if (of_node_name_eq(np, "__symbols__")) {
3842 overlay_base_symbols = np;
3843 *pprev = np->sibling;
3844 break;
3845 }
3846 pprev = &np->sibling;
3847 }
3848 }
3849
3850 for_each_child_of_node(overlay_base_root, np) {
3851 struct device_node *base_child;
3852 for_each_child_of_node(of_root, base_child) {
3853 if (!strcmp(np->full_name, base_child->full_name)) {
3854 unittest(0, "illegal node name in overlay_base %pOFn",
3855 np);
3856 of_node_put(np);
3857 of_node_put(base_child);
3858 return;
3859 }
3860 }
3861 }
3862
3863 /*
3864 * overlay 'overlay_base' is not allowed to have root
3865 * properties, so only need to splice nodes into main device tree.
3866 *
3867 * root node of *overlay_base_root will not be freed, it is lost
3868 * memory.
3869 */
3870
3871 for (np = overlay_base_root->child; np; np = np->sibling)
3872 np->parent = of_root;
3873
3874 mutex_lock(&of_mutex);
3875
3876 for (last_sibling = np = of_root->child; np; np = np->sibling)
3877 last_sibling = np;
3878
3879 if (last_sibling)
3880 last_sibling->sibling = overlay_base_root->child;
3881 else
3882 of_root->child = overlay_base_root->child;
3883
3884 for_each_of_allnodes_from(overlay_base_root, np)
3885 __of_attach_node_sysfs(np);
3886
3887 if (of_symbols) {
3888 struct property *new_prop;
3889 for_each_property_of_node(overlay_base_symbols, prop) {
3890
3891 new_prop = __of_prop_dup(prop, GFP_KERNEL);
3892 if (!new_prop) {
3893 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
3894 prop->name);
3895 goto err_unlock;
3896 }
3897 if (__of_add_property(of_symbols, new_prop)) {
3898 __of_prop_free(new_prop);
3899 /* "name" auto-generated by unflatten */
3900 if (!strcmp(prop->name, "name"))
3901 continue;
3902 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
3903 prop->name);
3904 goto err_unlock;
3905 }
3906 if (__of_add_property_sysfs(of_symbols, new_prop)) {
3907 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
3908 prop->name);
3909 goto err_unlock;
3910 }
3911 }
3912 }
3913
3914 mutex_unlock(&of_mutex);
3915
3916
3917 /* now do the normal overlay usage test */
3918
3919 /* --- overlay --- */
3920
3921 EXPECT_BEGIN(KERN_ERR,
3922 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
3923 EXPECT_BEGIN(KERN_ERR,
3924 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
3925 EXPECT_BEGIN(KERN_ERR,
3926 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
3927 EXPECT_BEGIN(KERN_ERR,
3928 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3929 EXPECT_BEGIN(KERN_ERR,
3930 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3931 EXPECT_BEGIN(KERN_ERR,
3932 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3933 EXPECT_BEGIN(KERN_ERR,
3934 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3935 EXPECT_BEGIN(KERN_ERR,
3936 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3937 EXPECT_BEGIN(KERN_ERR,
3938 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3939 EXPECT_BEGIN(KERN_ERR,
3940 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3941 EXPECT_BEGIN(KERN_ERR,
3942 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3943
3944 ret = overlay_data_apply("overlay", NULL);
3945
3946 EXPECT_END(KERN_ERR,
3947 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3948 EXPECT_END(KERN_ERR,
3949 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3950 EXPECT_END(KERN_ERR,
3951 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3952 EXPECT_END(KERN_ERR,
3953 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3954 EXPECT_END(KERN_ERR,
3955 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3956 EXPECT_END(KERN_ERR,
3957 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3958 EXPECT_END(KERN_ERR,
3959 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3960 EXPECT_END(KERN_ERR,
3961 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3962 EXPECT_END(KERN_ERR,
3963 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
3964 EXPECT_END(KERN_ERR,
3965 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
3966 EXPECT_END(KERN_ERR,
3967 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
3968
3969 unittest(ret, "Adding overlay 'overlay' failed\n");
3970
3971 /* --- overlay_bad_add_dup_node --- */
3972
3973 EXPECT_BEGIN(KERN_ERR,
3974 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
3975 EXPECT_BEGIN(KERN_ERR,
3976 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
3977 EXPECT_BEGIN(KERN_ERR,
3978 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
3979 EXPECT_BEGIN(KERN_ERR,
3980 "OF: Error reverting changeset (-19)");
3981
3982 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
3983 "Adding overlay 'overlay_bad_add_dup_node' failed\n");
3984
3985 EXPECT_END(KERN_ERR,
3986 "OF: Error reverting changeset (-19)");
3987 EXPECT_END(KERN_ERR,
3988 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
3989 EXPECT_END(KERN_ERR,
3990 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
3991 EXPECT_END(KERN_ERR,
3992 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
3993
3994 /* --- overlay_bad_add_dup_prop --- */
3995
3996 EXPECT_BEGIN(KERN_ERR,
3997 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
3998 EXPECT_BEGIN(KERN_ERR,
3999 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
4000 EXPECT_BEGIN(KERN_ERR,
4001 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
4002 EXPECT_BEGIN(KERN_ERR,
4003 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
4004 EXPECT_BEGIN(KERN_ERR,
4005 "OF: Error reverting changeset (-19)");
4006
4007 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
4008 "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
4009
4010 EXPECT_END(KERN_ERR,
4011 "OF: Error reverting changeset (-19)");
4012 EXPECT_END(KERN_ERR,
4013 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
4014 EXPECT_END(KERN_ERR,
4015 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
4016 EXPECT_END(KERN_ERR,
4017 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
4018 EXPECT_END(KERN_ERR,
4019 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
4020
4021 /* --- overlay_bad_phandle --- */
4022
4023 unittest(overlay_data_apply("overlay_bad_phandle", NULL),
4024 "Adding overlay 'overlay_bad_phandle' failed\n");
4025
4026 /* --- overlay_bad_symbol --- */
4027
4028 EXPECT_BEGIN(KERN_ERR,
4029 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
4030 EXPECT_BEGIN(KERN_ERR,
4031 "OF: Error reverting changeset (-19)");
4032
4033 unittest(overlay_data_apply("overlay_bad_symbol", NULL),
4034 "Adding overlay 'overlay_bad_symbol' failed\n");
4035
4036 EXPECT_END(KERN_ERR,
4037 "OF: Error reverting changeset (-19)");
4038 EXPECT_END(KERN_ERR,
4039 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
4040
4041 /* --- overlay_bad_unresolved --- */
4042
4043 EXPECT_BEGIN(KERN_ERR,
4044 "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
4045 EXPECT_BEGIN(KERN_ERR,
4046 "OF: resolver: overlay phandle fixup failed: -22");
4047
4048 unittest(overlay_data_apply("overlay_bad_unresolved", NULL),
4049 "Adding overlay 'overlay_bad_unresolved' failed\n");
4050
4051 EXPECT_END(KERN_ERR,
4052 "OF: resolver: overlay phandle fixup failed: -22");
4053 EXPECT_END(KERN_ERR,
4054 "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
4055
4056 return;
4057
4058 err_unlock:
4059 mutex_unlock(&of_mutex);
4060 }
4061
4062 static int of_unittest_pci_dev_num;
4063 static int of_unittest_pci_child_num;
4064
4065 /*
4066 * PCI device tree node test driver
4067 */
4068 static const struct pci_device_id testdrv_pci_ids[] = {
4069 { PCI_DEVICE(PCI_VENDOR_ID_REDHAT, 0x5), }, /* PCI_VENDOR_ID_REDHAT */
4070 { 0, }
4071 };
4072
testdrv_probe(struct pci_dev * pdev,const struct pci_device_id * id)4073 static int testdrv_probe(struct pci_dev *pdev, const struct pci_device_id *id)
4074 {
4075 struct overlay_info *info;
4076 struct device_node *dn;
4077 int ret, ovcs_id;
4078 u32 size;
4079
4080 dn = pdev->dev.of_node;
4081 if (!dn) {
4082 dev_err(&pdev->dev, "does not find bus endpoint");
4083 return -EINVAL;
4084 }
4085
4086 for (info = overlays; info && info->name; info++) {
4087 if (!strcmp(info->name, "overlay_pci_node"))
4088 break;
4089 }
4090 if (!info || !info->name) {
4091 dev_err(&pdev->dev, "no overlay data for overlay_pci_node");
4092 return -ENODEV;
4093 }
4094
4095 size = info->dtbo_end - info->dtbo_begin;
4096 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &ovcs_id, dn);
4097 of_node_put(dn);
4098 if (ret)
4099 return ret;
4100
4101 of_platform_default_populate(dn, NULL, &pdev->dev);
4102 pci_set_drvdata(pdev, (void *)(uintptr_t)ovcs_id);
4103
4104 return 0;
4105 }
4106
testdrv_remove(struct pci_dev * pdev)4107 static void testdrv_remove(struct pci_dev *pdev)
4108 {
4109 int ovcs_id = (int)(uintptr_t)pci_get_drvdata(pdev);
4110
4111 of_platform_depopulate(&pdev->dev);
4112 of_overlay_remove(&ovcs_id);
4113 }
4114
4115 static struct pci_driver testdrv_driver = {
4116 .name = "pci_dt_testdrv",
4117 .id_table = testdrv_pci_ids,
4118 .probe = testdrv_probe,
4119 .remove = testdrv_remove,
4120 };
4121
unittest_pci_probe(struct platform_device * pdev)4122 static int unittest_pci_probe(struct platform_device *pdev)
4123 {
4124 struct resource *res;
4125 struct device *dev;
4126 u64 exp_addr;
4127
4128 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
4129 if (!res)
4130 return -ENODEV;
4131
4132 dev = &pdev->dev;
4133 while (dev && !dev_is_pci(dev))
4134 dev = dev->parent;
4135 if (!dev) {
4136 pr_err("unable to find parent device\n");
4137 return -ENODEV;
4138 }
4139
4140 exp_addr = pci_resource_start(to_pci_dev(dev), 0) + 0x100;
4141 unittest(res->start == exp_addr, "Incorrect translated address %llx, expected %llx\n",
4142 (u64)res->start, exp_addr);
4143
4144 of_unittest_pci_child_num++;
4145
4146 return 0;
4147 }
4148
4149 static const struct of_device_id unittest_pci_of_match[] = {
4150 { .compatible = "unittest-pci" },
4151 { }
4152 };
4153
4154 static struct platform_driver unittest_pci_driver = {
4155 .probe = unittest_pci_probe,
4156 .driver = {
4157 .name = "unittest-pci",
4158 .of_match_table = unittest_pci_of_match,
4159 },
4160 };
4161
of_unittest_pci_node_verify(struct pci_dev * pdev,bool add)4162 static int of_unittest_pci_node_verify(struct pci_dev *pdev, bool add)
4163 {
4164 struct device_node *pnp, *np = NULL;
4165 struct device *child_dev;
4166 char *path = NULL;
4167 const __be32 *reg;
4168 int rc = 0;
4169
4170 pnp = pdev->dev.of_node;
4171 unittest(pnp, "Failed creating PCI dt node\n");
4172 if (!pnp)
4173 return -ENODEV;
4174
4175 if (add) {
4176 path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0/unittest-pci@100", pnp);
4177 np = of_find_node_by_path(path);
4178 unittest(np, "Failed to get unittest-pci node under PCI node\n");
4179 if (!np) {
4180 rc = -ENODEV;
4181 goto failed;
4182 }
4183
4184 reg = of_get_property(np, "reg", NULL);
4185 unittest(reg, "Failed to get reg property\n");
4186 if (!reg)
4187 rc = -ENODEV;
4188 } else {
4189 path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0", pnp);
4190 np = of_find_node_by_path(path);
4191 unittest(!np, "Child device tree node is not removed\n");
4192 child_dev = device_find_any_child(&pdev->dev);
4193 unittest(!child_dev, "Child device is not removed\n");
4194 }
4195
4196 failed:
4197 kfree(path);
4198 if (np)
4199 of_node_put(np);
4200
4201 return rc;
4202 }
4203
of_unittest_pci_node(void)4204 static void __init of_unittest_pci_node(void)
4205 {
4206 struct pci_dev *pdev = NULL;
4207 int rc;
4208
4209 if (!IS_ENABLED(CONFIG_PCI_DYNAMIC_OF_NODES))
4210 return;
4211
4212 rc = pci_register_driver(&testdrv_driver);
4213 unittest(!rc, "Failed to register pci test driver; rc = %d\n", rc);
4214 if (rc)
4215 return;
4216
4217 rc = platform_driver_register(&unittest_pci_driver);
4218 if (unittest(!rc, "Failed to register unittest pci driver\n")) {
4219 pci_unregister_driver(&testdrv_driver);
4220 return;
4221 }
4222
4223 while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL) {
4224 of_unittest_pci_node_verify(pdev, true);
4225 of_unittest_pci_dev_num++;
4226 }
4227 if (pdev)
4228 pci_dev_put(pdev);
4229
4230 unittest(of_unittest_pci_dev_num,
4231 "No test PCI device been found. Please run QEMU with '-device pci-testdev'\n");
4232 unittest(of_unittest_pci_dev_num == of_unittest_pci_child_num,
4233 "Child device number %d is not expected %d", of_unittest_pci_child_num,
4234 of_unittest_pci_dev_num);
4235
4236 platform_driver_unregister(&unittest_pci_driver);
4237 pci_unregister_driver(&testdrv_driver);
4238
4239 while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL)
4240 of_unittest_pci_node_verify(pdev, false);
4241 if (pdev)
4242 pci_dev_put(pdev);
4243 }
4244 #else
4245
of_unittest_overlay_high_level(void)4246 static inline __init void of_unittest_overlay_high_level(void) {}
of_unittest_pci_node(void)4247 static inline __init void of_unittest_pci_node(void) { }
4248
4249 #endif
4250
of_unittest(void)4251 static int __init of_unittest(void)
4252 {
4253 struct device_node *np;
4254 int res;
4255
4256 pr_info("start of unittest - you will see error messages\n");
4257
4258 /* Taint the kernel so we know we've run tests. */
4259 add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
4260
4261 /* adding data for unittest */
4262 res = unittest_data_add();
4263 if (res)
4264 return res;
4265 if (!of_aliases)
4266 of_aliases = of_find_node_by_path("/aliases");
4267
4268 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
4269 if (!np) {
4270 pr_info("No testcase data in device tree; not running tests\n");
4271 return 0;
4272 }
4273 of_node_put(np);
4274
4275 of_unittest_check_tree_linkage();
4276 of_unittest_check_phandles();
4277 of_unittest_find_node_by_name();
4278 of_unittest_dynamic();
4279 of_unittest_parse_phandle_with_args();
4280 of_unittest_parse_phandle_with_args_map();
4281 of_unittest_printf();
4282 of_unittest_property_string();
4283 of_unittest_property_copy();
4284 of_unittest_changeset();
4285 of_unittest_changeset_prop();
4286 of_unittest_parse_interrupts();
4287 of_unittest_parse_interrupts_extended();
4288 of_unittest_dma_get_max_cpu_address();
4289 of_unittest_parse_dma_ranges();
4290 of_unittest_pci_dma_ranges();
4291 of_unittest_bus_ranges();
4292 of_unittest_bus_3cell_ranges();
4293 of_unittest_reg();
4294 of_unittest_translate_addr();
4295 of_unittest_match_node();
4296 of_unittest_platform_populate();
4297 of_unittest_overlay();
4298 of_unittest_lifecycle();
4299 of_unittest_pci_node();
4300
4301 /* Double check linkage after removing testcase data */
4302 of_unittest_check_tree_linkage();
4303
4304 of_unittest_overlay_high_level();
4305
4306 pr_info("end of unittest - %i passed, %i failed\n",
4307 unittest_results.passed, unittest_results.failed);
4308
4309 return 0;
4310 }
4311 late_initcall(of_unittest);
4312